Chemical tanker liquid cargo pipe expansion amount compensation device and installation method thereof

Abstract

The application discloses a chemical tanker liquid cargo pipe expansion amount compensation device and a mounting method thereof. The expansion amount compensation device is arranged on a deck, and is used for limiting a liquid cargo pipe and allowing partial pipe sections of the liquid cargo pipe to move in a limited area of the liquid cargo pipe to compensate for the expansion amount of the liquid cargo pipe, so that the problem of damage of a pipeline system caused by excessive expansion of the liquid cargo pipe due to heat or deformation of a ship body structure is effectively solved, pipeline stress is eliminated, safe operation and use of the pipeline system are ensured, the expansion amount compensation device has simple structure and small space occupation, the position of the expansion amount compensation device can be arranged according to pipeline layout, and pipeline design flexibility is very high.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding technology, and in particular to a chemical tanker cargo pipe expansion compensation device and its installation method. Background Technology

[0002] For bulk chemical transport tankers to safely load and unload oil and navigate normally, the liquid cargo barge system is the core of the cargo handling system. Liquid cargo barge pipelines are characterized by their long length and high risk. Typically, due to the excessive length of the pipeline, expansion devices must be installed to compensate for the expansion or contraction caused by temperature changes or hull structural deformation, ensuring that the pipeline system is not damaged by excessive expansion and avoids dangerous situations. Furthermore, due to the special nature of chemical transportation, cleaning, and purging, dead spots or low points where liquid can accumulate must be eliminated within the pipeline, and the pipeline must be kept as clear as possible. Traditional sliding expansion joints and similar accessories are prohibited on chemical tankers due to their potential leakage risks. Therefore, expansion bends and similar measures have become the most common design features in liquid cargo barge pipelines.

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

[0004] 1. The deck is densely covered with pipes. Traditional expansion bends occupy a lot of space, and multiple pipelines need to be coordinated and planned in a unified manner to achieve a reasonable layout. Therefore, traditional expansion bends will bring great difficulties to the pipeline layout, which will increase the area occupied by pipelines on the deck.

[0005] 2. Traditional expansion bends have four bends, which can affect the flow of the medium in the liquid cargo pipe and have a negative impact.

[0006] 3. Traditional expansion bends, because liquid cargo pipes cannot have a low point, can only be placed horizontally, which limits the flexibility of pipeline design. Summary of the Invention

[0007] In view of this, the present invention provides a chemical tanker cargo pipe expansion compensation device and its installation method to solve the problems existing in the background art.

[0008] An expansion compensation device for a cargo pipe of a chemical tanker includes an expansion offset device for limiting the cargo pipe and allowing a portion of the cargo pipe to move within its defined area to offset the expansion. The cargo pipe is limited by at least one set of expansion offset devices arranged side by side. Each set of expansion offset devices includes a base and multiple expansion force offsetting elements fixed at equal intervals on the base. The base is connected to a support box foot set on the main deck by multiple columns.

[0009] The cargo pipeline includes a cargo deep well pump, a cargo longitudinal pipe connected to the cargo deep well pump, a cargo vertical pipe connected to the cargo longitudinal pipe, and a cargo crossover pipe connected to the cargo vertical pipe. The cargo crossover pipe is confined within an expansion offset device to offset the expansion of the cargo pipeline by means of movement.

[0010] Preferably, the support box feet are set on the main deck surface, and their setting position corresponds to the longitudinal reinforcing ribs on the reverse side of the main deck.

[0011] Preferably, the support box foot includes a bulb flat steel set on the main deck and a plurality of support feet fixed on the bulb flat steel. The bulb flat steel is parallel to the base. Each column is connected to a corresponding support foot. Each support foot includes a horizontal support plate vertically fixed on the bulb flat steel, two column reinforcements vertically fixed to the bottom of the horizontal support plate and vertically connected to the bulb flat steel, and a box foot reinforcement vertically fixed on the main deck and vertically connected to the bulb flat steel. The box foot reinforcement is located between the two column reinforcements.

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

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

[0014] Preferably, a through hole is provided at the position where the expansion force counteracting component is fixed on the base. The end of the expansion force counteracting component passes through the through hole and is locked and fixed by a fastening nut. A defined area is formed inside the expansion force counteracting component. The liquid cargo cross-connector is laid horizontally and passes through the defined area. A sliding pad is provided between the contact surface of the liquid cargo cross-connector and the base.

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

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

[0017] A method for installing a compensation device for expansion of cargo pipe on a chemical tanker includes the following steps:

[0018] S1, the deck section construction stage, at least one support box foot is pre-installed on the main deck. The support feet of the support box foot must correspond to the longitudinal stiffeners on the reverse 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 fitting outfitting stage, multiple expansion force countermeasures are installed on each base according to the laying position of the liquid cargo pipe on the main deck;

[0020] S3, install the cargo pipes on each cargo deep well pump in sequence, and make the cargo jumper of the cargo pipe pass horizontally through the limited area of ​​the expansion force counteracting component. After the cargo pipes are laid, lock and fix the cargo jumper by tightening the nuts.

[0021] The beneficial effects of this invention are:

[0022] 1. This invention solves the problem of damage to the pipeline system caused by excessive expansion of the cargo pipe due to heat or deformation of the ship structure by setting an expansion offset device on the deck. The expansion offset device restricts the cargo pipe and allows a portion of the cargo pipe to move within its defined area to offset the expansion of the cargo pipe. It eliminates pipeline stress, ensures the safe operation and use of the pipeline system, and the expansion offset device has a simple structure, occupies little space, and can be positioned according to the pipeline layout, making the pipeline design very flexible.

[0023] 2. This invention is highly versatile and can greatly reduce pipeline planning, construction time and labor costs. It can provide expansion margin to liquid cargo pipes on board in real time, reducing the difficulty of designing and arranging cargo hold deck piping systems. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

[0026] Figure 2 This is a schematic diagram of the expansion offset device.

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

[0028] Figure 4 This is a schematic diagram of the expansion force counteracting component.

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

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

[0031] Figure 7 This is a top view showing the connection between the column and the support box feet.

[0032] The meanings of the labels in the diagram are as follows:

[0033] 1 is an expansion countermeasure 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 countermeasure component; 41 is a defined 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 crossover pipe; 9 is a sliding pad; 10 is a fastening nut; 11 is a column; 12 is the main deck. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

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

[0036] To better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings.

[0037] This invention provides a chemical tanker cargo pipe expansion compensation device, including an expansion offset device 1. The expansion offset device 1 is used to restrict the cargo pipe and allow a portion of the cargo pipe to move within its defined area to offset the expansion. The chemical tanker is equipped with multiple cargo holds, each of which is equipped with a cargo deep well pump 5. Each cargo deep well pump 5 is connected to a cargo pipe. When the cargo pipe is laid upwards from the cargo hold, extending beyond the deck surface and reaching the manifold area, all the cargo pipes are arranged in parallel at equal intervals. All the cargo pipes are restricted by at least one set of side-by-side expansion offset devices 1. If two or more sets of expansion offset devices 1 are provided, the multiple expansion offset devices 1 are spaced apart along the length of the movable section of the cargo pipe located within the defined area.

[0038] Each expansion offset device 1 includes a base 2 and multiple expansion force offsetting elements 4 fixed at equal intervals on the base 2. The base 2 spans all movable pipe sections (i.e., liquid cargo cross-connecting pipes 8) within the defined area of ​​the liquid cargo pipes. The number of expansion force offsetting elements 4 is equal to the number of liquid cargo pipes. The installation position of the expansion force offsetting elements 4 on the base 2 corresponds one-to-one with the position of the movable pipe section (i.e., liquid cargo cross-connecting pipe 8) within the defined area of ​​the liquid cargo pipe.

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

[0040] The cargo pipeline includes a cargo deep well pump 5, a cargo longitudinal pipe 6 connected to the cargo deep well pump 5, a cargo vertical pipe 7 connected to the cargo longitudinal pipe 6, and a cargo crossover pipe 8 connected to the cargo vertical pipe 7. The cargo crossover pipe 8 is confined within an expansion force counteracting member 4 to counteract the expansion of the cargo pipeline by means of movement. The cargo crossover pipe 8 is laid horizontally and passes through the confined area 41, and a sliding pad 9 is also provided between the contact surface of the cargo crossover pipe 8 and the base 2.

[0041] The base 2 of each expansion countermeasure device 1 is connected to the support box foot 3 set on the main deck through multiple columns 11. The position of the support box foot 3 corresponds to the longitudinal reinforcing rib on the reverse side of the main deck.

[0042] Specifically, the supporting frame foot 3 includes a bulb flat steel 34 mounted on the main deck and multiple supporting feet fixed to the bulb flat steel 34. The bulb flat steel 34 is parallel to the base 2 (i.e., the laying direction of the bulb flat steel 34 is the same as the laying direction of the base 2). Each column is connected to a corresponding supporting foot. Each supporting foot includes a horizontal support plate 31 vertically fixed to 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 frame foot reinforcement 33 vertically fixed to the main deck and vertically connected to the bulb flat steel 34. The frame foot reinforcement 33 is located between the two column reinforcements 32. In this embodiment, the two column reinforcements 32 are 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, both the column reinforcement 32 and the box foot reinforcement 33 are triangular plates.

[0046] This invention also provides a method for installing a compensation device for the expansion of a cargo pipe on a chemical tanker, specifically including the following steps:

[0047] S1, the deck section construction stage, at least one support box foot 3 is pre-installed on the main deck. The support feet of the support box foot 3 must correspond to the longitudinal reinforcing ribs on the reverse 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 multiple columns 11.

[0048] S2, during the fitting outfitting stage, multiple expansion force countermeasures 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 cargo pipes on each cargo deep well pump 5 in sequence, and make the cargo jumper 8 of the cargo pipe pass horizontally through the limited area 41 of the expansion force counteracting member 4. A sliding pad 9 is set between the contact surface of the cargo jumper 8 and the base 2. After the cargo pipe is laid, lock the cargo jumper 8 with the fastening nut 10. After the cargo jumper 8 is locked, it should be ensured that the expansion force counteracting member 4 is lightly attached to the cargo jumper 8 (that is, the expansion force counteracting member 4 is in contact with the cargo jumper 8, but the force exerted by the expansion force counteracting member 4 on the cargo jumper 8 is very small, and the cargo jumper 8 is in a state of light stress).

[0050] When the cargo pipe is heated and expands (i.e., its longitudinal cargo pipe 6 is heated and expands), the length of the longitudinal cargo pipe 6 expands and elongates slightly. Therefore, the expansion force is transmitted through the vertical cargo pipe 7 to the cargo crossover pipe 8, causing the cargo crossover pipe 8 to move left and right within the limited area 41 of the expansion force counteracting member 4 to counteract the expansion force.

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

[0052] It should be understood that the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

Claims

1. A chemical tanker cargo pipe expansion compensation device, characterized in that, Includes an expansion offset device (1), which is used to limit the liquid cargo pipe and allow a portion of the liquid cargo pipe to move within its defined area to offset the expansion. The liquid cargo pipe is limited by at least one set of expansion offset devices (1) arranged side by side. Each set of expansion offset devices (1) includes a base (2) and multiple expansion force offsetting elements (4) fixed at equal intervals on the base (2). The base (2) is connected to the support box feet (3) set on the main deck by multiple columns (11). The cargo pipeline includes a cargo deep well pump (5), a cargo longitudinal pipe (6) connected to the cargo deep well pump (5), a cargo vertical pipe (7) connected to the cargo longitudinal pipe (6), and a cargo crossover pipe (8) connected to the cargo vertical pipe (7). The cargo crossover pipe (8) is confined within an expansion offset device (1) to offset the expansion of the cargo pipeline by means of movement. A through hole (21) is provided at the position where the expansion force counteracting component (4) is fixed on the base (2). The end of the expansion force counteracting component (4) passes through the through hole (21) and is locked and fixed by a fastening nut (10). A defined area (41) is formed inside the expansion force counteracting component (4). The liquid cargo cross-connector (8) is laid horizontally and passes through the defined area (41). A sliding pad (9) is provided between the contact surface of the liquid cargo cross-connector (8) and the base (2). The expansion force counteractor (4) is a U-shaped structure with two threaded feet, and the distance between the two threaded feet of the expansion force counteractor (4) is 1.5-2 times the diameter of the liquid cargo cross-connector (8).

2. The chemical tanker cargo pipe expansion compensation device according to claim 1, characterized in that, The support box feet (3) are set on the main deck surface, and their setting position corresponds to the longitudinal reinforcing ribs on the reverse side of the main deck.

3. The chemical tanker cargo pipe expansion compensation device according to claim 1 or 2, characterized in that, The supporting box foot (3) includes a bulb flat steel (34) set on the main deck and multiple supporting feet fixed on the bulb flat steel (34). The bulb flat steel (34) is parallel to the base (2). Each column is connected to a supporting foot. Each supporting 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). The box foot reinforcement (33) is located between the two column reinforcements (32).

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

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

7. A method for installing a chemical tanker cargo pipe expansion compensation device according to any one of claims 1-6, characterized in that, Specifically, the following steps are included: S1, the deck section construction stage, 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 stiffener on the reverse 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 multiple columns (11). S2, during the fitting outfitting stage, multiple expansion force countermeasures (4) are installed on each base (2) according to the laying position of the liquid cargo pipe on the main deck. S3, install the cargo pipes on each cargo deep well pump (5) in sequence, and make the cargo pipe crossover pipe (8) pass horizontally through the limited area (41) of the expansion force counteracting component (4). After the cargo pipes are laid, lock and fix the cargo crossover pipe (8) by tightening the fastening nut (10).

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