A flange device integrating hole opening and fixing functions for underwater oil pumping

Abstract

The application provides a flange device integrating hole opening and fixing functions for underwater oil pumping, and belongs to the technical field of shipwreck or seabed pipeline cargo oil recovery and oil pumping operation process. The flange device comprises a base fixing device, a hole opening device, a locking device and a ball valve. The base fixing device is used for fixedly connecting the whole flange device with a ship plate or a steel structure. The hole opening device is installed on the base fixing device and is used for opening holes in the ship plate or the steel structure. The locking device is connected with the hole opening device and is used for tightly fixing the whole flange device with the ship plate or the steel structure after the holes are opened. The ball valve is connected with the hole opening device and is used for connecting with an external oil pumping pump pipe to perform oil pumping operation. The application has the characteristics of high integration, simple operation, high safety and efficiency, stability and reliability, wide application range and the like.

Description

Technical Field

[0001] This invention relates to the technical field of oil recovery and pumping operations from sunken ships or subsea pipelines, and more particularly to a flange device for underwater oil pumping that integrates opening and fixing functions. Background Technology

[0002] After a ship sinks or encounters distress at sea, its fuel oil / cargo oil must be recovered promptly; otherwise, serious ecological problems such as oil spills and environmental pollution, as well as secondary disasters, will occur. Because the ship is submerged, oil extraction is extremely difficult. First, drilling is required, and ensuring a tight seal after drilling is a major technical challenge. Current technology involves divers drilling bolt holes underwater, installing bolts, flanges and valves, installing a drilling machine, opening the extraction port, closing the valves, recovering the drilling machine, installing the oil pump, and then opening the valves to extract the oil. While safe, this process is complex. A similar process is involved in the installation of diversion flanges during the maintenance of marine engineering oil pipelines.

[0003] Therefore, in summary, it is necessary to provide a flange device for underwater oil pumping that integrates opening and fixing functions to overcome the shortcomings of the existing technology. Summary of the Invention

[0004] The existing technology described above involves divers drilling bolt holes, installing bolts, flanges and valves, installing a hole opener, opening an oil extraction port, closing valves, retrieving the hole opener, installing an oil pump, and opening valves to extract oil. While safe, the process is complex. Similar technical problems exist in the installation of diversion flanges during the maintenance of marine oil pipelines. Therefore, this invention provides a flange device for underwater oil extraction that integrates hole opening and fixing functions. This invention mainly integrates a base for fixing, hole opening, feeding, locking, and an oil extraction ball valve. The flange device is connected to the ship plate or other structure to be drilled via a strong magnet on the base. A hydraulic motor drives the cutter head to open the hole. Simultaneously, the cutter head is manually advanced via a feeding device until the hole is fully drilled. Then, a locking device is used to secure the device to the structure with the hole, and finally, the oil pump is connected and the ball valve is activated to perform the oil extraction operation.

[0005] The technical means employed in this invention are as follows:

[0006] A flange device integrating opening and fixing functions for underwater oil pumping is placed on a ship plate or steel structure to be pumped. The flange device includes a base fixing device, an opening device, a locking device, and a ball valve. The base fixing device is used to fix the entire flange device to the ship plate or steel structure. The opening device is installed on the base fixing device and is used to open a hole in the ship plate or steel structure. The locking device is connected to the opening device and is used to securely fasten the entire flange device to the ship plate or steel structure after the hole is opened. The ball valve is connected to the opening device and is used to connect to an external oil pump pipe for oil pumping operations.

[0007] Furthermore, the base fixing device includes a flange base and multiple strong magnets installed on the flange base. The opening device is installed on the flange base, and the strong magnets are fixedly connected to the ship plate or steel structure by magnetic attraction.

[0008] Furthermore, the drilling device includes a sleeve, a grooved inner tube, a cutting head, a rotating device, and a manual feed device. The ball valve is connected to the sleeve, the grooved inner tube is located inside the sleeve, and the flange base of the base fixing device has a through hole in the middle. The cutting head is connected to one end of the grooved inner tube and passes through the through hole in the middle of the flange base. The rotating device is connected to the grooved inner tube and is used to drive the grooved inner tube to rotate with the cutting head to perform drilling operations. The manual feed device is installed on the sleeve and is in contact with the other end of the grooved inner tube to realize the feeding movement of the grooved inner tube and the cutting head.

[0009] Furthermore, the rotating device includes a rotary hydraulic reducer and a hydraulic motor. The hydraulic motor is connected to the rotary hydraulic reducer, and the rotary hydraulic reducer is connected to the grooved inner tube via a key. The hydraulic motor is driven to rotate by external hydraulic power, which in turn drives the rotary hydraulic reducer to rotate, and the grooved inner tube rotates accordingly.

[0010] Furthermore, the manual feed device includes a manual wheel and a worm, an internal keyed worm wheel, a grooved feed screw, an upper limit plate for the internal threaded hole, and a lower limit plate for the through hole located inside the sleeve. The end of the manual wheel inserted into the sleeve is axially connected to the worm. The worm and the internal keyed worm wheel are engaged by a key. The internal keyed worm wheel is connected to the grooved feed screw by a key. The upper and lower ends of the grooved feed screw are engaged by keys with the upper limit plate for the internal threaded hole and the lower limit plate for the through hole, respectively. The upper limit plate for the internal threaded hole and the lower limit plate for the through hole are fixedly connected to the sleeve and are located above and below the internal keyed worm wheel, respectively.

[0011] When the cutter head needs to advance, turn the manual wheel, and the worm will rotate accordingly. The rotation of the worm will drive the internal key worm wheel to rotate, and the rotation of the internal key worm wheel will drive the grooved feed screw to rotate. Under the limit of the upper limit plate of the internal threaded hole and the lower limit plate of the through hole, the grooved feed screw will make a linear feed motion, pushing the grooved inner tube in contact with the grooved feed screw to feed, so that the grooved inner tube drives the cutter head to feed and open the hole.

[0012] Furthermore, a scrap bin is provided in the central through hole of the flange base. The scrap bin is an annular space used to collect scrap generated during the drilling operation.

[0013] Furthermore, the grooved inner tube is provided with a perforated limiting plate in the middle. The end of the grooved feed screw that contacts the grooved inner tube is a stepped rod segment with a gradually decreasing diameter. During the feeding operation, the small-diameter section at the head end of the stepped rod segment is inserted into the middle hole of the perforated limiting plate to realize the connection between the grooved feed screw and the grooved inner tube, and to limit the end of the grooved feed screw.

[0014] Furthermore, the locking device includes two wedge-shaped locks, a slide rail, and a spring. The two ends of the slide rail are fixedly connected to the grooved inner tube. The two wedge-shaped locks are connected to the two ends of the slide rail. The spring is sleeved on the slide rail, and the two ends of the spring are respectively connected to the two wedge-shaped locks. Symmetrical through holes are provided on the wall of the grooved inner tube. The outer end of the wedge-shaped lock is an inclined surface, which is located in the through hole and can move in and out of the through hole.

[0015] When the hole is opened and feeding continues, the locking device passes through the hole, and the inclined surface of the wedge-shaped locking device contacts the hole. During the entire process of the locking device entering the hole, the wedge-shaped locking device is in a contracted state based on the inclined surface and the spring. After the locking device passes through the hole, the wedge-shaped locking device enters the hole, the space is released, the spring extends, and the wedge-shaped locking device expands outward and locks the inside of the hole.

[0016] Furthermore, the cutter head is provided with a retractable ejector pin in the middle.

[0017] Furthermore, the ball valve has a flange structure at the top for connecting oil pipes. After the hole is opened and the flange device is securely fastened to the ship plate or steel structure, the oil pump is started to carry out subsequent oil pumping work.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. The flange device for underwater oil pumping that integrates opening and fixing functions provided by the present invention has the characteristics of high integration, simple operation, safety and efficiency, stability and reliability, and wide applicability.

[0020] 2. The flange device for underwater oil pumping provided by this invention integrates opening and fixing functions, which simplifies the preparatory work procedures for underwater oil pumping operations. It not only reduces the underwater working time of divers and greatly shortens the offshore construction cycle and saves on ship usage costs, but also provides another option for underwater flange installation operations by ensuring a secure lock.

[0021] Based on the above reasons, this invention can be widely applied in fields such as installing docking flanges during oil pumping operations after a ship has sunk or encountered distress at sea, and installing diversion flanges during the maintenance of marine engineering oil pipelines. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the present invention.

[0024] Figure 2 This is a schematic diagram of the feeding device of the present invention.

[0025] Figure 3 These are front and side views of the feeding device structure of the present invention, wherein (a) is the front view and (b) is the side view.

[0026] Figure 4 This is a schematic diagram of the locking device of the present invention, wherein (a) is a front view and (b) is a bottom view.

[0027] Figure 5 This is a top view of the grooved inner tube of the present invention.

[0028] Figure 6 This is a front view of the present invention.

[0029] In the diagram: 1. Ball valve; 2. Sleeve; 3. Manual feed device; 4. Grooved inner tube; 5. Cutting head; 6. Locking device; 7. Rotary hydraulic reducer; 8. Hydraulic motor; 9. Flange base; 10. Strong magnet; 11. Chip bin;

[0030] 3.1 Manual wheel; 3.2 Worm gear; 3.3 Internal keyed worm gear; 3.4 Grooved feed screw; 3.5 Upper limit plate of internal threaded hole; 3.6 Lower limit plate of through hole; 4.1 Perforated limit plate; 5.1 Telescopic ejector pin; 6.1 Wedge lock; 6.2 Slide rail; 6.3 Spring. Detailed Implementation

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0034] The purpose of this invention is to ensure the sealing performance after the hole is opened and that subsequent oil pumping can be carried out continuously while opening the hole in the structure to be opened, so as to design and manufacture a flange device with high integration, simple operation, safety and efficiency, stability and reliability and wide applicability.

[0035] like Figure 1-6 As shown, this invention provides a flange device for underwater oil pumping that integrates opening and fixing functions, belonging to the field of oil recovery and pumping operations for sunken ships or subsea pipelines. This flange device integrates a base for fixing, opening, feeding, locking, and a pumping ball valve. The basic operating principle is as follows: the flange device is connected to the ship plate or other structure to be opened via a strong magnet on the base. A hydraulic motor is started to drive the cutting head to open the hole. Simultaneously, the cutting head is manually advanced via a feeding device until the hole is completely opened. Then, the locking device is used to secure the device to the structure with the opening. Finally, the pumping pump is connected, and the ball valve is activated to perform the pumping operation.

[0036] This invention relates to a flange device for underwater oil pumping that integrates opening and fixing functions. It is placed on the ship's plate or other steel structure to be pumped. The device mainly includes a base fixing device, an opening device, a locking device, and a ball valve. The flange base is in direct contact with the steel structure and is fixedly connected by a magnet. The opening device is powered by a hydraulic motor and transmits power to the opening. The locking device securely fastens the entire flange device to the steel structure after opening. The ball valve connects to an external oil pump pipe for pumping operations. This invention features a simple structure, integrated opening and fixing functions, high efficiency, and a simple pre-process for underwater oil pumping.

[0037] Preferably, the base fixing device includes a strong magnet, a flange base, and a scrap bin. Its main function is to fix the flange device to the ship plate or other steel structure to be drilled for oil extraction. There are four strong magnets, which are directly connected to the steel structure by magnetic attraction. The flange base is the strong magnet support structure, which connects the strong magnets to the rest of the flange device. The scrap bin is an annular space used to store the scrap generated after drilling.

[0038] Preferably, the drilling device includes a hydraulic motor, a rotary hydraulic reducer, a grooved inner tube, a cutter head, a manual feed device, and a sleeve. Its main function is to feed and drill holes. The hydraulic motor is connected to the rotary hydraulic reducer, and external hydraulic power drives the hydraulic motor to rotate, which in turn drives the rotary hydraulic reducer. The rotary hydraulic reducer is connected to the grooved inner tube via a key, causing the grooved inner tube to rotate. The end of the grooved inner tube is the cutter head, which rotates to drill holes in the ship plate. The metal chips generated during drilling enter the metal chip bin. The manual feed device includes a manual wheel, a worm gear, an internal keyed worm wheel, a grooved feed screw, an upper limit plate for the internal threaded hole, and a lower limit plate for the through hole. As the drilling progresses, when the cutter head needs to advance, the diver or ROV will rotate the manual wheel, which is axially connected to the worm gear. The worm gear rotates accordingly, which in turn drives the internal keyed worm wheel, which is connected to it via a key, to rotate. The rotation of the internal keyed worm wheel drives the grooved feed screw, which is connected to it via a key, to rotate. Since the grooved feed screw engages with the upper limit plate of the internal threaded hole, the grooved feed screw feeds, pushing the grooved inner tube to feed. The feeding of the grooved inner tube drives the cutter head to advance and drill the hole.

[0039] Preferably, the locking device includes a wedge-shaped lock, a slide rail, and a spring. Its main function is to tightly lock the flange device to the pre-drilled structure, ensuring both firmness and sealing. When the cutter head penetrates the steel plate and completes the drilling, the feed continues, and the locking device will pass through the drilled hole. The wedge-shaped lock is an inclined surface that contacts the drilled hole. During the entire process of the locking device entering the drilled hole, the wedge-shaped lock will be compressed due to the inclined surface, and the wedge-shaped lock will contract through the spring. After passing through the drilled hole, the wedge-shaped lock enters the hole, the space is released, the spring extends, and the wedge-shaped lock expands outward, locking the inside of the hole. At this time, rotating the manual wheel in the opposite direction will cause the grooved inner tube to retract, which will bring the locking device back. The wedge-shaped lock will then be in close contact with the inner surface of the drilled hole. The greater the retraction torque, the stronger the tightness. At this time, the locking device will ensure that the entire flange device is firmly and securely fastened to the steel structure surface of the drilled hole.

[0040] Preferably, the ball valve is located at the top of the flange assembly and is used to connect with the oil pipe via the flange during oil pumping. The top of the ball valve is a flange structure, which is pre-connected to the oil pipe. After the hole is opened and the flange assembly is securely fastened to the steel structure surface, the oil pump is started to carry out subsequent oil pumping operations.

[0041] Example 1

[0042] When carrying out on-site operations, Figure 1 The complete flange assembly shown is assembled underwater by divers or ROV equipment onto the steel structure surface to be drilled. It is fixed to the steel structure surface by the magnetic attraction of a strong magnet 10, which is connected to the flange assembly via the flange base 9, ensuring the assembly is securely fixed. A hydraulic line connects the flange assembly to the construction mothership, which is equipped with a power station. Upon starting the power station, the hydraulic motor 8 begins operation, driving the rotary hydraulic reducer 7. The rotary hydraulic reducer 7 is connected to the grooved inner tube 4 via a key, causing the inner tube 4 to rotate. The end of the grooved inner tube 4 has a cutter head 5, which rotates to drill into the steel structure surface. Considering the magnetic attraction of the strong magnet 10, the drilling speed can be reduced to ensure the stability of the entire flange assembly during drilling. A retractable ejector pin 5.1 is located in the middle of the cutter head 5. As drilling progresses, iron filings are generated and collected into the iron filings bin 11.

[0043] As the drilling progresses, the cutter head 5 needs to be pushed forward to ensure the drilling depth. This feeding operation is actively completed by the diver or ROV equipment using external force. The manual wheel 3.1 is actively controlled by external force. The manual wheel 3.1 is directly axially connected to the worm 3.2, so the worm 3.2 rotates accordingly. The worm 3.2 is engaged with the internal keyed worm wheel 3.3 through a key, so the internal keyed worm wheel 3.3 rotates accordingly. The rotation of the internal keyed worm wheel 3.3 will drive the grooved feed screw 3.4, which is connected to the key, to rotate. The grooved feed screw 3.4 is engaged with the upper limit plate 3.5 of the internal threaded hole through a key. Since the upper limit plate 3.5 of the internal threaded hole is a fixed structure, the grooved feed screw 3.4 will generate a feeding action. The grooved feed screw 3.4 is in direct planar contact with the grooved inner tube 4. The feeding of the grooved feed screw 3.4 will push the grooved inner tube 4 forward, and then push the cutter head 5 forward. This forward speed is controlled by external force, and the drilling operation is carried out on the premise of ensuring the stability of the entire flange device. The grooved inner tube 4 is provided with a perforated limiting plate 4.1 in the middle. The end of the grooved feed screw 3.4 that contacts the grooved inner tube 4 is a stepped rod segment with a gradually decreasing diameter. During the feeding operation, the small diameter segment at the head end of the stepped rod segment is inserted into the middle hole of the perforated limiting plate 4.1 to realize the connection between the grooved feed screw 3.4 and the grooved inner tube 4, and to limit the end of the grooved feed screw 3.4.

[0044] When the cutter head 5 penetrates the steel pile structure, the drilling work is completed, and the feeding operation continues. Behind the cutter head 5 is the locking device 6, which has a wedge-shaped slope. As the feeding continues, the locking device enters the drilled hole. Due to the size of the wedge-shaped slope, the wedge-shaped locking 6.1 will be compressed. The two wedge-shaped lockings 6.1 are connected by a spring 6.3. The spring 6.3 will contract along the slide rail 6.2. After the wedge-shaped locking 6.1 passes through the drilled hole, the space becomes larger, and the wedge-shaped locking 6.1 is no longer restricted. Spring 6.3 will then extend, and wedge-shaped locking 6.1 will return to its original position. Since the outer edge of the wedge-shaped locking 6.1's slope exceeds the diameter of the hole, it will lock onto the inner side of the steel structure. At this point, rotating the manual wheel 3.1 in the reverse direction will retract the locking device 6. The wedge-shaped locking 6.1 will then fit tightly against the inner side of the steel structure. The greater the reverse rotation of the manual wheel 3.1, the greater the retraction of the wedge-shaped locking 6.1, resulting in a tighter fit between the locking device 6 and the steel pile structure, and a more secure fixation of the entire flange assembly. At this point, the drilling and fixing work is complete.

[0045] The last part of the entire flange assembly is a ball valve 1 structure. The outer side of the ball valve is a flange structure. Before the flange assembly is installed, this flange is connected to the external oil pump oil pipe. Then, the oil pump is started, the ball valve is adjusted, and subsequent oil pumping work is carried out.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flange device for underwater oil pumping that integrates opening and fixing functions, characterized in that, The flange device is placed on the ship plate or steel structure to be drilled for oil extraction. The flange device includes a base fixing device, a drilling device, a locking device (6) and a ball valve (1). The base fixing device is used to fix the entire flange device to the ship plate or steel structure. The drilling device is installed on the base fixing device and is used to drill holes in the ship plate or steel structure. The locking device (6) is connected to the drilling device and is used to securely fasten the entire flange device to the ship plate or steel structure after drilling. The ball valve (1) is connected to the drilling device and is used to connect to an external oil pump pipe for oil extraction. The hole-opening device includes a sleeve (2), a grooved inner tube (4), a cutter head (5), a rotating device, and a manual feed device (3). The ball valve (1) is connected to the sleeve (2). The grooved inner tube (4) is located inside the sleeve (2). The flange base (9) of the base fixing device has a through hole in the middle. The cutter head (5) is connected to one end of the grooved inner tube (4) and passes through the through hole in the middle of the flange base (9). The rotating device is connected to the grooved inner tube (4) and is used to drive the grooved inner tube (4) to rotate with the cutter head (5) to perform hole-opening operations. The manual feed device (3) is installed on the sleeve (2) and is in contact with the other end of the grooved inner tube (4) to realize the feeding movement of the grooved inner tube (4) and the cutter head (5). The rotating device includes a rotary hydraulic reducer (7) and a hydraulic motor (8). The hydraulic motor (8) is connected to the rotary hydraulic reducer (7). The rotary hydraulic reducer (7) is connected to the grooved inner tube (4) by a key. The hydraulic motor (8) is driven to rotate by external hydraulic power, which drives the rotary hydraulic reducer (7) to rotate, and the grooved inner tube (4) rotates accordingly. The manual feed device (3) includes a manual wheel (3.1) and a worm (3.2), an internal keyed worm wheel (3.3), a grooved feed screw (3.4), an upper limit plate (3.5) for the internal threaded hole, and a lower limit plate (3.6) for the through hole located inside the sleeve (2). The end of the manual wheel (3.1) inserted into the sleeve (2) is axially connected to the worm (3.2). The worm (3.2) and the internal keyed worm wheel (3.3) are engaged by a key. The internal keyed worm wheel (3.3) is connected by a key to the grooved feed screw (3.4). The upper and lower sides of the grooved feed screw (3.4) are engaged by keys to the upper limit plate (3.5) for the internal threaded hole and the lower limit plate (3.6) for the through hole, respectively. The upper limit plate (3.5) for the internal threaded hole and the lower limit plate (3.6) for the through hole are fixedly connected to the sleeve (2) and are located above and below the internal keyed worm wheel (3.3), respectively. When the cutter head (5) needs to move forward, turn the manual wheel (3.1), and the worm (3.2) will rotate accordingly. The rotation of the worm (3.2) will drive the inner key worm wheel (3.3) to rotate. The rotation of the inner key worm wheel (3.3) will drive the grooved feed screw (3.4) to rotate. Under the limit of the upper limit plate (3.5) of the inner thread hole and the lower limit plate (3.6) of the through hole, the grooved feed screw (3.4) will make a linear feed motion, pushing the grooved inner tube (4) in contact with the grooved feed screw (3.4) to feed, so that the grooved inner tube (4) drives the cutter head (5) to feed and open the hole.

2. The flange device for underwater oil pumping that integrates opening and fixing functions as described in claim 1, characterized in that, The base fixing device includes a flange base (9) and multiple strong magnets (10) installed on the flange base (9). The hole opening device is installed on the flange base (9). The strong magnets (10) are fixedly connected to the ship plate or steel structure by magnetic attraction.

3. The flange device for underwater oil pumping that integrates opening and fixing functions as described in claim 1, characterized in that, The flange base (9) is also provided with a chip bin (11) in the middle through hole. The chip bin (11) is an annular space used to collect the chips generated during the hole opening operation.

4. The flange device for underwater oil pumping that integrates opening and fixing functions as described in claim 1, characterized in that, The grooved inner tube (4) is provided with a perforated limiting plate (4.1) in the middle. The end of the grooved feed screw (3.4) that contacts the grooved inner tube (4) is a stepped rod segment with a gradually decreasing diameter. During the feeding operation, the small diameter segment at the head end of the stepped rod segment is inserted into the middle hole of the perforated limiting plate (4.1) to realize the connection between the grooved feed screw (3.4) and the grooved inner tube (4) and limit the end of the grooved feed screw (3.4).

5. The flange device for underwater oil pumping that integrates opening and fixing functions as described in claim 1, characterized in that, The locking device (6) includes two wedge-shaped locks (6.1), a slide rail (6.2), and a spring (6.3). The two ends of the slide rail (6.2) are fixedly connected to the grooved inner tube (4). The two wedge-shaped locks (6.1) are connected to the two ends of the slide rail (6.2). The spring (6.3) is sleeved on the slide rail (6.2), and the two ends of the spring (6.3) are respectively connected to the two wedge-shaped locks (6.1). The grooved inner tube (4) has symmetrical through holes on its wall. The outer end of the wedge-shaped lock (6.1) is an inclined surface, which is located in the through hole and can move in and out of the through hole. When the hole is opened and feeding continues, the locking device (6) passes through the hole, and the inclined surface of the wedge-shaped locking device (6.1) contacts the hole. During the entire process of the locking device (6) entering the hole, the wedge-shaped locking device (6.1) is in a contracted state based on the inclined surface and the spring (6.3). After the locking device (6) passes through the hole, the wedge-shaped locking device (6.1) enters the hole, the space is released, the spring (6.3) stretches, and the wedge-shaped locking device (6.1) expands outward and locks the inside of the hole.

6. The flange device for underwater oil pumping that integrates opening and fixing functions as described in claim 1, characterized in that, The cutter head (5) is provided with a retractable ejector pin (5.1) in the middle.

7. The flange device for underwater oil pumping that integrates opening and fixing functions as described in claim 1, characterized in that, The ball valve (1) has a flange structure on the top for connecting oil pipes. After the hole is opened and the flange device is securely fastened to the ship plate or steel structure, the oil pump is started to carry out subsequent oil pumping work.

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