Fluid loss monitoring device and method

Abstract

The invention discloses a fluid loss monitoring device comprises an inner valve, a flow measuring device and a pressure intensity detecting element, wherein the inner valve is installed on the pipeline; the flow measuring device detects the flow of partial fluid between a terminal valve and the inner valve; the pressure intensity detecting element detects the pressure intensity of the inner side and the outer side of the inner valve; and a controller controls the inner valve according to a preset strategy. The preset strategy is as follows: when the detecting flow of the flow measuring device is less than a first preset value, the inner valve is closed; then whether the pressure intensity of the partial fluid between the terminal valve and the inner valve is lowered is determined according to a detecting signal of the pressure intensity detecting element; when the pressure intensity is determined to be lowered, the inner valve is opened; then whether the detecting flow of the flow measuring device is less than the preset threshold is determined again, and when the detecting flow of the flow measuring device is less than the preset threshold, the inner valve is closed and alarming is carried out. The fluid loss monitoring device can control the connection and disconnection of a pipeline according to the actual fluid flow accurately under the condition that low cost is kept. The invention also discloses a fluid loss monitoring method.

Description

technical field [0001] The invention relates to a fluid monitoring technology, in particular to a fluid loss monitoring device and a fluid loss monitoring method. Background technique [0002] In daily life and industrial production, appropriate pipelines are usually laid to control the flow direction of water, oil or other fluids. In order to facilitate control and meet the needs of actual life and production, valves are usually installed on the pipeline to control the flow of fluid; open the valve to allow the fluid to flow, and close the valve to stop the flow of fluid. Although the flow of fluid can be controlled through the valve, the valve has a certain sealing performance, and the valve sealing performance may be reduced due to wear after a period of use. Therefore, in the case where the sealing performance of the valve is deteriorated, even if the valve is closed, the fluid will flow through the valve, resulting in an abnormal loss of the fluid. [0003] In order t...

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Problems solved by technology

[0004] However, when the sealing performance of the valve is reduced, or the water flow is actively reduced for human reasons, the water flow through the water flow measuring device is very small, and the energy of the water flow is not enough to drive the impeller of the water flow measuring device to rotate, and the water flow measuring device cannot Measure the flowing water, resulting in inaccurate measurement of water flow; furthermore, the flow control device cannot control the on-off of the tap water pipe according to the actual water flow, resulting in abnormal loss of water

In the prior art, although it is possible to improve the manufacturing accuracy of the impeller of the water flow measuring device, reduce the energy required to drive the impeller to rotate, and reduce the starting flow rate of the water flow measuring device, this makes the manufacturing cost of the water flow control device Substantial increase, unable to meet actual needs

Chinese patent document CN202149794U (patent number: ZL201120277718.7) discloses another water flow measurement device, which reduces the initial flow of the water flow measurement device by concentrating the energy of the water flow to form a jet, but still requires an energy to drive the impeller Rotation, so that the starting flow of the flow measuring device cannot be further reduced

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