Crossing frame capable of being folded and stored

Abstract

The crossing frame capable of being folded and stored comprises a sleeve-shaped main rod, a transverse rod, a sliding rail support used for installing a sliding rail, a transverse rod supporting frame, a winding idler wheel wound with a lifting rope, a winding frame and an idler wheel set, the sliding rail support, the idler wheel set and the winding frame are installed in the main rod, and the winding idler wheel is rotatably supported on the winding frame. The lifting rope is led out by the winding roller and connected to the cross rod supporting frame through the roller set, and the winding roller is rotated to wind and unwind the lifting rope to drive the cross rod supporting frame to ascend and descend under the constraint of the sliding rail. The transverse rods are hinged to the transverse rod supporting frame, and when the transverse rod supporting frame ascends to the top end of the main rod, the two transverse rods are converted into a linear unfolding state from a mutually-attached folding state. The device has the beneficial effects that small-space and rapid deployment and recovery are realized, the efficiency of stringing operation is remarkably improved, and the construction difficulty is reduced.

Description

Technical Field

[0001] This invention relates to the field of railway line construction technology, and specifically to a foldable and retractable crossing frame. Background Technology

[0002] Crossing frames are crucial facilities in electrical circuit construction, enabling conductors to safely and smoothly pass over obstacles. The efficiency of their construction significantly impacts the overall efficiency of line construction. Traditional crossing frames typically consist of several independent components, resulting in cumbersome erection processes, large footprints, and significant weight. Therefore, it is necessary to design a new type of folding and unfolding crossing frame. This structure, utilizing a combination of manual labor and gravity-driven unfolding, allows for the rapid deployment of the upper overhead line structure within limited space, thereby reducing time costs. Summary of the Invention

[0003] To address the problems existing in the prior art, the present invention aims to provide a foldable and retractable crossing frame that can be quickly folded and deployed, effectively improving the efficiency of power transmission line stringing operations. It features a small footprint and rapid deployment and recovery. The present invention adopts the following technical solution: The foldable and retractable strut frame includes a sleeve-shaped main rod, two crossbars, a slide rail bracket for mounting slide rails, a crossbar support frame, a winding roller with a suspension rope wound around it, a winding frame, and a roller assembly. The slide rail bracket, roller assembly, and winding frame are installed inside the main rod. The winding roller is rotatably supported on the winding frame. The suspension rope is led out from the winding roller and connected to the crossbar support frame via the roller assembly. By rotating the winding roller, the suspension rope is wound and unwound, driving the crossbar support frame to rise and fall under the constraint of the slide rail. The crossbars are hinged to the crossbar support frame. When the crossbar support frame rises to the top of the main rod, the two crossbars change from a folded state where they are close together to an unfolded state in a straight line.

[0004] A further design of the foldable and retractable strut rack is that the slide rail bracket consists of a mounting ring and a guide rail. The guide rail consists of two channel steels arranged back to back with a gap between them. The two ends of the channel steels are respectively installed on the mounting ring to form a modular lattice structure.

[0005] A further design of the foldable and retractable strut rack is that the crossbar support frame includes a support plate and pulleys, and the support plate is slidably connected to the guide rail via the pulleys.

[0006] A further design of the foldable and retractable crossbar is that each free end of the crossbar is hinged with a two-link rod for erecting the conductor. The two-link rod consists of an erecting rod and a supporting rod. The erecting rod is hinged to the free end of the crossbar, and one end of the supporting rod is hinged to the erecting rod.

[0007] A further design feature of the foldable and retractable cross-train frame is that the crossbar, the erecting rod, and the support rod are all channel steel structures, the erecting rod can be retracted into the crossbar, and the support rod can be retracted into the erecting rod.

[0008] A further design of the foldable and retractable strut frame is that the crossbar also includes a top block with a screw hole; the bottom of the crossbar has a pre-drilled slotted hole for threading screws; the top block is set on the crossbar and is detachably connected to the crossbar by threading screws through the screw hole and the slotted hole; the support rod abuts against the top block and supports the frame rod when the screw slides to abut against the edge of the slotted hole.

[0009] A further design of the foldable and retractable crossover frame is that the roller assembly includes two directional fixed pulleys located at the top of the main pole and a convergence pulley assembly located below the crossbar support frame. The convergence pulley assembly includes two transition fixed pulleys corresponding to the crossbar and two convergence fixed pulleys. The suspension rope wound around the winding wheel passes through the convergence fixed pulley, the transition fixed pulley, and the directional fixed pulley in sequence before being connected to the crossbar support frame.

[0010] A further design feature of the foldable crossover frame is that a pulley is installed on each side of the crossbar support frame, and the crossbar support frame is slidably connected to the slide rail via the pulleys.

[0011] A further design feature of the foldable strut is that the top of the main rod has a slot and a blind groove for positioning and installing the mounting ring, and the slot is adapted to the crossbar in the unfolded state.

[0012] A further design of the foldable strut is that a mounting lug is welded onto the mounting ring, and the mounting lug is mounted on the blind slot of the main rod.

[0013] Compared with the prior art, the beneficial effects of this invention application are as follows: The main pole of the foldable and retractable cross-bracing frame of this invention is manually erected and positioned, and the upper structure is synchronously lifted by rotating a hand-cranked pulley. During the lifting process, the crossbars unfold to both sides under their own weight, thereby achieving a rapid unfolding process, which facilitates quick on-site deployment and adjustment.

[0014] The foldable and retractable overhead line support of this invention achieves rapid deployment and retrieval in a small space through a compact folding-unfolding mechanism, significantly improving the efficiency of overhead line operations and reducing construction difficulty. It can provide effective design reference for related engineering applications. At the same time, the folding design makes transportation and erection more flexible, greatly reducing labor costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the crossing frame structure.

[0016] Figure 2 for Figure 1 The diagram shows a top view of the cross-bracing structure (excluding the crossbars and crossbar support frames).

[0017] Figure 3 for Figure 1 The schematic diagram of the cross-bridge structure shown is a schematic diagram along direction I.

[0018] Figure 4 This is a schematic diagram of the slide rail bracket.

[0019] Figure 5 for Figure 4 The diagram shows a schematic EE cross-sectional view of the slide rail bracket.

[0020] Figure 6 This is a schematic diagram of the sleeve structure.

[0021] Figure 7 for Figure 6 Another perspective view of the schematic diagram of the sleeve structure shown.

[0022] Figure 8 This is a schematic diagram of the crossbar structure.

[0023] Figure 9 This is a schematic diagram of the internal structure of the main rod.

[0024] Figure 10 This is a schematic diagram of the winding frame.

[0025] Figure 11 for Figure 10 The diagram shows a cross-sectional view (HH) of the winding frame.

[0026] Figure 12 This is a schematic diagram of the crossbar structure.

[0027] Figure 13 for Figure 12 The top view of the schematic diagram of the crossbar structure shown. Detailed Implementation

[0028] The technical solutions in the embodiments of the present invention will now be clearly and completely described in conjunction with the accompanying drawings. Example 1

[0029] like Figure 1 , Figure 2 as well as Figure 3The foldable strut frame of this embodiment mainly consists of a sleeve-shaped main rod 1, two crossbars 2, a slide rail bracket 3 for positioning and mounting the slide rail, a crossbar support frame 4, a winding roller 7 with a suspension rope 6 wound around it, a winding frame 5, and a roller assembly 8. The slide rail bracket 3, roller assembly 8, and winding frame 5 are installed inside the main rod 1. The winding roller 7 is rotatably supported on the winding frame 5. The suspension rope 6 is led out from the winding roller and connected to the crossbar support frame 4 via the roller assembly 8. By rotating the winding roller 7, the suspension rope 6 is wound and unwound, driving the crossbar support frame 4 to rise and fall under the constraint of the slide rail. The crossbars 2 are hinged to the crossbar support frame 4. When the crossbar support frame 4 rises to the top of the main rod 1, the two crossbars 2 change from a folded state that is close to each other to an unfolded state that is straight. Example 2

[0030] like Figure 4 , Figure 5 In this embodiment, the foldable and retractable strut rack, based on the first embodiment, has a slide rail bracket 3 composed of mounting rings 32 (34) and guide rails 30. The guide rail 30 consists of two back-to-back channel steels 301 with a gap between them. The two ends of the channel steels are respectively mounted on mounting rings 32 and 34 to form a modular lattice structure. In this embodiment, end plates are welded to the ends of the channel steels 301, and the end plates are fixed to the mounting rings 32 and 34 using high-strength bolts. This embodiment uses two sets of guide rails 30, see [link to relevant documentation]. Figure 5 This lattice-structured component modularizes the slide rail bracket and its positioning and installation components, which helps to quickly position and install the slide rail within the main rod.

[0031] like Figure 8 In this embodiment, the crossbar support frame 4 consists of a support plate 41 and a pulley 42. The support plate 41 is slidably connected to the guide rail 30 via the pulley 42.

[0032] like Figure 12 , 13 Each free end of the main body 20 of the crossbar 2 is hinged with a two-link rod for erecting conductors. The two-link rod consists of an erecting rod 22 and a supporting rod 23. The erecting rod 22 is hinged to the free end of the main body 20 of the crossbar, and one end of the supporting rod 23 is hinged to the erecting rod 22.

[0033] The main body 20, the erecting rod 22, and the supporting rod 23 of the crossbar are all channel steel structures. The erecting rod 22 can be stored inside the main body 20 of the crossbar, and the supporting rod 23 can be stored inside the erecting rod 22.

[0034] In this embodiment, to enable rapid and efficient installation of the conductor when the crossbar 2 is in the extended state, a top block 24 with screw holes is added to the crossbar 2. A slotted hole 25 for screws is pre-drilled at the bottom of the crossbar. The top block 24 is mounted on the crossbar, and a bolt assembly is inserted into the screw hole and slotted hole 25 of the top block 24 to achieve a detachable connection with the crossbar. When the crossbar is in the extended state, the mounting rod 22 and support rod 23 are rotated, and the top block is placed on the main body 20 above the slotted hole 25. The bolt assembly is then inserted, and the support rod 23 abuts against the top block 24. When the screw slides to abut against the edge of the slotted hole, the support rod supports the mounting rod.

[0035] The roller assembly 8 includes two directional fixed pulleys 81 located at the top of the main rod and a convergence pulley assembly located below the crossbar support frame. The convergence pulley assembly includes two transition fixed pulleys 82 corresponding to the crossbar and two convergence fixed pulleys 83; the suspension rope 6, wound around the winding wheel 7, passes sequentially through the convergence fixed pulleys 83, the transition fixed pulleys 82, and the directional fixed pulleys 81 before being connected to the crossbar support frame 4.

[0036] In this embodiment, the fixed pulley 82 and the two converging fixed pulleys 83 are all installed in the sleeve 35 via connecting lugs. Correspondingly, the sleeve 35 has blind grooves and through holes for fixing the connecting lugs. Figure 6 , Figure 7 The sleeve 35 is welded to the mounting ring 34 to form an integral unit for quick installation and positioning. Since the sleeve 35 and the slide rail bracket 3 are designed as an integral unit, the installation of the channel steel 301 is not convenient. Therefore, in this embodiment, a notch 352 is provided on the sleeve 35 so that a wrench can be inserted into the sleeve to install and adjust the channel steel 301 on the mounting ring 34.

[0037] A pulley 43 is installed on each of the two sides of the crossbar support frame 4. In this embodiment, the pivot of the pulley 43 is supported on the support plate 41 by a support base 42. The two ends of the support plate 41 are respectively provided with mounting holes 412 for mounting the support base 42; the middle of the support plate 41 is provided with a through hole 411 for weight reduction. The crossbar support frame 4 is slidably connected to the slide rail 30 through the pulleys 43.

[0038] The top of the main rod 1 has a slot 11 (see...) Figure 3 ), and the blind groove 13 for positioning and installing the mounting ring 32 (see Figure 9 The system includes a blind groove 12 for mounting the directional pulley 81, with the groove opening 11 adapted to the crossbar in its unfolded state. The mounting ring 32 is welded with mounting lugs 33 adapted to the blind groove 13.

[0039] Blind slots 12 and 13 are respectively provided with through holes for installing the directional fixed pulley 81 (connecting plate) and the mounting ear plate 33. The mounting ear plate 33 is installed on the blind slot 13 of the main rod.

[0040] like Figure 9 The inner wall of the main rod is welded with connecting lugs 14 and 15 for supporting the slide rail bracket 3 and the winding frame 5. For example... Figure 10 , 11 In this embodiment, the winding frame is composed of a pad 51 and a support plate 52. The connecting ear 15, the pad 51, and the support plate 52 are all provided with screw holes. The connecting ear 15, the pad 51, and the support plate 52 are connected by a bolt assembly. The support plate 52 is provided with a through hole 521 for installing the winding wheel (wheel frame).

[0041] When assembling the internal structure of the main pole, first install and fix the winding frame and winding wheel from the lower end of the main pole, then install and fix the slide rail bracket from the upper end of the main pole and arrange the suspension rope routing. After connecting the free end of the suspension rope to the crossbar bracket, assemble the crossbar and the crossbar bracket and insert it into the main pole from the upper end of the main pole.

[0042] In this embodiment, the uprights of the foldable and retractable gantry are manually erected and positioned. The upper structure is then lifted synchronously by rotating a hand-cranked pulley. During the lifting process, the crossbars unfold to both sides under their own weight, enabling a rapid unfolding process that facilitates quick on-site deployment and adjustment. Example 3

[0043] Based on Embodiment 2, in this embodiment, the sleeve 35 extends downward and is welded to the winding frame 5, that is, it is an integral structure with the slide rail bracket 3, only retaining the connecting ear 15 to support the slide rail bracket 3. This further simplifies the installation of the crossing frame and the wiring operation of the suspension rope, and the wiring of the suspension rope can be completed directly outside the main pole and then installed in one step.

[0044] The above description is merely a preferred embodiment of the present invention; however, 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 its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A foldable and retractable strut, characterized in that... The system includes a sleeve-shaped main rod, two crossbars, a slide rail bracket for mounting slide rails, a crossbar support frame, a winding roller with a hanging rope wound around it, a winding frame, and a roller assembly. The slide rail bracket, roller assembly, and winding frame are installed inside the main rod. The winding roller is rotatably supported on the winding frame. The hanging rope is led out from the winding roller and connected to the crossbar support frame via the roller assembly. By rotating the winding roller, the hanging rope is wound and unwound, driving the crossbar support frame to rise and fall under the constraint of the slide rail. The crossbars are hinged to the crossbar support frame. When the crossbar support frame rises to the top of the main rod, the two crossbars change from a folded state that is close to each other to an unfolded state that is straight.

2. The foldable and retractable strut frame according to claim 1, characterized in that... The slide rail bracket consists of a mounting ring and a guide rail. The guide rail is composed of two channel steels arranged back to back with a gap between them. The two ends of the channel steels are respectively installed on the mounting ring to form a modular lattice structure.

3. The foldable and retractable strut frame according to claim 2, characterized in that... The crossbar support frame includes a support plate and pulleys, and the support plate is slidably connected to the guide rail via the pulleys.

4. The foldable and retractable strut frame according to claim 1, characterized in that... Each of the crossbars has a two-link rod hinged to its free end for erecting conductors. The two-link rod consists of an erecting rod and a supporting rod. The erecting rod is hinged to the free end of the crossbar, and one end of the supporting rod is hinged to the erecting rod.

5. The foldable and retractable strut frame according to claim 4, characterized in that... The crossbars, erecting rods, and support rods are all channel steel structures. The erecting rods can be stored inside the crossbars, and the support rods can be stored inside the erecting rods.

6. The foldable and retractable strut frame according to claim 5, characterized in that... The crossbar also includes a top block with a screw hole; the bottom of the crossbar has a pre-drilled slotted hole for threading screws. The top block is set on the crossbar and is detachably connected to the crossbar by threading screws through the screw hole and the slotted hole. The support rod abuts against the top block. When the screw slides to abut against the edge of the slotted hole, the support rod supports the erecting rod.

7. The foldable and retractable strut frame according to claim 3, characterized in that... The roller assembly includes two directional fixed pulleys located at the top of the main rod and a convergence pulley assembly located below the crossbar support frame. The convergence pulley assembly includes two transition fixed pulleys corresponding to the crossbar and two convergence fixed pulleys. The suspension rope wound around the winding wheel passes through the convergence fixed pulley, the transition fixed pulley, and the directional fixed pulley in sequence before being connected to the crossbar support frame.

8. The foldable and retractable strut frame according to claim 2, characterized in that... A pulley is installed on each side of the crossbar support frame, and the crossbar support frame is slidably connected to the slide rail through the pulleys.

9. The foldable and retractable strut frame according to claim 2, characterized in that... The top of the main rod has a slot and a blind groove for positioning and installing the mounting ring. The slot is adapted to the crossbar in the unfolded state.

10. The foldable and retractable strut frame according to claim 9, characterized in that... The mounting ring is welded with a mounting ear plate, which is mounted on the blind groove of the main rod.

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