CN104314353B - The installation method of line of power sheath and this sheath - Google Patents

Abstract

The invention belongs to the technical field of pull wire sheaths, and discloses a power pull wire sheath and an installation method for the sheath. Its main technical features are: it includes a sheath body with an end cap on the upper end, a plurality of air holes arranged in the axial direction are arranged on the sheath body, A plurality of drainage grooves arranged in the circumferential direction of the main body are provided with a conical air extraction pipe on the end cover, an air guide pipe is installed above the air extraction pipe, and an elbow is arranged at the upper end of the air guide pipe. The end of the head is provided with a first filter screen. When installing, the air hole is located on the side of the stay wire, the air guide tube is straightened along the stay wire direction, and the elbow is fixed on the stay wire. There is a height difference at the lower end of the cover, and there is a certain pressure difference in the surrounding air pressure. The air will enter from the drainage groove and the air hole and flow out from the elbow. The cover is more breathable.

Description

Power cable sheath and installation method of the sheath

technical field

The invention belongs to the technical field of pull wire sheaths, and in particular relates to a power pull wire sheath and an installation method for the sheath.

Background technique

With the intensification of the transformation of distribution lines in recent years, the distribution lines and supporting facilities have been continuously improved. The number of installations of cable sheaths is increasing day by day, but the problems that follow are also becoming more prominent. In daily work, it is often found that there is no serious corrosion of the hardware without the cable sheath after 10 or even 20 years of use, while the hardware with the cable sheath installed, the rainwater will flow down the cable and flow into the cable sheath However, its tightly closed structure makes it difficult for rainwater to flow out and form moisture, which corrodes the cable fittings for a long time. It is difficult to find that the wire fittings are corroded, which will bring hidden dangers to the safe operation in the future.

Contents of the invention

The first technical problem solved by the present invention is to provide a power cable sheath with good air permeability and not easy to corrode metal fittings.

In order to solve the above-mentioned technical problems, the technical solution proposed by the present invention is: comprising a sheath body with an end cap on the upper end, a plurality of air holes arranged in the axial direction are arranged on the sheath body, The lower end of the sheath body is provided with a plurality of drainage grooves arranged along the circumferential direction of the sheath body, and a conical exhaust pipe is provided on the end cover, and an air guide tube is installed above the air extractor tube. An elbow is provided, at the end of which a first screen is provided.

Its additional technical features are:

The vent hole is in the shape of a truncated cone with a large outside and a small inside, and a second filter screen is provided near the inside of the vent hole;

The inner wall of the sheath body inside the vent hole is provided with a pouring port whose inner end is inclined upward;

The angle of the elbow is an acute angle.

The second technical problem solved by the present invention is to provide a method for installing the above-mentioned power cable sheath.

In order to solve the problems of the technologies described above, the technical solution proposed by the present invention is:

The method includes the following steps:

The first step is to put the end cap and the jacket body on the pull wire

Put the side of the sheath body with the drain groove down on the pull wire, and put the end cover on the side of the sheath body on the pull wire;

The second step is to fix the end cap and the sheath body

Turn the sheath body so that the vent hole is located on the side of the pull wire, and the root of the exhaust pipe on the end cover is located above the pull wire. At this time, fix the end cover and the sheath body;

The third step is to fix the exhaust pipe

Bind the exhaust pipe with the pull wire with a rope near the middle and upper part of the exhaust pipe;

The fourth step, install and fix the air duct

Put the lower end of the air guide tube on the exhaust tube, straighten the air guide tube along the direction of the pull wire, and fix the elbow on the pull wire.

Compared with the prior art, the electric cable sheath provided by the present invention has the following advantages: First, since it includes a sheath body with an end cap on the upper end, the sheath body is provided with A plurality of ventilation holes, a plurality of drainage grooves arranged along the circumferential direction of the sheath body are arranged at the lower end of the sheath body, a conical air extraction pipe is arranged on the end cover, and a guide is installed above the air extraction pipe. Trachea, an elbow is arranged at the upper end of the air guide pipe, and a first filter screen is arranged at the end of the elbow. When installing, the vent hole is located on the side of the backguy, and the root of the air extraction pipe on the end cover is located above the backguy , near the middle and upper part of the exhaust pipe, use a rope to bind the exhaust pipe and the pull wire; put the lower end of the air guide tube on the exhaust pipe, and straighten the air guide pipe along the direction of the pull wire, fix the elbow on the pull wire, and the rainwater flowing down along the pull wire It reaches the sheath body and flows out through the drainage groove below. When there is wind, the air enters the inner side of the sheath body through the air hole and the drainage groove, and dries up the moisture remaining on the pull wire fittings. In the case of no wind, due to the suction The trachea is platform-shaped, and there is a height difference between the upper end of the air duct and the lower end of the sheath, and there is a certain pressure difference in the surrounding air pressure. The air will enter from the drainage groove and vent hole and flow out from the elbow. dry, avoiding long-term corrosion of the pull wire and hardware, and the sheath has better air permeability, prolonging the service life of the pull wire and hardware; the first filter prevents leaves or other sundries from clogging the elbow; second, due to the air hole It is a round platform shape with a large outside and a small inside, and a second filter screen is arranged near the inside of the air hole, even if fallen leaves, dust, etc. fall on the air hole, it will not cause the block of the air hole; The inner wall of the sheath body on the inner side is provided with a pouring port whose inner end is inclined upwards, which prevents rainwater from flowing into the interior of the sheath body from the vent hole; fourth, because the angle of the elbow is an acute angle, it ensures that the elbow is fixed on the pull wire After going up, the outlet of the elbow is obliquely downward, avoiding the clogging of fallen leaves or dust, and also avoiding the inflow of rainwater.

Description of drawings

Fig. 1 is the structural representation of the electric backguy sheath provided by the present invention;

Fig. 2 is a sectional view of the sheath body;

Fig. 3 is the sectional view of elbow;

Fig. 4 is a diagram of the use state of the power cable sheath provided by the invention.

detailed description

The power cable sheath proposed by the present invention will be further described below in conjunction with the accompanying drawings.

As shown in Fig. 1, Fig. 2 and Fig. 3, the schematic diagram of the structure of the power cable sheath. The power cable sheath includes a sheath tube body 2 with an end cap 1 on the upper end, a plurality of vent holes 3 arranged in the axial direction are arranged on the sheath body 2, and There are a plurality of drainage grooves 4 arranged in the circumferential direction of the body, and a wire hole 5 is provided at the center of the end cover 1. On one side of the wire hole 5, a conical suction pipe 6 is provided, and an air guide pipe 7 is installed above the suction pipe 6. An elbow 8 is arranged at the upper end of the air duct 7 , and a first filter screen 9 is arranged at the end of the elbow 8 . As shown in Figure 4, when installing, make the vent hole 3 be located on the side of the stay wire 10, place the exhaust pipe 6 on the end cover 1 above the stay wire, and tie the exhaust pipe 6 and the stay wire 10 with a rope 11 near the middle and upper part of the exhaust pipe 6 set; the lower end of the air guide tube 7 is placed on the exhaust tube 6, and the air guide tube 7 is straightened along the backguy 10 direction, the elbow 8 is fixed on the backguy, and the rainwater flowing down along the backguy 10 reaches the sheath body 2 through the drain below The water tank 4 flows out. When there is wind, the air enters the inner side of the sheath body through the air hole 3 and the drainage groove 4. A part of the air is discharged through the exhaust pipe 6, the air guide pipe 7 and the elbow 8, and the other part of the air is discharged through other air holes 3. , blow dry the moisture remaining on the pull wire fittings. In the absence of wind, since the exhaust pipe 6 is in the shape of a table, and there is a height difference between the upper end of the air guide pipe 7 and the lower end of the sheath body 2, there is a certain pressure difference in the surrounding air pressure, and the air It will enter from the drainage groove 4 and the air hole 3, and flow out from the elbow 8 through the exhaust pipe 6 and the air guide pipe 7. The water remaining in the fittings and the wires will also be dried in time to avoid long-term corrosion of the wires, fittings, and sheath. Better air permeability prolongs the service life of the stay wire and fittings; the first filter screen 9 prevents leaves or other sundries from clogging the elbow.

Ventilation hole 3 is the round frustum shape with big outside and small inside. A second filter screen 31 is arranged near the inside of vent hole 3. Even if fallen leaves, dust etc. fall on the vent hole, it will not cause blockage of the vent hole.

The inner wall of the sheath body inside the vent hole 3 is provided with a pouring port 32 whose inner end is inclined upwards, so as to prevent rainwater from flowing into the interior of the sheath body from the vent hole.

The angle of the elbow 8 is an acute angle, which ensures that after the elbow is fixed on the stay wire, the outlet of the elbow is obliquely downward, avoiding falling leaves or dust from being blocked, and avoiding the inflow of rainwater.

The installation method of the above-mentioned power cable sheath comprises the following steps:

The method includes the following steps:

The first step is to put the end cap and the jacket body on the pull wire

Put the side of the sheath body 2 with the drainage groove 4 downward on the stay wire 10, and put the end cap 1 on the side of the sheath body on the stay wire 10;

The second step is to fix the end cap and the sheath body

Turn the sheath body 2 so that the vent hole 3 is located on the side of the pull wire, and the root of the exhaust pipe 6 on the end cover 1 is located above the pull wire 10. At this time, the end cover 1 and the sheath body 2 are fixed;

The third step is to fix the exhaust pipe

Bind the exhaust pipe 6 with the stay wire with a rope near the upper part of the exhaust pipe 6;

The fourth step, install and fix the air duct

Put the lower end of the air guide tube 7 on the air extraction tube 6, straighten the air guide tube along the direction of the backguy 10, and fix the elbow 8 on the backguy 10.

The protection scope of the present invention is not limited to the above-mentioned embodiments, as long as the structure is the same as that of the power cable sheath of the present invention, it falls within the protection scope of the present invention.

Claims (5)

1. line of power sheath, comprise the sheath body of upper end with end cap, it is characterized in that: on described sheath body, be provided with multiple air-vents of in axial direction arranging, be provided with along multiple rhones of sheath body circumferential array in described sheath body lower end, on described end cap, be provided with round table-like exhaust tube, above described exhaust tube, wireway is installed, is provided with elbow in the upper end of described wireway, be provided with the first filter screen in the end of this elbow.

2. line of power sheath according to claim 1, is characterized in that: described air-vent is little round table-like of outer imperial palace, is being provided with the second filter screen near described air-vent inner side.

3. line of power sheath according to claim 1, is characterized in that: in the sheath inner body wall of described air-vent inner side, be provided with inner acclivitous pouring mouth.

4. line of power sheath according to claim 1, is characterized in that: the angle of described elbow is acute angle.

5. the method that the line of power sheath described in claim 1,2,3 or 4 is installed, is characterized in that: the method comprises the following steps:

The first step, is enclosed within end cap and sheath body in bracing wire

Sheath body, with being enclosed within bracing wire under rhone one side direction, and is positioned at end cap in to sheath body one side upper end and is enclosed within bracing wire;

Second step, fixes end cap and sheath body

Rotate sheath body, make air-vent be positioned at bracing wire side, the root of the exhaust tube on end cap is positioned to bracing wire top, now, end cap and sheath body are fixed;

The 3rd step, fixing exhaust tube

Exhaust tube and bracing wire are being bound with rope near exhaust tube middle and upper part;

The 4th step, installs and fixing wireway

Wireway lower end is enclosed within on exhaust tube, and wireway is stretched along stayguy direction, elbow is fixed in bracing wire.