CN2847405Y - Switch volume linear temperature seusing fire detecting cable based on memory alloy wire - Google Patents
Switch volume linear temperature seusing fire detecting cable based on memory alloy wire Download PDFInfo
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- CN2847405Y CN2847405Y CN 200520119064 CN200520119064U CN2847405Y CN 2847405 Y CN2847405 Y CN 2847405Y CN 200520119064 CN200520119064 CN 200520119064 CN 200520119064 U CN200520119064 U CN 200520119064U CN 2847405 Y CN2847405 Y CN 2847405Y
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- detecting
- memory alloy
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- alloy wire
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- 229910001285 shape-memory alloy Inorganic materials 0.000 title claims abstract description 45
- 239000004020 conductor Substances 0.000 claims abstract description 99
- 238000009413 insulation Methods 0.000 claims abstract description 8
- 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
- 229920002943 EPDM rubber Polymers 0.000 claims description 2
- 244000043261 Hevea brasiliensis Species 0.000 claims description 2
- 229920000459 Nitrile rubber Polymers 0.000 claims description 2
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 229920001903 high density polyethylene Polymers 0.000 claims description 2
- 239000004700 high-density polyethylene Substances 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229920000092 linear low density polyethylene Polymers 0.000 claims description 2
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 2
- 229920001684 low density polyethylene Polymers 0.000 claims description 2
- 239000004702 low-density polyethylene Substances 0.000 claims description 2
- 229920003052 natural elastomer Polymers 0.000 claims description 2
- 229920001194 natural rubber Polymers 0.000 claims description 2
- 229910001000 nickel titanium Inorganic materials 0.000 claims description 2
- -1 polypropylene Polymers 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 2
- 239000004800 polyvinyl chloride Substances 0.000 claims description 2
- 230000009471 action Effects 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 12
- 239000002184 metal Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 229910000734 martensite Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000012212 insulator Substances 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model relates to a switching value linear temperature-sensing fire detecting cable based on memory alloy wires. The utility model is characterized in that the utility model is composed of two detecting conductors, a fusible insulation layer, and an outer jacket, wherein the two detecting conductors are twisted together mutually; the fusible insulation layer is arranged between the two detecting conductors; the outer jacket is arranged on the outsides of the two detecting conductors; at least one of the two detecting conductors is the memory alloy wire. The utility model can improve the reliability of the action of the switching value linear temperature-sensing fire detecting cable.
Description
Technical field
The utility model relates to a kind of on-off value linear temperature-sensing fire detecting cable based on memory alloy wire, this is surveyed cable and adopts memory alloy wire as detecting conductor, this detecting conductor will destroy its insulation course automatically when in the environment that is in alarm temperature, produce alerting signal.
Background technology
The traditional on-off value linear temperature-sensing fire detecting cable that uses is a kind of broad-spectrum disaster detection cable at present, accompanying drawing 1 has shown the structure of traditional on-off value linear heat detection cable, survey in the cable at this, an oversheath 1 is arranged, there are two conductors 2,3 to twist together in this sheath, the conductor outside coats with the plastic layer 4,5 of certain melting point, when detection cable section is heated, after temperature acquires a certain degree, softening or the fusion of plastics, be in contact with one another between the conductor, promptly be short-circuited, thereby reach the purpose of fire alarm.The advantage of this detection cable is: after the temperature of any reaches the alarm temperature of setting arbitrarily on the detection cable; but survey all short-circuit alarmings of cable; it is irrelevant with the length of being heated to survey cable alarm sensitivity, and 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 heat detection cable 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 heat detection cable gets rusty easily, thereby has increased the resistance value of conductor and wiring point, has reduced the reliability of reporting to the police widely.For this reason, need to propose a kind of on-off value linear temperature-sensing fire detecting cable based on memory alloy wire.
Summary of the invention
The purpose of this utility model is to provide a kind of on-off value linear temperature-sensing fire detecting cable based on memory alloy wire, this conductor flexibility under conventional temperature range of surveying in the cable is fine, this conductor will return to the warning shape when in the environment that is in alarm temperature, automatically destroy its insulation course, produce alerting signal.
The purpose of this utility model is realized by following technical proposals: a kind of on-off value linear temperature-sensing fire detecting cable based on memory alloy wire, its main points are: be made up of two detecting conductors, fused insulating layer, oversheaths, described two detecting conductors are intertwined mutually, between described two detecting conductors, be provided with described fused insulating layer, described two detecting conductors outside is provided with described oversheath, and at least one detecting conductor is a memory alloy wire in described 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 range is good, be convenient to survey the installation of cable, this conductor will destroy its insulation course automatically when in the environment that is in alarm temperature, produce alerting signal, effectively reduced the false alarm of normal temperature test survey line cable itself.
2, because the memory alloy wire itself that the utility model adopts has corrosion resistivity, resistance value can great changes will take place during fire, can effectively reduce the false alarm of disaster detection cable under the high corrosion environment.
3, because the elasticity variation characteristic of the memory alloy wire that the utility model adopts itself, 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 of on-off value linear temperature-sensing fire detecting cable action greatly.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
The structural representation of Fig. 1, traditional on-off value linear heat detection cable
Fig. 2, temperature-sensing fire detecting cable structural representation of the present utility model
The structural representation of Fig. 3, the utility model embodiment two
Fig. 4, use heat detector structural representation of the present utility model
The structural representation of Fig. 5, the utility model embodiment three
The structural representation of Fig. 6, the utility model embodiment four
The schematic appearance of Fig. 7, the utility model embodiment four
The structural representation of Fig. 8, the utility model embodiment five
Embodiment
(accompanying drawing only shows the xsect of surveying cable referring to Fig. 2, vertical outside drawing of surveying cable omits), temperature-sensing fire detecting cable of the present utility model, form by two detecting conductors, fused insulating layer, oversheaths, described two detecting conductors 6,7 are intertwined (not showing among the figure) mutually, between described two detecting conductors, be provided with described fused insulating layer 8, described two detecting conductors outside is provided with described oversheath (not showing among the figure), and at least one detecting conductor is a memory alloy wire in described two detecting conductors.
In the present embodiment, the length of detecting conductor can be designed to 50 meters～200 meters, article two, in the detecting conductor one be the plain metal conductor, another is a memory alloy wire, this conductor can be hollow conductor, solid conductor or knitted conductor, article two, the fused insulating layer that is provided with between the detecting conductor can take to be coated on the lip-deep form of detecting conductor of plain metal, under this form, can take the combination of spiral winding between memory alloy wire and the detecting conductor, it twines pitch less than 1500 millimeters.
In the present embodiment, described metallic conductor can be common metal silk or conductive carbon fibre silk or carbon element elastic wire.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; Described fused insulating layer can be a kind of in low density polyethylene, high density polyethylene, linear low density polyethylene, polypropylene, polyvinyl chloride, natural rubber, nitrile rubber, the ethylene-propylene-diene rubber insulation course.The fusing point of fused insulating layer is 40 ℃～220 ℃ scopes.
(accompanying drawing only shows the xsect of surveying cable referring to Fig. 3, vertical outside drawing of surveying cable omits), the temperature-sensing fire detecting cable of the utility model embodiment two, article two, in the detecting conductor one be plain metal conductor 9, coat fused insulating layer 11 on this metallic conductor, article one, detecting conductor is that 10, two detecting conductor outsides of memory alloy wire are provided with insulation oversheath 12.Article two, detecting conductor in the shape of a spiral formula twist together, its twisting pitch is less than 1500 millimeters.Conductor in the utility model and insulator are relative conductor and relative insulator, and the resistivity that can be used in the normal temperature lower insulator is distinguished conductor and insulator with the ratio of the resistivity of conductor greater than 108.
In the present embodiment, 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 20 ℃～160 ℃ scopes, select to set, the conventional temperature range of present embodiment design is-40 ℃～40 ℃, when described detection cable is heated, its temperature rises thereupon, when temperature reaches memory alloy wire martensite reverse transformation finishing temperature A
fThe time, the martensite reverse transformation takes place in memory alloy wire 10, the elastic force that intensity increases and generation is very big, and return to original design shape (generally being rectilinear form), when temperature continuation rising reaches the softening or melt temperature of fused insulating layer 11, under the elastic force effect of memory alloy wire, two detecting conductor mutual extrusion, destroyed the fused insulating layer between two detecting conductors, two detecting conductors are realized electrically contacting, and promptly are short-circuited and report to the police.
Referring to Fig. 4, the figure illustrates an on-off value linear heat fire detector that uses embodiment two, survey in the cable two detecting conductors are arranged, article one, be plain metal conductor 9, coat fused insulating layer 11 on this metallic conductor, article one, detecting conductor be 10, two detecting conductors of memory alloy wire outside be provided with 12, two detecting conductors of oversheath in the shape of a spiral formula twist together.Article two, detecting conductor one end is electrically connected a terminal resistance 17 (its resistance value is value between 10 Ω～100M Ω), and the other end connecting resistance signal measurement apparatus 18 of two detecting conductors constitutes the on-off value linear heat fire detector.
(accompanying drawing only shows the xsect of surveying cable referring to Fig. 5, vertical outside drawing of surveying cable omits), the temperature-sensing fire detecting cable of embodiment three of the present utility model, article two, in the detecting conductor one be plain metal conductor 19, coat fused insulating layer 21 on this metallic conductor, another detecting conductor is a memory alloy wire 20, coats 22, two detecting conductor outsides of fused insulating layer on the memory alloy wire and is provided with oversheath 23.Article two, detecting conductor in the shape of a spiral formula twist together, its twisting pitch is less than 1500 millimeters.
Referring to Fig. 6, Fig. 7, this accompanying drawing has shown the temperature-sensing fire detecting cable of embodiment four, in this temperature-sensing fire detecting cable, have three detecting conductors, on two detecting conductors 25,26, coat fused insulating layer 27,28 respectively, twine 24, three detecting conductors of a memory alloy wire on these two detecting conductors and coat insulating sheath 29 outward.Wherein, the fusing point of fused insulating layer 27,28 (or softening) temperature range difference.When the temperature rising reaches the softening or melt temperature of first kind of fused insulating layer, under the elastic force effect of memory alloy wire, destroyed fused insulating layer therebetween, memory alloy wire is electrically connected with article one detecting conductor, promptly is short-circuited and carries out one-level and report to the police; When temperature continuation rising reaches the softening or melt temperature of second kind of fused insulating layer, under the elastic force effect of memory alloy wire, destroyed fused insulating layer therebetween, memory alloy wire is electrically connected with the second detecting conductor, promptly is short-circuited and carries out secondary and report to the police.
(accompanying drawing only shows the xsect of surveying cable referring to Fig. 8, vertical outside drawing of surveying cable omits) in embodiment five of the present utility model, one in described two detecting conductors is core shape conductor 30, another is a shell-like conductor 32, article two, detecting conductor is sleeved on and constitutes coaxial cable formula structure together, article two, be provided with fused insulating layer 31 between the detecting conductor, described core shape conductor is a memory alloy wire.In the present embodiment, the original design state of memory alloy wire is a sine wave shape, linear state under conventional temperature range.When described detection cable is heated, its temperature rises thereupon, the martensite reverse transformation takes place in memory alloy wire 30, memory alloy wire elastic force increases, and return to original design shape (sine wave shape), when temperature continuation rising reaches the softening or melt temperature of fused insulating layer 31, under the elastic force effect of memory alloy wire, two detecting conductor mutual extrusion, destroyed the fused insulating layer between two pieces detecting conductors, two detecting conductors are realized electrically contacting, and promptly are short-circuited and report to the police.
Claims (5)
1, a kind of on-off value linear temperature-sensing fire detecting cable based on memory alloy wire, it is characterized in that: form by two detecting conductors, fused insulating layer, oversheaths, described two detecting conductors are intertwined mutually, between described two detecting conductors, be provided with described fused insulating layer, described two detecting conductors outside is provided with described oversheath, and at least one detecting conductor is a memory alloy wire in described two detecting conductors.
2, on-off value linear temperature-sensing fire detecting cable according to claim 1 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; Described fused insulating layer can be a kind of in low density polyethylene, high density polyethylene, linear low density polyethylene, polypropylene, polyvinyl chloride, natural rubber, nitrile rubber, the ethylene-propylene-diene rubber insulation course.
3, on-off value linear temperature-sensing fire detecting cable according to claim 1 is characterized in that: coat fused insulating layer on the detecting conductor in described two detecting conductors.
4, on-off value linear temperature-sensing fire detecting cable according to claim 1 is characterized in that: coat fused insulating layer respectively on described two detecting conductors, twine a memory alloy wire on these two detecting conductors.
5, on-off value linear temperature-sensing fire detecting cable according to claim 1, it is characterized in that: one in described two detecting conductors is core shape conductor, another is the shell-like conductor, article two, detecting conductor is sleeved on and constitutes coaxial cable formula structure together, article two, be provided with fused insulating layer between the detecting conductor, described core shape conductor is a memory alloy wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520119064 CN2847405Y (en) | 2005-09-16 | 2005-09-16 | Switch volume linear temperature seusing fire detecting cable based on memory alloy wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520119064 CN2847405Y (en) | 2005-09-16 | 2005-09-16 | Switch volume linear temperature seusing fire detecting cable based on memory alloy wire |
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| Publication Number | Publication Date |
|---|---|
| CN2847405Y true CN2847405Y (en) | 2006-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520119064 Expired - Fee Related CN2847405Y (en) | 2005-09-16 | 2005-09-16 | Switch volume linear temperature seusing fire detecting cable based on memory alloy wire |
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| CN (1) | CN2847405Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100430967C (en) * | 2006-12-26 | 2008-11-05 | 首安工业消防有限公司 | Linear temperature sensing element equipped with fused insulating layer and pressure-sensitive rubber layer |
-
2005
- 2005-09-16 CN CN 200520119064 patent/CN2847405Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100430967C (en) * | 2006-12-26 | 2008-11-05 | 首安工业消防有限公司 | Linear temperature sensing element equipped with fused insulating layer and pressure-sensitive rubber 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 City, the 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 |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |