CN212458705U - Cable joint temperature detection device - Google Patents
Cable joint temperature detection device Download PDFInfo
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- CN212458705U CN212458705U CN202021630293.9U CN202021630293U CN212458705U CN 212458705 U CN212458705 U CN 212458705U CN 202021630293 U CN202021630293 U CN 202021630293U CN 212458705 U CN212458705 U CN 212458705U
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Abstract
The utility model belongs to the technical field of electrical safety, and discloses a cable joint temperature detection device, which is used for being sleeved on the surface of a cable joint and positioning an abnormal temperature rise region through a built-in structure, and comprises a plurality of strip conductors with heat-sensitive characteristics, wherein the strip conductors are connected with an external detection circuit; when the current change of one of the strip conductors reaches a threshold value, determining that the area where the strip conductor is located is an abnormal temperature rise area; and when the current change of at least two of the strip conductors reaches a threshold value, determining that a point closest to the strip conductor with the current change reaching the threshold value is an abnormal temperature rise area. The utility model discloses a conductor structure of bar covers on the cable joint surface, and the corresponding region of cable joint is confirmed through the bar conductor that the detection circuitry who confirms to produce alarm signal corresponds, compares and has higher stability and accuracy nature in current temperature measurement structure.
Description
Technical Field
The utility model belongs to the technical field of electrical safety, concretely relates to cable joint temperature-detecting device.
Background
The cable connector is also called a cable head. After the cable is laid, the sections of the cable must be connected together in order to form a continuous line, and these connections are called cable connectors. The cable joints at the middle of the cable run are called intermediate joints and the cable joints at the two ends of the run are called termination joints. The cable joint is used for locking and fixing the incoming and outgoing lines, and plays a role in water resistance, dust prevention and vibration prevention.
The existing cable joint is easy to cause accidents because some electrical installation constructors often do not pay attention to the installation quality when laying electric wires. Uncased where an insulating sleeve should be used; the junction box is not arranged at the position where the junction box is used; even at the wire connection, a hinge method is not used, but a hook-shaped connection method against regulation is used. The hook-shaped connecting method has large contact resistance, and can cause the nearby wood boards to be gradually dried and carbonized due to continuous heating during electrification, and finally, the wood boards are burnt to cause fire.
The heating of the wire connector not only causes a large amount of electric energy loss, but also seriously affects the normal work of the electrical equipment, so that the working current in the line is increased, the service life of the electrical equipment is shortened, the ongoing production, scientific research, medical operation and other activities are suddenly interrupted, and fire, electric shock accidents and the like are caused, thereby causing loss which is difficult to estimate.
The existing temperature detection modes for the buried cable are more, and specifically include temperature sensing cable type temperature measurement, thermistor type temperature measurement, infrared sensing type temperature measurement, thermocouple type temperature measurement, integrated circuit type temperature measurement, optical fiber distributed temperature monitoring and the like, wherein optical fiber distributed type is common detection equipment, and the optical fiber distributed type is widely applied due to the fact that the arrangement cost of the optical fiber distributed type detection equipment in a structure with a long span is low, and the precision is high. However, the above detection methods including the optical fiber distribution type cannot provide a better solution when an accurate abnormal temperature rise region at the cable joint needs to be obtained. If the precision needs to be improved, more sensors need to be arranged, the cost is high, the stability in practical use is poor, and high-frequency maintenance is needed.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that prior art exists, the utility model provides a novel detect structure has simple structural design, and not only stability is higher, and can improve and detect the precision, confirms that specific unusual temperature rise is regional.
The utility model discloses the technical scheme who adopts does:
a cable joint temperature detection device is used for being sleeved on the surface of a cable joint to position an abnormal temperature rise area through a built-in structure,
the detection circuit comprises a plurality of strip conductors with thermosensitive characteristics, wherein the strip conductors are connected with an external detection circuit;
when the current change of one of the strip conductors reaches a threshold value, determining that the area where the strip conductor is located is an abnormal temperature rise area;
and when the current change of at least two of the strip conductors reaches a threshold value, determining that a point closest to the strip conductor with the current change reaching the threshold value is an abnormal temperature rise area.
It is worth explaining, the cable joint that the utility model relates to in mainly buries the structure in underground cable well underground, and its appearance is similar to set up the inflation end on the cable, and the utility model provides a structure is then the parcel in current shaping cable joint outside, also can set up in the cable when the cable is laid.
The temperature measuring main body is a strip conductor, and the strip is an external characteristic limiting the conductor structure to have linearity, namely a certain length. Generally, in practical application, the cable is a wire body or a strip-shaped sheet around a cable joint, and the main purpose of the cable is to form a matrix by matching a plurality of strip conductors, wherein the matrix has a certain density and induces a local abnormal temperature rise which may occur by wrapping the surface of the cable joint.
Because the resistance of the strip conductor with the thermosensitive characteristic can be changed due to the temperature change, the utility model discloses do not limit the change mode of its resistance, then as long as satisfy that temperature and resistance are regular change can.
Because the plurality of strip conductors are arranged in parallel and in an intersecting mode, but each strip conductor is an independent conductor, the intersecting mode is a staggered overlapping mode, and in order to reduce the thickness as much as possible, the strip conductors can be directly overlapped and contacted, and the insulating materials are arranged at the contact positions to prevent the strip conductors from conducting electricity with each other.
And applying an independent detection circuit on each strip conductor, and monitoring the temperature change by detecting the resistance value change of each strip conductor. If local temperature changes occur, the strip conductor part closest to the temperature rise point firstly receives heat transfer and raises the temperature, and the resistance parameter is quickly reflected. By setting a threshold of the variation, after the resistance value or the resistance variation rate reaches the threshold, the corresponding external detection circuit generates alarm information and transmits the alarm information to the corresponding terminal equipment or server.
Because the plurality of strip conductor structures are arranged on the surface of the cable joint for uniform covering, once local abnormal temperature rise occurs, at least two adjacent strip conductors can be caused to exceed the threshold value certainly. The surface of the cable joint is regarded as a curved surface, and the area can be accurately positioned through at least two lines on the curved surface.
If two strip conductors are crossed, the heating point is always at the intersection point or the position closest to the strip conductor with abnormally changed resistance value.
Through above-mentioned structure can be effectual fix a position the region that generates heat, then provide support for leading disaster hidden danger is taken precautions against and is investigated and examined, also can provide the analysis evidence to the accident reason after the conflagration breaks out. Compared with the existing temperature measurement mode, the temperature measurement device is simple in structure, convenient to arrange and free of influence on the original structure of the cable connector. And a large number of thermosensitive conductors with lower cost are adopted as a basis, so that the manufacturing and maintenance cost is reduced.
Further, at least two strip conductors are overlapped in an insulating mode to form an intersection point; and determining the intersection point as an abnormal temperature rise area after the current change on the two crossed strip conductors reaches a set threshold value.
The insulating superposition means that two strip conductors are attached in a staggered mode and keep insulating, and an insulating layer is arranged between the two strip conductors to guarantee a good isolation effect and prevent signal interference.
Further, the strip conductors are arranged in parallel. If the strip conductors are arranged in parallel, a plurality of independent plates can be arranged in a mode of distinguishing areas or semi-surrounding and the like by setting a proper distance and a proper length, so that the thickness is reduced as much as possible, and the strip conductors can be positioned similarly.
Because the heating device is arranged in a parallel and side-by-side mode, the resistance values of at least two strip conductors around the heating position can be changed abnormally, the accurate spacing distance value of the heating point between the strip conductors can be obtained through algorithm calculation according to the distance between the adjacent strip conductors and the specific resistance value change amplitude, and a strip area which is parallel to the strip conductors and is equal in length is theoretically determined.
The detection device further comprises at least two detection layers, wherein each detection layer comprises a plurality of strip conductors which are arranged in parallel;
the detection layers are mutually insulated and attached, and projections of the strip conductors in the adjacent detection layers in the same parallel plane are intersected.
Each layer of detection layer covers the cable joint completely, and accurate positioning is carried out through two layers of overlapped and staggered strip conductors.
Furthermore, the device comprises two detection layers, and the projections of the strip conductors in the two detection layers in the same parallel plane are vertical;
and determining the intersection point as an abnormal temperature rise area after the current change on the two strip conductors belonging to different detection layers reaches a set threshold value.
Further, the device comprises n detection layers, wherein the included angle between the projections of the strip conductors in the adjacent detection layers in the same parallel plane is
And after the current change on at least three strip conductors belonging to different detection layers reaches a set threshold value, determining a point closest to an intersection point between the strip conductors with the current change reaching the threshold value as an abnormal temperature rise region.
Furthermore, the detection layer also comprises an insulating layer, and the strip conductors belonging to the same detection layer are all arranged on the insulating layer.
Further, the strip conductor is a conductive solid structure adhered on the insulating material.
Further, the strip conductor is conductive paste sprayed or printed on the insulating material;
the conductive paste sprayed or printed on the insulating material belongs to one or more of the following:
positive temperature coefficient resistance paste; or
Negative temperature coefficient resistance paste.
Further, the strip conductor comprises the following connection modes:
the strip conductor is connected with an external detection circuit by adopting an independent cable; or
The strip conductor is connected with the external detection circuit through a uniform flat cable.
The utility model has the advantages that:
(1) the utility model discloses a bar conductor structure covers on the cable joint surface to adopt independent outside detection circuitry to carry out resistance to every bar conductor and detect, in case local unusual temperature rise appears, can lead to its nearest single strip or many bar conductors resistance near to change, then confirm the corresponding region of cable joint through confirming the bar conductor that produces alarm signal's detection circuitry corresponds, have higher stability and accuracy compared with current temperature measurement structure;
(2) the utility model realizes fast package through single-layer or multi-layer detection layer structure, and adopts clamping hoop and other modes for fixing, thus the existing cable joint can be installed additionally, or can be arranged inside the cable joint directly when laying the cable, thus having higher flexibility and better assembly and disassembly efficiency;
(3) the utility model discloses an integral type winding displacement connection design to adopt single chip to correspond a plurality of bar conductors, thereby reduce the space occupancy of equipment as far as possible, reduction in production and maintenance cost.
Drawings
FIG. 1 is a schematic axial view of the entire detecting device of the present invention being sleeved on a cable joint;
FIG. 2 is a side view of the entire detecting device of the present invention sleeved on a cable connector;
FIG. 3 is a schematic view of the present invention taken along line A-A in FIG. 2;
FIG. 4 is a schematic view of the present invention taken along line B-B in FIG. 2;
FIG. 5 is an isometric view of the body of the present invention cut along the central axis;
fig. 6 is a grid diagram of the detection apparatus in embodiment 4 of the present invention after being unfolded;
fig. 7 is a schematic diagram of positioning an abnormal temperature rise point in embodiment 4 of the present invention, in which each detection layer is composed of twelve strip conductors;
fig. 8 is a grid diagram of the detection apparatus according to embodiment 3 of the present invention after being spread out.
In the figure: 1-strip conductor, 2-insulating layer.
Detailed Description
The present invention will be further explained with reference to the drawings and the embodiments.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of the application is used, the description is only for convenience and simplicity, and the indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present application. Furthermore, the appearances of the terms "first," "second," and the like in the description herein are only used for distinguishing between similar elements and are not intended to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like when used in the description of the present application do not require that the components be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Example 1:
due to the great popularization of buried cables, technologies for safety monitoring and management of the buried cables are also developed. Compared with the cable structure on the ground, the cable structure on the ground can be directly discovered after a fault occurs, or an abnormal state which may cause potential safety hazard can be easily perceived. However, due to the particularity of buried cables, only sensors can be relied on for condition monitoring.
The temperature of the cable is increased after the cable breaks down, and once the cable breaks down, the temperature rising rate is high due to the high voltage of the cable, so that the cable can directly cause fire when the cable does not react. The existing temperature detection mode can only monitor the temperature of the whole body, and cannot effectively monitor the local temperature rise generated when the fault starts.
This embodiment is in order to solve the inaccurate problem of current buried cable joint temperature detection structure, through arranging a plurality of strip conductors 1 in the joint position that produces the trouble hidden danger in the probability and solve.
In particular, it comprises a plurality of strip conductors 1, fixed to the cable joint surface by means of an externally applied insulating material. The cable joint in this embodiment is a fixed structure that has been assembled and applied, and is disposed by being directly wrapped on the outer surface thereof.
The strip conductor 1 is made of a metal wire with heat-sensitive characteristics, the metal wire with the same length is wound on the surface of the cable connector at equal intervals, the cable connector is wrapped and fixed by rubber insulating materials, and at the moment, two pins of the metal wire are exposed and controlled to be at the same side as much as possible. The metal pins of the strip conductor 1 are connected to an externally provided detection circuit, i.e. a single chip circuit with a power supply, by separate wires having an insulating layer 2. The single STM32F103 chip is used for carrying out resistance test on the strip conductors 1, an external signal sending mechanism receives signals of the single chip microcomputer and sends the signals to a remote server in real time, and the server collects the single chip microcomputers and marks each single chip microcomputer to indicate the corresponding setting position of the single chip microcomputer.
Specifically, all bar conductors 1 all set up around cable joint's axis equidistance in this embodiment, because equidistant arranging, then in case local abnormal temperature rise appears, the resistance of nearest many bar conductors 1 can change rapidly, and the server receives behind the alarm signal can carry out the feedback on signal transmission to the maintainer's in this area terminal equipment, and that sends in the lump still includes this cable joint's position and specific temperature rise position information.
The temperature rise position information is that a plurality of areas are uniformly divided on the outer surface of the cable joint originally, and each area is marked. Each region corresponding to one or more strip conductors 1, adjacent regions may overlap. But depending on the alarm threshold set, the alarm threshold may comprise a specific temperature variation value and the number of strip conductors 1 reaching the threshold. The alarm device is characterized in that the alarm device can correspond to a plurality of strip conductors 1 at certain time, the area most likely to have abnormal temperature rise is determined according to the corresponding proportion, the number information corresponding to the area is sent to the terminal equipment of a maintainer, and the maintainer can directly check and repair the corresponding area of the cable connector after reaching the site.
Because the outside parcel has rubber insulation material, can be with regional serial number printing in its surface, make things convenient for maintainer location. Compared with the prior art, the technology of the embodiment can avoid the problem that the fire disaster caused by the abnormal local temperature rise cannot be found in time.
Example 3:
this embodiment is in order to solve cable joint's accurate temperature measurement problem, provides a cable joint temperature-detecting device, and its cover is established at cable joint surface and fixes a position the regional location of the unusual temperature rise that appears through built-in structure.
Specifically, the device comprises a plurality of strip conductors 1 with heat-sensitive characteristics, and each strip conductor 1 is connected with an external detection circuit.
Wherein the strip conductors 1 are arranged in parallel. If the strip conductors 1 are arranged in parallel, a plurality of independent plates can be arranged in a manner of distinguishing areas or semi-surrounding and the like by setting a proper distance and a proper length, so that the thickness is reduced as much as possible, and the strip conductors can be positioned similarly.
Because the heating device is arranged in a parallel and side-by-side mode, the resistance values of at least two strip conductors 1 around the heating position can be changed abnormally, the accurate spacing distance value of the heating point between the strip conductors 1 can be obtained through algorithm calculation according to the distance between the adjacent strip conductors 1 and the specific resistance value change amplitude, and a strip area which is parallel to the strip conductors 1 and is equal in length is theoretically determined.
Example 3:
in order to solve the problem of accurate temperature measurement of the cable connector, the embodiment also provides a cable connector temperature detection device, as shown in fig. 8, which is sleeved on the surface of the cable connector and positions the abnormal temperature rise region through a built-in structure.
The detection device specifically comprises a plurality of strip conductors 1 with thermosensitive characteristics, wherein the strip conductors 1 are connected with an external detection circuit; the detection device comprises at least two detection layers, wherein each detection layer comprises a plurality of strip conductors 1 which are arranged in parallel; the detection layers are mutually insulated and attached, and the projections of the strip conductors 1 in the adjacent detection layers in the same parallel plane are intersected.
Each layer of detection layer covers the cable joint completely and carries out accurate positioning through two layers of overlapped and staggered strip conductors 1.
In particular, 3 detection layers are included, wherein the angle between the projections in the same parallel plane between the strip conductors 1 in adjacent detection layers is 60 °.
After the current change on the three strip conductors 1 belonging to different detection layers reaches a set threshold value, determining that the point closest to the intersection point between the strip conductors 1 with the current change reaching the threshold value is an abnormal temperature rise region.
The detection layer also comprises an insulating layer 2, and the strip conductors 1 belonging to the same detection layer are all arranged on the insulating layer 2.
In this embodiment, the strip conductor 1 is a conductive paste sprayed on the insulating material, and the strip conductor 1 is connected with the external detection circuit through a uniform flat cable.
Example 4:
in order to solve the problem of accurate temperature measurement of the cable connector, the present embodiment also provides a cable connector temperature detection apparatus, as shown in fig. 1 to 7, which is sleeved on the surface of the cable connector and locates the abnormal temperature rise region through a built-in structure.
The detection device specifically comprises a plurality of strip conductors 1 with thermosensitive characteristics, wherein the strip conductors 1 are connected with an external detection circuit; the detection device comprises at least two detection layers, wherein each detection layer comprises a plurality of strip conductors 1 which are arranged in parallel; the detection layers are mutually insulated and attached, and the projections of the strip conductors 1 in the adjacent detection layers in the same parallel plane are intersected.
Each layer of detection layer covers the cable joint completely and carries out accurate positioning through two layers of overlapped and staggered strip conductors 1.
Specifically, the device comprises two detection layers, wherein projections of strip conductors 1 in the two detection layers in the same parallel plane are vertical; and determining the intersection point as an abnormal temperature rise area after the current change on the two strip conductors 1 belonging to different detection layers reaches a set threshold value.
The cable joint in the embodiment is mainly a structure buried in an underground cable well, the appearance of the cable joint is an expanded end which is similar to that of the cable joint, and the structure in the embodiment is wrapped outside the existing molded cable joint and can also be arranged in the cable when the cable is laid. The temperature measuring main body is a strip conductor 1, and the strip is used for limiting the conductor structure to have linear external characteristics, namely a certain length. Generally, in practical application, the cable is a wire body or a strip-shaped sheet around a cable joint, and the main purpose of the cable is to form a matrix by matching a plurality of strip-shaped conductors 1, wherein the matrix has a certain density, and the matrix is wrapped on the surface of the cable joint to sense the local abnormal temperature rise which may occur.
Since the resistance of the strip conductor 1 with thermal sensitivity changes due to temperature changes, it should be noted that the present embodiment does not limit the change manner of the resistance, and only needs to satisfy the requirement that the temperature and the resistance change regularly. And an independent detection circuit is applied to each strip conductor 1 to monitor the temperature change by detecting the resistance value change of each strip conductor 1. If a local temperature change occurs, the portion of the strip conductor 1 closest to the temperature rise point will first receive heat transfer and heat up, and will quickly reflect on the resistance parameter.
By setting a threshold of the variation, after the resistance value or the resistance variation rate reaches the threshold, the corresponding external detection circuit generates alarm information and transmits the alarm information to the corresponding terminal equipment or server.
The structure that a plurality of strip conductors 1 are arranged on the surface of the cable joint for uniform covering is adopted, so that once local abnormal temperature rise occurs, the temperature rise of at least two adjacent strip conductors 1 is surely caused to exceed a threshold value. The cable joint surface is a two-dimensional curved surface structure, and the area can be accurately positioned through at least two lines on the curved surface. If two strip conductors 1 are crossed, the heating point is always at the intersection point or the position closest to the strip conductor 1 with abnormally changed resistance value.
In the embodiment, the structure is mainly a single-layer covering structure, wherein two strip conductors 1 are insulated and superposed to form an intersection point; and determining the intersection point as an abnormal temperature rise region after the current change on the two crossed strip conductors 1 reaches a set threshold value. The insulation superposition means that the two strip conductors 1 are attached in a staggered mode and keep insulation, and an insulation layer 2 is arranged between the two strip conductors 1 substantially to guarantee a good isolation effect and prevent signal interference. Unlike embodiment 1, in this embodiment, a single-layer staggered array structure is formed, so that small square areas which are relatively dense and uniformly distributed can be formed.
Preferably, in the present embodiment, each strip conductor 1 is a conductive paste directly sprayed on the same insulating material, and the coating method is as follows:
the surface of a single layer of insulating material is uniformly coated at equal intervals according to a design drawing, so that a strip-shaped electric conductor is formed. And then the insulating glue is used for uniformly covering, so that an insulating gap is formed to ensure that the strip conductors 1 cannot be interfered with each other. After the insulating glue is stable, a plurality of conductors are coated in parallel and at equal intervals from the other direction, and finally, an insulating material is covered to form a single-layer structure.
The material in this embodiment is a bendable rectangular sheet body after being completely unfolded, the insulating material is exposed at both ends of each strip conductor 1, each strip conductor 1 is connected with an independent external detection circuit by using a wire independently provided with an insulating layer 2, and a high-temperature-resistant sealant is used for covering edges.
The present invention is not limited to the above-mentioned alternative embodiments, and various other products can be obtained by anyone under the teaching of the present invention. The above detailed description should not be taken as limiting the scope of the invention, which is defined in the following claims, and which can be used to interpret the claims.
Claims (10)
1. The utility model provides a cable joint temperature-detecting device for the cover is established and is passed through built-in structure and to the regional location of the unusual temperature rise that appears in cable joint surface, its characterized in that:
the device comprises a plurality of strip conductors (1) with heat-sensitive characteristics, wherein the strip conductors (1) are connected with an external detection circuit;
when the current change of one of the strip conductors (1) reaches a threshold value, determining that the area where the strip conductor (1) is located is an abnormal temperature rise area;
when the current change of at least two of the strip conductors (1) reaches a threshold value, determining that the point closest to the strip conductor (1) with the current change reaching the threshold value is an abnormal temperature rise area.
2. The cable joint temperature detection device according to claim 1, wherein:
wherein at least two strip conductors (1) are overlapped in an insulating way to form an intersection point; and determining the intersection point as an abnormal temperature rise region after the current change on the two crossed strip conductors (1) reaches a set threshold value.
3. The cable joint temperature detection device according to claim 1, wherein:
wherein the strip conductors (1) are arranged in parallel.
4. The cable joint temperature detection device according to claim 1, wherein:
comprises at least two detection layers, wherein the detection layer of each layer comprises a plurality of strip conductors (1) which are arranged in parallel;
the detection layers are mutually insulated and attached, and the projections of the strip conductors (1) in the adjacent detection layers in the same parallel plane are intersected.
5. The cable joint temperature detection device according to claim 4, wherein: the device comprises two detection layers, wherein projections of strip conductors (1) in the two detection layers in the same parallel plane are vertical;
and determining the intersection point as an abnormal temperature rise area after the current change on the two strip conductors (1) belonging to different detection layers reaches a set threshold value.
6. The cable joint temperature detection device according to claim 4, wherein: comprising n detection layers, wherein the angle between the projections in the same parallel plane between the strip conductors (1) in adjacent detection layers is
After the current change on at least three strip conductors (1) belonging to different detection layers reaches a set threshold value, determining that a point closest to an intersection point between the strip conductors (1) with the current change reaching the threshold value is an abnormal temperature rise region.
7. The cable joint temperature detection device according to claim 4, wherein: the detection layer also comprises an insulating layer (2), and the strip conductors (1) belonging to the same detection layer are all arranged on the insulating layer (2).
8. A cable joint temperature detection apparatus according to any one of claims 1 to 7, wherein: the strip conductor (1) is a conductive solid structure adhered to an insulating material.
9. A cable joint temperature detection apparatus according to any one of claims 1 to 7, wherein: the strip conductor (1) is conductive slurry sprayed or printed on an insulating material;
the conductive paste sprayed or printed on the insulating material belongs to one or more of the following:
positive temperature coefficient resistance paste; or
Negative temperature coefficient resistance paste.
10. A cable joint temperature detection apparatus according to any one of claims 1 to 7, wherein: the strip conductor (1) comprises the following connection modes:
the strip conductor (1) is connected with an external detection circuit by adopting an independent cable; or
The strip conductor (1) is connected with an external detection circuit through a uniform flat cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021630293.9U CN212458705U (en) | 2020-08-07 | 2020-08-07 | Cable joint temperature detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021630293.9U CN212458705U (en) | 2020-08-07 | 2020-08-07 | Cable joint temperature detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212458705U true CN212458705U (en) | 2021-02-02 |
Family
ID=74476838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021630293.9U Expired - Fee Related CN212458705U (en) | 2020-08-07 | 2020-08-07 | Cable joint temperature detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212458705U (en) |
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2020
- 2020-08-07 CN CN202021630293.9U patent/CN212458705U/en not_active Expired - Fee Related
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Granted publication date: 20210202 Termination date: 20210807 |