A rotatable distress light for a methanol dual-fuel bulk carrier and method of arrangement

Abstract

This invention discloses a rotatable runaway light and its arrangement method for a methanol dual-fuel bulk carrier, belonging to the field of shipbuilding technology. Addressing the problems of excessive arc obstruction angle, non-adjustable angle, and poor vibration resistance caused by the starboard placement of the funnel area on methanol dual-fuel bulk carriers, this invention designs a rotatable runaway light structure consisting of a compass deck, radar mast, runaway light, runaway light holder, and an adjustable illumination range light source. The adjustable illumination range light source mechanism achieves precise angle adjustment. Combined with symmetrical arrangement on both sides and a light shield, the light obstruction angle is controlled within 4.8°, meeting the ≤6° requirement of the International Maritime Collision Avoidance Code. Simultaneously, it solves the problem of light deviation caused by low-frequency vibrations in new energy vessels, reducing installation and maintenance costs. This invention is structurally reliable, easy to adjust, fully compliant with maritime regulations, and adaptable to the special hull arrangement of methanol dual-fuel bulk carriers.

Description

Technical Field

[0001] This invention relates to a rotatable runaway light and its arrangement method for a methanol dual-fuel bulk carrier, which belongs to the field of shipbuilding technology. Background Technology

[0002] Ships in distress need to comply with the International Regulations for Preventing Collisions at Sea (COLREG). Article 27 of the COLREG stipulates that "a ship in distress shall display: (1) two all-around red lights in the most visible position, vertically. Article 21 defines all-around lights as lights that display continuous light within a horizontal arc of 360 degrees. Appendix I, Article 9, requires the following for the horizontal arc: (2) ① The all-around lights shall be placed in a position where they are not obstructed by a mast, top mast or structure at an arc greater than 6 degrees. ② If displaying only one all-around light does not meet the requirements of subsection (2) ① of this paragraph, then two all-around lights shall be used, fixed in a suitable position or obstructed by a shield, so that they appear as one light as possible at a distance of 1 nautical mile."

[0003] According to the above specifications, a runaway light should meet the following conditions: 1. The lighting type is an all-around light; 2. The all-around light should display continuous light within a 360-degree horizontal arc; 3. The all-around light should be installed in a position where it is not obstructed by a mast, top mast, or building at an angle greater than 6 degrees of light arc; 4. If a single light cannot meet the requirements of the above items, two all-around lights should be used, fixed in a suitable position or shielded with a baffle, so that they appear as a single light as possible at a distance of 1 nautical mile.

[0004] In recent years, with the rapid development of the shipping industry and global demands for reducing carbon emissions, orders for new energy ship types have surged, with orders for new energy ships fueled by LNG, methanol, and ammonia appearing on the market. Among these, methanol, as a relatively mature and environmentally friendly fuel, is increasingly favored by shipowners.

[0005] For methanol dual-fuel powered bulk carriers, the existing conventional bulk carrier technology has the following shortcomings: 1. Methanol dual-fuel bulk carriers have a unique hull layout compared to conventional bulk carriers, especially in the arrangement of the funnel area. Conventional bulk carriers have their funnel area located directly behind the living quarters, while methanol dual-fuel carriers have their funnel area located to the right of the living quarters.

[0006] The conventional uncontrolled lights on bulk carriers create an average permanent obstruction angle of 11°-25° in the hull structure of methanol dual-fuel bulk carriers, far exceeding the upper limit specified by COLREG. Even with 180°+180° all-around lights on both port and starboard sides, it is still impossible to avoid the obstruction of the light illumination range by the chimney area. In particular, Article 9 requires the following for the horizontal light arc: (2) ① The all-around lights should be installed in a position where they are not obstructed by the mast, top mast or buildings at an angle greater than 6 degrees.

[0007] 2. The installation angle of the runaway lights on conventional bulk carriers is difficult to adjust. New energy ships will generate unique structural vibrations. For example, methanol fuel systems will cause low-frequency vibrations of 3-7Hz. Under marine conditions, the mechanical structure of traditional runaway lights is prone to angular displacement over time. Angular displacement will cause the runaway lights to fail to meet COLREG requirements.

[0008] Conventional uncontrolled lights on bulk carriers are mounted on a structure consisting of a radar mast, bracket, base, and mounting plate, and secured with bolts. Once installed, the signal light is rigidly fixed to the radar mast and cannot be moved or rotated. Adjustment of the light's illumination range can only be achieved manually by altering the holes in the mounting plate.

[0009] In summary, using the conventional runaway lights and their arrangement on conventional bulk carriers is insufficient to meet the horizontal arc range requirements of the COLREG (Collision Avoidance Regulations). Therefore, a different runaway light and arrangement method than that used on conventional bulk carriers is needed to meet the horizontal arc range requirements of the collision avoidance regulations. Summary of the Invention

[0010] To address the issue that conventional runaway light arrangement methods for bulk carriers in the existing technology cannot meet the requirements of COLREG for the horizontal arc range of the all-around lights, this invention provides a rotatable runaway light and its arrangement method for methanol dual-fuel bulk carriers. By rotating and adjusting the runaway light as a whole or its shield, the requirements for the illumination range can be met.

[0011] Methanol dual-fuel bulk carriers are equipped with a funnel area and a radar mast. The radar mast is fitted with starboard and port-side emergency lights. The funnel area is located slightly to the right of the radar mast, forming an angle of 22°-27° with the center point of the starboard emergency light as the focal point. Due to the unique layout of methanol dual-fuel bulk carriers, the funnel area is located slightly to the right of the living quarters. This funnel area, along with the radar mast, creates a blind spot for the emergency lights, making conventional emergency lights unable to meet the collision avoidance rules' requirements for the shielding angle of the all-around lights. The technical solution adopted in this invention is: a rotatable emergency light for methanol dual-fuel bulk carriers, using an all-around light with an emergency light shield. The light source is mounted on an emergency light holder via an emergency light mounting base. The emergency light holder is fixedly connected to the radar mast support, which is fixed to the radar mast mounted on the compass deck. The emergency light's illumination range can be adjusted by rotation, including either a complete emergency light rotation mode or a shield rotation mode.

[0012] Furthermore, the overall rotation mode of the out-of-control light is as follows: The uncontrolled light mounting base includes an outer ring fixed base and an inner ring sliding base. The outer ring fixed base is mounted on the uncontrolled light holder and is equipped with a scale. The uncontrolled light source is mounted on the inner ring sliding base. An angle mark is set at 0° on the ship's centerline on the outer ring fixed base. The outer ring fixed base and the inner ring sliding base are equipped with a pin-type locking mechanism. The power line passes through the hollow radar mast support, the hollow uncontrolled light mounting base, the center hole of the base, and the center hole of the fixed plate and connects to the uncontrolled light source.

[0013] Furthermore, the rotation mode of the light shield is as follows: the edge array of the runaway light light shield is provided with an arc-shaped waist-shaped hole, and an angle mark is provided on one side. The runaway light mounting base is provided with a dial, and the power line passes through the hollow radar mast support and the runaway light source is connected through the center hole of the base.

[0014] Furthermore, the uncontrolled light holder has a symmetrical structure, allowing for the addition of another signal light that shares the same holder with the uncontrolled light. The other ship signal lights are the Singapore Strait all-around light and deep-draft light.

[0015] The method for deploying rotatable runaway lights on methanol dual-fuel bulk carriers, when using the overall rotation mode of the runaway lights, includes the following steps: S1. Adjust the angle of the port side emergency light so that the 0° mark on the outer ring of the port side emergency light's mounting base aligns with the ship's centerline. The centerline needs to be calibrated using a total station. S2. Set the initial angle of the inner ring sliding base angle mark (red arrow) in the runaway light mounting base to 0°, and the runaway light's light shielding area to 0°-180°. S3. Using the 0° mark on the ship's centerline as a reference, adjust the inner sliding base of the runaway light mounting base until the angle mark (red arrow) points to the target angle, rotating the angle mark (red arrow) to the 315° mark displayed on the outer fixed base. When the alignment error of the scale line is ≤0.5°, release the locking pin and rotate it to lock. Perform a final verification using the scale mirror. The same operation applies to the first port side emergency light and the second port side emergency light. S4. Adjust the angle of the starboard malfunction indicator light so that the 0° mark on the outer ring of the starboard malfunction indicator light's mounting base aligns with the ship's centerline. The centerline needs to be calibrated using a total station. S5. Set the initial angle of the inner ring sliding base angle mark (red arrow) in the runaway light mounting base to 0°, and make the runaway light shield cover the area of ​​180°-360° (0°). S6. Using the 0° mark on the ship's centerline as a reference, adjust the inner sliding base of the runaway light mounting base until the angle mark (red arrow) points to the target angle, rotating the angle mark (red arrow) to the 315° mark displayed on the outer fixed base. If the scale alignment error is ≤0.5°, release the locking pin and rotate it to lock. Perform a final verification using the scale mirror. The same operation applies to the first starboard malfunction indicator light and the second starboard malfunction indicator light.

[0016] Furthermore, the method for arranging rotatable runaway lights on methanol dual-fuel bulk carriers, when using a rotating shield mode, includes the following steps: S1. Adjust the angle of the port side failure light so that the 0° mark on the port side failure light mounting base is aligned with the ship's centerline. The centerline needs to be calibrated using a total station. S2. Adjust the blind spot of the runaway light to 0°-180°. S3. Using the 0° mark on the ship's centerline as a reference, adjust the angle mark (red arrow) of the runaway light's shield to point towards the target angle, rotating it to the 315° mark displayed on the runaway light mounting base. When the alignment error of the scale line is ≤0.5°, use bolts to secure it through the curved oblong hole, and perform a final verification using a scale mirror. The same operation applies to the first port side emergency light and the second port side emergency light. S4. Adjust the angle of the starboard malfunction indicator lamp so that the 0° mark on the starboard malfunction indicator lamp mounting base is aligned with the ship's centerline. The centerline needs to be calibrated using a total station. S5. Adjust the blind spot of the runaway light to 180°-360° (0°). S6. Using the 0° mark on the ship's centerline as a reference, adjust the angle mark (red arrow) of the runaway light shield to point towards the target angle, rotating it to the 135° mark shown on the outer ring fixing base. When the alignment error of the scale line is ≤0.5°, use bolts to fix it through the curved waist-shaped hole, and perform final verification through the scale mirror. The same operation applies to the first starboard malfunction indicator light and the second starboard malfunction indicator light.

[0017] Compared with existing technologies, this invention has the following advantages: Addressing the problems of excessive arc obstruction angle, non-adjustable angle, and poor vibration resistance of traditional runaway lights caused by the starboard placement of the funnel area on methanol dual-fuel bulk carriers, this invention designs a rotatable runaway light structure consisting of a runaway light, a runaway light holder, and an adjustable illumination range light source. The adjustable illumination range light source mechanism achieves precise angle adjustment, and combined with symmetrical arrangement on both sides and a light shield, the light obstruction angle is controlled within 4.8°, meeting the requirement of ≤6° according to international maritime collision avoidance regulations. Simultaneously, it solves the problem of light deviation caused by low-frequency vibrations on new energy vessels, reducing installation and maintenance costs. This invention has a reliable structure, is easy to adjust, fully complies with maritime regulations, and is suitable for the special hull layout of methanol dual-fuel bulk carriers.

[0018] 1. The out-of-control light will avoid the blind spot angle created by the chimney area. It meets the requirements of Article 9 of Appendix 1 of the International Collision Avoidance Code for horizontal light arc: (2) ① The all-around light should be placed in a position where it is not blocked by a mast, top mast or building with an angle greater than 6 degrees of light arc.

[0019] 2. The out-of-control light will intersect at a direction 45° to the left and 135° to the right relative to the bow, so that it looks like a light from 1 nautical mile away, which satisfies the requirement of Article 9 (2) ② of Appendix 1 of the Collision Avoidance Rules: to make it look as much as possible like a light at a distance of 1 nautical mile.

[0020] 3. The lighting range can be adjusted with simple operation, meeting the requirements while saving labor costs. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram showing the vertical arrangement of the runaway lights.

[0023] Figure 2 This is a schematic diagram showing the horizontal arrangement of the runaway lights.

[0024] Figure 3 This is a schematic diagram of a single malfunctioning lamp in Example 1.

[0025] Figure 4 This is a schematic diagram of the uncontrolled lamp angle adjustment device in Example 1.

[0026] Figure 5 This is a schematic diagram of the angle adjustment of a single malfunctioning lamp in Example 1.

[0027] Figure 6 This is a schematic diagram of the angle adjustment of the runaway lamp in Example 1.

[0028] Figure 7 This is a schematic diagram of the uncontrolled lamp angle adjustment device in Example 2.

[0029] Figure 8 This is a schematic diagram of the angle adjustment of a single malfunctioning lamp in Example 2.

[0030] Figure 9 This is a schematic diagram of the angle adjustment of the runaway lamp in Example 2.

[0031] Figure 10 This is a schematic diagram of the smokestack area and blind spots of a methanol dual-fuel bulk carrier.

[0032] In the picture: 1. Compass deck; 2. Radar mast, 21, Radar mast support; 3. Chimney area; 4. Failure warning lights: 4P (port side failure warning), 4S (starboard side failure warning). 4P1, First port side failure light; 4P2, Second port side failure light; 4S1, First starboard side failure light; 4S2, Second starboard side failure light. 41. Uncontrolled lamp holder, 42. Uncontrolled light mounting base; 420. Base center hole; 421. Outer ring fixing base; 4211. Scale lines; 422. Inner ring sliding base; 4221. Angle markings; 423. Pin-type locking mechanism. 43. Light source for the runaway light; 430. Center hole of the mounting plate; 431. Mounting plate for the runaway light. 44. Runaway lamp shield; 441. With curved waist-shaped hole; 5. Blind spots; 6. Ship centerline; 7. Other ship signal lights. Detailed Implementation

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. 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.

[0035] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0036] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0037] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0038] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0039] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0040] Methanol dual-fuel bulk carriers are equipped with chimney areas and radar masts, such as Figure 10 As shown, the radar mast is equipped with starboard and port side emergency lights; the funnel area is located aft and slightly to the starboard side of the radar mast, forming a 25.4° angle with the center point of the starboard emergency light. Due to the special arrangement of methanol dual-fuel bulk carriers, the funnel area is located aft and slightly to the starboard side of the living quarters. This funnel area, along with the radar mast, constitutes a blind spot for the emergency lights, making conventional emergency lights unable to meet the collision avoidance rules' requirements for the all-around illumination angle. Therefore, a rotatable emergency light and its arrangement method for methanol dual-fuel bulk carriers is proposed. By rotating and adjusting the entire emergency light or its shield, the required illumination range can be met. Specifically: like Figure 1 As shown, to meet the requirements of COLREG, two sets of four malfunction lights 4 are installed on the port and starboard sides of the radar mast 2 on the compass deck 1 of the ship: the first port malfunction light 4P1 and the second port malfunction light 4P2 are two lights on the same vertical line, one above the other; the vertical distance between the first port malfunction light 4P1 and the second port malfunction light 4P2 is greater than or equal to 2 meters, and in this embodiment, the vertical distance is 4.2 meters; the second port malfunction light 4P2 located below is 9.625 meters away from the compass deck 1.

[0041] Similarly, the first starboard malfunction indicator lamp 4S1 and the second starboard malfunction indicator lamp 4S2 are two lamps on the same vertical line, one above the other; the vertical distance between the first starboard malfunction indicator lamp 4S1 and the second starboard malfunction indicator lamp 4S2 is greater than or equal to 2 meters, and in this embodiment, the vertical distance is 4.2 meters; the second starboard malfunction indicator lamp 4S2 located below is 9.625 meters away from the compass deck 1.

[0042] If necessary, other ship signal lights 7 can be installed to share the uncontrolled light holder 41 with the uncontrolled light. In this embodiment, a Singapore light is installed.

[0043] like Figure 2 As shown, the ship is divided into port and starboard sides along its centerline, with the port side designated as P and the starboard side as S. This invention uses two all-around lights, shielded by a runaway light shield 44.

[0044] At the same horizontal level, the port side out-of-control light 4P and the starboard side out-of-control light 4S can avoid the blind spot angle 5 created by the chimney area 3. This meets the requirements of Article 9 of Appendix I of the International Collision Avoidance Code for horizontal light arcs: "(2) ① The all-around lights shall be placed in a position where they are not obscured by a light arc greater than 6 degrees by the mast, top mast or building." The port side out-of-control light 4P and the starboard side out-of-control light 4S at the same horizontal level will intersect each other in a direction of 135° and 315° relative to the ship's centerline, so that they appear as a light at a distance of 1 nautical mile, satisfying the requirement of Appendix I, Article 9 (2) ② of the Collision Avoidance Regulations: to appear as a light as possible at a distance of 1 nautical mile.

[0045] The range of light illumination can be adjusted by adjusting the runaway light shield 44. The runaway light shield 44 can be adjusted in the following two ways. Example 1

[0046] Adjust the entire runaway light 4, such as Figure 3 As shown, taking one of the rotatable runaway lights 4 as an example, a radar mast support 21 is fixed on the radar mast 2, and the runaway light holder 41 is fixed on the radar mast support 21 by bolts. The runaway light holder 41 can install two sets of signal lights at the same time as needed.

[0047] like Figure 3 , 4 As shown in Figure 5, the runaway light 4 is mounted on the runaway light holder 41 via the outer ring fixing base 421 of the runaway light mounting base 42. The runaway light mounting base 42 includes an outer ring fixing base 421 and an inner ring sliding base 422. The outer ring fixing base 421 is provided with a dial, and the inner ring sliding base 422 is provided with an angle mark 4221 at 0° of the ship's centerline 6 on the outer ring fixing base 421, so as to accurately control the relative rotation angle of the inner and outer rings. The outer ring fixing base 421 and the inner ring sliding base 422 are provided with a pin-type locking mechanism 423.

[0048] The runaway light mounting plate 431 is fixed on the inner ring sliding base 422 of the runaway light mounting base 42. The runaway light source 43 is mounted on the runaway light mounting plate 431. The runaway light shield 44 is fixed outside the light source.

[0049] The power cord and signal line pass through the hollow radar mast support 21, the runaway light mounting base 42, the center hole 420 of the base and the center hole 430 of the mounting plate and are connected to the runaway light source 43.

[0050] Specifically, the radar mast support 21 uses a cylindrical rod with an outer diameter of Φ89mm and a wall thickness of 5.5mm; the runaway light holder 41 is made of cast aluminum alloy and has 4 M16 bolt holes; the runaway light mounting base 42 and the runaway light fixing plate 431 are made of anodized aluminum alloy with a central hole diameter of Φ155mm; the runaway light source 43 uses a 65W LED module with IP67 protection; the runaway light shield 44 is made of borosilicate glass with a light transmittance of ≥92% and a temperature resistance of -40℃ to +150℃.

[0051] The runaway light mounting base 42 is composed of an outer ring fixing base 421 made of stainless steel 316L with a diameter of Φ620mm and a thickness of 25mm, and a scale line 4211 with an etching depth of 0.3mm, and an inner ring sliding base 422 made of copper-nickel alloy CN7M with a diameter of Φ580mm and a thickness of 20mm, and a red arrow mark width of 15mm. The outer ring fixed base 421 is coated with a scale dial, and the scale dial is set with corresponding scale lines 4211 at 1° intervals. The surface of the scale is processed by scale processing, and 360 scale lines 4211 are processed by a scribing machine. The line width is 0.2mm and the depth is 0.3mm. Every 15° position, a thick red scale line 4211 with a width of 0.5mm is etched, finally presenting a 360° scale line 4211 ring distribution.

[0052] The inner ring sliding base 422 is configured with a directional arrow at the bow 0° of the outer ring fixed base 421, and the angle mark 4221 is painted with color to accurately control the relative rotation angle of the inner and outer rings.

[0053] During installation, the radar mast 21 is calibrated in three dimensions using a total station to ensure that the parallelism error between its centerline and the ship's longitudinal centerline is less than 0.3°. The stray light holder 41 is rigidly fixed to the radar mast 21 near the ship's side using four sets of M16×120mm high-strength bolts. The stray light holder 41 is fixed to the stray light mounting base 42 near the starboard side of the radar mast 21 using four sets of M16×120mm high-strength bolts. The stray light holder 41 is fixedly connected to the stray light mounting base 42 using bolts, facilitating disassembly and installation during maintenance. The stray light mounting plate 431 is fixed to the stray light mounting base 42 using bolts.

[0054] The outer ring fixed base 421 and the inner ring sliding base 422 are equipped with a pin-type locking mechanism 423, which includes a Φ8mm hardened steel pin (HRC50-55) and a spring loading device, with a pin travel of 15mm. The outer ring fixed base 421 and the inner ring sliding base 422 are locked by rotating the pin.

[0055] The uncontrolled light source 43 passes through the central hole and is waterproofed with a silicone sealing ring with a compression of 1.2mm. The wire is threaded through the inside of the uncontrolled light holder 41 and the radar mast support 21, and the other end is connected to the power supply.

[0056] When using the runaway lamp 4 in embodiment 1, the following arrangement scheme is adopted: First, adjust the angle of the port side runaway light 4P so that the 0° scale line of the outer ring fixing base 421 of the port side runaway light 4P is aligned with the centerline 6 of the ship. The centerline needs to be calibrated using a total station. When installing the runaway light 4, make the initial angle of the angle mark 4221 (red arrow) of the inner ring sliding base 422 in the runaway light mounting base 42 0°, and the shielding area of ​​the runaway light shield 44 is 0°-180°.

[0057] Using the 0° mark on the ship's centerline 6 as a reference, adjust the inner sliding base 422 of the out-of-control light mounting base 42 until the angle mark 4221 (red arrow) points to the target angle, rotating the angle mark 4221 (red arrow) to the 315° mark shown on the outer fixed base 421. At this point, the port side out-of-control light on the P side will rotate 45° counterclockwise relative to the bow direction. When the alignment error of the scale line 4211 is ≤0.5°, release the locking pin and perform a final check using the scale mirror. The same operation is performed for the first port side out-of-control light 4P1 and the second port side out-of-control light 4P2.

[0058] Then adjust the angle of the starboard runaway light 4S so that the 0° scale line of the outer ring fixed base 421 of the starboard runaway light 4S is aligned with the centerline 6 of the ship. The centerline needs to be calibrated using a total station. When installing the runaway light 4, make the initial angle of the angle mark 4221 (red arrow) of the inner ring sliding base 422 in the runaway light mounting base 42 0°. The shielding area of ​​the runaway light shield 44 is 180°-360° (0°).

[0059] Using the 0° mark on the ship's centerline 6 as a reference, adjust the inner sliding base 422 of the out-of-control light mounting base 42 until the angle mark 4221 (red arrow) points to the target angle, rotating the angle mark 4221 (red arrow) to the 315° mark shown on the outer fixed base 421. At this point, the starboard out-of-control light on the S side will rotate 45° counterclockwise relative to the bow direction. When the alignment error of the scale line 4211 is ≤0.5°, release the locking pin and rotate it to lock. Perform a final check using the scale mirror. The same operation applies to the first starboard out-of-control light 4S1 and the second starboard out-of-control light 4S2.

[0060] Table 1 Comparison of Actual Ship Data

[0061] Compared with the traditional layout scheme, this scheme has achieved significant optimization in various performance aspects: the maximum obstruction angle has been reduced from 11.3° to 4.8°, meeting the specification requirement of ≤6°; installation time has been reduced from 36 man-hours to 19 man-hours; annual maintenance cost has been reduced from 8,200 yuan to 3,500 yuan; and vibration offset has been reduced from ±1.7° to ±0.4°, effectively improving navigational visibility safety, reducing construction and maintenance costs, and improving equipment operational stability. Example 2

[0062] Adjust the runaway light shield 44, as follows: Figure 3 As shown, taking one of the rotatable runaway lights 4 as an example, a radar mast support 21 is fixed on the radar mast 2, and the runaway light holder 41 is fixed on the radar mast support 21 by bolts. The runaway light holder 41 can install two sets of signal lights at the same time as needed.

[0063] like Figure 7 , 8 As shown, the runaway lamp is mounted on the runaway lamp holder 41 via the runaway lamp mounting base 42. The runaway lamp mounting base 42 is equipped with a dial, and an angle mark 4221 is provided on one side of the runaway lamp shield 44 to precisely control the rotation angle of the runaway lamp shield relative to the runaway lamp mounting base 42. The edge of the runaway lamp shield 44 is provided with a plurality of curved waist-shaped holes 441.

[0064] The uncontrolled light source 43 is installed on the uncontrolled light mounting base 42, and the uncontrolled light shield 44 is installed on the outside of the light source through the curved waist-shaped hole 441 using bolts.

[0065] The power cord and signal line pass through the hollow radar mast support 21 and the base center hole 420 to connect to the runaway light source 43.

[0066] The uncontrolled light mounting base 42 is coated with a scale dial. The scale dial is set with corresponding scale lines 4211 at 1° intervals. The surface of the scale is processed by a scribing machine to process 360 scale lines 4211 with a line width of 0.2mm and a depth of 0.3mm. Every 15° position, a thick red scale line 4211 with a width of 0.5mm is etched, finally presenting a 360° scale line 4211 ring distribution.

[0067] A directional arrow is provided on one side of the runaway light shield 44 at the 0° direction of the bow, and an angle mark 4221 is painted in color to precisely control the relative rotation angle of the runaway light shield 44.

[0068] During installation, the radar mast 21 is calibrated in three dimensions using a total station to ensure that the parallelism error between its centerline and the ship's longitudinal centerline is less than 0.3°. It is rigidly fixed to the runaway light holder 41 with bolts. The runaway light holder 41 is secured to the side of the radar mast 21 closest to the ship's side using four sets of M16×120mm high-strength bolts. The runaway light holder 41 and the runaway light mounting base 42 are fixedly connected by bolts, facilitating disassembly and installation during maintenance.

[0069] The uncontrolled light source 43 passes through the central hole and is waterproofed with a silicone sealing ring with a compression of 1.2mm. The wire is threaded through the inside of the uncontrolled light holder 41 and the radar mast support 21, and the other end is connected to the power supply.

[0070] When using the runaway lamp 4 in embodiment 2, the following arrangement scheme is adopted: First, adjust the angle of the port side runaway light 4P so that the 0° mark on the port side runaway light 4P mounting base 42 is aligned with the ship's centerline 6. The centerline needs to be calibrated using a total station. When installing the runaway light 4, the area blocked by the runaway light shield 44 is 0°-180°.

[0071] Using the 0° mark on the ship's centerline 6 as a reference, adjust the angle mark 4221 (red arrow) of the runaway light shield 44 to point towards the target angle, rotating it to the 315° mark shown on the runaway light mounting base 42. When the alignment error of the scale line 4211 is ≤0.5°, use bolts to fix it through the curved waist-shaped hole 441, and perform a final verification using a scale mirror. The same operation is performed for the first port side runaway light 4P1 and the second port side runaway light 4P2.

[0072] Then adjust the angle of the starboard runaway light 4S so that the 0° scale line of the starboard runaway light 4S mounting base 42 is aligned with the ship's centerline 6. The centerline needs to be calibrated using a total station. When installing the runaway light 4, the area blocked by the runaway light shield 44 is 180°-360° (0°).

[0073] Using the 0° mark on the ship's centerline 6 as a reference, adjust the angle mark 4221 (red arrow) of the runaway light shield 44 to point towards the target angle, rotating the angle mark 4221 (red arrow) to the 135° mark shown on the outer ring fixed base 421. When the alignment error of the scale line 4211 is ≤0.5°, use bolts to fix it through the curved waist-shaped hole 441, and perform a final verification using a scale mirror. The same operation is performed for the first starboard runaway light 4S1 and the second starboard runaway light 4S2.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rotatable runaway light for a methanol dual-fuel bulk carrier, wherein the methanol dual-fuel bulk carrier is provided with a funnel area (3) and a radar mast (2), and a starboard runaway light and a portboard runaway light are provided on the radar mast (2); the funnel area (3) is located on the starboard side of the radar mast (2), and the funnel area (3) forms an angle of 22°-27° with the center point of the starboard runaway light as the center point, characterized in that: Using an all-around light with a runaway light shield (44), the runaway light source (43) is mounted on the runaway light holder (41) via the runaway light mounting base (42), and the runaway light holder (41) is fixed to the radar mast (2) via the radar mast support (21), and the radar mast (2) is fixed to the compass deck (1). The out-of-control light (4) adjusts the light illumination range by rotating to meet the international collision avoidance rules: the out-of-control light is not blocked by the chimney area at an angle greater than 6 degrees; including the overall rotation mode of the out-of-control light or the rotation mode of the light shield. The overall rotation mode of the out-of-control light is as follows: The out-of-control light mounting base (42) includes an outer ring fixed base (421) and an inner ring sliding base (422). The outer ring fixed base (421) is installed on the out-of-control light holder (41) and a scale is provided. The out-of-control light source (43) is installed on the inner ring sliding base (422) through the out-of-control light fixing plate (431). Angle mark (4221) is set at 0° of the ship centerline (6) on the outer ring fixed base (421). The outer ring fixed base (421) and the inner ring sliding base (422) are provided with a pin-type locking mechanism (423). The power cord passes through the hollow radar mast support (21), the hollow runaway light mounting base (42), the center hole (420) of the base and the center hole (430) of the mounting plate and connects to the runaway light source (43); The rotation mode of the light shield is as follows: the edge array of the runaway light shield (44) is provided with an arc-shaped waist-shaped hole (441), and an angle mark (4221) is provided on one side. The runaway light mounting base (42) is provided with a dial. The power line passes through the hollow radar mast support (21) and the center hole (420) of the base and is connected to the runaway light source (43).

2. The rotatable runaway light for a methanol dual-fuel bulk carrier as described in claim 1, characterized in that, The out-of-control light holder (41) has a symmetrical structure. Other ship signal lights (7) are installed below the out-of-control light holder (41) and share the out-of-control light holder (41) with the out-of-control light. The other ship signal lights (7) are the Singapore Strait All-Around Light and the Deep Draft Light.

3. The operating method of the rotatable runaway light for a methanol dual-fuel bulk carrier as described in claim 1 or 2, characterized in that: When using the overall rotation mode of the runaway light, the following steps are included: S1. Adjust the angle of the port side out-of-control light (4P) so that the 0° scale line of the outer ring fixing base (421) of the port side out-of-control light (4P) is aligned with the centerline of the ship (6). The centerline needs to be calibrated using a total station. S2. Set the initial angle of the inner ring sliding base (4221) of the runaway lamp mounting base (42) to 0°, and set the shading area of ​​the runaway lamp shield (44) to 0°-180°. S3. Using the 0° mark on the ship's centerline (6) as a reference, adjust the inner ring sliding base (422) in the runaway light mounting base (42) until the angle mark (4221) points to the target angle, so that the angle mark (4221) rotates to the 315° mark shown by the outer ring fixed base (421); when the alignment error of the scale line (4211) is ≤0.5°, release the pin to rotate and lock it. S4. Adjust the angle of the starboard out-of-control light (4S) so that the 0° scale line of the outer ring fixing base (421) of the starboard out-of-control light (4S) is aligned with the centerline of the ship (6). The centerline needs to be calibrated using a total station. S5. Set the initial angle of the inner ring sliding base (422) angle mark (4221) in the runaway lamp mounting base (42) to 0°, and set the shielding area of ​​the runaway lamp shield (44) to 180°-360°. S6. Using the 0° mark on the ship's centerline (6) as a reference, adjust the inner ring sliding base (422) in the runaway light mounting base (42) until the angle mark (4221) points to the target angle, so that the angle mark (4221) rotates to the 135° mark shown by the outer ring fixed base (421); when the alignment error of the scale line (4211) is ≤0.5°, release the pin to rotate and lock.

4. The operating method of the rotatable runaway light for a methanol dual-fuel bulk carrier as described in claim 1 or 2, characterized in that, When using the rotating hood mode, the following steps are included: S1. Adjust the angle of the port side out-of-control light (4P) so that the 0° scale line of the port side out-of-control light (4P) out-of-control light mounting base (42) is aligned with the centerline of the ship (6). The centerline needs to be calibrated using a total station. S2. Adjust the blindfold (44) of the runaway light to block the area of ​​0°-180°; S3. Using the 0° mark on the ship's centerline (6) as a reference, adjust the angle mark (4221) of the runaway light shield (44) to point to the target angle, so that the angle mark (4221) rotates to the 135° mark shown on the runaway light mounting base (42); when the alignment error of the scale line (4211) is ≤0.5°, use bolts to pass through the curved waist-shaped hole (441) to fix it. S4. Adjust the angle of the starboard out-of-control light (4S) so that the 0° scale line of the starboard out-of-control light (4S) mounting base (42) is aligned with the centerline of the ship (6). The centerline needs to be calibrated using a total station. S5. Adjust the blindfold (44) of the runaway lamp to block the area of ​​180°-360°; S6. Using the 0° mark on the ship's centerline (6) as a reference, adjust the angle mark (4221) of the runaway light shield (44) to point to the target angle so that the angle mark (4221) rotates to the 135° mark shown on the outer ring fixed base (421). When the alignment error of the scale line (4211) is ≤0.5°, use bolts to pass through the curved waist-shaped hole (441) for fixing.

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