Simple gantry for low-clearance pile foundation construction
By designing waterproof and extension components on a simple gantry frame, the problems of rusting at the threaded ends and non-adjustable height were solved, thereby improving stability and convenience in low-headroom environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA RAILWAY LIUYUAN GRP CO LTD
- Filing Date
- 2025-08-06
- Publication Date
- 2026-07-14
AI Technical Summary
The simple gantry cranes used for low-headroom pile foundation construction are prone to rusting at the threaded joints under long-term water immersion conditions, and the height cannot be adjusted, affecting structural stability and operational efficiency.
The design incorporates waterproof and extension components, including a waterproof shell, rotating column, extension rod, and motor-driven adjustment system to prevent water from contacting the screws and screw holes. The gantry height is also adjustable via motor to adapt to different terrains.
It effectively prevents screws and screw holes from rusting, improves structural stability and ease of operation, and enhances construction adaptability in low-headroom environments.
Smart Images
Figure CN224493500U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of simple gantry frame technology, and in particular to a simple gantry frame for low-headroom pile foundation construction. Background Technology
[0002] In a simplified gantry crane system, the rust resistance of the gantry crane base has a significant impact on the durability and long-term stability of the entire structure. To achieve efficient and durable rust protection for the gantry crane base, specialized rust prevention technologies are typically required. These technologies usually include auxiliary functional modules such as anti-corrosion coatings, cathodic protection, and the selection of corrosion-resistant materials. Especially under long-term immersion conditions, accompanied by electrochemical corrosion and biofouling, the rust resistance and ease of maintenance of the base directly affect its service life and operational safety. Therefore, developing a long-lasting, reliable, and easy-to-maintain rust-resistant base device has become an important direction for technological improvement.
[0003] In existing technologies, the base structure used for simple underwater gantry cranes generally includes a counterweight module, a connecting mechanism, and rust-proofing components. Structurally, the base has screw connections for fixing the gantry crane columns, using bolts or welding to complete the structural connection; it is also equipped with a rust-proof coating or sealing strips to prevent water vapor penetration and corrosion of metal components. However, in actual use, screws and screw holes often rust due to prolonged immersion in water, and the rust-proofing components and sealing devices are mostly fixed structures, making replacement and maintenance inconvenient, disassembly difficult, and affecting the overall structural stability.
[0004] However, existing simple gantry cranes for low-clearance pile foundation construction still have certain problems in practical applications. On the one hand, the threaded joints are prone to water ingress, and traditional structures lack waterproofing features, making them susceptible to rust and instability from prolonged water immersion. On the other hand, the height cannot be adjusted. These problems reduce the operational efficiency and system stability of simple gantry cranes for low-clearance pile foundation construction, necessitating optimization in structural design. Therefore, a simple gantry crane for low-clearance pile foundation construction is proposed to address these issues. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a simple gantry frame for low-headroom pile foundation construction, aiming to improve the problem of rust and stripping of screws and screw holes at the connection points caused by long-term water immersion in the gantry frame in the prior art.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: a simple gantry frame for low-headroom pile foundation construction, comprising a base, characterized in that: a bracket is fixedly connected to the top of the base, an outer shell is fixedly connected to the top of the base, a waterproof component is provided on the outer wall of the outer shell, and an extension component is provided inside the bracket;
[0007] The waterproof component includes a waterproof shell and a rotating column. The outer wall of the rotating column is fixedly connected to the outer wall of the shell. The outer wall of the waterproof shell is rotatably connected to the outer wall of the rotating column. A waterproof block is fixedly connected to the bottom end of the waterproof shell. A second fixing column is fixedly connected to the outer wall of the waterproof shell. A first fixing column is fixedly connected to the outer wall of the base.
[0008] As a further description of the above technical solution:
[0009] The extension assembly includes an extension rod, the outer wall of which is slidably connected to the inside of the bracket, and a sliding plate is slidably connected to the outer wall of the bracket.
[0010] As a further description of the above technical solution:
[0011] A push block is fixedly connected to the outer wall of the bracket, and a sliding groove is provided on the outer wall of the bracket, and the outer wall of the sliding plate slides inside the sliding groove.
[0012] As a further description of the above technical solution:
[0013] A protective shell is fixedly connected to the outer wall of the bracket, and a pad is fixedly connected inside the protective shell.
[0014] As a further description of the above technical solution:
[0015] A motor is fixedly connected to the top of the pad, and an adjustment plate is fixedly connected to the output end of the motor.
[0016] As a further description of the above technical solution:
[0017] An adjusting column is rotatably connected inside the adjusting plate two, and an adjusting plate one is rotatably connected to the outer wall of the adjusting column. A rotating column is rotatably connected inside the adjusting plate one, and one section of the rotating column is fixedly connected to the outer wall of the pushing block.
[0018] As a further description of the above technical solution:
[0019] The extension rod is slidably connected to a locking block inside, and the extension rod has an inner groove. The outer wall of the locking block slides inside the bracket, and the locking block slides inside the sliding plate.
[0020] As a further description of the above technical solution:
[0021] One end of the locking block is fixedly connected to a support column, and a spring is sleeved on the outer wall of the support column. One end of the spring is fixedly connected to one end of the locking block, and the other end of the spring is fixedly connected to the inside of the extension rod.
[0022] This utility model has the following beneficial effects:
[0023] 1. In this utility model, after the gantry frame is assembled, the waterproof shell is rotated to drive the waterproof block into the groove of the base. Then, the fixing column one and fixing column two are fixed together with wire, thereby fixing the waterproof block and the waterproof shell to the base in a stable and compact manner. This achieves the effect of preventing water from contacting the screws and screw threads, solving the problem of rust and stripping of screws and screw threads at the connection point caused by long-term immersion in water in the gantry frame, and improving the accuracy of the excitation and demagnetization tool.
[0024] 2. In this utility model, the sliding plate is first pulled upwards. The locking block has an inclined structure. When the sliding plate slides over the surface of the locking block, it compresses the locking block inwards. Then the motor is started. The motor drives the second adjusting plate and the first adjusting plate to rotate. Under the adjustment action of the adjusting column and the rotating column, the rotational motion of the motor is converted into the linear motion of the extension rod, which achieves the effect of adjusting the height of the gantry frame. This solves the problem of not being able to adjust the height of the gantry frame under different terrains and improves the convenience of the excitation and demagnetization tool. Attached Figure Description
[0025] Figure 1 This is a three-dimensional schematic diagram of a simple gantry frame for low-headroom pile foundation construction proposed in this utility model;
[0026] Figure 2 This is a schematic diagram of the outer shell of a simple gantry frame for low-headroom pile foundation construction proposed in this utility model;
[0027] Figure 3 This is a schematic diagram of the rotating column of a simple gantry frame for low-headroom pile foundation construction proposed in this utility model.
[0028] Figure 4 This is a schematic diagram of the extension rod of a simple gantry frame for low-headroom pile foundation construction proposed in this utility model;
[0029] Figure 5 This is a schematic diagram of the structure of a pad plate for a simple gantry frame used in low-headroom pile foundation construction proposed in this utility model.
[0030] Figure 6 This is a schematic diagram of the structure of the clamping block of a simple gantry frame for low-headroom pile foundation construction proposed in this utility model.
[0031] Legend:
[0032] 1. Base; 2. Outer shell; 3. Waterproof shell; 4. Fixed column one; 5. Fixed column two; 6. Rotating column; 7. Waterproof block; 8. Extension rod; 9. Bracket; 10. Push block; 11. Rotating column; 12. Adjusting plate one; 13. Adjusting column; 14. Adjusting plate two; 15. Protective shell; 16. Sliding plate; 17. Sliding groove; 18. Locking block; 19. Motor; 20. Pad; 21. Inner groove; 22. Support column; 23. Spring. Detailed Implementation
[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0034] Reference Figures 1-3 A simple gantry crane for low-headroom pile foundation construction includes a base 1, which serves as the supporting foundation for the entire gantry crane, providing stability and distributing the load pressure during construction, ensuring the stability of the equipment in a low-headroom environment. A bracket 9 is fixedly connected to the top of the base 1, vertically fixed to the top of the base 1, forming the main support structure of the gantry crane, used to install extension components and bear the vertical load during lifting or construction. An outer shell 2 is fixedly connected to the top of the base 1, and the outer wall of the outer shell 2 is provided with a waterproof component to prevent rainwater or mud from seeping in and to protect the internal mechanical structure. An extension component is provided inside the bracket 9 to adjust the height of the gantry crane to adapt to the pile foundation construction needs under low-headroom conditions.
[0035] The waterproof assembly includes a waterproof shell 3 and a rotating column 6. The outer wall of the rotating column 6 is fixedly connected to the outer wall of the outer shell 2, serving as the rotation axis of the waterproof shell 3. This allows the waterproof shell 3 to adjust its angle according to construction needs, enhancing its adaptability. The outer wall of the waterproof shell 3 is rotatably connected to the outer wall of the rotating column 6, and the angle can be adjusted through the rotating column 6. This covers the key connection parts of the outer shell 2, preventing rainwater or mud from seeping in and protecting the internal mechanical structure. A waterproof block 7 is fixedly connected to the bottom of the waterproof shell 3, forming a sealed barrier when in contact with the base 1, preventing moisture or debris from entering from the bottom. A second fixing column 5 is fixedly connected to the outer wall of the waterproof shell 3, and a first fixing column 4 is fixedly connected to the outer wall of the base 1. The first fixing column 4 and the second fixing column 5 are on the same vertical plane and are stably fixed together by wire binding, thereby further fixing the waterproof shell 3 to the top of the base 1.
[0036] Reference Figures 4-6The extension assembly includes an extension rod 8, which, as the core telescopic component, is slidably connected inside the bracket 9. Its telescopic movement adjusts the height or span of the gantry frame to adapt to low-clearance construction requirements. The outer wall of the extension rod 8 is slidably connected inside the bracket 9. A sliding plate 16 is slidably connected to the outer wall of the bracket 9, and the outer wall is slidably connected to a sliding groove 17 within the bracket 9. Sliding the plate pushes the locking block 18 inward, thereby releasing the fixation of the extension rod 8. A pushing block 10 is fixedly connected to the outer wall of the bracket 9 and is connected to an adjusting plate 12 via a rotating column 11, transmitting power to drive the extension rod 8 to telescopically extend or retract. The outer wall of the bracket 9 has a sliding groove 17. The sliding plate 16 has its range of motion limited on the outer wall of the bracket 9. The outer wall of the sliding plate 16 slides within the sliding groove 17. A protective shell 15 is fixedly connected to the outer wall of the bracket 9, covering the motor 19 and transmission components to prevent water and gravel from damaging the motor 19 during construction. A pad 20 is fixedly connected inside the protective shell 15, providing a flat mounting surface for the motor 19 and reducing vibration during operation. The top of the pad 20 is fixedly connected to the motor 19, serving as a power source to drive the adjustment plate 14 to rotate via its output end. The adjustment plate 14 is fixedly connected to the output end of the motor 19, controlling the rotation... The motion is transmitted to the adjusting column 13, which pushes the adjusting plate 12 to swing. The adjusting column 13 is rotatably connected inside the adjusting plate 14, which rotatably connects the adjusting plate 14 and the adjusting plate 12, converting the rotational force into the tilting motion of the adjusting plate 12. The adjusting plate 12 is rotatably connected to the outer wall of the adjusting column 13, transmitting the motion downwards. The rotating column 11 is rotatably connected inside the adjusting plate 12, converting the tilting motion of the adjusting plate 12 into the linear motion of the pushing block 10. One end of the rotating column 11 is fixedly connected to the outer wall of the pushing block 10. A locking block 18 with an inclined structure is slidably connected inside the extension rod 8. The outer wall of the locking block 18 slides inside the extension rod 8 and the bracket 9. When the sliding plate 16 slides past, it can be pushed inward. When the sliding plate 16 returns to its original position, the spring 23 will push out the locking block 18, fixing the extension rod 8 and the bracket 9. The extension rod 8 has an inner groove 21. The outer wall of the locking block 18 slides inside the bracket 9. The locking block 18 slides inside the sliding plate 16. One end of the locking block 18 is fixedly connected to the support column 22, which strengthens the structural strength of the locking block 18 and serves as the support shaft for the spring 23, preventing the spring 23 from being misaligned during compression and rebound. The outer wall of the support column 22 is fitted with the spring 23. One end of the spring 23 is fixedly connected to one end of the locking block 18, and the other end of the spring 23 is fixedly connected to the inside of the extension rod 8.
[0037] Working principle: When using this simple gantry crane for low-headroom pile foundation construction, after the gantry crane is installed, pull the second fixed column 5 to rotate the waterproof shell 3, and move the waterproof shell 3 to the top of the base 1. The bottom of the waterproof shell 3 is equipped with a waterproof block 7. When the waterproof shell 3 rotates to the top of the base 1, the waterproof block 7 can enter the groove set in the base 1. Then, use wire to fix the first fixed column 4 and the second fixed column 5 together, which achieves the effect of preventing water from contacting the screws and screw threads.
[0038] First, pull the sliding plate 16 upward. The locking block 18 has an inclined structure. When the sliding plate 16 slides over the surface of the locking block 18, it pushes the locking block 18 in, thereby releasing the fixation of the extension rod 8. Then, start the motor 19. The motor 19 drives the second adjusting plate 14 to rotate. The second adjusting plate 14 drives the adjusting column 13 to rotate. The adjusting column 13 drives the first adjusting plate 12 to rotate. The first adjusting plate 12 drives the pushing block 10. Under the action of the adjusting column 13 and the rotating column 11, the angle is adjusted, converting the rotational motion of the motor 19 into the linear motion of the pushing block 10, thereby pushing the extension rod 8 upward. After reaching the designated position, the sliding plate 16 is reset. Under the rebound action of the spring 23, the locking block 18 is pushed out, fixing the extension rod 8 and the bracket 9, thus achieving the effect of adjusting the height of the gantry.
[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A simple gantry frame for low-headroom pile foundation construction, comprising a base (1), characterized in that: The base (1) is fixedly connected to a bracket (9) at its top end, and the base (1) is fixedly connected to a shell (2) at its top end. The outer wall of the shell (2) is provided with a waterproof component, and the bracket (9) is provided with an extension component inside. The waterproof component includes a waterproof shell (3) and a rotating column (6). The outer wall of the rotating column (6) is fixedly connected to the outer wall of the outer shell (2). The outer wall of the waterproof shell (3) is rotatably connected to the outer wall of the rotating column (6). A waterproof block (7) is fixedly connected to the bottom end of the waterproof shell (3). A second fixing column (5) is fixedly connected to the outer wall of the waterproof shell (3). A first fixing column (4) is fixedly connected to the outer wall of the base (1).
2. A simplified gantry crane for low-headroom pile foundation construction according to claim 1, characterized in that: The extension assembly includes an extension rod (8), the outer wall of which is slidably connected to the inside of a bracket (9), and a sliding plate (16) is slidably connected to the outer wall of the bracket (9).
3. A simplified gantry crane for low-headroom pile foundation construction according to claim 2, characterized in that: A push block (10) is fixedly connected to the outer wall of the bracket (9), and a sliding groove (17) is provided on the outer wall of the bracket (9). The outer wall of the sliding plate (16) slides inside the sliding groove (17).
4. A simplified gantry crane for low-headroom pile foundation construction according to claim 3, characterized in that: The outer wall of the bracket (9) is fixedly connected to a protective shell (15), and a pad (20) is fixedly connected inside the protective shell (15).
5. A simplified gantry crane for low-headroom pile foundation construction according to claim 4, characterized in that: A motor (19) is fixedly connected to the top of the pad (20), and an adjustment plate (14) is fixedly connected to the output end of the motor (19).
6. A simplified gantry crane for low-headroom pile foundation construction according to claim 5, characterized in that: An adjusting column (13) is rotatably connected inside the adjusting plate two (14), and an adjusting plate one (12) is rotatably connected to the outer wall of the adjusting column (13). A rotating column (11) is rotatably connected inside the adjusting plate one (12), and one end of the rotating column (11) is fixedly connected to the outer wall of the pushing block (10).
7. A simplified gantry crane for low-headroom pile foundation construction according to claim 2, characterized in that: The extension rod (8) has a sliding connection to a locking block (18), and the extension rod (8) has an inner groove (21). The outer wall of the locking block (18) slides inside the bracket (9), and the locking block (18) slides inside the sliding plate (16).
8. A simplified gantry crane for low-headroom pile foundation construction according to claim 7, characterized in that: One end of the locking block (18) is fixedly connected to a support column (22), and a spring (23) is sleeved on the outer wall of the support column (22). One end of the spring (23) is fixedly connected to one end of the locking block (18), and the other end of the spring (23) is fixedly connected to the inside of the extension rod (8).