Device and method for detecting working state of nozzles in continuous-casting secondary cooling area in real time

Abstract

The invention discloses a device and method for detecting the working state of nozzles in a continuous-casting secondary cooling area in real time and belongs to the technical field of continuous casting production in the metallurgical industry. The device for detecting the working state of the nozzles in the continuous-casting secondary cooling area in real time comprises the nozzles and nozzle pipelines communicating with the nozzles correspondingly. Vibration detecting instruments are installed on the nozzles or the nozzle pipelines or other components fixedly connected with the nozzles only, and all the vibration detecting instruments are connected with an exchange board through cables. The exchange board is connected with a server in a wired mode or a wireless mode. The method for detecting the working state of the nozzles in the continuous-casting secondary cooling area in real time comprises the following steps that (A) datum vibration wave data are determined; (B) real-time vibration wave data are collected; (C) the vibration wave data are compared; and (D) the working state of the nozzles is judged. By the adoption of the device and method for detecting the working state of the nozzles in the continuous-casting secondary cooling area in real time, the detecting efficiency and accuracy of the working state of the nozzles in the continuous-casting secondary cooling area are improved.

Description

technical field [0001] The invention belongs to the technical field of continuous casting production in the metallurgical industry, and more specifically relates to a real-time detection device and method for the working state of a nozzle in a secondary cooling zone of continuous casting. Background technique [0002] Continuous casting is a production process in which molten steel is solidified from a liquid state into a billet in a steelmaking plant. In the secondary cooling section of this process, the billet needs to be cooled by spraying water. The water spray cooling equipment is composed of multiple fan-shaped sections, and multiple rows of nozzles are arranged on the fan-shaped sections. The working status of the nozzles directly affects the cooling effect of the slab. Uneven cooling of the slab will cause surface and internal quality defects of the slab, thereby affecting the quality of the slab. product quality. Specifically, when the nozzle is blocked, the surfac...

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Problems solved by technology

But this application also has the following deficiencies: although the continuous casting secondary cooling zone is divided into multiple loops for pressure and flow control, but because the number of nozzles in each loop is large, ranging from dozens to hundreds, the application is in It is difficult to judge when the number of clogged nozzles is small (because when the number of clogged nozzles is small, the comparison between the theoretical flow rate and the measured flow rate on the circuit is not obvious, and it is difficult to judge whether it is clogged), it is more suitable for the detection of large-scale clogged nozzles, and can only be judged For the clogging of nozzles in a circuit, it is impossible to accurately determine which nozzles in a circuit are clogged, and further inspection is required manually, which is time-consuming and laborious

However, the application still has the following deficiencies: (1) the application needs to be carried out under off-line conditions, and the working condition of the nozzle cannot be detected online, which affects the production continuity of the continuous casting secondary cooling zone; (2) the distance between the sensors It is a fixed value. During the test process, the relative position of the sensor and the nozzle in the secondary cooling zone cannot be accurately controlled, and the test results are prone to deviation; (3) The instrument is large in size and the sensor wire connection is intricate, which is not conducive to the maintenance and repair of the instrument

However, this application still has the following disadvantages: the application can judge the working status of each specific nozzle online, but the space near the nozzle in the middle of the sector is very narrow, the wireless temperature measuring device is difficult to install, and the temperature measuring position is far away from the nozzle. The slab is relatively close, and the life of the wireless temperature measuring instrument is limited under high temperature conditions, and the cost of installing the wireless temperature measuring instrument is relatively high

[0007] To sum up, in the prior art, the working status of the nozzle in the secondary cooling zone of continuous casting is mainly detected by collecting the parameters of nozzle flow, nozzle temperature and cooling medium pressure, but there are certain shortcomings

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