External cable steering gear

Abstract

The utility model relates to an external cable steering gear which comprises an embedded pipe arranged in a concrete foundation, the embedded pipe deviates in the concrete foundation, a steering block is arranged on the inner wall of the upper end of the embedded pipe in a sleeved mode, a plurality of vertically-through installation holes are formed in the steering block, and a plurality of damping pipes are arranged in the installation holes in a sleeved mode in a one-to-one correspondence mode. A plurality of steel strands penetrate through the damping pipes in a one-to-one correspondence mode, the steel strands penetrating out of the damping pipes extend downwards and penetrate out of the embedded pipe, the cylindrical face of the outer wall of the steering block is arranged to be a steering conical face with the middle protruding outwards and the upper end and the lower end gradually recessed inwards, and the protruding position of the steering conical face is attached to the inner wall of the embedded pipe. The two ends of the steering conical surface are in clearance fit with the inner wall of the embedded pipe, upper and lower openings of the inner wall of the steering block are open and provided with chamfers, and the steel strand is in clearance fit with the chamfers of the steering block. According to the utility model, wrinkles and fractures of the steel strand after the wind power embedded pipe is embedded in a deviated manner can be effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of prestressed anchoring technology, specifically to an external cable steering device. Background Technology

[0002] Steel strand cable anchorage structures include stay cables, suspender cables, external cables, main cables of suspension bridges, and anchor cables. To meet the requirements of structural layout and stress, some anchorage structures will design the cable line as a curve, such as external cables and main cables of suspension bridges. This requires the anchorage section to have a turning function.

[0003] In existing technologies, it is difficult to handle the problem of misaligned pre-buried pipes in wind power projects. When tensioning occurs at the pipe opening, the PE layer of the steel strands can be squeezed and blocked at the pre-buried pipe opening, resulting in wrinkles or breakage, which affects the corrosion resistance. The restraining rubber is deformed by the compression of the steel strands, and may eventually collapse and cause the steel pipe to rub against the steel strands, leading to breakage. Therefore, it is necessary to design an external cable steering mechanism to solve the problems in existing technologies. Utility Model Content

[0004] To address the problems in the background technology, this utility model proposes an external cable steering device, which can effectively reduce the wrinkles and breaks of steel strands after the wind power pre-buried pipe is misaligned.

[0005] To solve the above problems, this utility model adopts the following technical solution: an external cable steering device, including a pre-embedded pipe placed in a concrete foundation, the pre-embedded pipe being offset within the concrete foundation, a steering block being sleeved on the upper inner wall of the pre-embedded pipe, the steering block having multiple vertically penetrating mounting holes, multiple shock-absorbing tubes being correspondingly sleeved in the multiple mounting holes, the multiple shock-absorbing tubes being used to pass through multiple steel strands correspondingly, the steel strands passing through the shock-absorbing tubes extending downwards and passing through the pre-embedded pipe, the outer cylindrical surface of the steering block being set as a steering cone surface with a convex center and gradually concave upper and lower ends, the convex part of the steering cone surface fitting against the inner wall of the pre-embedded pipe, the two ends of the steering cone surface being clearance-fitted with the inner wall of the pre-embedded pipe, the upper and lower openings of the inner wall of the steering block being open and chamfered, the steel strands being clearance-fitted with the chamfered parts of the steering block.

[0006] Furthermore, the upper end of the pre-embedded pipe extends out of the concrete foundation, and the upper end of the steering block forms a downward-bent annular flange. An annular cavity is formed between the annular flange and the outer wall of the steering block. The upper end of the pre-embedded pipe is inserted into the annular cavity, and there is a gap between the outer wall of the pre-embedded pipe and the side wall of the annular cavity.

[0007] Furthermore, pressure plates are detachably provided at both the upper and lower ends of the steering block, and multiple through holes are provided on the two pressure plates corresponding to the multiple mounting holes for the steel strands to pass through one by one.

[0008] Furthermore, the end faces of the two pressure plates are provided with a plurality of countersunk through holes evenly spaced along the circumference. The upper and lower end faces of the steering block are provided with threaded holes corresponding to the plurality of countersunk through holes. A plurality of countersunk bolts are inserted into the plurality of countersunk through holes of the two pressure plates one by one, and the plurality of countersunk bolts are connected to the plurality of threaded holes one by one.

[0009] Furthermore, both pressure plates are made of polyethylene plastic.

[0010] Furthermore, all of the aforementioned shock-absorbing tubes are made of polyurethane.

[0011] Furthermore, each of the steel strands is fitted with a sheath.

[0012] The beneficial effects of this utility model are as follows: By providing a steering cone surface on the outer cylindrical surface of the steering block, the steering block can actively deflect in the direction of the pre-embedded pipe after it is misaligned, ensuring that the steering block always provides stable support for the steel strand. Furthermore, the chamfering treatment at the pipe openings at the upper and lower ends of the steering block further reduces the risk of wrinkles and breakage of the steel strand's PE layer due to compression at the pipe opening during tensioning, which affects corrosion resistance. It also avoids the risk of the restraining rubber being deformed by the steel strand, potentially leading to long-term crushing and wear of the steel pipe until it breaks. This utility model effectively reduces wrinkles and breakage of the steel strand after the pre-embedded pipe of the wind power plant is misaligned. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a cross-sectional view of the present invention;

[0015] Figure 2 for Figure 1 A magnified view of a portion of point I;

[0016] Figure 3 This is a partially enlarged top view of the present invention.

[0017] 1. Concrete foundation; 2. Embedded pipe; 3. Steering block; 4. Mounting hole; 5. Shock absorber pipe; 6. Steel strand; 7. Steering cone surface; 8. Chamfer; 9. Circular flange; 10. Circular cavity; 11. Pressure plate; 12. Countersunk bolt. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] This invention features a steering cone surface 7 on the outer cylindrical surface of the steering block 3. After the pre-embedded pipe 2 is misaligned, the steering block 3 can actively deflect in the direction of the misalignment, ensuring stable support for the steel strand 6. Furthermore, chamfering 8 is applied to the pipe openings at the upper and lower ends of the steering block 3. Compared to existing technologies that prevent the PE layer of the steel strand 6 from being squeezed and blocked at the pipe opening during tensioning, thus avoiding wrinkles or breakage and affecting corrosion resistance, and that constrained rubber from being deformed by the steel strand 6, potentially leading to long-term crushing and breakage of the steel strand 6 due to wear, this invention effectively reduces wrinkles and breakage of the steel strand 6 after misalignment of the wind power pre-embedded pipe 2.

[0020] Specifically, such as Figures 1 to 3 As shown, an external cable steering device includes an embedded pipe 2 placed in a concrete foundation 1. The embedded pipe 2 is offset within the concrete foundation. A steering block 3 is fitted on the upper inner wall of the embedded pipe 2. The steering block 3 has multiple vertically penetrating mounting holes 4. Multiple damping pipes 5 are fitted one-to-one in the multiple mounting holes 4. Multiple steel strands 6 are threaded through the multiple damping pipes 5 one-to-one. The steel strands 6 that pass through the damping pipes 5 extend downward and pass through the embedded pipe 2. The outer cylindrical surface of the steering block 3 is set as a steering cone surface 7 that is convex in the middle and gradually concave at the upper and lower ends. The convex part of the steering cone surface 7 fits against the inner wall of the embedded pipe 2. The two ends of the steering cone surface 7 are clearance-fitted with the inner wall of the embedded pipe 2. The upper and lower openings of the inner wall of the steering block 3 are both open and have chamfers 8. The steel strands 6 are clearance-fitted with the chamfers 8 of the steering block 3.

[0021] Furthermore, the upper end of the pre-embedded pipe 2 extends out of the concrete foundation 1, and the upper end of the steering block 3 forms a downwardly bent annular flange 9. An annular cavity 10 is formed between the annular flange 9 and the outer wall of the steering block 3. The upper end of the pre-embedded pipe 2 is inserted into the annular cavity 10, and there is a gap between the outer wall of the pre-embedded pipe 2 and the side wall of the annular cavity 10.

[0022] Furthermore, pressure plates 11 are detachably provided at both the upper and lower ends of the steering block 3, and multiple through holes are provided on the two pressure plates 11 corresponding to the multiple mounting holes 4 for the steel strands 6 to pass through one by one.

[0023] Furthermore, the end faces of the two pressure plates 11 are evenly spaced around the circumference with multiple countersunk through holes, and the upper and lower end faces of the steering block 3 are provided with threaded holes corresponding to the multiple countersunk through holes. Multiple countersunk bolts 12 are inserted into the multiple countersunk through holes of the two pressure plates 11, and the multiple countersunk bolts 12 are connected to the multiple threaded holes.

[0024] Furthermore, both pressure plates 11 are made of polyethylene plastic.

[0025] Furthermore, all of the aforementioned shock-absorbing tubes 5 are made of polyurethane.

[0026] Furthermore, each of the steel strands 6 is fitted with a sheath.

[0027] This invention features a steering cone surface 7 on the outer cylindrical surface of the steering block 3. After the pre-embedded pipe 2 is misaligned, the steering block 3 can actively deflect in the direction of the misalignment, ensuring stable support for the steel strand 6. Furthermore, chamfering 8 is applied to the pipe openings at the upper and lower ends of the steering block 3. Compared to existing technologies that prevent the PE layer of the steel strand 6 from being squeezed and blocked at the pipe opening during tensioning, thus avoiding wrinkles or breakage and affecting corrosion resistance, and that constrained rubber from being deformed by the steel strand 6, potentially leading to long-term crushing and breakage of the steel strand 6 due to wear, this invention effectively reduces wrinkles and breakage of the steel strand 6 after misalignment of the wind power pre-embedded pipe 2.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An in-vitro chordae tendinae deflector comprising a pre-embedded tube (2) placed inside a concrete foundation (1), said pre-embedded tube (2) creating a deviation inside the concrete foundation (1), characterized in that, The upper end inner wall of the embedded pipe (2) is sleeved with a turning block (3), a plurality of upper and lower through installation holes (4) are formed in the turning block (3), a plurality of damping pipes (5) are sleeved in the installation holes (4) one by one, a plurality of steel wires (6) are arranged in the damping pipes (5) one by one, the steel wires (6) extending out of the damping pipes (5) extend downward and out of the embedded pipe (2), the outer wall of the turning block (3) is provided with a turning cone surface (7) which is convex in the middle and concave at both ends, the convex part of the turning cone surface (7) is attached to the inner wall of the embedded pipe (2), the both ends of the turning cone surface (7) are gap-fitted with the inner wall of the embedded pipe (2), the inner wall of the turning block (3) is provided with chamfers (8) at the upper and lower openings, and the steel wires (6) are gap-fitted with the chamfers (8) of the turning block (3).

2. An in-vitro chordae suture converter according to claim 1, wherein: The upper end of the embedded pipe (2) extends out of the concrete foundation (1), the upper end of the turning block (3) is formed with a downwardly bent annular flange (9), an annular accommodation cavity (10) is formed between the outer wall of the turning block (3) and the annular flange (9), the upper end of the embedded pipe (2) is inserted into the annular accommodation cavity (10), and the outer wall of the embedded pipe (2) is gap-fitted with the side wall of the annular accommodation cavity (10).

3. An in-vitro chordae suture converter according to claim 1, wherein: The upper and lower ends of the turning block (3) are detachably provided with pressing plates (11), a plurality of through holes are formed in the pressing plates (11) corresponding to the installation holes (4) for the steel wires (6) to pass through.

4. An in-vitro chordae suture converter according to claim 3, wherein: A plurality of countersunk through holes are uniformly and circumferentially formed in the end faces of the two pressing plates (11), a plurality of threaded holes are formed in the upper and lower end faces of the turning block (3) corresponding to the countersunk through holes, a plurality of countersunk bolts (12) are arranged in the countersunk through holes of the two pressing plates (11) one by one, and the countersunk bolts (12) are connected to the threaded holes one by one.

5. An in-vitro chordae suture re-directing device according to claim 3, wherein: The materials of the two pressing plates (11) are polyethylene plastic.

6. An in-vitro chordae suture converter according to claim 1, wherein: The materials of the plurality of damping pipes (5) are polyurethane.

7. An in-vitro cable steerer according to any one of claims 1 to 6, wherein: A sheath is sleeved on each of the plurality of steel wires (6). A sheath is sleeved on each of the plurality of steel wires (6).

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