Global overtemperature monitoring and temperature control auxiliary system for plate heater

Abstract

The invention relates to a global overtemperature monitoring and temperature control auxiliary system for a plate type heater. The system comprises an infrared global temperature measurement unit, an overtemperature control unit and a cooling unit; according to the infrared global temperature measurement unit, infrared camera shooting is adopted to carry out global temperature measurement on the heater; the overtemperature control unit identifies temperature acquisition data and carries out overtemperature alarm to realize auxiliary control of the operation of the heater; a cooling unit is connected to an original air source of a wind tunnel, and a blow-cooling ring and a blow-cooling nozzle achieve air flow on the surface of a heater shell and further achieve cooling of the heater shell. The infrared global temperature measurement unit comprises an infrared camera, a portal frame, a driver, a movable sliding rail and a real-time temperature detector, the portal frame is arranged on the movable sliding rail, and the portal frame is driven by the driver to slide along the movable sliding rail. According to the system of the invention, real-time temperature measurement can be carried out on the heater globally, so that safe use of the heater is ensured.

Description

technical field [0001] The invention relates to a global over-temperature monitoring and temperature control auxiliary system of a plate heater, which belongs to the technical field of wind tunnel tests. Background technique [0002] The wind tunnel plate regenerative heater is a device that works in a high temperature and high pressure environment, and the maximum internal temperature is about 800 degrees Celsius. Usually, the heater shell is composed of front and rear cylinders placed horizontally. Flanges are provided at both ends of the cylinder. Both the cylinder and the flanges are integrally forged and machined. Butt welding welds the flange to the shell. The manufacturing process of this kind of heater makes the connecting annular seam, the heat-proof insulation of the combustion chamber of the heater, and the front and rear connecting seams all very many, all of which are dangerous points with risk of strength after heating. [0003] Due to the frequent use of the...

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Problems solved by technology

Since the heater belongs to the early design, there is no over-temperature detection device, and the temperature measurement mainly depends on manual temperature measurement on the local point of the shell, which is not real-time measurement, and the human error is large and the uncertainty is large.

[0004] During multiple inspections, it was found that the welding part of the heater combustion chamber was in a high temperature state for a long time and there was a fracture.

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