Flexible all-metal spacer and power transmission line

Abstract

The invention discloses a flexible all-metal spacer and a power transmission line, and relates to the technical field of electric power fittings, and the flexible all-metal spacer comprises a spacer body provided with a plurality of through holes, a plurality of wire clamp bodies rotationally connected with the plurality of through holes in a one-to-one correspondence manner, and a flexible buffer mechanism fixed at the connection part of each wire clamp body and the spacer body; the flexible buffering mechanism comprises a U-shaped body and limiting bodies fixed to the two ends of the U-shaped body respectively. A mounting groove for mounting a U-shaped body and a movable groove for mounting a limiting body are formed in the outer side of each through hole; the U-shaped body wraps the end part of the wire clamp main body; when the wire clamp main body rotates, the U-shaped body is driven to generate elastic deformation, and the limiting body generates displacement along the movable groove to provide elastic buffering for the wire clamp main body. The spacer has a flexible buffering capability, can cope with lead shaking caused by factors such as wind power and can adapt to a strong wind working condition, the all-metal anti-corrosion structure is suitable for lead fixation and vibration protection in a corrosive environment, and the service life of the spacer is prolonged.

Description

Technical Field

[0001] This invention relates to the field of power fittings technology, specifically to a flexible all-metal spacer and a power transmission line. Background Technology

[0002] Spacer bars for overhead lines are crucial hardware in ultra-high voltage (UHV) and extra-high voltage (EHV) transmission lines. Their core function is to secure multiple split conductors of the same phase, preventing them from whipping, colliding, or tangling. In UHV and EHV transmission, two-split, four-split, six-split, eight-split, or even more split conductors are commonly used to suppress corona loss and increase transmission capacity. However, under the influence of external forces such as wind, these parallel sub-conductors can sway asynchronously, easily colliding, causing conductor wear, strand breakage, and even line tripping.

[0003] Spacer bars prevent sub-conductors from colliding (whipping) with each other. Under wind conditions, the vibration frequencies and amplitudes of each sub-conductor may differ, making them prone to collisions. Collisions can damage the conductor surface, creating burrs or notches, triggering partial discharge (corona discharge), accelerating conductor corrosion and aging, and in severe cases, leading to conductor breakage. When wind blows across the conductor, it creates alternating vortices (Karman vortex streets) on the leeward side, causing continuous high-frequency, low-amplitude vibrations (micro-wind vibration). Prolonged micro-wind vibration can cause the conductor to break due to fatigue at the suspension clamp. The buffer elements on the spacer bars (usually hinged counterweights or elastic rubber components) can absorb this vibrational energy, effectively suppressing vibration.

[0004] Traditional all-metal spacer clamps are mostly rigidly connected to the frame, which cannot effectively absorb the vibration energy of the conductors. Traditional spacers often use rubber components for flexible buffering, but long-term exposure to humid, salt spray, and other environments makes them prone to aging and corrosion, leading to decreased grip strength and shortened lifespan. This problem is particularly prominent in highly corrosive environments such as coastal areas and chemical industrial parks, not only increasing the cost and difficulty of line maintenance but also potentially causing safety hazards.

[0005] In summary, the spacer bar structure in the prior art has the problem that rubber is prone to aging and corrosion when used to achieve flexible buffering, resulting in a reduced service life. Summary of the Invention

[0006] To address the problem that existing spacer structures using rubber for flexible cushioning are prone to aging and corrosion, leading to a reduced service life, this invention is proposed.

[0007] The objective of this invention is achieved through the following technical solution: In a first aspect, the present invention proposes a flexible all-metal spacer, comprising: a spacer body having a plurality of through holes, a plurality of clamp bodies rotatably connected to the plurality of through holes in a one-to-one correspondence, and a flexible buffer mechanism fixed at the connection point between each clamp body and the spacer body. The flexible buffer mechanism includes a U-shaped body and limiting bodies fixed at both ends of the U-shaped body; The outer side of each through hole on the spacer bar body is provided with a mounting groove for installing the U-shaped body and a movable groove for installing the limiting body; The U-shaped body wraps around the end of the clamp body; when the clamp body rotates, the limiting body moves along the movable groove, and the U-shaped body provides elastic cushioning for the clamp body.

[0008] Preferably, there are two spacer bodies; the two spacer bodies are respectively installed on both sides of the clamp body and are fixed by fasteners passing through the spacer body on one side, the clamp body on the other side in sequence.

[0009] Furthermore, the spacer also includes a sleeve, which is rotatably connected to the clamp body. The spacer bodies on both sides of the clamp body clamp the two ends of the sleeve, and the clamp body rotates around the sleeve between the spacer bodies on both sides.

[0010] Furthermore, the clamp body and the spacer bar bodies on both sides are fitted with a clearance fit.

[0011] Preferably, a limiting block extends outward along the rotation direction on the main body of the clamp, and the limiting block engages with the limiting body.

[0012] Preferably, the width of the mounting groove is greater than the thickness of the U-shaped body; Two limiting bodies are respectively abutted against one end of the movable groove. When the clamp body rotates, the limiting body at one end remains fixed, while the limiting body at the other end moves from one end of the movable groove to the other end. The U-shaped body undergoes elastic deformation in the mounting groove and approaches the side wall of the mounting groove.

[0013] Preferably, the U-shaped body and the limiting body are galvanized as a whole.

[0014] Preferably, both the U-shaped body and the limiting body are made of spring steel, and the yield strength of the spring steel is not less than 1200MPa.

[0015] Preferably, the rotation angle range of the clamp body is ±18°.

[0016] Secondly, the present invention provides a power transmission line, comprising a power transmission conductor and a flexible all-metal spacer as described in any of the above claims; the clamp body of the flexible all-metal spacer holds the power transmission conductor.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention provides a flexible all-metal spacer, comprising a spacer body with several through holes, several clamp bodies rotatably connected to each through hole, and a flexible buffer mechanism fixed at the connection point between each clamp body and the spacer body. The flexible buffer mechanism includes a U-shaped body and limiting bodies fixed at both ends of the U-shaped body. Each through hole has an outer mounting groove for the U-shaped body and a movable groove for the limiting bodies. The U-shaped body covers the end of the clamp body. When the clamp body rotates, the limiting bodies move along the movable grooves, and the U-shaped body provides elastic buffering for the clamp body. During the rotation of the clamp body, the limiting body at one end of the U-shaped body is limited by the movable groove, while the limiting body at the other end of the U-shaped body moves along the movable groove, causing the U-shaped body to undergo elastic deformation and generate elastic buffering force, thus providing flexible buffering capability. This allows the conductor to swing slightly within a certain range to cope with conductor swaying caused by wind and other factors, adapting to strong wind conditions. Furthermore, the all-metal anti-corrosion structure is suitable for conductor fixing and vibration protection in corrosive environments, increasing the service life of the spacer. Attached Figure Description

[0018] Figure 1 This is a front view of a flexible all-metal spacer in Embodiment 1 of the present invention; Figure 2 This is a front perspective view of a flexible all-metal spacer in Embodiment 1 of the present invention; Figure 3 This is a three-dimensional side view of a flexible all-metal spacer in Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the spacer body structure in Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the cooperation between the spacer body and the flexible buffer mechanism in Embodiment 1 of the present invention; Figure 6 This is a schematic diagram of the spacer body structure in Embodiment 1 of the present invention; Figure 7 This is a schematic diagram of the connection between the limiting block and the limiting body in Embodiment 1 of the present invention.

[0019] In the diagram: 1 is the main body of the clamp; 11 is the limiting block; 2 is the sleeve; 3 is the body of the spacer bar; 31 is the mounting groove; 32 is the movable groove; 4 is the flexible buffer mechanism; 41 is the U-shaped body; 42 is the limiting body; 5 is the bolt. Detailed Implementation

[0020] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0026] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0027] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0028] The accompanying drawings illustrate various structural schematic diagrams according to embodiments disclosed in this invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0029] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0030] Example 1: A flexible all-metal spacer, such as Figures 1 to 6 As shown, it includes a spacer body 3 with several through holes, several clamp bodies 1 that are rotatably connected to the several through holes one by one, and a flexible buffer mechanism 4 fixed at the connection between each clamp body 1 and the spacer body 3.

[0031] The flexible buffer mechanism 4 includes a U-shaped body 41 and limiting bodies 42 fixed at both ends of the U-shaped body 41 respectively; each through hole on the spacer bar body 3 is provided with an installation groove 31 for installing the U-shaped body 41 and an active groove 32 for installing the limiting body 42 on the outer side.

[0032] The U-shaped body 41 wraps around the end of the clamp body 1; when the clamp body 1 rotates, it causes the U-shaped body 41 to undergo elastic deformation, and the limiting body 42 is displaced along the movable groove 32, providing elastic buffering for the clamp body 1.

[0033] This invention provides a flexible all-metal spacer bar, comprising a spacer bar body 3 with several through holes, several clamp bodies 1 rotatably connected to the through holes one by one, and a flexible buffer mechanism 4 fixed at the connection point between each clamp body 1 and the spacer bar body 3. The flexible buffer mechanism 4 includes a U-shaped body 41 and limiting bodies 42 fixed at both ends of the U-shaped body. Each through hole has an installation groove 31 for mounting the U-shaped body 41 and a movable groove 32 for mounting the limiting body 42 on its outer side. The U-shaped body 41 covers the end of the clamp body 1. When the clamp body 1 rotates, it causes the U-shaped body 41 to undergo elastic deformation, and the limiting body 42 is displaced along the movable groove 32, providing elastic buffering for the clamp body 1. During the rotation of the main body 1 of the online clamp, the limiting body 42 at one end of the U-shaped body 41 is limited by the movable groove 32, and the limiting body 42 at the other end of the U-shaped body 41 moves along the movable groove 32, causing the U-shaped body 1 to undergo elastic deformation and generate elastic buffering force, thereby having flexible buffering capability, allowing the conductor to swing slightly within a certain range to cope with the conductor swaying caused by factors such as wind force, adapting to strong wind conditions, and the all-metal anti-corrosion structure is suitable for conductor fixing and vibration protection in corrosive environments, increasing the service life of the spacer bar.

[0034] This invention provides a flexible buffer structure for all-metal corrosion-resistant flexible spacers used in high-voltage transmission lines, particularly suitable for conductor fixing and vibration protection in corrosive environments. During power transmission, the stable operation of high-voltage transmission lines is crucial, and the spacer, as a key component ensuring conductor safety, directly affects the reliability of the transmission line. This invention offers a novel solution for the specific scenario of corrosive environments, filling the gap in the field of all-metal corrosion-resistant spacers with flexible buffering capabilities. The all-metal elastic connection structure of this invention possesses flexible buffering capabilities through the use of a flexible buffering mechanism 4. During the elastic deformation of the U-shaped body 41, the molecular structure inside the U-shaped body 41 is stretched or compressed, converting external kinetic energy (i.e., the impact when the clamp body 1 rotates) into elastic potential energy within the material. When the external force disappears, the stored elastic potential energy is released, causing the U-shaped body 41 to return to its original shape. The recovery process is relatively slow and gentle, rather than an instantaneous rigid rebound, thus achieving a buffering effect. The structure of this invention allows the conductor to swing slightly within a certain range to cope with conductor swaying caused by factors such as wind. It adopts high fatigue strength metal elastic elements and a fully corrosion-resistant structure to adapt to harsh environments.

[0035] Specifically, such as Figures 2 to 4As shown, in this embodiment of the invention, there are two spacer bodies 3; the two spacer bodies 3 are respectively installed on both sides of the clamp body 1, and are fixedly connected by fasteners that pass through the spacer body 3 on one side, the clamp body 1, and the spacer body 3 on the other side in sequence. Each clamp body 1 is fixedly connected by one fastener, and the connection method is preferably a detachable connection.

[0036] Further explanation is needed, such as Figures 3 to 4 As shown, the device in this embodiment of the invention further includes a bolt 5, two spacer bar bodies 3 clamp the wire clamp body 1, and one end of the bolt 5 passes through the spacer bar body 3 on one side, the wire clamp body 1 and the spacer bar body 3 on the other side in sequence through the through hole on one side, and is then fixed with a nut.

[0037] The wire clamp body 1 includes a fixed wire clamp body and a movable wire clamp cover plate. One end of the movable wire clamp cover plate is hinged to one end of the fixed wire clamp body to form a clamp-shaped structure with jaws. A flexible structure is fixedly set inside the jaws to form a wire fixing hole. The flexible structure plays a role in protecting the wire.

[0038] Specifically, such as Figure 1 and Figure 7 As shown, in this embodiment of the invention, the spacer bar further includes a sleeve 2. The sleeve 2 is mounted on the wire clamp body 1 for rotatable connection. The spacer bar bodies 3 on both sides of the wire clamp body 1 clamp the two ends of the sleeve 2. The wire clamp body 1 rotates around the sleeve 2 between the spacer bar bodies 3 on both sides.

[0039] It should be further explained that the clamp body 1 and the spacer bar bodies 3 on both sides are fitted with a clearance fit. That is, the two spacer bar bodies 3 are connected by bolts to restrict the clamp body 1, and a sleeve 2 is embedded between the two spacer bar bodies 3, so that there is a certain gap between the clamp body 1 and the spacer bar bodies 3, allowing rotation. The through holes on the spacer bar bodies 3 can be set as stepped holes, so that the two ends of the sleeve 2 are respectively engaged with the stepped surfaces of the stepped holes in the spacer bar bodies 3 on both sides, thus limiting the position of the sleeve 2.

[0040] Specifically, such as Figure 7 As shown, in this embodiment of the invention, a limiting block 11 extends outward along the rotation direction on the main body 1 of the clamp, and the limiting block 11 is engaged with the limiting body 42. By engaging the limiting block 11 with the limiting body 42, the limiting block 11 can fit tightly against the limiting body 42, and drive the limiting body 42 to move during rotation.

[0041] Further explanation is needed, such as Figure 6 As shown, the movable groove 32 is a crescent-shaped through hole. The arc-shaped structure of the crescent-shaped through hole facilitates the movement of the limiting body 42 along the rotation direction inside the movable groove 32.

[0042] Specifically, such as Figure 7 As shown, the width of the mounting groove 31 is greater than the thickness of the U-shaped body 41; the two limiting bodies 42 respectively abut against one end of the movable groove 32. When the clamp body 1 rotates, the limiting body 42 at one end remains fixed, while the limiting body 42 at the other end moves from one end of the movable groove 32 to the other end. The U-shaped body 41 undergoes elastic deformation within the mounting groove 31, approaching the side wall of the mounting groove 31, thereby generating elastic buffering force to offset the vibration energy of the conductor and cope with conductor swaying caused by factors such as wind, thus adapting to strong wind conditions. Specifically, when the pressure of the clamp body 1 rotating acts on the open end (i.e., the limiting body 42) of the U-shaped body 41, the side walls at both ends of the U-shaped body 41 tend to open, causing the side wall at one end of the U-shaped body 41 (the force-bearing end) to undergo elastic deformation.

[0043] It should be further explained that the U-shaped body 41 and the limiting body 42 in the flexible buffer mechanism 4 are an integral structure, which can be processed by stamping and welding processes. The processing flow is simple, easy to manufacture, and can be adapted to mass production. Furthermore, the U-shaped body 41 can begin to deform under small forces, providing initial buffering. As the force increases, the deformation increases, providing stronger support and exhibiting good force-displacement characteristics. Compared to solid blocks or short and thick structures, the curved part of the U-shape provides a longer and controllable deformation path, which can more effectively absorb large impacts.

[0044] Specifically, in this embodiment of the invention, both the U-shaped body 41 and the limiting body 42 are made of spring steel, and the yield strength of the spring steel is not less than 1200 MPa. By selecting spring steel material, the fatigue life of the U-shaped body 41 and the limiting body 42 can be improved, and the U-shaped body 41 and the limiting body 42 are not easily worn when rotating, thus having the advantage of long service life.

[0045] The embodiment uses a wire clamp-spacer body elastic flexible buffer structure, wherein the U-shaped body adopts a spring plate hinge design, and the wire clamp body 1 and the spacer body 3 are connected by a flexible buffer mechanism 4; the spacer body 3 has a U-shaped groove (i.e., mounting groove 31) corresponding to the U-shaped body, and the pin (i.e., limiting body 42) is fixed at both ends of the U-shaped spring plate (i.e., U-shaped body 41) to achieve a swing angle of ±18°.

[0046] Specifically, in this embodiment of the invention, both the U-shaped body 41 and the limiting body 42 are made of high-performance spring steel, and the yield strength of the spring steel is not less than 1200 MPa. Preferably, in this embodiment of the invention, the U-shaped body 41 and the limiting body 42 are made of spring steel (grade 60Si2MnA), which has a yield strength of 1200 MPa and a fatigue life superior to stainless steel.

[0047] Specifically, in this embodiment of the invention, the spring steel components on the U-shaped body 41 and the limiting body 42 are galvanized to achieve corrosion protection.

[0048] In this embodiment of the invention, the flexible buffer mechanism 4 is inserted into the connection of the clamp body 1, and the limiting block 11 on the clamp body 1 can be tightly attached to the elastic element retaining shaft (i.e., the limiting body 42) in the flexible buffer mechanism 4; a sleeve 2 is placed in the middle of the connected clamp body 1, and the two spacer rod bodies 3 are pressed together with bolts 5. At this time, the two spacer rod bodies 3 clamp the sleeve 2, so that there is a gap between the clamp body 1 and the spacer rod bodies 3, which facilitates rotation. In this embodiment of the invention, the spring plate of the U-shaped body 41 is preferably 72mm×20mm×3mm (simulation verification meets ±18° swing and 10^6 fatigue life).

[0049] The present invention provides a flexible all-metal spacer bar, which is made of all-metal corrosion-resistant material, has no rubber parts, and has a service life that is increased by more than 50%; it absorbs vibration energy, and the U-shaped body 41 in the flexible buffer mechanism 4 provides elastic and flexible buffering, reducing the vibration amplitude of the conductor by more than 30%; it can adapt to large-angle deflection and can achieve a swing range of ±18° to adapt to strong wind conditions; it has high reliability, and the fatigue strength of spring steel ensures a service life of more than 10 years.

[0050] Example 2: Based on the same inventive concept, the present invention also provides a power transmission line, comprising: a power transmission conductor and a flexible all-metal spacer as in Embodiment 1; the clamp body 1 of the spacer device clamps the power transmission conductor.

[0051] The transmission line in this embodiment of the invention is an overhead transmission line (voltage level generally 110kV and above). The flexible all-metal spacers can be arranged in a tiered or symmetrical manner. The number of spacers installed depends on the voltage level of the transmission line, the number of conductor splits, the span length, and local meteorological conditions. Higher voltage, more conductor splits, longer spans, and more complex wind conditions require more spacers. Flexible all-metal spacers can alter the vibration mode and frequency of conductor swaying caused by wind and other factors, effectively absorbing the energy of light wind vibrations and providing additional vibration protection. They can adapt to strong wind conditions, and the all-metal corrosion-resistant structure is suitable for conductor fixation and vibration protection in corrosive environments, increasing the service life of the spacers.

[0052] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A flexible all-metal spacer, characterized in that, include: A spacer bar body (3) with several through holes, several wire clamp bodies (1) that are rotatably connected to the several through holes one by one, and a flexible buffer mechanism (4) fixed at the connection between each wire clamp body (1) and the spacer bar body (3). The flexible buffer mechanism (4) includes a U-shaped body (41) and limiting bodies (42) fixed at both ends of the U-shaped body (41). The spacer body (3) has an installation groove (31) for installing the U-shaped body (41) and an active groove (32) for installing the limiting body (42) on the outer side of each through hole. The U-shaped body (41) wraps around the end of the clamp body (1); when the clamp body (1) rotates, the limiting body (42) moves along the movable groove (32), and the U-shaped body (41) provides elastic buffering for the clamp body (1).

2. The flexible all-metal spacer according to claim 1, characterized in that, The number of spacer bodies (3) is two; the two spacer bodies (3) are respectively installed on both sides of the clamp body (1) and fixed by fasteners passing through the spacer body (3) on one side, the clamp body (1) on the other side in sequence.

3. A flexible all-metal spacer according to claim 2, characterized in that, The spacer also includes a sleeve (2), which is mounted on the clamp body (1) and rotatably connected. The spacer bodies (3) on both sides of the clamp body (1) clamp the two ends of the sleeve (2), and the clamp body (1) rotates around the sleeve (2) between the spacer bodies (3) on both sides.

4. A flexible all-metal spacer according to claim 3, characterized in that, The clamp body (1) and the spacer body (3) on both sides are fitted with a clearance fit.

5. A flexible all-metal spacer according to claim 1, characterized in that, The clamp body (1) extends outward along the rotation direction to form a limiting block (11), and the limiting block (11) engages with the limiting body (42).

6. A flexible all-metal spacer according to claim 1, characterized in that, The width of the mounting groove (31) is greater than the thickness of the U-shaped body (41); Two limiting bodies (42) respectively abut against one end of the movable groove (32). When the clamp body (1) rotates, the limiting body (42) at one end is fixed, and the limiting body (42) at the other end moves from one end of the movable groove (32) to the other end of the movable groove (32). The U-shaped body (41) undergoes elastic deformation in the mounting groove (31) and approaches the side wall of the mounting groove (31).

7. A flexible all-metal spacer according to claim 1, characterized in that, The U-shaped body (41) and the limiting body (42) are galvanized as a whole.

8. A flexible all-metal spacer according to claim 1, characterized in that, Both the U-shaped body (41) and the limiting body (42) are made of spring steel, and the yield strength of the spring steel is not less than 1200MPa.

9. A flexible all-metal spacer according to claim 1, characterized in that, The rotation angle range of the clamp body (1) is ±18°.

10. A power transmission line, characterized in that, It includes a power transmission conductor and a flexible all-metal spacer as described in any one of claims 1 to 9; the wire clamp body (1) in the flexible all-metal spacer clamps the power transmission conductor.

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