Water level control system for cable tunnel

Abstract

The invention discloses a water level control system for a cable tunnel. The water level control system comprises a drainage ditch, a sump, a liquid level sensing assembly, a programmable controller,an alarm, a water suction pump and a flow proportional control valve. The first water pumping pipe is distributed along the bottom of the drainage ditch, a plurality of water pumping openings are formed in the first water pumping pipe at equal intervals, and when the programmable controller receives a drainage triggering signal, the flow proportional control valve is opened; when the programmablecontroller receives a water pumping trigger signal, a water pump is started; when the number of the transition trigger signals received by the programmable controller from the same section of the cable tunnel is increased, the programmable controller gradually instructs the flow proportional control valve to increase the flow proportion; when the programmable logic controller receives one transition trigger signal and does not receive the transition trigger signal sent by the adjacent transition liquid level sensor at the same horizontal height, the programmable logic controller controls the alarm to work, the drainage efficiency can be improved, an obstacle can be warned in time, and drainage is conducted on the drainage retardation section.

Description

technical field [0001] The invention relates to the technical field of water level adjustment systems, in particular to a water level control system for cable tunnels. Background technique [0002] A cable tunnel is a corridor or tunnel structure used to accommodate a large number of cables laid on cable supports. In addition to allowing the tunnel to better protect the cables, the cable tunnel can also make it easy for people to inspect and repair the cables. The entire tunnel should have drainage channels and must have automatic drainage devices. If there is seepage water in the tunnel, it will be concentrated in the sumps at both ends. When the water level reaches a certain level, the automatic drainage device will start, and the water will be discharged to the urban sewer with a drainage pump. [0003] But the existing water level control system has the following defects: [0004] (1) When there is occasionally a lot of water in the cable tunnel, such as in the summer...

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Problems solved by technology

[0004](1) When there is occasionally a lot of water in the cable tunnel, such as in summer when the rain is strong, sometimes the cable will be submerged for a short time. If the cable Being in a state of flooding for a long time will affect the service life of the cable and even pose a safety hazard. However, the existing drainage system mostly relies on the automatic discharge of accumulated water in the gutter, which makes the drainage progress difficult to cope with the sudden situation of more accumulated water. The drainage speed cannot be adaptively adjusted according to the depth of accumulated water in the tunnel, and the drainage efficiency is low;

[0005](2) In the cable tunnel, sometimes some obstacles are deposited, if not cleaned up in time, it will affect the normal drainage. The tunnel is regularly inspected to clean up internal obstacles. This method not only consumes manpower and material resources, but also cannot be cleaned up in time for temporary obstacles, resulting in obstacles blocking the flow of stagnant water;

[0006](3) Due to the long-term backflow carrying impurities in the drainage ditch, it is easy to form sediment at the bottom of the ditch. The common treatment method is to wait for the silt inside the drainage ditch to deposit When the thickness is certain, it should be cleaned regularly. This treatment method greatly reduces the daily drainage capacity of the gutter.

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