A Judgment System and Method for Running Signal of Steam-driven Feedwater Pump
A steam-driven feedwater pump and operating signal technology, which is applied in pump control, machine/engine, liquid variable capacity machinery, etc., can solve problems such as wrongly sending out a steam-driven feedwater pump stop signal
Active Publication Date: 2016-07-06
CHINA SHENHUA ENERGY CO LTD +2
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[0005] The purpose of the present invention is to provide a system and method for judging the operating signal of a steam-driven feedwater pump, which is used to solve the problem of incorrectly sending out the shutdown signal of the steam-driven feedwater pump due to failure or reset of the TSI system
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[0013] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0014] figure 1 It is a block diagram of the steam-operated feed water pump operation signal judgment system provided by the present invention, such as figure 1 As shown, the system includes four data acquisition devices, four logic judgment devices, two OR logic devices and one AND logic device.
[0015] The first to fourth data acquisition devices are all used to collect the rotational speed of the steam-driven feed water pump, and the first to fourth logic judgment devices are respectively connected to the first to fourth data collection devices in a one-to-one correspondence to judge the corresponding Whether the rotational speed collected by the data acqu...
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The invention discloses a system and method for judging the operation signal of a steam-driven feedwater pump. The system includes: first to fourth data acquisition devices; They are connected in a one-to-one correspondence, and are used to judge whether the collected rotational speed is lower than the preset rotational speed threshold; the first and second OR logic devices, the input terminals of the first OR logic device and the first and second logic devices The output terminal of the judging device is connected, the input terminal of the second or logic device is connected with the output terminals of the third and fourth logic judging devices; and the output terminal of the first and second or logic device is connected with the logic device. The invention can effectively prevent a steam-driven feedwater pump shutdown signal from being sent out by mistake due to failure or reset of a collection device, and greatly improves the reliability of the system.
Description
technical field [0001] The invention relates to a judging technology of an operating signal of a steam-driven water feed pump, in particular to a system and method for judging an operating signal of a steam-driven water feed pump. Background technique [0002] The fourth-stage steam extraction of the steam turbine drives the small steam turbine, and the rotation of the small steam turbine provides the power source for the steam-driven water pump. Generally, the speed adjustment range of the small steam turbine is 0-7000 rpm, and the safe operation of the steam-driven water pump The speed range is 2800-5800 rpm. If the speed of the steam-driven feedwater pump is lower than 2800 rpm, it can be determined that the power of the steam-driven feedwater pump is insufficient and a backup pump needs to be put into operation. [0003] The basis for most power plants to judge the tripping of the steam-driven feedwater pump is the closing signal sent by the main steam valve of the small...
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IPC IPC(8): F04B49/10
Inventor 张念东杨慎敏吴志刚张永
Owner CHINA SHENHUA ENERGY CO LTD