Adjustable lifting and clamping device for offshore oil pipe

Abstract

The invention relates to an adjustable lifting and clamping device for an offshore oil pipe. The adjustable lifting and clamping device comprises two adjustable lifting and clamping units which are oppositely arranged. Each adjustable lifting and clamping unit comprises a lifting device, a rotary holding and clamping device and an auxiliary supporting device; the rotary clamping device comprises a first support, a second support, a first semi-ring block, a second semi-ring block, a first semi-gear ring, a second semi-gear ring, a plurality of clamps and a driving mechanism. The first support and the second support are slidably arranged on the top of the lifting device in the X direction. The change of the pitch angle of the oil pipe is controlled through the height difference of the two lifting devices, and the two lifting devices can horizontally move to adjust the distance so as to adapt to oil pipes of different specifications and sizes; and through the arrangement of the rotary clamping device, the oil pipe can be fixed, and the rotation angle can be controlled at the same time, so that the oil pipe can be flexibly adjusted in all directions, and the efficiency of butt joint, maintenance and debugging of the oil pipe is improved.

Description

Technical Field

[0001] The invention relates to the technical field of lifting and clamping, and in particular to an adjustable lifting and clamping device for offshore oil pipes. Background Art

[0002] Offshore oil and gas production is an important part of the modern energy industry, especially in the development of deep-sea and ultra-deep-sea oil and gas fields, which faces many complex technical challenges. In offshore oil and gas platforms, oil pipes are important transportation media, and they need to be docked, repaired, debugged, and other operations. Before the oil pipe is laid underwater, it needs to be inspected in real time. During the inspection operation, installation, lifting, and clamping steps are required. The above steps usually need to be completed under dynamic and complex sea conditions, and the volume and weight of the oil pipe are large. In the prior art, many oil pipe lifting devices rely on traditional clamping structures, which are composed of two fixed support clamps. The oil pipe is hoisted and placed on two support clamps and fixed by the clamping mechanism on the support clamps. Although the support clamp can effectively support and fix the oil pipe, it cannot adjust the posture of the oil pipe. If the oil pipe needs to be rotated, the existing method needs to first loosen the support clamp, and then lift the oil pipe again. In this state, the oil pipe is rotated to the required angle, and then placed on the support clamp for clamping and fixing again. It lacks flexible adjustment capabilities, reduces the efficiency of oil pipeline docking, maintenance and debugging, and has certain risks. Summary of the invention

[0003] Based on this, it is necessary to provide an adjustable lifting clamping device for offshore oil pipes to address the problem that the existing clamping devices lack flexible adjustment capabilities, resulting in reduced efficiency in oil pipe docking, maintenance and commissioning.

[0004] The present invention provides an offshore oil pipe adjustable lifting and clamping device, which comprises two adjustable lifting and clamping units arranged opposite to each other; each adjustable lifting and clamping unit comprises:

[0005] A lifting device, which is used to adjust the height to form a height difference between the two lifting devices, and the inclination angle of the two ends of the oil pipe is controlled by the height difference;

[0006] A rotating clamping device, which is arranged on the top of the lifting device and is used to fix the oil pipe and drive the oil pipe to rotate; and

[0007] An auxiliary support device, which is arranged on the top of the lifting device and is used to support the oil pipe before fixing the oil pipe;

[0008] Wherein, the rotating clamping device comprises:

[0009] A first bracket and a second bracket are slidably arranged on the top of the lifting device along the X direction;

[0010] A first half ring block, which is rotatably connected to the first bracket along the X direction;

[0011] A second half ring block is rotatably connected to the second bracket along the X direction, and the second half ring block and the first half ring block can be moved along the X direction to form a fixed ring;

[0012] The first half gear ring and the second half gear ring can be assembled into a rotating gear ring by moving along the X direction; the rotating gear ring is coaxially arranged with the fixed ring; the rotating gear ring and the fixed ring rotate relative to each other through an annular slide rail mechanism;

[0013] A plurality of clamps are arranged on the rotating gear ring; the plurality of clamps are used to clamp and fix the oil pipe located in the rotating gear ring; and

[0014] The driving mechanism is used to drive the rotating gear ring to rotate on the fixed ring.

[0015] As a preferred example, both lifting devices are scissor-type lifting mechanisms;

[0016] Both lifting devices move along the Y direction.

[0017] As a preferred example, the auxiliary supporting device includes:

[0018] Two support seats are slidably arranged on the top of the lifting device along the X direction;

[0019] Two rollers are respectively arranged on two supporting seats; when the two rollers are close to each other, they are used to support the oil pipe.

[0020] As a preferred example, a servo motor 1 is provided on the first bracket and the second bracket, wherein one servo motor 1 is used to drive the first half ring block to rotate along the X direction on the first bracket, and the other servo motor 1 is used to drive the second half ring block to rotate along the X direction on the second bracket.

[0021] As a preferred example, a locking mechanism is provided on the first half ring block, which is used to lock and fix the first half ring block and the second half ring block when they are assembled to prevent them from being separated by force.

[0022] As a preferred embodiment, the end surface of the fixed ring is provided with an annular slide track; the annular slide track mechanism includes:

[0023] A plurality of pulleys are rollingly arranged in the slideway track;

[0024] A plurality of connecting shafts corresponding to the pulleys one by one, one end of which is connected to the pulley and the other end of which is connected to the rotating gear ring.

[0025] As a preferred example, the driving mechanism includes:

[0026] A second servo motor connected to the first half ring block;

[0027] The transmission gear is meshed with the output shaft of the servo motor 2 and the rotary gear ring.

[0028] As a preferred example, a brake is provided on the second half ring block, which is used to fix the first half gear ring or the second half gear ring on the separated second half ring block.

[0029] As a preferred embodiment, two clamps are provided on the first half gear ring and the second half gear ring, and the four clamps on the rotary gear ring are distributed at equal angles;

[0030] The fixture includes:

[0031] A fixed plate connected to the rotating gear ring;

[0032] A power mechanism, which is connected to the fixed plate and has a linear motion at the output end;

[0033] The shoe clamp is connected to the output end of the power mechanism to perform linear motion along the diameter direction of the rotating gear ring.

[0034] As a preferred example, the clamp further includes a photoelectric sensor connected to the fixed plate for detecting position changes of the shoe jaws.

[0035] The beneficial effects of the present invention are:

[0036] 1. The present invention controls the pitch angle change of the oil pipe through the height difference of the two lifting devices, and the two lifting devices can be translated to adjust the spacing to adapt to oil pipes of different specifications and sizes; the setting of the rotating clamping device can also realize the fixing and rotation angle control of the oil pipe at the same time, so that the oil pipe can be flexibly adjusted in all directions, thereby improving the efficiency of oil pipe docking, maintenance and debugging.

[0037] 2. The rotary clamping device of the present invention is designed with two half-ring blocks for assembly and separation, so that it can not only clamp the oil pipe, but also drive the oil pipe to rotate, thereby facilitating the adjustment of the angle of the oil pipe, and the oil pipe is still fixed during adjustment, thereby improving safety during work. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0039] Figure 1 It is a structural schematic diagram of an adjustable lifting and clamping device for offshore oil pipes;

[0040] Figure 2 It is a structural schematic diagram of a rotary clamping device;

[0041] Figure 3 is a schematic diagram of the structure of the first half ring block;

[0042] Figure 4 It is a schematic diagram of the structure in which the pulley and the connecting shaft are installed on the first half ring block;

[0043] Figure 5 is a schematic diagram of the structure of the fixture;

[0044] Figure 6 is a structural schematic diagram of the driving mechanism;

[0045] Figure 7 It is a schematic diagram of the structure of one of the support seats in the auxiliary support device;

[0046] Figure 8 A schematic diagram of the brake structure.

[0047] In the figure: base 1, lifting device 2;

[0048] Rotating clamping device 3, first bracket 31, second bracket 32, first half ring block 33, second half ring block 34, fixture 35, fixing plate 351, power mechanism 352, shoe clamp 353, photoelectric sensor 354, driving mechanism 36, servo motor 1 37, second half gear ring 38, first half gear ring 39;

[0049] Auxiliary support device 4, support seat 41, roller 42;

[0050] Locking mechanism 5, pulley 6, connecting shaft 7, slide track 8, shield 9;

[0051] Brake 10 , electromagnetic brake 101 , and driven gear 102 . DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0054] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0056] Please refer to Figure 1 The present embodiment provides an offshore oil pipe adjustable lifting and clamping device, which includes a base 1 and two adjustable lifting and clamping units arranged opposite to each other. If the length direction of the base 1 is the Y direction, the two adjustable lifting and clamping units are arranged opposite to each other on the base 1 along the Y direction and can move along the Y direction on the base 1, that is, the distance between the two adjustable lifting and clamping units is adjustable.

[0057] Specifically, taking an adjustable lifting and clamping unit as an example, the adjustable lifting and clamping unit includes a lifting device 2, a rotating clamping device 3, an auxiliary support device 4 and a brake 10. The lifting device 2 can adopt a scissor-type lift, which adjusts the height by hydraulically controlling the angle of the connecting rod. The lifting device 2 is moved along the Y direction by a translation mechanism at the bottom of the lifting device 2. The two ends of the oil pipe are respectively fixed by two adjustable lifting and clamping units. Therefore, by controlling the lifting height of the two lifting devices 2 to form a height difference, the inclination angle of the two ends of the oil pipe can be controlled. The inclination angle is the angle between the length direction of the oil pipe and the horizontal plane, which is commonly referred to as the pitch angle.

[0058] The following is an introduction to the rotary clamping device 3:

[0059] Please refer to Figure 2The rotating clamping device 3 is used to fix the oil pipe and drive the oil pipe to rotate. It includes a first bracket 31, a second bracket 32, a first half ring block 33, a second half ring block 34, a first half gear ring 39, a second half gear ring 38, a plurality of clamps 35 and a driving mechanism 36. The direction perpendicular to the Y direction on the horizontal plane is the X direction. The first bracket 31 and the second bracket 32 ​​are moved in the X direction through a translation mechanism at the top of the lifting device 2, that is, the spacing between the first bracket 31 and the second bracket 32 ​​is adjusted by movement. A servo motor 37 is fixed on the first bracket 31 and the second bracket 32. The output shafts of the two servo motors 37 are both arranged along the X direction, and the two output shafts are arranged facing each other. The outer side wall of the first half ring block 33 (the outer side wall is a side of the arc-shaped first half ring block 33 protruding outward) is connected to the output shaft of one of the servo motors 37. The outer side wall of the second half ring block 34 is connected to the output shaft of the other servo motor 37. The servo motor 37 plays several roles: first, it can control the rotation of the first half ring block 33 and the second half ring block 34, so that the first half ring block 33 and the second half ring block 34 are at the same angle when they are assembled. Second, based on the characteristics of the servo motor 37 itself, the rotation angle of the first half ring block 33 and the second half ring block 34 can be measured, so that the pitch angle of the oil pipe can be known. Third, the servo motor 37 with a brake function can brake the shaft, thereby preventing the first half ring block 33 and the second half ring block 34 from rotating arbitrarily under the influence of external forces. It should be noted that the first half ring block 33 and the second half ring block 34 can be assembled into a fixed ring after moving in the X direction, so that the fixed ring can rotate between the first bracket 31 and the second bracket 32 ​​along its symmetry line in the X direction. The first half gear ring 39 and the second half gear ring 38 can also be assembled into a complete, annular rotating gear ring when moving in the X direction. The formed rotating gear ring is coaxially arranged with the fixed ring, and the rotating gear ring and the fixed ring are relatively rotated through an annular slide rail mechanism. Specifically, Figure 3 and Figure 4 As shown, the end faces of the first half ring block 33 and the second half ring block 34 (the end face is a face perpendicular to the axis of the fixed ring) are both provided with a slide groove track 8. When the first half ring block 33 and the second half ring block 34 are assembled, the slide groove tracks 8 on both sides can form a complete, annular slide groove track 8. The annular slide rail mechanism includes a plurality of pulleys 6 and a plurality of connecting shafts 7 corresponding to the plurality of pulleys 6. The plurality of pulleys 6 are all rollingly arranged in the slide groove track 8. One end of the connecting shaft 7 is connected to the pulley 6, and the other end is connected to the rotating gear ring, so that the entire rotating gear ring can be connected to the fixed ring and can rotate coaxially. This connection design can effectively reduce the friction between the fixed ring and the rotating gear ring, and is easy to disassemble and assemble. In addition, a slide groove track 8 can also be provided on the end face of the rotating gear ring, and one end of the connecting shaft 7 is connected to the rotating gear ring, which can also achieve the above-mentioned effect.

[0060] It should also be noted that when the first half ring block 33 and the second half ring block 34 are separated, it is necessary to first control the first half gear ring 39 to correspond to the angle of the first half ring block 33, and the second half gear ring 38 to correspond to the angle of the second half ring block 34, that is, the dividing line on the fixed ring and the dividing line on the rotating gear ring coincide, to prevent the first half gear ring 39 from crossing over the first half ring block 33 and the second half ring block 34, causing interference with the separation of the fixed ring. Similarly, when the first half ring block 33 and the second half ring block 34 are assembled, it is also necessary to correspond their angles and the positions of the first half gear ring 39 and the second half gear ring 38.

[0061] For the fixture 35, if Figure 5 As shown, in this embodiment, two clamps 35 are provided on the first half gear ring 39 and the second half gear ring 38, and a total of four clamps 35 on the rotating gear ring are distributed at equal angles. The clamp 35 includes: a fixed plate 351, a power mechanism 352, a shoe clamp 353 and a photoelectric sensor 354. The fixed plate 351 is fixed on the rotating gear ring. The power mechanism 352 is connected to the fixed plate 351. The power mechanism 352 in this embodiment includes a stepping motor, a transmission belt, a screw rod, a screw hole plate, a light rod, a limit plate and a spring. The limit plate is fixed on the fixed plate 351. The light rod passes through the limit plate and is slidably connected to the limit plate. One end of the light rod is fixed to the shoe clamp 353, and the other end is fixed to the screw hole plate. One end of the screw rod is rotatably connected to the fixed plate 351, and the other end is threadedly sleeved with the screw hole plate. The stepper motor is fixed on the fixed plate 351 and arranged parallel to the length direction of the screw rod. The output shaft of the stepper motor is connected to the screw rod by a transmission belt, so that the layout space can be reduced while meeting the transmission requirements. The rotation of the screw rod driven by the stepper motor can make the light rod move linearly, thereby driving the expansion and contraction of the shoe clamp 353. The spring is sleeved on the light rod, and its two ends are distributed and abutted on the limit plate and the screw hole plate, which plays a certain buffering role to prevent severe impact and sudden force changes. The shoe clamp 353 is driven by the light rod to move linearly, and its linear movement direction is along the diameter direction of the rotating gear ring, so that the four shoe clamps 353 can stably clamp and fix the oil pipe. The selection of the shoe clamp 353 is conducive to increasing the contact area with the oil pipe. A rubber layer is installed on the shoe clamp 353 to reduce hard collision when clamping the oil pipe and play a protective role. The photoelectric sensor 354 is also fixed on the fixed plate 351. By detecting the change in the distance between the shoe clamp 353 and the photoelectric sensor 354, the position change of the shoe clamp 353 is detected, so that the operator can control and adjust the oil pipe clamping in time.

[0062] As for the driving mechanism 36, it is used to rotate the rotating gear ring on the fixed ring to drive the angle change of the oil pipe. Figure 6As shown, the driving mechanism 36 includes a servo motor 2 and a transmission gear. The servo motor 2 is fixed on the first half ring block 33, and the output shaft of the servo motor 2 is meshed with the transmission gear, and the transmission gear is meshed with the rotating ring gear, so that the servo motor 2 can drive the rotating ring gear to rotate, and then drive the clamped and fixed oil pipe to rotate. The servo motor 2 used also has the function of measuring the rotation angle. Of course, the driving mechanism 36 is not limited to this, and it can drive the rotating ring gear to rotate.

[0063] The following is an introduction to the auxiliary support device 4:

[0064] The auxiliary support device 4 is also provided on the top of the lifting device 2, and is used to support the oil pipe before fixing the oil pipe. Figure 7 As shown, the auxiliary support device 4 includes two support seats 41 and two rollers 42. The two support seats 41 are also slidably arranged on the top of the lifting device 2 along the X direction through a translation mechanism, and are parallel to the fixed ring and not far apart. The roller 42 can be made of rubber. The two rollers 42 are respectively connected to the tops of the two support seats 41 through bearing seats. The two support seats 41 move to adjust the distance between them, and the oil pipe is placed on the two rollers 42 to adjust the height of the oil pipe. When the first half ring block 33 and the second half ring block 34 are not assembled into a fixed ring, the two support seats 41 move closer to the middle to support the oil pipe. When the first half ring block 33 and the second half ring block 34 are assembled into a fixed ring, and after the shoe clamp 35 clamps the oil pipe, the two support seats 41 spread out to both sides.

[0065] Regarding the brake 10, if the drive mechanism 36 is installed on the first half ring block 33, the brake 10 is installed on the second half ring block 34. When the first half ring block 33 and the second half ring block 34 are separated, the drive mechanism 36 can fix the first half gear ring 39 on the first half ring block 33 so that it will not slip off. The second half gear ring 38 on the second half ring block 34 needs to be fixed by the brake 10. In this embodiment, Figure 8 As shown, the brake 10 includes an electromagnetic brake 101 and a driven gear 102. The electromagnetic brake 101 is fixed on the second half ring block 34, and its output shaft is meshed with the second half gear ring 38 through the driven gear 102. When the rotating gear ring rotates, the electromagnetic brake 101 is powered on without braking, and the driven gear 102 rotates with the rotating gear ring. When the first half ring block 33 and the second half ring block 34 are separated, the electromagnetic brake 101 is powered off and braked, and the driven gear 102 will not rotate, thereby making the second half gear ring 38 stationary to prevent it from slipping.

[0066] Furthermore, a locking mechanism 5 is provided on the first half ring block 33, which is used to lock and fix the first half ring block 33 and the second half ring block 34 when they are assembled to prevent them from being separated by force. For example, a mortise and tenon structure is provided on the contact surface of the first half ring block 33 and the second half ring block 34. The locking mechanism 5 provided at the mortise and tenon joint can adopt a latch controlled by an electromagnet. When the first half ring block 33 and the second half ring block 34 are assembled, the electromagnet is powered off so that the latch pops out and is inserted into the lock hole at the mortise and tenon joint to prevent them from being separated by force. When the first half ring block 33 and the second half ring block 34 need to be separated, the electromagnet is powered on so that the latch retracts. In addition, a corresponding shield 9 can also be provided on the periphery of the first half ring block 33 and the second half ring block 34. The shield 9 consists of two semicircular parts, fixed on the first half ring block 33 and the second half ring block 34, and moves with them. The protective cover 9 wraps the gear ring inside, which plays a certain protective role, and a drag chain can be set inside the protective cover 9, and the cable in the drag chain is used to power the clamp 35 to avoid power failure due to cable entanglement or damage during rotation. In addition, a brake 10 can also be installed at the output shaft of the servo motor 37 to prevent the servo motor 37 from losing its braking effect due to its own braking force being too small, thereby further improving stability. For the above-mentioned translation mechanism, it can be selected according to needs, such as linear guides, hydraulic cylinders, motor-driven rack movement and other structural forms, and no excessive restrictions are made here.

[0067] The working principle of the present invention is as follows: when the oil pipe needs to be fixed, the first half ring block 33 and the second half ring block 34 are first in a separated state. The auxiliary support device 4 moves to a position between the first half ring block 33 and the second half ring block 34. Then the oil pipe is hoisted and placed on the auxiliary support device 4. After the oil pipe is stably placed on the auxiliary support device 4, the first half ring block 33 and the second half ring block 34 are assembled into a fixed ring, and the fixed ring sleeves the oil pipe therein. Then the clamp 35 is driven so that multiple clamps 35 clamp the oil pipe. At this time, the rotating gear ring rotates 360° or positive and negative 180° under the drive of the driving mechanism 36, and the driving mechanism 36 can detect the rotation angle of the rotating gear ring, thereby driving the oil pipe to rotate for angle adjustment. For the pitch angle adjustment of the oil pipe, it is controlled by the height of the two lifting devices 2. When the two lifting devices 2 are at the same height, the oil pipe is in a horizontal state. When there is a height difference between the two lifting devices 2, the oil pipe generates a pitch angle accordingly. When the oil pipe produces a pitching motion, the servo motor 1 37 measures the corresponding pitch angle change and transmits the signal to the corresponding host computer. When the oil pipe needs to be removed, the auxiliary support device 4 first supports the oil pipe, and then the clamp 35 is loosened, the first half ring block 33 and the second half ring block 34 are separated, and the oil pipe can be hoisted and removed.

[0068] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An adjustable lifting and clamping device for offshore oil pipes, characterized in that: It includes two adjustable lifting and clamping units arranged opposite to each other; each adjustable lifting and clamping unit includes: A lifting device (2) is used to adjust the height to form a height difference between the two lifting devices (2), and the inclination angles of the two ends of the oil pipe are controlled by the height difference; A rotating clamping device (3) is arranged on the top of the lifting device (2) and is used to fix the oil pipe and drive the oil pipe to rotate; and An auxiliary support device (4) is arranged on the top of the lifting device (2) and is used to support the oil pipe before fixing the oil pipe; Wherein, the rotating clamping device (3) comprises: A first bracket (31) and a second bracket (32) are slidably arranged on the top of the lifting device (2) along the X direction; A first half ring block (33) rotatably connected to the first bracket (31) along the X direction; A second half ring block (34) is rotatably connected to the second bracket (32) along the X direction, and the second half ring block (34) and the first half ring block (33) can be moved along the X direction to form a fixed ring; The first half gear ring (39) and the second half gear ring (38) can be assembled into a rotating gear ring by moving along the X direction; the rotating gear ring is coaxially arranged with the fixed ring; the rotating gear ring and the fixed ring are relatively rotated via an annular slide rail mechanism; A plurality of clamps (35) are arranged on the rotating gear ring; the plurality of clamps (35) are used to clamp and fix the oil pipe located in the rotating gear ring; and A driving mechanism (36) is used for driving the rotating gear ring to rotate on the fixed ring.

2. The adjustable lifting and clamping device for offshore oil pipes according to claim 1 is characterized in that: Both lifting devices (2) are scissor-type lifting mechanisms; Both lifting devices (2) move along the Y direction.

3. The adjustable lifting and clamping device for offshore oil pipes according to claim 1 is characterized in that: The auxiliary supporting device (4) comprises: Two support seats (41) are slidably arranged on the top of the lifting device (2) along the X direction; Two rollers (42) are respectively arranged on two supporting seats (41); when the two rollers (42) are close to each other, they are used to support the oil pipe.

4. The adjustable lifting and clamping device for offshore oil pipes according to claim 1 is characterized in that: A servo motor 1 (37) is provided on each of the first bracket (31) and the second bracket (32), wherein one servo motor 1 (37) is used to drive the first half ring block (33) to rotate along the X direction on the first bracket (31), and the other servo motor 1 (37) is used to drive the second half ring block (34) to rotate along the X direction on the second bracket (32).

5. The adjustable lifting and clamping device for offshore oil pipes according to claim 1 is characterized in that: The first half ring block (33) is provided with a locking mechanism (5) for locking and fixing the first half ring block (33) and the second half ring block (34) when they are assembled to prevent them from being separated due to force.

6. The adjustable lifting and clamping device for offshore oil pipes according to claim 1 is characterized in that: The end surface of the fixed ring is provided with an annular slide track (8); the annular slide track mechanism comprises: A plurality of pulleys (6) are rollingly arranged in the slideway track (8); A plurality of connecting shafts (7) corresponding one to one with the pulleys (6) have one end connected to the pulley (6) and the other end connected to the rotating gear ring.

7. The adjustable lifting and clamping device for offshore oil pipes according to claim 1 is characterized in that: The driving mechanism (36) comprises: A second servo motor connected to the first half ring block (33); The transmission gear is meshed with the output shaft of the servo motor 2 and the rotary gear ring.

8. The adjustable lifting and clamping device for offshore oil pipes according to claim 7 is characterized in that: The second half ring block (34) is provided with a brake (10) for fixing the first half gear ring (39) or the second half gear ring (38) on the separated second half ring block (34).

9. The adjustable lifting and clamping device for offshore oil pipes according to claim 1, characterized in that: Two clamps (35) are provided on the first half gear ring (39) and the second half gear ring (38), and the four clamps (35) on the rotating gear ring are distributed at equal angles; Wherein, the fixture (35) comprises: A fixed plate (351) connected to the rotating gear ring; A power mechanism (352) connected to the fixed plate (351), wherein the output end thereof moves in a linear motion; The shoe clamp (353) is connected to the output end of the power mechanism (352) to perform linear motion along the diameter direction of the rotating gear ring.

10. The adjustable lifting and clamping device for offshore oil pipes according to claim 9, characterized in that: The clamp (35) further comprises a photoelectric sensor (354) which is connected to the fixing plate (351) and is used to detect the position change of the shoe clamping claw (353).

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