Plate seam dividing method for shaft wrapping sleeve outer plate

Abstract

The embodiment of the invention provides a plate seam division method for a shaft sheath outer plate, and the method comprises the steps: S1, determining an edge seam, and carrying out the outward deviation of a first distance D1 along a rotating circle line at the outermost side of the shaft sheath outer plate, so as to obtain the edge seam of the shaft sheath outer plate; s2, determining a first slab seam, wherein the first slab seam is arranged on the outer side of the transverse partition plate in the direction of the cross section of the shaft sheath; and S3, a second plate seam is determined, wherein the second plate seam is located at the position of the rotating circle line on the inner side of the shaft wrapping sleeve outer plate. According to the embodiment of the invention, the operation is simple, the shaft sheath outer plate is divided into a plurality of parts with smaller linetypes through reasonable plate seam division, the processing difficulty of the shaft sheath outer plate is reduced, the processing production of the outer plate is facilitated, the welding position is transferred to the outer side of the shaft sheath outer plate, and the problem that the welding quality is poor after the shaft sheath outer plate is sealed back is effectively solved. And the shaft sheath outer plate and the inner side diaphragm plate cannot be welded.

Description

Technical Field

[0001] The present invention relates to the technical field of ship outfitting, and particularly to a method for dividing the plate seams of the outer plate of the shaft sleeve. Background Art

[0002] When the main engine shaft passes through the ship's outer plate, a shaft sleeve structure needs to be set on the ship's outer plate to facilitate the installation of the shafting and ensure the watertightness of the outer plate. The shaft sleeve has a complex line type, and the part processing is relatively difficult. At the same time, after the main engine shaft is installed, due to the small gap between the shaft sleeve and the transverse bulkhead, there is a situation where welding construction cannot be carried out between the shaft sleeve structure and the inner transverse bulkhead. Therefore, there is an urgent need for a method for dividing the plate seams of the outer plate of the shaft sleeve to reasonably divide the plate seams of the outer plate of the shaft sleeve, facilitate the processing of the outer plate parts, and solve the problem that welding construction cannot be carried out between the shaft sleeve structure and the inner transverse bulkhead after the shafting is installed. Summary of the Invention

[0003] In view of the above problems existing in the prior art, an embodiment of the present invention provides a method for dividing the plate seams of the outer plate of the shaft sleeve to solve the technical problems of difficult part processing and inability to weld the shaft sleeve structure and the inner transverse bulkhead in the prior art.

[0004] An embodiment of the present invention provides a method for dividing the plate seams of the outer plate of the shaft sleeve, including the following steps:

[0005] Step S1, determining the edge seam, and offsetting a first distance D1 outward along the outermost turning circle line of the outer plate of the shaft sleeve to obtain the edge seam of the outer plate of the shaft sleeve;

[0006] Step S2, determining the first plate seam, and arranging the first plate seam outside the transverse bulkhead along the cross-sectional direction of the shaft sleeve;

[0007] Step S3, determining the second plate seam, and locating the second plate seam at the position of the turning circle line inside the outer plate of the shaft sleeve.

[0008] In one embodiment, it further includes

[0009] Step S4, determining the third plate seam, arranging the third plate seam along the axis direction of the shaft sleeve, and dividing the plate with a central angle greater than 180° into two parts.

[0010] In one embodiment, the value of D1 ranges between 90 - 110 mm.

[0011] In one embodiment, during the cutting stage of the outer plate of the shaft sleeve, a margin of a second distance D2 needs to be extended at the position of the edge seam.

[0012] In one embodiment, the value of D2 ranges between 70 - 90 mm.

[0013] In one embodiment, a single V-groove weld seam with a gap is formed at the outer side surface of the outer plate of the shaft sleeve for the first plate seam.

[0014] In one embodiment, double V-groove weld seams without gaps are formed at the edge seam, the second plate seam and the third plate seam.

[0015] Compared with the prior art, the beneficial effects of a method for dividing the plate seams of the outer plate of a shaft sleeve provided by an embodiment of the present invention are as follows:

[0016] 1. The operation of the embodiment of the present invention is simple. By reasonably dividing the plate seams, the outer plate of the shaft sleeve is divided into multiple parts with smaller linear dimensions, reducing the processing difficulty of the outer plate of the shaft sleeve and facilitating the processing and production of the outer plate.

[0017] 2. In the embodiment of the present invention, a single V-groove weld seam with a gap is arranged outside the transverse diaphragm, and the welding position is transferred to the outside of the outer plate of the shaft sleeve, effectively solving the problem that the outer plate of the shaft sleeve and the inner transverse diaphragm cannot be welded after the outer plate of the shaft sleeve is sealed back.

[0018] 3. Through reasonable plate seam division, the parts of the outer plate of the shaft sleeve in the embodiment of the present invention are convenient for nesting, improving the utilization rate of steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a developed view of the outer plate of the shaft sleeve and the outer plate in the vicinity thereof related to a method for dividing the plate seams of the outer plate of a shaft sleeve provided by an embodiment of the present invention;

[0020] Figure 2 is Figure 1 a schematic structural diagram of a cross-section at the FR17 position in

[0021] Figure 3 is Figure 1 a schematic structural diagram of a cross-section at the FR19 position in

[0022] Figure 4 is a schematic diagram of the plate seam division of the outer plate of a shaft sleeve related to a method for dividing the plate seams of the outer plate of a shaft sleeve provided by an embodiment of the present invention;

[0023] Figure 5 is a schematic diagram of the plate seam division related to Embodiment 1 of the present invention;

[0024] Figure 6 is a schematic diagram of a welding joint at the first plate seam.

[0025] Reference numerals:

[0026] 1. Outer plate of shaft sleeve; 2. Rotary circle line; 3. Edge seam; 4. First plate seam; 401. Plate seam one; 402. Plate seam two; 403. Plate seam three; 5. Second plate seam; 501. Plate seam four; 502. Plate seam five; 6. Third plate seam; 601. Plate seam six; 7. Steel backing; 8. Diaphragm plate. Specific embodiments

[0027] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Reference is made herein to the various solutions and features of the present application with reference to the accompanying drawings.

[0029] These and other features of the present application will become apparent from the following description of the preferred forms of the embodiments given as non - limiting examples with reference to the accompanying drawings.

[0030] It should also be understood that although the present application has been described with reference to some specific examples, those skilled in the art can surely implement many other equivalent forms of the present application, which have the features as described in the claims and thus are all within the scope of protection defined hereby.

[0031] When combined with the accompanying drawings, the above - mentioned and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description.

[0032] Hereinafter, specific embodiments of the present application will be described with reference to the accompanying drawings; however, it should be understood that the embodiments claimed are only examples of the present application, which can be implemented in various ways. Well - known and / or repetitive functions and structures are not described in detail to clarify the true intention based on the user's historical operations and to avoid unnecessary or redundant details from obscuring the present application. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but are merely used as a basis for the claims and a representative basis for teaching those skilled in the art to use the present application in substantially any suitable detailed structure in a variety of ways.

[0033] This specification may use the phrase "in one embodiment", "in another embodiment", "in yet another embodiment" or "in other embodiments", which may each refer to one or more of the same or different embodiments according to the present application.

[0034] The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention. The following combination of Figures 1-6 , will be used to further elaborate on the preferred embodiments of the present invention:

[0035] As Figures 1-5As shown in the figure, an embodiment of the present invention provides a method for dividing the plate seams of the outer plate of the shaft sleeve, including the following steps:

[0036] Step S1: Determine the edge seam 3. Offset the outermost turning line 2 of the outer plate 1 of the shaft sleeve outward by a first distance D1 to obtain the edge seam 3 of the outer plate 1 of the shaft sleeve. By moving the edge seam 3 outside the outermost turning line 2, it is possible to avoid opening and welding the weld seam at the position of the turning line 2 with changing line shape. Correspondingly, after the edge seam 3 is moved outward, the weld seam of the edge seam 3 is converted into a weld seam between flat plates, reducing the welding difficulty, effectively ensuring the welding quality, and improving the welding efficiency;

[0037] Step S2: Determine the first plate seam 4. The first plate seam 4 is arranged outside the diaphragm 8 along the cross-sectional direction of the shaft sleeve. By opening the first plate seam 4 outside the diaphragm 8, working conditions for welding on the outside are provided;

[0038] Step S3: Determine the second plate seam 5. The second plate seam 5 is located at the position of the turning line 2 inside the outer plate 1 of the shaft sleeve. By setting the plate seam at the turning line 2, the parts with different curvatures are divided into different plate parts, thereby reducing the difficulty of rolling;

[0039] It is considered that after being divided by the edge seam 3, the first plate seam 4, and the second plate seam 5, although the curvature of each plate will not change between positive and negative, due to the plate shape problem of some plates, the central angle corresponding to a single plate may be greater than 180°. At this time, in order to reduce the difficulty during the manufacturing and installation stages of such plates, in one embodiment, the plate seam dividing method further includes

[0040] Step S4: Determine the third plate seam 6. The third plate seam 6 is arranged along the axis direction of the shaft sleeve, and the third plate seam 6 divides the plate with a central angle greater than 180° into two parts. When determining the third plate seam 6, the internal longitudinal diaphragm and other structures need to be comprehensively considered. Try to avoid the internal structures while ensuring uniform division of the plates to reduce the welding difficulty;

[0041] Among them, in one embodiment, the value of D1 ranges between 90 - 110 mm, which will neither make the extension length too small nor too large, thereby reducing the bending difficulty of the edge of the plate;

[0042] Of course, considering that errors are inevitable during the installation of the plate, in order to improve the tolerance ability, in one embodiment, a second distance D2 of allowance needs to be extended at the position of the edge seam 3 during the cutting stage of the outer plate 1 of the shaft sleeve, and the value of D2 ranges between 70 - 90 mm;

[0043] Since the space at the first plate seam 4 is narrow and the outer plate 1 of the shaft sleeve does not have the condition of double-sided welding, in order to achieve reliable welding on the outside of the outer plate 1 of the shaft sleeve, such as Figure 6As shown in the figure, a single V-groove weld with a gap is opened at the outer side of the outer plate 1 of the shaft sleeve for the first plate seam 4, and a steel backing 7 is inserted into the gap between the outer plate 1 of the shaft sleeve at the position of the first plate seam 4 and the edge of the diaphragm plate 8. The steel backing 7 is welded and fixed to the diaphragm plate 8 before the installation of the outer plate, so as to ensure that during the welding stage of the outer plate, the outer plates on both sides of the first plate seam 4 can be reliably welded and fixed between the outer plates and between the outer plate and the steel backing 7;

[0044] From the perspective of ensuring the welding quality, double V-groove welds without gaps are opened at the edge seam 3, the second plate seam 5 and the third plate seam 6, and then reliable welding between the outer plate sections of the outer plate 1 of the shaft sleeve is achieved by welding on both sides at the corresponding plate seams.

[0045] Embodiment 1

[0046] As Figure 5 shown, refer to the following application examples:

[0047] The embodiment of the present invention relates to a method for dividing the plate seams of the outer plate of a shaft sleeve. The specific implementation details are as follows.

[0048] 1. Set an outer plate seam as the edge seam 3 at a position 100 mm outward from the outermost turning circle line 2 of the outer plate 1 of the shaft sleeve.

[0049] 2. At the FRR20 position, set a transverse plate seam, and both ends of the plate seam end at the edge seam 3, as shown by the plate seam 401 in Figure 5 the figure.

[0050] 3. At the FR19 position, set a transverse plate seam, and both ends of the plate seam end at the edge seam 3, as shown by the plate seam 402 in Figure 5 the figure.

[0051] 4. At the FR17, FR19 and FR20 positions, set a longitudinal outer plate seam at a distance of 161 mm, 202 mm, 95 mm from the edge seam 3 respectively, and both ends of the plate seam end at FR17 and the seam 401, as shown by the plate seam 501 in Figure 5 the figure.

[0052] 5. According to the operation in step 4, set the longitudinal plate seams axially symmetrically, as shown by the plate seam 502 in Figure 5 the figure.

[0053] 6. At the FR18 position, set a transverse plate seam, and both ends of the plate seam end at the plate seam 501 and the plate seam 502, as shown by the plate seam 403 in Figure 5 the figure.

[0054] 7. Set outer plate seams at positions FR17 and FR18, 360 mm and 392 mm respectively from the plate joint 501. The two ends of the seam extend to FR17 and seam 403, as shown in Figure 5 seam 601;

[0055] 8. Set steel backing strips at seams 2, 3, and 6. The steel backing strips are welded to the inner structure of the shaft sleeve, as shown in Figure 2 sequence number ○8;

[0056] 9. Set a single-sided groove with an angle of 20° at seam 401, seam 402, and seam 403. The groove faces the outside of the shaft sleeve outer plate 1, as shown in Figure 6 When the outer plate is sealed back, welding construction can be carried out on the outside of the shaft sleeve outer plate 1, and the outer plate and the steel backing strip 7 are directly welded;

[0057] 10. Set a margin of 80 mm at edge seam 3 for adjusting the installation tolerance of the outer plate parts;

[0058] 11. Define the flow direction of each plate part of the shaft sleeve outer plate 1 as being sealed back after the shafting installation. After the construction of the shafting and the inner structure of the shaft sleeve outer plate 1 is completed, the loose outer plate parts are sealed back.

[0059] In the embodiment of the present invention, by reasonably dividing the seams of the shaft sleeve outer plate 1, the outer plate parts are convenient for processing. At the same time, in cooperation with the corresponding groove design of the shaft sleeve outer plate 1 parts, the problem that the shaft sleeve structure cannot be welded and constructed after the shafting installation is solved. Moreover, the method steps are simple, the implementation difficulty is small, the operation is convenient, and it is convenient for construction and installation.

[0060] The above embodiments are only exemplary embodiments of the present invention and are not used to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements within the essence and protection scope of the present invention, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present invention.

Claims

1. A method for dividing the plate seam of the shaft sleeve outer plate, characterized in that: The steps include: Step S1, determining the edge seam (3), shifting the outermost turning circle line (2) of the shaft sleeve outer plate (1) outward by a first distance D1 to obtain the edge seam (3) of the shaft sleeve outer plate (1); Step S2, determining a first plate seam (4), wherein the first plate seam (4) is arranged on the outer side of the diaphragm (8) along the cross-sectional direction of the shaft sleeve; Step S3, determining a second plate seam (5), wherein the second plate seam (5) is located at the position of the turning line (2) on the inner side of the shaft sleeve outer plate (1).

2. A method for dividing the plate seam of the shaft sleeve outer plate according to claim 1, characterized in that: Also includes, Step S4, determining a third plate seam (6), wherein the third plate seam (6) is arranged along the axial direction of the shaft sleeve, and the third plate seam (6) divides the plate with a central angle greater than 180° into two parts.

3. The method for dividing the plate seam of the shaft sleeve outer plate according to claim 1, characterized in that: The value of D1 is between 90-110 mm.

4. The method for dividing the plate seam of the shaft sleeve outer plate according to claim 1, characterized in that: During the cutting stage of the shaft sleeve outer plate (1), a margin of a second distance D2 needs to be extended outward at the edge seam (3).

5. A method for dividing the plate seam of the shaft sleeve outer plate according to claim 4, characterized in that: The value of D2 is between 70-90 mm.

6. The method for dividing the plate seam of the shaft sleeve outer plate according to claim 1, characterized in that: The first plate seam (4) is provided with a single V-shaped groove weld with a gap on the outer side surface of the shaft sleeve outer plate (1).

7. The method for dividing the plate seam of the shaft sleeve outer plate according to claim 2, characterized in that: Double V-shaped groove welds without gaps are provided at the edge seam (3), the second plate seam (5) and the third plate seam (6).

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