Quickly stable butt joint cable protection pipe

Abstract

The application relates to the technical field of power cable protection, and discloses a cable protection pipe capable of being quickly and stably docked, which comprises a docking structure and cable pipes at two ends; the docking structure is composed of detachable first and second connecting pieces; the first connecting piece is connected with the cable pipe through a rotating connecting piece and can freely rotate; by rotating the first connecting piece, a first lock tongue on the first connecting piece and a second lock tongue on the second connecting piece can be slid into or out of corresponding clamping part grooves, axial quick locking or unlocking is realized; in order to enhance stability, a linkage expansion and contraction mechanism is arranged inside, the locking head can be automatically driven to radially extend when axial locking is performed, and is locked by an external circumferential restraining piece, so that secondary locking for preventing accidental rotation is formed; through single rotating operation, stable installation and convenient dismounting of the connecting head can be completed, the structure is greatly simplified, the number of parts is obviously reduced, manufacturing cost and maintenance difficulty are reduced, and engineering application popularization is facilitated.

Description

Technical Field

[0001] This invention relates to the field of power cable protection technology, and more specifically to a cable protection pipe that can be quickly and stably connected. Background Technology

[0002] In cable laying projects, rigid polyvinyl chloride (PVC) pipes are usually selected for cable protection. Traditional PVC pipe connection methods mainly use sealing rings or adhesives. Using sealing rings, adhesives, or even hot-melt welding methods requires permanently or semi-permanently bonding two sections of PVC pipe together, making it difficult to disassemble and recycle the connected pipes, which brings inconvenience to project maintenance, renovation, or material reuse.

[0003] To improve engineering convenience, detachable connector solutions have emerged in the prior art. For example, Chinese patent document CN118676820B discloses a connector structure for PVC power cable protection pipes. This structure includes a central structure and side mechanisms symmetrically arranged on both sides. Through the cooperation of a series of transmission and locking components such as internal gears, driven gears, lead screws, and moving rings, users can drive the power pipes on both sides to connect and fix to the connecting pipe by rotating the rotating wheel, and disassemble by subsequent operations such as moving the linkage ring and inserting the fixing rod. This design aims to simplify the operation of pipe connection and disconnection.

[0004] However, such improved connector structures still have significant shortcomings. Their internal transmission and locking system, consisting of gears, lead screws, multiple ring-shaped components, and connecting rods, results in a complex overall structure with numerous parts. This not only requires multiple steps to complete the connection or disassembly, limiting the improvement in convenience, but also significantly increases the manufacturing cost and subsequent maintenance difficulty of the connector due to the complex component design, which is not conducive to the large-scale promotion and application of this technology in engineering practice. Summary of the Invention

[0005] To address the shortcomings of existing detachable connectors, such as complex structures, numerous operating steps, and high manufacturing costs, a cable protection pipe docking structure with a simplified structure, quick locking and disassembly capabilities, and lower costs is provided.

[0006] The present invention provides the following technical solution: a cable protection pipe that can be quickly and stably connected, comprising a connection structure and cable pipes arranged at both ends of the connection structure and extending axially; the connection structure includes a first connector and a second connector that can be detachably installed, the first connector being connected to the corresponding side of the cable pipe through a rotating connector, so that the first connector can rotate freely relative to the cable pipe, while the second connector is fixedly connected to the corresponding side of the cable pipe.

[0007] The first connector includes a first connecting tube, a first engaging portion symmetrically fixed to the side wall of the first connecting tube, and a first locking tongue fixed above one of the first engaging portions and extending circumferentially along the docking port of the first connecting tube; the second connector includes a second connecting tube, a second engaging portion symmetrically fixed to the side wall of the second connecting tube, and a second locking tongue fixed below one of the second engaging portions and extending circumferentially along the docking port of the second connecting tube; wherein, both the first engaging portion and the second engaging portion extend inwardly to form grooves beyond their respective docking ports, and the grooves are respectively used for corresponding coupling with the second locking tongue and the first locking tongue; when the docking ports of the first connecting tube and the second connecting tube are aligned and fitted, by rotating the first connecting tube, the second locking tongue and the first locking tongue can be correspondingly inserted into or disengaged from the corresponding grooves, thereby realizing the locking or unlocking of the entire docking structure.

[0008] Furthermore, the first engaging portion and the second engaging portion are arranged in a spatially perpendicular relationship.

[0009] Furthermore, the first latch and the second latch are located in the angled area between the first engaging part and the second engaging part and extend in opposite directions, and the farthest ends of the first latch and the second latch must not obstruct the relative movement between the second engaging part and the first engaging part; when the first connecting tube and the second connecting tube are aligned and fitted, the second latch and the first latch fall into the fitting trajectory of their respective corresponding grooves.

[0010] Furthermore, the docking structure also includes a linkage expansion and contraction mechanism disposed inside the first and second connecting members; the linkage expansion and contraction mechanism includes a drive disk fixed inside the first connecting pipe and an expansion and contraction part disposed inside the second connecting pipe, and the drive disk and the expansion and contraction part can be connected; the expansion and contraction end of the expansion and contraction part can pass through a pre-set constraint through hole in the side wall of the second connecting pipe under the rotation drive of the drive disk; the docking structure is also provided with a circumferential constraint member for constraining the circumferential rotation of the expansion and contraction end.

[0011] Furthermore, the retractable part includes a fixed plate fixed inside the second connecting pipe and telescopic components distributed circumferentially on the outer wall of the fixed plate; wherein, the telescopic components include a positioning tube fixed to the side wall of the fixed plate and extending radially, a locking block slidably sleeved inside the positioning tube, and a transmission rod fixed to the side wall of the locking block and extending axially in the direction of the driving plate; the side wall of the positioning tube is provided with a through groove for the transmission rod to slide radially.

[0012] Furthermore, the surface of the drive plate is provided with multiple guide grooves that radiate outward from the inside in a counterclockwise circumferential direction, and the surface of the fixed plate is provided with radially extending translational grooves that correspond one-to-one with the guide grooves; the transmission rod can be precisely aligned with the channel formed when it is aligned with the inner end of the guide groove and the translational groove, thus completing the initial configuration of the power connection; both the drive plate and the fixed plate have a through-hole for the cable to pass through.

[0013] Furthermore, a first limiting block is fixed on the side wall of the first connecting pipe near the docking port, located above the first locking tongue, and the gap between the first limiting block and the first locking tongue is just enough for the second engaging part to be inserted; similarly, a second limiting block is fixed on the side wall of the second connecting pipe near the docking port, located below the second locking tongue, and the gap between the second limiting block and the second locking tongue is just enough for the first engaging part to be inserted.

[0014] Furthermore, the circumferential constraint includes an adjusting nut threaded onto the surface of the second connecting pipe. The adjusting nut can rotate and move along the threaded area of ​​the side wall of the second connecting pipe outside the constraint through hole. A protective cover is rotatably provided on the inner side of the adjusting nut, which can cover the docking port of the second connecting pipe and the first connecting pipe. The protective cover consists of a central visible cylinder and conical cylinders fixed on both sides. The side wall of the conical cylinder end connected to the adjusting nut has a constraint through hole that can be aligned with the constraint through hole, while the other side of the conical cylinder end is axially slidingly engaged with an axial slide rail preset on the side wall of the first connecting pipe.

[0015] Furthermore, the tapered cylinder on the side away from the adjusting nut is axially detachable and installed on the side wall of the visible cylinder.

[0016] Furthermore, the locking block includes a sliding seat slidably fitted inside the positioning tube, a spring disposed inside the sliding seat, and a lock head that can extend and retract along the sliding seat under the action of the spring force; along the moving direction of the protective cover, the lock head has two wedge-shaped inclined surfaces, and the other two surfaces perpendicular to it are vertical parallel planes.

[0017] The technical effects and advantages of this invention are as follows:

[0018] This invention provides a cable protection pipe connection solution with a significantly simplified structure, quick operation, and low cost. Its core lies in the ability to drive the docking structure to quickly lock or unlock axially through a simple rotation operation, greatly improving the convenience of pipe connection. Furthermore, the innovative linkage expansion and contraction mechanism, in conjunction with the circumferential constraint component, can trigger and complete a secondary circumferential lock while simultaneously locking axially, effectively preventing accidental rotational unlocking due to accidental contact or external force, ensuring a stable and reliable connection. The overall design significantly reduces the number of parts, simplifies the assembly process, and significantly lowers manufacturing costs and maintenance difficulty, facilitating large-scale application in engineering practice. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention.

[0020] Figure 2 This is a schematic diagram of the structure after the first connector is attached to the second connector in Embodiment 1 of the present invention.

[0021] Figure 3This is a schematic diagram of the structure of the first connector in Embodiment 1 of the present invention, which is locked by rotating a certain angle after being attached to the second connector.

[0022] Figure 4 This is a schematic diagram of the overall structure of Embodiment 2 of the present invention.

[0023] Figure 5 This is a schematic diagram of the overall structure and partial cross-section of Embodiment 2 of the present invention.

[0024] Figure 6 This is a schematic diagram of the structure of the first connector, the second connector, and the circumferential constraint when the docking structure is in a separated state in Embodiment 2 of the present invention.

[0025] Figure 7 This is a schematic diagram of the first connecting member structure in Embodiment 2 of the present invention.

[0026] Figure 8 This is a schematic diagram of the second connector structure in Embodiment 2 of the present invention.

[0027] Figure 9 This is a schematic diagram of the structure of the first connector, the second connector, and the circumferential constraint when the docking structure is in a tight fit state in Embodiment 2 of the present invention.

[0028] Figure 10 This is a schematic diagram of the structure of the first connector, the second connector, and the circumferential constraint when the docking structure is in the adjustment state in Embodiment 2 of the present invention.

[0029] Figure 11 This is a schematic diagram of the structure of the first connector, the second connector, and the circumferential constraint when the docking structure is in a locked state in Embodiment 2 of the present invention.

[0030] Figure 12 For the present invention Figure 11 Schematic diagram of the structure at point A in the middle.

[0031] The reference numerals in the attached drawings are as follows: 1. First connecting member; 11. First connecting pipe; 111. Axial slide rail; 112. First mounting part; 12. First engaging part; 13. First locking tongue; 14. Drive disc; 141. Guide slide groove; 15. First limiting block; 2. Second connecting member; 21. Second connecting pipe; 211. Constraint through hole; 212. Second mounting part; 22. Second engaging part; 23. Second locking tongue; 24. Expanding part; 241. Fixing part. 2411. Fixed plate; 242. Translation slide; 242. Telescopic component; 2421. Positioning tube; 2422. Transmission rod; 2423. Locking block; 24231. Sliding seat; 24232. Lock head; 24233. Spring; 25. Second limit block; 3. Cable conduit; 4. Rotating connector; 41. First connecting ring; 42. Second connecting ring; 5. Circumferential constraint component; 51. Protective cover; 511. Constraint through hole; 52. Adjusting nut. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The cable protection pipe that can be quickly and stably connected according to the present invention is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1, refer to Figures 1 to 3 As shown, the present invention provides a cable protection pipe that can be quickly and stably connected, including a connection structure and cable pipes 3 arranged at both ends of the connection structure and extending axially; the connection structure includes a first connector 1 and a second connector 2 that can be detachably installed; wherein, the first connector 1 is connected to the corresponding side of the cable pipe 3 through a rotating connector 4, so that the first connector 1 can rotate freely relative to the cable pipe 3, while the second connector 2 is fixedly connected to the corresponding side of the cable pipe 3.

[0034] The first connector 1 includes a first connecting tube 11, a first engaging portion 12 symmetrically fixed to the side wall of the first connecting tube 11, and a first locking tongue 13 fixed above one of the first engaging portions 12 and extending circumferentially along the docking port of the first connecting tube 11; the second connector 2 includes a second connecting tube 21, a second engaging portion 22 symmetrically fixed to the side wall of the second connecting tube 21, and a second locking tongue 23 fixed below one of the second engaging portions 22 and extending circumferentially along the docking port of the second connecting tube 21; wherein, the first engaging portion 12 and the second engaging portion 22 both extend inward to form grooves beyond their respective docking ports, and the grooves are respectively used to couple with the second locking tongue 23 and the first locking tongue 13; when the docking ports of the first connecting tube 11 and the second connecting tube 21 are aligned and fitted, by rotating the first connecting tube 11, the second locking tongue 23 can be inserted into or disengaged from the corresponding grooves, thereby realizing the locking or unlocking of the entire docking structure;

[0035] In this embodiment, it should be specifically noted that the first engaging part 12 and the second engaging part 22 are arranged in a spatially perpendicular relationship, wherein the first engaging part 12 is horizontally and symmetrically fixed to the side wall of the first connecting pipe 11, and the second engaging part 22 is vertically and symmetrically fixed to the side wall of the second connecting pipe 21.

[0036] The first locking tongue 13 and the second locking tongue 23 are located in the angled area between the first engaging part 12 and the second engaging part 22 and extend in opposite directions. The farthest ends of the first locking tongue 13 and the second locking tongue 23 shall not obstruct the relative movement between the second engaging part 22 and the first engaging part 12. When the first connecting tube 11 and the second connecting tube 21 are aligned and fitted, the second locking tongue 23 and the first locking tongue 13 fall into the fitting trajectory of their respective corresponding grooves.

[0037] The ends of the second latch 23 and the first latch 13 are both wedge-shaped; the outer contours of the second latch 23 and the first latch 13 are both arc-shaped, and the curvature of the inner wall of the groove of the first engaging part 12 and the second engaging part 22 respectively matches the arc-shaped contour of the corresponding second latch 23 and the first latch 13; so as to facilitate the second latch 23 and the first latch 13 to slide into or out of the groove of the first engaging part 12 and the second engaging part 22 respectively when rotating and adjusting the first connecting tube 11;

[0038] The end of the first connecting pipe 11 that is far from the first engaging part 12 forms a tapered pipe with a gradually decreasing inner diameter, while the other end, which is integrally injection molded with it, is a straight pipe with a constant inner diameter. The end of the straight pipe forms a docking port. A sealing gasket is provided at the docking port. The straight pipe of the first connecting pipe 11 can be configured as a telescopic sleeve structure (not shown in the figure), which allows the first connecting pipe 11 to be pulled toward the second connecting pipe 21 without moving the cable pipe 3 connected to it, so as to complete the subsequent locking task of the docking structure.

[0039] The rotating connector 4 includes a first connecting ring 41 fixed to the tapered end of the first connecting tube 11 and a second connecting ring 42 rotatably engaged with the other end of the first connecting ring 41, wherein the second connecting ring 42 is fixedly connected to the cable tube 3; the rotating connector 4 may also adopt other serial connection structures that can achieve the same function, the purpose of which is to rotatably install the first connector 1 at the end of the cable tube 3 so that it can rotate freely relative to the cable tube 3, so that after being aligned and fitted with the second connector 2, the locking or unlocking action can be completed by rotation adjustment.

[0040] In Example 2, based on Example 1, when the docking ports of the first connecting pipe 11 and the second connecting pipe 21 are aligned and fitted, rotating the first connecting pipe 11 allows the second locking tongue 23 to engage or disengage from the corresponding groove, thus locking or unlocking the docking structure. However, this locking only restricts axial displacement and lacks effective restriction on circumferential rotation. Under misoperation or external force, the first connecting pipe 11 is prone to rotation, leading to accidental unlocking and affecting the reliability of the connection. Therefore, further optimization of the docking structure is required. The specific solution is as follows (refer to...). Figures 4 to 12As shown, the docking structure also includes a linkage expansion and contraction mechanism disposed inside the first connector 1 and the second connector 2; the linkage expansion and contraction mechanism includes a drive disk 14 fixed inside the first connecting pipe 11 and an expansion and contraction section 24 disposed inside the second connecting pipe 21, and a connection can be established between the drive disk 14 and the expansion and contraction section 24; the expansion and contraction end of the expansion and contraction section 24 can pass through a pre-set constraint through hole 211 on the side wall of the second connecting pipe 21 under the rotation drive of the drive disk 14; a circumferential constraint member 5 is also provided on the periphery of the docking structure for constraining the circumferential rotation of the expansion and contraction end;

[0041] Specifically, when the docking ports of the first connecting pipe 11 and the second connecting pipe 21 are aligned and fitted, while rotating the first connecting pipe 11 to make the second locking tongue 23 and the first locking tongue 13 embed into the corresponding groove to achieve axial locking (initial locking), the drive disk 14 rotates coaxially and drives the expansion and contraction section 24 to expand radially; when it expands to the limit position, the expansion and contraction end passes through the constraint through hole 211 and is locked by the circumferential constraint member 5, thereby achieving the constraint of the circumferential rotation of the docking structure;

[0042] The expansion section 24 includes a fixed disk 241 fixed inside the second connecting pipe 21 and a telescopic assembly 242 circumferentially distributed on the outer wall of the fixed disk 241. The telescopic assembly 242 includes a positioning tube 2421 fixed to the side wall of the fixed disk 241 and extending radially, a locking block 2423 slidably sleeved inside the positioning tube 2421, and a transmission rod 2422 fixed to the side wall of the locking block 2423 and extending axially in the direction of the drive disk 14. The side wall of the positioning tube 2421 is provided with a through groove for the transmission rod 2422 to slide radially. The transmission rod 2422 and the locking block 2423 together constitute the expansion end of the expansion section 24. The transmission rod 2422 establishes a power connection with the drive disk 14 and can drive the locking block 2423 to move radially until it passes through the constraint through hole 211 and is locked by the circumferential constraint member 5, thereby completing the constraint on the circumferential rotation of the docking structure, that is, realizing secondary locking.

[0043] The surface of the drive disk 14 has multiple guide grooves 141 that radiate outwards in a counterclockwise circumferential direction (see reference). Figure 6 or Figure 10 (From the perspective shown) The surface of the fixed disk 241 is provided with radially extending translational slides 2411 that correspond one-to-one with the guide slides 141; the transmission rod 2422 can be precisely aligned with the channel formed when it is aligned with the inner end of the guide slides 141 and the translational slides 2411, thus completing the initial configuration of the power connection; the center of both the drive disk 14 and the fixed disk 241 is provided with a through-hole for the cable to pass through;

[0044] When the first connecting member 1 approaches the second connecting member 2, the transmission rod 2422 can be inserted into the channel formed by the inner end of the guide groove 141 and the translation groove 2411, completing the initial configuration of the power connection. By rotating the first connecting tube 11 in a predetermined direction, the second locking tongue 23 and the first locking tongue 13 are embedded in the corresponding groove to achieve axial locking. At the same time, the drive disc 14 rotates coaxially with the first connecting tube 11, and drives the transmission rod 2422 to slide radially from the inside to the outside along the translation groove 2411 under the guidance of the guide groove 141, so that the locking block 2423 connected to it partially protrudes out of the constraint through hole 211. Then, the circumferential constraint member 5 locks the protruding part, completing the constraint on the rotation direction of the first connecting member 1.

[0045] Furthermore, after the transmission rod 2422 passes through the translation slide 2411, it can further pass through the guide slide 141. To ensure that the guide slide 141 and the inner end of the translation slide 2411 near the opening are accurately aligned when the first connecting pipe 11 is axially pulled closer to the second connecting pipe 21, thereby ensuring that the transmission rod 2422 passes smoothly through the guide slide 141, a docking limiting structure is provided on the first connecting pipe 11 and the second connecting pipe 21 respectively: Specifically, a first limiting block 15 located above the first locking tongue 13 is fixed on the side wall of the first connecting pipe 11 near the docking port. The gap between the first locking tongue 13 and the second locking part 22 is just enough for the second locking part 22 to be inserted; similarly, a second limiting block 25 located below the second locking tongue 23 is fixed on the side wall of the second connecting pipe 21 near the docking port, and the gap between the second limiting block 25 and the second locking tongue 23 is just enough for the first locking part 12 to be inserted; this structure effectively constrains the initial angle when the first connecting pipe 11 and the second connecting pipe 21 are docked, and avoids the misalignment of the guide slide 141 and the translation slide 2411 due to the angle deflection of the first connecting pipe 11, which would prevent the transmission rod 2422 from passing through smoothly and affect subsequent operations;

[0046] The number of transmission rods 2422 can be set according to actual needs. Since the telescopic components 242 are arranged in a circumferential ring array, the locking block 2423 located below will naturally sag due to gravity when the transmission rods 2422 have not passed through the guide slide 141. Therefore, the length of the transmission rods 2422 must at least exceed the docking port of the second connecting pipe 21, so that before the first connecting piece 1 and the second connecting piece 2 are docked, the corresponding transmission rods 2422 can be manually adjusted in advance to ensure that they are precisely aligned with the channel formed by the guide slide 141 and the inner end of the translation slide 2411. Position; thus, it passes through the guide groove 141 to complete the initial configuration of the power connection; (Note: If the telescopic component 242 is not considered to be arranged in the lower semi-circular area of ​​the fixed plate 241, the length requirement of the transmission rod 2422 can be reduced, thereby eliminating the step of moving the misaligned transmission rod 2422; at this time, the length setting of the transmission rod 2422 must at least meet the requirement that when the first connecting member 1 and the second connecting member 2 are in contact, the transmission rod 2422 located at the inner end of the translation groove 2411 can pass through the inner end of the corresponding guide groove 141 to complete the power connection).

[0047] In this embodiment, it should be specifically noted that, in order to ensure that the locking block 2423 can be reliably locked by the circumferential constraint member 5 after moving radially with the transmission rod 2422 and passing through the constraint through hole 211, thereby constraining the rotation direction of the first connecting member 1 to achieve a more stable double locking effect; on the other hand, to facilitate the adjustment of the initial position of the transmission rod 2422 before the first connecting member 1 and the second connecting member 2 are docked to complete the initial configuration of the power connection between it and the guide slide 141, the structure of the circumferential constraint member 5 needs to be optimized as follows;

[0048] The circumferential constraint member 5 includes an adjusting nut 52 threaded onto the surface of the second connecting pipe 21. The adjusting nut 52 can rotate and move along the threaded area of ​​the side wall of the second connecting pipe 21 outside the constraint through hole 211. A protective cover 51 is rotatably provided on the inner side of the adjusting nut 52, which can cover the docking port of the second connecting pipe 21 and the first connecting pipe 11. The protective cover 51 is composed of a central visible cylinder and conical cylinders fixed on both sides. The side wall of the conical cylinder end connected to the adjusting nut 52 has a constraint through hole 511 that can be aligned with the constraint through hole 211, while the other side of the conical cylinder end is axially slidably fitted with an axial slide rail 111 pre-set on the side wall of the first connecting pipe 11. To avoid interfering with the axial displacement of the first connecting pipe 11 towards the second connecting pipe 21; when the first connecting pipe 11 is rotated so that the second locking tongue 23 and the first locking tongue 13 are embedded in the corresponding groove to achieve axial locking, the protective cover 51 rotates coaxially with the first connecting pipe 11 under the constraint of the axial slide rail 111 until the locking block 2423 extends out of the constraint through hole 211 to the limit position under the drive of the drive disc 14. At this time, the constraint through hole 511 is exactly on the same axial plane as the constraint through hole 211; by further rotating and moving the adjusting nut 52 to move it forward, the constraint through hole 511 and the locking block 2423 extending out of the constraint through hole 211 can achieve elastic retraction locking;

[0049] Furthermore, the tapered cylinder on the side away from the adjusting nut 52 is axially detachable and installed on the side wall of the visible cylinder, preferably by a plug-in connection; after the tapered cylinder on this side is axially removed along the axial slide rail 111, the adjusting nut 52 can be rotated outward to allow the remaining part of the protective cover 51 to be effectively disengaged from the docking port of the second connecting pipe 21, thereby facilitating the initial position adjustment of the transmission rod 2422 to complete the initial configuration of the power connection between it and the guide slide 141;

[0050] To achieve elastic retraction locking between the constraint through hole 511 and the locking block 2423 extending from the constraint through hole 211, the structure of the locking block 2423 needs further optimization: the locking block 2423 includes a sliding seat 24231 slidably sleeved in the positioning tube 2421, a spring 24233 disposed in the sliding seat 24231, and a lock head 24232 that can extend and retract along the sliding seat 24231 under the elastic force of the spring 24233; along the moving direction of the protective cover 51, the lock head 24232 has two wedge-shaped inclined surfaces, and the other two surfaces perpendicular to it are vertical parallel planes; when the locking block 2423 extends out of the constraint through hole 211 and is in the same axial position as the constraint through hole 511, the adjusting nut 52 is rotated through the threaded area. The protective cover 51 is moved forward, causing the conical end of the constraint through hole 511 to abut against and press the lock head 24232, forcing the lock head 24232 to compress the spring 24233 and retract into the sliding seat 24231, thereby avoiding interference with the axial movement of the protective cover 51; when the constraint through hole 511 is completely aligned with the constraint through hole 211, the lock head 24232 extends outward again under the elastic restoring force of the spring 24233, and at the same time penetrates the constraint through hole 211 and the constraint through hole 511, thereby locking the rotation direction of the protective cover 51; through the linkage expansion and contraction mechanism, a constraint is formed on the circumferential rotation of the first connecting member 1, that is, the secondary locking of the docking structure is completed; by operating in the opposite direction to the above locking operation, the disassembly of the docking structure can be completed;

[0051] In addition, the drive plate 14 is detachably mounted on the first mounting portion 112 on the inner wall of the first connecting pipe 11 by screws; the fixed plate 241 is detachably mounted on the second mounting portion 212 on the inner wall of the second connecting pipe 21 by screws, and the arrangement of the first mounting portion 112 and the second mounting portion 212 does not interfere with the radial movement of the transmission rod 2422.

[0052] The above is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, in accordance with the technical plan and its improved concept, should be included under the protection of the present invention.

Claims

1. A cable protection conduit capable of rapid and stable connection, comprising a connection structure and cable conduits arranged at both ends of the connection structure and extending axially; the connection structure includes a detachable first connector and a second connector, characterized in that: The first connector is connected to the corresponding cable conduit via a rotating connector, allowing the first connector to rotate freely relative to the cable conduit, while the second connector is fixedly connected to the corresponding cable conduit. The first connector includes a first connecting tube, a first engaging portion symmetrically fixed to the side wall of the first connecting tube, and a first locking tongue fixed above one of the first engaging portions and extending circumferentially along the docking port of the first connecting tube; the second connector includes a second connecting tube, a second engaging portion symmetrically fixed to the side wall of the second connecting tube, and a second locking tongue fixed below one of the second engaging portions and extending circumferentially along the docking port of the second connecting tube; wherein, both the first engaging portion and the second engaging portion extend inwardly to form grooves beyond their respective docking ports, and the grooves are respectively used for corresponding coupling with the second locking tongue and the first locking tongue; when the docking ports of the first connecting tube and the second connecting tube are aligned and fitted, by rotating the first connecting tube, the second locking tongue and the first locking tongue can be correspondingly inserted into or disengaged from the corresponding grooves, thereby realizing the locking or unlocking of the entire docking structure; The docking structure also includes a linkage expansion and contraction mechanism disposed inside the first connector and the second connector; the linkage expansion and contraction mechanism includes a drive disk fixed inside the first connector and an expansion and contraction part disposed inside the second connector, and the drive disk and the expansion and contraction part can be connected; the expansion and contraction end of the expansion and contraction part can pass through a pre-set constraint through hole in the side wall of the second connector under the rotation drive of the drive disk; the docking structure is also provided with a circumferential constraint member for constraining the circumferential rotation of the expansion and contraction end. The expansion and contraction section includes a fixed plate fixed inside the second connecting pipe and telescopic components distributed circumferentially on the outer wall of the fixed plate; wherein, the telescopic components include a positioning tube fixed to the side wall of the fixed plate and extending radially, a locking block slidably sleeved inside the positioning tube, and a transmission rod fixed to the side wall of the locking block and extending axially in the direction of the drive plate; the side wall of the positioning tube is provided with a through groove for the transmission rod to slide radially. The surface of the drive plate is provided with multiple guide grooves that radiate outward from the inside in a counterclockwise circumferential direction, and the surface of the fixed plate is provided with radially extending translation grooves that correspond one-to-one with the guide grooves; the transmission rod can be precisely aligned with the channel formed when it is aligned with the inner end of the guide groove and the translation groove, thus completing the initial configuration of the power connection. The circumferential constraint includes an adjusting nut threaded onto the surface of the second connecting pipe. The adjusting nut can rotate and move along the threaded area of ​​the side wall of the second connecting pipe outside the constraint through hole. A protective cover is rotatably provided on the inner side of the adjusting nut, which can cover the docking port of the second connecting pipe and the first connecting pipe. The protective cover consists of a central visible cylinder and conical cylinders fixed on both sides. The side wall of the conical cylinder end connected to the adjusting nut has a constraint through hole that can be aligned with the constraint through hole, while the other side of the conical cylinder end is axially slidingly engaged with an axial slide rail preset on the side wall of the first connecting pipe.

2. The cable protection pipe capable of rapid and stable connection according to claim 1, characterized in that: The first engaging part and the second engaging part are arranged perpendicular to each other in space.

3. The cable protection pipe capable of rapid and stable connection according to claim 2, characterized in that: The first latch and the second latch are located in the angled area between the first engagement part and the second engagement part and extend in opposite directions. The farthest ends of the first latch and the second latch must not obstruct the relative movement between the second engagement part and the first engagement part. When the first connecting tube and the second connecting tube are aligned and fitted, the second latch and the first latch fall into the fitting trajectory of their respective corresponding grooves.

4. The cable protection pipe capable of rapid and stable connection according to claim 1, characterized in that: Both the drive plate and the fixed plate have openings at their centers for cables to pass through.

5. The cable protection pipe capable of rapid and stable connection according to claim 1, characterized in that: A first limiting block is fixed on the side wall of the first connecting pipe near the docking port, located above the first locking tongue. The gap between the first limiting block and the first locking tongue is just enough for the second engaging part to be inserted. Similarly, a second limiting block is fixed on the side wall of the second connecting pipe near the docking port, located below the second locking tongue. The gap between the second limiting block and the second locking tongue is just enough for the first engaging part to be inserted.

6. The cable protection pipe capable of rapid and stable connection according to claim 1, characterized in that: The tapered cylinder on the side away from the adjusting nut is axially detachable and installed on the side wall of the visible cylinder.

7. The cable protection pipe capable of rapid and stable connection according to claim 1, characterized in that: The locking block includes a sliding seat that is slidably sleeved in the positioning tube, a spring disposed in the sliding seat, and a lock head that can extend and retract along the sliding seat under the action of the spring force; Along the direction of movement of the protective cover, the lock head has two wedge-shaped bevels, and two other surfaces perpendicular to them are vertical parallel planes.

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