Reinforced cross arm holding fitting for electric overhead line

Abstract

The utility model discloses a kind of reinforcing cross arm holding hardware for electric overhead line, including cross arm body and fixing part, the fixing part includes two longitudinal beams and M block, the M block is located between two longitudinal beams, and it is fixedly connected with two longitudinal beams one-to-one, two longitudinal beams are provided with two groups of more than one through hole pair, two groups of more than one through hole pair are distributed in the both sides of cross arm body, and each group of through hole pair includes two through holes, and each group of through hole pair is provided with a U-shaped hoop corresponding to each group of through hole pair.The utility model reinforcing cross arm holding hardware for electric overhead line, by setting the fixing part, two groups of more than one through hole pair are set on the two longitudinal beams of the fixing part, and two more than one U-shaped hoop is used to hold tightly and fix electric pole, two more than one U-shaped hoop can not only be horizontally limited, and when two U-shaped hoops are formed by two different positions and electric pole Limit, two U-shaped hoops and the cross arm body fixed by it can also prevent two U-shaped hoops from yawing and tilting.

Description

Technical Field

[0001] This utility model relates to the field of crossarm support technology, and in particular to a reinforced crossarm holding fitting for overhead power lines. Background Technology

[0002] In power systems, overhead transmission lines bear the core responsibility of transmitting electrical energy from substations over long distances and in large quantities to end users. As a key load-bearing component in the tower structure, the crossarm, through insulator strings, supports the conductors, ensuring sufficient air clearance between energized parts and the tower body, guy wires, and the surrounding environment. Furthermore, the crossarm must withstand the combined effects of multiple operating conditions, including the conductor's own weight, wind pressure, icing, short-circuit electrodynamic forces, and construction and maintenance loads, making it a crucial guarantee for the safe operation of the entire line.

[0003] The common fixing structure for existing crossarms, such as that disclosed in Chinese patent application No. 202223213168.X, adopts a "crossarm with pre-drilled holes - U-shaped clamp single-point locking" method: the U-shaped clamp passes through the pre-drilled holes in the crossarm and wraps around the pole, and is fixed by tightening a single bolt. Under this fixing structure, the bending moment, torque, and longitudinal shear force between the crossarm and the pole all rely on the friction-bearing force transmission between the single U-shaped clamp and the bolt. The force path is singular, and stress is concentrated. Once the longitudinal tension difference occurs on both sides of the line due to sudden changes in wind direction, uneven icing, or broken conductor strands, the crossarm is very likely to undergo irreversible torsion or tilting in the horizontal plane. After the crossarm tilts, the lowest point of the conductor sag shifts towards the tower side, and the minimum electrical clearance between the live conductor and the grounding component rapidly decreases, which can easily lead to flashover, tripping, or even personal injury accidents. Utility Model Content

[0004] The purpose of this utility model is to provide a reinforced crossarm holding fitting for overhead power lines.

[0005] The technical solution to achieve the purpose of this utility model is: a reinforced crossarm holding fitting for overhead power lines, comprising a crossarm body and a fixing component. The fixing component includes two longitudinal beams and a type M-block. The two longitudinal beams are spaced apart and parallel. The type M-block is located between the two longitudinal beams. The two free ends of the type M-block correspond one-to-one with the two longitudinal beams and are fixedly connected. The central groove of the type M-block is an arc shape with the opening facing upward. The crossarm body is horizontally placed and fixed on the two longitudinal beams. The crossarm body and the type M-block are respectively located on both sides of the longitudinal beams. Two or more sets of through holes are opened on the two longitudinal beams. The through holes are distributed on both sides of the crossarm body. Each pair of through holes includes two through holes. The two through holes in each pair of through holes are respectively distributed on two different longitudinal beams. Each pair of through holes is provided with a U-shaped hoop. The two arms of the U-shaped hoop correspond one-to-one with the two through holes of the through hole pair. Each arm of the U-shaped hoop passes through the corresponding through hole. The U-shaped hoop and the central groove of the M-shaped block form a pole sleeve space. Each arm of the U-shaped hoop is threaded with a nut. The nut and the crossarm body are located on the same side of the longitudinal beam. The nut is in close contact with the longitudinal beam.

[0006] Furthermore, the longitudinal beam is plate-shaped, and the crossarm body is welded to the plate surface of the longitudinal beam. The plate-shaped longitudinal beam and the crossarm body not only have a larger welding surface, making the welding and fixing more robust and reliable, but the plate-shaped longitudinal beam is also thinner. After being fixed to the pole, the distance between the crossarm body and the pole is shorter. When the crossarm body is under load, the shear force at the connection between the crossarm body and the pole is smaller, and the connection structure between the crossarm body and the pole is more stable.

[0007] Furthermore, the free end of the M-type block is welded to the adjacent edge of the corresponding longitudinal beam. The welded structure has higher robustness.

[0008] Furthermore, the welding point between the M-shaped block and the longitudinal beam is P1, and the connection point between the crossarm body and the longitudinal beam is P2. P1 and P2 are located on opposite sides of the longitudinal beam. With this structure, after the crossarm is fixed to the pole, the force exerted by the M-shaped block on the longitudinal beam acts positively on the surface of the longitudinal beam, and the longitudinal beam positively bears the force of the M-shaped block. The stress concentration factor at the welding point between the M-shaped block and the longitudinal beam is significantly reduced, and the welding point between the M-shaped block and the longitudinal beam is less prone to cracking, splitting, or breakage, maintaining high stability and reliability over a long period.

[0009] Furthermore, there are two type M blocks, spaced apart on both sides of the crossarm body. The number of type M blocks can be one or two. When there are two type M blocks, spaced apart on both sides of the crossarm body, firstly, the spaced-apart arrangement of the two type M blocks provides better stability by limiting the crossarm body at two relatively far points; secondly, the spaced-apart arrangement of the two type M blocks on both sides of the crossarm body, offset from the crossarm body, ensures that the installation of the type M blocks and the crossarm body does not interfere with each other, avoiding the situation where, when the type M blocks and the crossarm body are positioned opposite each other, the installation distance between the crossarm body and the pole is increased to make way for the type M blocks, thus preventing increased shear force at the connection between the crossarm body and the pole. Additionally, the two type M blocks and the two longitudinal beams constitute a hollow fastener, which requires less material, is lightweight, reduces costs, and facilitates transportation and carrying.

[0010] Furthermore, there are two sets of through-hole pairs. The two sets of through-hole pairs are located on both sides of the crossarm body. Each set of through-hole pairs corresponds to one of the two U-shaped clamps. When the two U-shaped clamps are spaced apart and tightly clamped to the pole, they not only form a horizontal limit between the two U-shaped clamps and the pole, but also prevent horizontal swaying. The crossarm body will not tilt. While the structure of the crossarm body is robust and reliable, compared to three or more U-shaped clamps, two U-shaped clamps require lower material costs and are easier to install. In addition, the U-shaped clamps are evenly distributed on both sides of the crossarm body, resulting in better structural balance. Furthermore, the crossarm body is located in the middle, close to the structural center of gravity, further enhancing its stability.

[0011] Furthermore, the through hole is an elongated hole, and the length direction of the through hole is parallel to the length direction of the crossarm body. The through hole can be a round hole or an elongated hole. Compared with a round hole, the elongated hole provides misalignment space for the alignment of the support arm of the U-shaped hoop, so that the U-shaped hoop can be aligned and installed with the through hole without excessive precision, greatly reducing the structural installation requirements.

[0012] Further, the through hole includes a limiting hole and a clearance hole. The clearance hole is located below the limiting hole and communicates with it. The width of the limiting hole is not less than the diameter of the U-shaped hoop's support arm and less than the diameter of the circumscribed circle of the nut. The width of the clearance hole is greater than the diameter of the circumscribed circle of the nut. The support arm of the U-shaped hoop and the nut thereon pass through the clearance hole, and the support arm of the U-shaped hoop is located within the limiting hole. During operation, the support arm of the U-shaped hoop and the nut thereon pass through the clearance hole, the U-shaped hoop moves upward relative to the fixing member, and the support arm of the U-shaped hoop is located within the limiting hole. Then, the nut is rotated so that it is tightly attached to the longitudinal beam. The U-shaped hoop, the pole, and the central groove of the M-shaped block are then tightly attached in sequence, fixing the crossarm body to the pole. With this through-hole structure, the nut does not need to be completely removed from the U-shaped clamp's support arm; it can remain on the U-shaped clamp's support arm. During installation, simply pass the U-shaped clamp's support arm and the nut through the clearance hole, move the U-shaped clamp until the support arm is within the limiting hole, and then tighten the nut. This design avoids the complete removal of the nut from the U-shaped clamp's support arm, preventing loss of the nut after removal and reducing the rotational stroke during tightening, making the tightening operation simpler.

[0013] Furthermore, the U-shaped hoop includes a U-shaped flat section and cylindrical sections extending axially from both ends of the U-shaped hoop. The length direction of the cross-section of the U-shaped flat section is parallel to the length direction of the longitudinal beam. With this structure, when the U-shaped flat section hugs the pole, the contact area with the pole is larger, the friction between the U-shaped flat section and the pole is higher, and the hug between the U-shaped hoop and the pole is more secure.

[0014] This utility model relates to a reinforced crossarm holding fitting for overhead power lines. By setting up the aforementioned fixing member, two or more sets of through holes are opened on the two longitudinal beams of the fixing member. Two or more spaced U-shaped clamps are used to clamp and fix the pole. When the two or more spaced U-shaped clamps clamp and fix the pole, the two or more U-shaped clamps not only provide horizontal restraint, but also, when the two U-shaped clamps form restraints with the pole from two different positions, prevent the two U-shaped clamps and the crossarm body they fix from swaying or tilting, thus avoiding safety problems caused by the tilting of the crossarm body.

[0015] Furthermore, the reinforced crossarm clamping hardware for overhead power lines of this utility model includes two longitudinal beams and the M-shaped block. The M-shaped block features a central groove that engages with the pole, significantly increasing the clamping surface and enhancing structural stability. Simultaneously, the fixing structure of the two longitudinal beams and the crossarm body, with through holes in the two beams, allows the U-shaped clamps to pass through for fixing. This ensures that the tensile force of two or more U-shaped clamps acts on the same fixing component, rather than a portion acting on the fixing component and another portion on the crossarm body. The force is not concentrated at the connection between the fixing component and the crossarm body, preventing cracking due to varying forces from different U-shaped clamp positions. This results in a more robust and reliable installation structure for the crossarm body, the fixing component, and the U-shaped clamps. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the reinforced crossarm holding hardware for overhead power lines according to this utility model; Figure 2 This is a schematic diagram of the main structure of the reinforced crossarm holding hardware for overhead power lines, excluding the U-shaped hoop. Figure 3 This is a bottom view schematic diagram of the reinforced crossarm holding hardware for overhead power lines of this utility model, excluding the U-shaped hoop; Figure 4 This is a three-dimensional structural schematic diagram of the U-shaped hoop of the reinforcing crossarm holding hardware for overhead power lines according to this utility model; Figure 5 yes Figure 4 Schematic diagram of the cross-sectional structure along line AA; Figure 6 This is a three-dimensional structural diagram of the reinforcing crossarm holding hardware for overhead power lines installed on the pole. Figure 7 This is a schematic diagram of the structure of the first embodiment of the through hole of this utility model; Figure 8 This is a schematic diagram of the structure of the second embodiment of the through hole of this utility model; Figure 9 This is a schematic diagram of the main structure of the reinforced crossarm holding fitting for overhead power lines according to the third embodiment of the through hole of this utility model; Figure 10 This is a schematic diagram of the structure of the nut passing through the relief hole in the third embodiment of the through hole of this utility model; Figure 11 This is a schematic diagram of the structure of the nut located in the limiting hole under the third embodiment of the through hole of this utility model. Detailed Implementation

[0017] The preferred embodiment of the reinforced crossarm holding hardware for overhead power lines of this utility model will be described in detail below with reference to the accompanying drawings: like Figures 1 to 6 As shown, a reinforced crossarm holding fitting for overhead power lines includes a crossarm body 1 and a fixing member 2. The fixing member 2 includes two longitudinal beams 21 and a type M block 22. The two longitudinal beams 21 are spaced apart and parallel. The type M block 22 is located between the two longitudinal beams 21. The two free ends 221 of the type M block 22 correspond one-to-one with the two longitudinal beams 21 and are fixedly connected. The central groove 222 of the type M block 22 is an arc shape with the opening facing upward. The crossarm body 1 is horizontally placed and fixed on the two longitudinal beams 21. The crossarm body 1 and the type M block 22 are respectively located on both sides of the longitudinal beams 21. Two or more sets of through holes 3 are opened on the two longitudinal beams 21. The two or more sets of through holes 3 are distributed on the crossarm body 1. On both sides of the crossarm body 1, each set of through holes 3 includes two through holes 31. The two through holes 31 in each set of through holes 3 are respectively distributed on two different longitudinal beams 21. Each set of through holes 3 is provided with a U-shaped hoop 4. The two arms 40 of the U-shaped hoop 4 correspond one-to-one with the two through holes 31 of the through hole pair 3. Each arm 40 of the U-shaped hoop 4 passes through the corresponding through hole 31. A pole sleeve space is formed between the U-shaped hoop 4 and the central groove 222 of the M-shaped block 22. Each arm 40 of the U-shaped hoop 4 is threaded with a nut 5. The nut 5 and the crossarm body 1 are located on the same side of the longitudinal beam 21. The nut 5 is in contact with and fastened to the longitudinal beam 21.

[0018] This utility model relates to a reinforced crossarm holding fitting for overhead power lines. The crossarm body 1 is horizontally placed and fixed to the two longitudinal beams 21 of the fixing member 2. The crossarm body 1 and the fixing member 2 are integrated. The crossarm body 1 is used to support the conductor. The fixing member 2 cooperates with the U-shaped hoop 4 and the nut 5 to fix the crossarm body 1 to the pole 10. The fixing member 2 includes two longitudinal beams 21 and a type M block 22. The longitudinal beams 21 are provided with through holes 3, which cooperate with the U-shaped hoop 4. The central groove 222 of the type M block 22 is an arc shape with the opening facing upward. The central groove 222 of the type M block 22 and the U-shaped hoop 4 form a pole-fitting space. In this space, the central groove 222 of the type M block 22 and the arc-shaped part of the U-shaped hoop 4 fit with the pole 10, limiting the position of the pole 10.

[0019] When this utility model of reinforced crossarm holding hardware for overhead power lines is installed on pole 10, the central groove 222 of the M-type block 22 is aligned with one side of the pole 10, and the U-shaped hoop 4 is aligned with the other side of the pole 10 and fitted over the pole 10. Together with the central groove 222 of the M-type block 22, they enclose the pole 10. Then, the two arms 40 of the U-shaped hoop 4 correspond one-to-one with the two through holes 31 of the through hole pair 3. Each arm 40 of the U-shaped hoop 4 passes through the corresponding through hole 31. Then, the nut 5 is fitted on each arm 40 of the U-shaped hoop 4. The nut 5 is tightly locked to the longitudinal beam 21. The central groove 222 of the M-type block 22, the pole 10 and the U-shaped hoop 4 are tightly attached in sequence, and the central groove 222 of the M-type block 22 and the U-shaped hoop 4 hold the pole 10 tightly between them. After the pole 10 is held tightly, the M-type block 22 and the crossarm body 1, which is fixed together with the M-type block 22, are installed.

[0020] This utility model relates to a reinforced crossarm holding fitting for overhead power lines. By setting up the fixing member 2, two or more sets of through holes 3 are opened on the two longitudinal beams 21 of the fixing member 2. Two or more spaced U-shaped clamps 4 are used to clamp and fix the pole 10. When the two or more spaced U-shaped clamps 4 clamp and fix the pole 10, the two or more U-shaped clamps 4 can not only provide horizontal limitation, but also prevent the two U-shaped clamps 4 and the crossarm body 1 they fix from swaying or tilting when they form a limitation with the pole 10 from two different positions, thus avoiding safety problems caused by the tilting of the crossarm body 1.

[0021] Furthermore, in this utility model of reinforced crossarm holding hardware for overhead power lines, the fixing member 2 includes two longitudinal beams 21 and the M-shaped block 22. The M-shaped block 22, with its central groove 222, engages with the pole 10, significantly increasing the clamping surface and enhancing structural stability. Simultaneously, with the fixing structure of the two longitudinal beams 21 and the crossarm body 1, through holes 3 are opened on the two longitudinal beams 21. When the U-shaped clamps 4 are passed through for fixing, the tension of two or more U-shaped clamps 4 acts on the same fixing member 2, rather than partly on the fixing member 2 and partly on the crossarm body 1. The force is not concentrated at the connection between the fixing member 2 and the crossarm body 1, and the connection between the fixing member 2 and the crossarm body 1 will not crack due to the force exerted by different positions of the U-shaped clamps 4. The installation structure of the crossarm body 1, the fixing member 2, and the U-shaped clamps 4 is more robust and reliable.

[0022] The present invention relates to a reinforced crossarm holding fitting for overhead power lines. Preferably, the longitudinal beam 21 is plate-shaped, and the crossarm body 1 is welded to the plate surface of the longitudinal beam 21. The plate-shaped longitudinal beam 21 and the crossarm body 1 not only have a large welding surface, making the welding and fixing more secure and reliable, but the plate-shaped longitudinal beam 21 is also thinner. After being fixed to the pole 10, the distance between the crossarm body 1 and the pole 10 is shorter. When the crossarm body 1 is under load, the shear force at the connection between the crossarm body 1 and the pole 10 is smaller, and the connection structure between the crossarm body 1 and the pole 10 is more stable.

[0023] In this utility model, a reinforced crossarm holding fitting for overhead power lines is preferably provided, in which the free end 221 of the M-type block 22 is welded to the adjacent edge of the corresponding longitudinal beam 21. This welded structure offers greater robustness.

[0024] This utility model relates to a reinforced crossarm holding fitting for overhead power lines. Preferably, the welding point between the M-shaped block 22 and the longitudinal beam 21 is P1, and the connection point between the crossarm body 1 and the longitudinal beam 21 is P2. P1 and P2 are located on opposite sides of the longitudinal beam 21. With this structure, after the crossarm is fixed to the pole 10, the force exerted by the M-shaped block 22 on the longitudinal beam 21 is applied positively to the surface of the longitudinal beam 21. The longitudinal beam 21 positively bears the force of the M-shaped block 22. The stress concentration coefficient at the welding point between the M-shaped block 22 and the longitudinal beam 21 is significantly reduced. Cracks, splits, or breaks are less likely to occur at the welding point between the M-shaped block 22 and the longitudinal beam 21, ensuring long-term high stability and reliability of the connection.

[0025] The present invention relates to a reinforced crossarm holding fitting for overhead power lines. Preferably, there are two M-blocks 22, which are spaced apart on both sides of the crossarm body 1. The number of M-blocks 22 can be one or two. When there are two M-blocks 22, and they are spaced apart on both sides of the crossarm body 1, on the one hand, the spaced M-blocks 22 limit the crossarm body 1 at two points far apart, resulting in better stability of the crossarm body 1; on the other hand, the spaced M-blocks 22 are offset from the crossarm body 1, ensuring that the installation of the M-blocks 22 and the crossarm body 1 does not interfere with each other. This avoids the situation where, when the M-blocks 22 and the crossarm body 1 are positioned opposite each other, the installation distance between the crossarm body 1 and the pole 10 is increased to make way for the M-blocks 22, which would lead to increased shear force at the connection between the crossarm body 1 and the pole 10. In addition, the two M-blocks 22 and the two longitudinal beams 21 constitute the hollow fastener 2. The fastener 2 requires less material, is lightweight, reduces costs, and is also convenient for transportation and carrying.

[0026] This utility model relates to a reinforced crossarm holding fitting for overhead power lines. Preferably, the number of through-hole pairs 3 is two sets. The two sets of through-hole pairs 3 are located on both sides of the crossarm body 1. The two sets of through-hole pairs 3 correspond to two U-shaped clamps 4. When the two U-shaped clamps 4 are spaced apart and tightly clamped to the pole 10, they not only form a horizontal limit between the two U-shaped clamps 4 and the pole 10, but also prevent horizontal swaying. The crossarm body 1 will not tilt. The structure of the crossarm body 1 is not only strong and reliable, but also requires less material cost and is easier to install than three or more U-shaped clamps 4. In addition, the U-shaped clamps 4 are evenly distributed on both sides of the crossarm body 1, which not only improves the balance of the fixing structure, but also makes the crossarm body 1 more stable as it is located in the middle position, close to the center of gravity of the structure.

[0027] The first embodiment of the through hole 31 of this utility model is as follows: Figure 7 As shown, the through hole 31 is a round hole, and the diameter L1 of the through hole 31 is not less than the diameter R1 of the support arm 40 of the U-shaped hoop 4 and less than the diameter R2 of the circumscribed circle of the nut 5.

[0028] The second embodiment of the through hole 31 of this utility model is as follows: Figure 8 As shown, the through hole 31 is an elongated hole, and its length direction is parallel to the length direction of the crossarm body 1. The width L2 of the through hole 31 is not less than the diameter R1 of the support arm 40 of the U-shaped hoop 4 and less than the diameter R2 of the circumscribed circle of the nut 5. Compared with a round hole, the elongated hole provides misalignment space for the alignment of the support arm 40 of the U-shaped hoop 4, allowing the U-shaped hoop 4 to be aligned and installed with the through hole 31 without requiring excessive precision, thus greatly reducing the structural installation requirements.

[0029] The third embodiment of the through hole 31 of this utility model, such as Figures 9 to 11 As shown, the through hole 31 includes a limiting hole 311 and a relief hole 312. The relief hole 312 is located below the limiting hole 311 and communicates with the limiting hole 311. The width D1 of the limiting hole 311 is not less than the diameter R1 of the support arm 40 of the U-shaped hoop 4 and less than the diameter R2 of the circumscribed circle of the nut 5. The width D2 of the relief hole 312 is greater than the diameter R2 of the circumscribed circle of the nut 5. The support arm 40 of the U-shaped hoop 4 and the nut 5 on it pass through the relief hole 312. The support arm 40 of the U-shaped hoop 4 is located inside the limiting hole 311.

[0030] In the third embodiment of the through hole 31 of this utility model, the width of the relief hole 312 is greater than the diameter R2 of the circumscribed circle of the nut 5, and the nut 5 can pass through the relief hole 312; the width D1 of the limiting hole 311 is not less than the diameter R1 of the support arm 40 of the U-shaped hoop 4 and less than the diameter R2 of the circumscribed circle of the nut 5, and the support arm 40 of the U-shaped hoop 4 can enter the limiting hole 311. At the same time, the nut 5 cannot pass through the limiting hole 311, and the nut 5 can be tightly contacted and locked with the longitudinal beam 21 of the fixing member 2. In addition, in two or more sets of through hole pairs 3, the relief hole 312 of the through hole 31 of the upper through hole pair 3 is a complete hole, and the relief hole 312 of the through hole 31 of the lower through hole pair 3 can be a complete hole or a half hole, such as Figures 9 to 11 As shown.

[0031] In the third embodiment of the through hole 31 of this utility model, during operation, the support arm 40 of the U-shaped hoop 4 and the nut 5 on it pass through the relief hole 312, the U-shaped hoop 4 moves upward relative to the fixing member 2, and the support arm 40 of the U-shaped hoop 4 is located in the limiting hole 311. Then, the nut 5 is rotated so that the nut 5 is tightly attached to the longitudinal beam 21. The U-shaped hoop 4, the pole 10 and the central groove 222 of the M-shaped block 22 are tightly attached in sequence, fixing the crossarm body 1 to the pole 10.

[0032] In the third embodiment of the through hole 31 of this utility model, the nut 5 does not need to be completely removed from the support arm 40 of the U-shaped clamp 4. It can be continuously fitted onto the support arm 40 of the U-shaped clamp 4. During installation, simply pass the support arm 40 of the U-shaped clamp 4 and the nut 5 thereon through the relief hole 312, move the U-shaped clamp 4 so that the support arm 40 of the U-shaped clamp 4 is located within the limiting hole 311, and then tighten the nut 5. This setting avoids the complete removal of the nut 5 from the support arm 40 of the U-shaped clamp 4, which not only prevents the loss of the nut 5 after removal, but also reduces the rotational stroke of the nut 5 during tightening, making the tightening operation of the nut 5 simpler.

[0033] The present invention relates to a reinforced crossarm holding fitting for overhead power lines. Preferably, the U-shaped clamp 4 includes a U-shaped flat section 41 and cylindrical sections 42 extending axially from both ends of the U-shaped clamp 4. The length direction of the cross-section of the U-shaped flat section 41 is parallel to the length direction of the longitudinal beam 21. With this structure, when the U-shaped flat section 41 clamps the pole 10, the contact surface with the pole 10 is larger, the friction between the U-shaped flat section 41 and the pole 10 is higher, and the clamping between the U-shaped clamp 4 and the pole 10 is more secure.

[0034] For those skilled in the art to which this utility model pertains, several simple deductions or substitutions can be made without departing from the concept of this utility model, and all such deductions or substitutions should be considered to fall within the protection scope of this utility model.

Claims

1. A reinforced crossarm holding fitting for overhead power lines, comprising a crossarm body and a fixing component, characterized in that: The fastener includes two longitudinal beams and an M-shaped block. The two longitudinal beams are spaced apart and parallel to each other. The M-shaped block is located between the two longitudinal beams, and its two free ends are fixedly connected to the two longitudinal beams one-to-one. The central groove of the M-shaped block is an arc shape with the opening facing upwards. The crossbeam body is horizontally placed and fixed on the two longitudinal beams. The crossbeam body and the M-shaped block are located on both sides of the longitudinal beams. Two or more sets of through holes are opened on the two longitudinal beams. The two or more sets of through holes are distributed on both sides of the crossbeam body. Each set of through holes... The hole pair includes two through holes. The two through holes in each pair are distributed on two different longitudinal beams. Each pair of through holes is provided with a U-shaped hoop. The two arms of the U-shaped hoop correspond one-to-one with the two through holes of the pair. Each arm of the U-shaped hoop passes through the corresponding through hole. The U-shaped hoop and the central groove of the M-shaped block form a pole-sleeving space. Each arm of the U-shaped hoop is threaded with a nut. The nut and the crossarm body are located on the same side of the longitudinal beam. The nut is in close contact with the longitudinal beam.

2. The reinforced crossarm clamping fitting for overhead power lines according to claim 1, characterized in that: The longitudinal beam is plate-shaped, and the crossbeam body is welded to the plate surface of the longitudinal beam.

3. The reinforced crossarm holding fitting for overhead power lines according to claim 1, characterized in that: The free end of the M-type block is welded to the edge adjacent to the corresponding longitudinal beam.

4. The reinforced crossarm holding fitting for overhead power lines according to claim 3, characterized in that: The welding point between the M-type block and the longitudinal beam is P1, and the connection point between the crossbeam body and the longitudinal beam is P2. P1 and P2 are located on opposite sides of the longitudinal beam.

5. The reinforced crossarm holding fitting for overhead power lines according to claim 1, characterized in that: There are two Class M blocks, which are distributed at intervals on both sides of the crossarm body.

6. The reinforced crossarm holding fitting for overhead power lines according to claim 1, characterized in that: The number of through-hole pairs is two sets.

7. The reinforced crossarm holding fitting for overhead power lines according to claim 1, characterized in that: The through hole is an elongated hole, and the length direction of the through hole is parallel to the length direction of the crossarm body.

8. The reinforced crossarm holding fitting for overhead power lines according to claim 1, characterized in that: The through hole includes a limiting hole and a relief hole. The relief hole is located below the limiting hole and communicates with the limiting hole. The width of the limiting hole is not less than the diameter of the arm of the U-shaped hoop and less than the diameter of the circumscribed circle of the nut. The width of the relief hole is greater than the diameter of the circumscribed circle of the nut. The arm of the U-shaped hoop and the nut on it pass through the relief hole. The arm of the U-shaped hoop is located inside the limiting hole.

9. The reinforced crossarm holding fitting for overhead power lines according to claim 1, characterized in that: The U-shaped hoop includes a U-shaped flat section and cylindrical sections extending axially from both ends of the U-shaped hoop. The length direction of the cross-section of the U-shaped flat section is parallel to the length direction of the longitudinal beam.

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