Flat mounting pulley base and design method thereof

Abstract

The invention discloses a horizontally-mounted pulley base. The horizontally-mounted pulley base comprises a base panel, a connecting assembly and a blocking strip. The base panel is horizontally arranged below a deck of a ship, and the upper portion of the base panel is fixedly connected with the deck through connecting assemblies distributed in the transverse direction and the longitudinal direction. A blocking strip is fixed on the lower surface of the base panel; a pulley bottom plate of the horizontally-mounted pulley is detachably connected to the base panel, and the side portion of the pulley bottom plate is attached to the inner side face of the blocking strip; the horizontally-mounted pulley is in transmission connection with the steel wire rope. The invention further discloses a design method of the flush pulley base. The flat pulley has the beneficial effects that the blocking strips are installed on the edge of the base panel, when the flat pulley works, the in-plane load borne by the pulley bottom plate is transmitted to the blocking blocks through the binding faces, the shear load borne by the installation bolts is effectively shared, the shear force of the installation bolts is greatly reduced, and the service life of the flat pulley is prolonged. The problem that in the prior art, a mounting bolt loses efficacy due to independently bearing shearing force is solved.

Description

Technical Field

[0001] This invention relates to the field of ship structural design technology, specifically to a flat-mounted pulley base and its design method. Background Technology

[0002] To improve their operational efficiency, ships need to be equipped with various large machines, such as gantry cranes for lifting cargo on bulk carriers and elevators on large passenger ships. These machines all rely on drive units to apply traction force via steel cables, causing them to move along fixed tracks. However, due to space limitations on board and the inherent structure of the drive units, the traction force output from the drive unit's installation location is not collinear with the mechanical movement track. Therefore, pulleys are needed to change the direction of the traction force, making them coincide. Flat-mounted pulleys are typical traction force direction conversion components in this type of application.

[0003] The flat-mounted pulley is fixed to the hull structure via a special base. One end of the base is connected to the pulley device, and the other end is welded to the hull structure. The pulley base must not only have sufficient strength to secure the pulley and provide support reaction force for the pulley in its working state, but also meet the requirements for easy installation, maintenance, and replacement of the pulley.

[0004] While the weight of a flat-mounted pulley is relatively small and can be ignored in the base design, it bears a large working load, which is transmitted to the base through the shear force of the bolts. Since the shear area of ​​the bolt is very small, and the shear strength of the bolt material is only 1 / √3 of its tensile strength, the bolt becomes a weak component in this type of base. Therefore, improving the shear resistance of the bolt or reducing its shear force is a key design consideration for this type of base.

[0005] However, the existing design of flat-mounted pulley bases does not fully consider the shear force on the bolts, which makes the bolts prone to failure during actual service due to shear stress exceeding their bearing limit. This results in damage to the overall bearing capacity of the base and makes it difficult to ensure the normal operation of the pulley equipment. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing a flat-mounted pulley base and its design method, aiming to solve the problem of mounting bolts failing due to excessive shear force in existing technologies.

[0007] The technical solution adopted in this invention is: a flat pulley base, including a base panel, a connecting component, and a blocking strip;

[0008] The base panel is horizontally positioned below the deck of the ship, and the upper part of the base panel is fixedly connected to the deck via connecting components distributed along the transverse and longitudinal directions.

[0009] The lower surface of the base panel is fixed with a blocking strip;

[0010] The pulley bottom plate of the flat pulley is detachably connected to the base panel, and the side of the pulley bottom plate is attached to the inner side of the blocking strip; the flat pulley is in transmission connection with the steel wire rope.

[0011] According to the above scheme, the connecting assembly includes elbow plates and web plates arranged longitudinally and transversely; the elbow plates are spaced along the longitudinal direction of the base panel; the bottom of the elbow plate is connected to the base panel, and the top of the elbow plate is connected to the deck; the web plates are spaced along the transverse direction of the base panel; the bottom of the web plate is connected to the base panel, and the top of the web plate is connected to the deck; the elbow plates and the web plates are arranged vertically and staggered.

[0012] According to the above scheme, the two side ends of the elbow plate and the web plate extend outward and are connected to the ship skeleton.

[0013] According to the above scheme, when the two side ends of the elbow plate or the web plate have no ship skeleton to be connected, a short cross beam is arranged for the elbow plate or the web plate; the short cross beam is connected to the two side ends of the elbow plate and the web plate, and the top of the short cross beam is fixedly connected to the deck.

[0014] According to the above scheme, process holes are formed in the base panel.

[0015] According to the above scheme, the blocking strip is a long strip-shaped flat steel, and the blocking strip is welded on the base panel through broken seam welding on both sides.

[0016] According to the above scheme, the base panel and the pulley bottom plate are both designed in a rectangular structure, and one blocking strip is arranged corresponding to one long side and one adjacent short side of the base panel.

[0017] According to the above scheme, the elbow plate and the base panel, the elbow plate and the deck of the ship, the web plate and the base panel, the web plate and the deck of the ship, and the web plate and the elbow plate are all fixed by welding.

[0018] According to the above scheme, the distance between adjacent web plates and the distance between adjacent elbow plates are both greater than 200mm.

[0019] The application also adopts a design method of the flat pulley base as described above, and the method is as follows:

[0020] S1, according to the size of the flat pulley installation surface, determine the size of the base panel, including the length, width and height from the deck of the ship of the base panel;

[0021] The length of the flat installation pulley mounting surface is a, and the width is b, so the length L of the base panel is a+y1+y2+m, and the width W is b+y1+y2+m; wherein y1 is the reserved width margin of the free edge of the base panel, and the value range is 5mm<=y1<=10mm; y2 is the reserved welding width of one side of the welding blocking strip, and the value range is 10mm<=y2<=15mm; and m is the width of the blocking strip, and the value range is 10mm<=m<=20mm;

[0022] The height h of the base panel from the deck of the ship is greater than or equal to 350mm; and the thickness t1 of the base panel is selected according to the actual working load of the steel wire rope;

[0023] S2, a blocking strip is designed; the width of the blocking strip is m, and the height is n, and 15mm<=n<=30mm; the distance between the blocking strip and the edge of the base panel is equal to the reserved welding width y2, and 10mm<=y2<=15mm;

[0024] S3, a web plate and an elbow plate are arranged; the distance p1 between adjacent web plates is in the range of 200mm<=p1<=s, and s is the deck longitudinal rib spacing; the distance p2 between adjacent elbow plates is in the range of 200mm<=p2<=s; the distance p3 between the web plate and the edge of the base panel and the distance p4 between the elbow plate and the edge of the base panel both need to satisfy p3<=200mm and p4<=200mm;

[0025] The thickness t2 of the web plate and the elbow plate is determined according to the working load of the steel wire rope.

[0026] S4, a short cross beam is arranged, and the base panel is designed with an opening; the specification of the short cross beam is the same as that of the nearby deck longitudinal rib, and the distance k between the short cross beam and the edge of the base panel is in the range of 50mm<=k<=150mm;

[0027] The units of all parameters are mm.

[0028] The beneficial effects of the present application are:

[0029] 1. The blocking strip is installed at the edge of the base panel, the blocking strip is attached to the edge of the pulley bottom plate, when the flat installation pulley works, the in-plane load borne by the pulley bottom plate is transmitted to the blocking block through the attached surface, effectively sharing the shear load borne by the mounting bolt, greatly reducing the shear force of the mounting bolt, avoiding the problem that the mounting bolt fails due to bearing the shear force alone in the prior art, improving the performance of the flat installation pulley base, and ensuring the normal operation of the pulley equipment.

[0030] 2. The elbow plate and the web plate are arranged in a longitudinal and transverse interlaced manner to form a cross-shaped three-dimensional support system, which can efficiently transmit the pulley working load to the ship main structure (longitudinal rib, cross beam), reduce stress concentration, and improve the strength of the whole device.

[0031] 3. The application opens process holes on the base panel, provides sufficient operation space for double-sided welding of the web plate, knee plate and ship deck, ensures the welding quality, and the process holes also serve as lightening holes, effectively reduce the overall weight of the base under the premise of not weakening the core bearing strength of the base, and reduce material consumption. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is the overall top view of the embodiment one (without showing the ship deck).

[0033] Figure 2 is the A-A sectional view of Figure 1 (showing the ship deck).

[0034] Figure 3 is the B-B sectional view of Figure 1 (showing the ship deck).

[0035] Figure 4 is the C-C sectional view of Figure 1 (showing the ship deck).

[0036] Figure 5 is the plane view of the installation of the flat pulley of the embodiment one.

[0037] Figure 6 is the D-D sectional view of Figure 5 .

[0038] In the figure, 1 is the base panel, 2 is the knee plate, 3 is the web plate, 4 is the short cross beam, 5 is the blocking strip, 6 is the flat pulley, 7 is the steel wire rope, 8 is the installation bolt, 9 is the pulley bottom plate, 10 is the deck, 11 is the process hole. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below in combination with the drawings in the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0040] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0041] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0042] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0043] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction. In addition, the term "a plurality of" means two or more.

[0044] As Figures 1 to 4The utility model provides a kind of flat pulley base, specifically a kind of flat pulley base for ship, including base panel 1, connecting component and blocking strip 5;

[0045] The base panel 1 is horizontally arranged below the deck 10 of the ship, and the upper part of the base panel 1 is fixedly connected with the deck 10 through the connecting component distributed in the transverse and longitudinal directions;

[0046] The lower surface of the base panel 1 is fixed with the blocking strip 5;

[0047] As shown in Figure 5 And Figure 6 The pulley bottom plate 9 of the flat pulley 6 is detachably connected to the base panel 1, preferably connected through mounting bolt 8, and the side of the pulley bottom plate 9 is in close contact with the inner side (the force receiving surface) of the blocking strip 5; the flat pulley 6 is drivingly connected with the steel wire rope 7, the blocking strip 5 is located at the edge of the flat pulley 6, and the axis direction of the blocking strip 5 is perpendicular to the direction of the pulling force (or the transverse component force) of the steel wire rope 7 applied to the flat pulley 6, so as to effectively constrain the pulley bottom plate 9 laterally.

[0048] In the utility model, the blocking strip 5 is a long strip-shaped flat steel, both surfaces of the blocking strip 5 are opened and broken and welded on the base panel 1, and after welding, one side of the pulley bottom plate 9 is polished smooth to ensure that the pulley bottom plate 9 is in close contact with the blocking strip 5. The welding mode of the base panel 1 and the blocking strip 5 ensures that the connection strength meets the load transmission requirement.

[0049] In the utility model, the base panel 1 and the pulley bottom plate 9 both adopt rectangular structure, and one blocking strip 5 is correspondingly arranged along one long side of the base panel 1 and one short side adjacent thereto; the inner sides of the two blocking strips 5 are in close contact with two adjacent side portions of the pulley bottom plate 9 respectively, and the pulley bottom plate 9 is limited and fixed through bidirectional lateral constraint, so as to ensure that when the flat pulley 6 bears multidirectional pulling force, the blocking strip 5 can effectively share the load and further reduce the bolt shear force.

[0050] Preferably, the connecting component includes elbow plates 2 and web plates 3 arranged in the longitudinal and transverse directions;

[0051] The elbow plates 2 are multiple, and are spaced apart in the longitudinal direction of the base panel 1;

[0052] The bottom of the elbow plate 2 is connected with the base panel 1, and the top of the elbow plate 2 is connected with the deck 10;

[0053] The web plates 3 are multiple, and are spaced apart in the transverse direction of the base panel 1;

[0054] The bottom of the web plate 3 is connected with the base panel 1, and the top of the web plate 3 is connected with the deck 10;

[0055] The elbow plates 2 and the web plates 3 are perpendicularly staggered.

[0056] In the present application, the elbow plate 2 and the base panel 1, the elbow plate 2 and the deck 10, the web plate 3 and the base panel 1, the web plate 3 and the deck 10, the web plate 3 and the elbow plate 2 are preferably fixed by welding; the elbow plate 2 and the web plate 3 are vertically staggered to form a grid-shaped three-dimensional support system, which can simultaneously improve the shear strength, bending stiffness and overall stability of the connecting assembly in the longitudinal and transverse directions.

[0057] Preferably, the two side ends of the elbow plate 2 and the web plate 3 extend outward and are connected to the hull skeleton, preferably by welding, to improve the overall load-carrying capacity with the help of the hull skeleton.

[0058] Preferably, when the two side ends of the elbow plate 2 or the web plate 3 have no hull skeleton to connect, a short beam 4 is provided for the connection of the elbow plate 2 or the web plate 3. Specifically, the short beam 4 is generally a marine bulb flat steel, which is connected (preferably welded) to the two side ends of the elbow plate 2 and the web plate 3, and the top of the short beam 4 is fixedly connected to the deck 10.

[0059] Preferably, the base panel 1 is provided with a process hole 11.

[0060] In the present application, the elbow plate 2 and the web plate 3 are longitudinally and transversely staggered to form a cross-shaped grid. Due to the space constraints of the cross-shaped grid structure, there is a welding operation blind area at the connection between the elbow plate 2, the web plate 3 and the base panel 1. The process hole 11 provided on the base panel 1 can provide sufficient double-sided welding operation space to ensure the welding quality; the process hole 11 also serves as a lightening hole to reduce the weight of the base panel 1 and save materials.

[0061] Example one

[0062] This embodiment relates to a flat-packed pulley base, which, in addition to the above structure, also includes the following design:

[0063] The base panel 1 is provided with elbow plates 2 and web plates 3 in the longitudinal and transverse directions (the transverse direction is the length direction of the base panel 1, and the longitudinal direction is the width direction of the base panel 1). The web plates 3 in the length direction of the base panel 1 are continuous, and the elbow plates 2 in the width direction of the base panel 1 are intermittent on the web plates 3. Multiple web plates 3 or elbow plates 2 are provided. The distance between adjacent web plates 3 and the distance between adjacent elbow plates 2 are generally greater than 200 mm and less than the deck longitudinal rib spacing. The web plates 3 or the elbow plates 2 are aligned with the deck longitudinal ribs or beams on the hull as much as possible, and the end portions are connected to the hull skeleton. If the two end portions of the web plate 3 or the elbow plate 2 have no hull skeleton to connect, a short beam 4 can be provided to fix the end portions of the web plate 3 or the elbow plate 2.

[0064] Example two

[0065] A design method of a flat-packed pulley base, the method is:

[0066] S1, according to the installation surface size of the flat pulley 6, the size of the base panel 1 is determined, including the length, width and height from the deck 10 of the ship of the base panel 1. The specific method is as follows:

[0067] S11, the length and width size of the base panel 1: as Figure 1 , the length of the installation surface of the flat pulley 6 is a, the width is b, then the length L of the base panel 1 is a+y1+y2+m, the width W is b+y1+y2+m; wherein y1 is the reserved width allowance of one side of the free edge of the base panel 1, the value range is 5mm≤y1≤10mm; y2 is the reserved welding width of one side of the welding barrier strip 5, the value range is 10mm≤y2≤15mm; m is the width of the barrier strip 5, the value range is 10mm≤m≤20mm.

[0068] S12, the height of the base panel 1 from the deck 10: the height h of the base panel 1 from the deck 10 is determined according to the functional requirements of the flat pulley 6, the space layout of the ship body and the welding operation space requirements and other constraint conditions, and needs to meet h≥350mm; the thickness t1 of the base panel 1 is selected according to the actual working load of the steel wire rope 7: when the traction force of the steel wire rope 7 is <50kN, the value range of t1 is 10mm≤t1≤15mm.

[0069] In the application, the free edge of the base panel 1 is the edge without the barrier strip 5; the length unit mentioned in the application is mm, which will not be repeated hereinafter.

[0070] S2, design the barrier strip 5.

[0071] In the application, the barrier strip 5 is a long strip-shaped flat steel, the axis thereof should be perpendicular to the tension (or component force) direction of the steel wire rope 7 and parallel to the edge of the base panel 1, so as to ensure that the barrier strip 5 can provide a lateral constraint reaction force opposite to the load direction and efficiently share the shear force of the mounting bolt 8; the width of the barrier strip 5 is m, the height is n, 15mm≤n≤30mm; the distance between the barrier strip 5 and the edge of the base panel 1 is equal to the reserved welding width y2 (10mm≤y2≤15mm). The connection between the barrier strip 5 and the base panel 1 adopts double-face open-break welding process, and the corner welding is additionally arranged on one side of the short edge. Before the installation of the flat pulley 6, the welding leg close to the flat pulley 6 on one side of the barrier strip 5 needs to be polished, so as to ensure that the installation surface of the flat pulley 6 is completely coplanar with the base panel 1, and the edge of the pulley bottom plate 9 is in close contact with the barrier strip 5.

[0072] S3, arrange the web plate 3 and the knee plate 2. Specifically, the following designs are included:

[0073] The board strip parallel to the long side of the base panel 1 is called the web 3, and the board strip parallel to the short side of the base panel 1 is called the knee 2; the web 3 is designed continuously, and the knee 2 is arranged discontinuously at the intersection position with the web 3 (the knee 2 is discontinuous at the intersection position);

[0074] According to the length and width dimensions of the aforementioned base panel 1, 2-3 webs 3 and 2-3 knees 2 are arranged along the longitudinal direction (long side direction) and the transverse direction (short side direction) of the base respectively, and the longitudinal and transverse directions are staggered;

[0075] As shown in Figure 1 The distance p1 between adjacent webs 3 can not be equal, and the value range is 200mm≤p1≤s (s is the spacing between deck longitudinal girders); the distance p2 between adjacent knees 2 can not be equal, and the value range is 200mm≤p2≤s;

[0076] The distance of the web 3 from the edge of the base panel 1 is p3, and the distance of the knee 2 from the edge of the base panel 1 is p4, both of which need to satisfy p3≤200mm and p4≤200mm;

[0077] The static clearance distance d of the web 3, the knee 2, or the edge of the base panel 1 from the center of the bolt hole of the mounting bolt 8 needs to satisfy d≥2d0, where d0 is the bolt hole diameter;

[0078] The arrangement of the web 3 and the knee 2 needs to be preferentially aligned with the deck beam or longitudinal girder;

[0079] The thickness t2 of the web 3 and the knee 2 is determined according to the working load of the steel wire rope 7: when the pulling force of the steel wire rope 7 is <50kN, the value range is 8mm≤t2≤12mm.

[0080] S4, short beam 4 arrangement and base panel 1 hole design, specifically including the following design:

[0081] S41, short beam 4 design: the web 3 or the knee 2 should extend to the nearby ship structure (such as beam or deck longitudinal girder) perpendicular to it and be fixedly connected; when the spacing between the base panel 1 and the ship beam is large, the web 3 and the knee 2 cannot be directly connected to the ship beam at a short distance, and a short beam 4 needs to be added near the base panel 1 as a transition force transmission member; the specification of the short beam 4 is the same as that of the nearby deck longitudinal girder, and the distance k of the short beam 4 from the edge of the base panel 1 is 50mm≤k≤150mm.

[0082] S42, process hole 11 design of the base panel 1: sufficient operation space is provided for double-sided welding of the web 3, the knee 2, and the deck 10, and process holes 11 need to be opened on the base panel 1; the holes are opened within the internal grid range of the base panel 1, and the outermost web 3 and knee 2 are reserved, as shown in Figure 1The distance between the opening edge and the adjacent web plate 3 and knee plate 2 is equal to the reserved welding width y2; the web plate 3 and knee plate 2 within the opening range are cancelled; the opening shape is generally a round rectangle, and the chamfer radius is r, r≥0.2s, s being the deck longitudinal beam spacing.

[0083] The content not described in detail in the specification belongs to the prior art known to those skilled in the art.

[0084] Finally, it should be noted that the above is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application is described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements for some of the technical features, but any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A flat-mounted pulley base, characterized in that, Includes base panel, connecting components, and blocking strip; The base panel is horizontally positioned below the deck of the ship, and the upper part of the base panel is fixedly connected to the deck via connecting components distributed along the transverse and longitudinal directions. A blocking strip is fixed to the lower surface of the base panel; The base plate of the flat pulley is detachably connected to the base panel, and the side of the pulley base plate is in contact with the inner side of the blocking strip; the flat pulley is connected to the wire rope drive.

2. The flat-mounted pulley base as described in claim 1, characterized in that, The connecting assembly includes longitudinally and transversely arranged elbow plates and web plates; there are multiple elbow plates, which are spaced apart longitudinally along the base panel; the bottom of the elbow plate is connected to the base panel, and the top of the elbow plate is connected to the deck; there are multiple web plates, which are spaced apart transversely along the base panel; the bottom of the web plate is connected to the base panel, and the top of the web plate is connected to the deck; the elbow plates and web plates are arranged perpendicularly and alternately.

3. The flat-mounted pulley base as described in claim 2, characterized in that, The elbow plate and the web plate extend outward at both ends and are connected to the hull frame.

4. The flat-mounted pulley base as described in claim 3, characterized in that, When there is no hull frame available for connection at the two ends of the elbow plate or web plate, a short crossbeam is added for connection between the elbow plate and web plate; the short crossbeam is adapted to be connected to the two ends of the elbow plate or web plate, and the top of the short crossbeam is fixedly connected to the deck.

5. The flat-mounted pulley base as described in any one of claims 2 to 4, characterized in that, The base panel has process holes.

6. The flat-mounted pulley base as described in claim 5, characterized in that, The blocking strip is a long, flat steel bar, with double-sided openings welded to the base panel.

7. The flat-mounted pulley base as described in claim 6, characterized in that, Both the base panel and the pulley base plate adopt a rectangular structure design, and a blocking strip is set along one long side and one adjacent short side of the base panel.

8. The flat-mounted pulley base as described in claim 2, characterized in that, The elbow plate and the base panel, the elbow plate and the deck, the web plate and the base panel, the web plate and the deck, and the web plate and the elbow plate are all fixed by welding.

9. The flat-mounted pulley base as described in claim 2, characterized in that, The distance between adjacent web plates and the distance between adjacent elbow plates are both greater than 200 mm.

10. A design method for a flat-mounted pulley base as described in claim 5, characterized in that, The method is as follows: S1. Determine the dimensions of the base panel based on the dimensions of the flat-mounted pulley mounting surface, including the length, width, and height of the base panel from the ship's deck; If the length of the mounting surface of the flat pulley is a and the width is b, then the length L of the base panel is L = a + y1 + y2 + m, and the width W is W = b + y1 + y2 + m; where y1 is the reserved width allowance on one side of the free edge of the base panel, and the value range is 5mm ≤ y1 ≤ 10mm; y2 is the reserved welding width on one side of the welding blocking strip, and the value range is 10mm ≤ y2 ≤ 15mm; m is the width of the blocking strip, and the value range is 10mm ≤ m ≤ 20mm. The height h of the base panel from the ship's deck is ≥350mm; the thickness t1 of the base panel is selected based on the actual working load of the wire rope. S2. Design a blocking strip; the width of the blocking strip is m, the height is n, 15mm≤n≤30mm; the distance between the blocking strip and the edge of the base panel is equal to the reserved welding width y2, 10mm≤y2≤15mm; S3. Arrange the web plates and elbow plates; the distance p1 between adjacent web plates is 200mm≤p1≤s, where s is the spacing between the longitudinal ribs of the deck; the distance p2 between adjacent elbow plates is 200mm≤p2≤s; the distance between the web plate and the edge of the base panel is p3, and the distance between the elbow plate and the edge of the base panel is p4, both of which must satisfy p3≤200mm and p4≤200mm; The thickness t2 of the web and the elbow plate is determined based on the working load of the wire rope. S4. Short crossbeam arrangement and base panel opening design; The specifications of the short crossbeams are the same as those of the nearby deck longitudinals, and the distance between the short crossbeams and the edge of the base panel is k, with a value range of 50mm≤k≤150mm. All parameters are in mm.

Images