Swell capacity compensation device for liquid cargo pipe of chemical tanker and installation method of swell capacity compensation device

Abstract

The invention discloses a chemical tanker liquid cargo pipe swelling capacity compensation device and an installation method thereof, an expansion counteracting device is arranged on a deck, and the expansion counteracting device is used for limiting a liquid cargo pipe and allowing part of pipe sections of the liquid cargo pipe to move in a limited area so as to counteract the swelling capacity of the liquid cargo pipe. The problem that a pipeline system is damaged due to excessive expansion caused by heating of a liquid cargo pipe or deformation of a ship structure is effectively solved, pipeline stress is eliminated, safe operation and use of the pipeline system are guaranteed, the expansion counteracting device is simple in structure and small in occupied space, the position of the expansion counteracting device can be arranged according to pipeline layout, and the pipeline design flexibility is very high.

Description

Technical Field

[0001] The present invention relates to the technical field of shipbuilding, and in particular to a chemical tanker liquid cargo pipe expansion compensation device and an installation method thereof. Background Art

[0002] In order to safely load and unload oil and sail normally, the liquid cargo transfer system is the core cargo handling system for bulk transport of dangerous chemicals. The liquid cargo transfer pipe has the characteristics of long pipelines and high risk. Usually, if the pipeline is too long, an expansion device must be installed to offset the expansion or contraction of the pipeline caused by temperature changes or deformation of the hull structure in real time to ensure that the pipeline system will not be damaged due to excessive expansion and cause dangerous situations. At the same time, due to the particularity of chemical transportation, cleaning and purging, dead corners or low points that can gather liquids must be eliminated in the pipeline, and the pipeline must be as smooth as possible. Traditional sliding expansion joints and other accessories are prohibited from use on chemical ships because of their potential leakage risks. Therefore, measures such as expansion bends have become the most commonly used designs on liquid cargo transfer pipelines.

[0003] However, the expansion bend design has the following defects:

[0004] 1. The deck is densely populated with pipelines. Traditional expansion bends take up a large space, and multiple pipelines need to be coordinated and planned uniformly to achieve a reasonable layout. Therefore, traditional expansion bends will bring great difficulties to pipeline layout, which will increase the area occupied by pipelines on the deck.

[0005] 2. The traditional expansion bend has 4 elbows, which will affect the flow of the medium in the liquid cargo pipe and have a negative impact.

[0006] 3. Traditional expansion bends can only be placed horizontally because there cannot be low points in liquid cargo pipes, which limits the flexibility of pipeline design. Summary of the invention

[0007] In view of this, the present invention provides a chemical tanker liquid cargo pipe expansion compensation device and an installation method thereof, so as to solve the problems existing in the above-mentioned background technology.

[0008] A chemical tanker liquid cargo pipe expansion compensation device, comprising an expansion compensation device, the expansion compensation device is used to restrict the liquid cargo pipe and allow a portion of the liquid cargo pipe to move within its limited area to offset the expansion, the liquid cargo pipe is restricted by at least one group of expansion compensation devices arranged side by side, each group of expansion compensation devices comprises a base, a plurality of expansion force compensation members fixed on the base at equal intervals, the base is connected to a support box foot arranged on the main deck through a plurality of columns;

[0009] The liquid cargo pipe comprises a liquid cargo deep well pump, a liquid cargo longitudinal pipe connected to the liquid cargo deep well pump, a liquid cargo vertical pipe connected to the liquid cargo longitudinal pipe, and a liquid cargo jumper pipe connected to the liquid cargo vertical pipe. The liquid cargo jumper pipe is confined in the expansion compensation device to offset the expansion of the liquid cargo pipe by moving.

[0010] Preferably, the support box feet are arranged on the main deck surface, and their arrangement positions correspond to the longitudinal reinforcement ribs on the reverse side of the main deck.

[0011] Preferably, the supporting box feet include a bulb-flat steel arranged on the main deck and a plurality of supporting feet fixed on the bulb-flat steel, the bulb-flat steel is parallel to the base, each column is correspondingly connected to a supporting foot, each supporting foot includes a horizontal supporting plate vertically fixed on the bulb-flat steel, two column reinforcements vertically fixed to the bottom of the horizontal supporting plate and vertically connected to the bulb-flat steel, and a box foot reinforcement vertically fixed to the main deck and vertically connected to the bulb-flat steel, and the box foot reinforcement is arranged between the two column reinforcements.

[0012] Preferably, the reinforced bottom of the column is not fixed to the main deck, and the reinforced top of the box foot is not fixed to the horizontal support plate.

[0013] Preferably, the column reinforcement and the box foot reinforcement are both triangular plates.

[0014] Preferably, a through hole is opened at the position where the expansion force compensating member is fixed on the base, and the end of the expansion force compensating member passes through the through hole and is locked and fixed by a fastening nut. A limited area is formed in the expansion force compensating member, and the liquid cargo jumper pipe is laid horizontally and passes through the limited area. A sliding pad is arranged between the contact surface of the liquid cargo jumper pipe and the base.

[0015] Preferably, the expansion force offsetting member is a U-shaped structure having two threaded feet, and the spacing between the two threaded feet of the expansion force offsetting member is 1.5-2 times the diameter of the liquid cargo jumper pipe.

[0016] Preferably, the number of expansion force counteracting members in the expansion counteracting device is equal to the number of liquid cargo pipes.

[0017] A method for installing a liquid cargo pipe expansion compensation device for a chemical tanker, specifically comprising the following steps:

[0018] S1, during the stage of deck block construction, at least one support box foot is pre-installed on the main deck. The support foot of the support box foot must correspond to the longitudinal reinforcement ribs on the back side of the main deck. A column is fixed on each support foot of the support box foot and a base is fixed on the support surface formed by multiple columns;

[0019] S2, during the pipe fittings outfitting stage, multiple expansion force compensation parts are installed on each base according to the laying position of the liquid cargo pipe on the main deck;

[0020] S3, install the liquid cargo pipe on each liquid cargo deep well pump in turn, and make the liquid cargo jumper pipe of the liquid cargo pipe pass horizontally through the limited area of ​​the expansion force compensation member. After the liquid cargo pipe is laid, the liquid cargo jumper pipe is locked and fixed by tightening the nut.

[0021] The beneficial effects of the present invention are:

[0022] 1. The present invention arranges an expansion compensation device on the deck, uses the expansion compensation device to limit the liquid cargo pipe and allows part of the liquid cargo pipe to move within its limited area to offset the expansion of the liquid cargo pipe, effectively solves the problem of damage to the pipeline system caused by excessive expansion of the liquid cargo pipe due to heat or deformation of the hull structure, eliminates pipeline stress, and ensures the safe operation and use of the pipeline system. The expansion compensation device has a simple structure and occupies a small space. Its position can be set according to the pipeline layout, and the pipeline design flexibility is very high.

[0023] 2. The present invention has strong versatility and can greatly reduce pipeline planning, construction time and labor costs. It can provide expansion margins for liquid cargo pipes on board in real time, reducing the difficulty of designing and arranging cargo hold deck piping systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. 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 creative work.

[0025] Figure 1 It is a side view of the present invention.

[0026] Figure 2 It is a structural schematic diagram of the expansion compensation device.

[0027] Figure 3 This is a top view of the base.

[0028] Figure 4 It is a structural schematic diagram of the expansion force offsetting member.

[0029] Figure 5 It is a front view of the connection between the column and the support box foot.

[0030] Figure 6 It is a side view of the connection between the column and the support box foot.

[0031] Figure 7 It is a top view of the connection between the column and the support box foot.

[0032] The meanings of the numbers in the figure are:

[0033] 1 is an expansion compensation device, 2 is a base, 21 is a through hole, 3 is a support box foot, 31 is a horizontal support plate, 32 is a column reinforcement, 33 is a box foot reinforcement, 34 is a bulb flat steel, 4 is an expansion force compensation member, 41 is a limited area, 5 is a liquid cargo deep well pump, 6 is a liquid cargo longitudinal pipe, 7 is a liquid cargo vertical pipe, 8 is a liquid cargo jumper pipe, 9 is a sliding pad, 10 is a fastening nut, 11 is a column, and 12 is a main deck. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below by the specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0035] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. The singular forms of "a", "said" and "the" used in this disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0036] 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.

[0037] The present invention provides a device for compensating the expansion of a liquid cargo pipe of a chemical tanker, comprising an expansion compensation device 1, which is used to limit the liquid cargo pipe and allow a part of the pipe section of the liquid cargo pipe to move within its limited area to offset the expansion. The chemical tanker is equipped with multiple cargo tanks, each of which is equipped with a liquid cargo deep well pump 5, and each of the liquid cargo deep well pumps 5 is connected to a liquid cargo pipe. When the liquid cargo pipe is laid upward from the cargo tank, extends out of the deck surface and is laid to the manifold area, all the liquid cargo pipes are arranged in parallel and at equal intervals, and all the liquid cargo pipes are restricted by at least one group of expansion compensation devices 1 arranged side by side. If two or more groups of expansion compensation devices 1 are provided, multiple expansion compensation devices 1 are arranged at intervals along the length direction of the movable pipe section of the liquid cargo pipe located in the limited area.

[0038] The expansion compensation device 1 includes a base 2 and a plurality of expansion force compensation members 4 fixed on the base 2 at equal intervals. The base 2 spans the movable pipe sections (i.e., liquid cargo jumper pipes 8) of all liquid cargo pipes located within a limited area. The number of expansion force compensation members 4 is equal to the number of liquid cargo pipes. The installation positions of the expansion force compensation members 4 on the base 2 correspond one-to-one to the positions of the movable pipe sections (i.e., liquid cargo jumper pipes 8) of the liquid cargo pipes located within the limited area.

[0039] Specifically, a through hole 21 is provided at the position where the expansion force offsetting member 4 is fixed on the base 2, and the end of the expansion force offsetting member 4 passes through the through hole 21 and is locked and fixed by a fastening nut 10, and a limited area 41 is formed in the expansion force offsetting member 4. In this embodiment, the base 2 is made of angle steel, and the expansion force offsetting member 4 is a U-shaped structure with two threaded feet. A U-shaped limited area 41 is formed between the two threaded feet of the expansion force offsetting member 4, and the distance between the two threaded feet of the expansion force offsetting member 4 is 1.5-2 times the diameter of the movable pipe section (i.e., the liquid cargo jumper pipe 8) of the liquid cargo pipe located in the limited area.

[0040] The liquid cargo pipe includes a liquid cargo deep well pump 5, a liquid cargo longitudinal pipe 6 connected to the liquid cargo deep well pump 5, a liquid cargo vertical pipe 7 connected to the liquid cargo longitudinal pipe 6, and a liquid cargo jumper pipe 8 connected to the liquid cargo vertical pipe 7. The liquid cargo jumper pipe 8 is confined in the expansion force offsetting member 4 to offset the expansion of the liquid cargo pipe by moving. The liquid cargo jumper pipe 8 is laid horizontally and passes through the confined area 41. A sliding pad 9 is also provided between the contact surface of the liquid cargo jumper pipe 8 and the base 2.

[0041] The base 2 of each expansion compensation device 1 is connected to a support box foot 3 arranged on the main deck through a plurality of columns 11, and the setting position of the support box foot 3 corresponds to the longitudinal reinforcement rib on the back side of the main deck.

[0042] Specifically, the support box foot 3 includes a bulb flat steel 34 arranged on the main deck, a plurality of support feet fixed on the bulb flat steel 34, the bulb flat steel 34 is parallel to the base 2 (that is, the laying direction of the bulb flat steel 34 is the same as the laying direction of the base 2), each column is correspondingly connected to a support foot, each support foot includes a horizontal support plate 31 vertically fixed on the bulb flat steel 34, two column reinforcements 32 vertically fixed to the bottom of the horizontal support plate 31 and vertically connected to the bulb flat steel 34, and a box foot reinforcement 33 vertically fixed on the main deck and vertically connected to the bulb flat steel 34, and the box foot reinforcement 33 is arranged between the two column reinforcements 32. In this embodiment, the two column reinforcements 32 are respectively located directly below the two opposite sides of the column 11.

[0043] The bottom of the column reinforcement 32 is not fixed to the main deck, and the top of the box foot reinforcement 33 is not fixed to the horizontal support plate 31.

[0044] Preferably, the bottom of the column reinforcement 32 does not contact the main deck, and the top of the box foot reinforcement 33 does not contact the horizontal support plate 31.

[0045] In this embodiment, the column reinforcement 32 and the box foot reinforcement 33 are both triangular plates.

[0046] The present invention also provides a method for installing a chemical tanker liquid cargo pipe expansion compensation device, which specifically comprises the following steps:

[0047] S1, during the stage of deck block construction, at least one support box foot 3 is pre-installed on the main deck, and the support foot of the support box foot 3 must correspond to the longitudinal reinforcement ribs on the back side of the main deck. A column 11 is fixed on each support foot of the support box foot 3, and a base 2 is fixed on the support surface formed by the multiple columns 11;

[0048] S2, pipe fittings outfitting stage, multiple expansion force compensation parts 4 are installed on each base 2 according to the laying position of the liquid cargo pipe on the main deck;

[0049] S3, install the liquid cargo pipe on each liquid cargo deep well pump 5 in turn, and make the liquid cargo jumper pipe 8 of the liquid cargo pipe pass horizontally through the limited area 41 of the expansion force offsetting member 4, and set a sliding pad 9 between the contact surface of the liquid cargo jumper pipe 8 and the base 2. After the liquid cargo pipe is laid, lock the liquid cargo jumper pipe 8 by tightening the nut 10. After the liquid cargo jumper pipe 8 is locked, it should be ensured that the expansion force offsetting member 4 is lightly attached to the liquid cargo jumper pipe 8 (that is, the expansion force offsetting member 4 is in contact with the liquid cargo jumper pipe 8, but the force exerted by the expansion force offsetting member 4 on the liquid cargo jumper pipe 8 is very small, and the liquid cargo jumper pipe 8 is in a state of being subjected to a relatively light force).

[0050] When the liquid cargo pipe expands due to heat (i.e., its liquid cargo longitudinal pipe 6 expands due to heat), the length of the liquid cargo longitudinal pipe 6 expands and stretches slightly. Therefore, the expansion force is transmitted to the liquid cargo jumper pipe 8 through the liquid cargo vertical pipe 7, so that the liquid cargo jumper pipe 8 moves left and right within the limited area 41 of the expansion force offsetting member 4 to offset the expansion force.

[0051] At the same time, the bend between the liquid cargo longitudinal pipe 6 and the liquid cargo vertical pipe 7 will also expand due to heat. When the bend between the liquid cargo longitudinal pipe 6 and the liquid cargo vertical pipe 7 expands due to heat, the expansion force will also be transmitted to the liquid cargo jumper pipe 8, causing the liquid cargo jumper pipe 8 to move left and right within the limited area 41 of the expansion force offsetting member 4 to offset the expansion force.

[0052] It should be clear that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A chemical tanker liquid cargo pipe expansion compensation device, characterized in that: The expansion compensation device (1) is used to restrict the liquid cargo pipe and allow a part of the liquid cargo pipe to move within its limited area to offset the expansion. The liquid cargo pipe is restricted by at least one group of expansion compensation devices (1) arranged side by side. Each group of expansion compensation devices (1) comprises a base (2) and a plurality of expansion force compensation members (4) fixed on the base (2) at equal intervals. The base (2) is connected to a support box foot (3) arranged on the main deck through a plurality of columns (11). The liquid cargo pipe comprises a liquid cargo deep well pump (5), a liquid cargo longitudinal pipe (6) connected to the liquid cargo deep well pump (5), a liquid cargo vertical pipe (7) connected to the liquid cargo longitudinal pipe (6), and a liquid cargo jumper pipe (8) connected to the liquid cargo vertical pipe (7); the liquid cargo jumper pipe (8) is confined in the expansion compensation device (5) to compensate the expansion of the liquid cargo pipe by moving.

2. The chemical tanker liquid cargo pipe expansion compensation device according to claim 1, characterized in that: The support box foot (3) is arranged on the main deck surface, and its arrangement position corresponds to the longitudinal reinforcement ribs on the back side of the main deck.

3. The chemical tanker liquid cargo pipe expansion compensation device according to claim 1 or 2, characterized in that: The support box foot (3) comprises a bulbous flat steel (34) arranged on the main deck, and a plurality of support feet fixed on the bulbous flat steel (34), wherein the bulbous flat steel (34) is parallel to the base (2), and each column is correspondingly connected to a support foot, and each support foot comprises a horizontal support plate (31) vertically fixed on the bulbous flat steel (34), two column reinforcements (32) vertically fixed to the bottom of the horizontal support plate (31) and vertically connected to the bulbous flat steel (34), and a box foot reinforcement (33) vertically fixed on the main deck and vertically connected to the bulbous flat steel (34), and the box foot reinforcement (33) is arranged between the two column reinforcements (32).

4. The chemical tanker liquid cargo pipe expansion compensation device according to claim 3, characterized in that: The bottom of the column reinforcement (32) is not fixed to the main deck, and the top of the box foot reinforcement (33) is not fixed to the horizontal support plate (31).

5. The chemical tanker liquid cargo pipe expansion compensation device according to claim 4, characterized in that: The column reinforcement (32) and the box foot reinforcement (33) are both triangular plates.

6. The chemical tanker liquid cargo pipe expansion compensation device according to claim 1, characterized in that: A through hole (21) is provided on the base (2) at a position where the expansion force offsetting member (4) is fixed. The end of the expansion force offsetting member (4) passes through the through hole (21) and is locked and fixed by a fastening nut (10). A limited area (41) is formed in the expansion force offsetting member (4). The liquid cargo jumper tube (8) is horizontally laid and passes through the limited area (41). A sliding pad (9) is provided between the contact surface between the liquid cargo jumper tube (8) and the base (2).

7. The chemical tanker liquid cargo pipe expansion compensation device according to claim 6, characterized in that: The expansion force offsetting member (4) is a U-shaped structure having two threaded legs, and the distance between the two threaded legs of the expansion force offsetting member (4) is 1.5-2 times the diameter of the liquid cargo jumper tube (8).

8. The chemical tanker liquid cargo pipe expansion compensation device according to claim 1, characterized in that: The number of expansion force offsetting members (4) in the expansion offsetting device (1) is equal to the number of liquid cargo pipes.

9. A method for installing a liquid cargo pipe expansion compensation device for a chemical tanker according to any one of claims 1 to 8, characterized in that: The specific steps include: S1, during the stage of deck block construction, at least one support box foot (3) is pre-installed on the main deck, the support foot of the support box foot (3) must correspond to the longitudinal reinforcement ribs on the back side of the main deck, a column (11) is fixed on each support foot of the support box foot (3), and a base (2) is fixed on the support surface formed by the multiple columns (11); S2, pipe fittings outfitting stage, a plurality of expansion force compensation parts (4) are installed on each base (2) according to the laying position of the liquid cargo pipe on the main deck; S3, install the liquid cargo pipe on each liquid cargo deep well pump (5) in turn, and make the liquid cargo jumper pipe (8) of the liquid cargo pipe horizontally pass through the limited area (41) of the expansion force compensation member (4). After the liquid cargo pipe is laid, the liquid cargo jumper pipe (8) is locked and fixed by tightening the nut (10).

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