Directionally adjustable cable protection tube

Abstract

The present application relates to cable protection pipe technical field, specifically to a kind of direction adjustable cable protection pipe, including hard pipe, bellows, mounting seat, connecting seat, screw seat and the like;Bellow is arranged between hard pipe, and the circumferential outer wall of hard pipe near bellow one end is evenly provided with mounting seat, connecting seat is rotatably arranged on mounting seat, connecting seat can be vertically fixed on mounting seat also can be flatly stored in mounting seat, and the end of connecting seat away from mounting seat is hingedly provided with screw seat, when connecting seat is perpendicular on mounting seat, the screw seat on the opposite two connecting seats is respectively rotatably connected with outer thread rod and inner thread pipe. By being evenly provided with mounting seat in the circumferential direction of hard pipe, connecting seat with switchable vertical or storage state is arranged on mounting seat, and operator can select any direction for bending control according to actual path requirement on site, and the adjustment of bellow bending angle is realized by the cooperation of outer thread rod and inner thread pipe, without replacing elbow.

Description

Technical Field

[0001] This invention relates to the field of cable protection pipe technology, and more specifically to a cable protection pipe with adjustable direction. Background Technology

[0002] Cable protection conduits are widely used in power and communication cable laying projects to protect cables from external mechanical damage, corrosion, and environmental factors. In actual projects, cable routes often need to bypass obstacles, building corners, or adapt to terrain undulations, thus requiring the protection conduits to have a certain degree of bending capability.

[0003] Chinese Patent No. CN105914674B discloses a cable protection pipe, which includes: a connecting flange, an intermediate pipe body, a tapered connecting pipe, and a connector. The connecting flange includes a flange plate and a flange connecting pipe disposed on one side of the plane of the flange plate. The connecting flange is connected to one end of the intermediate pipe body via the flange connecting pipe, and the other end of the intermediate pipe body is connected to the tapered connecting pipe via the connector. The connector is a pipe body open at both ends; one end of the connector is disposed inside the other end of the intermediate pipe body and fixedly connected to the intermediate pipe body, and the other end of the connector is disposed inside one end of the tapered connecting pipe and fixedly connected to the tapered connecting pipe.

[0004] The cable protection pipe is connected to the cable duct on the wind turbine through a connecting flange to protect the output cable of the wind turbine. However, during use, the connection of the cable protection pipe is mostly a rigid straight pipe structure. When encountering a bend in the path, it must rely on prefabricated elbow fittings for connection. This method has a fixed bending direction and cannot flexibly adjust the angle or direction according to the site conditions. Various specifications of elbows need to be prepared during construction, which increases the cost and installation complexity.

[0005] Therefore, it is necessary to design a cable protection pipe that can flexibly adjust the bending direction as needed to overcome the above-mentioned defects. Summary of the Invention

[0006] The technical solution is as follows: An adjustable cable protection pipe includes a rigid pipe, a corrugated pipe, a mounting base, a connecting base, a screw base, an externally threaded rod, and an internally threaded pipe. The corrugated pipe is arranged between the rigid pipes. Mounting bases are evenly spaced on the circumferential outer wall of the rigid pipe near the corrugated pipe end. A connecting base is rotatably mounted on the mounting base. The connecting base can be vertically fixed on the mounting base or laid flat and stored inside the mounting base. A screw base is hinged to the end of the connecting base away from the mounting base. When the connecting base is perpendicular to the mounting base, an externally threaded rod and an internally threaded pipe are rotatably connected to the screw bases on the two opposite connecting bases, respectively. The ends of the externally threaded rod and the internally threaded pipe away from the screw base are threaded together. Rotating the externally threaded rod or the internally threaded pipe causes the externally threaded rod to screw into the inside of the internally threaded pipe, so that the corrugated pipe bends in the direction of the internally threaded pipe.

[0007] To further explain, the mounting base has a hinge hole, and the hinge shaft of the connecting base is rotatably disposed in the hinge hole. A first pin hole and a second pin hole are respectively provided in the horizontal and vertical directions centered on the hinge hole. A fixing pin is detachably disposed in the first pin hole and the second pin hole. When the connecting base is flat and stored in the mounting base, the fixing pin is inserted into the first pin hole and passes through the connecting base, thereby fixing the connecting base horizontally in the mounting base. When the connecting base is perpendicular to the mounting base, the fixing pin is inserted into the second pin hole and passes through the connecting base, thereby keeping the connecting base vertically fixed to the mounting base.

[0008] To further explain, the center points of the first pin hole, the second pin hole, and the hinge hole form a right-angled triangle.

[0009] To further explain, the outer wall of the rigid pipe near one end of the corrugated pipe is provided with an annular mounting bracket that circumferentially surrounds it. A skeleton rod assembly is provided between the annular mounting brackets. The skeleton rod assembly includes a first skeleton rod that is slidably mounted on the annular mounting bracket and a second skeleton rod that is slidably mounted on another annular mounting bracket. The first skeleton rod and the second skeleton rod are hinged together.

[0010] To further explain, a spring is provided between the ends of the first and second skeleton rods that are far apart from each other and the annular mounting bracket.

[0011] To further explain, the annular mounting bracket has an annular groove circumferentially arranged on it. A gear ring that can rotate along the track of the annular groove is provided in one of the annular mounting brackets. A drive shaft is rotatably arranged on the annular mounting bracket, and a drive gear is mounted on the drive shaft. The drive gear meshes with the gear ring. A driven gear is slidably arranged on the first or second skeleton rod that slides through the annular mounting bracket by means of a key connection. The driven gear meshes with the gear ring.

[0012] To further explain, a protective pad is provided on the outside of the corrugated pipe.

[0013] To further explain, the inner cavity of the protective pad is filled with a hydraulic cementitious material, and a water injection pipe is installed on the protective pad, which is connected to the inner cavity of the protective pad.

[0014] The beneficial effects of the present invention are as follows: 1. By uniformly arranging mounting seats at intervals around the rigid pipe, and providing connecting seats that can be switched to vertical or retracted states on the mounting seats, operators can select any direction for bending control according to the actual path requirements on site, and adjust the bending angle of the corrugated pipe through the cooperation of the external thread rod and the internal thread pipe, without the need to replace the elbow, which significantly improves the adaptability to complex laying paths.

[0015] 2. A first and second skeleton rod that can slide and hinge along the annular mounting frame are provided. In conjunction with the gear ring and driven gear transmission system, the skeleton rods automatically deflect in the bending direction during the bending process, thereby establishing rigid support on the outside of the bellows to protect the bellows.

[0016] 3. The corrugated pipe is equipped with a protective pad containing cement-based hydraulic cementitious material on the outside. After bending into place, water is injected through the water injection pipe, and the material hardens to form a rigid protective layer, which not only maintains the bending shape, but also greatly enhances the structural strength and resistance to external pressure of the protective pipe in the bending section. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a partial three-dimensional structural schematic diagram of the present invention.

[0019] Figure 3 For the present invention Figure 2 A partial three-dimensional structural diagram.

[0020] Figure 4 For the present invention Figure 3 A partial three-dimensional structural diagram.

[0021] Figure 5 For the present invention Figure 4 A second-view 3D structural diagram.

[0022] Figure 6 This is a partial three-dimensional structural diagram of the rigid tube, annular mounting bracket, first skeleton rod, second skeleton rod, and other components of the present invention.

[0023] Figure 7 This is a partial three-dimensional structural diagram of the first and second skeleton rods of the present invention in a separated state.

[0024] Figure 8 This is a three-dimensional structural diagram of the protective pad of the present invention.

[0025] The markings in the attached diagram are as follows: 1: rigid pipe, 101: annular mounting bracket, 1011: annular groove, 2: bellows, 3: mounting base, 31: fixing pin, 320: hinge hole, 321: first pin hole, 322: second pin hole, 4: connecting seat, 5: screw seat, 6: external threaded rod, 7: internal threaded pipe, 81: first skeleton rod, 82: second skeleton rod, 9: gear ring, 10: driving gear, 11: drive shaft, 12: spring, 13: driven gear, 14: protective pad, 15: water injection pipe. Detailed Implementation

[0026] The present invention will be further described below with reference to specific embodiments. The illustrative embodiments and descriptions herein are used to explain the present invention, but are not intended to limit the present invention.

[0027] Example: A directional adjustable cable protection conduit, such as Figure 1 As shown, it includes at least two rigid pipes 1 and a corrugated pipe 2 connected between two adjacent rigid pipes 1. The corrugated pipe 2 is made of metal or polymer corrugated pipe that is plastically deformable and has a certain rigidity, and can be bent and maintain its bent shape under external force.

[0028] like Figures 2-6 As shown, multiple mounting seats 3 are evenly spaced along the circumferential direction on the outer circumferential wall of each rigid pipe 1 near the end of the corrugated pipe 2. In this embodiment, each rigid pipe 1 has 4 mounting seats 3 at its end, and the included angle between adjacent mounting seats 3 is 90°. A connecting seat 4 is rotatably mounted on the mounting seat 3, and the connecting seat 4 has two working states: a flat storage state and a vertical fixed state. A hinge hole 320 is opened on the mounting seat 3, and one end of the connecting seat 4 is rotatably mounted in the hinge hole 320 through a hinge shaft. With the center of the hinge hole 320 as a reference, a first pin hole 321 is provided in the transverse direction of the mounting base 3 (i.e., the direction parallel to the axis of the rigid pipe 1), and a second pin hole 322 is provided in the longitudinal direction (i.e., the direction perpendicular to the axis of the rigid pipe 1). The second pin hole 322 is located directly above the hinge hole 320. A fixing pin 31 is detachably provided in the first pin hole 321 and the second pin hole 322. The center points of the first pin hole 321, the second pin hole 322 and the hinge hole 320 form a right triangle. When the connecting seat 4 is flat and stored in the mounting base 3, the fixing pin 31 is inserted into the first pin hole 321 and passes through the connecting seat 4, thereby horizontally storing the connecting seat 4 in the mounting base 3. When the connecting seat 4 is perpendicular to the mounting base 3, the fixing pin 31 is inserted into the second pin hole 322 and passes through the connecting seat 4, thereby keeping the connecting seat 4 vertically fixed on the mounting base 3.

[0029] like Figure 4 and Figure 5As shown, a screw seat 5 is hinged to the end of the connecting seat 4 away from the mounting seat 3. When both connecting seats 4 are perpendicular to the mounting seat 3, an external threaded rod 6 is rotatably connected to the screw seat 5 of one connecting seat 4, and an internal threaded tube 7 is rotatably connected to the screw seat 5 of the other connecting seat 4. The external thread of the external threaded rod 6 and the internal thread of the internal threaded tube 7 are matched. The ends of the external threaded rod 6 and the internal threaded tube 7 away from the screw seat 5 are threadedly connected. When the external threaded rod 6 or the internal threaded tube 7 is rotated, the external threaded rod 6 gradually screws into the internal threaded tube 7, increasing the thread engagement length and thus shortening the straight-line distance between the two screw seats 5. Due to the flexibility of the bellows 2, this tension forces the bellows 2 to bend in the direction of the internal threaded tube 7.

[0030] like Figures 2-7 As shown, an annular mounting bracket 101 is integrally formed on the outer wall of each rigid pipe 1 near one end of the corrugated pipe 2. Multiple skeleton rod assemblies are arranged between two opposing annular mounting brackets 101. Each skeleton rod assembly includes a first skeleton rod 81 and a second skeleton rod 82. One end of the first skeleton rod 81 slides through one annular mounting bracket 101, and the second skeleton rod 82 slides through another annular mounting bracket 101. The first skeleton rod 81 and the second skeleton rod 82 are hinged to each other via a hinge shaft (e.g., ...). Figure 7 (As shown).

[0031] like Figure 2 and Figure 6 As shown, springs 12 are provided between the first skeleton rod 81 and the annular mounting bracket 101, and between the second skeleton rod 82 and the annular mounting bracket 101. The springs 12 are compression springs, which are used to provide a certain reaction force during bending and to assist in straightening during resetting.

[0032] like Figure 3 , Figure 4 and Figure 6 As shown, an annular mounting bracket 101 has an annular groove 1011. A gear ring 9 that can rotate freely along the trajectory of the annular groove 1011 is provided in the annular groove 1011 of one of the annular mounting brackets 101. A drive shaft 11 is rotatably provided on the annular mounting bracket 101 with the gear ring 9. A drive gear 10 is mounted on the drive shaft 11 and meshes with the gear ring 9. A driven gear 13 is slidably sleeved on the first skeleton rod 81 or the second skeleton rod 82 that slides through the annular mounting bracket 101 by means of a flat key connection. The driven gear 13 meshes with the gear ring 9 and can move relative to the first skeleton rod 81 or the second skeleton rod 82. When it is necessary to bend the bellows 2 toward the internally threaded pipe 7, the operator rotates the drive shaft 11, which drives the gear ring 9 to rotate through the drive gear 10. The gear ring 9 then drives the driven gear 13 to rotate, thereby forcing the first skeleton rod 81 and the second skeleton rod 82 to rotate on the annular mounting bracket 101, so that their hinge points face the inside of the bend.

[0033] When it is necessary to adjust the bending direction of the cable protection pipe, pull out the fixing pin 31 in the desired bending direction, and rotate the connecting seat 4 upward by 90° around the hinge axis of the hinge hole 320, switching it from a horizontal storage state to a state perpendicular to the mounting seat 3. Then, insert the fixing pin 31 into the second pin hole 322 and through the connecting seat 4, keeping the connecting seat 4 vertically fixed. Next, rotate the external threaded rod 6 and the internal threaded tube 7 onto the screw seats 5 of the two opposite connecting seats 4. Rotate the external threaded rod 6 or the internal threaded tube 7, causing the external threaded rod 6 to gradually screw into the inside of the internal threaded tube 7, increasing the threaded connection length. This forces the distance between the two opposite screw seats 5 to shorten, thereby causing the corrugated pipe 2 between the two rigid pipes 1 to bend in the direction pointed by the internal threaded tube 7.

[0034] During the bending process, to ensure that the second skeleton rod 82 can adaptively rotate with the bending angle of the bellows 2, the drive shaft 11 drives the drive gear 10 to rotate. The drive gear 10 drives the gear ring 9 to rotate along the trajectory of the annular groove 1011, and the gear ring 9 then drives the driven gear 13 meshing with it to rotate. The driven gear 13 drives the first skeleton rod 81 and the second skeleton rod 82 to rotate through a key connection, so that the rotation direction of the second skeleton rod 82 with respect to the first skeleton rod 81 is towards the internally threaded pipe 7. As the externally threaded rod 6 rotates towards the internally threaded pipe 7, the second skeleton rod 82 deflects synchronously towards the internally threaded pipe 7. The springs 12 on the first skeleton rod 81 and the second skeleton rod 82 deform accordingly, and the springs 12 farther away from the externally threaded rod 6 and the internally threaded pipe 7 have a greater degree of deformation to adapt to the bending curvature of different parts.

[0035] like Figure 1 and Figure 8 As shown, a removable or deployable protective pad 14 is fitted on the outside of the corrugated pipe 2. The protective pad 14 has a closed cavity filled with a hydraulic cementitious material. In this embodiment, the hydraulic cementitious material is rapid-hardening sulfoaluminate cement or magnesium phosphate cement. A water injection pipe 15 is provided on the protective pad 14, which communicates with the inner cavity of the protective pad 14. The water injection pipe 15 has a built-in one-way valve, allowing water to be injected into the inner cavity of the protective pad 14 only through the water injection pipe 15. This allows the water to react chemically with the hydraulic cementitious material, thereby hardening the protective pad 14.

[0036] Once the corrugated pipe 2 is bent into place in the desired direction, water is injected into the inner cavity of the protective pad 14 through the water injection pipe 15. The hydraulic cementitious material reacts with the water and hardens, forming a rigid protective layer on the outside of the corrugated pipe 2, thereby enhancing the structural stability.

[0037] Finally, unscrew the external threaded rod 6 and the internal threaded tube 7 and remove them from the screw seat 5. Then, pull out the fixing pin 31, and return the connecting seat 4 horizontally to the mounting seat 3. Insert the fixing pin 31 into the first pin hole 321 to lock the connecting seat 4 in its stored state.

[0038] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A direction-adjustable cable protection pipe, comprising a rigid pipe (1). A corrugated pipe (2) is disposed between two rigid pipes (1); Its features are, It also includes mounting bases (3), and mounting bases (3) are evenly spaced on the circumferential outer wall of the rigid pipe (1) near the corrugated pipe (2). Connecting seat (4) is rotatably mounted on mounting seat (3). Connecting seat (4) can be vertically fixed on mounting seat (3) or laid flat and stored in mounting seat (3). Screw seat (5) is rotatably set at the end of the connecting seat (4) away from the mounting seat (3); when the connecting seat (4) is perpendicular to the mounting seat (3), the screw seats (5) on the two opposite connecting seats (4) are respectively rotatably connected with an external thread rod (6) and an internal thread tube (7). The ends of the external thread rod (6) and the internal thread tube (7) away from the screw seat (5) are threaded together. Rotating the external thread rod (6) or the internal thread tube (7) causes the external thread rod (6) to be screwed into the inside of the internal thread tube (7) so that the bellows (2) bends in the direction of the internal thread tube (7).

2. The directional adjustable cable protection pipe according to claim 1, characterized in that, The mounting base (3) has a hinge hole (320). The hinge shaft of the connecting base (4) is rotatably set in the hinge hole (320). A first pin hole (321) and a second pin hole (322) are respectively arranged in the horizontal and vertical directions with the hinge hole (320) as the center. A fixing pin (31) is detachably set in the first pin hole (321) and the second pin hole (322). When the connecting base (4) is flat and stored in the mounting base (3), the fixing pin (31) is inserted into the first pin hole (321) and passes through the connecting base (4). When the connecting base (4) is perpendicular to the mounting base (3), the fixing pin (31) is inserted into the second pin hole (322) and passes through the connecting base (4).

3. The directional adjustable cable protection pipe according to claim 2, characterized in that, A right triangle is formed between the center points of the first pin hole (321), the second pin hole (322), and the hinge hole (320).

4. The directional adjustable cable protection pipe according to claim 1, characterized in that, The outer wall of the rigid pipe (1) near one end of the corrugated pipe (2) is provided with an annular mounting bracket (101) around its circumference. A skeleton rod group is provided between the annular mounting brackets (101). The skeleton rod group includes a first skeleton rod (81) slidably mounted on the annular mounting bracket (101) and a second skeleton rod (82) slidably mounted on another annular mounting bracket (101). The first skeleton rod (81) and the second skeleton rod (82) are hinged together.

5. The directional adjustable cable protection pipe according to claim 4, characterized in that, A spring (12) is provided between the ends of the first skeleton rod (81) and the second skeleton rod (82) that are far apart from each other and the annular mounting bracket (101).

6. The directional adjustable cable protection pipe according to claim 5, characterized in that, The annular mounting bracket (101) has an annular groove (1011) around its circumference. A gear ring (9) that can rotate along the trajectory of the annular groove (1011) is provided in the annular groove (1011) of the annular mounting bracket (101). A drive shaft (11) is rotatably provided on the annular mounting bracket (101). A drive gear (10) is installed on the drive shaft (11). The drive gear (10) meshes with the gear ring (9). A driven gear (13) is slidably provided on the first skeleton rod (81) or the second skeleton rod (82) that slides through the annular mounting bracket (101). The driven gear (13) meshes with the gear ring (9).

7. The directional adjustable cable protection pipe according to claim 1, characterized in that, A protective pad (14) is provided on the outside of the bellows (2).

8. The directional adjustable cable protection pipe according to claim 7, characterized in that, The inner cavity of the protective pad (14) is provided with hydraulic cementitious material, and a water injection pipe (15) is provided on the protective pad (14), which is connected to the inner cavity of the protective pad (14).

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