CN108100898B - Dismounting device and dismounting method for A-shaped frame of offshore platform crane - Google Patents
Dismounting device and dismounting method for A-shaped frame of offshore platform crane Download PDFInfo
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- CN108100898B CN108100898B CN201711396425.9A CN201711396425A CN108100898B CN 108100898 B CN108100898 B CN 108100898B CN 201711396425 A CN201711396425 A CN 201711396425A CN 108100898 B CN108100898 B CN 108100898B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
- B66C23/36—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
- B66C23/52—Floating cranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
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Abstract
The invention belongs to the technical field of offshore platform cranes, and discloses a dismounting device and a dismounting method for an A-shaped frame of an offshore platform crane, wherein the dismounting device comprises a placing frame and a dismounting frame; the placing rack is arranged at a proper position in front of the A-shaped rack and below the suspension arm, and the bottom of the placing rack is welded with the deck of the platform; the disassembly and assembly frame is arranged at the rear part of the A-shaped frame and is fixedly connected with the lifting lug plate of the general column and the large hook roller base; the rack is used with the dismouting frame cooperation for pull down the A-frame through the chain block, park and resume the righting through the chain block to the A-frame. The invention solves the environmental requirement of using the floating crane and the uncertainty of the construction period; the high cost of the floating crane is solved, and the maintenance cost is reduced; the risk of the A-shaped frame dismounting work is reduced, and the smooth drilling and well repairing work and the safe application of the offshore platform crane are ensured.
Description
Technical Field
The invention belongs to the technical field of offshore platform cranes, and particularly relates to a dismounting device and a dismounting method for an A-shaped frame of an offshore platform crane.
Background
As shown in fig. 1 and 2, the offshore platform crane is special equipment with higher top deck positions of the offshore platform, and for some platforms without drilling and repairing capabilities, the drilling platform is needed to be used in drilling and repairing operations. The A-shaped frame of the offshore platform crane is higher, and the drilling platform can interfere with the A-shaped frame when approaching to the platform, so that the A-shaped frame is required to be dismantled and laid horizontally during drilling and workover operation.
At present, the dismounting work of the A-shaped frame of the offshore platform crane is carried out by adopting a floating crane, the floating crane is adopted for the floating crane, the cost is high, the environmental impact is large, the construction period is uncontrollable, and the risk coefficient is high. Therefore, it is urgent to design a device for dismounting the a-frame of the offshore platform crane.
Disclosure of Invention
In order to avoid the environmental requirement and the construction period uncertainty of the floating crane and reduce the cost of the crane A-frame dismounting operation, the invention provides the offshore platform crane A-frame dismounting device and the dismounting method, which thoroughly change the restriction of the environment to the A-frame dismounting operation, make up the defect that the floating crane can only be used in the past, greatly reduce the risk and cost caused by the use of the floating crane, and can be popularized and applied on similar ocean platforms.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the dismounting device for the A-shaped frame of the offshore platform crane comprises a placing frame (5) and a dismounting frame (6) which are matched, wherein the placing frame 5 is arranged in front of the A-shaped frame (1), the dismounting frame (6) is arranged at the rear of the A-shaped frame (1), and the placing frame (5) and the dismounting frame (6) are respectively provided with a chain block for dismounting and mounting the A-shaped frame (1);
the placing frame (5) is an A-shaped tetrahedron frame structure formed by sequentially connecting an A-shaped frame parking beam (501), a suspension arm placing frame (502), a height-adjustable frame (503) and a welding bracket (504) from top to bottom; the A-shaped frame parking beam (501) is used for parking the toppled A-shaped frame (1); one end of the A-shaped frame parking beam (501) is rotationally connected with the suspension arm placing frame (2) on one side through a tapered roller bearing (506), and the other end of the A-shaped frame parking beam is fixedly connected with the suspension arm placing frame (2) on the other side through a bolt (507); the lower part of the A-shaped frame parking beam (501) is connected with the suspension arm placing frames (502) of the A-shaped frame structure through bolts, the two suspension arm placing frames (502) are respectively arranged at two ends of the A-shaped frame parking beam (501) and are parallel to each other, and the A-shaped frame parking beam (501) and the suspension arm placing frames (502) form a space through which the suspension arm (2) can pass; the lower parts of the two suspension arm placing frames (502) are connected with the height-adjustable frames (503) through bolts, the height-adjustable frames (503) are formed by assembling two rows of two columns of main body brackets, a horizontal support (508) and a cross inclined support (510) are arranged between the two horizontal rows of main body brackets, and a horizontal support (509) and a cross inclined support (510) are arranged between the two longitudinal columns of main body brackets; the lower end of the height-adjustable frame (503) is connected with a welding bracket (504), and the welding bracket (504) is welded and fixed with the platform deck;
the dismounting frame (6) comprises a lifting beam (601), a fixing plate (602), a general column connecting plate (603) and a connecting beam; the lifting beam (601) is positioned at the top of the dismounting frame (6), and a lifting lug for hanging a chain block is arranged on the lifting beam (601); the fixing plate (602) is positioned in the middle of the dismounting frame (6), and the fixing plate (602) is arranged on the hook roller base (4); the general column connecting plate (603) is positioned at the bottom of the dismounting frame (6), and the general column connecting plate (603) is arranged on the general column lifting lug plate (3); the connecting beam connects the lifting beam (601), the fixing plate (602) and the general column connecting plate (603) into a frame body.
The top surface of the A-shaped frame parking beam (501) is provided with a protection pad (505) which is used for being contacted with the A-shaped frame (1).
The height-adjustable frame (503) is formed by connecting a lower height-adjustable frame component and a higher height-adjustable frame component.
The transverse support (508), the longitudinal support (509) and the inclined support (510) of the height-adjustable frame (503) are connected with the main body support of the height-adjustable frame (503) through paired ear plates arranged at the ends.
The two ends of the lifting beam (601) and the two ends of the fixing plate (602) are respectively connected by a first oblique beam (606), two vertical beams (604) are respectively connected to the two ends of the lifting beam (601), a cross beam (605) is respectively connected to the two ends of the fixing plate (602), and two first oblique beams (606), two vertical beams (604) and two cross beams (605) respectively form two right-angle triangle frames; a second oblique beam (607) is connected between the general column connecting plate (603) and the connecting node of the vertical beam (604) and the cross beam (605); auxiliary beams (608) are respectively connected between the first inclined beams (606) and the vertical beams (604) and between the two vertical beams (604), and auxiliary beams (608) are connected between the second inclined beams (607) and the transverse beams (605).
Wherein, the vertical beam (604), the first oblique beam (606) and the second oblique beam (607) are all arranged to be of a segmented structure.
The beam (605), the first oblique beam (606), the second oblique beam (607) and the auxiliary beam (608) are provided with paired lug plates at two ends, and are connected with other connecting beams through the lug plates.
The dismounting method for the dismounting device for the A-shaped frame of the offshore platform crane comprises the following steps of:
after the placement frame (5) and the dismounting frame (6) are assembled, the placement frame (5) is mounted on a platform deck below the suspension arm (2), the dismounting frame (6) is connected with the hook roller base (4) through a fixing plate (602) by bolts, and a general column connecting plate (603) is connected with the general column lifting lug plate (3) by bolts;
(2) Opening the A-shaped frame parking beam (501) to enable the suspension arm (2) to penetrate through the suspension arm placing frame (502);
(3) Closing the A-shaped frame parking beam (501), winding one hanging strip on two sides of the A-shaped frame parking beam (501), and hanging a chain block on each hanging strip respectively;
(4) Winding a hanging strip on two sides of the top of the main beam at the front side of the A-shaped frame (1) respectively, and correspondingly connecting the hanging strip with the chain block in the step (2);
(5) Hanging a chain block on lifting lugs on two sides of the lifting beam (601) respectively;
(6) Winding a hanging strip on two sides of the top of the main beam at the rear side of the A-shaped frame (1) respectively, and correspondingly connecting the hanging strip with the chain block in the step (5);
(7) After all the chain blocks and the hanging strips are connected, pre-tightening the chain blocks to ensure that each chain block is in a stressed state;
(8) When the dismounting device is dismounted, firstly, the two connecting pin shafts on the rear side of the A-shaped frame (1) are dismounted, then the chain between the placing frame (5) and the A-shaped frame (1) is gradually tensioned, and meanwhile, the chain between the dismounting frame (6) and the A-shaped frame (1) is gradually loosened, so that the A-shaped frame (1) gradually tilts towards the placing frame (5) by taking the two connecting pin shafts on the front side of the A-shaped frame as the center until the A-shaped frame is parked on the A-shaped frame parking beam (501), and the dismounting work is completed;
(9) When the assembly and disassembly frames (6) are restored to be right, the chain block between the assembly and disassembly frames (6) and the A-shaped frames (1) is gradually tensioned, meanwhile, the chain block between the placing frames (5) and the A-shaped frames (1) is gradually loosened, the A-shaped frames (1) are gradually rotated towards the assembly and disassembly frames (6) by taking two connecting pin shafts on the front sides of the A-shaped frames as centers, until the A-shaped frames (1) are restored to the initial positions, then the two connecting pin shafts on the rear sides of the A-shaped frames (1) are restored to be connected, and the work is completed;
(10) After the A-shaped frame (1) is restored to be righted, all the chain blocks and the hanging strips are removed, the placing frame (5) and the dismounting frame (6) are removed, and the offshore platform crane is restored to a normal use state.
The beneficial effects of the invention are as follows:
the dismounting device and the dismounting method for the A-shaped frame of the offshore platform crane can replace the operation of dismounting the A-shaped frame of the crane by a floating crane, and can realize the operation of dismounting most of the A-shaped frame of the crane in the Bohai sea region by adjusting the height, so that the adaptability is high. The device adopts a portable sectional design, and the placing frame and the dismounting frame can be assembled by adopting simple manual work or setting up a scaffold; after the whole rack is installed in place, the A-shaped rack parking rack is opened by utilizing the rotation design of the A-shaped rack parking rack, so that the function of placing the suspension arm into the suspension arm rack is realized, and meanwhile, a chain block can be hung on the rack, so that the lifting capacity is realized; the welding bracket is welded and fixed with the platform deck, so that the stability and the strength of the whole tooling are ensured; the dismounting frame is connected with the large hook roller base through the fixing plate by bolts, and is connected with the lifting lug plate of the general column through the general column connecting plate by bolts, so that the damage to the main structure caused by welding on the main structure of the crane is avoided.
The dismounting device and the dismounting method for the A-shaped frame of the offshore platform crane solve the environmental requirement of using the floating crane and the uncertainty of the construction period; the high cost of the floating crane is solved, and the maintenance cost is reduced; the risk of the A-shaped frame dismounting work is reduced, and the smooth drilling and well repairing work and the safe application of the offshore platform crane are ensured.
Drawings
FIG. 1 is a schematic elevational view of an offshore platform crane;
FIG. 2 is a schematic diagram of a left-hand construction of an offshore platform crane;
FIG. 3 is a schematic diagram of the front view of the assembly and disassembly device for A-frame of offshore platform crane according to the present invention;
FIG. 4 is a schematic left-hand view of the assembly and disassembly device of the A-frame of the offshore platform crane;
FIG. 5 is a schematic elevational view of the rack of the present invention;
FIG. 6 is a schematic left-hand view of the rack of the present invention;
FIG. 7 is a schematic elevational view of the removable rack of the present invention;
FIG. 8 is a schematic left-hand structural view of the dismounting frame of the invention;
fig. 9 is a schematic diagram showing a state in which the a-frame 1 is pulled down by the a-frame attaching/detaching device of the offshore platform crane according to the present invention.
In the above figures: 1. a-shaped frame; 2. a suspension arm; 3. lifting the armpost to the lug plate; 4. a hook roller base; 5. the lifting device comprises a rack, a rack parking beam 501, an A-shaped rack, a rack hanging arm rack, a rack 503, a height-adjustable rack 504, a welding bracket, a rack 505, a protection pad 506, tapered roller bearings, 507, bolts 508, a transverse support, 509 and a longitudinal support; 6. the frame is disassembled and assembled, 601, lifting beams, 602, fixing plates, 603, general column connecting plates, 604, vertical beams, 605, cross beams, 606, first inclined beams, 607, second inclined beams, 608 and auxiliary beams.
Detailed Description
For a further understanding of the nature, features, and effects of the present invention, the following examples are set forth to illustrate, and are to be considered in connection with the accompanying drawings:
as shown in fig. 1 and 2, an a-frame 1 of the offshore platform crane is installed at the upper part of a general column, and the a-frame 1 is an a-tetrahedron frame structure, and is a longitudinal a-frame structure and a transverse rectangular frame structure. The bottom of the A-shaped frame 1 is fixed with the general column through four pin shafts. The front side of the general column is provided with a suspension arm 2, the suspension arm 2 is of a rectangular frame structure, and the root of the suspension arm 2 is fixed with the general column through a pin shaft. The rear side of the general post is welded with a general post lifting lug plate 3, the top surface of the general post is welded with a hook roller base 4, and the hook roller base 4 is used for connecting a hook roller through bolts.
As shown in fig. 3 and 4, the embodiment provides a dismounting device for a carriage of an offshore platform crane, which comprises a carriage 5 and a dismounting frame 6 which are matched for use. The rack 5 is installed in the place ahead of A word frame 1, the proper position of davit 2 below, and dismouting frame 6 is installed in A word frame 1 rear, and rack 5 and dismouting frame 6 are installed the chain down respectively and are demolishd and install the operation to A word frame.
The rack 5 is used in cooperation with the dismounting frame 2 and is used for pulling the A-shaped frame 1 down through the chain block, parking and restoring and righting the A-shaped frame 1 through the chain block 6, and the bottom of the rack 5 is welded with a platform deck.
As shown in fig. 5 and 6, the placement frame 5 is an a-shaped tetrahedron frame structure formed by sequentially connecting an a-shaped frame parking beam 501, a boom placement frame 502, a height-adjustable frame 503 and a welding bracket 504 from top to bottom, and is of a longitudinal a-shaped frame structure and a transverse rectangular frame structure. The a-frame parking beams 501 are arranged in the transverse direction for directly parking the toppled a-frame 1. The top surface laminating of A frame parking roof beam 501 is provided with the protection pad 505 that is used for contacting with A frame 1, and protection pad 505 adopts the rubber pad to make. One end of the A-shaped frame parking beam 501 is rotationally connected with the boom placing frame 2 on one side through a tapered roller bearing 506, the other end of the A-shaped frame parking beam 501 is fixedly connected with the boom placing frame 2 on the other side through a bolt 507, and the A-shaped frame parking beam 501 can rotate on a horizontal plane by taking the tapered roller bearing 506 as a center after the bolt 507 is loosened, so that the A-shaped frame parking beam 501 is in an opened or closed state, and the boom 2 is convenient to enter and exit. Meanwhile, a hanging belt and a chain block can be hung on the A-shaped frame parking beam 501, so that lifting capacity is realized. The suspension arm placing frames 502 are of an A-shaped frame structure, the top ends of the two suspension arm placing frames 502 are welded to the two ends of the A-shaped frame parking beam 501 respectively, and the two suspension arm placing frames 502 are parallel to each other. The a-frame parking beam 501 and the boom rest 502 form a space through which the boom 2 can pass. The adjustable height frame 503 includes one or two adjustable height frame components, the adjustable height frame component is divided into two kinds of 2.5 m height and 3.5 m height, the adjustable height frame 503 can adopt the adjustable height frame component of 2.5 m height alone or adopt the adjustable height frame component of 3.5 m height alone, also can be by the connection of the adjustable height frame component of 2.5 m height and the adjustable height frame component of 3.5 m height to form, consequently, the adjustable height frame 503 can select suitable height according to the davit 2 of different height. In this embodiment, the height-adjustable frame 503 is divided into two sections, and is composed of a section of 2.5 m height-adjustable frame assembly and a section of 3.5 m height-adjustable frame assembly. Each section of the height-adjustable frame 503 is formed by assembling two rows and two columns of main body brackets, a horizontal support 508 and a cross inclined support 510 are arranged between the two horizontal rows of main body brackets, and a horizontal longitudinal support 509 and a cross inclined support 510 are arranged between the two longitudinal columns of main body brackets. The lateral support 508, the longitudinal support 509 and the diagonal support 510 are each connected to the main body bracket of the height-adjustable frame 503 by end-disposed pairs of ear panels. The sectional design of the height-adjustable frame 503 can adapt to the dismounting work of the A-shaped frame 1 of cranes with different heights, and has strong adaptability. The lower extreme at two davit racks 502 is connected to adjustable height frame 503, and welding bracket 504 is connected to the lower extreme of adjustable height frame 503, and welding bracket 504 is used for rack 5 and platform deck welded fastening, can guarantee rack 5's stability and intensity.
The dismounting frame 6 is matched with the placing frame 5 for pulling the A-shaped frame 1 down and restoring and righting the A-shaped frame 1 through a chain block, the root of the dismounting frame 6 is connected with the lifting lug plate 3 of the general column through bolts, and the middle part of the dismounting frame is connected with the hook roller base 4 through bolts.
As shown in fig. 7 and 8, the dismounting frame 6 includes a lifting beam 601, a fixing plate 602, a general post connecting plate 603, and a connecting beam. The lifting beam 601 is arranged transversely and is positioned at the top of the dismounting frame 6, and lifting lugs for hanging the chain hoist are arranged on the lifting beam 601. The fixing plate 602 is arranged transversely and is positioned in the middle of the dismounting frame 6, and the fixing plate 602 is arranged on the hook roller base 4 and is used for positioning the dismounting frame 6. The fixing plate 602 is arranged to be connected with the hook roller base 4 through the foundation bolts for fixing, so that damage to the main structure caused by welding and fixing on the main structure of the crane is avoided. The general column connecting plate 603 comprises two transverse symmetrically arranged connecting plates and is positioned at the bottom of the dismounting frame 6, and the connecting plates are both arranged on the general column lifting lug plate 3 and used for positioning the dismounting frame 6. The general column connecting plate 603 is fixedly connected with the general column lifting lug plate 3 through bolts, so that damage to a main structure caused by welding and fixing on the main structure of the crane is avoided. The connecting beams comprise vertical beams 604, cross beams 605, first inclined beams 606, second inclined beams 607 and auxiliary beams 608, and are used for fixedly connecting the lifting beams 601, the fixing plates 602 and the general column connecting plates 603 into a frame body. The two ends of the lifting beam 601 and the two ends of the fixing plate 602 are respectively connected by a first oblique beam 606, the two ends of the lifting beam 601 are respectively connected with a vertical beam 604, the two ends of the fixing plate 602 are respectively connected with a cross beam 605, and the two first oblique beams 606, the two vertical beams 604 and the two cross beams 605 respectively form two right triangle frames in the longitudinal direction. One end of the second diagonal beam 607 is connected to the post connecting plate 603, and the other end is connected to the connection node of the vertical beam 604 and the cross beam 605. A plurality of auxiliary beams 608 are respectively connected between the first inclined beams 606 and the vertical beams 604 and between the two vertical beams 604, a plurality of auxiliary beams 608 are connected between the second inclined beams 607 and the cross beam 605, and the auxiliary beams 608 are used for fixing the connecting beams, so that the stability of the whole structure is ensured. The vertical beams 604 are arranged into a segmented structure, each segment is 2.2 meters, and manual carrying and assembly are facilitated. The first inclined beam 606 and the second inclined beam 607 are arranged into a split structure, and each segment is 3 meters, so that the manual carrying and the assembly are convenient. The two ends of the cross beam 605, the first inclined beam 606, the second inclined beam 607 and the auxiliary beam 608 are respectively provided with a pair of lug plates, and the lug plates are connected with other connecting beams.
The device adopts a portable sectional design, and the placement frame 5 and the disassembly and assembly frame 6 can be assembled by adopting simple manual work or setting up a scaffold.
As shown in fig. 9, the method for attaching and detaching the a-frame of the offshore platform crane is carried out by the following steps:
(1) After the assembly of the placing frame 5 and the dismounting frame 6 is completed, the placing frames are respectively placed at the appointed positions: the placing frame 5 is arranged on a platform deck below the suspension arm 2, and the bottom of the placing frame is fixed with the platform deck in a welding mode; the dismounting frame 6 is connected with the hook roller base 4 through a fixing plate 602 by bolts, and is connected with the general post lifting lug plate 3 through a general post connecting plate 603 by bolts;
(2) The A-shaped frame parking beam 501 is opened by rotating, and the suspension arm 2 passes through the suspension arm placing frame 502;
(3) Closing the A-frame parking beam 501 by rotating, winding one hanging strip on each side of the A-frame parking beam 501, and hanging a chain block on each hanging strip;
(4) Winding a hanging strip on two sides of the top of the main beam at the front side of the A-shaped frame 1 respectively, and correspondingly connecting the hanging strip with the chain block in the step (2);
(5) A shackle is respectively arranged on the lifting lugs at two sides of the lifting beam 601, and a chain block is hung on each shackle;
(6) Winding a hanging strip on two sides of the top of the main beam at the rear side of the A-shaped frame 1 respectively, and correspondingly connecting the hanging strip with the chain block in the step (5);
(7) After all the chain blocks and the hanging strips are connected, pre-tightening the chain blocks to ensure that each chain block is in a stressed state;
(8) Removing two connecting pin shafts on the rear side of the A-shaped frame 1;
(9) The chain block between the placing frame 5 and the A-shaped frame 1 is gradually tensioned, and meanwhile the chain block between the dismounting frame 6 and the A-shaped frame 1 is gradually loosened, so that the A-shaped frame 1 is guaranteed to slowly perform circular motion by taking two connecting pin shafts on the front side of the A-shaped frame as the center, gradually topples over towards the placing frame 5 until the A-shaped frame is parked on the A-shaped frame parking beam 501, and the dismounting work is completed;
(10) The step of restoring the centering is opposite to that of dismantling, the chain block between the disassembly and assembly frame 6 and the A-shaped frame 1 is gradually tensioned, meanwhile, the chain block between the placement frame 5 and the A-shaped frame 1 is gradually released, the A-shaped frame 1 is guaranteed to slowly perform circular motion by taking two connecting pin shafts on the front side of the A-shaped frame as the center, the A-shaped frame gradually rotates towards the disassembly and assembly frame 6 until the A-shaped frame 1 is restored to the initial position, then the two connecting pin shafts on the rear side of the A-shaped frame 1 are restored to be connected, and the restoring work is completed;
(11) After the A-shaped frame 1 is restored to be righted, all the chain blocks and hanging strips are removed, the placing frame 5 and the dismounting frame 6 are removed, and the offshore platform crane is restored to a normal use state.
Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative, not restrictive, and many changes may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the appended claims, which are to be construed as falling within the scope of the present invention.
Claims (6)
1. The dismounting method for the A-shaped frame of the offshore platform crane is characterized by comprising a dismounting device for the A-shaped frame of the offshore platform crane, wherein the dismounting device comprises a placing frame (5) and a dismounting frame (6) which are matched with each other, the placing frame (5) is arranged in front of the A-shaped frame (1), the dismounting frame (6) is arranged behind the A-shaped frame (1), and the placing frame (5) and the dismounting frame (6) are respectively provided with a chain block for dismounting and mounting the A-shaped frame (1);
the placing frame (5) is an A-shaped tetrahedron frame structure formed by sequentially connecting an A-shaped frame parking beam (501), a suspension arm placing frame (502), a height-adjustable frame (503) and a welding bracket (504) from top to bottom; the A-shaped frame parking beam (501) is used for parking the toppled A-shaped frame (1); one end of the A-shaped frame parking beam (501) is rotationally connected with the suspension arm placing frame (502) on one side through a tapered roller bearing (506), and the other end of the A-shaped frame parking beam is fixedly connected with the suspension arm placing frame (502) on the other side through a bolt (507); the lower part of the A-shaped frame parking beam (501) is connected with the suspension arm placing frames (502) of the A-shaped frame structure through bolts, the two suspension arm placing frames (502) are respectively arranged at two ends of the A-shaped frame parking beam (501) and are parallel to each other, and the A-shaped frame parking beam (501) and the suspension arm placing frames (502) form a space through which the suspension arm (2) can pass; the lower parts of the two suspension arm placing frames (502) are connected with the height-adjustable frames (503) through bolts, the height-adjustable frames (503) are formed by assembling two rows of two columns of main body brackets, a horizontal support (508) and a cross inclined support (510) are arranged between the two horizontal rows of main body brackets, and a horizontal support (509) and a cross inclined support (510) are arranged between the two longitudinal columns of main body brackets; the lower end of the height-adjustable frame (503) is connected with a welding bracket (504), and the welding bracket (504) is welded and fixed with the platform deck;
the dismounting frame (6) comprises a lifting beam (601), a fixing plate (602), a general column connecting plate (603) and a connecting beam; the lifting beam (601) is positioned at the top of the dismounting frame (6), and a lifting lug for hanging a chain block is arranged on the lifting beam (601); the fixing plate (602) is positioned in the middle of the dismounting frame (6), and the fixing plate (602) is arranged on the hook roller base (4); the general column connecting plate (603) is positioned at the bottom of the dismounting frame (6), and the general column connecting plate (603) is arranged on the general column lifting lug plate (3); the connecting beam connects the lifting beam (601), the fixing plate (602) and the general column connecting plate (603) into a frame body;
the disassembly and assembly method comprises the following steps:
after the placement frame (5) and the dismounting frame (6) are assembled, the placement frame (5) is mounted on a platform deck below the suspension arm (2), the dismounting frame (6) is connected with the hook roller base (4) through a fixing plate (602) by bolts, and a general column connecting plate (603) is connected with the general column lifting lug plate (3) by bolts;
(2) Opening the A-shaped frame parking beam (501) to enable the suspension arm (2) to penetrate through the suspension arm placing frame (502);
(3) Closing the A-shaped frame parking beam (501), winding one hanging strip on two sides of the A-shaped frame parking beam (501), and hanging a chain block on each hanging strip respectively;
(4) Winding a hanging strip on two sides of the top of the main beam at the front side of the A-shaped frame (1) respectively, and correspondingly connecting the hanging strip with the chain block in the step (2);
(5) Hanging a chain block on lifting lugs on two sides of the lifting beam (601) respectively;
(6) Winding a hanging strip on two sides of the top of the main beam at the rear side of the A-shaped frame (1) respectively, and correspondingly connecting the hanging strip with the chain block in the step (5);
(7) After all the chain blocks and the hanging strips are connected, pre-tightening the chain blocks to ensure that each chain block is in a stressed state;
(8) When the dismounting device is dismounted, firstly, the two connecting pin shafts on the rear side of the A-shaped frame (1) are dismounted, then the chain between the placing frame (5) and the A-shaped frame (1) is gradually tensioned, and meanwhile, the chain between the dismounting frame (6) and the A-shaped frame (1) is gradually loosened, so that the A-shaped frame (1) gradually tilts towards the placing frame (5) by taking the two connecting pin shafts on the front side of the A-shaped frame as the center until the A-shaped frame is parked on the A-shaped frame parking beam (501), and the dismounting work is completed;
(9) When the assembly and disassembly frames (6) are restored to be right, the chain block between the assembly and disassembly frames (6) and the A-shaped frames (1) is gradually tensioned, meanwhile, the chain block between the placing frames (5) and the A-shaped frames (1) is gradually loosened, the A-shaped frames (1) are gradually rotated towards the assembly and disassembly frames (6) by taking two connecting pin shafts on the front sides of the A-shaped frames as centers, until the A-shaped frames (1) are restored to the initial positions, then the two connecting pin shafts on the rear sides of the A-shaped frames (1) are restored to be connected, and the work is completed;
(10) After the A-shaped frame (1) is restored to be righted, all the chain blocks and the hanging strips are removed, the placing frame (5) and the dismounting frame (6) are removed, and the offshore platform crane is restored to a normal use state.
2. The dismounting method for the a-frame of the offshore platform crane according to claim 1, wherein the top surface of the a-frame parking beam (501) is provided with a protection pad (505) for contacting with the a-frame (1).
3. The method for dismounting the a-frame of the offshore platform crane according to claim 1, wherein the height-adjustable frame (503) is formed by connecting a lower height-adjustable frame assembly with a higher height-adjustable frame assembly.
4. The method for dismounting the a-frame of the offshore platform crane according to claim 1, wherein the transverse support (508), the longitudinal support (509) and the diagonal support (510) of the height-adjustable frame (503) are all connected with the main body bracket of the height-adjustable frame (503) through paired lug plates arranged at the ends.
5. The dismounting method for the a-frame of the offshore platform crane according to claim 1, wherein two ends of the lifting beam (601) and two ends of the fixing plate (602) are respectively connected by a first oblique beam (606), two ends of the lifting beam (601) are respectively connected with a vertical beam (604), two ends of the fixing plate (602) are respectively connected with a cross beam (605), and the two first oblique beams (606), the two vertical beams (604) and the two cross beams (605) respectively form two right-angle triangle frames; a second oblique beam (607) is connected between the general column connecting plate (603) and the connecting node of the vertical beam (604) and the cross beam (605); auxiliary beams (608) are respectively connected between the first inclined beams (606) and the vertical beams (604) and between the two vertical beams (604), and auxiliary beams (608) are connected between the second inclined beams (607) and the transverse beams (605).
6. The method for dismounting the a-frame of the offshore platform crane according to claim 5, wherein the vertical beam (604), the first diagonal beam (606) and the second diagonal beam (607) are all provided in a segmented structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711396425.9A CN108100898B (en) | 2017-12-21 | 2017-12-21 | Dismounting device and dismounting method for A-shaped frame of offshore platform crane |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711396425.9A CN108100898B (en) | 2017-12-21 | 2017-12-21 | Dismounting device and dismounting method for A-shaped frame of offshore platform crane |
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| CN108100898A CN108100898A (en) | 2018-06-01 |
| CN108100898B true CN108100898B (en) | 2023-06-23 |
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| CN113548592B (en) * | 2021-06-30 | 2024-05-24 | 广州文冲船舶修造有限公司 | Construction method of crane boom bracket |
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| CN201458596U (en) * | 2009-08-14 | 2010-05-12 | 河北省电力建设第一工程公司 | Crane with self-dismounting device |
| CN201574053U (en) * | 2009-12-16 | 2010-09-08 | 中船华南船舶机械有限公司 | Bottle-neck marine crane |
| CN102267668A (en) * | 2010-06-04 | 2011-12-07 | 上海三一科技有限公司 | Folding guide device of rear pull rod of A-shaped frame |
| CN208135770U (en) * | 2017-12-21 | 2018-11-23 | 中海油能源发展股份有限公司 | A kind of offshore platform crane A cabinet frame attaching/detaching apparatus |
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