CN218996119U - Cable type recoverable and positionable temperature-sensing cable and fire alarm system - Google Patents

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 power line; the temperature sensing wires are arranged along the length direction of the power supply wire and comprise a first wire, a second wire and a temperature sensing material, the temperature sensing material is connected between the first wire and the second wire, the temperature sensing material is a conductor, and the resistance value of the temperature sensing material changes along with the change of temperature; and the plurality of temperature sensing control units are respectively and electrically connected between the adjacent temperature sensing wires, the temperature sensing control units are electrically connected with the power wire, and the adjacent two temperature sensing control units send out fire alarm signals through the power wire according to the change of the resistance value of the temperature sensing material positioned between the two temperature sensing control units. When a fire disaster occurs, the temperature sensing control unit close to the fire disaster point sends out a fire disaster alarm signal through the power line, and the position of the fire disaster point can be determined according to the position of the temperature sensing control unit sending out the fire disaster alarm signal, so that the fire disaster can be extinguished at the initial stage of the fire disaster.

Description

Cable type recoverable and positionable temperature-sensing cable and fire alarm system

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 power line;

the temperature sensing wires are arranged along the length direction of the power supply wire and comprise a first wire, a second wire and a temperature sensing material, the temperature sensing material is connected between the first wire and the second wire, the temperature sensing material is a conductor, and the resistance value of the temperature sensing material changes along with the change of temperature; and

the temperature sensing control units are respectively and electrically connected between the adjacent temperature sensing wires, the temperature sensing control units are electrically connected with the power wires, and the two adjacent temperature sensing control units send out fire alarm signals through the power wires according to the change of the resistance value of the temperature sensing material 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 first wire and a second 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 power line 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 present utility model, the power line includes a third wire and a fourth wire, and the third wire and the fourth wire are electrically connected to the temperature sensing control unit, respectively.

According to one aspect of the utility model, wherein the power cord further comprises an inner insulating sheath; the third wire and the fourth wire are disposed within and separated by the inner insulating sheath; a plurality of placement holes are formed in the inner insulating sheath at intervals, and a plurality of temperature sensing control units are respectively arranged in the corresponding placement holes.

According to one aspect of the utility model, the inner insulating sheath is further provided with a plurality of wire clamping grooves, the wire clamping grooves and the mounting holes are alternately arranged on the inner insulating sheath, and the temperature sensing wires are respectively arranged in the corresponding wire clamping grooves.

According to one aspect of the utility model, a plurality of break seams are arranged on the inner insulating sheath, the break seams are in one-to-one correspondence with the plurality of mounting holes and are communicated with each other, and the third wire and the fourth wire 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, the inner insulating sheath is a low smoke halogen-free flame retardant sheath.

According to one aspect of the utility model, the temperature sensing cable further comprises an outer insulating sheath, and the outer insulating sheath is covered outside the inner insulating sheath.

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 sensing control unit close to the ignition point sends out a fire disaster alarm signal through a power line; the location of the ignition point can be determined according to the location of the temperature sensing control unit that emits the fire alarm signal.

Through set up card wire casing and mounting hole on the inner insulating sheath, can provide the mounted position for temperature sensing line and temperature sensing control unit, help reducing the sectional area of temperature sensing cable, improve space utilization, make the temperature sensing cable deposit and transport more easily.

By arranging the outer insulating sheath outside the inner insulating sheath, water, moisture and the like can be prevented from corroding the power line, the temperature sensing line and the temperature sensing control unit.

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 power line; 111. a third wire; 112. a fourth wire; 113. an inner insulating sheath; 114. a mounting hole; 115. breaking the seam; 116. wire clamping groove; 120. a temperature sensing line; 121. a first wire; 122. a second wire; 123. a temperature sensing material; 130. a temperature sensing control unit; 131. a first bonding pad; 132. a second bonding pad; 133. a first connection conductor; 134. a second connection conductor; 140. and an outer insulating sheath.

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 power line 110, a temperature sensing line 120 and a temperature sensing control unit 130, wherein the temperature sensing line 120 and the temperature sensing control unit 130 are all provided in plurality, the temperature sensing line 120 and the temperature sensing control unit 130 are alternately arranged along a length direction of the power line 110, and adjacent temperature sensing lines 120 and temperature sensing control units 130 are electrically connected, and the temperature sensing control unit 130 is also electrically connected with the power line 110. Specifically, the temperature sensing wire 120 includes a first conductive wire 121, a second conductive wire 122, and a temperature sensing material 123, where the first conductive wire 121 and the second conductive wire 122 are approximately parallel, two ends of the first conductive wire 121 are respectively electrically connected to the adjacent temperature sensing control units 130, two ends of the second conductive wire 122 are respectively electrically connected to the adjacent temperature sensing control units 130, the temperature sensing material 123 is connected between the first conductive wire 121 and the second conductive wire 122, the temperature sensing material 123 is a conductor, and the resistance value of the temperature sensing material 123 changes with the change of temperature (for example, the higher the temperature of the temperature sensing material 123, the smaller the resistance value thereof). The power line 110 may supply power to the temperature sensing control unit 130, and the temperature sensing control unit 130 may distribute power to the first and second wires 121 and 122 such that a voltage difference exists between the first and second wires 121 and 122.

The adjacent temperature sensing control units 130 may emit fire alarm signals through the power line 110 according to the variation of the resistance value of the temperature sensing material 123 located therebetween. Specifically, the adjacent two temperature sensing control units 130 are configured to monitor the voltage U between the first wire 121 and the second wire 122 connected therebetween (e.g., may detect using a difference detection principle, a wheatstone bridge detection principle, etc.), and to emit the fire alarm signal through the power line 110 according to the voltage U. For example, when the temperature sensing cable 100 is powered on, the voltage U between the first wire 121 and the second wire 122 is substantially unchanged, if a fire occurs near the temperature sensing cable 100, the temperature sensing material 123 near the fire is heated, and the resistance value of the temperature sensing material 123 is rapidly reduced, so that the voltage U between the corresponding first wire 121 and the second wire 122 is rapidly reduced, and when two temperature sensing control units 130 adjacent to the temperature sensing material 123 detect that the voltage U is reduced to a preset value, a fire alarm signal is sent out through the power line 110. The fire alarm signal may include location information (or an identification) of the temperature sensing control unit 130, and the fire point may be accurately located by parsing the fire alarm signal.

According to one embodiment of the present utility model, as shown in fig. 1 and 2, the adjacent two temperature-sensing control units 130 are further configured to emit a normal state signal, a fault state signal, or a short circuit state signal through the power line 110 according to the voltage U. For example, when two adjacent temperature-sensing control units 130 monitor that the voltage U between the corresponding first wire 121 and second wire 122 is at a normal operating value (or normal operating range), the temperature-sensing control units 130 send out a normal state signal through the power wire 110; when two adjacent temperature sensing control units 130 monitor that the voltage U between the corresponding first wire 121 and the second wire 122 is a preset fault value (when the temperature sensing cable 100, particularly the temperature sensing control unit 130, has electronic devices damaged, the voltage U is affected, and the values of different damaged electronic devices U will also have differences, so that the preset fault value can be set according to the value presented by the voltage U after the electronic devices are damaged), the temperature sensing control unit 130 sends a fault state signal through the power wire 110; when the adjacent two temperature sensing control units 130 detect that the voltage U between the corresponding first and second wires 121 and 122 is 0, the temperature sensing control units 130 emit a short-circuit state signal through the power line 110.

The distance between adjacent temperature sensing control units 130 (the length of the temperature sensing line 120) may be set as required, for example, 2 meters, 5 meters, or 8 meters may be used. The distance between adjacent temperature sensing control units 130 (the length of the temperature sensing 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 130 (the shorter the length of the temperature sensing 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 123 may be a material whose resistance value decreases with an increase in temperature, and the resistance value of the temperature sensing material 123 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 123 with the resistance value changing linearly with the change of temperature, the voltage U between the second wire 122 and the first wire 121 changes more regularly with the change of the resistance value of the temperature sensing material 123, which is more beneficial for the temperature sensing control unit 130 to send corresponding signals through the power wire 110 according to the change of the voltage U. The formulation of the temperature sensitive material 123 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. 2, the power line 110 may include a third conductive line 111 and a fourth conductive line 112, the third conductive line 111 and the fourth conductive line 112 are substantially parallel, and the third conductive line 111 and the fourth conductive line 112 are electrically connected to the respective temperature sensing control units 130, respectively, to supply power to and transmit signals to the temperature sensing control units 130. The power line 110 may further include an inner insulation sheath 113, and the third and fourth wires 111 and 112 are disposed within the inner insulation sheath 113 and separated by the inner insulation sheath 113 so as not to short the third and fourth wires 111 and 112. The inner insulating sheath 113 is a low-smoke halogen-free flame-retardant sheath, specifically, the inner insulating sheath 113 can be formed outside the third wire 111 and the fourth wire 112 by using common low-smoke halogen-free flame-retardant sheath materials for extrusion molding, so that the prepared inner insulating sheath 113 has good flame retardance, and has small smoke degree and no toxic gas overflow during combustion.

A plurality of mounting holes 114 are formed on the inner insulating sheath 113 at intervals along the length direction thereof, the plurality of temperature sensing control units 130 are respectively arranged in the mounting holes 114, a plurality of breaking slits 115 can be formed on the inner insulating sheath 113, the plurality of breaking slits 115 are arranged in one-to-one correspondence with the plurality of mounting holes 114 and are communicated with each other, and the third wire 111 and the fourth wire 112 are exposed at the breaking slits 115 and are respectively electrically connected with the corresponding temperature sensing control units 130.

Specifically, a first bonding pad 131 and a second bonding pad 132 are respectively disposed at both sides (upper side and lower side in fig. 3) of the temperature sensing control unit 130, and the first bonding pad 131 and the second bonding pad 132 extend into the break line 115 of the inner insulation sheath 113 and are respectively bonded with the third conductive wire 111 and the fourth conductive wire 112. The third wire 111 may be a twisted wire formed by twisting a plurality of metal wires so as to be soldered with the first pad 131 and to secure stability of soldering. Accordingly, the fourth wire 112 may be a twisted wire.

According to an embodiment of the present utility model, as shown in fig. 2 and 3, a first connection conductor 133 and a second connection conductor 134 are provided on the temperature sensing control unit 130, and the temperature sensing control unit 130 is connected with the first and second wires 121 and 122 through the first and second connection conductors 133 and 134, respectively, to improve connection strength and reliability. Specifically, both the first wire 121 and the second wire 122 may be single wires; the first connecting conductors 133 are provided with two and are respectively positioned at two ends of the corresponding temperature sensing control unit 130, the first connecting conductors 133 are provided with first connecting holes, and the end parts of the first wires 121 are inserted into the first connecting holes of the corresponding first connecting conductors 133 and welded with the first connecting conductors 133; the second connection conductors 134 are provided in two and are respectively located at two ends of the corresponding temperature sensing control unit 130, the second connection conductors 134 have second connection holes, and ends of the second wires 122 are inserted into the second connection holes of the corresponding second connection conductors 134 and welded with the second connection conductors 134.

According to an embodiment of the present utility model, as shown in fig. 2, a wire clamping groove 116 is further provided at one side of the inner insulation sheath 113, and the wire clamping groove 116 is provided along the length direction of the inner insulation sheath 113 and intersects with each of the mounting holes 114. The temperature sensing wire 120 is clamped in the wire clamping groove 116. Specifically, the cross section of the wire clamping groove 116 is approximately C-shaped, and the width of the notch is smaller than the width of the temperature sensing wire 120, so that the temperature sensing wire 120 is not easy to be separated from the wire clamping groove 116. By clamping the temperature sensing wire 120 in the wire clamping groove 116, the temperature sensing wire 120 is tightly combined with the power wire 110, and the temperature sensing wire 120 and the power wire 110 are not easy to slide relatively, so that the stability of connection between the temperature sensing control unit 130 and the temperature sensing wire 120 and the power wire 110 is ensured.

According to an embodiment of the present utility model, as shown in fig. 1 and 2, the temperature sensing cable 100 further includes an outer insulation sheath 140, and the outer insulation sheath 140 is wrapped around the inner insulation sheath 113 and is disposed along the entire length of the inner insulation sheath 113. The outer insulating sheath 140 may be made of a non-hydrophilic polymer material, and the outer insulating sheath 140 and the inner insulating sheath 113 are tightly combined, so that the temperature sensing wire 120 is prevented from being separated from the wire clamping groove 116, and external water, moisture, dust and the like are prevented from entering the mounting hole 114, and a good protection effect is achieved on the temperature sensing control unit 130.

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 (e.g., electrically connected to the third wire 111 and the fourth wire 112 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 (e.g., 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 130 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 power line;

the temperature sensing wires are arranged along the length direction of the power supply wire and comprise a first wire, a second wire and a temperature sensing material, the temperature sensing material is connected between the first wire and the second wire, the temperature sensing material is a conductor, and the resistance value of the temperature sensing material changes along with the change of temperature; and

the temperature sensing control units are respectively and electrically connected between the adjacent temperature sensing wires, the temperature sensing control units are electrically connected with the power wires, and the two adjacent temperature sensing control units send out fire alarm signals through the power wires according to the change of the resistance value of the temperature sensing material 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 first wire and a second 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 power supply line 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 according to claim 1, wherein the power line includes a third wire and a fourth wire, the third wire and the fourth wire being electrically connected to the temperature-sensing control unit, respectively.

5. The temperature-sensitive cable of claim 4, wherein the power cord further comprises an inner insulating sheath; the third wire and the fourth wire are disposed within and separated by the inner insulating sheath; a plurality of placement holes are formed in the inner insulating sheath at intervals, and a plurality of temperature sensing control units are respectively arranged in the corresponding placement holes.

6. The temperature-sensitive cable of claim 5, wherein the inner insulating sheath is further provided with a wire clamping groove, and the temperature-sensitive wire is clamped in the wire clamping groove.

7. The temperature-sensing cable according to claim 5, wherein the inner insulating sheath is provided with a plurality of break seams, the break seams are arranged in one-to-one correspondence with the plurality of mounting holes and are communicated with each other, and the third wire and the fourth wire are exposed at the break seams and are electrically connected with the corresponding temperature-sensing control units, respectively.

8. The temperature-sensitive cable of claim 5, wherein the inner insulating sheath is a low smoke, halogen-free, flame retardant sheath.

9. The temperature-sensing cable of claim 5, further comprising an outer insulating sheath that is wrapped around the inner insulating sheath.

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.

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