Constant-tension continuous pile washing-out system

Abstract

The utility model provides a constant-tension continuous pile washing-out system, which can automatically adjust the length of a pile washing-out hose in the lifting process of a pile leg so as to realize continuous pile washing-out and keep the stability of operation, and comprises a hose bracket arranged at the top of the pile leg, a constant-tension winch welded and fixed on a ship body, and a control system arranged on the constant-tension winch, the constant tension winch comprises a variable frequency motor and a winch disc, the variable frequency motor is used for controlling the winch disc to rotate, and a connecting end pipe section of a pile washing hose is erected on the hose bracket and is connected with a pile washing main pipe through a union connector after passing through the rear end of the hose bracket. The adjusting section pipe section of the pile washing-out hose is wound on the winch disc, the winch disc is controlled by the variable frequency motor to rotate so that the adjusting section pipe section can be loosened or folded, and the pile washing-out pipe is connected with the pile washing-out pump and the end of the adjusting section pipe section of the pile washing-out hose.

Description

Technical Field

[0001] The utility model relates to a pile driving system used for a self-elevating offshore platform, in particular to a constant tension continuous pile driving system. Background Art

[0002] When a self-elevating offshore platform is operating at sea, it needs to rely on pile legs to be inserted into the seabed strata to meet the requirements of bearing capacity and safety. When the self-elevating offshore platform needs to be moved to another operating area, the pile legs need to be pulled out from the seabed strata. This process of pulling out the pile legs requires overcoming the adsorption force of the seabed strata, and high-pressure pile driving is an effective means to solve this problem.

[0003] The existing pile-driving system of a self-elevating offshore platform includes a pile-driving main pipe located in the pile leg and a pile-driving pipe located in the hull. One end of the pile-driving pipe is connected to a high-pressure pile-driving pump, and the other end of the pile-driving pipe is connected to the pile-driving main pipe through a pile-driving hose. The pile-driving hose and the pile-driving main pipe of the existing self-elevating offshore platform pile-driving system are connected together by a union joint. In the process of pulling piles, as the pile legs are continuously lifted, the union joint of the pile-driving hose at the end of the pile legs is also lifted. Therefore, after the pile legs are lifted for a certain distance, the pile-driving hose needs to be removed and then connected to another union joint below. The pile-driving operation needs to be stopped during this removal and replacement process, so the pile-driving efficiency is low and the pile-driving cannot be continued, which also makes the pile-driving effect unsatisfactory. In addition, this removal and replacement action needs to be performed manually, and the union joint and the pile-driving hose are heavy, so this process requires at least two crew members to operate with the cooperation of a crane, which consumes manpower and affects the operation efficiency. Utility Model Content

[0004] The utility model aims to provide a constant tension continuous pile punching system, which can automatically adjust the length of the pile punching hose during the lifting and lowering of the pile legs, thereby realizing continuous pile punching and maintaining the stability of the operation.

[0005] The purpose of the utility model is achieved in this way:

[0006] A constant tension continuous pile-driving system comprises: a pile-driving pump, a pile-driving pipe, a constant tension winch, a pile-driving hose, a hose bracket, a union joint and a pile-driving main pipe, wherein the hose bracket is arranged on the top of the pile leg, the constant tension winch is welded and fixed on the hull, the constant tension winch comprises a variable frequency motor and a winch disc, the variable frequency motor is used to control the rotation of the winch disc, the pile-driving hose comprises a connecting end pipe section and an adjusting section pipe section, the connecting end pipe section is mounted on the hose bracket and the end of the connecting end pipe section is connected to the pile-driving main pipe through the union joint after passing through the hose bracket, the adjusting section pipe section is wound on the winch disc and the winch disc is controlled by the variable frequency motor to rotate so that the adjusting section pipe section is relaxed or retracted, the constant tension winch always provides a constant pulling force to the pile-driving hose when the adjusting section pipe section is relaxed, and the pile-driving pipe connects the pile-driving pump and the ends of the adjusting section pipe section.

[0007] When driving piles, seawater flows into the pile driving hose through the pile driving pipe through the pile driving pump, and flows into the pile driving main pipe through the union, thereby realizing the pile driving operation. After the pile shoe is loosened, the platform starts to pull up the pile leg. At this time, the variable frequency motor of the constant tension winch is started to drive the winch disc to rotate to loosen the adjustment section pipe section, thereby increasing the length of the pile driving hose, so that the speed of increasing the length of the pile driving hose is matched with the speed of the pile leg rising, and during the growth of the pile driving hose, the constant tension winch always applies a constant pulling force to it.

[0008] The constant tension continuous pile driving system proposed by the utility model adopts the above technical solution, so that the length of the pile driving hose can be adjusted by the constant tension hose winch during the lifting and lowering of the pile legs, thereby realizing continuous pile driving; in addition, the constant tension winch applies a constant tension to the pile driving hose, which can effectively prevent the pile driving hose from swinging and affecting the pile driving operation. The constant tension continuous pile driving system proposed by the utility model is easy to operate and can be widely used in various self-elevating offshore platforms, releasing manpower while maintaining the stability of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Other advantages and features of the present invention are shown by the following embodiments of the present invention in combination with the description of the accompanying drawings. The embodiments are given in the form of examples, but are not limited thereto, wherein:

[0010] Figure 1 The present invention is a schematic structural diagram of a preferred embodiment of the constant tension continuous pile driving system proposed by the present invention. DETAILED DESCRIPTION

[0011] As shown in the figure, a constant tension continuous pile driving system includes: a pile driving pump 1, a pile driving pipe 2, a constant tension winch 3, a pile driving hose 4, a hose bracket 5, a union 6 and a pile driving main pipe 7. Among them, the hose bracket 5 is arranged on the top of the pile leg 8, the constant tension winch 3 is welded and fixed on the hull 9, and the constant tension winch 3 includes a variable frequency motor 31 and a winch disc 32, and the variable frequency motor 31 is used to control the rotation of the winch disc 32. The pile driving hose 4 includes a connecting end pipe section 41 and an adjusting section pipe section 42. The connecting end pipe section 41 is mounted on the hose bracket 5 and the end of the connecting end pipe section 41 is connected to the pile driving main pipe 7 through the union 6 after passing through the hose bracket 5. The adjusting section pipe section 42 is wound on the winch disc 32 and the winch disc 32 is controlled by the variable frequency motor 31 to rotate so that the adjusting section pipe section 42 is relaxed or retracted. The pile driving pipe 2 connects the pile driving pump 1 and the ends of the adjusting section pipe section 42. In the process of loosening to make the pile driving hose 4 grow, the constant tension winch 3 always applies a constant pulling force to the pile driving hose 4 .

[0012] When driving piles, seawater flows into the pile driving hose through the pile driving pipe through the pile driving pump, and flows into the pile driving main pipe through the union, thereby realizing the pile driving operation. After the pile shoe is loosened, the platform starts to pull up the pile leg. At this time, the variable frequency motor of the constant tension winch is started to drive the winch disc to rotate to increase the length of the pile driving hose, so that the speed of increasing the length of the pile driving hose is matched with the speed of raising the pile leg, and during the growth of the pile driving hose, the constant tension winch always applies a constant pulling force to it.

[0013] Although the present invention has been described above based on the preferred embodiments, this does not mean that the scope of the present invention is limited to the above-mentioned structure. As long as the technicians in this technical field can easily develop equivalent alternative structures after reading the above description, the equal changes and modifications made without departing from the spirit and scope of the present invention should all be included in the patent scope of the present invention.

Claims

1. A constant tension continuous pile punching system, characterized in that: include: A pile driving pump, a pile driving pipe, a constant tension winch, a pile driving hose, a hose bracket, a union joint and a pile driving main pipe, wherein the hose bracket is arranged on the top of the pile leg, the constant tension winch is welded and fixed on the hull, the constant tension winch comprises a variable frequency motor and a winch disc, the variable frequency motor is used to control the rotation of the winch disc, the pile driving hose comprises a connecting end pipe section and an adjusting section pipe section, the connecting end pipe section is mounted on the hose bracket and the end of the connecting end pipe section is connected to the pile driving main pipe through the union joint after passing through the hose bracket, the adjusting section pipe section is wound on the winch disc and the winch disc is controlled by the variable frequency motor to rotate so that the adjusting section pipe section is relaxed or retracted, the constant tension winch always provides a constant pulling force to the pile driving hose when the adjusting section pipe section is relaxed, and the pile driving pipe connects the pile driving pump and the ends of the adjusting section pipe section.

Images