CN113319428A

CN113319428A - Submarine pipeline welding device

Info

Publication number: CN113319428A
Application number: CN202110888784.6A
Authority: CN
Inventors: 欧立立
Original assignee: Shandong Xinding Technology Co Ltd
Current assignee: Shandong Xinding Technology Co Ltd
Priority date: 2021-08-04
Filing date: 2021-08-04
Publication date: 2021-08-31
Anticipated expiration: 2041-08-04
Also published as: CN113319428B

Abstract

The invention relates to the technical field of pipeline welding, in particular to a submarine pipeline welding device, which comprises an upper pipe sleeve seat, a lower pipe sleeve seat, a guide rail and laser welding equipment, wherein the upper pipe sleeve seat is movably arranged on the lower pipe sleeve seat, a processing cavity for pipeline welding can be formed when the upper pipe sleeve seat and the lower pipe sleeve seat are attached, the guide rail is arranged in the processing cavity, and the laser welding equipment is movably arranged on the guide rail, and the submarine pipeline welding device also comprises: the connecting assemblies are at least one group and are arranged on the upper pipe sleeve seat and/or the lower pipe sleeve seat; the sealing module is arranged between the upper pipe sleeve seat and the lower pipe sleeve seat and is used for sealing the processing cavity; the air drying system is arranged between the upper pipe sleeve seat and the lower pipe sleeve seat; carry out the welded mode to moist pipeline for traditional direct control laser welding equipment, the pipeline welding position that this device finally obtained connects the quality higher, is difficult to appear the condition that drops between the pipeline.

Description

Submarine pipeline welding device

Technical Field

The invention relates to the technical field of pipeline welding, in particular to a submarine pipeline welding device.

Background

With the continuous development of the ocean by human beings, it becomes more and more necessary to lay a transmission pipeline or a line on the ocean floor, for example, a pipeline for transmitting oil and gas or a power transmission or information transmission cable, which is usually laid in a pre-laid pipeline to ensure the safety of the power transmission or information transmission cable, so that the submarine pipeline plays a crucial role in ocean engineering.

With the development of science and technology, the current technology can completely realize the work of directly laying pipelines on the seabed and welding and assembling multiple pipelines, and normal pipeline welding work can be realized by directly throwing a welding device to the seabed and discharging seawater during welding.

When traditional welding set removed two pipelines and processed the interior laminating of cavity, directly carried out welding process with laser welding equipment to pipeline welding position, although the sea water is outside processing cavity eduction gear, the adnexed sea water of pipeline surface remains and has seriously reduced ultimate welding quality, and the pipeline also takes place the phenomenon that drops easily at later stage during operation.

Disclosure of Invention

The present invention is directed to a welding device for submarine pipelines, which solves the above problems of the background art.

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

the utility model provides a submarine pipeline welding set, includes top tube cover seat, lower tube cover seat, guide rail and laser welding equipment, top tube cover seat activity sets up on lower tube cover seat to, top tube cover seat and lower tube cover seat can constitute when laminating and supply pipeline welded processing cavity, the guide rail sets up in the processing cavity, the laser welding equipment activity sets up on the guide rail, be equipped with the water pump on the lower tube cover seat, be equipped with the suction nozzle that communicates with the water pump in the processing cavity, still include:

the linking assemblies are at least one group in number, are arranged on the upper pipe sleeve seat and the lower pipe sleeve seat, and are used for moving the pipelines and performing primary connection work on the pipelines;

the sealing module is arranged between the upper pipe sleeve seat and the lower pipe sleeve seat and is used for sealing the processing cavity;

the air drying system is arranged between the upper pipe sleeve seat and the lower pipe sleeve seat and used for performing air drying treatment on the welding position of the pipeline, and comprises an air storage tank, an execution component and an output element, wherein the air storage tank is communicated with the execution component through the output element;

the execution component includes at least:

the number of the semi-ring guide seats is at least one group, the semi-ring guide seats are movably arranged between the upper pipe casing seat and the lower pipe casing seat, and the number of the semi-ring guide seats in each group is two;

the drying box is movably arranged on the semi-ring guide seat and is communicated with the output element;

the rotating blade is movably arranged in the drying box;

the air nozzle is movably arranged on the drying box and connected with the rotating blade, and the air nozzle is communicated with the drying box;

the gear is also movably arranged on the drying box and is connected with the rotating blade, and a plurality of teeth meshed with the gear are annularly distributed on the semi-ring guide seat;

the rotating blade moves when meeting with the airflow output by the output element and controls the air nozzle and the gear to synchronously move relative to the drying box.

The application further adopts the technical scheme that: the connecting assembly comprises a side arm, a mounting seat, a driving element, a movable seat and at least one mechanical arm;

the side arm is connected with the upper pipe sleeve seat, the movable seat is movably arranged on the side arm, each mechanical arm is movably arranged on the side arm through the mounting seat, the driving element is arranged between the mounting seat and the side arm, and the position of each mechanical arm can be adjusted through the driving element.

The application further adopts the technical scheme that: the sealing module comprises a telescopic piece, a power piece and a sealing unit;

the telescopic piece, the power piece and the sealing unit are all arranged between the upper pipe sleeve seat and the lower pipe sleeve seat, wherein the power piece is connected with the sealing unit, and the telescopic piece is controlled by the power piece to work when working.

The application further adopts the technical scheme that: the sealing unit comprises an air bag and a monitoring structure;

the gasbag sets up between last pipe cover seat and lower pipe cover seat, the control structure sets up in the gasbag, control structure and water pump electric connection, when the volume of gasbag reached the settlement threshold value, control structure control water pump work.

This application still further technical scheme: the monitoring structure comprises a fixed seat, a conductive block, a conductive strip and an elastic piece;

the fixing seat is arranged on the inner wall of one side of the air bag, the conducting block is movably arranged on the fixing seat and is connected with the inner wall of the other side of the air bag through the elastic piece, and the conducting bar is arranged on the fixing seat and is located on the moving path of the conducting block.

This application still further technical scheme: an air flow channel is arranged in the semi-ring guide seats, an air inlet communicated with the air flow channel is arranged on one semi-ring guide seat in each group, and the air inlet is communicated with the output element;

an electric valve for controlling the opening and closing of the air flow channel is arranged in the air flow channel, a ring strip is movably arranged on each semi-ring guide seat, the drying box is arranged on one ring strip, and an exhaust port for communicating the air flow channel with the drying box is arranged on each ring strip.

This application still further technical scheme: and sealing strips are arranged between the adjacent semi-ring guide seats and the ring strips, the execution assembly further comprises a transmission module which is arranged between the rotating blade and the air nozzle, and the angle between the air nozzle and the drying box can be adjusted by the transmission module when the rotating blade works.

The application adopts a further technical scheme that: the transmission module comprises a cam, an abutting head and a driving rod;

the cam is connected with the rotating blade, the contact is movably arranged on the drying box and is elastically connected with the drying box, the contact is abutted against the cam to be matched with the cam, and the driving rod is hinged between the air nozzle and the abutting head through the rotating shaft.

Compared with the prior art, the technical scheme provided by the embodiment of the invention has the following beneficial effects:

according to the embodiment of the invention, the air drying system is arranged between the upper pipe sleeve seat and the lower pipe sleeve seat, the power of air flow is converted into the power of the rotating blade and the gear, the air nozzle is driven to do 360-degree circumferential circulating motion relative to the processing cavity under the meshing action of the gear and the teeth, so that the dead-angle-free air drying treatment is carried out on the pipeline welding position of the processing cavity, the seawater left at the submarine pipeline welding position is removed, and compared with the traditional mode of directly controlling the laser welding equipment to weld the wet pipeline, the device has the advantages that the finally obtained pipeline welding position has higher connection quality, and the pipelines are not easy to fall off.

Drawings

FIG. 1 is a schematic structural view of a marine pipeline welding apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a partial structure of a wind drying system in the welding device of the submarine pipeline according to the embodiment of the invention;

FIG. 3 is an enlarged schematic view of a welding apparatus for a subsea pipeline according to an embodiment of the present invention, shown at A in FIG. 1;

FIG. 4 is an assembly view of a semi-ring guide and a ring strip of the marine pipeline welding apparatus according to the embodiment of the present invention;

fig. 5 is a partial structural view of a sealing unit in the welding apparatus for a submarine pipeline according to the embodiment of the present invention.

Reference numbers in the drawings illustrate:

1-upper pipe socket, 2-lower pipe socket, 3-joint component, 301-side arm, 302-mounting seat, 303-mechanical arm, 304-first hydraulic cylinder, 305-second hydraulic cylinder, 4-air drying system, 41-air storage tank, 42-actuating component, 4201-semi-ring guide seat, 4202-air inlet hole, 4203-electric valve, 4204-sealing strip, 4205-tooth, 4206-drying box, 4207-ring strip, 4208-rotating blade, 4209-air outlet, 4210-air nozzle, 4211-gear, 4213-contact, 4214-cam, 4215-driving rod, 43-fan, 5-guide rail, 6-laser welding equipment, 7-suction nozzle, 8-water pump, 9-sealing module, 91-third hydraulic cylinder, 92-cylinder, 93-sealing unit, 931-air bag, 932-fixed seat, 933-conductive block, 934-conductive strip and 935-tension spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments of the present invention, belong to the protection scope of the present invention, and the present invention is further described with reference to the embodiments below.

Referring to fig. 1-5, in an embodiment of the present application, an apparatus for welding a submarine pipeline includes an upper pipe sleeve holder 1, a lower pipe sleeve holder 2, a guide rail 5, and a laser welding device 6, where the upper pipe sleeve holder 1 is movably disposed on the lower pipe sleeve holder 2, and when the upper pipe sleeve holder 1 and the lower pipe sleeve holder 2 are attached to each other, a processing cavity for welding the pipeline is formed, the guide rail 5 is disposed in the processing cavity, the laser welding device 6 is movably disposed on the guide rail 5, a water pump 8 is disposed on the lower pipe sleeve holder 2, and a suction nozzle 7 communicated with the water pump 8 is disposed in the processing cavity, and the apparatus further includes:

the linking assemblies 3 are at least one group in number, are arranged on the upper pipe sleeve seat 1 and the lower pipe sleeve seat 2, and are used for moving pipelines and performing primary connection work on the pipelines;

the sealing module 9 is arranged between the upper pipe sleeve seat 1 and the lower pipe sleeve seat 2 and is used for sealing the processing cavity;

the air drying system 4 is arranged between the upper pipe sleeve seat 1 and the lower pipe sleeve seat 2 and used for performing air drying treatment on the welding position of a pipeline, the air drying system 4 comprises an air storage tank 41, an execution assembly 42 and an output element, and the air storage tank 41 is communicated with the execution assembly 42 through the output element;

the execution component 42 includes at least:

the number of the semi-ring guide seats 4201 is at least one, the semi-ring guide seats are movably arranged between the upper pipe casing seat 1 and the lower pipe casing seat 2, and the number of the semi-ring guide seats 4201 in each group is two;

a dry box 4206 movably disposed on the half-ring guide 4201 and communicating with the output element;

a rotary blade 4208 movably disposed in the drying box 4206;

a tuyere 4210 movably disposed on the drying box 4206 and connected to the rotary blade 4208, and the tuyere 4210 and the drying box 4206 are communicated;

a gear 4211, also movably disposed on the drying box 4206 and connected to the rotating blade 4208, wherein a plurality of teeth 4205 engaged with the gear 4211 are disposed on the semi-ring guide 4201;

the vanes 4208 move when they meet the airflow output from the output element and control the synchronized movement of the tuyere 4210 and the gear 4211 relative to the dry box 4206.

Specifically, as shown in fig. 1, the suction nozzle 7 is disposed on the lower socket 2, and the output element may be an air pump or a blower 43 as long as the air in the air tank 41 can be delivered into the drying box 4206, in this embodiment, the output element is preferably a blower 43, and the blower 43 is disposed on the upper socket 1.

In the present embodiment, the engaging assembly 3 includes a side arm 301, a mounting base 302, a driving element, a movable base, and at least one mechanical arm 303;

the side arm 301 is connected with the upper tube sleeve base 1, the movable base is movably arranged on the side arm 301, each mechanical arm 303 is movably arranged on the side arm 301 through the mounting base 302, the driving element is arranged between the mounting base 302 and the side arm 301, and the driving element can adjust the position of the mechanical arm 303.

It should be particularly noted that the driving element includes a first hydraulic cylinder 304 and a second hydraulic cylinder 305, the first hydraulic cylinder 304 is connected between the movable seat and the mounting seat 302, and the second hydraulic cylinder 305 is disposed between the movable seat and the side arm 301.

It should be added that a position adjusting element (not shown in the figures) is provided between the guide rail 5 and the laser welding device 6 for adjusting the position of the laser welding device 6 on the guide rail 5, and of course, the position adjusting element may be in the form of an air-cushion guide rail 5 or in a motor-driven manner, and is not limited in particular.

In practical application, the whole device is put into the sea floor, the mechanical arm 303 clamps two pipelines, the positions of the mounting seat 302 and the side arm 301 of the movable seat relative to the mounting seat are adjusted through the first hydraulic cylinder 304 and the second hydraulic cylinder 305, so that the connecting end of the two pipelines is moved between the upper pipe sleeve seat 1 and the lower pipe sleeve seat 2 and the two pipelines are connected in an inserting manner, then the lower pipe sleeve seat 2 is moved to be tightly attached to the upper pipe sleeve seat 1, so as to form a processing cavity, in the process, the processing cavity is sealed through the sealing module 9, external seawater is prevented from entering the processing cavity, meanwhile, the seawater in the processing cavity is pumped out along the suction nozzle 7 through the operation of the water pump 8, then the fan 43 is controlled to be electrified and operated, gas in the gas storage tank 41 is sprayed on the surface of a pipeline welding position along the drying tank 4206 and the air nozzle 4210, so as to dry the welding position, the influence on the welding effect caused by seawater is avoided, when air flow passes through the drying box 4206, the rotary vanes 4208 and the gear 4211 are driven to rotate, under the meshing action between the gear 4211 and the teeth 4205, the drying box 4206 and the air nozzles 4210 move circumferentially along the semi-ring guide seat 4201, therefore, the pipeline welding position is dried for 360 degrees, drying dead corners are avoided, in the process, the rotary vanes 4208 can continuously adjust the angle between the air nozzles 4210 and the drying box 4206, the area of a drying area is increased, the drying effect is further improved, compared with a traditional mode of directly welding wet pipelines, the welding effect is further improved, finally, the laser welding device 6 is controlled to move on the guide rail 5 through a position adjusting element, and the welding position is welded for 360 degrees.

Referring to fig. 1 and 5, as another preferred embodiment of the present application, the sealing module 9 includes a telescopic member, a power member, and a sealing unit 93;

the extensible member, the power member and the sealing unit 93 are all arranged between the upper pipe casing seat 1 and the lower pipe casing seat 2, wherein the power member is connected with the sealing unit 93, and the extensible member is controlled by the power member during working to enable the sealing unit 93 to work.

It should be specifically noted that the telescopic member may be a linear motor, an electric cylinder or a hydraulic cylinder, in this embodiment, the telescopic member is preferably a third hydraulic cylinder 91, and the third hydraulic cylinder 91 is connected between the upper pipe socket 1 and the lower pipe socket 2, which is not specifically limited herein.

In the present embodiment, the sealing unit 93 includes an air bag 931 and a monitoring structure;

the gasbag 931 sets up between upper casing seat 1 and lower casing seat 2, the control structure sets up in gasbag 931, control structure and water pump 8 electric connection, when the volume of gasbag 931 reaches the settlement threshold value, control structure control water pump 8 work.

It should be noted that the power member may be an air pump or an air cylinder 92, in this embodiment, the power member is preferably an air cylinder 92, the air cylinder 92 is connected between the upper pipe sleeve seat 1 and the lower pipe sleeve seat 2, and the fixed end of the air cylinder 92 is communicated with the air bag 931.

Preferably, the monitoring structure comprises a fixed seat 932, a conductive block 933, a conductive strip 934 and an elastic piece;

the fixing base 932 is disposed on an inner wall of one side of the air bag 931, the conductive piece 933 is movably disposed on the fixing base 932 and connected to the inner wall of the other side of the air bag 931 through an elastic member, and the conductive strip 934 is disposed on the fixing base 932 and located on a moving path of the conductive piece 933.

Of course, the monitoring structure in this embodiment is not limited to a matching manner of the conductive block 933 and the conductive bar 934, and may also be replaced by a manner of matching a set of electrode pads or plugs with sockets, and is not limited in this respect.

It should be specifically noted that the elastic member may be a spring, a spring plate, or an elastic steel plate structure, in this embodiment, the elastic member is preferably a tension spring 935, and a specific model of the tension spring 935 is not specifically limited herein.

When two pipelines are inserted and closed to be connected and are in the position between upper pipe sleeve seat 1 and the lower pipe sleeve seat 2, through controlling the shrink of third pneumatic cylinder 91, make and closely laminate between upper pipe sleeve seat 1 and the lower pipe sleeve seat 2, in this process, cylinder 92 shrink, thereby make the inside gas of cylinder 92 stiff end be crowded into gasbag 931, make gasbag 931 take place the inflation, when gasbag 931 inflation, make conducting block 933 relative fixing base 932 remove, until gasbag 931 and pipeline surface closely laminate when realizing the sealing process to the processing cavity, contact between conducting block 933 and the conducting bar 934, thereby trigger the sea water discharge in 8 circular telegram work of water pump will processing cavity, avoid sea water influence weldment work.

Referring to fig. 1-4, as another preferred embodiment of the present application, an airflow channel is disposed in the half-ring guide seat 4201, an air inlet port 4202 communicated with the airflow channel is disposed on one of the half-ring guide seats 4201, and the air inlet port 4202 is communicated with an output element;

an electric valve 4203 for controlling the opening and closing of the air flow channel is arranged in the air flow channel, a ring 4207 is movably arranged on each half-ring guide seat 4201, the drying box 4206 is arranged on one of the ring 4207, and an exhaust port 4209 for communicating the air flow channel with the drying box 4206 is arranged on the ring 4207.

In the embodiment, a sealing strip 4204 is disposed between the adjacent half ring guide seat 4201 and the ring strip 4207, and the actuating assembly 42 further includes a transmission module disposed between the rotating blade 4208 and the wind nozzle 4210, wherein the angle between the wind nozzle 4210 and the drying box 4206 is adjustable by the transmission module when the rotating blade 4208 is operated.

Without limitation, the sealing strip 4204 may be made of rubber or plastic, and is not limited herein.

Specifically, the transmission module comprises a cam 4214, an interference head 4213 and a driving rod 4215;

the cam 4214 is connected with the rotary vane 4208, the collision head 4213 is movably arranged on the drying box 4206 and is elastically connected with the drying box 4206, the collision head 4213 is in collision fit with the cam 4214, and the driving rod 4215 is hinged between the tuyere 4210 and the collision head 4213 through a rotating shaft.

It should be noted that, the elastic connection in the embodiment may be replaced by a spring plate, an elastic steel plate, or a spring structure, and is not limited herein.

The electric valve 4203 is controlled to open while the conductive block 933 and the conductive bar 934 are in contact, so that the air flow channels between the adjacent half ring guide seats 4201 are communicated, the fan 43 sprays air in the air storage tank 41 from the air nozzles 4210 to the welding position of the pipeline surface along the air inlet port 4202, the air flow channels and the air outlet port 4209, and in the process, the air flow drives the rotating vanes 4208 and the gear 4211 to rotate, under the meshing action between the gear 4211 and the teeth 4205, the ring strip 4207 and the drying box 4206 are driven to rotate along the air flow channels, at this time, the ring strip 4207 can play a role in preventing seawater from entering the air flow channels or the air in the air storage tank 41 from leaking, so that the 360-degree air drying treatment of the welding position is realized, the seawater left in the welding position is prevented from affecting the welding effect, and simultaneously, the rotating cam 4214 is driven to rotate while the rotating vane 4208 drives the gear 4211, and is interfered by the meshing action between the cam 4214 and the interference head 4213, the contact base reciprocates up and down in the direction shown in fig. 3, and the air nozzle 4210 is driven to swing along the hinged position under the action of the driving rod 4215, so that the area of an air drying area is increased, and the welding quality between final pipelines is further improved.

The specific working principle of the application is as follows: putting the whole device into the sea, clamping two pipelines through a mechanical arm 303, adjusting the positions of a mounting seat 302 and a movable seat relative to a side arm 301 through a first hydraulic cylinder 304 and a second hydraulic cylinder 305, moving the connecting ends of the two pipelines between an upper pipe sleeve seat 1 and a lower pipe sleeve seat 2 and inserting and connecting the two pipelines, then controlling a third hydraulic cylinder 91 to contract to enable the upper pipe sleeve seat 1 and the lower pipe sleeve seat 2 to be tightly attached, in the process, contracting a cylinder 92 to enable gas inside the fixed end of the cylinder 92 to be squeezed into an air bag 931 to enable the air bag 931 to expand, enabling a conductive block 933 to move relative to a fixed seat 932 when the air bag 931 expands, enabling the conductive block 933 to contact with a conductive bar 934 until the air bag 931 and the surface of the pipeline are tightly attached to realize sealing treatment on a processing cavity, triggering the water pump 8 to be electrified to work so as to discharge seawater in the processing cavity, the seawater is prevented from influencing the welding work. The electric valve 4203 is controlled to open while the conductive block 933 and the conductive bar 934 are in contact, so that the air flow channels between the adjacent half ring guide seats 4201 are communicated, the fan 43 sprays air in the air storage tank 41 from the air nozzles 4210 to the welding position of the pipeline surface along the air inlet port 4202, the air flow channels and the air outlet port 4209, and in the process, the air flow drives the rotating vanes 4208 and the gear 4211 to rotate, under the meshing action between the gear 4211 and the teeth 4205, the ring strip 4207 and the drying box 4206 are driven to rotate along the air flow channels, at this time, the ring strip 4207 can play a role in preventing seawater from entering the air flow channels or the air in the air storage tank 41 from leaking, so that the 360-degree air drying treatment of the welding position is realized, the seawater left in the welding position is prevented from affecting the welding effect, and simultaneously, the rotating cam 4214 is driven to rotate while the rotating vane 4208 drives the gear 4211, and is interfered by the meshing action between the cam 4214 and the interference head 4213, make to touch the seat like the direction reciprocating motion from top to bottom that fig. 3 shows, drive tuyere 4210 along its articulated department swing through the effect of actuating lever 4215, and then increase the regional area of air-dry processing, further improved the welding quality between the final pipeline, directly carry out welded mode to moist pipeline relatively the tradition, further improved the welding effect, finally, move on guide rail 5 through position control element control laser welding equipment 6, carry out 360 welding process to the welding position.

The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a submarine pipeline welding set, includes top tube sleeve seat, lower tube sleeve seat, guide rail and laser welding equipment, top tube sleeve seat activity sets up on lower tube sleeve seat to, top tube sleeve seat and lower tube sleeve seat can constitute when laminating and supply pipeline welded processing cavity, the guide rail sets up in the processing cavity, the laser welding equipment activity sets up on the guide rail, be equipped with the water pump on the lower tube sleeve seat, be equipped with the suction nozzle that communicates with the water pump in the processing cavity, its characterized in that still includes:

the linking assemblies are at least one group in number, are arranged on the upper pipe sleeve seat and/or the lower pipe sleeve seat, and are used for moving the pipeline and performing primary connection work on the pipeline;

the sealing module is arranged between the upper pipe sleeve seat and the lower pipe sleeve seat and is used for sealing the processing cavity; and

the air drying system is arranged between the upper pipe sleeve seat and the lower pipe sleeve seat and used for performing air drying treatment on the welding position of the pipeline, and comprises an air storage tank, an execution component and an output element, wherein the air storage tank is communicated with the execution component through the output element; wherein

The execution component includes at least:

the rotating blade is movably arranged in the drying box;

the air nozzle is movably arranged on the drying box and connected with the rotating blade, and the air nozzle is communicated with the drying box; and

2. The subsea pipeline welding apparatus of claim 1, wherein the engagement assembly comprises a side arm, a mounting block, a drive element, a movable block, and at least one robotic arm;

3. The subsea pipeline welding apparatus of claim 1, wherein the sealing module comprises a telescoping member, a power member, and a sealing unit;

the telescopic piece, the power piece and the sealing unit are all arranged between the upper pipe sleeve seat and the lower pipe sleeve seat, wherein the power piece is connected with the sealing unit, and the telescopic piece controls the sealing unit to work through the power piece during working.

4. Subsea pipeline welding device according to claim 3, characterized in that the sealing unit comprises a gas bag and a monitoring structure;

5. The subsea pipeline welding device according to claim 4, wherein the monitoring structure comprises a fixed seat, a conductive block, a conductive strip, and a resilient member;

6. The marine pipeline welding apparatus of claim 1, wherein a gas flow channel is provided in the semi-ring guides, and a gas inlet hole communicated with the gas flow channel is provided in one of the semi-ring guides in each set, the gas inlet hole being communicated with the output member;

7. The marine pipeline welding apparatus of claim 6, wherein a sealing strip is disposed between each of the ring half guide seats and the ring strip.

8. The marine pipeline welding apparatus of claim 6, wherein the actuator assembly further comprises a drive module disposed between the rotor blade and the nozzle, the rotor blade being operable to adjust an angle between the nozzle and the drying box via the drive module.

9. The subsea pipeline welding apparatus of claim 8, wherein the transmission module comprises a cam, an interference head, and a drive rod;