CN205640034U - Split type hydraulic submarine pipeline repairing device - Google Patents

Abstract

The utility model provides a split type hydraulic repair device for seabed pipelines, which is applied to the repair operation when the seabed pipelines are severely damaged. The repair device adopts multiple sealing technologies such as conical metal rings, trapezoidal metal rings and metal rings, and realizes rapid repair of submarine pipelines based on the special structure of split symmetrical thick-walled cylinders and hydraulic propulsion systems; The double metal ring sealing technology of the metal ring is organically combined to realize the fixation and sealing between the repair device and the cutting pipe; based on the multiple metal sealing technology of the single tapered metal ring combined with each hexagonal metal ring, the pipe end sealer and the repairer are realized And the fixation and sealing between the repairer, the sliding sealer and the sliding body; the hydraulic propulsion system provides the driving force to ensure that the pipe end sealer, the repairing device and the sliding sealer are pushed along the axial direction of the sliding body to realize the restoration device and cutting The two pipe ends of the pipeline are quickly and automatically connected, so that the repair device has the characteristics of reliable sealing and short repair time.

Description

Split type hydraulic repair subsea pipeline device

technical field

The utility model relates to a device for repairing a seabed pipeline in the field of marine engineering, in particular to a split hydraulic repair device used when the submarine pipeline is severely damaged.

Background technique

Due to the particularity of the underwater operating conditions of the submarine pipeline in the field of ocean engineering, there are risks such as medium corrosion, ship anchoring, geological disasters, and third-party damage in ocean development, which may cause damage to the submarine pipeline. Once the submarine pipeline leaks or Severe damage will not only cause marine water pollution, waste of oil and gas resources, and interruption of offshore production, but also adversely affect the normal production of its downstream and end users.

The specific repair technologies and schemes of submarine pipelines vary according to the damage form and operating water depth. The main repair methods currently adopted can be summarized as underwater repair technology and above-water repair technology. Among them, mechanical plugging and composite reinforcing material plugging are underwater repair technologies, which have the advantages of simple operation and short implementation period, and can be used for pipeline leakage without major mechanical deformation caused by corrosion, base material defects, cracks, etc. , however, it is difficult to achieve effective plugging and repairing when the submarine pipeline is seriously damaged or has a large deformation. The lifting method repair is mainly a kind of underwater repair technology. After cutting the damaged pipe section underwater, the two cut pipe ends are respectively lifted to the welding flange of the above-water operation line, and finally launched into the water to complete the connection. This technology avoids the underwater process. At present, it is widely used in shallow water areas. The disadvantage is that the construction technology of offshore welding is complicated, and the operation risk is high. The lifting and launching operations are easy to cause local buckling and bending of the pipe section. More importantly, the process of this technology is relatively complicated and The repair time is longer. The replacement and repair technology of underwater pipe sections is characterized by a wide range of applications, and can complete the repair of various forms of submarine pipeline damage such as corrosion or fracture. However, the disadvantage is that the production technology of the key spare part, the mechanical connector for repair, has always been in the hands of foreign professional companies. , China has not yet formed the corresponding R&D and production technology capabilities, and its foreign order cycle is relatively long.

Contents of the invention

In order to effectively solve the problem of rapid repair of submarine pipelines and overcome the defects and deficiencies of existing repair technologies and devices, the purpose of this utility model is to provide a split hydraulic repair device suitable for severe damage or large deformation of submarine pipelines . The device for repairing submarine pipelines adopts multiple sealing technologies such as conical metal rings, trapezoidal metal rings, and metal rings, and realizes rapid repair of submarine pipelines based on the special structure of the split symmetrical thick-walled cylinder and the hydraulic propulsion system. It has reliable sealing and repair short-term characteristics.

The technical scheme adopted by the utility model to solve the technical problem is to develop a split type hydraulic repair submarine pipeline device, which is mainly composed of a pipe end sealer, a repairer, a slip sealer, a hydraulic propulsion system and a slippery body. During the repair operation, relying on the driving force provided by the hydraulic propulsion system, the pipe end sealer, the repairer and the sliding sealer are pushed along the axial direction of the sliding body until the inner wall and the outer tapered surface of the outer sealing body of the pipe end sealer are in contact with the pipe end of the cut pipe. Until the prefabricated cone surfaces overlap; then disassemble the hydraulic propulsion system, and quickly tighten each pipe end stud of the pipe end sealer, relying on the clamping force and thrust transmitted between the outer sealing body, the inner sealing body and the repair body, the double cone The shaped metal ring and the trapezoidal metal ring are deformed in turn and form a metal ring seal with the prefabricated ring surface of the cut pipe. Form a metal ring seal between the seals; then tighten the sliding studs of the sliding seal, relying on the thrust and clamping force transmitted by the sliding disc and sliding ring and the repair body, the single tapered metal ring moves axially And gradually fit the outer ring surface of the sliding body and then deform to form a metal ring seal. At the same time, the inner hexagonal metal ring deforms and forms a metal ring seal between the restorer and the sliding sealer, thus realizing repair The fixed connection and sealing between each part of the device and the cutting pipe.

The overall design of the device for repairing submarine pipelines is a fully symmetrical structure of a split cylinder, in which the pipe end sealer, repairer, sliding sealer and hydraulic propulsion system all adopt a left and right split structure, that is, the pipe end sealer, repairer, sliding Both the displacement sealer and the hydraulic propulsion system contain two left and right units with the same structure and size, and the left and right units are symmetrically arranged on both sides of the sliding body, and the sliding body adopts a left and right symmetrical unit. Tube structure.

The device for repairing the submarine pipeline adopts the organic combination of multiple metal sealing technologies such as the tapered metal ring, the trapezoidal metal ring and the metal ring. The cross-section of the trapezoidal metal ring is isosceles trapezoidal. The tapered metal ring includes a double-conical metal ring and a single-conical metal ring. The outer ring surface of the double-conical metal ring adopts a symmetrically arranged double-cone shape. and the cone height are equal, and the outer ring surface of the single-cone metal ring adopts the shape of a single conical surface. The taper of the outer cone surface of the trapezoidal metal ring, double-cone metal ring and single-cone metal ring decreases sequentially while the cone height of the outer cone surface gradually increases, while the single-taper metal ring, rectangular metal ring and double-cone metal ring The metal rings are arranged coaxially on the outer ring surface of the sliding body and the prefabricated ring surface of the cutting pipe from the inside to the outside in the axial direction, and each metal ring is equipped with evenly distributed metal wires inside and wrapped with metal foil piece.

Metal ring sealing technology includes inner hexagonal metal ring and outer hexagonal metal ring, the inner hexagonal metal ring and outer hexagonal metal ring are arranged in layers along the axial direction from inside to outside, each group contains two Two hexagonal metal rings arranged concentrically, wherein the outer hexagonal metal rings include two groups and are placed in parallel between the two groups of metal rings, while the inner hexagonal metal rings have only one group. The cross section of each hexagonal metal ring is a long hexagon, each long hexagon is congruent and the center line of the long section is parallel to the cylinder axis of the repair device, and each hexagonal metal ring They all adopt a thick metal ring body and are wrapped with metal foil on the outside.

The pipe end sealer adopts a split-type thick-walled cylinder structure, and realizes the fixed connection and sealing between the sealing bodies of the pipe end sealer and between the pipe end sealer and the repairer according to the metal ring multiple metal sealing technology, which includes the outer sealing body , inner sealing body, biconical metal ring and outer hexagonal metal ring.

The inner wall of the outer sealing body adopts the annulus of a stepped rotary body, and the outer annulus of the inner wall adopts an inverted conical surface, and the taper and cone height of the outer conical surface of the inner wall of the outer sealing body are the same as those of the prefabricated conical surface of the cut pipe end. and the inner ring surface of the inner wall of the outer sealing body adopts a conical surface. The taper is equal to the taper of the outer conical surface of the biconical metal ring and the cone height is greater than that of the outer conical surface of the biconical metal ring. The outside of the outer ring surface of the outer sealing body is machined with a conical surface, the taper of which is equal to the taper of the inner conical surface of the inner wall of the outer sealing body. Two concentric annular grooves are arranged on the inner end surface of the outer sealing body. The cross section of the annular grooves is an isosceles trapezoid and a group of outer hexagonal metal rings are arranged inside.

The two annular grooves on the outer end surface and the middle end surface of the inner sealing body are the same size and shape as the annular groove of the outer sealing body, and another set of outer hexagonal grooves are arranged in the annular groove on the middle end surface. The metal ring, while the inner end face of the inner seal body adopts a conical face. The outer ring surface of the inner wall of the inner sealing body adopts an inverted conical surface. The gap fit is used to form a friction pair, and the gap fit is used to form a moving pair between the inner cylindrical surface of the inner wall and the prefabricated ring surface of the cutting pipe.

At the same position around the outer sealing body and the inner sealing body, there are pipe end round holes of the same size and quantity drilled in the circumferential direction, and at the same time, pipe end studs are arranged in each pipe end round hole of the outer sealing body and the inner sealing body to realize the pipe end. The coupling between the two halves of the end sealer and the restorer. In addition, the inner tapered surface of the inner wall of the outer sealing body and the inner tapered surface of the inner sealing body are symmetrically arranged along the axial direction, and a double-conical metal ring is arranged in the formed symmetrical tapered ring cavity.

The restorer adopts a thick-walled cylinder structure, and according to the organic combination of the double metal ring sealing technology of the trapezoidal metal ring and the double-cone metal ring of the pipe end sealer, the fixed connection and sealing between the repairing device and the cutting pipe can be realized. The metal sealing technology of the single tapered metal ring and the metal ring realizes the fixed connection and sealing between the restorer and the sliding body and the sliding sealer, which includes the repair body, the trapezoidal metal ring, the backing ring, and the single tapered metal ring , Hexagonal metal ring, pressure sleeve and support.

Both ends of the repairing body are drilled along the circumferential direction with pipe end threaded holes at the same position and number as the round holes at the pipe ends of the outer sealing body and the inner sealing body. The variable section of the outer ring cavity of the inner wall of the repair body forms a clamp and positions the backing ring, and the variable section of the inner ring cavity of the inner wall also forms a clamp and positions the pressure sleeve, while the middle ring cavity of the inner wall is processed with a ring along the circumference There are eight grooves evenly arranged in the direction. Each groove is arranged along the axial direction. At the same time, the two sides of each groove are parallel to each other and the top surface of each groove is on the same cylindrical surface. The inner wall of the body and its grooves are repaired. Each wall is finished.

The outer end surface of the backing ring adopts an inverted conical surface, and has the same taper and taper height as the inner end surface of the inner sealing body. At the same time, it is arranged axially symmetrically with the inner end surface of the inner sealing body and the formed symmetrical conical surface ring cavity is equipped with a trapezoid metal ring.

The outer ring surface of the pressure sleeve adopts a stepped rotary surface and matches the inner wall of the repair body. The outer surface of the inner wall of the pressure sleeve adopts a cylindrical surface while the inner side adopts a conical surface. The conical surface formed by the inner wall of the pressure sleeve is equipped with a single cone. The taper of the metal ring, the taper of the inner wall of the pressure sleeve is equal to the taper of the outer cone of the single-taper metal ring, and its cone height is greater than that of the outer cone of the single-taper metal ring.

The rests are evenly distributed in the middle of the outer ring surface of the restoration body, and are divided into three groups, one of which is located directly above the restoration body, each group of rests contains two single branch rests and the two branch rests are placed in parallel, each The specifications and dimensions of the branch brackets are the same, and each branch bracket is made of square steel plate, and the diameter of the hole in the middle is equal, and they are respectively matched with the outer pins to realize the connection between the repair body and the hydraulic cylinders of the hydraulic propulsion system.

The sliding seal adopts the structure of the combination of the flange and the ring body, and realizes the sealing of the conical sealing ring and the metal ring through the axial pushing and extrusion movement, which includes a sliding disc and a sliding ring.

Sliding round holes of the same size and quantity as the tube end round holes of the outer sealing body and inner sealing body are drilled around the circumference of the sliding disc, and at the same time, sliding studs are arranged in each sliding round hole to realize the sliding seal. The connection with the fixer. Both the inner wall of the slip disc and the outer ring surface of the slip ring adopt stepped rotary surfaces, and the transition between the inner and outer cylindrical surfaces of the inner wall of the slip disc adopts an inverted conical surface.

The outer side of the outer ring surface of the slip ring is finished and the friction pair is formed by a clearance fit with the inner wall of the repair body. At the same time, there are two layered annular grooves arranged on the outer side of the outer ring surface. The cross section is rectangular and filled with grease. In addition, the inner and outer cylindrical surfaces of the outer ring surface of the slip ring and the inverted conical surface at the variable section of the cylindrical surface are respectively precisely matched with the inner wall of the slip disc.

The sliding body provides an axially advancing sliding channel for the pipe end sealer, repairer and sliding sealer, and it includes a sliding body, a sliding key and a support. The inner diameter of the sliding body is equal to the inner diameter of the cutting pipe, and at the same time, the outer ring surface of the sliding body is finished, and the two sides of the outer ring surface are machined with pipe threads.

The sliding key includes two left and right monomers with the same structure and size, and the left and right monomers are symmetrically arranged on both sides of the sliding body. The sliding key adopts a spline structure, and the specification and position of each key correspond to the groove of the restoration body. At the same time, sliding pairs are formed between each key of the sliding key and each wall of the groove of the restoration body. The inner wall of the sliding key is connected to the two side ends of the sliding body through the pipe thread connection, and the outer end surfaces of the sliding key are respectively kept flush with the two side end surfaces of the sliding body.

The bearings are arranged in layers in the middle of the outer ring surface of the sliding body, and are divided into two layers and placed symmetrically. The bearings of each layer are evenly arranged along the circumferential direction, and their positions and numbers correspond to each group of bearings. The specifications and dimensions of each support are the same. At the same time, each support is made of a right-angled trapezoidal steel plate, and its inner surface is processed into a circular arc surface to improve the stress distribution on each support. The side is designed with a U-shaped groove, and the diameters of the openings on the two side walls of the U-shaped groove are equal, and are respectively matched with the inner pins to realize the connection between the sliding body and the hydraulic cylinders of the hydraulic propulsion system.

The device for repairing submarine pipelines includes two sets of independent hydraulic propulsion systems, which are used to provide driving force to realize rapid and automatic docking between the repair device and the two ends of the cut pipeline. The two sets of hydraulic propulsion systems realize the connection between the repairer and the sliding body through the support and the support, and complete the axial advancement and positioning of the pipe end sealer, the repairer and the sliding sealer. Each set of hydraulic propulsion system adopts three independent hydraulic cylinders evenly distributed along the outer ring surface of the sliding body and symmetrically arranged along the middle section of the sliding body, and each hydraulic cylinder is placed along the axial direction of the sliding body. The hydraulic oil of all independent hydraulic cylinders is uniformly supplied by the main oil pump and independently distributed by the multi-way reversing valve, respectively realizing the axial propulsion function of the left and right units of the pipe end sealer, repairer and sliding sealer, and each Automatic synchronous propulsion of each hydraulic cylinder in the hydraulic propulsion system. All independent hydraulic cylinders use the same type of piston cylinder. The cylinder barrel of the hydraulic cylinder is fixed by the outer pin and the restorer, while the piston rod is anchored by the inner pin and the sliding body. At the same time, the inner pin and the outer pin The shaft ends are processed with threaded blind holes and equipped with hexagon head screws for fixing.

The inner diameter of the biconical metal ring in the pipe end sealer, the minimum ring surface diameter of the inner wall of the outer sealing body and the diameter of the inner cylinder of the inner wall of the inner sealing body are equal to the inner diameters of the backing ring and the trapezoidal metal ring in the restorer. At the same time, the diameters of the outer sealing body and the inner sealing body in the pipe end sealer are equal to the outer ring surfaces of the sliding disk in the sliding sealer and the repairing body in the restorer.

The inner diameter of the single tapered metal ring in the restorer, the diameter of the inner wall cylinder of the pressure sleeve, the inner diameter of the slip ring in the slip sealer, and the outer diameter of the slip body in the slip body are all equal to the outer diameter of the cut pipe.

The axial length of the intermediate ring cavity of the repair body in the restorer is greater than the sum of the axial lengths of the prefabricated ring surface of the cut pipe and a single slip key in the sliding body. At the same time, the axial length of the outer annular surface of the sliding body in the sliding body is greater than the two sliding keys and the long side of the support in the sliding body, the outer annular surface of the pressure sleeve in the two left and right restorers, and the left and right sliding joints. The sum of the axial lengths of the outer ring surfaces of the slip rings in the sealer.

The two annular grooves on both sides of the repair body in the restorer and the outer end face of the slip disk in the slip sealer are the same size and shape as the annular grooves of the outer seal body and the inner seal body, and the repair body An inner hexagonal metal ring is disposed in the annular groove of the inner end face.

The cylindrical surface of the inner wall of the pressure sleeve in the restorer and the inner wall of the slip ring in the slip sealer and the outer ring surface of the slip body in the slip body adopt clearance fit to form a moving pair.

The technical effect achieved by the utility model is that the device for repairing submarine pipelines adopts multiple sealing technologies such as conical metal rings, trapezoidal metal rings and metal rings, and is realized according to the special structure of the split-type symmetrical thick-walled cylinder and the hydraulic propulsion system. Rapid repair of submarine pipelines; based on the organic combination of double-cone metal ring and trapezoidal metal ring double metal ring sealing technology, the fixation and sealing between the repair device and the cutting pipeline are realized; the single-cone shape is completed by axially pushing and extruding the sliding sealer Metal ring and inner hexagonal metal ring seal combined with multiple metal sealing technology of outer hexagonal metal ring seal to realize fixed connection between pipe end sealer and restorer, restorer and sliding sealer and sliding body and sealing; the hydraulic propulsion system provides driving force to ensure that the pipe end sealer, repairer and slip sealer can advance along the axial direction of the sliding body to complete the rapid and automatic docking of the repair device and the two pipe ends of the cut pipe, thus making the repair The subsea pipeline installation has the characteristics of reliable sealing and short repair time.

Description of drawings

The utility model will be further described below in conjunction with the accompanying drawings, but the utility model is not limited to the following embodiments.

Fig. 1 is a schematic diagram of a typical structure of a split-type hydraulic repair submarine pipeline device proposed according to the utility model.

Fig. 2 is a schematic structural diagram of a pipe end sealer in a split-type hydraulic repair subsea pipeline device.

Fig. 3 is a schematic structural diagram of a restorer in a split-type hydraulic repair device for subsea pipelines.

Fig. 4 is a cross-sectional view along line A-A of Fig. 3 .

Fig. 5 is a schematic structural diagram of a sliding sealer in a split-type hydraulic repair subsea pipeline device.

Fig. 6 is a schematic structural diagram of a sliding body and a hydraulic cylinder of a hydraulic propulsion system in a split-type hydraulic repair subsea pipeline device.

Fig. 7 is a left side view of Fig. 6 .

Fig. 8 is a schematic diagram of the hydraulic propulsion system in the split-type hydraulic repair subsea pipeline device.

Fig. 9 is a schematic diagram of the automatic docking operation flow of the split-type hydraulic repair subsea pipeline device.

Fig. 10 is a schematic flow chart of the fixed connection and sealing operation of the split-type hydraulic repair subsea pipeline device.

In the figure, 1-pipe end sealer, 2-restorer, 3-hydraulic propulsion system, 4-sliding sealer, 5-sliding body, 6-inner sealing body, 7-biconical metal ring, 8-outer Sealing body, 9-outer hexagonal metal ring, 10-pipe end stud, 11-trapezoidal metal ring, 12-backing ring, 13-support, 14-outer pin, 15-inner hexagonal metal ring, 16 -Single tapered metal ring, 17-press sleeve, 18-repair body, 19-slip plate, 20-slip ring, 21-slip stud, 22-slip key, 23-slip body, 24- Bearing, 25-internal pin shaft, 26-hydraulic cylinder, 27-piston rod, 28-oil inlet, 29-cylinder barrel, 30-oil outlet, 31-multi-way reversing valve.

detailed description

In FIG. 1 , the split-type hydraulic repair subsea pipeline device consists of a pipe end sealer 1 , a repairer 2 , a hydraulic propulsion system 3 , a sliding sealer 4 and a sliding body 5 . Before the repaired submarine pipeline device is assembled, the outer surfaces of the pipe end sealer 1, the repairer 2, the sliding sealer 4 and the main parts of the sliding body 5 are sprayed with paint respectively to prevent seawater corrosion; The slip ring of the sliding sealer 4 should move flexibly along the sliding body of the sliding body 5 without blockage; the sliding key of the sliding body 5 should slide normally along the grooves of the repairing body of the restorer 2 without blockage , and keep the inner walls of the repairer 2 and the sliding body 5 clean; at the same time, check whether the metal rings of the pipe end sealer 1 and the metal rings of the repairer 2 are damaged, and check the pin shafts and thread joints Whether it is firm and free of rust.

In Fig. 1, when the repairing subsea pipeline device is assembled, the pipe end sealer 1 and the repairer 2 are connected through pipe end studs uniformly arranged along the circumferential direction, while the repairer 2 and the sliding sealer 4 are connected. The connection is made by sliding studs evenly arranged in the circumferential direction; the hydraulic propulsion system 3 is fixed to the restorer 2 through the outer pin shaft and anchored to the sliding body 5 through the inner pin shaft to realize the repairer 2 and the sliding body 5 At the same time, the sliding key of the sliding body 5 is closely matched with the restoration body of the restoration device 2.

In Fig. 1, when the repairing submarine pipeline device is in operation, the repairing device axially pushes the pipe end sealer 1, the repairing device 2 and the sliding sealer 4 through the hydraulic propulsion system 3 to quickly and automatically dock with the two pipe ends of the cut pipeline; the repairing device The double-cone metal ring and trapezoidal metal ring formed by tightening the studs at the pipe end are fixedly connected with the cut pipe. At the same time, between the sealing bodies of the pipe end sealer 1 and the repair The multiple outer hexagonal metal ring seals formed by tightening the studs at the pipe end are also fixedly connected between the repairers 2; the repairer 2 is formed by tightening the sliding studs The single tapered metal ring seal and the inner hexagonal metal ring seal are fixedly connected.

In Fig. 2, the inner wall diameters of the inner sealing body 6 and the outer sealing body 8 in the pipe end sealer 1 and the inner diameters of the biconical metal ring 7 and the outer hexagonal metal ring 9 are all based on the prefabricated ring surface of the submarine pipeline after cutting The diameter is adjusted, and the wall thickness of the inner sealing body 6 and the outer sealing body 8 is designed according to the radial thrust generated by the deformation of the biconical metal ring 7; the specifications of the biconical metal ring 7 and the outer hexagonal metal ring 9 are considered comprehensively The type selection is based on factors such as the physical properties and maximum delivery pressure of the oil and gas medium in the submarine pipeline, and the physical properties and pressure of the seawater around the submarine pipeline.

In Fig. 2, the quantity and thread strength of the pipe end studs 10 in the pipe end sealer 1 are based on the clamping force required for the deformation of the biconical metal ring 7 produced by the inner sealing body 6 and the outer sealing body 8, and the inner sealing The thrust force required for the body 6 to squeeze the trapezoidal metal ring for deformation and the resultant force of the clamping force required for the deformation of the inner sealing body 6, the outer sealing body 8 and the repair body to clamp the outer hexagonal metal ring 9 to generate deformation are designed.

In Fig. 2, the biconical metal ring 7 in the pipe end sealer 1 is deformed by the clamping of the inner sealing body 6 and the outer sealing body 8 to form a seal, while the outer hexagonal metal ring 9 passes through the inner sealing body respectively. 6 and the outer sealing body 8 and the clamping of the inner sealing body 6 and the repair body are deformed to form a seal.

In Fig. 3 and Fig. 4, the inner wall diameter of the backing ring 12 and the inner diameter of the trapezoidal metal ring 11 in the restorer 2 are adjusted according to the prefabricated annulus diameter of the subsea pipeline after cutting, and the inner wall diameters of the pressure sleeve 17 and the repair body 18 and The inner diameters of the single tapered metal ring 16 and the inner hexagonal metal ring 15 are consistent with the outer diameter of the submarine pipeline to be repaired. Designed for radial thrust. The specifications of the trapezoidal metal ring 11 and the single tapered metal ring 16 are selected according to the properties and maximum delivery pressure of the oil and gas medium in the submarine pipeline, while the specifications of the inner hexagonal metal ring 15 are designed according to the physical properties and pressure of the seawater around the submarine pipeline .

In Figure 3 and Figure 4, the trapezoidal metal ring 11 in the restorer 2 is deformed by the co-extrusion of the inner sealing body 6 and the backing ring 12 to form a seal, and the single tapered metal ring 16 passes through the pressure sleeve 17 and the sliding sealer 4 The co-extrusion of the slip ring produces deformation to form a seal, while the inner hexagonal metal ring 15 is deformed to form a seal by clamping the repair body 18 and the slip disc of the slip sealer 4 . Moreover, the repair body 18 is connected with each hydraulic cylinder of the hydraulic propulsion system 3 through the cooperation of the support bracket 13 on the outer ring surface and the outer pin shaft 14 .

In Fig. 5, the diameter of the inner wall of the slip ring 20 in the slip sealer 4 is adjusted according to the outer diameter of the subsea pipeline to be repaired, and the number and thread strength of the slip studs 21 are based on the extrusion ring 20 extruding a single tapered metal The resultant force of the thrust force required for the deformation of the ring 16 and the clamping force required for the deformation of the inner hexagonal metal ring 15 to be clamped by the repair body 18 and the sliding disc 19 is designed.

In Fig. 6 and Fig. 7, the diameter of the outer ring surface of the sliding body 23 in the sliding body 5 is adjusted according to the outer diameter of the submarine pipeline to be repaired, and the diameter of the outer ring surface of the sliding key 22 is the same as the diameter of the inner wall of the repairing body 18. Keep consistent, while the wall thickness of the sliding body 23 is consistent with the wall thickness of the subsea pipeline to be repaired. Moreover, the sliding body 23 is coupled with the hydraulic cylinders 26 of the hydraulic propulsion system 3 through the cooperation of the support 24 on the outer ring surface and the inner pin shaft 25 .

In Fig. 8, the hydraulic propulsion system 3 is equipped with six independent hydraulic cylinders 26 of the same type. The six hydraulic cylinders 26 are divided into two sets of systems and are supplied with hydraulic oil through the same main oil pump. 2 is anchored and its piston rod 27 is hinged with the sliding body 5, and the hydraulic oil distributed by the multi-way reversing valve 31 is passed through or returned to oil through the oil inlet 28 and the oil outlet 30 of the six hydraulic cylinders 26 Further, the bidirectional movement function of the piston rod 27 is realized.

In Fig. 9, the automatic docking operation process of the repairing submarine pipeline device is that after the repairing device and the cutting pipeline are centered, the multi-way reversing valve 31 of the hydraulic propulsion system 3 distributes hydraulic oil, and the oil inlet 28 of the cylinder 29 carries out Through the oil, the piston rod 27 provides the driving force and transmits it to the repair body 18 and the sliding body 23 respectively through the support bracket 13 and the outer pin shaft 14 and the support 24 and the inner pin shaft 25, combining the sliding key 22 and the groove of the repair body 18 Between the sliding pairs, the hydraulic propulsion system 3 drives the components of the pipe end sealer 1, repairer 2 and sliding sealer 4 to advance axially along the sliding body 23 until the inner wall and outer tapered surface of the outer sealing body 8 Until the prefabricated tapered surface of the pipe end of the cutting pipe coincides, the oil outlet 30 of the cylinder 29 returns oil, the piston rod 27 is unloaded and each hydraulic cylinder 26 is disassembled, thereby completing the fast and automatic docking of the repair device and the two pipe ends of the cutting pipe.

In Fig. 10, the fixed connection and sealing operation process of the repaired submarine pipeline device is as follows: firstly, each pipe end stud 10 in the pipe end sealer 1 is quickly tightened, and the inner sealing body 6, the repairing body 18 and the backing ring 12 are sequentially moved toward Move axially in the direction of the outer sealing body 8 and gradually squeeze the biconical metal ring 7, the trapezoidal metal ring 11 and the outer hexagonal metal ring 9, relying on the outer sealing body 8, the inner sealing body 6 and the repair body 18 The transmitted clamping force and thrust, the biconical metal ring 7 and the trapezoidal metal ring 11 are sequentially deformed and form a metal ring seal with the prefabricated ring surface of the cut pipe, and at the same time, the outer hexagonal metal ring 9 is deformed and connected with the pipe. Metal ring seals are formed between the sealing bodies of the end sealer 1 and between the pipe end sealer 1 and the restorer 2 . Next, tighten the sliding studs 21 of the sliding sealer 4, the sliding disk 19 and the sliding ring 20 move axially toward the repair body 18 and gradually squeeze the single tapered metal ring 16 and the inner hexagon Relying on the thrust and clamping force transmitted by the slip disc 19, the slip ring 20 and the repair body 18, the single tapered metal ring 16 moves axially and gradually fits the outer ring surface of the slip body 23 Afterwards, it deforms to form a metal ring seal. At the same time, the inner hexagonal metal ring 15 deforms and forms a metal ring seal between the restorer 2 and the sliding sealer 4, thereby completing the parts of the repair device and their connection with the cutting machine. Fixed connection and sealing between pipes.

The above-mentioned embodiments are only used to illustrate the utility model, wherein the structure and connection mode of each component can be changed, and any equivalent transformation and improvement carried out on the basis of the technical solution of the utility model should not be excluded. Outside the scope of protection of the present utility model.

Claims (10)

1. A split-type hydraulic repair submarine pipeline device, which is mainly composed of a pipe end sealer, a repairer, a sliding sealer, a hydraulic propulsion system and a sliding body, and its overall design is a split-type cylinder with a fully symmetrical structure. The end sealer, repairer, sliding sealer and hydraulic propulsion system all adopt left and right split structures, while the sliding body adopts a left-right symmetrical single-tube structure; meanwhile, the device for repairing submarine pipelines adopts conical metal rings and trapezoidal metal Ring and metal ring and other multiple sealing technologies, and based on the special structure of the split symmetrical thick-walled cylinder and the hydraulic propulsion system to achieve rapid repair of submarine pipelines, it is characterized in that: A pipe end sealer; the pipe end sealer adopts a split-type thick-walled cylinder structure, the inner wall of the outer sealing body adopts the annular surface of a stepped rotary body, and two concentric arrangements are arranged on the inner end surface of the outer sealing body An annular groove, the cross section of which is an isosceles trapezoid and a set of outer hexagonal metal rings are arranged in it, and another set of outer hexagonal metal rings are arranged in the annular groove on the middle end surface of the inner sealing body; The inner conical surface of the inner wall of the outer sealing body and the inner conical surface of the inner sealing body are symmetrically arranged along the axial direction, and a biconical metal ring is arranged in the formed symmetrical conical surface ring cavity; A prosthetic device; the prosthetic device adopts a thick-walled cylinder structure, and the variable section of the ring cavity outside the inner wall of the repair body forms a hoop and positions the backing ring, and the variable section of the inner wall of the inner wall of the prosthetic body also forms a hoop and positions it The middle ring cavity of the inner wall is processed with grooves uniformly arranged in the circumferential direction, and each groove is arranged in the axial direction; the outer end surface of the backing ring and the inner end surface of the inner sealing body are arranged symmetrically in the axial direction and formed The trapezoidal metal ring is arranged in the symmetrical tapered ring cavity; the outer ring surface of the pressure sleeve adopts a stepped rotary surface and matches the inner wall of the repair body, and a single tapered metal ring is arranged in the tapered ring cavity formed by the inner wall of the pressure sleeve; The supports are evenly distributed in the middle of the outer ring surface of the repair body, each group of supports contains two single branch supports and the two branch supports are placed in parallel; A sliding sealer; the sliding sealer adopts the combination structure of the flange plate and the ring body, and realizes the sealing of the conical sealing ring and the metal ring through the axial pushing and extrusion movement, and the inner wall of the sliding plate and the sliding plate The outer ring surface of the shift ring adopts a stepped rotary surface; two annular grooves arranged in layers are arranged on the outer side of the outer ring surface of the slip ring, and at the same time, the inner and outer cylindrical surfaces of the outer ring surface of the slip ring and the The inverted conical surface is precisely matched with the inner wall of the slip plate; A sliding body; the sliding body provides an axially advancing sliding channel for the pipe end sealer, repairer and sliding sealer, and the inner diameter of the sliding body is equal to the inner diameter of the cutting pipe; the sliding key contains two left and right The single body with the same structure, specification and size has two left and right monomers symmetrically arranged on both sides of the sliding body. The seats are arranged in layers in the middle of the outer ring surface of the sliding body. They are divided into two layers and placed symmetrically. Each seat is made of a right-angled trapezoidal steel plate. With U-shaped groove; A hydraulic propulsion system; the hydraulic propulsion system is used to provide driving force to realize the rapid and automatic docking of the repair device and the two pipe ends of the cut pipeline. The repair submarine pipeline device includes two sets of independent hydraulic propulsion systems, and the two sets of hydraulic propulsion systems are The connection between the restorer and the sliding body is realized through the support and the support, and the axial advancement and positioning of the pipe end sealer, the repairer and the sliding sealer are completed; each set of hydraulic propulsion system adopts a Three independent hydraulic cylinders evenly distributed on the ring surface are arranged symmetrically along the middle section of the sliding body, and each hydraulic cylinder is placed axially along the sliding body. 2. The split-type hydraulic repair submarine pipeline device according to claim 1, characterized in that: said pipe end sealer, restorer, slip sealer and hydraulic propulsion system all have two left and right structures with the same specifications and dimensions , and its left and right monomers are symmetrically arranged on both sides of the sliding body; The cross-section of the trapezoidal metal ring is isosceles trapezoidal, the tapered metal ring includes a double-cone metal ring and a single-cone metal ring, and the outer ring surface of the double-cone metal ring adopts a symmetrically arranged double-cone shape. The taper and cone height are equal, while the outer ring surface of the single-tapered metal ring adopts the shape of a single-conical surface; The cone height of the conical surface increases gradually. At the same time, the single-cone metal ring, rectangular metal ring and double-cone metal ring are respectively coaxially arranged on the outer ring surface of the sliding body and the cutting pipe from the inside to the outside along the axial direction. prefabricated torus; The metal ring sealing technology of the split-type hydraulic repair submarine pipeline device includes an inner hexagonal metal ring and an outer hexagonal metal ring, and the inner hexagonal metal ring and the outer hexagonal metal ring form a group along the axial direction from the inside to the The outer layers are arranged, and each group contains two hexagonal metal rings arranged concentrically, of which the outer hexagonal metal rings contain two groups and are placed in parallel between the two groups of metal rings, while the inner hexagonal metal rings There is only one set; the cross sections of each hexagonal metal ring are long hexagons, the long hexagons are all congruent, and the center lines of the long cross sections are all parallel to the cylinder axis of the repairing device. 3. The split-type hydraulic repair submarine pipeline device according to claim 1, characterized in that: the pipe end sealer realizes the repair between the sealing bodies of the pipe end sealer and the pipe end sealer according to the multiple metal sealing technology of the metal ring. Fixed connection and sealing between devices; The inner side of the outer annular surface of the inner sealing body and the inner wall of the repairing body adopt a clearance fit to form a friction pair, and at the same time, the inner cylindrical surface of the inner wall of the inner sealing body and the prefabricated annulus of the cutting pipeline adopt a clearance fit to form a moving pair; The outer sealing body and the inner sealing body are drilled with the same size and number of pipe end circular holes along the circumferential direction at the same position around the outer sealing body. 4. The split type hydraulic repair submarine pipeline device according to claim 1 or 3, characterized in that: the outer ring surface of the inner wall of the outer sealing body adopts an inverted conical surface, and the taper of the outer tapered surface of the inner wall of the outer sealing body and the cone The height is equal to the taper and cone height of the prefabricated cone surface of the cutting pipe end; while the inner ring surface of the inner wall of the outer sealing body adopts a conical surface, and the taper and cone height of the inner cone surface of the inner wall of the outer sealing body are larger than the prefabricated cone of the cutting pipe end. The taper and cone height of the surface, and the taper of the inner cone surface of the inner wall is equal to the taper of the outer cone surface of the double-cone metal ring, and its cone height is greater than the cone height of the outer cone surface of the double-cone metal ring; The outside of the outer ring surface of the outer sealing body is machined with a conical surface, the taper of which is equal to the taper of the inner conical surface of the inner wall of the outer sealing body; The two annular grooves set on the outer end surface and the middle end surface of the inner sealing body are the same size and shape as the annular groove of the outer sealing body, while the inner end surface adopts a conical surface; The annulus adopts an inverted conical surface, and the conical surface of the inner wall of the inner sealing body and the inner conical surface of the inner wall of the outer sealing body have the same taper and cone height. 5. The split-type hydraulic repair submarine pipeline device according to claim 1, characterized in that: the restorer implements the repair based on the organic combination of its trapezoidal metal ring and the dual-cone metal ring sealing technology of the pipe end sealer. The fixed connection and sealing between the device and the cutting pipeline, and the fixed connection and sealing between the restoration device, the sliding body and the sliding sealer are realized based on the metal sealing technology of the restoration device single-tapered metal ring and the metal ring; The two ends of the repair body are drilled along the circumferential direction with pipe end threaded holes at the same position and number as the pipe end round holes of the outer seal body and the inner seal body. The top surfaces of the grooves are all on the same cylindrical surface, and the inner wall of the repair body and the walls of the grooves are all finished; The outer end surface of the backing ring adopts an inverted conical surface, and the taper and cone height of the inner end surface of the inner sealing body are the same; The outer side of the inner wall of the pressure sleeve adopts a cylindrical surface while the inner side adopts a conical surface. The taper of the inner wall of the pressure sleeve is equal to that of the outer cone surface of the single-cone metal ring, and its cone height is greater than that of the outer cone of the single-taper metal ring. Cone height of face; The supports of the restoration device are divided into three groups, one of which is located directly above the restoration body; the specifications and dimensions of each branch support are the same, and each branch support is made of a square steel plate with a hole in the middle The diameters are equal, and they cooperate with the outer pins respectively to realize the connection between the repair body and the hydraulic cylinders of the hydraulic propulsion system. 6. The split-type hydraulic repair submarine pipeline device according to claim 1, characterized in that: the slip sealer includes a slip disc and a slip ring, and the periphery of the slip disc is drilled with an outer sealing body along the circumferential direction. Sliding round holes with the same size and quantity as the round hole at the pipe end of the inner seal body, and the transition between the inner and outer cylindrical surfaces of the inner wall of the sliding disc is made of an inverted conical surface; The outside of the outer ring surface of the slip ring is finished and is fitted with a clearance fit with the inner wall of the repair body to form a friction pair. At the same time, the cross-section of each layer of annular grooves on the outside of the outer ring surface is rectangular and filled with grease . 7. The split-type hydraulic repair submarine pipeline device according to claim 1, wherein the sliding body includes a sliding body, a sliding key and a support, and the outer ring surface of the sliding body is finished, and Both sides of the outer ring surface are machined with pipe threads; Sliding pairs are formed between each key of the sliding key and each wall of the repair body groove, the inner wall of the sliding key is connected to the two sides of the sliding body through pipe thread connection, and the outer end surface of the sliding key Keep flush with the end faces on both sides of the sliding body; The bearings are arranged in layers and each layer of bearings is evenly arranged along the circumferential direction, and its position and quantity correspond to each group of bearings; the specifications and dimensions of each bearing are the same, and at the same time, the short sides of each bearing The diameters of the openings on the two side walls of the U-shaped groove are equal, and they are respectively matched with the inner pins to realize the connection between the sliding body and the hydraulic cylinders of the hydraulic propulsion system. 8. The split-type hydraulic repair submarine pipeline device according to claim 1, characterized in that: the hydraulic oil of all independent hydraulic cylinders of the hydraulic propulsion system is uniformly supplied by the main oil pump and independently distributed through the multi-way reversing valve, Respectively realize the axial propulsion function of the left and right units of the pipe end sealer, repairer and slip sealer, and the automatic synchronous propulsion of each hydraulic cylinder in each hydraulic propulsion system; All independent hydraulic cylinders of the hydraulic propulsion system adopt the same type of piston cylinder, the cylinder barrel of the hydraulic cylinder is fixed by the outer pin and the restorer, and the piston rod is anchored by the inner pin and the sliding body, and at the same time Both the shaft ends of the inner pin shaft and the outer pin shaft are processed with threaded blind holes and are fixed with hexagon head screws. 9. The split-type hydraulic repair submarine pipeline device according to claim 1, characterized in that: the inner diameter of the biconical metal ring in the pipe end sealer, the minimum annulus diameter of the inner wall of the outer sealing body, and the inner wall of the inner sealing body The diameter of the inner cylinder is equal to the inner diameter of the backing ring and the trapezoidal metal ring in the restorer; The diameters of the outer sealing body and the inner sealing body in the pipe end sealer are equal to the outer ring surface diameters of the slip disc in the slip sealer and the repair body in the restorer; The inner diameter of the single tapered metal ring in the restorer, the diameter of the inner wall cylinder of the pressure sleeve, the inner diameter of the slip ring in the slip sealer, and the outer diameter of the slip body in the slip body are all equal to the outer diameter of the cut pipe. 10. The split-type hydraulic repair submarine pipeline device according to claim 1, characterized in that: the axial length of the middle annular cavity of the repair body in the restorer is larger than the prefabricated annular surface of the cut pipeline and the single slip key in the slip body The sum of the axial lengths of The axial length of the outer annular surface of the sliding body in the sliding body is greater than the two sliding keys and the long side of the support in the sliding body, the outer annular surface of the pressure sleeve in the left and right restorers, and the left and right sliding parts. The total axial length of the outer ring surface of the slip ring in the sealer; The two annular grooves on both sides of the restoration body in the restorer and the outer end surface of the slip plate in the slip sealer are the same in size and shape as the annular grooves of the outer sealing body and the inner sealing body, and Repair the internal hexagonal metal ring in the annular groove on the inner end face of the body; The cylindrical surface of the inner wall of the pressure sleeve in the restorer and the inner wall of the slip ring in the slip sealer and the outer ring surface of the slip body in the slip body adopt clearance fit to form a moving pair.