CN212486111U - Power cable head butt joint box moisture removing device - Google Patents

Abstract

The utility model relates to a power supply and mechanical engineering field technical field. The utility model provides a power cable head butt joint case hydrofuge device, includes butt joint case, ventilation room, cable trench cover and cable pit, and butt joint case one side is provided with the ventilation room, and the cable is placed in the cable pit, is provided with cable trench cover on the cable pit, and cable head butt joint department sets up in the butt joint incasement, and this device is simple and practical to the ventilation hydrofuge method that cable head butt joint case took, easy to carry out, and the effect is showing, and reduction that can be more ideal causes the risk that the short circuit accident takes place because of the humidity is excessive.

Description

Power cable head butt joint box moisture removing device

Technical Field

The utility model relates to a power supply and mechanical engineering field technical field.

Background

The power cable head butt joint box is used, the butt joint mode of the cable heads with more than three branches is well solved, and the power cable head butt joint box has the advantages of small size, attractive appearance, flexible installation, convenience in construction and maintenance, no region limitation and the like and is more and more popularized and applied on the premise of ensuring insulation safety. Particularly, a cable power supply mode is improved for an overhead line, branch users are added to the cable, and the application of a cable head to a junction box is more and more indispensable in the aspects of power supply line migration improvement due to factory engineering extension and the like. However, with the attendant problems highlighted, the docking pod mounting area often suffers from the following: the lower cable trench often causes water accumulation and moisture due to various reasons (such as infiltration of surface water for irrigation in green lands, water leakage of underground pipelines and ditches and the like). The butt joint box is directly communicated with the cable trench, and water vapor easily enters the box body. Or because the box body is a relatively narrow and small closed (semi-closed) space, when the temperature difference changes greatly, the condensation effect can also cause the humidity inside the box body to increase. In such a humid environment, the space inside the butt joint box is relatively narrow, the joint conductors are spaced, the distance to the ground is short, and the joint conductors are exposed and semi-exposed (the cable head is installed and insulated and encapsulated, and cannot be completely insulated and sealed), so that a short-circuit accident can occur when the humidity exceeds the critical value. Therefore, it is necessary to design and use an effective ventilation and moisture-removing method to improve the safe operation of the butt-joint box. The existing cable head butt joint box has weak moisture-removing and ventilation functions and can not meet the requirements in some occasions.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a power cable head is to above-mentioned problem, provides a case damp-repellent device that docks.

The purpose of the utility model is realized like this: a power cable head butt joint box moisture removing device comprises a butt joint box, a ventilation room, a cable trench cover plate and a cable trench, wherein the ventilation room is arranged on one side of the butt joint box, a cable is placed in the cable trench, the cable trench is provided with the cable trench cover plate, the butt joint position of the cable head is arranged in the butt joint box, box walls are arranged on the periphery of the butt joint box, box tops are arranged on the box walls, an opening is formed in one of the box walls, a box door is arranged at the opening, a ventilation seam is arranged on the box door, ventilation seams are arranged on the other three box walls, protruding eaves are outwards arranged on the upper portion of each ventilation seam, each box top is a triangular pyramid-shaped box top, the included angle between the bottom edge of each triangular pyramid-shaped box top and the inclined edge is 30-60 degrees, a vertical connecting plate is welded below the bottom edge of each triangular pyramid-shaped box top, a horizontal connecting plate is welded at the other end of each vertical connecting plate, the horizontal connecting plates are provided with air vents; the ventilation window has been seted up on the wall around the room that ventilates, ventilation window department all is provided with the fence, and the room roof that ventilates is provided with the slope.

Further, the slope of the roof of the ventilating house is 15-40 degrees.

Furthermore, a base is arranged below the butt joint box, the butt joint box is communicated with the base, a cable channel is communicated with the base, and a cable penetrates through the cable channel.

The utility model has the advantages that: the ventilation and moisture-removing method adopted by the device for the cable head butt joint box is simple and practical, easy to implement, remarkable in effect and capable of reducing the risk of short-circuit accidents caused by excessive humidity in the butt joint box ideally.

Drawings

The present invention will be further described with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a perspective view of an embodiment of the present apparatus.

Wherein: 1. butt joint case, 2 ventilation room, 3 base, 4 cable trench cover, 5 cable trench, 6 cable, 7 case top, 8 ventilation seam, 9 ventilation opening, 10 roof, 11 fence, 12 ventilation window.

Detailed Description

The device adopts a specific method, the cable head butt joint box body is transformed, the ventilation and moisture removal functions are enhanced, the special cable communication wind room is specially designed, the local environment around the butt joint box is effectively changed, the moisture source is effectively reduced, the risk of short circuit and grounding accidents inside the butt joint box is reduced, and the safe operation of the butt joint box is ensured.

The method for ventilating and dehumidifying the cable head butt joint box by the device comprises two parts: firstly, the structure of the box body is improved. Secondly, a special ventilation room is additionally arranged. The two pipes complement each other, thereby achieving the expected effect.

Firstly, a ventilation scheme is enhanced for a butt joint box body. The method specifically comprises the following two aspects:

as shown in figure 1, a group of transverse ventilation seams are formed on the lower half portion of the four walls (one side of each door is a locked double-leaf door or single-leaf door) of the butt joint box and are formed through a sheet metal stamping process, and the upper portion of each seam is deformed into a transverse convex edge to prevent rainwater from flowing into the box body. The ventilation seam is longer and more than the size and the number of the existing common butt joint boxes so as to enhance the ventilation effect.

(II) as shown in figure 1, the top of the butt joint box is shaped like a pavilion roof or a triangular roof, and the slope is obvious and is about 45 degrees. Is manufactured by processes such as sheet metal welding and the like. The size of the bottom surface of the box top is larger than the transverse size of the box body, when the box top covers the box body, a 'eave' can be formed, a vent with a larger size is arranged below the eave for ensuring good ventilation, and the eave can also be used as an outer discharge port of condensed water on the top.

And secondly, manufacturing a small ventilation room above the cable trench beside the butt joint box.

Referring to fig. 1, a ventilation house is manufactured by a brick-concrete building method or composite plates, ventilation windows are formed in four walls and are blocked by iron nets or grids, a roof of the ventilation house is made of a rainproof and gradient material, the lower portion of the ventilation house is directly communicated with a cable trench, and the periphery of the ground of an external house foot is sealed by cement. The scheme simplifies constructors and materials to the utmost extent, achieves the function, does not need to be overlarge in size, and occupies an area with the width of the cable trench as the standard and the height of about 1 m. The lower edge of the ventilation window is about 20 centimeters away from the ground. The ventilation window is flexibly mastered according to the sizes of the four walls of the ventilation room and is as large as possible.

According to the technical scheme and referring to the description of the attached drawings, a manufacturer completes the manufacture of the junction box according to the requirements of the ventilation grating cracks on the side wall of the box body and the shape structure of the top cover (the manufacture is completed by the prior art by the processes of connecting the structure with internal insulation and a conductor, locking the door and the like, and the manufacture is not related to the scheme and does not need protection). And the butt joint box is conveyed to a construction area, a base is made of brick-concrete above the cable trench, the butt joint box is fixed above the base, the cable head can be made, and the butt joint box is lifted from the cable trench, enters the box body through the bottom of the butt joint box and is connected. The ventilation room is manufactured on the upper portion of the cable trench at the position of the 1 m distance from the butt joint box, and the ventilation room is manufactured by adopting a brick-concrete structure or cutting plates (such as composite layer color plates) according to the requirements provided by the technical scheme. The overall layout is as in fig. 2, so far, the overall embodiment is complete.

The device is technically characterized in that:

1. on the premise of keeping the basic insulation of the cable head butt joint box and the common scheme of the cable head joint mode, the ventilation modes of the side surface and the top of the box body are enhanced, and the opening degree with the outside is enlarged. And the two moisture removing methods are complementary to each other to enhance the effect by implementing the ventilation room special for the butt joint box close to the cable trench.

2. The side wall of the box body and the lower half part of the box door are provided with enough ventilation grids. The ventilation grids are a group of openings with transverse convex edges and downward gaps, and can prevent rainwater from flowing into the box body.

3. The case top is the "pavilion" shape top cap or "triangle-shaped roof" top cap that has showing the slope, and slope about 45 degrees, because slope effect, the top cap outside can not gather the rainwater, and inside moisture condensation drop also can water conservancy diversion to the top cap edge, passes through the opening of top cap and box lateral wall junction (under the eaves), arranges the external world. The junction of the top cover and the side wall of the box body, namely under the top cover brim, is provided with enough and big openings, so that rainwater cannot enter, but ventilation is good.

4. A small-sized special ventilation room is built above the cable trench close to the butt joint box by about one meter, bricks are mixed or composite boards are used for manufacturing, four walls are opened, windows are blocked by iron nets, the top cover of the ventilation room is made of rain-proof materials and has a slope, and the lower portion of the ventilation room is directly communicated with the cable trench. The size of the ventilation room is not required to be overlarge, and the occupied area is about 1 meter in height based on the width of the cable trench. The lower edge of the ventilation window is about 20 centimeters away from the ground. The ventilation window is flexibly mastered according to the sizes of the four walls of the ventilation room and is as large as possible.

The device starts from two aspects of butt joint case body and specially-designed special cable communication wind room, effectively changes butt joint case ventilation effect, changes peripheral local environment, effectively reduces the moist source, reaches the risk that reduces butt joint incasement portion and takes place short circuit, ground connection accident to guarantee its safe operation.

The above description is only for the specific embodiment of the present invention, but the structural features of the present invention are not limited thereto, and any person skilled in the art can make changes or modifications within the scope of the present invention.

Claims (3)

1. The utility model provides a power cable head is to connecing case and is dispelled damp device which characterized in that: the cable butt joint structure comprises butt joint boxes, ventilation rooms, cable trench cover plates and cable trenches, wherein the ventilation rooms are arranged on one sides of the butt joint boxes, cables are placed in the cable trenches, the cable trench cover plates are arranged on the cable trenches, the butt joint positions of cable heads are arranged in the butt joint boxes, box walls are arranged on the periphery of the butt joint boxes, box tops are arranged above the box walls, an opening is formed in one box wall, a box door is arranged at the opening, a ventilation seam is arranged on the box door, ventilation seams are arranged on the other three box walls, protruding eaves are outwards arranged on the upper portions of the ventilation seams, the box tops are triangular pyramid-shaped box tops, the included angle between the bottom edges of the triangular pyramid-shaped box tops and the inclined edges is 30-60 degrees, vertical connecting plates are welded below the bottom edges of the triangular pyramid-shaped box tops, horizontal connecting plates are welded at the other ends of the vertical connecting plates, and the connecting portions, the horizontal connecting plates are provided with air vents; the wall around the ventilation house is provided with a ventilation window, the ventilation window is provided with a fence, and the roof of the ventilation house is provided with a slope.

2. A power cable head-to-box moisture removal apparatus as claimed in claim 1, wherein: the slope of the roof of the ventilating house is 15-40 degrees.

3. A power cable head-to-box moisture removal apparatus as claimed in claim 1, wherein: the butt joint box is characterized in that a base is arranged below the butt joint box, the butt joint box is communicated with the base, a cable channel is communicated with the base, and a cable penetrates through the cable channel.

Images