CN110227693B - Underwater equipment for disassembling and cleaning submarine pipeline - Google Patents

Abstract

The invention relates to underwater equipment for disassembling and cleaning a submarine pipeline, which comprises an outer cylinder system, a propeller propulsion system, a circuit integration system, a dredging system, a hoisting pipeline device and an underwater fixing device. The invention has the advantages that: the underwater equipment for disassembling and cleaning the submarine pipeline has the advantages of reasonable and simple structure, easy production and manufacture, low cost, convenient use and high operation efficiency; cleaning sludge around the pipeline by using a high-pressure water gun before disassembling the pipeline, and laying a cushion for the subsequent cleaning; the disassembly work of the submarine pipeline is more efficient and flexible, the construction process is simpler and shorter in consumed time, the limit of the offshore construction environment is avoided, submarine pipeline equipment can be disassembled safely and efficiently, the deformation of the submarine pipeline at the joint is effectively reduced, and the marine pollution caused by the leakage of residual oil and gas resources in the pipeline is prevented.

Description

Underwater equipment for disassembling and cleaning submarine pipeline

Technical Field

The invention belongs to the field of ocean platforms, and particularly relates to underwater equipment for disassembling and cleaning submarine pipelines.

Background

During the service period of the ocean platform, the parts are inevitably exposed to aging and rusting, which is directly related to the service life of the ocean platform. With the development of science and technology, semi-submersible ocean platforms have been in history for decades. It has been upgraded to the sixth generation. Under the rapid development of the ocean engineering industry, the dismantling, cleaning and transportation of old submarine pipelines are inevitable work.

When the ocean platform is decommissioned for disassembly, the disassembly and cleaning work of the deeply buried submarine pipeline is very important. Because the underwater conditions of the seabed are complex and unknown, the oil pipe is relatively fragile and sensitive, the leakage of the oil pipe can be caused by carelessness, the seawater is greatly polluted, and the economic loss is directly caused, which is immeasurable. During the dismantling and transport of subsea pipelines, dust and debris adhering to the pipelines can cause great difficulties in transporting and cleaning the pipelines. Therefore, cleaning and transporting work in the pipeline dismounting process is one of the problems which need to be solved urgently in the offshore platform dismounting, and especially, the research for improving the precision of the pipeline dismounting is more important.

The existing submarine pipeline dismantling method mainly adopts offshore lifting and loading to dismantle in sections or adopts integral dragging and land sectioning. The existing modes for cleaning pipelines mainly comprise an ultrahigh pressure water jet technology and a mechanical pipe cleaner ball-passing pipe cleaning technology. The disadvantages of these approaches are: (1) the construction process is complex, and the offshore construction time is long; (2) the offshore construction site is limited, and the difficulty is high; (3) the towing uncertainty factor of the sea area is multiple, and other sea area structures are easy to collide; (4) the pipeline has higher landing difficulty, occupies wharfs or docks and has high dismantling cost.

Disclosure of Invention

The invention aims to solve the technical problem of providing the underwater equipment for disassembling and cleaning the submarine pipeline, which has the characteristics of high flexibility, high mud and sand removing efficiency, convenience in operation and control and the like under normal work, can greatly reduce the risk of fracture at the pipeline joint when the pipeline is disassembled, and plays a role in effectively protecting the integrity of the pipeline.

In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides a disassemble and wash underwater equipment of submarine pipeline which innovation point lies in: comprises that

The outer cylinder system comprises a frustum pyramid cavity cylinder, two rectangular steel plates which are arranged in a crossed mode are fixed on two sides of the frustum pyramid cavity cylinder, and a plurality of elliptical small holes are uniformly and transversely distributed in the top end face of the frustum pyramid cavity cylinder;

the propeller propulsion system comprises propeller thrusters symmetrically arranged on one side of the frustum pyramid-shaped cavity cylinder and propeller thrusters symmetrically arranged on the side part of the top end surface of the frustum pyramid-shaped cavity cylinder;

the circuit integrated system comprises a circuit box arranged at one corner of the top end face of the cylinder body with the frustum pyramid-shaped cavity, a circuit for integrating the propeller propulsion system is arranged in the circuit box, and the circuit integrated system is connected with the main ship;

the dredging system comprises a high-pressure water gun arranged at the center of the inner side wall of the top end of the frustum-shaped cavity barrel, the high-pressure water gun comprises a water gun base, one side end of the water gun base is provided with a water inlet communicated with the water gun base, the center of the lower end surface of the water gun base is provided with a water pressure rotary spray nozzle fixing seat communicated with the water gun base, and the water pressure rotary spray nozzle fixing seat is provided with a plurality of water pressure rotary spray nozzles distributed radially;

the hoisting pipeline device comprises an electric sliding rod, a hydraulic jack and a lifting hook, the hoisting pipeline device is fixed at the intersection of rectangular steel plates which are arranged at two sides in a crossed mode, the hydraulic jack is arranged on the electric sliding rod in a sliding mode, and the lifting hook is fixedly arranged in the center of the bottom end of the hydraulic jack;

fixing device under water, fixing device includes that the level transversely arranges the piston at both ends around the frustum of a pyramid shape cavity barrel bottom, the piston passes through actuating mechanism drive motion, the one end of piston is connected with the three-section bent axle that is Z style of calligraphy and arranges, and wherein, the third section bent axle is connected with the stock that length is whole frustum of a pyramid shape cavity barrel length, has evenly arranged a plurality of teeth of a cogwheel on each stock, all has meshed the gear under every teeth of a cogwheel, with teeth of a cogwheel transmission each other, and still welded fastening has the rigidity centrum structure in the bottom of every gear.

Furthermore, the water pressure rotary sprayer comprises a connector which is connected with the water pressure rotary sprayer fixing seat and is provided with an inner cavity, one end of the connector, which is far away from the water pressure rotary sprayer fixing seat, is connected with a shell through a boss connecting structure, and the shell is provided with a plurality of water spray holes which are uniformly distributed along the axial direction of the shell; the joint end arranged in the shell is connected with a water distribution disc through an O-shaped sealing ring, an eccentric nozzle is movably connected between the water distribution disc and the shell far away from one end of the water pressure rotating nozzle fixing seat, and a sealing ring gasket is further arranged on the inner wall of the shell far away from one end of the water pressure rotating nozzle fixing seat.

Furthermore, the water gun base comprises a motor mounting plate, a gear seat and a water pressure rotary spray nozzle connecting seat which are sequentially arranged from top to bottom;

the motor mounting plate is provided with a driving motor mounting hole, and the motor mounting plate is fixedly connected with the center of the gear seat through a connecting shaft; the gear seat is provided with an internal gear, a driving motor is arranged in the driving motor mounting hole, and the internal gear is fixedly connected with a driving shaft of the driving motor; the outer side of the internal gear is also provided with a gear meshed with the internal gear, a plurality of trundles which are uniformly distributed along the circumferential direction of the gear are also arranged on a gear seat on the outer side of the gear, and the hydraulic pressure rotating nozzle connecting seat is fixedly connected with the lower end face of the gear.

The invention has the advantages that:

(1) the underwater equipment for disassembling and cleaning the submarine pipeline has the advantages of reasonable and simple structure, easy production and manufacture, low cost, convenient use and high operation efficiency; cleaning sludge around the pipeline by using a high-pressure water gun before disassembling the pipeline, and laying a cushion for the subsequent cleaning; the disassembly work of the submarine pipeline is more efficient and flexible, the construction process is simpler and shorter in time consumption, the limit of the offshore construction environment is avoided, submarine pipeline equipment can be disassembled safely and efficiently, the deformation of the submarine pipeline at the joint is effectively reduced, and the marine pollution caused by the leakage of residual oil and gas resources in the pipeline is prevented;

(2) the underwater equipment for disassembling and cleaning the submarine pipeline is characterized in that the outer cylinder system is designed into the prismoid cavity, so that the resistance of the equipment under water can be reduced, and certain impact can be effectively resisted; a plurality of elliptical small holes are uniformly and transversely arranged at the top of the cavity, and the elliptical small holes are used for discharging the seawater accumulated due to pressure difference when the equipment enters underwater, so that the seawater can be quickly and stably dropped to a preset seabed;

(3) the invention discloses underwater equipment for disassembling and cleaning submarine pipelines, wherein a water pressure rotating spray head adopts a combination form of a joint, a shell, an O-shaped ring, a water distribution disc, an eccentric nozzle and a sealing ring gasket, pressure water enters the whole spray head from the joint, enters an inner cavity of the shell through a water hole tangential to the water distribution disc, and is jetted through a small hole to enable water flow in the cavity to rotate at a high speed, a flow field generated by the rotating water flow pushes the eccentric nozzle placed in the inner cavity to automatically rotate around an axis, and the eccentric nozzle is movable in the shell, the eccentric distance of the eccentric nozzle is not equal to zero, so that high-pressure water jet jetted from the nozzle is formed into spiral rotating jet, and the sealing ring gasket can reduce friction and play a role of water.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic view of the structure of the subsea equipment for dismantling and cleaning subsea pipelines according to the present invention.

Fig. 2 is an enlarged view of a portion 1 of fig. 1.

Fig. 3 is a schematic diagram of the piston in a of fig. 1 in operation.

Fig. 4 is a partially enlarged view of a in fig. 1.

Fig. 5 is a schematic diagram of a high-pressure water gun 4 in fig. 1.

Fig. 6 is a sectional view showing the structure of the water pressure rotary sprinkler.

Fig. 7 is a schematic structural diagram of a water gun base.

Fig. 8 is an enlarged view of part 5 of fig. 1.

Detailed Description

The following examples are presented to enable one of ordinary skill in the art to more fully understand the present invention and are not intended to limit the scope of the embodiments described herein.

Examples

The underwater equipment for disassembling and cleaning the submarine pipeline in the embodiment comprises an outer cylinder system, a propeller propulsion system 3, a circuit integrated system, a dredging system 4, a hoisting pipeline device 5 and an underwater fixing device A as shown in figure 1.

The specific structure of the outer cylinder system, as shown in fig. 2, comprises a frustum pyramid shaped cavity cylinder 1, and the frustum pyramid shaped cavity can reduce the resistance of the device under water and can effectively resist certain impact; as a support of the frustum pyramid cavity cylinder 1, two rectangular steel plates 11 and 12 which are arranged in a crossed mode are fixed on two sides of the frustum pyramid cavity cylinder 1, three elliptical small holes 13, elliptical small holes 14 and elliptical small holes 15 are evenly and transversely arranged on the top end face of the frustum pyramid cavity cylinder, and the frustum pyramid cavity cylinder is used for discharging seawater accumulated due to pressure difference when the device enters underwater and can be quickly and stably lowered to a preset seabed.

In the embodiment, the circuit integrated system, as shown in fig. 1, comprises a circuit box 2 arranged at one corner of the top end face of a prismatic-table-shaped cavity barrel 1, a circuit for integrating the propeller propulsion system is arranged in the circuit box 2, and the circuit integrated system is connected with a main ship; the propeller propulsion system 3 comprises propeller propellers 31 and 32 which are symmetrically arranged on one side of the frustum pyramid-shaped cavity barrel 1, and propeller propellers 33 and 34 which are symmetrically arranged on the side part of the top end face of the frustum pyramid-shaped cavity barrel 1. In particular operation, the top two propellers 33, 34 are responsible for the up and down movement of the apparatus. When the two propellers work simultaneously, the up-and-down movement of the equipment can be realized, and when one propeller works alone, the inclined posture of the equipment can be realized so as to deal with the uneven pipelines which may appear. The two side- wall propellers 31, 32 are responsible for forward and backward movement of the plant. When the two propellers work simultaneously, the back-and-forth movement of the equipment can be realized, and when one propeller works alone, the steering of the equipment can be realized so as to correspond to a pipeline with possible steering.

The propeller thruster mainly utilizes the high-speed rotation of the propeller to push water flow and generates reaction force to push underwater equipment to advance, the thruster is simple in structure and small in size, and therefore the thruster is flexible in application, the thruster is made of aluminum alloy materials, and the materials have good corrosion resistance and high corrosion resistance and can resist certain underwater impact force; in addition, the propeller in the propeller comprises three blades, the rotating speed is high, the working efficiency can be guaranteed, the propeller can also prevent the winding of some aquatic weeds in water, and the occurrence of faults can be reduced.

As shown in fig. 3 and 4, the underwater fixing device a of the present invention is formed, and includes pistons A3 horizontally and transversely disposed at front and rear ends of the bottom of a frustum-shaped cavity cylinder 1, the pistons A3 is driven by a cylinder a1 to move, a piston ring a2 is sleeved at one end of the pistons A3, and three sections of crankshafts a4 disposed in a zigzag manner are connected to the other end of the pistons A3, wherein the third section of crankshaft is connected to a long rod a5 having a length equal to the length of the entire frustum-shaped cavity cylinder, four gear teeth A6 are uniformly disposed on each long rod a5, a gear a7 is engaged under each gear tooth A6, the gear a7 and the gear teeth A6 are in mutual transmission, and a rigid cone structure A8 is welded and fixed to the bottom of each gear a 7. In specific work, force F acts on the piston A3 and is transmitted to the crankshaft A4 and the electric slide bar A5, the electric slide bar A5 reciprocates, and the gear teeth A6 and the gear A7 are mutually transmitted, so that the angle of the rigid cone A8 can be changed. When the equipment sinks to the seabed, the rigid cone body penetrates into the seabed to play a role in fixing, and after the primary disassembling and cleaning operation is completed, soil on the seabed can be chiseled loose through the process, so that the equipment is better fixed and lifted.

The concrete structure of desilting system 4, as shown in fig. 5, including setting up the high-pressure squirt at the center of 1 top inside wall of terrace with edge shape cavity barrel, high-pressure squirt includes squirt base 42, and one side end of squirt base 42 is equipped with the water inlet 41 with squirt base 42 intercommunication, and the lower terminal surface center of squirt base 42 is equipped with the rotatory shower nozzle fixing base of water pressure with squirt base 42 intercommunication, and is provided with the rotatory shower nozzle 43 of three water pressure that is radial distribution on the rotatory shower nozzle fixing base of water pressure.

The specific structure of the hydraulic rotary sprinkler 43, as shown in fig. 6, includes a joint 431 connected to the hydraulic rotary sprinkler fixing seat and having an inner cavity, one end of the joint 431 far away from the hydraulic rotary sprinkler fixing seat is connected to a housing 432 through a boss connecting structure, and the housing 432 is provided with a plurality of water spray holes uniformly distributed along the axial direction of the housing; the end part of a joint 431 arranged in the shell is connected with a water distribution disc 434 through an O-shaped sealing ring 433, an eccentric nozzle 435 is movably connected between the water distribution disc 434 and the shell 432 at one end far away from the water pressure rotary sprayer fixing seat, and a sealing ring gasket 436 is arranged on the inner wall of the shell at one end far away from the water pressure rotary sprayer fixing seat; the pressure water enters the whole spray head from the joint 431, enters the inner cavity of the shell 432 through the tangential water holes of the water distribution disc 434, the pressure water jetted from the small holes enables the water flow in the cavity to rotate at high speed, the flow field generated by the rotating water flow pushes the eccentric nozzle 435 placed in the inner cavity to automatically rotate around the axis, the eccentric nozzle 435 is movable in the shell, the eccentricity is not equal to zero, the high-pressure water jet sprayed from the nozzle is formed in a spiral rotating jet shape, and the sealing ring pad 436 can reduce friction and play a role of water sealing at the same time.

In an embodiment, as shown in fig. 7, the water gun base 42 includes a motor mounting plate 421, a gear seat 422, and a hydraulic rotary nozzle connecting seat 423 sequentially disposed from top to bottom.

A driving motor mounting hole 4211 is formed in the motor mounting plate 421, and the motor mounting plate 421 is fixedly connected with the center of the gear seat 422 through a connecting shaft 424; an internal gear 4221 is arranged on the gear seat 422, a driving motor 425 is arranged in a driving motor mounting hole 4211, and the internal gear 4221 is fixedly connected with a driving shaft of the driving motor 425; a gear 4222 meshed with the internal gear 4221 is further arranged on the outer side of the internal gear 4221, a plurality of casters 4223 uniformly distributed along the circumferential direction of the gear are further arranged on a gear seat 422 on the outer side of the gear 4222, and the hydraulic pressure rotary nozzle connecting seat 423 is fixedly connected with the lower end face of the gear 4222 so as to realize the rotary motion of the rotary table. The driving motor 425 has a speed reducer, the gear 4222 is driven by the internal gear 4221 to have a speed reducing function, and the caster 4223 plays a supporting role.

In the embodiment, as shown in fig. 8, the suspended pipeline device 5 includes an electric sliding rod 51, a hydraulic jack 52 and a hook 53, the electric sliding rod 51 is fixed at the intersection of the rectangular steel plate 11 and the rectangular steel plate 12 which are arranged crosswise at both sides, the hydraulic jack 52 is slidably arranged on the electric sliding rod 51, and the hook 53 is fixedly arranged at the center of the bottom end of the hydraulic jack 52.

The working process of disassembling the underwater equipment for cleaning the submarine pipeline in the embodiment is as follows:

a. the two propellers 33 and 34 are simultaneously turned on to sink the equipment to the sea bottom, and the change of the inclination, steering and other postures of the equipment can be realized by independently turning on one or more of the four propellers, and finally the equipment reaches a preset position where the pipeline needs to be disassembled.

b. And opening the underwater fixing device A. A force is applied to the two pistons A3 to push and pull the electric slide bar 51, the gear A6 and the gear A7 on the electric slide bar 51 are mutually transmitted to realize the rotation of the gear A7, so that the rotation of the rigid cone A8 is pushed to realize the change of the angle of the rigid cone A8; the equipment is embedded into the seabed to play a role of fixing the equipment.

c. And cleaning the pipeline. As shown in fig. 1, the high-pressure water gun is started to clean sludge attached to the pipeline, and the high-pressure water gun can rotate the gun head 43 through water pressure to clean sludge around the pipeline in a large range. And after the dredging operation is finished, the hoisting pipeline system starts to work. As shown in fig. 1, the hydraulic jack 52 cooperates with the hook 53 to lift one end of the exposed pipeline, and the high-pressure water gun cleans the lifted pipeline. After the cleaning is completed, the lifting hook 53 hangs the pipeline and slides to the other end of the equipment through the electric sliding rod 51.

d. Repeating the work b, the soil around the rigid vertebral body A8 is loosened by the change of the angle of the rigid vertebral body A8, and the device can be better lifted.

e. The equipment is lifted by the propeller 33 and the propeller 34 and transferred to the next section by the cooperation of the two propellers, propeller 31 and propeller 32, where the cleaning line needs to be dismantled. The first four steps are repeated.

To this end, one cycle of disassembling and cleaning the underwater line is completed.

Through the process once or for many times, the pipeline is finally disassembled and dragged away from the seabed, and the work needs to be carried out in a matching way.

After the operation is finished, the equipment floats out of the water surface through the propeller thruster to be cleaned and maintained, so that the next operation can be carried out.

The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (3)

1. The utility model provides a disassemble and wash subsea equipment of submarine pipeline which characterized in that: comprises that

The outer cylinder system comprises a frustum pyramid cavity cylinder, two rectangular steel plates which are arranged in a crossed mode are fixed on two sides of the frustum pyramid cavity cylinder, and a plurality of elliptical small holes are uniformly and transversely distributed in the top end face of the frustum pyramid cavity cylinder;

the propeller propulsion system comprises propeller thrusters symmetrically arranged on one side of the frustum pyramid-shaped cavity cylinder and propeller thrusters symmetrically arranged on the side part of the top end surface of the frustum pyramid-shaped cavity cylinder;

the circuit integrated system comprises a circuit box arranged at one corner of the top end face of the cylinder body with the frustum pyramid-shaped cavity, a circuit for integrating the propeller propulsion system is arranged in the circuit box, and the circuit integrated system is connected with the main ship;

the dredging system comprises a high-pressure water gun arranged at the center of the inner side wall of the top end of the frustum-shaped cavity barrel, the high-pressure water gun comprises a water gun base, one side end of the water gun base is provided with a water inlet communicated with the water gun base, the center of the lower end surface of the water gun base is provided with a water pressure rotary spray nozzle fixing seat communicated with the water gun base, and the water pressure rotary spray nozzle fixing seat is provided with a plurality of water pressure rotary spray nozzles distributed radially;

the hoisting pipeline device comprises an electric sliding rod, a hydraulic jack and a lifting hook, wherein the electric sliding rod is fixed at the intersection of rectangular steel plates which are arranged at two sides in a crossed manner, the hydraulic jack is arranged on the electric sliding rod in a sliding manner, and the lifting hook is fixedly arranged at the center of the bottom end of the hydraulic jack;

fixing device under water, fixing device includes that the level transversely arranges the piston at both ends around the frustum of a pyramid shape cavity barrel bottom, the piston passes through actuating mechanism drive motion, the one end of piston is connected with the three-section bent axle that is Z style of calligraphy and arranges, and wherein, the third section bent axle is connected with the stock that length is whole frustum of a pyramid shape cavity barrel length, has evenly arranged a plurality of teeth of a cogwheel on each stock, all has meshed the gear under every teeth of a cogwheel, with teeth of a cogwheel transmission each other, and still welded fastening has the rigidity cone structure in the bottom of every gear.

2. The dismantling subsea equipment for cleaning subsea pipelines according to claim 1, wherein: the water pressure rotary sprayer comprises a connector which is connected with a water pressure rotary sprayer fixing seat and is provided with an inner cavity, one end of the connector, which is far away from the water pressure rotary sprayer fixing seat, is connected with a shell through a boss connecting structure, and the shell is provided with a plurality of water spray holes which are uniformly distributed along the axial direction of the shell; the end part of the joint arranged in the shell is connected with a water distribution disc through an O-shaped sealing ring, an eccentric nozzle is movably connected between the water distribution disc and the shell far away from one end of the water pressure rotating nozzle fixing seat, and a sealing ring gasket is arranged on the inner wall of the shell far away from one end of the water pressure rotating nozzle fixing seat.

3. The dismantling subsea equipment for cleaning subsea pipelines according to claim 1 or 2, wherein: the water gun base comprises a motor mounting plate, a gear seat and a water pressure rotary spray nozzle connecting seat which are sequentially arranged from top to bottom;

the motor mounting plate is provided with a driving motor mounting hole, and the motor mounting plate is fixedly connected with the center of the gear seat through a connecting shaft; the gear seat is provided with an internal gear, a driving motor is arranged in the driving motor mounting hole, and the internal gear is fixedly connected with a driving shaft of the driving motor; the outer side of the internal gear is also provided with a gear meshed with the internal gear, a plurality of trundles which are uniformly distributed along the circumferential direction of the gear are also arranged on a gear seat on the outer side of the gear, and the hydraulic pressure rotating nozzle connecting seat is fixedly connected with the lower end face of the gear.

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