Static levelling instrument system having automatic water supplementing and draining functions

Abstract

The invention discloses a static levelling instrument system having automatic water supplementing and draining functions; an automatic water supplementing and draining device includes a water tank (3), a controller (4), a data acquisition assembly and an electromagnetic valve (5); the water tank (3) is connected to a static levelling instrument or a liquid passing pipe (2) through a communication pipe; the electromagnetic valve (5) is arranged on the communication pipe; the data collection assembly is connected with the sampling signal input end of the controller (4), and the control signal output end of the controller (4) is connected with a water supply pump and the electromagnetic valve (5). The liquid passing pipe (2) adopts a thickened liquid passing pipe. The system can achieve automatic detection of liquid levels and temperatures, is automatically compared with an experience value, achieves automatic water supplementing and draining, and is high in intelligent degree and convenient to use. The diameter of the liquid passing pipe is thickened, the resistance of a liquid in a liquid storage barrel flowing into the liquid passing pipe is greatly reduced, besides, the flow velocity of the liquid in the liquid passing pipe is ensured, the response speed of the static levelling instrument system is improved, and the dynamic measurement is achieved.

Description

technical field [0001] The invention relates to a static level system with the function of automatic replenishment and drainage. Background technique [0002] Static leveling system is a precision instrument for measuring the relative settlement between two or more points. It is mainly used for monitoring the vertical displacement and inclination of tunnels, dams, nuclear power plants, high-rise buildings, foundation pits, bridges, subways, etc. The static leveling system is generally installed on the measuring pier with the same height of the measured object or on the contour line of the wall of the measured object. The change of the liquid level changes synchronously. The liquid level of each liquid storage tank is measured by the displacement meter, so the liquid level change of each static level can be measured. [0003] The traditional static level system has the following two disadvantages: [0004] (1) After long-term use, the water in the static level system will c...

AI Technical Summary

Problems solved by technology

[0004] (1) After long-term use, the water in the static level system will continue to evaporate, and the liquid level in the liquid storage tank will continue to drop until it exceeds the range of the static level (the liquid level is too low and falls into the "dead zone"). If the displacement gauge exceeds the range, it will not be able to read the liquid level and the change of the liquid level normally, which will directly lead to the paralysis of the static level system, causing a huge safety hazard

This defect is particularly prominent in high temperature and dry environments

[0005] (2) The liquid pipe connected between the liquid storage tanks used in the traditional static level system is very thin. The diameter ratio of the liquid pipe is very large: on the one hand, the resistance of the liquid in the liquid storage tank flowing into the liquid pipe is relatively large, which directly affects the response speed of the static level system; on the other hand, the diameter of the liquid pipe is small, To a large extent, the flow rate of the liquid in the liquid pipe is limited, which will directly affect the response speed of the static level system

However, as the diameter of the liquid pipe increases, the body of the liquid pipe will be more affected by thermal expansion and contraction, and the volume of the liquid pipe body will expand when heated, which will greatly reduce the liquid level in the liquid storage tank, and it is easy to It exceeds the range of the static level (the liquid level is too low and falls into the "dead zone"); the body of the liquid pipe is cooled and shrinks, which will squeeze the liquid in the liquid pipe, causing the liquid level in the liquid storage tank to rise sharply. The range of the static level can easily be exceeded (fluid level is too high, falling into the "dead zone")

Once the range is exceeded, the displacement gauge will not be able to read the liquid level and the liquid level change normally, which will directly lead to the paralysis of the static level system, causing a huge safety hazard

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