CN201502401U - Cable Tunnel Automatic Drainage System - Google Patents

Abstract

The utility model relates to an automatic drainage system of a cable tunnel, which belongs to the field of drainage. A water collecting well (2) is arranged in the lowest position of the cable tunnel for collecting accumulated water in the well. Two submersible pumps of the submersible pump A (3) and the submersible pump B (4) are mounted in the water collecting well, a drainage pipe (6) of the submersible pump A (3) and a drainage pipe (7) of the submersible pump B (4) are connected with a main drainage pipeline (3) through a connecting pipeline (8) in a parallel connection way, and a high water level probe (9), a low water level probe (10) and a zero water level probe (11) are simultaneously arranged in the water collecting well (2). When the water level is low, the submersible pump A (3) is started for drainage, when the water level is high, the submersible pump B (4) is simultaneously started for drainage. The automatic drainage system is characterized by high degree of automation, timely drainage and large discharge capacity, thereby potentially ensuring the safety of cables in the tunnel.

Description

Cable Tunnel Automatic Drainage System

technical field

The utility model relates to the drainage field, in particular to an automatic drainage system for a cable tunnel.

Background technique

At present, the known drainage of cable tunnels adopts artificial drainage. And artificial drainage cannot solve the needs of a large amount of stagnant water and rainy day drainage at all. If the water volume is large or the drainage is not timely, it will cause harm to the cable tunnel and the facilities in the tunnel.

Contents of the invention

The technical problem to be solved by the utility model cable tunnel automatic drainage system is to overcome the deficiency of the existing cable trench drainage method: the problem that a large amount of accumulated water cannot be discharged in time, and the forced drainage system can discharge a large amount of accumulated water in time, Rainwater effectively guarantees the safety of the tunnel and internal equipment.

The technical solution adopted by the utility model to solve the technical problem is: a water collecting well is set at the lowest part of the cable tunnel, and the accumulated water will be concentrated in the well. Install two submersible pumps in the water collection well: submersible pump A and submersible pump B. If the water is large, they can be used at the same time to increase the displacement. Dig the cable tunnel and the main drainage pipe, and connect the cable tunnel and the main drainage pipe with a connecting pipe made of cement pipe. Then connect the outlet of the submersible pump to the main drainage pipe: the drainage pipe of the submersible pump A and the drainage pipe of the submersible pump B are connected in parallel with the main drainage pipe through the connecting pipe. Two high and low water level measuring points are set in the water collecting well, which are connected with the automatic opening system of the water pump. During the rising of the water level: When the water level reaches the position of the low water level probe, the submersible pump A starts. When the water volume is too large and one pump cannot complete the drainage task, the water level will rise. When the water level reaches the position of the high water level probe, the submersible pump B will be turned on. At this time, the two water pumps will drain water at the same time, and the accumulated water in the tunnel will be drained. In the process of water level drop: When the water level drops below the height of the low water level probe, the submersible pump B stops running. When the water level continues to drop below the height of the zero water level probe, the submersible pump A also stops running.

The beneficial effect of the utility model is that accumulated water and rainwater can be discharged in time, and the automatic control of the drainage system is realized.

Description of drawings

Figure 1 is a structural diagram of the cable tunnel drainage system.

Figure 2 is the wiring diagram of DF-96 automatic water level control.

Figure 3 is a wiring diagram of the TB-10 microelectric time-space switch.

In the figure: 1. Cable tunnel, 2. Collecting well, 3. Main drainage pipe, 4. Submersible pump A, 5. Submersible pump B, 6. Drainage pipe of submersible pump A, 7. Drainage pipe of submersible pump B, 8 .Connect the pipe, 9. High water level probe, 10. Low water level probe, 11. Zero water level probe.

Detailed ways

A water collection well (2) is set at the lowest point of the cable tunnel (1), and two submersible pumps are installed in the water collection well: submersible pump A (3) and submersible pump B (4). The cable tunnel (1) and the main drainage pipeline (3) are dug through, and the connecting pipeline (8) is made into a cement pipe to connect the cable tunnel (1) and the main drainage pipeline (3). Then connect the water outlet of the submersible pump to the main drain pipe: the drain pipe (6) of the submersible pump A and the drain pipe (7) of the submersible pump B are connected to the main drain pipe (3).

A high water level probe (9), a low water level probe (10) and a zero water level probe (11) are arranged in the water collecting well (2). E- is the high water level control point of the water collection well, the water level rises to the point E water level, the water contacts the high water level probe (9), and the water level controller automatically turns on the submersible pump B (7). D- is the low water level control point of the sump well, if the water level drops below the D point water level, the low water level probe (8) is out of contact with the water, and the water level controller automatically closes the submersible pump B (7). When the water level rose to point D, the low water level probe (8) was in contact with the water, and the water level controller automatically opened the submersible pump A (6). C- is the zero water level control point of the water collection well. When the water level drops below the water level of point C, the zero water level probe (11) is out of contact with the water, and the water level controller automatically turns off the submersible pump A (6), and points A and B are disconnected.

Wiring of direct control mode: The controlled electrical appliances are single-phase power supply, and the power consumption does not exceed the rated capacity of the switch (resistive load 25A), and direct control mode can be used.

Claims (3)

1. The cable tunnel automatic drainage system is characterized in that it includes a cable tunnel (1), a water collection well (2) set at the lowest point of the cable tunnel (1), submersible pump A (3), submersible pump B (4) Installed in the sump (2), the drain pipe (6) of the submersible pump A (3) and the drain pipe (7) of the submersible pump B (4) are connected to the connecting pipe (8), and the connecting pipe (8) is connected to the main drainage Pipeline (3) links to each other. 2. The cable tunnel automatic drainage system according to claim 1, characterized in that: the water collection well (2) is arranged at the lowest point of the cable tunnel (1). 3. The cable tunnel automatic drainage system according to claim 1, characterized in that: the connecting pipe (8) made of cement pipe is used to connect the cable tunnel (1) and the main drainage pipe (3).

Images