High-temperature early-warning insulating sheath

Abstract

The invention discloses a high-temperature early-warning insulating sheath, and relates to the technical field of electric power and electrical equipment, and the high-temperature early-warning insulating sheath is characterized in that two groups of shells are combined and wrap the end of an electric wire and cable, and the two shells are hinged to each other; the shell is provided with the thermosensitive structure, and the thermosensitive structure loses efficacy when the end head of the electric wire and cable is heated; the limiting structures are distributed on the shells and used for limiting, and when the thermosensitive structure loses efficacy, the limiting structures are removed, and the two shells are bounced off by springs distributed at the closed positions of the shells. According to the invention, when the internal wire and cable is heated, the outer shell directly falls off, an early warning signal is more accurately given out, the inner layer can still protect the end of the wire and cable, the thermosensitive structure can be independently replaced, the shell is repeatedly used, and the maintenance cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of power and electrical equipment technology, specifically to a high-temperature warning insulating sheath for cable and wire ends. Background Technology

[0002] Insulating sheaths are commonly used at cable joints in transformers or other related power fields to provide insulation and protect the cable ends from corrosion. However, conventional insulating sheaths have the following problems: the sheaths are usually made of silicone or plastic, but prolonged overheating can cause the material to age or even burn out, potentially leading to secondary faults. Moreover, when the cable overheats, the sheath cannot visually reflect the overheating, requiring infrared detection or manual inspection, which is inefficient and prone to overlooking potential problems.

[0003] In the prior art, Chinese utility model patent CN217468099U discloses a temperature-measuring transformer substation insulation sleeve. By setting a temperature display column on the insulation sleeve, it visually reflects the heating status of internal terminals or the connection points between conductors and terminals in the distribution transformer substation. However, since the temperature display column is fixed to the insulation sleeve, when the cable inside the sleeve heats up, the heat is isolated by the insulation sleeve, causing a lag in temperature display. Furthermore, the temperature display column is more susceptible to external temperature variations. When outdoor sunlight is strong, manual inspection becomes difficult to visually identify, potentially leading to overlooked hazards. Additionally, the relatively complex structure results in higher costs. Summary of the Invention

[0004] The purpose of this invention is to provide a high-temperature warning insulating sleeve to solve the problems in the prior art mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high-temperature early warning insulating sleeve, comprising: The housing is provided in two sets and is wrapped around the end of the wire or cable, and the two housings are hinged together. A thermally sensitive structure is provided on the housing, and the thermally sensitive structure fails when the wire / cable end gets hot. A limiting structure is provided, which is distributed on the housing for limiting the position. When the thermal structure fails, the limiting structure is released, and the two housings are springed apart by springs distributed at the housing closure.

[0006] Preferably, the limiting structure includes two sets of I-beam buckles, one of which has an insert strip, and the other I-beam buckle has a slot on the side facing the insert strip. The insert strip and the slot cooperate to combine the two I-beam buckles, and the combined two I-beam buckles are snapped into the connecting grooves on the two housings.

[0007] Preferably, the heat-sensitive structure is a heat-sensitive composition of 100 parts paraffin wax and 15-25 parts polyethylene wax. This composition is placed in the slot to fix the insert at room temperature. When the melting threshold of the heat-sensitive composition is reached, the insert separates from the slot and the limiting is released.

[0008] Preferably, the melting temperature of the thermosensitive composition is 70-90°C.

[0009] Preferably, the housing is further provided with a heat-conducting plate, and the housing has a slot at the connecting groove to allow the heat-conducting plate to contact the two sets of I-beam buckles for heat conduction.

[0010] Preferably, the limiting structure includes a fixing strap, which wraps around the two housings and engages them to secure the two housings.

[0011] Preferably, one end of the fixing strap is bent to form a snap-fit ​​section, and the other end is provided with a snap-fit ​​groove. After the fixing strap wraps around the two housings, it is limited by the snap-fit ​​section and the snap-fit ​​groove.

[0012] Preferably, the thermal structure is a thermal expansion patch, which consists of two sets respectively disposed on the inner walls of the two housings, and an adhesive layer is provided at the edges of the two thermal expansion patches for bonding. When the wire and cable ends heat up, the thermal expansion patch expands and deforms the fixing tape clamping point to release the limiting.

[0013] Preferably, the thickness of the thermal expansion patch gradually increases from the vicinity of the housing hinge towards the distance from the hinge.

[0014] Preferably, the maximum thickness of the thermal expansion patch is not less than 5 mm.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention enables the outer shell to detach directly when the internal wires and cables heat up, providing a more accurate warning signal. At the same time, the inner layer can still protect the wire and cable ends. Furthermore, the heat-sensitive structure can be replaced separately, and the shell can be reused, reducing maintenance costs. Attached Figure Description

[0016] The accompanying drawings, as part of this invention, are provided to further illustrate the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation thereof. Clearly, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0017] Figure 1 This is a schematic diagram of a high-temperature early warning insulating sheath structure according to the present invention; Figure 2This is a schematic diagram of a high-temperature early warning insulating sheath structure according to the present invention; Figure 3 This is a schematic diagram of a high-temperature early warning insulating sheath structure according to the present invention; Figure 4 This is a schematic diagram of a high-temperature early warning insulating sheath structure according to the present invention; Figure 5 This is a schematic diagram of a high-temperature early warning insulating sheath structure according to the present invention; Figure 6 This is a schematic diagram of a high-temperature early warning insulating sheath structure according to the present invention; Figure 7 This is a schematic diagram of a high-temperature early warning insulating sheath structure according to the present invention.

[0018] In the diagram: 1. Housing; 2. Spring; 3. H-shaped buckle; 4. Insert; 5. Slot; 6. Connecting groove; 7. Thermosensitive composite; 8. Heat-conducting sheet; 9. Fixing strap; 10. Snap-fit ​​section; 11. Snap-fit ​​groove; 12. Thermosensitive expansion sticker. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0020] Please see Figure 1-5 A high-temperature warning insulating sleeve, combined with Figure 1 , Figure 2 and Figure 3 As shown, it includes: a housing 1, a thermal structure and a limiting structure. The housing 1 is wrapped around the end of the wire and cable in two sets and is hinged between the two housings 1. The housing 1 is provided with a thermal structure, which fails when the end of the wire and cable gets hot. The limiting structure is distributed on the housing 1 for limiting. When the thermal structure fails, the limiting structure is released and the two housings 1 are pushed apart by springs 2 distributed at the closing point of the housing 1.

[0021] It should be noted that in this embodiment, the thermal structure, spring, and limiting structure are arranged in three sets, with two sets located at the end away from the hinge of the housing 1, and one set on the back side of the hinge of the housing 1. However, in practical applications, the number of sets may include, but is not limited to, the above-mentioned number, and those skilled in the art can reasonably change the number of sets according to actual needs.

[0022] like Figure 4As shown, for further explanation: the limiting structure includes two sets of I-beam buckles 3, one of which has an insert 4, and the other I-beam buckle 3 has a slot 5 on the side facing the insert 4. The insert 4 and the slot 5 cooperate to combine the two I-beam buckles 3, and the combined I-beam buckle 3 is as follows. Figure 5 As shown, Figure 1 As shown, the combined two I-beam buckles 3 are inserted into the connecting slots 6 on the two housings 1.

[0023] Combination Figure 2 and Figure 3 As shown, the housing 1 is also provided with a heat-conducting plate 8, and the housing 1 has a slot at the connecting groove 6 to allow the heat-conducting plate 8 to contact the two sets of I-beam buckles 3 for heat conduction.

[0024] It should be noted that the heat-sensitive structure is a heat-sensitive composition 7 consisting of 100 parts paraffin wax and 15-25 parts polyethylene wax. This composition is placed inside the slot 5 to fix the insert 4 at room temperature. When the melting threshold of the heat-sensitive composition 7 is reached, the insert 4 separates from the slot 5 and the limiting is released. The melting temperature of the heat-sensitive composition 7 is 70-90℃. The ratio of paraffin wax to polyethylene wax needs to be selected according to the actual diameter of the wire / cable and the ambient temperature, which will not be elaborated here.

[0025] In practice, the two housings 1 are fastened together and installed on the ends of the wires and cables. The I-shaped buckle 3, assembled with the heat-sensitive composition 7, is inserted into the connecting groove 6 of the two housings 1 to limit their position. Since the heat-conducting plate 8 is inside and in direct contact with the wires and cables, the heating is more sensitive and precise.

[0026] When the internal wires and cables heat up, the heat-conducting plate 8 is heated and conducts the heat to the I-shaped buckle 3. The heat-sensitive composition 7 in the I-shaped buckle 3 melts, causing the insert 4 and slot 5 in the I-shaped buckle 3 to separate. The insert 4 and slot 5 are respectively stuck on the two housings 1, and the two housings 1 separate under the action of the spring. This causes the housing 1 to fall off.

[0027] Once the housing 1 detaches, it can be reused; the I-beam buckle 3 can be directly replaced, thereby reducing maintenance costs. Example

[0028] Please see Figure 6 and Figure 7 A high-temperature warning insulating sheath includes: a housing 1, a thermosensitive structure, and a limiting structure. The housing 1 is arranged in two sets and wrapped around the end of the wire or cable, and the two housings 1 are hinged together. The housing 1 is provided with a thermosensitive structure, which fails when the end of the wire or cable gets hot. The limiting structure is distributed on the housing 1 for limiting. When the thermosensitive structure fails, the limiting structure is released, and the two housings 1 are pushed apart by springs 2 distributed at the closing points of the housings 1.

[0029] It should be noted that: in this embodiment, two sets of limiting structures are provided, located at the two ends of the two sets of housings 1 respectively, while the springs are distributed on the side of the two housings 1 away from the hinge.

[0030] As a further explanation: Figure 6 As shown, the limiting structure includes a fixing strap 9, which wraps around the two housings 1 and secures them in place. Wherein, as... Figure 7 As shown, one end of the fixing strap 9 is bent to form a snap-fit ​​section 10, and the other end is provided with a snap-fit ​​groove 11. After the fixing strap 9 wraps around the two housings 1, it is limited by the snap-fit ​​section 10 and the snap-fit ​​groove 11.

[0031] Combination Figure 6 As shown, the thermal structure is a thermal expansion patch 12. The thermal expansion patch 12 is in two sets, which are respectively set on the inner walls of the two housings 1. An adhesive layer is provided at the edges of the two thermal expansion patches 12. When the wire and cable ends are heated, the thermal expansion patch 12 expands and deforms the fixing band 9 at the snap joint to release the limit.

[0032] It should be noted that the thickness of the thermal expansion patch 12 gradually increases from the hinge near the housing 1 towards the distance from the hinge. The maximum thickness of the thermal expansion patch 12 is not less than 5 mm. Those skilled in the art can use, but are not limited to, insulating paper made of expanded graphite, expanding insulating paper made of pure wood pulp, and epoxy resin composite materials for the thermal expansion patch 12.

[0033] In practice, the two housings 1 are fastened together and installed on the ends of the wires and cables. The two thermal expansion adhesives 12 located inside the two housings 1 are wrapped around the ends of the wires and cables by adhesive layer. Then, the fixing strap 9 is wrapped around the two housings 1 and inserted into the locking groove 11 through the locking section 10 for positioning.

[0034] When the internal wires and cables heat up, the thermal expansion patch 12 expands due to the heat. The two housings 1 expand and open outward around the hinge, causing the locking section 10 of the fixing band 9 to deform and separate from the locking groove 11. The two housings 1 are then bounced off by the elastic potential energy of the spring 2, making it easy for maintenance personnel to detect in time. At the same time, the thermal expansion patch 12 is bonded together by the adhesive layer to form a whole. Even if the housing 1 falls off, the thermal expansion patch 12 is still installed at the wiring port, and can still play a certain role in protecting the port and providing insulation against electric shock.

[0035] Once the housing 1 detaches, it can be reused; once the thermal expansion patch 12's thermal expansion performance decreases, it can be directly replaced, thereby reducing maintenance costs.

[0036] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. "A plurality of" means two or more, unless otherwise explicitly specified.

[0037] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0040] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of the invention includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as will be understood by those skilled in the art to which embodiments of the invention pertain.

[0041] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0042] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0043] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0044] Furthermore, the functional units in the various embodiments of the present invention can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0045] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A high-temperature warning insulating sleeve, characterized in that, include: The housing (1) is arranged in two sets and wrapped around the end of the wire and cable, and the two housings (1) are hinged together. The thermal structure is provided on the housing (1), and the thermal structure fails when the wire and cable end gets hot; A limiting structure is distributed on the housing (1) for limiting. When the thermal structure fails, the limiting structure is released, and the two housings (1) are opened by springs (2) distributed at the closing position of the housing (1).

2. The high-temperature early warning insulating sleeve according to claim 1, characterized in that: The limiting structure includes two sets of I-beam buckles (3), one of which has an insert (4) and the other has a slot (5) on the side facing the insert (4). The insert (4) and the slot (5) cooperate to combine the two I-beam buckles (3), and the combined two I-beam buckles (3) are snapped into the connecting groove (6) on the two housings (1).

3. The high-temperature early warning insulating sleeve according to claim 2, characterized in that: The thermosensitive structure is a thermosensitive composition (7) consisting of 100 parts paraffin wax and 15-25 parts polyethylene wax. The composition is placed inside the slot (5) to fix the insert (4) at room temperature. When the melting threshold of the thermosensitive composition (7) is reached, the insert (4) separates from the slot (5) and is released from its limiting position.

4. The high-temperature early warning insulating sleeve according to claim 3, characterized in that: The melting temperature of the thermosensitive composition (7) is 70-90℃.

5. The high-temperature warning insulating sleeve according to any one of claims 2-4, characterized in that: The housing (1) is also provided with a heat-conducting plate (8), and the housing (1) has a slot at the connecting groove (6) to allow the heat-conducting plate (8) to contact the two sets of I-beam buckles (3) for heat conduction.

6. The high-temperature early warning insulating sleeve according to claim 1, characterized in that: The limiting structure includes a fixing strap (9), which wraps around the two housings (1) and engages to fix the two housings (1).

7. The high-temperature early warning insulating sleeve according to claim 6, characterized in that: One end of the fixing strap (9) is bent to form a snap-fit ​​section (10), and the other end is provided with a snap-fit ​​groove (11). After the fixing strap (9) wraps around the two housings (1) once, it is limited by the snap-fit ​​section (10) and the snap-fit ​​groove (11).

8. The high-temperature warning insulating sleeve according to claim 6 or 7, characterized in that: The thermal structure is a thermal expansion patch (12). The thermal expansion patch (12) consists of two sets respectively disposed on the inner walls of the two housings (1). An adhesive layer is provided at the edges of the two thermal expansion patches (12) for bonding. When the wire and cable ends are heated, the thermal expansion patch (12) expands and deforms the fixing band (9) at the connection point to release the limit.

9. The high-temperature early warning insulating sleeve according to claim 8, characterized in that: The thickness of the thermal expansion patch (12) gradually increases from the hinge near the housing (1) away from the hinge.

10. The high-temperature early warning insulating sleeve according to claim 9, characterized in that: The maximum thickness of the thermal expansion patch (12) is not less than 5 mm.

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