Portable type temperature sensing cable testing apparatus

Abstract

The invention discloses a portable type temperature sensing cable testing apparatus. The portable type temperature sensing cable testing apparatus is characterized by consisting of a flexible pipe and a hot airflow port, wherein the flexible pipe is a hollow dual-layer flexible pipe; an opening is formed in each of two ends of an inner pipe; two ends of an outer pipe are sealed; the hot airflow port is communicated with the outer pipe; through holes are distributed in an interface between the outer pipe and the inner pipe; and an opening-closing structure communicated with the inner pipe is arranged along the length direction of the flexible pipe. The flexible structure adopted for the portable type temperature sensing cable testing apparatus can be bent according to the layout of a field temperature sensing cable; in such a way, the implementation of a test can be facilitated; meanwhile, with the adoption of an airflow heating way, the heating can be enabled to be more even; and therefore, the burning loss of the temperature sensing cable is prevented.

Description

technical field [0001] The invention relates to a test device for testing the performance of an alarm detector, in particular to a test device for testing the performance of a temperature-sensing cable. Background technique [0002] Temperature-sensing cable, scientifically known as linear temperature-sensing fire detector, is a detection element used to detect temperature changes in the protected area. The temperature-sensing cable is usually twisted by two steel-core conductors extruded with negative temperature coefficient heat-sensitive insulating materials, which can detect temperature changes at any point along its installation length. Negative temperature coefficient heat-sensitive insulating material is such a special material. When the temperature rises, the resistance between the temperature-sensing cable cores decreases. When the temperature rises to the response value, the heat-sensitive insulating material of the temperature-sensing cable core melts, and the con...

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Problems solved by technology

[0005] However, when the temperature-sensing cables are used in the field, they are often fixed on the protected medium by bundling. The test device of the above-mentioned utility model has a rigid rectangular structure, which cannot be bent according to the layout of the on-site temperature-sensing cables, which leads to The test is difficult to carry out. In addition, in order to ensure that the temperature can be quickly transferred to the temperature-sensing cable, there is only one layer of perforated partition between the temperature-sensing cable and the heating element, or even direct contact, which makes the heating uneven and the temperature-sensing cable is burned. Damage happens from time to time

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