CN112498620B - CTD traveling crane installation method - Google Patents
CTD traveling crane installation method Download PDFInfo
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- CN112498620B CN112498620B CN202011451787.5A CN202011451787A CN112498620B CN 112498620 B CN112498620 B CN 112498620B CN 202011451787 A CN202011451787 A CN 202011451787A CN 112498620 B CN112498620 B CN 112498620B
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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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Abstract
The invention provides a CTD crane mounting method, which ensures the mounting requirement and performance exertion of equipment by assembling, lightering and carrying the segments, positioning and welding the equipment and checking the precision quality control of the whole process. The invention has the advantages that through reasonable and effective process procedures and control means, the precision requirement of the CTD crane installation environment is ensured, the reworking and even waste returning caused by the fact that the construction precision does not meet the installation requirement is avoided, and the construction manpower resource and the construction cost are saved. The application of the invention provides technical support and application cases for the installation of similar high-precision marine equipment.
Description
Technical Field
The invention belongs to the technical field of ship manufacturing, and particularly relates to a CTD crane installation method for a scientific research ship.
Background
With the development of ocean exploration technology, especially in recent years, the strategic deployment of exploration and development of oceans has been accelerated by countries. The scientific research ship as a main carrier for the research and research of oceans by human beings also enters a high-speed development stage.
A temperature-salinity-depth comprehensive profile measuring system (CTD) is basic configuration of a marine scientific research ship, and a CTD traveling crane is a special facility for collecting and releasing the CTD. The ideal installation mode of the CTD travelling crane is that a cross beam is arranged above a travelling crane guide rail, and the cross beam and a ship deck truss are fixed in a cross welding mode. This method is relatively easy to control the precision because of the small contact surface and the small welding amount. However, both the CTD and the CTD traveling crane have large volumes, so that the space height requirement during the matching operation is large, and in a limited ship space, the space of a cross beam above a guide rail of the CTD traveling crane cannot be increased. Therefore, more conditions are that the top surface of the whole guide rail of the CTD travelling crane is completely attached to the bottom surface of the deck truss, and the installation precision requirement of the CTD travelling crane is far greater than the construction precision requirement of the hull structure, so that the control difficulty of the construction precision of the hull structure is greatly improved.
Therefore, in order to meet the requirement of installation accuracy of the CTD travelling crane, the installation environment of the CTD travelling crane is ensured to reach an ideal state, and the equipment performance is fully exerted. There is a need to make a scheme for directly fitting and installing a CTD crane guide rail and a deck truss.
Disclosure of Invention
In view of the defects of the prior art, the technical problem to be solved by the present invention is to provide a CTD crane installation method, which provides a technological guidance for deck girder assembly precision, segmental lightering and carrying structural deformation control, and CTD crane guide rail positioning and installation, so as to meet the installation precision requirement of the CTD crane.
In order to achieve the above and other related objects, the present invention provides a CTD crane installation method, including the steps of:
step one, controlling the precision of a sectional construction jig frame:
in the sectional assembling and assembling stage, replacing the conventional jig support with channel steel at the jig at the corresponding position of the deck truss, and controlling the precision of the sectional outer plate at the installation position of the CTD crane guide rail and the assembling datum plane of the deck truss;
step two, controlling the precision of deck truss assembly:
when the deck truss is assembled, assembling and welding are carried out according to a ship body welding process, and the precision change is monitored in real time, so that large welding deformation is prevented;
step three, controlling the lightering/carrying deformation:
after the sectional assembly molding, except for the conventional anti-deformation reinforcing auxiliary material, temporarily reinforcing the surface of the deck truss material and the deck surface at the corresponding position by using channel steel to control the structural deformation in the sectional turning-over and carrying processes;
fourthly, performing precision rechecking before installation:
the manufacturing precision of a CTD travelling crane guide rail and the planeness of a deck truss are rechecked;
step five, positioning a CTD crane:
firstly, removing temporary channel steel reinforcement on the bottom surface of a deck truss, positioning guide rails, adjusting the parallelism, the position degree and the flatness of the two guide rails by using a tool, and performing spot welding and fixing after the two guide rails are adjusted in place;
step six, welding and checking a CTD crane:
welding the guide rail according to a ship welding procedure, monitoring the precision change of the guide rail, and performing corresponding nondestructive inspection according to a welding form after welding;
step seven, installation of accessories:
and assembling the suspension arm of the CTD travelling crane, and installing hydraulic, electric and other accessories.
Preferably, the specification of the channel steel in the first step is not less than that of the CTD crane guide rail.
Preferably, if the precision is out of tolerance in the fourth step, the correction is performed.
Preferably, in the first step, the common column type jig frame is replaced by a horizontal channel steel which is arranged in a groined shape.
Preferably, the CTD crane guide rail precision is rechecked in the fourth step, and the flatness of the CTD crane guide rail is ensured to be within 2/2000, and the straightness is ensured to be within 5/2000.
Preferably, the deck rail flatness is reviewed in step four to within 3/1000.
Preferably, the deformation of the guide rail is monitored in the welding process of the step six, and if the out-of-tolerance occurs, reverse welding is needed to make up.
Preferably, the temporary channel steel reinforcement at one side of the segmented outer plate is removed after the seventh accessory is installed.
As described above, the CTD crane installation method according to the present invention has the following advantageous effects: the precision quality control of the whole process of sectional assembly, lightering and carrying, equipment positioning, welding and inspection is carried out, and the installation requirement and performance exertion of the equipment are ensured. According to the invention, through reasonable and effective process procedures and control means, the precision requirement of the CTD crane installation environment is ensured, the reworking and even waste returning caused by the fact that the construction precision does not meet the installation requirement is avoided, and the construction manpower resource and the construction cost are saved. The application of the invention provides technical support and application cases for the installation of similar high-precision marine equipment.
Drawings
FIG. 1 is a diagram of a structural assembly shelf accuracy control scheme according to an embodiment of the present invention;
FIG. 2 is a sequence of welding of the deck rail/CTD trolley rail according to an embodiment of the present invention;
FIG. 3 is a diagram of a structure segment accuracy control scheme according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a positioning control scheme of a guide rail of a CTD crane according to an embodiment of the present invention.
Description of reference numerals:
1 jig frame
2 channel steel
11 truss guide rail
101 segmentation
102 Deck truss
103 temporary channel steel
111 guide rail.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1 to 4. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or through an intermediate medium, or both elements may be interconnected. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1 to 4, the invention provides a CTD crane installation method, which comprises the following steps:
firstly, reforming a segmented jig frame:
as shown in fig. 1, in a jig frame used for sectional assembly, at a deck truss position corresponding to a CTD crane guide rail, a common column type jig frame is replaced by a horizontal channel steel which is arranged in a groined shape, the distance between the channel steels is the same as that of the CTD crane guide rail, and the length of the channel steel is not less than the total length of a section. The method comprises the steps of guaranteeing the levelness and the strength of a sectional outer plate and deck truss assembling platform, controlling the precision of a sectional construction jig frame, assembling and assembling in a sectional assembly stage, replacing a conventional jig frame support with a channel steel at a corresponding position of a deck truss, controlling the precision of a sectional outer plate and deck truss assembling datum plane at a CTD travelling crane guide rail installation position by the specification not smaller than a CTD travelling crane guide rail, and preventing structural deformation caused by insufficient strength and undersize supporting surface of the jig frame so as to cause over-precision.
Secondly, assembling deck girders:
as shown in figure 4, when the assembly and assembly are started on the jig frame and the deck girders at the guide rail of the equipment are assembled, the two girders are welded simultaneously and intermittently in a staggered mode according to the process requirement of figure 2, the welding length of each section is more than or equal to 75mm, and the interruption value is less than or equal to 150 mm. Monitoring the flatness of the deck girders in the welding process, performing reverse welding compensation if out-of-tolerance deformation occurs, ensuring that the flatness of the welded deck girders is in 3/1000, controlling the assembly precision of the deck girders, performing assembly welding strictly according to a ship body welding process during the assembly of the deck girders, monitoring the precision change in real time, and preventing large welding deformation.
Thirdly, reinforcing after segmented molding:
as shown in fig. 3, after the sections are assembled and molded, the bottom surface of the deck girder and the corresponding side of the section outer panel are temporarily reinforced with channel steel. The control section generates larger structural deformation in the processes of turning over, lightering and carrying.
Fourthly, precision rechecking before installation:
the precision of a CTD traveling crane guide rail is rechecked, the flatness of the CTD traveling crane guide rail is ensured to be 2/2000, and the straightness of the CTD traveling crane guide rail is ensured to be 5/2000; additionally, the deck beams were reviewed for flatness within 3/1000, as shown in FIG. 4; if the precision is out of tolerance, correction is needed.
Fifthly, positioning of a CTD traveling crane guide rail:
before installation, the total section where the CTD travelling crane is located needs to be closed, and other welding works around the CTD travelling crane need to be completed completely. At the moment, the temporary channel steel reinforcement on the bottom surface of the deck truss is firstly removed.
The CTD traveling crane guide rails are fixed by a tool after being hoisted in place, the position degree between the guide rails is adjusted within +/-2.5 mm, the flatness is adjusted within 2/2000, spot welding positioning is carried out after the guide rails are adjusted in place, the spot welding sequence is shown as ABC marks in figure 2, and the position degree requirement is shown in figure 2.
Sixthly, welding and inspecting a CTD traveling crane guide rail:
the two guide rails are welded intermittently in a staggered mode according to the process requirement of the figure 2, the welding is marked by 123 in the figure 2, the welding length of each section is more than or equal to 75mm, and the intermittent value is less than or equal to 150 mm. And monitoring the deformation of the guide rail in the welding process, and if the out-of-tolerance occurs, making up for the reverse welding. And carrying out nondestructive flaw detection on the welding seam after welding.
Seventhly, mounting accessories:
and assembling the suspension arm of the CTD travelling crane, and installing hydraulic, electric and other accessories, wherein the other accessories are conventional and are not described again.
And finally, removing the temporary channel steel reinforcement on one side of the segmented outer plate.
Through the above steps, the precision of the CTD traveling crane before installation is effectively controlled, and the requirements of various technical indexes are met.
In summary, the CTD crane installation method of the present invention has the following beneficial effects: the precision quality control of the whole process of sectional assembly, lightering and carrying, equipment positioning, welding and inspection is carried out, and the installation requirement and performance exertion of the equipment are ensured. According to the invention, through reasonable and effective process procedures and control means, the precision requirement of the CTD crane installation environment is ensured, the reworking and even waste returning caused by the fact that the construction precision does not meet the installation requirement is avoided, and the construction manpower resource and the construction cost are saved. The application of the invention provides technical support and application cases for the installation of similar high-precision marine equipment.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (8)
1. A CTD traveling crane installation method is characterized by comprising the following steps:
1) and (3) controlling the precision of the sectional building jig:
in the sectional assembling and assembling stage, replacing the conventional jig support with channel steel at the jig at the corresponding position of the deck truss, and controlling the precision of the sectional outer plate at the installation position of the CTD crane guide rail and the assembling datum plane of the deck truss;
2) precision control of deck girder assembly:
when the deck truss is assembled, assembling and welding are carried out according to a ship body welding process, and the precision change is monitored in real time, so that large welding deformation is prevented;
3) controlling the lightering/carrying deformation:
after the sectional assembly molding, except for the conventional anti-deformation reinforcing auxiliary material, temporarily reinforcing the surface of the deck truss material and the deck surface at the corresponding position by using channel steel to control the structural deformation in the sectional turning-over and carrying processes;
4) and (3) rechecking the precision before installation:
the manufacturing precision of a CTD travelling crane guide rail and the planeness of a deck truss are rechecked;
5) and (3) CTD crane positioning:
firstly, removing temporary channel steel reinforcement on the bottom surface of a deck truss, positioning guide rails, adjusting the parallelism, the position degree and the flatness of the two guide rails by using a tool, and performing spot welding and fixing after the two guide rails are adjusted in place;
6) and (3) welding and inspecting a CTD crane:
welding the guide rail according to a ship welding procedure, monitoring the precision change of the guide rail, and performing corresponding nondestructive inspection according to a welding form after welding;
7) installation of accessories:
and assembling the suspension arm of the CTD travelling crane, and installing hydraulic, electric and other accessories.
2. The CTD traveling crane installation method according to claim 1, wherein the CTD traveling crane installation method comprises the following steps: and in the step 1), the specification of the channel steel is not less than that of the CTD travelling crane guide rail.
3. The CTD traveling crane installation method according to claim 1, wherein the CTD traveling crane installation method comprises the following steps: and if the precision is out of tolerance in the step 4), correcting.
4. The CTD traveling crane installation method according to claim 1, wherein the CTD traveling crane installation method comprises the following steps: and in the step 1), the common column type jig frame is replaced by a horizontal channel steel and arranged in a groined shape.
5. The CTD traveling crane installation method according to claim 1, wherein the CTD traveling crane installation method comprises the following steps: and (4) rechecking the precision of the CTD crane guide rail in the step 4) to ensure that the flatness is within 2/2000 and the straightness is within 5/2000.
6. The CTD traveling crane installation method according to claim 1, wherein the CTD traveling crane installation method comprises the following steps: in said step 4) the deck girder flatness is reviewed to be within 3/1000.
7. The CTD traveling crane installation method according to claim 1, wherein the CTD traveling crane installation method comprises the following steps: and 6) monitoring the deformation of the guide rail in the welding process, and if the out-of-tolerance occurs, making up for the reverse welding.
8. The CTD traveling crane installation method according to claim 1, wherein the CTD traveling crane installation method comprises the following steps: and 7) removing the temporary channel steel reinforcement on one side of the segmented outer plate after the accessories are installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011451787.5A CN112498620B (en) | 2020-12-09 | 2020-12-09 | CTD traveling crane installation method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011451787.5A CN112498620B (en) | 2020-12-09 | 2020-12-09 | CTD traveling crane installation method |
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| CN112498620A CN112498620A (en) | 2021-03-16 |
| CN112498620B true CN112498620B (en) | 2021-07-30 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207046754U (en) * | 2017-08-04 | 2018-02-27 | 上海富勋实业有限公司 | A kind of hydrophore locker |
| CN108190759A (en) * | 2017-12-22 | 2018-06-22 | 国家海洋局第海洋研究所 | Protective device is recycled in a kind of dispensing for CTD seawater sampling equipments |
| CN111717347A (en) * | 2020-05-29 | 2020-09-29 | 招商局重工(深圳)有限公司 | Large cutter suction dredger trolley track structure and manufacturing and mounting process |
| CN211813067U (en) * | 2020-02-13 | 2020-10-30 | 广州鸿海海洋技术服务有限公司 | Novel CTD crane |
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2020
- 2020-12-09 CN CN202011451787.5A patent/CN112498620B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207046754U (en) * | 2017-08-04 | 2018-02-27 | 上海富勋实业有限公司 | A kind of hydrophore locker |
| CN108190759A (en) * | 2017-12-22 | 2018-06-22 | 国家海洋局第海洋研究所 | Protective device is recycled in a kind of dispensing for CTD seawater sampling equipments |
| CN211813067U (en) * | 2020-02-13 | 2020-10-30 | 广州鸿海海洋技术服务有限公司 | Novel CTD crane |
| CN111717347A (en) * | 2020-05-29 | 2020-09-29 | 招商局重工(深圳)有限公司 | Large cutter suction dredger trolley track structure and manufacturing and mounting process |
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| CN112498620A (en) | 2021-03-16 |
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