PCTC rudder stock body pre-embedding method

Abstract

This invention relates to the field of shipbuilding technology and discloses a method for pre-embedding the rudder stock body of a PCTC ship, including the following steps: Step S1, a through hole is opened in the first deck directly above the rudder gear seat, the diameter of the through hole being larger than the outer diameter of the rudder stock body. This method for pre-embedding the rudder stock body of a PCTC ship, by pre-embedding the rudder stock body and opening a through hole in the first deck directly above the rudder gear seat, temporarily fixes the rudder stock body to the support frame after pre-embedding. It eliminates the need to damage 3-5 deck layers for formal installation, fundamentally avoiding repair processes such as welding and painting. Multiple layers of hull structure above the rudder stock body can be installed simultaneously and continuously. While ensuring the installation space requirements of the rudder stock body, it allows the hull structure above the rudder stock body to be installed continuously according to plan, resolving the interference contradiction between installation space and hull structure, and eliminating the dock operations stagnation caused by waiting for the rudder stock body installation in traditional processes.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding technology, specifically to a method for pre-embedding the rudder stock of a PCTC ship. Background Technology

[0002] PCTC (Car and Roll-on / Car Transporter) vessels require a critical step in their construction: rudder stock installation. As the rigid shaft connecting the rudder blades and the steering mechanism, the rudder stock installation can only proceed after the integrity of the entire stern hull structure and the intersection of the shaft and rudder system have been checked. The rudder stock is approximately 6 meters long and is installed vertically using a crane. This requires unobstructed vertical space above the steering gear mount. Since PCTC vessels typically have multiple car decks at the stern (usually up to eight), rudder stock installation must ensure unobstructed vertical space above the steering gear mount. Existing methods include: First, suspending the installation of the hull structure above the rudder stock until the rudder stock is installed. This method causes a halt to the installation of sections in the dry dock, significantly extending the construction period. Second, installing the hull structure above the rudder stock first, then installing it on the deck above the steering gear mount, usually involving 3-5 layers of openings to pass through the rudder stock. This method compromises the integrity of the hull structure, requiring additional welding and painting repairs, significantly increasing construction costs and time.

[0003] Neither of the above methods can simultaneously ensure both dock cycle control and hull structural integrity: the former causes construction process interruption, while the latter leads to structural damage and secondary repairs.

[0004] Therefore, there is an urgent need for a method for pre-embedding the PCTC ship rudder stock. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a method for pre-embedding the PCTC ship rudder stock, thus solving the problems mentioned in the background.

[0006] This invention provides the following technical solution: a method for pre-embedding the body of a PCTC ship rudder stock, comprising the following steps:

[0007] Step S1: A through hole is made in the first deck directly above the rudder mount, and the diameter of the through hole is larger than the outer diameter of the rudder body;

[0008] Step S2: A support frame is installed in the servo compartment where the servo mount is located. The support frame is used to support the lower end of the servo stick.

[0009] Step S3: Install a temporary lifting ring on the second deck top directly above the pre-embedded position of the rudder stock body;

[0010] Step S4: When the hull structure below the first deck in the rudder system area is complete, perform the pre-embedding operation;

[0011] Step S5, after the hull structure from the first deck to the second deck is installed:

[0012] Connect the lower end of the wire rope to the eye bolt at the top of the rudder stock body via a shackle;

[0013] The upper end of the wire rope passes through the temporary lifting ring and is tensioned and fixed.

[0014] Preferably, in step S1, a plurality of rudder stock fixing channel steels for fixing the rudder stock body are provided at the position of the through hole corresponding to the top of the first deck.

[0015] Preferably, the plurality of said rudder stock fixing channel steels are arranged in a ring array along the central axis of the rudder stock body, and the rudder stock fixing channel steels are detachably fixed to the first deck by bolts.

[0016] Preferably, in step S3, the rated ultimate load of the temporary lifting ring is greater than 1.5 times the weight of the rudder stock.

[0017] Preferably, the pre-embedding operation in step S4 specifically involves: using a crane to vertically lift the rudder stick body to above the center of the rudder gear base, with the lower end of the rudder stick body passing through the through hole, so that the lower end of the rudder stick body abuts against the support frame.

[0018] Preferably, the support bracket is located directly above the servo mount, and the bottom of the support bracket is bolted to the bottom plate of the servo compartment, and the bottom of the support bracket is mounted on the bottom load-bearing structure of the servo compartment.

[0019] Preferably, the support frame is a rigid bracket, and the top of the support frame is provided with a diagonal bracing channel steel for supporting the rudder stock body.

[0020] Preferably, in step S5, the wire rope is tensioned by a hand-operated hoist or a rope tensioner.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. This invention, by pre-embedding the rudder stock body and opening a through hole in the first deck directly above the rudder mount, temporarily fixes the rudder stock body to the support frame after pre-embedding. This eliminates the need to damage 3-5 deck structures for formal installation, fundamentally avoiding repair processes such as welding and painting. The multi-layer hull structure above the rudder stock body can be installed simultaneously and continuously. While ensuring the installation space requirements of the rudder stock body, it allows the hull structure above the rudder stock body to be installed continuously according to plan, resolving the interference contradiction between installation space and hull structure, and eliminating the dock operation stagnation caused by waiting for the installation of the rudder stock body in traditional processes.

[0023] 2. This invention, by setting up a triple fixing mechanism of bearing the weight of the rudder stock body through a support frame, preventing the rudder stock body from tipping over with a rudder stock fixing channel steel, and tensioning steel wire rope, ensures the stability of the rudder stock body during the pre-embedding period and reduces the risk of falling from a height. Attached Figure Description

[0024] Figure 1 This is a flowchart of the present invention;

[0025] Figure 2 This is a schematic diagram of the first deck structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the present invention.

[0027] In the diagram: 1. Steering gear mount; 2. First deck; 3. Through hole; 4. Steering stock body; 5. Second deck; 6. Temporary lifting ring; 7. Support frame; 8. Wire rope; 9. Steering stock fixing channel steel; 10. Steering gear compartment. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figure 1-3 The PCTC ship rudder stock pre-embedding method includes the following steps:

[0030] Step S1: A through hole 3 is made on the first deck 2 directly above the rudder base 1. The diameter of the through hole 3 is larger than the outer diameter of the rudder stick body 4.

[0031] Step S2: A support frame 7 is provided in the servo compartment 10 where the servo mount 1 is located. The support frame 7 is used to support the lower end of the servo stick.

[0032] Step S3: Install a temporary lifting ring 6 on the top of the second deck 5 directly above the pre-embedded position of the rudder stock body 4;

[0033] Step S4: When the hull structure of the first deck 2 and below in the rudder system area is complete, perform the pre-embedding operation;

[0034] Step S5, after the hull structure from the first deck 2 to the second deck 5 is installed:

[0035] Connect the lower end of the wire rope 8 to the eye bolt at the top of the rudder body 4 via a shackle;

[0036] The upper end of the steel wire rope 8 passes through the temporary lifting ring 6 and is tensioned and fixed.

[0037] A through hole 3 is opened on the first deck 2 directly above the rudder mount 1, and the rudder stock body is temporarily fixed to the support frame 7. There is no need to damage the 3-5 deck structure for formal installation, which fundamentally avoids repair processes such as welding and painting. The multi-layer hull structure above the rudder stock body 4 can be installed simultaneously and continuously. While ensuring the installation space requirements of the rudder stock body 4, the hull structure above the rudder stock body 4 can be installed continuously according to plan, which solves the interference contradiction between installation space and hull structure and eliminates the dock operation stagnation caused by waiting for the installation of the rudder stock body 4 in the traditional process.

[0038] In step S1, multiple rudder stock fixing channel steels 9 are provided at the position of the through hole 3 corresponding to the top of the first deck 2 for fixing the rudder stock body 4. The multiple rudder stock fixing channel steels 9 are arranged in a ring array along the central axis of the rudder stock body 4. The rudder stock fixing channel steels 9 are detachably fixed to the first deck 2 by bolts.

[0039] In step S3, the rated ultimate load of the temporary lifting ring 6 is greater than 1.5 times the weight of the rudder stock.

[0040] The pre-embedding operation in step S4 is as follows: the rudder stick body 4 is vertically lifted by a crane to the center above the rudder base 1, and the lower end of the rudder stick body 4 passes through the through hole 3, so that the lower end of the rudder stick body 4 abuts against the support frame 7.

[0041] The support bracket 7 is located directly above the servo mount 1. The bottom of the support bracket 7 is fixed to the bottom plate of the servo compartment 10 with bolts, and the bottom of the support bracket 7 is installed on the bottom load-bearing structure of the servo compartment 10.

[0042] The support frame 7 is a rigid bracket, and the top of the support frame 7 is provided with a diagonal bracing channel steel for supporting the rudder stock body 4.

[0043] In step S5, the wire rope 8 is tensioned by a hand-operated hoist or a rope tensioner.

[0044] like Figure 2 As shown, a through hole 3 is made on the first deck 2 directly above the rudder mount 1. The diameter of the through hole 3 is larger than that of the rudder stick body 4.

[0045] like Figure 2-3 As shown, a support frame 7 is placed directly above the rudder mount 1. This support frame 7 supports the weight of the rudder stock body 4 and fixes the lower end of the rudder stock. A temporary lifting ring 6 is installed on the top of the second deck 5 directly above the rudder stock body 4. The rudder system hull structure of the first deck 2 and below is pre-embedded after the rudder system is completed. The rudder stock body 4 is vertically lifted by a crane and dropped vertically after reaching the center position above the rudder mount 1. It passes through the through hole 3 on the first deck 2, and the lower end of the rudder stock body 4 falls onto the support frame 7 and is fixed with diagonal bracing channel steel. At this time, the weight of the rudder stock is completely supported by the support frame 7.

[0046] On the first deck 2, the rudder stock body 4 is fixed with the rudder stock fixing channel steel 9 to prevent the rudder stock body 4 from tipping over. After the hull structure from the first deck 2 to the second deck 5 is installed, one end of the wire rope 8 is connected to the eye bolt at the upper end of the rudder stock body 4 through a shackle, and the other end of the wire rope 8 is passed through the temporary eye bolt 6 above and tightened to strengthen the fixation of the rudder stock.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method of embedding a rudder stock of a PCTC, characterized in that, Includes the following steps: Step S1: A through hole (3) is made in the first deck (2) directly above the rudder base (1), and the diameter of the through hole (3) is larger than the outer diameter of the rudder body (4); Step S2, a support frame (7) is provided in the servo compartment (10) where the servo mount (1) is located. The support frame (7) is used to support the lower end of the servo stick. Step S3: Install a temporary lifting ring (6) on the second deck (5) directly above the pre-embedded position of the rudder stock body (4); Step S4: When the hull structure of the first deck (2) and below in the rudder system area is complete, perform the pre-embedding operation; Step S5, after the hull structure from the first deck (2) to the second deck (5) is installed: The lower end of the wire rope (8) is connected to the eye bolt at the top of the rudder body (4) via a shackle; The upper end of the wire rope (8) passes through the temporary lifting ring (6) and is tensioned and fixed.

2. The PCTC rudder post embedding method according to claim 1, characterized in that, In step S1, multiple rudder rod fixing channel steels (9) for fixing the rudder rod body (4) are provided at the position of the through hole (3) corresponding to the top of the first deck (2).

3. The PCTC ship rudder stock pre-embedding method according to claim 2, characterized in that, Multiple rudder stock fixing channel steels (9) are arranged in a ring array along the central axis of the rudder stock body (4), and the rudder stock fixing channel steels (9) are detachably fixed to the first deck (2) by bolts.

4. The PCTC ship rudder stock pre-embedding method according to claim 1, characterized in that, In step S3, the rated ultimate load of the temporary lifting ring (6) is greater than 1.5 times the weight of the rudder stock.

5. The PCTC ship rudder stock pre-embedding method according to claim 1, characterized in that, The pre-embedded operation in step S4 is as follows: the rudder stick body (4) is vertically lifted by a crane to the center above the rudder base (1), and the lower end of the rudder stick body (4) passes through the through hole (3) so that the lower end of the rudder stick body (4) abuts against the support frame (7).

6. The PCTC rudder post embedding method according to claim 5, characterized in that, The support bracket (7) is located directly above the servo mount (1). The bottom of the support bracket (7) is fixed to the bottom plate of the servo compartment (10) with bolts, and the bottom of the support bracket (7) is installed on the bottom load-bearing structure of the servo compartment (10).

7. The PCTC rudder post embedding method according to claim 5, wherein, The support frame (7) is a rigid bracket, and the top of the support frame (7) is provided with a diagonal bracing channel steel for supporting the rudder body (4).

8. The PCTC rudder post embedding method according to claim 1, characterized in that, In step S5, the wire rope (8) is tensioned by a hand-operated hoist or a rope tensioner.

Images