CN107010179B - Clamping mechanism of buoyancy device of deepwater vertical pipe - Google Patents
Clamping mechanism of buoyancy device of deepwater vertical pipe Download PDFInfo
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- CN107010179B CN107010179B CN201710301446.1A CN201710301446A CN107010179B CN 107010179 B CN107010179 B CN 107010179B CN 201710301446 A CN201710301446 A CN 201710301446A CN 107010179 B CN107010179 B CN 107010179B
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- locking mechanism
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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
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
Abstract
The invention provides a clamping mechanism of a buoyancy device of a deepwater vertical pipe, which comprises a clamp frame, a rear movable clamp, a front movable upper clamp, a front movable lower clamp right locking mechanism, a front movable lower clamp left locking mechanism, a rear movable clamp locking mechanism and a front movable upper clamp locking mechanism, wherein the clamping mechanism is connected to the buoyancy device of the vertical pipe through a U-shaped load guide rail on the clamp frame, and a fixing plate of the clamping mechanism is fixed with the buoyancy device of the vertical pipe by bolts so as to prevent the clamping mechanism from falling off; the invention holds the riser stress ring through the riser stress surface of the clamp frame, the riser stress surface of the rear movable clamp, the riser stress surface of the front movable upper clamp and the riser stress surface of the front movable lower clamp, connects the riser of the TLP platform with the riser buoyancy device, and locks all movable clamps through the locking mechanism, thereby ensuring the connection reliability. The invention has the advantages of simple structure, convenient operation, strong bearing capacity, reliable connection, low manufacturing cost and the like.
Description
Technical Field
The invention relates to a clamping mechanism of a buoyancy device of a deepwater riser, and belongs to the field of ocean platform construction.
Background
With the development of economy and technology, the demand of human beings for resources is continuously increased, and due to the abundance of ocean resources, the development of ocean resources has become an important development direction, and ocean oil gas development is one of the main contents of the ocean development engineering at present. Therefore, offshore oil platforms are becoming the primary device in today's offshore oil and gas development facilities.
In the 80 s of the 20 th century, people find that the tension leg platform has simple structure, compliance and low engineering cost, and meanwhile, the tension leg platform has good stability and safety, so that the tension leg platform is welcomed by people, and many countries begin to research and design the tension leg platform, so that the tension leg platform is rapidly developed. The tension leg platform can be paid attention to because the tension leg platform has the advantages of strong severe environment resistance, good movement performance, low engineering cost and the like. Tension leg platform is a popular ocean platform at present, and the tension leg platform is a main structural form of the ocean platform in a future period.
In order to meet the demands of ocean deepwater operation, research on deepwater platforms is being increased in China, but at present, no tension leg platform exists in the platform which is independently researched and developed in China, and no riser buoyancy device is researched and developed.
Disclosure of Invention
The invention aims to provide a clamping mechanism of a buoyancy device of a deepwater riser, which belongs to a clamping mechanism for connecting the buoyancy device of the riser of a tension leg platform with the riser, and enables the buoyancy device of the riser to be connected with the riser quickly and effectively.
The purpose of the invention is realized in the following way: the clamp comprises a clamp frame with a U-shaped section, a rear movable clamp, a front movable upper clamp, a front movable lower clamp right locking mechanism, a front movable lower clamp left locking mechanism, a rear movable clamp locking mechanism and a front movable upper clamp locking mechanism, wherein a U-shaped load guide rail is arranged at the upper end of the clamp frame, a pair of clamp holding mechanism fixing plates are arranged at the front end of the clamp frame, a clamp frame vertical pipe stress surface which is in contact with a vertical pipe is arranged on the inner surface of the clamp frame, a pair of front movable lower clamp locking wedge sliding grooves are symmetrically arranged on the front end surface of the clamp frame, and a front movable lower clamp right locking mechanism mounting hole and a front movable lower clamp left locking mechanism mounting hole are arranged on two sides of the front end of the clamp frame; the movable clamp comprises a clamp frame, a front movable clamp, a front movable lower clamp, a front movable clamp mounting pin shaft, a front movable lower clamp, a front movable upper clamp and a front movable clamp mounting pin shaft, wherein the rear movable clamp mounting pin shaft is arranged on the rear movable clamp, the rear movable clamp mounting pin shaft is arranged in a rear movable clamp mounting pin shaft arranged on the clamp frame through a rear movable clamp pin shaft, the inner surface of the rear movable clamp is a rear movable clamp vertical pipe stress surface in contact with a vertical pipe, the front movable upper clamp is provided with a front movable upper clamp mounting pin shaft, the front movable lower clamp and the front movable upper clamp share the front movable clamp mounting pin shaft and are arranged in a front movable clamp mounting pin shaft arranged on the clamp frame through the front movable clamp mounting pin shaft, the front movable lower clamp is positioned below the front movable upper clamp, and the inner surface of the front movable upper clamp and the front movable lower clamp are respectively a front movable upper clamp vertical pipe stress surface in contact with the vertical pipe and a front movable lower clamp vertical pipe stress surface.
The invention also has the following characteristics:
1. the front movable lower clamp right locking mechanism, the front movable lower clamp left locking mechanism, the rear movable lower clamp locking mechanism and the front movable upper clamp locking mechanism all comprise locking sleeves, push rods arranged in the locking sleeves, locking wedge blocks arranged at one ends of the push rods and locking handles arranged at the other ends of the push rods, one ends of the locking sleeves are threaded ends, the other ends of the locking sleeves are connecting ends, the push rods are in a ladder shape, push rod supporting surfaces matched with the ladder surfaces of the push rods are arranged in the locking handles, locking threads matched with the threaded ends are arranged in the locking handles, the ends of the locking handles of the front movable lower clamp right locking mechanism and the front movable lower clamp left locking mechanism are respectively provided with a front movable lower clamp unlocking ROV operating handle, the connecting ends of the locking sleeves of the front movable lower clamp right locking mechanism are welded in right locking mechanism mounting holes of the front movable lower clamp, the locking wedge block of the right locking mechanism of the front movable lower clamp slides in a locking wedge block chute of the front movable lower clamp, the connecting end of the locking sleeve of the left locking mechanism of the front movable lower clamp is welded in a left locking mechanism mounting hole of the front movable lower clamp, the locking wedge block of the left locking mechanism of the front movable lower clamp slides in a locking wedge block chute of the other front movable lower clamp, the connecting end of the locking sleeve of the rear movable clamp is welded in a locking mechanism mounting hole of the rear movable clamp, the locking wedge block of the rear movable clamp moves on a rear lower supporting surface of the clamp frame, the locking mechanism mounting hole of the rear movable clamp is arranged at the rear end of the clamp frame, the connecting end of the locking sleeve of the locking mechanism of the front movable upper clamp is welded in a locking mechanism mounting hole of the front movable upper clamp, the locking mechanism mounting hole of the front movable upper clamp is arranged on the front movable lower clamp, the locking wedge of the front movable upper clamp locking mechanism moves on the upper surface of the front movable lower clamp.
Compared with the prior art, the invention has the beneficial effects that: the clamping mechanism is connected to the vertical pipe buoyancy device through the U-shaped load guide rail on the clamp frame, and the clamping mechanism fixing plate and the vertical pipe buoyancy device are fixed through bolts, so that the clamping mechanism is prevented from falling off; the clamping mechanism clamps the riser stress ring through the riser stress surface of the clamp frame, the riser stress surface of the rear movable clamp, the riser stress surface of the front movable upper clamp and the riser stress surface of the front movable lower clamp, thereby realizing the purpose of connecting the TLP platform riser with the riser buoyancy device, locking all movable clamps through the locking mechanism and ensuring the reliability of connection.
The clamping mechanism and the vertical pipe buoyancy device are convenient and reliable to connect and even in stress, and the clamping mechanism and the vertical pipe are connected with each other due to the unique clamping mode of the clamp and the self-locking property of the clamp, so that the clamping mechanism and the vertical pipe have the characteristics of convenience in offshore connection, easiness in implementation, safety, reliability, strong bearing capacity and the like, and have great significance in the research of tension leg platform installation equipment in China.
Drawings
FIG. 1 is a schematic view of a structure of a clamping mechanism when opened;
FIG. 2 is a schematic view of the structure of the front movable lower clamp during locking
FIG. 3 is a schematic view of the structure of the clasping mechanism when closed and locked;
FIG. 4 is a front view of the clasping mechanism in closed and locked;
FIG. 5 is a cross-sectional view A-A of the clasping mechanism closed and locked;
FIG. 6 is a cross-sectional view B-B of the clasping mechanism closed and locked;
FIG. 7 is a cross-sectional view of the clamping mechanism clamping the riser;
FIG. 8 is a schematic top view of a clamp frame;
FIG. 9 is a schematic view of the structure of the bottom view of the clamp frame;
FIG. 10 is a schematic view of the right locking mechanism of the front movable lower clamp;
FIG. 11 is a schematic view of the left locking mechanism of the front movable lower clamp;
FIG. 12 is a schematic view of the structure of the locking mechanism of the rear movable clamp;
FIG. 13 is a schematic view of the front movable upper clamp locking mechanism;
FIG. 14 is a schematic view of the structure of the rear movable clamp;
FIG. 15 is a schematic view of the structure of the front movable upper clamp;
FIG. 16 is a schematic view of the structure of the front movable lower clamp;
FIG. 17 is a cross-sectional view of the front movable lower clamp locking handle structure;
FIG. 18 is a cross-sectional view of the front movable lower clamp locking handle locked;
in the figure: 1 a clamp frame, 11U-shaped load guide rails, 12 a clamping mechanism fixing plate, 13 a front movable lower clamp locking wedge sliding groove, 14 a clamp frame vertical pipe stress surface, 15 a front movable clamp mounting shaft hole, 16 a front movable lower clamp right locking mechanism mounting hole, 17 a clamp frame front lower support surface, 18 a clamp frame upper support surface, 19 a clamp frame rear movable clamp mounting shaft hole, 110 a rear movable clamp locking mechanism mounting hole, 111 a front movable lower clamp left locking mechanism mounting hole, 112 a clamp frame rear lower support surface, 2 a rear movable clamp, 21 a rear movable clamp vertical pipe stress surface, 22 a rear movable clamp wedge stress surface, 23 a rear movable clamp lower surface, 24 a rear movable clamp mounting shaft hole, 25 a rear movable clamp upper surface, 3 a front movable upper clamp, 31 a front movable upper clamp vertical pipe stress surface, 32 a front movable upper clamp lower surface, 33 a front movable upper clamp wedge stress surface, the front movable upper clamp mounting shaft hole, the front movable upper clamp upper surface, the front movable lower clamp vertical pipe stress surface, the front movable lower clamp upper surface, the front movable lower clamp left wedge stress surface, the front movable lower clamp right wedge stress surface, the front movable upper clamp locking mechanism mounting hole, the front movable lower clamp wedge support surface, the front movable lower clamp mounting shaft hole, the front movable lower clamp right locking mechanism, the front movable lower clamp locking handle, 511 handle locking threads, the handle push rod support surface, the handle handrail, the handle gasket support surface, the front movable lower clamp locking right push rod shaft shoulder, the front movable lower clamp locking right sleeve welding end, the front movable lower clamp locking right sleeve screw thread end and the front movable lower clamp locking right sleeve screw thread end, the device comprises a 54 front movable lower clamp locking wedge block, a 541 front movable lower clamp locking wedge block wedge surface, a 55 front movable lower clamp locking handle limit nut, a 56 front movable lower clamp unlocking ROV operating handle, a 57 gasket, a 6 front movable lower clamp left locking mechanism, a 62 front movable lower clamp locking left push rod, a 63 front movable lower clamp locking left sleeve, a 631 front movable lower clamp locking left sleeve welding end, a 632 front movable lower clamp locking left sleeve threaded end, a 7 rear movable clamp locking mechanism, a 71 upper movable clamp locking handle, a 72 rear movable clamp locking push rod, a 73 rear movable clamp locking sleeve, a 731 rear movable clamp locking sleeve welding end, a 732 rear movable clamp locking sleeve threaded end, a 74 upper movable clamp locking wedge block, a 741 upper movable clamp locking wedge surface, a 75 upper movable clamp locking handle limit nut, a 8 front movable upper clamp locking mechanism, a 82 front movable upper clamp locking push rod, a 83 front movable upper clamp locking sleeve, a 831 front movable upper clamp locking sleeve welding end, a 832 front movable upper clamp locking sleeve threaded end, a 9 front movable clamp pin, a 10 rear movable clamp pin. 120 risers. 121 riser stress ring.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
As shown in fig. 1 to 5, the invention provides a clamping mechanism capable of connecting a tension leg platform riser buoyancy device with a riser, so that the riser buoyancy device can be quickly and effectively connected with the riser, and the disassembly operation can be completed under water through an ROV during the disassembly. The clamping mechanism comprises a clamp frame 1, a rear movable clamp 2, a front movable upper clamp 3, a front movable lower clamp 4, a front movable lower clamp right locking mechanism 5, a front movable lower clamp left locking mechanism 6, a rear movable clamp locking mechanism 7 and a front movable upper clamp locking mechanism.
The clamping mechanism inserts the U-shaped load guide rail 11 on the clamp frame into the U-shaped load guide rail receiving groove of the vertical pipe buoyancy device to be connected, the clamping mechanism fixing plate 12 is fixed with the vertical pipe buoyancy device by utilizing bolts, the clamping mechanism clamps the vertical pipe stress ring 121 through the clamp frame vertical pipe stress surface 14, the rear movable clamp vertical pipe stress surface 21, the front movable upper clamp vertical pipe stress surface 31 and the front movable lower clamp vertical pipe stress surface 41, the connection of the clamping mechanism and the vertical pipe is completed, the front movable lower clamp locking wedge block 54 on the front movable lower clamp right locking mechanism 5 and the front movable lower clamp locking wedge block 54 on the front movable lower clamp right locking mechanism 6 are used for locking the front movable lower clamp 4, the rear movable clamp 2 is locked by the upper movable clamp locking wedge block 74 on the rear movable clamp locking mechanism 7, the front movable upper clamp 3 is locked by the upper movable clamp locking wedge block 74 on the front movable upper clamp locking mechanism 8, and the connection of the clamping mechanism and the vertical pipe is stable and reliable.
The rear movable clamp 2 is provided with a rear movable clamp mounting shaft hole 24, and is mounted on the rear movable clamp mounting shaft hole 19 of the clamp frame 1 through a rear movable clamp pin shaft 10, and the rear movable upper clamp 2 can rotate around the rear movable clamp pin shaft 10 and can only move slightly along the axial direction.
The front movable upper clamp 3 is provided with a front movable upper clamp mounting shaft hole 34 which is mounted on the front movable clamp mounting shaft hole 15 of the clamp frame 1 through a front movable clamp pin shaft 9, wherein the front movable upper clamp 3 can rotate around the front movable clamp pin shaft 9 and can only move slightly along the axial direction.
The front movable lower clamp 4 is provided with a front movable lower clamp mounting shaft hole 47, the front movable lower clamp is mounted on the front movable clamp mounting shaft hole 15 of the clamp frame 1 through a front movable clamp pin shaft 9, the front movable lower clamp 4 can rotate around the front movable clamp pin shaft 9, the front movable lower clamp 4 and the front movable upper clamp 3 share the front movable clamp mounting pin shaft 9, and the front movable lower clamp 4 is arranged below the front movable upper clamp 3.
The front movable lower clamp right locking mechanism 5 comprises a front movable lower clamp locking handle 51, a front movable lower clamp locking right push rod 52, a front movable lower clamp locking right sleeve 53, a front movable lower clamp locking wedge block 54, a front movable lower clamp locking handle limit nut 55 and a front movable lower clamp unlocking ROV operating handle 56, wherein one end of the front movable lower clamp locking right sleeve 53, which is close to the front movable lower clamp locking wedge block 54, is a sleeve welding end 531, and the other end is a front movable lower clamp locking right sleeve threaded end 532.
One end of the front movable lower clamp locking right push rod 52 is connected with the front movable lower clamp locking wedge block 54 in a threaded connection or welding mode, the other end of the front movable lower clamp locking right push rod 52 is a stepped shaft, the stepped shaft is connected with the front movable lower clamp locking handle 51, the front movable lower clamp locking handle 51 can freely rotate around the front movable lower clamp locking right push rod 52 but can only axially move a certain distance, the tail end of the stepped shaft of the front movable lower clamp locking right push rod 52 is fixedly connected with the front movable lower clamp unlocking ROV operating handle 56, the front movable lower clamp locking right push rod 52 freely moves axially in the front movable lower clamp locking right sleeve 53, and when the front movable lower clamp locking handle 51 is close to the front movable lower clamp locking right sleeve 53, the handle locking threads 511 can be screwed into the front movable lower clamp locking right sleeve threaded end 532.
The left locking mechanism 6 of the front movable lower clamp is identical to the right locking mechanism 5 of the front movable lower clamp in structure, but is slightly different in the dimensions of the sleeve and the push rod.
The rear movable clamp locking mechanism 7 has the same structural form as the front movable lower clamp right locking mechanism 5, except that the rear movable clamp locking mechanism 7 removes an ROV operating handle compared with the front movable lower clamp right locking mechanism 5, and the shape of a clamp locking wedge block is changed.
The front movable upper clamp locking mechanism 8 has the same structure as the rear movable clamp locking mechanism 7, but is slightly different in the dimensions of the sleeve and the push rod.
The front movable lower clamp locking right sleeve welding end 531 of the front movable lower clamp locking right sleeve 53 is welded to the front movable lower clamp right locking mechanism mounting hole 16, the front movable lower clamp locking right push rod 52 passes through the front movable lower clamp right locking mechanism mounting hole 16 to freely move inside thereof, the front movable lower clamp locking wedge 54 slides in the front movable lower clamp locking wedge chute 13, and the front movable lower clamp locking handle 51 is outside the clamp frame 1.
The front movable lower clamp locking left sleeve welding end 631 of the front movable lower clamp locking left sleeve 63 is welded to the front movable lower clamp left locking mechanism mounting hole 111, the front movable lower clamp locking right push rod 52 freely moves inside the front movable lower clamp right locking mechanism mounting hole 16 through the front movable lower clamp right locking mechanism mounting hole, the front movable lower clamp locking wedge 54 in the front movable lower clamp left locking mechanism 6 slides in the front movable lower clamp locking wedge chute 13, and the front movable lower clamp locking handle 51 is outside the clamp frame 1.
The rear movable clamp locking sleeve welding end 731 on the rear movable clamp locking sleeve 73 is welded to the rear movable clamp locking mechanism mounting hole 110, the rear movable clamp locking push rod 72 freely moves inside thereof through the rear movable clamp locking mechanism mounting hole 110, the upper movable clamp locking wedge 74 moves on the clamp frame rear lower support surface 112, and the upper movable clamp locking handle 71 is outside the clamp frame 1.
The front movable upper clamp locking sleeve welding end 831 on the front movable upper clamp locking sleeve 831 is welded to the front movable upper clamp locking mechanism mounting hole 45, the front movable upper clamp locking push rod 82 freely moves inside thereof through the front movable upper clamp locking mechanism mounting hole 45, the upper movable clamp locking wedge 74 on the front movable upper clamp locking mechanism 8 moves on the front movable lower clamp upper surface 42, and the upper movable clamp locking handle 71 is outside the clamp frame 1.
The clamping mechanism is connected to a riser buoyancy device through a U-shaped load guide rail 11 on a clamp frame, a clamping mechanism fixing plate 12 is fixed with the riser buoyancy device through bolts, and the clamping mechanism clamps a riser stress ring 121 through a clamp frame riser stress surface 14, a rear movable clamp riser stress surface 21, a front movable upper clamp riser stress surface 31 and a front movable lower clamp riser stress surface 41, so that the riser is connected with the clamping mechanism.
The clamp holding mechanism is connected with the vertical pipe 120, then the front movable lower clamp 4 is locked by the front movable lower clamp locking wedge block 54 on the front movable lower clamp right locking mechanism 5 and the front movable lower clamp left locking mechanism 6, the rear movable clamp 2 is locked by the upper movable clamp locking wedge block 74 on the rear movable clamp locking mechanism, and the front movable upper clamp 3 is locked by the upper movable clamp locking wedge block 74 on the front movable upper clamp locking mechanism 8.
Specifically, the connection of the clasping mechanism and the vertical pipe is accomplished by:
1. the clamp holding mechanism is opened, as shown in fig. 3, at this time, the front movable upper clamp 3, the front movable lower clamp 4 and the rear movable clamp 2 are movable and can rotate arbitrarily, the vertical pipe 120 enters the clamp frame 1 of the clamp holding mechanism from the front of the clamp holding mechanism, so that the vertical pipe 120 smoothly enters the clamp frame 1 from the front of the clamp holding mechanism, the front movable lower clamp 4 and the front movable upper clamp 3 should be rotated to the positions shown in fig. 3, and the rear movable clamp 2 should also be rotated to the positions where the vertical pipe stress ring 121 cannot be touched.
2. The vertical pipe 120 enters the clamp frame 1 of the clamping mechanism, the vertical pipe stress ring 121 is located above the clamp frame vertical pipe stress surface 14 by a certain distance, the front movable lower clamp 4 is rotated to clamp the vertical pipe 120, the front movable lower clamp locking handle 51 in the front movable lower clamp right locking mechanism 5 is pushed, the handle locking thread 511 is screwed into the front movable lower clamp locking right sleeve threaded end 532, at the moment, the front movable lower clamp locking handle 51 pushes the front movable lower clamp locking right push rod 52 to move forwards, the front movable lower clamp locking wedge block 54 moves a certain distance, the front movable lower clamp locking wedge block 541 starts to press the front movable lower clamp right wedge block stress surface 44, the front movable lower clamp left locking mechanism 6 is operated in the same way, the front movable lower clamp locking wedge block 541 in the front movable lower clamp left wedge block stress surface 43 is pressed by the front movable lower clamp, the clamp frame vertical pipe stress surface 14 and the front movable upper clamp vertical pipe stress surface 31 are conical surfaces, and at the moment, the clamp frame vertical pipe stress surface 14 and the front movable upper clamp vertical pipe stress surface 31 are on one conical surface, and the front movable lower clamp 4 is locked. The front movable lower clamp locking handle 51 is unscrewed from the front movable lower clamp locking right sleeve 53 and the front movable lower clamp locking left sleeve 63 after the front movable lower clamp 4 is locked, and when the front movable lower clamp locking handle 51 is unscrewed, the front movable lower clamp locking handle 51 and the front movable lower clamp locking handle limiting nut 55 do not contact with each other, so that the front movable lower clamp can not move along with the front movable lower clamp locking right push rod 52, and the front movable lower clamp completes the locking of the clamp through the self-locking property of the front movable lower clamp locking wedge block 54, and the clamping mechanism is shown in fig. 2 at the moment.
3. The vertical pipe is lowered, the vertical pipe stress ring 121 falls on the vertical pipe stress surface 14 of the clamp frame and the vertical pipe stress surface 31 of the front movable upper clamp, the upper surface and the lower surface of the vertical pipe stress ring 121 are conical surfaces, at the moment, the vertical pipe stress surface 14 of the clamp frame and the vertical pipe stress surface 31 of the front movable upper clamp support the lower surface of the vertical pipe stress ring 121 together, the upper movable clamp locking handle 71 on the rear movable clamp locking mechanism 7 is pushed, the upper movable clamp locking handle 71 is screwed into the threaded end 732 of the rear movable clamp locking sleeve, the upper movable clamp locking handle 71 pushes the rear movable clamp locking push rod 72 and the upper movable clamp locking wedge block 74 to move forwards together, the upper movable clamp locking wedge block wedge surface 741 on the upper movable clamp locking wedge block 74 presses the rear movable clamp wedge block 22 to enable the rear movable clamp 2 to rotate towards the vertical pipe, thereby limiting the upward movement of the vertical pipe, the upper movable clamp vertical pipe stress surface 21 on the vertical pipe, the upper movable clamp locking mechanism 71 on the front movable clamp locking mechanism 8 is pushed to enable the upper clamp riser surface 41 to be tightly attached to the vertical pipe stress surface 121, at the moment, the front movable clamp locking mechanism 7 is required to be tightly attached to the upper clamp surface of the vertical pipe stress ring 21, and the lower movable clamp mechanism 7 is required to be tightly fastened, and the vertical pipe stress surface is prevented from being tightly held down by the movable clamp mechanism 7 when the vertical pipe is tightly attached to the vertical pipe stress mechanism is required to the upper clamp mechanism is fastened, and the vertical pipe is fastened to the vertical pipe is fastened, and the vertical pipe is fastened by the vertical pipe is fastened, and the vertical pipe is fastened under the force is required to be tightly, and the force is fastened.
Specifically, the operation of the locking handle is achieved by the following principle:
referring to fig. 18, the locked state of the front movable lower clamp right locking mechanism 5 can be seen. The handle push rod supporting surface 512 on the front movable lower clamp locking handle 51 is pushed against the front movable lower clamp locking right push rod shaft shoulder 521 to move forward in the locking process, and when the handle locking thread 511 is screwed into the front movable lower clamp locking right sleeve threaded end 532, the pushing force can be increased by screw transmission, so that the movable clamp is locked more tightly. After the front movable lower clamp locking handle 51 is screwed out after the locking, the front movable lower clamp locking right push rod 52 cannot withdraw, the front movable lower clamp locking handle 51 can move freely on the front movable lower clamp locking right push rod 52 after being completely screwed out, but the front movable lower clamp locking handle 51 moves outwards for a certain distance, and then the handle gasket supporting surface 514 can prop against the gasket 57 and cannot be separated from the front movable lower clamp locking right push rod 52.
Specifically, the rear movable clamp 2 and the front movable upper clamp 3 are locked by the following principles:
referring to fig. 5 and 7, before the upper movable clamp locking wedge 74 locks the rear movable clamp 2 with the front movable upper clamp 3, the rear movable clamp lower surface 23 is in contact with the clamp frame rear lower support surface 112, the front movable upper clamp lower surface 32 is in contact with the front movable lower clamp upper surface 42, a gap is provided between the rear movable clamp upper surface 25 and the front movable upper clamp upper surface 35 and the clamp frame upper support surface 18, when the upper movable clamp locking wedge 741 presses the rear movable clamp wedge force-bearing surface 22 and the front movable upper clamp wedge force-bearing surface 33, the rear movable clamp 2 and the front movable upper clamp 3 rotate toward the vertical pipe, the rear movable clamp wedge force-bearing surface 22 and the front movable upper clamp wedge force-bearing surface 33 are wedge surfaces, when the rear movable clamp vertical pipe force-bearing surface 21 is in contact with the upper surface of the vertical pipe force-bearing ring 121, the rear movable clamp 2 is moved upward to make the rear movable clamp upper surface 25 in contact with the clamp frame upper support surface 18 under the joint pressing of the inclined surface of the rear movable clamp wedge force-bearing surface 22 and the inclined surface of the front movable clamp force-bearing ring 121, and thus the upper movable clamp wedge 2 cannot be pressed by the upper movable clamp wedge-bearing surface 741 and the vertical pipe force-bearing surface 3 when the upper movable clamp wedge-bearing surface 741 presses the front movable clamp wedge-bearing surface 2 and the vertical pipe-bearing surface 741.
Claims (1)
1. The utility model provides a deep water riser buoyancy device embraces and presss from both sides mechanism which characterized in that: the clamp comprises a clamp frame with a U-shaped section, a rear movable clamp, a front movable upper clamp, a front movable lower clamp right locking mechanism, a front movable lower clamp left locking mechanism, a rear movable clamp locking mechanism and a front movable upper clamp locking mechanism, wherein a U-shaped load guide rail is arranged at the upper end of the clamp frame, a pair of clamp holding mechanism fixing plates are arranged at the front end of the clamp frame, a clamp frame vertical pipe stress surface which is in contact with a vertical pipe is arranged on the inner surface of the clamp frame, a pair of front movable lower clamp locking wedge sliding grooves are symmetrically arranged on the front end surface of the clamp frame, and a front movable lower clamp right locking mechanism mounting hole and a front movable lower clamp left locking mechanism mounting hole are arranged on two sides of the front end of the clamp frame; the front movable lower clamp and the front movable upper clamp share a front movable clamp mounting pin shaft and are mounted in a front movable clamp mounting pin shaft arranged on the clamp frame through the front movable clamp mounting pin shaft, the front movable lower clamp is positioned below the front movable upper clamp, and the inner surface of the front movable upper clamp and the inner surface of the front movable lower clamp are respectively a front movable upper clamp vertical pipe stress surface and a front movable lower clamp vertical pipe stress surface which are in contact with the vertical pipe; the front movable lower clamp right locking mechanism, the front movable lower clamp left locking mechanism, the rear movable lower clamp locking mechanism and the front movable upper clamp locking mechanism all comprise locking sleeves, push rods arranged in the locking sleeves, locking wedge blocks arranged at one ends of the push rods and locking handles arranged at the other ends of the push rods, one ends of the locking sleeves are threaded ends, the other ends of the locking sleeves are connecting ends, the push rods are in a ladder shape, push rod supporting surfaces matched with the ladder surfaces of the push rods are arranged in the locking handles, locking threads matched with the threaded ends are arranged in the locking handles, the ends of the locking handles of the front movable lower clamp right locking mechanism and the front movable lower clamp left locking mechanism are respectively provided with a front movable lower clamp unlocking ROV operating handle, the connecting ends of the locking sleeves of the front movable lower clamp right locking mechanism are welded in right locking mechanism mounting holes of the front movable lower clamp, the locking wedge block of the right locking mechanism of the front movable lower clamp slides in a locking wedge block chute of the front movable lower clamp, the connecting end of the locking sleeve of the left locking mechanism of the front movable lower clamp is welded in a left locking mechanism mounting hole of the front movable lower clamp, the locking wedge block of the left locking mechanism of the front movable lower clamp slides in a locking wedge block chute of the other front movable lower clamp, the connecting end of the locking sleeve of the rear movable clamp is welded in a locking mechanism mounting hole of the rear movable clamp, the locking wedge block of the rear movable clamp moves on a rear lower supporting surface of the clamp frame, the locking mechanism mounting hole of the rear movable clamp is arranged at the rear end of the clamp frame, the connecting end of the locking sleeve of the locking mechanism of the front movable upper clamp is welded in a locking mechanism mounting hole of the front movable upper clamp, the locking mechanism mounting hole of the front movable upper clamp is arranged on the front movable lower clamp, the locking wedge of the front movable upper clamp locking mechanism moves on the upper surface of the front movable lower clamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710301446.1A CN107010179B (en) | 2017-05-02 | 2017-05-02 | Clamping mechanism of buoyancy device of deepwater vertical pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710301446.1A CN107010179B (en) | 2017-05-02 | 2017-05-02 | Clamping mechanism of buoyancy device of deepwater vertical pipe |
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| CN107010179A CN107010179A (en) | 2017-08-04 |
| CN107010179B true CN107010179B (en) | 2023-06-09 |
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| CN201710301446.1A Active CN107010179B (en) | 2017-05-02 | 2017-05-02 | Clamping mechanism of buoyancy device of deepwater vertical pipe |
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| CN115180064B (en) * | 2022-07-29 | 2023-06-16 | 广船国际有限公司 | Pile fixing guide structure and ship |
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| DE102004020637B3 (en) * | 2004-04-27 | 2005-11-10 | Tilman Heinrich | Connecting system for three-dimensional tubular structures uses threaded tension lock with tie rod and ball head bearing engaging in axially aligned elongated holes in tubular upright |
| GB0913215D0 (en) * | 2009-07-30 | 2009-09-02 | Tubefuse Applic V O F | Gripping apparatus |
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| CN104500881B (en) * | 2014-11-27 | 2016-11-30 | 中国海洋石油总公司 | Clamping hoop type clamping device |
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2017
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