Moisture-proof mechanism of environment-friendly polypropylene insulated medium-voltage power cable and use method thereof

Abstract

The application relates to the technical field of power equipment, and discloses a moisture-proof mechanism of an environment-friendly polypropylene insulation medium-voltage power cable and a use method, which comprises an inner supporting piece, a plurality of electric cores arranged in the inner supporting piece, a detection signaling mechanism arranged in the inner supporting piece, a plurality of groups of the detection signaling mechanism, and a supporting mechanism arranged on the side wall of the inner supporting piece and located between the side wall of the inner supporting piece and the inside of an external protection mechanism. When the power cable is corroded and damaged and water enters, the two ends of the conductive part in the movable plate contact the connecting end of one end of the power supply and the connecting end of one end of the signal generator, so that the power supply and the signal generator are connected in communication through the conductive part, the signal generator operates, and a signal is sent, so as to remind the maintenance personnel that the power cable in the section has problems such as serious corrosion and water entering.

Description

Technical Field

[0001] This invention belongs to the field of power equipment technology, and more specifically, relates to a moisture-proof mechanism and method of use for an environmentally friendly polypropylene insulated medium-voltage power cable. Background Technology

[0002] A power cable is an electrical energy or signal transmission device, typically composed of several or groups of conductors (at least two conductors per group) twisted together like a rope. Each group of conductors is insulated from each other and often twisted around a central core. The entire cable is covered with a highly insulating outer layer. Cables are characterized by internal conductivity and external insulation. Environmentally friendly polypropylene insulated medium-voltage power cables refer to power cables made of environmentally friendly polypropylene materials. Wires and cables are supporting products for power transmission and distribution, signal transmission, or electromagnetic conversion. Due to the wide range of applications of related electrical equipment, wires and cables need to be adaptable to various complex environments. Existing environmentally friendly polypropylene insulated medium-voltage power cables have the following problems in use:

[0003] For example, a multi-functional moisture-proof power cable with application number (201710954537.5) includes a conductor, a conductor shielding tube, an insulating tape, a corrugated aluminum sheath, an asphalt outer tube, a moisture-proof outer shell, a water-blocking tape, an aluminum-plastic tape, and a sheath. The conductor is connected to the aluminum-plastic tape through the sheath with a gap fit. The corrugated aluminum sheath is connected to the aluminum-plastic tape. The water-blocking tape is installed on the outside of the corrugated aluminum sheath with a gap fit. The moisture-proof outer shell is connected to the water-blocking tape through the asphalt outer tube. In this multi-functional moisture-proof power cable, the three-proof protective layer is bonded to the moisture-proof layer. The three-proof protective layer can prevent moisture penetration, prevent moisture and mildew, and is also wear-resistant and scratch-resistant, which can better protect the cable in complex and changing environments.

[0004] However, under long-term use, corrosion will inevitably occur on the surface of power cables. Since each section of power cable is in a different environment, it is difficult to find the corrosion and poor moisture-proof areas, which makes subsequent maintenance of power cables extremely inconvenient. Summary of the Invention

[0005] The purpose of this invention is to provide a moisture-proof mechanism and method for using environmentally friendly polypropylene insulated medium-voltage power cables, which can more accurately indicate the location of corrosion on the power cable.

[0006] The technical solution adopted in this invention is as follows: A moisture-proof mechanism and method for using an environmentally friendly polypropylene insulated medium-voltage power cable, comprising an inner support member and a plurality of battery cells disposed inside the inner support member, the inner support member comprising:

[0007] An external protective mechanism is located outside the inner support member;

[0008] An internal protective mechanism is disposed inside the inner support member, and the battery cell is located inside the internal protective mechanism;

[0009] A support mechanism is disposed on the side wall of the inner support member, and the support mechanism is located between the side wall of the inner support member and the interior of the outer protective mechanism;

[0010] The detection and transmission mechanism is located inside the inner support member, and the detection and transmission mechanism is provided in several groups, with the several groups of detection and transmission mechanisms evenly distributed inside the inner support member;

[0011] The detection and transmission mechanism includes a fixed storage box, a mounting box, filler material, a connecting rod, a power supply, a signal generator, and guide columns. The inner support component has an irregularly shaped mounting groove inside. The fixed storage box is fixedly installed inside one end of the irregularly shaped mounting groove. The filler material is installed inside the fixed storage box. The inner support component has a communicating slot inside. An input port is opened on one side of the fixed storage box, and the input port matches the communicating slot. The mounting box is fixedly installed inside the irregularly shaped mounting groove at the other end. The connecting rod is slidably connected inside the mounting box. A baffle is fixedly installed at one end of the connecting rod, located on one side of the fixed storage box. A movable plate is fixedly installed at the other end of the connecting rod, and a conductive element is provided inside the movable plate. Several guide columns are fixedly installed inside the mounting box. The power supply is fixedly installed at one end of the mounting box, and the signal generator is fixedly installed at the other end of the mounting box.

[0012] Optionally, the movable plate is located inside the mounting box, and the movable plate has a matching port. Several matching ports are provided inside the movable plate, and several matching ports are matched with several guide posts. The movable plate is slidably connected to the side wall of the guide post through the matching port.

[0013] Optionally, the conductive component is fixedly installed inside one side of the movable plate, and the power supply and the signal generator are both fixedly installed with connection terminals, the two connection terminals are opposite to each other, and both connection terminals are matched with the conductive component.

[0014] Optionally, a first support spring is fixedly installed on the side wall of the connecting rod, and the first support spring is located between one side of the baffle and one side of the mounting box.

[0015] Optionally, the guide post is provided with a limiting mechanism, which includes a snap-fit ​​block and a limiting plate. The guide post has a movable cavity, and a fixed support column is fixedly connected inside the movable cavity. The limiting plate is slidably connected to the side wall of the fixed support column. The snap-fit ​​block is fixedly installed on one side of the limiting plate. A second support spring is fixedly installed between one side of the limiting plate and the inner wall of the movable cavity. The second support spring is located on one side of the fixed support column. A chamfer is provided on one side of the snap-fit ​​block, and several snap-fit ​​blocks are provided.

[0016] Optionally, fixed baffles are fixedly installed on both sides of the fixed storage box, and the fixed baffles are matched with the irregularly shaped mounting groove.

[0017] Optionally, the internal protective mechanism includes an isolation sleeve and an anti-corrosion layer. The isolation sleeve is fixedly installed on the side wall of the battery cell. The inner support has several mounting slots inside, which are located on one side of the irregular mounting slot. The anti-corrosion layer is fixedly installed on the inner wall of the mounting slot, and the battery cell is fixedly installed inside the mounting slot.

[0018] Optionally, the support mechanism includes a support fixing strip and a support sleeve. The support fixing strip is fixedly installed on the side wall of the inner support member. Several support fixing strips are provided, with a certain gap between them. The several support fixing strips are spirally distributed on the side wall of the inner support member. The support sleeve is fixedly installed inside the support fixing strip. Several air vents are opened inside the support fixing strip. The air vents are hexagonal slots and are located between the support sleeve and the side wall of the inner support member.

[0019] Optionally, the external protective mechanism includes an insulating protective layer, a composite tape wrapping layer, a fireproof wrapping tape layer, and an outer protective layer. The composite tape wrapping layer is fixedly installed on one side of the support fixing strip, the fireproof wrapping tape layer is fixedly installed on the side wall of the composite tape wrapping layer, the insulating protective layer is fixedly installed on the side wall of the fireproof wrapping tape layer, and the outer protective layer is fixedly installed on the side wall of the insulating protective layer.

[0020] A method for using a moisture-proof mechanism for an environmentally friendly polypropylene insulated medium-voltage power cable includes the following steps:

[0021] S1: During long-term use, environmentally friendly polypropylene insulated medium-voltage power cables can be evenly supported internally by setting several spirally distributed support and fixing strips on the side wall of the inner support component.

[0022] S2: When the power cable is corroded and damaged by water, the filling material inside the fixed storage box will absorb water and expand. When it expands, it will push the baffle to one side, thereby driving the movable plate to move. The movable plate will pass the snap-fit ​​block on the side wall of the guide column. By opening a chamfer on one side of the snap-fit ​​block, when the movable plate passes the snap-fit ​​block, it will push the snap-fit ​​block into the movable cavity. When the movable plate passes the snap-fit ​​block, it will pop out under the force of the second support spring, thereby preventing the filling material from shrinking back and driving the movable plate to reset.

[0023] S3: When the movable plate moves to one side of the installation box, the two ends of the conductive parts inside the movable plate will contact the connection end of the power supply and the connection end of the signal generator, so that the power supply and the signal generator are connected through the conductive parts, so that the signal generator runs and sends out a signal to remind maintenance personnel that the power cable in this section has serious corrosion and water ingress problems.

[0024] The technical effects achieved by this invention are as follows:

[0025] (1) This scheme is equipped with a detection and signaling mechanism. When the power cable is corroded and damaged by water, the filling material inside the fixed storage box will absorb water and expand. When it expands, it will push the baffle to one side. The other end of the connecting rod is fixedly installed with a movable plate. Since the baffle is fixedly installed with a movable plate at the other end of the connecting rod, the movement of the movable plate will drive the movable plate to move. When the movable plate moves to one side inside the installation box, the two ends of the conductive parts inside the movable plate will contact the connection end of the power supply and the connection end of the signal generator, so that the power supply and the signal generator are connected through the conductive parts, so that the signal generator runs and sends out a signal to remind the maintenance personnel that the power cable has serious corrosion and water ingress. In addition, the filling material can also absorb the water that enters the power cable and play a certain role in moisture prevention.

[0026] (2) A support mechanism is provided. By setting several spirally distributed support fixing strips on the side wall of the inner support member, the inside of the power cable can be evenly supported. By installing support sleeves inside the support fixing strips, the support effect of the support fixing strips can be enhanced. By opening air vents inside the support fixing strips, the air inside the power cable can be circulated. Furthermore, by setting the air vents as hexagonal slots, the support fixing strips can have a certain degree of flexibility while playing a supporting role.

[0027] (3) By setting a limiting mechanism, when the movable plate moves to the side of the mounting box under the push of the baffle, the movable plate will pass the snap-fit ​​block on the side wall of the guide column. By opening a chamfer on one side of the snap-fit ​​block, when the movable plate passes the snap-fit ​​block, the snap-fit ​​block will be pushed into the movable cavity. When the movable plate passes the snap-fit ​​block, it will pop out under the action of the second support spring, thereby preventing the filling material from shrinking back and causing the movable plate to reset, so that the conductive parts inside the movable plate can always play a connecting role.

[0028] (4) An external protection mechanism is set up. By setting up an insulating protective layer, a composite tape wrapping layer, a fireproof wrapping tape layer and an outer protective layer, it can effectively suppress the leakage of internal signals or noise to the outside and suppress interference from external signals. It can play a good fireproof role and can play a good protective role on the outer surface of the power cable. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of the present invention;

[0031] Figure 2 This is a partial structural cross-sectional view of the present invention;

[0032] Figure 3 This is a schematic diagram of the support mechanism structure of the present invention;

[0033] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0034] Figure 5 This is a schematic diagram of the structure of the transmitting mechanism of the present invention;

[0035] Figure 6 This is a schematic diagram of the internal structure of the transmitting mechanism of the present invention;

[0036] Figure 7 This is a schematic diagram of the connecting rod structure of the present invention;

[0037] Figure 8 This is a schematic diagram of the guide post structure of the present invention;

[0038] Figure 9 This is a partial cross-sectional view of the guide post of the present invention.

[0039] The attached diagram lists the components represented by each number as follows:

[0040] 1. Inner support component; 2. Outer protective layer; 201. Insulating protective layer; 202. Composite tape wrapping layer; 203. Fireproof wrapping tape layer; 3. Support fixing strip; 301. Support sleeve; 302. Air vent; 4. Irregular mounting groove; 401. Connecting groove; 411. Input port; 402. Fixing baffle; 403. Fixing storage box; 413. Filler; 404. Mounting box; 414. Power supply; 424. Signal 434. Generator; 405. Connecting end; 406. Baffle; 416. Connecting rod; 407. First support spring; 408. Movable plate; 419. Conductive component; 400. Matching port; 401. Guide post; 412. Snap-fit ​​block; 429. Movable cavity; 439. Limiting plate; 449. Second support spring; 459. Fixed support post; 500. Mounting groove; 501. Battery cell; 502. Isolation sleeve; 503. Anti-corrosion layer. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Please see Figures 1-9 This invention provides a moisture-proof mechanism and method for using an environmentally friendly polypropylene insulated medium-voltage power cable. It comprises an inner support member 1 and a plurality of battery cells 501 disposed inside the inner support member 1. The inner support member 1 includes: an external protective mechanism disposed outside the inner support member 1; an internal protective mechanism disposed inside the inner support member 1, with the battery cells 501 located inside the internal protective mechanism; a support mechanism disposed on the side wall of the inner support member 1, located between the side wall of the inner support member 1 and the interior of the external protective mechanism; and a detection and transmission mechanism disposed inside the inner support member 1, comprising a plurality of groups of detection and transmission mechanisms evenly distributed inside the inner support member 1.

[0043] The detection and transmission mechanism includes a fixed storage box 403, a mounting box 404, a filler 413, a connecting rod 406, a power supply 414, a signal generator 424, and a guide post 409. The inner support member 1 has a shaped mounting groove 4 inside, which is used to install the detection and transmission mechanism. The fixed storage box 403 is fixedly installed inside one end of the shaped mounting groove 4. The filler 413 is installed inside the fixed storage box 403. The filler 413 is a hydrophilic polyurethane prepolymer. Due to the water-swelling property of the hydrophilic polyurethane prepolymer, when water enters the power cable, the filler 413 can absorb the moisture and expand simultaneously.

[0044] The inner support member 1 has a connecting slot 401 inside. The fixed storage box 403 has an input port 411 on one side, which matches the connecting slot 401. The mounting box 404 is fixedly installed inside the irregular mounting groove 4 at the other end. The connecting rod 406 is slidably connected inside the mounting box 404. A baffle 405 is fixedly installed at one end of the connecting rod 406, located on one side of the fixed storage box 403. By setting the baffle 405 on one side of the fixed storage box 403, when the power cable is subjected to external... When corrosion damage occurs and water enters, the filling material 413 inside the fixed storage box 403 will absorb water and expand. This expansion will push the baffle 405 to one side. A movable plate 407 is fixedly installed at the other end of the connecting rod 406. Because the movable plate 407 is fixedly installed at the other end of the connecting rod 406, the movement of the baffle 405 will cause the movable plate 407 to move. A conductive element 417 is installed inside the movable plate 407. Several guide posts 409 are fixedly installed inside the mounting box 404. A power supply 41... 4. The power supply 414 and the signal generator 424 are fixedly installed at one end inside the mounting box 404, and the power supply 414 and the signal generator 424 are both fixedly installed with connection terminals 434 on one side. The two connection terminals 434 correspond to each other and are matched with the conductive parts 417. When the movable plate 407 moves to one side inside the mounting box 404, the two ends of the conductive parts 417 inside the movable plate 407 will contact the connection terminals 434 at one end of the power supply 414 and the connection terminals 434 at one end of the signal generator 424, so that the power supply 414 and the signal generator 424 are connected through the conductive parts 417, so that the signal generator 424 runs and sends out a signal to remind maintenance personnel that the power cable section has serious corrosion and water ingress problems. Fixed baffles 402 are fixedly installed on both sides of the fixed storage box 403. The fixed baffles 402 match the irregular mounting groove 4. By setting the fixed baffles 402, several detection and signal transmitting mechanisms can be separated from each other, so that the detection results are more accurate.

[0045] In some embodiments, see Figure 5 , Figure 6 The movable plate 407 is located inside the mounting box 404. The movable plate 407 has several matching ports 408. These ports 408 are matched with several guide posts 409. By setting the guide posts 409, the movement direction of the movable plate 407 can be restricted. The movable plate 407 is slidably connected to the side wall of the guide posts 409 through the matching ports 408. The conductive component 417 is fixedly installed inside one side of the movable plate 407. The connecting rod 406 has a first support spring 416 fixedly installed on its side wall. The first support spring 416 is located between one side of the baffle 405 and one side of the mounting box 404. By setting the first support spring 416, the baffle 405 can be supported to prevent the baffle 405 from moving due to the swaying of the power cable.

[0046] In some embodiments, see Figure 8 , Figure 9 The guide post 409 is equipped with a limiting mechanism, which includes a locking block 419 and a limiting plate 439. A movable cavity 429 is formed inside the guide post 409, and a fixed support post 459 is fixedly connected inside the movable cavity 429. The limiting plate 439 is slidably connected to the side wall of the fixed support post 459. The locking block 419 is fixedly installed on one side of the limiting plate 439. A second support spring 449 is fixedly installed between one side of the limiting plate 439 and the inner wall of the movable cavity 429. The second support spring 449 supports the locking block 419. The second support spring 449 is located on one side of the fixed support post 459, and the fixed support post 459 guides the movement of the locking block 419. A chamfer is formed on one side of the locking block 419. When a chamfer is made on one side of the snap-fit ​​block 419, the movable plate 407 can pass through the snap-fit ​​block 419 more smoothly. There are several snap-fit ​​blocks 419. By setting a limiting mechanism, when the movable plate 407 moves to the side of the mounting box 404 under the push of the baffle 405, the movable plate 407 will pass through the snap-fit ​​block 419 on the side wall of the guide post 409. By making a chamfer on one side of the snap-fit ​​block 419, when the movable plate 407 passes through the snap-fit ​​block 419, the snap-fit ​​block 419 will be pushed into the movable cavity 429. When the movable plate 407 passes through the snap-fit ​​block 419, it will pop out under the force of the second support spring 449, thereby preventing the filler 413 from retracting and causing the movable plate 407 to reset, so that the conductive part 417 inside the movable plate 407 can always play a connecting role.

[0047] In some embodiments, see Figure 1 , Figure 2 The internal protective mechanism includes an insulating sleeve 502 and an anti-corrosion layer 503. The insulating sleeve 502 is fixedly installed on the side wall of the battery cell 501. The inner support 1 has several mounting slots 5 inside, which are located on one side of the irregular mounting slot 4. The anti-corrosion layer 503 is fixedly installed on the inner wall of the mounting slot 5. The battery cell 501 is fixedly installed inside the mounting slot 5. The insulating sleeve 502 is made of montmorillonite nanocomposite film, which has a good insulation effect and prevents the battery cells 501 from contacting each other and affecting each other. The anti-corrosion layer 503 is made of high-temperature glass fiber wire, which can effectively protect the internal battery cells 501.

[0048] The external protective structure includes an insulating protective layer 201, a composite tape wrapping layer 202, a fireproof wrapping tape layer 203, and an outer protective layer 2. The composite tape wrapping layer 202 is fixedly installed on one side of the support fixing strip 3, the fireproof wrapping tape layer 203 is fixedly installed on the side wall of the composite tape wrapping layer 202, the insulating protective layer 201 is fixedly installed on the side wall of the fireproof wrapping tape layer 203, and the outer protective layer 2 is fixedly installed on the side wall of the insulating protective layer 201. The insulating protective layer 201 is made of nano-insulating material, which uniformly disperses powder with a nanoscale range between 1 and 100 nm. The polymer resin provides good insulation to ensure the safe use of the power cable. The composite tape wrapping layer 202 is made of copper-plastic composite tape, which can effectively suppress the leakage of internal signals or noise to the outside and suppress interference from external signals. The fireproof wrapping tape layer 203 is made of ceramic silicone composite tape, which can provide good fire protection. The outer protective layer 2 is made of polypropylene, which is non-toxic, odorless, low in density, and has good strength, rigidity, hardness and heat resistance, and can provide good protection for the outer surface of the power cable.

[0049] In some embodiments, see Figure 1 , Figure 3 , Figure 4 The support mechanism includes a support fixing strip 3 and a support sleeve 301. The support fixing strip 3 is fixedly installed on the side wall of the inner support member 1. Several support fixing strips 3 are provided, with a certain gap between them. The support fixing strips 3 are spirally distributed on the side wall of the inner support member 1. The support sleeve 301 is fixedly installed inside the support fixing strip 3. Several air circulation ports 302 are opened inside the support fixing strip 3. The air circulation ports 302 are hexagonal slots and are located between the support sleeve 301 and the side wall of the inner support member 1. By setting several spirally distributed support fixing strips 3 on the side wall of the inner support member 1, the inside of the power cable can be evenly supported. By installing the support sleeve 301 inside the support fixing strip 3, the support effect of the support fixing strip 3 can be enhanced. By opening the air circulation ports 302 inside the support fixing strip 3, the air inside the power cable can be circulated. Furthermore, by making the air circulation ports 302 hexagonal slots, the support fixing strip 3 can have a certain degree of flexibility while providing support.

[0050] The power supply 414 and signal generator 424 involved in this embodiment can be freely configured according to the actual application scenario. The signal generator 424 is powered on and operates using methods commonly used in the prior art.

[0051] The working process and principle of this invention: During long-term use, the environmentally friendly polypropylene insulated medium-voltage power cable can be evenly supported internally by several spirally distributed support and fixing strips 3 arranged on the side wall of the inner support member 1. The support effect of the support and fixing strips 3 can be enhanced by installing support sleeves 301 inside the support and fixing strips 3. Air vents 302 are opened inside the support and fixing strips 3 to allow air circulation inside the power cable. Furthermore, by designing the air vents 302 as hexagonal slots, the support and fixing strips 3 can provide additional support. While functioning properly, it also possesses a degree of flexibility. When the power cable is corroded or damaged by water, the filling material 413 inside the fixed storage box 403 will absorb water and expand. This expansion will push the baffle 405 to one side. A movable plate 407 is fixedly installed at the other end of the connecting rod 406. Because the movable plate 407 is fixedly installed at the other end of the connecting rod 406, the movement of the baffle 405 will cause the movable plate 407 to move. When the movable plate 407 moves to one side inside the mounting box 404, the two ends of the conductive element 417 inside the movable plate 407 will connect with the connection end 43 of one end of the power supply 414. 4. The connection terminal 434 of the signal generator 424 is in contact with the power supply 414, which is connected to the signal generator 424 through the conductive part 417, so that the signal generator 424 can run and send a signal to remind maintenance personnel that the power cable section has serious corrosion and water ingress problems. When the movable plate 407 moves to the side of the mounting box 404 under the push of the baffle 405, the movable plate 407 will pass through the snap-fit ​​block 419 on the side wall of the guide post 409. By opening a chamfer on one side of the snap-fit ​​block 419, when the movable plate 407 passes through the snap-fit ​​block 419, The snap-fit ​​block 419 will be pushed into the movable cavity 429. When the movable plate 407 passes the snap-fit ​​block 419, it will pop out under the force of the second support spring 449, thereby preventing the filler 413 from retracting and causing the movable plate 407 to reset, so that the conductive component 417 inside the movable plate 407 can always play a connecting role. Fixed baffles 402 are fixedly installed on both sides of the fixed storage box 403. The fixed baffles 402 match the irregular mounting groove 4. By setting the fixed baffles 402, several detection and signaling mechanisms can be separated from each other, thereby making the detection results more accurate.

[0052] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A moisture-proof mechanism for an environmentally friendly polypropylene insulated medium-voltage power cable, applied to power equipment, the power cable having an inner support member (1) and a plurality of battery cores (501) disposed inside the inner support member (1), characterized in that, The internal support member (1) includes: An external protective mechanism is disposed outside the inner support member (1); An internal protective mechanism is disposed inside the inner support member (1), and the battery cell (501) is located inside the internal protective mechanism; A support mechanism is provided on the side wall of the inner support member (1), and the support mechanism is located between the side wall of the inner support member (1) and the interior of the outer protective mechanism; The detection and transmission mechanism is located inside the inner support member (1), and the detection and transmission mechanism is provided in several groups, with the several groups of detection and transmission mechanisms evenly distributed inside the inner support member (1). The detection and transmission mechanism includes a fixed storage box (403), a mounting box (404), a filler (413), a connecting rod (406), a power supply (414), a signal generator (424), and a guide column (409). The inner support member (1) has a shaped mounting groove (4) inside. The fixed storage box (403) is fixedly installed inside one end of the shaped mounting groove (4). The filler (413) is installed inside the fixed storage box (403). The inner support member (1) has a connecting slot (401) inside. The fixed storage box (403) has an input port (411) on one side, which matches the connecting slot (401). The mounting box (404) is fixedly installed on the... The connecting rod (406) is slidably connected to the inside of the mounting box (404) at the other end of the irregular mounting groove (4). A baffle (405) is fixedly installed at one end of the connecting rod (406), and the baffle (405) is located on one side of the fixed storage box (403). A movable plate (407) is fixedly installed at the other end of the connecting rod (406). A conductive component (417) is provided inside the movable plate (407). A guide post (409) is fixedly installed inside the mounting box (404). Several guide posts (409) are provided. A power supply (414) is fixedly installed at one end of the mounting box (404). A signal generator (424) is fixedly installed at the other end of the mounting box (404).

2. The moisture-proof mechanism of the environmentally-friendly polypropylene insulated medium-voltage power cable according to claim 1, characterized in that: The movable plate (407) is located inside the mounting box (404). The movable plate (407) has a matching port (408) inside. There are several matching ports (408), and several matching ports (408) are matched with several guide posts (409). The movable plate (407) is slidably connected to the side wall of the guide post (409) through the matching port (408).

3. The moisture-proof mechanism of the environmentally friendly polypropylene insulated medium-voltage power cable according to claim 1, characterized in that: The conductive component (417) is fixedly installed inside one side of the movable plate (407). The power supply (414) and the signal generator (424) are both fixedly installed with connection terminals (434). The two connection terminals (434) correspond to each other and are matched with the conductive component (417).

4. The moisture-proof mechanism of the environmentally friendly polypropylene insulated medium-voltage power cable according to claim 1, characterized in that: A first support spring (416) is fixedly installed on the side wall of the connecting rod (406), and the first support spring (416) is located between one side of the baffle (405) and one side of the mounting box (404).

5. The moisture-proof mechanism of the environmentally friendly polypropylene insulated medium-voltage power cable according to claim 1, characterized in that: The guide post (409) is provided with a limiting mechanism, which includes a snap-fit ​​block (419) and a limiting plate (439). The guide post (409) has a movable cavity (429) inside. A fixed support post (459) is fixedly connected inside the movable cavity (429). The limiting plate (439) is slidably connected to the side wall of the fixed support post (459). The snap-fit ​​block (419) is fixedly installed on one side of the limiting plate (439). A second support spring (449) is fixedly installed between one side of the limiting plate (439) and the inner wall of the movable cavity (429). The second support spring (449) is located on one side of the fixed support post (459). A chamfer is provided on one side of the snap-fit ​​block (419), and several snap-fit ​​blocks (419) are provided.

6. The moisture-proof mechanism of the environmentally friendly polypropylene insulated medium-voltage power cable according to claim 1, characterized in that: The fixed storage box (403) is fixedly installed with fixed baffles (402) on both sides, and the fixed baffles (402) are matched with the irregular mounting groove (4).

7. The moisture-proof mechanism of the environmentally friendly polypropylene insulated medium-voltage power cable according to claim 1, characterized in that: The internal protective mechanism includes an isolation sleeve (502) and an anti-corrosion layer (503). The isolation sleeve (502) is fixedly installed on the side wall of the battery cell (501). The inner support member (1) has several mounting slots (5) inside. The mounting slots (5) are located on one side of the irregular mounting slot (4). The anti-corrosion layer (503) is fixedly installed on the inner wall of the mounting slot (5). The battery cell (501) is fixedly installed inside the mounting slot (5).

8. The moisture-proof mechanism of the environmentally friendly polypropylene insulated medium-voltage power cable according to claim 1, characterized in that: The support mechanism includes a support fixing strip (3) and a support sleeve (301). The support fixing strip (3) is fixedly installed on the side wall of the inner support member (1). There are several support fixing strips (3), and there is a certain gap between the several support fixing strips (3). The several support fixing strips (3) are spirally distributed on the side wall of the inner support member (1). The support sleeve (301) is fixedly installed inside the support fixing strip (3). Several air vents (302) are opened inside the support fixing strip (3). The air vents (302) are hexagonal slots and are located between the support sleeve (301) and the side wall of the inner support member (1).

9. The moisture-proof mechanism for an environmentally friendly polypropylene insulated medium-voltage power cable according to claim 8, characterized in that: The external protective mechanism includes an insulating protective layer (201), a composite tape wrapping layer (202), a fireproof wrapping tape layer (203), and an outer protective layer (2). The composite tape wrapping layer (202) is fixedly installed on one side of the support fixing strip (3). The fireproof wrapping tape layer (203) is fixedly installed on the side wall of the composite tape wrapping layer (202). The insulating protective layer (201) is fixedly installed on the side wall of the fireproof wrapping tape layer (203). The outer protective layer (2) is fixedly installed on the side wall of the insulating protective layer (201).

10. A method of using a moisture barrier according to any one of claims 1-9 for an environmentally friendly polypropylene insulated medium voltage power cable, characterized in that: Specifically, the following steps are included: S1: During long-term use, the environmentally friendly polypropylene insulated medium-voltage power cable can be evenly supported by a number of spirally distributed support fixing strips (3) set on the side wall of the inner support member (1). S2: When the power cable is corroded and damaged by water, the filling material (413) inside the fixed storage box (403) will absorb water and expand. When it expands, it will push the baffle (405) to one side, thereby driving the movable plate (407) to move. The movable plate (407) will pass the snap-fit ​​block (419) on the side wall of the guide column (409). By opening a chamfer on one side of the snap-fit ​​block (419), when the movable plate (407) passes the snap-fit ​​block (419), it will push the snap-fit ​​block (419) into the movable cavity (429). When the movable plate (407) passes the snap-fit ​​block (419), it will pop out under the force of the second support spring (449), thereby preventing the filling material (413) from retracting and driving the movable plate (407) to reset. S3: When the movable plate (407) moves to one side inside the mounting box (404), the two ends of the conductive part (417) inside the movable plate (407) will contact the connection end (434) of one end of the power supply (414) and the connection end (434) of one end of the signal generator (424), so that the power supply (414) and the signal generator (424) are connected through the conductive part (417), so that the signal generator (424) runs and sends out a signal to remind the maintenance personnel that the power cable in this section has serious corrosion and water ingress problems.

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