A multi-functional medium voltage cable for power transmission

Abstract

The application discloses a multifunctional medium-voltage cable for power transmission and relates to the technical field of cables. A plurality of power connection treatment strips are embedded and installed at equal intervals on the outer side of an inner insulation sleeve of a transmission line core. A center insulation sleeve is sleeved on the outer side of the inner insulation sleeve and the power connection treatment strips. A plurality of inner protection shielding strips are wound at equal intervals on the outer side of the center insulation sleeve. A plurality of hard buffer strips are laid on the outer side of the inner protection shielding strips. The application uses external staggered heat insulation strips to reduce the influence of the external environment on the cable interior, ensure stable heat dissipation of the cable interior, avoid the situation that the internal temperature changes too much or overheats due to the fact that the heat conduction component cannot adjust itself when the cable is running, reduce the situation that the insulation component of the cable is continuously subjected to thermal expansion and cold contraction or excessive heating, which accelerates aging of the insulation component, improve the stability of the cable operation, and prolong the service life of the cable.

Description

Technical Field

[0001] This invention relates to the field of cable technology, specifically to a multifunctional medium-voltage cable for power transmission. Background Technology

[0002] Medium-voltage cables are key components in power transmission and are widely used in urban power grids, industrial power supply, and renewable energy projects. They typically refer to power cables with rated voltages between 1kV and 35kV. Common voltage levels are 6kV, 10kV, and 35kV in China, and 3.3kV, 6.6kV, 11kV, and 33kV internationally. Multifunctional medium-voltage cables are composite cables that integrate multiple additional functions on the basis of traditional medium-voltage cables. They are designed to meet the comprehensive needs of power transmission, data communication, environmental monitoring, and safety protection, and are suitable for complex scenarios such as smart grids, Industry 4.0, and smart cities.

[0003] However, when existing medium-voltage cables are used in low-temperature environments, the lack of adjustable heat-conducting components inside the cables leads to excessively high internal temperatures when direct heat insulation is applied. Without insulation, the internal temperature of the cable fluctuates continuously, affecting its operational stability. Furthermore, the cable insulation sheath ages faster under continuous hot and cold conditions, thus impacting the cable's service life. Summary of the Invention

[0004] This invention provides a multifunctional medium-voltage cable for power transmission, which can effectively solve the problems mentioned in the background art. When existing medium-voltage cables are used in low-temperature environments, the lack of adjustable heat-conducting components inside the cable leads to excessively high internal temperatures during direct heat insulation treatment. Without insulation, the internal temperature of the cable fluctuates continuously, affecting its operational stability. Furthermore, the insulation sheath of the cable ages rapidly under continuous hot and cold conditions, affecting the cable's service life.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a multifunctional medium-voltage cable for power transmission, comprising a transmission core, wherein an inner and outer sheath assembly is provided on the side end of the transmission core;

[0006] The inner outer protective assembly includes an inner insulating sleeve;

[0007] The outer end of the transmission line core is fitted with an inner insulating sleeve, and several electrical connection strips are equidistantly embedded in the outer end of the inner insulating sleeve. The outer ends of the inner insulating sleeve and the electrical connection strips are fitted with a central insulating sleeve.

[0008] The outer side of the central insulating sleeve is wound with several inner protective shielding strips at equal intervals. The outer ends of the inner protective shielding strips are covered with rigid buffer strips. Several heat exchange relay cavities are opened at equal intervals on the inner side of the rigid buffer strips.

[0009] The outer side end of the hard buffer strip is embedded with a plurality of elastic contact sheets, and the outer side end of the plurality of elastic contact sheets is paved with a middle positioning strip.

[0010] The inner side bottom of the heat exchange relay cavity is sleeved with a suction sponge pad, the outer side end of the middle positioning strip is bonded with a hollow partition elastic sleeve, and the inner side of the hollow partition elastic sleeve is embedded with a plurality of porous heat absorption pads.

[0011] According to the above technical scheme, the transmission line core has three roots, the inner diameter of the center insulation sleeve is equal to the outer diameter of the inner insulation sleeve, and the side ends of two adjacent hard buffer strips are mutually attached.

[0012] According to the above technical scheme, the outer side end of the hollow partition elastic sleeve is symmetrically bonded with a contact heat insulation strip, and the outer side end of the plurality of hollow partition elastic sleeves and contact heat insulation strips is paved with a heat conduction matching sleeve.

[0013] The side ends of the two heat conduction matching sleeves are bonded with a special-shaped insulation filling strip, one end of the special-shaped insulation filling strip is embedded with a plurality of embedding limiting holes, and a reinforcing positioning rib is inserted and mounted in the inner side of the embedding limiting hole.

[0014] A plurality of isolation insulation sleeves are bonded between the special-shaped insulation filling strips, the inner side end of the isolation insulation sleeve is paved with a staggered heat insulation strip, and a soft pad reset sleeve is arranged at the inner side of the isolation insulation sleeve.

[0015] The inner side of the soft pad reset sleeve is sleeved with a transmission optical fiber, a plurality of independent reset cavities are formed in the inner side of the special-shaped insulation filling strip, a buffer porous shrink block is bonded in the inner side of the independent reset cavity, and a plurality of hard alignment sheets are bonded at the side end of the buffer porous shrink block.

[0016] According to the above technical scheme, a plurality of outer limit shielding strips are bonded at the outer side end of the plurality of special-shaped insulation filling strips, a plurality of staggered heat insulation strips are paved at the outer side end of the plurality of outer limit shielding strips, an outer limit insulation sleeve is paved at the outer side end of the plurality of staggered heat insulation strips, and a plurality of anti-stabbing elastic sheets are embedded and mounted at the inner side of the outer limit insulation sleeve.

[0017] The inner side bottom of the elastic contact sheet is inserted and mounted in the inner side of the heat exchange relay cavity, the side end of the contact heat insulation strip is slidably attached to the outer side end of the hard buffer strip and the elastic contact sheet, and the longitudinal section of the contact heat insulation strip is in the shape of a.

[0018] According to the above technical scheme, the staggered heat insulation strip and the soft pad reset sleeve each have two layers, the outer side end of the hard alignment sheet is bonded and connected to one end of the inner side of the independent reset cavity, and the staggered heat insulation strip and the anti-stabbing elastic sheet each have two layers.

[0019] According to the technical scheme, the reinforcing positioning ribs are nine, the special-shaped insulation filling strips are three, the longitudinal sections of the electricity connection processing strips, the inner protection shielding strips, the hard buffering strips, the elastic contact sheets, the middle limiting strips, the sponge pads, the hollow partition elastic sleeves, the porous heat absorbing pads, the staggered heat insulation strips, the hard alignment sheets, the outer limiting shielding strips, the staggered heat insulation strips and the anti-piercing elastic sheets are all arc-shaped.

[0020] According to the technical scheme, the outer limiting insulation sleeve is provided with an isolation combined assembly at the outer side end thereof.

[0021] The isolation combined assembly comprises a connecting adhesive pad.

[0022] The middle part of the outer limiting insulation sleeve is symmetrically bonded with a connecting adhesive pad at equal intervals, the outer side end of the connecting adhesive pad is bonded with a semicircular threaded ring, and the side end of the semicircular threaded ring is connected with a threaded integrated ring through threads.

[0023] The two threaded integrated rings are combined through a limiting bolt clamping, the side end of the threaded integrated ring is connected with a double-threaded flexible bellows through threads, and the inner side of the double-threaded flexible bellows is symmetrically bonded with a honeycomb bearing sheet.

[0024] Both outer side ends of the outer limiting insulation sleeve are bonded with a limiting bonding ring, and the side end of the limiting bonding ring is bonded with a porous sleeve cover.

[0025] The inner side end of the inner threaded limiting ring is connected with an outer threaded limiting cover through threads.

[0026] The outer threaded limiting cover is welded with a partition limiting pipe at a position corresponding to the one end of the porous sleeve cover, and a plurality of wire limiting holes are formed at equal intervals at the one end of the outer threaded limiting cover.

[0027] According to the technical scheme, the side ends of the two adjacent semicircular threaded rings are mutually attached, the two threaded integrated rings are hinged and combined, and the double-threaded flexible bellows and the porous sleeve cover are both two.

[0028] According to the technical scheme, the side end of the double-threaded flexible bellows is attached to the side end of the semicircular threaded ring, the two honeycomb bearing sheets are mutually slidingly attached, and the side end of the honeycomb bearing sheet is slidingly attached to the outer side end of the outer limiting insulation sleeve.

[0029] According to the technical scheme, the porous sleeve cover is connected with the outer threaded limiting cover in a sleeved manner, and the partition limiting pipe is combined with the porous sleeve cover in a sleeved manner.

[0030] Compared with the prior art, the present application has the following beneficial effects:

[0031] 1、Set up with internal measurement and external protection components, through the inner insulation sleeve, center insulation sleeve and inner shield strip to the hard buffer bar for heat treatment, using the internal absorption sponge pad and filled with heat transfer liquid heat absorption, heat transfer liquid evaporation to form steam, hot steam with elastic contact piece to the middle limit position bar and hollow separation elastic sleeve heat transfer, the heat is transmitted to the porous heat absorbing pad position, at this time again using heat transfer liquid heated to form steam to push the hollow separation elastic sleeve bidirectional expansion, pull the contact heat barrier strip movement, change the hollow separation elastic sleeve and elastic contact piece to remove the area, so as to adjust the heat transfer components and heat transfer position, change the area and speed of heat transfer, cooperate with the heat transfer fitting sleeve and profile insulation filling strip to increase the heat transfer area, and use the external staggered heat barrier strip to reduce the influence of the external environment on the internal cable, while ensuring the stable heat dissipation inside, so that the cable can avoid the situation that the internal temperature changes too much or overheats due to the failure of the heat transfer component to adjust itself, reduce the situation that the insulation components of the cable are accelerated due to continuous thermal expansion and cold contraction or excessive heating, improve the stability of the cable operation, and prolong its service life.

[0032] 2、Through the inner insulation sleeve and center insulation sleeve to double layer isolation of transmission line core, cooperate with the power processing strip for detection processing, realize insulation protection and leakage detection processing, through the staggered heat barrier strip to heat insulation treatment of transmission optical fiber, reduce the continuous high temperature to cause the optical fiber to heat bending, ensure the stable operation of the optical fiber, cooperate with the soft pad reset sleeve and isolation insulation sleeve to the optical fiber for elastic support, so that the cable can reduce the bending amplitude of the optical fiber when bending, reduce the influence of bending on the operation of the optical fiber, through the profile insulation filling strip, buffer porous shrinkage block and hard alignment piece to the outside end for independent limiting support and elastic contraction limit, realize the stable bearing isolation limit of the outside end, use the shrinkage processing to improve the influence on the inside of the cable under stress, ensure the stability of the operation of each position inside the cable.

[0033] 3、Through internal multi position synchronous heat conduction, multi point contact series heat conduction, heat transfer liquid gas liquid phase continuous change heat conduction, thermal expansion and cold shrinkage change transmission area, cooperate with the outside multi segment buffer support and telescopic limiting cooperation, so that the cable can ensure the stability of multi position operation, avoid the deformation of each component due to the extrusion of the cable inside, unable to normal operation, effectively solve the problem that the cable inside is not provided with self adjusting heat transfer component in the prior art, affect the heat dissipation and heat preservation effect of the cable, lead to the cable easy to appear cold and hot environment switching, lead to the cable continuously affected by thermal expansion and cold contraction, the insulation layer appears aging, and reduce the internal insulation layer damage under pressure, ensure the stability of the cable operation and the service life of the cable.

[0034] 4、Set up isolated combination assembly, through connecting adhesive pad, stick half circle screw thread ring to outer limit insulation sleeve side end, stick double screw thread flexible bellows and honeycomb bearing sheet to outer limit insulation sleeve side end, use limit bolt to restrict two screw thread integrated ring clamping, through screw thread to screw thread integrated ring, half circle screw thread ring and double screw thread flexible bellows combination connection, so that double screw thread flexible bellows is fixed to outer limit insulation sleeve side end, when cable bending, use two different deformation of double screw thread flexible bellows, cooperate with two honeycomb bearing sheet dislocation sliding, isolated protection to outer limit insulation sleeve of cable bending part, realize cable steady isolation limiting treatment, avoid insulation thinning of bending part due to stretching bending, through limit adhesive ring, stick multi-hole cover to outer limit insulation sleeve side end, pass transmission line core and transmission optical fiber through isolated limit pipe, stick electricity connection processing strip to isolated limit pipe side end, cooperate with internal screw thread limiting ring and external screw thread limiting cover mutual connection and fixation, realize connection positioning, isolated treatment to transmission line core, electricity connection processing strip and transmission optical fiber, realize steady electricity connection separation, through bending limiting protection and edge electricity connection separation protection, improve cable insulation effect and insulation stability, realize cable operation protection, improve protection effect and cable operation life.

[0035] In summary, through internal measurement and external protection assembly and isolated combination assembly mutual cooperation, use multi-section heat conduction switching cooperation, pressure isolation restriction, pressure shrinkage support and multi-section isolation protection, so that when cable laying and cable operation, can effectively elastic support and heat conduction isolation steady operation, improve the stability of cable self-protection, at the same time, use optical fiber transmission and leakage contact cooperate cable operation, realize internal self-measurement, data transmission and external elastic support, improve the functionality and use range of cable power transmission, at the same time, ensure the stability of cable operation, prolong the service life of cable. BRIEF DESCRIPTION OF DRAWINGS

[0036] The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and are included to provide a further understanding of the application, and are made a part of the description. It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the scope or spirit of the application. Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. Therefore, the scope of the present application should be determined by the following claims.

[0037] In the drawings:

[0038] Figure 1 is a schematic diagram of the three-dimensional structure of the present application;

[0039] Figure 2 is a schematic diagram of the internal measurement and external protection assembly of the present application;

[0040] Figure 3 is a schematic diagram of the installation structure of the heat conduction cooperation sleeve of the present application;

[0041] Figure 4 is a schematic diagram of the installation structure of the dislocation heat insulation strip of the present application;

[0042] Figure 5 is the schematic diagram of the installation structure of the hard buffer strip of the present application;

[0043] Figure 6 is the schematic diagram of the installation structure of the central insulation sleeve of the present application;

[0044] Figure 7 is the schematic diagram of the installation structure of the absorbing sponge pad of the present application;

[0045] Figure 8 is the schematic diagram of the structure of the isolation combination assembly of the present application;

[0046] Figure 9 is the schematic diagram of the installation structure of the semi-circular threaded ring of the present application;

[0047] Figure 10 is the schematic diagram of the installation structure of the limiting adhesive ring of the present application;

[0048] Figure reference: 1, transmission line core;

[0049] 2, inner measuring outer protection assembly; 201, inner insulation sleeve; 202, power connection processing strip; 203, central insulation sleeve; 204, inner protection shielding strip; 205, hard buffer strip; 206, heat exchange relay cavity; 207, elastic contact sheet; 208, middle limiting position strip; 209, absorbing sponge pad; 210, hollow separation elastic sleeve; 211, porous heat absorbing pad; 212, contact heat insulation strip; 213, heat conduction matching sleeve; 214, special-shaped insulation filling strip; 215, embedded limiting hole; 216, reinforcing positioning rib; 217, isolation insulation sleeve; 218, staggered heat insulation strip; 219, soft pad reset sleeve; 220, transmission optical fiber; 221, independent reset cavity; 222, buffer porous shrinkage block; 223, hard alignment sheet; 224, outer limiting shielding strip; 225, staggered heat insulation strip; 226, outer limiting insulation sleeve; 227, anti-piercing elastic sheet;

[0050] 3, isolation combination assembly; 301, connecting adhesive pad; 302, semi-circular threaded ring; 303, threaded integrated ring; 304, limiting bolt; 305, double-threaded flexible bellows; 306, honeycomb bearing sheet; 307, limiting adhesive ring; 308, porous sleeve cover; 309, inner threaded limiting ring; 310, outer threaded limiting cover; 311, separation limiting tube; 312, threading limiting hole. DETAILED DESCRIPTION

[0051] The preferred embodiments of the present application will be described below with reference to the accompanying drawings, and it should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0052] Embodiment: as Figures 1-10As shown, the present application provides a technical scheme, a multifunctional medium voltage cable for power transmission, comprising a transmission line core 1, the transmission line core 1 has three, realizing steady power transmission processing, the transmission line core 1 side end is provided with an inner and outer protective component 2;

[0053] The inner and outer protective component 2 comprises an inner and outer protective component 2, an inner and outer protective component 2, a center insulation sleeve 203, an inner and outer protective component 2, a hard buffer strip 205, a heat exchange relay cavity 206, an elastic contact sheet 207, a middle limiting position strip 208, a sponge pad 209, a hollow separation elastic sleeve 210, a porous heat absorbing pad 211, a contact heat insulation strip 212, a heat conduction matching sleeve 213, a special-shaped insulation filling strip 214, an embedded limiting hole 215, a reinforcing positioning rib 216, an isolation insulation sleeve 217, a staggered heat insulation strip 218, a soft pad reset sleeve 219, a transmission optical fiber 220, an independent reset cavity 221, a buffer porous shrinkage block 222, a hard alignment sheet 223, an outer limiting shielding strip 224, a staggered heat insulation strip 225, an outer limiting insulation sleeve 226 and a bulletproof elastic sheet 227;

[0054] The transmission line core 1 is sleeved with an inner and outer insulation sleeve 201 on the outer side, a plurality of power connection processing strips 202 are embedded and installed at equal intervals on the outer side of the inner and outer insulation sleeve 201, the inner and outer insulation sleeve 201 and the power connection processing strip 202 are sleeved with a center insulation sleeve 203 on the outer side, the inner diameter of the center insulation sleeve 203 is equal to the outer diameter of the inner and outer insulation sleeve 201, realizing steady double-layer insulation processing, avoiding the occurrence of external overheating and fire caused by electric leakage;

[0055] The center insulation sleeve 203 is wound with a plurality of inner shielding strips 204 at equal intervals on the outer side, a plurality of inner shielding strips 204 are laid with a hard buffer strip 205 on the outer side, the side ends of two adjacent hard buffer strips 205 are mutually adhered, realizing steady positioning restriction, ensuring internal mutual stringing and heat conduction, a plurality of heat exchange relay cavities 206 are provided at equal intervals on the inner side of the hard buffer strip 205;

[0056] A plurality of elastic contact sheets 207 are embedded and installed at equal intervals on the outer side of the hard buffer strip 205, and a plurality of elastic contact sheets 207 are laid with a middle limiting position strip 208 on the outer side;

[0057] The heat exchange relay cavity 206 is sleeved with a sponge pad 209 on the inner side of the bottom, and the middle limiting position strip 208 is bonded with a hollow separation elastic sleeve 210 on the outer side;

[0058] A plurality of porous heat-absorbing pads 211 are equidistantly sleeved inside the hollow partition elastic sleeve 210, and contact heat insulation strips 212 are symmetrically bonded to the outer side ends of the hollow partition elastic sleeve 210. The inner side bottom end of the elastic contact piece 207 is inserted and mounted inside the heat exchange relay cavity 206. The side ends of the contact heat insulation strips 212 are in sliding fit with the hard buffer strip 205 and the outer side end of the elastic contact piece 207, realizing internal and external alignment heat exchange treatment and linkage insulation treatment, ensuring the stability of temperature control. The longitudinal section of the contact heat insulation strip 212 is in the shape of a Chinese character "fang", realizing stable expansion and movement, ensuring the stability of contact heat dissipation and heat conduction removal. The outer side ends of the plurality of hollow partition elastic sleeves 210 and the contact heat insulation strips 212 are provided with heat conduction matching sleeves 213;

[0059] The side ends of the two heat conduction matching sleeves 213 are bonded with profiled insulation filling strips 214. A plurality of embedding limiting holes 215 are equidistantly formed at one end of the profiled insulation filling strip 214. A reinforcing positioning rib 216 is inserted and mounted inside the embedding limiting hole 215. There are nine reinforcing positioning ribs 216 and three profiled insulation filling strips 214, realizing outer positioning limitation and positioning isolation, ensuring the stability of support limiting and bending limitation.

[0060] The plurality of profiled insulation filling strips 214 are bonded with isolation insulation sleeves 217. The inner side ends of the isolation insulation sleeves 217 are equidistantly provided with staggered heat insulation strips 218. The inner side of the isolation insulation sleeve 217 is equidistantly provided with a soft pad reset sleeve 219.

[0061] A transmission optical fiber 220 is sleeved inside the soft pad reset sleeve 219. The staggered heat insulation strip 218 and the soft pad reset sleeve 219 each have two layers, realizing isolation protection of the internal transmission optical fiber 220, so that the transmission optical fiber 220 can be heat-insulated and protected and elastically limited and protected during long-term use of the cable, avoiding the transmission optical fiber 220 from being affected by extrusion and high temperature to cause bending. A plurality of independent reset cavities 221 are equidistantly formed inside the profiled insulation filling strip 214. A buffer porous shrinkage block 222 is bonded inside the independent reset cavity 221. A plurality of hard positioning pieces 223 are equidistantly bonded to the side ends of the buffer porous shrinkage block 222. The outer side end of the hard positioning piece 223 is bonded and connected with one end inside the independent reset cavity 221, realizing internal positioning clamping, increasing the contact heat conduction area, and improving the stability of heat conduction separation.

[0062] The outer side end of the plurality of special-shaped insulation filling strips 214 is equidistantly bonded with a plurality of outer limiting shielding strips 224, the outer side end of the plurality of outer limiting shielding strips 224 is paved with staggered heat insulation strips 225, the outer side end of the plurality of staggered heat insulation strips 225 is paved with outer limiting insulation sleeves 226, a plurality of anti-stabbing elastic sheets 227 are equidistantly embedded and installed in the inner side of the outer limiting insulation sleeves 226, the staggered heat insulation strips 225 and the anti-stabbing elastic sheets 227 are both two layers, and protection, isolation, heat insulation and limitation are realized, and the longitudinal sections of the electric connection processing strips 202, the inner protection shielding strips 204, the hard buffering strips 205, the elastic contact sheets 207, the middle limiting strips 208, the absorbing sponge pads 209, the hollow partition elastic sleeves 210, the porous heat absorbing pads 211, the staggered heat insulation strips 218, the hard counter sheets 223, the outer limiting shielding strips 224, the staggered heat insulation strips 225 and the anti-stabbing elastic sheets 227 are all arc-shaped, so that the stability of overall sleeving is ensured.

[0063] The outer side end of the outer limiting insulation sleeve 226 is provided with an isolation combined assembly 3.

[0064] The isolation combined assembly 3 comprises a connecting bonding pad 301, a semicircular threaded ring 302, a threaded integrated ring 303, a limiting bolt 304, a double-threaded flexible bellows 305, a honeycomb bearing sheet 306, a limiting bonding ring 307, a porous sleeve cover 308, an inner threaded limiting ring 309, an outer threaded limiting cover 310, a partition limiting pipe 311 and a threading limiting hole 312.

[0065] The middle part of the outer limiting insulation sleeve 226 is equidistantly and symmetrically bonded with the connecting bonding pad 301, the outer side end of the connecting bonding pad 301 is bonded with the semicircular threaded ring 302, the side ends of the two adjacent semicircular threaded rings 302 are mutually adhered, so that counter support and counter clamping are realized, the side end of the semicircular threaded ring 302 is connected with the threaded integrated ring 303 through threads, the two threaded integrated rings 303 are hinged and combined, so that the threaded integrated ring 303 is clamped and limited in connection.

[0066] The two threaded integrated rings 303 are clamped and combined through the limiting bolt 304, the side end of the threaded integrated ring 303 is connected with the double-threaded flexible bellows 305 through threads, the side end of the double-threaded flexible bellows 305 is adhered with the side end of the semicircular threaded ring 302, so that sealing adhesion and sealing isolation are realized, the inner side of the double-threaded flexible bellows 305 is symmetrically bonded with the honeycomb bearing sheet 306, the two honeycomb bearing sheets 306 are mutually slidably adhered, the side end of the honeycomb bearing sheet 306 is slidably adhered with the outer side end of the outer limiting insulation sleeve 226, so that the stability of bearing limitation and buffer contact is ensured.

[0067] The outer limiting insulation sleeve 226 is bonded with the limiting bonding ring 307 at both outer ends, the limiting bonding ring 307 is bonded with the porous sleeve cover 308 at the side end, the double-threaded flexible bellows 305 and the porous sleeve cover 308 are both two, so that isolation limitation at the bending part and both ends is ensured, and the stability of paving is ensured.

[0068] The porous sleeve cover 308 is rotationally connected with a female threaded limiting ring 309 at one end, and the female threaded limiting ring 309 is connected with a male threaded limiting cover 310 at the inner side end through threads;

[0069] The male threaded limiting cover 310 is welded with a partition limiting pipe 311 at the position corresponding to the porous sleeve cover 308 at one end, the porous sleeve cover 308 is connected with the male threaded limiting cover 310 in a sleeve manner, the partition limiting pipe 311 is combined with the porous sleeve cover 308 in a sleeve manner, multi-section sleeve isolation and sleeve protection are realized, isolation limitation and isolation limiting of the transmission line core 1 are ensured, and a plurality of wire limiting holes 312 are equidistantly formed at one end of the male threaded limiting cover 310.

[0070] The working principle and use process of the present application are as follows: when laying a medium-voltage cable, a worker guides and lays the cable along the laying route, bonds the connecting bonding pad 301 to the curved position of the outer limiting insulation sleeve 226 through bonding glue, bonds the semicircular threaded ring 302 to the side end of the outer limiting insulation sleeve 226 by using the connecting bonding pad 301, adheres the double-threaded flexible bellows 305 to the outer side end of the outer limiting insulation sleeve 226, realizes that both ends of the double-threaded flexible bellows 305 are adhered to the side end of the semicircular threaded ring 302, adheres the honeycomb bearing piece 306 to the side end of the outer limiting insulation sleeve 226, sleeves the threaded-to-threaded integrated ring 303 to the side end of the outer limiting insulation sleeve 226, and realizes positioning and limiting of the two threaded-to-threaded integrated rings 303 by using the limiting bolt 304 to clamp and limit the two threaded-to-threaded integrated rings 303.

[0071] At this time, the threaded-to-threaded integrated ring 303 is rotated, the threaded-to-threaded integrated ring 303, the semicircular threaded ring 302 and the double-threaded flexible bellows 305 are combined and connected, so that the double-threaded flexible bellows 305 is fixed to the side end of the outer limiting insulation sleeve 226, at this time, the double-threaded flexible bellows 305 on the cable bending pushing side is stretched, and the double-threaded flexible bellows 305 on the other side is compressed, at the same time, the two honeycomb bearing pieces 306 are misaligned and slid, the outer limiting insulation sleeve 226 at the cable bending position is isolated and protected, cable steady isolation limiting processing is realized, and the situation that the insulation at the bending position is thinned due to stretching bending is avoided;

[0072] The fixed limit adhesive ring 307 is fixed to the outer limit of the insulating sleeve 226 by using adhesive, and the multi-hole sleeve cover 308 is adhered by using the fixed limit adhesive ring 307, and the inner end of the multi-hole sleeve cover 308 is attached to the side end of the outer limit of the insulating sleeve 226, and the transmission line core 1 and the transmission optical fiber 220 pass through the partitioning limiting tube 311, the power connection processing strip 202 is attached to the side end of the partitioning limiting tube 311, the connecting line of the external detection device is connected with the power connection processing strip 202, and the connecting line passes through the wire limiting hole 312, at this time, the inner screw thread limiting ring 309 is rotated, and the inner screw thread limiting ring 309 and the outer screw thread limiting cover 310 are connected and fixed by using threads, the connection and positioning are realized, the transmission line core 1, the power connection processing strip 202 and the transmission optical fiber 220 are isolated and processed, and stable power connection separation is realized.

[0073] During laying, the side end of the outer limit of the insulating sleeve 226 contacts the side end of the laying position, at this time, the special-shaped insulating filling strip 214 is deformed under the action of the self-weight of the cable, and the deformation is different at different positions, the buffer multi-hole shrinkage block 222 in the independent reset cavity 221 is deformed and shrunk and folded, at this time, the hard alignment sheet 223 bears the stress position, realizes multi-position elastic shrinkage bearing limitation, and the internal multiple special-shaped insulating filling strips 214 are pressed against each other, realizes stable buffering, reduces direct extrusion on the position of the internal transmission line core 1, reduces the deformation degree of each power transmission part, and improves the stability during operation.

[0074] During the use of the medium-voltage cable, power transmission is processed by three transmission line cores 1, at this time, the transmission line core 1 generates heat due to its own resistance, and the heat is conducted by the inner special-shaped insulating sleeve 201 and the center insulating sleeve 203, during the operation of the cable, the transmission line core 1 is insulated by the inner special-shaped insulating sleeve 201, at the same time, the power connection processing strip 202 conducts electricity to the inner special-shaped insulating sleeve 201, at this time, the external micro-current detection device detects the current of the power connection processing strip 202, so that the actual situation inside the cable can be accurately and quickly understood when the inner special-shaped insulating sleeve 201 is aged and split or damaged due to continuous heating during long-time use.

[0075] The inner shielding strip 204 isolates and shields the internal transmission core 1, and together with the inner insulating sleeve 201 and the central insulating sleeve 203, provides double-layer isolation protection to achieve internal interference shielding. At this time, the internal heat is conducted outward to the position of the rigid buffer strip 205, and the heat is transferred to the inside of the heat exchange relay cavity 206, where it conducts heat to the absorbent sponge pad 209 that has absorbed the heat conduction fluid. The heat conduction fluid and the absorbent sponge pad 209 absorb heat, and the heat conduction fluid is slowly evaporated to form hot vapor. The main component of the heat conduction fluid is perfluoropolyether, which is a low molecular weight synthetic fluorinated liquid with an evaporation temperature of 80℃. The operating temperature of the cable is between 60℃ and 90℃, so it can be steadily heated and evaporated during heat conduction. The hot vapor diffuses to the inner end of the elastic contact piece 207. When the hot vapor comes into contact with the elastic contact piece 207, the heat of the hot vapor decreases, forming condensate, which flows back. At the position of the absorbent sponge pad 209, liquid recycling and reuse are achieved. Heat is transferred to the inside of the hollow partition elastic sleeve 210 through the elastic contact piece 207 and the central limiting strip 208. At this time, the porous heat-absorbing pad 211 inside absorbs the heat, repeating the above steps of slow evaporation of the heat conduction liquid to achieve heat outward. When the heat conduction liquid is heated to form hot steam, the hot steam pushes the hollow partition elastic sleeve 210 to expand outward and inward at the same time. The expanded hollow partition elastic sleeve 210 pulls the contact heat insulation strip 212 to move along the elastic contact piece 207, changing the contact surface between the elastic contact piece 207 and the hollow partition elastic sleeve 210, changing the internal heat conduction speed. By using the two-stage liquid heat absorption and contact heat conduction treatment, internal heat balance treatment and heat residue treatment are achieved, stabilizing the internal temperature and avoiding the internal temperature being greatly affected by the external environment, thus preventing the occurrence of internal temperature instability.

[0076] Internal heat is transferred outward along the heat-conducting sleeve 213 to the location of the shaped insulating filler strip 214. The shaped insulating filler strip 214 increases the outward heat conduction area, achieving heat dispersion and improving heat dissipation stability. The reinforcing positioning rib 216 embedded in the limiting hole 215 supports and positions the inner end of the shaped insulating filler strip 214, thereby restricting the positioning of the insulating sleeve 217. At this time, the misaligned heat insulation strip 218 provides heat insulation treatment for both the inside and outside, and the soft pad reset sleeve 219 provides elastic buffering for the transmission optical fiber 220. This allows the transmission optical fiber 220 to reduce the bending amplitude when bending slightly, improving the stability of the transmission optical fiber 220 operation, reducing the impact of cable bending and continuous high temperature on the transmission optical fiber 220, and using the outer limiting shielding strip 224 to isolate and shield multiple sets of transmission cores 1 internally and externally, reducing the impact of external signals and electromagnetic fields on the internal cores, using the staggered heat insulation strip 225 to provide heat insulation treatment for both internal and external parts, and using the anti-puncture elastic sheet 227 to strengthen the limiting, reducing the damage of the external environment to the cable insulation layer, and improving the stability and safety of cable operation.

[0077] Finally, it should be noted that the above only describes the preferred examples of the present application, and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that modifications can be made to the technical solutions described in the foregoing embodiments, or some of the technical features thereof can be replaced equivalently, without departing from the spirit and principle of the present application. Any modifications, equivalent replacements, improvements, 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 multi-functional medium voltage cable for power transmission comprising a transmission core (1), characterized in that: The transmission line core (1) side end is provided with an inner measuring outer protection assembly (2); The inner measuring outer protection assembly (2) comprises an inner insulation sleeve (201); The transmission line core (1) outer side end is sleeved with an inner insulation sleeve (201), and the outer side end of the inner insulation sleeve (201) is embedded with a plurality of electric connection processing strips (202) at equal intervals, and the outer side end of the inner insulation sleeve (201) and the electric connection processing strip (202) is sleeved with a center insulation sleeve (203); The center insulation sleeve (203) is wrapped with a plurality of inner protection shielding strips (204) at equal intervals on the outer side, and the outer side end of the plurality of inner protection shielding strips (204) is laid with a hard buffer strip (205), and the inner side of the hard buffer strip (205) is provided with a plurality of heat exchange relay cavities (206) at equal intervals; The outer side end of the hard buffer strip (205) is embedded with a plurality of elastic contact sheets (207) at equal intervals, and the outer side end of the plurality of elastic contact sheets (207) is laid with a middle limiting positioning strip (208); The inner side of the heat exchange relay cavity (206) is sleeved with a suction sponge pad (209), the outer side end of the middle limiting positioning strip (208) is bonded with a hollow separation elastic sleeve (210), and the inner side of the hollow separation elastic sleeve (210) is sleeved with a plurality of porous heat absorbing pads (211) at equal intervals; The outer side end of the hollow separation elastic sleeve (210) is symmetrically bonded with a contact heat insulation strip (212), the inner side bottom end of the elastic contact sheet (207) is inserted and installed in the inner side of the heat exchange relay cavity (206), and the side end of the contact heat insulation strip (212) is slidingly attached to the outer side end of the hard buffer strip (205) and the elastic contact sheet (207); The inner side of the heat exchange relay cavity (206) is sleeved with a suction sponge pad (209), the outer side end of the middle limiting positioning strip (208) is bonded with a hollow separation elastic sleeve (210), and the inner side of the hollow separation elastic sleeve (210) is sleeved with a plurality of porous heat absorbing pads (211) at equal intervals; 2. A multi-functional medium voltage power cable for power transmission according to claim 1, characterized in that, The outer side end of the hollow separation elastic sleeve (210) is symmetrically bonded with a contact heat insulation strip (212), the inner side bottom end of the elastic contact sheet (207) is inserted and installed in the inner side of the heat exchange relay cavity (206), and the side end of the contact heat insulation strip (212) is slidingly attached to the outer side end of the hard buffer strip (205) and the elastic contact sheet (207); 3. A multi-functional medium voltage power cable for power transmission according to claim 1, characterized in that, The inner side of the suction sponge pad (209) is filled with heat conducting liquid, and the composition of the heat conducting liquid is perfluoropolyether. The transmission line core (1) has three roots, the inner diameter of the center insulation sleeve (203) is equal to the outer diameter of the inner insulation sleeve (201), and the side ends of two adjacent hard buffer strips (205) are attached to each other. The outer side end of the plurality of hollow separation elastic sleeves (210) and the contact heat insulation strips (212) is laid with a heat conduction matching sleeve (213); The side ends of the two heat conduction matching sleeves (213) are bonded with a special-shaped insulation filling strip (214), one end of the special-shaped insulation filling strip (214) is provided with a plurality of embedded limiting holes (215) at equal intervals, and the embedded limiting holes (215) are inserted and installed with a reinforcing positioning rib (216) on the inner side; A plurality of special-shaped insulation filling strips (214) are bonded with an isolation insulation sleeve (217), the inner side end of the isolation insulation sleeve (217) is laid with a staggered heat insulation strip (218), and the inner side of the isolation insulation sleeve (217) is provided with a soft pad reset sleeve (219) at equal intervals; The inner side of the soft pad reset sleeve (219) is sleeved with a transmission optical fiber (220), the inner side of the special-shaped insulation filling strip (214) is provided with a plurality of independent reset cavities (221) at equal intervals, the inner side of the independent reset cavity (221) is bonded with a buffer porous shrinkage block (222), and the side end of the buffer porous shrinkage block (222) is bonded with a plurality of hard alignment sheets (223) at equal intervals.

4. A multi-functional medium voltage power cable according to claim 3, c h a r a c t e r i s e d in that A plurality of the profiled insulation filling strips (214) are equidistantly bonded with a plurality of outer limit shielding strips (224) at the outer ends, a plurality of the outer limit shielding strips (224) are paved with staggered heat insulation strips (225) at the outer ends, a plurality of the staggered heat insulation strips (225) are paved with outer limit insulation sleeves (226) at the outer ends, and a plurality of anti-stabbing elastic sheets (227) are equidistantly embedded and installed in the inner side of the outer limit insulation sleeves (226); The longitudinal section of the contact heat insulation strip (212) is in the shape of a Chinese character.

5. A multi-functional medium voltage power cable according to claim 4, c h a r a c t e r i s e d in that Both the staggered heat insulation strip (218) and the soft cushion reset sleeve (219) have two layers, the outer end of the hard counter sheet (223) is bonded and connected with one end of the independent reset cavity (221) at the inner side, and both the staggered heat insulation strip (225) and the anti-stabbing elastic sheet (227) have two layers.

6. A multi-functional medium voltage power cable for power transmission according to claim 4, characterized in that, The nine reinforcing positioning ribs (216), the three profiled insulation filling strips (214), the longitudinal sections of the electric contact processing strip (202), the inner shielding strip (204), the hard buffer strip (205), the elastic contact sheet (207), the middle limiting strip (208), the sponge pad (209), the hollow partition elastic sleeve (210), the porous heat absorption pad (211), the staggered heat insulation strip (218), the hard counter sheet (223), the outer limit shielding strip (224), the staggered heat insulation strip (225), and the anti-stabbing elastic sheet (227) are all in the shape of an arc.

7. A multi-functional medium voltage power cable for power transmission according to claim 4, characterized in that, The outer end of the outer limit insulation sleeve (226) is provided with an isolation combined assembly (3); The isolation combined assembly (3) comprises a connecting adhesive pad (301); The outer limit insulation sleeve (226) is equidistantly and symmetrically bonded with a connecting adhesive pad (301) at the middle part, the outer end of the connecting adhesive pad (301) is bonded with a semicircular threaded ring (302), and the side end of the semicircular threaded ring (302) is connected with a threaded integrated ring (303) through threads; The two threaded integrated rings (303) are clamped and combined through limiting bolts (304), the side end of the threaded integrated ring (303) is connected with a double-threaded flexible bellows (305) through threads, and the inner side of the double-threaded flexible bellows (305) is symmetrically bonded with a honeycomb bearing sheet (306); Both the outer ends of the outer limit insulation sleeve (226) are bonded with a limit bonding ring (307), and the side end of the limit bonding ring (307) is bonded with a porous sleeve cover (308); One end of the porous sleeve cover (308) is rotationally connected with an internal thread limiting ring (309), and the inner side end of the internal thread limiting ring (309) is connected with an external thread limiting cover (310) through threads; The outer thread limiting cover (310) is welded with a partition limiting pipe (311) at a position corresponding to one end of the porous sleeve cover (308), and a plurality of threading limiting holes (312) are equidistantly formed at one end of the outer thread limiting cover (310).

8. A multi-functional medium voltage power cable for power transmission according to claim 7, characterized in that The side ends of the adjacent two semicircular threaded rings (302) are mutually adhered, the two threaded integrated rings (303) are hinged and combined, and both the double-threaded flexible bellows (305) and the porous sleeve cover (308) have two.

9. A multi-functional medium voltage power cable for power transmission according to claim 7, characterized in that, The double thread flexible bellows (305) side end is attached to the semi-circular thread ring (302) side end, and the two honeycomb bearing pieces (306) are attached to each other, and the honeycomb bearing piece (306) side end is attached to the outer side end of the outer limit insulation sleeve (226).

10. A multi-functional medium voltage power cable for power transmission according to claim 7, characterized in that, The multi-hole sleeve cover (308) is connected with the outer thread limiting cover (310), and the partition limiting pipe (311) is combined with the multi-hole sleeve cover (308).

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