A three-dimensional layered cable feedthrough structure

Abstract

This utility model belongs to the field of water conservancy and hydropower construction, and specifically relates to a three-dimensional, layered cable delivery structure, including a cable outlet hole. A top plate divides the outlet hole into upper and lower sections. The lower section forms a high-voltage cable outlet channel, in which high-voltage cables are arranged. A partition wall is installed in the upper section, forming a left-right separated traffic channel and a smoke exhaust duct. Medium and low-voltage cables are arranged in the traffic channel. Ventilation holes are provided on the partition wall, and ventilation openings are provided on the top plate. The traffic channel connects to the smoke exhaust duct through the ventilation holes, and the smoke exhaust duct connects to the cable outlet channel through the ventilation openings. This design allows for multiple uses in one hole, ensuring safety, reliability, and cost savings.

Description

Technical Field

[0001] This utility model relates to a three-dimensional layered cable delivery structure, which is applicable to water conservancy, hydropower and other related industries. Background Technology

[0002] Underground powerhouses are a common type of power plant in the water conservancy and hydropower industries. These powerhouses are buried deep underground, while switchyards are typically located on the surface. High-voltage and medium-to-low-voltage cables in the underground powerhouse system need to be connected to the surface switchyard via safe and reliable channels. In previous layout schemes, dedicated channels were required for cable outgoing lines, preventing multi-purpose tunnels and increasing excavation volume. Furthermore, the rational layout of the cable outgoing channels not only affects the direct investment of the project but also directly impacts the reliable energy output and safe operation of the power plant. Therefore, a three-dimensional, layered cable outgoing structure is proposed to solve this practical engineering problem. Utility Model Content

[0003] The purpose of this utility model is to solve the problems existing in the background technology mentioned above, and to provide a three-dimensional layered cable delivery structure in which high-voltage cables and medium and low-voltage cables are arranged separately, one hole can be used for multiple purposes, it is safe and reliable, and saves investment.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A three-dimensional, layered cable delivery structure includes a cable outlet hole. A top plate is provided in the cable outlet hole to divide it into an upper and lower part. The lower part forms a high-voltage cable outlet channel, in which high-voltage cables are arranged. A partition wall is provided in the upper part to form a traffic channel and a smoke exhaust channel separated to the left and right. Medium and low-voltage cables are arranged in the traffic channel. Ventilation holes are provided in the partition wall, and ventilation openings are provided in the top plate. The traffic channel is connected to the smoke exhaust channel through the ventilation holes, and the smoke exhaust channel is connected to the cable outlet channel through the ventilation openings.

[0006] Furthermore, cable trenches are provided in the traffic lanes, and medium and low voltage cables are arranged in the cable trenches.

[0007] Furthermore, a drainage ditch is provided on the side of the cable trench outlet hole, a drainage pipe is pre-embedded in the drainage ditch, a base plate is provided at the bottom of the outlet channel, and drainage grooves are provided on both sides of the base plate, with the drainage pipe connected to the drainage grooves.

[0008] Furthermore, the high-voltage cable is arranged on both sides of the outlet channel.

[0009] Furthermore, a fireproof partition is installed in the outlet channel, a fireproof door is installed in the fireproof partition, and a fireproof valve is installed on the fireproof partition.

[0010] Furthermore, a concrete lining layer is provided on the lower half of the inner wall of the outlet hole.

[0011] Furthermore, the partition wall is made of lightweight fire-resistant material.

[0012] The advantages of this three-dimensional layered cable delivery structure compared to existing technologies are as follows:

[0013] 1. After the cable outlet is separated vertically and horizontally, the traffic passage, smoke exhaust passage and cable outlet passage are made independent. Medium and low voltage cables and high voltage cables are arranged independently, and traffic and smoke exhaust do not interfere with each other.

[0014] 2. The outlet tunnel can be used for multiple purposes, reducing tunnel excavation, saving project investment, reducing excavation waste, and being environmentally friendly;

[0015] 3. The high-voltage cable is arranged separately in the outgoing channel with reliable protection from concrete lining and top plate, ensuring high safety;

[0016] 4. Fireproof partitions effectively isolate high-voltage cables in sections, controlling accident losses. Ventilation vents are installed at the top of each partition section, allowing smoke to escape through upward-facing exhaust ducts, conforming to the general principles of smoke flow.

[0017] 5. Installing a lightweight fireproof partition wall between the traffic lane and the smoke exhaust duct can reduce the construction load on the top slab of the exit lane and facilitate construction. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the planar arrangement of a three-dimensional layered cable delivery structure according to this utility model;

[0019] Figure 2 yes Figure 1 A schematic diagram of section A-A;

[0020] Figure 3 yes Figure 1 A schematic diagram of the B-B section. Detailed Implementation

[0021] The present invention will be described in detail below with reference to specific implementation examples. The following implementation examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way.

[0022] like Figure 1 — Figure 3As shown, this utility model relates to a three-dimensional layered cable delivery structure, including a cable outlet 1. A top plate 2 is provided in the cable outlet 1 to divide the cable outlet 1 into an upper part and a lower part. The lower part forms a high-voltage cable outlet channel 3, in which high-voltage cables 4 are arranged. A partition wall 5 is provided in the upper part to form a traffic channel 6 and a smoke exhaust channel 7 separated to the left and right. Medium and low voltage cables 8 are arranged in the traffic channel 6. A ventilation hole 9 is provided on the partition wall 5, and a ventilation outlet 10 is provided on the top plate 2. The traffic channel 6 is connected to the smoke exhaust channel 7 through the ventilation hole 9, and the smoke exhaust channel 7 is connected to the cable outlet channel 3 through the ventilation outlet 10.

[0023] This design divides the cable outlet 1 vertically via the roof slab 2. The lower section serves as the outlet channel 3 for high-voltage cables, while the upper section is divided into a traffic channel 6 and a smoke exhaust duct 7 by partition walls 5. Medium and low-voltage cables are arranged within the traffic channel 6. Separating the high-voltage and medium / low-voltage cables effectively avoids electromagnetic interference and allows for multiple uses of the outlet, reducing excavation and saving on project investment. Ventilation vents 9 are installed on partition walls 5 for one-way ventilation from the traffic channel to the smoke exhaust duct, and ventilation openings 10 are installed on the roof slab 2 for one-way ventilation from the cable outlet 3 to the smoke exhaust duct. The smoke exhaust duct is used for daily ventilation and emergency smoke extraction. The upper part of the cable outlet can be permanently supported by shotcrete and anchor bolts, further saving on investment.

[0024] Furthermore, a cable trench 11 is provided in the traffic lane 6, and medium and low voltage cables are arranged in the cable trench 11. The cable trench can be constructed of brick or concrete, and a cover plate can be installed on the cable trench to enclose the medium and low voltage cables inside the cable trench, so as to simplify fire protection measures and facilitate personnel patrol and passage.

[0025] Furthermore, a drainage ditch 17 is provided on the side of the cable trench 11 outlet hole wall, and a drainage pipe 18 is pre-embedded in the drainage ditch 17. A base plate 15 is provided at the bottom of the cable outlet 3, and drainage channels 16 are provided on both sides of the base plate. The drainage pipe 18 is connected to the drainage channel 16. The drainage ditch 17 and the drainage pipe 18 can drain the seepage water from the upper rock mass and discharge it out of the hole from the drainage channel.

[0026] Furthermore, the high-voltage cable 4 is arranged on both sides of the outlet channel 3 to facilitate subsequent inspection and maintenance.

[0027] Furthermore, the cable outlet 3 is equipped with several fireproof partitions 12, each with a fireproof door 13 and a fire damper 14. The fireproof partitions are typically constructed of brick walls, with openings through which high-voltage cables pass. The gaps in the openings are sealed tightly with fire-resistant sealant. Fireproof doors are provided for personnel passage, and fire dampers are installed above the doors. The fire dampers are normally open to meet ventilation needs and close in case of an accident. In the event of an accident, the fireproof partitions can confine the accident to each small partition area, preventing the accident from escalating.

[0028] Furthermore, a concrete lining layer 19 is provided on the lower half of the inner wall of the outlet hole 1. The concrete lining structure has high rigidity and good waterproof performance, which can provide a safe and dry environment for the high-voltage cable.

[0029] Furthermore, the partition wall 5 is made of lightweight fireproof material, which facilitates construction and reduces the load on the top slab of the cable outlet.

[0030] The construction steps for the three-dimensional, layered cable delivery structure in this scheme include the following procedures:

[0031] 1. First, complete the excavation and support of the outlet tunnel. The cross-section of the outlet tunnel is generally a city gate shape, with a width of 4 to 6 meters and a height of about 5 to 7 meters, depending on the layout requirements.

[0032] 2. The concrete lining and roof slab of the construction outlet duct are typically 0.3~0.5m thick, and the roof slab is typically 0.15~0.25m thick. Both the lining and roof slab are generally reinforced concrete structures. An exhaust vent for the outlet duct is pre-reserved on the roof slab side near the exhaust duct.

[0033] 3. The concrete base slab of the construction exit channel is generally 0.2~0.3m thick. The base slab is generally made of plain concrete. Drainage channels are set on both sides of the base slab. The channel width is generally 0.2~0.3m and the channel depth is the same as that of the concrete base slab.

[0034] 4. Excavate drainage ditches and pre-bury drainage pipes in the tunnel (rock mass) adjacent to the cable trench;

[0035] 5. Construct lightweight fireproof partition walls and cable trenches in the traffic lanes on the top slab of the cable outlet. The cable trenches can be made of brick or concrete and can be covered with covers.

[0036] 6. Lay high-voltage cables in the outgoing cableway and medium- and low-voltage cables in the cable trench of the traffic lane.

[0037] 7. Fireproof partitions are constructed within the construction cable outlets, fireproof walls are built, fire doors and fire dampers are installed, and the holes and gaps where high-voltage cables pass through fireproof partitions are effectively sealed with fireproof sealant.

[0038] The above specific embodiments are used to explain and illustrate the present utility model, and are not intended to limit the present utility model. Any modifications and changes made to the present utility model within the spirit and scope of the claims shall fall within the protection scope of the present utility model.

Claims

1. A three-dimensional layered cable feed-through structure comprising a feed-through hole (1), characterized in that The outlet hole (1) is provided with a top plate (2) that divides the outlet hole into an upper part and a lower part. The lower part forms a high-voltage cable outlet channel (3). High-voltage cables (4) are arranged in the high-voltage cable outlet channel (3). A partition wall (5) is provided in the upper part to form a traffic channel (6) and a smoke exhaust channel (7) that are separated to the left and right. Medium and low voltage cables (8) are arranged in the traffic channel (6). A ventilation hole (9) is provided on the partition wall (5). A ventilation outlet (10) is provided on the top plate (2). The traffic channel (6) is connected to the smoke exhaust channel (7) through the ventilation hole (9). The smoke exhaust channel (7) is connected to the outlet channel (3) through the ventilation outlet (10).

2. The three-dimensional layered cable delivery structure as described in claim 1, characterized in that... Cable trenches (11) are set up in the traffic lane (6), and medium and low voltage cables are arranged in the cable trenches (11).

3. The three-dimensional layered cable delivery structure as described in claim 2, characterized in that... A drainage ditch (17) is provided on the side of the cable trench (11) outlet hole. A drainage pipe (18) is pre-embedded in the drainage ditch (17). A base plate (15) is provided at the bottom of the cable outlet (3). Drainage troughs (16) are provided on both sides of the base plate. The drainage pipe (18) is connected to the drainage trough (16).

4. The three-dimensional layered cable delivery structure as described in claim 1, characterized in that... The high-voltage cable (4) is arranged on both sides of the outlet channel (3).

5. The three-dimensional layered cable delivery structure as described in claim 1, characterized in that... A fireproof partition (12) is installed in the outlet channel (3), a fireproof door (13) is installed in the fireproof partition, and a fireproof valve (14) is installed on the fireproof partition.

6. The three-dimensional layered cable delivery structure as described in claim 1, characterized in that... A concrete lining layer (19) is provided on the lower half of the inner wall of the outlet hole (1).

7. A three-dimensional layered cable delivery structure as described in claim 1, characterized in that... The partition wall (5) is made of lightweight fireproof material.

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