CN205592566U - Deviation-adjustable type submarine pipeline quick repairing and connecting device - Google Patents

Abstract

The utility model provides an adjustable and deflected quick repair connection device for a seabed pipeline, which is applied to the repair and connection operation of subsea pipeline replacement under water. The connecting device adopts the organic combination of various sealing technologies such as metal and non-metal to ensure the sealing between the connecting device and the pipeline; The eccentric adjustment of the eccentricity adjustment, and the seal between the connecting device and the newly replaced pipe is realized by using the ○-shaped sealing ring seal and the metal ring seal; The prefabricated annulus of the pipeline and the seal between the propulsion body and the main sealer; the positioner completes the automatic positioning of the connecting device according to the locking mechanism, and the auxiliary sealing box adopts packing seal and ○-shaped sealing ring to realize the connection between the connecting device and the original annulus of the cut pipeline The fixing and sealing of the connecting device has the characteristics of short repair time and low working intensity.

Description

Adjustable deflection subsea pipeline quick repair connection device

technical field

The utility model relates to a quick-repair connecting device used when a submarine pipeline in the field of marine engineering leaks or is damaged, in particular to an adjustable offset quick-repair connecting device with eccentricity when the submarine pipeline is replaced underwater.

Background technique

The submarine pipeline plays an important role in the oil and gas production in the field of offshore engineering. It connects offshore platforms and platforms, offshore platforms and land terminals, and offshore platforms and FPSOs (floating production storage and offloading units) into an organic whole. Oil and gas well production fluid, qualified crude oil, associated gas and other oil and gas media are exported, chemical agent delivery and water injection are important production tasks. Due to the particularity of the operating environment of the submarine pipeline, there are actual conditions such as high risk and high failure probability. Once a leak occurs, it will not only cause marine environmental pollution, waste of oil and gas resources, and interruption of oil field production, but will also affect the downstream and end users. Normal production and life are adversely affected.

According to the specific damage form of submarine pipelines, three main methods can be adopted at present: pipe clamping, composite material reinforcement and underwater pipe section replacement. Short, it can be used for pipeline leakage caused by corrosion, base material defects, cracks and other reasons, but once the submarine pipeline is severely damaged or deformed, it is difficult to achieve effective plugging and repair. Composite material reinforcement repair technology, such as injecting epoxy resin and other materials, this repair technology is easy to cause impact damage to the pipe body of the submarine pipeline, and the injection equipment itself is complicated and huge, and the on-site material production and underwater operation process are complicated, which is not conducive to the submarine pipeline. Quick fix for plumbing. The underwater pipe section replacement and repair technology 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, but 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 research and development and production technology capabilities, and its foreign order cycle is 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 equipment, the purpose of this utility model is to provide a quick repair connection device suitable for underwater replacement of pipe sections when submarine pipelines leak or are damaged . The quick repair connection device adopts the organic combination of various sealing technologies such as metal and non-metal to ensure the fixation and sealing between the connection device and the pipeline, and realizes the repair operation according to the special structure of the spherical adjustable offset type and the locking mechanism of the positioner The eccentric adjustment between mid-submarine pipelines and the automatic positioning of the connecting device have the characteristics of simple operation, short repair time and low work intensity.

The technical scheme adopted by the utility model to solve the technical problem is to develop an adjustable deflection type submarine pipeline quick repair connection device, which consists of a deflection adjuster, a propulsion body, a main sealer, a positioner and an auxiliary seal box from top to bottom. composition. The deviation adjuster is connected with the newly replaced subsea pipeline, while the main sealer, positioner and auxiliary sealing box are fixed with the cut pipe end. During the repair work, the quick repair connection device first passes through the deviation adjustment body of the deviation adjuster It is welded and prefabricated with the newly replaced submarine pipeline, and then hoisted into the water and connected with the cut submarine pipeline end underwater; then through the spherical fit between the deflection adjuster and the deflection adjuster seat and the spherical gaskets The combined action of the newly replaced pipe and the cut pipe completes the eccentric adjustment, and quickly tightens the adjustment bolts, relying on the clamping pressure transmitted by the deviation adjustment body, the upper ○-shaped sealing ring and the upper hexagonal metal ring are deformed And form a ○-shaped sealing ring seal and a metal ring seal; then move the entire quick repair connection device axially along the pipe, and wait for the lock pin in the locking mechanism of the locator to slide into the prefabricated annular groove of the cutting pipe to complete the connection device in cutting the pipe Then tighten the clamping studs of the positioner, relying on the thrust transmitted by the positioning body, the trapezoidal metal ring moves axially and gradually fits with the prefabricated ring surface of the cut pipe to deform, forming a trapezoidal metal ring seal; Then tighten the propulsion studs on the propelling body, extrude the rectangular metal ring, the conical metal ring and the lower hexagonal metal ring in turn and deform them to form a metal ring seal and a metal ring seal; finally tighten the auxiliary seal Each adjusting stud of the box squeezes the packing through the pressure sleeve and deforms to form a packing seal, and finally realizes the connection between the newly replaced pipe and the cut pipe.

The overall design of the quick repair connection device is a thick-walled cylindrical rotary structure, and the materials of its main components are consistent with those of the newly replaced and cut pipes. Various sealing technologies of non-metallic sealing such as sealing and packing sealing are organically combined to achieve the best sealing effect by learning from each other. Among them, the metal ring sealing technology includes rectangular metal rings, tapered metal rings and trapezoidal metal rings. The diameter of the inner surface is larger than the diameter of the prefabricated annulus of the cutting pipe. There are uniformly distributed metal wires inside each metal ring and wrapped with metal foil on the outside. The material of each metal ring body is made of metal with high strength and strong temperature resistance. , the material of the metal wire is Monel alloy, and the material of the metal foil is the same as that of the submarine pipeline.

The metal ring sealing technology includes an upper hexagonal metal ring and a lower hexagonal metal ring. The upper hexagonal metal ring contains two hexagonal metal rings arranged in parallel up and down, while the lower hexagonal metal ring has only one The upper hexagonal metal rings are placed concentrically, the cross-section of each metal ring is long hexagonal, the center line of the long cross-section of the lower hexagonal metal ring is parallel to the axis of the submarine pipeline, and the upper hexagonal metal The center line of each elongated section of the ring intersects with the axis of the submarine pipeline at the same point; each metal ring adopts a thick metal ring body, and the material of the metal ring body is made of metal with high strength and strong temperature resistance. The exterior is wrapped with metal foil, and the material of the metal foil is the same as that of the submarine pipeline.

The sealing technology of ○-shaped sealing ring includes the upper ○-shaped sealing ring and the lower ○-shaped sealing ring. The material of each ○-shaped sealing ring is made of corrosion-resistant and high-temperature resistant rubber; the packing of the packing sealing technology adopts annular packing with a rectangular cross-section. The packing is woven from carbon fibers pre-impregnated with PTFE emulsion.

The deviation adjuster realizes the eccentric adjustment between the submarine pipelines based on the spherical fit between the deviation adjustment body and the deviation adjustment seat and the joint action of each spherical gasket, and uses an upper ○-shaped sealing ring and an upper hexagonal metal ring to form a ○-shaped seal Ring seal and metal ring seal to realize the seal between the connecting device and the newly replaced pipe, which includes the deviation adjusting body, the deviation adjusting seat, the upper ○-shaped sealing ring, the upper hexagonal metal ring and the spherical gasket. The deviation adjustment body prefabricates the quick repair connection device and the new replacement pipe through welding. It adopts a structure combining a cylindrical cylinder and a spherical cylinder. The wall thickness of the upper cylindrical cylinder of the deviation adjustment body is the same as that of the new replacement pipe and cutting The wall thickness of the pipe is the same, and the diameters of the small end circles of the inner spherical surface and the outer spherical surface of the lower spherical cylinder are respectively equal to the inner diameter and outer diameter of the newly replaced pipe and the cut pipe, and at the same time, the inner and outer spherical surfaces of the spherical cylinder of the deflector are concentric and The center of the spherical surface is located on the axis of the deflector, and the outer spherical surface of the spherical cylinder is treated with anticorrosion and painting.

The inner surface of the body of the deviation adjustment seat adopts a cylindrical surface, and the diameter of the inner surface of the body is equal to the inner diameter of the newly replaced pipe, while the outer ring surface of the body adopts a spherical surface, which is the same as the inner spherical surface of the spherical cylinder of the deviation adjustment body. Carry out precision grinding treatment, and the two spherical surfaces are always kept concentric to form a spherical fit. The axial length of the spherical joint belt between the offset adjustment body and the offset adjustment seat must be greater than one-half of the height of the spherical surface of the offset adjustment seat to ensure that both Higher tightness between. The spherical surface of the offset adjustment seat is provided with annular grooves arranged in layers from top to bottom. There are three layers in total. Both are concentric with the inner and outer spherical surfaces of the deviation adjustment seat and the center of the spherical surface of the deviation adjustment seat. The cross-sections of the two layers of annular grooves on the deviation adjustment seat are the same and both adopt the shape of a combination of rectangle and isosceles trapezoid. Circular metal ring, while the cross-section of the annular groove on the bottom layer of the offset adjustment seat adopts a rectangle, and an upper ○-shaped sealing ring is arranged in it.

The lower ends of the deviation adjusting body and the deviation adjusting seat are equipped with disc flanges, and the deviation adjusting screw holes of the same size are processed around the disc flange, and the lower part of the deviation adjusting screw hole of the deviation adjusting body and the deviation adjusting screw of the deviation adjusting seat The upper part of the hole is designed with a conical hole wall, and each deviation adjustment bolt adopts a spherical gasket, and is respectively placed in the groove of the upper part of the deviation adjustment screw hole of the deviation adjustment body and the lower part of the deviation adjustment screw hole of the deviation adjustment seat to complete The connection between the adjustment body and the adjustment seat. Therefore, when eccentricity occurs between the newly replaced pipe and the cut pipe, by adjusting the spherical gaskets of each deviation adjusting bolt, and relying on the lateral force between the deviation adjusting body and the deviation adjusting seat and their spherical cooperation, the seabed can be reached. The purpose of pipe adjustment eccentricity.

The propulsion body is used to achieve axial propulsion and squeeze the metal rings and metal rings of the main seal. The upper end surface of the propulsion body is connected with the disc-shaped flange of the deflection adjuster seat by welding, and the middle part of the propulsion body is also provided with a disc-shaped flange, and the connection between the propulsion body and the main sealer is realized through the propulsion stud , and the lower end surface of the disc-shaped flange of the propelling body is provided with an annular groove, and the cross-section of the annular groove is isosceles trapezoidal. The inner surface of the propelling body adopts a stepped rotary surface structure, the diameter of the upper cylindrical surface of the inner surface is equal to the inner diameter of the newly replaced pipe, and the diameter of the lower cylindrical surface of the inner surface is equal to the diameter of the prefabricated annulus of the cut pipe. The lower part of the annular surface of the propelling body is processed with two layers of annular grooves arranged in layers. The cross-section of the annular grooves is rectangular and filled with lubricating oil. The lower part of the inner and outer annular surfaces of the propulsion body are finished, and the upper part of the outer annular surface is treated with anticorrosion and painting. In addition, the lower part of the outer annular surface of the propulsion body is transitionally fitted with the inner wall of the main seal body and with the thrust ring of the main sealer. The inner wall is clearance fit, and the lower part of the inner surface of the propulsion body is clearance fit with the prefabricated annulus of the cutting pipe, so that a friction pair is formed between the propulsion body and the main sealing body, and a moving pair is formed between the thrust ring of the main sealer and the cutting pipe.

The main sealer adopts trapezoidal metal ring, rectangular metal ring and tapered metal ring to form a metal ring seal to realize the fixation and sealing between the connecting device and the prefabricated ring surface of the cut pipe, and at the same time form a metal ring seal through the lower hexagonal metal ring, And the sealing between the propulsion body and the main sealer is realized. The main sealer mainly includes the main seal body, thrust ring, bushing, trapezoidal metal ring, rectangular metal ring, tapered metal ring and lower hexagonal metal ring. The cross-section is rectangular, while the cross-section of the tapered metal ring is a right-angled trapezoid. The upper end surface of the main seal body is processed with an annular groove of the same specification and size as the disc flange of the propulsion body. A lower hexagonal metal ring is arranged in the groove. The upper and lower ends of the main seal body are processed with threaded blind holes uniformly arranged along the circumferential direction, and the middle part is designed with glue injection holes evenly arranged along the circumferential direction. The axis of each glue injection hole is aligned with the axis of the main seal body. Vertical, and the hole wall of the injection hole is connected with the set screw through the internal thread. The inner surface of the main seal body is thinner at the top and thicker at the bottom, and a bushing is placed at the variable section of the inner surface, and the upper and lower ends of the inner surface are finished, while the outer ring surface of the main seal body is treated with anticorrosion and painting.

Both the thrust ring and the bushing adopt a cylindrical barrel, the section of the thrust ring is L-like, and the section of the bushing is wedge-shaped. Both the inner and outer ring surfaces of the thrust ring are finished, and the outer ring surface is transitionally matched with the inner surface of the main sealing body to form a friction pair, while the lower part of the inner surface is matched with the prefabricated ring surface of the cut pipe to form a moving pair. At the same time, a rectangular metal ring is arranged in the upper ring cavity of the thrust ring. The outer ring surface of the bushing is positioned in the cavity of the main sealing body by setting an annular clamp, and a tapered metal ring is arranged in the ring cavity of the bushing, and the middle and upper part of the bushing body is processed with glue injection with the main sealing body A round hole with the same number and size as the holes, the round hole corresponds to the glue injection hole one by one and its axis coincides. The ring body of the tapered metal ring is cut with rectangular slots corresponding to the bushing holes. The slots are parallel to the axis of the bushing, and the width of the slots is greater than the diameter of the bushing hole. The slots are filled with seals. glue. The upper part of the inner surface of the bushing adopts an inverted conical surface. The taper of the inverted conical surface is equal to the taper of the outer conical surface of the conical metal ring and is greater than the equivalent friction angle between the inner wall of the bushing and the conical metal ring. The cone of the inverted conical surface The height is greater than the height of the tapered metal ring, and the lower part of the inner surface of the bushing also cooperates with the clearance of the prefabricated annulus of the cutting pipe to form a moving pair. The lower end surface of the bushing is designed as a conical surface, together with the conical surface on the upper end of the positioning body, it forms an isosceles trapezoidal ring chamber and accommodates the trapezoidal metal ring.

The positioner realizes the automatic positioning of the entire connecting device on the cutting pipe according to its locking mechanism. It includes a positioning body and a locking mechanism. A gasket is used to assist sealing between the positioning body and the main sealing body. The positioning body consists of two parts, the upper cylinder and the lower cylinder, wherein the outer ring surface of the upper cylinder is in transition fit with the inner wall of the main sealing body, and the taper and cone height of the upper end of the cone are the same as the taper and cone of the lower end of the bushing. The same height; the outer ring surface of the lower cylinder of the positioning body is anti-corrosion and painted, and its diameter is the same as the outer diameter of the disc flange of the deviation adjustment body and the deviation adjustment seat, the outer diameter of the disc flange of the propulsion body and the main seal body The diameters of the outer ring surface are all equal; at the same time, there are clamping screw holes arranged in groups around the lower cylinder, each group has three clamping screw holes, and the clamping screw holes are drilled into circular through holes. The post enables the fixation of the locator on the main sealer. The inner surface of the positioning body is in clearance fit with the prefabricated annulus of the cutting pipe, and the lower part of the inner surface realizes the connection between the positioner and the auxiliary sealing box through threads; the middle part of the positioning body is processed with lock holes uniformly arranged along the circumferential direction, and There is a locking mechanism inside, and the lock holes and each group of clamping screw holes on the lower cylinder of the positioning body are arranged alternately in sequence. The axis of each lock hole is perpendicular to the axis of the positioning body, and the hole walls of each lock hole are finished. , and the outermost hole wall is threaded.

The locking mechanism realizes the fast locking function of the connecting device. It is composed of a lock pin, a spring and a cover. Both the lock pin and the cover adopt a stepped shaft, and the ring surface of the outer cylinder of the cover is threaded to fix the locking mechanism on the On the positioning body, a hexagonal blind hole is processed in the central part to facilitate the disassembly of the cover. The joint of the end faces of the inner cylinder of the cover forms a shaft shoulder; the ring surface of the cylinder of the lock pin and the hole wall of the corresponding positioning body lock hole A moving pair is formed between them, and the inner cylinder of the lock pin is processed with a wedge-shaped groove, and the shoulder at the junction of the end face of the outer cylinder and the shoulder of the cover are co-located and run through the spring inside, thus completing the lock pin. Radial telescopic movement.

The auxiliary sealing box adopts the packing and the lower ○-shaped sealing ring to form the packing seal and the ○-shaped sealing ring to realize the fixing and sealing between the connecting device and the original annulus of the cutting pipe. It includes the auxiliary sealing body, the pressure sleeve, and the lower ○-shaped Seals and packing. The outer ring surface of the auxiliary sealing body is machined with sealing pipe threads, and the surroundings of the lower end surface are drilled with adjusting screw holes uniformly arranged along the circumferential direction, and the axial advancement of the pressure sleeve is realized by adjusting the studs; the auxiliary sealing body The upper chamber is processed with an annular groove. The cross section of the annular groove is rectangular, and a lower ○-shaped sealing ring is arranged inside, while the lower chamber of the auxiliary sealing body is filled with packing, and the wall of the lower chamber is in contact with the outer surface of the gland. A transition fit is used between the ring surfaces to form a friction pair. The outer ring surface of the pressure sleeve is finished, and the diameter of its inner surface is equal to the outer diameter of the cut pipe. The lower end of the pressure sleeve adopts a disc flange, and the diameter of the disc flange is equal to the diameter of the outer ring surface of the auxiliary sealing body .

The technical effect that the utility model can achieve is that the quick repair connection device adopts a variety of sealing technologies such as metal and non-metal to organically combine to ensure the fixation and sealing between the connection device and the pipeline, and it is based on the special structure of the adjustable spherical surface And the locking mechanism of the locator realizes the eccentric adjustment between the submarine pipelines and the automatic positioning of the connecting device in the repair operation; The eccentric adjustment between the sealing ring and the metal ring seal is used to realize the sealing between the connecting device and the newly replaced pipe; the propulsion body is used to achieve axial propulsion and squeeze the metal rings and metal rings of the main seal. The sealer adopts trapezoidal metal ring, rectangular metal ring and tapered metal ring to form a metal ring seal to realize the fixation and sealing between the connecting device and the prefabricated ring surface of the cut pipe, and at the same time realize the contact between the propulsion body and the main sealer through the metal ring seal. Sealing; the positioner completes the automatic positioning of the connecting device on the cutting pipe according to its locking mechanism, and the auxiliary sealing box adopts packing seal and ○-shaped sealing ring to realize the fixing and sealing between the connecting device and the original annulus of the cutting pipe, thus making The quick repair connection device has the characteristics of simple operation, short repair time, low work intensity and the like.

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 an adjustable deflection subsea pipeline quick repair connection device proposed according to the utility model.

Fig. 2 is a schematic diagram of the structure of the deflection adjuster in the quick repair connection device for the adjustable deflection submarine pipeline.

Fig. 3 is a schematic structural diagram of the propelling body in the quick-repair connection device for the adjustable deflection submarine pipeline.

Fig. 4 is a schematic structural diagram of the main sealer in the quick repair connection device of the adjustable deflection submarine pipeline.

Figure 5 is a schematic diagram of the internal components of the main sealer.

Fig. 6 is a schematic diagram of the structure of the positioner and the auxiliary sealing box in the quick repair connection device of the adjustable deflection submarine pipeline.

Fig. 7 is a cross-sectional view along line A-A of Fig. 6 .

Fig. 8 is a schematic diagram of the eccentric adjustment operation flow of the adjustable eccentric quick repair connection device for submarine pipelines.

Fig. 9 is a schematic flow chart of the main sealing operation of the quick repair connection device for the adjustable deflection submarine pipeline.

Fig. 10 is a schematic diagram of the auxiliary sealing operation flow of the quick repair connection device for the adjustable deflection submarine pipeline.

In the figure, 1 - deflection adjuster, 2 - propulsion body, 3 - main sealer, 4 - positioner, 5 - auxiliary sealing box, 6 - deflection adjuster, 7 - upper hexagonal metal ring, 8 - upper ○ type Sealing ring, 9-adjustment bolt, 10-spherical gasket, 11-adjustment seat, 12-propelling stud, 13-lower hexagonal metal ring, 14-rectangular metal ring, 15-thrust ring, 16-cone Shaped metal ring, 17-set screw, 18-bushing, 19-trapezoidal metal ring, 20-main seal body, 21-positioning body, 22-block cover, 23-spring, 24-lock pin, 25-clamping Stud, 26-adjusting stud, 27-pressure sleeve, 28-auxiliary sealing body, 29-packing, 30-lower ○ type sealing ring, 31-locking mechanism.

detailed description

In FIG. 1 , the adjustable deflection-type subsea pipeline quick repair connection device is composed of a deflection adjuster 1 , a propulsion body 2 , a main sealer 3 , a positioner 4 and an auxiliary sealing box 5 . Before the quick repair connection device is assembled, the outer surfaces of the main parts of the deflection adjuster 1, the propulsion body 2, the main sealer 3 and the positioner 4 are respectively subjected to anti-corrosion and painting treatment; the spherical joint of the deflection adjuster 1 should rotate flexibly in any direction And there is no blockage, the propulsion body 2 and the main sealer 3, the positioner 4 and the main sealer 3, and the auxiliary sealing box 5 gland and the auxiliary sealing body can move flexibly, and the locking mechanism of the positioner 4 can slide normally. And keep the cavity of the main sealer 3, positioner 4 and auxiliary seal box 5 clean; at the same time, check whether there are any defects and damages in the metal rings, metal rings, ○-shaped sealing rings and packing, and check whether the threaded joints are firm and secure. There is no rust.

In Fig. 1, when the quick repair connection device is assembled, the deviation adjuster 1 and the newly replaced pipeline are connected through the welding of the deviation adjustment body, and the propulsion body 2 is fixed on the deviation adjustment seat of the deviation adjuster 1 by welding. The body 2 and the main sealer 3 are connected by a push stud, while the main sealer 3 and the locator 4 are connected by a clamping stud, and the auxiliary sealing box 5 is positioned on the locator by a sealing pipe thread 4 on.

In Figure 1, when the quick repair connection device is in operation, the submarine pipeline is eccentrically adjusted by the deflection adjuster 1, and the newly replaced pipeline and the connection device are sealed by the ○-shaped sealing ring and the metal ring seal formed by tightening the deflection adjustment bolt. Sealing, the connecting device is positioned on the cutting pipeline through the locking mechanism of the locator 4, and the trapezoidal metal ring formed by tightening the clamping stud of the locator 4 is used to seal and tighten the propelling body between the connecting device and the prefabricated annulus of the cutting pipeline 2 Push the metal ring seal formed by the stud and the metal ring seal to fix and seal, and the packing seal formed by tightening the auxiliary sealing box 5 to adjust the stud is fixed and sealed between the connecting device and the original ring surface of the cutting pipeline.

In Fig. 2, the diameter of the inner surface of the deviation adjusting body 6 and the deviation adjusting seat 11 of the deviation adjusting device 1 is adjusted according to the inner diameter of the submarine pipeline, and at the same time, the wall thickness of the deviation adjusting body 6 cavity is consistent with the wall thickness of the submarine pipeline. The specifications of the upper hexagonal metal ring 7 and the upper ○-shaped sealing ring 8 are selected according to the properties of the oil and gas medium in the submarine pipeline and the maximum delivery pressure, and the number and thread strength of the deviation adjustment bolts 9 are based on the deviation adjustment body 6 and the deviation adjustment seat 11 Design the pressure required to clamp the upper hexagonal metal ring 7 and the upper ○-shaped sealing ring 8 to produce deformation, and finally select the spherical gasket 10 according to the designed specification of the deviation adjustment bolt 9 . The submarine pipeline completes the eccentricity adjustment through the spherical fit between the deviation adjustment body 6 and the deviation adjustment seat 11 and the joint action of each spherical gasket 10. The deviation adjustment body 6 and the deviation adjustment seat 11 are connected by the deviation adjustment bolt 9 and the upper six Edge metal ring 7 and upper ○ type sealing ring 8 realize sealing.

In Fig. 3, the diameter of the inner surface of the propulsion body 2 is adjusted according to the inner diameter and outer diameter of the subsea pipeline, and the number and thread strength of the propulsion studs 12 are based on the thrust required to squeeze the metal ring of the main seal 3 and the metal ring to produce deformation According to the design, the propulsion body 2 realizes axial propulsion by tightening each propulsion stud 12 .

4 and 5, the lower hexagonal metal ring 13, rectangular metal ring 14, thrust ring 15, tapered metal ring 16, bushing 18, trapezoidal metal ring 19 and main sealing body 20 of the main sealer 3 The diameter of the inner surface is adjusted according to the outer diameter of the submarine pipeline. The wall thickness of the main sealing body 20 is designed according to the radial thrust generated by the deformation of the rectangular metal ring 14, the tapered metal ring 16 and the trapezoidal metal ring 19. The rectangular metal ring 14, The specifications of the conical metal ring 16 and the trapezoidal metal ring 19 are selected according to the properties and maximum delivery pressure of the oil and gas medium in the submarine pipeline, and the specifications of the lower hexagonal metal ring 13 are selected according to the physical properties and pressure of the seawater around the submarine pipeline.

In Fig. 4 and Fig. 5, the lower hexagonal metal ring 13 and the rectangular metal ring 14 of the main sealer 3 are deformed by extrusion of the cylinder part at the lower part of the propelling body 2 to form a seal, while the conical metal ring 16 is formed by The axial thrust transmitted by the thrust ring 15 and the extrusion force of the bushing 18 are deformed and combined with the sealant to form a seal; the glue injection operation is completed on the water line, and the sealant is injected through the injection holes of the main seal body 20 and sealed. Guarantee that it is full of each slit of tapered metal ring 16, screw on each set screw 17 at last.

In Fig. 6 and Fig. 7, the diameter of the inner surface of the positioning body 21 of the positioner 4 is adjusted according to the outer diameter of the submarine pipeline, and the diameter of the outer ring surface of the positioning body 21 is consistent with the diameter of the outer ring surface of the main sealing body 20, The quantity and thread strength of the clamping studs 25 are designed according to the thrust required by the positioning body 21 to squeeze the trapezoidal metal ring 19 to generate deformation. The trapezoidal metal ring 19 is deformed by the axial thrust transmitted by the cylinder on the positioning body 21 and the extrusion force of the bushing 18 to form a seal. The locking mechanism 31 of the positioner 4 passes through the shoulder of the cover 22 and 24 lock pins. The spring 23 co-located with the shoulders completes the radial telescopic movement of the locking pin 24, thereby realizing the automatic positioning of the entire connecting device on the cutting pipe, and the locking mechanism 31 and each group of clamping studs 25 are alternately arranged in turn along the circumferential direction.

In Fig. 6 and Fig. 7, the diameter of the inner surface of the gland 27 of the auxiliary sealing box 5 and the inner surface of the auxiliary sealing body 28, as well as the inner diameter of the packing 29 and the lower ○-shaped sealing ring 30 are all adjusted according to the outer diameter of the submarine pipeline, and the positioning body 21 and auxiliary sealing body 28, the strength of the pipe thread and the specifications of the packing 29 and the lower ○-shaped sealing ring 30 are selected according to the physical properties and pressure of the seawater around the submarine pipeline, while the quantity and thread strength of the adjusting studs 26 are based on The pressing sleeve 27 compresses the packing 29 to produce the thrust required for deformation to be designed. The packing 29 is deformed by pressing the pressure sleeve 27 to form a seal, while the lower ○-shaped sealing ring 30 is deformed by co-extruding the annular groove of the auxiliary sealing body 28 and the original annular surface of the cut pipe to form a seal.

In Fig. 8, the eccentricity adjustment process of the quick repair connection device is that the deviation adjustment body 6 of the deviation adjustment device 1 is connected with the deviation adjustment seat 11 through the deviation adjustment bolt 9 and the spherical gasket 10, and the deviation adjustment bolt 9 is kept In a loose state, when the eccentricity of θ occurs between the newly replaced pipe and the cut pipe, by adjusting the spherical gasket 10 of each deviation adjustment bolt 9, relying on the lateral force between the deviation adjustment body 6 and the deviation adjustment seat 11 and their spherical cooperation Self-adjustment, adjust the angle between the newly replaced pipeline and the cut pipeline to θ, so that the axes of the submarine pipeline at both ends of the newly replaced pipeline remain parallel, and finally quickly tighten the deviation adjustment bolts 9, relying on the clamping force transmitted by the deviation adjustment body 6 Two upper hexagonal metal rings 7 and one upper ○-shaped sealing ring 8 are deformed respectively to form a ○-shaped sealing ring seal and a metal ring seal to ensure the sealing between the newly replaced pipeline and the connecting device, and complete the sealing of the submarine pipeline. Eccentric adjustment.

In Fig. 9, the main sealing operation process of the quick repair connection device is that the main sealer 3, the positioner 4 and the auxiliary seal box 5 of the whole quick repair connection device move axially along the outer ring surface of the pipe end of the cut pipe, and lock The shaft shoulder of the pin 24 and the shaft shoulder of the blocking cover 22 jointly locate the spring 23 and thereby complete the radial telescopic movement of the locking pin 24, and the locking pin 24 in the locking mechanism 31 of the positioner 4 slides into the prefabricated annular groove of the cutting pipe After the slot, the connecting device is stuck on the cutting pipe and completes its automatic positioning; then, first tighten each clamping stud 25 of the positioner 4, relying on the thrust transmitted by the positioning body 21, the trapezoidal metal in the main sealer 3 The ring 19 moves axially and gradually deforms after being fitted with the prefabricated ring surface of the cut pipe to form a trapezoidal metal ring seal; then, tighten the propulsion studs 12 on the propulsion body 2, and rely on the lower cylinder of the propulsion body 2 to squeeze The rectangular metal ring 14 in the main sealer 3 is deformed to form a rectangular metal ring seal; then, the propelling body 2 continues to move axially, relying on the thrust transmitted by the thrust ring 15 and the extrusion force of the bushing 18, the main sealer 3 The tapered metal ring 16 in the pipe is deformed and combined with the sealant to form a tapered metal ring seal, thereby ensuring the sealing between the prefabricated ring surface of the cut pipe and the connecting device; finally, the propulsion body 2 continues to move axially to its annular groove Clamp into the lower hexagonal metal ring 13 in the main sealer 3, and squeeze the lower hexagonal metal ring 13 to deform to form a metal ring seal, to ensure the seal between the propulsion body 2 and the main sealer 3, and complete the main seal Operation.

In Fig. 10, the auxiliary sealing operation process of the quick repair connection device is as follows: each adjusting screw 26 of the auxiliary sealing box 5 is tightened, and the thrust transmitted by the pressure sleeve 27 squeezes the packing 29 and deforms to form a packing Sealing, to ensure the sealing between the original annulus of the cutting pipe and the connecting device, and complete the auxiliary sealing operation, so as to realize the connection between the newly replaced pipe and the cutting pipe according to the connecting device.

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. An adjustable deflection type submarine pipeline quick repair connection device, which is composed of a deflection adjuster, a propulsion body, a main sealer, a positioner and an auxiliary seal box from top to bottom, and its overall design is a thick-walled cylindrical rotary body At the same time, it adopts a variety of sealing technologies such as metal seals such as metal rings and metal rings, and non-metallic seals such as ○-shaped seals and packing seals to ensure the fixation and sealing between the connecting device and the pipeline, and it can be adjusted according to the spherical surface. The eccentric special structure and the locking mechanism of the locator realize the eccentric adjustment between the submarine pipelines and the automatic positioning of the connecting device in the repair operation, and the characteristics are as follows: A deviation adjuster; the deviation adjuster of the deviation adjuster adopts a structure combining a cylindrical cylinder and a spherical cylinder, and the inner and outer spherical surfaces of the spherical cylinder are concentric and the centers of the inner and outer spherical surfaces are located on the axis of the deviation adjuster ;The outer ring surface of the bias adjustment seat adopts a spherical surface, and the spherical surface and the inner spherical surface of the spherical cylinder of the bias adjustment body are both precision ground, and the two spherical surfaces are always kept concentric to form a spherical fit; the spherical surface of the bias adjustment seat is composed of There are annular grooves arranged in layers from top to bottom. The upper two layers of annular grooves have the same cross-section and adopt the shape of a combination of rectangle and isosceles trapezoid. The upper hexagonal metal rings are sequentially arranged in them, and the offset adjustment seat The cross-section of the lowest layer of the annular groove is rectangular, and an upper ○-shaped sealing ring is arranged inside; each deviation adjustment bolt adopts a spherical gasket, and is respectively placed in the upper part of the deviation adjustment screw hole of the deviation adjustment body and the lower part of the deviation adjustment screw hole of the deviation adjustment seat in the groove; A propulsion body; the lower end surface of the disc-shaped flange of the propulsion body is provided with an annular groove, the section of the annular groove is isosceles trapezoidal, the inner surface of the propulsion body adopts a stepped rotary surface structure, and the lower part of the outer ring surface is processed There are annular grooves arranged in layers; a friction pair is formed between the propulsion body and the main sealing body, and a moving pair is formed between the thrust ring of the main sealer and the cutting pipe; A main sealer; the cross section of the trapezoidal metal ring of the main sealer is an isosceles trapezoid, the cross section of the rectangular metal ring is rectangular, and the cross section of the tapered metal ring is a right angle trapezoid; the upper end surface of the main seal body is processed with An annular groove of the same size as the disk-shaped flange of the propulsion body. The lower hexagonal metal ring is arranged in the annular groove. The middle part of the main sealing body is designed with glue injection holes evenly arranged along the circumferential direction. The inner surface of the main sealing body The top is thin and the bottom is thick, and the bushing is placed at the variable section of the inner surface; the thrust ring and the bushing are both cylindrical cylinders, the section of the thrust ring is L-like, and the section of the bushing is wedge-shaped; the thrust ring The outer ring surface of the bushing is transitionally matched with the inner surface of the main seal body to form a friction pair, while the lower part of the inner surface is matched with the prefabricated ring surface of the cutting pipe to form a moving pair; There are round holes with the same number and size as the glue injection holes in the body, and rectangular slits corresponding to the round holes of the bushing are cut on the ring body of the tapered metal ring, and the slits are filled with sealant; the upper part of the inner surface of the bushing is made of inverted Conical surface, and the lower part of its inner surface cooperates with the prefabricated annulus of the cutting pipe to form a moving pair, and the lower end surface of the bushing is designed as a conical surface; A locator; the positioning body of the locator includes two parts, an upper cylinder and a lower cylinder, wherein clamping screw holes arranged in groups are arranged around the lower cylinder, and the middle part of the positioning body is processed with holes uniformly arranged along the circumferential direction. The lock hole contains a locking mechanism, and the lock hole and each group of clamping screw holes on the lower cylinder of the positioning body are arranged in a staggered order; A moving pair is formed between the annulus of the body and the hole wall corresponding to the lock hole of the positioning body, and a wedge-shaped groove is processed on the inner cylinder of the lock pin; An auxiliary sealing box; the upper chamber of the auxiliary sealing body of the auxiliary sealing box is processed with an annular groove. The packing, and the friction pair is formed by the transition fit between the lower chamber wall and the outer ring surface of the pressure sleeve. 2. The adjustable deflection submarine pipeline quick repair connection device according to claim 1, characterized in that: the metal ring sealing technology of the adjustable deflection submarine pipeline quick repair connection device includes rectangular metal rings, conical metal rings And the trapezoidal metal ring, the rectangular metal ring, the tapered metal ring and the trapezoidal metal ring are arranged coaxially on the prefabricated ring surface of the cutting pipe from top to bottom, and the diameter of the inner surface is larger than the diameter of the prefabricated ring surface of the cutting pipe. Metal wires are evenly distributed inside the ring and wrapped with metal foil, and the material of each metal ring body is made of metal with high strength and strong temperature resistance; The metal ring sealing technology of the adjustable partial subsea pipeline quick repair connection device includes an upper hexagonal metal ring and a lower hexagonal metal ring, and the upper hexagonal metal ring contains two hexagonal metal rings arranged in parallel up and down , and there is only one lower hexagonal metal ring and it is placed concentrically with each upper hexagonal metal ring. The axes of the submarine pipelines are parallel, and the centerlines of the elongated sections of the upper hexagonal metal rings intersect with the axes of the submarine pipelines at the same point; each metal ring adopts a thick metal ring body, and the metal ring body is made of Metal with high strength and strong temperature resistance, each metal ring is wrapped with metal foil; The ○-shaped sealing ring sealing technology of the adjustable partial submarine pipeline quick repair connection device includes an upper ○-shaped sealing ring and a lower ○-shaped sealing ring, and the material of each ○-shaped sealing ring is made of corrosion-resistant and high-temperature resistant rubber; The technical filler adopts annular packing with a rectangular cross-section, and the packing is braided by carbon fiber pre-impregnated with PTFE emulsion. 3. The adjustable deflection-type subsea pipeline quick repair connection device according to claim 1, characterized in that: the wall thickness of the upper cylindrical cylinder of the deflection adjuster of the deflection adjuster is the same as that of the newly replaced pipeline and the wall of the cut pipeline. The thickness is the same, and the diameters of the small end circles of the inner spherical surface and outer spherical surface of the lower spherical cylinder are equal to the inner diameter and outer diameter of the newly replaced pipe and the cut pipe respectively; The inner surface of the body of the deviation adjustment seat adopts a cylindrical surface, and the diameter of the inner surface of the body is equal to the inner diameter of the newly replaced pipe, and the axial length of the spherical bonding zone between the deviation adjustment body and the deviation adjustment seat needs to be greater than the height of the spherical surface of the deviation adjustment seat one-half of Each layer of annular grooves on the spherical surface of the deviation adjustment seat is placed obliquely along the spherical surface of the deviation adjustment seat, and the cone apex of the cone surface where the center line of each layer of annular grooves is located is aligned with the inner and outer spherical surfaces of the deviation adjustment seat and the deviation adjustment seat. The center of the sphere remains concentric. 4. The adjustable deflection type submarine pipeline quick repair connection device according to claim 1 or 3, characterized in that: the lower ends of the deflection adjustment body and the deflection adjustment seat are provided with disc flanges and the disc flanges There are deviation adjustment screw holes with the same specification and size processed all around, and the lower part of the deviation adjustment screw hole of the deviation adjustment body and the upper part of the deviation adjustment screw hole of the deviation adjustment seat are designed with conical hole walls; When the eccentricity occurs between the newly replaced pipeline and the cut pipeline, adjust the spherical gasket of each deviation adjustment bolt, and rely on the lateral force between the deviation adjustment body and the deviation adjustment seat and its spherical surface to adjust itself, so as to achieve the adjustment of the eccentricity of the submarine pipeline. the goal of. 5. The adjustable deflection-type subsea pipeline quick repair connection device according to claim 1, characterized in that: the upper end surface of the propulsion body is connected with the disc-shaped flange of the deflection adjuster seat by welding, and simultaneously propels The middle part of the body is also provided with a disc-shaped flange, and the connection between the propulsion body and the main sealer is realized through the propulsion stud; The diameter of the upper cylindrical surface of the inner surface of the propulsion body is equal to the inner diameter of the newly replaced pipe, while the diameter of the lower cylindrical surface of the inner surface is equal to the diameter of the prefabricated annulus of the cutting pipe; It is rectangular and filled with lubricating oil, and at the same time pushes the lower part of the inner and outer annulus for finishing; The lower part of the outer annulus of the propelling body transition fits with the inner wall of the main sealing body and the inner wall of the thrust ring of the main sealer, while the lower part of the inner surface of the propelling body fits in a gap with the prefabricated annulus of the cutting pipe. 6. The adjustable deflection type subsea pipeline rapid repair connection device according to claim 1, characterized in that: the main sealer adopts trapezoidal metal ring, rectangular metal ring and tapered metal ring to form a metal ring seal to realize the connection The fixing and sealing between the device and the prefabricated annulus of the cutting pipeline, and the metal ring sealing is formed by the lower hexagonal metal ring, so as to realize the sealing between the propulsion body and the main sealer; The annular groove of the main sealing body coincides with the cylindrical surface where the central line of the annular groove of the propulsion body is located; The axis of each glue injection hole of the main sealing body is perpendicular to the axis of the main seal body, and the wall of the glue injection hole is connected with the set screw through an internal thread. 7. The adjustable deflection type submarine pipeline rapid repair connection device according to claim 1, characterized in that: the inner and outer ring surfaces of the thrust ring are all finished, and at the same time, a rectangular metal ring is arranged in the upper ring cavity of the thrust ring; The outer ring surface of the bush is positioned in the cavity of the main sealing body by setting an annular clamp, and a tapered metal ring is arranged in the ring cavity of the bush, and the round hole and the injection hole in the middle and upper part of the bush cylinder One-to-one correspondence and their axes coincide; The slit of the tapered metal ring is parallel to the axis of the bushing, and the width of the slit is greater than the diameter of the bushing hole; The taper of the inverted conical surface of the inner surface of the bush is equal to the taper of the outer conical surface of the conical metal ring and is greater than the equivalent friction angle between the inner wall of the bush and the conical metal ring, and the cone height of the inverted conical surface is greater than that of the conical metal ring. the height of the metal ring; The lower end surface of the bush and the tapered surface at the upper end of the positioning body together form an annular cavity with an isosceles trapezoidal section and accommodate the trapezoidal metal ring. 8. The adjustable offset type submarine pipeline quick repair connection device according to claim 1, characterized in that: the positioner includes a positioning body and a locking mechanism, the outer ring surface of the cylinder on the positioning body and the main sealing body The inner wall is transition fit, and the taper and taper height of the upper end of the taper are the same as the taper and taper height of the lower end of the bushing; The diameter of the outer ring surface of the lower cylinder of the positioning body is equal to the outer diameter of the disc flange of the deviation adjustment body and the deviation adjustment seat, the outer diameter of the disc flange of the propulsion body, and the diameter of the outer ring surface of the main sealing body; at the same time The clamping screw holes around the lower cylinder are drilled into circular through holes and the fixation of the locator on the main sealer is realized by setting the clamping studs; The inner surface of the positioning body is in clearance fit with the prefabricated annulus of the cutting pipe; The axis of each lock hole of the positioning body is perpendicular to the axis of the positioning body, and the walls of each lock hole are finished. 9. The adjustable bias type subsea pipeline quick repair connection device according to claim 1, characterized in that: the locking mechanism of the locator is composed of a lock pin, a spring and a cover, and the ring surface of the outer cylinder of the cover is The locking mechanism is fixed on the positioning body through threads, and the joint of the end faces of the inner cylinder of the cover forms a shoulder; The shaft shoulder at the junction of the outer cylinder end surface of the lock pin of the locking mechanism and the shaft shoulder of the cover co-locate the spring passing through it, thereby completing the radial telescopic movement of the lock pin. 10. The adjustable deviation-type subsea pipeline quick repair connection device according to claim 1, characterized in that: the auxiliary sealing box adopts packing and a lower ○-shaped sealing ring to form a packing seal and a ○-shaped sealing ring to achieve Fixing and sealing between the connection device and the original annulus of the cut pipe; The outer ring surface of the auxiliary sealing body is machined with sealing pipe threads, and the surroundings of the lower end surface are drilled with adjusting screw holes uniformly arranged along the circumferential direction, and the axial advancement of the compression sleeve is realized through the adjusting studs; The outer ring surface of the pressure sleeve is finished, and the diameter of its inner surface is equal to the outer diameter of the cut pipe; The lower end of the pressure sleeve adopts a disc-shaped flange, and the diameter of the disc-shaped flange is equal to the diameter of the outer ring surface of the auxiliary sealing body.