Intelligent monitoring type water-blocking medium-strength aluminum alloy core overhead insulated cable

Abstract

The present application relates to the technical field of power cable, in particular to a kind of intelligent monitoring type water-blocking medium-strength aluminum alloy core overhead insulated cable, including stranded conductor, stranded conductor includes wire core and multiple special-shaped aluminum filaments.Wire core and multiple special-shaped aluminum filaments are tightly pressed and stranded, and every two special-shaped aluminum filaments between the adjacent special-shaped aluminum filaments of the axial direction of wire core are provided with balance piece.Gap space is defined between balance piece and its adjacent special-shaped aluminum filaments, and water-blocking powder is filled in gap space in initial state.A kind of intelligent monitoring type water-blocking medium-strength aluminum alloy core overhead insulated cable of the present application is provided with stranded conductor and balance piece, and the stress of special-shaped aluminum filaments when thermal expansion and cold shrink can be released by balance piece, which reduces the adverse effects on cable, and makes the water-blocking powder in gap space keep stable, avoids the movement and reorganization of water-blocking powder, so as to change its water-blocking effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power cables, in particular to a smart monitoring type water-blocking middle-strength aluminum alloy core overhead insulated cable. BACKGROUND

[0002] With the increase of urban power consumption and large enterprise power consumption, the power cable line is facing an unprecedented test, and the safe operation of the cable is a problem that every enterprise values. Among the commonly used overhead insulated cables, the steel core overhead insulated cable has too large sag, and the aluminum core overhead insulated cable has small tensile strength, resulting in low overall performance-price ratio of the two cables.

[0003] Chinese patent CN209515297U discloses a high-efficiency energy-saving intrinsically safe overhead insulated cable for smart grid, which comprises a tightly compressed composite conductor composed of a center high-strength alloy copper wire and two layers of high-conductivity trapezoidal-shaped aluminum monofilament combined and tightly compressed and twisted, and a water-blocking paste is filled in the gap between the high-conductivity trapezoidal-shaped copper monofilament, which improves the tensile strength of the cable body and can realize longitudinal waterproof function. However, the thermal expansion and contraction stress of the tightly compressed composite conductor in this scheme cannot be balanced and released, which not only affects the stability of signal transmission and reduces the transmission rate, but also may cause the water-blocking material to move and recombine, thereby changing its water-blocking effect. SUMMARY

[0004] The present application provides a smart monitoring type water-blocking middle-strength aluminum alloy core overhead insulated cable to solve the problem that the existing cable cannot balance and release the thermal expansion and contraction stress, which affects the stability of the water-blocking material and the normal operation of the cable.

[0005] The application discloses an intelligent monitoring type water-blocking middle-strength aluminum alloy core overhead insulated cable which adopts the following technical scheme: an intelligent monitoring type water-blocking middle-strength aluminum alloy core overhead insulated cable, comprising a stranded conductor, the stranded conductor comprising a wire core and a plurality of profiled aluminum monofilaments; the wire core and the plurality of profiled aluminum monofilaments are tightly pressed and stranded, and every two profiled aluminum monofilaments which are arranged adjacent to each other along the axial direction of the wire core are provided with a balancing piece, and the axial direction of the wire core is referred to as a first direction; the balancing piece and the profiled aluminum monofilaments which are arranged adjacent to each other along the first direction define a gap space therebetween, and the gap space is filled with water-blocking powder in an initial state; the balancing piece comprises a main body and an elastic piece, the main body has a first cavity and two second cavities inside, the two second cavities are respectively located at two ends of the first cavity along a second direction, and the second direction is a radial direction of the wire core; the elastic piece is located in the first cavity and always has a trend of increasing the volume of the first cavity; the two second cavities are both filled with water-blocking powder and are both in communication with the gap space; the balancing piece has a first state and a second state, when in the first state, the volume of the first cavity is reduced, and the water-blocking powder in the gap space can enter the second cavity; when in the second state, the volume of the first cavity is increased, and the water-blocking powder in the second cavity can enter the gap space.

[0006] Further, the wire core is a circular aluminum alloy wire, and the profiled aluminum monofilament is a trapezoidal high-conductivity middle-strength aluminum alloy wire.

[0007] Further, the short bottom edge of the profiled aluminum monofilament is inward, and the long bottom edge is outward, one side close to the wire core along the second direction is referred to as an inner side, and the other side far away from the wire core is referred to as an outer side.

[0008] Further, the main body comprises a shell, two bending plates and two flexible sleeves, the shell is through-penetrated at two ends along the second direction, the two bending plates and the two flexible sleeves are respectively installed at the two ends of the shell along the second direction, and the flexible sleeve is located at the side of the bending plate on the same side along the second direction and away from the shell along the second direction; the two flexible sleeves are both provided with a partition plate; the partition plate is arranged along the first direction, the first cavity is defined by the shell, the two partition plates and the part of the flexible sleeve between the shell and the partition plate along the second direction; the second cavity is defined by the partition plate and the part of the flexible sleeve on the same side as the partition plate along the second direction; the partition plate and the bending plate on the same side as the partition plate along the second direction are connected through a connecting rope, and the connecting rope is in a relaxed state in a natural state; and when the two inner walls of the shell along the first direction move close to each other, the bending plate can bend along the second direction to the side away from the partition plate on the same side as the bending plate.

[0009] Further, the bending plate comprises a plurality of bending pieces, and the plurality of bending pieces are sequentially and spacedly arranged on the shell along the first direction.

[0010] Further, a through hole is formed in the part of the flexible sleeve in the second cavity, so that the second cavity is in communication with the gap space.

[0011] Further, the elastic member is a wavy plate arranged along the first direction and having elasticity, and the elastic member is always in abutment with the two inner walls of the shell along the first direction around the two ends along the first direction.

[0012] Further, the plurality of profiled aluminum filaments are divided into three layers from inside to outside, wherein the first layer includes six profiled aluminum filaments, the second layer includes twelve profiled aluminum filaments, and the third layer includes eighteen profiled aluminum filaments.

[0013] Further, a space is left between the plurality of profiled aluminum filaments, and a fiber temperature measuring unit is arranged in the space; the fiber temperature measuring unit includes a stainless steel pipe and two temperature measuring optical fibers, the two temperature measuring optical fibers are embedded in the inside of the stainless steel pipe, and the optical fiber and the stainless steel pipe are filled with ointment.

[0014] Further, the stranded conductor is coated with an insulation layer.

[0015] The beneficial effects of the present application are: the intelligent monitoring type water blocking middle strength aluminum alloy core overhead insulated cable of the present application is provided with a stranded conductor, and a balancing member is arranged between every two profiled aluminum filaments adjacent along the first direction, so that the stress of the profiled aluminum filaments when they expand and contract with heat and cold can be released by the balancing member, reducing the adverse effects on the cable, and keeping the water blocking powder in the gap space stable, avoiding the movement and recombination of the water blocking powder, so as to change the water blocking effect.

[0016] Further, the stranded conductor adopts an irregular structure for stranding, so that the stranded conductor structure is more compact and stable, the outer surface is smooth without burrs, the outer diameter of the stranded conductor is small, the amount of insulation material for the subsequent insulation layer is reduced, and the purpose of saving materials and reducing consumption can be achieved.

[0017] Further, the fiber temperature measuring unit is arranged to detect the operating temperature of the cable, the temperature of the cable is measured online, the real-time monitoring and early warning of the load state of the cable are realized, sudden failures of the cable are prevented and reduced, and the safe operation of the power cable is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0019] Figure 1 It is a schematic view of the overall structure of the embodiment of the intelligent monitoring type water blocking middle strength aluminum alloy core overhead insulated cable of the present application.

[0020] Figure 2 It is an enlarged view of A in the middle. Figure 1 It is an enlarged view of A in the middle.

[0021] Figure 3 The state diagram of the balancing piece of the embodiment of the intelligent monitoring type water-blocking medium-strength aluminum alloy core overhead insulated cable in a natural state;

[0022] Figure 4 The state diagram of the balancing piece of the embodiment of the intelligent monitoring type water-blocking medium-strength aluminum alloy core overhead insulated cable after being extruded by the special-shaped aluminum monofilament during installation;

[0023] Figure 5 The Figure 4 Enlarged view at B;

[0024] Figure 6 The truncated diagram of the cross-sectional view of the balancing piece of the embodiment of the intelligent monitoring type water-blocking medium-strength aluminum alloy core overhead insulated cable;

[0025] Figure 7 The schematic diagram of the optical fiber temperature measurement unit of the embodiment of the intelligent monitoring type water-blocking medium-strength aluminum alloy core overhead insulated cable.

[0026] In the figure: 100, stranded conductor; 110, wire core; 120, special-shaped aluminum monofilament; 125, balancing piece; 130, main body; 131, shell; 132, elastic piece; 133, bending plate; 134, flexible sleeve; 135, partition plate; 136, connecting rope; 137, through hole; 140, gap space; 151, stainless steel tube; 152, optical fiber; 153, oil paste; 200, insulation layer. DETAILED DESCRIPTION

[0027] 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. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0028] The embodiment of the intelligent monitoring type water-blocking medium-strength aluminum alloy core overhead insulated cable of the present application is as shown in Figures 1 to 7 .

[0029] An intelligent monitoring type water-blocking medium-strength aluminum alloy core overhead insulated cable comprises a stranded conductor 100, and the stranded conductor 100 is coated with an insulation layer 200. The insulation layer 200 adopts cross-linked polyethylene insulation and has good weather resistance.

[0030] The stranded conductor 100 comprises a core 110 and a plurality of profiled aluminum filaments 120, the core 110 and the plurality of profiled aluminum filaments 120 are tightly stranded, and each two profiled aluminum filaments 120 arranged adjacent to each other around the axial direction of the core 110 is provided with a balancing piece 125, and the axial direction of the core 110 is referred to as the first direction. The balancing piece 125 and the profiled aluminum filaments 120 arranged adjacent to each other in the first direction define a gap space 140 therebetween, and the gap space 140 is filled with water-blocking powder in an initial state. The initial state in the embodiment refers to the state after the balancing piece 125 and the plurality of profiled aluminum filaments 120 are installed.

[0031] The balancing piece 125 comprises a main body 130 and an elastic piece 132, the main body 130 has a first chamber and two second chambers inside, and the two second chambers are respectively located at the two ends of the first chamber in the second direction, and the second direction is the radial direction of the core 110. The elastic piece 132 is located in the first chamber and always has a tendency to increase the volume of the first chamber. The two second chambers are both filled with water-blocking powder and are in communication with the gap space 140.

[0032] The balancing piece 125 has a first state and a second state, in the first state, the volume of the first chamber is reduced, and the water-blocking powder in the gap space 140 can enter the second chamber; in the second state, the volume of the first chamber is increased, and the water-blocking powder in the second chamber can enter the gap space 140.

[0033] The embodiment sets the stranded conductor 100, and the balancing piece 125 is arranged between each two profiled aluminum filaments 120 arranged adjacent to each other around the first direction, so that the stress of the profiled aluminum filaments 120 caused by thermal expansion and cold contraction can be released by the balancing piece 125, the adverse effects on the cable are reduced, the water-blocking powder in the gap space 140 is kept stable, and the water-blocking powder is prevented from moving and recombining to change the water-blocking effect.

[0034] Specifically, when the profiled aluminum filaments 120 are heated and expanded, the profiled aluminum filaments 120 will expand and press the first chamber around the first direction, so that the volume of the first chamber is reduced, the elastic piece 132 is deformed under pressure, and at this time the water-blocking powder in the gap space 140 will enter the second chamber, and the balancing piece 125 is in the first state. By reducing the volume of the first chamber and moving the water-blocking powder in the gap space 140 into the second chamber, the profiled aluminum filaments 120 are given space, and the expansion stress between the profiled aluminum filaments 120 is released. When the profiled aluminum filaments 120 are cooled and contracted, the elastic piece 132 will reset and increase the volume of the first chamber, and at this time the water-blocking powder in the second chamber will enter the gap space 140, and the balancing piece 125 is in the second state. By increasing the volume of the first chamber and moving the water-blocking powder in the second chamber into the gap space 140, the contraction stress between the profiled aluminum filaments 120 is compensated.

[0035] In a further embodiment, the core 110 is a circular aluminum alloy wire. The profiled aluminum monofilament 120 is a trapezoidal high-conductivity medium-strength aluminum alloy wire, and the short base of the profiled aluminum monofilament 120 is inward and the long base is outward, and the side close to the core 110 in the second direction is called inward, and the side away from the core 110 is called outward.

[0036] Further, the plurality of profiled aluminum monofilaments 120 are divided into three layers from inside to outside, and the core 110 and the thirty-six profiled aluminum monofilaments 120 in the three layers are tightly stranded, wherein the first layer includes six profiled aluminum monofilaments 120, the second layer includes twelve profiled aluminum monofilaments 120, and the third layer includes eighteen profiled aluminum monofilaments 120. The insulating layer 200 is wrapped on the profiled aluminum monofilaments 120 in the third layer.

[0037] The profiled aluminum monofilament 120 adopts a high-conductivity medium-strength aluminum alloy wire with a tensile strength of not less than 255 MPa and a conductivity of ≥57.0% (preferably ≥59.0%), and the resistivity of the high-conductivity medium-strength aluminum alloy wire at 20°C is 30.247 Ω·nm. Compared with the resistivity of 32.83 Ω·nm of the ordinary high-strength aluminum alloy wire at 20°C, the same resistance can reduce the amount of aluminum conductor. In the manufacture of high-conductivity medium-strength aluminum alloy wire, iron, copper, magnesium, silicon, zinc and boron are added to the molten aluminum liquid during continuous casting and rolling, the mass ratio of various elements in the formula is optimized, and appropriate amounts of rare earth La and Ce with a content of 0.07% to 0.11% are added, and the La content:Ce content=2:1.

[0038] Alternatively, the profiled aluminum monofilament 120 adopts a medium-strength aluminum alloy wire with a conductivity of 58.5% IACS.

[0039] The stranded conductor 100 in the embodiment adopts a profiled structure, which makes the stranded conductor 100 more compact and stable, smooth and without burrs, and the outer diameter of the stranded conductor 100 is small, which reduces the amount of insulating material of the subsequent insulating layer 200, achieves the purpose of saving materials and reducing consumption, and can increase the power transmission capacity without changing the load of the tower for old lines, and can increase the span between towers and reduce costs for new lines.

[0040] In a further embodiment, the main body 130 includes a shell 131, two bending plates 133 and two flexible sleeves 134. The shell 131 is a rectangular structure, and the two ends of the shell 131 in the second direction are through, and the two bending plates 133 and the two flexible sleeves 134 are respectively installed at the two ends of the shell 131 in the second direction, and the flexible sleeve 134 is located on the side of the bending plate 133 on the same side in the second direction away from the shell 131 in the second direction, so that the shell 131 and the two flexible sleeves 134 form a closed structure.

[0041] The flexible sleeve 134 is provided with a partition plate 135. The partition plate 135 is arranged along the first direction. The first chamber is defined by the housing 131, the two partition plates 135, and the part of the flexible sleeve 134 between the housing 131 and the partition plate 135 in the second direction. The second chamber is defined by the partition plate 135 and the part of the flexible sleeve 134 on the same side of the partition plate 135 in the second direction. The partition plate 135 and the bending plate 133 on the same side of the partition plate 135 in the second direction are connected by a connecting rope 136, which is in a relaxed state in the natural state. That is, the balancing piece 125 is not installed with the special-shaped aluminum wire 120 at this time. When the housing 131 is close to each other along the two inner walls in the first direction, the bending plate 133 can bend away from the side of the partition plate 135 on the same side of the partition plate 135 in the second direction.

[0042] Specifically, the bending plate 133 is a V-shaped structure, and the bending plate 133 includes a plurality of bending pieces arranged in sequence and spaced apart along the first direction on the housing 131.

[0043] Further, a through hole 137 is formed on the part of the flexible sleeve 134 in the second chamber, so that the second chamber is in communication with the gap space 140. It needs to be particularly pointed out that the through hole 137 is not large, and only when it is pressed can the water-blocking powder be sucked in or discharged.

[0044] Specifically, the housing 131 includes two pressure plates and two side plates. The pressure plate is a rigid plate, and the two pressure plates are arranged along the first direction and arranged side by side along the first direction. The two ends of the pressure plate along the first direction are respectively referred to as the inner end and the outer end. The two side plates are arranged side by side along the first direction, and the side plate is an elastic plate. One of the side plates connects the inner ends of the two pressure plates, and the other side plate connects the outer ends of the two pressure plates. When the special-shaped aluminum wire 120 expands and presses the two pressure plates, the two side plates are synchronously pressed with the elastic piece 132; when the special-shaped aluminum wire 120 shrinks away from the two pressure plates, the two side plates will be reset with the elastic piece 132.

[0045] In a further embodiment, the elastic piece 132 is a wave-shaped plate arranged along the first direction and having elasticity. The elastic piece 132 is always in contact with the two inner walls of the housing 131 along the first direction around the two ends along the first direction.

[0046] By setting the elastic member 132 as a wavy plate and making it always abut against the two inner walls of the shell 131 around the first direction, when the profiled aluminum wire 120 expands due to heat, the profiled aluminum wire 120 will press the two inner walls of the shell 131 around the first direction, and further press the elastic member 132, the elastic member 132 deforms under pressure, and the volume of the first chamber decreases. When the profiled aluminum wire 120 shrinks due to cold, the profiled aluminum wire 120 will move away from the two inner walls of the shell 131 around the first direction, and the elastic member 132 will reset and push the two inner walls of the shell 131 around the first direction, so that the volume of the first chamber increases.

[0047] As shown in Figure 3 , the connecting rope 136 between the bent plate 133 and the partition plate 135 on the same side is in a relaxed state, and the second chamber is filled with water-blocking powder. When the balance piece 125 is installed with the profiled aluminum wire 120, the profiled aluminum wire 120 will press the shell 131 and the flexible sleeve 134, causing the shell 131 and the flexible sleeve 134 to deform, and the two bent plates 133 will bend along the second direction away from the side of the partition plate 135 on the same side, and the elastic member 132 will be pressed, the volume of the first chamber will decrease, the pressure of the gas inside the first chamber will increase, the pressure of the gas will pass between the two bent plates, and the partition plate 135 will be pressed to make the water-blocking powder enter the gap space 140 through the through hole 137, so that when the balance piece 125 is installed with the plurality of profiled aluminum wires 120, the gap space 140 is filled with water-blocking powder, as shown in Figure 2 and Figure 4 , the partition plate 135 and the bent plate 133 on the same side in the second direction will be away from each other, and the connecting rope 136 will be straightened. It needs to be specially pointed out that the flexible sleeve 134 will only deform with the extrusion of the profiled aluminum wire 120, and will not transmit pressure to the partition plate 135.

[0048] After the installation of the balancing piece 125 and the profiled aluminum monofilament 120, when the profiled aluminum monofilament 120 expands, the profiled aluminum monofilament 120 will squeeze the shell 131 around the two inner walls in the first direction, and further squeeze the elastic piece 132, the elastic piece 132 is deformed under pressure, the volume of the first cavity decreases, and at this time the two bending plates 133 will bend in the second direction away from the partition plate 135 on the same side, and pull the partition plate 135 through the connecting rope 136, so that the negative pressure is generated inside the two second cavities, and the water-blocking powder in the gap space 140 is sucked into the second cavities. When the profiled aluminum monofilament 120 shrinks, the profiled aluminum monofilament 120 will move away from the shell 131 around the two inner walls in the first direction, and the elastic piece 132 will reset to push the shell 131 around the two inner walls in the first direction, so that the volume of the first cavity increases, and at this time the two bending plates 133 will bend in the second direction towards the partition plate 135 on the same side, and push the partition plate 135 through the connecting rope 136, so that the water-blocking powder in the second cavities is discharged into the gap space 140.

[0049] It should be particularly noted that when the balancing piece 125 is installed, the change in the gas pressure generated by the gas inside the first cavity due to the thermal expansion and contraction of the profiled aluminum monofilament 120 is not enough to overcome the force exerted by the bending plate 133 on the partition plate 135 through the connecting rope 136, so after the connecting rope 136 is tightened, the partition plate 135 will be driven by the bending plate 133.

[0050] Alternatively, in another possible embodiment, a space is left between the plurality of profiled aluminum monofilaments 120, and a fiber-optic temperature measurement unit is arranged in the space. The fiber-optic temperature measurement unit includes a stainless steel tube 151 and two temperature measurement optical fibers 152, and the diameter of the stainless steel tube 151 is between 1.4 mm and 2.0 mm. The two temperature measurement optical fibers 152 are embedded inside the stainless steel tube 151, and oil paste 153 is filled between the optical fibers 152 and the stainless steel tube 151, which is used to seal and protect the optical fibers 152 inside the stainless steel tube 151.

[0051] The temperature measurement optical fibers 152 can be G.652D single-mode optical fibers, A1a (50 / 125 multi-mode optical fibers), or A1b (62.5 / 125 multi-mode optical fibers). Specifically, according to the length of different overhead lines, the transmission attenuation requirement of the temperature measurement optical fibers 152 can be met, and single-mode optical fibers are used for 10 kilometers. The attenuation value of the single-mode optical fiber G.652D at a wavelength of 1310 nm is ≤0.36 dB / km. The attenuation value of the A1a (50 / 125 type multi-mode optical fiber) at a wavelength of 1300 nm is 0.55-1.5 dB / km.

[0052] Through setting the optical fiber temperature measuring unit to detect the cable operation temperature, the cable on-line temperature is measured, real-time monitoring and early warning of the cable load state are realized, the line operation information is transmitted to the terminal detection system in real time, and the cable sudden failure is prevented and reduced, thereby ensuring the safe operation of the power cable.

[0053] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A smart monitored water-blocking medium-strength aluminum alloy core aerial insulated cable, characterized in that: The twisted conductor comprises a core and a plurality of profiled aluminum monofilaments; the core and the plurality of profiled aluminum monofilaments are tightly twisted, and a gap space is defined between each two profiled aluminum monofilaments arranged adjacently along an axis direction of the core, and the axis direction of the core is referred to as a first direction; the gap space is filled with water-blocking powder in an initial state; the balance piece comprises a main body and an elastic piece, the main body has a first chamber and two second chambers inside, the two second chambers are respectively located at two ends of the first chamber in a second direction, and the second direction is a radial direction of the core; the elastic piece is located in the first chamber and always has a trend of increasing the volume of the first chamber; the two second chambers are both filled with water-blocking powder and are in communication with the gap space; the balance piece has a first state and a second state, when in the first state, the volume of the first chamber decreases, and the water-blocking powder in the gap space can enter the second chamber; when in the second state, the volume of the first chamber increases, and the water-blocking powder in the second chamber can enter the gap space; the main body comprises a shell, two bending plates and two flexible sleeves, the shell is through at both ends in the second direction, the two bending plates and the two flexible sleeves are respectively installed at both ends of the shell in the second direction, and the flexible sleeve is located on the side of the bending plate on the same side in the second direction and away from the shell in the second direction; the two flexible sleeves are both provided with a partition plate; the partition plate is arranged along the first direction, the first chamber is defined by the shell, the two partition plates and the part of the flexible sleeve between the shell and the partition plate in the second direction; the second chamber is defined by the partition plate and the part of the flexible sleeve on the same side of the partition plate in the second direction; the partition plate and the bending plate on the same side thereof in the second direction are connected through a connecting rope, and the connecting rope is in a relaxed state in a natural state; and when the two inner walls of the shell in the first direction move close to each other, the bending plate can bend along the second direction away from the side of the partition plate on the same side thereof; the shell comprises two pressure plates and two side plates, the pressure plates are rigid plates, the two pressure plates are arranged along the first direction and are arranged side by side along the first direction, the two side plates are arranged side by side in the first direction, one of the side plates connects the inner ends of the two pressure plates, and the other side plate connects the outer ends of the two pressure plates; when the profiled aluminum monofilaments expand and press the two pressure plates, the two side plates are synchronously pressed with the elastic piece; when the profiled aluminum monofilaments shrink away from the two pressure plates, the two side plates are synchronously reset with the elastic piece; a through hole is formed in the part of the flexible sleeve in the second chamber, so that the second chamber is in communication with the gap space; the elastic piece is a wave-shaped plate arranged along the first direction and having elasticity, and the two ends of the elastic piece in the first direction always abut against the two inner walls of the shell in the first direction.

2. The intelligent monitoring type water-blocking medium-strength aluminum alloy core aerial insulated cable according to claim 1, characterized in that: The core is a circular aluminum alloy wire, and the profiled aluminum monofilament is a trapezoidal high-conductivity medium-strength aluminum alloy wire.

3. The intelligent monitored water-blocking medium-strength aluminum alloy core aerial insulated cable according to claim 2, characterized in that: The short bottom edge of the profiled aluminum monofilament is inward, and the long bottom edge is outward, the side close to the core along the second direction is referred to as the inner side, and the side away from the core is referred to as the outer side.

4. The smart monitored water-blocking medium-strength aluminum alloy core aerial insulated cable according to claim 1, characterized in that: The bending plate comprises a plurality of bending pieces which are arranged in sequence and at intervals along a first direction on the shell.

5. The smart monitored water-blocking medium-strength aluminum alloy core aerial insulated cable according to claim 1, characterized in that: The plurality of profiled aluminum filaments are divided into three layers from inside to outside, wherein the first layer comprises six profiled aluminum filaments, the second layer comprises twelve profiled aluminum filaments, and the third layer comprises eighteen profiled aluminum filaments.

6. The smart monitored water-blocking medium-strength aluminum alloy core aerial cable according to claim 1, characterized in that: A space is left between the plurality of profiled aluminum filaments, and a fiber temperature measurement unit is arranged in the space; the fiber temperature measurement unit comprises a stainless steel tube and two temperature measurement optical fibers, the two temperature measurement optical fibers are embedded in the inside of the stainless steel tube, and the optical fiber and the stainless steel tube are filled with ointment.

7. The smart monitored water-blocking medium-strength aluminum alloy core aerial insulated cable according to claim 1, characterized in that: The twisted conductor is coated with an insulating layer.

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