Integrated construction method for hatch cover of bulk cargo ship

Abstract

The invention discloses an integrated construction method of a bulk cargo ship hatch cover, which comprises the following steps: assembling a hatch coaming and a hatch cover in a sectional total assembly stage, mounting a pipe outfitting piece and a hatch cover accessory in place in the stage, and performing oil intermingling operation and tightness test on the pipe outfitting piece in the stage; in the dock carrying stage, only the hatch coaming and the hatch cover need to be hoisted to a ship for installation, and the working procedures are advanced, so that the construction precision and the installation precision of the hatch coaming and the hatch cover are improved, the workload of the dock stage is reduced, the production efficiency of the dock stage is improved, and the dock period is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of shipbuilding, and in particular to a method for integrated construction of a bulk carrier hatch cover. Background Art

[0002] During the current construction of bulk carriers, the welding and inspection of each batch of hatch covers and hatch coamings is often not completed on schedule when they are undocking at the dock stage, resulting in construction being delayed until the dock stage. Furthermore, hatch covers are often hastily hoisted onto the ship one or two days before undocking, and are simply attached to the hatch coamings to make them look complete. However, they still need to be reinstalled at the dock stage.

[0003] Moreover, the hatch coamings, hatch covers, hatch cover accessories, pipes and outfitting are all installed on board in bulk, resulting in low installation efficiency and low installation accuracy. Summary of the Invention

[0004] In view of this, the present invention provides an integrated construction method for bulk carrier hatch covers to solve the problems existing in the above-mentioned background technology.

[0005] A method for constructing an integrated bulk carrier hatch cover comprises the following steps:

[0006] S1, a stage of block assembly, wherein a hatch cover assembly cradle is manufactured, wherein the curvature of the hatch cover assembly cradle surface is the same as the curvature of the bulk carrier deck surface;

[0007] S2, synchronously assembling the hatch coaming segments and the hatch cover segments on the hatch cover assembly jig according to the opening accuracy of the hatch on the deck to obtain the hatch coaming and the hatch cover;

[0008] S3, install pipe fittings on the outer wall of the hatch coaming. After the pipe fittings are installed, perform oil stringing operations and tightness tests on the pipe fittings in sequence;

[0009] S4, pre-assemble the hatch coaming and hatch cover to install the hatch cover accessories in place;

[0010] S6, fix temporary reinforcement frame on hatch cover;

[0011] S7, dock loading phase, the hatch cover and hatch coaming are hoisted onto the ship and installed in place.

[0012] Preferably, in step S2, the specific steps of assembling the hatch coaming segments on the hatch cover assembly jig according to the opening accuracy of the hatch on the deck are:

[0013] Use a total station to measure hatch dimensions and hatch edge levelness;

[0014] Draw a hatch coaming positioning line on the carcass surface of the hatch cover assembly carcass according to the hatch size and the size of the hatch coaming segment;

[0015] Use a total station to measure the levelness of the tire frame surface at the location of the hatch coaming positioning line and determine whether it is equal to the levelness of the hatch edge. If not, adjust the levelness of this location by adding blocks of different heights at the location of the hatch coaming positioning line.

[0016] Preferably, the specific steps of installing pipe fittings on the hatch coaming outer wall in step S3 are:

[0017] Measure the distance from the butt joint pipe to the deck surface above the deck, and draw the pipe and outfitting installation line on the hatch coaming outer wall based on this distance. The distance from the pipe and outfitting installation line to the cradle surface must be equal to the distance from the butt joint pipe to the deck surface.

[0018] Install the pipe and outfitting fittings on the outer wall of the hatch coaming according to the pipe and outfitting installation line.

[0019] Preferably, the specific steps of performing the oil stringing operation on the pipes and outfitting in step S3 are:

[0020] Connect the inlet and outlet of the oil pump to the nozzles at both ends of the pipe fittings through connecting pipes to form an oil injection circuit, and install filters on the connecting pipes;

[0021] Place a vibration pump on the pipe and outfitting;

[0022] Start the oil pump and vibration pump, and the hydraulic oil of the oil pump will be injected into the pipe fittings through the connecting pipeline. At the same time, the vibration pump will vibrate off the attachments attached to the inner wall of the pipe fittings and discharge them out of the pipe fittings along with the hydraulic oil, and then enter the filter for filtration. The hydraulic oil after filtering by the filter will flow back to the oil pump through the connecting pipeline. This process is repeated, and the hydraulic oil circulates in the oil feeding circuit for the set time.

[0023] Preferably, the specific steps of pre-assembling the hatch coaming and the hatch cover in step S4 to install the hatch cover accessories in place are:

[0024] According to the hatch cover design and construction drawings, draw the installation positioning line of the first part of the hatch cover accessories on the hatch cover;

[0025] Install the first part of the hatch cover attachment structure at the installation positioning line of the hatch cover;

[0026] Pre-install the hatch cover on the hatch coaming, and draw the installation positioning line of the second part of the hatch cover attachment structure on the hatch coaming according to the position of the first part of the hatch cover attachment structure on the hatch cover;

[0027] Install the second part of the hatch cover attachment structure at the installation positioning line of the hatch coaming.

[0028] Preferably, the hatch cover accessories include a hydraulic power motor and its guide rails, hatch cover rollers, a clamp, side guide blocks, end positioning blocks, and end limiters.

[0029] Preferably, during the dock loading phase in step S7, the hatch cover and the hatch coaming are simultaneously hoisted onto the ship for installation.

[0030] Preferably, the temporary reinforcement frame includes an inner reinforcement bar attached to the inner side of the hatch cover, a diagonal reinforcement bar connecting two adjacent inner reinforcement bars, a transverse reinforcement bar connecting two opposite inner reinforcement bars, an outer reinforcement bar attached to the inner side of the hatch cover extension beam, and a longitudinal reinforcement bar connecting two opposite outer reinforcement bars.

[0031] The beneficial effects of the present invention are:

[0032] 1. The present invention assembles hatch coamings and hatch covers during the block assembly stage, and also installs pipe fittings and hatch cover accessories at the same time. Meanwhile, the pipe fittings are subjected to oil stringing and tightness testing during the docking stage. During the docking stage, only the hatch coamings and hatch covers need to be hoisted onto the ship for installation. A large number of processes that were originally carried out in bulk on board can be brought forward to the block assembly stage. By bringing forward these processes, not only is the construction and installation accuracy of the hatch coamings and hatch covers improved, but the workload during the docking stage is also reduced, thereby improving production efficiency and shortening the docking cycle.

[0033] 2. The present invention pre-assembles the hatch coaming and the hatch cover when installing the hatch cover accessories, which not only ensures the installation accuracy of the hatch cover accessories, but also allows for re-inspection of the construction accuracy of the hatch coaming and the hatch cover to ensure that their construction accuracy meets the requirements, thereby ensuring that the hatch coaming and the hatch cover are installed in place in one go during the docking phase. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 It is a schematic diagram of the hatch cover assembly frame.

[0036] Figure 2 This is a schematic diagram of the hatch cover.

[0037] Figure 3 This is a schematic diagram of the installation of a temporary reinforcement frame on the hatch cover.

[0038] Figure 4 It is a schematic diagram of the pre-outfitting of hatch cover accessories and hydraulic pipes.

[0039] The meanings of the numbers in the figure are:

[0040] 1 is the hatch cover assembly frame, 2 is the hatch coaming positioning line, 3 is the hatch cover, 4 is the hatch cover body, 5 is the hatch cover extension beam, 6 is the inner reinforcement bar, 7 is the oblique reinforcement bar, 8 is the transverse reinforcement bar, 9 is the outer reinforcement bar, and 10 is the longitudinal reinforcement bar. DETAILED DESCRIPTION

[0041] To make the objectives, technical solutions, and advantages of the present invention more clearly apparent, the present invention is described below using specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.

[0042] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0043] It should be understood that although the terms "first," "second," and so on may be used in this disclosure to describe various types of information, such information should not be limited to these terms and should not be construed as indicating or implying relative importance. These terms are merely used to distinguish information of the same type from one another. For example, first information could also be referred to as second information, and similarly, second information could also be referred to as first information without departing from the scope of this disclosure.

[0044] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "left", "right", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0045] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal communication between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0046] In order to better understand the technical solution of the present invention, the present invention is described in detail below with reference to the accompanying drawings.

[0047] The present invention provides a method for integrated construction of bulk carrier hatch covers, which specifically comprises the following steps:

[0048] S1, the segmented assembly stage, manufactures a hatch cover assembly cradle, the curvature of the hatch cover assembly cradle surface being the same as the curvature of the bulk carrier deck surface.

[0049] Specifically, the curvature of the bulk carrier deck surface is measured using a total station, and then a hatch cover assembly cradle with a height of not less than 400mm is made using channel steel. The curvature of the hatch cover assembly cradle surface should be the same as the curvature of the bulk carrier deck surface.

[0050] S2, synchronously assembling the hatch coaming segments and the hatch cover segments on the hatch cover assembly jig according to the opening accuracy of the hatch on the deck, to obtain the hatch coaming and hatch cover 3.

[0051] Specifically, first, use a total station to measure the dimensions of the four sides of the hatch on the deck and the horizontality of the hatch edge;

[0052] Then, a hatch coaming positioning line 2 is drawn on the tire frame surface of the hatch cover assembly tire frame 1 according to the hatch size and the size of each hatch coaming segment;

[0053] Then, use a total station to measure the levelness of the tire frame surface at the location of the hatch coaming positioning line 2 and determine whether it is equal to the levelness of the hatch edge. If not, add multiple blocks of different heights at the location of the hatch coaming positioning line 2 to adjust its levelness so that its levelness is equal to that of the hatch edge (the deviation between the two levels is within 9 / 1000mm);

[0054] Finally, multiple hatch coaming segments are placed at their corresponding hatch coaming positioning lines 2 for assembly to obtain a hatch coaming. If a hatch coaming positioning line 2 corresponding to a hatch coaming segment is provided with a pad, the hatch coaming segment should be placed on the pad and docked with other hatch coaming segments for assembly.

[0055] When assembling the hatch coaming, the straightness of the side plates should be kept within 4 / 3000mm.

[0056] While the hatch coaming is being assembled, the hatch cover can also be assembled. The hatch cover 3 is assembled from a plurality of plates.

[0057] S3, install pipe fittings on the outer wall of the hatch coaming. After the pipe fittings are installed, perform oil stringing operations and tightness tests on the pipe fittings in turn.

[0058] Specifically, first, measure the distance from the butt joint pipe above the deck, where the pipe and outfitting will be docked, to the deck surface. Based on this distance, draw the pipe and outfitting installation line on the hatch coaming outer wall. The distance from the pipe and outfitting installation line to the cradle surface must be equal to the distance from the butt joint pipe to the deck surface.

[0059] Then, install the pipe and outfitting on the outer wall of the hatch coaming according to the pipe and outfitting installation line.

[0060] After the pipe and outfitting are installed, they are subjected to oil stringing operations, that is, the inlet and outlet of the oil pump are connected to the pipe openings at both ends of the pipe and outfitting through connecting pipes to form an oil injection circuit. At the same time, a filter is installed on the connecting pipe and a vibration pump is placed on the pipe and outfitting. Then, the oil injection pump and the vibration pump are started, and the hydraulic oil of the oil injection pump is injected into the pipe and outfitting through the connecting pipe. At the same time, the vibration pump vibrates off the attachments attached to the inner wall of the pipe and outfitting and discharges them out of the pipe and outfitting together with the hydraulic oil, and then enters the filter for filtration. The hydraulic oil filtered by the filter flows back to the oil injection pump through the connecting pipe. This process is repeated so that the hydraulic oil circulates in the oil injection circuit for the set time.

[0061] After the oil leakage operation of pipes and outfittings is completed, the pipes and outfittings are tested for tightness.

[0062] In this embodiment, the pipe and outfitting parts include hatch cover hydraulic power pipes and cable pipes, among which the hatch cover hydraulic power pipes are used for the oil stringing operation.

[0063] S4, pre-assemble the hatch coaming and the hatch cover 3 to install the hatch cover accessories in place.

[0064] Specifically, first, according to the hatch cover design and construction drawings, draw the installation positioning line of the first part structure of the hatch cover accessories on the hatch cover;

[0065] Then, the first part of the hatch cover attachment structure is installed at the installation positioning line of the hatch cover;

[0066] Then, the hatch cover is pre-installed on the hatch coaming, and an installation positioning line of the second part structure of the hatch cover attachment is drawn on the hatch coaming according to the position of the first part structure of the hatch cover attachment on the hatch cover;

[0067] Finally, install the second part of the hatch cover attachment structure at the installation positioning line of the hatch coaming.

[0068] After the installation of hatch cover accessories is completed, the hatch cover should be initially debugged for opening and closing.

[0069] The hatch cover accessories include a hydraulic power motor and its guide rails and motor base, a hatch cover roller, a clamp, a side guide block, an end positioning block, and an end limiter.

[0070] S6, fix the temporary reinforcement frame on the hatch cover 3.

[0071] The temporary reinforcement frame includes an inner reinforcement rod 6 attached to the inner side of the hatch cover body 4, a diagonal reinforcement rod 7 connecting two adjacent inner reinforcement rods 6, a transverse reinforcement rod 8 connecting two opposite inner reinforcement rods 6, an outer reinforcement rod 9 attached to the inner side of the hatch cover extension beam 5, and a longitudinal reinforcement rod 10 connecting two opposite outer reinforcement rods 9. A lifting ring is provided on the outer reinforcement rod 9. In this embodiment, the lifting ring is in the form of a horse-mounted type.

[0072] The temporary reinforcement frame is used to prevent the hatch cover from being deformed during the lifting process. The temporary reinforcement frame can offset the transverse and longitudinal moments that the hatch cover is subjected to during the lifting process and play an anti-deformation role.

[0073] S7, dock loading phase, the hatch cover and hatch coaming are hoisted onto the ship and installed in place.

[0074] During the dock loading phase, the hatch cover and hatch coaming are simultaneously lifted onto the ship for installation. After the hatch cover and hatch coaming are lifted onto the ship, the hatch coaming is first fixed to the hatch, and then the hatch cover is closed on the hatch coaming and the first part structure of the hatch cover attachment on the hatch cover is aligned with the second part structure of the hatch cover attachment on the hatch coaming.

[0075] It should be understood that the embodiments described are only a portion of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

Claims

1. A method for integrated construction of bulk carrier hatch covers, characterized in that: The specific steps include: S1, a stage of block assembly, wherein a hatch cover assembly cradle is manufactured, wherein the curvature of the hatch cover assembly cradle surface is the same as the curvature of the bulk carrier deck surface; S2, synchronously assembling the hatch coaming segments and the hatch cover segments on the hatch cover assembly jig according to the opening accuracy of the hatch on the deck to obtain the hatch coaming and the hatch cover; S3, install pipe fittings on the outer wall of the hatch coaming. After the pipe fittings are installed, perform oil stringing operations and tightness tests on the pipe fittings in sequence; S4, pre-assemble the hatch coaming and hatch cover to install the hatch cover accessories in place; S6, fix temporary reinforcement frame on hatch cover; S7, dock loading phase, the hatch cover and hatch coaming are hoisted onto the ship and installed in place.

2. The method for integrated construction of bulk carrier hatch covers according to claim 1, characterized in that: The specific steps of assembling the hatch coaming segments on the hatch cover assembly jig in step S2 according to the opening accuracy of the hatch on the deck are as follows: Use a total station to measure hatch dimensions and hatch edge levelness; Draw a hatch coaming positioning line on the carcass surface of the hatch cover assembly carcass according to the hatch size and the size of the hatch coaming segment; Use a total station to measure the levelness of the tire frame surface at the location of the hatch coaming positioning line and determine whether it is equal to the levelness of the hatch edge. If not, adjust the levelness of this location by adding blocks of different heights at the location of the hatch coaming positioning line.

3. The method for integrated construction of bulk carrier hatch covers according to claim 1, characterized in that: The specific steps of installing pipe fittings on the hatch coaming outer wall in step S3 are: Measure the distance from the butt joint pipe to the deck surface above the deck, and draw the pipe and outfitting installation line on the hatch coaming outer wall based on this distance. The distance from the pipe and outfitting installation line to the cradle surface must be equal to the distance from the butt joint pipe to the deck surface. Install the pipe and outfitting fittings on the outer wall of the hatch coaming according to the pipe and outfitting installation line.

4. The method for integrated construction of bulk carrier hatch covers according to claim 1, characterized in that: The specific steps of performing oil-stirring operation on pipes and outfitting in step S3 are as follows: Connect the inlet and outlet of the oil pump to the nozzles at both ends of the pipe fittings through connecting pipes to form an oil injection circuit, and install filters on the connecting pipes; Place a vibration pump on the pipe and outfitting; Start the oil pump and vibration pump, and the hydraulic oil of the oil pump will be injected into the pipe fittings through the connecting pipeline. At the same time, the vibration pump will vibrate off the attachments attached to the inner wall of the pipe fittings and discharge them out of the pipe fittings along with the hydraulic oil, and then enter the filter for filtration. The hydraulic oil after filtering by the filter will flow back to the oil pump through the connecting pipeline. This process is repeated, and the hydraulic oil circulates in the oil feeding circuit for the set time.

5. The method for integrated construction of bulk carrier hatch covers according to claim 1, characterized in that: The specific steps of pre-assembling the hatch coaming and the hatch cover in step S4 to install the hatch cover accessories in place are: According to the hatch cover design and construction drawings, draw the installation positioning line of the first part of the hatch cover accessories on the hatch cover; Install the first part of the hatch cover attachment structure at the installation positioning line of the hatch cover; Pre-install the hatch cover on the hatch coaming, and draw the installation positioning line of the second part of the hatch cover attachment structure on the hatch coaming according to the position of the first part of the hatch cover attachment structure on the hatch cover; Install the second part of the hatch cover attachment structure at the installation positioning line of the hatch coaming.

6. The method for integrated construction of bulk carrier hatch covers according to claim 5, characterized in that: The hatch cover accessories include a hydraulic power motor and its guide rails, hatch cover rollers, a clamp, side guide blocks, end positioning blocks, and end limiters.

7. The method for integrated construction of bulk carrier hatch covers according to claim 1, characterized in that: In the dock loading stage in step S7, the hatch cover and the hatch coaming are simultaneously hoisted onto the ship for installation.

8. The method for integrated construction of bulk carrier hatch covers according to claim 1, characterized in that: The temporary reinforcement frame includes an inner reinforcement bar attached to the inner side of the hatch cover, a diagonal reinforcement bar connecting two adjacent inner reinforcement bars, a transverse reinforcement bar connecting two opposite inner reinforcement bars, an outer reinforcement bar attached to the inner side of the hatch cover extension beam, and a longitudinal reinforcement bar connecting two opposite outer reinforcement bars.

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