CN212210398U

CN212210398U - Basement electrical cable inlet box

Info

Publication number: CN212210398U
Application number: CN202020319171.1U
Authority: CN
Inventors: 张谦; 张航; 闫江; 赵峰; 刘昊
Original assignee: China Shanxi Sijian Group Co Ltd
Current assignee: China Shanxi Sijian Group Co Ltd
Priority date: 2020-03-16
Filing date: 2020-03-16
Publication date: 2020-12-22
Anticipated expiration: 2030-03-16

Abstract

The utility model relates to a basement electrical cable inlet box, through the opposite direction analysis of "water toward low crossing stream", electrical cable advances when the basement, do not need to reserve the wall bushing in the subaerial below outdoor on the basement concrete wall, but set up the cable on the building wall body above ground and cross the line case, the bottom of the case is apart from ground to be not less than 1 meter, cross line case below building loose water slope peripheral hardware inspection shaft, will cross line case and inspection shaft intercommunication with suitable spool, just so can introduce the line case with the cable, lay the threading pipe downwards by crossing the line case again and draw forth to basement suitable position. Through the utility model discloses, can prevent that the rainwater that the ponding degree of depth is no longer than 1 meter from getting into the basement along the threading pipe, stop the rainwater and got into direct loss and indirect loss that the basement caused.

Description

Basement electrical cable inlet box

Technical Field

The utility model relates to an electric power protection technical field, more specifically say, relate to a basement electric cable inlet box.

Background

The majority of electrical cables entering and exiting the basement in a residential district are directly led into the basement through a wall along a buried pipeline, and a manhole well or a hand hole well (hereinafter, collectively referred to as an inspection well) is arranged according to specifications and design requirements. The arrangement of the inspection well facilitates threading, and creates conditions for rainwater to enter the basement. For many years, almost every building with basements has been deeply harmed. When an electrical cable is buried in and out of a basement, the common design method of a design institute is as follows: a wall bushing is reserved on the concrete outer wall of the basement about 0.7 m away from the outdoor ground, and a cable protection pipe (a threading pipe) which is buried and laid enters the basement through the wall bushing. After the threading pipe is laid in place, water-blocking plugs between the outer wall of the pipe and the wall bushing and water-blocking plugs at the pipe orifice of the threading pipe are manufactured. This is an ideal situation and theoretically not undesirable. In practical application, a construction unit usually neglects self plugging before threading of the threading pipe, or rainfalls suddenly without being plugged after being laid, or forgets to plug after threading, or is not tight in plugging, or is damaged in a buried pipeline, and all of the rainfalls can flow into a basement through a pipeline in an inspection well, so that unnecessary loss is caused.

In the prior art, there is an example of setting up basement wall cable waterproof structure, for example, current patent publication [ application number: 201620903557.0 title of the invention: the utility model provides a wall cable waterproof construction is worn to basement-.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide a basement electric cable inlet box.

The utility model provides a technical scheme that its technical problem adopted is: the electrical cable inlet box for the basement is constructed and comprises a cable passing box and a plurality of cable passing pipes; the wire passing box and the wire passing pipes connected with the wire passing box are embedded along with a civil structure, the wire passing box is a cubic box body, the distance between the bottom of the wire passing box and the ground is not less than 1 meter, and the distance between the top of the wire passing box and the ground is not more than 2 meters; the mechanical hole at the bottom of the box is provided with a threading pipe hole, and one end of each threading pipe passes through the hole at the bottom of the threading box and is fixed relative to the threading box; the other end of the cable is extended to an inspection well arranged outside the building, the cable is led into the cable passing box through the cable passing pipe, and the cable is further connected to the basement.

In the electrical cable inlet box of basement, the wire box is selected for use W H D =600 700 carbon steel box body 150 mm.

In the electrical cable inlet box of the basement, the threading pipe adopts one or more of DN25 type welded steel pipe, PC32 (A) type plastic electrical casing pipe and PC20 (A) type plastic electrical casing pipe.

Basement electric cable inlet wire case in, adopt mechanical trompil on crossing the line case box bottom plate, two rows are arranged around, the pipe hole is set for 50mm apart from the distance at box bottom plate edge, distance between the two adjacent pipe holes is set for 30 mm.

Basement electric cable inlet wire case in, stretch into the threading pipe bending radius who buries ground and lay in the inspection shaft and be not less than 10 times of threading pipe external diameter to do well the horn mouth in the wall of a well department of going out, the horn mouth position sets up buries the ground pipeline section under the bulk water slope, buries dark 300~500 mm.

Be different from prior art, the utility model provides a basement electrical cable inlet box, through the opposite direction analysis that "water flows toward low department", when electrical cable advances out the basement, do not need to reserve the wall bushing on basement concrete wall below outdoor ground, but set up the cable on the building wall body above ground and cross the line case, the bottom of the case is not less than 1 meter apart from ground, at line case below building scattered water slope peripheral hardware inspection shaft, with suitable spool will cross line case and inspection shaft intercommunication, just so can introduce the line case with the cable, lay the threading pipe downwards by crossing the line case again and draw forth to basement suitable position. Through the utility model discloses, can prevent that the rainwater that the ponding degree of depth is no longer than 1 meter from getting into the basement along the threading pipe, stop the rainwater and got into direct loss and indirect loss that the basement caused.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is the utility model provides a structural schematic diagram of basement electric cable inlet box.

Fig. 2 is the utility model provides a schematic view is used in installation of basement electric cable inlet box.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1, the utility model discloses a basement electric cable inlet box includes: a threading box 1 and a plurality of threading pipes 2; the wire passing box 1 and the wire passing pipes 2 connected with the wire passing box are embedded along with a civil structure, the wire passing box 1 is a cubic box body, the distance between the bottom of the wire passing box is not less than 1 meter, and the distance between the top of the wire passing box is not more than 2 meters; a mechanical hole is formed in the box bottom 11, a threading pipe hole 12 is formed in the mechanical hole, one end of each threading pipe 2 penetrates through the hole 12 in the bottom of the threading box 1 respectively and is fixed relative to the threading box 1; the other end extends to an inspection well 3 arranged outside the building, the electric cable is led into the wire passing box 1 through the wire passing pipe 2, and the electric cable is further connected to the basement.

In the electrical cable inlet box of basement, wire box 1 selects for use W X H X D = 600X 700X 150 mm's carbon steel box.

The maximum optical cable 96 core is selected, the outer diameter is about 17mm, the bending radius is 15 times, the coil diameter is 17 x 30 times =540mm, and a W x H x D =600 x 700 x 150 x 1.5mm common carbon steel box body can be selected by considering proper allowance.

For 96-core optical cables, 17mm x 1.5 times =25.5mm tube is adopted as the inner diameter of the tube. Common welded steel pipes can be adopted, the code is SC, and the specification is DN 25; other small diameter, weak current cables may employ DN25 tubing. The DN25 tube can also be replaced by a PC32 (A) type plastic electrical casing. The grounding wires of the wire passing box body are protected by a PC20 (A) type plastic electrical sleeve.

Mechanical holes are formed in a bottom plate of the box body, the front row and the rear row are arranged, 8 steel pipes DN25 are arranged in each row, and the wall thickness is 2.5 mm; the outer wall of the most edge of 1 PC20 pipe is 50mm away from the box body, the distance between the pipes is 30mm, the width of the box body is about 600mm, and the width of the box body is consistent with the width of the wire passing box selected according to the bending radius of the 96-core optical cable.

The threading box 1 and the threading pipe 2 connected with the threading box are pre-embedded along with the civil engineering structure. For the reserved holes with the side length of more than 300 x 300mm or the diameter of more than 300mm, the hole reinforcing ribs are arranged according to relevant regulations.

In the specific implementation process, two DN25 pipes are used for the entrance and the exit of the 96-core optical cable; two DN25 tubes are used for the cable television optical cable to pass in and out; six DN25 pipes are used for three-in-one in and out; other purposes reserve six DN25 tubes. The grounding wire of the box body is one PC20 pipe, one spare PC20 pipe and 18 PC pipes in total. The practical use proves that the weak current wire passing box of a common building has allowance for installing 9 the inlet and outlet pipes 9. 9 in 9 means 9 threading pipes 2 connected from the manhole 3 to the threading box 1 and 9 threading pipes 2 extending from the threading box 1 to each basement inside the building. It is arranged in two rows at the bottom of the wire passing box 1. The bending radius of a buried threading pipe 2 extending into an inspection well 3 from a threading box 1 is not less than 10 times of the outer diameter of the pipe, a bell mouth is made at the position of a well outlet, the buried pipe section under a water dispersion slope is buried by 300-500 mm, firstly, the water dispersion slope is protected, secondly, shallow points are buried for threading, and the pipe orifice of an SC cable protection pipe leading to the threading box cannot be soaked when a little water is accumulated in the inspection well, so that the corrosion can be effectively delayed. When the SC pipe is pre-buried, burrs at the pipe orifice are cleaned, and the inner wall and the outer wall of the buried pipe section are well made to be anticorrosive. The use of plastic electrical bushings is recommended in areas with high corrosiveness, such as coastal areas.

As shown in fig. 2, is the installation schematic diagram of the electrical cable inlet box of the basement of the present invention. During actual installation, the wire passing box 1 and the wire passing pipe 2 are poured and fixed in a building outer wall body, and particularly an outer wall body 6 close to the inspection well 3 and the water dispersion slope 4. The threading box 1 is positioned at the part of the outer wall body 6 contained in the ground building, and the threading pipe 2 extends from the bottom of the threading box 1 to the part of the outer wall body 6 contained in the underground building. The threading pipe 2 divide into inlet wire threading pipe 21 and the threading pipe 22 of being qualified for the next round of competitions, inspection shaft 3 and cross line case 1 are connected respectively to inlet wire threading pipe 21 both ends, the threading pipe 22 one end of being qualified for the next round of competitions connects line case 1, the other end extends to the basement cable outlet 7 that sets up on outer wall 6, outside cable run gets into inspection shaft 3 through buried line threading pipe 5, then get into inlet wire case 1 through inlet wire threading pipe 21, the rethread is qualified for the next round of competitions threading pipe 22, stretch out from basement cable outlet 7, for the basement provides electric power.

The utility model discloses a basement electrical cable inlet box sets up on outer wall 6 is located the wall body of ground building part, and highly be more than 1 meter apart from ground, through this setting, under the condition that precipitation is no longer than 1 meter, the rainwater can not get into wire box 1 through threading pipe 2, and the rainwater can not get into in the basement through threading pipe 2 that is arranged in carrying cable run to the basement promptly.

While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A basement electrical cable inlet box, characterized by comprising: a threading box and a plurality of threading pipes; the wire passing box and the wire passing pipes connected with the wire passing box are embedded along with a civil structure, the wire passing box is a cubic box body, the distance between the bottom of the wire passing box and the ground is not less than 1 meter, and the distance between the top of the wire passing box and the ground is not more than 2 meters; the mechanical hole at the bottom of the box is provided with a threading pipe hole, and one end of each threading pipe passes through the hole at the bottom of the threading box and is fixed relative to the threading box; the other end of the cable is extended to an inspection well arranged outside the building, the cable is led into the cable passing box through the cable passing pipe, and the cable is further connected to the basement.

2. The electrical cable entry box of claim 1, wherein the electrical cable entry box is a carbon steel box of W x H x D =600 x 700 x 150 mm.

3. The basement electrical cable inlet box of claim 1, wherein the conduit is one or more of a DN25 type welded steel tube, a PC32 (A) type plastic electrical casing and a PC20 (A) type plastic electrical casing.

4. The electrical cable inlet box for the basement as claimed in claim 1, wherein the bottom plate of the box body of the cable passing box is provided with mechanical holes, the mechanical holes are arranged in front and back rows, the distance between each hole and the edge of the bottom plate of the box body is 50mm, and the distance between every two adjacent holes is 30 mm.

5. The electrical cable incoming box for the basement according to claim 1, wherein the bending radius of the buried threading pipe extending into the inspection well is not less than 10 times of the outer diameter of the threading pipe, a bell mouth is made at the position of the outgoing well wall, the bell mouth is arranged at the position of a buried pipe section under a water-spreading slope, and the buried depth is 300-500 mm.