An automatic water injection device and control method for steam pressure-taking pipelines
A technology of automatic water injection and control method, applied in non-electric variable control, liquid level control, control/regulation system, etc., can solve the problems of affecting the measurement process, long waiting time, troublesome operation, etc., to improve safety and realize automation , to achieve the effect of simplicity
Active Publication Date: 2017-11-21
WISDRI ENG & RES INC LTD
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Problems solved by technology
The former is cumbersome and dangerous to operate; the latter takes too long to wait and affects the measurement process
Method used
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[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0026] Such as figure 1 As shown, the automatic water injection device for steam pressure-taking pipelines according to the present invention includes a controller 1, a water tank 2, a water pump 3, a two-position three-way solenoid valve 4, a pressure transmitter 5 and a flexible hose 6, The water injection port of the water tank 2 is connected to the water pump 3, the water pump 3 is connected to the medium inlet end of the two-position three-way solenoid valve 4, and one medium exit end of the two-position three-way solenoid valve 4 is connected to the pressure transmitter 5 and the bypass hose 6 connected, the other outlet of the two-position three-way solenoid valve 4 is connected to the water return port of the water tank 2; the controller 1 ...
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The invention provides an automatic water injection device and control method for steam pressure-taking pipelines. Reverse water injection is performed at the discharge port of the pressure pipeline; the control method uses the device to combine the least square method and mean square error to fit, calculate and compare the pressure data, distinguish various working conditions and execute the corresponding water injection process, and finally complete the steam extraction process. Accurate water injection of the pressure pipeline, the water injection process is divided into two ways: automatic water injection and manual water injection. The control method distinguishes four working conditions without steam pressure, with steady-state steam pressure, with regular change and irregular change of steam pressure, and executes the corresponding water injection process, and finally completes the accurate water injection of the steam pressure detection pipeline. It avoids high-altitude operations caused by personnel's water injection, which greatly improves safety. In addition to its automatic water injection control, it realizes the simplification and automation of water injection for steam pressure detection pipelines.
Description
technical field [0001] The invention relates to the field of automatic water injection device control, in particular to an automatic water injection device and a control method for steam pressure-taking pipelines. Background technique [0002] In the industrial production process, pressure transmitters, orifice plates and differential pressure transmitters are often used to detect steam pressure and flow. These detection methods need to use the pressure guide line to lead the steam pressure to the pressure measurement point of the pressure or differential pressure transmitter, such as figure 1 shown. Since the steam pipeline is often arranged at a high place, and the pressure or differential pressure transmitter is placed on the ground for maintenance convenience, the steam pressure guide line often needs to be led from high altitude to the ground, and the pressure taking port, condensation container, etc. Located at high altitude, while the transmitter, discharge valve, e...
Claims
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IPC IPC(8): G05D9/12
Inventor 张凯强健
Owner WISDRI ENG & RES INC LTD