CN216562523U - Temperature sensing power supply cable - Google Patents
Temperature sensing power supply cable Download PDFInfo
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- CN216562523U CN216562523U CN202122916173.6U CN202122916173U CN216562523U CN 216562523 U CN216562523 U CN 216562523U CN 202122916173 U CN202122916173 U CN 202122916173U CN 216562523 U CN216562523 U CN 216562523U
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- temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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Abstract
The temperature sensing power supply cable comprises a power supply wire core, two groups of temperature sensing wire cores, an insulating layer and an outer sheath, wherein the power supply wire core, the temperature sensing wire cores and the insulating layer are wrapped in the outer sheath; the temperature sensing frame has a first shape when the temperature is lower than the phase change temperature of the memory alloy, the temperature sensing frame has a second shape when the temperature is higher than the phase change temperature of the memory alloy, the temperature sensing frame is in the first shape and can keep the two temperature sensing wire cores disconnected, and the temperature sensing frame is in the second shape and can conduct the two temperature sensing wire cores; the temperature-sensing wire core can reduce the influence of temperature on the resistance value of the temperature-sensing wire core after being conducted, so that the fire danger position can be conveniently deduced, and the dangerous case can be timely eliminated.
Description
Technical Field
The utility model relates to the technical field of cables, in particular to a temperature-sensing power supply cable.
Background
The power supply cable is used for transmitting and distributing electric energy, and the power cable is commonly used for urban underground power grids, power station leading-out lines, power supply inside industrial and mining enterprises and power transmission lines under river-crossing seawater. When the power supply cable is used, the power supply cable needs to be far away from a fire source, and particularly when fire danger occurs, the power supply cable needs to be powered off in time, so that larger loss caused by electric leakage or short circuit is avoided.
The temperature sensing cable is a cable capable of detecting fire, and the existing temperature sensing cable comprises two temperature sensing wire cores, a plurality of thermistors are arranged between the two temperature sensing wire cores at intervals, and the tail end of the cable is connected with a monitoring terminal; when the temperature of the cable rises, the resistance value of the thermistor in the corresponding area is reduced to conduct the two temperature sensing wire cores, and signals are transmitted to the monitoring terminal to prompt fire danger. However, since the resistance of the thermistor is related to the temperature, and the resistance value of the temperature sensing wire core is related to the length of the energized wire core, the same current may be generated when the temperature sensing wire core is energized by the thermistor at different positions due to different temperatures, so that it is difficult to infer the position of fire risk according to the current on the temperature sensing wire core, which affects the dangerous situation investigation and maintenance.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model provides the temperature sensing power supply cable to reduce the influence of temperature on the resistance value of the conducted temperature sensing wire core, so as to conveniently deduce the fire danger position and timely eliminate the dangerous case.
In order to achieve the purpose, the temperature sensing power supply cable comprises a power supply wire core, two groups of temperature sensing wire cores, an insulating layer and an outer sheath, wherein the power supply wire core, the temperature sensing wire cores and the insulating layer are wrapped in the outer sheath; the temperature sensing frame has a first shape when the temperature is lower than the phase change temperature of the memory alloy, the temperature sensing frame has a second shape when the temperature is higher than the phase change temperature of the memory alloy, the temperature sensing frame is in the first shape and can keep the two temperature sensing wire cores disconnected, and the temperature sensing frame is in the second shape and can enable the two temperature sensing wire cores to be connected.
In one embodiment, a shielding layer is further arranged in the outer sheath, and the shielding layer wraps the power supply wire core, the temperature sensing wire core and the insulating layer.
In one embodiment, the temperature sensing wire cores are arranged in parallel in the insulating layer, the temperature sensing frame is in a U shape, and the middle part of the temperature sensing frame is tightly arranged on the insulating layer between the temperature sensing wire cores; when the temperature sensing frame is in the first form, the two sides of the temperature sensing frame are respectively far away from the two temperature sensing wire cores, and when the temperature sensing frame is in the second form, the two sides of the temperature sensing frame are respectively abutted against the two temperature sensing wire cores.
In one embodiment, the insulating layer between the temperature sensing wire cores is provided with a clamping groove, two ends of the clamping groove are respectively provided with a containing groove, the side walls of the temperature sensing wire cores are respectively and partially arranged in the containing grooves, the middle part of the temperature sensing frame is clamped in the clamping groove, and two sides of the temperature sensing frame are respectively arranged in the containing grooves.
In one embodiment, arc-shaped grooves are further formed in two sides of the temperature sensing frame respectively, and the temperature sensing frame in the second state can enable the arc-shaped grooves to be attached to the side walls of the temperature sensing wire core.
In one embodiment, the temperature sensing shelf is in a U-shaped sheet structure.
In one embodiment, the outer sheath is provided with length scale marks.
The temperature sensing power supply cable at least has the following advantages:
(1) when the temperature of the temperature sensing frame rises to reach the phase change temperature of the memory alloy due to fire, the temperature sensing frame is changed from the first form to the second form, and the two groups of temperature sensing wire cores are conducted. The influence of the environmental temperature on the resistance value of the temperature sensing frame made of the memory alloy is small, and the resistance value of the temperature sensing wire core access circuit is mainly determined by the conduction length of the temperature sensing wire core, so that the fire danger position can be accurately calculated according to the conduction length of the temperature sensing wire core, and the dangerous case can be timely eliminated.
(2) The temperature sensing frame is clamped in the clamping groove, so that the temperature sensing frame is simple to mount and convenient to produce.
(3) When the temperature sensing frame is in the second form, the arc-shaped groove is attached to the side wall of the temperature sensing wire core, so that the contact area between the temperature sensing frame and the temperature sensing wire core can be increased, the influence of the contact position on the resistance value is reduced, and the accuracy of fire danger position calculation is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings, which are required to be used in the embodiments, will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.
Fig. 1 is a schematic cross-sectional view of a temperature-sensing power supply cable according to an embodiment of the present invention;
fig. 2 is a front sectional view of the temperature-sensitive power supply cable shown in fig. 1;
FIG. 3 is a schematic perspective view of the temperature sensing frame shown in FIG. 1;
reference numerals:
1-an electric wire core, 2-a temperature sensing wire core, 3-an insulating layer, 31-a clamping groove, 32-an accommodating groove, 4-an outer sheath, 41-a length scale mark, 5-a shielding layer, 6-a temperature sensing frame, 61-an arc groove, 71-a first form and 72-a second form.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby. It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the utility model pertains.
In the description of the present application, it is to be understood that the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1 to 3, in an embodiment of the temperature-sensing power supply cable, the core 1, the two sets of temperature-sensing cores 2, the insulating layer 3, the outer sheath 4 and the temperature-sensing frame 6 are included, so that when fire is monitored, the influence of temperature on the resistance value of a legal person after the conduction is small, the fire position can be conveniently inferred, and the dangerous case can be timely eliminated.
Specifically, the power supply wire core 1, the temperature sensing wire core 2 and the insulating layer 3 are wrapped in the outer sheath 4. The insulating layer 3 isolates the power supply wire core 1 and the temperature sensing wire core 2 respectively. The power supply wire core 1 and the temperature sensing wire core 2 are made of conductive materials such as copper and aluminum and are used for conducting electricity. The power supply wire core 1 can be single or multiple. The insulating layer 3 keeps apart each power supply sinle silk 1 and temperature sensing sinle silk 2 respectively, prevents to switch on each other between power supply sinle silk 1, the temperature sensing sinle silk 2. The insulating layer 3 can be made of PVC, PE, PP and other plastic insulating materials. The outer sheath 4 may be made of plastic insulating material, rubber, etc. It can be understood that the power supply wire core 1, the temperature sensing wire core 2, the insulating layer 3 and the outer sheath 4 can all be made of the same material as the existing power transmission cable. In one embodiment, the outer sheath 4 is further provided with a shielding layer 5, and the shielding layer 5 is wrapped outside the power supply wire core 1, the temperature sensing wire core 2 and the insulating layer 3. The shielding layer 5 is used for resisting external electromagnetic interference or electromagnetic radiation of the cable itself when transmitting power. The structure and the material of the cable can be referred to the existing common cable.
A temperature sensing frame 6 made of memory alloy is arranged in the insulating layer 3. The temperature sensing frame 6 is arranged between the two temperature sensing wire cores 2, and the temperature sensing frame 6 is arranged at intervals along the temperature sensing wire cores 2. The temperature-sensing frame 6 has a first shape 71 when the temperature is lower than the phase transition temperature of the memory alloy, and the temperature-sensing frame 6 has a second shape 72 when the temperature is higher than the phase transition temperature of the memory alloy. The temperature sensing frame 6 is in the first form 71 to keep the two temperature sensing wire cores 2 disconnected, and the temperature sensing frame 6 is in the second form 72 to make the two temperature sensing wire cores 2 conducted. Specifically, the temperature sensing frame 6 is arranged along the whole length of the cable at intervals along with the temperature sensing wire core 2. The shape of the temperature sensing frame 6 is made by using the characteristics of the memory alloy, the temperature sensing frame 6 is made into the second shape 72 at a high temperature exceeding the transformation temperature of the memory alloy, and then is plastically deformed into the first shape 71 at a temperature lower than the transformation temperature of the memory alloy. The memory alloy material components are selected according to the use environment, nickel-titanium memory alloy, copper-zinc memory alloy and the like can be selected, the phase transition temperature of the memory alloy is related to the mass fraction of the alloy elements, and the temperature sensing frame 6 can have different phase transition temperature temperatures through different proportions of the alloy elements, so that the memory alloy material is suitable for different working environments.
When in use, the monitoring terminal is connected with the temperature sensing wire core 2. When a fire occurs to raise the temperature of the temperature sensing frame 6 to reach the phase transition temperature of the memory alloy, the temperature sensing frame 6 changes from the first form 71 to the second form 72, and the two groups of temperature sensing wire cores 2 are conducted. The influence of the environmental temperature on the resistance value of the temperature sensing frame 6 made of the memory alloy is small, and the resistance value of the temperature sensing wire core 2 connected into the circuit is mainly determined by the conduction length of the temperature sensing wire core 2. The monitoring terminal can calculate the length of the conducting temperature sensing wire core 2 according to the resistivity of the temperature sensing wire core 2 according to the detected current, so that the fire danger position can be accurately calculated according to the conducting length of the temperature sensing wire core 2, and the dangerous case can be timely eliminated.
In one embodiment, the outer sheath 4 is provided with length scale lines 41. Thereby the cable length that each installation site of record that can be convenient corresponds when the cable installation, location when being convenient for later stage investigation.
In one embodiment, the temperature sensitive wire core 2 is disposed in parallel within the insulation layer 3. The temperature sensing frame 6 is U-shaped, and the middle part of the temperature sensing frame 6 is tightly arranged on the insulating layer 3 between the temperature sensing wire cores 2. When the temperature sensing frame 6 is in the first shape 71, the two sides of the temperature sensing frame 6 are respectively far away from the two temperature sensing wire cores 2. When the temperature sensing frame 6 is in the second form 72, both sides of the temperature sensing frame 6 are respectively abutted against the two temperature sensing cores 2. The temperature sensing frame 6 is abutted against the two temperature sensing wire cores 2 at the same time, so that the two temperature sensing wire cores 2 are conducted. Specifically, the insulating layer 3 between the temperature sensing wire cores 2 is provided with a clamping groove 31. The card slot 31 has two ends respectively provided with a receiving groove 32. The side walls of the temperature sensing wire core 2 are respectively and partially arranged in the accommodating groove 32. The middle part of the temperature sensing frame 6 is clamped in the clamping groove 31, and the two sides of the temperature sensing frame 6 are respectively arranged in the accommodating grooves 32. The temperature sensing frame 6 is clamped in the clamping groove 31, so that the installation is simple and the cable production is convenient. In one embodiment, the temperature sensing frame 6 is formed in a U-shaped sheet structure. The clamping groove 31 is arranged corresponding to the thickness of the temperature sensing frame 6, and the installation is simple and stable.
In one embodiment, the temperature sensing frame 6 is further provided with arc-shaped grooves 61 on both sides. The temperature sensing frame 6 is in the second shape 72, so that the arc-shaped groove 61 can be attached to the side wall of the temperature sensing wire core 2. The arc wall 61 is laminated with the side wall of the temperature sensing wire core 2, the contact area of the temperature sensing frame 6 and the temperature sensing wire core 2 is increased, the influence of the contact position on the resistance value is reduced, and the accuracy of fire danger position calculation is improved.
According to the temperature sensing power supply cable in the technical scheme, when the temperature sensing power supply cable is used, the power supply wire core 1 is connected with a power supply and an electric appliance, and the temperature sensing wire core 2 is connected with the monitoring terminal. When a fire occurs to raise the temperature of the temperature sensing frame 6 to reach the phase transition temperature of the memory alloy, the temperature sensing frame 6 changes from the first form 71 to the second form 72, and the two groups of temperature sensing wire cores 2 are conducted. The influence of the environmental temperature on the resistance value of the temperature sensing frame 6 made of the memory alloy is small, the resistance values of the temperature sensing frames 6 at all positions are basically unchanged, and the total resistance value of the circuit connected to the temperature sensing wire core 2 is determined by the conduction length of the temperature sensing wire core 2. The monitoring terminal can calculate the length of the conducting temperature sensing wire core 2 according to the resistivity of the temperature sensing wire core 2 according to the detected current, so that the fire danger position can be accurately calculated according to the conducting length of the temperature sensing wire core 2, the influence of the temperature on the calculated fire danger position is effectively eliminated, and the dangerous case can be timely and accurately checked.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (7)
1. A temperature sensing power supply cable is characterized by comprising a power supply wire core, two groups of temperature sensing wire cores, an insulating layer and an outer sheath, wherein the power supply wire core, the temperature sensing wire cores and the insulating layer are wrapped in the outer sheath; the temperature sensing frame has a first shape when the temperature is lower than the phase change temperature of the memory alloy, the temperature sensing frame has a second shape when the temperature is higher than the phase change temperature of the memory alloy, the temperature sensing frame is in the first shape and can keep the two temperature sensing wire cores disconnected, and the temperature sensing frame is in the second shape and can enable the two temperature sensing wire cores to be connected.
2. The temperature-sensing power supply cable according to claim 1, wherein a shielding layer is further disposed in the outer sheath, and the shielding layer is wrapped outside the power supply core, the temperature-sensing core and the insulating layer.
3. The temperature-sensing power supply cable according to claim 1, wherein the temperature-sensing wire cores are arranged in parallel in the insulating layer, the temperature-sensing frame is U-shaped, and the middle part of the temperature-sensing frame is fastened to the insulating layer between the temperature-sensing wire cores; when the temperature sensing frame is in the first form, the two sides of the temperature sensing frame are respectively far away from the two temperature sensing wire cores, and when the temperature sensing frame is in the second form, the two sides of the temperature sensing frame are respectively abutted against the two temperature sensing wire cores.
4. The temperature-sensing power supply cable according to claim 3, wherein a clamping groove is formed on the insulating layer between the temperature-sensing wire cores, receiving grooves are formed at both ends of the clamping groove, the side walls of the temperature-sensing wire cores are partially disposed in the receiving grooves, respectively, the middle portion of the temperature-sensing holder is clamped in the clamping groove, and both sides of the temperature-sensing holder are disposed in the receiving grooves, respectively.
5. The temperature-sensing power supply cable according to claim 4, wherein arc-shaped grooves are respectively formed on two sides of the temperature-sensing frame, and the arc-shaped grooves are attached to the side walls of the temperature-sensing wire core when the temperature-sensing frame is in the second state.
6. The temperature-sensitive power supply cable according to claim 2, wherein the temperature-sensitive mount is formed in a U-shaped sheet structure.
7. The temperature-sensitive power supply cable according to claim 1, wherein the outer sheath is provided with length scale marks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122916173.6U CN216562523U (en) | 2021-11-25 | 2021-11-25 | Temperature sensing power supply cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122916173.6U CN216562523U (en) | 2021-11-25 | 2021-11-25 | Temperature sensing power supply cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216562523U true CN216562523U (en) | 2022-05-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122916173.6U Active CN216562523U (en) | 2021-11-25 | 2021-11-25 | Temperature sensing power supply cable |
Country Status (1)
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|---|---|
| CN (1) | CN216562523U (en) |
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2021
- 2021-11-25 CN CN202122916173.6U patent/CN216562523U/en active Active
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