CN113739974A - Tension-adjustable stay wire joint and stay wire foundation of all-steel stay wire tower - Google Patents

Tension-adjustable stay wire joint and stay wire foundation of all-steel stay wire tower Download PDF

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Publication number
CN113739974A
CN113739974A CN202110919814.5A CN202110919814A CN113739974A CN 113739974 A CN113739974 A CN 113739974A CN 202110919814 A CN202110919814 A CN 202110919814A CN 113739974 A CN113739974 A CN 113739974A
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China
Prior art keywords
stay wire
tension
clamping head
wire
adjustable
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CN202110919814.5A
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CN113739974B (en
Inventor
邵国栋
王聪
刘娟
庞继勇
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SEPCO Electric Power Construction Co Ltd
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SEPCO Electric Power Construction Co Ltd
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Priority to CN202110919814.5A priority Critical patent/CN113739974B/en
Publication of CN113739974A publication Critical patent/CN113739974A/en
Priority to PCT/CN2022/107729 priority patent/WO2023016238A1/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/04Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
    • G01L5/10Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means
    • G01L5/105Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means using electro-optical means
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00Measuring force or stress, in general
    • G01L1/24Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
    • G01L1/242Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
    • G01L1/246Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre using integrated gratings, e.g. Bragg gratings

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Suspension Of Electric Lines Or Cables (AREA)
  • Bridges Or Land Bridges (AREA)
  • Piles And Underground Anchors (AREA)

Abstract

The invention discloses a tension-adjustable stay wire joint and an all-steel stay wire tower stay wire foundation, belonging to the technical field of power transmission lines and comprising a threaded column, a threaded cylinder, a stay wire clamping head and a plug board, wherein the threaded column is in threaded connection with the threaded cylinder; the pull wire clamping head is inserted in the rotating groove, the tail end of the pull wire clamping head is polygonal, the shape of the tail end of the inserting plate is matched with the shape of the cross section of the tail end of the pull wire clamping head, and the tail end of the inserting plate is attached to the pull wire clamping head to avoid the rotation of the pull wire clamping head.

Description

Tension-adjustable stay wire joint and stay wire foundation of all-steel stay wire tower
Technical Field
The invention belongs to the technical field of power transmission lines, and particularly relates to a tension-adjustable stay wire joint and an all-steel stay wire tower stay wire foundation.
Background
The inventor finds that tension of a stay wire of a power transmission tower is loosened or a spiral anchor foundation is pulled out occasionally, and tension changes easily cause displacement deformation of a power transmission line and a stay wire joint, so that power transmission safety is seriously influenced. In the prior art, the tension is usually adjusted by replacing the stay wire joint, the operation is complex, and the safety degree is low.
In addition, the single spiral anchor foundation has low bearing capacity, is easy to deform under the action of long-term load, and is used for the wire-pulling foundation, and the phenomenon that the tension is loose or the spiral anchor foundation is pulled out occurs. When single design pulling force of acting as go-between exceeded 100kN, often adopted a plurality of spiral anchor foundations in the actual engineering, generally set up a connection steel sheet this moment, and upper portion is used for connecting the acting as go-between, and the lower part is used for connecting a plurality of spiral anchor foundations, because the stock external diameter generally exceeds 90mm, consequently, when adopting a plurality of stocks and upper portion steel sheet to connect, the steel sheet size is great. The inventors believe that the above-described mode of operation not only wastes steel, but is also inconvenient for field installation. In particular, due to the existence of construction errors, relative positions of a plurality of spiral anchor foundations are deviated, so that the phenomenon that the spiral anchor foundations and the connecting steel plates are difficult to connect occurs.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a tension-adjustable stay wire joint and an all-steel stay wire tower stay wire foundation, which have the function of tension adjustment and can adjust the tension when the transmission tower stay wire is subjected to displacement deformation caused by tension change; the existing spiral anchor foundation type is improved, the economy is improved, and meanwhile, the site construction is facilitated.
In order to achieve the purpose, the invention is realized by the following technical scheme:
in a first aspect, the technical scheme of the invention provides a tension-adjustable stay wire joint which comprises a threaded column, a threaded cylinder, a stay wire clamping head and a plug board, wherein the threaded column is in threaded connection with the threaded cylinder; the pull wire clamping head is inserted in the rotating groove, the tail end of the pull wire clamping head is polygonal, the shape of the tail end of the inserting plate is matched with the shape of the cross section of the tail end of the pull wire clamping head, and the tail end of the inserting plate is attached to the pull wire clamping head to avoid the rotation of the pull wire clamping head.
Furthermore, an opening for bolt connection is formed in one end, far away from the threaded column, of the threaded cylinder.
Furthermore, the upper end face of the platform is further provided with a hole communicated with the guide groove, the inserting plate is provided with a threaded hole, and the bolt penetrates through the hole in the platform to be connected with the threaded hole of the inserting plate.
Furthermore, the guide groove is equal in width, the tail end of the main body of the stay wire clamping head is connected with a sheet body with the diameter larger than that of the column body through the column body with the diameter smaller than that of the stay wire clamping head, and the maximum size of the sheet body is smaller than or equal to the width of the guide groove.
Further, the sheet-shaped body is polygonal.
Furthermore, the sheet-shaped body is hexagonal, the tail end of the inserting plate is provided with a groove, the groove is in a half-hexagonal shape, and the groove can be attached to the sheet-shaped body.
Furthermore, the stay wire clamping head is columnar.
In a second aspect, the invention further provides an all-steel guyed tower guyed foundation, which comprises a connecting steel plate and an anchor rod, wherein the upper part of the connecting steel plate is connected with the tension-adjustable guyed joint in any one of the technical schemes of the first aspect, and the lower part of the connecting steel plate is connected with the anchor rod; the anchor rod and the connecting steel plate are connected through a flexible connecting stay wire.
Furthermore, the tension measuring device for the fiber bragg grating is attached to the surface of the stay wire to measure the tension of the stay wire.
Further, in the above-mentioned case,
the technical scheme of the invention has the following beneficial effects:
1) the tension-adjustable stay wire joint is designed in a knob type combined connection mode, so that the problem of loose tension of a stay wire in the operation of a stay wire tower is solved conveniently, and the tension-adjustable stay wire joint is simpler in structure and higher in economy compared with the existing connection mode; under the condition that the connector has enough length, the tensioning force can be adjusted in a large range by screwing, and the pull wire is further screwed in after the problem of tension relaxation is generated.
2) According to the all-steel guyed tower guyed foundation, the design and matching of the tension adjustable guyed joint are used for increasing the buried depth, so that the size of a connecting steel plate can be obviously reduced, and the steel consumption is reduced; the connecting stay wire is of a flexible structure, the position of the spiral anchor after construction is allowed to deviate a little, and the situation that the spiral anchor is difficult to connect with the connecting steel plate after the positions of the spiral anchors deviate is avoided.
3) According to the invention, the steel plate and the power transmission tower stay wire are connected through the connector, the stay wire tower foundation and the power transmission tower stay wire are indirectly connected, the tension adjusting function is achieved, tension adjustment can be carried out when the power transmission tower stay wire is subjected to displacement deformation caused by tension change, the safety of a power transmission tower line is ensured, the radial direction is ensured not to generate relative displacement through the insertion design between the stay wire clamping head and the platform, and the stay wire clamping head is fixed by using the inserting plate so as to ensure that the stay wire clamping head and the platform do not rotate around the axis direction.
4) The arrangement of the fiber bragg grating tension measuring device is convenient for measuring the tension of the stay wire, and when the tension does not meet the requirement, the stay wire tower is maintained in time.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a basic front view of the present invention according to one or more embodiments;
FIG. 2 is a basic side view of the present invention according to one or more embodiments;
FIG. 3 is a section of the helical anchor foundation of FIG. 1 according to one or more embodiments of the present invention;
FIG. 4 is a diagram of a basic segmentation of a spiral anchor in accordance with one or more embodiments of the present invention FIG. 2;
FIG. 5 is a helical anchor foundation section FIG. 3 according to one or more embodiments of the invention;
FIG. 6 is a helical anchor foundation section FIG. 4 in accordance with one or more embodiments of the present invention;
FIG. 7 is a schematic view of a connecting wire and wire-to-plate joint according to one or more embodiments of the present invention;
FIG. 8 is a schematic illustration of a connecting pull wire according to one or more embodiments of the present invention;
FIG. 9 is a schematic illustration of a twist bolt construction of the present invention according to one or more embodiments;
FIG. 10 is a schematic view of a tension adjustable cable joint and cable end according to one or more embodiments of the present invention;
FIG. 11 is a schematic drawing of a tension adjustable cable joint and cable end 1 according to one or more embodiments of the present invention;
FIG. 12 is a schematic view of a tension adjustable cable joint and cable end according to one or more embodiments of the present invention 2;
FIG. 13 is a schematic drawing of a tension adjustable cable joint and cable end according to one or more embodiments of the present invention 3;
FIG. 14 is a schematic view of a twisted steel plate according to one or more embodiments of the present invention;
figure 15 is a schematic view of an interposer according to one or more embodiments of the present invention.
In the figure: A. the tension measuring device comprises a power transmission tower stay wire, a tension adjustable stay wire joint, a K fiber bragg grating tension measuring device, a D first stay wire-steel plate connector, an F second stay wire-steel plate connector, a C connecting steel plate, an E connecting stay wire, a G screwing anchor rod, an H top anchor rod, a I standard section anchor rod, a J anchor head anchor rod, an a included angle between the power transmission tower stay wire and the ground, a G1 anchor rod of the screwing anchor rod, a G2 internal threads, a G3 stay wire hole, a G4 top steel plate; h1, a ring plate, H2, an anchor sheet, H3, an anchor rod, H4, external threads, H5, a connecting steel plate, H6 and a top steel plate; i1, an anchor rod I2, an anchor sheet I3 and a connecting bolt; j1, an anchor head, J2, an anchor sheet, J3, an anchor rod, J4, a connecting bolt, D1, a buckle plate, D2, a bolt for connecting the buckle plate and a connecting steel plate, D3, an extrusion bolt, E1, the top of a connecting stay wire, E11, a stay wire diameter increasing part, H1, a ring plate, H3, the anchor rod, A1, a screwed steel plate, A2, a stay wire external thread, A3, a stay wire clamping head, A4, an end rotating head, A5, a guide groove, A6, a fixing bolt, B1, a joint internal thread, B2, a joint cylinder wall, B3, a bolt hole, H1, a normal screwed segment length, H2, a thread reserved segment length, A7, an insert plate, A8, a rotating groove, A9 and a bolt hole.
The spacing or dimensions between each other are exaggerated to show the location of the various parts, and the illustration is for illustrative purposes only.
Detailed Description
It should be noted that the following embodiments may be combined in any combination.
Example 1
In a typical implementation manner of the invention, the embodiment discloses a tension-adjustable stay wire connector, which is used for connecting a connecting steel plate and a stay wire of a power transmission tower through the connector lug, indirectly connecting a stay wire tower foundation and the stay wire of the power transmission tower, has a tension adjusting function, can adjust tension when the stay wire of the power transmission tower is subjected to displacement deformation caused by tension change, and ensures the safety of a line of the power transmission tower; the upper end surface of the platform is provided with a rotating groove, the side surface of the platform is provided with a guide groove, the tail end of the guide groove is communicated with the rotating groove, and the rotating groove is used for inserting the plugboard; the stay wire clamping head is inserted in the rotating groove in an inserted connection mode, relative displacement between the stay wire clamping head and the platform in the axis direction can be guaranteed through the inserted connection, and the shape of the tail end of the inserting plate is matched with the shape of the cross section of the tail end of the stay wire clamping head to be attached to the stay wire clamping head. In the embodiment, the spiral insertion design between the wire clamping head and the platform ensures that the radial direction does not generate relative displacement in a specific state and can move relatively in another specific state, and the wire clamping head is fixed by using the inserting plate so as to ensure that the wire clamping head and the platform do not rotate around the axis direction.
The threaded cylinder is provided with an opening for bolt connection at one end far away from the threaded column, and the threaded cylinder can be connected to the connecting steel plate through the opening.
The up end of platform has still seted up in the trompil, and the trompil communicates the guide slot, and the picture peg sets up threaded hole, and the screw hole of picture peg is connected in the trompil on the platform is passed to the bolt to fix the picture peg in the guide slot, keep the relative motionless position relation between picture peg and the platform, further fixed stay wire holding head is in order to guarantee not take place around the rotation of axis direction between stay wire holding head and the platform.
In order to realize the fixation of the stay wire clamping head and the platform on two degrees of freedom, the guide groove in the embodiment has the same width and the same height so as to facilitate the insertion plate to pass in and out, the tail end of the main body of the stay wire clamping head is connected with a sheet body with the diameter larger than that of the columnar body through a columnar body with the diameter smaller than that of the stay wire clamping head, and the maximum size of the sheet body is smaller than or equal to the width of the guide groove.
The sheet-like body is polygonal, in other embodiments, the sheet-like body may have other irregular shapes, and it should be noted that the sheet-like body cannot be circular or have other shapes with too smooth surfaces of revolution.
In yet another embodiment, the platelets may also be replaced with prisms.
It will be appreciated that the height of the sheet or prism, whether it be less than the width of the channel.
In order to install the stay wire holding head, the platform is further provided with an installation groove, the installation groove is communicated with the outer edge of the platform and the rotating groove, the installation groove is equal in width, the width of the installation groove is larger than the outer diameter of the cylindrical body and smaller than the outer diameter of the sheet-shaped body, and when the stay wire holding head is assembled, the cylindrical body of the stay wire holding head enters the installation groove from an inlet, located at the outer edge of the platform, of the installation groove and reaches the rotating groove located at the center of the platform.
In the embodiment, the sheet-shaped body is hexagonal, the tail end of the inserting plate is provided with the groove, the groove is in a half-hexagonal shape, and the groove can be attached to the sheet-shaped body, so that the sheet-shaped body is clamped, and the stay wire clamping head is prevented from rotating.
In this embodiment, the stay wire clamping head is columnar.
More specifically, in the implementation, the platform is designed to be screwed with a steel plate a1, the threaded column is provided with a stay wire external thread a2, the sheet body is designed to be an end rotating head a4, the stay wire clamping head A3 is connected with the stay wire, a guide groove a5 and a rotating groove A8 are arranged in the screwed steel plate a1, the end rotating head a4 enters the rotating groove A8 through the guide groove a5, then the inserting plate a7 is inserted into the inserting plate A6 and fixed. When the tension of the pull wire is relaxed, the tension of the pull wire can be increased by screwing A1. Compared with the existing stay wire fastening scheme, the stay wire fastening device is simple in design and structure, convenient to operate and material-saving.
Example 2
In a typical embodiment of the present invention, the present embodiment discloses an all-steel guyed tower guyed foundation, and the foundation in the present embodiment includes a connection guyed a, a connection steel plate C, a connection guyed E, a tension adjustable guyed joint B, a guyed-steel plate joint, a fiber bragg grating tension measuring device K, and a spiral anchor foundation portion, and in addition to the above connection assembly, includes a screwing anchor rod G. The upper part of the connecting steel plate C is connected with a stay wire A of a stay wire tower through a tension-adjustable stay wire joint B, and the lower part of the connecting steel plate C is connected with a connecting stay wire E through a stay wire-steel plate joint D; the connecting stay wire E is connected with the top anchor rod H through a stay wire-steel plate connector F.
As shown in fig. 1, a plurality of single screw anchor foundations can be assembled by connecting steel plates. In order to fully exert the bearing capacity of the foundation, the included angle between the plane of the spiral anchor and the ground is equal to the included angle between the stay wire of the power transmission tower and the ground.
As shown in figure 1, one end of the connecting stay wire is connected with the connecting steel plate, and the other end of the connecting stay wire is connected with the spiral anchor foundation. This type of connection has the following advantages: 1. the specification of the connecting steel plate can be reduced, and materials are saved. The size of the anchor rod is much larger than that of the connecting stay wire, and when the number of the spiral anchors is large, the size of the connecting steel plate is large, and the anchor rod is inconvenient to install on site. The diameter of the connecting stay wire is very small, and the application of the connecting stay wire can obviously reduce the specification of the connecting steel plate; 2. the bearing capacity of the overall foundation can be improved. Under the condition that the size of a single spiral anchor foundation is determined, the length of the foundation is increased to be equal to the length of the connecting stay wire due to the increase of the buried depth of the foundation, and the bearing capacity of the whole foundation can be obviously improved. 3. The connection mode can effectively avoid the problem that the connection of the connecting steel plate and the spiral anchor foundation is difficult due to construction errors.
The two ends of the connecting stay wire are provided with the enlarged head parts. When the cable is installed, the end part is embedded in the stay wire-steel plate connector and is not pulled out. The length of the connecting stay wire can be 1.5 m-2.5 m, and the design value of the tensile strength of the connecting stay wire is not less than the design value of the anti-pulling bearing capacity of the single spiral anchor.
As shown in fig. 3, the anchor rods used in construction include a screw bolt, a top bolt, a standard segment bolt and an anchor head bolt.
The outer wall of the screwing anchor rod is provided with a round opening for the penetration of the connecting stay wire in the construction process, and the screwing anchor rod is used for screwing the spiral anchor foundation and the connecting stay wire to a specified depth. The inner wall of the top of the screwing anchor rod is a thread, and can be screwed into a soil body in the forward direction or can be screwed reversely to be separated from the top anchor rod. The inner diameter is equal to the outer diameter of the top anchor rod and is connected with the top anchor rod before screwing operation. And after the spiral anchor foundation is screwed to the manufacturing position, reversely screwing the spiral anchor foundation to the screwing anchor rod and pulling out the ground. The screwing anchor rod can be repeatedly used, and high-strength steel is preferably adopted.
The outer wall of the top anchor rod is provided with threads, and the top anchor rod is connected with the screwing anchor rod during construction. A ring plate is welded below the thread section of the top anchor rod, so that the thread connection length of the screwing anchor rod and the top anchor rod can be controlled, and the phenomenon that the screwing anchor rod is difficult to be screwed out of the ground is prevented.
The standard section anchor rod and the anchor head anchor rod can be set in the types and the lengths according to actual engineering requirements, and the lengths of the standard section anchor rod can be different.
The stay wire-steel plate connector comprises 2 steel plates and a plurality of connecting screws, and has the advantage of convenience in installation. The steel plate and the bolt are made of high-strength materials, so that the size of the steel plate and the bolt is reduced. The 2 steel plates are internally provided with grooves for embedding the ends of the connecting pull wires. The bolt on the upper part is used for connecting the joint and the connecting steel plates, and the plurality of screws on the lower part are used for generating extrusion force on the 2 steel plates so as to ensure that the connecting stay wire is not pulled out.
Example 3
In a typical embodiment of the present invention, this embodiment discloses a construction method of an all-steel guyed tower guyed foundation as described in example 2, which includes the following specific steps:
s1, screwing the anchor head section anchor rod;
s2, screwing the standard section anchor rod;
s3, screwing a top anchor rod;
s4, completing the assembly of the connecting pull wire and the top anchor rod;
s5, penetrating a pull wire into the screwing anchor rod, then performing screwing operation on the screwing anchor rod, screwing to a specified position, reversely screwing the anchor rod, and detaching after the screwing anchor rod is completely exposed out of the ground;
s6, repeating the sequence, and assembling the connecting steel plates and the connecting pull wires after finishing the construction of all the single spiral anchors;
and S7, completing the assembly of the power transmission tower stay wire and the connecting steel plate.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A tension-adjustable stay wire joint is characterized by comprising a threaded column, a threaded cylinder, a stay wire clamping head and a plug board, wherein the threaded column is in threaded connection with the threaded cylinder; the pull wire clamping head is inserted in the rotating groove, the tail end of the pull wire clamping head is polygonal, the shape of the tail end of the inserting plate is matched with the shape of the cross section of the tail end of the pull wire clamping head, and the tail end of the inserting plate is attached to the pull wire clamping head to avoid the rotation of the pull wire clamping head.
2. The tension adjustable wire joint as recited in claim 1, wherein an opening for bolting is provided at an end of the threaded cylinder remote from the threaded post.
3. The tension adjustable wire joint as recited in claim 1, wherein the upper end surface of the platform is further provided with an opening communicating with the guide groove, the insert plate is provided with a threaded hole, and the bolt passes through the opening on the platform and is connected with the threaded hole of the insert plate.
4. The tension adjustable wire joint as claimed in claim 1, wherein the guide groove has a uniform width, the end of the body of the wire clamping head is connected to a sheet having a diameter larger than that of the column by the column having a diameter smaller than that of the wire clamping head, and the maximum dimension of the sheet is equal to or smaller than the width of the guide groove.
5. The tension adjustable wire joint as recited in claim 4, wherein the sheet-like body has a polygonal shape.
6. The tension adjustable wire joint as defined in claim 5, wherein the plate is hexagonal, the end of the insertion plate is provided with a recess having a shape of a half hexagon, and the recess is capable of fitting to the plate.
7. The tension-adjustable stay wire connector as recited in claim 4, wherein the platform further defines a mounting groove, the mounting groove communicates with the outer edge of the platform and the rotation groove, the mounting groove has the same width, and the width of the mounting groove is larger than the outer diameter of the cylindrical body and smaller than the outer diameter of the sheet-like body.
8. The tension adjustable wire joint as recited in claim 1, wherein the wire holder is cylindrical.
9. The all-steel guyed tower guyed foundation is characterized by comprising a connecting steel plate and an anchor rod, wherein the upper part of the connecting steel plate is connected with the tension-adjustable guyed joint according to any one of claims 1 to 8, and the lower part of the connecting steel plate is connected with the anchor rod; the anchor rod and the connecting steel plate are connected through a connecting flexible connecting stay wire.
10. The all-steel guyed tower guyed foundation of claim 9, further comprising a fiber grating tension measuring device, wherein the fiber grating tension measuring device is adhered to the surface of the guyed wire to measure the guyed wire tension.
CN202110919814.5A 2021-08-11 2021-08-11 Tension-adjustable stay wire connector and all-steel stay wire tower stay wire foundation Active CN113739974B (en)

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CN202110919814.5A CN113739974B (en) 2021-08-11 2021-08-11 Tension-adjustable stay wire connector and all-steel stay wire tower stay wire foundation
PCT/CN2022/107729 WO2023016238A1 (en) 2021-08-11 2022-07-26 Tension-adjustable pull wire joint and all-steel pull wire tower pull wire foundation

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