CN112781806A

CN112781806A - Pipeline air tightness detection device for offshore wind power generation

Info

Publication number: CN112781806A
Application number: CN202110108271.9A
Authority: CN
Inventors: 叶本栋; 昝亮亮
Original assignee: Hebei Haoyu Electromechanical Equipment Research Institute Co ltd
Current assignee: Hebei Haoyu Electromechanical Equipment Research Institute Co ltd
Priority date: 2021-01-27
Filing date: 2021-01-27
Publication date: 2021-05-11

Abstract

The invention relates to the technical field of pipeline detection for wind power generation, in particular to a pipeline air tightness detection device for offshore wind power generation, which can conveniently detect the air tightness of a pipeline, improve the operation portability of the pipeline, conveniently detect the continuity and improve the practicability; including the rotation axis, the multiunit mount, the multiunit arc support, the spacing of multiunit arc, the multiunit is dialled and is moved the frame, the spacing spring of multiunit, two sets of support frames, a pedestal, including a motor, an end cap, a controller, and a cover plate, the speed reducer, the transmission shaft, first conical gear, second conical gear and leakproofness detection mechanism, the motor is installed at speed reducer input department, the transmission shaft both ends are connected with first conical gear and speed reducer output respectively, second conical gear and pivot joint, and first conical gear and second conical gear meshing, leakproofness detection mechanism sets up in base top region, be provided with two sets of supplementary guiding mechanism on the base, two sets of supplementary guiding mechanism are located the top and the below region of.

Description

Pipeline air tightness detection device for offshore wind power generation

Technical Field

The invention relates to the technical field of pipeline detection for wind power generation, in particular to a pipeline air-tightness detection device for offshore wind power generation.

Background

As is known, wind power generation is the fastest-developing green energy technology in the world, people pay attention to some limitations on land wind energy utilization such as large occupied area, noise pollution and the like while the land wind power field is built and rapidly developed, due to abundant wind energy resources on the sea and feasibility of the current technology, the sea becomes a rapidly-developing wind power market, the sea area within 50m of water depth of the east coastal area of China is wide, and is very close to a power load center (a coastal economically-developed power shortage area), as the offshore wind power field technology is developed and matured, wind power can certainly become an important energy source for sustainable development of the east coastal area of China, as the offshore wind power generation is rapidly developed, various internal system structures are more and more perfect, in order to improve the working efficiency of the offshore wind power generation and keep the internal temperature constant, need set up pipe-line system in equipment inside for the transportation various media, therefore, the leakproofness of pipeline is then very important, in order to improve the follow-up use accuracy of pipeline, need in pipeline production process, detect the leakproofness of pipeline, generally detect it, generally with its sealed back dip into aquatic, or to wherein leading to water and ventilating, observe and detect it and have the leakage, but its operation portability is relatively poor, inconvenient continuity detection carries out simultaneously to lead to its practicality relatively poor.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides the pipeline air tightness detection equipment for offshore wind power generation, which can conveniently detect the air tightness of the pipeline, improve the operation portability, conveniently detect the continuity and improve the practicability.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: a pipeline air tightness detection device for offshore wind power generation comprises a rotating shaft, a plurality of groups of fixing frames, a plurality of groups of arc-shaped supports, a plurality of groups of arc-shaped limiting frames, a plurality of groups of stirring frames, a plurality of groups of limiting springs, two groups of supporting frames, a base, a motor, a speed reducer, a transmission shaft, a first bevel gear, a second bevel gear and a tightness detection mechanism, wherein the two groups of supporting frames are arranged on the base, two ends of the rotating shaft respectively penetrate through the two groups of supporting frames, the rotating shaft is rotatably connected with the two groups of supporting frames, the plurality of groups of fixing frames are respectively arranged in the left half area and the right half area of the rotating shaft, the plurality of groups of fixing frames are respectively connected with the plurality of groups of arc-shaped supports, a plurality of groups of accommodating grooves and a plurality of groups, and spacing with the spacing spring contact of multiunit arc respectively of multiunit arc, the spacing other end of multiunit arc inserts respectively to the multiunit slot in, the multiunit is dialled a both ends and is put up fixed connection with the spacing of multiunit arc respectively, the motor is installed at speed reducer input department, the speed reducer is installed on the base, the transmission shaft both ends are connected with first conical gear and speed reducer output respectively, second conical gear and swivelling joint to first conical gear and second conical gear meshing, leakproofness detection mechanism sets up in base top region, be provided with two sets of supplementary guiding mechanism on the base, two sets of supplementary guiding mechanism are located the top and the below region of rotation axis respectively.

Specifically, leakproofness detection mechanism includes two sets of mounting brackets, two sets of cylinders, two sets of telescopic links, two sets of removal framves, two sets of removal pipes, two sets of sealing interface, two sets of supporting seats, feed liquor pipe and drain pipe, two sets of mounting brackets are all installed on the base, two sets of cylinders are installed respectively on two sets of mounting brackets, two sets of telescopic link both ends are connected with two sets of removal framves and two sets of cylinder output ends respectively, be provided with two sets of mounting holes on two sets of removal framves respectively, two sets of sealing joint install respectively in two sets of mounting holes department, two sets of removal pipes communicate with two sets of sealing interface respectively, two sets of supporting seats are all installed on the base, feed liquor pipe and drain pipe are installed respectively on two sets of supporting seats to all be provided with the pressure.

The novel discharging device comprises a discharging plate, and is characterized by further comprising two sets of supporting legs and a discharging plate, wherein the two ends of each supporting leg are connected with the discharging plate and the base respectively, and the discharging plate is provided with a cushion pad.

Specifically, each auxiliary adjusting mechanism of the two groups of auxiliary adjusting mechanisms comprises a positioning block, a supporting shaft, a rotating pipe, a rotating gear, a movable threaded rod, a positioning frame, a movable clamping ring, a connecting frame, a fixing block and a guide rod, the connecting frame is elastically connected with the top of the base, two ends of the supporting shaft are respectively connected with the positioning block and the connecting frame, the positioning block is provided with a through hole, the rotating pipe passes through the through hole and is rotatably connected with the inner wall of the through hole, the movable threaded rod is screwed through the rotating pipe, a hook is arranged on the movable threaded rod, the rotary gear is sleeved and fixed on the rotary pipe, the positioning frame is arranged on the movable threaded rod, and the locating rack is connected with the movable clamping ring, the guide rod is installed at the bottom of the connecting rack through the fixing block, the movable clamping ring is clamped on the guide rod, and the movable clamping ring can move along the guide rod.

Specifically, each of the two sets of auxiliary adjusting mechanisms further comprises a driving motor, an output shaft, a transmission gear and a transmission chain, the driving motor is mounted on the connecting frame, two ends of the output shaft are respectively connected with the output ends of the transmission gear and the driving motor, and the transmission gear and the rotating gear are in transmission connection through the transmission chain.

The movable clamping ring is characterized by further comprising a plurality of groups of steel balls, a plurality of groups of arc-shaped grooves are formed in the inner wall of the movable clamping ring, the plurality of groups of steel balls are respectively located in the plurality of groups of arc-shaped grooves, and the plurality of groups of steel balls are all in contact with the outer wall of the guide rod.

The movable type combined type electric car is characterized by comprising a limiting rod, two sets of movable rods and two sets of movable rings, wherein the two ends of each set of movable rods are respectively connected with the two sets of movable frames and the two sets of movable rings, a limiting groove is formed in the base, the two sets of movable rings are located in the limiting groove, and the two ends of each limiting rod respectively penetrate through the two sets of movable rings and are fixedly connected with the inner wall of the limiting groove.

The movable ring comprises two movable rings and is characterized by further comprising two groups of buffer rings, wherein the two groups of buffer rings are respectively arranged on the inner walls of the two movable rings, and the two groups of buffer rings are in contact with the limiting rod.

(III) advantageous effects

Compared with the prior art, the invention provides a pipeline air tightness detection device for offshore wind power generation, which has the following beneficial effects: the assembled pipeline to be detected is placed on the arc-shaped bracket, the poking frame is released, the arc-shaped limiting frames are reset under the action of the elastic force of the limiting springs, the end parts of the arc-shaped limiting frames are inserted into the slots, the pipe is limited on the arc-shaped bracket, the motor is electrified and started, the transmission shaft drives the first bevel gear to rotate after the power output by the motor is reduced through the speed reducer, the rotating shaft drives the pipeline to rotate due to the meshing of the first bevel gear and the second bevel gear, so that the pipeline continuously rotates, when the pipeline rotates for each angle, the pipeline stops, the pipeline close to the sealing detection mechanism is detected through the sealing detection mechanism, continue to rotate after detecting the completion to can conveniently detect the gas tightness of pipeline, improve its operation portability, and can conveniently carry out the continuity and detect, improve the practicality, and repeat the initial operation, will detect the pipeline after the completion and take off and change the pipeline that new needs detected can.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the auxiliary adjustment mechanism of the present invention;

FIG. 3 is a schematic view of another embodiment of the auxiliary adjustment mechanism of the present invention;

FIG. 4 is a schematic view of the cooperation of the travel bar, travel ring and bumper ring;

FIG. 5 is a schematic view of the engagement of the steel ball, the moving collar and the guide bar;

FIG. 6 is a schematic view of the engagement of the legs and stripper plate;

FIG. 7 is a schematic view of the combination of the arc bracket, the arc spacing bracket and the spacing spring;

in the drawings, the reference numbers: 1. a rotating shaft; 2. a fixed mount; 3. an arc-shaped bracket; 4. an arc-shaped limiting frame; 5. a toggle frame; 6. a limiting spring; 7. a support frame; 8. a base; 9. a motor; 10. a speed reducer; 11. a drive shaft; 12. a first bevel gear; 13. a second bevel gear; 14. a mounting frame; 15. a cylinder; 16. a telescopic rod; 17. a movable frame; 18. moving the tube; 19. sealing the interface; 20. a supporting seat; 21. a liquid inlet pipe; 22. a liquid outlet pipe; 23. a pressure detector; 24. a support leg; 25. a stripper plate; 26. a cushion pad; 27. positioning blocks; 28. a support shaft; 29. rotating the tube; 30. a rotating gear; 31. moving the threaded rod; 32. a positioning frame; 33. moving the snap ring; 34. a connecting frame; 35. a fixed block; 36. a guide bar; 37. hooking; 38. a drive motor; 39. an output shaft; 40. a transmission gear; 41. a drive chain; 42. steel balls; 43. a limiting rod; 44. a travel bar; 45. a moving ring; 46. and a buffer ring.

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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, a pipeline air-tightness detecting device for offshore wind power generation comprises a rotating shaft 1, a plurality of sets of fixing frames 2, a plurality of sets of arc-shaped supports 3, a plurality of sets of arc-shaped limiting frames 4, a plurality of sets of stirring frames 5, a plurality of sets of limiting springs 6, two sets of supporting frames 7, a base 8, a motor 9, a speed reducer 10, a transmission shaft 11, a first conical gear 12, a second conical gear 13 and a tightness detecting mechanism, wherein the two sets of supporting frames 7 are all installed on the base 8, two ends of the rotating shaft 1 respectively penetrate through the two sets of supporting frames 7, the rotating shaft 1 is rotatably connected with the two sets of supporting frames 7, the plurality of sets of fixing frames 2 are respectively installed in the left half area and the right half area of the rotating shaft 1, the plurality of sets of fixing frames 2 are respectively connected with the plurality of sets, the spacing 4 one end of multiunit arc inserts respectively in organizing the holding tank to the most, and the spacing 4 of multiunit arc contacts with the spacing spring 6 of multiunit respectively, the spacing 4 other ends of multiunit arc insert respectively in organizing the slot to the most, 5 both ends of multiunit stirring frame are respectively with the spacing 4 fixed connection of multiunit arc, motor 9 is installed at speed reducer 10 input end department, speed reducer 10 is installed on base 8, 11 both ends of transmission shaft are connected with first conical tooth wheel 12 and speed reducer 10 output respectively, second conical tooth wheel 13 is connected with rotation axis 1, and first conical tooth wheel 12 meshes with second conical tooth wheel 13, leakproofness detection mechanism sets up in base 8 top region, be provided with two sets of supplementary guiding mechanism on base 8, two sets of supplementary guiding mechanism are located rotation axis 1's top and below region respectively.

The plurality of groups of arc-shaped limiting frames 4 respectively enter into the plurality of groups of accommodating grooves by pulling the plurality of groups of poking frames 5, and compress the plurality of groups of limiting springs 6, at the moment, an opening is formed in the upper area of the arc-shaped support 3, the installed pipeline to be detected is placed on the arc-shaped support 3, the poking frames 5 are released, the plurality of groups of arc-shaped limiting frames 4 are reset under the elastic action of the limiting springs 6, the end parts of the arc-shaped limiting frames are inserted into the slots, the pipe is limited on the arc-shaped support 3, the motor 9 is electrified and started, after the power output by the motor 9 is decelerated through the speed reducer 10, the transmission shaft 11 drives the first conical gear 12 to rotate, as the first conical gear 12 is meshed with the second conical gear 13, the rotating shaft 1 can drive the pipeline to rotate, so that the pipeline rotates continuously, when the pipeline rotates by one angle, the pipeline stops, and the pipeline close, detect through leakproofness detection mechanism, continue to rotate after detecting the completion to can conveniently detect the gas tightness of pipeline, improve its operation portability, and can conveniently carry out the continuity and detect, improve the practicality, and repeat the initial operation, the pipeline that will detect after the completion takes off and the pipeline that needs the detection of renewal can.

Specifically, leakproofness detection mechanism includes two sets of mounting brackets 14, two sets of cylinders 15, two sets of telescopic links 16, two sets of removal frame 17, two sets of removal pipe 18, two sets of seal interface 19, two sets of supporting seats 20, feed liquor pipe 21 and drain pipe 22, two sets of mounting brackets 14 are all installed on base 8, two sets of cylinders 15 are installed respectively on two sets of mounting

brackets

14, 16 both ends of two sets of telescopic links are connected with two sets of removal frame 17 and the 15 output ends of two sets of cylinders respectively, be provided with two sets of mounting holes on two sets of removal frame 17 respectively, two sets of seal interface install respectively in two sets of mounting holes, two sets of removal pipe 18 communicate with two sets of seal interface 19 respectively, two sets of supporting seats 20 are all installed on base 8, feed liquor pipe 21 and drain pipe 22 are installed respectively on two sets of supporting seats 20, and all be provided with pressure.

When examining the gas tightness to the pipeline, firstly, stop the motion of pipeline, two sets of sealed interface 19 are aimed at respectively at the pipeline both ends this moment, control two sets of cylinders 15 work, two sets of cylinders 15 drive two sets of sealed interface 19 motion and stretch into both ends through two sets of telescopic links 16, make two sets of removal pipes 18 and pipeline both ends indirect sealing, can be through the leading-in high-pressure liquid of feed liquor pipe 21 or gas this moment, liquid or gas flow through two sets of removal pipes 18 and the pipeline that detects, and discharge through drain pipe 22, can detect whether the registration of meter 23 is the same through observing two pressures, perhaps between observe whether take place the leakage condition on the pipeline body, thereby can conveniently detect the gas tightness to the pipeline.

Specifically, still include two sets of landing legs 24 and stripper 25, two sets of landing legs 24 both ends are connected with stripper 25 and base 8 respectively, are provided with blotter 26 on the stripper 25.

When the pipe is removed from the curved support 3, it can be discharged along the discharge plate 25 and the wear therebetween can be reduced by the cushion 26.

Specifically, each auxiliary adjusting mechanism of the two groups of auxiliary adjusting mechanisms comprises a positioning block 27, a supporting shaft 28, a rotating pipe 29, a rotating gear 30, a moving threaded rod 31, a positioning frame 32, a moving snap ring 33, a connecting frame 34, a fixing block 35 and a guide rod 36, wherein the connecting frame is elastically connected with the top of the base, two ends of the supporting shaft 28 are respectively connected with the positioning block 27 and the connecting frame 34, a through hole is formed in the positioning block 27, the rotating pipe 29 penetrates through the through hole and is rotatably connected with the inner wall of the through hole, the moving threaded rod 31 is screwed through the rotating pipe 29, a hook 37 is arranged on the moving threaded rod 31, the rotating gear 30 is sleeved and fixed on the rotating pipe 29, the positioning frame 32 is installed on the moving threaded rod 31, the positioning frame 32 is connected with the moving snap ring 33, the guide rod 36 is installed at the bottom of the connecting frame 34 through the fixing, and the moving snap ring 33 can move along the guide bar 36.

When carrying out the material loading and unloading to the pipeline, can rotate through two sets of rotary gear 30 of external drive equipment control, thereby make rotatory pipe 29 rotate, make movable threaded rod 31 carry out the back-and-forth movement along rotatory pipe 29, make things convenient for control couple 37 to catch on stirring frame 5, thereby can conveniently stir the spacing 4 of arc rather than being connected, the pipeline that conveniently will wait to detect is put into to arc support 3, and can conveniently make the automatic whereabouts of pipeline after the detection and separate with arc support 3, and drop and unload on stripper 25, when movable threaded rod 31 removes, can conveniently inject its position through the removal of arc snap ring along guide bar 36, avoid movable threaded rod 31 along with rotatory pipe 29 together rotates. Wherein the hooks of the two groups of auxiliary adjusting mechanisms are oppositely arranged.

Specifically, each of the two sets of auxiliary adjusting mechanisms further includes a driving motor 38, an output shaft 39, a transmission gear 40 and a transmission chain 41, the driving motor 38 is mounted on the connecting frame 34, two ends of the output shaft 39 are respectively connected with the output ends of the transmission gear 40 and the driving motor 38, and the transmission gear 40 and the rotating gear 30 are in transmission connection through the transmission chain 41.

When the rotary gear 30 needs to be driven to rotate by an external driving device, the driving motor 38 can be powered on and started, the power output by the driving motor 38 drives the transmission gear 40 to rotate through the output shaft 39, and the rotary gear 30 is driven to rotate through the transmission action of the transmission chain 41.

Specifically, still include multiunit steel ball 42, be provided with multiunit arc wall on the removal snap ring 33 inner wall, multiunit steel ball 42 is arranged in multiunit arc wall respectively to multiunit steel ball 42 all contacts with guide bar 36 outer wall.

When the movable snap ring 33 moves along the guide bar 36, the friction force between the plurality of sets of steel balls 42 can be reduced by rolling, thereby facilitating the movement of the movable snap ring 33.

Specifically, still include gag lever post 43, two sets of carriage release levers 44 and two sets of shift rings 45, two sets of carriage release levers 44 both ends are connected with two sets of carriage release levers 32 and two sets of shift rings 45 respectively, have seted up the spacing groove on the base 8, and two sets of shift rings 45 all are located the spacing groove, and two sets of shift rings 45 and spacing inslot wall fixed connection are passed respectively at gag lever post 43 both ends.

When the positions of the two groups of moving frames 17 are adjusted through the air cylinder 15, the moving directions of the two groups of moving frames 17 can be conveniently limited through the movement of the two groups of moving rings 45 along the moving limiting rod 43, and the dislocation between the moving frames and the pipeline is avoided

Specifically, the device further comprises two groups of buffer rings 46, wherein the two groups of buffer rings 46 are respectively installed on the inner walls of the two groups of moving rings 45, and the two groups of buffer rings 46 are both in contact with the limiting rod 43.

When the two sets of moving rings 45 move along the limiting rod 43, the abrasion between the two sets of buffer rings 46 can be reduced, the moving stability can be improved, and the shaking of the moving rings 45 can be reduced.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The electrical components presented in the document are all electrically connected with an external master controller and 220V mains, and the master controller can be a conventional known device controlled by a computer or the like.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The pipeline air-tightness detection device for offshore wind power generation is characterized by comprising a rotating shaft (1), a plurality of groups of fixing frames (2), a plurality of groups of arc-shaped supports (3), a plurality of groups of arc-shaped limiting frames (4), a plurality of groups of stirring frames (5), a plurality of groups of limiting springs (6), two groups of supporting frames (7), a base (8), a motor (9), a speed reducer (10), a transmission shaft (11), a first bevel gear (12), a second bevel gear (13) and a tightness detection mechanism, wherein the two groups of supporting frames (7) are arranged on the base (8), two ends of the rotating shaft (1) respectively penetrate through the two groups of supporting frames (7), the rotating shaft (1) is rotatably connected with the two groups of supporting frames (7), the plurality of groups of fixing frames (2) are respectively arranged in the left half area and the right half area of the rotating shaft (1), and the plurality of groups of, the multi-group arc support (3) is respectively provided with a plurality of groups of accommodating grooves and a plurality of groups of slots, a plurality of groups of limiting springs (6) are respectively positioned in the plurality of groups of accommodating grooves, one end of the plurality of groups of arc limiting frames (4) are respectively inserted into the plurality of groups of accommodating grooves, the plurality of groups of arc limiting frames (4) are respectively contacted with the plurality of groups of limiting springs (6), the other end of the plurality of groups of arc limiting frames (4) are respectively inserted into the plurality of groups of slots, two ends of the multi-group stirring frame (5) are respectively fixedly connected with the plurality of groups of arc limiting frames (4), the motor (9) is arranged at the input end of the speed reducer (10), the speed reducer (10) is arranged on the base (8), two ends of the transmission shaft (11) are respectively connected with the output ends of the first bevel gear (12) and the output end of the speed reducer (10), the second bevel gear (13) is, the tightness detection mechanism is arranged above the base (8) in an area, two groups of auxiliary adjusting mechanisms are arranged on the base (8), and the two groups of auxiliary adjusting mechanisms are respectively positioned above and below the rotating shaft (1).

2. The pipeline air-tightness detection device for offshore wind power generation according to claim 1, wherein the tightness detection mechanism comprises two sets of mounting frames (14), two sets of cylinders (15), two sets of telescopic rods (16), two sets of moving frames (17), two sets of moving pipes (18), two sets of sealing interfaces (19), two sets of supporting seats (20), a liquid inlet pipe (21) and a liquid outlet pipe (22), the two sets of mounting frames (14) are mounted on the base (8), the two sets of cylinders (15) are respectively mounted on the two sets of mounting frames (14), two ends of the two sets of telescopic rods (16) are respectively connected with two sets of moving frames (17) and two outputs of the two sets of cylinders (15), the two sets of moving frames (17) are respectively provided with two sets of mounting holes, the two sets of sealing interfaces are respectively mounted at the two sets of mounting holes, the two sets of moving pipes (18) are respectively communicated with the two sets of sealing, the two groups of supporting seats (20) are arranged on the base (8), the liquid inlet pipe (21) and the liquid outlet pipe (22) are respectively arranged on the two groups of supporting seats (20), and pressure detectors (23) are arranged on the liquid inlet pipe (21) and the liquid outlet pipe (22).

3. The offshore wind turbine pipeline airtightness detection apparatus according to claim 1, further comprising two sets of legs (24) and a stripper plate (25), wherein the two sets of legs (24) are connected at both ends thereof to the stripper plate (25) and the base (8), respectively, and a cushion pad (26) is disposed on the stripper plate (25).

4. The offshore wind turbine pipeline airtightness detection apparatus according to claim 1, wherein each of the two sets of auxiliary adjustment mechanisms comprises a positioning block (27), a support shaft (28), a rotary pipe (29), a rotary gear (30), a movable threaded rod (31), a positioning frame (32), a movable snap ring (33), a connecting frame (34), a fixing block (35) and a guide rod (36), the connecting frame is elastically connected to the top of the base, two ends of the support shaft (28) are respectively connected to the positioning block (27) and the connecting frame (34), a through hole is provided on the positioning block (27), the rotary pipe (29) passes through the through hole and is rotatably connected to the inner wall of the through hole, the movable threaded rod (31) is screwed through the rotary pipe (29), a hook (37) is provided on the movable threaded rod (31), the rotary gear (30) is fixed to the rotary pipe (29) in a sleeved manner, the positioning frame (32) is installed on the movable threaded rod (31), the positioning frame (32) is connected with the movable clamping ring (33), the guide rod (36) is installed at the bottom of the connecting frame (34) through the fixing block (35), the movable clamping ring (33) is clamped on the guide rod (36), and the movable clamping ring (33) can move along the guide rod (36).

5. The pipeline airtightness detection apparatus for offshore wind power generation according to claim 4, wherein each of the two sets of auxiliary adjustment mechanisms further comprises a driving motor (38), an output shaft (39), a transmission gear (40) and a transmission chain (41), the driving motor (38) is mounted on the connecting frame (34), two ends of the output shaft (39) are respectively connected with the output ends of the transmission gear (40) and the driving motor (38), and the transmission gear (40) and the rotary gear (30) are in transmission connection through the transmission chain (41).

6. The pipeline airtightness detection apparatus for offshore wind power generation according to claim 4, further comprising a plurality of sets of steel balls (42), wherein a plurality of sets of arc-shaped grooves are provided on the inner wall of the movable snap ring (33), the plurality of sets of steel balls (42) are respectively located in the plurality of sets of arc-shaped grooves, and the plurality of sets of steel balls (42) are all in contact with the outer wall of the guide rod (36).

7. The pipeline air-tightness detection device for offshore wind power generation according to claim 1, further comprising a limiting rod (43), two sets of moving rods (44) and two sets of moving rings (45), wherein two ends of the two sets of moving rods (44) are respectively connected with the two sets of moving frames (17) and the two sets of moving rings (45), a limiting groove is formed in the base (8), the two sets of moving rings (45) are both located in the limiting groove, and two ends of the limiting rod (43) respectively penetrate through the two sets of moving rings (45) and are fixedly connected with the inner wall of the limiting groove.

8. The offshore wind turbine pipeline airtightness detection apparatus according to claim 7, further comprising two sets of buffer rings (46), wherein the two sets of buffer rings (46) are respectively mounted on inner walls of the two sets of moving rings (45), and both sets of buffer rings (46) are in contact with the stopper rod (43).