WO2019000750A1

WO2019000750A1 - Method for installing propeller shaft bracket

Info

Publication number: WO2019000750A1
Application number: PCT/CN2017/108826
Authority: WO
Inventors: 熊飞; 谭继良; 姚杰; 李伟; 孙振财
Original assignee: 广船国际有限公司
Priority date: 2017-06-28
Filing date: 2017-10-31
Publication date: 2019-01-03
Also published as: CN107323608A

Abstract

A method for installing a propeller shaft bracket: providing a propeller shaft bracket (2); during a segment (1) assembly stage, installing the propeller shaft bracket (2) on a segment (1) and then hanging the same together with the segment (1) on a dock for large joining assembly. Using the present method for installing a propeller shaft bracket may reduce the difficulty of installation for the propeller shaft bracket, increase the safety of operation, and may further accurately control installation accuracy, shorten docking period, and save production costs.

Description

Clamping frame mounting method

Technical field

The invention relates to the technical field of ships, and in particular to a method for installing a truss frame.

Background technique

The special type of ship with the truss shaft system is generally a long shaft system capable of spanning several large closed sections. In the installation process of the truss frame, the precision of the control shaft system is difficult.

At present, the common installation method for the boring frame is to mount the shafting section in the docking stage, and then adjust according to the axis installation and the subsequent initial pulling line. Due to the large size and heavy weight of the single-piece boring frame, for example, the size of the single-piece boring frame is 2.4×7×8m (length×width×height) and the weight is 60t, which is equivalent to the specification of the medium-sized segment. In the docking stage, the positioning method of the boring frame is required to be carried out by using the hoist-assisted lifting positioning method. Therefore, the conventional boring frame mounting method has the following disadvantages: 1. During the assembly process, it is necessary to temporarily install a plurality of lifting codes on the periphery of the outer panel and on the boring frame, and hang the code at some positions. In the process of the high-altitude vehicle, it is difficult to operate, and it is necessary to repeatedly erect and disassemble in the hoisting of the truss frame in the later stage, which consumes a lot of manpower and material resources, which is not conducive to saving production costs. 2. In the process of installation, the truss frame needs to be lifted by 10.8m, which is a high-altitude operation. The danger of operation is high, the safety factor is poor, and the quality of the boring frame is heavy, and the installation is difficult. 3. The dock is an important resource for the shipyard. It takes a long time to assemble and adjust in the dock by using the traditional welding method, which extends the dock cycle.

Summary of the invention

An object of the present invention is to provide a method for mounting a creel frame, which can reduce the safety of the creel Difficulty in loading and increasing the safety of the work.

Another object of the present invention is to provide a pylon mounting method capable of accurately controlling installation accuracy, shortening the docking cycle, and saving production costs.

To achieve this, the present invention employs the following technical solutions:

A creel mounting method is provided that provides a boring frame on which the creel is mounted during the staged assembly phase and then hangs together with the segment to the dock for large closure assembly.

As a preferred technical solution of the mounting method of the creel, the following steps are included:

Includes the following steps:

Step S10, the segmentation is performed;

Step S20: positioning the pylon frame: setting a pole on the ground, and drawing a height inspection line on the pole, the height inspection line including a horizontal base line of the tire frame and a center line height of the shaft hole, the yoke frame Hanging to the segment and having the shaft hole between the corresponding poles, pulling the wire according to the central line height line of the shaft hole, one end of the wire and one of the shaft holes of the boring frame The poles of the side are connected, the other end is connected to the pole on the other side through the shaft hole of the shank, and the position of the wire at the pole is adjusted to make the wire and the raft The theoretical center line of the shaft hole of the yoke is coincident, and then the position of the yoke frame is adjusted such that the center line of the shaft hole of the yoke frame is offset from the wire set distance in the horizontal and vertical directions, and then the wire hammer is used. Adjusting a front and rear position of the yoke frame in a length direction of the segment;

Step S30, the boring frame welding: welding the boring frame and the segment, and monitoring during the welding process, and re-adjusting if there is a deviation to ensure the accuracy of the welding.

As a preferred technical solution of the mounting method of the creel, the step S10 specifically includes:

Step S11, drawing, on the ground sample, the contoured contour line, the segment center line, the rib inspection line, and the benchmark position line of the segment according to the drawing;

Step S12, preparing a tire frame on the ground sample, and forming the segment on the tire frame;

Step S13: Draw a theoretical centerline of the shaft hole of the boring frame on the outer panel of the segment.

As a preferred technical solution of the mounting method of the creel, a step S21 is further disposed between the step S20 and the step S30: the locating frame is reinforced by the positioning member.

As a preferred technical solution of the mounting method of the boring frame, in step S20, after adjusting the center line of the shaft hole, the center line of the shaft hole is offset upward in the vertical direction. -2mm, then offset 0-5mm away from the side in the horizontal direction, and then use the line hammer to adjust the front and rear position of the yoke in the length direction of the segment.

As a preferred technical solution of the creel mounting method, in the step S30, the yoke frame and the segment welding are preheated before welding and are performed after welding. Insulation, wherein the preheating temperature is from 120 ° C to 150 ° C.

As a preferred technical solution of the mounting method of the boring frame, after the preheating, the yoke frame is simultaneously welded symmetrically.

As a preferred technical solution of the mounting method of the boring frame, the welding sequence of the boring frame is: firstly, the ribs on the segment that are respectively abutted with the inner and outer arms Welding between the butt joints, welding the inner and outer arms of the creel and the gussets of the segmented ribs, and then the inner arms of the yoke The arms are welded to the corner joints of the segmented outer plates, and finally the butt joints between the bulk outer plates and the other outer plates are welded.

As a preferred technical solution of the mounting method of the creel, the precision monitoring of the boring frame welding process is performed, and the center line of the shaft hole and the theoretical center line of the shaft hole of the boring frame are welded. The deviation before is ≤±1 mm, and the deviation after welding is ≤±2 mm. The deviation between the center of the front and rear end faces of the shaft hole and the position of the theoretical center before welding is ≤±2 mm, and the position deviation after welding is ≤±3 mm.

As a preferred technical solution of the mounting method of the creel, the step S30 is set. Step S40: Before the segment leaves the frame, respectively, corresponding marks are marked on the segment and the cymbal frame for subsequent loading, and the corresponding markings include: dividing the points on the ground. The segment center line is respectively led to the 艏艉 position of the segment and the front and rear end faces of the shaft hole of the yoke frame, and the rib line is led to the front and rear end faces of the shaft hole and the rib line adjacent to the pole Leading to the outer surface of the shank, guiding the center line of the shaft hole to the front and rear end faces of the hub of the yoke.

The invention has the beneficial effects that the installation of the boring frame in the stage assembly stage can reduce the installation difficulty of the boring frame; the reverse manufacturing method is used in the installation process, the height of the construction is lowered, the work at height is avoided, and the construction is increased. Safety, in the installation process of the boring frame, the construction personnel can directly construct on the section, without the need to additionally carry the construction platform. Among them, the installation steps of segmentation, truss positioning, and boring frame welding can be used to accurately control the installation of the creel and improve the installation accuracy of the creel.

DRAWINGS

The invention will now be described in further detail with reference to the drawings and embodiments.

Figure 1 is a cross-sectional view showing the mounting of the creel bracket of the embodiment on the segment.

Figure 2 is a longitudinal cross-sectional view of the creel frame of the embodiment during installation (the wire is not shown).

Fig. 3 is a schematic transverse cross-sectional view showing the boring frame of the embodiment during installation.

Fig. 4 is a schematic view showing the drawing of the ground line of the embodiment.

In the picture:

1, segment; 11, ribs; 12, outer plate; 2, truss frame; 21, inner arm; 22, outer arm; 23, shaft hole; 24, shaft hole center line; 3, tire frame level Baseline; 4, benchmark; 41, benchmark position line; 5, contour ground line; 6, segment center line; 7, rib line; 8, positioning parts; 9, ground.

Detailed ways

The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

As shown in FIGS. 1 to 4, in the present embodiment, a method for mounting a creel frame according to the present invention provides a creel 2 in which the yoke 2 is mounted at the stage of assembly. On the segment 1, and then together with the segment 1 to the dock to carry out a large collapse assembly.

The installation of the boring frame 2 in the stage assembly stage can reduce the installation difficulty of the boring frame 2, and is installed by reverse engineering during the installation process, that is, the segment 1 is flipped during the installation to keep the outer plate 12 away from the installation. On one side of the ground 9, the deck is located on the side close to the ground 9, which reduces the height of the construction and increases the safety of the construction. During the installation process of the truss 2, the construction personnel can directly construct on the section 1 without Also equipped with a construction platform. It is installed by the reverse manufacturing method, and it is convenient to adjust the installation precision of the boring frame 2 during the installation process, and reduce the workload of pulling the wire. After the boring frame 2 is installed in the section 1, the sling is hanged together with the section 1 to the dock for large-close assembly, and the darkening work of the boring boring frame 2 can be completed in the workshop, and the method can reduce the occupation of the dock. Time, shortening the dock cycle, improving the utilization of the dock, and making rational use of production resources.

Wherein, the mounting method of the boring frame 2 comprises the following steps:

Step S10, the segment 1 is made;

Step S20, positioning the boring frame 2: setting a benchmark 4 on the scale, and drawing a height inspection line on the benchmark 4, the height inspection line including the horizontal baseline 3 of the tire frame and the center height line of the shaft hole, The shank 2 is hung to the segment 1 and has its axial hole 23 located between the corresponding poles 4, and the wire is drawn according to the central line height of the shaft hole, one end of the wire and the The rod 4 of one side of the shaft hole 23 of the pylon 2 is connected, and the other end is connected to the rod 4 on the other side thereof through the shaft hole 23 of the creel 2 to adjust the wire Position on the pole 4 to make the steel wire and the shaft hole The center line is coincident, and then the position of the yoke 2 is adjusted so that the center line of the shaft hole of the yoke 2 is offset from the wire set distance in the horizontal and vertical directions, and then the yoke 2 is adjusted by the wire hammer. Front and rear positions in the length direction of the segment 1;

Step S30, the boring frame 2 is welded: the boring frame 2 is welded to the segment 1 and monitored during the welding process, and if there is a deviation, it is re-adjusted to ensure the accuracy of the welding.

Before the construction, the manufacturing accuracy of the boring frame 2 is checked and the machining allowance is confirmed, and the marks of the yoke 2 at the center of the front and rear end faces of the shaft hole 23 are inspected for subsequent scribing and welding. The height of the inspection line can be determined as the installation height of the creel 2, and the pulling wire can assist the center line 24 of the shaft hole to coincide with the theoretical center line of the shaft hole. Displaceing the wire set distance in the horizontal and vertical directions on the theoretical centerline of the shaft hole, fully taking into account the amount of welding shrinkage when the truss frame 2 and the segment 1 are welded, and providing space for welding deformation to ensure The accuracy of the actual installation of the boring frame 2 in the horizontal direction and the vertical direction is then adjusted by the wire hammer to adjust the longitudinal position of the creel 2 in the longitudinal direction of the segment 1 to achieve the length of the segment 1 Precision control. In step S30, the welding process is monitored, the welding deviation can be adjusted in time, the subsequent adjustment work is reduced, the welding accuracy is ensured, and the welding efficiency is improved.

In the present embodiment, the wire rod is pulled by a wire having a diameter of 0.6 mm. In order to effectively position the wire, a weight of 30 kg is applied to both ends of the wire to reduce the error of wire positioning.

In the implementation, by providing a wire hammer at the port position of the shaft hole 23, it is necessary to consider the machining allowance to ensure the accuracy of the positioning of the creel 2. In order to further improve the accuracy of the positioning of the creel 2, it is necessary to repeatedly measure the distance from the port position of the shaft hole 23 to the target 4 and the height of the theoretical center line of the shaft hole 23.

Specifically, the step S10 specifically includes: step S11, drawing a contour sample line 8 of the segment 1 according to the drawing, a segment 1 center line, a rib line 7 and a pole position line 41 according to the drawing. ;

Step S12, making a tire frame in the ground sample, and forming the segment 1 on the tire frame;

Step S13, the theoretical centerline of the shaft hole of the boring frame 2 is drawn on the outer panel 12 of the segment 1.

The benchmark 4 is set on the benchmark position line 41 drawn by the ground sample, and the benchmark 4 is fixed by the fixing member to ensure that the benchmark 4 is perpendicular to the horizontal plane, and the relative displacement of the benchmark 4 is ensured during the whole construction process, and is maintained well. The stability is avoided to affect the installation accuracy of the creel 2 . In this embodiment, the fixing member is a channel steel.

In the welding process, in order to prevent the yoke 2 from being displaced on the segment 1, a step S21 is further provided between the step S20 and the step S30: the truss frame 2 is reinforced by the positioning member. The yoke 2 is positioned by the positioning member to prevent the yoke 2 from being displaced during the welding process, ensuring the mounting accuracy of the yoke 2, and facilitating the welding of the yoke 2 to the segment 1.

Considering the amount of contraction of the inner arm 21 and the outer arm 22 on the pylon 2 welded to the segment 1, in order to achieve precise control of the mounting accuracy of the pylon 2, in the step S20, the 艉 is adjusted. After the shaft hole center line 24 of the yoke 2 overlaps with the wire 24, the shaft hole center line 24 is offset upward in the vertical direction by 0-2 mm, and then shifted in the horizontal direction away from the side of the ship. 0-5 mm, and then the line hammer is used to adjust the front and rear positions of the yoke 2 in the longitudinal direction of the segment 1. With this design, the mounting accuracy of the yoke 2 can be controlled such that after the boring frame 2 and the segment 1 are welded, the axis of the yoke 2 coincides with the wire 24 within the error tolerance to fit the installation. Precision requirements. In the present embodiment, the shaft hole center line 24 is offset upward by 2 mm in the vertical direction and then offset by 5 mm in the horizontal direction away from the side of the ship. Of course, in actual construction, the specific anti-deformation release amount, that is, the axial hole center line 24 is offset upward in the vertical direction by the distance of the steel wire, and the shaft hole center line 24 is offset in the horizontal direction away from the side of the ship. The distances are set according to the size of the inner arm 21 and the outer arm 22 of the boring frame 2, and are based on shipyard experience.

In the step S30, the boring frame 2 and the segment 1 are preheated before welding and are insulated after welding, wherein the preheating temperature is 120 ° C to 150 ° C. Preheated The time depends on the specific construction conditions. Preheating can slow down the cooling after welding, avoid the overflow of diffused hydrogen in the metal, improve the crack resistance of the weld, reduce the welding stress, and effectively mention the quality of the weld. Insulation after welding can make the weld shrink evenly and prevent cracking at the weld.

In order to control the deformation of the pylon frame 2 mounted on the left and right sides of the segment 1, after the preheating, the yoke frame 2 is simultaneously symmetrically welded to the left and right. Simultaneously welding the two trusses 2 to the left and right symmetry, which can simultaneously control the shape variables on the left and right sides of the split body, so that the left and right sides of the split body can be kept consistent, avoiding the difference of the order of welding on the left and right sides, so that the stern frame 2 is There is a difference between the left and right sides of the segment 1 which affects the balance of the segment 1 and improves the performance of the creel 2 .

Preferably, the inner arm 21 and the outer arm 22 are welded to the segment 1 in a fully through-welded manner. The use of full penetration welding avoids the occurrence of welds at the welds, satisfies the strength requirements of the boring frame 2 during use, and prolongs its service life.

Wherein, the welding sequence of the creel 2 is: first, the butt joint between the ribs 11 on the segment 1 and the abutting ribs 11 of the inner arm 21 and the outer arm 22, respectively, The inner arm 21 and the outer arm 22 of the yoke 2 are welded to the gusset 11 between the ribs 11 of the segment 1, and then the inner arm 21 and the outer arm 22 of the yoke 2 are The corner joints of the outer panel 12 of the segment 1 are welded, and finally the butt joint between the bulk outer panel and the other outer panels is welded. In the process of making the segment, in order to facilitate the installation of the yoke 2, the welding position of the yoke 2 is reserved on the segment 1. Specifically, the rib 11 which is not installed at the abutting position of the boring frame 2 of the segment 1 is welded to the rib 11 which is not welded to the segment 1 during the welding of the yoke 2 The inner arm 21 and the outer arm 22 are welded to the rib 11 while ensuring good welding between the ribs 1 which are in contact with the inner arm 21 and the outer arm 22. The installation port is reserved at the position where the stern frame 1 is docked on the segment 1 to reserve space for the welding construction, which can reduce the welding difficulty and facilitate the welding of the yoke frame 2. At the same time, the damage to the outer panel 12 outside the welded area can be minimized, and the adjustment of the outer panel 12 during the convenient welding process is also facilitated.

In order to ensure the installation accuracy of the boring frame 2, the precision of the welding process of the boring frame 2 is monitored, so that the deviation between the center line 24 of the shaft hole and the theoretical center line of the shaft hole before welding is ≤±1 mm, after welding The deviation is ≤±2 mm, and the position of the front and rear end faces of the shaft hole 23 and the position of the theoretical center is ≤±2 mm before welding, and the positional deviation after welding is ≤±3 mm.

In order to cooperate with the assembly process of lifting the segment 1 into the dock after the installation of the boring frame 2 is completed, the step S30 is followed by the step S40: the segment 1 is separated from the frame before the segment 1 Corresponding markings are made on the yoke 2 for subsequent loading. The corresponding markings include: the centerline of the segment 1 on the ground to the 艏艉 position of the segment 1 and the pylon 2 On the front and rear end faces of the shaft hole 23, the rib line is led to the front and rear end faces of the shaft hole 23 and the rib line near the pole 4 is led to the outer surface of the boring frame 2, and the shaft hole center line 24 is It is led to the front and rear end faces of the shaft hole 23 of the creel. In the process of assembly, the marks on each segment 1 are correspondingly closed, which reduces the workload of the large-close assembly and improves the production efficiency of the ship.

The economic benefit brought by the installation method of the boring frame of the invention:

1. The installation of the boring frame is changed from the docking operation to the segmentation stage, and the aerial work is transferred to the ground, which not only saves the cost of the detaching frame, but also saves the construction of the scaffolding of the dock, and calculates the space area according to the length of 16m×4m×12m. , can save labor costs of about 61,440 yuan.

2. Reduce the temporary lifting code of the outer plate and the stern frame by about 36, which reduces the corresponding high-altitude car fitting, lifting code assembly welding, flaw detection, dismantling, grinding, repairing, boring frame inspection operation process, saving labor costs It is about (40+60)×36×(1.5+2+0.5+1+2+1.5+0.5)=32400 yuan.

3, using the traditional installation method 艉艉定位定位定位定位定位定位定位定位定位定位定位定位定位定位定位定位定位定位定位定位定位定位定位定位定位定位定位定位定位定位定位定位定位定位定位定位定位定位定位定位定位定位定位定位= 9,000 yuan.

4, according to the truss frame installed in the segmentation stage, 10 people spend 6 days to complete, according to the working hours segment and the ship In the 1:6 calculation of the dock, the use of the above-mentioned boring frame mounting method saves labor costs by about 10×300×6×6=108,000 yuan compared with the conventional installation method.

5. Shorten the construction of the dock (underwater engineering) for at least 10 days.

In the description herein, it is to be understood that the terms "first" and "second" are used only to distinguish between the description and have no special meaning.

It is to be understood that the above-described embodiments are merely preferred embodiments of the invention and the technical principles of the invention, and any changes or substitutions that are readily apparent to those skilled in the art are within the scope of the presently disclosed technology. All should be covered by the scope of the present invention.

Claims

A boring frame mounting method, characterized in that a truss frame is provided, and the boring frame is mounted on the segment in a stage assembling stage, and then hanged together with the segment to the dock for large closing assembly.
The creel mounting method according to claim 1, comprising the steps of:

Step S10, the segmentation is performed;

Step S20: positioning the pylon frame: setting a pole on the ground, and drawing a height inspection line on the pole, the height inspection line including a horizontal base line of the tire frame and a center line height of the shaft hole, the yoke frame Hanging to the segment and having the shaft hole between the corresponding poles, pulling the wire according to the central line height line of the shaft hole, one end of the wire and one of the shaft holes of the boring frame The poles of the side are connected, the other end is connected to the pole on the other side through the shaft hole of the shank, and the position of the wire at the pole is adjusted to make the wire and the raft The theoretical center line of the shaft hole of the yoke is coincident, and then the position of the yoke frame is adjusted such that the center line of the shaft hole of the yoke frame is offset from the wire set distance in the horizontal and vertical directions, and then the wire hammer is used. Adjusting a front and rear position of the yoke frame in a length direction of the segment;

Step S30, the boring frame welding: welding the boring frame and the segment, and monitoring during the welding process, and re-adjusting if there is a deviation to ensure the accuracy of the welding.
The boring frame mounting method according to claim 2, wherein the step S10 specifically comprises:

Step S11, drawing, on the ground sample, the contoured contour line, the segment center line, the rib inspection line, and the benchmark position line of the segment according to the drawing;

Step S12, preparing a tire frame on the ground sample, and forming the segment on the tire frame;

Step S13: Draw a theoretical centerline of the shaft hole of the boring frame on the outer panel of the segment.
The boring frame mounting method according to claim 2, wherein a step S21 is further provided between the step S20 and the step S30: the locating frame is reinforced by the positioning member.
The creel mounting method according to claim 2, wherein in the step S20 Medium: after adjusting the center line of the shaft hole, the center line of the shaft hole is offset upward in the vertical direction by 0-2 mm, and then offset from the side of the ship by 0-5 mm in the horizontal direction, and then the line is used. The hammer adjusts the front and rear positions of the creel in the longitudinal direction of the segment.
The creel mounting method according to claim 2, wherein in the step S30, the yoke frame and the segment welding are preheated before welding and are performed after welding Insulation, wherein the preheating temperature is from 120 ° C to 150 ° C.
The creel mounting method according to claim 6, wherein after the preheating, the creel is simultaneously welded symmetrically.
The pylon mounting method according to claim 7, wherein the yoke is welded in the order of ribs on the segments that are respectively abutted with the inner and outer arms. Welding between the butt joints, welding the inner and outer arms of the creel and the gussets of the segmented ribs, and then the inner arms of the yoke The arms are welded to the corner joints of the segmented outer plates, and finally the butt joints between the bulk outer plates and the other outer plates are welded.
The pylon mounting method according to claim 8, wherein the precision monitoring of the boring frame welding process is performed such that the center line of the shaft hole and the theoretical center line of the shaft hole of the boring frame are welded The deviation before is ≤±1 mm, and the deviation after welding is ≤±2 mm. The deviation between the center of the front and rear end faces of the shaft hole and the position of the theoretical center before welding is ≤±2 mm, and the position deviation after welding is ≤±3 mm.
The creel mounting method according to claim 3, wherein the step S30 is followed by a step S40: the segments are respectively made on the segment and the boring frame before leaving the frame Corresponding markings for subsequent loading, the corresponding markings include: guiding the segment centerline on the ground to the 艏艉 position of the segment and the front and rear end faces of the yoke Leading the rib inspection line to the front and rear end faces of the shaft hole and guiding the rib line near the pole to the outer surface of the boring frame, and guiding the center line of the shaft hole to the hub of the boring frame On the front and rear end faces.