CN218996120U - Cable type recoverable and positionable temperature-sensing cable and fire alarm system - Google Patents
Cable type recoverable and positionable temperature-sensing cable and fire alarm system Download PDFInfo
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- CN218996120U CN218996120U CN202223294388.XU CN202223294388U CN218996120U CN 218996120 U CN218996120 U CN 218996120U CN 202223294388 U CN202223294388 U CN 202223294388U CN 218996120 U CN218996120 U CN 218996120U
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Abstract
The utility model provides a cable type recoverable and positionable temperature-sensing cable and a fire alarm system. A temperature sensing cable comprising: a first wire; the second wires are arranged along the length direction of the first wires, and a temperature sensing material is connected between the second wires and the first wires; a third wire substantially parallel to the first wire; the plurality of temperature sensing control units are respectively and electrically connected between the adjacent second wires, and the temperature sensing control units are also respectively and electrically connected with the first wires and the third wires; wherein the temperature sensing material is a conductor, and the resistance value of the temperature sensing material changes along with the change of temperature; the adjacent two temperature sensing control units send out fire alarm signals through the first wire and the third wire according to the change of the resistance value of the temperature sensing material between the two temperature sensing control units. The temperature sensing cable and the fire alarm system can detect the occurrence of fire and accurately position the fire point, thereby being beneficial to extinguishing the fire in the initial stage of the occurrence of the fire.
Description
Technical Field
The utility model relates to the technical field of fire-fighting equipment, in particular to a cable type recoverable and positionable temperature-sensing cable and a fire alarm system.
Background
The temperature sensing cable is also called a line type temperature sensing fire detector, and is a fire detector responding to the ambient temperature of a certain continuous line. The temperature sensing cable commonly used at present is generally formed by twisting at least two (or two strands of) wires, and a soluble insulating layer is arranged on the outer sides of the wires. When fire occurs, the soluble insulating layer melts, the two wires are contacted and short-circuited, and when the alarm detects the short circuit of the temperature sensing cable, an alarm signal is sent out. Although the temperature sensing cable can detect whether a fire disaster occurs, the temperature sensing cable cannot accurately position the ignition point when the fire disaster occurs.
The matters in the background section are only those known to the inventors and do not, of course, represent prior art in the field.
Disclosure of Invention
Aiming at one or more defects in the prior art, the utility model provides a cable type recoverable and positionable temperature-sensing cable and a fire alarm system.
The utility model provides a cable type recoverable and positionable temperature-sensing cable, which comprises:
a first wire;
the second wires are arranged along the length direction of the first wires, and a temperature sensing material is connected between the second wires and the first wires;
a third wire substantially parallel to the first wire; and
the temperature sensing control units are respectively and electrically connected between the adjacent second wires and are also respectively and electrically connected with the first wires and the third wires;
wherein the temperature sensing material is a conductor, and the resistance value of the temperature sensing material changes with the change of temperature; two adjacent temperature sensing control units send out fire alarm signals through the first lead and the third lead according to the change of the resistance value of the temperature sensing material positioned between the two adjacent temperature sensing control units.
According to one aspect of the present utility model, wherein adjacent two temperature sensing control units are configured to monitor a voltage between a second wire and a first wire connected therebetween, and to emit the fire alarm signal, the normal state signal, the fault state signal, or the short circuit state signal through the first wire and the third wire according to the voltage.
According to one aspect of the present utility model, wherein the temperature of the temperature sensing material is changed in a temperature range of 25-120 ℃, and the resistance value of the temperature sensing material is changed linearly with the change of the temperature.
According to one aspect of the utility model, wherein the temperature sensing cable further comprises an insulating layer; a plurality of placement holes are formed in the insulating layer at intervals; the insulating layer still is provided with first through wires hole and the second through wires hole with settling hole intercommunication, the temperature sensing control unit is located settling hole, first wire, second wire and temperature sensing material set up in the first through wires hole, the third wire sets up in the second through wires hole.
According to one aspect of the utility model, a plurality of break seams are arranged on the insulating layer, the break seams are in one-to-one correspondence with the plurality of placement holes and are communicated with each other, and the first lead and the third lead are exposed at the break seams and are respectively electrically connected with the corresponding temperature sensing control units.
According to one aspect of the utility model, an insulating protection layer is arranged outside the insulating layer, and the insulating protection layer at least covers the mounting hole.
According to one aspect of the utility model, the insulation protection layer comprises a plurality of heat-shrinkable sealing pipes, and the heat-shrinkable sealing pipes are arranged in one-to-one correspondence with the plurality of mounting holes.
According to one aspect of the utility model, the first wire is stranded wire, a first bonding pad is arranged on the temperature sensing control unit, and the first wire is welded with the first bonding pad.
According to one aspect of the utility model, the second wire is a single-wire, the temperature sensing control unit is provided with a connecting conductor, the connecting conductor is provided with a connecting hole, and the end part of the second wire is inserted into the connecting hole and welded with the connecting conductor.
The utility model also provides a fire alarm system, comprising:
a temperature sensing cable as described above;
and the fire alarm controller is electrically connected with one end of the temperature sensing cable and is configured to send out a normal working prompt, a fire alarm or a fault alarm according to signals sent out by the temperature sensing control unit on the temperature sensing cable.
According to one aspect of the utility model, wherein the fire alarm controller is configured to determine the location of a fire.
Compared with the prior art, the embodiment of the utility model provides a cable type recoverable and positionable temperature-sensing cable and a fire alarm system. When a fire disaster occurs, the temperature near the fire disaster is increased, the resistance value of the temperature sensing material near the fire disaster is changed, two adjacent temperature sensing control units monitor the change of the resistance value of the temperature sensing material, fire disaster alarm signals are sent out through a first wire and a third wire, and the position of the fire disaster can be determined according to the position of the temperature sensing control unit sending out the fire disaster alarm signals.
The voltage between the second wire and the first wire connected between the two adjacent temperature sensing control units is monitored, so that whether the temperature sensing cable fails or not can be judged, and the position of the failure point of the temperature sensing cable can be determined according to the positions of the temperature sensing control units which send out failure state signals and short circuit state signals.
After the temperature sensing cable encounters a high-temperature alarm, the temperature sensing cable can be restored to a normal monitoring state along with the reduction of the environmental temperature.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:
FIG. 1 shows a schematic diagram of a cabled recoverable positionable temperature sensing cable according to one embodiment of the present utility model;
FIG. 2 illustrates an exploded view of a cable-type recoverable positionable temperature-sensitive cable according to one embodiment of the present utility model;
fig. 3 shows a schematic diagram of a temperature-sensitive control unit according to an embodiment of the utility model.
In the figure: 100. a temperature sensing cable; 110. a first wire; 120. a second wire; 130. a third wire; 140. a temperature sensing control unit; 141. a first bonding pad; 142. a second bonding pad; 143. a connection conductor; 144. a connection hole; 150. a temperature sensing material; 160. an insulating layer; 161. a first threading hole; 162. a mounting hole; 163. breaking the seam; 170. and an insulating protective layer.
Detailed Description
Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in various different ways without departing from the spirit or scope of the present utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, and may be mechanically connected, electrically connected, or may communicate with each other, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is less level than the second feature.
The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.
The embodiments of the present utility model will be described below with reference to the accompanying drawings, and it should be understood that the embodiments described herein are for illustration and explanation of the present utility model only, and are not intended to limit the present utility model.
Fig. 1 shows a schematic diagram of a cable-type recoverable positionable temperature-sensing cable 100 according to an embodiment of the present utility model, fig. 2 shows an exploded view of the cable-type recoverable positionable temperature-sensing cable 100 according to an embodiment of the present utility model, and is described in detail below in connection with fig. 1 and 2.
As shown in fig. 1 and 2, the temperature sensing cable 100 includes a first wire 110, a second wire 120, a third wire 130, and a temperature sensing control unit 140. The first, second and third wires 110, 120 and 130 may be metal wires, such as copper wires, aluminum wires, etc. The first conductive line 110, the second conductive line 120, and the third conductive line 130 are substantially parallel, and the second conductive line 120 is provided with a plurality of lines at intervals along the length direction of the first conductive line 110, the second conductive line 120 may be provided between the first conductive line 110 and the second conductive line 120, and a temperature sensing material 150 is connected between each of the second conductive lines 120 and the first conductive line 110, the temperature sensing material 150 is a conductor, and the resistance value of the temperature sensing material 150 changes with the change of temperature (for example, the higher the temperature of the temperature sensing material 150, the smaller the resistance value thereof). The temperature sensing control units 140 are provided in plurality, and the plurality of temperature sensing control units 140 are electrically connected between the adjacent second wires 120, respectively, and the temperature sensing control units 140 are also electrically connected with the first wires 110 and the third wires 130, respectively.
The adjacent temperature sensing control units 140 may issue a fire alarm signal through the first and third wires 110 and 130 according to a change in resistance value of the temperature sensing material 150 therebetween. Specifically, the adjacent two temperature sensing control units 140 are configured to monitor the voltage U between the second wire 120 and the first wire 110 connected therebetween (e.g., may monitor using a difference detection principle, a wheatstone bridge detection principle, etc.), and to emit the fire alarm signal through the first wire 110 and the third wire 130 according to the voltage U. For example, when the temperature sensing cable 100 is powered on, the voltage U between the second wire 120 and the first wire 110 is substantially unchanged, if a fire occurs near the temperature sensing cable 100, the temperature sensing material 150 near the ignition point is heated, and the resistance value of the temperature sensing material 150 is rapidly reduced, so that the voltage U between the corresponding second wire 120 and the first wire 110 is rapidly reduced, when two temperature sensing control units 140 adjacent to the temperature sensing material 150 detect that the voltage U is reduced to a preset value, a fire alarm signal is sent out through the first wire 110 and the third wire 130, and the fire alarm signal may include the position information (or the identity identifier) of the temperature sensing control unit 140.
According to one embodiment of the present utility model, as shown in fig. 1, the adjacent two temperature-sensing control units 140 are further configured to emit a normal state signal, a fault state signal, or a short-circuit state signal through the first and third wires 110 and 130 according to the voltage U. For example, when two adjacent temperature-sensing control units 140 monitor that the voltage U between the corresponding second wire 120 and the first wire 110 is at a normal operating value (or a normal operating range), the temperature-sensing control units 140 send out a normal state signal through the first wire 110 and the third wire 130; when two adjacent temperature sensing control units 140 monitor that the voltage U between the corresponding second wire 120 and the first wire 110 is a fault preset value (when the temperature sensing cable 100, particularly the temperature sensing control unit 140, has electronic devices damaged, the voltage U is affected, and the values of the different voltage U of the damaged electronic devices also have differences, so that the fault preset value can be set according to the value presented by the voltage U after the electronic devices are damaged), the temperature sensing control unit 140 sends a fault state signal through the first wire 110 and the third wire 130; when the adjacent two temperature sensing control units 140 detect that the voltage U between the corresponding second wire 120 and the first wire 110 is 0, the temperature sensing control units 140 emit a short-circuit state signal through the first wire 110 and the third wire 130.
The distance between adjacent temperature sensing and controlling units 140 (the length of the single second wire 120) may be set as required, for example, 1 meter, 3 meters, or 10 meters. The distance between adjacent temperature-sensing control units 140 (the length of the single second wire 120) is related to the accuracy of locating the ignition point and the fault point of the temperature-sensing cable 100, and the smaller the distance between adjacent temperature-sensing control units 140 (the longer the length of the single second wire 120), the higher the accuracy of locating the ignition point and the fault point of the temperature-sensing cable 100.
According to one embodiment of the present utility model, as shown in fig. 2, the temperature sensing material 150 may be a material whose resistance value decreases with an increase in temperature, and the resistance value of the temperature sensing material 150 is linearly changed (e.g., linearly decreased) with a change in temperature during a change in temperature of 25-120 ℃. By selecting the temperature sensing material 150 with the resistance value changing linearly with the change of temperature, the voltage U between the second wire 120 and the first wire 110 changes more regularly with the change of the resistance value of the temperature sensing material 150, which is more beneficial for the temperature sensing control unit 140 to send corresponding signals through the first wire 110 and the third wire 130 according to the change of the voltage U. The formulation of the temperature sensitive material 150 may include, but is not limited to, a low smoke zero halogen flame retardant sheath material, flame retardant polyethylene, thermoplastic elastomer, thermoplastic polyurethane elastomer rubber, and a proportion of carbon (carbon powder, diamond powder) or germanium or silicon.
According to an embodiment of the present utility model, as shown in fig. 1 and 2, the temperature sensing cable 100 further includes an insulation layer 160, a first through hole 161, a second through hole and a placement hole 162 are disposed on the insulation layer 160, wherein the first through hole 161 and the second through hole are disposed along a length direction of the insulation layer 160, the first wire 110, the second wire 120 and the temperature sensing material 150 are disposed through the first through hole 161, the third wire 130 is disposed through the second through hole, the placement hole 162 is disposed on the insulation layer 160 at intervals along the length direction of the insulation layer 160, and the plurality of temperature sensing control units 140 are disposed in the placement holes 162, respectively. The insulating layer 160 may provide protection for the first wire 110, the second wire 120, the temperature sensing material 150, and the temperature sensing control unit 140, and separate the third wire 130 from the first wire 110, the second wire 120, and the temperature sensing material 150, preventing a short circuit. The insulating layer 160 can be made of low-smoke halogen-free flame retardant sheath material, is not easy to burn, has small smoke degree during burning, and has no toxic gas overflow.
According to an embodiment of the present utility model, as shown in fig. 2, a plurality of slits 163 are provided on the insulating layer 160 at intervals, the plurality of slits 163 are provided in one-to-one correspondence with and communicate with the plurality of mounting holes 162, and the first and third wires 110 and 130 are exposed at positions of the insulating layer 160 where the slits 163 are provided and electrically connected to the respective temperature sensing control units 140, respectively. Fig. 3 shows a schematic view of a temperature sensing control unit 140 according to an embodiment of the present utility model, specifically, as shown in fig. 2 and 3, a first bonding pad 141 and a second bonding pad 142 are respectively disposed at both sides (upper and lower sides in fig. 3) of the temperature sensing control unit 140, and the first bonding pad 141 and the second bonding pad 142 extend into a break 163 of an insulating layer 160 and are respectively bonded with a first conductive wire 110 and a third conductive wire 130. The first wire 110 may be a stranded wire formed by stranding a plurality of wires so as to be soldered with the first pad 141 and secure stability of soldering, and the third wire 130 may be a stranded wire accordingly.
According to an embodiment of the present utility model, as shown in fig. 2 and 3, connection conductors 143 may be provided at both ends (left and right ends in fig. 3) of the temperature sensing control unit 140, the connection conductors 143 having connection holes 144. The second wire 120 may be a single wire, and an end of the second wire 120 is inserted into a connection hole 144 of a connection conductor 143 of the corresponding temperature sensing control unit 140 and welded with the connection conductor 143, and the second wire 120 is stably connected with the connection conductor 143, and has a large contact area and high reliability.
According to an embodiment of the present utility model, as shown in fig. 1 and 2, an insulation shield layer 170 may be provided outside the insulation layer 160, and the insulation shield layer 170 covers at least the disposition hole 162 on the insulation layer 160. The insulating protection layer 170 is tightly combined with the insulating layer 160, so that external water, moisture, dust and the like can be prevented from entering the mounting hole 162, and the temperature sensing control unit 140 can be well protected. Specifically, the insulation protection layer 170 may include a plurality of heat-shrinkable sealed tubes corresponding to the plurality of placement holes 162, and in other embodiments, the insulation protection layer 170 may be a heat-shrinkable sealed tube disposed along the insulation layer 160.
The present utility model also provides a fire alarm system comprising a fire alarm controller and the temperature sensing cable 100 as described above. The fire alarm controller is electrically connected to one end of the temperature sensing cable 100 (for example, electrically connected to the first conductive wire 110 and the third conductive wire 130 of the temperature sensing cable 100), and is configured to send out a corresponding normal operation prompt, fire alarm, fault alarm or short circuit alarm according to a signal (for example, the above-mentioned normal state signal, fire alarm signal, fault state signal or short circuit state signal) sent out by the temperature sensing control unit 140 on the temperature sensing cable 100.
Compared with the prior art, the temperature sensing cable 100 and the fire alarm system provided by the embodiment of the utility model can detect the occurrence of a fire and accurately position the fire point, are beneficial to putting out the fire in the initial stage of the occurrence of the fire, can automatically check whether the fire has faults or not and accurately position the fault position, and are beneficial to maintenance. After the fire alarm, the temperature sensing cable 100 can automatically recover to a normal monitoring state along with the reduction of the environmental temperature if not burnt.
Finally, it should be noted that: the foregoing description is only illustrative of the present utility model and is not intended to be limiting, and although the present utility model has been described in detail with reference to the foregoing illustrative embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (11)
1. A cable-type recoverable positionable temperature-sensitive cable, comprising:
a first wire;
the second wires are arranged along the length direction of the first wires, and a temperature sensing material is connected between the second wires and the first wires;
a third wire substantially parallel to the first wire; and
the temperature sensing control units are respectively and electrically connected between the adjacent second wires and are also respectively and electrically connected with the first wires and the third wires;
wherein the temperature sensing material is a conductor, and the resistance value of the temperature sensing material changes with the change of temperature; two adjacent temperature sensing control units send out fire alarm signals through the first lead and the third lead according to the change of the resistance value of the temperature sensing material positioned between the two adjacent temperature sensing control units.
2. The temperature sensing cable according to claim 1, wherein two adjacent temperature sensing control units are configured to monitor a voltage between a second wire and a first wire connected therebetween, and to issue the fire alarm signal, the normal state signal, the fault state signal, or the short-circuit state signal through the first wire and the third wire according to the voltage.
3. The temperature-sensitive cable according to claim 1, wherein the resistance value of the temperature-sensitive material is linearly changed with the change of the temperature during the change of the temperature-sensitive material at 25-120 ℃.
4. The temperature-sensing cable of claim 1, further comprising an insulating layer; a plurality of placement holes are formed in the insulating layer at intervals; the insulating layer still is provided with first through wires hole and the second through wires hole with settling hole intercommunication, the temperature sensing control unit is located settling hole, first wire, second wire and temperature sensing material set up in the first through wires hole, the third wire sets up in the second through wires hole.
5. The temperature-sensitive cable according to claim 4, wherein a plurality of break seams are provided on the insulating layer, the break seams are provided in one-to-one correspondence with the plurality of placement holes and are communicated with each other, and the first wire and the third wire are exposed at the break seams and are electrically connected with the corresponding temperature-sensitive control units, respectively.
6. The temperature-sensitive cable according to claim 4, wherein the insulating layer is provided with an insulating shield layer outside, the insulating shield layer covering at least the placement hole.
7. The temperature-sensitive cable of claim 6, wherein the insulation shield comprises a plurality of heat-shrinkable sealing tubes, and the plurality of heat-shrinkable sealing tubes are arranged in one-to-one correspondence with the plurality of mounting holes.
8. The temperature-sensing cable according to any one of claims 1 to 7, wherein the first wire is a stranded wire, a first bonding pad is provided on the temperature-sensing control unit, and the first wire is bonded to the first bonding pad.
9. The temperature sensing cable according to any one of claims 1 to 7, wherein the second wire is a single wire, a connection conductor is provided on the temperature sensing control unit, the connection conductor has a connection hole, and an end of the second wire is inserted into the connection hole and welded with the connection conductor.
10. A fire alarm system, comprising:
a temperature-sensitive cable as claimed in any one of claims 1 to 9;
and the fire alarm controller is electrically connected with one end of the temperature sensing cable and is configured to send out a normal working prompt, a fire alarm or a fault alarm according to signals sent out by the temperature sensing control unit on the temperature sensing cable.
11. The fire alarm system of claim 10 wherein the fire alarm controller is configured to determine the location of a fire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223294388.XU CN218996120U (en) | 2022-12-08 | 2022-12-08 | Cable type recoverable and positionable temperature-sensing cable and fire alarm system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223294388.XU CN218996120U (en) | 2022-12-08 | 2022-12-08 | Cable type recoverable and positionable temperature-sensing cable and fire alarm system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218996120U true CN218996120U (en) | 2023-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223294388.XU Active CN218996120U (en) | 2022-12-08 | 2022-12-08 | Cable type recoverable and positionable temperature-sensing cable and fire alarm system |
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| Country | Link |
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| CN (1) | CN218996120U (en) |
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- 2022-12-08 CN CN202223294388.XU patent/CN218996120U/en active Active
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