Underwater natural gas extraction device

Abstract

The invention discloses an underwater natural gas extraction device, which relates to the field of natural gas extraction, and comprises a connecting pipe fitting and an adapter pipe fitting butted with the upper end of the connecting pipe fitting, an operation table is arranged at the lower end of the transfer pipe fitting, a supporting frame is arranged at the lower end of the operation table, and two sets of electric main valves are arranged in the transfer pipe fitting. According to the underwater natural gas extraction device, impurities and water flow in natural gas can be removed, the purity of the natural gas is guaranteed, and the complexity of follow-up natural gas purification is reduced; a liquid level sensor is arranged, the liquid level of water flow accumulated in the discharging frame can be detected, blockage in the pipeline is avoided, and the ventilation effect in the pipeline is guaranteed; according to the device, impurities in the discharging frame can be cleaned through auger blades, accumulation of the impurities is reduced, a filtering piece is cleaned through a cleaning rod, the continuous filtering effect of the filtering piece can be guaranteed, the cleanliness of the interior of the device is effectively guaranteed, and then the use convenience of the device is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of natural gas exploitation, in particular to an underwater natural gas exploitation device. BACKGROUND

[0002] In the process of exploiting underground energy, a special exploitation device needs to be used, and in the process of exploiting underwater natural gas, the influence of water flow needs to be paid attention to. However, the existing exploitation device still has some use defects in the process of use. When the existing device removes water, the water cannot be separated cleanly, so that the water flowing out contains impurities, affecting the subsequent purification use.

[0003] The patent with the patent authorization publication number CN119981801A discloses an underwater automatic gas extraction device. Nitrogen is introduced into the inside of a filtering and defoaming cylinder through a nitrogen inlet pipe, and the air in the inside of the filtering and defoaming cylinder is extruded, so that the air in the inside of the filtering and defoaming cylinder is discharged through an air discharge pipe, thereby avoiding the mixing of subsequent air and mixed gas-liquid substances. The structure can effectively intercept impurity objects contained in the mixed gas-liquid substances, can perform defoaming treatment on the mixed gas-liquid substances with foam, can reduce the processing burden of a subsequent gas-liquid separation tank, can improve the separation efficiency of the gas-liquid separation tank, can facilitate the cleaning of residual substances in the inside of the filtering and defoaming cylinder, and can discharge the air in the inside of the filtering and defoaming cylinder after cleaning, thereby reducing the influence of external air on the mixed gas-liquid substances.

[0004] The patent with the patent authorization publication number CN207776854U discloses a water removal device for natural gas exploitation. The water removal device is provided, oil, water and gas are separated through the first filter screen, so that the gas can go out of the gas outlet, and the emulsifier can wrap the oil floating on the water surface, so that the water and oil can be separated, and the second filter screen can be filtered again. When the oil and water come down, the water can come out of the water outlet by adjusting the control valve adjusting handle, and when the oil is seen, the push rod can be tightened by the baffle spring, so that the oil can be prevented from flowing out. The water can be quickly drained, so that the oil and gas in the natural gas can be quickly separated.

[0005] In the above-mentioned disclosed patent, the exploitation device in the patent solves the problems mentioned above, but the exploitation device in the patent still has the following problems. Although the exploitation device in the patent realizes the exploitation of underwater natural gas to a certain extent and performs preliminary impurity removal treatment on the extracted gas, some deficiencies still exist in the actual use process. After a long time of continuous work, a large amount of impurities may accumulate in the inside of the impurity removal cylinder. If the impurities cannot be cleaned in time, the work efficiency of the device may be affected by manual cleaning, and even the device may be damaged, thereby reducing the convenience of use of the exploitation device.

[0006] In view of the above problems, it is urgent to make innovative design on the basis of the original device structure. SUMMARY

[0007] The underwater natural gas exploitation device aims to solve the problem that the existing exploitation device may accumulate a large amount of impurities in the impurity removal cylinder after long-time continuous work, and if the cleaning cannot be done in time, the work efficiency of the device may be affected, and even the device may be damaged, thereby reducing the convenience of using the exploitation device.

[0008] To achieve the above object, the present application provides the following technical scheme: an underwater natural gas exploitation device, comprising a connecting pipe and an adapter pipe connected to the upper end of the connecting pipe; the lower end of the adapter pipe is provided with an operation table, the lower end of the operation table is provided with a support frame, and the inside of the adapter pipe is provided with two groups of electric main valves; a support is arranged between the adapter pipe and the operation table; the inside of the adapter pipe is provided with an impurity removal cylinder; a filter structure arranged in the impurity removal cylinder can filter and discharge impurities in the gas; a cleaning structure arranged in the impurity removal cylinder can ensure stable filtration of impurities in the gas; and a butt joint structure arranged on the outside of the connecting pipe can quickly complete pipe butt joint.

[0009] Preferably, the filter structure comprises a mounting plate, the mounting plate is fixedly installed in the inside of the fixed cylinder, two groups of fixed cylinders are fixedly installed on the side of the mounting plate close to the entering end of the adapter pipe, and a return spring is arranged in the inside of the fixed cylinder.

[0010] Preferably, a sliding rod is slidingly installed in the inside of the fixed cylinder away from the mounting plate, a sealing element is fixedly installed on the end of the sliding rod away from the fixed cylinder, and the sealing element is sealingly connected with the impurity removal cylinder.

[0011] Preferably, the filter structure further comprises a filter plate one and a filter plate two, the filter plate one and the filter plate two are clamped and installed in the inside of the impurity removal cylinder, and the filter plate one and the filter plate two are located on the end of the mounting plate away from the sealing element.

[0012] Preferably, a discharge frame is fixedly installed on the lower end of the impurity removal cylinder, a discharge pipe is fixedly installed on the lower end of the discharge frame, and an electric auxiliary valve is arranged in the inside of the discharge pipe.

[0013] Preferably, a liquid level sensor is arranged on the outside of the discharge frame, a fixing element is fixedly installed in the inside of the discharge frame, two groups of lifting rods are slidingly installed in the inside of the fixing element, floating elements are fixedly installed on the upper ends of the two groups of lifting rods, and a sealing circular table is fixedly installed on the lower ends of the two groups of lifting rods, the sealing circular table is sealingly connected with the upper end of the discharge pipe at its lower end.

[0014] Preferably, the cleaning structure comprises a driving motor, the driving motor is fixedly installed outside the discharging frame, the output end of the driving motor is fixedly connected with the rotating disc assembly rotatably installed inside the discharging frame, the rotating shaft fixedly installed on the side, away from the driving motor, of the rotating disc assembly is rotatably connected with the discharging frame, and the outer side of the rotating shaft is fixedly installed with auger blades, and the outer side of the auger blades is tightly attached to the lower end of the discharging frame.

[0015] Preferably, the outer side of the rotating disc assembly is rotatably installed with a pushing rod, the upper end of the pushing rod is rotatably installed with a driven rod, the driven rod is slidably connected with the mounting block fixedly installed inside the discharging frame, the upper end of the driven rod is rotatably installed with a connecting rod, one end of the connecting rod, away from the driven rod, is rotatably installed with a rotating rod, the central rod fixedly installed on the end of the rotating rod, away from the connecting rod, is rotatably connected with the first filter plate and the second filter plate, the first filter plate, the second filter plate and the central rod are on the same straight line, and the two groups of cleaning rods provided on the outer side of the central rod are tightly attached to the first filter plate and the second filter plate.

[0016] Preferably, the connecting pipe comprises an upper pipe and a lower pipe, the upper pipe is located at the upper end of the lower pipe, the butt joint structure comprises a fixed connecting block, the fixed connecting block is fixedly installed at the lower end of the upper pipe, the inner side of the fixed connecting block is rotatably installed with a rotating limiting block, and the rotating limiting block and the fixed connecting block are provided with six groups at equal angles about the upper pipe.

[0017] Preferably, the connecting pipe comprises an upper pipe and a lower pipe, the upper pipe is located at the upper end of the lower pipe, the butt joint structure comprises a fixed connecting block, the inner side of the fixed connecting block is rotatably installed with a rotating limiting block, and the rotating limiting block and the fixed connecting block are provided with six groups at equal angles about the upper pipe.

[0018] Preferably, the butt joint structure further comprises a threaded rotating cylinder, the threaded rotating cylinder is rotatably installed outside the upper end of the lower pipe and the upper pipe, the outer side of the threaded rotating cylinder is provided with rotating handle rods at equal angles, and the upper end of the threaded rotating cylinder is located outside the fixed connecting block.

[0019] Compared with the prior art, the present application has the following beneficial effects: 1. The impurity removal cylinder and the discharging frame can remove impurities and water flow in natural gas, ensure the purity of natural gas, reduce the complexity of subsequent natural gas purification, and effectively improve the convenience of the device for natural gas exploitation. 2. The liquid level sensor can detect the water flow liquid surface accumulated inside the discharging frame, avoid causing blockage inside the pipeline, and ensure the ventilation effect inside the pipeline. 3. Further, through the arrangement of the auger blade and the cleaning rod, the auger blade can clean the impurities inside the discharging frame, reduce the accumulation of impurities, and the cleaning rod can clean the filter, so as to ensure the continuous filtering effect of the filter, effectively ensure the cleanliness of the device, and improve the convenience of using the device; 4. Further, through the quick butt joint between the upper pipe and the lower pipe, the butt joint construction of the pipeline inside the mining device can be quickly completed, the time required for the construction of the device is shortened, and through the butt joint of different numbers of upper pipes and lower pipes, the device can be applied to mining of different depths underwater, effectively improving the use efficiency of the mining device; 5. Further, the connection inside the device is optimized, a more simple and stable connection mode is adopted, and the use convenience and connection reliability of the device are greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a top view of the three-dimensional structure of the application; Figure 2 It is a bottom view of the three-dimensional structure of the application; Figure 3 It is a top view of the three-dimensional structure of the impurity removal cylinder of the application; Figure 4 It is a top view of the three-dimensional structure of the mounting plate of the application; Figure 5 It is a top view of the three-dimensional structure of the second filter plate of the application; Figure 6 It is a top view of the three-dimensional structure of the sealing element of the application; Figure 7 It is a top view of the three-dimensional structure of the first filter plate of the application; Figure 8 It is a top view of the three-dimensional structure of the auger blade of the application; Figure 9 It is a top view of the three-dimensional structure of the rotating handle of the application; Figure 10 It is a top view of the three-dimensional structure of the rotating limiting block of the application.

[0021] In the figure: 1, connecting pipe; 101, upper pipe; 102, lower pipe; 2, adapter pipe; 3, support frame; 4, operation table; 5, electric main valve; 6, support; 7, impurity removal cylinder; 8, mounting plate; 9, fixed cylinder; 10, sliding rod; 11, return spring; 12, sealing element; 13, filter plate one; 14, filter plate two; 15, discharge frame; 16, discharge pipe; 17, electric auxiliary valve; 18, liquid level sensor; 19, fixing element; 20, lifting rod; 21, floating element; 22, sealing circular table; 23, driving motor; 24, rotating shaft; 25, auger blade; 26, rotating disc assembly; 27, push rod; 28, driven rod; 29, connecting rod; 30, rotating rod; 31, center rod; 32, cleaning rod; 33, mounting block; 34, fixed connecting block; 35, rotating limiting block; 36, threaded rotating cylinder; 37, rotating handle. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0023] The present application provides the technical solutions as follows: a kind of underwater natural gas exploitation device, as shown in Figures 1-8 To solve the problem that the existing exploitation device lacks impurity and water flow removal effect, the process of removing impurities and water flow by the exploitation device is disclosed, which realizes the effect of automatically removing water flow and impurities by the exploitation device, and the specific content is as follows: The connecting pipe fitting 1 and the adapter pipe fitting 2 butted at the upper end of the connecting pipe fitting 1; the lower end of the adapter pipe fitting 2 is provided with an operation table 4, and the lower end of the operation table 4 is provided with a support frame 3, and the inside of the adapter pipe fitting 2 is provided with two groups of electric main valves 5, and the support 6 is arranged between the adapter pipe fitting 2 and the operation table 4, and the inside of the adapter pipe fitting 2 is provided with a dedusting cylinder 7, the filter structure arranged in the dedusting cylinder 7 can filter out the impurities in the gas, and the cleaning structure arranged in the dedusting cylinder 7 can ensure stable filtration of impurities in the gas, the butt joint structure arranged on the outside of the connecting pipe fitting 1 can quickly complete the pipe butt joint, the filter structure includes a mounting plate 8, and the mounting plate 8 is fixedly installed in the inside of a fixed cylinder 9, and two groups of fixed cylinders 9 are fixedly installed on the side of the mounting plate 8 close to the entering end of the adapter pipe fitting 2, and the inside of the fixed cylinder 9 is provided with a reset spring 11, and a sliding rod 10 is slidingly installed in the inside of the end of the fixed cylinder 9 away from the mounting plate 8, and a sealing element 12 is fixedly installed on the end of the sliding rod 10 away from the fixed cylinder 9, and the sealing element 12 is sealingly connected with the dedusting cylinder 7, and the filter structure further includes a filter plate one 13 and a filter plate two 14, and the filter plate one 13 and the filter plate two 14 are clamped and installed in the inside of the dedusting cylinder 7, and the filter plate one 13 and the filter plate two 14 are located at the end of the mounting plate 8 away from the sealing element 12, and the lower end of the dedusting cylinder 7 is fixedly installed with a discharging frame 15, and the lower end of the discharging frame 15 is fixedly installed with a discharging pipe 16, and the inside of the discharging pipe 16 is provided with an electric auxiliary valve 17, and the outside of the discharging frame 15 is provided with a liquid level sensor 18, and the inside of the discharging frame 15 is fixedly installed with a fixed element 19, and the inside of the fixed element 19 is slidingly installed with two groups of lifting rods 20, and the upper end of the lifting rod 20 is fixedly installed with a floating element 21, and the lower end of the lifting rod 20 is fixedly installed with a sealing circular table 22, and the sealing circular table 22 is sealingly connected with the upper end of the discharging pipe 16 at the lower end.

[0024] In use, the device is installed at the location where the natural gas is to be extracted, and after the device is installed, the natural gas can be extracted and transported through the pipeline in the device. In this process, the connecting pipe fitting 1 and the adapter pipe fitting 2 are used to transport the natural gas, and the structure in the dedusting cylinder 7 is used to filter the impurities and water flow in the natural gas to ensure the cleanliness of the natural gas. In the process of gas delivery, the sealing piece 12 is separated from the impurity removal cylinder 7, at which time the inside of the impurity removal cylinder 7 is in an open state, facilitating gas delivery. In the process of movement of the sealing piece 12, the sliding rod 10 slides in the inside of the fixed cylinder 9 and presses the return spring 11, at which time the return spring 11 is contracted. At the same time, the impurities and water flow in the gas are cleaned by the filter structure. In this process, the two groups of electric main valves 5 are in an open state, facilitating the delivery of natural gas. In the process of delivery, the water flow directly flows into the inside of the discharge frame 15, at which time the water flow is directly discharged by opening of the electric auxiliary valve 17 in the inside of the discharge pipe 16. In the process of delivery, the filter plate one 13 and the filter plate two 14 filter the impurities in the gas. In the process of drainage, the two groups of electric main valves 5 are closed, so that the water flow and the impurities are directly discharged through the discharge pipe 16, effectively reducing the impurities in the natural gas. When the discharge pipe 16 is in an open state, the discharge pipe 16 is separated from the sealing circular table 22. After the impurities are discharged through the discharge pipe 16, the sealing circular table 22 is in a sealed state. In the process of accumulation of the water flow in the inside of the discharge frame 15, the height of the water flow is detected by the liquid level sensor 18. The floating piece 21 is arranged, so that after the liquid is discharged from the inside of the discharge frame 15, the upper end of the discharge pipe 16 is automatically sealed, avoiding the situation that the electric auxiliary valve 17 in the inside of the discharge pipe 16 fails to be closed, causing the discharge pipe 16 to be unable to be sealed. By discharging the impurities and the water flow in the inside of the discharge frame 15, the mixed impurities in the natural gas are reduced, the complexity of purification treatment of the natural gas is reduced, and the automatic sealing of the sealing piece 12 and the impurity removal cylinder 7 can avoid the situation of backflow in the pipeline, effectively ensuring the efficiency of the device in natural gas exploitation.

[0025] The embodiment as shown Figures 1-8 In order to solve the problem that the existing exploitation device needs to be cleaned manually, the process of automatic cleaning of impurities of the exploitation device is disclosed, and the effect that the exploitation device can stably work is realized. The specific content is as follows: The cleaning structure comprises a driving motor 23, and the driving motor 23 is fixedly installed outside the discharge frame 15, and the output end of the driving motor 23 is fixedly connected with a rotating disc assembly 26 rotatably installed inside the discharge frame 15, and the rotating shaft 24 fixedly installed on the side, away from the driving motor 23, of the rotating disc assembly 26 is rotatably connected with the discharge frame 15, the outer side of the rotating shaft 24 is fixedly installed with a screw blade 25, and the outer side of the screw blade 25 is tightly attached to the lower end of the discharge frame 15, the outer side of the rotating disc assembly 26 is rotatably installed with a push rod 27, the upper end of the push rod 27 is rotatably installed with a driven rod 28, and the driven rod 28 is slidably connected with a mounting block 33 fixedly installed inside the discharge frame 15, the upper end of the driven rod 28 is rotatably installed with a connecting rod 29, one end of the connecting rod 29, away from the driven rod 28, is rotatably installed with a rotating rod 30, the center rod 31 fixedly installed on the end of the rotating rod 30, away from the connecting rod 29, is rotatably connected with the filter plate one 13 and the filter plate two 14, the filter plate one 13, the filter plate two 14 and the center rod 31 are on the same straight line, and the two groups of cleaning rods 32 provided on the outer side of the center rod 31 are tightly attached to the filter plate one 13 and the filter plate two 14 respectively.

[0026] In use of the underwater natural gas exploitation device, the impurities accumulated inside the discharge frame 15 need to be cleaned to avoid the blockage of the discharge pipe 16, in this process, the rotating disc assembly 26 is driven to rotate by the driving motor 23, and the rotating disc assembly 26 drives the rotating shaft 24 to rotate, and the rotating shaft 24 drives the screw blade 25 to rotate inside the discharge frame 15 to clean the impurities inside the discharge frame 15, so that the impurities inside the discharge frame 15 can be discharged through the discharge pipe 16, and the impurity removal effect of the discharge pipe 16 is ensured. In the process of rotating the rotating disc assembly 26, the rotating disc assembly 26 drives the driven rod 28 to move up and down inside the mounting block 33 through the push rod 27, and the driven rod 28 drives the rotating rod 30 to rotate through the connecting rod 29, and the rotating rod 30 drives the center rod 31 to rotate inside the filter plate one 13 and the filter plate two 14, and the center rod 31 drives the two groups of cleaning rods 32 to rotate to clean the impurities adhered to the outer sides of the filter plate one 13 and the filter plate two 14, reducing the accumulation of impurities inside the discharge frame 15 and the impurity removal cylinder 7, and ensuring the impurity removal effect inside the impurity removal cylinder 7.

[0027] As shown in the embodiments Figures 1-2 and Figures 9-10 To solve the problem that the pipe docking of the existing exploitation device is too complex, the process that the pipe of the exploitation device can be quickly docked is disclosed, and the effect that the exploitation device can be quickly docked is achieved, and the specific content is as follows. The connecting pipe 1 comprises an upper pipe 101 and a lower pipe 102, and the upper pipe 101 is located at the upper end of the lower pipe 102, the butt joint structure comprises a fixed connecting block 34, the inside of the fixed connecting block 34 is rotatably installed with a rotary limiting block 35, and the rotary limiting block 35 and the fixed connecting block 34 are arranged at six groups at equal angles about the upper pipe 101, the butt joint structure further comprises a threaded rotary cylinder 36, the threaded rotary cylinder 36 is rotatably installed outside the upper end of the lower pipe 102 and the upper pipe 101, and the outside of the threaded rotary cylinder 36 is arranged with a rotary handle 37 at equal angles, and the upper end of the threaded rotary cylinder 36 is located outside the fixed connecting block 34.

[0028] In use of the underwater natural gas exploitation device, the connecting pipe 1 needs to be fixed and installed first, and in the installation process, the lower end of the upper pipe 101 needs to be butt jointed with the upper end of the lower pipe 102, and in the butt joint process, the fixed connecting block 34 needs to penetrate the upper end of the lower pipe 102, then the rotary limiting block 35 inside the fixed connecting block 34 can be located outside the lower pipe 102, the lower end of the threaded rotary cylinder 36 is screwed with the outside of the lower pipe 102, at this time, the rotary handle 37 can be pushed to drive the threaded rotary cylinder 36 to rotate outside the lower pipe 102, and the threaded rotary cylinder 36 will contact and drive the rotary limiting block 35 to rotate in the process of upward rotation, and the threaded rotary cylinder 36 will be separated from the rotary limiting block 35 in the process of upward rotation, at this time, the rotary limiting block 35 will rotate to the horizontal state again, the threaded rotary cylinder 36 can be reversely rotated and moved downward, and the threaded rotary cylinder 36 will contact the upper end of the rotary limiting block 35 and be limited when moving downward, at this time, the upper pipe 101 and the lower pipe 102 can be stably butt jointed, so as to complete the assembly of the connecting pipe 1, effectively improve the convenience of the assembly of the exploitation device, and increase the overall practicability.

[0029] The contents not described in detail in the specification belong to the prior art known by the person skilled in the art.

[0030] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An underwater natural gas exploitation device, comprising a connecting pipe (1) and an adapter pipe (2) connected to the upper end of the connecting pipe (1); characterized in that The lower end of the adapter pipe (2) is provided with an operating table (4), the lower end of the operating table (4) is provided with a support frame (3), the inside of the adapter pipe (2) is provided with two groups of electric main valves (5), the support frame (6) is arranged between the adapter pipe (2) and the operating table (4), the inside of the adapter pipe (2) is provided with a decontamination cylinder (7), the filter structure arranged in the decontamination cylinder (7) can filter out impurities in the gas, the cleaning structure arranged in the decontamination cylinder (7) can ensure stable filtration of impurities in the gas, and the butt joint structure arranged on the outer side of the connecting pipe (1) can quickly complete pipe butt joint.

2. An apparatus for the exploitation of natural gas under water according to claim 1, characterized in that: The filter structure comprises a mounting plate (8), the mounting plate (8) is fixedly installed in the inside of a fixed cylinder (9), two groups of fixed cylinders (9) are fixedly installed on one side of the mounting plate (8) close to the entering end of the adapter pipe (2), and the inside of the fixed cylinder (9) is provided with a reset spring (11).

3. An apparatus for the exploitation of natural gas under water according to claim 2, characterized in that: The inside of one end of the fixed cylinder (9) away from the mounting plate (8) is slidably installed with a sliding rod (10), one end of the sliding rod (10) away from the fixed cylinder (9) is fixedly installed with a sealing element (12), and the sealing element (12) is in sealing connection with the decontamination cylinder (7).

4. An apparatus for the exploitation of natural gas under water according to claim 1, characterized in that: The filter structure further comprises a filter plate one (13) and a filter plate two (14), the filter plate one (13) and the filter plate two (14) are clamped and installed in the inside of the decontamination cylinder (7), and the filter plate one (13) and the filter plate two (14) are located at one end of the mounting plate (8) away from the sealing element (12).

5. An apparatus for the exploitation of natural gas under water according to claim 1, characterized in that: The lower end of the decontamination cylinder (7) is fixedly installed with a discharging frame (15), the lower end of the discharging frame (15) is fixedly installed with a discharging pipe (16), and the inside of the discharging pipe (16) is provided with an electric auxiliary valve (17).

6. An apparatus for the recovery of natural gas from under water as claimed in claim 5 wherein: The outer side of the discharging frame (15) is provided with a liquid level sensor (18), the inside of the discharging frame (15) is fixedly installed with a fixed element (19), the inside of the fixed element (19) is slidably installed with two groups of lifting rods (20), the upper ends of the lifting rods (20) are fixedly installed with floating elements (21), the lower ends of the two groups of lifting rods (20) are fixedly installed with sealing circular tables (22), and the sealing circular tables (22) are in sealing connection with the upper ends of the discharging pipes (16) below the lower ends.

7. An apparatus for the exploitation of natural gas under water according to claim 1, characterized in that: The cleaning structure comprises a driving motor (23), the driving motor (23) is fixedly installed on the outer side of the discharging frame (15), the output end of the driving motor (23) is fixedly connected with a rotating disc assembly (26) rotatably installed in the inside of the discharging frame (15), the rotating shaft (24) fixedly installed on one side of the rotating disc assembly (26) away from the driving motor (23) is in rotating connection with the discharging frame (15), the outer side of the rotating shaft (24) is fixedly installed with a screw conveyor blade (25), and the outer side of the screw conveyor blade (25) is closely attached to the lower end of the discharging frame (15).

8. An apparatus for the exploitation of natural gas under water according to claim 7, characterized in that: The outer side of the rotating disc assembly (26) is rotationally installed with a push rod (27), and the upper end of the push rod (27) is rotationally installed with a driven rod (28), and the driven rod (28) is slidably connected with the mounting block (33) fixedly installed inside the discharge frame (15), the upper end of the driven rod (28) is rotationally installed with a connecting rod (29), and the end of the connecting rod (29) away from the driven rod (28) is rotationally installed with a rotating rod (30), the center rod (31) fixedly installed at the end of the rotating rod (30) away from the connecting rod (29) is rotationally connected with the filter plate one (13) and the filter plate two (14), the filter plate one (13), the filter plate two (14) and the center rod (31) are in the same straight line, and the two groups of cleaning rods (32) provided outside the center rod (31) are tightly attached to the filter plate one (13) and the filter plate two (14) respectively.

9. An apparatus for the exploitation of natural gas under water according to claim 1, characterized in that: The connecting pipe fitting (1) comprises an upper pipe fitting (101) and a lower pipe fitting (102), and the upper pipe fitting (101) is located at the upper end of the lower pipe fitting (102), the butt joint structure comprises a fixed connecting block (34), a rotating limiting block (35) is rotationally installed inside the fixed connecting block (34), and the rotating limiting block (35) and the fixed connecting block (34) are provided with six groups at equal angles about the upper pipe fitting (101).

10. An apparatus for the exploitation of natural gas under water according to claim 9, characterized in that: The butt joint structure further comprises a threaded rotating cylinder (36), and the threaded rotating cylinder (36) is rotationally installed outside the upper end of the lower pipe fitting (102) and the upper pipe fitting (101), and the outer side of the threaded rotating cylinder (36) is provided with rotating handle rods (37) at equal angles, and the upper end of the threaded rotating cylinder (36) is located outside the fixed connecting block (34).

Images