CN200969134Y - Linetype temperature-sensitive detector with short circuit fault alarm - Google Patents
Linetype temperature-sensitive detector with short circuit fault alarm Download PDFInfo
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- CN200969134Y CN200969134Y CN 200620133478 CN200620133478U CN200969134Y CN 200969134 Y CN200969134 Y CN 200969134Y CN 200620133478 CN200620133478 CN 200620133478 CN 200620133478 U CN200620133478 U CN 200620133478U CN 200969134 Y CN200969134 Y CN 200969134Y
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- sensitive detector
- linear temperature
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Abstract
The utility model relates to a non recoverable streamlined heat sensitive detector with short trouble alerter and comprises a detecting cable, a resistance and a detector of resistance signal. Wherein, the detecting cable comprises at least two lines of paralleled detecting conductors and a melt processable insulating layer, and the detecting cable further comprises a semi conductor whose material layer is arranged between the detecting conductors together with the melt processable insulating layer to separate the detecting conductor. The detecting area of the utility model can distinct short trouble from fire disaster short circuit so as to eliminate the shortage of unable to distinct short trouble and fire disaster short circuit in existing detector. The utility model solves the problem of no short trouble alarm. The utility model also has the advantage of improving the reliability of fire disaster alarm of non recoverable streamlined heat sensitive detector.
Description
Technical field
The utility model relates to a kind of irrecoverable linear temperature-sensitive detector, particularly relates to a kind of irrecoverable linear temperature-sensitive detector with the short trouble warning.
Background technology
The traditional irrecoverable linear temperature-sensitive detector that uses is a kind of broad-spectrum fire detector at present.Figure 1 and Figure 2 has gone out the detection cable of traditional irrecoverable linear temperature-sensitive detector and has surveyed the sectional view of cable.In the detection cable of this detector, a sheath 1 is arranged, there are two in this sheath (or more than two, as three, four etc.) detecting conductor 3 twists together, detecting conductor can be elastic conductor, as memory alloy wire etc., the detecting conductor outside coats with the plastic layer 2 that certain melting point or fusing point are arranged, when exploration cable is heated, after temperature acquires a certain degree, the softening or thawing of plastic layer, under the elastic force effect of elastic conductor (or memory alloy wire), be in contact with one another between the conductor, promptly be short-circuited, thereby reach the purpose of fire alarm.The advantage of this detector is: after the temperature of any reaches the alarm temperature of setting arbitrarily on the exploration cable, but exploration cable is short-circuit alarming all, detector alarm sensitivity is irrelevant with the length of being heated, 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; Simultaneously, when detector wherein a detecting conductor opens circuit the time, also can carry out fault alarm.Shortcoming is that this heat detector does not have the short trouble warning function, has only the fire alarm function under the short-circuit conditions, and short trouble and short circuit fire alarm can't be distinguished.Therefore, need a kind of can the distinguish short-circuit fault with the fire short circuit, the irrecoverable linear temperature-sensitive detector of band short trouble warning.
Summary of the invention
The purpose of this utility model is to provide a kind of irrecoverable linear temperature-sensitive detector with the short trouble warning, this detector energy distinguish short-circuit fault and short circuit fire alarm, thereby can carry out short trouble respectively to different situations reports to the police and fire alarm, solve the shortcoming that irrecoverable linear temperature-sensitive detector does not have short trouble to report to the police in the prior art, improved the reliability of irrecoverable linear temperature-sensitive detector.
The purpose of this utility model is realized by following technical proposals: a kind of irrecoverable linear temperature-sensitive detector with the short trouble warning, described line-type heat detector comprises the detection cable, resistance, with the resistance signal measurement mechanism, described detection cable comprises at least two parallel detecting conductor and fused insulating layers that are provided with, it is characterized in that: described detection cable further comprises semiconductor layer, wherein, described semiconductor layer and fused insulating layer are arranged between the described detecting conductor, separate described detecting conductor.
In the utility model, the detection cable of irrecoverable linear temperature-sensitive detector also further comprises conductive layer, is arranged between described semiconductor material layer and the described fused insulating layer, and is parallel with described semiconductor material layer and described fused insulating layer.Described conductive layer is interrupted conductive layer or continuous conducting layers, and interrupted conducting or continuous conducting are provided.Described conductive layer can be by tinsel, nonmetal wire, and sheet metal, metallic foil, the open column shape metallic sheath, conducting resinl, or electrically-conducting paint is made.
Irrecoverable linear temperature-sensitive detector of the present utility model also comprises sheath, is coated on outside the described detection cable.
Irrecoverable linear temperature-sensitive detector in the utility model, at least one is elastic conductor in the described detecting conductor.Described elastic conductor is elastic wire or memory alloy wire.The design load of the martensite reverse transformation finishing temperature Af of described memory alloy wire is in 20 ℃～140 ℃ scope.
In Irrecoverable type line-type heat detector of the present utility model, described semiconductor layer is at least by a kind of the making in PTC, CRT, NTC, conductive rubber, the conductivity ceramics.The temperature of fusion of described fused insulating layer is at 40 ℃～180 ℃.Described fused insulating layer is at least by a kind of the making in wax, naphthalene anthracene, stearic acid, rosalin, low density polyethylene, high density polyethylene, polypropylene, the polyvinyl chloride.
Compared with prior art, detector of the present utility model is to increase the layer of semiconductor material layer between the conductor of the two poles of the earth of existing irrecoverable linear temperature-sensitive detector, make the detection cable resistance value difference that under different situations, measures, thereby short trouble and fire short circuit are distinguished
Having eliminated existing detector can't the distinguish short-circuit fault and the shortcoming of short circuit fire alarm both of these case, solved the problem that irrecoverable linear temperature-sensitive detector does not have short trouble to report to the police in the prior art, simultaneously, irrecoverable linear temperature-sensitive detector of the present utility model also can provide functions such as open circuit fault, thereby makes irrecoverable linear temperature-sensitive detector of the present utility model have very high reliability.
Description of drawings
Fig. 1 illustrates the synoptic diagram that traditional irrecoverable linear temperature-sensitive detector is surveyed cable;
Fig. 2 illustrates the synoptic diagram that traditional irrecoverable linear temperature-sensitive detector is surveyed the cable cross section;
Fig. 3 illustrates the synoptic diagram of surveying the cable xsect according to the irrecoverable linear temperature-sensitive detector of an embodiment of the utility model;
Fig. 4 illustrates the synoptic diagram of surveying the cable longitudinal section according to the irrecoverable linear temperature-sensitive detector of an embodiment of the utility model;
Fig. 5 illustrates the schematic equivalent circuit of irrecoverable linear temperature-sensitive detector of the present utility model; With
Fig. 6 illustrates the synoptic diagram of the irrecoverable linear temperature-sensitive detector detection cable xsect of another embodiment of the utility model.
Embodiment
Below in conjunction with accompanying drawing, describe heat detector of the present utility model in detail.
Beyond retrievable linear Controller in Fire Alarm Temperature Detector of the present utility model comprises the detection cable, also comprises resistance and electric signal measurement device etc., surveys cable and comprises two detecting conductors, is arranged on two semiconductor layer and fused insulating layers between the detecting conductor.Fig. 3 illustrates the linear temperature sensor of beyond retrievable linear Controller in Fire Alarm Temperature Detector of the present utility model, and as surveying the synoptic diagram of cable part xsect, Fig. 4 illustrates the synoptic diagram of surveying the cable longitudinal section.As shown in Figure 3 and Figure 4, in beyond retrievable linear Controller in Fire Alarm Temperature Detector of the present utility model, survey cable and comprise that two detecting conductors 4,5 are arranged on two semiconductor material layer 7 and fused insulating layers 6 between the detecting conductor.Beyond retrievable linear Controller in Fire Alarm Temperature Detector of the present utility model also comprises resistance R 2 and electric signal measurement device 9, as shown in Figure 5.In the utility model, two detecting conductors 4 and 5 are parallel settings, that is, advance side by side.Parallel setting can comprise coaxially and to be provided with, and also can comprise being arranged to parallel to each otherly, or twine mutually, or the like.Semiconductor layer 7 and fused insulating layer 6 are arranged between two detecting conductors 4 and 5, walk abreast with detecting conductor 4 and 5, separate this two detecting conductors, and the temperature of fusion of fused insulating layer can be preferably at 40 ℃～180 ℃.
Fig. 5 is the equivalent circuit diagram that line style Controller in Fire Alarm Temperature Detector of the present utility model is shown.As shown in Figure 5, beyond retrievable linear Controller in Fire Alarm Temperature Detector of the present utility model comprises resistance R 2, with electric signal measurement device 9, detecting conductor 4 and 5 equivalences are lead 10 and 11, fused insulating layer 6 equivalences are the K switch among the figure, 7 equivalences are the resistance R 1 among the figure with semiconductor material layer, wherein, resistance R 2 is the terminal resistance of linear temperature sensor, and its value is preferably 1k Ω～20M Ω, and the signal input part of resistance signal measurement mechanism 9 is electrically connected with an end of detecting conductor, resistance R 2 links to each other with the other end of detecting conductor, that is, electric signal measurement device 9 is connected on an end of linear temperature sensor, and resistance R 2 is connected on the other end.
Under the normal operation, promptly, there is not fire, do not have under the situation of fault yet, just fused insulating layer is excellent, separates under the situation of detecting conductor with semiconductor material layer, and at this moment K switch does not have closure, the result that 9 pairs of linear temperature sensors of electric signal measurement device are measured is that resistance value R is the resistance of resistance R 2, i.e. R=R2.
When open circuit fault occurring, open circuit as the linear temperature sensor somewhere, as in two detecting conductors of detector at least one open circuit etc., this moment, fused insulating layer may still remain intact, still separate detecting conductor with semiconductor material layer, that is: the K switch that is equivalent among Fig. 5 does not have closure, opens circuit but lead 10,11 and resistance R 2 form the circuit somewhere.Therefore, this moment, the electric signal measurement device was that its resistance value R is infinity, i.e. R=∞ to the result who surveys the cable measurement.At this moment, electric signal measurement device 9 sends the open circuit fault signal, carries out open circuit fault and reports to the police.
When short trouble occurring, as not having under the situation of fire, complete conductor contact appears somewhere between two detecting conductors of detector detection cable, short trouble promptly appears, when being equivalent among Fig. 5 lead 10,11 and resistance R 2 and forming the circuit somewheres and be short-circuited, at this moment, fused insulating layer may still remain intact, K switch does not have closure among Fig. 5, but because short circuit, so the electric signal measurement device, is promptly surveyed the resistance R result of cable measurement to linear temperature sensor and is approximately zero, promptly R ≈ 0.At this moment electric signal measurement device 9 sends the short trouble signal, carries out short trouble and reports to the police.
When breaking out of fire, promptly, when the linear temperature sensor of detector is heated, its temperature rises thereupon, is heated at detector line style temperature sensing element, when temperature raises the softening temperature zone that reaches fusible insulation course, fusible insulation course fusing, softening or melt, two detecting conductors have been eliminated detector and have been surveyed fused insulating layer between two detecting conductors of cable heated portion under the elastic force effect.This is equivalent to the fused insulating layer fusing of the linear temperature sensor of part shown in the number in the figure 8, the K switch closure at 8 places in the equivalent electrical circuit of Fig. 5.At this moment, still have semiconductor material layer between two detecting conductors of detector heated portion, this part can equivalence be the resistance R 1 at 7a place among Fig. 5, then the value of the resistance R of electric signal measurement measurement device is by equivalent resistance R1 and terminal resistance R2 decision in parallel, the measured value of resistance R is less than the resistance value of terminal resistance R2, i.e. 0＜R＜R2.To export fire alarm signal according to this measurement result resistance signal measurement mechanism.
The line-type heat detector of present embodiment can send different alerting signals reliably according to the Different Results of electric signal measurement measurement device, has improved the reliability of Irrecoverable type line-type heat detector widely.
In the utility model, survey that to have a detecting conductor at least in two detecting conductors 4 and 5 of cable can be elastic conductor, as elastic wire or memory alloy wire etc., another root detecting conductor can be a tinsel, or elastic conductor, as elastic wire or memory alloy wire etc.Memory alloy wire can adopt Ultimum Ti, NiTi copper memorial alloy, iron-based memorial alloy, copper-based memory alloy and have other material of memory function etc.The design load of the martensite reverse transformation finishing temperature Af of memory alloy wire is preferably in 20 ℃～140 ℃ scopes.
In the utility model, survey cable and can comprise the setting that can walk abreast of detecting conductor more than two or two, detecting conductor, as coaxial setting, or parallel to each other or twine and to be provided with etc., semiconductor layer and fused insulating layer are arranged between the detecting conductor, and be parallel with detecting conductor.During as or coaxial be provided with parallel to each other when detecting conductor, semiconductor material layer and fused insulating layer can be arranged between the detecting conductor parallel with detecting conductor or coaxial.When detecting conductor twines mutually when being provided with, semiconductor material layer and fused insulating layer can be that the coating form with routine is coated on the detecting conductor, finish to twine being provided with again.Coating can be that the outer elder generation of detecting conductor coats the layer of semiconductor material layer therein, coats one deck fused insulating layer again, otherwise or, coat fused insulating layer earlier, coat semiconductor material layer again, or the like.Certainly, it is first-class also semiconductor material layer and fused insulating layer can be coated on different detecting conductors respectively.
In the utility model, semiconductor layer can adopt the manufacturing of one of material of characteristic of semiconductor such as PTC, CRT, NTC, conductive rubber, conductivity ceramics at least, certainly also can adopt other suitable made, the thickness of semiconductor layer can be preferably between the 0.1-5 millimeter.Fused insulating layer can adopt materials such as wax, naphthalene anthracene, stearic acid, rosalin, low density polyethylene, high density polyethylene, polypropylene, polyvinyl chloride at least, certainly also can adopt other suitable material to make, the coating thickness of fused insulating layer can be preferably between the 0.1-2 millimeter.
Fig. 6 shows another embodiment with irrecoverable linear temperature-sensitive detector of short trouble warning function of the present utility model.As shown in Figure 6, in the present embodiment, the linear temperature sensor of line-type heat detector of the present utility model comprises two parallel detecting conductor 13,14, semiconductor material layer 15, conductive layer 16 and fused insulating layers 17 that are provided with.Detector also can comprise resistance R 2 (not shown) and electric signal measurement device (not shown).Wherein, semiconductor layer 15 and fused insulating layer 17 are arranged between two detecting conductors 13 and 14, walk abreast with detecting conductor 13 and 14, separate this two detecting conductors, conductive layer 16 is arranged between semiconductor material layer 15 and the fused insulating layer 17, parallel with semiconductor material layer 15 and fused insulating layer 17, separate semiconductor material layer 15 and fused insulating layer 17.
In the present embodiment, except that the course of work of the above, owing between semiconductor material layer 15 and fused insulating layer 17, be provided with conductive layer 16 concurrently, can increase the difference between the measured value R=R2 under electric signal measurement device fire alarm measured value R and the normal operation, thereby fire alarm more accurately is provided.
In the present embodiment, conductive layer 16 can be interrupted also can be continuous, that is, conductive layer can be interrupted conducting, also can be continuous conducting.Conductive layer 16 is parallel with semiconductor material layer 15 and fused insulating layer 17, and is arranged between them, and conductive layer can adopt following several mode to be provided with: twine setting, be arranged in parallel, and coaxial setting, or the like, also can adopt other known mode to be provided with certainly.
Conductive layer can be to be made by materials such as tinsel, nonmetal wire, sheet metal, metallic foil, open column shape metallic sheath, conducting resinl or coating at least.
The conductive layer of interrupted conducting can be used tinsel, nonmetal wire, sheet metal, metallic foil, open column shape metallic sheath etc. is carried out in advance, also can be the state that is made into interrupted conducting after conductive layer by continuous conducting sets again with physics such as machine cuts or chemical method.As conductive layer is under the situation about being made by conducting resinl or coating class material, the conductive layer of interrupted conducting can be to adopt intermittently to smear, spraying or mode such as an immersion direct conductive strips/layer of the interrupted conducting of formation along its length semiconductor material layer outside or fused insulating layer outside, also can be the conductive paint of continuous conducting or be coated with strip/layer after setting again usefulness be processed into the state of interrupted conducting as physics such as mechanical cutting or chemical method.The conductive lengths that the conductive layer of interrupted conducting is every section is preferably greater than 0.05m, interrupted distance between the conductive segment, that is and, nonconducting length is preferably 0.1～10mm.
As previously mentioned, the setting that can walk abreast of two detecting conductors, as can coaxially being provided with, be arranged in parallel or twine setting, Deng, semiconductor material layer and fused insulating layer can be provided with between the detecting conductor concurrently, and with aforementioned similar, conductive layer 16 can be arranged between semiconductor material layer and the fused insulating layer concurrently.Adopt under the mode of twining setting at detecting conductor, semiconductor material layer, but conductive layer and and the melting insulation course can coat on the detecting conductor, also can be coated on two different detecting conductors respectively, be coated with semiconductor material layer and conductive layer as a detecting conductor, another root is coated with fused insulating layer, or one is coated with semiconductor layer, another root is coated with conductive layer and fused insulating layer, or the like.Detecting conductor be arranged in parallel or the situation of coaxial setting under, with aforementioned similar, semiconductor layer, conductive layer and fused insulating layer are arranged between the detecting conductor.
In the irrecoverable linear temperature-sensitive detector with short trouble warning function of the present utility model, also can be coated with sheath at its linear temperature-sensing fire detecting cable, play protection and insulating effect.As at detecting conductor, semiconductor layer, and fused insulating layer, perhaps at detecting conductor, semiconductor layer, conductive layer and fused insulating layer are coated with sheath, etc.
Though, more than with embodiment the utility model is illustrated in conjunction with the accompanying drawings, will be understood that those skilled in the art can change the utility model or improve under the situation that does not depart from connotation of the present utility model and scope.For example, though the situation that comprises two detecting conductors only is shown in the above-mentioned embodiment, come for those skilled in the art, can adopt the detecting conductor more than two fully as required, can comprise three detecting conductors as linear temperature sensor, or the like, semiconductor layer, conductive layer, can be provided with at least two detecting conductors are parallel with fused insulating layer, and be arranged between at least two detecting conductors, at least two detecting conductors are spaced from each other, or the like.
Claims (10)
1, a kind of irrecoverable linear temperature-sensitive detector with the short trouble warning, described line-type heat detector comprises the detection cable, resistance, with the resistance signal measurement mechanism, described detection cable comprises at least two parallel detecting conductor and fused insulating layers that are provided with, and it is characterized in that, described detection cable further comprises semiconductor layer, wherein, described semiconductor material layer and fused insulating layer are arranged between the described detecting conductor, separate described detecting conductor.
2, irrecoverable linear temperature-sensitive detector according to claim 1 further comprises sheath, is coated on outside the described detection cable.
3, irrecoverable linear temperature-sensitive detector according to claim 1, it is characterized in that, described detection cable further comprises conductive layer, is arranged between described semiconductor material layer and the described fused insulating layer, and is parallel with described semiconductor material layer and described fused insulating layer.
4, irrecoverable linear temperature-sensitive detector according to claim 3 is characterized in that, described conductive layer is interrupted conductive layer or continuous conducting layers, and interrupted conducting or continuous conducting are provided.
5, irrecoverable linear temperature-sensitive detector according to claim 4 further comprises sheath, is coated on outside the described detection cable.
6, irrecoverable linear temperature-sensitive detector according to claim 4 is characterized in that, described conductive layer is at least by tinsel, nonmetal wire, and sheet metal, metallic foil, the open column shape metallic sheath, conducting resinl, or electrically-conducting paint is made.
According to any one described irrecoverable linear temperature-sensitive detector of claim 1-6, it is characterized in that 7, at least one is elastic conductor in the described detecting conductor.
8, irrecoverable linear temperature-sensitive detector according to claim 7 is characterized in that, described elastic conductor is elastic wire or memory alloy wire.
9, irrecoverable linear temperature-sensitive detector according to claim 8 is characterized in that, the design load of the martensite reverse transformation finishing temperature Af of described memory alloy wire is in 20 ℃～140 ℃ scope.
10, Irrecoverable type line-type heat detector according to claim 7 is characterized in that, the temperature of fusion of described fused insulating layer is at 40 ℃～180 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620133478 CN200969134Y (en) | 2006-10-19 | 2006-10-19 | Linetype temperature-sensitive detector with short circuit fault alarm |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620133478 CN200969134Y (en) | 2006-10-19 | 2006-10-19 | Linetype temperature-sensitive detector with short circuit fault alarm |
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| CN200969134Y true CN200969134Y (en) | 2007-10-31 |
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| CN 200620133478 Expired - Lifetime CN200969134Y (en) | 2006-10-19 | 2006-10-19 | Linetype temperature-sensitive detector with short circuit fault alarm |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101164639A (en) * | 2006-10-19 | 2008-04-23 | 张卫社 | Recovery-free type linear temperature-sensitive detector with short-circuit fault alarm |
| CN102129753A (en) * | 2011-02-14 | 2011-07-20 | 大连丰元科技发展有限公司 | Fire hydrant burglar alarm device |
| CN101226670B (en) * | 2008-02-02 | 2011-11-09 | 张陈 | Shorted fault and alarming method for beyond-retrieve-type cable-type line-type heat fire detector |
| CN105809876A (en) * | 2016-05-06 | 2016-07-27 | 青岛中阳消防科技股份有限公司 | Line type temperature-sensing detection cable |
-
2006
- 2006-10-19 CN CN 200620133478 patent/CN200969134Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101164639A (en) * | 2006-10-19 | 2008-04-23 | 张卫社 | Recovery-free type linear temperature-sensitive detector with short-circuit fault alarm |
| CN101164639B (en) * | 2006-10-19 | 2012-04-18 | 首安工业消防有限公司 | Recovery-free type linear temperature-sensitive detector with short-circuit fault alarm |
| CN101226670B (en) * | 2008-02-02 | 2011-11-09 | 张陈 | Shorted fault and alarming method for beyond-retrieve-type cable-type line-type heat fire detector |
| CN102129753A (en) * | 2011-02-14 | 2011-07-20 | 大连丰元科技发展有限公司 | Fire hydrant burglar alarm device |
| CN102129753B (en) * | 2011-02-14 | 2013-12-25 | 大连丰元科技发展有限公司 | Fire hydrant burglar alarm device |
| CN105809876A (en) * | 2016-05-06 | 2016-07-27 | 青岛中阳消防科技股份有限公司 | Line type temperature-sensing detection cable |
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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: 20080919 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080919 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 |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Sureland Industry Fire-Fighting Co., Ltd. Assignor: Zhang Weishe|Li Gangjin Contract fulfillment period: 2008.4.10 to 2016.10.18 Contract record no.: 2008110000013 Denomination of utility model: Recovery-free type linear temperature-sensitive detector with short-circuit fault alarm Granted publication date: 20071031 License type: Exclusive license Record date: 20080425 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.4.10 TO 2016.10.18 Name of requester: SHOU AN INDUSTRY FIRE LTD. Effective date: 20080425 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Recovery-free type linear temperature-sensitive detector with short-circuit fault alarm Effective date of registration: 20121010 Granted publication date: 20071031 Pledgee: Bank of America Ltd. Shanghai branch Pledgor: Sureland Industry Fire-Fighting Co., Ltd. Registration number: 2012990000591 |
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| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
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| EXPY | Termination of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20171114 Granted publication date: 20071031 Pledgee: Bank of America Ltd. Shanghai branch Pledgor: Sureland Industry Fire-Fighting Co., Ltd. Registration number: 2012990000591 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |