Plug-in insulated power cable for power construction

Abstract

The application relates to the technical field of power cables, and discloses a plug-in type insulated power cable for power construction, which comprises a cable body, a male plug is installed at the left end of the cable body, the right end of the male plug is of a conical structure, and a butt joint sleeve is fixedly sleeved on the outer wall of the right end of the male plug and located at the left end of the conical structure. The plug-in type insulated power cable for power construction can effectively solve the problems that the plug-in type power cable still has some defects in actual application in the prior art, that is, firstly, the root part of the cable and the plug is a rigid constraint area, stress concentration is prominent, effective gradient buffering and bending limiting are lacked when the cable is subjected to self-weight sagging and wiring bending, excessive bending, insulation layer damage and conductor fatigue fracture are prone to occur; and secondly, the matched protection structure is mostly assembled by relying on fasteners, is complicated to assemble and disassemble, is difficult to adapt to the requirement of rapid construction, and is inconvenient to adjust the arrangement of the protection assembly and replace the components, so the operation and maintenance cost is high.

Description

Technical Field

[0001] This invention relates to the field of power cable technology, and specifically to a plug-in insulated power cable for power construction. Background Technology

[0002] Power cables are the core carriers for transmitting and distributing electrical energy in power systems. With their advantages of reliable power supply and minimal environmental impact, they are widely used in urban power distribution networks, industrial and mining enterprises, building power distribution, and many other scenarios. In power construction, on-site cable connection is a critical process. Traditional methods such as crimping, wrapping, and cold / heat shrinking joints generally suffer from drawbacks such as cumbersome procedures, long work cycles, and reliance on personnel skill levels for construction quality. In contrast, plug-in power cables can achieve rapid connection through prefabricated male and female plug-in structures, significantly simplifying on-site operations.

[0003] In response to this, this application designs a plug-in insulated power cable for power construction. Existing plug-in power cables can greatly simplify the on-site connection process with their prefabricated plug-in structure, but they still have some shortcomings in practical applications: First, the connection root between the cable and the plug is a rigid constraint area, with prominent stress concentration. When the cable is subjected to its own weight and bending during laying, there is a lack of effective gradient buffer and bending limit, which can easily lead to excessive bending, insulation damage, and conductor fatigue fracture. Second, existing supporting protective structures mostly require fasteners for assembly, making the assembly and disassembly process cumbersome. This cannot be adapted to the rapid construction characteristics of plug-in cables, and it is difficult to flexibly adjust the arrangement of protective components and replace damaged parts, resulting in high maintenance costs. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a plug-in insulated power cable for power construction, which effectively solves some deficiencies in the practical application of plug-in power cables in existing technologies: First, the connection root between the cable and the plug is a rigid constraint area with prominent stress concentration. When subjected to its own weight and bending, it lacks effective gradient buffering and bending limit, making it prone to excessive bending, insulation layer damage, and conductor fatigue fracture. Second, the supporting protective structures mostly rely on fastener assembly, which is cumbersome to install and disassemble, making it difficult to adapt to the needs of rapid construction. Furthermore, the arrangement and adjustment of protective components and the directional replacement of parts are inconvenient, resulting in high operation and maintenance costs.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a plug-in insulated power cable for power construction, comprising: The cable body has a male plug installed on the left end, and the right end of the male plug has a tapered structure. A mating sleeve is fixedly fitted on the outer wall of the right end of the male plug at the left end of the tapered structure. The cable body and the male plug are both provided with a bending protection part, and the mating sleeve and the bending protection part are both provided with a mating installation part. The bending protection section includes positioning rubber strips that are symmetrically fixedly fitted on the outer wall of the end of the cable body near the male plug. An installation sleeve is movably fitted on the tapered structure on the right end of the male plug and the outer wall of the cable body. A flexible hollow skeleton is installed on the right end of the installation sleeve and fitted on the outside of the cable body. A closing sealing plate is detachably installed on the inner wall of the right end of the flexible hollow skeleton. The closing sealing plate is movably fitted on the outer wall of the cable body. A bending protection group is provided on the bending protection section corresponding to the positioning rubber strip.

[0006] Furthermore, the positioning rubber strips are fixedly sleeved in several groups, and the groups of positioning rubber strips are linearly and evenly distributed along the extension direction of the cable body. Each group of positioning rubber strips consists of two adjacent positioning rubber strips, and the positioning rubber strips are arc-shaped strip structures with rounded corners on the outer wall. The flexible hollow skeleton has several operating holes that are evenly distributed in a circle on the outer wall.

[0007] Furthermore, the mounting part includes an arc-shaped slot located at the right end of the mating sleeve corresponding to the mounting sleeve. There are two arc-shaped slots, which are evenly distributed around the circumference. An arc-shaped groove is also provided in the middle of the inner wall of the arc-shaped slot, and the two arc-shaped grooves are also evenly distributed around the circumference.

[0008] Furthermore, the mounting part also includes an arc-shaped baffle that is slidably mounted on the inner wall of the left end of the arc-shaped slot by a compression spring. The end of the arc-shaped baffle near the mounting sleeve has a wedge-shaped structure, and the end of the arc-shaped baffle facing the arc-shaped slot has a C-shaped groove structure. The arc-shaped slot is located on the inner wall of the left side of the arc-shaped slot. A C-shaped protruding structure is integrally installed on the C-shaped groove structure corresponding to the arc-shaped baffle. A locking assembly is provided on the mounting sleeve corresponding to the arc-shaped slot.

[0009] Furthermore, the bending protection assembly includes buffer disc one and buffer disc two located within the flexible hollow frame. Several sets of buffer disc one and buffer disc two are provided, and these sets of buffer disc one and buffer disc two are also linearly and evenly distributed along the extension direction of the cable body. Buffer disc one is located to the left of buffer disc two, and the outer walls of buffer disc one and buffer disc two are movably attached to the inner wall of the flexible hollow frame. The inner walls of buffer disc one and buffer disc two are movably sleeved on the outer wall of the cable body.

[0010] Furthermore, buffer disk one is located to the left of buffer disk two. Buffer disk one is made of high-hardness material, while buffer disk two is made of medium-hardness material. Buffer disk one has a ring structure, while buffer disk two consists of a ring plate and a conical plate located to its right.

[0011] Furthermore, the bending protection assembly also includes notches and grooves on the inner walls of buffer disc one and buffer disc two. The notches and grooves are arc-shaped and there are two notches and grooves. The two notches and grooves are evenly distributed around the circumference and are staggered with the corresponding two positioning rubber strips. The corresponding positioning rubber strips on the inner walls of buffer disc one and buffer disc two are provided with receiving cavities. The receiving cavities are U-shaped and the outer walls of the positioning rubber strips are movably fitted to the inner walls of the corresponding receiving cavities.

[0012] Furthermore, the bending protection assembly also includes two integrated arc-shaped contact plates located at the end of buffer plate two facing buffer plate one, corresponding to two positioning rubber strips. The end of the arc-shaped contact plate facing buffer plate one is embedded with a positioning magnet, and the end of buffer plate one facing buffer plate two is also embedded with a positioning magnet. The outer walls of buffer plate one, buffer plate two and arc-shaped contact plates are all rounded.

[0013] Furthermore, the locking assembly includes a support rod installed at the end of the mounting sleeve facing the mating sleeve. There are two support rods, which are evenly distributed around the circumference. An arc-shaped locking plate is installed at the end of the support rod away from the mounting sleeve. The arc-shaped locking plate has an arc-shaped structure, and the outer wall of the arc-shaped locking plate is movably attached to the inner wall of the corresponding arc-shaped locking groove.

[0014] The technical solution provided by this invention has the following advantages compared with the prior art: This invention provides a plug-in insulated power cable for power construction. During the cable bending protection phase, when the cable body sags due to its own weight and bends during laying, the inner side of the buffer disc 1 and the arc-shaped contact plate end face of the buffer disc 2 approach each other. The medium-hardness buffer disc 2 first elastically contacts the buffer disc 1 through the arc-shaped contact plate, generating a controllable compression to achieve bending buffer. As the bending angle increases, the high-hardness buffer disc 1 acts as a rigid limit stop point, rigidly resisting the buffer disc 2 to limit the bending curvature within the allowable range. The conical plate of the buffer disc 2 disperses the edge bending stress, and the alignment magnet and positioning rubber strip maintain the alignment accuracy of the buffer disc and limit circumferential deflection. This graded protection structure can prevent the insulation layer from being damaged and the conductor from fatigue fracture due to excessive bending of the cable body, and solves the problem that the root of the traditional limit structure is prone to damage first. The structure is simple and highly reliable, and can be adapted to complex outdoor working conditions for a long time.

[0015] First, remove the closing sealing plate, then rotate each set of buffer discs one and two in sequence to disengage the magnetic magnets. Once the notch of the buffer disc is aligned with the positioning rubber strip, remove it to the right to complete the removal and replacement of the buffer disc. Next, press the arc-shaped baffles on both sides to retract them, and rotate the flexible hollow frame and mounting sleeve in the opposite direction to drive the arc-shaped clamping plate out of the arc-shaped clamping slot. Then, pull it to the right to remove the entire protective frame. The disassembly process corresponds to the assembly process in reverse, making the operation convenient. It can be completed with simple tools or by manual pressing, which facilitates the targeted replacement of aging and damaged parts without scrapping the entire cable body. It has low maintenance costs and strong adaptability. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure in an embodiment of the present invention; Figure 2 This is a schematic diagram of the three-dimensional separation of the cable body and the bending protection part in an embodiment of the present invention; Figure 3 This is a schematic diagram of the three-dimensional separation of the bending protective part in an embodiment of the present invention; Figure 4 This is a schematic diagram of the three-dimensional separation of buffer disk one and buffer disk two in an embodiment of the present invention; Figure 5 This is a schematic diagram of a partial three-dimensional cross-section of buffer disk one and buffer disk two in an embodiment of the present invention; Figure 6 For the present invention Figure 5 A magnified structural diagram of section X in the middle; Figure 7 This is a schematic diagram of a partial three-dimensional cross-section of the docking sleeve in an embodiment of the present invention; Figure 8 This is a three-dimensional structural diagram showing the separation of the mating sleeve, the bending protective part, and the mating installation part in an embodiment of the present invention; Figure 9 This is a three-dimensional structural diagram showing the separation of the mating sleeve and the fitting mounting part in an embodiment of the present invention; Figure 10 This is a three-dimensional structural diagram of the mounting sleeve, flexible hollow frame, and snap-fit ​​assembly in an embodiment of the present invention.

[0018] The labels in the diagram represent: 1. Cable body; 2. Male plug; 3. Connecting sleeve; 4. Bending protection section; 41. Positioning rubber strip; 42. Mounting sleeve; 43. Flexible hollow frame; 44. Closing sealing plate; 45. Bending protection assembly; 451. Buffer plate one; 452. Buffer plate two; 453. Notch groove; 454. Receiving cavity; 455. Arc-shaped contact plate; 456. Alignment magnet; 5. Mating mounting section; 51. Arc-shaped slot; 52. Arc-shaped groove; 53. Arc-shaped baffle; 54. Clamping assembly; 541. Support rod; 542. Arc-shaped clamping plate. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] The present invention will be further described below with reference to embodiments.

[0021] Example:

[0022] Please see Figures 1-10 This invention provides a technical solution: a plug-in insulated power cable for power construction, comprising: The cable body 1 has a male plug 2 installed on the left end of the cable body 1. The right end of the male plug 2 is a tapered structure, and a mating sleeve 3 is fixedly sleeved on the outer wall of the right end of the male plug 2 at the left end of the tapered structure. The cable body 1 and the male plug 2 are jointly provided with a bending protection part 4, and the mating sleeve 3 and the bending protection part 4 are jointly provided with a mating installation part 5. The bending protection part 4 includes a positioning rubber strip 41 that is symmetrically fixedly sleeved on the outer wall of the end of the cable body 1 near the male plug 2. An installation sleeve 42 is movably sleeved on the tapered structure at the right end of the male plug 2 and the outer wall of the cable body 1. A flexible hollow skeleton 43 is installed on the right end of the installation sleeve 42 and sleeved on the outside of the cable body 1. A closing sealing plate 44 is detachably installed on the inner wall of the right end of the flexible hollow skeleton 43. The closing sealing plate 44 is movably sleeved on the outer wall of the cable body 1. A bending protection group 45 is provided on the bending protection part 4 corresponding to the positioning rubber strip 41.

[0023] The positioning rubber strips 41 are fixedly sleeved in several groups. The groups of positioning rubber strips 41 are linearly and evenly distributed along the extension direction of the cable body 1. Each group of positioning rubber strips 41 consists of two adjacent positioning rubber strips 41. The positioning rubber strips 41 are arc-shaped strip structures with rounded corners on the outer wall. The flexible hollow skeleton 43 has several operating holes that are evenly distributed in a circle on the outer wall.

[0024] The mounting part 5 includes an arc-shaped slot 51 located at the right end of the docking sleeve 3 corresponding to the mounting sleeve 42. There are two arc-shaped slots 51, which are evenly distributed around the circumference. An arc-shaped groove 52 is also provided in the middle of the inner wall of the arc-shaped slot 51, and the two arc-shaped grooves 52 are also evenly distributed around the circumference.

[0025] The mounting part 5 also includes an arc-shaped baffle 53 that is slidably mounted on the inner wall of the left end of the arc-shaped slot 51 by a compression spring. The end of the arc-shaped baffle 53 near the mounting sleeve 42 has a wedge-shaped structure, and the end of the arc-shaped baffle 53 facing the arc-shaped slot 52 has a C-shaped groove structure. The arc-shaped slot 51 is located on the inner wall of the left side of the arc-shaped slot 52. A C-shaped protruding structure is integrally installed corresponding to the C-shaped groove structure of the arc-shaped baffle 53. A locking assembly 54 is provided on the mounting sleeve 42 corresponding to the arc-shaped slot 52.

[0026] The bending protection group 45 includes a buffer plate 451 and a buffer plate 452 located inside the flexible hollow frame 43. Several sets of buffer plates 451 and 452 are provided. The several sets of buffer plates 451 and 452 are linearly and evenly distributed along the extension direction of the cable body 1. Buffer plate 451 is located to the left of buffer plate 452. The outer walls of buffer plates 451 and 452 are movably attached to the inner wall of the flexible hollow frame 43. The inner walls of buffer plates 451 and 452 are movably sleeved on the outer wall of the cable body 1.

[0027] Buffer disk 1 451 is located to the left of buffer disk 2 452. Buffer disk 1 451 is made of high hardness material, while buffer disk 2 452 is made of medium hardness material. Buffer disk 1 451 has a ring structure, while buffer disk 2 452 consists of a ring plate and a conical plate located to its right. Both buffer disk 1 451 and buffer disk 2 452 have internal grooves on their outer walls to increase friction.

[0028] The bending protection assembly 45 also includes notches 453 on the inner walls of buffer plate one 451 and buffer plate two 452. The notches 453 are arc-shaped and there are two notches 453. The two notches 453 are evenly distributed around the circumference and are staggered with the corresponding two positioning rubber strips 41. The corresponding positioning rubber strips 41 on the inner walls of buffer plate one 451 and buffer plate two 452 are provided with receiving cavities 454. The receiving cavities 454 are U-shaped and the outer walls of the positioning rubber strips 41 are movably attached to the inner walls of the corresponding receiving cavities 454.

[0029] The bending protection assembly 45 also includes two integrated arc-shaped contact plates 455 located at the end of the second buffer plate 452 facing the first buffer plate 451, corresponding to two positioning rubber strips 41. The end of the arc-shaped contact plate 455 facing the first buffer plate 451 is embedded with a positioning magnet 456. The end of the first buffer plate 451 facing the second buffer plate 452 is also embedded with a positioning magnet 456 corresponding to the two arc-shaped contact plates 455. The outer walls of the first buffer plate 451, the second buffer plate 452, and the arc-shaped contact plates 455 are all rounded.

[0030] The locking assembly 54 includes a support rod 541 installed at the end of the mounting sleeve 42 facing the docking sleeve 3. There are two support rods 541, which are evenly distributed around the circumference. An arc-shaped locking plate 542 is installed at the end of the support rod 541 away from the mounting sleeve 42. The arc-shaped locking plate 542 has an arc-shaped structure, and the outer wall of the arc-shaped locking plate 542 is movably attached to the inner wall of the corresponding arc-shaped locking groove 52.

[0031] In practice: Firstly, the quick-connect splicing and joint end drooping protection for insulated power cables in power construction scenarios described in this application, through the cooperation of the male plug 2, the bending protection part 4, and the mating installation part 5, avoids the problems of excessive bending, insulation layer damage, and conductor fatigue fracture caused by rigid constraints, stress concentration, and lack of effective protection at the joint root in traditional plug-in power cables. Specifically, the mating installation part 5 provides stable axial locking and circumferential limiting for the bending protection part 4 when it is assembled onto or disassembled from the male plug 2, preventing the structure on the bending protection part 4 from being dragged or bent by the cable body 1. If loosening or displacement occurs during the bending process, the bending protection section 4 ensures precise coverage of the high-stress area at the joint root throughout the entire process. The bending protection section 4 is used after the male and female connectors of the cable body 1 are connected and the cable body 1 is laid and put into operation. Based on the preset minimum allowable bending radius of the cable body 1, the internal graded buffering and synergistic action, together with the circumferential positioning of the positioning rubber strip 41 and the external support of the flexible hollow skeleton 43, provides gradient buffering and bending protection for the root of the cable body 1 on the side close to the male connector 2. This achieves integrated operation of rapid on-site construction and assembly of the cable body 1 and long-term reliable operation protection.

[0032] It should be noted that the male plug 2 with the mating sleeve 3 is pre-installed on the left end of the cable body 1, while the male / female plug is not installed on the right end of the cable body 1 for the time being, so as to facilitate the installation of the bending protection part 4. In the initial state, the arc-shaped baffle 53 is in the initial position of the right end of the arc-shaped slot 51 under the action of the compression spring. The bending protection part 4 is an independent pre-installed component, in which the mounting sleeve 42 and the mating sleeve 3 are in a separate state, and the closing sealing plate 44 and the bending protection group 45 are both in a state to be installed.

[0033] During the assembly and fixing stage of the bending protection part 4, the operator first slips the mounting sleeve 42 and the flexible hollow frame 43 onto the right end of the cable body 1 and pushes them to the left along the axial direction of the cable body 1. Then, the two arc-shaped clamping plates 542 on the left end of the mounting sleeve 42 are aligned with the two arc-shaped slots 51 on the docking sleeve 3. During the process of pushing to the left along the axial direction of the cable body 1, the mounting sleeve 42 will drive the arc-shaped clamping plates 542 to insert into the corresponding arc-shaped slots 51 through the support rod 541. When the arc-shaped clamping plates 542 contact the wedge-shaped end face of the arc-shaped baffle 53, the arc-shaped clamping plates 542 will move to the left and retract into the arc-shaped slots 51 to avoid contact with the arc-shaped baffle 53 until the end face of the mounting sleeve 42 is completely in contact with the end face of the docking sleeve 3. At this time, the arc-shaped clamping plates 542 will move to the position corresponding to the arc-shaped groove 52 on the same side. Then, the operator manually rotates the mounting sleeve 42 and the flexible hollow frame 43. The support rod 541 drives the arc-shaped clamping plate 542 to rotate synchronously until the two arc-shaped clamping plates 542 are inserted into the corresponding arc-shaped clamping slots 52, completing the engagement of the mounting sleeve 42 and the docking sleeve 3. After the two arc-shaped clamping plates 542 are inserted into the corresponding arc-shaped clamping slots 52, the arc-shaped baffle 53 will extend to the right and return to its original position under the action of the compression spring, thereby completing the axial locking and circumferential limiting of the mounting sleeve 42 and the docking sleeve 3, achieving a stable assembly effect between the main body of the bending protection part 4 and the male plug 2. The mounting sleeve 42, the flexible hollow frame 43 and the docking sleeve 3 are positioned and fixed in one step by plugging and engaging, without the need for additional fasteners. The assembly position accurately corresponds to the stress concentration area at the root of the joint. After connection, it has good anti-drag and anti-torsion performance, which can prevent the flexible hollow frame 43 from shifting and loosening during the subsequent arrangement of the bending protection group 45 and the laying of the cable body 1.

[0034] It is worth emphasizing that, since the end of the arc-shaped baffle 53 facing the arc-shaped slot 52 has a C-shaped groove structure, it not only avoids the support rod 541 when it is inserted into the arc-shaped slot 51, but also limits the support rod 541 and the arc-shaped slot 542 in a circumferential manner when the arc-shaped slot 542 is inserted into the corresponding arc-shaped slot 52, thus preventing them from shifting their position.

[0035] During the installation phase of the bending protection assembly 45, after the installation sleeve 42 and the docking sleeve 3 have been assembled and fixed, the operator continues to move the preset number of buffer discs 1 451 and buffer disc 2 452 onto the outer wall of the cable body 1 in sequence, and slide them from right to left along the outer wall of the cable body 1, so that they slide into the flexible hollow skeleton 43. During the insertion process, the notches 453 on the inner walls of buffer disc 1 451 and buffer disc 2 452 need to be aligned with the positioning rubber strips 41 on the cable body 1 before being inserted. After buffer disc 1 451 and buffer disc 2 452 are inserted into the position of the target positioning rubber strip 41, the operator needs to manually rotate buffer disc 1 451 and buffer disc 2 452 in sequence to make the positioning rubber strip 41 embed into the receiving cavity 454 on the corresponding buffer disc 1 451 or buffer disc 2 452, thereby completing the circumferential positioning and axial limiting work of several sets of buffer disc 1 451 and buffer disc 2 452. It should be noted that the buffer disc 1 451 and buffer disc 2 452 are positioned relative to the positioning rubber strip 41. The buffer disks are mutually damped and have high friction. When the buffer disk 451 and the buffer disk 452 are rotated without external force, they will not easily deviate in position. In addition, the operator can also adjust the position of the internal buffer disks through the operating holes on the outer wall of the flexible hollow frame 43. Furthermore, it is necessary to ensure that all buffer disks 451 and the buffer disk 452 are evenly arranged in a left-right order. At this time, the opposite ends of the arc-shaped contact plates 455 on the buffer disks 451 and the buffer disk 452 will be flexibly fitted (a gap can be reserved). The embedded alignment magnets 456 will be magnetically connected to each other one by one, further stabilizing the relative positions of buffer disc 1 451 and buffer disc 2 452. The arrangement method of group-by-group set-in and positioning can flexibly adjust the number of buffer discs and the arrangement spacing according to the specifications of the cable body 1 and the risk of bending during laying. The cooperation between the positioning rubber strip 41 and the receiving cavity 454 can prevent the circumferential deflection of the buffer disc and ensure the precise alignment of the buffer surface when bending. At the same time, the set-in installation is simple to operate and can be flexibly adjusted on the power construction site.

[0036] After the bending protection assembly 45 is arranged and installed, the operator will then movably fit the closing sealing plate 44 onto the outer wall of the cable body 1 and slide it from right to left along the outer wall of the cable body 1, so that it moves closer to the right end of the flexible hollow skeleton 43, until the operator installs the closing sealing plate 44 at the installation position on the right end of the flexible hollow skeleton 43, thereby axially limiting the internal bending protection assembly 45 and completing the assembly and sealing of the entire bending protection part 4. The detachable closing sealing plate 44 achieves axial constraint on buffer plate one 451 and buffer plate two 452, which not only ensures that buffer plate one 451 and buffer plate two 452 will not move axially during operation, but also reserves a disassembly and assembly channel for subsequent maintenance and replacement.

[0037] During the installation phase of the cable body 1 via the male plug 2, the operator holds the male plug 2 and inserts it into the matching female plug to complete the electrical connection and structural connection of the cable body 1. After the connection is completed, the bending protection part 4 is located in the rigid constraint area at the root of the cable body 1 and the male plug 2. In most scenarios, the cable body 1 will bear the downward load of its own weight caused by the laying of the cable. Through the core advantage of the plug-in cable for quick connection, the on-site construction time is greatly shortened. The bending protection part 4 can be placed synchronously with the male plug 2 without the need for additional protective components. Moreover, the protective structure does not interfere with the insertion and matching of the male plug 2 and the female plug, and does not affect the electrical contact performance and the sealing of the connection.

[0038] During the bending protection phase of cable body 1, when cable body 1 sags due to its own weight or bends during installation, the buffer disc 451 on the inner side of the bend will come closer to the end face of the arc-shaped contact plate 455 on the buffer disc 452. During this process, the arc-shaped contact plate 455 on the medium-hardness buffer disc 452 will elastically contact the opposite end face of the buffer disc 451, generating a controllable compression to achieve bending buffering. As the bending angle of cable body 1 increases, the high-hardness buffer disc 451 acts as a rigid stop point, forming a rigid stop with the buffer disc 452, forcibly preventing the bending angle from increasing further and limiting the curvature at this location within the allowable range of cable body 1. Meanwhile, the conical plate structure on the right side of buffer disc 2 452 can disperse the bending deformation concentrated at the edge of buffer disc 2 452 to a longer conical section. The alignment magnet 456, together with the positioning rubber strip 41, can always maintain the alignment accuracy of buffer disc 1 451 and buffer disc 2 452, and limit the circumferential deflection of buffer disc 1 451 and buffer disc 2 452. Through the graded protection structure of high-hardness buffer disc 1 451 limiting and medium-hardness buffer disc 2 452 buffering, it can not only avoid the cable body 1 from excessive bending leading to insulation layer damage and conductor fatigue fracture, but also disperse stress through the conical transition structure, solving the problem that the root of the traditional limiting structure is prone to damage. The structure is simple and highly reliable, and can be adapted to complex outdoor working conditions for a long time.

[0039] During the disassembly and maintenance of the bending protection part 4, when it is necessary to inspect and maintain the bending protection part 4 that has been in long-term use, the operator removes the closing sealing plate 44 and separates it from the cable body 1. Then, the operator rotates several sets of buffer discs 1 451 and buffer disc 2 452 in the flexible hollow frame 43 in sequence. During this process, the alignment magnets 456 on the buffer disc 1 451 and the arc-shaped contact plate 455 will rotate synchronously and stagger, releasing the magnetic connection effect. After the notch 453 on the buffer disc 1 451 and buffer disc 2 452 are aligned with the positioning rubber strip 41 again, the operator removes them along the right side of the cable body 1 to complete the removal and replacement of the buffer disc 1 451 and buffer disc 2 452.

[0040] After the bending protection assembly 45 is removed, the operator uses a tool (or manually presses) to simultaneously press the two arc-shaped baffles 53, with the right end away from the arc-shaped retaining plate 542, causing it to move to the left and retract into the corresponding arc-shaped slot 51. At this time, the circumferential limiting effect of the arc-shaped baffles 53 on the arc-shaped slots 52 is released. Then, the operator rotates the flexible hollow frame 43 and the mounting sleeve 42 in the opposite direction. The mounting sleeve 42 will drive the arc-shaped retaining plates 542 to rotate synchronously through the support rod 541 until the two arc-shaped retaining plates 542 respectively exit their corresponding arc-shaped slots 52. During the process of the arc-shaped retaining plates 542 exiting, the left end face of the arc-shaped retaining plate 542 will abut against the corresponding arc-shaped baffle. On the wedge-shaped surface at the right end of plate 53, the compression spring of the arc-shaped baffle 53 is pushed aside, eliminating the need for the operator to hold the tool to press the arc-shaped baffle 53. After the arc-shaped clamping plate 542 completely exits the corresponding arc-shaped clamping groove 52 and moves into the arc-shaped slot 51, the operator can then pull the mounting sleeve 42 and the flexible hollow skeleton 43 to the right to remove the mounting sleeve 42 and the flexible hollow skeleton 43 from the right end of the cable body 1. The disassembly process of the bending protection part 4 corresponds to the reverse of the assembly process, making the operation convenient. The entire disassembly can be completed with the help of simple tools (or manual pressing), which facilitates the targeted replacement of aging or damaged parts without scrapping the entire cable body 1. This results in low maintenance costs and strong adaptability.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A plug-in insulated power cable for power construction, characterized in that, include: The cable body (1) has a male plug (2) installed on the left end of the cable body (1). The right end of the male plug (2) is a conical structure, and a mating sleeve (3) is fixedly sleeved on the outer wall of the right end of the male plug (2) at the left end of the conical structure. The cable body (1) and the male plug (2) are jointly provided with a bending protection part (4), and the mating sleeve (3) and the bending protection part (4) are jointly provided with a mating installation part (5). The bending protection part (4) includes a positioning rubber strip (41) that is symmetrically fixedly sleeved on the outer wall of the end of the cable body (1) near the male plug (2). The tapered structure on the right end of the male plug (2) and the outer wall of the cable body (1) are movably sleeved together with an installation sleeve (42). A flexible hollow skeleton (43) is installed on the right end of the installation sleeve (42) and sleeved on the outside of the cable body (1). A closing sealing plate (44) is detachably installed on the inner wall of the right end of the flexible hollow skeleton (43). The closing sealing plate (44) is movably sleeved on the outer wall of the cable body (1). A bending protection group (45) is provided on the bending protection part (4) corresponding to the positioning rubber strip (41).

2. The plug-in insulated power cable for power construction according to claim 1, characterized in that: The positioning rubber strip (41) is fixedly sleeved with several sets. The several sets of positioning rubber strips (41) are linearly and uniformly distributed along the extension direction of the cable body (1). Each set of positioning rubber strips (41) is composed of two adjacent positioning rubber strips (41). The positioning rubber strip (41) is an arc-shaped strip structure with rounded corners on the outer wall. The flexible hollow skeleton (43) has several operating holes that are evenly distributed around the circumference on the outer wall.

3. The plug-in insulated power cable for power construction according to claim 1, characterized in that: The mating installation part (5) includes an arc-shaped slot (51) located at the right end of the mating sleeve (3) corresponding to the installation sleeve (42). There are two arc-shaped slots (51), which are evenly distributed around the circumference. An arc-shaped groove (52) is also provided in the middle of the inner wall of the arc-shaped slot (51), which is also evenly distributed around the circumference.

4. A plug-in insulated power cable for power construction according to claim 3, characterized in that: The mounting part (5) further includes an arc-shaped baffle (53) that is slidably mounted on the inner wall of the left end of the arc-shaped slot (51) by a compression spring. The end of the arc-shaped baffle (53) near the mounting sleeve (42) is a wedge-shaped structure, and the end of the arc-shaped baffle (53) facing the arc-shaped slot (52) is a C-shaped groove structure. The arc-shaped slot (51) is located on the inner wall of the left side of the arc-shaped slot (52). A C-shaped protruding structure is integrally installed on the C-shaped groove structure corresponding to the arc-shaped baffle (53). A locking assembly (54) is provided on the mounting sleeve (42) corresponding to the arc-shaped slot (52).

5. A plug-in insulated power cable for power construction according to claim 2, characterized in that: The bending protection group (45) includes a buffer plate one (451) and a buffer plate two (452) located inside the flexible hollow frame (43). There are several sets of buffer plates one (451) and buffer plates two (452). The several sets of buffer plates one (451) and buffer plates two (452) are also linearly and uniformly distributed along the extension direction of the cable body (1). Buffer plate one (451) is located to the left of buffer plate two (452). The outer walls of buffer plate one (451) and buffer plate two (452) are movably attached to the inner wall of the flexible hollow frame (43). The inner walls of buffer plate one (451) and buffer plate two (452) are movably sleeved on the outer wall of the cable body (1).

6. A plug-in insulated power cable for power construction according to claim 5, characterized in that: The buffer disk one (451) is located to the left of the buffer disk two (452). The buffer disk one (451) is made of high hardness material, and the buffer disk two (452) is made of medium hardness material. The buffer disk one (451) is a ring structure, and the buffer disk two (452) is composed of a ring plate and a conical plate located to its right.

7. A plug-in insulated power cable for power construction according to claim 6, characterized in that: The bending protection assembly (45) also includes notches (453) on the inner walls of buffer plate one (451) and buffer plate two (452). The notches (453) are arc-shaped and there are two notches (453). The two notches (453) are evenly distributed in a circle and are staggered with the corresponding two positioning rubber strips (41). The inner walls of buffer plate one (451) and buffer plate two (452) are provided with accommodating cavities (454) for the corresponding positioning rubber strips (41). The accommodating cavities (454) are U-shaped and the outer walls of the positioning rubber strips (41) are movably attached to the inner walls of the corresponding accommodating cavities (454).

8. A plug-in insulated power cable for power construction according to claim 7, characterized in that: The bending protection assembly (45) also includes two positioning rubber strips (41) located at the end of the buffer plate two (452) facing the buffer plate one (451), and an arc-shaped contact plate (455) is integrally installed. The end of the arc-shaped contact plate (455) facing the buffer plate one (451) is embedded with a positioning magnet (456). The end of the buffer plate one (451) facing the buffer plate two (452) is also embedded with a positioning magnet (456) corresponding to the two arc-shaped contact plates (455). The outer walls of the buffer plate one (451), the buffer plate two (452) and the arc-shaped contact plate (455) are all rounded.

9. A plug-in insulated power cable for power construction according to claim 4, characterized in that: The locking assembly (54) includes a support rod (541) installed at the end of the mounting sleeve (42) facing the docking sleeve (3). There are two support rods (541), which are evenly distributed in a circle. An arc-shaped locking plate (542) is installed at the end of the support rod (541) away from the mounting sleeve (42). The arc-shaped locking plate (542) has an arc structure, and the outer wall of the arc-shaped locking plate (542) is movably attached to the inner wall of the corresponding arc-shaped locking groove (52).

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