Weight lifting arm fixing and mounting combination device
Through the combined fixing method of rigid cylindrical base and threaded steel bars, the problems of slurry leakage and floating of the weightlifting arm are solved, the construction quality and safety of the shield pipe sheet are ensured, and the stable fixing and sealing effect is achieved.
Patent Information
- Application Number
- CN202422282722.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-19
AI Technical Summary
In the prior art, the fixing method of the weightlifting arm has insufficient positioning of the rubber tube base and unstable fixation of the U-shaped threaded steel bars, resulting in slurry leakage and up-floating offset problems, affecting the quality and safety of the shield tube sheet.
The combination of rigid cylindrical base and rubber sleeve is adopted, combining threaded straight bar steel bar and U-shaped threaded steel bar fixing method, and the sealing and stability of the weightlifting arm and steel mold are enhanced through welding and plastic sleeve insulation.
Effectively prevent slurry leakage and floating phenomena, improve the construction quality and safety of shield pipe sheets, reduce material waste and construction costs, and improve construction efficiency and safety.
Smart Images
Figure CN223119926U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of shield tunneling technology for subways, and particularly relates to a combined device for fixedly installing a lifting arm. Background Technique
[0002] Segment linings, as the core components in shield tunneling construction of subways, form the first strong defense line inside the tunnel. They not only resist the huge pressure from the soil layer and the threat of groundwater seepage, but also bear the challenges in various special environments. Among them, the lifting arm, as a pre-embedded element with precise design, is skillfully embedded in the segment concrete. It is not only responsible for the precise hoisting operation of the segments, but also plays a key role in the subsequent secondary grouting process. The quality of the lifting arm is directly related to the safety and overall quality of tunnel construction.
[0003] However, in the current manufacturing process, although the fixing method combining a rubber tube base and U-shaped threaded steel bars is adopted, a series of challenges and deficiencies still exist. Specifically, the positioning and restraint ability of the rubber tube base on the steel mold is limited, making it difficult to form a tight fit between the bottom of the lifting arm and the mold. As a result, during the vibration operation, the concrete slurry is likely to surge up along the thread gaps of the lifting arm, resulting in slurry leakage, which affects the structural strength and sealing performance.
[0004] In addition, although the design intention of the U-shaped threaded steel bar is good, aiming to stabilize the lifting arm by pressing down the top of the grouting pipe, in actual operation, due to its relatively high setting position, its downward pressure is insufficient and it is difficult to effectively contain the upward floating and offset trends of the lifting arm during the pouring process. This deficiency not only weakens the stability of the fixation, but also exacerbates the risk of concrete slurry penetration, further intensifying the problem of thread slurry leakage, posing a potential threat to the long-term stability and safety of the tunnel structure.
[0005] To sum up, there is still room for optimization in the fixation and protection of the lifting arm in the existing process. The main problems lie in the insufficient restraint efficiency of the rubber tube base and the limitations of the U-shaped steel bar fixation method. Therefore, exploring a more efficient and reliable fixation technology to improve the quality control level in the manufacturing process of segment linings has become a key problem to be solved urgently. Summary of the Invention
[0006] The purpose of the utility model is to provide a combined device for fixedly installing a lifting arm to solve the problems raised in the above background technique.
[0007] To achieve the above purpose, the utility model provides the following technical solution: A combined device for fixedly installing a lifting arm includes a lifting arm body and a fixed installation frame. A rigid cylindrical base is provided at the bottom of the lifting arm body, a grouting pipe is provided at the upper part of the lifting arm body, a small disc is provided on the grouting pipe, and a lifting arm disc is provided on the outer periphery of the middle part of the lifting arm body;
[0008] The fixed mounting bracket includes multiple auxiliary legs and fixed main bars. Two threaded steel bars are symmetrically arranged on the weightlifting arm disc. Auxiliary legs are fixedly connected to both ends of the threaded steel bars. Fixed main bars are fixedly connected to both the upper and lower ends of the auxiliary legs on the same side.
[0009] Preferably, internal threads are provided on the inner wall of the grouting pipe, and external threads are provided on the outer wall. The external threads are located above the external threads.
[0010] Preferably, a rubber sleeve for buffering and isolation is installed between the rigid cylindrical base and the weightlifting arm body.
[0011] Preferably, the small disc is fixedly welded to the fixed main bar located above through a "U"-shaped threaded steel bar.
[0012] Preferably, the "U"-shaped threaded steel bar is a 6 mm threaded steel bar.
[0013] Preferably, the threaded steel bar is a 10 mm threaded straight bar with a length of 30 mm.
[0014] Preferably, a plastic sleeve is sleeved at the part where the threaded steel bar is connected to the weightlifting arm disc.
[0015] The technical effects and advantages of the present utility model:
[0016] 1. Through the combination of the rigid cylindrical base and the rubber sleeve between the weightlifting arm and the steel mold base, a more tight contact is achieved. This design effectively prevents the infiltration of concrete slurry water, avoiding problems such as a decrease in structural strength or corrosion caused by slurry water penetration.
[0017] 2. Use threaded straight bars (the length should be 300 mm to meet the actual use requirements) to press down and fixedly weld the weightlifting arm disc, and conduct insulation treatment through plastic sleeves. This design significantly enhances the stability of the weightlifting arm during concrete pouring and vibration, effectively avoiding the floating phenomenon of the weightlifting arm due to buoyancy, and ensuring the construction quality and safety. 3. The grouting pipe at the top of the weightlifting arm is fixedly locked by welding with a "U"-shaped threaded steel bar. This design effectively prevents the left and right offset of the weightlifting arm during concrete pouring and vibration, which not only ensures the accuracy of the grouting operation but also improves the stability and reliability of the overall structure.
[0018] 4. The fixed installation design of the weightlifting arm fully considers the sealing and stability, effectively eliminating the problem of slurry leakage from the threads of the weightlifting arm. This not only improves the construction efficiency but also reduces the material waste and subsequent repair work caused by slurry leakage.
[0019] 5. Since the cleaning operation process of the leakage of the lifting arm thread after the segment is demolded is omitted, the cost expenditure of the repair personnel is reduced. At the same time, due to the rationality and stability of the structural design, the rework and maintenance costs caused by construction problems are also reduced.
[0020] 6. The stable fixing device and reasonable structural design enable the lifting arm to maintain a stable posture during construction, reducing the time required for adjusting the position or repairing problems. This helps to improve construction efficiency and shorten the construction period; the design of the entire fixing device fully considers safety and reliability, and ensures the stability of the lifting arm during construction through multiple fixing and welding measures, reducing the risk of safety accidents caused by equipment failures or improper operations. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 is a schematic structural diagram of the present utility model;
[0022] Figure 2 is a schematic structural diagram of the lifting arm body.
[0023] In the figure: 1 lifting arm body, 2 rigid cylindrical base, 3 rubber sleeve, 4 grouting pipe, 5 internal thread, 6 external thread, 7 small disc, 8 lifting arm disc, 9 auxiliary leg, 10 fixed main reinforcement, 11 threaded reinforcement, 12 "U"-shaped threaded reinforcement, 13 plastic sleeve. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0025] As Figure 1 - Figure 2 shows a specific implementation manner of a lifting arm fixed installation combination device of the present utility model: including a lifting arm body 1 and a fixed installation frame. A rigid cylindrical base 2 is provided at the bottom of the lifting arm body 1, a grouting pipe 4 is provided at the upper part of the lifting arm body 1, a small disc 7 is provided on the grouting pipe 4, and a lifting arm disc 8 is provided on the outer periphery of the middle part of the lifting arm body 1;
[0026] The fixed installation frame includes a plurality of auxiliary legs 9 and fixed main reinforcements 10. Two threaded reinforcements 11 are symmetrically provided on the lifting arm disc 8. Auxiliary legs 9 are fixedly connected to both ends of the threaded reinforcements 11. Fixed main reinforcements 10 are fixedly connected to both the upper and lower ends of the auxiliary legs 9 on the same side;
[0027] In addition, an internal thread 5 is provided on the inner wall of the grouting pipe 4, and an external thread 6 is provided on the outer wall. Above the external thread 6 is located the external thread 6.
[0028] Furthermore, a rubber sleeve 3 for buffering and isolation is installed between the rigid cylindrical base 2 and the weightlifting arm body 1.
[0029] Moreover, the small disc 7 is fixedly welded to the fixed main reinforcement 10 located above through a "U"-shaped threaded steel bar 12. The "U"-shaped threaded steel bar 12 is a threaded steel bar with a diameter of 6 mm. A plastic sleeve is sleeved at the part where the threaded steel bar is connected to the weightlifting arm disc. The threaded steel bar 11 is a 10-mm threaded straight bar with a length of 30 mm.
[0030] Working principle and process:
[0031] The rigid cylindrical base, rubber sleeve and weightlifting arm are initially installed and fixed, and then a carbon dioxide gas shielded welding wire is used to weld and constrain the weightlifting arm by welding the threaded straight bar, "U"-shaped threaded steel bar and steel reinforcement cage.
[0032] Install the rigid cylindrical base on the steel mold between the weightlifting arm, and set a rubber sleeve between the base and the weightlifting arm for buffering and isolation. At the same time, use 2 pieces of 10-mm threaded straight bars (length 300 mm) to press and fix and weld the weightlifting arm disc. An insulating treatment is carried out between the threaded straight bar and the weightlifting arm disc using a plastic sleeve. The grouting pipe at the top of the weightlifting arm is welded and fixed and locked using 1 piece of 6-mm "U"-shaped threaded steel bar to prevent the weightlifting arm from deflecting left and right.
[0033] The applicant further declares that the present utility model uses the above embodiments to illustrate the implementation method and device structure of the present utility model, but the present utility model is not limited to the above embodiments, that is, it does not mean that the present utility model must rely on the above methods and structures to be implemented. Those skilled in the art should understand that any improvement to the present utility model, equivalent replacement of the implementation methods selected by the present utility model, addition of steps, selection of specific methods, etc. all fall within the protection scope and the disclosed scope of the present utility model.
[0034] The present utility model is not limited to the above embodiments. All ways that adopt a structure and method similar to that of the present utility model to achieve the purpose of the present utility model are within the protection scope of the present utility model.
Claims
1. A fixed installation combination device for a weightlifting arm, characterized in that: It includes a weightlifting arm body (1) and a fixed mounting bracket. At the bottom of the weightlifting arm body (1), there is a rigid cylindrical base (2). At the upper part of the weightlifting arm body (1), there is a grouting pipe (4). A small disc (7) is provided on the grouting pipe (4). A weightlifting arm disc (8) is provided on the outer periphery of the middle part of the weightlifting arm body (1). The fixed mounting bracket includes multiple auxiliary legs (9) and fixed main bars (10). Two threaded steel bars (11) are symmetrically provided on the weightlifting arm disc (8). Auxiliary legs (9) are fixedly connected to both ends of the threaded steel bar (11). Fixed main bars (10) are fixedly connected to both the upper and lower ends of the auxiliary legs (9) on the same side.
2. The fixed installation combination device of a weightlifting arm according to claim 1, characterized in that: Internal threads (5) are provided on the inner wall of the grouting pipe (4), and external threads (6) are provided on the outer wall. The external threads (6) are located above the external threads (6).
3. The fixed installation combination device of a weightlifting arm according to claim 1, characterized in that: A rubber sleeve (3) for buffering and isolation is installed between the rigid cylindrical base (2) and the weightlifting arm body (1).
4. A weightlifting arm fixed installation combination device according to claim 1, characterized in that: The small disc (7) is fixedly welded to the fixed main bar (10) located above through a "U"-shaped threaded steel bar (12).
5. The fixed installation combination device of a weightlifting arm according to claim 4, characterized in that: The "U"-shaped threaded steel bar (12) is a 6-mm threaded steel bar.
6. The fixed installation combination device of a weightlifting arm according to claim 1, characterized in that: The threaded steel bar (11) is a 10-mm threaded straight bar with a length of 30 mm.
7. The fixed installation combination device of a weightlifting arm according to claim 6, characterized in that: A plastic sleeve (13) is sleeved at the part where the threaded steel bar (11) is connected to the weightlifting arm disc (8).