Power transmission tower leg replacement structure and method

Abstract

The invention discloses a power transmission tower leg replacement structure and method, and relates to the technical field of power transmission tower structure engineering.The power transmission tower leg replacement structure comprises a mooring rope and three spiral anchor structures arranged in the circumferential direction of a to-be-replaced tower leg, and each spiral anchor structure comprises an anchor rod and a fixed pulley arranged at the top of the anchor rod; the two ends of the mooring rope are connected with a connecting piece located above a to-be-replaced part of the tower leg and the ground respectively, the mooring rope passes through the fixed pulley, the fixed pulley is higher than the connecting piece, and when the to-be-replaced tower leg needs to be replaced, the mooring rope is connected with the connecting piece, and the connecting piece is connected with the mooring rope. And the cable is tightened, so that the tower leg is supported by the cable, stable support is applied to the tower leg, the non-replaced tower leg and the to-be-replaced tower leg are completely separated, the whole to-be-replaced tower leg can be replaced, replacement of the tower leg can be achieved only through the spiral anchor structure and the cable, and more manpower and construction difficulty are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission tower structures, and particularly to a replacement structure and method for a transmission tower leg. Background Art

[0002] Metal component deterioration occurs in transmission towers that are long-term exposed to the atmospheric environment (including precipitation, temperature changes, and weathering), especially for the differential corrosion problem existing in the bottom connectors of the load-bearing structure. Such load-bearing components usually exhibit a segmented exposure characteristic: their lower sections are in contact with the geological layer, and the upper interfaces are directly exposed to the atmospheric medium. This special working condition causes the interface transition area to become a high-risk area for material performance attenuation. Therefore, it is necessary to replace the lower structure of the transmission tower leg. The existing replacement structures for transmission tower legs can only replace the connecting components of the legs, such as bolts, and cannot replace the entire leg.

[0003] Therefore, it is necessary to develop and design a replacement structure and method for a transmission tower leg, which can ensure stable support for the upper structure of the leg to be replaced, completely separate the non-replaced leg and the leg to be replaced, and realize the replacement of the entire leg to be replaced. This is an urgent technical problem that needs to be solved by those skilled in the art at present. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a replacement structure and method for a transmission tower leg, which can ensure stable support for the upper structure of the leg to be replaced, completely separate the non-replaced leg and the leg to be replaced, and realize the replacement of the entire leg to be replaced.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] A replacement structure for a transmission tower leg includes a cable and three screw anchor structures arranged circumferentially around the leg to be replaced. The screw anchor structure includes an anchor rod and a fixed pulley provided at the top of the anchor rod. The two ends of the cable are respectively connected to a connecting member above the part of the leg to be replaced and the ground. The cable passes through the fixed pulley, and the height of the fixed pulley is higher than that of the connecting member.

[0007] Preferably, it further includes a fastening structure arranged between adjacent anchor rods. The fastening structure includes an upper chord and a lower chord that are arranged in parallel and perpendicular to the anchor rod, and a first diagonal rod and a second diagonal rod that are arranged alternately and connected to the ends of the upper chord and the lower chord respectively.

[0008] Preferably, through holes are sequentially arranged at intervals from top to bottom on the anchor rod, and the ends of the upper chord, the lower chord, the first diagonal rod, and the second diagonal rod are all arranged in the through holes.

[0009] Preferably, the connecting member is a hoop clamped on the tower leg, and a first connection hole for connecting the cable is provided on the hoop.

[0010] Preferably, the connecting member is a flange. The tower leg includes a non-replaceable tower leg, a tower leg to be replaced located below the non-replaceable tower leg, and the flange for connecting the non-replaceable tower leg and the tower leg to be replaced. The cable is connected to a second connection hole provided on the flange.

[0011] Preferably, the mating end of the anchor rod with the ground is provided with an external thread.

[0012] Preferably, the three anchor rods are arranged in a triangle, and the contact point of the tower leg with the ground is located at the center of the triangle.

[0013] Preferably, the diameter of the anchor rod is equal to the diameter of the tower leg.

[0014] Preferably, the cable is fixed to the ground by anchor nails.

[0015] The present invention also discloses a method for replacing a tower leg of a transmission tower, which applies the above-mentioned transmission tower leg replacement structure and includes the following steps:

[0016] A screw anchor structure is arranged circumferentially around the tower leg to be replaced, and a fastening structure is additionally provided on the adjacent screw anchor structures;

[0017] The cable passes through the upper end of the screw anchor structure. One end of the cable is connected to the flange of the tower leg, and the other end of the cable is fixed to the ground to tension the tower leg to be replaced;

[0018] Remove the tower leg to be replaced and install a new tower leg;

[0019] Remove the tower leg replacement structure.

[0020] The present invention has achieved the following technical effects compared with the prior art:

[0021] Since the height of the fixed pulley is higher than the height of the connecting member, when the tower leg to be replaced needs to be replaced, the cable is connected to the connecting member and the cable is tightened, so that the cable supports the tower leg, applies stable support to the tower leg, and completely separates the non-replaceable tower leg and the tower leg to be replaced. The entire tower leg to be replaced can be replaced, and the replacement of the tower leg can be achieved only through the screw anchor structure and the cable, reducing a large amount of labor and construction difficulty. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Appendix Figure 1 FIG.

[0024] Appendix Figure 2 FIG. is a schematic structural diagram of the front view of the transmission tower leg replacement structure disclosed in the present invention;

[0025] Appendix Figure 3 FIG. is a schematic structural diagram of the top view of the transmission tower leg replacement structure disclosed in the present invention;

[0026] Appendix Figure 4 FIG. is a schematic structural diagram of the tower leg of the transmission tower leg replacement structure disclosed in the present invention;

[0027] Appendix Figure 5 FIG. is a schematic structural diagram of the anchor rod of the transmission tower leg replacement structure disclosed in the present invention;

[0028] Wherein, 1, the first screw anchor structure; 11, the first cable; 12, the first fixed pulley; 13, the first anchor rod; 2, the second screw anchor structure; 21, the second cable; 22, the second fixed pulley; 23, the second anchor rod; 24, the second anchor nail; 25, the external thread; 3, the third screw anchor structure; 31, the third cable; 32, the third fixed pulley; 33, the third anchor rod; 34, the third anchor nail; 4, the tower leg; 41, the non-replacement tower leg; 42, the flange; 43, the tower leg to be replaced; 5, the fastening structure; 51, the first fastening structure; 511, the upper chord; 512, the first diagonal rod; 513, the second diagonal rod; 514, the lower chord; 52, the second fastening structure; 53, the third fastening structure. Detailed implementation manners

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0030] In the description of the invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0031] The object of the present invention is to provide a transmission tower leg replacement structure and method, which can ensure stable support for the upper structure of the leg to be replaced, completely separate the non-replaced leg and the leg to be replaced, and realize the replacement of the entire leg to be replaced.

[0032] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0033] Reference Figure 1 and Figure 2 In the transmission tower leg replacement structure disclosed in the embodiments of the present invention, at least three screw anchor structures are provided on the circumference of the leg 43 to be replaced, and a cable for pulling the leg 4 tight. The screw anchor structure includes an anchor rod and a fixed pulley provided at the top of the anchor rod. One end of the cable is connected to a connecting member above the leg 43 to be replaced, and the other end of the cable passes through the fixed pulley and is connected to the ground. The height of the fixed pulley is higher than that of the connecting member. By the height of the fixed pulley being higher than that of the connecting member, when the leg 43 to be replaced needs to be replaced, the cable is connected to the connecting member and the cable is tightened, so that the cable supports the leg 4, that is, the force exerted by the cable on the leg 4 is a supporting force, to stably support the leg 4, completely separate the non-replaced leg 41 and the leg 43 to be replaced, and the entire leg 41 to be replaced can be replaced, and the replacement of the leg 4 can be achieved only by the screw anchor structure and the cable, reducing a lot of manpower and construction difficulty.

[0034] It should be noted that the diameter of the cable is half of the diameter of the leg 4. The three screw anchor structures are the first screw anchor structure 1, the second screw anchor structure 2 and the third screw anchor structure 3 respectively. The three screw rods are the first anchor rod 13, the second anchor rod 23 and the third anchor rod 33 respectively. The three anchor rods are evenly arranged on the circumference of the leg 43 to be replaced. A first fixed pulley 12 is provided on the first anchor rod 13, and a first cable 11 is provided on the first fixed pulley 12. A second fixed pulley 22 is provided on the second anchor rod 23, and a second cable 21 is provided on the second fixed pulley 22. A third fixed pulley 32 is provided on the third anchor rod 33, and a third cable 31 is provided on the third fixed pulley 32.

[0035] Reference Figure 1 and Figure 2, in one embodiment, the transmission tower leg replacement structure further includes a fastening structure 5 disposed between adjacent anchor rods, that is, a first fastening structure 51 is disposed between the first anchor rod 13 and the second anchor rod 23, a second fastening structure 52 is disposed between the second anchor rod 23 and the third anchor rod 33, and a third fastening structure 53 is disposed between the third anchor rod 33 and the first anchor rod 13. The first fastening structure 51, the second fastening structure 52, and the third fastening structure 53 each include an upper chord 511 and a lower chord 514 that are arranged in parallel and are respectively perpendicular to the first anchor rod 13, the second anchor rod 23, and the third anchor rod 33, and a first diagonal rod 512 and a second diagonal rod 513 that are arranged in an interleaved manner and are respectively connected to the ends of the upper chord 511 and the lower chord 514. A stable triangular truss unit is formed by the combination of the chords and the diagonal rods, enhancing the lateral binding force between adjacent anchor rods, preventing the anchor rods from displacing or deforming due to uneven stress, and through the rigid grid structure formed by the chords and the diagonal rods, enhancing the synergy between adjacent anchor rods to ensure the stability of the foundation connection during the replacement of the tower leg 4.

[0036] Reference Figure 1 and Figure 2 , as a preferred method, through holes are sequentially arranged at intervals from top to bottom on the first anchor rod 13, the second anchor rod 23, and the third anchor rod 33. The ends of the upper chord 511, the lower chord 514, the first diagonal rod 512, and the second diagonal rod 513 are all arranged in the through holes. By arranging a plurality of through holes on the first anchor rod 13, the second anchor rod 23, and the third anchor rod 33, the connection positions of the upper chord 511 and the lower chord 514 with the through holes can be adjusted according to different terrains, ensuring that the upper chord 511 and the lower chord 514 are perpendicular to the first anchor rod 13, the second anchor rod 23, and the third anchor rod 33, and improving the stability of the connection structure.

[0037] It should be noted that the through holes are bolt holes, and the ends of the upper chord 511, the lower chord 514, the first diagonal rod 512, and the second diagonal rod 513 are all provided with external threads that cooperate with the bolt holes.

[0038] Reference Figure 1 and Figure 2 , in one embodiment, the connecting member is a hoop clamped on the tower leg 4, and the hoop is provided with first connection holes for connecting the first cable 11, the second cable 21, and the third cable 31. By providing the hoop, it is convenient to connect the cables to the tower leg 4.

[0039] Reference Figure 1 and Figure 2, As a preferred embodiment, the connecting member is a flange 42. The tower leg 4 includes a non-replaceable tower leg 41, a tower leg 43 to be replaced located below the non-replaceable tower leg 41, and a flange 42 for connecting the non-replaceable tower leg 41 and the tower leg 43 to be replaced. The cable is connected to the second connection hole provided on the flange 42, and the non-replaceable tower leg 41 and the tower leg 43 to be replaced are connected through the flange 42, which facilitates the replacement of the tower leg 4.

[0040] Reference Figure 1 and Figure 2 , As a preferred embodiment, the mating ends of the first anchor rod 13, the second anchor rod 23, and the third anchor rod 33 with the ground are all provided with external threads 25. The first anchor rod 13, the second anchor rod 23, and the third anchor rod 33 are exposed above the ground by a certain height, and the external threads 25 provided at the ends of the first anchor rod 13, the second anchor rod 23, and the third anchor rod 33 are screwed into the ground below, thereby forming a preliminary fixation of the first anchor rod 13, the second anchor rod 23, and the third anchor rod 33.

[0041] Reference Figure 1 and Figure 2 , As an implementation manner, the first anchor rod 13, the second anchor rod 23, and the third anchor rod 33 are arranged in a triangle, and the contact point of the tower leg 4 with the ground is located at the center of the triangle, which can form a symmetric support system, effectively disperse the vertical load and horizontal load transmitted by the tower leg 4. The contact point of the tower leg 4 with the ground is located at the center of the triangle, ensuring that the load is evenly transmitted to the foundation through the anchor rods, avoiding local stress concentration, and enhancing the anti-overturning ability.

[0042] Reference Figure 1 and Figure 2 , As an implementation manner, the diameters of the first anchor rod 13, the second anchor rod 23, and the third anchor rod 33 are equal to the diameter of the tower leg 4, which can ensure the stiffness and support strength of the anchor rods.

[0043] Reference Figure 1 and Figure 2 , As an implementation manner, the cable is fixed to the ground through anchor nails. The first cable 11 is connected to the ground through the first anchor nail, the second cable 21 is connected to the ground through the second anchor nail 24, and the third cable 31 is connected to the ground through the third anchor nail 34.

[0044] The present invention also discloses a method for replacing the tower leg of a transmission tower, which applies the above-mentioned transmission tower leg replacement structure and includes the following steps:

[0045] For the tower leg 43 to be replaced, it mainly includes the investigation and analysis of the surrounding terrain and geology, mainly including the analysis of the root opening distance of the iron tower, the tower type, the span, and the height difference terrain of the construction site. According to the data analysis results obtained, a new tower leg is manufactured;

[0046] The first anchor rod 13, the second anchor rod 23 and the third anchor rod 33 are arranged around the leg to be replaced, and a fastening structure 5 is additionally arranged on two adjacent anchor rods, that is, the upper chord 511, the lower chord 514, the first diagonal rod 512 and the second diagonal rod 513, so that the first anchor rod 13, the second anchor rod 23 and the third anchor rod 33 form a triangular structure in space;

[0047] The first cable 11, the second cable 21 and the third cable 31 respectively pass through the first fixed pulley 12, the second fixed pulley 22 and the third fixed pulley 32. One end of the first cable 11, the second cable 21 and the third cable 31 is connected to the flange 42, and the other end is fixed to the ground by anchor nails to tension the tower leg 43 to be replaced;

[0048] Remove the tower leg 43 to be replaced and install a new tower leg;

[0049] Remove the tower leg and replace the space structure

[0050] The transmission tower leg replacement structure and method provided in this embodiment can perform operations under live conditions, and can perform leg replacement construction operations whether on steep slopes or rough sites; the upper part of the tower leg is tightened by cables to improve construction efficiency and safety; and the structural device of this embodiment does not require the use of complex power equipment, and only the tension of fixed pulleys and cables is required to complete the leg replacement work of the transmission tower, reducing a large amount of manpower and construction difficulty.

[0051] It should be noted that for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A transmission tower leg replacement structure, characterized in that: It includes a cable and three spiral anchor structures arranged around the tower leg to be replaced, the spiral anchor structure includes an anchor rod and a fixed pulley arranged on the top of the anchor rod, the two ends of the cable are respectively connected to a connecting piece located above the part of the tower leg to be replaced and the ground, the cable passes through the fixed pulley, and the height of the fixed pulley is higher than the connecting piece.

2. The transmission tower leg replacement structure according to claim 1, characterized in that: It also includes a fastening structure arranged between adjacent anchor rods, which includes an upper chord rod and a lower chord rod arranged in parallel and perpendicular to the anchor rods, and a first oblique rod and a second oblique rod arranged alternately and connected to the ends of the upper chord rod and the lower chord rod respectively.

3. The transmission tower leg replacement structure according to claim 2, characterized in that: The anchor rod is provided with through holes in sequence from top to bottom, and ends of the upper chord rod, the lower chord rod, the first oblique rod and the second oblique rod are all arranged in the through holes.

4. The transmission tower leg replacement structure according to claim 1, characterized in that: The connecting piece is a clamping hoop clamped on the tower leg, and the clamping hoop is provided with a first connecting hole connected with the cable.

5. The transmission tower leg replacement structure according to claim 1, characterized in that: The connecting member is a flange, the tower legs include a non-replacement tower leg, a tower leg to be replaced located below the non-replacement tower leg, and the flange for connecting the non-replacement tower leg and the tower leg to be replaced, and the cable is connected to a second connecting hole set on the flange.

6. The transmission tower leg replacement structure according to claim 1, characterized in that: The matching ends of the anchor rod and the ground are provided with external threads.

7. The transmission tower leg replacement structure according to claim 1, characterized in that: The three anchor rods are arranged in a triangle, and the contact point between the tower leg and the ground is located at the center of the triangle.

8. The transmission tower leg replacement structure according to claim 1, characterized in that: The diameter of the anchor rod is equal to the diameter of the tower leg.

9. The transmission tower leg replacement structure according to claim 1, characterized in that: The cables are fixed to the ground by anchors.

10. A method for replacing a transmission tower leg, characterized in that: The application of the transmission tower leg replacement structure according to any one of claims 1 to 9 comprises the following steps: A spiral anchor structure is arranged around the tower leg to be replaced, and a fastening structure is added to the adjacent spiral anchor structure; The cable passes through the upper end of the spiral anchor structure, one end of the cable is connected to the flange of the tower leg, and the other end of the cable is fixed on the ground to tighten the tower leg to be replaced; Remove the tower legs to be replaced and install new tower legs; Remove the tower legs and replace the structure.

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