Environment-friendly power transmission cable for smart grid

Abstract

The present application relates to a kind of environmental protection power transmission cable for smart grid applied to cable related technical field, by setting spiral monitoring unit outside the cable body exposed in power plant, the state of cable body can be remotely monitored in real time, specifically, wrap the sensing long tube filled with inert gas outside the cable body, when being extruded or dragged, sensing long tube will be subjected to different degrees of force, and then the barometer in monitoring section can appear the change of data in real time, and then the abnormal conditions that cable body is continuously extruded by heavy object, interval extrusion, dragged or worn can be monitored in time, it is convenient for staff to handle abnormal conditions in time, so that the cable exposed in smart grid can stably carry out power transmission, it is not easy to cause cable breakage, electric leakage even fire and other security risks due to accidental extrusion, dragging and other abnormal conditions, compared with prior art, effectively ensure the stable and safe transmission of power.

Description

Technical Field

[0001] This invention relates to an environmentally friendly power transmission cable, and more particularly to an environmentally friendly power transmission cable for smart grids applied in the field of cable-related technologies. Background Technology

[0002] Power cables are cables used for transmitting and distributing electrical energy. They are commonly used in urban underground power grids, power plant lead-out lines, internal power supply in industrial and mining enterprises, and underwater transmission lines across rivers and seas. The proportion of cables in power lines is gradually increasing. Power cables are cable products used in the main lines of power systems to transmit and distribute high-power electrical energy, including power cables of various voltage levels from 1-500kV and above, and various types of insulation.

[0003] During power transmission, some cable leads are always exposed to the environment. These cables are susceptible to accidental pulling, squeezing, and friction, which can damage the cable sheath and lead to safety hazards such as localized overheating, leakage, or even fire. Current technologies typically address this by installing armored sheaths to reduce the impact of dragging and squeezing, as exemplified by the high-strength anti-drag cable disclosed in Chinese Patent No. CN210167145U. Alternatively, visual warning devices can be used to provide color-coded warnings when the cable is bent or dragged, as exemplified by the force-indicating anti-drag cable disclosed in Chinese Patent No. CN115424775A.

[0004] However, the above methods are insufficient to reduce safety hazards at the source. Often, they are only discovered after the damage has become quite severe. Only after a significant safety hazard has been created can staff carry out some emergency repairs and maintenance. There are still safety hazards such as local overheating, leakage, or even fire. For the special environment of the power grid, once leakage or fire occurs, the impact on power transmission will be significant, and the resulting economic losses and impact on personnel health will be substantial. Summary of the Invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that exposed cables in the power grid are prone to causing significant safety hazards when subjected to accidental force or dragging.

[0006] To address the aforementioned issues, this invention provides an environmentally friendly power transmission cable for smart grids, comprising a cable body, with multiple spiral monitoring units sleeved at the outer end of the cable body. Each spiral monitoring unit is connected to a power grid monitoring center via signal transmission. Adjacent spiral monitoring units are connected end-to-end. Each spiral monitoring unit includes a monitoring section and a sensing tube fixedly connected to the outer end of the monitoring section. The sensing tube is threadedly connected to the monitoring section of the adjacent spiral monitoring unit. The monitoring section includes a positioning ring sleeved on the cable body, a support base fixedly connected to the outer end of the positioning ring, a detection tube fixedly connected to the end of the support base away from the cable body, and a connecting post fixedly connected to the support base along the axial direction of the cable body. The connecting post and the sensing tube on the same spiral monitoring unit are located on opposite sides of the support base. An L-shaped air duct is drilled inside the support base, connecting the detection tube and the sensing tube. A barometer is fixedly installed at the top of the detection tube, and a replenishing air pipe is fixedly connected to the outer end of the detection tube. The replenishing air pipe is normally closed.

[0007] Compressed inert gas is introduced into the sensing tube through the gas injection pipe. The sensing tube includes a spiral tube body and a pipe joint fixedly connected to the end of the spiral tube body. The pipe joint is threadedly connected to the connecting column. A limit rod is also provided on the outside of the connecting column. The limit rod is fixedly connected to the support seat. A stop component is provided at the outer end of the pipe joint. A disconnection interlayer ring is provided inside the spiral tube body.

[0008] In the aforementioned smart grid environmentally friendly power transmission cables, by installing a spiral monitoring unit on the cable body exposed in the power plant, the status of the cable body can be remotely monitored in real time. When dragging, squeezing, or other situations occur, they can be detected immediately, enabling staff to take timely measures. Compared with existing technologies, this significantly reduces safety hazards.

[0009] As a further improvement of this application, the stop assembly includes a limiting ring fixedly connected to the outer ends of the two ends of the pipe joint and a stop section movably sleeved outside the pipe joint. The stop section is located between the two limiting rings, and a stop rod is fixedly connected to the outer end of the stop section. The length of the stop rod is greater than the distance between the pipe post and the limiting rod.

[0010] As a further improvement of this application, the stop joint and the two limiting rings are made of magnetic material, and the magnetic poles at both ends of the stop joint are opposite to the magnetic poles at the ends of the corresponding limiting rings. The end face of the limiting ring away from the spiral tube body and the corresponding end face of the stop joint are respectively provided with mutually engaging slots and insert rods.

[0011] As a further improvement of this application, the spiral tube is spiral-shaped and made of elastic material. When the spiral tube is filled with inert gas, the spiral tube is tightly attached to the cable body, and the spiral tube is wound around the cable body for no less than 3 turns.

[0012] As a further improvement of this application, the spiral tube body includes a diameter limiting layer located in the inner layer and an outer covering layer located in the outer layer, and the two are fixedly connected to each other. The disconnected interlayer ring is fixedly embedded in the outer covering layer. The outer covering layer is made of an elastic material, and the diameter limiting layer is made of a flexible sealing material.

[0013] As another improvement of this application, the disconnected interlayer ring includes multiple uniformly distributed annular sacs and multiple closed rings respectively fixedly connected between two adjacent annular sacs. The annular sacs and closed rings are interconnected. The interior of the multiple annular sacs is filled with fluorescent liquid. The multiple closed rings are all double-layered structures, and the two layers are tightly attached to each other.

[0014] As another improvement of this application, the closed ring includes two open layers and two closed layers. The ends of the two open layers and the two closed layers are fixedly connected to each other, and the two closed layers are tightly attached to each other. There is a gap between the two open layers, and the fluorescent liquid fills the open layers.

[0015] As a further improvement to this application, during installation, the open layer faces the side of the cable body axis, and the outer covering layer is a transparent structure.

[0016] In summary, by installing a spiral monitoring unit on the exposed cable body in the power plant, the status of the cable body can be remotely monitored in real time. Specifically, a sensing tube filled with inert gas is wound around the cable body. When it is squeezed or dragged, the sensing tube will be subjected to different degrees of force, which will cause the barometer inside the monitoring section to show changes in data in real time. This allows for timely detection of abnormal conditions such as continuous squeezing, intermittent squeezing, dragging, or wear of the cable body by heavy objects. This facilitates timely handling of abnormal conditions by staff, ensuring stable power transmission of exposed cables in the smart grid. It also reduces the risk of cable damage, leakage, or even fire caused by accidental squeezing, dragging, or other abnormal conditions. Compared with existing technologies, this effectively ensures stable and safe power transmission. Attached Figure Description

[0017] Figure 1 This is a perspective view of the first embodiment of this application;

[0018] Figure 2 This is a perspective view of the spiral monitoring unit according to the first embodiment of this application;

[0019] Figure 3 This is a cross-sectional schematic diagram of the monitoring section according to the first embodiment of this application;

[0020] Figure 4 This is a schematic diagram of the first embodiment of this application when the monitoring section and the sensing tube are not connected.

[0021] Figure 5This is a schematic diagram of the connection between the monitoring section and the sensing tube in the first embodiment of this application;

[0022] Figure 6 This is a schematic diagram of the first embodiment of this application when the monitoring section is connected to the sensing tube and then stopped and limited.

[0023] Figure 7 This is a partial transverse cross-sectional view of the sensing tube according to the second embodiment of this application;

[0024] Figure 8 This is a radial cross-sectional view of the sensing tube according to the third embodiment of this application;

[0025] Figure 9 This is a radial cross-sectional view of the sensing tube according to the third embodiment of this application when it is normally installed outside the cable;

[0026] Figure 10 This is a lateral comparison diagram of the sensing tube in the third embodiment of this application before and after it is installed outside the cable.

[0027] Explanation of the labels in the diagram:

[0028] 1. Cable body, 2. Monitoring section, 21. Support base, 22. Detection tube, 23. Connecting column, 201. Air supply tube, 202. Limiting rod, 203. L-shaped air guide hole, 204. Barometer, 3. Sensing long tube, 31. Spiral tube body, 32. Pipe joint, 301. Limiting ring, 302. Stop joint, 311. Outer covering layer, 312. Diameter limiting layer, 41. Annular bladder, 42. Closed ring, 421. Open layer, 422. Closed layer. Detailed Implementation

[0029] The three embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0030] First implementation method:

[0031] Figure 1 The diagram shows an environmentally friendly power transmission cable for a smart grid, comprising a cable body 1. Multiple spiral monitoring units are sleeved on the outer end of the cable body 1. The spiral monitoring units are connected to the power grid monitoring center, which is the monitoring center of the smart grid. This is existing technology and will not be described in detail here. Adjacent spiral monitoring units are connected end to end. The spiral monitoring unit includes a monitoring section 2 and a sensing tube 3 fixedly connected to the outer end of the monitoring section 2. The sensing tube 3 is threadedly connected to the monitoring section 2 of the adjacent spiral monitoring unit. The sensing tube 3 includes a spiral tube body 31 and a pipe joint 32 fixedly connected to the end of the spiral tube body 31. The pipe joint 32 is threadedly connected to the pipe post 23.

[0032] like Figure 2-3The monitoring section 2 includes a positioning ring sleeved on the outside of the cable body 1, a support base 21 fixedly connected to the outer end of the positioning ring, a detection tube 22 fixedly connected to the end of the support base 21 away from the cable body 1, and a connecting post 23 fixedly connected to the outer end of the support base 21 along the axial direction of the cable body 1. The connecting post 23 and the sensing tube 3 on the same spiral monitoring unit are respectively located on both sides of the support base 21. The ends of the sensing tubes 3 on adjacent spiral monitoring units are connected to the connecting post 23, so that multiple spiral monitoring units can be disassembled and partially replaced when damaged.

[0033] The support base 21 has an L-shaped air guide hole 203 inside, which connects to the detection tube 22 and the sensing tube 3. A barometer 204 is fixedly installed at the top of the detection tube 22, and a gas supply tube 201 is fixedly connected to the outer end of the detection tube 22. The gas supply tube 201 is normally closed. Inert gas can be injected into the sensing tube 3 through the gas supply tube 201. When the pressure data of the barometer 204 increases to a certain predetermined value, the gas supply tube 201 can be closed, so that the spiral tube 31 is kept in a full state and tightly wound on the surface of the cable body 1. When it is subjected to accidental squeezing, dragging, etc., the sensing tube 3 will deform to a certain extent, which will cause the barometer 204 to show obvious data changes. When the power grid monitoring center obtains this signal, it can obtain the status of the cable body 1, thereby realizing remote real-time monitoring of the cable body 1, which is convenient for timely dispatch of relevant personnel for maintenance.

[0034] Specifically, when dragged, the sensing tube 3 is in a dynamic state along with the cable body 1, causing the spiral tube 31 to continuously rub and collide with the ground, which in turn causes the sensing tube 3 to undergo relatively small changes. At this time, the data measured by the barometer 204 shows a slight fluctuation.

[0035] When subjected to continuous pressure from a heavy object, the reading on barometer 204 will increase sharply and remain at a high level.

[0036] When subjected to intermittent compression, the barometer 204 shows a sudden increase in reading followed by a return to a sudden increase.

[0037] When wear causes the sensing tube 3 to rupture, the reading on the barometer 204 will gradually decrease until it reaches its minimum as the gas leaks from the sensing tube 3.

[0038] It is worth noting that staff can inspect the status of sensing tube 3 every once in a while to ensure that it can maintain a stable full state and guarantee its stable monitoring of the cable.

[0039] In addition, when the data of barometer 204 increases or decreases due to changes in ambient temperature, since multiple barometers 204 will change synchronously, this phenomenon can rule out false alarms caused by ambient temperature.

[0040] like Figure 4 A limit rod 202 is also provided on the outside of the connecting column 23. The limit rod 202 is fixedly connected to the support base 21. A stop assembly is provided on the outer end of the pipe joint 32. The stop assembly includes a limit ring 301 fixedly connected to the outer ends of the two ends of the pipe joint 32 and a stop section 302 movably sleeved on the outside of the pipe joint 32. The stop section 302 is located between the two limit rings 301. A stop rod is also fixedly connected to the outer end of the stop section 302. The length of the stop rod is greater than the distance between the connecting column 23 and the limit rod 202. Figure 5 After the pipe joint 32 is threadedly tightened with the connecting pipe post 23, the stop joint 302 can be rotated so that the stop rod on it rotates to below the limit rod 202. Then, the stop joint 302 is pushed to the stop joint 302 near the support seat 21 and is attracted to it. Figure 6 At this time, the limiting rod 202 is located on the path of the pipe joint 32 being loosened from the connecting post 23. Due to the restriction of the stop rod, it is difficult for the pipe joint 32 to become loose from the connecting post 23 during use, thereby effectively ensuring the stability of the inert gas in the spiral tube 31, preventing leakage, and ensuring stable monitoring of the cable body 1.

[0041] The stop joint 302 and the two limiting rings 301 are both made of magnetic material, and the magnetic poles at both ends of the stop joint 302 are opposite to the magnetic poles at the ends of the corresponding limiting rings 301. This allows the stop joint 302 to be magnetically attracted to the corresponding limiting ring 301 regardless of which end of the pipe joint 32 it is located at, keeping it in a relatively stable state. This makes it less likely to affect the installation and removal of the sensing tube 3 on the connecting post 23. The end face of the limiting ring 301 away from the spiral tube body 31 and the corresponding end face of the stop joint 302 are respectively provided with interlocking slots and insert rods. When the stop joint 302 performs the limiting work at the connection between the sensing tube 3 and the connecting post 23, the slots and insert rods interlock, allowing the stop joint 302 to temporarily become one with the pipe joint 32. Due to the restriction of the limiting rod 202, the stop joint 302 is difficult to rotate, and thus the sensing tube 3 is difficult to rotate. This makes the stop assembly better restrict the tight connection between the sensing tube 3 and the monitoring section 2.

[0042] The spiral tube 31 is spiral-shaped and made of elastic material. When the spiral tube 31 is filled with inert gas, it is tightly attached to the cable body 1. The spiral tube 31 is wound around the cable body 1 for no less than 3 turns, which effectively ensures that the spiral tube 31 is compressed over a larger range when compressed, resulting in greater changes in the data on the barometer 204 and higher accuracy of the monitoring results.

[0043] In the aforementioned smart grid environmentally friendly power transmission cable, by installing a spiral monitoring unit on the outside of the cable body 1 exposed in the power plant, the status of the cable body 1 can be remotely monitored in real time. When dragging, squeezing or other situations occur, they can be detected immediately, enabling staff to take corresponding measures in a timely manner. Compared with existing technologies, this significantly reduces safety hazards.

[0044] Second implementation method:

[0045] This embodiment adds a disconnected interlayer ring to the first embodiment, while the rest remains the same as the first embodiment.

[0046] Figure 7 As shown, a disconnection interlayer ring is provided inside the spiral tube body 31. The spiral tube body 31 includes an inner diameter-limiting layer 312 and an outer covering layer 311, which are fixedly connected to each other. The disconnection interlayer ring is fixedly embedded in the outer covering layer 311. The outer covering layer 311 is made of elastic material, and the diameter-limiting layer 312 is made of flexible sealing material. The disconnection interlayer ring includes multiple evenly distributed annular bladders 41 and multiple closed rings 42 respectively fixedly connected between two adjacent annular bladders 41. The multiple annular sacs 41 and 42 are interconnected. Each annular sac 41 is filled with fluorescent liquid, causing it to appear as spaced-out color blocks on the surface of the sensing tube 3. The multiple closed rings 42 are double-layered structures with the two layers tightly adhered to each other. When compressed, the fluorescent liquid inside the compressed annular sac 41 spreads to both sides, gradually opening the closed rings 42 and causing the fluorescent liquids on both sides to merge, resulting in a continuous fluorescent band near the compression point. Workers passing near the cable body 1 can visually detect potential cable abnormalities based on this phenomenon, serving as a reminder to them.

[0047] Furthermore, in this real-time mode, when a local rupture occurs, the local fluorescent liquid can directly seep out, thereby achieving the effect of pinpointing the rupture point. Also, because the multiple closed rings 42 are in a closed state, the fluorescent liquid can seep out locally, which serves as a reminder without causing excessive seepage.

[0048] The third implementation method:

[0049] This embodiment further improves the closed ring 42 based on the second embodiment, while the rest remains the same as the first embodiment.

[0050] Figure 8As shown, the closed ring 42 includes two open layers 421 and two closed layers 422. The ends of the two open layers 421 and the two closed layers 422 are fixedly connected to each other, and the two closed layers 422 are tightly attached to each other. A gap is left between the two open layers 421, and the open layers 421 are filled with fluorescent liquid. During installation, the open layers 421 face the axis of the cable body 1. The outer covering layer 311 is a transparent structure, such as... Figure 9 This causes the outward-facing side to be in a spaced-out color block pattern, similar to the second embodiment. After inert gas is introduced, the open layer 421 is compressed against the surface of the cable body 1. Simultaneously, the inert gas inside the sensing tube 3 also compresses the open layer 421. These two compressive forces interact, causing the two attached closed layers 422 to gradually separate. At this point, visually, as... Figure 10 In the diagram, a represents a color block and b represents a continuous color band. Similarly, when the inert gas leaks inside the sensing tube 3, the sensing tube 3 gradually loosens, reducing the pressure between it and the cable body 1. At the same time, the pressure of the inert gas on the open layer 421 decreases synchronously, causing the closed layer 422 to gradually adhere, resulting in a color block shape. This allows staff to more intuitively observe abnormal changes and facilitate timely maintenance.

[0051] In summary, by installing a spiral monitoring unit on the outside of the exposed cable body 1 in the power plant, the status of the cable body 1 can be remotely monitored in real time. Specifically, a sensing tube 3 filled with inert gas is wound around the outside of the cable body 1. When it is squeezed or dragged, the sensing tube 3 will be subjected to different degrees of force, which will cause the barometer 204 in the monitoring section 2 to show data changes in real time. This allows for timely detection of abnormal situations such as continuous squeezing, intermittent squeezing, dragging, or wear of the cable body 1 by heavy objects. This facilitates timely handling of abnormal situations by staff, ensuring stable power transmission of exposed cables in the smart grid. It also reduces the risk of cable damage, leakage, or even fire caused by accidental squeezing, dragging, or other abnormal situations. Compared with existing technologies, this effectively ensures stable and safe power transmission.

[0052] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this invention.

Claims

1. An environmentally friendly power transmission cable for smart grid, characterized by: The utility model provides a kind of cable, including cable body (1), the cable body (1) outer end is equipped with multiple spiral monitoring units, the spiral monitoring unit is connected with power grid monitoring center signal, adjacent two spiral monitoring units are connected head to tail, the spiral monitoring unit includes monitoring node (2) and the perception long tube (3) of fixed connection in monitoring node (2) outer end, the perception long tube (3) is threadedly connected with the monitoring node (2) of adjacent spiral monitoring unit, the monitoring node (2) includes the positioning ring of being equipped in cable body (1) outside, the support seat (21) of fixed connection in the outer end of positioning ring, and the detection tube (22) of fixed connection in support seat (21) away from one end of cable body (1) and fixed connection in support seat (21) along the outer end of cable body (1) axial pipe column (23), and pipe column (23) and the perception long tube (3) on the same spiral monitoring unit are respectively located on the two sides of support seat (21), the inside of support seat (21) is excavated with L-shaped air guide hole (203), the L-shaped air guide hole (203) is communicated detection tube (22) and perception long tube (3), the inner top of detection tube (22) is fixedly installed with barometer (204), the outer end of detection tube (22) is fixedly connected with air supplementing pipe (201), and air supplementing pipe (201) is in normal closed state; By the air supplementing pipe (201), the compressed inert gas is filled into the perception long tube (3), the perception long tube (3) includes spiral pipe body (31) and pipe joint (32) of fixed connection in spiral pipe body (31) terminal, the pipe joint (32) is threadedly connected with pipe column (23), the outer side of pipe column (23) is further provided with limit rod (202), the limit rod (202) is fixedly connected with support seat (21), the outer end of pipe joint (32) is provided with stop component, the inside of spiral pipe body (31) is provided with disconnected interlayer ring.

2. The environmentally friendly power transmission cable for smart grid of claim 1, wherein: The stop component includes limit ring (301) of fixed connection in the outer end of two ends of pipe joint (32) and stop node (302) of movable sleeve in the outside of pipe joint (32), the stop node (302) is between two limit rings (301), the outer end of stop node (302) is further fixedly connected with stop rod, and the length of stop rod is greater than the distance between pipe column (23) and limit rod (202).

3. The environmentally friendly power transmission cable for smart grid of claim 2, wherein: The stop node (302) and two limit rings (301) are all made of magnetic material, and the magnetic poles of the two ends of stop node (302) are opposite to the magnetic poles of the opposite limit rings (301) end, and the end face of the limit ring (301) away from the spiral pipe body (31) and the corresponding end face of the stop node (302) are respectively provided with clamping groove and inserting rod that are clamped with each other.

4. The environmentally friendly power transmission cable for smart grid of claim 1, wherein: The spiral pipe body (31) is spiral, and the spiral pipe body (31) is made of elastic material, after the spiral pipe body (31) is filled with inert gas, the spiral pipe body (31) is closely attached to the cable body (1), and the number of turns of the spiral pipe body (31) wound outside the cable body (1) is not less than 3 turns.

5. The environmentally friendly power transmission cable for smart grid of claim 1, wherein: The spiral pipe body (31) comprises a diameter limiting layer (312) at an inner layer and an outer cladding layer (311) at an outer layer, and the two are fixedly connected with each other, the disconnected clamping layer ring is fixedly inlaid in the outer cladding layer (311), the outer cladding layer (311) is made of elastic material, and the diameter limiting layer (312) is made of flexible sealing material.

6. An environmentally friendly power transmission cable for smart grid according to claim 5, characterized in that: The disconnected clamping layer ring comprises a plurality of uniformly distributed annular capsules (41) and a plurality of closed rings (42) fixedly connected between adjacent two annular capsules (41) respectively, the annular capsules (41) and the closed rings (42) are communicated with each other, the plurality of annular capsules (41) are filled with fluorescent liquid, and the plurality of closed rings (42) are all double-layer structures, and the two layers are closely attached to each other.

7. An environmentally friendly power transmission cable for smart grid according to claim 6, characterized in that: The closed ring (42) comprises two open layers (421) and two closed layers (422), the end portions of the two open layers (421) and the two closed layers (422) are fixedly connected with each other, the two closed layers (422) are closely attached to each other, a gap is left between the two open layers (421), and the open layer (421) is filled with fluorescent liquid.

8. An environmentally friendly power transmission cable for smart grid according to claim 7, characterized in that: During installation, the open layer (421) is towards the side of the cable body (1) shaft, and the outer cladding layer (311) is of a transparent structure.

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