CN2549448Y

CN2549448Y - Multi-stage resettable linear temperature sensor against fire disaster

Info

Publication number: CN2549448Y
Application number: CN 02273243
Authority: CN
Inventors: 张陈; 曾学义; 王文江; 吴景华; 刘元博
Original assignee: 张陈
Priority date: 2002-05-28
Filing date: 2002-05-28
Publication date: 2003-05-07
Anticipated expiration: 2012-05-28

Abstract

The utility model provides a multi-stage resettable linear temperature sensor against fire disaster, which comprises a signal decoder, a terminal processor and a temperature sensitive cable arranged between the signal decoder and the terminal processor, and is characterized in that the inflaming retarding protective coat of the temperature sensitive cable at least comprises a temperature sensitive cable arrayed parallely upwards, and the periphery of the cable is filled with heat sensitive insulation material with negative temperature coefficient. By arraying the mutually twisted temperature sensitive cables parallely, the fire disaster sensor can simplify the processing technology of the cable, and cancels the special device for twisting the cables, thereby decreasing the device investment.

Description

Multistage renewable type line-type heat detector

Technical field

The utility model is a kind of fire detector, particularly a kind ofly can send response, and reusable line-type heat detector to more than one different temperature grade under control of microcomputer.

Background technology

In order in time to grasp fire and fire preventing, in a lot of buildings fire detector has been installed, at present comprising line type fire detector.Line type fire detector in the middle of great majority use now all is a beyond retrievable, and can only monitor a kind of temperature grade.So this fire detector uses very inconvenient, Wu Bao probability is higher simultaneously.Applicant of the present utility model once applied for a utility model patent; its patent No. is: 01241716; what this patent was protected is a line type fire detector that can recover formula; it has overcome the shortcoming of original line type fire detector; not only can reuse, and can monitor two temperature grades.Since in this patented technology, adopt four copper cores that twist together as exploration cable, thus the process more complicated of processing, and need specialized apparatus to process, cause the investment of equipment bigger.This in addition exploration cable does not have explosion-proof function.

Summary of the invention

The purpose of this utility model provides a kind of novel multistage renewable type line-type heat detector, and it can overcome sets forth existing shortcoming in the prior art, and it is easy to process, can reduce the investment of equipment, and has explosion-proof function.

The purpose of this utility model be achieved in that it comprise decoding signals, terminal handler and be connected in decoding signals and terminal handler between the responsive to temperature cable, it is characterized in that comprising the responsive to temperature cable that is arranged in parallel more than at least in the fire-retardant oversheath of responsive to temperature cable, around cable, be filled with the temperature-sensitive insulating material of negative temperature coefficient.

In the fire detector of the present utility model original mutual stranded responsive to temperature cable changed into and being arranged in parallel, can make the processing technology of cable obtain simplifying like this, the cost of product is reduced.The simplification of technology simultaneously helps keeping the stability of product quality, particularly keeps the homogeneity of negative temperature coefficient heat-sensitive insulating material between the core.The process equipment that does not need the required special use of twisted cable reduces the investment of equipment.

Description of drawings

The utility model is described in more detail below in conjunction with embodiment and accompanying drawing thereof.

Fig. 1 is the axial partial sectional view of first kind of example of responsive to temperature cable in the utility model.

Fig. 2 is the radially view profile of Fig. 1.

Fig. 3 is the axial partial sectional view of second kind of example of responsive to temperature cable in the utility model.

Fig. 4 is the radially view profile of Fig. 3.

Fig. 5 is the side sectional view of decoding signals.

Fig. 6 is the vertical view of Fig. 5.

Embodiment

By Fig. 1 and Fig. 2 as seen, having four responsive to temperature cables 1 to be arranged in parallel, is the right oversheath 2 of resistance in their outside, is filled with the temperature-sensitive insulating material 3 of negative temperature coefficient around the responsive to temperature cable.Present embodiment adopts that the negative temperature coefficient heat-sensitive insulating material of filling around will the responsive to temperature cable adopts integral extrusion, the job operation of the fire-retardant oversheath of extrusion molding processes then.In the process of extrusion molding processing, guarantee distance between each core by same mould, thereby make the insulation values between the core can keep stablizing.

Fig. 3 and embodiment shown in Figure 4 are on the basis of embodiment one, in the braiding of the outside of oversheath 2 or be wound with conductor material 4, play the effect of shielding.

By Fig. 5 and shown in Figure 6, the outer box of decoding signals comprises box body 5 and lid 6, fixedly connected between box body and the lid with screw 7, O-ring seal 8 is housed between box body and lid, the responsive to temperature cable enters in the box body by sealing double-screw bolt 9, be connected with circuit board 15 inner, between sealing double-screw bolt 9 and the box body O-ring seal 10 be housed also, make the inside and outside sealing state that keeps of decoding signals box body.An end that is used to connect the connection terminal 11 of power lead exposes the outside at box body, is connected with power lead by screw 12, and the other end is fixedlyed connected with circuit board 15 usefulness screws 14 in box body.

The decoding signals of present embodiment adopts the sealing box body, and sensitive cable at the seal box internal wiring, so can guarantee the insulation values of each core and circuit board, is prevented to produce the wrong report of fire.

Claims

1, multistage renewable type line-type heat detector, it comprise decoding signals, terminal handler and be connected in decoding signals and terminal handler between the responsive to temperature cable, it is characterized in that comprising the responsive to temperature cable that is arranged in parallel more than at least in the fire-retardant oversheath of responsive to temperature cable, around cable, be filled with the temperature-sensitive insulating material of negative temperature coefficient.

2,, it is characterized in that weaving or be wound with the conductor skin in the outside of oversheath according to the said detector of claim 1.

3, according to the said detector of claim 1, the box body that it is characterized in that decoding signals adopts hermetically-sealed construction, promptly between box body and lid O-ring seal is housed, the responsive to temperature cable enters in the box body by the sealing double-screw bolt and is connected with circuit board, between sealing double-screw bolt and box body O-ring seal is housed also.

4, according to the said detector of claim 1, it is characterized in that an end of the power supply terminal of decoding signals is connected with power lead outside box body, the other end is fixedlyed connected with circuit board by screw in box body.