A sealing device for cable transit

Abstract

The application discloses a sealing device for cable cabin penetration, and belongs to the technical field of sealing. The sealing device comprises pressure-resistant welded pipes, a ship side valve, a ball valve and a dynamic sealing valve which are sequentially connected. The pressure-resistant welded pipes are installed and penetrated on a cabin body, and the pressure-resistant welded pipes are provided with first through holes. The ship side valve comprises a first valve body and a first valve core. The ball valve comprises a second valve body and a ball valve core, and the second valve body is provided with a containing cavity and a third through hole coaxially communicating with the second through hole. The dynamic sealing valve comprises a third valve body, an elastic ring, a squeezing ring and a driving piece, the third valve body is provided with a fourth through hole coaxially communicating with the third through hole, the elastic ring is fixedly coaxially inserted on the inner circumferential wall of the third valve body, one end surface of the elastic ring is in abutment with the third valve body, and the squeezing ring is coaxially and slidingly arranged on the inner circumferential wall of the third valve body. The sealing device for cable cabin penetration can conveniently realize the sealing of the cabin body in the cable recovery or release process.

Description

Technical Field

[0001] This invention belongs to the field of sealing technology, and more specifically, relates to a sealing device for cable passing through a cable compartment. Background Technology

[0002] When a submersible is navigating underwater, in order to maintain communication with the outside world, it needs to release hundreds of meters of cable inside the cabin through the outer shell of the cabin, keep it there for a period of time, and then retract and store it inside the cabin.

[0003] However, conventional sealing devices often fail to ensure good airtightness of the cable housing during release and retrieval. Summary of the Invention

[0004] In view of the above-mentioned defects or improvement needs of the prior art, the present invention provides a sealing device for cable passing through a hull, the purpose of which is to conveniently seal the hull during cable retrieval or release, effectively preventing seawater outside the hull from entering the hull.

[0005] The present invention provides a sealing device for cable passing through a hull, the sealing device comprising a pressure-resistant welded pipe, a ship's side valve, a ball valve and a dynamic sealing valve connected in sequence;

[0006] The pressure-resistant welded pipe is used for installation and penetrates the cabin body, and the pressure-resistant welded pipe has a first through hole;

[0007] The ship's side valve includes a first valve body and a first valve core. The first valve body has a second through hole that is coaxially connected to the first through hole. The first valve core is movably inserted into the first valve body to seal the second through hole.

[0008] The ball valve includes a second valve body and a ball valve core. The second valve body has a accommodating cavity and a third through hole for coaxially communicating with the second through hole. The accommodating cavity is located in the middle of the third through hole and communicates with the third through hole. The ball valve core is vertically and vertically arranged in the accommodating cavity. The ball valve core is used to seal one end of the third through hole by gravity.

[0009] The dynamic sealing valve includes a third valve body, an elastic ring, a compression ring, and a driving member. The third valve body has a fourth through hole coaxially connected to the third through hole. The elastic ring is fixedly and coaxially inserted into the inner peripheral wall of the third valve body, and one end face of the elastic ring abuts against the third valve body. The compression ring is coaxially and slidably arranged on the inner peripheral wall of the third valve body. The driving member is located on the third valve body to drive the compression ring to slide and compress the other end face of the elastic ring, thereby causing the inner side of the elastic ring to deform uniformly towards the center of the elastic ring.

[0010] Optionally, the sealing device further includes a cutting valve, both ends of which are connected to the ball valve and the dynamic sealing valve. The cutting valve includes a fourth valve body and a fourth valve core. The fourth valve body has a fifth through hole, both ends of which are coaxially connected to the third through hole and the fourth through hole, respectively. The fourth valve core is movably inserted into the fourth valve body to seal the fifth through hole. The edge of the fourth valve core has a cutting edge for cutting cables.

[0011] Optionally, the fourth valve core is rotatably inserted into the fourth valve body and inserted into the middle of the fifth through hole. The fourth valve core has a connecting hole. The fourth valve core is configured such that when the fourth valve core is rotated to a first state, the connecting hole connects the two ends of the fifth through hole, and when the fourth valve core is rotated to a second state, the connecting hole is misaligned with the fifth through hole, and the fifth through hole is sealed.

[0012] Optionally, the driving component is a worm and a worm wheel, which are rotatably arranged on the third valve body. The worm and the worm wheel mesh, and the inner peripheral wall of the worm wheel and the outer peripheral wall of the extrusion ring are threaded together.

[0013] Optionally, the drive unit further includes a handwheel located outside the third valve body, the handwheel being fixedly connected to the worm gear to drive the worm gear to rotate.

[0014] Optionally, one end of the pressure-resistant welded pipe, both ends of the first valve body, both ends of the second valve body, and both ends of the third valve body are each provided with a flange, and the pressure-resistant welded pipe, the ship's side valve, the ball valve, and the dynamic sealing valve are all detachably connected through two opposing flanges.

[0015] Optionally, an O-ring is sandwiched between the two opposing flanges.

[0016] Optionally, the sealing device further includes a water collector, which is fixedly connected to the dynamic sealing valve. The water collector has a sixth through hole and a drain hole. The sixth through hole is coaxially arranged and communicates with the fourth through hole. The inner peripheral wall of the water collector has an elastic sealing ring coaxially arranged with the sixth through hole. The drain hole is perpendicular to and communicates with the sixth through hole.

[0017] Optionally, the accommodating cavity has a conical valve core with a guide slope to guide the movement of the ball valve core.

[0018] Optionally, the number of the dynamic sealing valves is two.

[0019] The beneficial effects of the technical solution provided by the embodiments of the present invention are as follows:

[0020] For the sealing device for cable passing through the cabin provided in the embodiment of the present invention, the sealing device is first fixed to the cabin body in advance by means of a pressure-resistant welded pipe (to ensure the sealing of the fixed pipe). The pressure-resistant welded pipe passes through the outer shell of the cabin body, that is, one end of the pressure-resistant welded pipe extends out of the cabin body and the other end extends into the cabin body. At this time, the ship's side valve, ball valve and dynamic sealing valve are all located in the cabin body.

[0021] After the cable is fully or partially recovered to the ball valve, on the one hand, the first valve core is controlled to manually seal the second through hole. On the other hand, the ball valve core, under the action of gravity, automatically seals the third through hole. Thus, the sealing device can be manually sealed by the ship's side valve, and automatically sealed by the ball valve, thereby achieving the sealing of the hull.

[0022] When releasing the cable, firstly, the ship's side valve and ball valve remain sealed. The cable extends into the fourth through hole. At this point, the driving component drives the compression ring to slide, which in turn compresses the elastic ring. This causes the inner side of the elastic ring to deform uniformly towards its center, eliminating the gap between the cable and the fourth through hole and sealing the outer periphery of the cable. This ensures continued sealing of the hull during subsequent cable release. Next, the cable continues to be released. During this process, the cable pushes the ball valve core upwards, moving it into the receiving cavity. At this point, the third through hole is open. Finally, the ship's side valve is opened, and the cable continues to be released, flowing out of the hull through the second and first through holes.

[0023] In other words, the sealing device for cable passing through the cabin provided by the embodiments of the present invention can conveniently seal the cabin during the cable retrieval or release process, effectively preventing seawater outside the cabin from entering the cabin. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a sealing device for cable passing through a cable compartment provided in an embodiment of the present invention;

[0025] Figure 2 This is a cross-sectional view of the pressure-resistant welded pipe provided in an embodiment of the present invention;

[0026] Figure 3 This is a cross-sectional view of the ship's side valve provided in an embodiment of the present invention;

[0027] Figure 4 This is a cross-sectional view of the ball valve provided in an embodiment of the present invention;

[0028] Figure 5 This is an axial sectional view of the dynamic sealing valve provided in an embodiment of the present invention;

[0029] Figure 6 This is a cross-sectional view of the cutting valve provided in an embodiment of the present invention;

[0030] Figure 7 This is a radial sectional view of the dynamic sealing valve provided in an embodiment of the present invention;

[0031] Figure 8 This is a cross-sectional view of the leak collector provided in an embodiment of the present invention.

[0032] The symbols in the diagram represent the following meanings:

[0033] 1. Pressure-resistant welded pipe; 11. First through hole; 2. Ship's side valve; 21. First valve body; 211. Second through hole; 22. First valve core; 3. Ball valve; 31. Second valve body; 311. Receiving cavity; 3111. Conical valve core; 312. Third through hole; 313. Lip seal ring; 32. Ball valve core; 4. Dynamic sealing valve; 41. Third valve body; 411. Fourth through hole; 42. Elastic ring; 43. Extrusion ring; 44. Drive unit; 441. Worm gear; 442. Worm wheel; 443. Handwheel; 5. Cutting valve; 51. Fourth valve body; 511. Fifth through hole; 52. Fourth valve core; 521. Connecting hole; 6. Flange; 61. O-ring seal; 7. Leakage collector; 71. Sixth through hole; 72. Drain hole; 73. Elastic sealing ring; 8. Handle; 9. Pin; 10. Connecting pipe; 100. Position sensor. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0035] Figure 1 This is a structural schematic diagram of a sealing device for cable passage through a cable compartment provided in an embodiment of the present invention, as shown below. Figure 1 As shown, the sealing device includes a pressure-resistant welded pipe 1, a ship's side valve 2, a ball valve 3, and a dynamic sealing valve 4 connected in sequence.

[0036] Figure 2 This is a cross-sectional view of the pressure-resistant welded pipe provided in an embodiment of the present invention, such as... Figure 2 As shown, the pressure-resistant welded pipe 1 is used for installation and penetrates the hull, and the pressure-resistant welded pipe 1 has a first through hole 11.

[0037] Figure 3 This is a cross-sectional view of the ship's side valve provided in an embodiment of the present invention, such as... Figure 3As shown, the ship's side valve 2 includes a first valve body 21 and a first valve core 22. The first valve body 21 has a second through hole 211 that is coaxially connected with the first through hole 11. The first valve core 22 is movably inserted into the first valve body 21 to seal the second through hole 211.

[0038] Figure 4 This is a cross-sectional view of the ball valve provided in an embodiment of the present invention, such as... Figure 4 As shown, the ball valve 3 includes a second valve body 31 and a ball valve core 32. The second valve body 31 has a receiving cavity 311 and a third through hole 312 for coaxially communicating with the second through hole 211. The receiving cavity 311 is located in the middle of the third through hole 312 and communicates with the third through hole 312. The ball valve core 32 is arranged vertically in the receiving cavity 311 and is used to seal one end of the third through hole 312 by gravity.

[0039] Figure 5 This is an axial sectional view of the dynamic sealing valve provided in an embodiment of the present invention, as shown below. Figure 5 As shown, the dynamic sealing valve 4 includes a third valve body 41, an elastic ring 42, a compression ring 43, and a driving member 44. The third valve body 41 has a fourth through hole 411 coaxially connected to the third through hole 312. The elastic ring 42 is fixedly and coaxially inserted into the inner peripheral wall of the third valve body 41, and one end face of the elastic ring 42 abuts against the third valve body 41. The compression ring 43 is coaxially and slidably arranged on the inner peripheral wall of the third valve body 41. The driving member 44 is located on the third valve body 41 to drive the compression ring 43 to slide and compress the other end face of the elastic ring 42, thereby causing the inner side of the elastic ring 42 to deform uniformly towards the center of the elastic ring 42.

[0040] For the sealing device for cable passing through the cabin provided in the embodiment of the present invention, the sealing device is first fixed to the cabin body in advance by the pressure-resistant welded pipe 1 (to ensure the sealing of the fixed position). The pressure-resistant welded pipe 1 penetrates the outer shell of the cabin body, that is, one end of the pressure-resistant welded pipe 1 extends out of the cabin body and the other end of the pressure-resistant welded pipe 1 extends into the cabin body. At this time, the ship's side valve 2, ball valve 3 and dynamic sealing valve 4 are all located in the cabin body.

[0041] After the cable is fully or partially recovered to ball valve 3, on the one hand, the first valve core 22 is controlled to manually seal the second through hole 211. On the other hand, the ball valve core 32 automatically seals the third through hole 312 under the action of gravity. Thus, the sealing device can be manually sealed by the ship's side valve 2, and automatically sealed by the ball valve 3, thereby achieving the sealing of the hull.

[0042] When releasing the cable, firstly, the ship's side valve 2 and ball valve 3 remain sealed. The cable extends into the fourth through hole 411. At this time, the driving component 44 drives the compression ring 43 to slide, which in turn compresses the elastic ring 42, causing the inner side of the elastic ring 42 to deform uniformly towards its center. This eliminates the gap between the cable and the fourth through hole 411, sealing the outer periphery of the cable and ensuring the same sealing of the hull during subsequent cable release. Next, the cable continues to be released. During the release process, the cable pushes the ball valve core 32 upward, causing it to move into the receiving cavity 311. At this time, the third through hole 312 is open. Finally, the ship's side valve 2 is opened, and the cable continues to be released. The cable is released outside the hull through the second through hole 211 and the first through hole 11.

[0043] In other words, the sealing device for cable passing through the cabin provided by the embodiments of the present invention can conveniently seal the cabin during the cable retrieval or release process, effectively preventing seawater outside the cabin from entering the cabin.

[0044] Figure 6 This is a cross-sectional view of the cutting valve provided in an embodiment of the present invention, such as... Figure 6 As shown, the sealing device also includes a cutting valve 5. Both ends of the cutting valve 5 are connected to the ball valve 3 and the dynamic sealing valve 4. The cutting valve 5 includes a fourth valve body 51 and a fourth valve core 52. The fourth valve body 51 has a fifth through hole 511. The two ends of the fifth through hole 511 are coaxially connected to the third through hole 312 and the fourth through hole 411, respectively. The fourth valve core 52 is movably inserted into the fourth valve body 51 to seal the fifth through hole 511. The edge of the fourth valve core 52 has a cutting edge for cutting cables.

[0045] In the above embodiment, when the cable gets stuck during release or retrieval, the movement of the fourth valve core 52 can not only cut the cable with the cutting edge, ensuring that the ship's side valve 2 and ball valve 3 can be sealed, but also further seal the fifth through hole 511 at the same time, thereby achieving the sealing of the cutting valve 5.

[0046] Specifically, regarding the sealing of the fifth through hole 511 by the fourth valve core 52, the fourth valve core 52 is rotatably inserted into the fourth valve body 51 and inserted into the middle of the fifth through hole 511. The fourth valve core 52 has a connecting hole 521. The fourth valve core 52 is configured such that when the fourth valve core 52 rotates to the first state, the connecting hole 521 connects the two ends of the fifth through hole 511. When the fourth valve core 52 rotates to the second state, the connecting hole 521 is misaligned with the fifth through hole 511, and the fifth through hole 511 is sealed.

[0047] Preferably, when the fourth valve core 52 is in the second state, the connecting hole 521 is perpendicular to the fifth through hole 511.

[0048] For example, both the fourth valve core 52 and the first valve core 22 have handles 8 to facilitate the movement of the valve cores.

[0049] It should be noted that in this embodiment, the sealing method of the ship's side valve 2 is the same as that of the cutting valve 5, both of which achieve sealing or unsealing of the corresponding through hole by rotation (i.e., the first valve core 22 has a connecting hole 521 that connects to the second through hole 211 by rotation). In addition, the first valve core 22 of the ship's side valve 2 and the fourth valve core 52 of the cutting valve 5 are both limited by a pin 9, one end of which is inserted into the corresponding valve body to prevent the first valve core 22 or the fourth valve core 52 from rotating accidentally.

[0050] In other embodiments of the present invention, the hull valve 2 and the cutting valve 5 can also achieve sealing of the through hole by means of sliding limit, and the present invention does not limit this.

[0051] Figure 7 This is a radial sectional view of the dynamic sealing valve provided in an embodiment of the present invention, such as... Figure 7 As shown, the driving component 44 consists of a worm 441 and a worm wheel 442, which are rotatably arranged on the third valve body 41. The worm 441 and the worm wheel 442 mesh, and the inner peripheral wall of the worm wheel 442 is threadedly engaged with the outer peripheral wall of the compression ring 43.

[0052] In the above embodiment, the worm gear 441 drives the worm wheel 442 to rotate, thereby converting the rotational motion of the compression ring 43 into linear motion, thereby compressing and deforming the elastic ring 42.

[0053] It should be noted that the driving component 44 can also be configured as a gear and rack, and the present invention does not limit this.

[0054] For example, the elastic ring 42 is made of special rubber, which is wear-resistant, elastic, and has low water absorption.

[0055] For example, the drive unit 44 also includes a handwheel 443, which is located outside the third valve body 41 and is fixedly connected to the worm gear 441 to drive the worm gear 441 to rotate, thereby facilitating the rotation of the worm gear 441 via the handwheel 443. To accurately control the adjustment amount, the handwheel 443 is a miniature high-strength counting handwheel.

[0056] Figure 8 This is a cross-sectional view of the leak collector provided in an embodiment of the present invention, such as... Figure 8 As shown, the sealing device also includes a water collector 7, which is fixedly connected to the dynamic sealing valve 4. The water collector 7 has a sixth through hole 71 and a drain hole 72. The sixth through hole 71 is coaxially arranged and connected with the fourth through hole 411. The inner peripheral wall of the water collector 7 has an elastic sealing ring 73 arranged coaxially with the sixth through hole 71. The drain hole 72 is perpendicular to and connected with the sixth through hole 71.

[0057] In the above embodiment, the elastic sealing ring 73 is sleeved on the outside of the cable to seal the gap between the cable and the sixth through hole 71. The leak collector 7 can collect a small portion of the leaked seawater through the drain hole 72.

[0058] For example, the drain hole 72 is connected to the main drain pipe.

[0059] See you again Figure 4 The accommodating cavity 311 contains a conical valve core 3111, which has a guide slope to guide the lifting and lowering of the ball valve core 32.

[0060] It is easy to understand that the conical valve core 3111 guides the lifting and lowering of the ball valve core 32, allowing the ball valve core 32 to move laterally quickly while lifting and lowering, so that the cable can quickly pass through the third through hole 312 when released.

[0061] In addition, one end of the third through hole 312 has a lip seal 313, which ensures that the ball valve core 32 can seal the third through hole 312 after squeezing the lip seal 313.

[0062] In this embodiment, one end of the pressure-resistant welded pipe 1, both ends of the first valve body 21, both ends of the second valve body 31, and both ends of the third valve body 41 are all equipped with flanges 6. The pressure-resistant welded pipe 1, the ship's side valve 2, the ball valve 3, and the dynamic sealing valve 4 are all detachably connected through two opposing flanges 6, thereby connecting multiple valve bodies through the flanges 6, which facilitates disassembly, assembly, and maintenance.

[0063] For example, an O-ring 61 is sandwiched between two opposing flanges 6 to prevent leakage between two adjacent valve bodies.

[0064] See you again Figure 1 There are two dynamic sealing valves (4). That is, two sets of seals are used, which serve as backups for each other. Each set can work independently, improving the reliability of the dynamic seal.

[0065] In this embodiment, the sealing device further includes a connecting pipe 10, which is located between the ship's side valve 2 and the ball valve 3 and connects the second through hole 211 and the third through hole 312. The connecting pipe 10 has a position sensor 100 for real-time monitoring of the cable position.

[0066] The sealing device provided by this invention has a simple structure, compact size, and is convenient to use and maintain. If replacement of any valve component is required, it can be completed underwater after closing the ship's side valve 2 within the cabin. Furthermore, the components of the sealing device are easy to operate; the ball valve 3 does not require manual control and can automatically open and close based on the release and retraction of the cable, completing the static sealing function after closure. The ship's side valve 2 and the cutting valve 5 can be manually operated to close and open, further ensuring the safety and reliability of the static seal. The dynamic seal employs two sets of dynamic sealing valves 4, serving as backups for each other; each set can operate independently, improving the reliability of the dynamic seal.

[0067] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A sealing device for cable passing through a conduit, characterized in that, The sealing device includes a pressure-resistant welded pipe (1), a ship's side valve (2), a ball valve (3), and a dynamic sealing valve (4) connected in sequence; The pressure-resistant welded pipe (1) is used for installation and penetrates the cabin body, and the pressure-resistant welded pipe (1) has a first through hole (11); The ship's side valve (2) includes a first valve body (21) and a first valve core (22). The first valve body (21) has a second through hole (211) coaxially connected with the first through hole (11). The first valve core (22) is movably inserted into the first valve body (21) to seal the second through hole (211). The ball valve (3) includes a second valve body (31) and a ball valve core (32). The second valve body (31) has a receiving cavity (311) and a third through hole (312) for coaxially communicating with the second through hole (211). The receiving cavity (311) is located in the middle of the third through hole (312) and communicates with the third through hole (312). The ball valve core (32) is vertically arranged in the receiving cavity (311). The ball valve core (32) is used to seal one end of the third through hole (312) by gravity. The dynamic sealing valve (4) includes a third valve body (41), an elastic ring (42), a compression ring (43), and a driving member (44). The third valve body (41) has a fourth through hole (411) coaxially connected to the third through hole (312). The elastic ring (42) is fixedly and coaxially inserted into the inner peripheral wall of the third valve body (41), and one end face of the elastic ring (42) abuts against the third valve body (41). The compression ring (43) is coaxially and slidably arranged on the inner peripheral wall of the third valve body (41). The driving member (44) is located on the third valve body (41) to drive the compression ring (43) to slide and compress the other end face of the elastic ring (42), thereby causing the inner side of the elastic ring (42) to deform uniformly toward the center of the elastic ring (42).

2. A sealing device for cable passage through a conduit according to claim 1, characterized in that, The sealing device further includes a cutting valve (5), both ends of which are connected to the ball valve (3) and the dynamic sealing valve (4). The cutting valve (5) includes a fourth valve body (51) and a fourth valve core (52). The fourth valve body (51) has a fifth through hole (511). The two ends of the fifth through hole (511) are coaxially connected to the third through hole (312) and the fourth through hole (411) respectively. The fourth valve core (52) is movably inserted into the fourth valve body (51) to seal the fifth through hole (511). The edge of the fourth valve core (52) has a cutting edge for cutting cables.

3. A sealing device for cable passage through a conduit according to claim 2, characterized in that, The fourth valve core (52) is rotatably inserted into the fourth valve body (51) and inserted into the middle of the fifth through hole (511). The fourth valve core (52) has a connecting hole (521). The fourth valve core (52) is configured such that when the fourth valve core (52) is rotated to the first state, the connecting hole (521) connects the two ends of the fifth through hole (511). When the fourth valve core (52) is rotated to the second state, the connecting hole (521) is misaligned with the fifth through hole (511), and the fifth through hole (511) is sealed.

4. A sealing device for cable passage through a conduit according to claim 1, characterized in that, The driving component (44) is a worm (441) and a worm wheel (442). The worm (441) and the worm wheel (442) are rotatably arranged on the third valve body (41). The worm (441) and the worm wheel (442) mesh with each other. The inner peripheral wall of the worm wheel (442) and the outer peripheral wall of the extrusion ring (43) are threaded together.

5. A sealing device for cable passage through a conduit according to claim 4, characterized in that, The drive unit (44) also includes a handwheel (443), which is located outside the third valve body (41). The handwheel (443) is fixedly connected to the worm gear (441) to drive the worm gear (441) to rotate.

6. A sealing device for cable passing through a conduit according to claim 1, characterized in that, One end of the pressure-resistant welded pipe (1), both ends of the first valve body (21), both ends of the second valve body (31), and both ends of the third valve body (41) are provided with flanges (6). The pressure-resistant welded pipe (1), the ship's side valve (2), the ball valve (3), and the dynamic sealing valve (4) are all detachably connected by two opposing flanges (6).

7. A sealing device for cable passage through a conduit according to claim 6, characterized in that, An O-ring (61) is sandwiched between the two opposing flanges (6).

8. A sealing device for cable passage through a conduit according to any one of claims 1-7, characterized in that, The sealing device further includes a water collector (7), which is fixedly connected to the dynamic sealing valve (4). The water collector (7) has a sixth through hole (71) and a drain hole (72). The sixth through hole (71) is coaxially arranged and connected with the fourth through hole (411). The inner peripheral wall of the water collector (7) has an elastic sealing ring (73) coaxially arranged with the sixth through hole (71). The drain hole (72) is perpendicular to and connected with the sixth through hole (71).

9. A sealing device for cable passing through a conduit according to any one of claims 1-7, characterized in that, The accommodating cavity (311) has a conical valve core (3111) with a guide slope to guide the raising and lowering of the ball valve core (32).

10. A sealing device for cable passage through a conduit according to any one of claims 1-7, characterized in that, The number of dynamic sealing valves (4) is 2.

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