阅读说明：本技术 一种适用于深海采矿的管船联接方法 (Pipe ship connection method suitable for deep sea mining ) 是由 李源 杨高胜 陈丹东 余倩 谢梦琪 杨树森 唐颖 于 2020-11-19 设计创作，主要内容包括：一种适用于深海采矿的管船联接方法,包括S1、安装支撑盘,下放调整短节、伸缩装置,并将伸缩装置与最后一根硬管连接,提起调整短节与伸缩装置组成的管串；S2、在支撑盘内安装补芯单元；S3、下放球型接头后与调整短节连接,并拆除补芯单元；S4、下放球型接头、调整短节、伸缩装置管串至伸缩装置上的张紧环与张紧器上的钢丝绳连接处；再安装补芯单元；S5、通过钢丝绳连接张紧器与张紧环；S6、解锁伸缩装置的内、外筒,提起补芯单元、球型接头,至球型接头轴肩上升至采矿平台台面位置；S7、安装卡紧盘,提升球型接头。优点是：改善和减少管道端部弯曲应力,补偿采矿作业平台的升沉运动对硬管系统所造成的影响,保证矿浆输送顺利实现。(A pipe ship connection method suitable for deep sea mining comprises S1, installing a support plate, lowering an adjusting short section and a telescopic device, connecting the telescopic device with a last hard pipe, and lifting a pipe string consisting of the adjusting short section and the telescopic device; s2, installing a core supplementing unit in the support disc; s3, after the ball joint is lowered, the ball joint is connected with the adjusting short section, and the core supplementing unit is removed; s4, lowering the spherical joint, adjusting the short section, and stringing the telescopic device to the joint of the tension ring on the telescopic device and the steel wire rope on the tensioner; then installing a core supplementing unit; s5, connecting the tensioner and the tensioning ring through a steel wire rope; s6, unlocking the inner cylinder and the outer cylinder of the telescopic device, and lifting the core supplementing unit and the ball joint until the shaft shoulder of the ball joint rises to the position of the table top of the mining platform; and S7, mounting a clamping disc and lifting the spherical joint. The advantages are that: the bending stress of the end part of the pipeline is improved and reduced, the influence of the heave motion of the mining operation platform on a hard pipe system is compensated, and the smooth implementation of ore pulp conveying is ensured.)

1. A pipe ship connecting method suitable for deep sea mining is characterized by comprising the following steps:

s1, after the supporting plate (1) is installed on the mining platform (2), the adjusting short section (3) and the telescopic device (4) are placed, the telescopic device (4) is connected with the last hard tube (5), and then the tube string formed by the adjusting short section (3) and the telescopic device (4) is lifted until the adjusting short section (3) is higher than the upper end face of the supporting plate (1) in the bearing shoulder;

s2, installing a core supplementing unit in the supporting disc (1) for clamping the adjusting short section (3);

s3, lowering the ball joint (7), connecting the ball joint with the adjusting short section (3), and removing the core supplementing unit;

s4, lowering the ball joint (7), adjusting the short section (3), and stringing the telescopic device (4) to the joint of the tension ring (4-1) on the telescopic device (4) and the steel wire rope on the tensioner (8); installing a core supplementing unit to enable the weight of all the pipe strings to be located on the manual slips of the core supplementing unit;

s5, connecting the tensioner (8) and the tensioning ring (4-1) through a steel wire rope, connecting a locking mechanism in the telescopic device (4) and sealing a hydraulic pipeline, and gradually pressurizing the tensioner (8) to enable the weight of the pipe string to be completely borne by the steel wire rope;

s6, the inner cylinder and the outer cylinder of the telescopic device (4) are unlocked by pressing the locking mechanism, and the core supplementing unit and the spherical joint (7) are lifted until the shaft shoulder of the spherical joint rises to the position of the table top of the mining platform (2);

s7, installing a clamping disc (9), lifting the spherical joint (7), connecting the upper flange of the spherical joint (7) with the ore pulp discharge elbow (10), sealing and pressing the expansion device (4), and realizing dynamic sealing of the internal fluid.

2. The pipe-vessel coupling method for deep sea mining according to claim 1, wherein: the core supplementing unit comprises a core supplementing body, a lining and a manual slip.

3. The pipe-vessel coupling method for deep sea mining according to claim 1, wherein: the clamping disc (9) comprises a lower supporting table (9-1), an upper pressing plate (9-2) and a connecting accessory, and a cavity is formed between the lower supporting table (9-1) and the upper pressing plate (9-2) to clamp a shoulder arranged on the pipeline.

4. A pipe-vessel coupling method suitable for deep sea mining according to claim 3, characterized in that: the connecting accessory comprises a pin shaft and a bolt, the pin shaft is used for connecting the lower supporting platform (9-1) with the supporting plate (1), and the bolt is used for connecting the upper pressing plate (9-2) with the lower supporting platform and clamping the shoulder of the hard tube (5).

5. The pipe-vessel coupling method for deep sea mining according to claim 4, wherein: in S7, the method includes the steps of:

s71, installing a lower supporting platform (9-1), connecting the lower supporting platform (9-1) with a supporting disk (1) pin shaft, and seating a shaft shoulder of a lifting spherical joint (7) on the lower supporting platform (9-1);

s72, installing an upper pressure plate (9-2), and connecting bolts for connecting the upper pressure plate (9-2) and a lower support platform (9-1); the upper flange of the ball joint (7) is connected with an ore pulp discharge elbow (10).

6. The pipe-vessel coupling method for deep sea mining according to claim 1, wherein: the tensioning ring (4-1) comprises a cylinder body (4-1-1), a plurality of groups of lug plates (4-1-2) and adapter connectors (4-1-3), the cylinder body (4-1-1) is used for being sleeved on an outer cylinder of the telescopic device (4) in a stacking mode, the lug plates (4-1-2) are circumferentially distributed along the outer wall of the cylinder body (4-1-1) and fixedly connected to the cylinder body (4-1-1), each lug plate (4-1-2) is correspondingly and rotatably connected with one adapter connector (4-1-3), and the adapter connectors (4-1-3) are connected with the tensioning ring (4-1) of the telescopic device (4) through steel wire ropes (8-1).

7. The pipe-vessel coupling method for deep sea mining according to claim 6, wherein: a gap is reserved between the cylinder (4-1-1) and the outer cylinder of the telescopic device (4), and a supporting step for limiting the cylinder (4-1-1) to move up and down is arranged on the outer cylinder of the telescopic device (4).

8. The pipe-vessel coupling method for deep sea mining according to claim 6, wherein: the ear plates (4-1-2) are arranged on the cylinder body (4-1-1) in a vertically staggered manner.

9. The pipe-vessel coupling method for deep sea mining according to claim 6, wherein: the ear plate (4-1-2) is provided with a through hole, and one end of the adapter (4-1-3) is rotatably connected with the through hole of the ear plate (4-1-2) through a pin shaft.

10. The pipe-vessel coupling method for deep sea mining according to claim 6, wherein: an installation interface is arranged at one end of the conversion joint (4-1-3) deviating from the ear plate (4-1-2), and a steel wire rope (8-1) used for connecting the tensioning ring (4-1) is arranged at the interface.

Technical Field

The invention relates to the technical field of deep sea mining, in particular to a pipe ship connection method suitable for deep sea mining.

Background

Deep sea mining engineering is a complex system engineering involving numerous disciplines. The underwater pipe string is hung below the mining platform, is laid under the water for hundreds of meters to thousands of meters, and is connected with underwater equipment such as an underwater mining vehicle, a hose, a relay station, a lifting pump and the like. In the mining operation engineering, the mining platform can generate heave motion under the influence of environmental factors such as wind, wave and flow, so that the distance between the platform and the seabed fluctuates, the underwater pipe string can cause recoil due to the influence of the heave motion, impact is caused to the pipe string and the operation platform, meanwhile, angular deviation can be generated between the underwater conveying pipe string and the operation platform, and the hard pipe can be failed and damaged after the bending moment between the hard pipe and the platform exceeds the bearing range of the pipe string. The manner of connection between the hard pipe and the mining platform is therefore particularly important during mining operations.

Disclosure of Invention

The invention provides a pipe ship connection method suitable for deep sea mining, and aims to solve the problems of heave movement caused by the influence of environmental factors such as wind, wave, flow and the like in deep sea mining engineering and failure and damage of a hard pipe caused by overlarge bending moment of the top of the hard pipe, and ensure the safety and reliability of the whole mining engineering.

In order to achieve the above purpose, the invention provides the following technical scheme:

the invention relates to a pipe ship connection method suitable for deep sea mining, which comprises the following steps:

s1, after the supporting plate is installed on the mining platform, the adjusting short section and the telescopic device are lowered, the telescopic device is connected with the last hard tube, and then the tube string consisting of the adjusting short section and the telescopic device is lifted until the bearing shoulder is higher than the upper end face of the supporting plate;

s2, installing a core supplementing unit in the supporting disc for clamping and adjusting the short section;

s3, after the ball joint is lowered, the ball joint is connected with the adjusting short section, and the core supplementing unit is removed;

s4, lowering the spherical joint, adjusting the short section, and stringing the telescopic device to the joint of the tension ring on the telescopic device and the steel wire rope on the tensioner; installing a core supplementing unit to enable the weight of all the pipe strings to be located on the manual slips of the core supplementing unit;

s5, connecting the tensioner and the tensioning ring through a steel wire rope, connecting the locking mechanism in the telescopic device and sealing the hydraulic pipeline, and gradually pressurizing the tensioner to enable the weight of the pipe string to be completely borne by the steel wire rope;

s6, pressing the locking mechanism to unlock the inner cylinder and the outer cylinder of the telescopic device, lifting the core supplementing unit and the ball joint until the shaft shoulder of the ball joint rises to the position of the table top of the mining platform;

s7, installing a clamping disc, lifting the spherical joint, enabling an upper flange of the spherical joint to be connected with the ore pulp discharge elbow, sealing and pressing the telescopic device, and achieving dynamic sealing of internal fluid.

Preferably, the bushing unit comprises a bushing, a bushing and a manual slip.

Preferably, the clamping disc comprises a lower supporting platform, an upper pressing plate and a connecting accessory, wherein a cavity is formed between the lower supporting platform and the upper pressing plate so as to clamp a shoulder arranged on the pipeline.

Preferably, the connecting accessory comprises a pin shaft and a bolt, the pin shaft is used for connecting the lower support platform and the support plate, and the bolt is used for connecting the upper pressure plate and the lower support platform and clamping the hard tube shoulder.

Preferably, in S7, the method includes the following steps:

s71, mounting a lower supporting platform, connecting the lower supporting platform with a supporting disk pin shaft, and seating a shaft shoulder of the lifting ball joint on the lower supporting platform;

s72, installing an upper pressure plate and connecting bolts for connecting the upper pressure plate and the lower supporting platform; the upper flange of the spherical joint is connected with the ore pulp discharge elbow.

Preferably, the tensioning ring comprises a cylinder body, a plurality of groups of lug plates and adapter connectors, the cylinder body is used for being overlapped on the outer cylinder of the expansion device, the lug plates are circumferentially distributed along the outer wall of the cylinder body and are fixedly connected to the cylinder body, each lug plate is correspondingly and rotatably connected with one adapter connector, and the adapter connectors are connected with the tensioning ring of the expansion device through steel wire ropes.

Preferably, a gap is left between the cylinder and the outer cylinder of the telescopic device, and a supporting step for limiting the up-and-down movement of the cylinder is arranged on the outer cylinder of the telescopic device.

Preferably, the ear plates are staggered up and down on the cylinder.

Preferably, the lug plate is provided with a through hole, and one end of the adapter is rotatably connected to the through hole of the lug plate through a pin shaft.

Preferably, an installation interface is arranged at one end of the conversion joint, which is far away from the ear plate, and a steel wire rope used for connecting the tension ring is arranged at the interface.

The pipe ship connecting method suitable for deep sea mining has the advantages that:

1. by adopting the technical scheme, the invention can ensure that when the hard pipe string deflects due to the action of environmental factors such as wind, wave, flow and the like or the pipeline angle deflects due to drift/swing motion of the mining platform, dynamic relative heave displacement can occur at the water surface mining platform and the tail end of the pipeline, the bending stress of the end part of the pipeline is improved and reduced, the influence of the heave motion of the mining platform on the hard pipe system is compensated, and the smooth implementation of ore pulp conveying is ensured;

2. in the technical scheme of the invention, the design of the supporting disk, the clamping disk and other structures limits the radial force and the axial force of the pipe string, and effectively avoids the risk of damaging a lifting system due to the recoil force of the pipe string;

3. in the technical scheme of the invention, the clamping disc mainly prevents the recoil force generated by the relative motion of the inner cylinder and the outer cylinder to the inner cylinder when the telescopic device works normally, and ensures the relative fixation of the inner cylinder of the telescopic device in the axial direction and the radial direction, thereby ensuring the stable connection of the top and the base platform when the pipe string works normally.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. In the drawings:

FIG. 1 is a schematic view of a pipe ship connection state during lowering;

FIG. 2 is a schematic view of the pipe ship in operation;

FIG. 3 is an enlarged view of the structure at A in FIG. 1;

FIG. 4 is a schematic view of the tension ring;

FIG. 5 is a schematic structural diagram of section B in FIG. 4;

FIG. 6 is a schematic view of the structure of the plane C-C in FIG. 5;

wherein:

the device comprises a supporting plate 1, a mining platform 2 and an adjusting short joint 3;

the device comprises a telescopic device 4, a tension ring 4-1, a cylinder 4-1-1, an ear plate 4-1-2 and a conversion joint 4-1-3;

a hard tube 5, a core supplementing unit 6 and a spherical joint 7;

a tensioner 8 and a steel wire rope 8-1;

a clamping disc 9, a lower supporting table 9-1 and an upper pressing plate 9-2;

the slurry exits the elbow 10.

Detailed Description

The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.

Referring to fig. 1 to 3, the present invention provides a pipe-ship connection method suitable for deep sea mining, including the following steps:

s1, after the supporting plate 1 is installed on the mining platform 2, the adjusting short section 3 and the telescopic device 4 are lowered, the telescopic device 4 is connected with the last hard tube 5, and then the tube string formed by the adjusting short section 3 and the telescopic device 4 is lifted until the adjusting short section 3 is adjusted until the bearing shoulder is higher than the upper end face of the supporting plate 1;

s2, installing a core supplementing unit 6 in the supporting disc 1 for clamping the adjusting short section 3;

s3, lowering the ball joint 7, connecting the ball joint with the adjusting short section 3, and removing the core supplementing unit 6;

s4, lowering the ball joint 7, adjusting the short section 3 and the telescopic device 4 to the joint of the tension ring 4-1 on the telescopic device 4 and the steel wire rope 8-1 on the tensioner 8; installing the core supplementing unit 6 to enable the weight of all the pipe strings to be located on the manual slips of the core supplementing unit 6;

s5, connecting the tensioner 8 and the tensioning ring 4-1 through the steel wire rope 8-1, and after connecting the locking mechanism in the telescopic device 4 and sealing the hydraulic pipeline, gradually pressurizing the tensioner 8 to enable the weight of the pipe string to be completely born by the steel wire rope 8-1;

s6, the inner cylinder and the outer cylinder of the telescopic device 4 are unlocked by pressing the locking mechanism, and the core supplementing unit 6 and the spherical joint 7 are lifted until the shaft shoulder of the spherical joint 7 rises to the position of the table top of the mining platform 2;

s7, installing a clamping disc 9, lifting the spherical joint 7, enabling the upper flange of the spherical joint 7 to be connected with the ore pulp discharge elbow 10, sealing and pressing the expansion device 4, and realizing dynamic sealing of internal fluid.

In the method, when the hard pipe 5 and the mining platform 2 have relative rotation tendency due to ship movement or external loading, the ball joint 7 serves as elastic corner constraint, allows certain relative angular displacement between the hard pipe 5 and the mining platform, and reduces the stress of a contact position so as to improve and reduce the local bending stress of the hard pipe 5;

in the working process of the pipe ship, when the telescopic device 4 is placed down, the inner barrel and the outer barrel are in a contraction and locking state, the inner barrel and the outer barrel are easy to load, unload and lift on the ship, after the telescopic device 4 is placed down and is connected with heave compensation, the inner barrel and the outer barrel of the telescopic device 4 are unlocked hydraulically, at the moment, the inner barrel and the outer barrel of the telescopic device 4 are separated and start to work, the stroke compensation function is realized, and the sealing assembly driving barrel in the telescopic device 4 is pressurized after the telescopic device is installed in place so as to realize dynamic sealing on internal fluid.

In a specific embodiment, step S7 includes the following steps:

s71, installing a lower supporting platform 9-1, connecting the lower supporting platform 9-1 with a supporting disk 1 pin shaft, and seating a shaft shoulder of a lifting spherical joint 7 on the lower supporting platform 9-1;

s72, installing an upper pressure plate 9-2, and connecting bolts for connecting the upper pressure plate 9-2 and the lower support platform 9-1; the upper flange of the ball joint 7 is connected with a slurry discharge elbow 10.

In the prior art, the chuck can limit the radial and axial downward force of the pipeline, but cannot limit the axial upward force of the pipeline, and when the telescopic device 4 works normally, the inner barrel and the outer barrel move relatively to generate recoil force to the inner barrel, so that the pipe string can impact the lifting system upwards, and risks exist. Therefore, in the technical scheme of the invention, as shown in fig. 3, a clamping disc 9 is disclosed, which consists of a lower supporting table 9-1, an upper pressing plate 9-2 and connecting accessories, wherein the upper pressing plate 9-2 is positioned above the lower supporting table 9-1; a cavity is formed between the lower supporting platform 9-1 and the upper pressing plate 9-2 to clamp a shoulder arranged on the pipeline so as to realize the radial positioning of the vertical pipe of the hard pipe 5; the hard tube 5 can be axially positioned by the through holes in the middle parts of the lower supporting platform 9-1 and the upper pressing plate 9-2;

in more detail, the connecting accessory comprises a pin shaft and a bolt, the pin shaft is used for connecting the lower support platform 9-1 and the support plate 1, and the bolt is used for connecting the upper pressure plate 9-2 and the lower support platform 9-1 and clamping the shoulder of the hard tube 5; the clamping disc 9 is integrally of a two-petal structure, so that the installation is convenient; the purpose is to prevent the recoil force generated by the relative motion of the inner barrel and the outer barrel of the expansion device 4 to the inner barrel during normal work, and ensure the relative fixation of the inner barrel of the expansion device 4 in the axial direction and the radial direction, thereby ensuring the stable connection of the top and the base platform of the hard pipe 5 string during normal operation.

In the specific embodiment, the refill unit 6 is a commercially available product, and includes a refill, a bushing, and a manual slip.

In the invention, a supporting disk 1 and a clamping disk 9 jointly act on the clamping of a pipeline; and supporting disk 1 is the product that can purchase in current market, including supporting disk body, cushion, hoisting screw, plug, rotating pin. The supporting disc 1 is of a lower round upper structure, and a through hole is formed in the supporting disc; the cushion block is used for supporting the support disc body, and after the drilling machine is installed and positioned, the cushion block is welded on the mining platform 2; 4 ear plates 8-3 are arranged at the upper part of the supporting disc 1 and used for hoisting the supporting disc 1 and also used for installing components on the supporting disc 1; two adjacent sides of the supporting plate 1 are provided with 8 connecting holes for mounting threads, and the connecting holes correspond to the threaded holes in the cushion block; supporting disk 1 is equipped with 4 rotating pins and clamp plate, mutually supports with the slips for the rotation of restriction slips in supporting disk 1 inside, transmission reaction torque. More specifically, the support plate 1 is bolted to the mining platform 2, and 4 sets of lugs are provided to which the clamping plate 9 is attached. The supporting disk 1 is a structural member, and the overall structure of the assembly is compact.

In a specific embodiment, as shown in fig. 4-6, the tensioner 8 further includes a cylinder 4-1-1, a plurality of sets of ear plates 4-1-2 and adapter joints 4-1-3, the cylinder 4-1-1 is used to be stacked on the outer cylinder of the expansion device 4, the ear plates 4-1-2 are circumferentially distributed along the outer wall of the cylinder 4-1-1 and fixedly connected to the cylinder 4-1-1, each ear plate 4-1-2 is correspondingly and rotatably connected with one adapter joint 4-1-3, and the adapter joint 4-1-3 is connected with the tension ring 4-1 of the expansion device 4 through a steel wire rope 8-1. A gap is reserved between the cylinder 4-1-1 and the outer cylinder of the telescopic device 4, so that the cylinder 4-1-1 can rotate relative to the outer cylinder when in work to adapt to the deflection of the hard pipe 5 caused by the influence of sea conditions; and the outer cylinder of the telescopic device 4 is provided with a supporting step (not shown in the figure) for limiting the up-and-down movement of the cylinder 4-1-1, and is used for limiting the up-and-down movement amplitude of the tensioning ring 4-1 and the cylinder 4-1-1 during the work.

Preferably, the ear plates 4-1-2 can be arranged on the outer surface of the cylinder body 4-1-1 in a vertically staggered manner, so that the tensioner 8 is more compact in structure and occupies less space; a through hole is arranged on the ear plate 4-1-2, one end of the conversion joint 4-1-3 is rotatably connected with the through hole of the ear plate 4-1-2 through a pin shaft, an installation interface is arranged at the other end of the conversion joint 4-1-3, a steel wire rope 8-1 for connecting the tension ring 4-1 is arranged at the interface, and the installed conversion joint 4-1-3 can be turned over up and down along the pin shaft on the conversion joint to adapt to the action position of the tensioner 8; the included angle between the adjacent ear plates 4-1-2 is matched with the included angle between the steel wire ropes 8-1 of the tensioner 8.

The structures not described in detail herein are all conventional in the art and therefore are not described in detail.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.