CN112078754A - Installation method of unconstrained expansion joint - Google Patents
Installation method of unconstrained expansion joint Download PDFInfo
- Publication number
- CN112078754A CN112078754A CN202010813235.8A CN202010813235A CN112078754A CN 112078754 A CN112078754 A CN 112078754A CN 202010813235 A CN202010813235 A CN 202010813235A CN 112078754 A CN112078754 A CN 112078754A
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- Prior art keywords
- expansion joint
- compression
- unconstrained expansion
- unconstrained
- installing
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000009434 installation Methods 0.000 title claims description 14
- 230000006835 compression Effects 0.000 claims abstract description 92
- 238000007906 compression Methods 0.000 claims abstract description 92
- 238000003466 welding Methods 0.000 abstract description 12
- 229910000746 Structural steel Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
-
- 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
-
- 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
- B63B73/60—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms characterised by the use of specific tools or equipment; characterised by automation, e.g. use of robots
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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)
- Robotics (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The invention discloses a mounting method of an unconstrained expansion joint, which comprises the following steps: determining the compression amount of the unconstrained expansion joint according to the position of the pipe system to be installed of the unconstrained expansion joint; uniformly installing a plurality of length-adjustable compression tools in the circumferential direction of the unconstrained expansion joint; compressing the unconstrained expansion joint by adjusting the compression tool according to the compression amount; fixing the compressed unconstrained expansion joint at the position of a piping system to be installed; the compression tool is removed from the unconstrained expansion joint. The expansion joint can be compressed without using open fire; avoid electric welding spot welding angle bar compression expansion joint, cause unnecessary electric welding spark damage, can reduce expansion joint's damage and liberation labour.
Description
Technical Field
The invention relates to the technical field of ship construction, in particular to an installation method of an unconstrained expansion joint.
Background
Expansion joints are of great interest in marine and even industrial piping. The device has the function of eliminating the vibration of the piping system in the whole piping system, and can offset the expansion and contraction amount of the piping system caused by thermal expansion and cold contraction, thereby maintaining the safety and stability of the piping system.
Usually, when the expansion joint leaves a factory, the compression amount of the expansion joint is preset, and the expansion joint is well restrained by a restraining device and is integrated with the expansion joint into a whole, so that the expansion joint is the expansion joint with the restraining device; however, some expansion joints have not been designed with the option of having no restraint because the compression is not very large (typically within 10 mm), but such expansion joints have been designed to be installed in practice.
The current conventional installation method:
step 1: manually compressing the expansion joint, and measuring the length of the compressed expansion joint by using a measuring tape to determine whether the length meets the design requirement;
step 2: respectively leaning angle irons with proper specification and length against two sides of flanges at the upper end and the lower end of the expansion joint, fixing by spot welding, and measuring the length of the compressed expansion joint again;
and step 3: the expansion joint is installed into the piping, threaded with bolts for tightening, and then the angle iron is removed.
However, when the angle iron is fixed on the end flange of the expansion joint by spot welding in the conventional installation method, electric sparks generated in electric welding operation can damage the corrugated pipe of the expansion joint, and if the electric welding sparks are seriously burnt, the expansion joint can be damaged, so that the expansion joint cannot be normally used.
Disclosure of Invention
In view of the above, the present invention provides a method for installing an unconstrained expansion joint, which does not require electric welding operation, does not cause the expansion joint to be burned by electric welding sparks, and can reduce damage to the expansion joint and liberate labor force.
A mounting method of an unconstrained expansion joint specifically comprises the following steps:
s1, determining the compression amount according to the position of the pipe system to be installed of the unconstrained expansion joint;
s2, uniformly installing a plurality of compression tools with adjustable lengths in the circumferential direction of the unconstrained expansion joint;
s3, compressing the unconstrained expansion joint by adjusting the compression tool according to the compression amount;
s4, fixing the compressed unconstrained expansion joint at the position of the pipe system to be installed;
s5, removing the compression tool from the unconstrained expansion joint.
Preferably, the step S5 is followed by a step S6, after the compression tool is removed, the length of the expansion joint is retested to meet the installation design requirement, and if not, the steps S3 and S4 are repeated until the length of the expansion joint meets the installation design requirement.
Preferably, the step S2 of uniformly installing a plurality of height-adjustable compression tools in the circumferential direction of the unconstrained expansion joint comprises the following specific steps:
firstly, determining the number of compression points on the unconstrained expansion joint according to the drift diameter of the unconstrained expansion joint;
then, assembling a corresponding number of length-adjustable compression tools according to the number of compression points on the unconstrained expansion joint;
finally, the assembled compression tools are uniformly mounted on the unconstrained expansion joint.
Preferably, the compression tool comprises a connecting rod and a compression member screwed on the upper and lower ends of the connecting rod, and the screw threads of the internal threads on the upper and lower ends of the connecting rod are opposite.
Preferably, the compression part comprises a pressing block and a screw rod fixed on the pressing block, the pressing block is L-shaped, and the end surface of the horizontal section of the pressing block is arranged to be an inclined surface.
Preferably, when the unconstrained expansion joint is compressed by adjusting the compression tool in step S3, the connecting rod is rotated to move the compression members fixed to the upper and lower end portions of the connecting rod toward each other, thereby compressing the unconstrained expansion joint to the set compression amount.
Preferably, the maximum length of the compression tool is 1mm longer than the uncompressed length of the unconstrained expansion joint.
Preferably, the number of compression points on the unconstrained expansion joint is at least two.
Preferably, when the drift diameter of the unconstrained expansion joint is DN 15-D65, 2 compression points are symmetrically arranged on the unconstrained expansion joint;
when the drift diameter of the unconstrained expansion joint is DN 80-D200, 3 compression points are arranged on the unconstrained expansion joint;
when the drift diameter of the unconstrained expansion joint is more than D200, at least 4 compression points are arranged on the unconstrained expansion joint.
The invention has the beneficial effects that:
1. the compression tool is arranged on the unconstrained expansion joint, so that the expansion joint can be compressed without using open fire; avoid electric welding spot welding angle bar compression expansion joint, cause unnecessary electric welding spark damage, can reduce expansion joint's damage and liberation labour.
2. The expansion joint is simple to use and convenient to operate, is suitable for expansion joints of all unconstrained devices, and saves a large amount of manpower and material resources.
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 view of a compression tool mounted on an unconstrained expansion joint.
Fig. 2 is a schematic view of an unconstrained expansion joint with 4 compression tools installed thereon.
Fig. 3 is a schematic view of the structure of the compression tool.
Fig. 4 is a schematic structural view of the connecting rod.
Fig. 5 is a schematic view of the construction of the compression member.
The reference numerals in the figures have the meaning:
1 is a connecting rod, 2 is a compression piece, 3 is an unconstrained expansion joint, 4 is a compression tool, 5 is a pressing block, and 6 is a screw rod.
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" and "lower" used in the description of the embodiments of the present application are used in a descriptive sense only and not for purposes of limitation. 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 an unconstrained expansion joint, which specifically comprises the following steps:
s1, determining the amount of compression of the unconstrained expansion joint 3 according to its location in the pipe string to be installed.
S2, a plurality of length-adjustable compression tools 4 are uniformly installed in the circumferential direction of the unconstrained expansion joint 3.
Specifically, first, the number of compression points on the unconstrained expansion joint 3 is determined according to the size of the path of the unconstrained expansion joint 3.
The number of compression points on the unconstrained expansion joint 3 is at least two.
Generally, when the drift diameter of the unconstrained expansion joint 3 is DN 15-D65, 2 compression points are symmetrically arranged on the unconstrained expansion joint 3;
when the drift diameter of the unconstrained expansion joint 3 is DN 80-D200, 3 compression points are arranged on the unconstrained expansion joint 3, the 3 compression points are uniformly distributed in the circumferential direction of the unconstrained expansion joint 3, and the interval between every two adjacent compression points is 120 degrees;
when the drift diameter of the unconstrained expansion joint 3 is more than D200, 4 compression points are arranged on the unconstrained expansion joint 3, the 4 compression points are uniformly distributed in the circumferential direction of the unconstrained expansion joint 3, and the interval between every two adjacent compression points is 90 degrees. If the compression points are not enough under special conditions, the compression points can be correspondingly increased according to actual conditions, but the compression points need to be uniformly distributed.
Then, depending on the number of compression points on the unconstrained expansion joint 3, a corresponding number of length-adjustable compression tools 4 are assembled.
The compression tool 4 comprises a connecting rod 1 and a compression piece 2 fixed at the upper end and the lower end of the connecting rod 1 by threads, and the thread directions of the internal threads at the upper end and the lower end of the connecting rod 1 are opposite; in the embodiment, the compression piece 2 comprises a pressing block 5 and a screw 6 fixed on the pressing block 5, the pressing block 5 is L-shaped, and the end surface of the horizontal section of the pressing block 5 is an inclined surface; in the case of ensuring the structural strength of the compact 5, the thickness of the horizontal section (the portion in contact with the unconstrained expansion joint) of the compact 5 is not excessively thick, and is preferably set to 5mm to 10 mm.
The length of the connecting rod 1 is selected according to the size of the expansion joint 3, and the length of the connecting rod is 100mm-200mm shorter than the length of the expansion joint 3 before compression.
Finally, the assembled compression tool 4 is mounted evenly on the unconstrained expansion joint 3.
The maximum length of the compression tool 4 is 1mm longer than the uncompressed length of the unconstrained expansion joint 3.
S3, the unconstrained expansion joint 3 is compressed by adjusting the respective compression tools 4 in accordance with the compression amount determined in step S1.
When the unconstrained expansion joint 3 is compressed by adjusting the compression tool 4, the connecting rod 1 is rotated to move the compression pieces 2 fixed to the upper and lower end portions of the connecting rod 1 toward each other, thereby compressing the unconstrained expansion joint 3 to a set compression amount. When in compression, the compression is carried out symmetrically and gradually until the compression reaches the size required by the design
S4, fixing the compressed unconstrained expansion joint 3 at the position of the pipe system to be installed;
s5, the compression tool 4 is removed from the unconstrained expansion joint 3.
Preferably, the method further comprises a step S6, after the compression tool is removed, retesting whether the length of the unconstrained expansion joint 3 meets the installation design requirements, and if not, repeating the steps S3 and S4 until the length of the unconstrained expansion joint 3 meets the installation design requirements.
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 (9)
1. A mounting method of an unconstrained expansion joint is characterized by comprising the following steps:
s1, determining the compression amount according to the position of the pipe system to be installed of the unconstrained expansion joint;
s2, uniformly installing a plurality of compression tools with adjustable lengths in the circumferential direction of the unconstrained expansion joint;
s3, compressing the unconstrained expansion joint by adjusting the compression tool according to the compression amount;
s4, fixing the compressed unconstrained expansion joint at the position of the pipe system to be installed;
s5, removing the compression tool from the unconstrained expansion joint.
2. The installation method of an unconstrained expansion joint according to claim 1, wherein the step S5 is followed by a step S6, wherein after the compression tool is removed, the length of the expansion joint is retested to meet the installation design requirements, and if not, the steps S3 and S4 are repeated until the length of the expansion joint meets the installation design requirements.
3. The installation method of an unconstrained expansion joint according to claim 1, wherein the specific steps of uniformly installing a plurality of height-adjustable compression tools in the circumferential direction of the unconstrained expansion joint in step S2 are:
firstly, determining the number of compression points on the unconstrained expansion joint according to the drift diameter of the unconstrained expansion joint;
then, assembling a corresponding number of length-adjustable compression tools according to the number of compression points on the unconstrained expansion joint;
finally, the assembled compression tools are uniformly mounted on the unconstrained expansion joint.
4. A method of installing an unconstrained expansion joint according to claim 3, wherein said compression means includes a connecting rod and compression members threadedly secured to upper and lower ends of the connecting rod, the threads of the internal threads of the upper and lower ends of the connecting rod being in opposite directions.
5. The method of installing an unconstrained expansion joint according to claim 4, wherein the compression element includes a pressing block and a screw fixed to the pressing block, the pressing block is L-shaped, and an end surface of a horizontal section of the pressing block is provided with an inclined surface.
6. The method of installing an unconstrained expansion joint according to claim 4, wherein when the unconstrained expansion joint is compressed by adjusting the compression tool in step S3, the connecting rod is rotated to move the compression members fixed to the upper and lower end portions of the connecting rod toward each other, thereby compressing the unconstrained expansion joint to the set compression amount.
7. A method of installing an unconstrained expansion joint according to claim 3, wherein the maximum length of the compression tool is 1mm longer than the uncompressed length of the unconstrained expansion joint.
8. A method of installing an unconstrained expansion joint according to claim 3, wherein the number of compression points on said unconstrained expansion joint is at least two.
9. The installation method of the unconstrained expansion joint according to claim 7, wherein when the drift diameter of the unconstrained expansion joint is DN 15-D65, 2 compression points are symmetrically arranged on the unconstrained expansion joint;
when the drift diameter of the unconstrained expansion joint is DN 80-D200, 3 compression points are arranged on the unconstrained expansion joint;
when the drift diameter of the unconstrained expansion joint is more than D200, at least 4 compression points are arranged on the unconstrained expansion joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010813235.8A CN112078754A (en) | 2020-08-13 | 2020-08-13 | Installation method of unconstrained expansion joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010813235.8A CN112078754A (en) | 2020-08-13 | 2020-08-13 | Installation method of unconstrained expansion joint |
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| Publication Number | Publication Date |
|---|---|
| CN112078754A true CN112078754A (en) | 2020-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010813235.8A Pending CN112078754A (en) | 2020-08-13 | 2020-08-13 | Installation method of unconstrained expansion joint |
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| CN (1) | CN112078754A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114952700A (en) * | 2022-07-06 | 2022-08-30 | 上海中船三井造船柴油机有限公司 | Mounting tool and method for expansion joint of marine low-speed diesel engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2648070A1 (en) * | 1989-06-12 | 1990-12-14 | Stolz Sequipag | Device for unblocking and mounting devices using a tapered sleeve |
| CN101820142A (en) * | 2010-04-27 | 2010-09-01 | 中国西电电气股份有限公司 | Special compressor of expansion joint in gas-insulated metal-enclosed switchgear |
| CN204358324U (en) * | 2014-12-25 | 2015-05-27 | 大连船舶重工集团有限公司 | Based on the flexible expansion joint controlling excessive deformation mechanism |
| US20160003389A1 (en) * | 2013-02-22 | 2016-01-07 | Mitsubishi Heavy Industries Compressor Corporation | Expansion joint and compression system |
| CN206702914U (en) * | 2017-04-12 | 2017-12-05 | 中国神华能源股份有限公司 | A kind of expansion joint dismantling device |
| CN108145652A (en) * | 2017-11-20 | 2018-06-12 | 沪东中华造船(集团)有限公司 | A kind of large size expansion pipe installation method |
| CN108247574A (en) * | 2017-12-26 | 2018-07-06 | 渤海造船厂集团有限公司 | A kind of adjusting bellows installing/dismounting method |
| CN109895030A (en) * | 2019-04-08 | 2019-06-18 | 沈阳晨光弗泰波纹管有限公司 | The big displacement Compression and Expansion method of Compression and Expansion tooling and expansion joint |
| CN210950387U (en) * | 2019-11-04 | 2020-07-07 | 无锡市华波金属波纹软管有限公司 | Thrust-free corrugated expansion joint |
-
2020
- 2020-08-13 CN CN202010813235.8A patent/CN112078754A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2648070A1 (en) * | 1989-06-12 | 1990-12-14 | Stolz Sequipag | Device for unblocking and mounting devices using a tapered sleeve |
| CN101820142A (en) * | 2010-04-27 | 2010-09-01 | 中国西电电气股份有限公司 | Special compressor of expansion joint in gas-insulated metal-enclosed switchgear |
| US20160003389A1 (en) * | 2013-02-22 | 2016-01-07 | Mitsubishi Heavy Industries Compressor Corporation | Expansion joint and compression system |
| CN204358324U (en) * | 2014-12-25 | 2015-05-27 | 大连船舶重工集团有限公司 | Based on the flexible expansion joint controlling excessive deformation mechanism |
| CN206702914U (en) * | 2017-04-12 | 2017-12-05 | 中国神华能源股份有限公司 | A kind of expansion joint dismantling device |
| CN108145652A (en) * | 2017-11-20 | 2018-06-12 | 沪东中华造船(集团)有限公司 | A kind of large size expansion pipe installation method |
| CN108247574A (en) * | 2017-12-26 | 2018-07-06 | 渤海造船厂集团有限公司 | A kind of adjusting bellows installing/dismounting method |
| CN109895030A (en) * | 2019-04-08 | 2019-06-18 | 沈阳晨光弗泰波纹管有限公司 | The big displacement Compression and Expansion method of Compression and Expansion tooling and expansion joint |
| CN210950387U (en) * | 2019-11-04 | 2020-07-07 | 无锡市华波金属波纹软管有限公司 | Thrust-free corrugated expansion joint |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114952700A (en) * | 2022-07-06 | 2022-08-30 | 上海中船三井造船柴油机有限公司 | Mounting tool and method for expansion joint of marine low-speed diesel engine |
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Application publication date: 20201215 |