Portable power busway hoisting device

Abstract

The application discloses a portable electric power pipe hoisting device, which comprises two symmetrical clamping arms, each of the clamping arms comprises a connecting section, a clamping section, a lifting ring and a positioning section, the connecting sections of the two clamping arms are cross-connected at the cross points, and a scissor type clamping structure is formed. According to the application, the scissor type clamping structure is matched with the lever principle, the lifting rope pulls the lifting ring upward during hoisting, the clamping section is tightened inward around the cross point, the clamping force is increased synchronously with the increase of the hoisting load, the positioning section is inserted into a reserved slot of the electric power pipe to form a forward buckling, and the slipping and unhooking are effectively prevented; meanwhile, a warning signal can be sent when the clamping is in place, hoisting is performed after an operator confirms that the positioning is reliable, the ratchet and pawl assembly unidirectionally locks the opening trend of the clamping section, the clamping arms are not loosened even if the lifting rope is loosened accidentally, and the hoisting safety is ensured from the mechanical and warning dimensions.

Description

Technical Field

[0001] This invention relates to the field of power construction hoisting equipment technology, and in particular to a portable power duct hoisting device. Background Technology

[0002] In various municipal engineering construction projects, construction projects often face the dual pressure of tight schedules and heavy workloads. Especially when the construction of power ducts is located on main urban roads, in areas with complex underground pipelines and limited work sites, balancing hoisting safety and construction efficiency becomes the core challenge of on-site management.

[0003] Power ducts are mostly long, prefabricated components. The hoisting operation is located close to the road with dense pedestrian and vehicular traffic. If the hoisting method is improper, the positioning is difficult, or the operation is cumbersome, it is easy to cause safety and quality hazards such as component collision and cracking, hoisting instability, and traffic interference, which will adversely affect the project construction.

[0004] Traditional power duct hoisting is not only complex and inconvenient to operate, but also consumes a lot of manpower and machinery. It is also significantly affected by the small space and cross-operations, resulting in low hoisting and positioning efficiency, which makes it difficult to meet the tight construction schedule requirements. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings mentioned above by providing a portable power duct hoisting device that, while ensuring the duct remains intact and the operation is safe and reliable, enables convenient, rapid, and precise hoisting of prefabricated ducts, shortens the construction cycle, and reduces labor and machinery costs.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a portable power duct hoisting device, comprising: Two symmetrically arranged clamping arms, each clamping arm including a connecting section, a clamping section, a lifting ring, and a positioning section, the connecting sections of the two clamping arms are crossed and rotatably connected at the intersection point to form a scissor-type clamping structure, the clamping section and the lifting ring are respectively set at both ends of the corresponding connecting section, the lifting ring is used to connect the lifting rope, and the distance between the clamping section and the intersection point is greater than the distance between the lifting ring and the intersection point. The positioning section is fixedly set at the end of the clamping section away from the connecting section and extends towards the inner side of the two clamping arms, the positioning section is used to insert into the slots reserved on both sides of the power conduit; The prompting component, located within the positioning section, includes an arrival detection unit and an alarm unit, which is used to trigger the alarm unit to issue an alarm signal after the positioning section is inserted into the slot into place; The ratchet and pawl assembly is located at the intersection of the two connecting sections and is used to unidirectionally restrict the movement of the two clamping sections to the side that is further away from each other.

[0007] Furthermore, a recess is provided at the intersection of the two clamping arms, and the two recesses are interlocked to allow the positioning segments on the two clamping arms to rotate in the same plane.

[0008] Furthermore, the positioning detection unit includes a push rod, a collar, a sealing head, and a compression spring. The push rod is inserted into the positioning section along the axial direction and passes through both ends. The collar is fixedly sleeved on the push rod. Both the push rod and the collar can move along the axial direction of the positioning section. The sealing head is threadedly installed at one of the opposite ends of the two positioning sections, and the sealing head has a through hole for the push rod to pass through. The compression spring is disposed between the collar and the sealing head. The warning unit includes a colored warning layer disposed at the end of the top rod near the compression spring. When the compression spring is in its natural state, the colored warning layer is located inside the sealing head, and the end of the top rod away from the colored warning layer is located outside the positioning section. When the end of the top rod away from the colored warning layer is pushed into the positioning section by the bottom of the slot, the colored warning layer moves to the outside of the sealing head.

[0009] Furthermore, the ratchet and pawl assembly includes a ratchet disc fixedly disposed at the intersection of one of the connecting segments, the ratchet disc having multiple internal ratchet teeth, a turntable rotatably disposed within the ratchet disc, the turntable having multiple pawls circumferentially disposed therewith that are adapted to the internal ratchet teeth, and the ratchet and pawl assembly further includes a locking component for synchronizing the rotation of the turntable with the other connecting segment, and a pushing component for pushing the pawls away from the internal ratchet teeth.

[0010] Furthermore, the locking component includes a hinge shaft disposed at the intersection of the connecting segments and passing through the two connecting segments. The hinge shaft includes a shaft body passing through the connecting segments and an end plate with a diameter larger than the shaft body. The end plate is located inside the ratchet disk. The locking component also includes at least one first synchronization block disposed on the connecting segment away from the ratchet disk. The first synchronization block is inserted into the shaft body, and the shaft body is provided with a sliding groove corresponding to the first synchronization block. A locking sleeve is threaded to the end of the shaft body away from the end plate. A synchronization shaft passing through the hinge shaft is disposed on the turntable, and a second synchronization block inserted into the hinge shaft is disposed on the synchronization shaft.

[0011] Furthermore, the pushing component includes an adjusting sleeve, which is rotatably mounted on a locking sleeve via a torsion spring. The pushing component also includes a guide bead fixedly mounted on the outer wall of the synchronous shaft, located at the end of the synchronous shaft away from the turntable. The adjusting sleeve is provided with a spiral guide groove to guide the movement of the guide bead. When the torsion spring is in its natural state, the pawl is located inside the ratchet disc. When the torsion spring is in its fully compressed state, the pawl is located outside the ratchet disc.

[0012] Furthermore, the ratchet disc is detachably provided with a protective cover extending over the pawl on the side away from the connecting section.

[0013] The beneficial effects of this invention are reflected in: This invention utilizes a scissor-type clamping structure combined with the lever principle. During lifting, the lifting rope pulls upward on the lifting ring, causing the clamping section to tighten inward around the intersection point. The clamping force increases synchronously with the increase of the lifting load. The positioning section inserts into the reserved slot of the power conduit to form a positive engagement, effectively preventing slippage and disengagement. At the same time, the warning component can issue a warning signal when the clamp is in place, ensuring that the operator confirms that the positioning is reliable before lifting. The ratchet and pawl assembly locks the opening tendency of the clamping section in one direction, so that even if the lifting rope accidentally loosens, the clamping arm will not loosen. This invention ensures lifting safety from both mechanical and warning dimensions, solving the problems of cumbersome procedures, low efficiency, and high safety hazards in traditional lifting processes. In addition, the device is foldable and portable, making it suitable for narrow work sites in urban areas, significantly improving construction efficiency and reducing labor and machinery costs. Attached Figure Description

[0014] Figure 1 This is a perspective view of the present invention; Figure 2 This is a structural composition diagram of the component of the present invention; Figure 3 This is a structural view of one of the clamping arms of the present invention; Figure 4 This is a structural view of another clamping arm of the present invention; Figure 5 This is a first partial exploded view of the ratchet and pawl assembly of the present invention; Figure 6 This is a schematic diagram showing the position of the guide bead in this invention; Figure 7 This is a second partial exploded view of the ratchet and pawl assembly of the present invention; Figure 8 This is a schematic diagram illustrating the operation of the present invention.

[0015] In the picture: 1. Clamping arm; 11. Connecting section; 12. Clamping section; 13. Lifting ring; 14. Positioning section; 2. Indicator assembly; 21. Push rod; 22. Collar; 23. Sealing head; 24. Compression spring; 3. Ratchet and pawl assembly; 31. Ratchet disc; 32. Turntable; 33. Pawl; 34. Hinge shaft; 35. First synchronizing block; 36. Locking sleeve; 37. Synchronizing shaft; 38. Second synchronizing block; 39. Adjusting sleeve. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Please see Figure 1-8 This invention discloses a portable power duct hoisting device, comprising: Two symmetrically arranged clamping arms 1, each clamping arm 1 includes a connecting section 11, a clamping section 12, a lifting ring 13, and a positioning section 14. The connecting sections 11 of the two clamping arms 1 are arranged crosswise and rotatably connected at the intersection point to form a scissor-type clamping structure. The clamping section 12 and the lifting ring 13 are respectively set at both ends of the corresponding connecting section 11. The lifting ring 13 is used to connect the lifting rope, and the distance between the clamping section 12 and the intersection point is greater than the distance between the lifting ring 13 and the intersection point. The positioning section 14 is fixedly set at the end of the clamping section 12 away from the connecting section 11 and extends towards the inner side of the two clamping arms 1. The positioning section 14 is used to be inserted into the slots reserved on both sides of the power conduit. The prompt component 2, located within the positioning section 14, includes an arrival detection unit and an alarm unit, which is used to trigger the alarm unit to issue an alarm signal after the positioning section 14 is inserted into the slot into place; The ratchet and pawl assembly 3 is located at the intersection of the two connecting sections 11 and is used to unidirectionally restrict the movement of the two clamping sections 12 to the side away from each other.

[0018] This invention utilizes a scissor-type clamping structure combined with the lever principle. During lifting, the lifting rope pulls the lifting ring 13 upwards, causing the clamping section 12 to tighten inwards around the intersection point. The clamping force increases synchronously with the increase of the lifting load. The positioning section 14 inserts into the reserved slot of the power conduit to form a positive engagement, effectively preventing slippage and disengagement. At the same time, the warning component 2 can issue a warning signal when the clamp is in place, ensuring that the operator confirms that the positioning is reliable before lifting. The ratchet and pawl component 3 locks the opening tendency of the clamping section 12 in one direction, so that even if the lifting rope is accidentally slack, the clamping arm 1 will not be released. This invention ensures lifting safety from both mechanical and warning dimensions, solving the problems of cumbersome, inefficient, and dangerous traditional lifting procedures. In addition, the device is foldable and portable, making it suitable for small work sites in urban areas, greatly improving construction efficiency and reducing labor and machinery costs.

[0019] It should be noted that the end of the positioning section 14 is chamfered to facilitate the operator to insert the positioning section 14 into the slot.

[0020] In one embodiment, a recess is provided at the intersection of the two clamping arms 1, and the two recesses are interlocked to allow the positioning segments 14 on the two clamping arms 1 to rotate in the same plane.

[0021] This design, through the interlocking grooves, allows the surfaces of the two clamping arms 1 to remain flush, thereby ensuring that the two positioning sections 14 are in the same plane, achieving precise alignment and insertion. At the same time, it also allows the two clamping arms to be folded and stored, making the device portable and convenient for workers to move to narrow work areas.

[0022] In one embodiment, the positioning detection unit includes a push rod 21, a collar 22, a sealing head 23, and a compression spring 24. The push rod 21 is inserted into the positioning section 14 along the axial direction and passes through both ends. The collar 22 is fixedly sleeved on the push rod 21. Both the push rod 21 and the collar 22 can move along the axial direction of the positioning section 14. The sealing head 23 is threadedly installed on one of the opposite ends of the two positioning sections 14, and the sealing head 23 is provided with a through hole for the push rod 21 to pass through. The compression spring 24 is disposed between the collar 22 and the sealing head 23. The warning unit includes a colored warning layer disposed at one end of the top rod 21 near the compression spring 24. When the compression spring 24 is in its natural state, the colored warning layer is located inside the sealing head 23, and the end of the top rod 21 away from the colored warning layer is located outside the positioning section 14. When the end of the top rod 21 away from the colored warning layer is pushed into the positioning section 14 by the bottom of the slot, the colored warning layer moves to the outside of the sealing head 23.

[0023] This design ensures that during the insertion of the positioning segment 14 into the power pipe slot, the end of the push rod 21 is pushed in the opposite direction after touching the bottom of the slot, compressing the compression spring and moving axially along the positioning segment 14. This converts the displacement signal of the insertion depth into the linear movement of the push rod 21. When the positioning segment 14 is in place, a high-contrast color warning layer will automatically be exposed, allowing workers to visually see whether the positioning is in place. This avoids problems such as misaligned positioning and improper clamping, significantly improving the efficiency and accuracy of alignment.

[0024] In one embodiment, the ratchet and pawl assembly 3 includes a ratchet disk 31 fixedly disposed at the intersection of one of the connecting segments 11. The ratchet disk 31 is provided with a plurality of internal ratchet teeth. A turntable 32 is rotatably disposed inside the ratchet disk 31. The turntable 32 is circumferentially provided with a plurality of pawls 33 adapted to the internal ratchet teeth. The ratchet and pawl assembly 3 also includes a locking component for making the turntable 32 rotate synchronously with the other connecting segment 11, and a pushing component for pushing the pawls 33 to separate from the internal ratchet teeth.

[0025] This design utilizes the one-way meshing characteristic of the inner ratchet and pawl 33, so that the two clamping arms 1 can only tighten inward and cannot open outward under the lifting load. During the lifting process, the clamping force is continuously locked in the positive direction. After the lifting is completed, the clamping arms 1 can be easily opened and the device can be removed by pushing the pawl 33 to release the meshing. The locking is reliable and the unlocking is convenient.

[0026] In one embodiment, the locking component includes a hinge shaft 34 disposed at the intersection of the connecting segments 11 and passing through the two connecting segments 11. The hinge shaft 34 includes a shaft body passing through the connecting segments 11 and an end plate with a diameter larger than the shaft body. The end plate is located inside the ratchet disk 31. The locking component also includes at least one first synchronization block 35 disposed on the connecting segment 11 away from the ratchet disk 31. The first synchronization block 35 is inserted into the shaft body, and the shaft body is provided with a sliding groove corresponding to the first synchronization block 35. A locking sleeve 36 is threadedly connected to the end of the shaft body away from the end plate. A synchronization shaft 37 passing through the hinge shaft 34 is disposed on the turntable 32, and a second synchronization block 38 inserted into the hinge shaft 34 is disposed on the synchronization shaft 37.

[0027] This design uses the first synchronization block 35 to circumferentially fix the corresponding connecting section 11 and the hinge shaft 34, and the second synchronization block 38 to circumferentially fix the hinge shaft 34 and the turntable 32, forming a rigid transmission chain from the connecting section 11 to the turntable 32. This ensures that the relative rotation of the two clamping arms 1 can be accurately and synchronously transmitted to the pawl 33, ensuring that the locking action and the clamping action are always coordinated. The hinge shaft 34 also serves as a structural rotation shaft, a force transmission hub, and a locking component that restricts the separation of the two clamping arms 1, simplifying the structural hierarchy at the intersection point.

[0028] In one embodiment, the pushing component includes an adjusting sleeve 39, which is rotatably mounted on a locking sleeve 36 via a torsion spring. The pushing component also includes a guide bead fixedly mounted on the outer wall of the synchronous shaft 37. The guide bead is located at the end of the synchronous shaft 37 away from the turntable 32. A spiral guide groove is provided inside the adjusting sleeve 39 to guide the movement of the guide bead. When the torsion spring is in its natural state, the pawl 33 is located inside the ratchet disc 31. When the torsion spring is in its fully compressed state, the pawl 33 is located outside the ratchet disc 31.

[0029] This design, through the cooperation of the spiral guide groove and the guide bead, enables the quick unlocking of the clamping arm 1. The worker only needs to rotate the adjusting sleeve 39 to drive the synchronous shaft 37 to move axially, pushing the pawl 33 to separate from the inner ratchet, thus unlocking. After the adjusting sleeve 39 is released, the torsion spring will automatically reset, allowing the pawl 33 to automatically return to the locked state. The operation is extremely convenient and greatly improves the disassembly efficiency after hoisting.

[0030] In one embodiment, the ratchet disc 31 is detachably provided with a protective cover extending to the pawl 33 on the side away from the connecting section 11.

[0031] This design, with its removable protective cover, can protect the precision structures such as the pawl and internal ratchet, preventing dust, mud, and debris from entering the ratchet and pawl structure at the construction site. This avoids locking failure caused by debris, ensuring the long-term reliability of the ratchet assembly. At the same time, the removable design also facilitates later maintenance and upkeep.

[0032] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0033] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0034] Additionally, "multiple" refers to two or more.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A portable power duct hoisting device, characterized in that, include: Two symmetrically arranged clamping arms (1) are provided. Each clamping arm (1) includes a connecting section (11), a clamping section (12), a lifting ring (13), and a positioning section (14). The connecting sections (11) of the two clamping arms (1) are arranged crosswise and rotated at the intersection point to form a scissor clamping structure. The clamping section (12) and the lifting ring (13) are respectively provided at both ends of the corresponding connecting section (11). The lifting ring (13) is used to connect the lifting rope. The distance between the clamping section (12) and the intersection point is greater than the distance between the lifting ring (13) and the intersection point. The positioning section (14) is fixedly provided at the end of the clamping section (12) away from the connecting section (11) and extends towards the inner side of the two clamping arms (1). The positioning section (14) is used to be inserted into the slots reserved on both sides of the power pipe. The prompting component (2) is set in the positioning section (14) and includes a positioning detection unit and an alarm unit. It is used to trigger the alarm unit to issue an alarm signal after the positioning section (14) is inserted into the slot. The ratchet and pawl assembly (3) is located at the intersection of the two connecting sections (11) and is used to unidirectionally restrict the movement of the two clamping sections (12) to the side away from each other.

2. The portable power duct hoisting device according to claim 1, characterized in that: A recessed groove is provided at the intersection of the two clamping arms (1), and the two recessed grooves are interlocked to allow the positioning section (14) on the two clamping arms (1) to rotate in the same plane.

3. The portable power duct hoisting device according to claim 1, characterized in that: The positioning detection unit includes a top rod (21), a collar (22), a sealing head (23), and a compression spring (24). The top rod (21) is inserted into the positioning section (14) along the axial direction and passes through both ends. The collar (22) is fixedly sleeved on the top rod (21). Both the top rod (21) and the collar (22) can move along the axial direction of the positioning section (14). The sealing head (23) is threaded onto one of the opposite ends of the two positioning sections (14), and the sealing head (23) has a through hole for the top rod (21) to pass through. The compression spring (24) is located between the collar (22) and the sealing head (23). The warning unit includes a colored warning layer disposed on the top rod (21) near the compression spring (24). When the compression spring (24) is in its natural state, the colored warning layer is located inside the sealing head (23), and the end of the top rod (21) away from the colored warning layer is located outside the positioning section (14). When the end of the top rod (21) away from the colored warning layer is pushed into the positioning section (14) by the bottom of the slot, the colored warning layer moves to the outside of the sealing head (23).

4. The portable power duct hoisting device according to claim 1, characterized in that: The ratchet and pawl assembly (3) includes a ratchet disk (31) fixedly disposed at the intersection of one of the connecting segments (11). The ratchet disk (31) is provided with a plurality of internal ratchet teeth. A turntable (32) is rotatably disposed inside the ratchet disk (31). The turntable (32) is provided with a plurality of pawls (33) that are adapted to the internal ratchet teeth in the circumferential direction. The ratchet and pawl assembly (3) also includes a locking component for making the turntable (32) rotate synchronously with the other connecting segment (11), and a pushing component for pushing the pawls (33) to separate from the internal ratchet teeth.

5. The portable power duct hoisting device according to claim 4, characterized in that: The locking component includes a hinge shaft (34) located at the intersection of the connecting segments (11) and passing through the two connecting segments (11). The hinge shaft (34) includes a shaft body passing through the connecting segments (11) and an end plate with a diameter larger than the shaft body. The end plate is located inside the ratchet disk (31). The locking component also includes at least one first synchronization block (35) located on the connecting segment (11) away from the ratchet disk (31). The first synchronization block (35) is inserted into the shaft body, and the shaft body is provided with a sliding groove corresponding to the first synchronization block (35). A locking sleeve (36) is threaded to the end of the shaft body away from the end plate. A synchronization shaft (37) passing through the hinge shaft (34) is provided on the turntable (32), and a second synchronization block (38) inserted into the hinge shaft (34) is provided on the synchronization shaft (37).

6. The portable power duct hoisting device according to claim 5, characterized in that: The pushing component includes an adjusting sleeve (39), which is rotatably mounted on a locking sleeve (36) via a torsion spring. The pushing component also includes a guide bead fixedly mounted on the outer wall of the synchronous shaft (37). The guide bead is located at the end of the synchronous shaft (37) away from the turntable (32). The adjusting sleeve (39) is provided with a spiral guide groove to guide the movement of the guide bead. When the torsion spring is in its natural state, the pawl (33) is located inside the ratchet disc (31). When the torsion spring is in its fully compressed state, the pawl (33) is located outside the ratchet disc (31).

7. The portable power duct hoisting device according to claim 4, characterized in that: The ratchet disc (31) is detachably provided with a protective cover covering the pawl (33) on the side away from the connecting section (11).

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