Teach you how to design weak integrated pipeline system?

The design of integrated piping for weak current systems is also a very important part. Learn simple things today.

System Overview

The weak current system is an integrated system project within a modern building. It is closely related to the electromechanical equipment of all buildings in the building, such as power distribution, air conditioning and lighting. These weak systems include building and equipment monitoring systems, security systems, card systems, satellite cable and video on demand systems, structured integrated cabling systems, LED and touch screen systems, multi-functional conference systems, computer rooms, power supplies, and lightning protection grounding systems. Background music and broadcasting systems.

The engineering design of the integrated pipeline includes the power supply, grounding, lightning protection, shielding, and the engine room for weak current embedded pipes, reserved holes, weak electric shafts, bridges, pipelines, and systems related to the entire weak current system. The design and construction of integrated pipelines also involves the relationship with other pipelines (such as HVAC, water supply and drainage, and high-voltage power), as well as the integrated piping or adjustment of building functions, and the laying of bridges for embedding.

In the weak current piping system of this proposal, all the weak current system lines except the fire protection system use the same bridge, and the bridge of weak current system piping should be considered as follows:

A. The fire protection system bridge is laid separately, and it forms a separate system and does not interfere with other systems.

B. The integrated cabling system transmits a large amount of data signals, so it needs strong anti-interference. At the same time, six types of cabling are used in the integrated cabling system, which requires a high construction process and a large amount of cables. It should also be a separate system. In the past, a large number of engineering practices proved that it is appropriate to separately set the weak bridge of the integrated wiring system.

C. Weak signals of several other subsystems Under the overall planning, a bridge can be used together to facilitate maintenance and management, and it is also convenient to isolate the power lines and signal lines of weak current systems.

Considering the combination of the above factors to facilitate maintenance and management, the main considerations are integrated wiring of a bridge, monitoring and other systems sharing a bridge, in addition to the two bridges, the need to set a separate bridge, so shared three sets Bridge.

Weak current pipeline vertical system design

Install three bridges in the weak electric tube well: one 400*200 trough bridge for the integrated wiring system cable; the other 300*150 for monitoring and other system cable runs; another 100*50 one bridge For the party political network voice points. The bridge is provided with a tie bar per meter to fix the vertical optical fiber, large logarithmic cable, six twisted pair cables from the floor to the management room, and other weak current lines. In satellite and cable TV systems, a 200*100*100 distributor box is placed between the weak currents in each floor of the main building and sub-buildings, as the installation box and line connection box of the amplifier and branch distributor, and the distributor box is installed in the weak current. Room.

After the vertical bridge is installed, the closing plate should be set in the weak electric well, closed normally, and opened when inspection or adding main lines.

Horizontal bridge design

A. Integrated wiring system

Because there are many information points on the apparent floor, we installed horizontal bridges in the ceilings of each floor. The size of the bridges is different depending on the number of information points in each system. It is mainly divided into three parts like the vertical part. : In addition to the party-government special network, the integrated wiring has taken a 200*100 horizontal bridge, and the monitoring part has also taken a 200*100 horizontal bridge, only a 100*50 bridge has been designed. The bridge should be installed close to the inside of the corridor. Because of the small space in the ceiling of the corridor and the distribution of pipelines, such as air-conditioning systems, water supply and drainage systems and strong electricity should be laid in the ceiling, the bridge to the information point for the DG20~DG25 conduit (2 six categories Line wear DG20, three six wire wear DG25), wire tube laying in the wall or ceiling, the module embedded box for the 86H50 iron box, installation height base bottom 30CM.

B, BA system

The DDC controllers are installed on every floor of the BA system. RS-485 cables are used between DDCs. Therefore, the ceiling and wall are laid with conduits below DG25. The DDC installation height is 1.5M from the vertical center. The BA system shares a bridge with the monitoring system.

C. Satellite and cable television systems

The horizontal pipes of the satellite and cable television system are taken from the weak level bridge and laid in the ceiling of the floor corridor. The cable television sets the distributor box between the weak layers of the cable and the junction box is installed in the ceiling. The junction box should have the corresponding cover plate. The junction box is used to install the branch distributor or wiring. The terminal from the branch box to each room is DG20~25 wire tube, the wire tube is laid in the wall or ceiling, the installation height is 30CM, and the embedded box is type 86H50. Iron box.

D. Other weak current systems

Since other weak current systems are distributed on the floor, they do not need to be arranged as a whole. The cable protection pipes are all covered with wire conduits below DG32, buried in ceilings or walls.

Weak room and management room design

Because the weak electricity room is the confluence of the weak electricity system and the management room, it is necessary to arrange the distribution of the pipes inside it and the location of the distribution box or control box. We installed a cabling standard cabinet and TV distributor box in the weak current room. All the weak current system wiring and branch lines were completed inside. A 400*200 bridge was laid in the weak shaft to connect the weak and horizontal bridges on each floor. There should be a grounding system in the weak current, and a 40*4 galvanized flat iron should be laid as a comprehensive grounding between the weak currents. The information points in the second-floor integrated wiring room are laid under the raised floor, so the laying method of the bridge is mainly ground floor channels.

Pre-construction inspection

According to the "Code for the Design of Architectural and Architectural Complex Cabling Systems Engineering" formulated by the China Engineering Construction Standardization Association, and the equipment inspection before construction, the materials, specifications and models of various profiles shall conform to the provisions of the design documents, and the surface shall be smooth and flat. Do not deform or break.

The pipe body used for the pipe should be smooth and free from damage, and the pipe hole should not be deformed. The hole diameter and wall thickness should meet the requirements.

The specifications and types of cables and optical cables used in the project shall meet the design requirements and the contract requirements.

Cable jacket should be complete, with a factory quality certificate.

device installation

The installation position of the bridge and channel shall comply with the provisions of the construction drawings, and the deviation shall not exceed 50mm.

Bridge and channel level deviation should not exceed 2mm/m.

Vertical bridges and channels shall be kept perpendicular to the ground. The deviation of verticality shall not exceed 2mm.

Cable laying

The cable should be laid flat, no twisting, looping, etc., and should not be squeezed and damaged by external forces.

The bend radius should be 6-10 times larger than the outer diameter, the main bend radius should be greater than 10 times the outer diameter, and the bend radius of the cable should be greater than 15 times the outer diameter.

Construction instructions

The bridge should be fixed on the wall (or under the ceiling) and the bridge should be fully sealed to prevent rat damage. The lid can be opened by a lock, and the bridges are connected by matching connecting pieces and bolts;

Metal bridges are used to place and guide the cables and provide mechanical protection. At the same time, it also provides a fireproof, sealed, and tight space so that the cable can be safely extended to the destination, and it is convenient for future maintenance and expansion. The bridge materials are all cold-rolled alloy plates with galvanized surface and are separated. Metal fire protection bridges; the total cross-sectional area of ​​the cable in the bridge does not exceed one-third of the cross-sectional area of ​​the bridge, and the filling rate of the wires in the metal wire conduit does not exceed 30%.

The pipeline construction unit is required to be able to ensure the possibility of cable laying in accordance with national standards, to remove burrs and rubbish from the pipe, and to keep guide wires required for threading in the pipe. In order to ensure smooth threading, the construction unit shall discharge The specification sets up the line box at the branch, connection and turn of the pipeline; according to the construction requirements of the integrated wiring system, the turning radius of each cable is required to be 8-10 times the outer diameter of the cable. Therefore, the bridge in the ceiling shall be set at 45 at the turn or at the junction. Corner (for 200 × 100 bridge, the 45-degree side length is 100mm; for the 300 × 150 bridge, the 45-degree side length is 150mm); in the corner of the pipeline can not turn corners, turning radius> 10cm;

The joints of the horizontal and vertical ladders and the joints of the horizontal and the pipelines shall be equipped with branch attachments of corresponding specifications. They shall not be disconnected to ensure the flexibility of the route and the safety of the lines. If the length of the pipelines is not enough, additional requirements shall be taken. When piping, jackets should be added, no inner sleeves can be added, and metal pipes can be used to connect the metal pipes in certain places. The inner diameter of the hose should not be smaller than the inner diameter of the iron pipes; all the bridges must be used after the cables are installed. Closed to prevent rat damage;

To ensure the safety of the line, the bridge frame should have a good ground. Metal bridges and metal hoses need to be integrally connected and grounded in this floor (strong protection ground). The cross-sectional area of ​​the grounding line is not less than 6 mm2. All thin-walled metal wire conduits are welded with wires and connected with the bridge. To prevent electromagnetic interference, the distance between the information cable line and the parallel direction of the strong power line cannot be less than the following:

The socket bottom boxes used this time are all GB 86 iron boxes. As the condition of office furniture is unknown, it is tentative that the bottom of all bottom boxes is 300mm from the ground.

The national standard 86 iron box shall be embedded in the wall of each information outlet. Each iron box and the pipeline in the wall shall be well connected and cannot be disconnected. The screw holes (ears) on the bottom box cannot be damaged, otherwise the panel cannot be installed. The information outlet must be more than 20cm away from the power outlet.