Rapid hoisting device for bridge prefabricated box culvert construction
By introducing protective sleeves and limiting anti-detachment mechanisms into the hoisting device, the problem of wire rope detachment during the hoisting of precast box culverts for bridges was solved, improving safety and hoisting efficiency.
Patent Information
- Application Number
- CN202422191219.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-07
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2034-09-07
AI Technical Summary
Existing precast box culvert hoisting equipment is prone to tilting and wire rope slippage during hoisting, posing a high safety risk.
A rapid hoisting device for the construction of precast box culverts for bridges was designed. It adopts a protective sleeve and a limiting and anti-detachment mechanism. During the hoisting process, the protective sleeve avoids the hook from being exposed through the cooperation of sliding and limiting blocks, ensuring that the wire rope sleeve is not easy to detach.
This improves the safety of the hoisting process, prevents the wire rope from coming off the hook during hoisting, and ensures that the hoisting speed is not affected.
Smart Images
Figure CN223813275U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to hoisting equipment, concretely refers to a bridge prefabricated box culvert construction fast hoisting device. BACKGROUND
[0002] The bridge prefabricated box culvert is a new type of bridge structure, which is spliced by multiple box-shaped concrete components, and is usually used in small bridges, culverts, tunnels and other projects. In the construction process, the prefabricated box culvert usually needs to be hoisted by a hoisting device. The hoisting device in the prior art comprises a hoisting vehicle, a winch, a hoisting steel wire rope and a hook. One end of the hoisting steel wire rope is fixed to the winch, and the other end is connected to the top of the hook. A support wall is provided on the hoisting vehicle to support the hoisting steel wire rope. The winch winds the hoisting steel wire rope to realize the lifting work. Before lifting, a steel wire rope sleeve is usually bound on both ends or four corners of the bridge prefabricated box culvert, and then the steel wire rope sleeve is hung on the hook for lifting and transportation. Since the bridge prefabricated box culvert is large in size, it is easy to tilt during movement, which may cause the steel wire rope sleeve to unhook, posing a high risk. SUMMARY
[0003] The technical problem to be solved by the utility model is to overcome the above technical problems and provide a bridge prefabricated box culvert construction fast hoisting device.
[0004] To solve the above technical problems, the utility model provides a technical scheme, that is, a bridge prefabricated box culvert construction fast hoisting device, which comprises a hoisting steel wire rope and a hook. A pull rod is arranged on the top of the hook. A through hole is arranged on the top of the pull rod. The hoisting steel wire rope passes through the through hole and is bound to the top end of the pull rod. A protective sleeve is sleeved on the outer side of the pull rod. The protective sleeve is arranged on the pull rod in a sliding manner. A cavity for accommodating the hook is arranged on the bottom of the protective sleeve. When the protective sleeve is at the highest position, the hook is exposed. When the protective sleeve is at the lowest position, the hook is retracted into the cavity.
[0005] Further, a limiting groove is arranged on the outer side wall of the pull rod. A limiting block is arranged on the inner side wall of the top end of the protective sleeve. The limiting block is arranged in the limiting groove in a sliding manner.
[0006] Further, a limiting anti-disengagement mechanism is arranged at the cooperation position of the bottom end of the pull rod and the top end of the protective sleeve.
[0007] Further, the limiting anti-disengagement mechanism comprises a sliding groove, a sliding block and a limiting groove. A plurality of sliding grooves are arranged on the bottom end of the outer side wall of the pull rod in a circumferential direction. The sliding grooves are arranged in an inclined manner, and the outer end is higher. The sliding block is arranged in the sliding groove. The limiting groove is arranged on the top end of the inner side wall of the protective sleeve. When the protective sleeve is at the lowest position, the limiting groove is connected with the sliding groove.
[0008] Further, the limit anti-dropping mechanism comprises an anti-dropping groove, the anti-dropping groove is located at one side of the bottom end of the limit groove, and the end of the anti-dropping groove away from the limit groove is provided with a downward bending area, the limit block enters the bending area through the anti-dropping groove, and the anti-dropping limit is realized.
[0009] Further, the top end of the pull rod side wall is provided with a blocking ring, and the blocking ring and the top end of the protective sleeve are provided with a spring therebetween.
[0010] Compared with the prior art, the utility model has the advantages that the protective sleeve is arranged, after the steel wire rope sleeve used for hoisting on the bridge prefabricated box culvert is hung on the hook, the protective sleeve moves downward to cover the opening of the hook, thereby the inclination in the hoisting process can be avoided, the steel wire rope sleeve is prevented from being unhooked, the safety of the hoisting device is improved, the hoisting mode is simple, and the hoisting speed is not affected. BRIEF DESCRIPTION OF DRAWINGS
[0011] Figure 1 It is a structural schematic view of the utility model embodiment one.
[0012] Figure 2 It is an explosion view of the utility model embodiment one.
[0013] Figure 3 It is a structural schematic view of the utility model embodiment two.
[0014] Figure 4 It is a longitudinal section structural schematic view of the utility model embodiment three.
[0015] Figure 5 It is an explosion view of the utility model embodiment four.
[0016] As shown in the drawings: 1, hoisting steel wire rope; 2, hook; 3, pull rod; 4, protective sleeve; 5, cavity; 6, limit groove; 7, limit block; 8, sliding groove; 9, sliding block; 10, limit recess; 11, anti-dropping groove; 12, bending area; 13, blocking ring; 14, spring; 15, through hole. DETAILED DESCRIPTION
[0017] In order to make the technical problems, technical schemes and beneficial effects to be solved in the utility model more clearly understood, the utility model is further described in detail in the following with reference to the drawings and embodiments.It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.
[0018] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; for those skilled in the art, the specific meaning of the above term in this utility model can be understood according to the specific circumstances.
[0020] Referring to the accompanying drawings, Embodiment 1: A rapid hoisting device for the construction of precast box culverts for bridges includes a hoisting wire rope 1 and a hook 2. The top of the hook 2 is provided with a pull rod 3, and the top of the pull rod 3 is provided with a through hole 15. The hoisting wire rope 1 passes through the through hole 15 and is tied to the top of the pull rod 3. A protective sleeve 4 is sleeved on the outside of the pull rod 3. The protective sleeve 4 is slidably mounted on the pull rod 3. The bottom of the protective sleeve 4 is provided with a cavity 5 for accommodating the hook 2. When the protective sleeve 4 is at its highest position, the hook 2 is exposed, and when it is at its lowest position, the hook 2 is retracted into the cavity 5.
[0021] The outer side wall of the pull rod 3 is provided with a limiting groove 6, and the inner side wall of the top of the protective sleeve 4 is provided with a limiting block 7. The limiting block 7 is slidably disposed in the limiting groove 6. The limiting block 7 cooperates with the limiting groove 6 to prevent the protective sleeve 4 from rotating, thereby causing the cavity 5 to be misaligned with the hook 2.
[0022] In practice, when connecting the precast box culvert of the bridge, the protective sleeve 4 is pulled upward to expose the hook 2. The wire rope used for hoisting on the precast box culvert is then hooked onto the hook 2. After the protective sleeve 4 is released, it moves downward under the action of gravity, causing the hook 2 to retract into the protective sleeve 4. The hook 2 is then covered by the sleeve. If the hook 2 is tilted during the hoisting process, the protective sleeve 4 will always be under the action of gravity, preventing the hook 2 from being easily exposed, thus avoiding the wire rope from falling off the hook 2.
[0023] Example 2: Based on Example 1, the top of the side wall of the pull rod 3 is provided with a retaining ring 13, and a spring 14 is provided between the retaining ring 13 and the top of the protective sleeve 4.
[0024] In practice, when the spring 14 is in a free state, the protective sleeve 4 is at its lowest point. If there is any tilting or collision during the hoisting process, the spring 14 will always give the protective sleeve 4 a push in the direction of the hook 2 to prevent the protective sleeve 4 from shifting.
[0025] Example 3: Based on Example 1, the bottom of the outer wall of the pull rod 3 is provided with a plurality of sliding grooves 8 along the circumferential direction. The sliding grooves 8 are inclined and the outer ends are higher. The sliding grooves 8 are provided with sliders 9 inside. The top of the inner wall of the protective sleeve 4 is provided with a limiting groove 10. When the protective sleeve 4 is at its lowest point, the limiting groove 10 is connected to the sliding groove 8.
[0026] In practice, when a collision occurs during hoisting and causes the tie rod 3 to tilt at an excessive angle (when one end of the tie rod 3 connected to the hoisting wire rope is lower than the end connected to the hook 2), the slider 9 on the lower side quickly slides towards one end of the limiting groove 10, so that both ends are located in the limiting groove 10 and the slide groove 8 respectively, thereby achieving a locking connection and preventing the protective sleeve 4 from leaving the hook 2.
[0027] Example 4: Based on Example 1, the limiting and anti-detachment mechanism includes an anti-detachment groove 11, which is located on one side of the bottom of the limiting groove 6. The end of the anti-detachment groove 11 away from the limiting groove 6 is provided with a downward bending area 12. The limiting block 7 enters the bending area through the anti-detachment groove 11 to achieve anti-detachment limiting.
[0028] The cavity 5 is slightly loose, allowing the hook 2 to rotate horizontally at a certain angle (to allow the limiting block 7 to rotate to the bending area 12).
[0029] In practice, during the hoisting and hooking process, when the limiting block 7 slides to the bottom of the limiting groove 6, the protective sleeve 4 is rotated so that the limiting block 7 passes through the anti-detachment groove 11 and enters the bending area. If a collision occurs during the hoisting process and causes the tie rod 3 to tilt at an excessive angle, the limiting block 7 is limited by the anti-detachment groove 11 and cannot enter the limiting groove 6, thereby preventing the protective sleeve 4 from leaving the hook 2.
[0030] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.
Claims
1. A rapid hoisting device for the construction of precast box culverts for bridges, comprising a hoisting wire rope (1) and a hook (2), characterized in that: The hook (2) is provided with a pull rod (3) at the top, and the pull rod (3) is provided with a through hole (15) at the top. The lifting wire rope (1) passes through the through hole (15) and is tied to the top of the pull rod (3). A protective sleeve (4) is sleeved on the outside of the pull rod (3). The protective sleeve (4) is slidably mounted on the pull rod (3). The bottom of the protective sleeve (4) is provided with a cavity (5) for accommodating the hook (2). When the protective sleeve (4) is at its highest position, the hook (2) is exposed. When it is at its lowest position, the hook (2) is retracted into the cavity (5).
2. The rapid hoisting device for precast box culvert construction according to claim 1, characterized in that: The pull rod (3) has a limiting groove (6) on its outer side wall, and the protective sleeve (4) has a limiting block (7) on its inner side wall at the top. The limiting block (7) is slidably disposed in the limiting groove (6).
3. The rapid hoisting device for precast box culvert construction according to claim 2, characterized in that: The bottom end of the pull rod (3) is fitted with a limiting and anti-detachment mechanism that cooperates with the top end of the protective sleeve (4).
4. The rapid hoisting device for precast box culvert construction according to claim 3, characterized in that: The limiting and anti-detachment mechanism includes a sliding groove (8), a slider (9) and a limiting groove (10). The bottom of the outer wall of the pull rod (3) is provided with multiple sliding grooves (8) along the circumferential direction. The sliding grooves (8) are inclined and the outer ends are higher. The slider (9) is provided inside the sliding grooves (8). The top of the inner wall of the protective sleeve (4) is provided with a limiting groove (10). When the protective sleeve (4) is at its lowest point, the limiting groove (10) is connected to the sliding groove (8).
5. A rapid hoisting device for precast box culvert construction according to claim 3, characterized in that: The limiting and anti-detachment mechanism includes an anti-detachment groove (11), which is located on one side of the bottom end of the limiting groove (6). The end of the anti-detachment groove (11) away from the limiting groove (6) is provided with a downward bending area (12). The limiting block (7) passes through the anti-detachment groove (11) and enters the bending area to achieve anti-detachment limiting.
6. A rapid hoisting device for precast box culvert construction according to claim 2, characterized in that: The top of the side wall of the pull rod (3) is provided with a retaining ring (13), and a spring (14) is provided between the retaining ring (13) and the top of the protective sleeve (4).