High-stability BWFRP glass fiber cable protection pipe

Abstract

The utility model relates to the technical field of cable protection tubes, in particular to a high-stability BWFRP glass fiber cable protection tube, which comprises a plurality of protection tube bodies and a plurality of radial fixing pieces arranged on the protection tube bodies. An annular step is arranged on the inner wall of one end of the protection pipe body; when the two protection pipe bodies are connected end to end, the annular step and the annular flange are mutually nested; the radial fixing piece radially penetrates through the protection pipe body, and the inner end extends to the annular step; bevel structures which interact with each other are arranged between the inner ends of the radial fixing pieces and the annular flanges. In the process that every two adjacent protection pipe bodies are close to each other end to end for connection, the annular flanges convert axial displacement into radial thrust through the slope structures, so that the radial fixing pieces move in the radial direction to fix the cable. The cable protection pipe can solve the problems that a bolt fixing structure adopted by an existing cable protection pipe is low in fixing operation efficiency and poor in pressure balance.

Description

Technical Field

[0001] This utility model relates to the field of cable protection pipe technology, specifically to a high-stability BWFRP glass fiber cable protection pipe. Background Technology

[0002] Cable protection pipes are conduits used to protect cables. BWFRP (glass fiber reinforced polymer) cable protection pipes are made primarily from alkali-free glass fiber and high-performance resins (such as polyester resin or epoxy resin), using a continuous fiber online weaving, winding, and pultrusion molding process. This process achieves a dense arrangement of fibers in both the longitudinal and circumferential directions, improving the mechanical properties of the pipe.

[0003] In traditional cable protection pipe fixing structures, internal cables are often secured by tightening rubber pads with rotating bolts. This method requires manual adjustment of pressure by individually tightening each bolt, which has the following drawbacks:

[0004] 1. Low operational efficiency: The multi-bolt layout requires rotating and adjusting each bolt one by one, which is time-consuming in confined spaces or dense wiring scenarios;

[0005] 2. Poor pressure uniformity: Manual adjustment makes it difficult to ensure that the downward pressure of each bolt on the rubber pad is uniform, which can easily lead to localized cable deformation due to pressure.

[0006] Existing improvements (such as CN218275917U) enhance the structural strength of the conduit by optimizing the BWFRP and wear-resistant layers, but they do not address the fundamental flaws of the bolt fixing mechanism. Some alternative solutions attempt to use clips or straps to secure the cables, but these are difficult to implement due to weak vibration resistance and susceptibility to aging. Especially in scenarios requiring rapid, large-scale installation, such as municipal engineering projects, traditional bolt fixing structures severely restrict construction efficiency. Therefore, there is an urgent need for a cable fixing solution that allows for rapid pressure application / release and even pressure distribution to replace the rotating bolt structure. Utility Model Content

[0007] In view of this, the purpose of this utility model is to provide a high-stability BWFRP glass fiber cable protection pipe to solve the problems of low fixing efficiency and poor pressure uniformity of the bolt fixing structure used in existing cable protection pipes.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A high-stability BWFRP glass fiber cable protection tube includes: multiple protection tube bodies and several radial fasteners disposed on the protection tube bodies;

[0010] The inner wall of one end of the protective tube is provided with an annular step, and the end face of the other end is provided with an annular flange; when the two protective tubes are connected end to end, the annular step and the annular flange are nested together.

[0011] The radial fastener penetrates the protective tube body radially and extends its inner end to the annular step; the inner end of the radial fastener and the annular flange have an interacting inclined structure;

[0012] During the process of connecting two adjacent protective tubes by bringing them closer together, the annular flange converts the axial displacement into radial thrust through the inclined structure, causing the radial fixing member to move radially and fix the cable.

[0013] As a further embodiment of this utility model: flanges are provided at both ends of the protective pipe body, and the ends of two adjacent protective pipe bodies are connected and fixed by bolts through the flanges.

[0014] As a further embodiment of this utility model: the inner edge of one end of the annular flange is provided with a first inclined surface; the inner edge of one side of the radial fixing member is provided with a second inclined surface; the first inclined surface can slide along the second inclined surface to form the inclined surface structure.

[0015] As a further improvement of this utility model, the inner edge of the radial fixing member is chamfered.

[0016] As a further improvement of this utility model, four radial fixing members are provided and are evenly distributed along the circumference of the protective tube body.

[0017] As a further embodiment of this utility model: the radial fixing member is T-shaped, the horizontal side of the radial fixing member is located outside the protective tube body, and the vertical side radially penetrates the protective tube body and extends to the annular step.

[0018] As a further embodiment of this utility model, the inner end face of the radial fixing member is arc-shaped to fit the cable surface.

[0019] As a further embodiment of this utility model, the angle between the inclined surface structure and the axial direction of the protective tube body is 30-60°.

[0020] By adopting the above technical solution, this utility model will have the following beneficial effects:

[0021] This invention provides a high-stability BWFRP fiberglass cable protection tube. Through the nested connection of annular steps and annular flanges at both ends of the tube, combined with the cooperation of radial fixing components and a beveled structure, the axial connection action of the protection tube is automatically transformed into the synchronous inward movement of the radial fixing components to compress the cable. This achieves connection and fixation in a single step, replacing the tedious process of individually tightening bolts. Multiple circumferentially distributed radial fixing components move synchronously radially under the drive of the beveled structure, ensuring uniform distribution of compressive force on the cable and preventing localized overpressure that could lead to cable deformation. Disassembly only requires separating the protection tube; the radial fixing components automatically release their constraints, supporting non-destructive and rapid disassembly, making it suitable for scenarios requiring frequent maintenance.

[0022] Compared with the existing cable protection pipes that use rotating bolts to press rubber pads to fix internal cables, this utility model can significantly improve installation efficiency and has low pressure uniformity error, which can better meet the protection requirements of high-strength and high-stability cables. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a perspective sectional view of the high-stability BWFRP glass fiber cable protection pipe described in this embodiment of the invention in the state of connection between two protection pipe bodies;

[0025] Figure 2 for Figure 1 Enlarged view of the connection point between the two protective pipes;

[0026] Figure 3 for Figure 1 A perspective view of the high-stability BWFRP fiberglass cable protection tube described in the embodiment, with two protection tube bodies connected together;

[0027] Figure 4 for Figure 1 A perspective view of the high-stability BWFRP glass fiber cable protection tube described in the embodiment;

[0028] Figure 5 for Figure 1 A perspective view of the radial fastener described in the embodiment.

[0029] Reference numerals: 1. Protective pipe body; 11. Annular step; 12. Annular flange; 2. Radial fastener; 21. Chamfer; 3. Inclined structure; 31. First inclined surface; 32. Second inclined surface; 4. Flange; 41. Bolt. Detailed Implementation

[0030] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the following description is to be considered exemplary in nature and not restrictive.

[0031] Please refer to Figure 1-5 In one embodiment of the high-stability BWFRP fiberglass cable protection pipe provided by this utility model, the high-stability BWFRP fiberglass cable protection pipe includes a plurality of protection pipe bodies 1 and a plurality of radial fixing members 2 disposed on the protection pipe bodies 1:

[0032] The protective tube body 1 is manufactured using existing BWFRP (Bright Wrought Iron Reinforced Plastic) fiberglass cable protection tube technology: high-temperature and high-pressure curing and molding, while optimizing material properties through a three-layer composite structure (inner braided layer, middle layer, and outer braided layer); the middle layer enhances ring stiffness through longitudinal fibers and spirally wound fibers, while the inner and outer braided layers improve impact resistance through braiding designs at different angles. Due to the combination of braided winding pultrusion technology and fiberglass reinforcement technology, it possesses advantages such as high strength, impact resistance, corrosion resistance, and weather resistance. One end of the protective tube body 1 has an annular step 11 on its inner wall, and the other end has an annular flange 12. Both the annular step 11 and the annular flange 12 are integrally formed and connected to the protective tube body 1; when two protective tube bodies 1 are connected end-to-end, the annular step 11 and the annular flange 12 are nested within each other, with a gap left on the annular step 11.

[0033] The radial fastener 2 is radially movable through the protective tube 1, and the inner end of the radial fastener 2 extends to the interval of the annular step 11. The inner end of the radial fastener 2 and the annular flange 12 have an interacting inclined structure 3. Specifically, the inner edge of one end of the annular flange 12 is provided with a first inclined surface 31, and the inner edge of the radial fastener 2 is provided with a second inclined surface 32. When the annular flange 12 moves axially toward the radial fastener 2 along the protective tube 1, the first inclined surface 31 can slide along the second inclined surface 32 to form the inclined structure 3.

[0034] When installing this example on the cable, multiple protective tubes 1 need to be sequentially fitted onto the cable and connected end to end. Specifically, flanges 4 can be welded to both ends of the protective tube 1, and the ends of two adjacent protective tubes 1 are connected and fixed by flanges 4 and bolts 41. During the process of connecting two adjacent protective tubes 1, the annular flange 12 converts the axial displacement into radial thrust through the inclined structure 3, causing the radial fixing member 2 to move radially inward along the protective tube 1 until the ends of the two protective tubes 1 are fixed, at which point the radial fixing member 2 can automatically press and fix the cable.

[0035] As a preferred embodiment, the inner edge of the radial fixing member 2 facing away from the annular flange 12 is provided with a chamfer 21. The inclination angle of the chamfer 21 is preferably parallel to the inclined structure 3. When the protective tube 1 is put on the cable from one end of the cable, the design of the chamfer 21 can play a guiding role, making it easier for the cable to lift the radial fixing member 2 and prevent it from hindering the movement of the protective tube 1.

[0036] As a preferred embodiment, the number of radial fasteners 2 can be set to four. These four radial fasteners 2 are evenly distributed around the circumference of the protective tube body 1, which can form two pairs of opposing forces in a crisscross pattern, thereby improving the fixing effect.

[0037] As a preferred embodiment, the radial fastener 2 can be configured in a "T" shape, with the horizontal side of the radial fastener 2 located outside the protective tube 1. The protective tube 1 has a strip-shaped opening, the length and width of which are slightly larger than the strip-shaped opening. The vertical side passes radially through the strip-shaped opening and extends to the annular step 11. The height of the vertical side is greater than the wall thickness of the protective tube 1, and the length and width are slightly smaller than the strip-shaped opening, so that the radial fastener 2 can move within the limitation range of the horizontal side and the inclined structure 3, preventing it from falling off.

[0038] As a preferred embodiment, the inner end face of the radial fastener 2 can be set in an arc shape to fit the cable surface. It is also preferable to attach a rubber pad to the arc surface to increase the fit and further improve the fixing effect.

[0039] As a preferred embodiment, the angle θ between the inclined structure 3 and the axial direction of the protective tube 1 can satisfy: tanθ>μ (μ is the sliding friction coefficient of the first inclined surface 31 and the second inclined surface 32). The inclination angle θ is usually set to 30-60° to achieve stepless acceleration after self-locking release, so that the radial fixing member 2 can move smoothly radially inward.

[0040] The method of use or working principle of this utility model is as follows:

[0041] First, multiple protective tubes 1 are sequentially placed on the cable, and the annular flanges 12 and annular steps 11 of two adjacent protective tubes 1 are nested together. Then, the two protective tubes 1 are brought closer together end to end until the first inclined surface 31 fits against the second inclined surface 32. Next, the bolts 41 on the flange 4 are tightened to bring the two protective tubes 1 closer together. During this process, the first inclined surface 31 is restricted from radial movement by the bolts 41, so the radial fixing member 2 can move radially inward along the protective tube 1 under the axial thrust of the annular flange 12 until the radial fixing member 2 presses the cable. Finally, the bolts 41 are tightened to fix the connection between the two protective tubes 1 and press the cable, thereby stably installing the protective tubes 1 on the cable.

[0042] When it is necessary to disassemble the protective tube 1, loosen and remove the bolt 41 to separate the two adjacent protective tubes 1. After separation, the radial fixing member 2 loses the restriction of the annular flange 12 and can move freely in the radial direction, so that the protective tube 1 can be removed from the cable.

[0043] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-stability BWFRP glass fiber cable protection tube, characterized in that, The utility model relates to a kind of cable protection device, including: Multiple protective tube bodies (1) and several radial fixing pieces (2) arranged on the protective tube body (1); The inner wall of one end of the protective tube body (1) is provided with an annular step (11), and the end face of the other end is provided with an annular flange (12);When two protective tube bodies (1) are connected head to tail, the annular step (11) and the annular flange (12) are nested with each other; The radial fixing piece (2) radially penetrates the protective tube body (1), and the inner end extends to the annular step (11);The inner end of the radial fixing piece (2) and the annular flange (12) have a mutual action inclined surface structure (3); During the process of connecting two adjacent protective tube bodies (1) head to tail, the annular flange (12) converts axial displacement into radial thrust through the inclined surface structure (3), so that the radial fixing piece (2) moves radially to fix the cable.

2. The high-stability BWFRP glass fiber cable protection pipe according to claim 1, characterized in that, The two ends of the protective tube body (1) are respectively provided with flanges (4), and the heads and tails of two adjacent protective tube bodies (1) are connected and fixed by cooperating bolts (41) through the flanges (4).

3. The high-stability BWFRP glass fiber cable protection pipe according to claim 1, characterized in that, The inner side edge of one end of the annular flange (12) is provided with a first inclined surface (31);The inner end of the radial fixing piece (2) is provided with a second inclined surface (32) on one side edge;The first inclined surface (31) can slide along the second inclined surface (32) to form the inclined surface structure (3).

4. The high-stability BWFRP glass fiber cable protection pipe according to claim 3, characterized in that, The other side edge of the inner end of the radial fixing piece (2) is provided with a chamfer (21).

5. The high-stability BWFRP glass fiber cable protection pipe according to claim 1, characterized in that, The radial fixing piece (2) is provided with four, and is arranged along the protective tube body (1) circumferentially.

6. The high-stability BWFRP glass fiber cable protection pipe according to claim 1, characterized in that, The radial fixing piece (2) is T-shaped, and the horizontal edge of the radial fixing piece (2) is located outside the protective tube body (1), and the vertical edge radially penetrates the protective tube body (1) and extends to the annular step (11).

7. The high-stability BWFRP glass fiber cable protection pipe according to claim 1, characterized in that, The inner end face of the radial fixing piece (2) is arc-shaped to fit the surface of the cable.

8. The high-stability BWFRP glass fiber cable protection pipe according to claim 1, characterized in that, The included angle between the inclined surface structure (3) and the axial direction of the protective tube body (1) is 30-60°.

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