CN112550632B - Method for installing and positioning pump well of Mark III type LNG fuel tank - Google Patents

Method for installing and positioning pump well of Mark III type LNG fuel tank Download PDF

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Publication number
CN112550632B
CN112550632B CN202011415726.3A CN202011415726A CN112550632B CN 112550632 B CN112550632 B CN 112550632B CN 202011415726 A CN202011415726 A CN 202011415726A CN 112550632 B CN112550632 B CN 112550632B
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positioning
pump well
installing
hole
positioning device
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CN112550632A (en
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李明策
严磊
刘海洋
吴松
张欣
赵治坤
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Hudong Zhonghua Shipbuilding Group Co Ltd
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Hudong Zhonghua Shipbuilding Group Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
    • B63B73/20—Building or assembling prefabricated vessel modules or parts other than hull blocks, e.g. engine rooms, rudders, propellers, superstructures, berths, holds or tanks

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The invention discloses a method for installing and positioning a pump well of a Mark III type LNG fuel tank, which comprises the following steps: installing a pump well in a pump well open hole, wherein a pump well installation line is marked in advance on a bottom ship plate at the periphery of the pump well open hole; assembling a pump well positioning device; installing a pump well positioning device on a pump well; a positioning ruler is vertically inserted into each positioning groove of the pump well positioning device, and the bottom edge of the positioning ruler is abutted against the bottom plate of the ship; and moving the pump well positioning device until all the positioning rules coincide with the pump well installation line, and at the moment, installing the pump well in place. The invention can quickly adjust and position the installation position of the pump well by utilizing the pump well positioning device, improves the installation precision of the pump well and ensures the construction quality of the ship.

Description

Method for installing and positioning pump well of Mark III type LNG fuel tank
Technical Field
The invention relates to the technical field of ship construction, in particular to a method for installing and positioning a pump well of a Mark III type LNG fuel tank.
Background
With the development of science and technology and the improvement of quality of life, people pay more and more attention to the protection of the environment. SO generated after burning fuel oil, coal mine and other old brand fuelsXAnd NOXThe liquefied natural gas is always a subject of people's problems, and the product after the liquefied natural gas is completely combusted is only water and carbon dioxide, so that the liquefied natural gas is a clean, efficient and cheap alternative green fuel, and is more and more popular. Meanwhile, the International Maritime Organization (IMO) has gradually improved the standard of ship tail gas emission, and the traditional two-stroke diesel host is not limited by fuel, so that the scene is not changed, and many shippers turn the attention to the dual-fuel host which can use traditional fuel oil and diesel oil as fuel and can use more environment-friendly LNG as fuel.
In order to meet the normal operation of the dual-fuel main engine in the gas mode, the gas supply system needs to be more uniform and stable, and therefore a pump well needs to be added in the LNG fuel tank. The pump well is located near the pump tower base at the bottom of the fuel tank, is located under the fuel pump and is relatively low in position, so that the interior can be filled with LNG all the time, and the LNG can be pumped by the fuel pump conveniently. However, the fuel pump needs to be fixed on the pump tower through a bracket, and the adjustable range is small, so that the mounting precision of the fuel pump to the pump well is high, and the positioning is extremely accurate.
Disclosure of Invention
In view of the above, the present invention provides a method for installing and positioning a pump well of a Mark iii type LNG bunker, so as to solve the problems in the background art.
A method for installing and positioning a pump well of a Mark III type LNG fuel tank specifically comprises the following steps:
s1, installing the pump well in the pump well open hole, wherein a pump well installation line is marked in advance on a bottom board at the periphery of the pump well open hole;
s2, assembling the pump well positioning device;
the pump well positioning device comprises two positioning frameworks which are fixed in a crossed manner, a groove is formed in the center of a framework of each positioning framework, a fixing hole penetrating through the framework is formed in the bottom of the groove, positioning holes penetrating through the framework are formed in two sides of the framework of each positioning framework respectively, centering stoppers capable of moving left and right are installed in the positioning holes, and positioning grooves for inserting positioning rules are formed in two end parts of each positioning framework respectively;
s3, installing the pump well positioning device on the pump well;
s4, vertically inserting a positioning ruler into each positioning groove of the pump well positioning device, wherein the bottom edge of the positioning ruler is abutted against the bottom plate of the ship;
and S5, moving the pump well positioning device until the positioning rulers coincide with the pump well installation line, and at the moment, installing the pump well in place.
Preferably, the specific steps of mounting the pump well positioning device on the pump well are as follows:
firstly, placing a pump well positioning device on a pump well, wherein a centering stop block on a positioning framework faces downwards;
then horizontally rotating the pump well positioning device to enable any positioning groove on the positioning frame to face the bow of the ship;
and finally, adjusting the positions of the centering stop blocks in the positioning holes according to the radius of the pump well, so that the end parts of the centering stop blocks are all abutted against the inner wall of the pump well.
Preferably, the specific steps of assembling the pump well positioning device are as follows:
firstly, oppositely and crossly buckling two positioning frameworks together, and locking and fixing the positioning frameworks through fixing bolts penetrating through fixing holes;
then, the centering stop block is placed below the positioning hole and locked and fixed through a positioning bolt penetrating through the positioning hole and the centering stop block, and the head of the positioning bolt is clamped on the positioning hole.
Preferably, the positioning hole is a waist-shaped hole.
Preferably, the fixing hole is a circular hole.
Preferably, the frame body surface of the positioning frame is provided with scale marks taking the circle center of the fixing hole as a zero scale mark.
Preferably, a threaded hole is formed in the center of the centering block, pointed ends extend outwards from two ends of the centering block, and the pointed ends are aligned with the scale marks.
Preferably, the positioning frame and the centering stop are both made of plywood.
The invention has the beneficial effects that:
the invention has simple and convenient operation, can quickly adjust and position the installation position of the pump well by utilizing the pump well positioning device, improves the installation precision of the pump well and ensures the construction quality of the ship.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a pump well positioning device.
Fig. 2 is a schematic structural view of the positioning frame.
Fig. 3 is a schematic view of a pump well installation line on the bottom plate of a ship.
Fig. 4 is a state diagram of the pump well positioning device in use.
Fig. 5 is a top view of the centering block.
The reference numerals in the figures have the meaning:
1 is the location framework, 2 is the recess, and 3 are the fixed orifices, and 4 are the locating hole, and 5 are centering dog, and 6 are the location chi, and 7 are the constant head tank, and 8 are the pump well trompil, and 9 are the pump well mounting line, and 10 are the pump well, and 11 are the bottom plate.
Detailed Description
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present application is described in further detail below with reference to specific embodiments and with reference to the attached drawings.
In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present application are described with reference to the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.
The invention provides a method for installing and positioning a pump well of a Mark III type LNG fuel tank.
In order to add a pump well to the LNG bunker, a pump well opening 8 is previously opened in the corresponding bulkhead when the LNG bunker is manufactured.
The manufactured LNG bunker is then installed in the hull. However, when the LNG bunker is installed, the center line of the LNG bunker may slightly deviate from the center line of the hull, and therefore, after the LNG bunker is installed, the three-dimensional coordinates of the pump well opening hole are corrected with the center line of the LNG bunker as a coordinate reference, and then, the pump well installation line 9 (actually, a cross line is drawn) is drawn on the bottom plate of the ship with the corrected three-dimensional coordinates of the pump well opening hole.
Then, the pump well 10 is installed using the pump well installation line 9 on the bottom plate of the ship as an installation reference, and after the pump well 10 is installed in the pump well opening, the position of the pump well 10 may be deviated from the pump well installation line 9, so that the installation position of the pump well 10 needs to be adjusted by the pump well positioning device.
Specifically, the pump well positioning device comprises two positioning frameworks 1 fixed in a crossed mode, and the two positioning frameworks 1 are identical in structure.
A recess 2 has been seted up to the support body central authorities of location framework 1, and a fixed orifices 3 that runs through the support body has been seted up to recess 2 bottom, and a locating hole 4 that runs through the support body has been seted up respectively to the support body both sides of location framework 1, installs centering dog 5 that can remove about in the locating hole 4, and the constant head tank 7 that is used for inserting location chi 6 has been opened respectively to the both ends of location framework 1.
The centering stop block 5 is arranged below the positioning hole 4 and is locked and fixed through a bolt penetrating through the positioning hole 4 and a threaded hole of the positioning hole 4, and the head of the bolt is clamped on the positioning hole 4.
Preferably, the frame body surface of the positioning frame 1 is provided with scale marks taking the circle center of the fixing hole 3 as a zero scale mark. The center of the centering stop block 5 is provided with a threaded hole, and the two ends of the centering stop block 5 extend outwards to form pointed ends which are aligned with the scale marks.
In this embodiment, the centering block 5 is prism-shaped, when the centering block 5 is installed, the centering block 5 is placed below the positioning hole 4, then the bolt passes through the positioning hole 4 and the threaded hole of the centering block 5, the nut is screwed on the bolt to be locked, the positioning hole 4 is designed to be a waist-shaped hole, and the fixing hole 3 is designed to be a circular hole.
In this embodiment, the positioning frame 1 and the centering block 5 are made of plywood.
The invention discloses a method for installing and positioning a pump well of a Mark III type LNG fuel tank, which comprises the following steps:
and S1, installing the pump well 10 in the pump well opening 8, and marking a pump well installation line 9 on a bottom board at the periphery of the pump well opening 8 in advance.
And S2, assembling the pump well positioning device.
Specifically, first, two positioning frames 1 are cross-buckled to each other and locked by bolts passing through fixing holes 3;
then, the centering block 5 is placed below the positioning hole 4 and locked and fixed by a bolt passing through the positioning hole 4 and the centering block 5, the head of which is caught on the positioning hole 4.
S3, mounting the pump well positioning device on the pump well 10.
Specifically, firstly, a pump well positioning device is placed on a pump well 10, and a centering stop block 5 on a positioning framework 1 faces downwards;
then horizontally rotating the pump well positioning device to enable any positioning groove on the positioning frame 1 to face the bow of the ship;
and finally, adjusting the positions of the centering stop blocks 5 in the positioning holes 4 according to the radius of the pump well 10 to enable the end parts of the centering stop blocks 5 to be abutted against the inner wall of the pump well 10, after the centering stop blocks 5 are adjusted in place, penetrating bolts through the positioning holes 4 and threaded holes in the centers of the centering stop blocks 5 to lock and fix the positioning stop blocks 5, and at the moment, the center of the pump well positioning device is the center of the pump well.
And S4, vertically inserting a positioning ruler 6 into each positioning groove 7 of the pump well positioning device, wherein the bottom edge of the positioning ruler 6 abuts against the bottom plate of the ship.
In this embodiment, the set square is selected for use as the set square 6, and the short right-angle side of set square 6 supports on the bottom board.
And S5, moving the pump well positioning device (the pump well positioning device can drive the pump well 10 to move) until each positioning ruler 6 is coincided with the pump well installation line 9. When the respective positioning rules 6 coincide with the pump well mounting line 9, it represents that the pump well 10 is mounted in place.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (8)

1. A method for installing and positioning a pump well of a Mark III type LNG fuel tank is characterized by comprising the following steps:
s1, installing the pump well in the pump well open hole, wherein a pump well installation line is marked in advance on a bottom board at the periphery of the pump well open hole;
s2, assembling the pump well positioning device;
the pump well positioning device comprises two positioning frameworks which are fixed in a crossed manner, a groove is formed in the center of a framework of each positioning framework, a fixing hole penetrating through the framework is formed in the bottom of the groove, positioning holes penetrating through the framework are formed in two sides of the framework of each positioning framework respectively, centering stoppers capable of moving left and right are installed in the positioning holes, and positioning grooves for inserting positioning rules are formed in two end parts of each positioning framework respectively;
s3, installing the pump well positioning device on the pump well;
s4, vertically inserting a positioning ruler into each positioning groove of the pump well positioning device, wherein the bottom edge of the positioning ruler is abutted against the bottom plate of the ship;
and S5, moving the pump well positioning device until the positioning rulers coincide with the pump well installation line, and at the moment, installing the pump well in place.
2. The method for installing and positioning the Mark III type LNG fuel tank pump well as claimed in claim 1, wherein the step of installing the pump well positioning device on the pump well is as follows:
firstly, placing a pump well positioning device on a pump well, wherein a centering stop block on a positioning framework faces downwards;
then horizontally rotating the pump well positioning device to enable any positioning groove on the positioning frame to face the bow of the ship;
and finally, adjusting the positions of the centering stop blocks in the positioning holes according to the radius of the pump well, so that the end parts of the centering stop blocks are all abutted against the inner wall of the pump well.
3. The method for installing and positioning the Mark III type LNG bunker pump well as claimed in claim 1, wherein the concrete steps of assembling the pump well positioning device are as follows:
firstly, oppositely and crossly buckling two positioning frameworks together, and locking and fixing the positioning frameworks through fixing bolts penetrating through fixing holes;
then, the centering stop block is placed below the positioning hole and locked and fixed through a positioning bolt penetrating through the positioning hole and the centering stop block, and the head of the positioning bolt is clamped on the positioning hole.
4. The method for installing and positioning the Mark III type LNG fuel tank pump well as claimed in claim 3, wherein the positioning hole is a kidney-shaped hole.
5. The method for installing and positioning the Mark III type LNG fuel tank pump well as claimed in claim 3, wherein the fixing hole is a circular hole.
6. The method for installing and positioning the Mark III type LNG fuel tank pump well as claimed in claim 1, wherein the frame body surface of the positioning frame is provided with scale marks with the circle center of the fixing hole as a zero scale Mark.
7. The method for installing and positioning the pump well of the Mark III type LNG fuel tank as claimed in claim 6, wherein the centering block is provided with a threaded hole in the center, and the two ends of the centering block are extended outwards to form tips which are aligned with the scale marks.
8. The method of claim 1, wherein the positioning frame and the centering stop are made of plywood.
CN202011415726.3A 2020-12-07 2020-12-07 Method for installing and positioning pump well of Mark III type LNG fuel tank Active CN112550632B (en)

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Application Number Priority Date Filing Date Title
CN202011415726.3A CN112550632B (en) 2020-12-07 2020-12-07 Method for installing and positioning pump well of Mark III type LNG fuel tank

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