Marine steam flow measuring device and method

Abstract

The invention provides a marine steam flow measuring device and method. The device comprises a flow measuring assembly and a flow converter, the flow measuring assembly is composed of a throttle pipesection, a pressure guide pipe, a valve set and a sensor assembly, connecting flanges are arranged at the two ends of the throttle pipe section, two ends of the throttle pipe section are connected with a steam pipeline, and the sensor assembly is provided with a pressure sensor and three differential pressure sensors with different measuring ranges and is connected to the throttle pipe section through the valve set and the pressure guide pipe; and the flow converter comprises a shell, a signal acquisition module, a signal processing module and a power module are arranged in the shell, a display screen is arranged on the front face of the shell, and a plurality of electric connectors are arranged on the two side faces of the shell and are connected with an external power source, the sensorassembly and an upper computer respectively. The straight pipe section of the flow measuring assembly is short, other special requirements of the straight pipe sections on the upstream and the downstream are avoided, and saturated steam measurement can be conducted in a narrow space of a ship.

Description

technical field [0001] The invention belongs to the technical field of steam flow measurement of ship steam pipelines, and in particular relates to a ship steam flow measurement device and method. Background technique [0002] In the marine steam system, it is necessary to accurately measure the steam flow in order to control the relevant pump and valve actions of the steam-water circulation loop to achieve the purpose of steam-water matching. The steam flow measurement device with orifice throttling is used. The steam flow is proportional to the square root of the upstream and downstream differential pressure of the throttle. When the steam flow is relatively low, it enters the measurement dead zone of the differential pressure sensor. At this time, the flow is Inaccurate, the meter shows only disturbance signals. Affected by the range range and measurement accuracy of the differential pressure sensor, the turndown ratio of using a throttle orifice to measure the flow rate...

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Problems solved by technology

In addition, the downstream and downstream of the orifice plate of the current steam flow measurement device has a certain length of the shortest straight pipe section requirement, but when the space of the ship cabin is relatively small and the layout of the steam pipeline system is relatively compact, the straight pipe section is relatively short, which is difficult to meet Installation requirements for throttling devices

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