A temporary sealing method for pipes used for water docking

Abstract

The present invention discloses a temporary sealing method for pipes and tunnels for docking on water, comprising the following steps: designing through plates and patching plates for temporarily sealing the pipes and tunnels according to the structure of the pipes and tunnels; using nesting software to nest the through plates and patching plates, and then cutting them; first installing the through plates and patching plates in the middle of the pipes and tunnels at a position 50 mm away from the end of the segment from the opening at the end of the segment, and then installing the through plates and patching plates on both sides of the pipes and tunnels to form a temporary sealing plate for the pipes and tunnels; and testing the tightness of the temporary sealing plates. The present invention welds and fixes the temporary sealing plates inside the pipes and tunnels to achieve temporary sealing of the pipes and tunnels, which not only does not damage the original profile structure of the ship, but also ensures that the temporary sealing plates of the pipes and tunnels do not affect the assembly positioning between the ring segments, thereby ensuring the positioning and assembly accuracy of docking on water.

Description

Technical Field

[0001] The present invention relates to the technical field of shipbuilding, and in particular to a temporary sealing method for pipes used for water docking. Background Art

[0002] The tunnel is typically located in the center of the ship's bottom and consists of the inner bottom plating, outer plating, longitudinal girders, and profiles, extending from the stern to the bow. During shipbuilding, temporary sealing of the tunnel is necessary for operations such as raising and lowering sections or half-ships. This prevents water from entering the tunnel, corroding the internal piping and valves, and also avoids subsequent cleaning. A common temporary sealing solution for tunnels involves welding 20mm thick steel plates, approximately 50mm thicker than the outer edges of the tunnel, directly to the inner bottom plating, outer plating, and longitudinal girders at the ends of the sections and outside the tunnel. When the total weight of the ring sections is high, multi-island construction cannot be achieved using jacking or transfer trolleys. Instead, the dock must be lowered to float the sections, allowing for on-water docking using the buoyancy of the water and the pull of a pump. However, on-water docking requires precise positioning and assembly of the ring sections; otherwise, any gaps that are out of tolerance after landing will be impossible to adjust. At this time, if the conventional pipe channel sealing solution is still used, there will be at least 40mm gap between the ring segments, which cannot meet the assembly positioning requirements. Therefore, it is urgent to find a temporary sealing method for the pipe channel for water docking, which can not only ensure the temporary sealing of the pipe channel, but also ensure that the temporary sealing of the pipe channel does not affect the assembly positioning between the ring segments, so as to smoothly implement the water docking. Summary of the Invention

[0003] In view of this, the present invention provides a temporary sealing method for pipes used for water docking, so as to solve the problems existing in the above-mentioned background technology.

[0004] A temporary sealing method for pipes used for water docking, specifically comprising the following steps:

[0005] S1, design the through-plate and patching plate for temporary blocking of the tunnel according to the tunnel structure;

[0006] The tunnel is composed of an outer plate, an inner bottom plate, longitudinal girders and profiles. A plurality of longitudinal girders are vertically arranged between the outer plate and the inner bottom plate, and profiles are vertically fixed on the outer plate, the inner bottom plate and the longitudinal girders.

[0007] The shape and size of the through-plate match the shape and size of the pipe port surrounded by the outer plate, inner bottom plate, longitudinal girder and profile. The through-plate is provided with a plurality of through-holes corresponding to the positions of the profiles. The through-holes are hook-shaped and the direction of the hooks is opposite to the direction of the ball heads of the profiles.

[0008] The patch plate is formed with a clamping hole having the same shape as the profile;

[0009] S2, use nesting software to nest the through-plate and the patch plate, and then perform cutting;

[0010] S3: Install the through-plate and patch plate in the middle of the tunnel from the opening at the end of the segment to the inside of the segment at a position 50 mm away from the end of the segment. Then install the through-plate and patch plate on both sides of the tunnel to form a temporary cover plate for the tunnel.

[0011] S4, testing the tightness of the temporary sealing plate.

[0012] Preferably, the specific steps of installing the through-plate and the patch plate in step S3 are:

[0013] First, pull the through-plate in the middle of the pipe from the opening at the end of the segment to a position 50mm away from the end of the segment inside the segment. Each profile passes through the corresponding through hole on the through-plate, and the ball head of each profile faces in the opposite direction of the hook of its corresponding through hole.

[0014] Then, pull the patch plate from the opening at the end of the segment into the interior of the segment until it fits with the through plate, and pass the profile through the clamping hole of the patch plate;

[0015] Then, assemble the through plates and patch plates on both sides of the pipe in place according to the above method;

[0016] Finally, the installation accuracy of all through-plates and patch plates is inspected. After the accuracy inspection is passed, the joints between the through-plates and the outer plates, inner bottom plates and longitudinal girders are welded, and the gaps between the through-plates and patch plates and the profiles are welded.

[0017] Preferably, after the patch is installed, there is a 3mm gap between the profile and the clamping hole.

[0018] Preferably, after the patch is installed, there is a 50 mm distance between the outer contour line of the patch and the contour line of the through hole.

[0019] Preferably, the through hole consists of an elongated hole and a spherical hole connected to the elongated hole. When the through plate is installed, the free edge of the elongated hole of the through hole is flush with the end of the web of the profile, and the minimum distance between the contour line of the spherical hole and the contour of the ball head of the profile is 35 mm.

[0020] Preferably, in step S4, the tightness of the temporary sealing plate is tested by a water flushing test.

[0021] Preferably, the diameter of the water pipe used in the flushing test is not less than 12 mm, the water pressure is at least 0.2 MPa, and the distance between the water outlet of the water pipe and the temporary sealing plate is not more than 1.5 m.

[0022] The beneficial effects of the present invention are:

[0023] The present invention welds and fixes the temporary sealing plate inside the tunnel, which not only does not require disconnecting the profiles that pass through the tunnel, and will not cause damage to the original profile structure of the ship, but also can ensure the temporary sealing of the tunnel, ensure that the temporary sealing plate of the tunnel will not affect the assembly positioning between the ring segments, ensure that the ring segments can be smoothly connected on the water, and ensure the positioning and assembly accuracy of the on-water docking. At the same time, it can also save resources and improve the construction efficiency of the ship. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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.

[0025] Figure 1 This is a structural diagram of the segmented end face pipe.

[0026] Figure 2 This is a schematic diagram of the installation of a temporary cover.

[0027] Figure 3 This is a schematic diagram of the structure of the first through-plate.

[0028] Figure 4 Schematic diagram of the structure of the second through-plate.

[0029] Figure 5 Schematic diagram of the structure of the patch board.

[0030] The meanings of the numbers in the figure are:

[0031] 1 is the through plate, 2 is the patch plate, 3 is the through hole, 4 is the clamping hole, 5 is the outer plate, 6 is the inner bottom plate, 7 is the longitudinal girder, and 8 is the profile. DETAILED DESCRIPTION

[0032] In order to better understand the technical solution of the present invention, the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0033] 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.

[0034] The present application is further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0035] In order to ensure the precise positioning and assembly requirements of the water docking, the temporary sealing plate of the pipe tunnel cannot be directly welded to the end of the segment. Therefore, it is considered to set the temporary sealing plate inside the pipe tunnel.

[0036] When a temporary sealing plate is designed inside the pipeline, since there is a through profile inside the pipe, if the profile is disconnected to install the temporary sealing plate, it is necessary to disconnect it for a certain length according to the requirements of the classification society's regulations, which will affect the pipe system, valves and other outfitting parts inside the pipe.

[0037] The present invention provides a temporary sealing method for pipes used for on-water docking. This method welds and fixes the temporary sealing plate inside the pipe. Not only does it not require disconnecting the profiles that pass through the inside of the pipe, but it also ensures the temporary sealing of the pipe, ensures that the temporary sealing plate of the pipe does not affect the assembly positioning between the ring segments, and ensures that the ring segments can be smoothly docked on-water.

[0038] Specifically, the temporary sealing method for pipes and tunnels for water docking of the present invention comprises the following steps:

[0039] S1, according to the tunnel structure design, is used to temporarily block the tunnel with the through plate 1 and the patch plate 2.

[0040] The tunnel is composed of an outer plate 5, an inner bottom plate 6, a longitudinal girder 7 and a profile 8. A plurality of longitudinal girders 7 are vertically arranged between the outer plate 5 and the inner bottom plate 6. Profiles 8 are vertically fixed on the outer plate 5, the inner bottom plate 6 and the longitudinal girder 7.

[0041] The shape and size of the through-plate 1 match the shape and size of the pipe port surrounded by the outer plate 5, the inner bottom plate 6, the longitudinal girder 7 and the profile 8. The through-plate 1 is provided with a plurality of through-holes 3 corresponding to the positions of the profiles. The through-holes 3 are hook-shaped and their hook directions are opposite to the direction of the ball heads of the profiles 8. Specifically, the size of the through-plate 1 is 5 mm smaller than that of the pipe port, and the through-holes 3 are hook-shaped holes consisting of an elongated hole and a spherical hole connected to the elongated hole. In this embodiment, two types of through-plates 1 are designed according to the different arrangements of the profiles. One type of through-plate has through-holes on the top, bottom and left sides. Figure 3 Another through-plate has through holes on the upper, lower, left and right sides, as shown. Figure 4 shown.

[0042] In this embodiment, the profile 8 is a bulb flat steel, which is composed of a flat web and a spherical ball head.

[0043] The patch plate 2 is used to seal the through hole 3 on the through plate 1 . The outer contour of the patch plate 2 is the same as the shape of the through hole 3 , and a clamping hole 4 with the same shape as the profile 8 is formed on the inner side of the patch plate 2 .

[0044] S2, use nesting software to nest the through plate 1 and the patch plate 2, and then perform cutting.

[0045] According to the number of through plates and patch plates required to form the temporary sealing plate of the pipe, the through plates 1 and patch plates 2 are numbered. Figure 2 As shown, there are 4 through-plates 1, namely 2 GNFB-1s, 1 GNFB-2, and 1 GNFB-3; there are 26 patch plates 2, namely 8 GNFB-4s, 8 GNFB-5s, 4 GNFB-6s, and 6 GNFB-7s.

[0046] S3, first install the through-plates (GNFB-2 and GNFB-3) and the patch plates (GNFB-7, GNFB-5 and GNFB-4) in the middle of the tunnel from the opening at the end of the segment at a position 50 mm away from the end of the segment inside the segment, and then install the through-plates (GNFB-1) and the patch plates (GNFB-4, GNFB-5 and GNFB-6) on both sides of the tunnel to form a temporary sealing plate for the tunnel.

[0047] The specific steps for installing penetration plates and patch plates are as follows:

[0048] First, pull the through-plates (GNFB-2 and GNFB-3) in the middle of the pipe from the opening at the end of the segment to a position 50 mm away from the end of the segment inside the segment. Each profile passes through the corresponding through hole 3 on the through-plate, and the ball head of each profile 8 is oriented opposite to the direction of the hook of its corresponding through hole 3. After the through-plate 1 is installed, the free edge of the elongated hole of the through hole 3 is flush with the end of the web of the profile 8, and the minimum distance between the outline of the spherical hole and the outline of the ball head of the profile 8 is 35 mm.

[0049] Then, pull the patch plates (GNFB-7, GNFB-5, and GNFB-4) through the opening at the end of the segment into the interior of the segment until they fit against the through-plate 1, and pass the profile 8 through the patch plate's retaining hole 4. After the patch plate 2 is installed, there is a 3mm gap between the profile 8 and the retaining hole 4, and a 50mm gap between the outer contour of the patch plate 2 and the contour of the through-hole 3.

[0050] Then, assemble the through-plate (GNFB-1) and the patch plates (GNFB-4, GNFB-5 and GNFB-6) on both sides of the tunnel into place according to the above method.

[0051] Finally, check the installation accuracy of all through-plates 1 and patch plates 2. After passing the accuracy inspection, weld the joints between the through-plate 1 and the outer plate 5, the inner bottom plate 6 and the longitudinal girder 7, and weld the gaps between the through-plate 1 and patch plate 2 and the profile 8.

[0052] S4, testing the tightness of the temporary sealing plate.

[0053] Preferably, the tightness of the temporary sealing plate is tested through a flushing test. The water pipe used in the flushing test has a diameter of no less than 12 mm, a water pressure of at least 0.2 MPa, and a distance of no more than 1.5 m (preferably about 1 m) between the water pipe outlet and the temporary sealing plate. One inspector flushes the welds of the temporary sealing plate of the pipe channel from the segmented joint end, while another inspector inspects the inside of the opposite pipe channel to check for leaks and verify that the sealing performance meets the requirements.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A temporary sealing method for pipes used for water docking, characterized in that: The specific steps include: S1, design the through-plate and patching plate for temporary blocking of the tunnel according to the tunnel structure; The tunnel is composed of an outer plate, an inner bottom plate, longitudinal girders and profiles. A plurality of longitudinal girders are vertically arranged between the outer plate and the inner bottom plate, and profiles are vertically fixed on the outer plate, the inner bottom plate and the longitudinal girders. The shape and size of the through-plate match the shape and size of the pipe port surrounded by the outer plate, inner bottom plate, longitudinal girder and profile. The through-plate is provided with a plurality of through-holes corresponding to the positions of the profiles. The through-holes are hook-shaped and the direction of the hooks is opposite to the direction of the ball heads of the profiles. The patch plate is formed with a clamping hole having the same shape as the profile; S2, use nesting software to nest the through-plate and the patch plate, and then perform cutting; S3: Install the through-plate and patch plate in the middle of the tunnel from the opening at the end of the segment to the inside of the segment at a position 50 mm away from the end of the segment. Then install the through-plate and patch plate on both sides of the tunnel to form a temporary cover plate for the tunnel. S4, testing the tightness of the temporary sealing plate.

2. The temporary sealing method for pipes and tunnels for water docking according to claim 1 is characterized in that: The specific steps for installing the through-plate and the patch plate in step S3 are as follows: First, pull the through-plate in the middle of the pipe from the opening at the end of the segment to a position 50mm away from the end of the segment inside the segment. Each profile passes through the corresponding through hole on the through-plate, and the ball head of each profile faces in the opposite direction of the hook of its corresponding through hole. Then, pull the patch plate from the opening at the end of the segment into the interior of the segment until it fits with the through plate, and pass the profile through the clamping hole of the patch plate; Then, assemble the through plates and patch plates on both sides of the pipe in place according to the above method; Finally, the installation accuracy of all through-plates and patch plates is inspected. After the accuracy inspection is passed, the joints between the through-plates and the outer plates, inner bottom plates and longitudinal girders are welded, and the gaps between the through-plates and patch plates and the profiles are welded.

3. The temporary sealing method for pipes and tunnels for water connection according to claim 2, characterized in that: After the patch is installed, there is a 3mm gap between the profile and the clamping hole.

4. The temporary sealing method for pipes and tunnels for water connection according to claim 2, characterized in that: After the patch plate is installed, there is a 50 mm gap between the outer contour line of the patch plate and the contour line of the through hole.

5. The temporary sealing method for pipes and tunnels for water connection according to claim 1, characterized in that: The through hole consists of a long hole and a spherical hole connected to the long hole. When the through plate is installed, the free edge of the long hole of the through hole is flush with the end of the web of the profile, and the minimum distance between the outline of the spherical hole and the outline of the ball head of the profile is 35mm.

6. The temporary sealing method for pipes and tunnels for water connection according to claim 1, characterized in that: In step S4, the tightness of the temporary sealing plate is tested by a water flushing test.

7. The temporary sealing method for pipes and tunnels for water connection according to claim 6, characterized in that: The diameter of the water pipe used in the flushing test shall not be less than 12mm, the water pressure shall be at least 0.2MPa, and the distance between the water pipe outlet and the temporary sealing plate shall not exceed 1.5m.

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