CN214116751U

CN214116751U - Ditching device for laying submarine pipeline

Info

Publication number: CN214116751U
Application number: CN202023114698.XU
Authority: CN
Inventors: 陈利琼; 詹文文; 王福祥; 郑猛; 张开
Original assignee: Southwest Petroleum University
Current assignee: Southwest Petroleum University
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-09-03
Anticipated expiration: 2030-12-22

Abstract

The utility model discloses a submarine pipeline lays furrow opener is applicable to the stereoplasm soil sand seabed ditching operation of 500 meters of depth of water. The device includes the drill bit, the sword tooth, the rotation axis, mechanical seal, the nozzle, the shell body, pole in the push-and-pull rod, the outer pole of push-and-pull rod, the dead lever, fixed fastener, the filter screen, the hose, the inner tube, the internal pump fixing base, the inlet tube, the outlet pipe, waterproof motor, components such as reduction gear, waterproof motor drive reduction gear, make it drive the rotation axis, sword tooth and drill bit are rotatory, adopt special top branching drill bit, the ability of breaking ground is stronger, push-and-pull rod control furrow opener operation angle and degree of depth, the sea water of internal pump suction is through the nozzle pressurization, the high pressure water can break up stereoplasm sand piece and reduce the ditching resistance, adopt machinery and hydraulic ram the compound form to carry out the ditching operation to the seabed. The utility model has the advantages of good ditching effect, high working efficiency, stable working state, economic safety and the like.

Description

Ditching device for laying submarine pipeline

Technical Field

The utility model relates to a submarine pipeline lays furrow opener is applicable to the stereoplasm soil sand seabed ditching operation of 500 meters of depth of water, belongs to ocean engineering and equips technical field.

Background

The development of marine resources by mankind in the 21 st century is in a brand new stage, the development and construction scale of marine oil is becoming huge, and thus, the laying of submarine pipelines is increasing. Since 1985, the middle sea oil has built 47 oil and gas fields in different domestic sea areas, and the total amount of submarine pipeline laying is about 3200 km. With the continuous development of new oil fields, the total amount of laying medium-sea oil submarine pipelines will also increase greatly. The submarine pipeline is an oil and gas conveying tool for connecting an oil well with a platform and connecting the platform with a land storage and transportation facility. In order to prevent the submarine pipeline from being damaged, various protection schemes and measures can be adopted in engineering, and the most common construction procedure is to arrange a groove to bury the pipeline. The economic and effective engineering measure not only can prevent the pipeline from being unstable due to the action of water quality point power, but also has the effects of protecting the pipeline from mechanical damage, eliminating or reducing free span, inhibiting the uplift and buckling of the pipeline, increasing the thermal insulation effect of the pipeline and the like.

At present, the demand of ditching operation after laying new marine pipes in China is high, a ditcher is the most key machine for ditching and laying the submarine pipelines, but most of the domestic existing ditchers belong to products eliminated by foreign countries, a plurality of design defects exist, and the working capacity cannot meet the new development demand of the industry. The main problems are: the ditching device is poor in soil breaking effect, pipe ditches are quick in desilting after ditching, conventional ditching operation can be completed only by multiple times of construction, the ditching efficiency is low due to the multiple times of construction, and the difficulty of operation in a complex sea area is high.

SUMMERY OF THE UTILITY MODEL

In order to overcome the furrow opener at the low, poor defect of effect of breaking ground of complicated sea area work efficiency, the utility model provides a submarine pipeline lays furrow opener can dig out dark 1m, and the groove of wide 0.6m adopts machinery and hydraulic shock to penetrate compound form, improves the work efficiency of furrow opener greatly.

The utility model discloses the technical scheme who adopts is: a submarine pipeline laying furrow opener mainly comprises a drill bit, cutter teeth, a rotating shaft, a mechanical sealing element, a nozzle, an outer shell, a push-pull rod inner rod, a push-pull rod outer rod, a fixed rod, a filter screen, a water inlet pipe, a fixed clamping piece, a hose, an inner tube, an inner pump fixed seat, an inner tube partition plate, a waterproof motor, a connecting component, a speed reducer and a water outlet pipe, wherein the furrow opener mainly comprises an inner tube, an outer shell, a drilling part and four power traction modules, the inner tube is welded with the outer shell, the upper surface of the outer shell is provided with the fixed rod and a hydraulic push-pull rod, two ends of the hydraulic push-pull rod are respectively connected with the outer shell and the fixed rod through fixed pins, the working angle and the working depth of a machine can be controlled, one end of the fixed rod is connected with the outer shell through the fixed pin, one end of the fixed rod is positioned on a dragging ship and provides sufficient power for the furrow opener, the inner tube is divided into a front independent sealed cavity and a rear cavity by the inner tube partition plate, the inner pump is arranged in the rear cavity, the inner pump is welded on the inner cylinder through an inner pump fixing seat, the inner pump is provided with a water inlet pipe and a water outlet pipe, the water inlet pipe extends out from the rear side of the fixing rod and is parallel to the fixing rod and extends upwards for a certain distance, the water inlet pipe is fixed with the fixing rod through a fixing clamping piece and is connected with the turning point of the upper surface of the outer shell through a hose, the water inlet pipe can rotate along with the fixing rod within a small range, a filter screen is arranged at the inlet of the water inlet pipe, the water outlet pipe extends forwards to the front wall of the front cavity of the inner cylinder and is distributed in a semicircular shape, nozzles are uniformly arranged on the semicircular water outlet pipe, water discharged from the inner pump is pressurized through a one-way nozzle, partial obstacles can be removed through high-pressure water, a waterproof motor and a speed reducer in the front cavity of the inner cylinder are connected through a connecting component and are clamped in the front cavity of the inner cylinder, a speed reducer rotor extends out from the front end of the inner cylinder and is in butt joint with a rotating shaft, cutter teeth and are driven by the rotating shaft, the cutter teeth base, the cutter teeth are arranged on the cutter teeth, Connecting rod, rake teeth are constituteed, and the sword tooth base passes through the screw fixation on the rotation axis, and the drill bit welding is at the rotation axis foremost, and mechanical seal is located rotation axis and inner tube front chamber junction to establish rubber seal water proof pad around mechanical seal, prevent that the sea water from getting into the inner tube and damaging waterproof motor.

Preferably, the drill bit is of a special structure, and the top of the drill bit is branched into three small drill bits;

preferably, the cutter teeth are regularly distributed on the rotating shaft and change in diameter from front to back, and the section of the connecting rod is in a regular rhombus shape in the axial direction;

preferably, the front and the back of the outer shell are in a gradually expanding mode, and a buffering edge is arranged at the front wall of the outer shell to reduce working resistance;

preferably, the nozzles are distributed along the circumferential direction at a certain angle to the axis, are aligned with the cutter teeth and the drill bit, and adopt one-way nozzles, when the machine does not operate, the one-way circulation valves in the nozzles are closed, so that the seawater is effectively prevented from flowing backwards;

the utility model discloses a submarine pipeline lays furrow opener, this equipment possesses following beneficial effect:

(1) the special drill bit used by the furrow opener improves the crushing capacity of the furrow opener and greatly improves the excavation efficiency of the submarine pipeline;

(2) the drilling part adopts a mechanical and hydraulic impact composite form, can dig a groove with the depth of 0.8m and the width of 0.6m, has good ditching effect, adopts a multiple waterproof structure as a whole, ensures that the ditcher can safely and stably run in a severe marine environment, and greatly prolongs the service life of the machine.

Drawings

FIG. one is a schematic half-section view of the trench opener for laying submarine pipelines of the present invention;

secondly, the cross section side view of the trench opener for laying the submarine pipeline of the utility model is shown;

FIG. three is a front view of the trench opener for laying submarine pipelines of the utility model;

FIG. four is a schematic view of the drilling part of the pipe laying furrow opener of the utility model;

in the figure: 1. a drill bit; 2. cutter teeth; 3. a rotating shaft; 4. a mechanical seal; 5. a nozzle; 6. an outer housing; 7. an inner rod of the push-pull rod; 8. a push-pull rod outer rod; 9. fixing the rod; 10. a filter screen; 11. a water inlet pipe; 12. fixing the clamping piece; 13. a hose; 14. an inner barrel; 15. an internal pump; 16. an inner pump fixing seat; 17. an inner cylinder partition plate; 18. a waterproof motor; 19. a connecting member; 20. a speed reducer; 21. a water outlet pipe;

Detailed Description

The present invention will be further explained with reference to the accompanying drawings

As shown in the figure, the utility model relates to a submarine pipeline laying furrow opener, which mainly comprises a drill bit 1, a cutter tooth 2, a rotating shaft 3, a mechanical sealing element 4, a nozzle 5, an outer shell 6, a push-pull rod inner rod 7, a push-pull rod outer rod 8, a fixed rod 9, a filter screen 10, a water inlet pipe 11, a fixed clamping element 12, a hose 13, an inner cylinder 14, an inner pump 15, an inner pump fixing seat 16, an inner cylinder baffle 17, a waterproof motor 18, a connecting component 19, a reducer 20 and a water outlet pipe 21, wherein the inner cylinder 14 is divided into a front independent sealing cavity and a rear independent sealing cavity by the inner cylinder baffle 17, the inner pump 15 is welded on the rear cavity of the inner cylinder through the inner pump fixing seat 16, the inner pump water inlet pipe 11 extends from the rear side of the fixed rod and extends upwards for a certain distance, the inlet of the water inlet pipe is provided with the filter screen 10 and is fixed with the fixed rod 9 through the fixed clamping element 12, and the water outlet pipe 21 of the inner pump extends forwards to the front wall of the front cavity, the nozzles 5 are evenly arranged on the semi-annular water outlet pipe, a waterproof motor 18 and a speed reducer 20 of the front cavity of the inner cylinder are connected through a connecting component 19, and is clamped in the front cavity of the inner cylinder, a speed reducer rotor extends out of the front end of the inner cylinder and is butted with a rotating shaft 3, a cutter tooth 2 and a drill bit 1 are driven by the rotating shaft 3 to rotate, a cutter tooth base and the rotating shaft are fixed by the cutter tooth 2 through a screw, the drill bit 1 is welded at the foremost end of the rotating shaft, a mechanical sealing element 4 is positioned at the joint of the rotating shaft and the front cavity of the inner cylinder to prevent seawater from entering the inner cylinder to damage a waterproof motor, an inner cylinder 14 is welded with an outer shell 6, the upper surface of the outer shell 6 is provided with a fixed rod 9 and a push-pull rod, the push-pull rod consists of a push-pull rod inner rod 7 and a push-pull rod outer rod 8, the ditching machine is used for adjusting the working angle and the depth of the ditcher, one end of the fixed rod 9 is connected with the outer shell 6 through the fixed pin, and the other end of the fixed rod is connected with the ship body to provide a sufficient power source for the ditcher.

Utilize the utility model discloses carry out the pipe laying ditching operation in stereoplasm soil sand seabed, contain following step:

the ditching device is checked before work, normal operation of a drilling part is guaranteed, overall tightness is checked, the ship body is driven to a specified ditching operation point, the fixed rod is fixed with the ship body, the ditching device is placed to the surface of the sea bed, a power supply is turned on to enable the inner pump and the waterproof motor to start working, the hydraulic push-pull rod is turned on to adjust the angle of the drill bit, the ditching device is downwards inclined to enable the ditching device to gradually go deep into the sea bed, after the drill bit reaches a preset depth, the ditching device is slowly adjusted to be in a horizontal state, and pipe laying grooves meeting the standard are excavated under the effects of fixed rod traction and hydraulic impact.

The utility model discloses the part of creeping into adopts machinery and hydraulic ram to penetrate compound form, can dig out dark 1m, wide 0.6 m's groove, and its special drill bit improves furrow opener crushing ability, improves submarine pipeline excavation efficiency greatly to ditching is effectual, and the furrow opener wholly adopts multiple waterproof construction, guarantees long-term even running, machine long service life under the marine environment that the furrow opener can be abominable.

Claims

1. The utility model provides a submarine pipeline lays furrow opener which characterized in that: comprises a drill bit (1), cutter teeth (2), a rotating shaft (3), a mechanical sealing element (4), a nozzle (5), an outer shell (6), a push-pull rod inner rod (7), a push-pull rod outer rod (8), a fixed rod (9), a filter screen (10), a water inlet pipe (11), a fixed clamping piece (12), a hose (13), an inner cylinder (14), an inner pump (15), an inner pump fixing seat (16), an inner cylinder partition plate (17), a waterproof motor (18), a connecting component (19), a speed reducer (20) and a water outlet pipe (21), wherein the inner cylinder (14) is divided into a front independent sealing cavity and a rear independent sealing cavity by the inner cylinder partition plate (17), the inner pump (15) is arranged in the rear cavity, the inner pump (15) is welded on the inner cylinder through the inner pump fixing seat (16), the inner pump (15) is provided with the water inlet pipe (11) and the water outlet pipe (21), wherein the water inlet pipe (11) extends out from the rear side of the fixed rod (9), parallel to the fixed rod and extending upwards for a certain distance, fixed with the fixed rod through a fixed fastener (12), a filter screen (10) is arranged at the inlet of the water inlet pipe, a water outlet pipe (21) extends forwards to the front wall of a cavity in the front of the inner cylinder, a nozzle (5) is evenly arranged on a semicircular water outlet pipe of the water outlet pipe, partial barriers can be removed after the water pumped out of the inner cylinder is pressurized, a waterproof motor (18) and a speed reducer (20) in the front cavity of the inner cylinder are connected through a connecting component (19), a speed reducer rotor extends out from the front end of the inner cylinder and is in butt joint with a rotating shaft, a cutter tooth (2) and a drill bit (1) are driven by the rotating shaft (3) to rotate, the cutter tooth (2) can break hard soil and sand, the drill bit (1) can reduce the working resistance and provide the direction for the operation of a furrow opener, a mechanical sealing element (4) is positioned at the joint of the rotating shaft (3) and the cavity in the front of the inner cylinder, and prevents seawater from entering the inner cylinder and damaging the waterproof motor, the inner cylinder (14) is welded with the outer shell (6), the upper surface of the outer shell (6) is provided with a fixed rod (9) and a push-pull rod, the push-pull rod consists of a push-pull rod inner rod (7) and a push-pull rod outer rod (8) and is used for adjusting the working angle and the depth of the furrow opener, one end of the fixed rod (9) is connected with the outer shell (6) through a fixed pin, and the other end of the fixed rod is connected with the ship body.

2. A subsea pipeline laying opener according to claim 1, wherein: the drill bit (1) adopts a head-forked structure, and the drill bit is forked into three small drill bits.

3. A subsea pipeline laying opener according to claim 1, wherein: the front and the back of the outer shell (6) are in a gradually expanding type, and the front end face of the outer shell (6) is provided with a resistance reducing edge.

4. A subsea pipeline laying opener according to claim 1, wherein: the nozzle (5) is positioned on the front wall surface of the outer shell (6), is distributed at a certain angle to the axis along the annular direction, and is aligned with the direction of the cutter teeth (2) and the drill bit (1) to spray, so that the ditching resistance is reduced.