A U-shaped anchor for steel wire ropes used in power transmission line engineering

Abstract

This utility model discloses a U-shaped steel wire rope anchor for power transmission line engineering, comprising an anchor body in the shape of a U, including left and right wing plates, with pin holes at the lower ends of the wing plates for engaging with a pin shaft; a first limiting member is provided on the side of the left and / or right wing plate that engages with an expanding roller; a pin shaft, which is disposed in the pin hole; and an expanding roller, which is disposed inside the open end of the anchor body and sleeved outside the pin shaft to increase the winding radius of the steel wire rope. A second limiting member is provided at a position corresponding to the expanding roller and the first limiting member, and the first and second limiting members cooperate to restrict the expansion roller from rotating around its own axis of rotation. This utility model increases the bending radius of the steel wire rope by using an extended expanding roller sleeved outside the pin shaft, thus reducing the decrease in tensile strength caused by bending of the steel wire rope.

Description

Technical Field

[0001] This utility model relates to the field of anchoring technology, and in particular to a U-shaped steel wire rope anchor for power transmission line engineering. Background Technology

[0002] Anchoring various specifications of load-bearing steel wire ropes is a frequent construction operation during power transmission line construction, such as... Figure 1 As shown, the traditional method is to connect the ground anchor rope loop 1 directly to the stressed steel wire rope 3 through the U-shaped ring 2.

[0003] However, this method has two drawbacks: it damages the wire rope and reduces its service life. First, because the pin diameter of the U-shaped ring 2 is small, the bending radius of the wire rope 3 is too small, which will cause the wire rope 3 to bend excessively and damage the wire rope, such as causing single wire breakage, deformation, strand skipping, and loosening. Second, the wire rope only has half a turn of contact with the pin of the U-shaped ring, which can only provide a small friction force, so the tail rope of the wire rope 3 still has a large tension. Using the traditional wire rope clip 4 to fix the tail rope of the wire rope 3 poses a safety risk of wire rope slippage. Utility Model Content

[0004] To address the problems in the prior art, this utility model provides a U-shaped anchor for steel wire ropes used in power transmission line engineering.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A U-shaped steel wire rope anchor for power transmission line engineering, comprising:

[0007] The anchor body is U-shaped and includes left and right wing plates. The lower ends of the left and right wing plates are provided with pin holes that cooperate with the pin shaft. The left and / or right wing plates are provided with a first limiting member on the side that cooperates with the expansion roller.

[0008] A pin, wherein the pin is disposed in a pin hole;

[0009] An expanding roller is provided inside the open end of the anchor body and sleeved on the outside of the pin shaft to increase the winding radius of the wire rope. A second limiting member is provided at the corresponding position of the expanding roller and the first limiting member. The first limiting member and the second limiting member cooperate to restrict the expanding roller from rotating around its own rotation axis.

[0010] Preferably, the expansion roller has a cylindrical section in the middle and protrusions on both sides to restrict the wire rope wound on the expansion roller from sliding to the outside of the expansion roller.

[0011] Preferably, the protrusions on both sides of the expanding roller are frustums, the frustums are coaxial with the cylindrical section in the middle of the expanding roller, and the small diameter end of the frustum is connected to the cylindrical section.

[0012] Preferably, the left and right widths D of the cylindrical section and the diameter d of the wire rope satisfy the following relationship: D ≥ 3d.

[0013] Preferably, the first limiting member is a boss with a rectangular longitudinal section, and the boss is disposed at the upper end of the pin hole and arranged radially.

[0014] The second limiting element is a second groove, which is provided on the end face of the expanding roller. The second groove extends radially from the outer circumferential edge of the end face of the expanding roller towards the center.

[0015] Preferably, the pin hole includes a first pin hole provided on the lower part of the left wing plate and a second pin hole provided on the lower part of the right wing plate. The first pin hole and the second pin hole are coaxially arranged. The first pin hole is a smooth round hole, and the second pin hole is threaded. The right end of the pin shaft is threadedly connected to the second pin hole.

[0016] Preferably, the expansion roller has a through hole at its central axis, the through hole has a circular longitudinal section, and the through hole and the optical axis section of the pin are clearance-fitted.

[0017] The beneficial effects of this utility model are:

[0018] 1. By installing an expansion roller around the pin, the bending radius of the wire rope during winding is increased compared to the traditional pin winding method, reducing bending damage, minimizing the decrease in tensile strength caused by bending, improving the safety and lifespan of the wire rope during use, and ensuring the safety of the project.

[0019] 2. The anchor body, expansion roller, and pin are wider than the traditional U-shaped ring. The boss and the second groove work together to restrict the rotation of the expansion roller, so that the wire rope can be wrapped around the expansion roller several times before the tail rope is fixed. This increases the friction and reduces the tension of the tail rope, making the tail rope more secure.

[0020] 3. The truncated cones at both ends of the expanding roller are used to limit the steel wire rope wound on the expanding roller from sliding to the outside of the expanding roller, ensuring that the bending radius of the steel wire rope always meets the preset value during use; in addition, the truncated cones at both ends of the expanding roller can also prevent the edges of the two ends of the expanding roller from contacting the steel wire rope, preventing the steel wire rope from being cut by the edge of the expanding roller, and protecting the safety of the steel wire rope during use. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the connection relationship between the U-shaped ring connecting the steel wire rope and the ground anchor rope in the existing technology;

[0022] Figure 2 This is a schematic diagram showing the connection relationship between the connecting steel wire rope and the ground anchor rope sleeve of this utility model;

[0023] Figure 3 This is a front view of the present invention;

[0024] Figure 4 This is a schematic diagram showing the connection relationship between the anchor body and the pin in this utility model;

[0025] Figure 5 yes Figure 4 Enlarged view of point A in the middle;

[0026] Figure 6 This is a three-dimensional structural diagram of the front of the anchor body in this utility model;

[0027] Figure 7 This is a front three-dimensional structural diagram of the expansion roller in this utility model.

[0028] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0030] like Figures 2-7 As shown, a U-shaped steel wire rope anchor for power transmission line engineering includes an anchor body 51, an expansion roller 53, and a pin 52.

[0031] The anchor body 51 is U-shaped and includes left and right wing plates 511. The lower end of the left and right wing plates 511 is provided with pin holes that cooperate with the pin shaft 52. The left and / or right wing plates 511 are provided with a first limiting member on the side that cooperates with the expansion roller 53.

[0032] To facilitate the assembly of the expansion roller 53, in this embodiment, the first limiting member is a boss 513. The boss 513 has a rectangular longitudinal section and is located at the upper end of the pin hole 512 and arranged radially.

[0033] In order to facilitate connection with the pin 52, in this embodiment, the pin hole includes a first pin hole 514 provided on the lower part of the left wing plate 511 and a second pin hole 512 provided on the lower part of the right wing plate 511. The first pin hole 514 and the second pin hole 512 are coaxially arranged. The first pin hole 514 is a smooth round hole and the second pin hole 512 is provided with threads.

[0034] In order to enable the wire rope to be continuously wound around the axial direction of the expansion roller 53 for ≥2 turns, preferably 3 turns, in this embodiment, the wing plates 511 on both sides of the anchor body 51 are symmetrically expanded in the left and right direction compared with the traditional anchor. The width W between the wing plates 511 on both sides is increased by 150%-300% compared with the traditional standard anchor. The width W between the wing plates 511 on both sides and the wire rope diameter d satisfy the relationship: W > 3d.

[0035] The pin 52 is set in the pin hole. The optical axis section of the pin 52 is longer than that of the traditional pin used in anchors. The right end of the pin 52 is threaded to the second pin hole 512. In order to adapt to the anchor body 51, in this embodiment, the length L of the optical axis section is increased by 150%-300% compared with the standard pin, and the length L of the optical axis section and the diameter d of the wire rope satisfy the relationship: L > 3d.

[0036] An expanding roller 53 is disposed inside the open end of the anchor body 51 and sleeved on the outside of the pin 52. The middle of the expanding roller 53 is a cylindrical section 531, which is used to increase the winding radius of the wire rope and reduce the loss of tensile strength caused by excessive bending of the wire rope. The two sides of the expanding roller 53 are protrusions, which are used to restrict the wire rope wound on the expanding roller 53 from sliding to the outside of the expanding roller 53. A second limiting member is provided at the position corresponding to the first limiting member of the expanding roller 53. The first limiting member and the second limiting member cooperate to restrict the expanding roller 53 from rotating around its own rotation axis. In this embodiment, the second limiting member is a second groove 532 provided on the left and right end faces of the expanding roller 53. The second groove 532 extends radially from the outer circumferential edge of the end face of the expanding roller 53 towards the center, forming the second limiting member. The second groove 532 and the boss 513 are in clearance fit.

[0037] In this embodiment, the protrusions on both sides of the expanding roller 53 are frustums 534. The frustums 534 and the cylindrical section 531 are coaxial, and the small diameter end of the frustums 534 is connected to the cylindrical section 531.

[0038] In order to balance the bending radius of the wire rope, the difficulty of assembly and the cost, in this embodiment, the specifications of the anchoring wire rope used in general transmission lines are φ14-φ18, the theoretical minimum value of the wire rope bending coefficient k=3.5 (the wire rope strength is retained at 80%), and the radius R of the cylindrical section 531 is calculated to be ≥65mm based on the most unfavorable rope diameter φ18.

[0039] To facilitate the mounting of the expansion roller 53 on the outside of the pin 52, a through hole 533 is provided at the central axis of the expansion roller 53. The longitudinal section of the through hole 533 is circular, and the through hole 533 and the pin 52 are fitted with a clearance.

[0040] In order to enable the wire rope to be continuously wound around the cylindrical section 531 around the expansion roller 53 axially for ≥2 turns, preferably 3 turns, in this embodiment, the left and right width D of the cylindrical section 531 and the wire rope diameter d satisfy the relationship: D ≥ 3d.

[0041] The working principle of this utility model is as follows:

[0042] First, insert the open end of the lower end of the anchor body 51 onto both sides of the expanding roller 53 and slide the boss 513 into the second groove 532 so that the second groove 532 and the boss 513 fit together; then, align the central axis of the through hole 533 of the expanding roller 53 with the central axis of the pin hole of the anchor body 51, insert the pin 52 and screw the right end of the pin 52 into the second pin hole 512 so that the expanding roller 53 is fixed at the lower end of the anchor body 51; finally, after winding the wire rope around the cylindrical section 531 of the expanding roller 53 three times, use the wire rope clip 4 to fix the end of the wire rope.

[0043] The above embodiments are only used to illustrate and not limit the technical solutions of this utility model. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the utility model without departing from the spirit and scope of the utility model. Any modifications or partial substitutions should be covered within the scope of the claims of this utility model.

[0044] If the terms "first" or "second" are used in this document to define the components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing this utility model and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0045] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0046] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0047] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A U-shaped anchor for steel wire ropes used in power transmission line engineering, characterized in that, include: The anchor body is U-shaped and includes left and right wing plates. The lower ends of the left and right wing plates are provided with pin holes that cooperate with the pin shaft. The left and / or right wing plates are provided with a first limiting member on the side that cooperates with the expansion roller. A pin, wherein the pin is disposed in a pin hole; An expanding roller is provided inside the open end of the anchor body and sleeved on the outside of the pin shaft to increase the winding radius of the wire rope. A second limiting member is provided at the corresponding position of the expanding roller and the first limiting member. The first limiting member and the second limiting member cooperate to restrict the expanding roller from rotating around its own rotation axis.

2. The U-shaped steel wire rope anchor for power transmission line engineering as described in claim 1, characterized in that, The expansion roller has a cylindrical section in the middle, and protrusions are provided on both sides of the expansion roller to prevent the steel wire rope wound on the expansion roller from sliding to the outside of the expansion roller.

3. The U-shaped steel wire rope anchor for power transmission line engineering as described in claim 2, characterized in that, The protrusions on both sides of the expanding roller are truncated cones, and the truncated cones and the cylindrical section in the middle of the expanding roller are coaxial, with the small diameter end of the truncated cones connected to the cylindrical section.

4. The U-shaped steel wire rope anchor for power transmission line engineering as described in claim 2, characterized in that, The width D of the cylindrical section and the diameter d of the wire rope satisfy the following relationship: D ≥ 3d.

5. The U-shaped steel wire rope anchor for power transmission line engineering as described in claim 1, characterized in that, The first limiting member is a boss with a rectangular longitudinal section. The boss is located at the upper end of the pin hole and is arranged radially. The second limiting element is the second groove, which is provided on the end face of the expanding roller. The second groove extends radially from the outer circumferential edge of the end face of the expanding roller towards the center.

6. The U-shaped steel wire rope anchor for power transmission line engineering as described in claim 1, characterized in that, The pin hole includes a first pin hole provided on the lower part of the left wing plate and a second pin hole provided on the lower part of the right wing plate. The first pin hole and the second pin hole are coaxially arranged. The first pin hole is a smooth round hole, and the second pin hole is threaded. The right end of the pin shaft is threadedly connected to the second pin hole.

7. The U-shaped steel wire rope anchor for power transmission line engineering as described in claim 1, characterized in that, The expansion roller has a through hole at its central axis. The through hole has a circular longitudinal section and is clearance-fitted with the optical axis section of the pin.

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