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Linear temperature sensing element with window on insulating layer

A technology on the insulating layer and the insulating layer, which is applied in the field of online temperature sensing elements, can solve the problems of difficult construction, no change in elasticity, and increased resistance value of itself and wiring points, etc., to achieve easy construction and installation, and good corrosion resistance , good softness effect

Active Publication Date: 2008-10-15
SURELAND IND FIRE SAFETY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But one of the disadvantages is that the detection conductor in this linear temperature sensing element has no change in its elasticity under normal conditions or in the alarm temperature environment, and is relatively hard and brittle, so it cannot withstand excessive pressure during installation and use. The mechanical external force, so the construction is difficult; the second disadvantage is that the detection conductor in this linear temperature sensing element is easy to rust, which will increase the resistance value of itself and the connection point, thereby greatly reducing the reliability of the alarm

Method used

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  • Linear temperature sensing element with window on insulating layer
  • Linear temperature sensing element with window on insulating layer
  • Linear temperature sensing element with window on insulating layer

Examples

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Effect test

Embodiment 1

[0018] Such as Figure 3 ~ Figure 4 As shown, the wire-type temperature sensing element provided with windows on the insulating layer provided by the present invention includes an outer sheath, two detection conductors 6, 7 and an insulation layer 8; wherein the two detection conductors 6, 7 are twisted The method is arranged in parallel inside the outer sheath, and at least one of them is a memory alloy wire; the insulating layer 8 is coated on the outer circumferential surface of any one of the two detection conductors 6, 7, and is located on the two detection conductors 6, 7. One or more windows 9 at intervals are formed on the stranded extruding surface between 7 . In the present embodiment, the thickness of the insulating layer 8 is 1 mm, and the detection conductor 7 wrapped inside the insulating layer 8 is a memory alloy wire, and the final temperature Af of the reverse martensitic transformation is set in the range of 50° C. to 100° C. The detection conductor 6 is a c...

Embodiment 2

[0022] This embodiment is an improvement on the basis of the first embodiment: that is, a semiconductor layer is arranged in parallel between the insulating layer 8 and the detection conductor 6 , and the semiconductor layer is coated on the detection conductor 6 in a conventional manner. When the linear temperature sensing element provided with a window on the insulation layer provided by the present invention is heated and reaches the end temperature Af of the reverse martensitic transformation set by the detection conductor 7, the detection conductor 7 will move from the window 9 on the insulation layer 8 to Protrude out so as to contact the semiconductor layer. At this time, the conversion box connected to one end of the linear temperature sensing element will output an alarm signal according to the change value of the electrical parameter (or sampled value) between the detection conductors 6 and 7 .

[0023] The semiconductor layer is selected from one of conductive rubber...

Embodiment 3

[0025] This embodiment is an improvement on the basis of Embodiment 2: that is, the detection conductor 6 adopts a thermocouple wire. Voltage or potential size for fire alarm.

[0026] Described thermocouple wire can adopt a kind of in metal materials such as constantan (copper-nickel), nickel silicon, tungsten, chemically pure iron, test copper, molybdenum, chemically pure copper, nickel chromium, nickel, platinum, silver, also Non-metallic materials such as graphite, silicon carbide, boron, and chromium oxide, or semiconductor materials such as N-type bismuth telluride and P-type bismuth telluride can be used.

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Abstract

A linetyped temperature perceptive component with windows mounted on the insulating layer is disclosed. It includes an oversheath, two detecting conductors and a insulating layer; two detecting conductors are mounted parallel in the inner oversheath by twisted type, and at least one of them is memory alloy thread; the insulating layer coats the outer periphery of arbitrary one of two detecting conductors, one or several spaced windows are formed on the twisted extruded surface between two detecting conductors. The linetyped temperature perceptive component with windows mounted on the insulating layer is heated to make the detecting conductor made of the memory alloy thread extend from the window according the characteristic, and contact with the detecting conductor mounted parallel to generate short circuit to reach the target of alarm. Because the wolliness of memory alloy thread is good, it's convenient to install, and it has high corrosion resistance, so the production has high reliability.

Description

technical field [0001] The invention relates to a linear temperature sensing element used in a linear temperature sensing detector, in particular to a linear temperature sensing element with a window on an insulating layer. Background technique [0002] The linear temperature sensing detector is a widely used fire detector, mainly composed of a linear temperature sensing element (also known as a detection cable) and a conversion box connected to one end of the linear temperature sensing element, and according to the According to the different structure, it is divided into two types: recoverable and non-recoverable. figure 1 and figure 2 They are the vertical partial structure and transverse cross-sectional view of the linear temperature sensing element in the traditional non-recoverable linear temperature sensor respectively. Such as figure 1 , figure 2 As shown, this traditional wire-type temperature sensing element includes an outer sheath 1; two detection conductors...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08B17/06G01K7/00H01B7/00
CPCG01K3/005G01K5/483
Inventor 张卫社李刚进
Owner SURELAND IND FIRE SAFETY
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