Method for sealing shaft hole before ship undulation

Abstract

The invention provides a method for sealing a shaft hole before ship undulation, which comprises the following steps of: welding a channel steel bracket at the front section of the shaft hole in a segmented manner in the center of the shaft hole, and welding a first lifting ring structure at the center of the channel steel parallel to the shaft hole; manufacturing a sealing steel plate, and welding a second hanging ring structure in the middle of the sealing steel plate; a rubber sealing ring is mounted in the sealing steel plate; one end of a steel wire rope is connected with the sealing steel plate through a second hanging ring structure, and the other end of the steel wire rope is connected with a manual hoisting structure through a tension instrument; electrifying the tension instrument electric box, and determining the acting force applied to the shaft hole steel casting; and when the acting force of operating the manual hoisting structure reaches a set value, operation is stopped, the manual hoisting structure is locked, the tension instrument is used, and the shaft hole reaches a thorough sealing state. According to the technical scheme, the labor hour amount can be reduced, the building precision and building quality of a ship are guaranteed, the construction efficiency is improved, and the service life of the shaft is effectively prolonged.

Description

Technical Field

[0001] The present invention belongs to the technical field of shipbuilding, and particularly relates to a method for sealing the front shaft hole during ship undulation. Background Art

[0002] During shipbuilding, due to the tight shipyard construction period, in order to improve shipbuilding efficiency, semi-ship undulation and displacement are involved. Currently, the method for sealing the front shaft hole before undulation is to weld a sealing plate to achieve a sealed state. After the undulation and landing, the welding needs to be removed and polished, which greatly damages the cast steel parts of the shaft hole, affects the service life of the shaft hole, and also reduces the amount of man-hours.

[0003] Therefore, how to provide a method for sealing the front shaft hole during ship undulation, which can reduce the amount of man-hours, ensure the construction accuracy and quality of the ship, improve the construction efficiency and effectively extend the service life of the shaft, has become an urgent technical problem to be solved. Summary of the Invention

[0004] The embodiment of the present invention provides a method for sealing the front shaft hole during ship undulation, which can reduce the amount of man-hours, ensure the construction accuracy and quality of the ship, improve the construction efficiency and effectively extend the service life of the shaft.

[0005] In the embodiment of the present invention, a method for sealing the front shaft hole during ship undulation is provided, including:

[0006] S101. Weld a channel steel bracket at the front section of the shaft hole. The position of the channel steel bracket is at the center of the shaft hole. Weld the channel steel at the front section, fix it by welding a triangular bracket, and weld a first lifting ring structure parallel to the center of the shaft hole.

[0007] S102. Manufacture a sealing steel plate, and weld a second lifting ring structure at the center of the sealing steel plate.

[0008] S103. Install a rubber sealing ring inside the sealing steel plate.

[0009] S104. One end of a steel wire rope is connected to the sealing steel plate through the second lifting ring structure, the other end is connected to a manual hoisting structure through a tension instrument, and the other end of the manual hoisting structure is connected to the channel steel bracket through the first lifting ring structure.

[0010] S105. Power on the electric box of the tension instrument to determine the magnitude of the force applied to the cast steel part of the shaft hole.

[0011] S106. When the force of the manual hoisting structure reaches the set value, stop the operation, lock the manual hoisting structure, remove the tension instrument after use, and the shaft hole reaches a completely sealed state.

[0012] Further, weld an angle steel bracket at the front section of the shaft hole;

[0013] A sling structure is welded to the angle steel bracket parallel to the center position of the shaft hole, and the angle steel bracket is fixed by a triangular bracket.

[0014] Further, a rubber sealing ring is installed inside the sealing steel plate, including:

[0015] The rubber sealing ring is fixed with double-sided tape to prevent the rubber sealing ring from falling off.

[0016] Further, one end of a steel wire rope is connected to the sealing steel plate, and the other end is connected to a manual hoisting structure through a tension instrument, including:

[0017] One end of the steel wire rope is connected to the sling at the sealing steel plate, the other end is connected to a chain block through a tension instrument, and the other end of the chain block is connected to the channel steel bracket through the first sling structure.

[0018] Further, when the acting force of the manual hoisting structure reaches the set value, stop the operation and lock the manual hoisting structure. After the tension instrument is used up, remove it, and the shaft hole reaches a completely sealed state, including:

[0019] The tension instrument is powered on, and the operator operates the chain block. When the acting force reaches the set value, stop the operation. After the tension instrument is used up, lock the chain block, and the shaft hole reaches a completely sealed state.

[0020] Further, the first sling structure and the second sling structure are welded by full welding.

[0021] The beneficial effects brought by the present invention are as follows:

[0022] As can be seen from the above solution, the embodiment of the present invention provides a method for closing the shaft hole before the ship undulates. A channel steel bracket is welded in the previous section of the shaft hole, and the position of the channel steel bracket is at the center position of the shaft hole. The channel steel is welded at the previous section, and a triangular bracket is welded for fixation. A first sling structure is welded to the channel steel parallel to the center of the shaft hole; a sealing steel plate is made, and a second sling structure is welded at the center of the sealing steel plate; a rubber sealing ring is installed inside the sealing steel plate; one end of a steel wire rope is connected to the sealing steel plate through the second sling structure, and the other end is connected to a manual hoisting structure through a tension instrument. The other end of the manual hoisting structure is connected to the channel steel bracket through the first sling structure; the electric box of the tension instrument is powered on to determine the magnitude of the acting force applied to the cast steel part of the shaft hole; when the acting force of the manual hoisting structure reaches the set value, stop the operation and lock the manual hoisting structure. After the tension instrument is used up, remove it, and the shaft hole reaches a completely sealed state. The technical solution of the present invention can reduce the amount of manual work, ensure the construction accuracy and quality of the ship, improve the construction efficiency, and effectively extend the service life of the shaft. Description of the Drawings

[0023] Figure 1 It shows a flowchart of a method for closing the front shaft hole of a ship during undulation according to an embodiment of the present invention;

[0024] Figure 2 It shows a schematic diagram of a method for closing the front shaft hole of a ship during undulation according to an embodiment of the present invention. Detailed Embodiments

[0025] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] In an embodiment of the present invention, a method for closing the front shaft hole of a ship during undulation uses a sealing steel plate to close the front shaft hole during undulation. A sealing ring is installed inside the steel plate, and a hoist is used to apply force to the shaft hole sealing plate to achieve a completely closed state of the shaft hole. The applied force can be seen through a puller, and the force applied by the hoist to the sealing plate can be effectively determined to ensure that the steel casting of the shaft hole will not be damaged, so as to achieve a completely closed state of the shaft hole. Currently, the method for closing the front shaft hole during undulation is to weld a sealing plate to achieve a sealed state. After the undulation and landing, the welding needs to be removed and polished, which will damage the steel casting of the shaft hole.

[0027] As Figure 1 and Figure 2 shown, Figure 1 It shows a flowchart of a method for closing the front shaft hole of a ship during undulation according to an embodiment of the present invention, Figure 2 It shows a schematic diagram of a method for closing the front shaft hole of a ship during undulation according to an embodiment of the present invention.

[0028] Figure 1 In it, a method for closing the front shaft hole of a ship during undulation includes:

[0029] S101. Weld a channel steel bracket at the front section of the shaft hole. The position of the channel steel bracket is at the center of the shaft hole. Weld the channel steel at the front section, fix it by welding a triangular bracket, and weld a first lifting ring structure parallel to the center of the shaft hole;

[0030] S102. Fabricate a sealing steel plate and weld a second lifting ring structure at the center of the sealing steel plate;

[0031] S103. Install a rubber sealing ring inside the sealing steel plate;

[0032] S104. One end of a steel wire rope is connected to the sealing steel plate through the second sling structure, and the other end is connected to a manual hoisting structure through a tensile instrument. The other end of the manual hoisting structure is connected to the channel steel bracket through the first sling structure;

[0033] S105. The electric box of the tensile instrument is powered on to determine the magnitude of the acting force applied to the shaft hole cast steel part;

[0034] S106. When the acting force of the manual hoisting structure reaches the set value, stop the operation and lock the manual hoisting structure. After the tensile instrument is used, remove it, and the shaft hole reaches a completely sealed state.

[0035] In the embodiment of the present invention, the load-bearing capacity of the first sling structure and the second sling structure is 1T. It is fixed by welding a triangular bracket to ensure the stability of the angle steel.

[0036] In the present invention, a method for closing the shaft hole before the ship undulates can reduce the amount of manual work, effectively ensure the construction accuracy and quality of the ship, improve the construction efficiency, and effectively extend the service life of the shaft.

[0037] In another embodiment of the present invention, an angle steel bracket is welded in the previous section of the shaft hole;

[0038] A sling structure is welded to the angle steel bracket parallel to the center position of the shaft hole, and the angle steel bracket is fixed by a triangular bracket.

[0039] In another embodiment of the present invention, a rubber sealing ring is installed inside the sealing steel plate, including:

[0040] The rubber sealing ring is fixed with double-sided tape to prevent the rubber sealing ring from falling off.

[0041] It can be understood that in other embodiments of the embodiment of the present invention, the rubber sealing ring can also be fixed by other fixing methods according to needs. The specific method is not specifically limited here.

[0042] In another embodiment of the present invention, one end of a steel wire rope is connected to the sealing steel plate, and the other end is connected to a manual hoisting structure through a tensile instrument, including:

[0043] One end of the steel wire rope is connected to the sling at the sealing steel plate, the other end is connected to a chain block through a tensile instrument, and the other end of the chain block is connected to the channel steel bracket through the first sling structure.

[0044] In the embodiment of the present invention, prepare an 8m steel wire rope, connect one end to the sealing steel plate, connect the other end to a manual 1T hoist, and fix the other end with a shackle of the tensile instrument. Fix the shackle at the other end of the tensile instrument at the sling position of the channel steel bracket.

[0045] In another embodiment of the present invention, when the acting force of the manual hoisting structure reaches the set value, the operation is stopped and the manual hoisting structure is locked. After the use of the tensile instrument, it is removed, and the shaft hole reaches a completely sealed state, including:

[0046] The tensile instrument is powered on, and the operator operates the chain hoist. When the acting force reaches the set value, the operation is stopped. After the use of the tensile instrument, the chain hoist is locked, and the shaft hole reaches a completely sealed state.

[0047] In another embodiment of the present invention, the first lifting ring structure and the second lifting ring structure are welded by full penetration welding.

[0048] In another embodiment of the present invention, a method for closing the shaft hole before the ship fluctuates is provided, including the following steps:

[0049] S1. Weld a channel steel bracket at the previous section of the shaft hole.

[0050] The position of the channel steel bracket is at the center of the shaft hole. The channel steel is welded at the previous section, and a triangular bracket is welded for fixation. A 1T lifting ring structure is welded parallel to the center of the shaft hole. The lifting ring structure is used for pulling the hoist.

[0051] S2. Fabricate a sealing steel plate with a diameter of 1280 mm and a thickness of 10 mm, and weld a 1T lifting ring at the center of the sealing steel plate for the convenience of pulling the hoist at the other end.

[0052] S3. Install a rubber sealing ring with an outer diameter of 1280 mm and an inner diameter of 1200 mm inside the sealing steel plate and fix it with strong double-sided tape.

[0053] S4. Prepare an 8m steel wire rope. One end is connected to the sealing steel plate, one end is connected to a manual 1T hoist, and the other end is connected to the shackle of the tensile instrument for fixation. The other end of the tensile instrument is fixed to the lifting ring position of the channel steel bracket.

[0054] S5. Power on the electric box of the tensile instrument to facilitate checking how much force is applied to the cast steel part of the shaft hole.

[0055] S6. When the operator operates the hoist and the force reaches 50 NM, stop the operation and lock the hoist. After the use of the tensile electric box, it is removed, and the shaft hole can reach a completely sealed state.

[0056] In one embodiment of the present invention, in step S1, weld a channel steel bracket at the previous section of the shaft hole.

[0057] Prepare an angle steel, about 3M in height. Weld a 1T lifting ring parallel to the center of the shaft hole on the angle steel bracket. The angle steel must be fixed with a triangular bracket to ensure the stability of the angle steel.

[0058] In another embodiment of the present invention, in step S2, a sealing steel plate with a diameter of 1280 mm and a thickness of 10 mm is fabricated, and a 1T lifting ring needs to be installed at the center position of the sealing steel plate for standby. And a rubber sealing ring with an outer diameter of 1280 mm and an inner diameter of 1200 mm is installed on the sealing steel plate, and the sealing ring is fixed to the sealing steel plate with double-sided tape to prevent the sealing ring from falling off.

[0059] In another embodiment of the present invention, in step S4 of the bamboo joint, a 8m steel wire rope is prepared, one end of which is connected to the sealing steel plate, one end is connected to a manual 1T hoist, and the other end is connected to a tension instrument shackle for fixation, and the other end of the tension instrument is fixed to the lifting ring position of the channel steel bracket by a shackle.

[0060] In another embodiment of the present invention, in steps S5 and S6, the power supply of the tension instrument electric box is turned on to facilitate viewing of the force applied to the cast steel part of the shaft hole. When the operator operates the hoist and the force reaches 50 NM, the operation is stopped, the hoist is locked, and after the use of the tension electric box is completed, it is removed, and the shaft hole can reach a completely sealed state.

[0061] The above are the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art of the present technology, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A method for closing a front axle hole of a ship, characterized in that: The closure method comprises: S101, welding a channel steel bracket in the front section of the shaft hole, wherein the channel steel bracket is located at the center of the shaft hole, welding the channel steel at the front section, welding a triangular bracket to fix it, and welding a first lifting ring structure at the center of the channel steel parallel to the shaft hole; S102, manufacturing a sealing steel plate, and welding a second lifting ring structure at the center of the sealing steel plate; S103, installing a rubber sealing ring inside the sealing steel plate; S104, using one end of a steel wire rope to connect the sealing steel plate through the second lifting ring structure, and the other end to connect the manual lifting structure through a tension instrument, and the other end of the manual lifting structure to connect the channel steel bracket through the first lifting ring structure; S105, the electric box of the tension instrument is powered on to determine the magnitude of the force applied to the shaft hole steel casting; S106, when the operating force of the manual lifting structure reaches the set value, the operation is stopped and the manual lifting structure is locked, and the use of the tension instrument is finished and it is removed, and the shaft hole is completely sealed.

2. A method for closing a ship heaving front axle hole according to claim 1, characterized in that: Weld an angle steel bracket in sections in front of the shaft hole; The angle steel bracket is welded with a lifting ring structure parallel to the center of the shaft hole, and the angle steel bracket is fixed by a triangular bracket.

3. A method for sealing a ship heaving front axle hole according to claim 1, characterized in that: A rubber sealing ring is installed inside the sealing steel plate, including: The rubber sealing ring is fixed with double-sided tape to prevent the rubber sealing ring from falling off.

4. A method for sealing a front axle hole of a ship according to claim 1, characterized in that: One end of a steel wire rope is connected to the sealing steel plate, and the other end is connected to a manual lifting structure through a tension instrument, including: One end of the steel wire rope is connected to the lifting ring at the sealing steel plate, and the other end is connected to the hand chain hoist through a tension instrument, and the other end of the hand chain hoist is connected to the channel steel bracket through the first lifting ring structure.

5. A method for closing a ship heaving front axle hole according to claim 4, characterized in that: When the force of the manual lifting structure reaches the set value, the operation is stopped and the manual lifting structure is locked. The tension instrument is removed after use, and the shaft hole is completely sealed, including: The tension instrument is powered on, and the operator operates the hand chain hoist. When the applied force reaches a set value, the operation is stopped. The use of the tension instrument is terminated, the hand chain hoist is locked, and the shaft hole is completely sealed.

6. A method for closing a ship heaving front axle hole according to any one of claims 1 to 5, characterized in that: The first lifting ring structure and the second lifting ring structure are welded by full welding.

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