CN107335934A - The installation method of LNG tank inner stiffener ring - Google Patents
The installation method of LNG tank inner stiffener ring Download PDFInfo
- Publication number
- CN107335934A CN107335934A CN201710539190.8A CN201710539190A CN107335934A CN 107335934 A CN107335934 A CN 107335934A CN 201710539190 A CN201710539190 A CN 201710539190A CN 107335934 A CN107335934 A CN 107335934A
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- Prior art keywords
- tank body
- stiffening ring
- installation
- body wallboard
- installation method
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention belongs to LNG storage tank technical field of construction, and in particular to the installation method of LNG tank inner stiffener ring.During in order to solve to carry out the installation of stiffening ring to LNG storage tank at present, there is the problem of work high above the ground is more, welding quality and welding efficiency are low, the present invention proposes a kind of installation method of LNG tank inner stiffener ring.The installation method, specifically includes following steps：Step S1, carry out the ground installation of part stiffening ring；Step S2, carry out the assembly of tank body wallboard；Step S3, carry out the high-altitude installation of remaining stiffening ring.By the way that conventional stiffening ring is divided into two parts, and a portion is previously-completed on ground to the installation with tank body wallboard.So, amount of high-altitude operation when all carrying out high-altitude installation to stiffening ring in the prior art is not only greatly reduced, and the welding position between stiffening ring and tank body wallboard during welding is improved, substantially increases welding efficiency and welding quality.
Description
Technical field
The invention belongs to LNG storage tank technical field of construction, and in particular to the installation method of LNG tank inner stiffener ring.
Background technology
Stiffening ring is a kind of important device for preventing tank body external pressure unstability, can effectively reduce the thickness of tank body steel plate, hence it is evident that
Mitigate the weight of tank body.When tank body vacuumize etc. operation, the pressure in tank will be less than external atmosphere pressure.Now, if
Tank body thickness low LCL, is insufficiently resistant to this negative pressure load, and tank body will produce external pressure buckling deformation.If it is not provided with adding in tank body
Strong circle, the thickness resistance external pressure buckling deformation of tank body itself is only relied on, tank body thickness will substantially increase, and increase tank body oneself
Weight, adds manufacturing cost, while also reduce tank body load-carrying.Therefore, in the tank body of external pressure is subjected to, setting is typically passed through
The mode of stiffening ring reduces the thickness of tank body, ensures the anti-pressure ability of tank body.
With reference to shown in Fig. 1, with 160000m3Exemplified by LNG storage tank, the installation to stiffening ring 1 at present is in the same pot body wall
On plate 2 set two end to end reinforcements 11, and the length summation of two reinforcements 11 just with a tank body wallboard 2
Arc length it is equal.Now, the tank body wallboard 2 of the place layer of stiffening ring 1 is installed first, and tank body wallboard 2 is entered
Row film making detection；After the installation detection of tank body wallboard 2 is qualified, reinforcement 11 is lifted to setting height(from bottom) by suspender, carried out
Being fixedly connected between tank body wallboard 2.
Wherein, the design attitude of stiffening ring is generally in the five circle tank bodies in the high dummy section in general 11 meters to 33 meters of ground
On wallboard, and each circle is assembled by 22 pieces of tank body wallboards, therefore needs to carry out the fixed peace of 220 pieces of reinforcements altogether
Dress, gross weight reach 76 tons or so.So, not only need to carry out substantial amounts of upper air installing operation and overhead welding operation, exist
Very big security risk, and it is more difficult in the high fixed welding operation for carrying out reinforcement in the air, and welding quality is imitated with welding
Rate is lower.
The content of the invention
During in order to solve to carry out the installation of stiffening ring to LNG storage tank at present, there is work high above the ground is more, welding quality and weldering
The problem of efficiency is low is connect, the present invention proposes a kind of installation method of LNG tank inner stiffener ring.The installation method, specifically include with
Lower step：
Step S1, carry out the ground installation of part stiffening ring；By group to frock, on the ground by part stiffening ring and tank
Installation is fixed in body wall plate, and the wherein part stiffening ring is less than corresponding tank body wallboard in circumferencial direction in the length of circumferencial direction
Length, and the part stiffening ring is arranged on corresponding tank body wallboard in the centre position of circumferencial direction；
Step S2, carry out the assembly of tank body wallboard；Installation at high altitude is carried out to the tank body wallboard for completing the installation of part stiffening ring,
And carry out dimensional gaughing to completing assembled tank body wallboard；
Step S3, carry out the high-altitude installation of remaining stiffening ring；To completing film making inspection and qualified tank body wallboard, remained
The high-altitude installation of remaining stiffening ring, remaining stiffening ring is inserted to the reinforcement for having completed fixation between two neighboring tank body wallboard
Between circle, and it is fixedly connected by way of welding.
Preferably, the stiffening ring is made up of long reinforcement and short reinforcement, long reinforcement described in two of which and one
The short reinforcement is equal to length of the tank body wallboard in circumferencial direction in the length summation of circumferencial direction.
It is further preferred that the ground installation of long reinforcement in stiffening ring is carried out in the step S1, in the step
The high-altitude installation of short reinforcement in stiffening ring is carried out in S3；Wherein, two long reinforcements are fixed in the step S1
On tank body wallboard, and it is end to end.
Preferably, described group to frock, including base, adjusting rod and support bar, wherein one end of the adjusting rod with
The base is flexibly connected, and can adjust its height vertically, the other end is fixedly connected with the support bar, and institute
Support bar is stated to set in horizontal direction.
It is further preferred that the both ends of the support bar are respectively provided with an adjusting rod.
It is further preferred that in the step S1, carry out that part stiffening ring is surface-mounted to be concretely comprised the following steps：
Step S11, height regulation is carried out to the adjusting rod in frock to described group, all support bars is located at same arc
On shape face, the wherein radian size of the arcwall face and the radian size of tank body wallboard is identical；
Step S12, tank body wallboard is placed in described group on the support bar of frock, and support bar is finely adjusted, made
All support bars all contact support with tank body wallboard；
Step S13, part stiffening ring is placed in the centre position of the tank body wallboard, and carries out the part stiffening ring and institute
State being fixedly connected between tank body wallboard.
Preferably, the support bar uses tube-shaped structure.
Preferably, the adjusting rod uses screw structure, and forms Worm gear feed screw lifting structure with the base.
Preferably, the stiffening ring installed in the step S1 is located at interposition of the tank body wallboard in vertical direction
Put.
LNG tank inner stiffener ring is installed using the installation method of LNG tank inner stiffener ring of the present invention, had beneficial below
Effect：
1st, in the present invention, the structure of stiffening ring is improved to by the different long reinforcement of length and short reinforcement phase first
Mutually combine, and based on this, the installation method of LNG tank inner stiffener ring is adjusted to：First on the ground to strengthening
Circle is pre-installed, i.e., carries out ground installation to long reinforcement, then carry out the assembly of tank body wallboard again, finally carry out short reinforcement
The high-altitude installation of muscle, and then long reinforcement is connected as an entirety, form complete stiffening ring.So, can utilize the bottom of to
When layer tank body wallboard carries out assembled, most of reinforcement in stiffening ring is pre-installed in the centre of upper strata tank body wooden partition
Position, stiffening ring high-altitude installation is carried out in the later stage so as in the case where not influenceing tank body wallboard assembly, greatly reduce
Time, and later stage carry out the workload of stiffening ring high-altitude installation, improve the installation effectiveness of whole stiffening ring.
2nd, in the present invention, most of reinforcement in stiffening ring is to complete to be welded and fixed with tank body steel plate on ground,
A small number of reinforcements are completed to be fixedly connected by overhead welding.So, during being welded and fixed of stiffening ring, 2F is mainly carried out
With the welding of 3G welding positions, the i.e. welding of cross level angle welding position and vertical position welding welding.With in the prior art, high-altitude all being carried out to stiffening ring
The welding of 4F with the 4G welding positions used during welding compares, i.e., compared with welding of welding and weld in the overhead position with elevation angle welding position, significantly
The operation difficulty of welding process is reduced, so as to ensure that the quality of the efficiency of welding and welding.
3rd, in the present invention, in order to ensure to carry out stiffening ring and the quality of tank body wallboard fixed installation on ground, on ground
The upper group that is provided with is to frock.By the way that the length of adjusting rod in frock is adjusted group, make group to all of frock upper end
Strut is in one and tank body wallboard radian identical arcwall face.So, can be with when tank body wallboard being placed in into group in frock
When stable support is provided tank body wallboard, and then ensureing that stiffening ring and tank body wallboard is fixed, tank wall Board position
Stability, ensure the quality that stiffening ring is fixedly mounted with tank body wallboard.
Brief description of the drawings
Fig. 1 is the mounting structure schematic diagram of stiffening ring and LNG tank body wall plate in the prior art；
Fig. 2 is the position relationship schematic diagram of stiffening ring and LNG tank body wall plate in the present invention；
Fig. 3 is along the structural representation in F directions in Fig. 2；
Fig. 4 is the schematic flow sheet of the installation method of LNG tank inner stiffener ring of the present invention；
Fig. 5 is long reinforcement and the schematic diagram during progress ground installation of tank body wallboard in the present invention.
Embodiment
The technical scheme in the present invention is described in detail below in conjunction with the accompanying drawings.
With reference to shown in Fig. 2, in the present invention, stiffening ring 1 is made up of the different two parts reinforcement of length dimension, is respectively
Long reinforcement 12 and short reinforcement 13.Wherein, two long reinforcement 12 and one short reinforcement 13 are total in the length of circumferencial direction
With equal to one tank body wallboard 2 circumferencial direction length.It can so ensure on the sustained height of tank body wallboard 2, pass through
Head and the tail connection between multiple long reinforcements 12 and multiple short reinforcements 13, can form a complete stiffening ring 1.
With reference to shown in Fig. 2 to Fig. 5, the installation method of LNG tank inner stiffener ring of the invention, following steps are specifically included：
Step S1, carry out the ground installation of long reinforcement 12.By group to frock 3, on the ground by two long reinforcements
12 end to end are fixed installation with tank body wallboard 2.Wherein, overall length dimension of the two long reinforcement 12 in circumferencial direction
Less than corresponding tank body wallboard 2 in the length dimension of circumferencial direction, and two long reinforcement 12 is fixed on corresponding tank body wallboard 2
In the centre position of circumferencial direction.Now, in each reserved certain gap of two marginal positions of the circumferencial direction of tank body wallboard 2,
Welding when carrying out assembly for two tank body wallboards 2 to longitudinal seam 21 operates.So, fixed to completing long reinforcement 12
Tank body wallboard 2 when carrying out assembly, the welding of longitudinal seam 21 between tank body wallboard 2 can be rapidly completed by reserved gap
Work, it is empty without enough operations if alignd so as to avoid the free end of long reinforcement 12 with the edge of tank body wallboard 2
Between situation about being welded to longitudinal seam 21, realize the zero interference to the concatenation of tank body wallboard 2, and then ensure that tank body
Joining quality between wallboard 2.
Group is to frock 3, including base 31, adjusting rod 32 and support bar 33.Wherein, one end of adjusting rod 32 and base 31
Be flexibly connected, its height vertically can be adjusted, the other end is fixedly connected with support bar 33, and with support bar 33 into
Plumbness, make support bar 33 horizontally disposed.
Preferably, adjusting rod 32 uses screw structure, and is connected by worm gear with base 31, composition Screw of Worm Gear lifting
Structure, so as to realize the accurate adjustment to the height of adjusting rod 32.In addition, it is respectively provided with a regulation in two ends of support bar 33
Bar 32.So, height regulation is carried out by being pointed to the adjusting rod 32 at the both ends of support bar 33 respectively, can be to the water of support bar 33
Level state is adjusted, and it is pasted jail with tank body wallboard 2 and is contacted.
It is further preferred that concretely comprised the following steps when carrying out ground installation to long reinforcement 12 to frock 3 by group：
Step S11, height regulation is carried out to the adjusting rod 32 in frock 3 to group.By to each both ends of support bar 33
Adjusting rod 32 carry out height regulation, all support bars 33 is located on same arcwall face, and make the radian of the arcwall face
Size is identical with the radian size of tank body wallboard 2.
Step S12, tank body wallboard 2 is placed in group on the support bar 33 of frock 3, and by entering to all support bars 33
Fine setting in row height, all support bars 33 is all carried out contact support with tank body wallboard 2, ensure tank body wallboard 2 in group to work
Fill the stationarity placed on 3.
Wherein, in the present embodiment, group is to being provided with seven support bars 33 being parallel to each other, and support bar 33 in frock 3
Using tube-shaped structure.Now, by carrying out cooperation adjustment to the adjusting rod 32 at the single both ends of support bar 33, each can be made
Linear contact lay is all formed between support bar 33 and tank body wallboard 2, it is continuous whole so as to form one in the presence of multiple linear contact lays
Curved support face.So, the stability supported to tank body wallboard 2 can not only be ensured, and can in the presence of linear contact lay
To carry out appropriate protection to tank body wallboard 2, the destruction for the scuffing that avoids causing to collide with to the surface of tank body wallboard 2.
Step S13, by the centre position being placed on the circumferencial direction of tank body wallboard 2 that the long reinforcement 12 of two pieces is end to end,
Make long reinforcement 12 contacted with tank body wallboard 2 patch jail, and long reinforcement 12 is carried out between tank body wallboard 2 be fixedly connected with
And being fixedly connected between two long reinforcement 12.
Now, because tank body wallboard 2 is that frock 3 is kept flat on the ground by group.Therefore, long reinforcement 12 and tank body
The all 2F in the welding position of angle welding between wallboard 2, i.e. cross level angle welding position；The welding position of butt weld between long reinforcement 12
All 3G, i.e. vertical position welding.So, long reinforcement 12 and tank body wallboard 2 are welded by using 2F and 3G welding position,
Welding difficulty is not only greatly reduced, and improves the quality and efficiency of welding.
Step S2, carry out the assembly of tank body wallboard.When complete between long reinforcement 12 and tank body wallboard 2 be welded and fixed with
And after welding detection between the two, installation at high altitude is carried out to tank body wallboard 2 by suspender, and to completing assembled tank wall
Plate 2 carries out film making inspection.
Step S3, carry out the high-altitude installation of short reinforcement 13.To completing film making inspection and qualified tank body wallboard 2, carry out
The high-altitude installation of short reinforcement 13, so as to complete the installation of whole stiffening ring 1.
Because in step sl, the long reinforcement 12 of installation is all located at tank body wallboard 2 in the centre position of circumferencial direction.
Therefore, the gap of circumferencial direction is left between the long reinforcement 12 on adjacent two pieces of tank body wallboards 2, short reinforcement 13 is inserted
Butt welding is carried out into the gap, and to short reinforcement 13 and long reinforcement 12, and to short reinforcement 13 and tank body wallboard 2
Welding is fixed, so as to be connected as one positioned at all long reinforcements 12 of sustained height, with short 13 common shape of reinforcement
Into a complete stiffening ring.
In addition, in step sl, long reinforcement 12 is fixed on tank body wallboard 2 in the centre position of short transverse.So
It can avoid when carrying out girth welding to tank body wallboard 2, long reinforcement 12 operates to welding and produces interference effect, so as to ensure
To the welding efficiency and welding quality of tank body wallboard 2.
Using the method for the present invention to Ningbo of Zhejiang 160000m3When LNG storage tank carries out the installation of stiffening ring, according to tank body
The length dimension of short reinforcement 13 in stiffening ring 1 is designed as 2 meters in the length of circumferencial direction by wallboard 2.Now, strengthen long
Muscle 12 and tank body wallboard 2 are completed after being fixedly connected, and two free ends of long reinforcement 12 and tank body wallboard 2 are in a circumferential direction
Two edges are each at a distance of 1 meter.So, short stiffening ring 12 then crosses over two tank body wallboards 2, is pointed on adjacent tank wall plate 2
Long reinforcement 12 be fixedly connected.Equally, can also be according to the size and site operation of tank body wallboard 2 in other storage tanks
Situation, other sizes are used to short reinforcement 13, as long as not influenceing the welding between tank body wallboard 2 and being easy to short reinforcement
It is fixed that muscle 13 carries out installation.In addition, using the method for the present invention to 160000m3LNG storage tank carries out the installation of stiffening ring
When, the high-altitude installation exercise duration of stiffening ring shorten to present about 5 days by original about 15 days.So, not only significantly
Reduce the workload in high-altitude, and greatly reduce the time that high-altitude installation is carried out to stiffening ring, and then reduce whole LNG
The work high above the ground time during Storage Tank Construction, so as to improve the efficiency of construction of LNG storage tank, reduce work high above the ground risk.
Claims (9)
1. a kind of installation method of LNG tank inner stiffener ring, it is characterised in that the installation method specifically includes following steps：
Step S1, carry out the ground installation of part stiffening ring；By group to frock, on the ground by part stiffening ring and tank wall
Installation is fixed in plate, and the wherein part stiffening ring is less than length of the corresponding tank body wallboard in circumferencial direction in the length of circumferencial direction
Degree, and the part stiffening ring is arranged on corresponding tank body wallboard in the centre position of circumferencial direction；
Step S2, carry out the assembly of tank body wallboard；Installation at high altitude is carried out to the tank body wallboard for completing the installation of part stiffening ring, and
Dimensional gaughing is carried out to completing assembled tank body wallboard；
Step S3, carry out the high-altitude installation of remaining stiffening ring；Completion film making is checked and qualified tank body wallboard, progress residue add
Enclose by force high-altitude installation, by remaining stiffening ring insert between two neighboring tank body wallboard completed fixed stiffening ring it
Between, and be fixedly connected by way of welding.
2. the installation method of LNG tank inner stiffener ring according to claim 1, it is characterised in that the stiffening ring is added by growing
Strengthening tendons and short reinforcement composition, the length summation of long reinforcement described in two of which and a short reinforcement in circumferencial direction
Length of equal to the one tank body wallboard in circumferencial direction.
3. the installation method of LNG tank inner stiffener ring according to claim 2, it is characterised in that enter in the step S1
The ground installation of long reinforcement in row stiffening ring, carries out the high-altitude installation of short reinforcement in stiffening ring in the step S3；Its
In, two long reinforcements are fixed on tank body wallboard in the step S1, and be end to end.
4. the installation method of LNG tank inner stiffener ring according to claim 1, it is characterised in that described group to frock, including
Base, adjusting rod and support bar, wherein one end of the adjusting rod is flexibly connected with the base, it can be adjusted along vertical
The height in direction, the other end are fixedly connected with the support bar, and the support bar is set in horizontal direction.
5. the installation method of LNG tank inner stiffener ring according to claim 4, it is characterised in that the both ends of the support bar
It is respectively provided with an adjusting rod.
6. the installation method of LNG tank inner stiffener ring according to claim 4, it is characterised in that in the step S1, enter
Row part stiffening ring is surface-mounted to be concretely comprised the following steps：
Step S11, height regulation is carried out to the adjusting rod in frock to described group, all support bars is located at same arcwall face
On, the wherein radian size of the arcwall face and the radian size of tank body wallboard is identical；
Step S12, tank body wallboard is placed in described group on the support bar of frock, and support bar is finely adjusted, make to own
Support bar all contacts support with tank body wallboard；
Step S13, part stiffening ring is placed in the centre position of the tank body wallboard, and carries out the part stiffening ring and the tank
Being fixedly connected between body wall plate.
7. the installation method of the LNG tank inner stiffener ring according to any one in claim 4-6, it is characterised in that described
Support bar uses tube-shaped structure.
8. the installation method of the LNG tank inner stiffener ring according to any one in claim 4-6, it is characterised in that described
Adjusting rod uses screw structure, and forms Worm gear feed screw lifting structure with the base.
9. the installation method of the LNG tank inner stiffener ring according to any one in claim 1-6, it is characterised in that in institute
State the stiffening ring installed in step S1 and be located at the tank body wallboard in the centre position of vertical direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710539190.8A CN107335934B (en) | 2017-07-04 | 2017-07-04 | The installation method of LNG tank inner stiffener ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710539190.8A CN107335934B (en) | 2017-07-04 | 2017-07-04 | The installation method of LNG tank inner stiffener ring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107335934A true CN107335934A (en) | 2017-11-10 |
| CN107335934B CN107335934B (en) | 2019-03-01 |
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ID=60218432
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710539190.8A Active CN107335934B (en) | 2017-07-04 | 2017-07-04 | The installation method of LNG tank inner stiffener ring |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB681682A (en) * | 1951-05-09 | 1952-10-29 | Metal Containers Ltd | Improvements in or relating to containers |
| GB1150365A (en) * | 1967-06-29 | 1969-04-30 | Jean Vaillant | A Container for the Transportation of Liquids |
| US5083673A (en) * | 1989-10-27 | 1992-01-28 | Container Design Limited | Container tank |
| CN203795928U (en) * | 2014-05-04 | 2014-08-27 | 葛洲坝集团第一工程有限公司 | Hoisting stiffening ring for producing and mounting large cylindrical storage tank |
| CN104456059A (en) * | 2014-10-21 | 2015-03-25 | 中国海洋石油总公司 | Mounting method for inner tank wallboards of self-supporting LNG storage tank |
| CN106736227A (en) * | 2017-03-15 | 2017-05-31 | 新煌集团湖南新煌石油设备制造有限公司 | A kind of built-in reinforcement coil structures of two-compartment oil tank |
-
2017
- 2017-07-04 CN CN201710539190.8A patent/CN107335934B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB681682A (en) * | 1951-05-09 | 1952-10-29 | Metal Containers Ltd | Improvements in or relating to containers |
| GB1150365A (en) * | 1967-06-29 | 1969-04-30 | Jean Vaillant | A Container for the Transportation of Liquids |
| US5083673A (en) * | 1989-10-27 | 1992-01-28 | Container Design Limited | Container tank |
| CN203795928U (en) * | 2014-05-04 | 2014-08-27 | 葛洲坝集团第一工程有限公司 | Hoisting stiffening ring for producing and mounting large cylindrical storage tank |
| CN104456059A (en) * | 2014-10-21 | 2015-03-25 | 中国海洋石油总公司 | Mounting method for inner tank wallboards of self-supporting LNG storage tank |
| CN106736227A (en) * | 2017-03-15 | 2017-05-31 | 新煌集团湖南新煌石油设备制造有限公司 | A kind of built-in reinforcement coil structures of two-compartment oil tank |
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| Publication number | Publication date |
|---|---|
| CN107335934B (en) | 2019-03-01 |
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