An intelligent monitoring type cold shrink outdoor terminal head

Abstract

The present invention relates to the technical field of cold shrink outdoor terminal heads, and discloses an intelligent monitoring type cold shrink outdoor terminal head, including a cold shrink outdoor terminal arranged on a cable, the cold shrink outdoor terminal including a cold shrink three-branch sleeve and multiple sections of cold shrink tubes, the intersection areas between the branches of the cold shrink three-branch sleeve and the cold shrink tubes, and between the cold shrink tubes are intersections, in any intersection, two inner convex rings with a distance are provided on the outer surface of the inner tube, and an outer convex ring is provided on the inner surface of the outer tube near the end; a flexible composite sensing belt is provided on the area between the two inner convex rings on the inner tube, the flexible composite sensing belt is wrapped and adhered to the outer surface of the inner tube after cold shrinkage, a spiral spring is wrapped and adhered to the outer surface of the flexible composite sensing belt, the flexible composite sensing belt and the spiral spring are located in the gap between the inner tube and the outer tube, the spiral spring is used to fix the flexible composite sensing belt while providing constant elasticity for the sealing area of ​​the two sections of cold shrink tubes.

Description

Technical Field

[0001] The present invention relates to the technical field of cold shrink outdoor terminal heads, in particular to an intelligent monitoring type cold shrink outdoor terminal head. Background Art

[0002] Cold-shrink outdoor terminals are essential components in power cable lines, connecting cables to outdoor overhead lines or other electrical equipment. They primarily consist of cold-shrink insulation tubing, stress-control tubing, and seals. Installation utilizes the high elasticity of polymer materials like silicone rubber. These components are pre-expanded and fitted onto a support tube at the factory. During on-site installation, simply remove the support tube. The elastic components automatically shrink and fit tightly around the cable and connection, providing excellent insulation and sealing. Suitable for outdoor environments, these terminals effectively protect cable connections from UV rays, rain, dust, and other harsh natural conditions, ensuring stable and secure power transmission.

[0003] In the field of power transmission, outdoor terminal heads are key components for connecting power cables to overhead lines, and their performance directly affects the safe and stable operation of the power system. In the field of intelligent monitoring cold-shrink outdoor terminal heads, the existing technology has achieved certain results. For example, the technical solution demonstrated by a 35 kV cold-shrink outdoor cable terminal with publication number CN104269808A uses a method of wrapping multiple sections of cold-shrink tubing on the outside of the cable to achieve protection and connection of the cable terminal. However, this existing technology has many defects.

[0004] First, the connection method at the intersection of the two cold shrink tubes is relatively simple, lacking effective sealing and fixing structure, resulting in poor sealing. External impurities such as moisture, dust, etc. can easily invade, affecting the normal operation and service life of the cable.

[0005] Secondly, from the monitoring function perspective, existing technologies are unable to accurately obtain real-time pressure and temperature information at the connection points of the cold shrink tube. Due to the lack of effective monitoring of pressure and temperature changes in this key part, once an abnormal increase in local temperature due to poor contact or uneven pressure distribution due to improper installation occurs, it is difficult to detect and take corresponding measures in a timely manner, which may cause serious safety hazards. Summary of the Invention

[0006] (1) Technical problems solved

[0007] In response to the shortcomings of the existing technology, the present invention provides an intelligent monitoring type cold shrink outdoor terminal head, which has the advantages of providing stable pressure at the intersection of two cold shrink tubes to improve sealing, and real-time monitoring of cable temperature and cold shrink tube pressure, solving the problems of difficult installation, poor sealing and insufficient monitoring function.

[0008] (2) Technical solution

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] An intelligent monitoring type cold shrink outdoor terminal head includes a cold shrink outdoor terminal installed on a cable, the cold shrink outdoor terminal includes a cold shrink three-branch sleeve and multiple sections of cold shrink tubing. The intersection area between the branches of the cold shrink three-branch sleeve and the cold shrink tubing, and between the cold shrink tubing and the cold shrink tubing is called an intersection. The cold shrink tubing located inside and outside the intersection is respectively called an inner tube and an outer tube. In any intersection, the outer surface of the inner tube is provided with two inner convex rings with a spacing therebetween, and the inner surface of the outer tube is provided with an outer convex ring near the end.

[0011] A flexible composite sensing belt is provided in the area between the two inner convex rings on the inner tube. The flexible composite sensing belt is wrapped and adhered to the outer surface of the inner tube after cold shrinkage. A spiral spring is wrapped and adhered to the outer surface of the flexible composite sensing belt. The flexible composite sensing belt and the spiral spring are located in the gap between the inner tube and the outer tube. The spiral spring is used to fix the flexible composite sensing belt while providing a constant elastic force to the intersection.

[0012] Preferably, the spiral spring is composed of two separate coil springs, and a rubber layer is provided in the gap between the two coil springs. The rubber layer is a sealing layer formed by winding a tape. The outside of the coil spring is also wrapped with tape for fixing the coil spring. The height of the rubber layer is greater than the height of the highest point of the coil spring, and the height of the rubber layer is lower than the height of the tape wrapped around the outside of the coil spring; the flexible composite sensing strip is respectively provided with two groups of separate temperature sensing components and pressure sensing components at the positions corresponding to the two coil springs.

[0013] Preferably, an external adjustment device is provided on the outer surface of the outer tube at a position corresponding to the spiral spring, and the external adjustment device includes a fixed ring piece and a rotating outer ring that are connected to each other for relative rotation; at least one elastic pull rope is provided between the rotating outer ring and the fixed ring piece, and the elastic pull rope is wrapped around the outside of multiple fixed ring pieces, and the two ends of the elastic pull rope are respectively connected and fixed to the fixed ring piece and the rotating outer ring, and the tightness of the elastic pull rope on the fixed ring piece can be adjusted at any time by rotating the outer ring according to the data detected by the flexible composite sensor belt.

[0014] Preferably, multiple sections of fixed ring pieces are fixed on the outer circumference of the outer tube, and multiple sections of inner ring side blocks are fixed on both sides of the outer surface of each fixed ring piece. The main part of the fixed ring piece is made of soft material, which fits on the outer tube and deforms as the outer tube shrinks. The inner ring side blocks are made of hard material to provide support for the rotating outer ring; multiple sections of outer ring side blocks are fixed on both sides of the inner surface of the rotating outer ring, and each outer ring side block is clamped inside the inner ring side block and rotates.

[0015] Preferably, a slide is slidingly provided on the inner side of the rotating outer ring, one end of the elastic pull rope is fixed on the slide, and an adjustment plate is also provided on the inner side of the rotating outer ring. The adjustment plate is elastically connected to the slide through a ring guide column, and a pressure sensor is provided at the connection part between the adjustment plate and the slide.

[0016] Preferably, the rotating outer ring is provided with an adjustment groove at the installation position corresponding to the adjustment piece, and the adjustment piece can slide in the adjustment groove to adjust the position. A plurality of installation holes for fixing the adjustment piece are also provided on the side of the adjustment groove.

[0017] Preferably, two outward sliding elastic columns are provided on the side of the slide, a spring is provided inside the elastic column, a side block sliding groove is provided on the outer ring side block, and a plurality of side block fixing holes are provided on the inner ring side block.

[0018] Preferably, the sensor assembly on the flexible composite sensing belt is connected to the adjusting plate, a power supply, a processor and a wireless transmission module are provided inside the adjusting plate, a display screen is provided outside the adjusting plate, and a display screen is provided outside the adjusting plate for real-time display of the pressure value and temperature value detected by the flexible composite sensing belt and the tension value of the elastic rope detected by the pressure sensor inside the adjusting plate.

[0019] Preferably, the length of the outer ring side block is the same as the distance between the two inner ring side blocks on the upper edges of two adjacent fixed ring pieces on the outer tube after cold shrinkage, so that the outer ring side block can be installed through the gap between the inner ring side blocks when the rotating outer ring is installed.

[0020] Preferably, the flexible composite sensing strip comprises a sensing unit, a supporting unit, an electrode layer, a flexible substrate and a packaging layer; the sensing unit comprises a temperature sensing material and a pressure sensing material; and the supporting unit is an open soft strip.

[0021] (3) Beneficial effects

[0022] Compared with the prior art, the present invention provides an intelligent monitoring type cold shrink outdoor terminal head, which has the following beneficial effects:

[0023] 1. The intelligent monitoring type cold shrink outdoor terminal head is provided with two inner convex rings with a distance between them on the outer surface of the inner tube, an outer convex ring is provided near the end of the inner surface of the outer tube, and a flexible composite sensing belt is provided in the area between the two inner convex rings on the inner tube. A volute spring is wrapped around the outer surface of the flexible composite sensing belt to achieve effective monitoring and sealing reinforcement of the intersection of the cold shrink outdoor terminal. At the same time, the setting of the inner convex ring and the outer convex ring provides positioning and space for the installation of the flexible composite sensing belt and the volute spring. The volute spring plays a role in fixing the flexible composite sensing belt so that it can be stably fitted on the outer surface of the inner tube. In addition, the volute spring provides constant elasticity for the sealing area of ​​the two sections of cold shrink tubes, ensuring the stability of the sealing effect. Finally, the flexible composite sensing belt can detect the temperature and pressure conditions of the intersection in real time.

[0024] 2. This intelligent monitoring type cold shrink outdoor terminal head is based on the setting of a flexible composite sensor belt and a scroll spring. An external adjustment device is set on the outer surface of the outer tube at the position corresponding to the scroll spring, which realizes effective locking and adjustable control of the internal and external coordination. The elastic pull rope in the external adjustment device provides an adjustable locking force on the outside, forming an internal and external coordinated locking with the scroll spring on the inside, further enhancing the connection tightness between the cold shrink tubes. The multi-section fixed ring and the multi-section inner ring side stop on the fixed ring can adapt to the shrinkage process of the cold shrink tube, so that it fits on the outer wall of the cold shrink tube, ensuring the stability and effectiveness of the external adjustment device during the shrinkage process. In addition, the external adjustment device can also provide power and control for the flexible composite sensor belt. According to the data detected by the flexible composite sensor belt, the staff can adjust the tightness of the elastic pull rope on the fixed ring at any time by rotating the outer ring, thereby adjusting the sealing effect, thereby achieving the effect of improving the sealing performance and adjustability of the cold shrink outdoor terminal, so that the cold shrink outdoor terminal can better adapt to different working environments and working conditions.

[0025] 3. The intelligent monitoring type cold shrink outdoor terminal head divides the spiral spring into two sections of coil springs and sets a rubber layer between the two sections of coil springs. At the same time, the flexible composite sensing belt sets two groups of sensor components at the positions corresponding to the two coil springs, thereby further optimizing the sealing performance of the intersection of the cold shrink outdoor terminal and improving the detection diversity. The height of the rubber layer is greater than the height of the highest point of the coil spring and lower than the height of the tape wrapped around the outside of the coil spring, effectively avoiding the impact of the gap in the coil spring on the sealing performance and ensuring the sealing effect between the cold shrink tubes. The two groups of sensor components respectively detect the pressure under the two coil springs. By respectively detecting the pressure at the bottom of the two coil springs, more detailed pressure change information can be obtained, thereby providing technicians with more comprehensive and accurate data, which facilitates technicians to determine the specific location of the fault based on these data and take corresponding maintenance measures in a timely manner, thereby improving the maintenance efficiency and reliability of the cold shrink outdoor terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural diagram of the cold shrink outdoor terminal when it is installed on the cable in Example 1 of the present invention.

[0027] Figure 2 Schematic diagram of the structure of the processed cable in Example 1 of the present invention.

[0028] Figure 3 This is an exploded view of the cold shrink outdoor terminal in Example 1 of the present invention.

[0029] Figure 4 This is a schematic structural diagram of the connection between the cold shrink insulation tube and the cold shrink terminal head in the first embodiment of the present invention.

[0030] Figure 5 Schematic diagram of the structure of the intersection of two adjacent cold shrink tubes in Example 1 of the present invention.

[0031] Figure 6 This is an exploded view of the inner tube in Example 1 of the present invention.

[0032] Figure 7 This is an enlarged view of the spiral spring in Example 1 of the present invention.

[0033] Figure 8 This is a structural schematic diagram of the fixing ring piece installed on the outer tube in Example 1 of the present invention.

[0034] Figure 9 This is a schematic structural diagram of the rotating outer ring in Example 1 of the present invention.

[0035] Figure 10 This is a schematic diagram of the structure of the bullet column and the side block fixing hole in embodiment 1 of the present invention.

[0036] Figure 11 This is a layout diagram of the elastic pull rope in Example 1 of the present invention.

[0037] Figure 12 Schematic diagram of the structure of the sliding plate and the adjusting plate in the first embodiment of the present invention.

[0038] Figure 13 Schematic diagram of the structure of the flexible composite sensing strip, the spiral spring and the adhesive layer in the second embodiment of the present invention.

[0039] Figure 14 In the second embodiment of the present invention Figure 13 Exploded diagram.

[0040] In the figure: 1, cable; 11, outer sheath; 12, steel armor; 13, inner sheath; 14, filling layer; 15, copper shielding layer; 16, semi-conductive layer; 17, insulation layer; 18, core;

[0041] 2. Cold shrink outdoor terminal; 21. Cold shrink three-piece sleeve; 22. Cold shrink insulation tube; 23. Cold shrink terminal head; 24. Cold shrink sealing tube; 25. Wiring terminal; 201. Inner tube; 202. Outer tube; 203. Inner convex ring; 204. Outer convex ring;

[0042] 3. Flexible composite sensing belt;

[0043] 4. Volute spring; 41. Front spring; 42. Rear spring;

[0044] 5. External adjustment device; 51. Fixed ring; 511. Inner ring side stop; 512. Side stop fixing hole;

[0045] 52, rotating outer ring; 521, outer ring side stop; 522, side stop slide; 523, adjustment slot; 524, mounting hole; 53, slide; 531, spring post; 54, adjustment piece; 541, ring guide post; 55, elastic pull rope;

[0046] 6. Adhesive layer. DETAILED DESCRIPTION

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0048] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0049] In addition, a fixed connection refers to a connection in which parts or components are fixed without any relative movement; a transmission connection refers to a connection method in which mechanical motion or torque is transmitted to other working parts through a transmission part; a sliding connection refers to a connection method in which two objects are in contact but not fixed and can slide relative to each other; a rotating connection refers to a connection method in which two objects are in contact but not fixed and can rotate relative to each other.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features being referred to. Thus, features specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0051] Example 1:

[0052] This embodiment provides an intelligent monitoring type cold shrink outdoor terminal head with the following technical features.

[0053] See also Figure 1-12 An intelligent monitoring type cold shrink outdoor terminal head includes a cold shrink outdoor terminal 2 set on a cable 1. The cold shrink outdoor terminal 2 includes a cold shrink three-branch sleeve 21 and multiple sections of cold shrink tubing. The intersection area between the branches of the cold shrink three-branch sleeve 21 and the cold shrink tubing, and between the cold shrink tubing and the cold shrink tubing is called an intersection. The cold shrink tubing located inside and outside the intersection is respectively called an inner tube 201 and an outer tube 202. In any intersection, two inner convex rings 203 with a spacing are provided on the outer surface of the inner tube 201, and an outer convex ring 204 is provided on the inner surface of the outer tube 202 near the end.

[0054] A flexible composite sensing tape 3 is provided on the inner tube 201 in the area between the two inner convex rings 203. The flexible composite sensing tape 3 is wrapped and adhered to the outer surface of the cold-shrunk inner tube 201. A spiral spring 4 is wrapped and adhered to the outer surface of the flexible composite sensing tape 3. The flexible composite sensing tape 3 and the spiral spring 4 are located in the gap between the inner tube 201 and the outer tube 202. The spiral spring 4 is used to fix the flexible composite sensing tape 3 while providing constant elasticity for the sealing area of ​​the two sections of cold-shrink tubes.

[0055] It should be noted that the outer convex ring 204 and the outer tube 202 are an integral structure, and the material is silicone rubber. The inner convex ring 203 and the inner tube 201 are also an integral structure, and the material is also silicone rubber.

[0056] It should be noted that, in the intersection, the outer convex ring 204 is located near the opening of the intersection, and the arrangement of the components in the intersection is: the outer convex ring 204, the inner convex ring 203 on the outer side, the flexible composite sensing strip 3, the spiral spring 4 and the inner convex ring 203 on the inner side, wherein the flexible composite sensing strip 3 and the spiral spring 4 overlap.

[0057] Furthermore, an outer adjustment device 5 is provided on the outer surface of the outer tube 202 at a position corresponding to the spiral spring 4. The outer adjustment device 5 includes a fixed ring piece 51 and a rotating outer ring 52 that are relatively rotatably connected.

[0058] Multiple segments of fixed rings 51 are fixed to the outer circumference of the outer tube 202. Multiple segments of inner ring side guards 511 are fixed to both sides of the outer surface of each fixed ring 51. The main part of the fixed ring 51 is made of soft material and deforms as the outer tube 202 shrinks. The inner ring side guards 511 are made of hard material and provide support for the rotating outer ring 52.

[0059] Multiple sections of outer ring side blocks 521 are fixed on both sides of the inner surface of the rotating outer ring 52. Each outer ring side block 521 is clamped on the inner side of the inner ring side block 511 and rotates. Two symmetrical elastic pull ropes 55 are arranged between the rotating outer ring 52 and the fixed ring piece 51. The elastic pull ropes 55 are wrapped around the outside of multiple fixed ring pieces 51. The two ends of the elastic pull ropes 55 are respectively connected and fixed to the fixed ring piece 51 and the rotating outer ring 52. According to the data detected by the flexible composite sensor belt 3, the tightness of the elastic pull ropes 55 on the fixed ring piece 51 can be adjusted at any time by rotating the outer ring 52.

[0060] It should be noted that the elastic pull rope 55 is made of a high-strength rubber material with a steel wire wrapped inside, which has good elasticity and tensile strength. The elastic pull rope 55 is wrapped around the outside of multiple fixed ring pieces 51, and the two ends of the elastic pull rope 55 are respectively connected and fixed to the fixed ring piece 51 and the rotating outer ring 52 by tying a knot and fixing with glue. According to the data detected by the flexible composite sensor belt 3, the tightness of the elastic pull rope 55 on the fixed ring piece 51 can be adjusted at any time by rotating the outer ring 52.

[0061] It should be noted that the main body of the fixed ring piece 51 is made of rubber, and the inner ring side stop 511 is made of hard plastic, which is integrally formed on the fixed ring piece 51 by injection molding.

[0062] It is further provided that a slide 53 is slidingly provided on the inner side of the rotating outer ring 52, one end of the elastic pull rope 55 is fixed on the slide 53, and an adjusting piece 54 is also provided on the inner side of the rotating outer ring 52, and the adjusting piece 54 is connected to the slide 53 through a ring guide column 541, the ring guide column 541 is fixedly connected to the adjusting piece 54, and the ring guide column 541 is slidingly connected to the slide 53, a spring is provided on the outside of the ring guide column 541, and both ends of the spring are connected to the slide 53 and the adjusting piece 54, and a pressure sensor is provided at the connection part of the adjusting piece 54 with the spring.

[0063] It should be noted that the ring guide pillar 541 is an arc-shaped cylinder, and the spring is wound around or arranged on the outer surface of the ring guide pillar 541 , or the spring is arranged at the connection between the end of the ring guide pillar 541 and the slide 53 .

[0064] Furthermore, the rotating outer ring 52 is provided with an adjustment groove 523 at the installation position corresponding to the adjustment piece 54. The adjustment piece 54 can slide in the adjustment groove 523 to adjust the position. A plurality of mounting holes 524 for fixing the adjustment piece 54 are also provided on the side of the adjustment groove 523.

[0065] Two outward-sliding springs 531 are provided on the side of the slide 53, and a spring is provided inside the spring 531. A side block groove 522 is provided on the outer ring side block 521, and a plurality of side block fixing holes 512 are provided on the inner ring side block 511.

[0066] Adjusting the position of the adjusting plate 54 can adjust the elastic force on the slide 53, thereby adjusting the initial distance between the elastic column 531 on the slide 53 and the side block slide groove 522. When the rotating outer ring 52 rotates, the slide 53 is gradually pulled by the elastic pull rope 55. When the tension reaches the preset value, the elastic column 531 moves to the position of the side block slide groove 522, and the elastic column 531 passes through the side block slide groove 522. The end of the elastic column 531 slides outward and is stuck in the side block fixing hole 512, completing the fixation of the rotating outer ring 52 and realizing the adjustable tightness of the elastic pull rope 55.

[0067] It is further provided that the sensor assembly on the flexible composite sensing belt 3 is connected to the adjusting plate 54, a power supply, a processor and a wireless transmission module are provided inside the adjusting plate 54, a display screen is provided outside the adjusting plate 54, and a display screen is provided outside the adjusting plate 54 for real-time display of the pressure value and temperature value detected by the flexible composite sensing belt 3 and the tension value of the elastic pull rope 55 detected by the pressure sensor inside the adjusting plate 54.

[0068] It is further provided that the length of the outer ring side stop 521 is the same as the distance between the two inner ring side stops 511 on the upper edges of two adjacent fixed ring pieces 51 on the outer tube 202 after cold shrinkage, so that the outer ring side stop 521 can be installed through the gap between the inner ring side stops 511 when the rotating outer ring 52 is installed.

[0069] It is further provided that the flexible composite sensing strip 3 includes a sensing unit, a supporting unit, an electrode layer, a flexible substrate and a packaging layer. The sensing unit includes a temperature sensing material and a pressure sensing material. The supporting unit is an open soft strip.

[0070] It should be noted that the commonly used temperature sensing materials are bismuth telluride-based alloys, such as bismuth telluride / polyimide Bi2Te3 / PI flexible composite materials, which are fixed on the support unit by coating or bonding. They have a high room temperature Seebeck coefficient and can directly convert thermal energy into electrical energy. The generated voltage is proportional to the temperature difference and can be used for temperature sensing. In addition, there are intrinsic flexible thermoelectric materials such as carbon nanotubes, poly (3,4-ethylenedioxythiophene): polystyrene sulfonate PEDOT:PSS, and inorganic thermoelectric materials such as Bi2Te3-based, SnSe-based or PbX X=S, Se, Te based materials and flexible substrate materials such as carbon nanotube film, graphene film, cellulose paper, polyimide film, PET film composed of inorganic flexible composite thermoelectric materials; pressure sensing materials can be liquid metals, such as commercial EgaIn alloy materials, commercial Galinstan alloy materials and Ga, In, Sn alloy materials, etc., which are often encapsulated in a flexible shell with patterned flow channels such as spiral structure or interdigital structure, or materials with piezoresistive effect, such as the above-mentioned bismuth telluride based alloy, which has a piezoresistive effect when subjected to stress. The gap will change significantly, exhibiting a piezoresistive effect, thereby achieving pressure sensing. The support unit is generally made of elastic silicone, including a supporting base and multiple supporting columns. It supports and fixes the sensing unit, allowing the sensing strip to maintain a stable structure when wrapped around objects such as cylinders, while also providing support and a foundation for elastic deformation of the pressure sensing unit. The electrode layer is usually made of highly conductive materials such as copper foil and silver paste. It is used to connect the temperature and pressure sensing units and transmit the sensing signals for measurement and analysis. The flexible substrate is often made of thin film materials such as polyimide (PI) and polyethylene terephthalate (PET). It provides flexible support for the entire sensing strip, allowing the sensing strip to be bent and wrapped around objects such as cylinders. It also has good mechanical properties and chemical stability, protecting the internal sensing unit and electrode layer from external environmental influences. The encapsulation layer is generally made of materials with good flexibility and insulation, such as silicone and polyurethane. It is encapsulated by potting to protect the internal components from interference and damage from the external environment, while improving the durability and reliability of the sensing strip, making it adaptable to different usage environments.

[0071] Furthermore, the cold shrink outdoor terminal 2 includes a cold shrink three-branch sleeve 21, which is provided with three branches and a root, each branch is provided with a cold shrink tube section, each cold shrink tube section includes a cold shrink insulation tube 22, a cold shrink terminal head 23 and a cold shrink sealing tube 24, and an shed is provided on the cold shrink terminal head 23. The shed and the cold shrink terminal head 23 are an integrated structure and are manufactured together during the molding process.

[0072] The cable 1 is provided with an outer sheath 11, a steel armor 12, an inner sheath 13 and a filling layer 14 in sequence from the outside to the inside. Three phases are arranged inside the filling layer 14. Each phase is provided with a copper shielding layer 15, a semi-conductive layer 16, an insulating layer 17 and a core 18 in sequence from the outside to the inside. The end of the core 18 is connected to the terminal 25. The terminal 25 is generally made of copper and is tightly connected to the core 18 by crimping.

[0073] Furthermore, an alarm is provided on the adjusting piece 54. When the tension value of the elastic pull rope 55 or the pressure and temperature values ​​detected by the flexible composite sensor belt 3 exceed the preset safety range, the alarm sends an alarm signal to remind the staff to take action. The alarm is fixed to the adjusting piece 54 by welding and is connected to the processor in the adjusting piece 54 by a wire to realize signal transmission and control.

[0074] Example 2:

[0075] This embodiment provides an intelligent monitoring type cold shrink outdoor terminal head, which, in addition to the above technical features, also has the following technical features.

[0076] like Figure 13 and Figure 14 As shown, it is further provided that the spiral spring 4 is composed of two separate coil springs, namely a front spring 41 and a rear spring 42. A rubber layer 6 is provided in the gap between the two coil springs. The rubber layer 6 is a sealing layer formed by winding an adhesive tape. The outer side of the coil spring is also wrapped with an adhesive tape for fixing the coil spring. The height of the rubber layer 6 is greater than the height of the highest point of the coil spring, and the height of the rubber layer 6 is less than the height of the adhesive tape wrapped around the outer side of the coil spring.

[0077] The flexible composite sensing strip 3 is provided with two separate groups of temperature sensing components and pressure sensing components at positions corresponding to the two coil springs.

[0078] Working principle:

[0079] Provide the steps of pre-processing the cable 1 and installing the cold shrink outdoor terminal 2 on the cable 1:

[0080] Step 1: Stripping, peel off the outer sheath 11 according to the length of the instructions, retain 30mm steel armor 12 at the root, peel off the rest of the steel armor 12, retain 10mm inner sheath 13 at the root, peel off the rest of the inner sheath 13, peel off the filling layer 14, be careful not to scratch the copper shield 15, separate the three phases, wrap the copper shield 15 of each phase cable end with PVC tape, ground it, wipe off the dirt on the outer surface of the 50mm stripping part of the outer sheath 11, polish the oxide layer and paint on the surface of the steel armor 12 with coarse sandpaper, and use a constant force spring to Use a spring spiral spring to fix the grounding wire of the steel armor 12 on the steel armor 12, wrap the constant force spring and the steel armor 12 with PVC tape, use a triangular washer to embed the copper shielded grounding wire into the three-phase bifurcation of the cable, fix it on the copper shielding layer 15 with a constant force spring, wrap the constant force spring with PVC tape, fill the gap between the two constant force springs with filling glue and wrap the constant force spring, wrap a layer of insulating self-adhesive tape around the filling glue, overlap it with the outer sheath 11 by 10mm, and wrap a layer of sealant around the overlap between the outer sheath 11 and the insulating self-adhesive tape.

[0081] Step 2: Insert the cold shrink three-piece sleeve 21 to the root, and pull out the support strip. When pulling, first pull out the support strip at the finger end of the sleeve, then pull out the support strip at the root of the sleeve. When pulling out the support strip, pull it in a counterclockwise direction.

[0082] Step 3: Insert the cold shrink insulation tube 22 in the correct direction, overlap the cold shrink insulation tube 22 with the support sleeve finger end by 20-30mm, remove the support bar, use a ruler to check the length between the cable end and the cold shrink insulation tube 22, and cut off the excess cold shrink insulation tube 22 according to the ruler length, determine the length of the copper shielding layer 15 according to the ruler, mark and fix the copper shielding layer 15 with PVC tape, remove the PVC tape wrapped on the copper shielding layer 15 of each phase cable end, peel off the excess copper shielding layer 15, be careful not to scratch the semi-conductive layer 16, and mark the phases separately on the cold shrink insulation tube 22 with different colored PVC tapes, determine the stripping length of the semi-conductive layer 16 according to the ruler and strip it, chamfer the end of the semi-conductive layer 16 with a blade to make a smooth transition between the semi-conductive layer 16 and the insulating layer 17, cut off the insulating layer 17 according to the depth of the installation hole of the terminal plus 3mm, and polish the surface of the insulating layer 17 with fine sandpaper, be careful not to polish the semi-conductive layer 16.

[0083] Step 4: Install the cold shrink terminal head 23, use cleaning paper to clean the surface of the insulating layer 17 toward the semi-conductive layer 16, remove the PVC tape on the copper shielding layer 15, wrap the semi-conductive tape around the copper shielding layer 15 in a semi-overlap manner and overlap it with the semi-conductive layer 16 by 5mm, and overlap it with the cold shrink insulation tube 22 by 3-5mm, use a ruler to locate the installation reference line of the cold shrink terminal head 23, use PVC tape to mark it, use cleaning paper to clean the surface of the insulating layer 17 toward the semi-conductive layer 16, apply silicone grease evenly on the surface of the insulating layer 17, put the cold shrink terminal head 23 on the cable, align it with the installation reference line, remove the support bar, and remove the marking tape.

[0084] Step 5: Insert the terminal 25, press the terminal 25 according to the national standard, wrap the sealant around the crimping part of the terminal 25, fill the gap between the insulation layer 17 and the terminal 25 and the terminal indentation, and wrap a layer of insulating self-adhesive glue around the sealant.

[0085] Step 6: Put on the cold shrink sealing tube 24, remove the support bar, and cut off the excess cold shrink sealing tube 24.

[0086] Provide the installation steps of the cross section:

[0087] Step 1: Remove the support strip from the shrink tubing on the inner tube 201 and attach the cable 1 to it under the shrinkage effect. Wrap the flexible composite sensor tape 3 around the area between the two inner convex rings 203 on the inner tube 201. Wrap the spiral spring 4 around the outside of the flexible composite sensor tape 3. The spiral spring 4 secures the flexible composite sensor tape 3. Finally, secure the outside of the spiral spring 4 with PVC tape.

[0088] Step 2: First, put the rotating outer ring 52 on the outside of the inner tube 201, then install the shrink tube of the outer tube 202 on the cable 1 and remove the support bar, so that the outer convex ring 204 is located at the edge of the inner convex ring 203. At this time, the fixed ring piece 51 is deformed as the outer tube 202 shrinks. The two ends of the elastic rope 55 are fixed to the rotating outer ring 52 and the fixed ring piece 51 respectively. Finally, put the rotating outer ring 52 on the outside of the fixed ring piece 51, and install the outer ring side stop 521 through the space between the two fixed ring pieces 51;

[0089] Step 3: Rotate the outer ring 52 to adjust the tightness of the elastic drawstring 55 .

[0090] To sum up, the intelligent monitoring type cold shrink outdoor terminal head is provided with two inner convex rings 203 with a distance between them on the outer surface of the inner tube 201, an outer convex ring 204 is provided on the inner surface of the outer tube 202 near the end, and a flexible composite sensing strip 3 is provided in the area between the two inner convex rings 203 on the inner tube 201, and a spiral spring 4 is wound and fitted on the outer surface of the flexible composite sensing strip 3, thereby achieving effective monitoring and sealing reinforcement of the intersection of the cold shrink outdoor terminal 2. At the same time, the setting of the inner convex ring 203 and the outer convex ring 204 provides positioning and space for the installation of the flexible composite sensing strip 3 and the spiral spring 4. The spiral spring 4 plays a role in fixing the flexible composite sensing strip 3, so that it can be stably fitted on the outer surface of the inner tube 201, and the spiral spring 4 provides constant elasticity for the sealing area of ​​the two sections of cold shrink tubes, thereby ensuring the stability of the sealing effect. Finally, the flexible composite sensing strip 3 can detect the temperature and pressure conditions of the intersection in real time.

[0091] The intelligent monitoring type cold shrink outdoor terminal head is based on the setting of the flexible composite sensor belt 3 and the spiral spring 4. An external adjustment device 5 is set at the position of the spiral spring 4 on the outer surface of the outer tube 202, which realizes effective locking and adjustable control of the internal and external matching. The elastic pull rope 55 in the external adjustment device 5 provides an adjustable locking force on the outside, forming an internal and external matching lock with the spiral spring 4 on the inside, further enhancing the connection tightness between the cold shrink tubes. The multi-segment fixed ring piece 51 and the multi-segment inner ring side block 511 on the fixed ring piece 51 can adapt to the cold shrink tube. During the shrinking process, it fits on the outer wall of the shrink tube, ensuring the stability and effectiveness of the external adjustment device 5 during the shrinking process. In addition, the external adjustment device 5 can also provide power and control for the flexible composite sensor belt 3. According to the data detected by the flexible composite sensor belt 3, the staff can adjust the tightness of the elastic pull rope 55 on the fixed ring piece 51 at any time by rotating the outer ring 52, thereby adjusting the sealing effect, thereby achieving the effect of improving the sealing performance and adjustability of the shrink outdoor terminal 2, so that the shrink outdoor terminal 2 can better adapt to different working environments and working conditions.

[0092] The intelligent monitoring type cold shrink outdoor terminal head divides the spiral spring 4 into two sections of coil springs, and sets a rubber layer 6 between the two sections of coil springs. At the same time, the flexible composite sensing belt 3 sets two groups of sensor components at the positions corresponding to the two coil springs, thereby further optimizing the sealing performance of the intersection of the cold shrink outdoor terminal 2 and improving the detection diversity. The height of the rubber layer 6 is greater than the height of the highest point of the coil spring and lower than the height of the tape wrapped around the outside of the coil spring, effectively avoiding the influence of the gap of the coil spring on the sealing performance and ensuring the sealing effect between the cold shrink tubes. The two groups of sensor components respectively detect the pressure under the two coil springs. Since they are far away from the inner tube The coil spring at the end of 201 is mainly subjected to the outward push force of the inner tube 201, and the coil spring near the end of the inner tube 201 is subjected to less push force from the inner tube 201. When the temperature in the outer tube 202 rises and causes expansion, the pressure on the coil spring near the end of the inner tube 201 will be reduced. Therefore, by separately detecting the pressure at the bottom of the two coil springs, more detailed pressure change information can be obtained, achieving the effect of providing technicians with more comprehensive and accurate data, making it easier for technicians to determine the specific location of the fault based on these data, and take corresponding maintenance measures in a timely manner, thereby improving the maintenance efficiency and reliability of the cold shrink outdoor terminal 2.

[0093] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0094] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent monitoring type cold shrink outdoor terminal head, comprising a cold shrink outdoor terminal (2) arranged on a cable (1), characterized in that: The cold shrink outdoor terminal (2) comprises a cold shrink three-branch sleeve (21) and multiple sections of cold shrink tubes, the intersection areas between the branches of the cold shrink three-branch sleeve (21) and the cold shrink tubes, and between the cold shrink tubes are intersections, and the structures located inside and outside the intersection are respectively called inner tubes (201) and outer tubes (202); In any intersection, the outer surface of the inner tube (201) is provided with two inner convex rings (203) with a spacing therebetween, and the inner surface of the outer tube (202) is provided with an outer convex ring (204) near the end thereof; A flexible composite sensing belt (3) is provided in the area between the two inner convex rings (203) on the inner tube (201), and the flexible composite sensing belt (3) is wound and adhered to the outer surface of the inner tube (201) after shrinkage. A volute spring (4) is wound and adhered to the outer surface of the flexible composite sensing belt (3). The flexible composite sensing belt (3) and the volute spring (4) are located in the gap between the inner tube (201) and the outer tube (202), and the volute spring (4) is used to fix the flexible composite sensing belt (3) and provide a constant elastic force to the intersection.

2. The intelligent monitoring type cold shrink outdoor terminal head according to claim 1, characterized in that: The spiral spring (4) is composed of two separate coil springs, and a rubber layer (6) is provided in the gap between the two coil springs. The rubber layer (6) is a sealing layer formed by winding a tape. The outer side of the coil spring is also wound with a tape for fixing the coil spring. The height of the rubber layer (6) is greater than the height of the highest point of the coil spring, and the height of the rubber layer (6) is lower than the height of the tape wound on the outer side of the coil spring. The flexible composite sensing strip (3) is provided with two separate groups of temperature sensing components and pressure sensing components at positions corresponding to the two coil springs.

3. The intelligent monitoring type cold shrink outdoor terminal head according to claim 1, characterized in that: An external adjustment device (5) is provided on the outer surface of the outer tube (202) at a position corresponding to the spiral spring (4), and the external adjustment device (5) comprises a fixed ring piece (51) and a rotating outer ring (52) that are connected to each other in a relatively rotatable manner; At least one elastic drawstring (55) is provided between the rotating outer ring (52) and the fixed ring piece (51). The elastic drawstring (55) is wound around the outside of the plurality of fixed ring pieces (51). Two ends of the elastic drawstring (55) are respectively connected and fixed to the fixed ring piece (51) and the rotating outer ring (52). The tightness of the elastic drawstring (55) on the fixed ring piece (51) can be adjusted at any time by rotating the outer ring (52) according to data detected by the flexible composite sensing belt (3).

4. The intelligent monitoring type cold shrink outdoor terminal head according to claim 3, characterized in that: The outer circumference of the outer tube (202) is fixed with multiple sections of fixed ring pieces (51), and multiple sections of inner ring side blocks (511) are fixed on both sides of the outer surface of each fixed ring piece (51). The main part of the fixed ring piece (51) is made of soft material and is attached to the outer tube (202) and deforms as the outer tube (202) shrinks. The inner ring side blocks (511) are made of hard material and provide support for the rotating outer ring (52). Multiple sections of outer ring side blocks (521) are fixed on both sides of the inner surface of the rotating outer ring (52), and each outer ring side block (521) is clamped inside the inner ring side block (511) and rotates.

5. The intelligent monitoring type cold shrink outdoor terminal head according to claim 4, characterized in that: A slide (53) is slidably provided on the inner side of the rotating outer ring (52), one end of the elastic pull rope (55) is fixed on the slide (53), and an adjustment piece (54) is further provided on the inner side of the rotating outer ring (52). The adjustment piece (54) is elastically connected to the slide (53) through a ring guide column (541), and a pressure sensor is provided at the connection portion between the adjustment piece (54) and the slide (53).

6. The intelligent monitoring type cold shrink outdoor terminal head according to claim 5, characterized in that: The rotating outer ring (52) is provided with an adjustment groove (523) at a mounting position corresponding to the adjustment piece (54), and the adjustment piece (54) can slide in the adjustment groove (523) to adjust the position. A plurality of mounting holes (524) for fixing the adjustment piece (54) are also provided on the side of the adjustment groove (523).

7. The intelligent monitoring type cold shrink outdoor terminal head according to claim 6, characterized in that: Two outward-sliding elastic columns (531) are provided on the side of the slide (53), a spring is provided inside the elastic column (531), a side block sliding groove (522) is provided on the outer ring side block (521), and a plurality of side block fixing holes (512) are provided on the inner ring side block (511).

8. An intelligent monitoring type cold shrink outdoor terminal head according to any one of claims 1 or 2, characterized in that: The sensor assembly on the flexible composite sensing belt (3) is connected to the regulating plate (54), a power supply, a processor and a wireless transmission module are provided in the regulating plate (54), a display screen is provided on the outside of the regulating plate (54), and a display screen is provided on the outside of the regulating plate (54) for displaying in real time the pressure value and temperature value detected by the flexible composite sensing belt (3) and the tension value of the elastic drawstring (55) detected by the pressure sensor in the regulating plate (54).

9. The intelligent monitoring type cold shrink outdoor terminal head according to claim 4, characterized in that: The length of the outer ring side block (521) is the same as the distance between the two inner ring side blocks (511) on the upper edges of two adjacent fixed ring pieces (51) on the outer tube (202) after shrinkage, so that the outer ring side block (521) can pass through the gap between the inner ring side blocks (511) when the rotating outer ring (52) is installed.

10. An intelligent monitoring type cold shrink outdoor terminal head according to any one of claims 1 or 2, characterized in that: The flexible composite sensing strip (3) comprises a sensing unit, a supporting unit, an electrode layer, a flexible substrate and a packaging layer; the sensing unit comprises a temperature sensing material and a pressure sensing material; and the supporting unit is an open soft strip.

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