Temporary fixing clamp for underwater maintenance of marine propeller

Abstract

The utility model discloses a temporary fixing clamp for underwater maintenance of a marine propeller, which comprises a double-handle grip, a Z-axis hollow pipe fixedly welded on the outer wall of one side of the double-handle grip, a vertical pipe slidably mounted in the Z-axis hollow pipe, and an expansion type holding device I mounted at the lower end of the Z-axis hollow pipe and used for limiting the position of the vertical pipe, a second expansion type holding device is installed at the lower end of the vertical pipe, a transverse pipe is installed in the second expansion type holding device, and a multi-claw type clamp is installed at one end of the transverse pipe. As a worker stands at the tail end of the deck, holds the double-handle grip and controls the sinking and position adjustment of the transverse pipe at the lower end of the vertical pipe and the multi-claw fixture, the uncertainty caused by a complex environment in which a diver faces during underwater operation is reduced, the worker can perform fine adjustment by using the double-handle grip in a safe ship environment, and the working efficiency is improved. It is ensured that the multi-claw type clamp can be accurately close to the fixed position of the propeller, and a solid foundation is laid for follow-up maintenance work.

Description

Technical Field

[0001] This utility model relates to the field of marine maintenance auxiliary tools, specifically a temporary fixing clamp for underwater maintenance of marine propellers. Background Technology

[0002] During underwater propeller repairs on small vessels, ensuring both safety and efficiency is paramount. This is typically a collaborative effort between two workers: one maintains the propeller's stationary position while the other performs disassembly, cleaning, and parts replacement. To achieve propeller stationaryness, common methods include installing specialized locking devices or clamps on the propeller shaft, utilizing water flow control or mechanical fixation to secure the propeller in a predetermined position, preventing rotation or movement. In practice, workers must prepare diving equipment and tools beforehand, assess the safety of the aquatic environment, and develop a detailed work plan. The specific process includes: the anchor operator securely holding the propeller in place using anchoring devices or clamps to ensure its stationary position during repairs, while simultaneously connecting it to the hull with safety ropes for added security. The operator then disassembles the propeller blades or related components for inspection, cleaning, and repair, carefully controlling the force and sequence of operations to avoid damaging parts. After maintenance is completed, the staff should reconfirm the propeller's fixed position and conduct necessary tests to ensure its normal operation. However, at present, when maintaining underwater propellers, two staff members need to go into the water and operate in the vicinity of the propeller blades. Since two people are in the same working area underwater at the same time, it is easy to cause space congestion, which increases the complexity and risk of the operation. The underwater environment itself is uncontrollable, and factors such as water flow, bottom sediment, and visibility may affect the stability of the personnel and the accuracy of the operation. Utility Model Content

[0003] The purpose of this utility model is to provide a temporary fixing clamp for underwater maintenance of marine propellers. One worker stands at the stern of the ship's deck and holds a double-handled grip, causing the horizontal pipe at the lower end of the riser and the multi-claw clamp to sink underwater. The multi-claw clamp is brought close to the propeller, and the multi-claw clamp limits the propeller to a stationary state. Then, another underwater worker performs the propeller maintenance operation, thereby solving the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a temporary fixing clamp for underwater maintenance of marine propellers, comprising a double-handled grip, a Z-axis hollow tube welded and fixed to the outer wall of one side of the double-handled grip, a riser tube slidably installed inside the Z-axis hollow tube, and an expansion clamping device one installed at the lower end of the Z-axis hollow tube for limiting the position of the riser tube, an expansion clamping device two installed at the lower end of the riser tube, and a horizontal tube installed inside the expansion clamping device two, with a multi-jaw clamp installed at one end of the horizontal tube.

[0005] Preferably, the Z-axis hollow tube and the riser are both made of stainless steel, and the length of the riser is 1.5m to 2m.

[0006] Preferably, the expansion clamping device one and expansion clamping device two have the same structure. The expansion clamping device two consists of a clamp, a T-shaped screw, and an internally threaded handle. The clamp is welded and fixed to the lower end of the riser. The horizontal pipe slides with the clamp. Two internally threaded handles are installed on one side inside the clamp. One end of the internally threaded handle extends to the outside of the clamp. A T-shaped screw is installed at one end of the internally threaded handle.

[0007] Preferably, the multi-jaw clamp includes a three-jaw chuck threaded onto one end of a horizontal tube and externally threaded steel columns that can be detachably installed on the outer wall of each jaw of the three-jaw chuck.

[0008] Preferably, an external threaded connector is fixed to one end of the horizontal tube, and an internal threaded connector is fixed to the outer wall of the three-jaw chuck on the side away from the jaws, with the internal threaded connector and the external threaded connector being threadedly engaged.

[0009] Preferably, an internal threaded sleeve is fixed on the outer wall of the claw of the three-jaw chuck, and the internal threaded sleeve and one end of the external threaded steel column are threadedly engaged.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This temporary fixing clamp for underwater maintenance of marine propellers, through its structure consisting of a double-handled grip, a riser, a horizontal tube, and a multi-claw clamp working together, allows a worker to stand at the stern of the ship's deck, holding the double-handled grip, and controlling the sinking and position adjustment of the horizontal tube at the lower end of the riser and the multi-claw clamp via a tensioning clamp. This reduces the uncertainty caused by the complex environment faced by divers during underwater operations. The worker can make fine adjustments using the double-handled grip in a safe ship environment, ensuring that the multi-claw clamp can accurately approach the propeller. The fixed position of the propeller lays a solid foundation for subsequent maintenance work. Secondly, the multi-jaw clamp design has the feature of multi-point clamping, which can effectively limit and fix the propeller, keeping it stable in a static state. This greatly reduces unstable factors in underwater operations, such as propeller swaying or slipping, thus providing maintenance personnel with a stable working environment. Moreover, after mechanical fixation, underwater workers have more operating space in the propeller area, and can focus on disassembling, inspecting or replacing parts without worrying about propeller movement or deviation, thereby improving the accuracy and efficiency of maintenance. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0013] Figure 3 This is a three-dimensional cross-sectional structural diagram of the present invention;

[0014] Figure 4 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0015] Figure 5 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 3 ;

[0016] Figure 6 This utility model Figure 5 Enlarged structural diagram at point A in the middle.

[0017] In the diagram: 1. Double-handled grip; 2. Z-axis hollow tube; 3. Expansion clamp one; 4. Vertical tube; 5. Expansion clamp two; 501. Clamp; 502. T-screw; 503. Internal threaded handle; 6. Horizontal tube; 601. External threaded connector; 7. Multi-jaw clamp; 701. Three-jaw chuck; 702. Internal threaded sleeve; 703. External threaded steel column; 704. Internal threaded connector. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0019] Please see Figure 1-6 An embodiment of this utility model provides a temporary fixing clamp for underwater maintenance of a marine propeller, including a double-handled handle 1, a Z-axis hollow tube 2 welded and fixed to the outer wall of one side of the double-handled handle 1, a riser 4 slidably installed inside the Z-axis hollow tube 2, and an expansion clamp 3 installed at the lower end of the Z-axis hollow tube 2 to limit the position of the riser 4. An expansion clamp 5 is installed at the lower end of the riser 4, and a horizontal tube 6 is installed inside the expansion clamp 5. A multi-claw clamp 7 is installed at one end of the horizontal tube 6.

[0020] In underwater operations, due to the complex environment and the influence of water flow, the double-handle grip 1 can help the operator control the fixture more steadily, reduce errors and operator fatigue. The Z-axis hollow tube 2 and the riser tube 4 are both made of stainless steel components, and the length of the riser tube 4 is 1.5m to 2m.

[0021] The expansion clamp 1 (3) and expansion clamp 2 (5) have the same structure. The operator can adjust the position of the riser 4, the horizontal pipe 6, and the multi-claw clamp 7 according to the position of the underwater propeller. At this time, the relative position of the riser 4 and the Z-axis hollow pipe 2 is locked by the expansion clamp 1 (3), and the relative position of the riser 4 and the horizontal pipe 6 is locked by the expansion clamp 2 (5).

[0022] The second type of expansion clamp 5 consists of a clamp 501, a T-screw 502, and an internally threaded handle 503. The clamp 501 is welded and fixed to the lower end of the riser 4. The horizontal pipe 6 is slidably fitted with the clamp 501. Two internally threaded handles 503 are installed on one side inside the clamp 501. One end of the internally threaded handle 503 extends to the outside of the clamp 501. The T-screw 502 is installed on one end of the internally threaded handle 503. Taking the second type of expansion clamp 5 as an example, the operator manually slides the horizontal pipe 6, causing the horizontal pipe 6 and the clamp 501 to slide relative to each other. After the position of the horizontal pipe 6 and the multi-jaw clamp 7 is adjusted, the T-screw 502 is rotated, so that the T-screw 502 tightens the internally threaded handle 503, and then the clamp 501 is tightened and the horizontal pipe 6 is fixed.

[0023] The multi-jaw clamp 7 includes a three-jaw chuck 701 threaded onto one end of a horizontal tube 6 and externally threaded steel columns 703 detachably mounted on the outer wall of each jaw of the three-jaw chuck 701. When the multi-jaw clamp 7 approaches the underwater propeller, the operator adjusts the distance between adjacent jaws of the three-jaw chuck 701 according to the specifications of the underwater propeller, that is, the externally threaded steel columns 703 are adjusted to be between two adjacent propeller blades until the externally threaded steel columns 703 can be locked between two adjacent propeller blades, thereby firmly fixing the target propeller blade and preventing slippage and displacement.

[0024] One end of the horizontal tube 6 is fixed with an external threaded connector 601. An internal threaded connector 704 is fixed on the outer wall of the three-jaw chuck 701 away from the jaws. The internal threaded connector 704 and the external threaded connector 601 are threaded together. An internal threaded sleeve 702 is fixed on the outer wall of the jaws of the three-jaw chuck 701. One end of the internal threaded sleeve 702 and the external threaded steel column 703 are threaded together.

[0025] The clamps can be quickly assembled and disassembled by the threaded engagement of the external threaded steel column 703 and the internal threaded sleeve 702, and the threaded engagement of the internal threaded connector 704 and the external threaded connector 601 at the end of the horizontal tube 6.

[0026] In this embodiment, during use, a worker standing on the deck first holds a double-handled grip 1 and submerges the riser 4, horizontal pipe 6, and multi-jaw clamp 7 into the water. The multi-jaw clamp 7 is then gradually brought closer to the target propeller until it securely locks the underwater propeller. During this operation, the worker closely observes the underwater diver's hand gestures and instructions to ensure the movement direction and force of the multi-jaw clamp 7 meet the actual operational requirements, until the clamp is correctly positioned at the propeller's anchor point. After entering the water, the underwater diver coordinates with the instructions of the onshore worker to ensure... The multi-jaw clamp 7 accurately clamps the fixed part of the propeller; after the multi-jaw clamp 7 limits the propeller, the diver can carry out specific operations such as disassembling, repairing or replacing parts of the propeller. The staff on the deck provides stable support through the double handle 1, allowing the diver to focus on the details of the operation, reducing the tediousness of manual fixing and improving work efficiency; after the diver completes the repair, the diver releases the multi-jaw clamp 7. After the multi-jaw clamp 7 and the propeller are disconnected, the staff on the deck can lift the riser 4, the horizontal pipe 6 and the multi-jaw clamp 7 out of the water.

Claims

1. A temporary fixing clamp for underwater maintenance of marine propellers, characterized in that: It includes a double-handle grip (1), a Z-axis hollow tube (2) welded and fixed on one side of the outer wall of the double-handle grip (1), a riser (4) slidably installed inside the Z-axis hollow tube (2), and a first expansion clamp (3) installed at the lower end of the Z-axis hollow tube (2) for limiting the position of the riser (4). The lower end of the riser (4) is equipped with a second expansion clamp (5), and a horizontal tube (6) is installed inside the second expansion clamp (5). One end of the horizontal tube (6) is equipped with a multi-claw clamp (7).

2. A temporary fixing clamp for underwater maintenance of marine propellers according to claim 1, characterized in that: The Z-axis hollow tube (2) and the riser (4) are both made of stainless steel. The length of the riser (4) is 1.5m to 2m.

3. A temporary fixing clamp for underwater maintenance of marine propellers according to claim 1, characterized in that: The expansion clamping device one (3) and expansion clamping device two (5) have the same structure. The expansion clamping device two (5) consists of a clamp (501), a T-shaped screw (502) and an internal threaded handle (503). The clamp (501) is welded and fixed to the lower end of the riser (4). The horizontal pipe (6) slides with the clamp (501). Two internal threaded handles (503) are installed on one side inside the clamp (501). One end of the internal threaded handle (503) extends through to the outside of the clamp (501). A T-shaped screw (502) is installed on one end of the internal threaded handle (503).

4. A temporary fixing clamp for underwater maintenance of a marine propeller according to claim 1, characterized in that: The multi-jaw chuck (7) includes a three-jaw chuck (701) threaded onto one end of a horizontal tube (6) and externally threaded steel columns (703) that can be detachably installed on the outer wall of each jaw of the three-jaw chuck (701).

5. A temporary fixing clamp for underwater maintenance of a marine propeller according to claim 4, characterized in that: One end of the horizontal tube (6) is fixed with an external threaded connector (601), and an internal threaded connector (704) is fixed on the outer wall of the three-jaw chuck (701) away from the jaws. The internal threaded connector (704) and the external threaded connector (601) are threaded together.

6. A temporary fixing clamp for underwater maintenance of a marine propeller according to claim 4, characterized in that: An internal threaded sleeve (702) is fixed on the outer wall of the claw of the three-jaw chuck (701), and the internal threaded sleeve (702) is threadedly engaged with one end of the external threaded steel column (703).

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