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Switching values recoverable cable type linear heat detector

A technology of temperature-sensitive detectors and switches, applied in electric switches, thermal switches, cables, etc., can solve problems such as non-recovery, and achieve high production efficiency, favorable processing technology, and reliable application

Active Publication Date: 2007-12-26
SHENYANG P T SECURITY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this detector is that it cannot be restored after the alarm, and the detector must be replaced

Method used

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  • Switching values recoverable cable type linear heat detector
  • Switching values recoverable cable type linear heat detector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0011] Embodiment 2, a cable-type temperature-sensitive detector with recoverable switching value, see Fig. 4 and Fig. 5, the two ends of the temperature-sensitive cable are respectively connected with the microcomputer modulator 5 and the terminal resistors R1 and R2 to form a closed-circuit signal acquisition circuit , which is characterized in that the structure of the temperature detector is: a metal conductor 1 is coated with an insulating material layer 2, and then a bimetallic sheet 3 is placed in parallel up and down, and finally an outer sheath layer 4 is extruded together. The bimetal sheet has at least one partially spherical convex surface per meter, and a needle-shaped contact is processed on each surface.

[0012] In the structures of Example 1 and Example 2, the metal conductor 1 is in the shape of a sheet strip or a circular or elliptical cross section. It is also possible to add more than one bimetallic sheet 3 in different directions outside the metal conduct...

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Abstract

A cable linear temperature sending detector enabling to restore switch capacity is prepared for making local spherical convex surface of bimetal plate be suddenly changed to be concave form when temperature is up to certain level, stabbing needle contact into insulation layer under action of force to make metal conductor and bimetal plate be short-circuited for realizing alarm function, restoring bimetal plate and temperature-sensing cable to be original state when temperature is decreased down to be on normal in order to realize function of being reutilized repeatedly.

Description

technical field [0001] The invention relates to a fire alarm device, in particular to a cable-type temperature-sensitive detector with recoverable switching value. technical background [0002] The traditional switching value linear temperature-sensitive fire detector currently used is a fire detector with a wide range of uses. Attached Figure 1 shows the structure and working principle of the traditional switching value linear temperature-sensitive detector. The two elastic conductors 1 are respectively coated with a plastic insulation layer 2 with a certain melting point, and then twisted together to cover the sheath layer 4. When the detector is heated, the temperature reaches the softening or melting of the sheath layer 4, and the Under the elastic force of the root elastic metal 1, a short circuit occurs between the two conductors, thereby achieving the purpose of alarming. The disadvantage of this detector is that it cannot be recovered after the alarm, and the detect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08B17/06H01H37/00H01B7/00
Inventor 张陈王文江
Owner SHENYANG P T SECURITY TECH