CN2921981Y - Linear temperature sensing element based on memory alloy filament - Google Patents
Linear temperature sensing element based on memory alloy filament Download PDFInfo
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- CN2921981Y CN2921981Y CN 200620113113 CN200620113113U CN2921981Y CN 2921981 Y CN2921981 Y CN 2921981Y CN 200620113113 CN200620113113 CN 200620113113 CN 200620113113 U CN200620113113 U CN 200620113113U CN 2921981 Y CN2921981 Y CN 2921981Y
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- memory alloy
- detecting
- linear temperature
- temperature sensor
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- 229910001285 shape-memory alloy Inorganic materials 0.000 title claims abstract description 52
- 239000004020 conductor Substances 0.000 claims abstract description 104
- 230000004888 barrier function Effects 0.000 claims description 13
- 239000000956 alloy Substances 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000013013 elastic material Substances 0.000 claims description 2
- 239000013536 elastomeric material Substances 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910001000 nickel titanium Inorganic materials 0.000 claims description 2
- 229920001169 thermoplastic Polymers 0.000 claims description 2
- 239000004416 thermosoftening plastic Substances 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 8
- 230000007704 transition Effects 0.000 abstract description 8
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 230000009466 transformation Effects 0.000 description 8
- 230000006872 improvement Effects 0.000 description 7
- 229910000734 martensite Inorganic materials 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 229910001566 austenite Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
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- Insulated Conductors (AREA)
Abstract
The utility model relates to a linear temperature sensing element based on memory alloy filament, comprising two detection conductors, which are arranged in parallel and intertwisting; at least one of the two detection conductors is memory alloy filament, and at least one of the two detection conductors is coated with an elastic insulating layer, which has a radial elastic window; the radial elastic window is arranged between the intertwisting and extruding surface of the two detection conductors. When fire occurs, the strain generated after the phase transition of the memory alloy filament is used to make the two detection conductors in short circuit, thereby generating the alarm signal to report fire; when fire is eliminated, the environmental temperature returns to the normal state, under the elasticity of the elastic insulating layer, making the two detection conductors return to the initial state, and preparing for alarming when fire occurs again. The linear temperature sensing element of the utility model can be repetitively used for alarming.
Description
Technical field
The utility model relates to a kind of linear temperature sensor based on memory alloy wire, this temperature sensing element is made up of two detecting conductors, elastic insulating layers, wherein at least one is memory alloy wire, utilizes the strain that takes place after the phase transformation of memory alloy wire to produce alerting signal report fire alarm.
Background technology
The traditional on-off value linear heat detection cable that uses is a kind of broad-spectrum fire linear temperature sensor at present, accompanying drawing 1 and accompanying drawing 2 have shown the structure of traditional on-off value linear temperature sensing element, in this temperature sensing element, an oversheath 1 is arranged, two elastic conductors 2 are arranged in this sheath, 3 twist together, conductor outside is with the plastic layer 4 of certain melting point, 5 coat, after on-off value linear temperature sensing element section is heated and is reached uniform temperature, softening or the fusion of plastics, be in contact with one another between the conductor, promptly be short-circuited, thereby reach the purpose of reporting fire alarm.The advantage of this linear temperature sensor is: after the temperature of any reaches the alarm temperature of setting arbitrarily on the linear temperature sensor; but linear temperature sensor is short-circuit alarming all; the warning sensitivity of linear temperature sensor is irrelevant with the length of being heated; therefore, the detection sensitivity of the fire that object of protection local overheating or external burning things which may cause a fire disaster are caused is very high.One of shortcoming be in this linear temperature sensor conductor no matter under normal circumstances or its elasticity is equally big, simultaneously harder, crisp when being in the environment of alarm temperature, in installing and using process, be afraid of very much mechanical external force, and difficulty of construction is big; Two of shortcoming is that the conductor of this linear temperature sensor gets rusty easily, thereby has increased the resistance value of conductor and wiring point, has reduced the reliability of reporting to the police widely; Three of shortcoming is can not reuse behind this linear temperature sensor fire alarm.For this reason, need to propose a kind of new reusable linear temperature sensor.
Summary of the invention
The purpose of this utility model is to provide a kind of linear temperature sensor based on memory alloy wire, having a strip conductor in this temperature sensing element at least is memory alloy wire, have at least one to coat elastic insulating layer in the conductor, the radial elastic window is set on this elastic insulating layer, the transformation stress that the utility model utilizes memory alloy wire to be heated to cause, two detecting conductors are short-circuited at radial elastic window place, thereby produce alerting signal; When temperature returns to normal value, make two detecting conductors return to state of insulation, report to the police during for breaking out of fire once more and prepare.
The purpose of this utility model is achieved through the following technical solutions: a kind of linear temperature sensor based on memory alloy wire, comprise two detecting conductors, described two detecting conductors become parallel stranded setting, have at least one to be memory alloy wire in described two detecting conductors, have at least one to coat elastic insulating layer in described two detecting conductors, the radial elastic window is set on this elastic insulating layer, and described elasticity window is arranged between the stranded compressive plane of two detecting conductors.
Compared with the prior art the utility model has following advantage:
1, because the utility model has adopted memory alloy wire as detecting conductor, this conductor flexibility under conventional temperature is good, be convenient to the installation of linear temperature sensor, when in the environment that is in alarm temperature, this detecting conductor is with automatic extruding radial elasticity window, two detecting conductors are short-circuited at radial elastic window place, produce alerting signal; Reduced the false alarm of linear temperature sensor itself under the normal temperature.
2, because the memory alloy wire itself that the utility model adopts has corrosion resistivity, when being in the corrosion environment for a long time, its resistance value can great changes will take place, can effectively reduce the false alarm of temperature sensing element under the high corrosion environment.
3, because the elasticity variation characteristic of the memory alloy wire that the utility model adopts itself, the elastic stress in the time of can improving it by the way that improves the memory alloy wire deflection and report a fire has improved the reliability that temperature sensing element moves greatly.
4, because the elastic property of the elastic body that the utility model adopts itself and the phase transformation of memory alloy wire itself can make linear temperature sensor reuse.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the structural representation of traditional on-off value linear temperature sensing element
Fig. 2 is the sectional drawing of traditional on-off value linear temperature sensing element
Fig. 3 is the structural representation of the utility model embodiment one
Fig. 4 is the cross sectional representation (the A-A cross section of Fig. 3) of the utility model embodiment one
Fig. 5 is an initialization view of the present utility model
Fig. 6 is an alarm condition synoptic diagram of the present utility model
Fig. 7 is the synoptic diagram that returns to form of the present utility model
Fig. 8 is the structural representation of the utility model embodiment two
Fig. 9 is the cross sectional representation of the utility model embodiment two
Figure 10 is the structural representation of the utility model embodiment three
Figure 11 is the cross sectional representation of the utility model embodiment three
Figure 12 is the structural representation of the utility model embodiment four
Figure 13 is the cross sectional representation of the utility model embodiment four
Figure 14 is the structural representation of the utility model embodiment five
Figure 15 is the cross sectional representation of the utility model embodiment five
Figure 16 is the structural representation of the utility model embodiment six
Figure 17 is the cross sectional representation of the utility model embodiment six
Embodiment
Embodiment one:
Referring to Fig. 3 and Fig. 4, temperature sensing element of the present utility model, comprise two detecting conductors, described two detecting conductors become parallel stranded setting, article two, having one in the detecting conductor at least is memory alloy wire, detecting conductor 7 is a memory alloy wire in the present embodiment, and detecting conductor 6 is conventional tinsel.Article two, have at least one to coat elastic insulating layer 8 in the detecting conductor, at least one radial elastic window 9 is set on this elastic insulating layer, described elasticity window is arranged between the stranded compressive plane of two detecting conductors.In the present embodiment, detecting conductor 6 coats elastic insulating layer 8, and the thickness of this elastic insulating layer is 1 millimeter, and the whole piece temperature sensing element can be provided with a plurality of elasticity windows, and the distribution density of elasticity window can be a 1-100/rice; The shape of elasticity window can be circle or rectangle, and the diameter of circular elasticity window is the 0.5-1 millimeter.The width of rectangular elasticity window is the 0.2-1 millimeter, and length can be the 1-10 millimeter.In the present embodiment, two detecting conductors are equidistant spiral way and twist together, and its twisting pitch is less than 1500 millimeters.
In the utility model, memory alloy wire flexibility under conventional temperature range is fine, in case surpass this phase transition temperature, it is very big that the intensity of memory alloy wire and rigidity will become.Conventional temperature range of the present utility model refers to memory alloy wire martensitic phase temperature range, its martensite reverse transformation finishing temperature A
fDesign load can in 5 ℃～100 ℃ scopes, select to set, the conventional temperature range of present embodiment design is-40 ℃～40 ℃, when detecting conductor was heated, its temperature rose thereupon, when temperature reaches memory alloy wire martensite reverse transformation finishing temperature A
fThe time, memory alloy wire generation martensite reverse transformation, intensity increases and produces very big elastic force, and returns to initial high temperature design shape, and the high temperature design shape adopts rectilinear form usually.
The principle of work of temperature sensing element of the present utility model is as follows:
Referring to Fig. 5 (only showing xsect of the present utility model), the utility model is in (under the Normal Environmental Temperature) under the initialization state, and elastic insulating layer has certain elasticity; memory alloy wire 7 does not undergo phase transition; better softness, two detecting conductors are in state of insulation, can not be short-circuited.
Referring to Fig. 6 (only showing xsect of the present utility model), the utility model is in the fire hazard environment, when temperature reaches memory alloy wire martensite reverse transformation finishing temperature A
fThe time, memory alloy wire generation martensite reverse transformation, rigidity improves, elastic force is undergone mutation, and returns to initial high temperature design shape, under the elastic force effect of memory alloy wire 7, article two, detecting conductor mutual extrusion, the radial elastic window is out of shape expansion thereupon, and two detecting conductors are realized electrically contacting, and promptly are short-circuited and report to the police.
Referring to Fig. 7 (only showing xsect of the present utility model), when fire extinguishing finishes, when the utility model environment recovery of living in arrives normal temperature, memory alloy wire undergoes phase transition, revert to martensite, under the elastic force effect of radial elastic window 8, memory alloy wire 7 recovers to the original position, and the state between two detecting conductors becomes state of insulation.
Embodiment two:
Referring to Fig. 8, Fig. 9, present embodiment is the improvement on the basis of enforcement one, and detecting conductor 11 is a memory alloy wire in the present embodiment, and detecting conductor 10 is conventional tinsel.Coat elastic insulating layer 12 on the detecting conductor, the thickness of this elastic insulating layer is 0.5 millimeter, and the width of elasticity window 13 is 1 millimeter.In order to improve the temperature sensing element reliability, outside described two detecting conductors, coat insulating sheath layer 14.This insulating sheath layer uses conventional material.
Embodiment three:
Referring to Figure 10, Figure 11, present embodiment is the improvement on embodiment one basis, comprise two detecting conductors, described two detecting conductors become parallel stranded setting, article two, having one in the detecting conductor at least is memory alloy wire, article two, have at least one to coat elastic insulating layer in the detecting conductor, at least one radial elastic window is set on this elastic insulating layer, described elasticity window is arranged between the stranded compressive plane of two detecting conductors, between described elastic insulating layer and described detecting conductor the NTC characteristic barrier layer is set.In the present embodiment, detecting conductor 19 is a memory alloy wire, and detecting conductor 15 is conventional tinsel, and detecting conductor 15 outsides coat NTC characteristic barrier layer 18, coat elastic insulating layer 16 in NTC characteristic barrier layer outside, offer a plurality of radial elastic windows 17 on the elastic insulating layer.Described NTC characteristic barrier layer is meant the plastic layer with negative temperature coefficient feature, belongs to conventional material, does not describe in detail.
The principle of work of present embodiment and embodiment one are similar, difference is: after memory alloy wire undergoes phase transition during breaking out of fire, detecting conductor 15 outer NTC characteristic barrier layer and detecting conductors 19 (being memory alloy wire) come in contact, article two, the electric signal parameter between the detecting conductor can raise with the temperature continuation and change, size according to electric signal parameter is carried out fire alarm, its alarm principle is referring to the Chinese patent instructions, and its patent No. is 200520119064.X.
Embodiment four:
Referring to Figure 12, Figure 13, present embodiment is the improvement on embodiment three bases, detecting conductor 19 is a memory alloy wire in the present embodiment, detecting conductor 15 is conventional tinsel, detecting conductor 15 outsides coat NTC characteristic barrier layer 18, coat elastic insulating layer 16 in NTC characteristic barrier layer outside, offer a plurality of radial elastic windows 17 on the elastic insulating layer.In order to improve the temperature sensing element reliability, outside described two detecting conductors, coat insulating sheath layer 20.
Embodiment five:
Referring to Figure 14, Figure 15, present embodiment is the improvement on embodiment one basis, comprise two detecting conductors, described two detecting conductors become parallel stranded setting, article two, having one in the detecting conductor at least is memory alloy wire, article two, have at least one to coat elastic insulating layer in the detecting conductor, at least one radial elastic window is set on this elastic insulating layer, described elasticity window is arranged between the stranded compressive plane of two detecting conductors, coats the NTC characteristic barrier layer on a described other detecting conductor.Detecting conductor 22 is a memory alloy wire in the present embodiment, and detecting conductor 21 is conventional tinsel.22 coat elastic insulating layer 23 in the detecting conductor, and a plurality of radial elastic windows 24 are set on this elastic insulating layer, coat NTC characteristic barrier layer 25 on the detecting conductor 21.The principle of work of present embodiment and embodiment one are similar, difference is: after memory alloy wire undergoes phase transition during breaking out of fire, detecting conductor 21 outer NTC characteristic barrier layer and detecting conductors 22 (being memory alloy wire) come in contact, article two, the electric signal parameter between the detecting conductor can raise with the temperature continuation and change, and carries out fire alarm according to the size of electric signal parameter.
Embodiment six:
Referring to Figure 16, Figure 17, present embodiment is the improvement on embodiment five bases, and detecting conductor 22 is a memory alloy wire in the present embodiment, and detecting conductor 21 is conventional tinsel.22 coat elastic insulating layer 23 in the detecting conductor, and a plurality of radial elastic windows 24 are set on this elastic insulating layer, coat NTC characteristic barrier layer 25 on the detecting conductor 21.In order to improve the temperature sensing element reliability, outside described two detecting conductors, coat insulating sheath layer 26.
Embodiment seven:
Present embodiment is the improvement on embodiment one basis, and a detecting conductor is a memory alloy wire in the present embodiment, and another detecting conductor is conventional tinsel.Article one, coat elastic insulating layer on the detecting conductor, a radial elastic window is set on this elastic insulating layer, described elasticity window is long and narrow strip window, and a plurality of long and narrow strip windows are provided with along detecting conductor is vertically equidistant.In the present embodiment, a plurality of long and narrow strip windows are that 10 millimeters at every interval is provided with one along the density that detecting conductor vertically is provided with, and the longitudinal length of its window is 8 millimeters; The width of window be the detecting conductor diameter 1/20～3/4 between.The long and narrow strip window of present embodiment also can be applied among the embodiment one to embodiment six.
Embodiment eight:
Present embodiment is the improvement on embodiment one basis, and a detecting conductor is a memory alloy wire in the present embodiment, and another detecting conductor is conventional tinsel.Article one, coat elastic insulating layer on the detecting conductor, a radial elastic window is set on this elastic insulating layer, described elasticity window is long and narrow strip window, this long and narrow strip window and the isometric setting of detecting conductor.The width of described window be the detecting conductor diameter 1/20～3/4 between, perhaps the width of window is 0.2 millimeter.The long and narrow strip window of present embodiment also can be applied among the embodiment one to embodiment six.
Memory alloy wire in the utility model can be a kind of in Ultimum Ti, NiTi copper memorial alloy, iron-based memorial alloy, the copper-based memory alloy material.(austenite end of a period phase transition temperature Af is 5 ℃-100 ℃).
Elastic insulating layer in the utility model can be a thermoplastic elastic material, also can be elastomeric material, also can be other macromolecular material of rubber-like.Elastomeric coating thickness is 0.1 millimeter～3 millimeters.
Radial elastic window on the elastic insulating layer in the utility model can obtain with the following method:
Mechanical system: earlier elastic insulating layer is coated on the detecting conductor, by mechanical means opening thereon;
High temperature open: under the austenite end of a period phase transition temperature of memory alloy wire, utilize the strain of memory alloy wire, on the elastic insulating layer that softens or melt, melt opening;
Mould openings: when elastic insulating layer coats detecting conductor, utilize coating mould in advance in the elastic insulating layer upper shed.In addition, can also adopt multiple opening mode, not be described in detail.
The stranded mode of two detecting conductors in the utility model can be two strands mutually, also can be one and be wrapped on another root, can also adopt conventional stranded mode.
Claims (10)
1, a kind of linear temperature sensor based on memory alloy wire, it is characterized in that: comprise two detecting conductors, described two detecting conductors become parallel stranded setting, have at least one to be memory alloy wire in described two detecting conductors, have at least one to coat elastic insulating layer in described two detecting conductors, at least one radial elastic window is set on this elastic insulating layer, and described elasticity window is arranged between the stranded compressive plane of two detecting conductors.
2, linear temperature sensor according to claim 1 is characterized in that: coat the insulating sheath layer outside described two detecting conductors.
3, linear temperature sensor according to claim 1 is characterized in that: between described elastic insulating layer and described detecting conductor the NTC characteristic barrier layer is set.
4, linear temperature sensor according to claim 3 is characterized in that: coat the insulating sheath layer outside described two detecting conductors.
5, linear temperature sensor according to claim 1 is characterized in that: coat the NTC characteristic barrier layer on a described other detecting conductor.
6, linear temperature sensor according to claim 5 is characterized in that: coat the insulating sheath layer outside described two detecting conductors.
7, linear temperature sensor according to claim 4 is characterized in that: described memory alloy wire can be a kind of in Ultimum Ti, NiTi copper memorial alloy, iron-based memorial alloy, the copper-based memory alloy material.
8, linear temperature sensor according to claim 4 is characterized in that: described elastic insulating layer can be a thermoplastic elastic material, also can be elastomeric material, also can be other macromolecular material of rubber-like.
9, linear temperature sensor according to claim 1 is characterized in that: described elasticity window is long and narrow strip window, and a plurality of long and narrow strip windows are provided with along detecting conductor is vertically equidistant.
10, linear temperature sensor according to claim 1 is characterized in that: described elasticity window is long and narrow strip window, this long and narrow strip window and the isometric setting of detecting conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620113113 CN2921981Y (en) | 2006-04-25 | 2006-04-25 | Linear temperature sensing element based on memory alloy filament |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620113113 CN2921981Y (en) | 2006-04-25 | 2006-04-25 | Linear temperature sensing element based on memory alloy filament |
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| Publication Number | Publication Date |
|---|---|
| CN2921981Y true CN2921981Y (en) | 2007-07-11 |
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| CN 200620113113 Expired - Lifetime CN2921981Y (en) | 2006-04-25 | 2006-04-25 | Linear temperature sensing element based on memory alloy filament |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008067690A1 (en) * | 2006-12-06 | 2008-06-12 | Weishe Zhang | A linear temperature-sensing element with windows on an insulating layer |
-
2006
- 2006-04-25 CN CN 200620113113 patent/CN2921981Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008067690A1 (en) * | 2006-12-06 | 2008-06-12 | Weishe Zhang | A linear temperature-sensing element with windows on an insulating layer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHOU AN INDUSTRY FIRE LTD. Free format text: FORMER OWNER: ZHANG WEISHE; PATENTEE Effective date: 20080627 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080627 Address after: BeiJing Capital Airport South Industrial Zone Banbidian Lee Road No. 22, zip code: 101304 Patentee after: Sureland Industry Fire-Fighting Co., Ltd. Address before: Beijing City, the Capital Airport South Industrial Zone Banbidian Lee Road No. 22, zip code: 101304 Co-patentee before: Li Gangjin Patentee before: Zhang Wei |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A memory alloy wire-based linear temperature induction element Effective date of registration: 20121010 Granted publication date: 20070711 Pledgee: Bank of America Ltd. Shanghai branch Pledgor: Sureland Industry Fire-Fighting Co., Ltd. Registration number: 2012990000591 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070711 |
|
| EXPY | Termination of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20171114 Granted publication date: 20070711 Pledgee: Bank of America Ltd. Shanghai branch Pledgor: Sureland Industry Fire-Fighting Co., Ltd. Registration number: 2012990000591 |