CN207732407U - A kind of 0.4kV power cables underground termination - Google Patents

Abstract

The utility model relates to an underground wiring device for 0.4kV power cables. The wiring device includes a shell with threaded sealing holes at both ends. The shell is an upper and lower split structure connected by bolts. A group of insulating plates arranged in parallel, the cable connection channel is formed between the insulating plate and the shell, and between the insulating plates. Connection, the two ends of the shell are rubber tubes, the inner hole of the rubber tube is a threaded sealing hole, the threaded sealing hole is in the shape of a bell mouth that gradually expands outward, and the thickness of the insulating plate is not less than 2mm; the utility model uses a shell with a threaded sealing hole Seal the cables that need to be connected, and isolate the cores of the cables by setting insulating plates to avoid short-circuit faults. cable connection failure rate.

Description

A 0.4kV power cable underground connection device

technical field

The utility model belongs to the technical field of electric power, in particular to an underground connection device for 0.4kV power cables.

Background technique

During the laying process of 0.4kV buried cables, intermediate connectors are often used due to insufficient cable length. Generally, low-voltage cables are connected by terminal connection or cable crimping, and then wrapped with insulating tape for insulation treatment. Since most of the low-voltage buried cables on site are directly buried in soil trenches, in the soil environment due to various factors such as humidity and operation, the cable joints are easy to oxidize and heat up, resulting in frequent joint disconnection faults, which affect the normal power supply of users or equipment. And it is still the same treatment method when it is restored, there is no better equipment or technical means suitable for on-site inspection and maintenance, resulting in an untimely "bomb" being reinstalled after the repair is completed, causing unnecessary damage to equipment and even personnel .

Utility model content

The utility model overcomes the defects of the prior art and provides an underground wiring device for 0.4kV power cables. The failure rate has significantly improved the reliability and safety of equipment operation.

Concrete technical scheme of the present utility model is:

An underground wiring device for 0.4kV power cables. The key point is that the wiring device includes a housing with threaded sealing holes at both ends. The housing is an upper and lower split structure connected by bolts. A group of insulating plates arranged in parallel, the cable connection channel is formed between the insulating plate and the shell, and between the insulating plates. connect.

Both ends of the housing are rubber tubes, and the inner hole of the rubber tube is a threaded sealing hole.

The threaded sealing hole is in the shape of a bell mouth gradually expanding outward.

The angle of the bell mouth is 5-20 degrees.

The thickness of the insulating board is not less than 2mm.

The beneficial effects of the utility model are: the utility model seals the connected cable joint position through the split housing, and the sealing part is the threaded sealing hole at both ends, which is set in the shape of a bell mouth gradually expanding outward, utilizing the elasticity of the rubber The clamping and sealing connection part not only has a good sealing effect, but also can be applied to cables of various diameters. Short circuit with electricity can also avoid breakdown when the current is too large, and is suitable for the connection of underground power cables.

The utility model solves the problems of anti-corrosion and insulation in construction before, greatly reduces the failure rate of joints, reduces the maintenance workload, ensures the safe operation of low-voltage buried cables more safely and reliably, and greatly improves the reliability, safety and reliability of equipment operation sex.

Description of drawings

Fig. 1 is a structural representation of the utility model.

FIG. 2 is a schematic diagram of the internal structure of FIG. 1 .

Fig. 3 is a left side view of Fig. 1 .

In the accompanying drawings, 1, threaded sealing hole, 2, housing, 201, rubber tube, 3, bolt, 4, insulating plate, 5, cable, 501, wire core, 6, backing plate.

Detailed ways

The utility model relates to an underground wiring device for 0.4kV power cables. The wiring device includes a casing 2 with threaded sealing holes 1 at both ends. The casing is an upper and lower split structure connected by bolts 3. A group of insulating plates 4 arranged in parallel in the longitudinal direction are arranged, and a cable connection channel is formed between the insulating plates 4 and the housing 2, and between the insulating plates 4, and the two ends of the disconnection of the same core 501 in the cable 5 respectively pass through two The thread sealing hole 1 at the end is connected along the same cable channel.

Specific embodiments, as shown in Figures 1 to 3, the two ends of the housing 2 are rubber tubes 201, the inner hole of the rubber tube 201 is a threaded sealing hole 1, the housing 2 includes an upper shell and a lower shell symmetrically arranged up and down, and the upper shell Bolt through holes corresponding to the upper and lower sides are provided with the lower shell, and a backing plate 6 is also provided between the two, which can improve the sealing effect of the joint after the connection is integrated. The setting of the split structure is convenient for the connection and placement of each core 501 of the cable 5 In the corresponding cable connection channel, as shown in FIG. 1 , the cable 5 includes four wire cores 501, each wire core 501 corresponds to a cable connection channel, and the upper shell and the lower shell are connected and fixed by bolts 3 to form an integrated structure. The threaded sealing holes 1 at both ends of the housing 2 can clamp the cable 5, and the clamping position forms a structure for the internal sealing of the housing 2, and the connection part of the cable 5 in the housing 2 will not be affected by the moist soil environment. The corrosion of the cable 5 is significantly alleviated, and the failure rate of the connection position is significantly reduced.

After the housing 2 is connected as a whole, the two ends of the threaded sealing hole 1 are formed. The threaded sealing hole 1 is in the shape of a bell mouth that gradually expands outward. Limited, the versatility is limited, and if the angle is greater than this angle, the thread contact surface between the cable 5 and the bell mouth will be reduced, which is not conducive to sealing. The cable 5 with a size larger than the minimum diameter of the bell mouth is clamped at the bell mouth, and the thread sealing port 1 and the cable 5 are in a sealed state, and because the rubber has a certain deformation, it can be sealed with cables 5 of various specifications Cooperate with good versatility, the thickness of the insulating plate 4 is not less than 2 mm, preferably 3 mm, so as to prevent the insulating plate 4 from being broken down when a strong current passes through the core 501 .

The utility model uses the fastening and detachable shell 2 as a sealed and holding space for the wire core 501 in the cable 5, and in this space, the insulating plate 4 is used to set the wire management path, and each wire core 501 is not easy to be connected incorrectly. , and it is not easy to connect the wires between the wire cores 501, even if the wiring position is loose or damaged, there will be no short circuit of the wires, and the wiring effect is good.

Claims (5)

1. An underground wiring device for 0.4kV power cables, characterized in that: the wiring device includes a housing (2) with threaded sealing holes (1) at both ends, and the housing is an upper and lower joint connected by bolts (3). Split structure, inside the casing (2) is provided with a group of insulating plates (4) arranged in parallel along the longitudinal direction, and cable connection channels are formed between the insulating plates (4) and the casing (2) and between the insulating plates (4) In the cable (5), the two ends of the disconnection of the same wire core (501) respectively pass through the threaded sealing holes (1) at both ends, and then are connected along the same cable channel. 2. A 0.4kV power cable underground connection device according to claim 1, characterized in that: the two ends of the housing (2) are rubber tubes (201), and the inner hole of the rubber tube (201) is threaded and sealed hole (1). 3. A 0.4kV power cable underground connection device according to claim 1, characterized in that: said threaded sealing hole (1) is in the shape of a bell mouth gradually expanding outward. 4. A 0.4kV power cable underground connection device according to claim 3, characterized in that: the angle of the bell mouth is 5-20 degrees. 5. An underground connection device for 0.4kV power cables according to claim 1, characterized in that the thickness of the insulating plate (4) is not less than 2mm.