Structurally reinforced protection tube set

Abstract

The application discloses a kind of structure reinforced protective tube groups, including the protective tube of built-in cable, the shell tube of being sleeved outside protective tube and the support assembly for fixing protective tube in shell tube;Support assembly includes two about shell tube symmetry and vertically arranged in the base pipe outside shell tube, two about shell tube symmetry setting support assembly and first elastic member;Support assembly includes two respectively slidingly inserted in the insertion rod of two base pipe one end, the first support rod of connecting two insertion rods, shell tube is provided with the through slot allowing first support rod to pass into shell tube, the movement of the insertion rod of two support assemblies along insertion base pipe direction is suitable to make two first support rod relative two sides of the outer wall of protective tube implement clamping, and first elastic member drives insertion rod along insertion corresponding base pipe movement.The beneficial effects of the application are that protective tube circumferential full-coating fixation can be realized without complicated operation.

Description

Technical Field

[0001] This invention relates to a structurally reinforced protective pipe assembly, belonging to the technical field of cable protection facilities. Background Technology

[0002] The existing CM cable protection pipe disclosed in CN214506419U adopts a split-type pressure-resistant structure. Its outer wall requires the sequential installation of a first and second sheath, with a top rod inserted between them. Finally, it is fixed by bolts through a connecting plate and tightening nuts. This structure has significant drawbacks: First, the assembly process is complex, requiring manual operation of multiple steps such as sheath alignment, top rod insertion, and bolt tightening, resulting in low construction efficiency and high labor intensity. Second, the first and second sheaths are designed as separate, spliced ​​units, failing to form a continuous, closed protective structure. This leaves uncovered, exposed areas where external forces can directly act, creating blind spots in protection and increasing the risk of pipe damage. Furthermore, the split structure relies on bolt tightening, which is prone to loosening over time, further weakening the protective effect and failing to meet durability requirements under complex working conditions. Summary of the Invention

[0003] The purpose of this invention is to provide a structurally reinforced protective tube assembly that can achieve circumferential full coverage and fixation of the protective tube without complicated operations.

[0004] The present invention is achieved through the following technical solution.

[0005] A reinforced protective tube assembly includes a protective tube with a built-in cable, an outer casing tube covering the protective tube, and a support assembly for fixing the protective tube inside the outer casing tube.

[0006] The support assembly includes two base tubes symmetrically arranged about the outer shell tube and perpendicularly disposed outside the outer shell tube, two support components symmetrically arranged about the outer shell tube, and a first elastic element; the support assembly includes two insert rods slidably inserted into one end of the two base tubes respectively, and a first support rod connecting the two insert rods. A through groove is provided on the outer shell tube to allow the first support rod to pass into the outer shell tube. The movement of the insert rods of the two support components along the direction of insertion into the base tube is suitable for clamping the two first support rods against the opposite sides of the outer wall of the protective tube. The first elastic element drives the insert rods to move along the corresponding base tubes.

[0007] As a further improvement of the present invention, the support assembly further includes two second support rods symmetrical about the two sides of the first support rod, and a second elastic member. The second support rods are rotatably connected to the first support rod, so that their distal ends away from the rotatable connection parts can slide circumferentially along the outer wall of the protective tube. The second elastic member drives the second support rods to rotate, and keeps the distal ends of the second support rods in close contact with the outer wall of the protective tube.

[0008] As a further improvement of the present invention, the first support rod has a first support portion for closely adhering to and clamping the outer wall of the protective tube, and the second support rod has a second support portion closely adhering to the outer wall of the protective tube; the movement of the insertion rod along the direction of insertion into the base tube is adapted such that after the second support portion contacts the outer wall of the protective tube before the first support portion, the second support rod rotates and causes the two second support portions of the same support assembly to slide circumferentially along the outer wall of the protective tube and gradually move away from the first support portion.

[0009] As a further improvement of the present invention, two second support rods belonging to different support components and located on the same side of the outer wall of the protective tube are respectively provided with two parts that can form a locking component at their far ends, and the two slide circumferentially along the outer wall of the protective tube so that the two parts of the locking component gradually approach each other until they are engaged with each other.

[0010] As a further improvement of the present invention, the locking component is configured as a snap-fit ​​assembly including a male snap-fit ​​component and a female snap-fit ​​component, wherein the male snap-fit ​​is disposed at the distal end of one of the corresponding second support rods and the female snap-fit ​​is disposed at the distal end of the other corresponding second support rod.

[0011] As a further improvement of the invention, the first support portion is configured as a sleeve fitted into the middle of the first support rod and having an elasticity.

[0012] As a further improvement of the present invention, the second support is configured as a roller disposed at the distal end of the second support rod.

[0013] As a further improvement of the present invention, the first elastic element is constructed as a tension spring disposed in the base tube, with the two ends of the tension spring respectively connected to the ends of two insert rods inserted into the base tube.

[0014] As a further improvement of the present invention, a pivot is provided at the rotatable connection between the first support rod and the second support rod, and the second elastic element is constructed as a torsion spring disposed on the pivot.

[0015] As a further improvement of the present invention, it also includes two unlocking components corresponding to the two base tubes respectively. The unlocking components include a hand control rod located outside the base tube and two pins connected to the hand control rod. The two pins pass into the base tube and abut against the ends of the two rods respectively.

[0016] The beneficial effects of this invention are:

[0017] By installing a support assembly with a base tube, insertion rod, first support rod, and first elastic element outside the outer casing tube, the protective tube only needs to be inserted into the outer casing tube and the unlocking mechanism triggered. The tension of the first elastic element automatically clamps the protective tube on both sides using the first support rod, completely replacing the cumbersome multi-step operation of manual alignment, insertion of the top rod, and tightening of bolts required in the existing split-type protective shell, thus greatly simplifying the installation process. The outer casing tube forms a 360-degree circumferential full coverage of the protective tube, eliminating blind spots at the joints of the split-type protective shell and preventing the risk of local exposure. The added second support rod and second elastic element form a multi-point support, dispersing stress and improving the resistance to deformation. The second support part contacts the tube wall before the first support part and slides to expand, automatically correcting the eccentricity of the protective tube by means of the elastic force difference of the second elastic element, achieving stepless alignment. The locking assembly transforms the elastic support into a rigid lock, eliminating shaking caused by vibration, while retaining elastic preload to extend the component's life. The elastic sleeve of the first support buffers impact and is compatible with pipe diameter tolerances; the roller of the second support converts sliding friction into rolling friction, protecting the pipe wall and reducing traction resistance. Built-in tension and torsion springs provide stable and durable driving force, and the unlocking mechanism design further simplifies construction, with single-action triggering and foolproof design, significantly improving installation efficiency and quality consistency. Attached Figure Description

[0018] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings to aid in understanding the objectives and advantages of the present invention, wherein:

[0019] Figure 1 This is a schematic diagram of the protective pipe assembly;

[0020] Figure 2 This is a side view of the protection pipe assembly. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0022] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the construction shown in the accompanying drawings. The terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0023] This embodiment illustrates a structurally reinforced protective tube assembly that enables circumferential full coverage and fixation of the protective tube 1 without complicated operations. It aims to fundamentally solve the technical problems of cumbersome assembly procedures and the inability to continuously close the outer shell, leading to partial exposure, in existing CM cable protective tube 1 technologies. (Refer to...) Figure 1 and Figure 2The protective tube assembly includes a protective tube 1 containing a cable, an outer casing tube 2 covering the protective tube 1, and a support assembly for fixing the protective tube 1 inside the outer casing tube 2. Specifically, the support assembly includes two base tubes 31 symmetrically and perpendicularly arranged around the outer casing tube 2, two support components symmetrically arranged around the outer casing tube 2, and a first elastic element (not shown in the figure). The support assembly further includes two insertion rods 34 slidably inserted into one end of each of the two base tubes 31, and a first support rod 32 connecting the two insertion rods 34. The outer casing tube 2 has a through groove 21 allowing the first support rod 32 to pass into the outer casing tube 2. Its operating mechanism is that the movement of the insertion rods 34 along the direction of insertion into the base tubes 31 drives the two first support rods 32 to retract synchronously inward, thereby clamping the opposite sides of the outer wall of the protective tube 1. During this process, the first elastic element continuously drives the insertion rods 34 to move along the corresponding base tubes 31, providing pre-tightening force. Compared to the cumbersome assembly process in existing technologies, which requires manual alignment of the first and second protective shells, insertion of top rods one by one, and tightening of multiple bolts and nuts, this solution only requires inserting the protective tube 1 into the outer shell tube 2. The energy storage characteristics of the first elastic element can automatically complete the clamping and fixing, greatly simplifying the operation. More importantly, the outer shell tube 2, as a complete cylindrical structure, provides 360-degree circumferential full coverage of the protective tube 1, completely eliminating the blind spots left at the joints due to the use of split protective shells in existing technologies, and preventing the risk of direct impact from external forces or environmental erosion caused by local exposure.

[0024] In this embodiment, to further enhance the radial bending and deformation resistance of the protective tube 1, two second support rods 33 symmetrically positioned about both sides of the first support rod 32, and a second elastic element (not shown in the figure) are added to the basic clamping structure. The first support rod 32 serves as the main load-bearing frame, with the second support rods 33 rotatably connected to its two sides. This rotatable connection provides the second support rods 33 with a certain degree of freedom of movement, allowing their distal ends to adapt to protective tubes 1 of different diameters and to slide circumferentially along the outer wall of the protective tube 1. The second elastic element is always in an energy-storing state, continuously driving the second support rods 33 to open outwards, ensuring that their distal ends are tightly against the outer wall of the protective tube 1. During actual installation, when the first support rod 32 is driven inwards, the second support rods 33 will contact the protective tube 1 before the first support rod 32, and under pressure, will adaptively deflect until they are completely against the tube wall. This design overcomes the drawbacks of traditional two-point clamping where stress is concentrated. By introducing a multi-point support mechanism, the stress originally concentrated on the first support rod 32 is distributed to multiple second support rods 33. When the protective tube 1 is subjected to external uneven compression or internal thermal expansion and contraction stress, the multiple support points can effectively suppress the torsional deformation of the tube body, prevent overload failure of a single support point, and significantly improve the structural stability and long-term reliability of the entire tube assembly under complex working conditions.

[0025] In this embodiment, to further improve the balance of the support and achieve automatic centering and correction of the installation position of the protective tube 1, the first support rod 32 has a first support portion 321 for tightly adhering to and clamping the outer wall of the protective tube 1, and the second support rod 33 has a second support portion 331 for tightly adhering to the outer wall of the protective tube 1. In the timing of the support assembly's operation, the movement of the insertion rod 34 along the direction of insertion into the base tube 31 causes the second support portion 331 to contact the outer wall of the protective tube 1 before the first support portion 321. As the insertion rod 34 continues to penetrate deeper, the second support rod 33 rotates under the reaction force of the second elastic element, causing the two second support portions 331 of the same support assembly to slide circumferentially along the outer wall of the protective tube 1 and gradually move away from the first support portion 321, ultimately forming a support shape similar to the figure eight. If the protective tube 1 is eccentric (e.g., biased to one side) when inserted into the outer shell tube 2, the second support portion 331 on the closer side will touch the bottom earlier and generate greater compressive deformation, while the second support portion 331 on the farther side will deform less. Since the elastic force of the second elastic element is proportional to the deformation, the difference in elastic force between the two sides will generate a center-pointing restoring torque, automatically pushing the offset protective tube 1 back to the center position. Once the protective tube 1 returns to the center, the deformation of the second support 331 around the perimeter tends to be consistent, and the elastic force reaches equilibrium, thereby realizing the automatic centering function without manual calibration, ensuring the centering of the protective tube 1 in the pipeline, and avoiding unilateral wear or stress concentration caused by eccentricity.

[0026] In this embodiment, to optimize the flexible support that originally relied on elastic force and thus completely eliminate tube swaying, two second support rods 33, located on different sides of the outer wall of the protective tube 1, are used. Their distal ends form two parts of the locking assembly. After the support assembly completes its clamping action, as the second support portion 331 slides circumferentially along the tube wall, the distal ends of the two second support rods 33 gradually approach each other until they are engaged. During the elastic support stage, although the protective tube 1 is fixed, it may still experience slight displacement due to high-frequency external vibrations, which can lead to fatigue and loosening of the elastic elements over time. The locking assembly upgrades the "flexible clamping" provided by the first and second elastic elements to "rigid locking." Once the locking assembly engages, the relative position between the second support rod 33 and the protective tube 1 is physically fixed, no longer relying on the deformation of the elastic elements to maintain position, thereby greatly improving the stability of the support and effectively suppressing resonance of the protective tube 1 caused by fluid transport or external mechanical vibrations. Meanwhile, the first and second elastic elements do not lose their function. As a continuous source of pre-tightening force, they continue to press tightly against the locking assembly to prevent the lock from loosening due to impact. This dual mechanism of "elastic pre-tightening + rigid limiting" not only extends the service life of the elastic elements but also ensures the connection strength under extreme working conditions.

[0027] In this embodiment, to further simplify the locking operation and ensure the reliability of the connection, the locking assembly is specifically constructed as a snap-fit ​​assembly including a male snap-fit ​​component 351 and a female snap-fit ​​component 352. The male snap-fit ​​component 351 is fixedly disposed at the distal end of one of the corresponding second support rods 33, while the female snap-fit ​​component 352 is disposed at the distal end of the other second support rod 33. During installation, as the second support rods 33 slide and expand, the male snap-fit ​​component 351 aligns with the female snap-fit ​​component 352 and snaps into it, producing a crisp "click" sound, providing clear feedback to the operator. Compared to traditional bolt locking, the snap-fit ​​assembly requires no additional tools and eliminates the risk of thread stripping. From the perspective of mechanical transmission, the snap-fit ​​assembly forms a closed triangular or polygonal support structure, converging and canceling out the forces dispersed on each support rod, making the entire support assembly a rigid body. This setup is particularly suitable for scenarios where secondary fastening and maintenance are difficult, such as direct underground burial or high-altitude erection. Even under conditions of soil settlement or wind load swaying, the buckle assembly can always maintain a firm binding on the protective pipe 1 due to its structural self-locking characteristics, preventing the protective pipe 1 from sagging or breaking due to loosening.

[0028] In this embodiment, to buffer the direct rigid impact of the first support rod 32 on the protective tube 1 and improve the contact friction, the first support part 321 is constructed as an elastic sleeve fitted into the middle of the first support rod 32. This sleeve is preferably made of wear-resistant rubber, polyurethane, or a polymer composite material with high damping properties. When the first support rod 32 moves towards the protective tube 1 and finally contacts it, the elastic sleeve first undergoes elastic compression, absorbing most of the impact kinetic energy and preventing coating peeling or tube wall damage that might occur from direct impact of the hard metal support on the protective tube 1. Simultaneously, the inherent coefficient of friction of the elastic material is much greater than that of metal, significantly increasing the static friction between the elastic material and the outer wall of the protective tube 1, preventing the protective tube 1 from shifting under axial load. Furthermore, since the protective tube 1 may have ellipticity errors or outer diameter tolerances during production, the deformation adaptability of the elastic sleeve can compensate for these manufacturing errors, ensuring that the first support part 321 provides a uniform and tight clamping force regardless of fluctuations in the outer diameter of the protective tube 1, demonstrating excellent tolerance compatibility and adaptability.

[0029] In this embodiment, to reduce the sliding friction resistance between the distal end of the second support rod 33 and the outer wall of the protective tube 1 and to reduce tube wall wear, the second support part 331 is constructed as a roller disposed at the distal end of the second support rod 33. In the initial stage of the support assembly's operation, the second support rod 33 needs to slide along the tube wall to achieve expansion and centering. If a slider structure is used, the enormous sliding friction will not only consume the driving force of the first elastic element but also easily scratch the anti-corrosion coating on the outer wall of the protective tube 1. The roller transforms sliding friction into rolling friction, reducing the coefficient of friction. This makes the support assembly's movement smoother and more sensitive, requiring less driving force, while also protecting the integrity of the protective tube 1's surface. When the protective tube 1 needs to be pulled out for replacement or adjustment later, the roller can also act as a guide, greatly reducing traction resistance. Furthermore, the roller is typically made of wear-resistant engineering plastic, which can carry away abrasive particles through its rotation even in harsh environments containing a small amount of sand and gravel, preventing abrasive particles from embedding into the support surface and causing continuous wear on the protective tube 1, thus extending the service life of the entire tube assembly.

[0030] In this embodiment, to ensure that the first elastic element can provide a stable and durable retraction force, the first elastic element is constructed as a tension spring disposed within the base tube 31. The two ends of the tension spring are connected to the ends of two insert rods 34 inserted into the base tube 31 via hooks or connecting rings. The tension spring is encapsulated inside the base tube 31, receiving not only physical protection from the tube wall but also having its working stroke confined within the base tube 31. When the insert rod 34 is pulled outward to prepare for the installation of the protective tube 1, the tension spring is stretched and stores energy; when the insert rod 34 is released, the spring's contraction force is instantly converted into the inward thrust of the insert rod 34. This built-in tension spring layout makes the entire support assembly compact, with a neat shape and no protruding parts, facilitating transportation and storage. Furthermore, since the tension spring's force can be precisely set by selecting different wire diameters and coil numbers, it can match the requirements of protective tubes 1 of different weights and specifications, offering strong versatility. The linear or nonlinear tension provided by the tension spring ensures that the protective tube 1 is always subjected to a uniform and controllable clamping force throughout the entire clamping stroke, and there will be no situation where the clamping force fluctuates.

[0031] In this embodiment, a rotating shaft is provided at the rotatable connection between the first support rod 32 and the second support rod 33, and the second elastic element is constructed as a torsion spring disposed on the rotating shaft. One end of the torsion spring abuts against the body of the first support rod 32, and the other end abuts against the body of the second support rod 33. This integrated arrangement makes the second support rod 33 an independent modular component, facilitating mass production and assembly. The torsion spring not only provides the power to open the second support rod 33, but also plays a positioning role. That is, under no external force, the second support rod 33 is maintained at its maximum unfolding angle, facilitating the insertion of the protective tube 1; when the protective tube 1 is inserted, the tube wall presses the second support rod 33 to overcome the torsion spring force and retract inward. The torque provided by the torsion spring is stable and reliable, unaffected by ambient temperature, and has a long service life. Compared with using rubber blocks or other elastic pads as elastic elements, the mechanical response of the torsion spring is more rapid, ensuring that the second support rod 33 is always in close contact with the tube wall. Even when the protective tube 1 experiences minor vibrations, the torsion spring can quickly compensate for displacement and maintain constant contact pressure, thereby providing excellent dynamic support performance.

[0032] In this embodiment, to further optimize on-site construction efficiency and provide foolproof protection, two unlocking components corresponding to the two base pipes 31 are added respectively. The unlocking components include a hand-operated lever 41 located outside the base pipe 31 and two pins 42 connecting the hand-operated lever 41. The two pins 42 penetrate into the base pipe 31 and abut against the ends of the two insert rods 34 respectively. Before installation, the unlocking components are in a locked state, with the pins 42 pressing against the insert rods 34 to prevent them from being pulled back by the tension spring. During construction, the operator only needs to hold the hand-operated lever 41 with one hand and pull out the unlocking component. The pins 42 then exit the base pipe 31, releasing the restriction on the insert rods 34. At this time, the tension spring instantly releases energy, causing the insert rods 34 and the support rod to automatically clamp and lock the protective pipe 1. The entire process requires only one pull-out action, which is several times more efficient than the cumbersome operation of tightening dozens of bolts and nuts in the prior art. Furthermore, to prevent the unlocking component from accidentally falling off during transportation or handling and causing premature device triggering, the system allows the use of tape or cable ties to temporarily secure the unlocking component to the base pipe 31. This "pre-installation-unlocking" operation mode simplifies the complex on-site assembly work into an extremely simple triggering action, greatly reducing the labor intensity and technical threshold for construction workers. It is particularly suitable for the rapid paving needs of large-scale infrastructure construction, while also ensuring that the tightening torque of each node is consistent, avoiding the quality dispersion problems caused by manual tightening.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. 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 do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A structurally reinforced protective pipe assembly, characterized in that, It includes a protective tube with a built-in cable, an outer casing tube that covers the protective tube, and a support assembly for fixing the protective tube inside the outer casing tube; The support assembly includes two base tubes symmetrically arranged about the outer casing and perpendicularly disposed outside the outer casing, two support assemblies symmetrically arranged about the outer casing, and a first elastic element; the support assembly includes two insert rods slidably inserted into one end of the two base tubes respectively, and a first support rod connecting the two insert rods. The outer casing has a through groove that allows the first support rod to pass into the outer casing. The movement of the insert rods of the two support assemblies along the direction away from the base tubes is adapted to allow the two first support rods to clamp the opposite sides of the outer wall of the protective tube. The first elastic element drives the insert rods to move along the direction away from the corresponding base tubes.

2. The protective tube assembly according to claim 1, characterized in that, The support assembly further includes two second support rods symmetrical about both sides of the first support rod, and a second elastic element. The second support rods are rotatably connected to the first support rod, so that their distal ends away from the rotatable connection can slide circumferentially along the outer wall of the protective tube. The second elastic element drives the second support rods to rotate, and keeps the distal ends of the second support rods in close contact with the outer wall of the protective tube.

3. The protective tube assembly according to claim 2, characterized in that, The first support rod has a first support portion for closely adhering to and clamping the outer wall of the protective tube, and the second support rod has a second support portion closely adhering to the outer wall of the protective tube; the movement of the insertion rod along the direction away from the base tube is adapted such that after the second support portion contacts the outer wall of the protective tube before the first support portion, the second support rod rotates and causes the two second support portions of the same support assembly to slide circumferentially along the outer wall of the protective tube and gradually move away from the first support portion.

4. The protective tube assembly according to claim 3, characterized in that, Two second support rods, belonging to different support components and located on the same side of the outer wall of the protective tube, have two parts at their distal ends that can form a locking assembly. The two rods slide circumferentially along the outer wall of the protective tube, causing the two parts of the locking assembly to gradually approach each other until they are engaged.

5. The protective tube assembly according to claim 4, characterized in that, The locking assembly is configured as a snap-fit ​​assembly including a male snap-fit ​​component and a female snap-fit ​​component, wherein the male snap-fit ​​is disposed at the distal end of one of the corresponding second support rods, and the female snap-fit ​​is disposed at the distal end of the other corresponding second support rod.

6. The protective tube assembly according to claim 4, characterized in that, The first support portion is configured as a sleeve that fits into the middle of the first support rod and has elasticity.

7. The protective tube assembly according to claim 4, characterized in that, The second support is configured as a roller located at the distal end of the second support rod.

8. The protective tube assembly according to claim 1, characterized in that, The first elastic element is configured as a tension spring disposed within the base tube, with its two ends respectively connected to the ends of two insert rods inserted into the base tube.

9. The protective tube assembly according to claim 2, characterized in that, A pivot is provided at the rotatable connection between the first support rod and the second support rod, and the second elastic element is constructed as a torsion spring disposed on the pivot.

10. The protective tube assembly according to any one of claims 1-9, characterized in that, It also includes two unlocking components corresponding to the two base tubes respectively. The unlocking components include a hand control rod located outside the base tube and two pins connected to the hand control rod. The two pins pass through the base tube and abut against the ends of the two pins respectively.

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