Load-bearing angle steel locking mechanism of power transmission tower

Abstract

The invention relates to a power transmission tower load-bearing angle steel locking mechanism which comprises a supporting seat, a wedge-shaped friction block and two rotating arms, the supporting seat is located on the inner side of the vertex angle of angle steel, the angle steel is wrapped by the two rotating arms after the two rotating arms are folded, and the supporting seat and the wedge-shaped friction block are in contact through an inclined face. Compared with the prior art, through the designed structure of the supporting base, the wedge-shaped friction block and the two rotating arms, on one hand, the supporting base and the wedge-shaped friction block conduct supporting from the inner side of the vertex angle of the angle steel, and the two rotating arms are matched with the mode that the two rotating arms surround the angle steel to press two side plates of the angle steel; on the other hand, the supporting seat is in contact with the wedge-shaped friction block through the vamp, so that when power is lost, the force of the self-gravity of the supporting seat acting on the wedge-shaped friction block has a component perpendicular to the axis direction of the angle steel, the wedge-shaped friction block is pressed on the angle steel through the component, and the angle steel is prevented from deforming. And self-locking after power loss is realized.

Description

Technical Field

[0001] This invention relates to the field of power poles and towers, and in particular to a locking mechanism for the load-bearing angle steel of a transmission tower. Background Technology

[0002] During pole erection, angle steel clamps are needed to fix components to the load-bearing angle steel of the pole. For example, Chinese patent CN217406140U discloses a universal clamp for angle steel towers, which belongs to the field of angle steel tower technology. It includes the main body of the angle steel tower and a drop-out fuse. The main body of the angle steel tower and the drop-out fuse are fixedly connected. However, when using the above-mentioned universal clamp, multiple components need to be moved, which is not very convenient and cannot achieve self-locking.

[0003] Furthermore, some existing technologies have proposed improved grippers. For example, Chinese patent CN119283073A discloses a mechanical gripper structure for a climbing robot of an angle steel tower, including: a shell unit, which includes an outer shell, a mounting plate fixed to one side of the shell, an abutment plate fixed to the side of the shell away from the mounting plate, a triangular groove formed on the side of the abutment plate away from the shell, and rubber protrusions fixed on the inner walls of both sides of the triangular groove; a gripping unit, which includes two through grooves formed in the shell, two rectangular plates disposed inside the shell, and the rectangular plates slidingly fitting in the through grooves, a hook-shaped plate disposed on the side of the rectangular plates away from the shell; a primary control component disposed inside the shell for controlling the movement of the rectangular plates and the hook-shaped plate in the through grooves; and a secondary control component disposed inside the rectangular plates for controlling the movement of the hook-shaped plate toward the rectangular plates. One corner of the angle steel tower is wedged into the triangular groove, and the hook-shaped plate clamps the other two corners of the angle steel tower at the corners of the two hook-shaped plates respectively. However, this mechanical gripper structure has the following drawbacks: 1. The clamping method uses the top corner support and two clamping units to hook the two suspended ends of the angle steel. The clamping units will generate an outward bending moment on the ends of the two side plates that make up the angle steel. Therefore, when a large force is applied, that is, when supporting a large piece of equipment, the angle steel of the tower will be damaged. As the main load-bearing component of the tower, the angle steel will cause serious accidents once it is damaged.

[0004] 2. The two clamping units did not lock properly; they were held in place by a single hook at the two suspended ends of the angle steel, which posed a risk of deformation and detachment.

[0005] 3. Similarly, it cannot self-lock when the power is off. When the power is lost, the relevant equipment is at risk of falling from a height. Summary of the Invention

[0006] The purpose of this invention is to provide a locking mechanism for the load-bearing angle steel of transmission towers in order to solve the above problems.

[0007] The objective of this invention can be achieved through the following technical solutions: A locking mechanism for the load-bearing angle steel of a transmission tower, comprising: A support base, located inside the angle steel, includes a wedge-shaped mating part and a rotating arm connecting part disposed on the wedge-shaped mating part. The wedge-shaped mating part has a first contact surface, a second contact surface, and a sliding mating inclined surface on the side near the angle steel. The wedge-shaped mating part has a through hole arranged along the axis of the angle steel. The first contact surface and the second contact surface are both arranged parallel to the axis of the angle steel, and the included angle between the first contact surface and the second contact surface is the same as the apex angle of the angle steel. The sliding mating inclined surface is inclined from one end near the first contact surface and the second contact surface to the other end in a direction parallel to the axis of the angle steel, toward the side plate away from the angle steel. The through hole is symmetrical about the angle bisector of the apex angle of the angle steel and has a strip-shaped cross-section, which is perpendicular to the axis of the angle steel. A wedge-shaped friction block includes a block body and a lead screw movably connected to the block body at one end. The block body includes a third contact surface, a fourth contact surface, and a sliding inclined surface. The sliding inclined surface and the sliding mating inclined surface are engaged. The third and fourth contact surfaces are both arranged parallel to the axis of the angle steel, and the included angle between the third and fourth contact surfaces is the same as the apex angle of the angle steel. The lead screw is inserted into the through hole. During the process of the wedge-shaped friction block and the support seat moving towards each other along the axis of the angle steel, the block body moves closer to the angle steel under the compression of the wedge-shaped mating part, and the lead screw moves closer to the apex angle of the angle steel along the angle bisector of the apex angle of the angle steel. Two rotating arms, including a first connecting plate and a first pressure plate, each have one end of the first connecting plate rotatably connected to the rotating arm connecting part, and the other end connected to the first end of the first pressure plate. The second end of the first pressure plate of one rotating arm is provided with a locking unit, and the second end of the first pressure plate of the other rotating arm is provided with a locking engagement unit. After the two rotating arms are driven into position toward the top corner axis of the angle steel, the two pressure plates press against the outer sides of the two side plates of the angle steel, and are connected and locked by the locking unit and the locking engagement unit.

[0008] The locking mechanism also includes a screw drive device, which includes a rotating nut and a movable nut seat. The rotating nut is sleeved on the screw and is set on the wedge-shaped mating part through the movable nut seat. When the rotating nut rotates, it drives the wedge-shaped friction block and the support seat to move in opposite directions or in the opposite direction along the axis of the angle steel.

[0009] The movable nut seat includes a nut mounting seat and two bearing seats. The two bearing seats are located on both sides of the through hole. The two sides of the nut mounting seat are provided with first rotating shafts. The two first rotating shafts are rotatably connected to the two bearing seats respectively. The rotating nut is mounted on the nut mounting seat. The first rotating shaft is perpendicular to the axis of the angle steel and perpendicular to the angle bisector of the apex angle of the angle steel.

[0010] The swing arm connecting part includes a plurality of first connecting blocks arranged in a straight line. Each first connecting block is provided with a first mounting hole, a second mounting hole and an equipment mounting hole arranged along the axis of the angle steel. The first connecting plate of the rotating arm is provided with a plurality of lugs, each lug having a through hole. The number of lugs on a single first connecting plate is one less than the number of first connecting blocks. Each lug is inserted between adjacent first connecting blocks, and the through hole on the lug of one rotating arm is aligned with the first mounting hole, while the through hole on the lug of the other rotating arm is aligned with the second mounting hole.

[0011] The axes of all first connecting blocks coincide, the axes of the second mounting holes coincide, and the axes of all equipment mounting holes coincide.

[0012] There are a total of 3 first connecting blocks.

[0013] The sliding fit inclined surface and the sliding inclined surface are both provided in two parts, wherein: The intersection of one sliding fit inclined surface and the first contact surface is perpendicular to the axis of the angle steel, and the intersection of the other sliding fit inclined surface and the second contact surface is perpendicular to the axis of the angle steel. The intersection of one sliding inclined plane and the third contact surface is perpendicular to the axis of the angle steel, and the intersection of another sliding inclined plane and the fourth contact surface is perpendicular to the axis of the angle steel.

[0014] A spike-like protrusion is formed between the two sliding fit inclined surfaces to support the lead screw.

[0015] An arc-shaped chamfer is provided at the junction of the first contact surface and the second contact surface.

[0016] The locking unit and the locking engagement unit adopt a Shibata close-fitting hook structure.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the designed structure of the support base, wedge-shaped friction block, and two rotating arms, the support base and wedge-shaped friction block provide support from the inside of the top corner of the angle steel. In conjunction with the two rotating arms, which surround the angle steel and press the two side plates of the angle steel, the angle steel can be protected from deformation under a large load. On the other hand, the support base and the wedge-shaped friction block are in contact through the shoe surface. Therefore, when the power is lost, the force exerted by the weight of the support base on the wedge-shaped friction block has a component perpendicular to the axis of the angle steel. This component can press the wedge-shaped friction block tightly onto the angle steel, achieving self-locking after the power is lost.

[0018] 2. The use of a screw drive device to drive the wedge friction block to move towards the support seat provides higher control precision. In addition, the design of the movable nut seat can solve the mechanical interference problem of screw tilting caused by the movement of the wedge friction block along the angle bisector of the apex of the angle steel under the screw drive method, thus extending the overall service life.

[0019] 3. The swing arm connection adopts the form of multiple first connecting blocks. Combined with the ear block design, multiple connection points can be provided to avoid the problem of excessive shear force at the joint between the first connecting plate and the swing arm connection caused by the excessive length of the first connecting plate along the angle steel axis.

[0020] 4. Two sliding contact surfaces and two sliding inclined surfaces are provided, and the intersection line with the corresponding contact surface is perpendicular to the axis of the angle steel. This increases the contact area and the pressure component perpendicular to the side plate plane of the angle steel, thereby reducing the bending force of the angle steel and protecting it. In addition, while protecting the angle steel, it can also increase the pressure between the third contact surface, the fourth contact surface and the side plate of the angle steel, thereby increasing the friction and improving the fixing effect and load-bearing capacity of the equipment.

[0021] 5. A spike-like protrusion is formed between the two sliding fit inclined surfaces to support the lead screw, thereby providing a larger support area for the lead screw and extending the distance from the intersection of the lead screw and the edge of the through hole to the rotating nut, thus reducing the risk of radial breakage of the lead screw.

[0022] 6. An arc-shaped chamfer is provided at the junction of the first contact surface and the second contact surface, which can avoid the risk of reduced friction caused by mechanical interference due to the inherent inner chamfer of the load-bearing angle steel. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the rotating arm of the present invention in a disassembled state; Figure 2 This is a top view schematic diagram of the rotating arm of the present invention in a disassembled state; Figure 3 A structural diagram showing one angle of the support base; Figure 4 This is a structural diagram of the support base from another angle; Figure 5 A schematic diagram showing the support from a top-down view; Figure 6 A schematic diagram of the structure of a wedge-shaped friction block at one angle; Figure 7 This is a schematic diagram of the wedge-shaped friction block from another angle. Figure 8 This is a schematic diagram of the rotating arm; Figure 9 This is a schematic diagram of the rotating arm of the present invention in the closed state; The components are: 1. Support base, 2. Wedge-shaped friction block, 3. Rotating arm, 4. Angle steel, 1-1. Wedge-shaped mating part, 1-2. First connecting block, 2-1. Lead screw, 2-2. Block body, 3-1. First connecting plate, 3-2. First pressure plate, 1-1-1. First contact surface, 1-1-2. Second contact surface, 1-1-3. Sliding fit inclined surface, 1-1-4. Through hole, 1-2-1. First mounting hole, 1-2-2. Second mounting hole, 1-2-3. Equipment mounting hole, 2-2-1. Third contact surface, 2-2-2. Fourth contact surface, 2-2-3. Sliding inclined surface, 3-1-1. Ear block. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., 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 the invention and for 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 the invention. Furthermore, the terms "proximal," "distal," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities in the International System of Units (SI), or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.

[0027] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of this invention, it should also 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; 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 invention based on the specific circumstances.

[0029] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0030] A locking mechanism for the load-bearing angle steel of a transmission tower, such as Figure 1 As shown, it includes: The support base 1, located inside the angle steel 4, includes a wedge-shaped mating part 1-1 and a rotating arm connecting part provided on the wedge-shaped mating part 1-1. The wedge-shaped mating part 1-1 has a first contact surface 1-1-1, a second contact surface 1-1-2, and a sliding fit inclined surface 1-1-3 on the side near the angle steel 4. The wedge-shaped mating part 1-1 also has a through hole 1-1-4 arranged along the axial direction of the angle steel 4. The first contact surface 1-1-1 and the second contact surface 1-1-2 are both in contact with the angle steel. The four axes are set in parallel, and the included angle between the first contact surface 1-1-1 and the second contact surface 1-1-2 is the same as the apex angle of the angle steel 4. The sliding fit inclined surface 1-1-3 is inclined from one end near the first contact surface 1-1-1 and the second contact surface 1-1-2 to the other end in a direction parallel to the axis of the angle steel 4, towards the side plate away from the angle steel 4. The through hole 1-1-4 is symmetrical about the angle bisector of the apex angle of the angle steel 4 and has a strip-shaped cross-section, which is perpendicular to the axis of the angle steel 4. The wedge-shaped friction block 2 includes a block body 2-2 and a screw 2-1 movably connected to the block body 2-2 at one end. The block body 2-2 includes a third contact surface 2-2-1, a fourth contact surface 2-2-2, and a sliding inclined surface 2-2-3. The sliding inclined surface 2-2-3 and the sliding fit inclined surface 1-1-3 are fitted together. The third contact surface 2-2-1 and the fourth contact surface 2-2-2 are both parallel to the axis of the angle steel 4, and the included angle between the third contact surface 2-2-1 and the fourth contact surface 2-2-2 is the same as the apex angle of the angle steel 4. The screw 2-1 is inserted into the through hole 1-1-4. During the process of the wedge-shaped friction block 2 and the support seat 1 moving towards each other along the axis of the angle steel 4, the block body 2-2 moves closer to the angle steel 4 under the squeezing of the wedge-shaped fit part 1-1, and the screw 2-1 moves closer to the apex angle of the angle steel 4 along the angle bisector of the apex angle of the angle steel 4. Two rotating arms 3 include a first connecting plate 3-1 and a first pressure plate 3-2. One end of the first connecting plate 3-1 of the two rotating arms 3 is rotatably connected to the rotating arm connecting part, and the other end is connected to the first end of the first pressure plate 3-2. The second end of the first pressure plate 3-2 of one rotating arm 3 is provided with a locking unit, and the second end of the first pressure plate 3-2 of the other rotating arm 3 is provided with a locking engagement unit. After the two rotating arms 3 are driven into position toward the top corner axis of the angle steel 4, the two pressure plates 3-2 press down on the outer sides of the two side plates of the angle steel 4 respectively, and are connected and locked through the locking unit and the locking engagement unit.

[0031] Through the designed structure of support base 1, wedge-shaped friction block 2, and two rotating arms 3, support base 1 and wedge-shaped friction block 2 provide support from the inside of the top corner of the angle steel. In conjunction with the two rotating arms 3, which surround the angle steel and press the two side plates of the angle steel, the angle steel can be protected from deformation under a large load. On the other hand, support base 1 and wedge-shaped friction block 2 are in contact through the shoe surface. Therefore, when the power is lost, the force of the self-weight of support base 1 acting on wedge-shaped friction block 2 has a component perpendicular to the axis of the angle steel. This component can press the wedge-shaped friction block 2 tightly onto the angle steel, achieving self-locking after power loss.

[0032] In some embodiments, the rotation of the rotating arm 3 and the rotating arm connecting part can be achieved by a hinge. In addition, the rotation control of the rotating arm 3 can be achieved by a motor drive or other means.

[0033] In some embodiments, the locking mechanism further includes a lead screw drive device, which includes a rotating nut and a movable nut seat. The rotating nut is sleeved on the lead screw 2-1 and is disposed on the wedge-shaped mating part 1-1 through the movable nut seat. When the rotating nut rotates, it drives the wedge-shaped friction block 2 and the support seat 1 to move in opposite directions or along the axis of the angle steel 4.

[0034] The movable nut seat includes a nut mounting seat and two bearing seats. The two bearing seats are located on both sides of the through hole 1-1-4. The two sides of the nut mounting seat are provided with first rotating shafts. The two first rotating shafts are rotatably connected to the two bearing seats respectively. The rotating nut is set on the nut mounting seat. The first rotating shaft is perpendicular to the axis of the angle steel 4 and perpendicular to the angle bisector of the apex angle of the angle steel 4.

[0035] The use of a screw drive device to drive the wedge friction block 2 to move toward the support base 1 provides higher control precision. In addition, the design of the movable nut seat can solve the mechanical interference problem of screw tilting caused by the movement of the wedge friction block 2 along the angle bisector of the apex of the angle steel under the screw drive method, thus extending the overall service life.

[0036] Furthermore, in some embodiments, the swing arm connecting part includes a plurality of first connecting blocks 1-2 arranged in a straight line, each of the first connecting blocks 1-2 having a first mounting hole 1-2-1, a second mounting hole 1-2-2, and an equipment mounting hole 1-2-3 arranged along the axis of the angle steel 4. The first connecting plate 3-1 of the rotating arm 3 is provided with multiple lugs 3-1-1, each lug 3-1-1 having a through hole. The number of lugs 3-1-1 on a single first connecting plate 3-1 is one less than the number of first connecting blocks 1-2. Each lug 3-1-1 is inserted between adjacent first connecting blocks 1-2, with the through hole on one lug 3-1-1 of the rotating arm 3 aligned with the first mounting hole 1-2-1, and the through hole on the lug 3-1-1 of the other rotating arm 3 aligned with the second mounting hole 1-2-2. The axes of all first connecting blocks 1-2 coincide, the axes of the second mounting holes 1-2-2 coincide, and the axes of all equipment mounting holes 1-2-3 coincide. Rotation is achieved by the rotating shaft passing sequentially through all the first mounting holes 1-2-1 and the through holes on all the lugs on the first connecting plate 3-1 of the corresponding rotating arm 3. Similarly, the rotation of the second mounting hole 1-2-2 is achieved in a similar structure. The rotating arm connection adopts the form of multiple first connecting blocks 1-2. Combined with the design of lugs 3-1-1, multiple connection points can be provided to avoid the problem of excessive shear force at the joint between the rotating shaft and the rotating arm connection caused by the excessive length of the first connecting plate 3-1 along the axis of the angle steel 4.

[0037] In this embodiment, there are a total of 3 first connecting blocks 1-2.

[0038] Furthermore, in some embodiments, two sliding inclined surfaces 1-1-3 and two sliding inclined surfaces 2-2-3 are provided, wherein: The intersection of one sliding fit inclined surface 1-1-3 and the first contact surface 1-1-1 is perpendicular to the axis of angle steel 4, and the intersection of another sliding fit inclined surface 1-1-3 and the second contact surface 1-1-2 is perpendicular to the axis of angle steel 4. The intersection of one sliding inclined plane 2-2-3 and the third contact surface 2-2-1 is perpendicular to the axis of angle steel 4, and the intersection of another sliding inclined plane 2-2-3 and the fourth contact surface 2-2-2 is perpendicular to the axis of angle steel 4.

[0039] Two sliding inclined surfaces 1-1-3 and 2-2-3 are provided, and the intersection line with the corresponding contact surface is perpendicular to the axis of the angle steel. This increases the contact area and the pressure component perpendicular to the side plate plane of the angle steel, thereby reducing the bending force of the angle steel and protecting it. In addition, while protecting the angle steel, it can also increase the pressure between the third contact surface 2-2-1, the fourth contact surface 2-2-2 and the side plate of the angle steel, thereby increasing the friction and improving the fixing effect and load-bearing capacity of the equipment.

[0040] Furthermore, in some embodiments, a spike-like protrusion 1-1-3-1 is formed between the two sliding fit inclined surfaces 1-1-3 to support the lead screw 2-1, thereby providing a larger support area for the lead screw and extending the distance from the intersection of the lead screw and the edge of the through hole 1-1-4 to the rotating nut portion, thereby reducing the risk of radial breakage of the lead screw.

[0041] In this embodiment, an arc-shaped chamfer is provided at the junction of the first contact surface 1-1-1 and the second contact surface 1-1-2.

[0042] In this embodiment, the locking unit and the locking engagement unit adopt the Shibata close-fitting hook structure.

[0043] Through the above design, this embodiment provides sufficient support for pole erection without damaging the angle steel, thus expanding the applicability of the angle steel locking mechanism. Generally, the rotating arm 3 can be driven hydraulically or electrically. The rotating arm 3 can lock the angle steel, and the two rotating arms 3 are locked together by a Shibata-style close-fitting hook. The third contact surface 2-2-1 and the fourth contact surface 2-2-2 of the wedge-shaped friction block 2 should have sufficient friction coefficients to provide adequate frictional force.

Claims

1. A locking mechanism for the load-bearing angle steel of a transmission tower, characterized in that, include: The support base (1), the wedge-shaped friction block (2) and the two rotating arms (3) are located inside the angle steel (4). The support base (1) includes a wedge-shaped mating part (1-1) and a rotating arm connecting part provided on the wedge-shaped mating part (1-1). The wedge-shaped mating part (1-1) is provided with a first contact surface (1-1-1), a second contact surface (1-1-2) and a sliding mating inclined surface (1-1-3) on the side near the angle steel (4). The wedge-shaped mating part (1-1) is provided with a through hole (1-1-4) arranged along the axial direction of the angle steel (4). The wedge-shaped friction block (2) includes a block body (2-2) and a lead screw (2-1) movably connected to the block body (2-2) at one end. The block body (2-2) includes a third contact surface (2-2-1), a fourth contact surface (2-2-2), and a sliding inclined surface (2-2-3). The sliding inclined surface (2-2-3) and the sliding fit inclined surface (1-1-3) are fitted together. The third contact surface (2-2-1) and the fourth contact surface (2-2-2) are both arranged parallel to the axis of the angle steel (4), and the included angle between the third contact surface (2-2-1) and the fourth contact surface (2-2-2) is the same as the apex angle of the angle steel (4). With the same size, the lead screw (2-1) is inserted into the through hole (1-1-4). During the process of the wedge friction block (2) and the support seat (1) moving towards each other along the axis of the angle steel (4), the block body (2-2) moves closer to the side of the angle steel (4) under the pressure of the wedge mating part (1-1), and the lead screw (2-1) moves closer to the apex of the angle steel (4) along the angle bisector of the apex of the angle steel (4). After the two rotating arms (3) are driven to the apex of the angle steel (4) and are in place, they press down on the outer side of the two side plates of the angle steel (4) respectively, and are connected and locked by the locking unit and the locking mating unit.

2. The locking mechanism for the load-bearing angle steel of a transmission tower according to claim 1, characterized in that, The wedge-shaped fitting part (1-1) is provided with a through hole (1-1-4) arranged along the axis of the angle steel (4). The first contact surface (1-1-1) and the second contact surface (1-1-2) are both arranged parallel to the axis of the angle steel (4), and the included angle between the first contact surface (1-1-1) and the second contact surface (1-1-2) is the same as the apex angle of the angle steel (4). The sliding fit inclined surface (1-1-3) is inclined from one end near the first contact surface (1-1-1) and the second contact surface (1-1-2) to the other end in a direction parallel to the axis of the angle steel (4) toward the side plate away from the angle steel (4). The through hole (1-1-4) is symmetrical about the angle bisector of the apex angle of the angle steel (4) and has a strip-shaped cross-section. The cross-section is perpendicular to the axis of the angle steel (4). The rotating arm (3) includes a first connecting plate (3-1) and a first pressure plate (3-2). One end of the first connecting plate (3-1) of the two rotating arms (3) is rotatably connected to the rotating arm connecting part, and the other end is connected to the first end of the first pressure plate (3-2). The locking unit is located at the second end of the first pressure plate (3-2) of one rotating arm (3), and the locking engagement unit is located at the second end of the first pressure plate (3-2) of the other rotating arm (3). After the two rotating arms (3) are driven into position towards the top corner axis of the angle steel (4), the two pressure plates (3-2) press down on the outer sides of the two side plates of the angle steel (4) respectively, and are connected and locked by the locking unit and the locking engagement unit.

3. The locking mechanism for the load-bearing angle steel of a transmission tower according to claim 1, characterized in that, The locking mechanism also includes a screw drive device, which includes a rotating nut and a movable nut seat. The rotating nut is sleeved on the screw (2-1) and is set on the wedge-shaped mating part (1-1) through the movable nut seat. When the rotating nut rotates, it drives the wedge-shaped friction block (2) and the support seat (1) to move towards each other or in opposite directions along the axis of the angle steel (4).

4. The locking mechanism for the load-bearing angle steel of a transmission tower according to claim 3, characterized in that, The movable nut seat includes a nut mounting seat and two bearing seats. The two bearing seats are located on both sides of the through hole (1-1-4). The two sides of the nut mounting seat are provided with first rotating shafts. The two first rotating shafts are rotatably connected to the two bearing seats respectively. The rotating nut is provided on the nut mounting seat. The first rotating shaft is perpendicular to the axis of the angle steel (4) and perpendicular to the angle bisector of the apex angle of the angle steel (4).

5. The locking mechanism for the load-bearing angle steel of a transmission tower according to claim 1, characterized in that, The boom connecting part includes a plurality of first connecting blocks (1-2) arranged in a straight line. Each first connecting block (1-2) is provided with a first mounting hole (1-2-1), a second mounting hole (1-2-2) and an equipment mounting hole (1-2-3) arranged along the axis of the angle steel (4). The first connecting plate (3-1) of the rotating arm (3) is provided with a plurality of ear blocks (3-1-1). Each ear block (3-1-1) has a through hole. The number of ear blocks (3-1-1) on a single first connecting plate (3-1) is one less than the number of first connecting blocks (1-2). Each ear block (3-1-1) is inserted between each adjacent first connecting block (1-2). The through hole on the ear block (3-1-1) of one rotating arm (3) is aligned with the first mounting hole (1-2-1), and the through hole on the ear block (3-1-1) of the other rotating arm (3) is aligned with the second mounting hole (1-2-2).

6. The locking mechanism for the load-bearing angle steel of a transmission tower according to claim 5, characterized in that, The axes of all first connecting blocks (1-2) coincide, the axes of the second mounting holes (1-2-2) coincide, and the axes of all equipment mounting holes (1-2-3) coincide.

7. The locking mechanism for the load-bearing angle steel of a transmission tower according to claim 1, characterized in that, The sliding inclined surface (1-1-3) and the sliding inclined surface (2-2-3) are each provided in two parts, wherein: The line of intersection of a sliding fit inclined surface (1-1-3) and the first contact surface (1-1-1) is perpendicular to the axis of the angle steel (4), and the line of intersection of another sliding fit inclined surface (1-1-3) and the second contact surface (1-1-2) is perpendicular to the axis of the angle steel (4); The intersection of a sliding inclined plane (2-2-3) and a third contact surface (2-2-1) is perpendicular to the axis of the angle steel (4), and the intersection of another sliding inclined plane (2-2-3) and a fourth contact surface (2-2-2) is perpendicular to the axis of the angle steel (4).

8. The locking mechanism for the load-bearing angle steel of a transmission tower according to claim 1, characterized in that, A spike-like protrusion (1-1-3-1) is formed between the two sliding fit inclined surfaces (1-1-3) to support the lead screw (2-1).

9. A locking mechanism for the load-bearing angle steel of a transmission tower according to claim 1, characterized in that, An arc-shaped chamfer is provided at the junction of the first contact surface (1-1-1) and the second contact surface (1-1-2).

10. A locking mechanism for the load-bearing angle steel of a transmission tower according to claim 1, characterized in that, The locking unit and the locking engagement unit adopt a Shibata close-fitting hook structure.

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