Auxiliary connection device for a power transmission line tower

Abstract

The embodiment of the application provides a kind of auxiliary connecting device for transmission line tower, including: installation part, limiting piece and connecting part, installation part has two installation arms, installation slot is between installation arm, the installation port of installation slot is structured between the installation end of installation arm, and the cross arm timber of tower is installed in installation slot via installation port.Limiting piece is detachably arranged on installation arm, limiting piece can extend into installation slot and abut on cross arm timber, to limit the movement of cross arm timber.Connecting part is arranged on the installation end of one installation arm, and connecting part extends in the direction away from installation arm, and connecting part is used to install hand-operated hoist.The device provided by the application, the cross arm timber can be quickly fitted into the installation slot via the installation port, to realize convenient installation, by setting the detachable limiting piece to be able to extend into the installation slot and abut on the cross arm timber, so that the device can flexibly adapt to cross arms of different thicknesses and provide active and reliable clamping force.

Description

Technical Field

[0001] This application relates to the field of power transmission line maintenance tools, and in particular to an auxiliary connection device for power transmission line towers. Background Technology

[0002] During the maintenance of power transmission lines, workers often need to set up temporary hanging points on the crossarms of the towers to suspend tools such as lever hoists to replace insulator strings or lift conductors.

[0003] Currently, the common method of attachment points involves winding a steel wire rope around the crossarm to form a loop, and then hooking the lever hoist onto the loop. However, this method has problems such as difficulty in adjusting the attachment point length, easy wear and breakage of the steel wire rope, and the need for regular maintenance. In addition, some rigid attachment point devices have been proposed, but existing devices are usually complex in structure, have poor adaptability to different specifications of crossarms, or are not convenient to install and disassemble, affecting work efficiency. Summary of the Invention

[0004] In view of this, this application aims to provide an auxiliary connection device for transmission line towers, which solves the problems of complex structure, poor adaptability to crossarms of different specifications, or inconvenient installation and disassembly, thus affecting work efficiency.

[0005] This application provides an auxiliary connection device for transmission line towers, comprising: a mounting part, a limiting member, and a connecting part. The mounting part has two mounting arms with a mounting groove between them. An mounting opening for the mounting groove is formed between the mounting ends of the mounting arms. The crossarm of the tower is mounted in the mounting groove through the mounting opening. The limiting member is detachably mounted on the mounting arm and can extend into the mounting groove and abut against the crossarm to restrict its movement. The connecting part is located on the mounting end of one of the mounting arms and extends away from the mounting arm. The connecting part is used to mount a lever hoist.

[0006] In some embodiments, the two mounting arms include a first mounting arm and a second mounting arm connected together. The connecting portion includes a connecting body and a connecting opening, with the connecting body disposed on the mounting end of the second mounting arm. The connecting opening is disposed on the connecting body, through which the lever hoist is connected to the connecting body.

[0007] In some embodiments, the connecting body includes two connecting arms and a connector extending in a direction away from the second mounting arm, with a connecting opening formed between the connecting arms. The connector is detachably connected to each of the two connecting arms, and the lever hoist passes through the connecting opening and connects to the connector.

[0008] In some embodiments, the connecting arm includes a connecting surface facing away from the first mounting arm, the first mounting arm including a mounting surface facing the second mounting arm. The distance between the connecting surface and the mounting surface increases along a direction away from the second mounting arm.

[0009] In some embodiments, the connecting body includes a bent member, the two ends of which are respectively connected to the mounting ends of the second mounting arm, and a connection opening is formed between the bent member and the second mounting arm.

[0010] In some embodiments, at least a portion of the mounting portion and the connecting portion are integral structures.

[0011] In some embodiments, the bottom of the mounting groove includes an arcuate surface for contacting the crossarm tower material.

[0012] In some embodiments, the mounting arm extends along a first direction. At least one of the two mounting arms has a mounting hole, the axis of which forms an angle α with the first direction, satisfying 10°≤α≤90°.

[0013] In some embodiments, the number of mounting holes is at least two, and the two mounting holes are spaced apart on one of the two mounting arms.

[0014] In some embodiments, the auxiliary connection device further includes an anti-detachment guide disposed on the wall of the other of the two mounting arms facing the mounting groove. The anti-detachment guide is used to guide the crossarm tower material into the mounting groove and restrict the crossarm tower material from moving away from the mounting groove.

[0015] Compared with the prior art, the beneficial effects of this application are: This application, by setting two mounting arms with mounting openings and mounting slots, allows the crossarm tower material to be quickly inserted into the mounting slot through the mounting opening, achieving convenient installation. By setting the detachable limiting component to extend into the mounting slot to abut against the crossarm tower material, the device can flexibly adapt to crossarms of different thicknesses and provide active and reliable clamping force. At the same time, by setting the connecting part at the mounting end of one mounting arm and extending it outward, when the lever hoist applies pulling force, the device produces a tightening effect on the crossarm, further enhancing the stability of the fixation. It effectively solves the technical problems of difficult adjustment of wire rope hanging point length and easy wear in related technologies, as well as the complex structure, poor adaptability, and easy loosening of existing rigid hanging point devices, significantly improving the efficiency and safety of transmission line maintenance operations.

[0016] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is one of the structural schematic diagrams of an auxiliary connection device provided in an embodiment of this application; Figure 2 A second schematic diagram of the auxiliary connection device provided in one embodiment of this application; Figure 3 One of the structural schematic diagrams of an auxiliary connection device installed on a crossarm tower material according to an embodiment of this application; Figure 4 A second schematic diagram of an auxiliary connection device installed on a crossarm tower material according to an embodiment of this application; Figure 5 One of the structural schematic diagrams of an auxiliary connection device provided in another embodiment of this application; Figure 6 A second schematic diagram of the auxiliary connection device provided in another embodiment of this application; Figure 7 The third schematic diagram of the auxiliary connection device provided for another embodiment of this application.

[0019] Explanation of reference numerals in the attached figures: 1. Mounting section, 11. Mounting port, 12. Mounting slot, 131. First mounting arm, 132. Second mounting arm, 14. Mounting hole. 2. Connecting part; 21. Connecting body; 22. Connecting opening; 23. Connecting piece; 24. Bending piece. 3 limiting components; 4. Crossbeam tower materials. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0022] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0023] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0024] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0025] This application provides an auxiliary connection device for transmission line towers. Optionally, the auxiliary connection device provided in this application is used as a temporary auxiliary attachment point during maintenance work on 35kV concrete tension poles.

[0026] like Figures 1 to 4 As shown, the auxiliary connection device provided in this application includes a mounting part 1, a limiting member 3, and a connecting part 2.

[0027] Among them, such as Figure 1 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the mounting part 1 has two mounting arms arranged opposite each other, and the hollow area between the two mounting arms is a mounting groove 12. The distance between the two mounting arms is the width of the mounting groove 12, and the width of the mounting groove 12 is greater than the thickness of the crossarm tower 4 in order to accommodate the crossarm tower 4.

[0028] The mounting ends of the mounting arm form a mounting opening 11 for the mounting groove 12. The mounting opening 11 is the entrance to the mounting groove 12, allowing the crossarm tower material 4 to enter the mounting groove 12 from the outside.

[0029] During installation, the mounting port 11 of the mounting part 1 is first aligned with the edge of the crossarm tower 4, so that the crossarm tower 4 can slide into the mounting groove 12 along the mounting port 11, thereby achieving the initial positioning of the device and the crossarm tower 4.

[0030] Among them, such as Figure 3 As shown, the limiting member 3 is detachably mounted on the mounting arm. The limiting member 3 can extend into the mounting groove 12 and abut against the crossarm tower 4 to restrict the movement of the crossarm tower 4. The limiting member 3 can be a fixing bolt, pin, etc. The operator can choose whether to install the limiting member 3 and the depth to which it extends into the mounting groove 12 based on the site conditions. Specifically, the limiting member 3 can extend from the outside of the mounting arm into the mounting groove 12 and directly abut against the surface of the crossarm tower 4. Through the positive pressure generated by the abutment, the limiting member 3 presses the crossarm tower 4 tightly against the inner wall of the mounting groove 12 or another mounting arm, thereby preventing the crossarm tower 4 from sliding or detaching within the mounting groove 12. It should be noted that the contact between the limiting member 3 and the crossarm tower 4 can be point contact, line contact, or surface contact.

[0031] Optionally, the limiting member 3 is provided in correspondence with the mounting arm, that is, each mounting arm is provided with at least one limiting member 3.

[0032] Optionally, the limiting member 3 is provided for one of the two mounting arms, that is, one mounting arm is provided with at least one limiting member 3, and the other mounting arm is not provided with a limiting member 3. When the limiting member 3 extends into the mounting groove 12 through one mounting arm and abuts against the first side of the crossarm tower 4, the second side of the crossarm tower 4 opposite to the first side will contact the other mounting arm, thereby achieving the clamping of the crossarm tower 4 between the limiting member 3 and the other mounting arm.

[0033] The connecting part 2 is disposed on the mounting end of a mounting arm, that is, the connecting part 2 is installed at the end of the mounting arm near the mounting port 11.

[0034] The connecting part 2 extends away from the mounting arm, and its extension direction is approximately parallel to the insertion direction of the crossarm tower 4. Alternatively, the extension direction of the connecting part 2 forms a certain angle with the insertion direction, thereby positioning the connecting part 2 in the outer space of the crossarm tower 4. The connecting part 2 is used to install a lever hoist, and the pulling force of the lever hoist can be transmitted to the crossarm tower 4 through the connecting part 2 and the mounting part 1. Optionally, the connecting part 2 is provided with a hanging hole, hanging ring, or lifting lug for connecting with the lever hoist.

[0035] Because this application is equipped with two mounting arms and mounting slots 12, and the mounting port 11 is located at the mounting end, the operator only needs to align the mounting port 11 of this device with the edge of the crossarm tower 4 to easily put the device on the crossarm tower 4. This process does not require threading ropes, tying knots or aligning screw holes, and the operation is simple and quick.

[0036] Furthermore, since the limiting member 3 is detachable and can extend into the mounting groove 12 to abut against the crossarm tower 4, the operator can adjust the length of the limiting member 3 extending into the mounting groove 12 according to the actual thickness of the crossarm tower 4, thus making this device applicable to crossarm tower 4 of different thicknesses. At the same time, the abutting method of the limiting member 3 is not dependent on the specific shape of the crossarm tower 4, making it more versatile. When the limiting member 3 is pressed against the crossarm tower 4, the crossarm tower 4 is clamped between one inner wall of the mounting groove 12 and the limiting member 3, forming a stable fixation. This application generates static friction through actively applied abutting force, which can more reliably resist the vibration and tension generated during the operation of the lever hoist, preventing the device from loosening.

[0037] Meanwhile, the connecting part 2 is located on the mounting end of a mounting arm and extends away from the mounting arm. When the lever hoist is suspended from the connecting part 2 and a pulling force is applied away from the crossarm tower 4, since the connecting part 2 is located at the mounting end, the point of application of the pulling force is close to the mounting opening 11, which makes the entire device tend to lock onto the crossarm tower 4. Specifically, the pulling force will cause the device to rotate slightly around the crossarm tower 4, causing the mounting opening 11 to contract inward, thereby further enhancing the normal pressure and friction between the limiting member 3 and the crossarm tower 4, achieving a safety effect of tightening as it is pulled.

[0038] Optionally, the mounting part 1 and connecting part 2 in this device can be made of rigid metal materials, such as aviation aluminum. This avoids the problems of burrs, bulging, and corrosion that occur when steel wire ropes are used in related technologies. This device does not require oiling after use and can be reused after cleaning, which greatly reduces maintenance costs.

[0039] Optionally, the mounting part 1 and the connecting part 2 are integrally cast from aerospace-grade aluminum. Aerospace-grade aluminum is characterized by low density, high strength, and corrosion resistance. Compared with ordinary steel, it can reduce weight by about 30% to 40%, and does not require oiling for rust prevention. It is particularly suitable for the lightweight requirements of high-altitude operations and the weather resistance requirements of outdoor environments. The integral casting process eliminates any welding or bolt connections between the mounting arm and the connecting part 2, thus eliminating the risk of stress concentration and loosening.

[0040] This application, by setting two mounting arms with mounting openings 11 and mounting slots 12, allows the crossarm tower material 4 to be quickly inserted into the mounting slots 12 through the mounting openings 11, achieving convenient installation. By setting the detachable limiting member 3 to extend into the mounting slots 12 to abut against the crossarm tower material 4, the device can flexibly adapt to crossarm tower materials 4 of different thicknesses and provide active and reliable clamping force. At the same time, by setting the connecting part 2 at the mounting end of one mounting arm and extending it outward, when the lever hoist applies a pulling force, the device produces a tightening effect on the crossarm tower material 4, further enhancing the stability of the fixation. It effectively solves the technical problems of difficult adjustment of wire rope hanging point length and easy wear in related technologies, as well as the complex structure, poor adaptability, and easy loosening of existing rigid hanging point devices, significantly improving the efficiency and safety of transmission line maintenance operations.

[0041] The edge of the mounting opening 11 between the mounting ends of the two mounting arms can be set as an arc chamfer or rounded corner to increase the guiding performance of the opening, prevent the crossarm tower 4 from scratching the surface of the device when it is inserted, and also avoid the device from scratching the crossarm tower 4.

[0042] In some implementations, such as Figure 2 , Figure 5 , Figure 6 and Figure 7 As shown, the two mounting arms include a first mounting arm 131 and a second mounting arm 132 that are connected together. The first mounting arm 131 and the second mounting arm 132 can be integrally formed, welded or bolted together, and are arranged opposite to each other to form the mounting groove 12.

[0043] The connecting part 2 includes a connecting body 21 and a connecting opening 22. The connecting body 21 is disposed on the mounting end of the second mounting arm 132. The connecting opening 22 is disposed on the connecting body 21, and the lever hoist is connected to the connecting body 21 through the connecting opening 22.

[0044] Optionally, the connecting body 21 can be plate-shaped, rod-shaped, ring-shaped, or other geometric shapes to support the connecting opening 22 and provide sufficient structural strength.

[0045] The connection opening 22 is an open area or hole provided on the connecting body 21. Optionally, the shape of the connection opening 22 can be U-shaped, C-shaped, circular, elliptical, or elongated. The connection opening 22 allows the hook of the lever hoist to enter from the open side of the opening without having to pass through the closed hole, thus enabling quick hooking and unhooking. In high-altitude operations, workers often wear gloves and have limited operating space; the open connection structure enables quick hooking and unhooking with one hand, significantly improving work efficiency. When the lever hoist applies pulling force, the hook forms stable contact with the edge of the connection opening 22, transmitting the pulling force to the connecting body 21 and the entire device.

[0046] In some implementations, such as Figures 5 to 7 As shown, the connecting body 21 includes two connecting arms and a connector 23. The two connecting arms extend in a direction away from the second mounting arm 132. The connecting body 21 adopts a bifurcated structure, consisting of two opposing arm-shaped components. The two connecting arms can be independent parts or integrally formed with the second mounting arm 132. The two connecting arms together constitute the main frame of the connecting body 21.

[0047] A connection opening 22 is formed between the connecting arms. The gap between the two connecting arms is the connection opening 22.

[0048] Connector 23 is detachably connected to each of the two connecting arms, and the lever hoist passes through the connecting opening 22 and connects to connector 23. Connector 23 spans between the two connecting arms, providing a fulcrum for the hook of the lever hoist. Connector 23 can be a round rod, bolt, pin, or stud with a nut, etc.

[0049] The connector 23 is detachably connected to each of the two connecting arms. Optionally, the connector 23 has threads at both ends, passes through the through holes on the connecting arms, and is locked with nuts. Optionally, the connector 23 is a cotter pin or a spring pin, inserted into the hole on the connecting arm. The connector 23 is detachably mounted on the connecting arm, allowing operators to install or remove the connector 23 as needed, and also facilitating the replacement of worn connectors 23. During use, the hook of the lever hoist passes through the connecting opening 22 and then connects to the connector 23.

[0050] This application uses two connecting arms and a detachable connector 23 to form an openable and closable hook point structure. When the connector 23 is installed, the connecting opening 22 is closed into a closed loop, meaning the connecting arms and connector 23 form a closed force-bearing frame, preventing the lever hoist's hook from detaching and ensuring high safety. When it is necessary to remove the lever hoist's hook, simply detach the connector 23 to quickly release the lock.

[0051] Furthermore, two connecting arms extend outward from both sides of the second mounting arm 132, with the connector 23 spanning between them. When the lever hoist applies tension, the connector 23 bears shear or bending forces and distributes the force evenly to the two connecting arms, which then transmit it to the second mounting arm 132. This dual-support force distribution method is more stable and less prone to eccentric loading or torsion. Additionally, by replacing the connector 23 with different diameters or lengths, different sizes of lever hoist hooks can be accommodated. Furthermore, the width of the connection opening 22 is designed to be larger than the size of commonly used hooks, ensuring that various hooks can pass through smoothly.

[0052] In some embodiments, the connecting arm includes a connecting surface facing away from the first mounting arm 131. The connecting surface is the surface of the connecting arm facing away from the first mounting arm 131, i.e., the outer surface of the connecting arm. The connecting surface is opposite to the inner surface of the connecting arm, and the distance between them constitutes the wall thickness of the connecting arm. The connecting surface faces the outer space of the crossarm tower 4 during the assembly and use of the device.

[0053] The first mounting arm 131 includes a mounting surface facing the second mounting arm 132. The mounting surface is the surface of the first mounting arm 131 facing the second mounting arm 132, i.e., the inner side surface of the first mounting arm 131. The mounting surface is opposite to the inner surface of the second mounting arm 132, and the space between them forms a mounting groove 12. The mounting surface is a plane or a near-plane, used to contact one side of the crossarm tower 4 or as an abutment reference for the limiting member 3.

[0054] Specifically, along the direction away from the second mounting arm 132, i.e., the direction in which the connecting arm extends outward from the mounting end of the second mounting arm 132, the distance between the connecting surface and the mounting surface increases. The inner surface of the connecting arm is coplanar with the inner surface of the second mounting arm 132, while the connecting surface of the connecting arm is inclined outward relative to the inner surface, causing the thickness of the connecting arm to gradually increase along the extension direction, thereby causing the connecting surface to gradually move away from the mounting surface of the first mounting arm 131.

[0055] The connecting arm of this application adopts a variable cross-section design with a thinner root and thicker ends. The thinner root of the connecting arm reduces stress concentration and improves fatigue resistance, while the thicker ends enhance the local strength of the connecting arm at the mounting point of the connector 23, resisting the load transmitted by the connector 23. Simultaneously, the inclined outer surface structure causes the section modulus of the connecting arm to gradually change along the direction of force, which better conforms to the stress distribution law of a cantilever beam under uniform or concentrated loads, thus improving material utilization efficiency.

[0056] Furthermore, since the inner surface of the connecting arm is coplanar with the inner surface of the second mounting arm 132, the sidewall of the mounting groove 12 remains a continuous and straight inner surface, ensuring that the crossarm tower material 4 can slide and be positioned smoothly in the mounting groove 12 without interference or jamming due to structural changes in the connecting arm.

[0057] In some implementations, such as Figures 1 to 4 As shown, the connecting body 21 includes a bending member 24, the two ends of which are respectively connected to the mounting ends of the second mounting arm 132, and a connecting opening 22 is formed between the bending member 24 and the second mounting arm 132.

[0058] The bending component 24 is a bent and shaped member, which can be formed by bending a metal rod, metal plate, or metal tube. The shape of the bending component 24 can be U-shaped, V-shaped, C-shaped, or ring-shaped, etc. The two ends of the bending component 24 are free ends, used to connect with the second mounting arm 132, while the middle part of the bending component 24 is spaced at a certain distance from the second mounting arm 132, forming a space through which the hook of the lever hoist can pass.

[0059] The bent component 24 is a single, integral part, requiring no additional connecting structures, thus reducing the number of parts, manufacturing costs, and assembly time. Furthermore, the bent component 24 can be pre-fabricated and then fixed to the second mounting arm 132 by welding or integral molding, making it suitable for mass production.

[0060] In some embodiments, at least a portion of the mounting part 1 and the connecting part 2 are integral structures. This integral structure allows for a smooth transition between the mounting part 1 and the connecting part 2, uniform material distribution, and continuous transmission of external loads without weak points. It also enhances the device's tensile, bending, and torsional resistance, making it suitable for high-tension applications generated by lever hoists. Optionally, the mounting part 1 and the connecting part 2 can be formed in one piece using processes such as casting or forging, reducing the number of parts, assembly steps, and fasteners, thereby lowering manufacturing costs and time, and making it suitable for mass production.

[0061] Optionally, the mounting part 1 and the connecting part 2 are an integral structure. Specifically, the mounting part 1 and the bending member 24 are an integral structure.

[0062] Optionally, the mounting part 1 and a portion of the connecting part 2 are integrally formed. Specifically, the mounting part 1 and the two connecting arms are integrally formed.

[0063] This application utilizes integral molding processes such as casting, forging, or metal injection molding to achieve a continuous, seamless overall structure between the mounting arm and the connecting body 21. The integrated structure eliminates stress concentration and weak points in the connections, enabling the device to evenly distribute loads when subjected to the high pulling force of a lever hoist, significantly improving structural strength and fatigue resistance, and ensuring operational safety. Simultaneously, the device is more compact and lightweight, reducing the burden of carrying and operating it at heights. The integral molding reduces the types of parts and assembly processes, lowering manufacturing costs and time, making it suitable for mass production. Furthermore, the absence of bolts, welds, and other easily loosened or corroded connecting parts fundamentally improves the device's reliability, enabling maintenance-free use. The integral molding also allows for precise control of complex geometric features such as variable cross-sections and bending shapes, ensuring the accuracy of the connection opening 22 and the regularity of the mounting groove 12.

[0064] In some implementations, such as Figures 1 to 7 As shown, the bottom of the mounting groove 12 includes an arc-shaped surface, which is used to contact the crossarm tower material 4.

[0065] The bottom of the mounting groove 12 refers to the closed end of the mounting groove 12, that is, the end opposite to the mounting port 11. The bottom of the mounting groove 12 is the base area of ​​the mounting arm.

[0066] The curved surface is the part within the mounting groove 12 that directly contacts the crossarm tower 4. When the crossarm tower 4 is inserted into the mounting groove 12 through the mounting port 11 until it reaches the bottom of the groove, the end or side of the crossarm tower 4 will abut against this curved surface. The curved surface provides positioning and stopping for the crossarm tower 4, while also bearing the pressure transmitted from the lever hoist's pulling force. The curved surface disperses the concentrated force into a distributed force, increasing the contact area and reducing the contact pressure, thereby effectively protecting the surface of the crossarm tower 4 and also reducing wear on the device itself.

[0067] In some embodiments, the mounting arm extends along a first direction. The first direction is either from the mounting end to the bottom of the slot, or from the bottom of the slot to the mounting end. The first direction is substantially consistent with the direction in which the crossarm tower 4 is inserted into the mounting slot 12. This first direction is used as a reference direction to define the inclination angle of the axis of the mounting hole 14.

[0068] At least one of the two mounting arms has a mounting hole 14, which is a hole structure that penetrates the wall thickness of the mounting arm. This hole can be a smooth hole or a threaded hole, used to install the limiting member 3. After passing through the mounting hole 14, the end of the limiting member 3 can extend into the mounting groove 12 and contact the crossarm tower material 4. At least one of the two mounting arms may have a mounting hole 14, or both arms may have mounting holes 14.

[0069] The axis of the mounting hole 14 has an angle α with the first direction, which satisfies 10°≤α≤90°.

[0070] The central axis of the mounting hole 14 is a straight line. The minimum angle between the axis of the mounting hole 14 and the first direction is defined as α. The value of α can characterize the degree of inclination of the mounting hole 14. Specifically, when α = 90°, the axis of the mounting hole 14 is perpendicular to the first direction, that is, the axis of the mounting hole 14 is perpendicular to the extension direction of the mounting arm, and the mounting hole 14 is a straight hole. When α < 90°, the axis of the mounting hole 14 is inclined relative to the first direction, that is, the mounting hole 14 is an oblique hole. Optionally, the inclination direction of the mounting hole 14 can be towards the mounting opening 11.

[0071] When the mounting hole 14 is an angled hole with the inclination direction facing the mounting opening 11, the clamping force applied by the limiting member 3 to the crossarm tower 4 is no longer perpendicular to the surface of the crossarm tower 4, but includes a component force pointing towards the mounting opening 11. This component force pushes the crossarm tower 4 towards the bottom of the mounting groove 12, making the crossarm tower 4 fit tightly against the bottom of the groove. At the same time, this component force also restricts the tendency of the entire device to move towards the end of the crossarm tower 4, forming a wedge-locked self-locking mechanism. When the lever hoist applies a pulling force, the crossarm tower 4 is pushed towards the arc-shaped surface of the bottom of the groove, increasing the contact pressure and friction, effectively preventing the device from slipping off; at the same time, the angled hole thread generates additional frictional resistance, enhancing the anti-loosening capability of the limiting member 3 under vibration environment.

[0072] Specifically, if the mounting hole 14 is a threaded hole and α < 90°, and the axis of the limiting member 3 is inclined, the contact surface between the bolt head or nut and the connected part 23 is no longer a plane perpendicular to the bolt axis, but at a certain angle. This non-perpendicular contact generates additional frictional resistance, resisting the bolt from unscrewing due to vibration. Especially in the vibration environment of high-altitude operations, the inclined hole bolt has a better anti-loosening effect. When the limiting member 3 is screwed in obliquely, its clamping force will decompose into a component force pointing towards the bottom of the mounting groove 12, pushing the crossarm tower 4 towards the arc-shaped surface at the bottom of the groove, forming a wedge-tight self-locking. At the same time, the oblique thread can increase the anti-loosening resistance and adapt to the vibration environment at high altitudes.

[0073] After testing, the installation part 1 and the connection part 2 of this device are made of aviation aluminum in one piece, and the limiting part 3 is made of double bolts M10×30. Under the condition of α=75°, it can withstand a static tensile force of 3kN without slippage, with a safety factor of 2.5, which meets the operation requirements for replacing insulators on 35kV lines.

[0074] In some implementations, such as Figure 6 As shown, there are at least two mounting holes 14, which are spaced apart on one of the two mounting arms.

[0075] Two or more mounting holes 14 are made on the same mounting arm, and each mounting hole 14 can independently mount a limiting member 3. Multiple limiting members 3 can simultaneously abut against the same side surface of the crossarm tower material 4, forming multi-point contact. The two mounting holes 14 can be arranged at a certain interval along a first direction. Alternatively, the two mounting holes 14 can be arranged along a second direction different from the first direction.

[0076] Optionally, the spacing can be equidistant or non-equidistant. The spacing arrangement allows the contact points of the limiting member 3 to be distributed at different heights or different longitudinal positions of the crossarm tower material 4.

[0077] All mounting holes 14 are opened on the same mounting arm of the two mounting arms. The crossarm tower 4 is only pressed against by the limiting member 3 from one side, while the other side relies on the inner surface of the other mounting arm as a fixed support surface.

[0078] Optionally, the limiting member 3 includes two fixing bolts, which are respectively installed in two mounting holes 14 on the same mounting arm, and the two mounting holes 14 are spaced apart along the first direction.

[0079] In some embodiments, the auxiliary connection device further includes an anti-detachment guide, disposed on the wall of the other of the two mounting arms facing the mounting groove 12. The anti-detachment guide is used to guide the crossarm tower 4 into the mounting groove 12 and restrict the crossarm tower 4 from moving away from the mounting groove 12.

[0080] An anti-detachment guide is provided on the inner surface of another mounting arm, which provides guidance at the mounting opening 11, allowing the crossarm tower 4 to slide smoothly into the depth of the mounting groove 12 even if the operator operates with one hand or the alignment is inaccurate, thus avoiding jamming caused by tilting. Figure 5 As shown, optionally, the anti-detachment guide includes a bevel or rounded chamfer provided at the mounting opening 11.

[0081] Simultaneously, after the crossarm tower 4 is inserted, it forms a mechanical interlock with it. The anti-detachment guide can prevent the crossarm tower 4 from moving towards the installation port 11, fundamentally preventing the device from slipping off the end of the crossarm tower 4. Optionally, the anti-detachment guide includes a barb, a boss, or a gradually narrowing wedge-shaped surface.

[0082] The anti-detachment guide section simultaneously fulfills the dual functions of guiding the crossarm tower 4 into the mounting slot 12 and restricting the crossarm tower 4 from moving away from the mounting slot 12. During installation, the anti-detachment guide section guides the crossarm tower 4 to smoothly slide into the depth of the mounting slot 12. Even with single-handed operation at height and slight misalignment, no jamming will occur, significantly improving installation convenience. During operation, the anti-detachment guide section and the crossarm tower 4 form a mechanical interlock, effectively preventing accidental movement of the crossarm tower 4 towards the mounting opening 11. Even if the lever hoist is suddenly unloaded or the device is subjected to an upward impact force, it will not slip off the end of the crossarm tower 4, achieving an axial anti-detachment safety function. The anti-detachment guide section complements the limiting component 3. The limiting component 3 provides lateral clamping and anti-torsion, while the anti-detachment guide section provides axial limiting and insertion guidance. Together, they constitute a three-dimensional constraint on the crossarm tower 4, comprehensively improving the connection stability and operational safety between the device and the crossarm tower 4.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An auxiliary connection device for transmission line towers, characterized in that, include: The installation part has two installation arms with an installation groove between them. The installation ends of the installation arms form an installation opening for the installation groove. The crossarm of the tower is installed in the installation groove through the installation opening. A limiting member is detachably mounted on the mounting arm. The limiting member can extend into the mounting groove and abut against the crossarm tower material to restrict the movement of the crossarm tower material. A connecting portion is disposed on the mounting end of one of the mounting arms, the connecting portion extending in a direction away from the mounting arm, and the connecting portion is used to mount a lever hoist.

2. The auxiliary connecting device according to claim 1, characterized in that, The two mounting arms include a first mounting arm and a second mounting arm connected together; The connecting part includes: A connecting body is disposed on the mounting end of the second mounting arm; A connection opening is provided on the connection body, through which the lever hoist is connected to the connection body.

3. The auxiliary connecting device according to claim 2, characterized in that, The connection body includes: Two connecting arms extend in a direction away from the second mounting arm, and the connecting opening is formed between the connecting arms; The connector is detachably connected to each of the two connecting arms, and the lever hoist passes through the connecting opening and is connected to the connector.

4. The auxiliary connecting device according to claim 3, characterized in that, The connecting arm includes a connecting surface facing away from the first mounting arm, and the first mounting arm includes a mounting surface facing the second mounting arm; Specifically, the distance between the connecting surface and the mounting surface increases in the direction away from the second mounting arm.

5. The auxiliary connecting device according to claim 2, characterized in that, The connection body includes: A bent component, the two ends of which are respectively connected to the mounting ends of the second mounting arm, and the connection opening is formed between the bent component and the second mounting arm.

6. The auxiliary connecting device according to any one of claims 1 to 5, characterized in that, At least a portion of the mounting portion and the connecting portion are integral structures.

7. The auxiliary connecting device according to claims 1 to 5, wherein... The bottom of the mounting groove includes an arc-shaped surface, which is used to contact the crossarm tower material.

8. The auxiliary connecting device according to any one of claims 1 to 5, characterized in that, The mounting arm extends along a first direction; At least one of the two mounting arms is provided with a mounting hole, and the axis of the mounting hole has an angle α with the first direction, satisfying 10°≤α≤90°.

9. The auxiliary connecting device according to claim 8, characterized in that, The number of mounting holes is at least two, and the two mounting holes are spaced apart on one of the two mounting arms.

10. The auxiliary connecting device according to claim 9, characterized in that, The auxiliary connection device further includes: An anti-detachment guide is disposed on the wall surface of the other of the two mounting arms facing the mounting groove. The anti-detachment guide is used to guide the crossarm tower material into the mounting groove and restrict the crossarm tower material from moving away from the mounting groove.

Images