Connecting device for deep sea natural gas conveying pipeline

Abstract

The invention relates to the technical field of natural gas pipelines, in particular to a deep sea natural gas conveying pipeline connecting device which comprises two pipe bodies, flange plates are fixed to the ends of the two pipe bodies, and the deep sea natural gas conveying pipeline connecting device further comprises a first connecting ring and a second connecting ring which are fixed to the ends of the two pipe bodies correspondingly. The inner side of each cavity is slidably provided with a clamping block capable of moving towards the outer side of the cavity through a pushing mechanism. The driving mechanism drives the multiple screws to rotate, the multiple screws drive the multiple sliding blocks to move horizontally, the sliding blocks move through sliding fit between the chutes and the sliding pins, the multiple clamping blocks are driven to be synchronously combined to move and clamped to the outer sides of the two flange plates, and the two flange plates are clamped and fixed; when the pipe body is subjected to seawater pressure and seawater impact in the deep sea, the clamping blocks with higher strength are not prone to deformation, so that a tiny gap is prevented from being generated between the two flange plates, and the sealing performance between the two flange plates is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of natural gas pipelines, and in particular to a deep-sea natural gas transmission pipeline connecting device. Background Art

[0002] A natural gas pipeline is a pipeline that transports natural gas from extraction sites or processing plants to urban gas distribution centers or industrial enterprise users. Deep-sea natural gas pipelines are used to transport natural gas extracted from submarine natural gas fields to land or other processing facilities. For long-distance transportation, multiple sections of natural gas pipelines need to be connected to form a longer pipeline.

[0003] The existing method for connecting pipes is usually to weld fixed flanges at both ends of the pipes. When connecting, the flanges at the ends of the two pipes are aligned close to each other, and then the two flanges are fixed by bolts to connect the two pipes.

[0004] However, this pipeline connection method is not reliable enough for natural gas transmission pipelines installed in the deep sea during long-term use. Since deep-sea natural gas pipelines on the seabed not only need to withstand the external pressure of seawater and the pressure of internal natural gas, but are also affected by the impact of submarine undercurrents, the undercurrents will produce irregular impact forces on the pipelines, causing the pipeline connection parts to be continuously pulled and twisted in the horizontal and vertical directions. As a result, the fixing bolts of the flanges will be subjected to great pulling force, aggravating the fatigue and deformation of the bolts. If the bolts are deformed or fatigued, small gaps will be generated between the flanges, thereby reducing the sealing performance between the pipelines. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides a deep-sea natural gas transmission pipeline connection device, which solves the problem that under the impact of undercurrents in deep-sea environments, bolts become deformed and loose, thereby reducing the sealing performance between flanges.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A deep-sea natural gas transmission pipeline connection device includes two pipe bodies, each end of which is fixed with a flange, and also includes a connecting ring 1 and a connecting ring 2 respectively fixed to the ends of the two pipe bodies, the connecting ring 1 having a plurality of cavities formed therein, the inner side of each of the cavities is provided with a clamping block that can be moved toward the outside of the cavity by a pushing mechanism, and one end of each clamping block is provided with an opening for pressing the two flanges; the pushing mechanism includes an inclined groove formed in the clamping block, a slider slidably provided in the inner side of the cavity, and a sliding pin movably adapted to the inner side of the inclined groove provided on the outer side of the slider; and also includes a driving mechanism for driving the plurality of sliders to move horizontally; the driving mechanism includes a screw that is rotatably connected to the inner side of the cavity and a gear transmission mechanism that drives the screw to rotate, the screw being rotatably connected to the interior of the slider by a thread, and the gear transmission mechanism including a gear fixed to one end of the screw, an outer gear ring rotatably provided in the connecting ring 1 and meshing with the gear, and a worm gear mechanism that drives the outer gear ring to rotate.

[0007] Furthermore, an annular groove is provided at one end of the connecting ring 1, and the outer gear ring is rotatably connected to the inner side of the annular groove. The worm gear mechanism includes a worm wheel fixed to one end of the outer gear ring and rotatably engaged with the inner side of the annular groove, and a worm shaft rotatably inserted into the inner side of the annular groove. A worm meshing with the worm wheel is fixed to the outer side of the worm shaft, and a locking mechanism for locking the worm shaft is provided on the outer side of the connecting ring 1.

[0008] Furthermore, the locking mechanism includes a locking tube fixed to an outer side of the connecting ring and rotatably adapted to the outer end of the worm shaft, a rotating disk and a hexagonal rotating block slidably sleeved on the outer end of the worm shaft and fixed to each other, an outer groove is provided on the outer side of the rotating disk, a plurality of pawls are rotatably provided on the inner side of the outer groove, a countersunk hole is provided at the inner end of the locking tube, a plurality of locking teeth are provided on the inner side of the countersunk hole near the port, and the cross-section of each locking tooth is a right-angled trapezoidal structure.

[0009] Furthermore, one end of the rotating disk is connected to a limit spring, and one end of the limit spring is rotatably connected to the inner bottom end of the countersunk hole through a thrust bearing.

[0010] Furthermore, each of the pawls is rotatably connected to the inner side of the outer groove via a pin shaft, a flange is fixed to one end of each of the pin shafts, and one end of each of the flanges is elastically connected to the outer side of the rotating disk via a torsion spring.

[0011] Furthermore, a plurality of stoppers for limiting the hexagonal rotating block are fixed to one outer end of the worm shaft.

[0012] Furthermore, two horizontal grooves are provided at both ends of the inclined groove, and one end of the two horizontal grooves is smoothly connected to the two ends of the inclined groove respectively.

[0013] Furthermore, a pressure sealing mechanism is provided inside the connecting ring 2, and the pressure sealing mechanism includes an annular cavity opened inside the connecting ring 2, an annular slide is slidingly provided on the inner side of the annular cavity, one end of the annular slide is fixed with an annular slide extending to the outside of the connecting ring 2, and one end of the annular slide is fixed with a sealing pressure plate aligned with one end of the connecting ring, and the inside of the annular cavity is connected to the outside through a plurality of connecting holes opened at one end of the connecting ring 2.

[0014] Furthermore, a plurality of radial positioning mechanisms are provided inside the connecting ring 1, and the radial positioning mechanisms include a spring cavity opened inside the connecting ring 1, an insert block fixed at a position corresponding to the spring cavity on the inner side of the connecting ring 1, and positioning holes opened at positions corresponding to the spring cavity on the inner side of the two flanges. A push plate is slidably connected to the inner side of the spring cavity, one end of the push plate is elastically connected to the inner end of the spring cavity through a positioning spring, and a positioning insert rod passing through the positioning hole is fixed to the other end of the push plate.

[0015] Furthermore, a guide groove is provided at one end of each clamping block, and each sliding block is slidably fitted into the inner side of the guide groove at a corresponding position.

[0016] The present invention has the following beneficial effects: (1) The deep-sea natural gas transmission pipeline connection device drives the outer gear ring and gear in the driving mechanism to rotate through the worm gear mechanism, thereby driving multiple screws to rotate, and the multiple screws drive multiple sliders to move horizontally. The sliders move through the sliding fit between the inclined groove and the sliding pin, driving multiple clamps to move synchronously and be clamped on the outside of the two flanges, clamping and fixing the two flanges, thereby improving the reliability of the fixation. When the pipe body is subjected to seawater pressure and seawater impact in the deep sea, the stronger clamps are not easy to deform, so that the two flanges are always tightly fitted, thereby avoiding the formation of a small gap between the two flanges, thereby reducing the squeezing of the sealing ring between the two flanges by the uneven seawater pressure, and ensuring the sealing performance between the two flanges.

[0017] (2) The deep-sea natural gas transmission pipeline connection device uses a pressure sealing mechanism to make the sealing pressure plate therein press against the end plate 1 at one end of the connecting ring 1 under the action of seawater pressure, and plays a sealing role through the sealing gasket between the two. Therefore, a sealing space is formed between the connecting ring 1 and the connecting ring 2 through the pressure sealing mechanism. The two flanges are located in the sealing space. The pressure of the external seawater first acts on the sealing gasket between the sealing pressure plate and the end plate 1. Therefore, the seawater pressure on the sealing ring between the two flanges can be greatly reduced, thereby reducing the aging of the sealing ring between the two flanges, thereby further improving the sealing performance between the two flanges.

[0018] (3) The deep-sea natural gas transmission pipeline connection device can prevent the worm shaft in the worm gear mechanism from rotating in the opposite direction through the locking mechanism, thereby preventing the worm and worm gear from rotating in the opposite direction, thereby preventing multiple screws from rotating in the opposite direction, and preventing multiple clamping blocks from moving in the opposite direction, so that multiple clamping blocks can always be stuck on the outside of the two flanges, continuously clamping and fixing the two flanges, thereby improving the connection reliability of the two pipe bodies.

[0019] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the structure inside the connecting ring 1 of the present invention; Figure 3 Schematic diagram of the first cross-sectional structure of the connecting ring 1 in the present invention; Figure 4 For the present invention Figure 3 Schematic diagram of the enlarged structure at A in the middle; Figure 5 For the present invention Figure 4 Schematic diagram of the enlarged structure at B in the middle; Figure 6 2 is a schematic diagram of a second cross-sectional structure of the connecting ring 1 in the present invention; Figure 7 For the present invention Figure 6 Schematic diagram of the enlarged structure at C in the middle; Figure 8 Schematic diagram of the cross-sectional structure of the connecting ring 1 and the connecting ring 2 in the present invention; Figure 9 For the present invention Figure 8 Schematic diagram of the enlarged structure at D in the middle; Figure 10 This is a structural diagram of the present invention in which the clamping block is clamped on the outer sides of two flanges; Figure 11It is a schematic diagram of the disassembled structure of the clamping block and the sliding block in the present invention.

[0021] In the figure, 1, tube body; 2, flange; 3, connecting ring 1; 4, connecting ring 2; 5, cavity; 6, clamping block; 7, end plate 1; 8, end plate 2; 9, sealing gasket; 10, locking tube; 11, annular groove; 12, opening; 13, guide groove; 101, slider; 102, inclined groove; 103, sliding pin; 104, screw; 105, outer gear ring; 106, gear; 107, worm; 108, worm wheel; 109, worm shaft; 110, guide rod; 111, horizontal groove; 201, annular cavity; 202, annular slide ; 203, annular slide; 204, sealing pressure plate; 205, connecting hole; 301, spring chamber; 302, push plate; 303, positioning spring; 304, positioning plug rod; 305, plug block; 306, positioning hole; 401, rotating disk; 402, hexagonal rotating block; 403, outer groove; 404, pin; 405, pawl; 406, locking tooth; 407, limit spring; 408, thrust bearing; 409, flange; 410, torsion spring; 411, block; 412, limit slide groove; 413, countersunk hole. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0024] The following is based on Figures 1-11 The invention describes a deep-sea natural gas transmission pipeline connection device provided by an embodiment of the invention.

[0025] See also Figures 1-11The embodiment of the present invention provides a technical solution: a deep-sea natural gas transmission pipeline connection device, comprising two pipe bodies 1, each end of which is fixed with a flange 2, and further comprising a connecting ring 1 3 and a connecting ring 2 4 respectively fixed to the ends of the two pipe bodies 1, wherein a plurality of cavities 5 are opened inside the connecting ring 1 3, and a clamping block 6 that can be moved toward the outside of the cavity 5 is slidably provided on the inner side of each cavity 5 by a pushing mechanism, and an opening 12 is opened at one end of each clamping block 6 for pressing the two flanges 2 tightly; the pushing mechanism comprises an inclined groove 102 opened inside the clamping block 6, a sliding block slidably provided inside the cavity 5, and a sliding block 6 that can be moved toward the outside of the cavity 5. Block 101, the outer side of the slider 101 is provided with a sliding pin 103 that movably adapts to the inner side of the inclined groove 102; it also includes a driving mechanism that drives multiple sliders 101 to move horizontally; the driving mechanism includes a screw 104 that is rotatably connected to the inner side of the cavity 5 and a gear transmission mechanism that drives the screw 104 to rotate, the screw 104 is rotatably connected to the inside of the slider 101 through a thread, and the gear transmission mechanism includes a gear 106 fixed to one end of the screw 104, an outer gear ring 105 that is rotatably set inside the connecting ring 3 and meshing with the gear 106, and a worm gear mechanism that drives the outer gear ring 105 to rotate.

[0026] Reference Figure 3 、 Figure 7 , an annular groove 11 is formed at one end of the connecting ring 1 3 , and the outer gear ring 105 is rotatably connected to the inner side of the annular groove 11 ; Preferably, the worm gear mechanism includes a worm wheel 108 fixed to one end of the outer gear ring 105 and rotatably engaged with the inner side of the annular groove 11, a worm shaft 109 rotatably inserted into the inner side of the annular groove 11, a worm 107 meshing with the worm wheel 108 is fixed to the outer side of the worm shaft 109, and a locking mechanism for locking the worm shaft 109 is provided on the outer side of the connecting ring 13; The worm gear mechanism is used to drive the outer gear ring 105 of the gear transmission mechanism to rotate. The worm gear mechanism has a large reduction ratio and only requires a small force to complete the connection between the pipes. In addition, the worm gear mechanism has a self-locking function, which can prevent the worm wheel 108 from rotating to a certain extent, thereby preventing the screw 104 from rotating, and further preventing the clamping block 6 from moving, thereby ensuring the firmness of the connection between the two flanges 2.

[0027] Preferably, the locking mechanism includes a locking tube 10 fixed to the outside of the connecting ring 3 and rotatably adapted to the outer end of the worm shaft 109, a rotating disk 401 and a hexagonal rotating block 402 slidably sleeved on the outer end of the worm shaft 109 and fixed to each other, an outer groove 403 is provided on the outer side of the rotating disk 401, and a plurality of ratchet claws 405 are rotatably provided on the inner side of the outer groove 403. A countersunk hole 413 is provided on the inner side of the locking tube 10 at one end, and a plurality of locking teeth 406 are provided on the inner side of the countersunk hole 413 near the port, and the cross-section of each locking tooth 406 is a right-angled trapezoidal structure. Through the locking mechanism, the worm shaft 109 in the worm gear mechanism can be prevented from rotating in the opposite direction, thereby preventing the worm 107 and the worm wheel 108 from rotating in the opposite direction, thereby preventing the multiple screws 104 from rotating in the opposite direction, and preventing the multiple clamping blocks 6 from moving in the opposite direction, so that the multiple clamping blocks 6 can always be stuck on the outside of the two flanges 2, continuously clamping and fixing the two flanges 2, and improving the connection reliability of the two pipe bodies 1.

[0028] Reference Figure 4 One end of the rotating disk 401 is connected to a limit spring 407, one end of the limit spring 407 is rotatably connected to the inner bottom end of the countersunk hole 413 through a thrust bearing 408, and a plurality of stoppers 411 for limiting the hexagonal rotating block 402 are fixed to the outer end of the worm shaft 109; The limit spring 407 always applies a thrust directed toward the port of the countersunk hole 413 to the rotating disk 401 and the hexagonal rotating block 402, so that one end of the hexagonal rotating block 402 is tightly attached to one side of the multiple blocks 411. Therefore, when the locking mechanism is not subjected to external force, the multiple pawls 405 always engage with the multiple locking teeth 406 located on the inner side of the countersunk hole 413 near the port position. At this time, the rotating disk 401 and the hexagonal rotating block 402 can only rotate clockwise and lock counterclockwise. This can prevent the worm shaft 109 from rotating in the opposite direction due to vibration caused by the impact of water flow in the deep sea. When disassembly is required, the rotating disk 401 and the hexagonal rotating block 402 are pressed to move them to the innermost end of the countersunk hole 413, and the limit spring 407 is compressed to separate the multiple pawls 405 from the multiple locking teeth 406. At this time, the rotating disk 401 and the hexagonal rotating block 402 can be rotated in both directions, so that the worm shaft 109 can be rotated counterclockwise for easy disassembly.

[0029] Reference Figure 4 A limiting groove 412 is provided at one end of the worm shaft 109, and a protrusion is fixed on the inner side of the hexagonal rotating block 402 which is slidably connected to the inner side of the limiting groove 412. Through the sliding cooperation between the protrusion and the limiting groove 412, the hexagonal rotating block 402 can slide along the outer side of the worm shaft 109. At the same time, when the hexagonal rotating block 402 is rotated, a torque can be applied to the worm shaft 109 through the protrusion and the limiting groove 412, thereby driving the worm shaft 109 to rotate.

[0030] Reference Figure 5 Each pawl 405 is rotatably connected to the inner side of the outer groove 403 via a pin 404 , one end of each pin 404 is fixed with a flange 409 , and one end of each flange 409 is elastically connected to the outer side of the rotating disk 401 via a torsion spring 410 ; Each pin 404 in the locking mechanism always has a certain torsional moment under the elastic force of the torsion spring 410. The pin 404 transmits the torsional moment to the pawl 405, so that one end of the pawl 405 is always fitted into the inner side of the countersunk hole 413. Since the cross-sections of the multiple locking teeth 406 are all right-angled trapezoidal structures, the rotating disk 401 can drive the multiple pawls 405 to rotate clockwise. Figure 4 As shown, when rotating counterclockwise, the multiple pawls 405 will press against the multiple locking teeth 406, thereby preventing the rotating disk 401 from rotating counterclockwise, and playing a one-way locking role.

[0031] Reference Figure 11 , two horizontal grooves 111 are provided at both ends of the inclined groove 102, and one end of the two horizontal grooves 111 is smoothly connected to the two ends of the inclined groove 102 respectively; When the clamping block 6 is fully extended, the sliding pin 103 slides from the inclined groove 102 into the inner side of a horizontal groove 111 at one end. At this time, under the action of the horizontal groove 111, the sliding pin 103 can be prevented from moving in the opposite direction, thereby preventing the clamping block 6 from moving in the opposite direction, so that the clamping block 6 can be stably clamped on the outer sides of the two flanges 2, further improving the connection stability of the two pipe bodies 1.

[0032] Preferably, a pressure sealing mechanism is provided inside the connecting ring 2 4. The pressure sealing mechanism includes an annular cavity 201 provided inside the connecting ring 2 4. An annular slide 202 is slidably provided inside the annular cavity 201. An annular slide 203 extending to the outside of the connecting ring 2 4 is fixed to one end of the annular slide 202. A sealing pressure plate 204 aligned with one end of the connecting ring 1 3 is fixed to one end of the annular slide 203. The interior of the annular cavity 201 is connected to the outside through a plurality of communication holes 205 provided at one end of the connecting ring 2 4. Through the pressure sealing mechanism, the sealing pressure plate 204 is pressed against the end plate 7 at one end of the connecting ring 3 under the action of seawater pressure, and a sealing effect is achieved through the sealing gasket 9 between the two. Therefore, a sealed space is formed between the connecting ring 1 3 and the connecting ring 2 4 through the pressure sealing mechanism. The two flanges 2 are located in the sealed space. The pressure of the external seawater first acts on the sealing gasket 9 between the sealing pressure plate 204 and the end plate 7. Therefore, the seawater pressure on the sealing ring between the two flanges 2 can be greatly reduced, thereby reducing the aging of the sealing ring between the two flanges 2, thereby further improving the sealing performance between the two flanges 2.

[0033] Preferably, a plurality of radial positioning mechanisms are provided inside the connecting ring 3, the radial positioning mechanisms including a spring cavity 301 provided inside the connecting ring 3, an insert block 305 fixed at a position on the inner side of the connecting ring 3 corresponding to the spring cavity 301, and positioning holes 306 provided inside the two flanges 2 at positions corresponding to the spring cavity 301. A push plate 302 is slidably connected to the inner side of the spring cavity 301, one end of the push plate 302 is elastically connected to one end of the inner side of the spring cavity 301 via a positioning spring 303, and a positioning insert rod 304 is fixed to the other end of the push plate 302 and passes through the positioning hole 306; When the connecting ring 1 3 and the connecting ring 2 4 are close to each other, the positioning rods 304 in the multiple radial positioning mechanisms located inside the connecting ring 1 3 are aligned with the positioning holes 306 on the flange 2. Under the elastic force of the multiple positioning springs 303, a thrust is applied to the push plate 302, and the push plate 302 pushes the positioning rods 304 to be inserted into the inner side of the positioning holes 306. When the positioning rods 304 in the multiple radial positioning mechanisms are all inserted into the inner sides of the positioning holes 306 at the corresponding positions, the two flanges 2 can be radially positioned, thereby radially positioning the two pipe bodies 1. The positioning rods 304 can be inserted into the insert block 305, which can increase the lateral thrust that the positioning rods 304 bear and avoid bending of the positioning rods 304, thereby providing stronger radial positioning stability for the two flanges 2, avoiding radial misalignment between the two flanges 2 caused by the impact and pressure of seawater on the pipe body 1, thereby preventing damage to the sealing ring between the two flanges 2, thereby ensuring the sealing performance between the two flanges 2 under high water pressure environment.

[0034] Reference Figure 11 , a guide groove 13 is provided at one end of each clamping block 6, and each slider 101 is slidably adapted to the inner side of the guide groove 13 at the corresponding position; The slider 101 slides along the inner side of the guide groove 13, and the inclined grooves 102 are respectively opened inside each clamping block 6 and located on both sides of the guide groove 13. In addition, two sliding pins 103 are provided on both sides of the slider 101. The two sliding pins 103 are movably adapted to the inner sides of the two inclined grooves 102 respectively, which can apply uniform thrust to the clamping block 6 to prevent the clamping block 6 from tilting, thereby further improving the reliability of the connection between the clamping block 6 and the two flanges 2.

[0035] Working principle: When in use, align the two tube bodies 1, align the two flanges 2 at the ends of the two tube bodies 1, adjust the relative positions of the two flanges 2, and at the same time make one end of the connecting ring 1 3 and the connecting ring 2 4 contact. When the positioning rods 304 in the multiple radial positioning mechanisms inside the connecting ring 1 3 are aligned with the positioning holes 306 on the flange 2, the push plate 302 is pushed by the elastic force of the multiple positioning springs 303. The push plate 302 pushes the positioning rod 304 to the inner side of the positioning hole 306. When the positioning rods 304 in the multiple radial positioning mechanisms are inserted into the positioning holes 306 at the corresponding positions, the positioning rods 304 are pushed into the positioning holes 306 at the corresponding positions. After the holes 306 are inserted into the inside, the two flanges 2 can be radially positioned, thereby radially positioning the two pipe bodies 1. The positioning rod 304 can be inserted into the insert block 305, which can increase the lateral thrust borne by the positioning rod 304 and prevent the positioning rod 304 from bending, thereby providing stronger radial positioning stability for the two flanges 2, preventing the pipe body 1 from being subjected to the impact and pressure of seawater, resulting in radial misalignment between the two flanges 2, thereby preventing the sealing ring between the two flanges 2 from being damaged, thereby ensuring the sealing performance between the two flanges 2 under high water pressure environment; After the multiple radial positioning mechanisms have positioned the two flanges 2, it is necessary to move the multiple clamping blocks 6 synchronously toward the outside of the flanges 2 so that the openings 12 at one end of the clamping blocks 6 are clamped on the outside of the two flanges 2, thereby clamping the two flanges 2, thereby connecting and fixing the two flanges 2, and then connecting the ends of the two pipe bodies 1; During the specific operation, the hexagonal socket tool is sleeved on the outside of the hexagonal rotating block 402 of the locking mechanism, and then the hexagonal rotating block 402 is rotated by the socket tool. The hexagonal rotating block 402 drives the rotating disk 401 to rotate, so that the rotating disk 401 rotates clockwise. Figure 4 As shown, the rotating disk 401 and the hexagonal rotating block 402 can drive the worm shaft 109 of the worm gear mechanism to rotate, the worm shaft 109 drives the worm 107 to rotate, the worm 107 drives the worm wheel 108 to rotate, and the worm wheel 108 drives the outer ring gear 105 of the gear transmission mechanism to rotate, and the outer ring gear 105 drives multiple gears 106 to rotate synchronously through the teeth, and the multiple gears 106 respectively drive the screws 104 of the multiple driving mechanisms to rotate synchronously, and when the multiple screws 104 rotate, they drive the multiple sliders 101 to move synchronously on the inside of the cavity 5 through the threads. Since the inclined grooves 102 are respectively opened in each clamping block 6 and are located on both sides of the guide groove 13, and two sliding pins 103 are provided on both sides of the slider 101, the two sliding pins 103 are movably adapted to the inner sides of the two inclined grooves 102, as shown in FIG. Figure 11As shown, a guide rod 110 is fixed to the inner side of each cavity 5, and each slider 101 is slidably sleeved on the outer side of the guide rod 110 at the corresponding position. Under the guidance of the guide rod 110, the slider 101 moves horizontally. When the slider 101 moves horizontally, it drives the two sliding pins 103 on both sides to move. Through the sliding adaptation of the sliding pin 103 and the inner side of the inclined groove 102, the sliding pin 103 applies a thrust pointing to the center of the flange 2 to the clamping block 6 through the inclined groove 102, thereby pushing the clamping block 6 to extend to the outside of the cavity 5, so that the opening 12 at one end of the clamping block 6 is clamped between the two law The outer side of the flange 2 is clamped and fixed, thereby realizing the connection and fixation of the two pipe bodies 1. The two flanges 2 are clamped and fixed by the clamping block 6, which improves the reliability of the fixation. When the pipe body 1 is subjected to seawater pressure and seawater impact in the deep sea, the clamping block 6 with higher strength is not easy to deform, so that the two flanges 2 are always closely fitted, thereby avoiding the generation of a small gap between the two flanges 2, thereby reducing the squeezing of the sealing ring between the two flanges 2 by the uneven seawater pressure, and ensuring the sealing performance between the two flanges 2; In order to prevent the worm shaft 109 in the worm gear mechanism from rotating in the opposite direction, a locking mechanism is provided. Each pin 404 in the locking mechanism always has a certain torsional moment under the elastic force of the torsion spring 410. The pin 404 transmits the torsional moment to the pawl 405, so that one end of the pawl 405 is always fitted into the inner side of the countersunk hole 413. Since the cross-sections of the multiple locking teeth 406 are all right-angled trapezoidal structures, the rotating disk 401 can drive the multiple pawls 405 to rotate clockwise. Figure 4 As shown, when rotating counterclockwise, the multiple pawls 405 will press against the multiple locking teeth 406, thereby preventing the rotating disk 401 from rotating counterclockwise, playing a one-way locking role, which can prevent the worm shaft 109 from rotating in the opposite direction, thereby preventing the worm 107 and the worm wheel 108 from rotating in the opposite direction, thereby preventing the multiple screws 104 from rotating in the opposite direction, and preventing the multiple clamping blocks 6 from moving in the opposite direction, so that the multiple clamping blocks 6 can always be clamped on the outside of the two flanges 2, continuously clamping and fixing the two flanges 2, and improving the connection reliability of the two pipe bodies 1; When the pipe body 1 and the flange 2 are placed in the deep sea, seawater will enter the inner side of the annular cavity 201 through the multiple connecting holes 205 of the pressure sealing mechanism. Under the action of the strong pressure of the seawater, the seawater will exert a large thrust on the annular slide 202. After the annular slide 202 is thrust, it will push the annular slide 203 and the sealing pressure plate 204 to extend outward. Since the two ends of the connecting ring 3 are respectively equipped with end plates 1 7 and end plates 2 8, and one side of the end plate 1 7 and the sealing pressure plate 204 is provided with a sealing gasket 9, the sealing pressure plate 204 is thrust by the annular slide 202 and the annular slide 203. The end plate 107 at one end of the connecting ring 103 is pressed against the end plate 107, and a sealing effect is achieved through the sealing gasket 9 between the two. Therefore, a sealed space is formed between the connecting ring 103 and the connecting ring 204 through the pressure sealing mechanism. The two flanges 2 are in the sealed space. The pressure of the external seawater first acts on the sealing gasket 9 between the sealing pressure plate 204 and the end plate 107. Therefore, the seawater pressure on the sealing ring between the two flanges 2 can be greatly reduced, thereby reducing the aging of the sealing ring between the two flanges 2, thereby further improving the sealing performance between the two flanges 2.

[0036] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0037] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A deep-sea natural gas transmission pipeline connection device, comprising two pipe bodies, both ends of which are fixed with flanges, characterized in that: It also includes a connecting ring 1 and a connecting ring 2 respectively fixed to the two ends of the tube body, wherein the interior of the connecting ring 1 is provided with a plurality of cavities, and the inner side of each of the cavities is provided with a clamping block that can be slidably moved toward the outside of the cavity by a pushing mechanism, and one end of each clamping block is provided with an opening for pressing the two flanges; The pushing mechanism includes an inclined groove provided inside the clamping block, a slider slidably provided inside the cavity, and a sliding pin movably adapted to the inner side of the inclined groove provided on the outer side of the slider; It also includes a driving mechanism for driving the multiple sliders to move horizontally; The driving mechanism includes a screw that is rotatably connected to the inside of the cavity and a gear transmission mechanism that drives the screw to rotate. The screw is rotatably connected to the inside of the slider through a thread. The gear transmission mechanism includes a gear fixed at one end of the screw, an outer gear ring that is rotatably arranged inside a connecting ring and meshes with the gear, and a worm gear mechanism that drives the outer gear ring to rotate.

2. A deep-sea natural gas transmission pipeline connection device according to claim 1, characterized in that: An annular groove is provided at one end of the connecting ring one, and the outer gear ring is rotatably connected to the inner side of the annular groove. The worm gear mechanism includes a worm wheel fixed to one end of the outer gear ring and rotatably engaged with the inner side of the annular groove, and a worm shaft rotatably inserted into the inner side of the annular groove. A worm meshing with the worm wheel is fixed to the outer side of the worm shaft, and a locking mechanism for locking the worm shaft is provided on the outer side of the connecting ring one.

3. A deep-sea natural gas transmission pipeline connection device according to claim 2, characterized in that: The locking mechanism includes a locking tube fixed to an outer side of a connecting ring and rotatably adapted to an outer end of a worm shaft, a rotating disk and a hexagonal rotating block slidably sleeved on an outer end of the worm shaft and fixed to each other, an outer groove is provided on the outer side of the rotating disk, a plurality of pawls are rotatably provided on the inner side of the outer groove, a countersunk hole is provided on the inner end of the locking tube, a plurality of locking teeth are provided on the inner side of the countersunk hole near the port, and the cross-section of each locking tooth is a right-angled trapezoidal structure.

4. A deep-sea natural gas transmission pipeline connection device according to claim 3, characterized in that: One end of the rotating disk is connected to a limit spring, and one end of the limit spring is rotatably connected to the inner bottom end of the countersunk hole through a thrust bearing.

5. The deep-sea natural gas transmission pipeline connection device according to claim 3, characterized in that: Each of the pawls is rotatably connected to the inner side of the outer groove via a pin shaft, one end of each of the pin shafts is fixed with a flange, and one end of each of the flanges is elastically connected to the outer side of the rotating disk via a torsion spring.

6. A deep-sea natural gas transmission pipeline connection device according to claim 3, characterized in that: A plurality of stoppers for limiting the hexagonal rotating block are fixed to one outer end of the worm shaft.

7. The deep-sea natural gas transmission pipeline connection device according to claim 1, characterized in that: Two horizontal grooves are arranged at both ends of the inclined groove, and one end of the two horizontal grooves is smoothly connected to the two ends of the inclined groove respectively.

8. The deep-sea natural gas transmission pipeline connection device according to claim 1, characterized in that: A pressure sealing mechanism is provided inside the connecting ring 2, and the pressure sealing mechanism includes an annular cavity opened inside the connecting ring 2, an annular slide is slidingly provided on the inner side of the annular cavity, an annular slide cylinder extending to the outside of the connecting ring 2 is fixed at one end of the annular slide cylinder, a sealing pressure plate aligned with one end of the connecting ring is fixed at one end of the annular slide cylinder, and the inside of the annular cavity is connected to the outside through a plurality of connecting holes opened at one end of the connecting ring 2.

9. The deep-sea natural gas transmission pipeline connection device according to claim 1, characterized in that: A plurality of radial positioning mechanisms are provided inside the connecting ring 1, and the radial positioning mechanisms include a spring cavity opened inside the connecting ring 1, an insert block fixed at a position corresponding to the spring cavity on the inner side of the connecting ring 1, and positioning holes opened at positions corresponding to the spring cavity inside the two flanges. A push plate is slidably connected to the inner side of the spring cavity, one end of the push plate is elastically connected to the inner end of the spring cavity through a positioning spring, and a positioning insert rod passing through the positioning hole is fixed to the other end of the push plate.

10. The deep-sea natural gas transmission pipeline connection device according to claim 1, characterized in that: A guide groove is formed at one end of each clamping block, and each sliding block is slidably fitted into the inner side of the guide groove at a corresponding position.

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