Suspension arm shelf with methanol ventilation protection function

Abstract

The invention relates to a suspension arm shelf with methanol ventilation and protection functions, which is characterized in that four shelf main body upright posts arranged in an array are welded and fixed through spaced platform plates to form a lower main body structure; open holes are formed in the platform plates in a staggered mode, straight ladders are arranged at the positions corresponding to the open holes, and round holes allowing the methanol ventilation mast to penetrate through conveniently are formed in the same vertical position of the platform plates and used for installing the methanol ventilation mast and enhancing elastic fixing. A top extension shelf is fixedly arranged on the uppermost layer of platform plate of the lower main body structure, a suspension arm fixing seat is welded at the top end of the top extension shelf, and when a crane suspension arm is in a storage state, the end part of the crane suspension arm is clamped in a groove of the suspension arm fixing seat, so that the crane suspension arm is fixed.

Description

Technical Field

[0001] The invention relates to a boom rack used for methanol ventilation protection and belongs to the technical field of ship design. Background Art

[0002] At present, in order to reduce carbon emissions and improve the environmental performance of ships, the construction orders of ships using methanol as a driving fuel are constantly increasing. A breathable mast must be installed on ships using methanol fuel to ensure that the excess vaporized methanol is discharged when the fuel storage tank generates a large internal pressure due to the volatilization of methanol. The breathable mast is usually more than 15m above the deck. The pipe wall of the breathable mast is thin and has limited strength. Especially on ships carrying deck cargo, it is easy to cause damage to the breathable mast due to collision during lifting operations. Therefore, effective protection measures need to be provided for the breathable mast. In addition, a crane is installed on the ship, and the end of the boom needs to be parked on a fixed base to ensure that the boom will not be swung due to the huge inertia during the voyage of the ship, causing danger.

[0003] Since relatively few methanol-fueled ships have been built, there are not many references for the protective structure of the breathable mast. There are relatively many types of crane boom rack structures. Usually, the crane boom rack is in the form of plate reinforcement structure, truss structure and plate frame structure. The plate reinforcement structure has good strength and small deformation, but its disadvantage is that it is heavy, especially for high tower structures; the truss structure can effectively reduce the weight, but its structural form is relatively weak and prone to large deformation; the plate frame structure is composed of a combination of steel plates and truss structures, has a certain strength and is much lighter than the plate reinforcement structure.

[0004] The existing boom rack structures used on ships usually adopt truss structures or plate reinforcement structures. The disadvantage of the truss structure is that there is no step-changing platform, which makes climbing difficult. Although it can provide certain protection, the overall strength is limited. Taking the steel tube truss structure as an example, the position where the steel tubes support each other is hollow, resulting in the ineffective transmission of force, which causes stress concentration. The plate reinforcement structure mainly relies on steel plates to bear shear force and bending moment. The thickness of the steel plate can reach 30mm or even greater, resulting in a rapid increase in weight. Therefore, under normal circumstances, both are only suitable for making boom racks with lower heights.

[0005] Therefore, the current problems are as follows:

[0006] 1) The two conventional structural forms are difficult to use to build a boom shelf that is more than 20 meters long and must be able to withstand lateral and vertical forces of approximately 30 tons respectively;

[0007] 2) The current boom rack is not considered to be used as a breathable mast protection function for methanol-fueled ships, and cannot prevent the vaporized methanol from escaping into the air;

[0008] 3) For methanol ships with cranes, separately installing crane brackets and methanol ventilating masts will occupy more deck area, increase safety hazards and vibration risks, and be detrimental to the optimization of the overall ship layout. Summary of the invention

[0009] The present invention aims to protect the towering methanol breathable masts of the ships that are currently using methanol as fuel and can also serve as a parking rack for deck cranes. It provides a boom rack that can also serve as methanol breathable protection to solve the current problems of fragile breathable masts and the parking and maintenance of cranes.

[0010] The present invention adopts the following technical solutions:

[0011] A boom shelf that also serves as a methanol breathable protection, wherein four main shelf columns 1 arranged in an array are welded and fixed via spaced platform plates 2 to form a lower main structure; openings are staggered on each platform plate 2, and a straight ladder 4 is provided at a position corresponding to the opening; a circular hole is provided at the same vertical position on each platform plate 2 to facilitate the passage of a methanol breathable mast 11, and is used for the installation, passage, and elastic fixation reinforcement of the methanol breathable mast 11; a top extension shelf 6 is fixedly provided on the uppermost platform plate of the lower main structure, and a boom fixing seat 7 is welded to the top end of the top extension shelf 6, and when the crane boom 10 is in a storage state, its end is stuck in a groove of the boom fixing seat 7 to be fixed.

[0012] Preferably, the straight ladder 4 and the protective ring 8 are welded and installed on the back of the top extension shelf 6 .

[0013] Preferably, it also includes a welded reinforcing elbow plate 3 connecting the shelf main body column 1 and the platform plate 2.

[0014] Preferably, the size of the opening is 600 mm×600 mm, and a local reinforcement plate 9 is provided between the two uppermost platform plates 2 .

[0015] Preferably, the top extension shelf 6 adopts a plate reinforcement structure to increase strength and rigidity, and the straight ladder 4 and the protective ring 8 are welded and installed on the back of the top extension shelf 6.

[0016] A boom rack with methanol ventilation protection. The front end of the crane arm 10 is placed in the groove of the boom fixing seat 7. When subjected to lateral load, the baffle structures on both sides of the boom fixing seat 7 limit the displacement of the crane arm 10, and the force is transmitted through the top extension shelf 6 and finally borne by the entire boom rack main structure; the methanol ventilation mast 11 passes through each layer of platform board 2 and is fixed accordingly, and finally extends out from the topmost platform board 2 of the lower body, and its height is 20.8-1.2m away from the platform board, which is convenient for personnel to maintain it; the staff climbs up from the straight ladder 4 located on the deck layer by layer to reach the local reinforcement plate 9, moves to the outer platform board 2 through the opening on it, and then passes through the straight ladder 4 to the topmost layer of the lower body. Through the straight ladder 4 fixed on the top extension shelf 6, the staff can directly reach the boom fixing seat position 7 under the protection of the protective ring 8 for maintenance and repair.

[0017] The beneficial effects of the present invention are:

[0018] 1) The structure of lower plate frame and upper plate reinforcement is adopted, which effectively reduces the weight of the whole structure while ensuring the strength; and the upper part adopts a smaller plate frame structure to ensure that the top of the air-permeable mast is in an open-air state and the upward exhaust is not hindered.

[0019] 2) It has good strength to protect the methanol ventilation mast and is highly reliable. The upper structure has sufficient strength to support the crane boom and does not hinder the ventilation of methanol, making it convenient for personnel to board and perform maintenance.

[0020] 3) The methanol ventilation mast is provided with more effective and stronger protection. The device has good structural strength and is elastically fixed to the ventilation mast, which can ensure that the stress on the ventilation mast is reduced when cargo collides with it, thus avoiding its deformation or even damage.

[0021] 4) The variable structure combination in the height direction is lightweight and ensures smooth exhaust. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the boom shelf of the present invention that also functions as methanol breathable protection, wherein (c) is a side view, (a) is view B in (c), and (b) is view A in (c).

[0023] In the figure, 1. main column of the shelf, 2. platform plate, 3. reinforced elbow plate, 4. straight ladder, 5. railing handrail, 6. top extension shelf, 7. boom fixing seat, 8. protective ring, 9. local reinforcement plate, 10. crane boom, 11. methanol ventilation mast. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] See also Figure 1 A boom rack with methanol ventilation protection. The structure includes: a rack main body column 1, a platform plate 2, a reinforcing toggle plate 3, a straight ladder 4, a handrail 5, a top extension rack 6, a boom fixing seat 7, a protective ring 8, a local reinforcement plate 9, a crane boom 10, and a methanol ventilation mast 11.

[0026] A boom rack for methanol ventilation protection, wherein four rack main body columns 1 arranged in an array are welded and fixed through spaced platform plates 2 to form a lower main structure; openings are arranged on each platform plate 2 in a staggered manner, and a straight ladder 4 is arranged at a position corresponding to the opening; a circular hole is arranged at the same position of each platform plate 2 vertically to facilitate the passage of a methanol ventilation mast 11, which is used for the installation and elastic fixation of the methanol ventilation mast 11; a top extension rack 6 is fixedly arranged on the uppermost platform plate of the lower main structure, and a boom fixing seat 7 is welded at the top of the top extension rack 6, and when the crane boom 10 is in a storage state, its end is stuck in the groove of the boom fixing seat 7, thereby being fixed. The size of the opening is 600mm×600mm, and a local reinforcement plate 9 is arranged between the two uppermost platform plates 2.

[0027] The main column 1 of the shelf is made of rectangular steel pipe, which is fixed with the spaced platform plate 2 by welding to form a whole, forming the main structure of the lower part, and the main column 1 of the shelf and the platform plate 2 are connected by welding reinforcing elbow plates 3 to further reinforce the overall structure.

[0028] Each platform plate 2 is provided with a 600mm×600mm opening and a straight ladder 4 is provided at the position corresponding to the opening. The reinforcing bracket 3 of the uppermost layer is replaced by a local reinforcing plate 9. Each platform plate 2 is provided with a circular hole for the methanol ventilation mast 11 to pass through, which is used for the installation and elastic fixing and reinforcement of the methanol ventilation mast 11.

[0029] A top extension shelf 6 is further arranged on the uppermost platform of the main body. Due to its small cross section, a plate reinforcement structure is adopted to increase strength and rigidity. The top extension shelf 6 is connected to the uppermost platform plate 2 of the lower main body by welding. A straight ladder 4 and a protective ring 8 are welded and installed on the back of the top extension shelf 6. A boom fixing seat 7 is welded on the top of the top extension shelf 6. When the crane boom 10 is in the storage state, its end is stuck in the groove of the boom fixing seat 7, so as to be fixed.

[0030] In this embodiment, see Figure 1 (b) and (c), the straight ladder 4 and the protective ring 8 are welded and installed on the back of the top extension shelf 6.

[0031] In this embodiment, see Figure 1 (a), also includes a welded reinforcing elbow plate 3 connecting the shelf main body column 1 and the platform plate 2.

[0032] In this embodiment, see Figure 1 (c) The top extension shelf 6 adopts a plate reinforcement structure to increase strength and rigidity, and the straight ladder 4 and the protective ring 8 are welded and installed on the back of the top extension shelf 6.

[0033] The front end of the crane arm 10 is placed in the groove of the arm fixing seat 7. When subjected to lateral loads, the baffle structures on both sides of the arm fixing seat 7 limit the displacement of the crane arm 10, and transmit the force through the top extension shelf 6 and finally bear it by the entire boom shelf main structure; the methanol ventilation mast 11 passes through each layer of platform plate 2 and is fixed accordingly, and finally extends out from the topmost platform plate 2 of the lower body, and its height is 20.8-1.2m away from the platform plate, which is convenient for personnel to maintain it; the staff climbs up from the straight ladder 4 on the deck layer by layer to reach the local reinforcement plate 9, moves to the outer platform plate 2 through the opening on it, and then passes through the straight ladder 4 to the topmost layer of the lower body. Through the straight ladder 4 fixed on the top extension shelf 6, the staff can directly reach the position 7 of the boom fixing seat for maintenance and inspection under the protection of the protective ring 8.

[0034] The present invention adopts a structure in which the lower plate frame and the upper plate ribs are used, which more effectively reduces the weight of the entire structure while ensuring the strength; and the upper part adopts a smaller plate frame structure to ensure that the top of the ventilation mast is in an open-air state, and the upward exhaust is not hindered. It has good strength to protect the methanol ventilation mast and is highly reliable. The upper structure can have sufficient strength to support the crane boom and does not hinder the ventilation of methanol, making it convenient for personnel to board and perform maintenance. The methanol ventilation mast is more effectively and strongly protected. The device has good structural strength and is elastically fixed to the ventilation mast, which can ensure that the stress on the ventilation mast is reduced when the cargo collides with it, avoiding its deformation or even damage. The variable structure combination in the height direction is lightweight and ensures smooth exhaust.

[0035] The above are preferred embodiments of the present invention. Those skilled in the art may also make respective changes or improvements thereon. Without departing from the general concept of the present invention, these changes or improvements shall fall within the scope of protection claimed by the present invention.

Claims

1. A suspension arm rack with methanol ventilation protection, characterized in that: Four main frame columns (1) arranged in an array are welded and fixed via spaced platform plates (2) to form a lower main structure; Each platform plate (2) is provided with openings in a staggered manner, and a straight ladder (4) is provided at a position corresponding to the opening. Each platform plate (2) is provided with a circular hole at the same vertical position for the methanol ventilation mast (11) to pass through, and is used for the installation, passing and elastic fixing and strengthening of the methanol ventilation mast (11); A top extension shelf (6) is fixedly arranged on the uppermost platform plate of the lower main structure, and a boom fixing seat (7) is welded to the top of the top extension shelf (6). When the crane boom (10) is in a storage state, its end is stuck in a groove of the boom fixing seat (7) to be fixed.

2. The methanol-permeable protection boom rack as claimed in claim 1, characterized in that: A straight ladder (4) and a protective ring (8) are welded and installed on the back of the top extension shelf (6).

3. The boom rack for methanol ventilation protection as claimed in claim 1, characterized in that: It also includes a welded reinforcing elbow plate (3) connecting the shelf main body column (1) and the platform plate (2).

4. The methanol breathable protection boom rack as claimed in claim 1, characterized in that: The size of the opening is 600 mm×600 mm, and a local reinforcement plate (9) is provided between the two uppermost platform plates (2).

5. The boom rack for methanol ventilation protection as claimed in claim 1, characterized in that: The top extension shelf (6) adopts a plate reinforcement structure to increase strength and rigidity, and a straight ladder (4) and a protective ring (8) are welded and installed on the back of the top extension shelf (6).

6. A methanol breathable protection boom rack as claimed in any one of claims 1 to 5, characterized in that: The front end of the crane arm (10) is placed in the groove of the arm fixing seat (7). When subjected to a lateral load, the baffle structures on both sides of the arm fixing seat (7) limit the displacement of the crane arm (10), and transmit the force through the top extension shelf (6) and finally the entire boom shelf main structure bears it; the methanol ventilation mast (11) passes through each layer of the platform plate (2) and is fixed accordingly, and finally extends out from the uppermost platform plate (2) of the lower body, and its height is 0.8-1.2m from the platform plate (2), so that it is convenient for personnel to maintain it; The staff climbs up layer by layer from the vertical ladder (4) located on the deck to reach the local reinforcement plate (9), moves to the outer platform plate (2) through the opening on the plate, and then goes to the top layer of the lower body through the vertical ladder (4). Through the vertical ladder (4) fixed on the top extension shelf (6), the staff can directly reach the boom fixing seat position (7) under the protection of the protective ring (8) to perform maintenance and repair.

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