Cross arm iron fitting for electric power towers

Abstract

The utility model discloses a kind of cross arm iron accessories for electric power tower, it is related to H02G cable or wire installation technical field, including cross arm iron assembly with hoop ring and cylinder, hoop ring is fixedly installed on the outside of cylinder by bolt, the utility model is cooperated by setting auxiliary installation structure and fixed structure, using the sliding locking mechanism of slider and collet, the controllable locking and release of cross arm body spacing are realized.Collecting, overall size is reduced, it is convenient to vertical hoisting, and worker fetches when worker vertical lifts the cross arm placed between cylinder and worker, cross arm body is slid along slide cavity to maximum spacing position, slider triggers collet and is automatically inserted into bottom hole to complete locking, so that two cross arm body keep standard spacing to facilitate sleeve into electric pole.Both the problem that cross arm is difficult to penetrate in narrow space is solved, and the standard spacing of cross arm when sleeveing into electric pole is ensured, and high-altitude installation operation difficulty is significantly reduced.

Description

Technical Field

[0001] This invention relates to the field of H02G cable or wire installation technology, specifically to a crossarm accessory for power transmission towers. Background Technology

[0002] With the deepening of my country's new energy strategy and the rapid development of smart grid construction, the scale of power infrastructure construction continues to expand. Overhead distribution lines, as an important component of the power system, directly affect the construction progress and power supply service quality of key projects such as new energy grid connection and distribution network upgrades through their installation efficiency and operational reliability. In the field of H02G cable or wire installation technology, the crossarm of the power tower, as a key hardware supporting insulators and conductors, has a significant impact on the entire power line project due to its installation quality and efficiency.

[0003] In existing technology, overhead line crossarms generally adopt a split two-crossbar structure, fixed to concrete poles or towers by clamps and bolts. However, the following technical defects exist during actual installation and construction: In existing technologies, overhead line crossarms generally adopt a split two-crossbar structure, fixed to concrete poles or towers by clamps and bolts. However, a difficult-to-resolve technical contradiction exists during actual installation and construction: On the one hand, the working space at the top of the power tower is extremely narrow. Workers rely on climbing leg straps to straddle one side of the pole, with their torso, safety belt, and climbing leg straps completely filling the gap between the worker and the pole, leaving only a very narrow opening. In order for the crossarm to pass through the narrow space at the top of the pole from a vertically lifted position and fit into the pole, the distance between the two crossarms must be variable during hoisting. Workers can fold the two crossarms inward to reduce the overall size in order to pass smoothly through the narrow gap between themselves and the pole.

[0004] On the other hand, when the crossarm is hoisted to the top of the pole and needs to be fitted onto it, the inconsistent distance between the two crossarm pieces makes the fitting process extremely inconvenient. Workers must manually pry open the two crossarm pieces at a certain angle within a confined space at height, while simultaneously aligning them with the pole for the fitting operation. Due to the significant weight of the crossarm and the restricted posture during high-altitude work, workers struggle to maintain stable control over the spacing and angle of the two crossarm pieces, frequently resulting in misalignment and repeated adjustments. This not only leads to low installation efficiency but also increases the safety risks associated with working at height. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a crossarm iron accessory for power transmission towers, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a crossarm iron accessory for power transmission towers, comprising a crossarm iron assembly, a hoop, and a column, wherein the hoop is fixedly installed on the outside of the column by bolts, the crossarm iron assembly is sleeved on the outside of the column and rests on top of the crossarm iron assembly, and auxiliary installation structures are installed below the crossarm iron assembly and on both sides of the hoop, wherein the surfaces of the auxiliary installation structures are slidably fitted with fixing structures; Each of the crossarm iron assemblies includes a crossarm body, each of the fixing structures includes a U-shaped seat, and each of the auxiliary installation structures includes a base support; The bottom ends of the crossbeams are all inserted into the middle of the U-shaped seats. The bottom of each U-shaped seat is fixedly installed with a slider. The top of each base support is provided with a sliding cavity. The bottom ends of the sliders are all inserted into the sliding cavities. The interior of each base support and located within the sliding cavities is provided with telescopic cavities. Each telescopic cavity is rotatably connected to a threaded rod through a bearing. The outer side of each threaded rod is threadedly connected to a screw seat, and a guide box is fixedly installed on the outer side of the screw seat. The bottom of the inner cavity of the guide box is fixedly installed with a first spring. The top of each first spring is fixedly installed with a clamp, and the top of each clamp is inserted into the sliding cavity.

[0007] Preferably, the top of the card head has an arc structure, the side of the slider is provided with an inclined surface that matches the top of the card head, and the bottom of the slider is provided with a bottom hole that matches the top of the card head.

[0008] Preferably, a transmission cavity is provided at the end of the base away from the telescopic cavity. A rotating shaft is rotatably mounted on the bottom of the transmission cavity via a bearing. A pulley connected by a belt drive is fixedly sleeved on the outside of the rotating shaft and the threaded rod. The top of the rotating shaft extends to the top of the base.

[0009] Preferably, a reset mechanism is installed at the bottom of each of the auxiliary installation structures. The reset mechanism includes a bottom groove. The bottom of each base support has a bottom groove. A support plate is slidably installed in the inner cavity of each bottom groove. A guide post is fixedly installed on the top of each support plate. A guide cavity is opened inside the base support and above the guide post. The top of each guide post extends into the guide cavity. A third spring is fixedly installed at the bottom of each guide cavity. The bottom end of each third spring is fixedly connected to the top end of the guide post.

[0010] Preferably, a rack is fixedly installed at the top of each pallet, and a connecting rod is rotatably installed on one side of each inner cavity of the transmission chamber via a bearing. A bevel gear that meshes with the outer side of each connecting rod and the rotating shaft is fixedly sleeved on each connecting rod. One end of each connecting rod extends into the bottom groove and is equipped with a one-way bearing. A transmission gear is installed on the outer side of each one-way bearing, and the transmission gear engages with the rack.

[0011] Preferably, each of the base supports has a through groove on its side, and a set of the auxiliary installation structures consists of two base supports.

[0012] Preferably, the hoop is composed of two half hoops, which are fitted around the outside of the crossarm iron assembly and are fixed by bolts. Two positioning blocks are fixedly installed on the top of each half hoop, and the positioning blocks pass through the through groove and are inserted into the bottom groove.

[0013] Preferably, the crossarm assembly includes two crossarm bodies, each with a sleeve placed on its inner side. Bolt posts are inserted between the crossarm bodies and between the sleeves, and nuts are threaded onto the outer ends of the bolt posts.

[0014] Preferably, each side of the auxiliary installation structure is equipped with a folding structure, which drives the fixing structure to be fixed to the bottom of the crossbeam.

[0015] Preferably, the folding structure includes a first folding base and a second folding base. The first folding base has a first piston chamber inside, and a first piston rod is slidably installed inside the first piston chamber. The front end of the first folding base has a moving cavity inside, and a push plate is slidably installed inside the moving cavity. One end of the first piston rod is fixedly connected to the surface of the push plate. The front end of the first folding base has a threaded hole, and a stud is threadedly connected inside the threaded hole. One end of the stud is connected to the surface of the push plate through a bearing. An insertion post is fixedly installed on the back of the push plate. Preferably, a positioning cavity is provided at the front end of each of the second folding bases, and a second piston cavity is provided inside the second folding base and at the rear end of the positioning cavity. One end of the insertion post is inserted into the positioning cavity. A second piston post is slidably installed inside the second piston cavity. The front end of the second piston post extends into the positioning cavity and is fixedly installed with a pressure post. A fifth spring is fixedly installed at the rear of each of the positioning cavities. One end of the fifth spring is fixedly connected to the rear end of the pressure post. Preferably, the top of both the first folding base and the second folding base is provided with a tube groove, and a first flexible tube and a second flexible tube are respectively coiled inside the two tube grooves. One end of the first flexible tube extends into the interior of the first piston column, and one end of the second flexible tube extends into the interior of the second piston chamber. Preferably, the bottom ends of several U-shaped seats extend into the corresponding tube grooves; Preferably, a liquid bladder is fixedly installed on the inner sidewall of the U-shaped seat, a locking post is fixedly installed at one end of each liquid bladder, a sixth spring is fixedly installed on the other inner sidewall of the U-shaped seat, one end of each sixth spring is fixedly connected to one end of each locking post, the front end of each locking post is inserted into the inner cavity of the U-shaped seat, and one end of each of the first and second hoses extends into the corresponding liquid bladders. Preferably, the first folding base and the second folding base are connected by a hinge assembly. The hinge assembly includes a fixed base, which is fixedly installed at the bottom of the first folding base. A hinge shaft is rotatably installed inside the fixed base via a bearing. A hinge sleeve is fixedly sleeved on the outside of the hinge shaft. The outside of the hinge sleeve is fixedly connected to the outside of the second folding base. The two ends of the first folding base and the second folding base are respectively fixedly installed with engaging fasteners. The sides of the first folding base and the second folding base are fixedly installed on the surface of the corresponding base.

[0016] This invention provides a crossarm accessory for power transmission towers, which has the following advantages: 1. This invention, through the cooperation of an auxiliary installation structure and a fixing structure, utilizes a sliding locking mechanism between a slider and a locking head to achieve controllable locking and releasing of the crossarm spacing. During the ground pre-installation stage, the locking head is located below the sliding cavity, allowing the crossarm to slide freely and retract, reducing its overall size for easier vertical hoisting and worker handling. When a worker vertically lifts the crossarm placed between the pole and the worker, the crossarm slides along the sliding cavity to its maximum spacing position. The slider triggers the locking head to automatically engage with the bottom hole, locking the two crossarms at a standard spacing for easy insertion into the pole. This solves the problem of difficult insertion of crossarms into confined spaces and ensures a standard spacing between crossarms during pole insertion, significantly reducing the difficulty of high-altitude installation operations.

[0017] 2. This invention adopts a detachable and foldable modular design. After the crossarm is installed, simply turn the stud in the opposite direction to release the locking of the liquid bladder to the locking post, and the accessories can be completely pulled out from under the crossarm iron assembly. The accessories can be folded in half through the hinge assembly, reducing the volume and making it easy to put into a tool bag for carrying and reuse.

[0018] 3. This invention utilizes a linkage design between the reset mechanism and the auxiliary installation structure, employing a positioning block to trigger rack and pinion transmission, to achieve automatic unlocking after the crossarm sleeve is in place. When the crossarm is fitted onto the pole and the positioning block is inserted into the bottom groove, the positioning block pushes the support plate and rack upwards. Through the transmission chain of the transmission gear, bevel gear, and pulley, the threaded rod rotates, causing the guide box to move the clamp downwards and disengage from the bottom hole, automatically releasing the lock on the crossarm body. Workers can then directly tighten the nut to complete the fixation. The entire installation process achieves automated logic of automatic locking during vertical lifting and automatic unlocking of the sleeve, reducing manual operation steps at heights and significantly improving the efficiency of power line construction. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall column structure of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention from a bottom view; Figure 3This is a schematic diagram of the structure of the present invention when the accessory is not installed on the column; Figure 4 This is a cross-sectional view of the internal structure of the base of the present invention; Figure 5 For the present invention Figure 4 Partial structural diagram; Figure 6 This is a schematic diagram of the internal structure of the folding structure of the present invention; Figure 7 This is a schematic diagram of the internal structure of the fixed structure of the present invention; Figure 8 This is a schematic diagram of the hinge assembly structure of the present invention; Figure 9 For the present invention Figure 4 A schematic diagram of the middle part of the structure; Figure 10 This is a schematic diagram of the structure of the present invention when the accessory is located above the hoop.

[0020] In the diagram: 1. Crossarm steel assembly; 101. Crossarm body; 102. Jacket; 103. Bolt post; 104. Nut; 2. Column; 3. Hoop; 4. Positioning block; 5. Auxiliary installation structure; 501. Base support; 502. Through groove; 503. Telescopic cavity; 504. Threaded rod; 505. Guide box; 506. First spring; 507. Collar; 508. Pulley; 509. Rotating shaft; 510. Bevel gear; 511. Transmission cavity; 512. Connecting rod; 513. Transmission gear; 514. Sliding cavity; 6. Reset mechanism; 601. Bottom groove; 602. Guide cavity; 603. Third spring; 604. Guide post; 605. Rack; 606. Support plate; 7. Folding structure; 701. First folding base; 702. First piston column; 703. Push plate; 704. Moving cavity; 706. Stud; 707. First hose; 708. First piston cavity; 709. Insertion column; 710. Second folding base; 711. Positioning cavity; 712. Pressing column; 713. Second piston cavity; 714. Second piston column; 715. Fifth spring; 716. Second hose; 717. Tube groove; 8. Fixing structure; 801. U-shaped seat; 802. Liquid bladder; 803. Sixth spring; 804. Locking post; 805. Sliding block; 806. Bottom hole; 9. Hinge assembly; 901. Hinge shaft; 902. Hinge sleeve; 903. Fixing base; 904. Fixing buckle. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0022] Example 1 Please see Figures 1 to 10 The present invention provides a technical solution: a crossarm accessory for power transmission towers, the overall basic components of which include a crossarm assembly 1, a column 2, a hoop 3, a positioning block 4, an auxiliary installation structure 5, a reset mechanism 6, a folding structure 7, a fixing structure 8, and a hinge assembly 9.

[0023] The crossarm assembly 1 includes two crossarm bodies 101, which are made of equilateral angle steel. The two crossarm bodies 101 are arranged in parallel relative to each other, and each is provided with a sleeve 102 on its inner side. The sleeve 102 is made of steel plate stamping and the inner arc surface matches the outer surface of the column 2. Bolt columns 103 are inserted between the crossarm bodies 101 and between the sleeves 102. Nuts 104 are threaded to the outer end of the bolt column 103. By tightening the nuts 104, the two crossarm bodies 101 can drive the sleeves 102 to hug the column 2.

[0024] The hoop 3 consists of two half hoops, which hug the outside of the column 2 and are fixedly connected by bolts; two positioning blocks 4 are fixedly installed on the top of each half hoop, and the positioning blocks 4 have a rectangular cross section.

[0025] The auxiliary installation structure 5 includes a base 501, which is made of profile extrusion molding and has a rectangular cross-section. A sliding cavity 514 is provided on the top of the base 501, which extends along the length of the base 501 and has a T-shaped cross-section.

[0026] The base 501 has a telescopic cavity 503 located below the sliding cavity 514. The telescopic cavity 503 extends along the length of the base 501 and has a circular cross-section. The telescopic cavity 503 is rotatably connected to a threaded rod 504 through a bearing.

[0027] The threaded rod 504 is threadedly connected to a screw seat on the outside. A guide box 505 is fixedly installed on the outside of the screw seat. The guide box 505 can slide along the axial direction of the telescopic cavity 503. A first spring 506 is fixedly installed at the bottom of the inner cavity of the guide box 505. The first spring 506 is a cylindrical helical compression spring. A chuck 507 is fixedly installed at the top of the first spring 506. The top of the chuck 507 has an arc structure. The top of the chuck 507 extends upward and is inserted into the sliding cavity 514.

[0028] The fixed structure 8 includes a U-shaped seat 801, which is formed by bending steel plate and has a U-shaped cross section. The bottom end of the crossbeam 101 is inserted into the middle of the U-shaped seat 801. A slider 805 is fixedly installed at the bottom of the U-shaped seat 801. The slider 805 has a T-shaped cross section and cooperates with the sliding cavity 514. The bottom end of the slider 805 is inserted into the sliding cavity 514 and can slide along the sliding cavity 514.

[0029] The sliding cavity 514 extends horizontally along the length of the base 501 and is at least partially located below the crossbeam 101; the clamp 507 extends vertically relative to the base 501 and has its top end facing the crossbeam 101; the sliders 805 are evenly spaced along the length of the sliding cavity 514, and each set of auxiliary installation structures 5 is provided with two sliders 805, which are respectively connected to two crossbeams 101.

[0030] The slider 805 has a beveled surface on its side that matches the top of the chuck 507; the bottom of the slider 805 has a bottom hole 806 that matches the top of the chuck 507, and the bottom hole 806 is a circular blind hole.

[0031] The slider 805 is clearance-fitted with the slide cavity 514 and can slide freely along the axial direction of the slide cavity 514; the chuck 507 is clearance-fitted with the inner wall of the guide box 505 and can move up and down along the axial direction of the guide box 505; the first spring 506 is always in a compressed state, providing upward elastic support force for the chuck 507.

[0032] When the slider 805 slides along the slide cavity 514 to directly above the chuck 507, the chuck 507 pops upward under the elastic force of the first spring 506, and the top of the chuck 507 inserts into the bottom hole 806, forming an axial limit and restricting the relative displacement of the slider 805 along the slide cavity 514; when the slider 805 is subjected to axial thrust, the edge of the bottom hole 806 slides along the arc surface of the top of the chuck 507, pushing the chuck 507 downward to compress the first spring 506, and the chuck 507 exits the bottom hole 806, releasing the axial limit.

[0033] Example 2 A transmission cavity 511 is provided at the end of the base 501 away from the telescopic cavity 503. The transmission cavity 511 is a rectangular cavity. A rotating shaft 509 is rotatably mounted on the bottom of the inner cavity of the transmission cavity 511 through a bearing. The top of the rotating shaft 509 extends to the top of the base 501 and is provided with a structure to facilitate the turning of tools.

[0034] Both the rotating shaft 509 and the threaded rod 504 are fixedly fitted with pulleys 508, and the two pulleys 508 are connected by belt drive.

[0035] By turning the top of the rotating shaft 509, the rotating shaft 509 is driven to rotate. Through the pulley 508 and belt drive, the threaded rod 504 is driven to rotate synchronously. When the threaded rod 504 rotates, the threaded drive drives the screw seat and guide box 505 to move axially along the telescopic cavity 503, thereby adjusting the axial position of the chuck 507 in the sliding cavity 514 and changing the locking distance between the two crossbeams 101.

[0036] Example 3 A reset mechanism 6 is installed at the bottom of the auxiliary installation structure 5. The reset mechanism 6 includes a bottom groove 601. The bottom of the bottom support 501 has a bottom groove 601, which is a rectangular groove with the opening facing downward.

[0037] A support plate 606 is slidably installed in the inner cavity of the bottom groove 601. The support plate 606 is made of steel plate and is clearance fit with the inner wall of the bottom groove 601. A guide post 604 is fixedly installed on the top of the support plate 606.

[0038] The bottom support 501 has a guide cavity 602 located above the guide post 604. The guide cavity 602 is a circular blind hole. The top end of the guide post 604 extends into the guide cavity 602 and is clearance-fitted with the inner wall of the guide cavity 602. A third spring 603 is fixedly installed at the bottom of the inner cavity of the guide cavity 602. The third spring 603 is a cylindrical helical compression spring. The bottom end of the third spring 603 is fixedly connected to the top end of the guide post 604 and is always in a compressed state, providing a downward elastic thrust for the support plate 606.

[0039] A rack 605 is fixedly installed on the top of the support plate 606, and the rack 605 extends vertically; a connecting rod 512 is rotatably installed on one side of the inner cavity of the transmission cavity 511 via a bearing.

[0040] Both the connecting rod 512 and the outer side of the rotating shaft 509 are fixedly fitted with meshing bevel gears 510; one end of the connecting rod 512 extends into the bottom groove 601 and is fitted with a one-way bearing, and a transmission gear 513 is installed on the outer ring of the one-way bearing; the transmission gear 513 meshes with the rack 605.

[0041] When the crossarm assembly 1 is fitted into the column 2, the top of the positioning block 4 is inserted into the bottom groove 601, pushing the support plate 606 to move upward, causing the rack 605 and guide post 604 to move upward synchronously, and the guide post 604 compresses the third spring 603; when the rack 605 moves upward, it drives the transmission gear 513 to rotate, which drives the connecting rod 512 to rotate through the one-way bearing. The connecting rod 512 drives the rotating shaft 509 to rotate through the meshing transmission of the bevel gear 510. The rotating shaft 509 drives the threaded rod 504 to rotate through the belt pulley 508, causing the guide box 505 and the chuck 507 to move downward into the telescopic cavity 503, releasing the axial limit on the slider 805.

[0042] When the positioning block 4 exits the bottom groove 601, the third spring 603 pushes the guide post 604 and the support plate 606 to move down and reset, and the rack 605 moves down synchronously, driving the transmission gear 513 to rotate in the opposite direction. Due to the one-way transmission characteristic of the one-way bearing, the transmission gear 513 idles when rotating in the opposite direction, and will not drive the connecting rod 512 and the rotating shaft 509 to rotate in the opposite direction, and the chuck 507 remains in the unlocked position.

[0043] Example 4 The side of the base 501 is provided with a through groove 502, which is a rectangular through groove that runs vertically through the side wall of the base 501; a set of auxiliary installation structures 5 consists of two bases 501, which are respectively set on both sides of the hoop 3 and arranged symmetrically.

[0044] The positioning block 4 passes through the through groove 502 and is inserted into the bottom groove 601. The positioning block 4 and the through groove 502 are in clearance fit and can move relative to each other in the vertical direction of the through groove 502.

[0045] During installation, the auxiliary installation structure 5 moves downward along the axis of the column 2, and the positioning block 4 enters the bottom groove 601 through the through groove 502, triggering the reset mechanism 6 to act. The through groove 502 provides clearance space for the positioning block 4 and also plays a lateral guiding role, ensuring the relative positional accuracy between the auxiliary installation structure 5 and the hoop 3.

[0046] Example 5 The auxiliary installation structure 5 has a folding structure 7 installed on its side. The folding structure 7 includes a first folding base 701 and a second folding base 710.

[0047] The first folding base 701 has a first piston chamber 708 inside, which is a cylindrical cavity; a first piston rod 702 is slidably installed inside the first piston chamber 708, and the first piston rod 702 is clearance-fitted with the inner wall of the first piston chamber 708, and a sealing ring is provided at the piston end.

[0048] The front end of the first folding base 701 has a movable cavity 704, which is a rectangular cavity; a push plate 703 is slidably installed inside the movable cavity 704; one end of the first piston column 702 is fixedly connected to the surface of the push plate 703.

[0049] The front end of the first folding base 701 is provided with a threaded hole, and a stud 706 is threadedly connected inside the threaded hole; one end of the stud 706 is connected to the surface of the push plate 703 through a bearing, and the other end of the stud 706 extends to the outside of the first folding base 701 and is provided with a structure that facilitates twisting.

[0050] An insertion post 709 is fixedly installed on the back of the push plate 703; a positioning cavity 711 is opened at the front end of the second folding base 710, and the positioning cavity 711 is a circular blind hole; one end of the insertion post 709 is inserted into the positioning cavity 711.

[0051] The second folding base 710 has a second piston cavity 713 located at the rear end of the positioning cavity 711. The second piston cavity 713 is a cylindrical cavity. A second piston rod 714 is slidably installed inside the second piston cavity 713. The second piston rod 714 and the inner wall of the second piston cavity 713 are in clearance fit. A sealing ring is provided at the end of the piston.

[0052] The front end of the second piston rod 714 extends into the positioning cavity 711 and is fixedly installed with a pressure rod 712; a fifth spring 715 is fixedly installed in the rear part of the inner cavity of the positioning cavity 711. The fifth spring 715 is a cylindrical helical compression spring; one end of the fifth spring 715 is fixedly connected to the rear end of the pressure rod 712 and is always in a compressed state.

[0053] Both the top of the first folding base 701 and the second folding base 710 are provided with a tube groove 717, which is a semi-circular groove that extends along the length of the base; the first flexible tube 707 and the second flexible tube 716 are respectively coiled inside the two tube grooves 717, and the flexible tubes have good flexibility and pressure resistance.

[0054] One end of the first hose 707 extends into the first piston chamber 708 and communicates with the first piston chamber 708; one end of the second hose 716 extends into the second piston chamber 713 and communicates with the second piston chamber 713.

[0055] The bottom ends of several U-shaped seats 801 extend into the corresponding tube grooves 717; liquid bladders 802 are fixedly installed on the inner side walls of the U-shaped seats 801, and the liquid bladders 802 have good elasticity; a locking post 804 is fixedly installed at one end of each liquid bladder 802.

[0056] A sixth spring 803 is fixedly installed on the other side wall inside the U-shaped seat 801. The sixth spring 803 is a cylindrical helical compression spring. One end of the sixth spring 803 is fixedly connected to one end of the locking post 804 and is always in a compressed state. The front end of the locking post 804 is inserted into the inner cavity of the U-shaped seat 801.

[0057] One end of the first hose 707 and the second hose 716 extend into the corresponding liquid bladder 802 and communicate with the inner cavity of the liquid bladder 802.

[0058] When the stud 706 is tightened, the stud 706 pushes the push plate 703 and the first piston rod 702 to move into the first piston chamber 708, and presses the hydraulic oil in the first piston chamber 708 into the liquid bladder 802 through the first hose 707, causing the liquid bladder 802 to expand. The expansion of the liquid bladder 802 pushes the locking pin 804 to overcome the elastic force of the sixth spring 803 and extend outward. The front end of the locking pin 804 is inserted into the corresponding hole on the surface of the crossarm 101, realizing the fixed connection between the U-shaped seat 801 and the crossarm 101.

[0059] Simultaneously, when the push plate 703 moves, it pushes the insertion post 709 into the positioning cavity 711, pushes the pressure post 712 and the second piston post 714 into the second piston cavity 713, and presses the hydraulic oil in the second piston cavity 713 into the corresponding side liquid bladder 802 through the second hose 716, so that the liquid bladder 802 on that side expands synchronously, and pushes the corresponding side locking post 804 out.

[0060] When the stud 706 is loosened in the reverse direction, the stud 706 drives the push plate 703 and the first piston rod 702 to move outward, and a negative pressure is formed in the first piston chamber 708. The hydraulic oil in the liquid bladder 802 flows back to the first piston chamber 708 through the first hose 707, and the liquid bladder 802 contracts. The sixth spring 803 pushes the locking pin 804 to retract and exit from the hole on the surface of the crossarm 101, thus releasing the fixed connection.

[0061] At the same time, the insertion post 709 moves outward with the push plate 703, the fifth spring 715 pushes the pressure post 712 and the second piston post 714 to move outward, a negative pressure is formed in the second piston chamber 713, the hydraulic oil in the corresponding side liquid bladder 802 flows back to the second piston chamber 713 through the second hose 716, and the side locking post 804 retracts synchronously.

[0062] Example 6 The first folding base 701 and the second folding base 710 are connected by a hinge assembly 9, which includes a fixing seat 903, which is fixedly installed on the bottom of the first folding base 701.

[0063] The hinge shaft 901 is rotatably mounted inside the fixed base 903 via a bearing; a hinge sleeve 902 is fixedly sleeved on the outer side of the hinge shaft 901; the outer side of the hinge sleeve 902 is fixedly connected to the outer side of the second folding base 710.

[0064] The first folding base 701 and the second folding base 710 are respectively fixedly installed with locking buckles 904 at both ends, and the locking buckles 904 have an elastic locking function; the sides of the first folding base 701 and the second folding base 710 are fixedly installed on the surface of the corresponding base 501.

[0065] When unfolded, the first folding base 701 and the second folding base 710 are on the same horizontal plane, and the fixing buckle 904 is locked to each other to maintain the stability of the unfolded state. When folded for storage, the fixing buckle 904 is released, and the second folding base 710 rotates around the hinge shaft 901 as the rotation center, driving the hinge sleeve 902 to rotate around the hinge shaft 901. The second folding base 710 is folded in half below the first folding base 701, which greatly shortens the overall length and significantly reduces the volume, making it easy to store and carry.

[0066] In use, place the crossbeam 101 and the sleeve 102 on the ground, then pass the bolt post 103 through, and screw the nut 104 onto the end of the bolt post 103. Next, take out this accessory, fold it open, and unfold it. Figure 3 As shown, the bottom of the crossbeam 101 is inserted into the U-shaped seat 801, and then the stud 706 is turned so that one end of the stud 706 pushes the push plate 703 and the first piston column 702 to move, so that the first piston column 702 pushes the liquid inside the first piston chamber 708 through the first hose 707 into the liquid bladder 802. When the push plate 703 moves, the push plate 703 pushes one end of the insertion column 709 into the positioning cavity 711 and pushes the pressure column 712 to move, so that the pressure column 712 pushes the second piston column 714 into the second piston cavity 713, thereby discharging the liquid inside the second piston cavity 713 into the liquid bladder 802 through the second hose 716, causing the liquid bladder 802 to expand. The expansion of the liquid bladder 802 overcomes the supporting force of the sixth spring 803, thereby pushing one end of the locking pin 804 into the corresponding hole on the surface of the crossarm body 101, and installing this accessory on the crossarm iron assembly 1. At this time, the guide box 505 is located below, so that the top of the chuck 507 is not inside the sliding cavity 514. This prevents the chuck 507 from accidentally getting stuck inside the bottom hole 806 during the pole climbing process, causing the position of the crossarm 101 to be locked. This avoids the situation where the position between the two crossarms 101 is fixed and they are at the maximum opening position of the two crossarms 101, which would result in the worker's body filling the operating space between him and the crossarm 1 when taking the crossarm iron assembly 1 off the hoisting rope, leaving no room to accommodate the crossarm iron assembly 1 of this fixed size, thus making it impossible to complete the insertion and pole-mounting action. Next, the worker holds the crossbeam 101 on the left, lifts it up, places it vertically in front of him, and then turns the rotating shaft 509, which drives the pulley 508 to rotate the threaded rod 504, which in turn drives the guide box 505 to move upward, so that the top of the chuck 507 is located inside the slide cavity 514. At this time, the rotating shaft 509 drives the connecting rod 512 and the transmission gear 513 to rotate freely through the bevel gear 510; Then, the worker holds the left side of the crossbeam 101 and lifts the crossbeam assembly 1 vertically. At this time, the upper U-shaped seat 801 moves with the crossbeam 101, causing the slider 805 to slide inside the slide cavity 514. The inclined side of the slider 805 pushes the locking head 507 downwards, so that when the top of the locking head 507 moves below the bottom hole 806, the first spring 506 pushes the top of the locking head 507 into the bottom hole 806, fixing the position of the U-shaped seat 801 and the crossbeam 101. The lower... The crossbeam 101 moves the U-shaped seat 801 by its own weight, causing the U-shaped seat 801 to move the slider 805 inside the slide cavity 514. The slider 805 pushes the clamp 507 down through the inclined side surface. When the top of the clamp 507 moves below the bottom hole 806, the first spring 506 pushes the top of the clamp 507 into the bottom hole 806, fixing the position of the U-shaped seat 801 and the crossbeam 101. At this time, the two crossbeams 101 are at their maximum distance. At this time, the crossarm assembly 1 is placed flat on the outside of the column 2, so that the top of the positioning block 4 is inserted into the bottom groove 601. As the positioning block 4 is inserted, the top of the positioning block 4 pushes the support plate 606 to move upward, and pushes the rack 605 and the guide post 604 to move upward. The guide post 604 squeezes the third spring 603, and the rack 605 drives the transmission gear 513 to drive the connecting rod 512 to rotate through the one-way bearing. The connecting rod 512 drives the rotating shaft 509 to rotate through the bevel gear 510. The rotating shaft 509 drives the threaded rod 504 to rotate through the pulley 508. The threaded rod 504 drives the guide box 505 and the chuck 507 to move downward into the telescopic cavity 503, and the limit on the U-shaped seat 801 is released. At this time, the worker uses a tool to tighten the nut 104, which reduces the distance between the two crossbeams 101 and clamps them to the outside of the column 2 through the two clips 102. At this time, the crossbeam 101 drives the U-shaped seat 801 and the slider 805 to slide along the inside of the threaded rod 504, and the U-shaped seat 801 pulls the first hose 707 and the second hose 716 inside the tube groove 717 to move. After fixing, by reversing the screw 706, one end of the screw 706 drives the push plate 703 and the first piston column 702 to move back to their original positions. The push plate 703 drives the insertion column 709 to move into the moving cavity 704, which causes the fifth spring 715 to push the pressure column 712 to move back to its original positions. The pressure column 712 drives the second piston column 714 to move back to its original positions, so that the liquid inside the liquid bladder 802 is drawn into the first piston cavity 708 and the second piston cavity 713 through the first hose 707 and the second hose 716 respectively. This causes the liquid bladder 802 to contract, which in turn pushes the locking column 804 into the U-shaped seat 801 through the sixth spring 803. One end of the locking column 804 moves out from the hole on the surface of the crossbeam 101, and one end of the insertion column 709 moves out from the positioning cavity 711. Then, the attachments on both sides of the column 2 are moved to the outer sides of the crossarm assembly 1, so that the attachments move out of the position block 4 and the position block 4 is located outside the through groove 502. At this time, the third spring 603 pushes the guide column 604 and the support plate 606 to move down, so that the support plate 606 drives the rack 605 to move down. At this time, the rack 605 cannot drive the connecting rod 512 to rotate through the transmission gear 513 and the one-way bearing. Then, pull this accessory back from under the crossarm assembly 1. At this time, the second folding base 710 can rotate with the hinge pin 901 as the pivot point, so that the second folding base 710 drives the hinge sleeve 902 to rotate outside the hinge pin 901. Fold the second folding base 710 in half under the first folding base 701 and fix it with two fixing buckles 904. Then, put this accessory in your tool bag for later use.

[0067] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A crossarm fitting for power transmission towers, characterized in that: The system includes a crossarm assembly (1), a hoop (3), and a column (2). The hoop (3) is fixedly installed on the outside of the column (2) by bolts. The crossarm assembly (1) is fitted on the outside of the column (2) and rests on top of the crossarm assembly (1). Auxiliary installation structures (5) are installed below the crossarm assembly (1) and on both sides of the hoop (3). Fixing structures (8) are slidably installed on the surface of the auxiliary installation structures (5). Each of the crossarm iron components (1) includes a crossarm body (101), each of the fixing structures (8) includes a U-shaped seat (801), and each of the auxiliary installation structures (5) includes a base support (501). The bottom end of each crossbeam (101) is inserted into the middle of the U-shaped seat (801). A slider (805) is fixedly installed at the bottom of each U-shaped seat (801). A sliding cavity (514) is opened at the top of each base (501). The bottom end of each slider (805) is inserted into the sliding cavity (514). A telescopic cavity (503) is opened inside the base (501) and located in the sliding cavity (514). A threaded rod (504) is rotatably connected to the telescopic cavity (503) through a bearing. A screw seat is threaded to the outside of each threaded rod (504). A guide box (505) is fixedly installed on the outside of the screw seat. A first spring (506) is fixedly installed at the bottom of the inner cavity of the guide box (505). A chuck (507) is fixedly installed at the top of each first spring (506). The top of each chuck (507) is inserted into the sliding cavity (514).

2. The crossarm fitting for power transmission towers according to claim 1, characterized in that: The top of the card head (507) is an arc structure, the side of the slider (805) is provided with a slope that matches the top of the card head (507), and the bottom of the slider (805) is provided with a bottom hole (806) that matches the top of the card head (507).

3. The crossarm fitting for power transmission towers according to claim 1, characterized in that: The bottom support (501) has a transmission cavity (511) at the end away from the telescopic cavity (503). The bottom of the inner cavity of the transmission cavity (511) is rotatably mounted with a rotating shaft (509) through a bearing. The rotating shaft (509) and the outer side of the threaded rod (504) are both fixedly fitted with a pulley (508) connected by a belt drive. The top of the rotating shaft (509) extends to the top of the bottom support (501).

4. The crossarm fitting for power transmission towers according to claim 3, characterized in that: The bottom of each auxiliary installation structure (5) is equipped with a reset mechanism (6). The reset mechanism (6) includes a bottom groove (601). The bottom of each base support (501) is provided with a bottom groove (601). A support plate (606) is slidably installed in the inner cavity of the bottom groove (601). A guide post (604) is fixedly installed on the top of each support plate (606). A guide cavity (602) is provided inside the base support (501) and above the guide post (604). The top of each guide post (604) extends into the guide cavity (602). A third spring (603) is fixedly installed at the bottom of the inner cavity of each guide cavity (602). The bottom end of each third spring (603) is fixedly connected to the top end of the guide post (604).

5. The crossarm fitting for power transmission towers according to claim 4, characterized in that: The top of each pallet (606) is fixedly equipped with a rack (605). A connecting rod (512) is rotatably installed on one side of the inner cavity of each transmission chamber (511) via a bearing. A bevel gear (510) is fixedly sleeved on the outer side of each connecting rod (512) and the rotating shaft (509). One end of each connecting rod (512) extends into the bottom groove (601) and is equipped with a one-way bearing. A transmission gear (513) is installed on the outer side of each one-way bearing, and the transmission gear (513) is engaged with the rack (605).

6. The crossarm fitting for power transmission towers according to claim 1, characterized in that: Each of the base supports (501) has a through groove (502) on its side, and a set of the auxiliary installation structures (5) consists of two base supports (501).

7. The crossarm fitting for power transmission towers according to claim 1, characterized in that: The hoop (3) consists of two half hoops. The two half hoops hug the outside of the crossarm iron assembly (1) and are fixed by bolts. Two positioning blocks (4) are fixedly installed on the top of each half hoop. The positioning blocks (4) pass through the through groove (502) and are inserted into the bottom groove (601).

8. The crossarm fitting for power transmission towers according to claim 1, characterized in that: The auxiliary installation structure (5) is equipped with a folding structure (7) on each side, and the fixing structure (8) is fixed to the bottom of the crossbeam (101) by driving the folding structure (7).

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