Overall cabin-penetrating sealing structure for transmission cable

Abstract

The invention relates to the technical field of deep sea sensing, and provides a transmission cable overall cabin-penetrating sealing structure which comprises a plug core shell, a locking sleeve, a locking nut, a sealing ring, a sealing sleeve, an injection molding sleeve and a compression-resistant sleeve, the locking sleeve is arranged in the plug core shell, a transmission cable penetrates through the locking sleeve, the locking nut is arranged on the transmission cable in a sleeving mode, and the sealing ring is arranged in the sealing sleeve. The locking nut comprises an insertion section and an exposed section, and the insertion section is inserted between the locking sleeve and the plug core shell so that the locking sleeve and the transmission cable can be tightly held; the outer side of the insertion section and the inner wall of the plug core shell are sealed through a sealing ring, and the inner side of the exposed section and the transmission cable are sealed through a sealing sleeve. The injection molding sleeve wraps part of the plug core shell, the exposed section and the transmission cable; and the compression-resistant sleeve is arranged on the outer side of the injection molding sleeve. The device has the advantages of reliable structure, high pressure resistance and good deep sea sealing performance.

Description

Technical Field

[0001] The present application belongs to the field of deep sea sensing technology, and more specifically, to a transmission cable integral cabin penetration sealing structure. Background Art

[0002] In the field of deep-sea sensing technology, it is sometimes necessary to transmit photoelectric signals from a detection device placed several thousand meters underwater via a transmission cable back to a surface demodulation device in order to obtain relevant underwater information.

[0003] At present, there are two main ways to penetrate a fiber optic hydrophone array: fiber optic penetration and overall transmission cable penetration. The fiber optic penetration method requires passing the bare optical fiber or loose-tube optical fiber through a metal structure and sealing it inside. This method has become mature and has successful cases. However, due to the increasingly extensive application and complex functional requirements of fiber optic hydrophone arrays, it is sometimes necessary to pass the entire transmission cable through a metal structure to the inside of the fiber optic hydrophone array, and then pick out the transmission cable fiber and fuse it with the optical device. However, the existing overall penetration sealing method generally uses several sealing rings to seal the transmission cable and the penetration shell, and its sealing reliability is low and cannot withstand high pressure. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the embodiments of the present application is to provide an integral cabin penetration sealing structure for a transmission cable, which has the advantages of reliable structure, high pressure resistance, and good deep-sea sealing.

[0005] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: to provide an integral transmission cable cabin penetration sealing structure, including: a plug core shell, a locking sleeve, a locking nut, a sealing ring, a sealing sleeve, an injection molding sleeve and a pressure-resistant sleeve, the locking sleeve is arranged in the plug core shell, the transmission cable passes through the locking sleeve, the locking nut is sleeved on the transmission cable, the locking nut includes an insertion section and an external leakage section, the insertion section is inserted between the locking sleeve and the plug core shell so that the locking sleeve and the transmission cable are tightly embraced; the outer side of the insertion section and the inner wall of the plug core shell are sealed by a sealing ring, and the inner side of the external leakage section and the transmission cable are sealed by a sealing sleeve; the injection molding sleeve wraps part of the plug core shell, the external leakage section and the transmission cable; the pressure-resistant sleeve is arranged on the outer side of the injection molding sleeve.

[0006] In one embodiment, the injection molding sleeve includes a first cylindrical portion and a first truncated cone portion, and the pressure-resistant sleeve is a metal piece and wraps the first cylindrical portion.

[0007] In one embodiment, the transmission cable integral cabin penetration sealing structure further includes a bend limiting sleeve wrapping the pressure-resistant sleeve, the first truncated cone portion and the transmission cable; the bend limiting sleeve includes a second cylindrical portion and a second truncated cone portion.

[0008] In one embodiment, the bending limiting sleeve is made of polyurethane.

[0009] In one embodiment, the outer side of the plug core shell wrapped by the injection sleeve is provided with a plurality of first annular grooves, the outer side of the external leakage section wrapped by the injection sleeve is provided with a plurality of second annular grooves, and the inner wall of the injection sleeve is embedded in the first annular grooves and the second annular grooves during injection molding.

[0010] In one embodiment, the locking sleeve has a truncated cone structure and a C-shaped cross section, and a plurality of annular protrusions are provided on the inner wall of the locking sleeve.

[0011] In one embodiment, a limiting protrusion is provided on the end surface of the locking sleeve, a limiting protrusion ring is provided in the plug core housing, and a limiting groove for inserting the limiting protrusion is provided on the limiting protrusion ring.

[0012] In one embodiment, an outer ring groove is provided on the outer side of one end of the plug core shell away from the injection molding sleeve, the outer ring groove is inserted into the PU tube, and a buckling ring is provided on the outer side of the PU tube at a position corresponding to the outer ring groove.

[0013] The beneficial effects of the transmission cable integral cabin penetration sealing structure provided by the present application are: the transmission cable is locked by the locking nut and the locking sleeve to limit the axial displacement of the transmission cable; the seal between the plug core shell and the locking nut is jointly guaranteed by the sealing ring seal and the injection molding sleeve seal; the seal between the transmission cable and the plug core shell is jointly guaranteed by the locking nut buckling seal at the sealing sleeve part and the injection molding sleeve seal; the injection molding sleeve is made of the same material as the outer surface of the transmission cable, which can achieve the best adhesion and sealing effect, and at the same time, its pressure resistance is guaranteed by setting a pressure-resistant sleeve, and it has the advantages of reliable structure, high pressure resistance and good deep-sea sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 A schematic diagram of the overall structure of the transmission cable integral cabin penetration sealing structure provided in an embodiment of the present application;

[0016] Figure 2 A schematic diagram of a cross-sectional structure of a transmission cable integral cabin penetration sealing structure provided in an embodiment of the present application after being connected to a PU tube;

[0017] Figure 3 This is a schematic diagram of an oblique top view of the structure of the plugging core housing in the overall cabin penetration sealing structure of the transmission cable provided in an embodiment of the present application;

[0018] Figure 4 A schematic diagram of the three-dimensional structure of a locking sleeve in the overall cabin penetration sealing structure of a transmission cable provided in an embodiment of the present application;

[0019] Figure 5 A schematic diagram of the three-dimensional structure of a locking nut in the overall cabin penetration sealing structure of a transmission cable provided in an embodiment of the present application;

[0020] Figure 6 This is a schematic diagram of the structure after the locking nut and the plug shell are assembled in the transmission cable integral cabin sealing structure provided in an embodiment of the present application.

[0021] Among them, the reference numerals in the figure are:

[0022] 1. Plug core shell; 11. First annular groove; 12. Transmission cable; 13. Limiting convex ring; 14. Limiting groove; 15. Outer annular groove; 2. Locking sleeve; 21. Annular protrusion; 22. Limiting convex block; 3. Locking nut; 31. Insertion section; 32. External leakage section; 33. Second annular groove; 4. Sealing ring; 5. Sealing sleeve; 6. Injection molding sleeve; 61. First cylindrical part; 62. First frustum of cone part; 7. Compression sleeve; 8. Bending limiting sleeve; 81. Second cylinder; 82. Second frustum of cone part; 9. PU tube; 10. Snap ring. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0024] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0025] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] like Figure 1-Figure 6 As shown, a transmission cable integral cabin penetration sealing structure provided by an embodiment of the present application is now described. The transmission cable integral cabin penetration sealing structure comprises: a plug core housing 1, a locking sleeve 2, a locking nut 3, a sealing ring 4, a sealing sleeve 5, an injection sleeve 6 and a pressure-resistant sleeve 7. The locking sleeve 2 is arranged in the plug core housing 1, one end of the locking sleeve 2 is a truncated cone structure, and there is a gap between the side wall of the truncated cone structure and the inner wall of the plug core housing 1. The transmission cable 12 passes through the locking sleeve 2, and the locking nut 3 is sleeved on the transmission cable 12. The locking nut 3 comprises an insertion section 31 and an external leakage section 32. The inner wall of the insertion section 31 is wedge-shaped, for the truncated cone structure of the locking sleeve 2 to be inserted and the locking sleeve 2 to be contracted; when the insertion section 31 is inserted between the locking sleeve 2 and the plug core housing 1, the locking sleeve 2 and the transmission cable 12 are tightly embraced; in this way, the axial direction of the transmission cable 12 can be effectively limited.

[0028] Among them, the outer side of the insertion section 31 and the inner wall of the plugging core shell 1 are sealed by a sealing ring 4, and two or more sealing rings 4 are arranged at intervals to ensure the sealing effect; the inner side of the external leakage section 32 and the transmission cable 12 are sealed by a sealing sleeve 5, and the sealing sleeve 5 and the sealing ring 4 are both rubber parts; the injection sleeve 6 adopts a mold to assemble the sealing structure by injection molding, and the injection sleeve 6 wraps part of the plugging core shell 1, the external leakage section 32 and the transmission cable 12. The purpose of the injection sleeve 6 is to seal between the plugging core shell 1 and the locking nut 3, and between the locking nut 3 and the transmission cable 12, so as to further ensure the sealing effect; the pressure-resistant sleeve 7 is arranged on the outside of the injection sleeve 6, and the purpose of the pressure-resistant sleeve 7 is to increase the pressure resistance.

[0029] Specifically, Figure 2 As shown, the injection sleeve 6 includes a first cylindrical portion 61 and a first truncated cone portion 62, and the pressure-resistant sleeve 7 is a metal piece and wraps the first cylindrical portion 61, and the metal piece is made of steel; the external leakage portion, the sealing ring 4 and the sealing sleeve 5 are all located in the first cylindrical portion 61, and the pressure-resistant sleeve 7 is used to ensure the pressure resistance of the sealing portion. The material used in the injection sleeve 6 is the same as the outer skin material of the transmission cable 12, which can achieve component attachment and sealing effects.

[0030] Specifically, Figure 2As shown, the overall cabin penetration sealing structure of the transmission cable also includes a bend limiting sleeve 8 that wraps the pressure-resistant sleeve 7, the first truncated cone portion and the transmission cable 12; the bend limiting sleeve 8 is made of polyurethane material, and includes a second cylindrical portion 81 and a second truncated cone portion 82, the second cylindrical portion 81 includes the pressure-resistant sleeve 7 and part of the first truncated cone portion, and the second truncated cone portion 82 includes the remaining first truncated cone portion and a certain length of the transmission cable 12; the bend limiting sleeve 8 is used to further increase its bending resistance.

[0031] In this embodiment, if Figure 2-Figure 6 As shown, in order to increase the firmness and sealing of the connection between the injection sleeve 6 and the plug housing 1 and the locking nut 3. A plurality of first annular grooves 11 are provided on the outer side of the plug housing 1 wrapped by the injection sleeve 6, and a plurality of second annular grooves 33 are provided on the outer side of the external leakage section 32 wrapped by the injection sleeve 6. The inner wall of the injection sleeve 6 is embedded in the first annular groove 11 and the second annular groove 33 during injection molding, so that part of the inner wall of the injection sleeve 6 is embedded in the first annular groove 11 and the second annular groove 33, thereby increasing its sealing and connection firmness.

[0032] In this embodiment, if Figure 2 and Figure 4 As shown, the end of the locking sleeve 2 near the locking nut 3 is a truncated cone structure and the cross section of the locking sleeve 2 is C-shaped, that is, a groove is provided on the side wall of the locking sleeve 2, and a plurality of annular protrusions 21 are provided on the inner wall of the locking sleeve 2. When the truncated cone structure is plugged into the insertion section 31, the locking sleeve 2 will shrink and deform due to the wedge-shaped fit between the two. When shrinking and deforming, the annular protrusions 21 will be embedded in the outer skin of the transmission cable 12, so as to hold the transmission cable 12 tightly. In order to ensure the stability of the locking sleeve 2 installed in the plug core housing 1, as shown in FIG. Figure 3 and Figure 4 As shown, two limiting protrusions 22 are provided on the end surface of the locking sleeve 2 away from the truncated cone structure, a limiting protrusion ring 13 is provided in the plug core housing 1, and a limiting groove 14 for inserting the limiting protrusion 22 is provided on the limiting protrusion ring 13; after the limiting protrusion ring 13 is inserted into the limiting groove 14, the position of the locking sleeve 2 relative to the plug core housing 1 is fixed, so that when the locking nut 3 is screwed in and locked, the locking sleeve 2 will not rotate.

[0033] In this embodiment, if Figure 1 , Figure 2 , Figure 6 As shown, a plurality of outer ring grooves 15 are provided on the outer side of the plug core housing 1 away from the injection molding sleeve 6, and the outer ring grooves 15 are inserted into the PU tube 9 and a buckle ring 10 is provided on the outer side of the PU tube 9 at a position corresponding to the outer ring grooves 15. The buckle ring 10 is used to deform the PU tube 9 and embed it into the outer ring grooves 15, so as to achieve the purpose of sealing the PU tube 9 and the plug core housing 1. The optical fiber hydrophone array is placed inside the PU tube 9.

[0034] The assembly principle of the transmission cable integral cabin penetration sealing structure of this embodiment is: first install the sealing ring 4 and the sealing sleeve 5 on the locking nut 3, then install the locking sleeve 2 in the plug core shell 1 through the cooperation of the limiting protrusion 22 and the limiting groove 14, and install the locking nut 3 on the plug core shell 1, then pass the transmission cable 12 through the locking nut 3, the locking sleeve 2 and the plug core shell 1 and enter the specified position inside the fiber optic hydrophone, tighten the locking nut 3 with a wrench, so that the locking sleeve 2 holds the transmission cable 12 tightly. Then, a crimping machine is used to crimp the locking nut 3 at the position of the sealing sleeve 5, so that the sealing sleeve 5 locks the transmission cable 12 to ensure the sealing effect; the outer skin of the transmission cable 12 is polished, and injection molding is performed through an injection mold to form an injection molding sleeve 6. The outer skin of the transmission cable 12 is polished to ensure that the injection molding sleeve 6 is better integrated with the transmission cable; the outer ring groove section of the plug shell 1 is plugged into the PU tube 9, and after the optical fiber and components inside the fiber optic hydrophone are fused, the crimping ring 10 is crimped to make the plug shell 1 and the PU tube 9 sealed and assembled; finally, the pressure-resistant sleeve 7 and the bending-limiting sleeve 8 are installed; the fiber optic hydrophone array is placed in the PU tube 9.

[0035] The overall cabin penetration sealing structure of the transmission cable provided in this embodiment solves the cabin penetration sealing problem of the entire transmission cable 12, has a multiple, reliable and reasonable sealing structure, and is resistant to high water pressure, and is suitable for deep-sea fiber optic hydrophone arrays.

[0036] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A transmission cable integral cabin sealing structure, characterized in that: include: A plug core housing (1), a locking sleeve (2), a locking nut (3), a sealing ring (4), a sealing sleeve (5), an injection molding sleeve (6) and a pressure-resistant sleeve (7); the locking sleeve (2) is arranged in the plug core housing (1); a transmission cable (12) passes through the locking sleeve (2); the locking nut (3) is sleeved on the transmission cable; the locking nut (3) comprises an insertion section (31) and an external leakage section (32); the insertion section (31) is plugged into the locking sleeve (2) and the plug core housing. (1) so that the locking sleeve (2) and the transmission cable (12) are tightly held; the outer side of the insertion section (31) and the inner wall of the plugging core shell (1) are sealed by a sealing ring (4), and the inner side of the external leakage section (32) and the transmission cable (12) are sealed by a sealing sleeve (5); the injection molding sleeve (6) wraps part of the plugging core shell (1), the external leakage section (32) and the transmission cable (12); the pressure-resistant sleeve (7) is arranged on the outer side of the injection molding sleeve (6).

2. The transmission cable integral cabin penetration sealing structure according to claim 1, characterized in that: The injection molding sleeve (6) comprises a first cylindrical portion (61) and a first truncated cone portion (62), and the pressure-resistant sleeve (7) is a metal part and wraps around the first cylindrical portion (61).

3. The transmission cable integral cabin penetration sealing structure according to claim 2, characterized in that: It also includes a bending limiter sleeve (8) that wraps the pressure-resistant sleeve (7), the first truncated cone portion, and the transmission cable (12); the bending limiter sleeve (8) includes a second cylindrical portion (81) and a second truncated cone portion (82).

4. The transmission cable integral cabin penetration sealing structure according to claim 3, characterized in that: The bending limiting sleeve (8) is made of polyurethane.

5. The transmission cable integral cabin penetration sealing structure according to any one of claims 1 to 4, characterized in that: The outer side of the plugging core housing (1) wrapped by the injection sleeve (6) is provided with a plurality of first annular grooves (11), the outer side of the external leakage section (32) wrapped by the injection sleeve (6) is provided with a plurality of second annular grooves (33), and the inner wall of the injection sleeve (6) is embedded in the first annular grooves (11) and the second annular grooves (33) during injection molding.

6. The transmission cable integral cabin penetration sealing structure according to claim 5, characterized in that: The locking sleeve (2) has a truncated cone structure and a C-shaped cross section. The inner wall of the locking sleeve (2) is provided with a plurality of annular protrusions (21).

7. The transmission cable integral cabin penetration sealing structure according to claim 6, characterized in that: The end surface of the locking sleeve (2) is provided with a limiting protrusion (22), the plug core housing (1) is provided with a limiting protrusion ring (13), and the limiting protrusion ring (13) is provided with a limiting groove (14) for inserting the limiting protrusion (22).

8. The transmission cable integral cabin penetration sealing structure according to claim 7, characterized in that: An outer ring groove (15) is provided on the outer side of one end of the plug core housing (1) away from the injection molding sleeve (6); the outer ring groove (15) is inserted into the PU tube (9) and a buckling ring (10) is provided on the outer side of the PU tube (9) at a position corresponding to the outer ring groove (15).

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