阅读说明：本技术 一种用于深海光电缆高压试验的密封件 (Sealing element for deep sea optical cable high-voltage test ) 是由 谢锋 刘成 许旗 陆波 于 2020-05-13 设计创作，主要内容包括：本发明涉及高压密封技术领域,尤其是一种用于深海光电缆高压试验的密封件。其包括水密接头本体,水密接头本体内部设有水密腔,水密腔内设有橡胶密封芯,橡胶密封芯套装在受测电缆的电缆塑胶层上,橡胶密封芯上下方分别设有上压块和下垫块,上压块和下垫块套装在受测电缆外表面上。本发明在压力筒筒帽内进行受测电缆的高压试验的时,外六角螺母向上压块提供轴向向下的压紧力,上压块受压后通过与橡胶密封芯的圆锥形配合端面传递压力,使得橡胶密封芯产生径向变形,橡胶密封芯产生的径向变形与受测电缆之间产生水密密封效果。(The invention relates to the technical field of high-pressure sealing, in particular to a sealing element for a high-pressure test of a deep sea optical cable. It includes the watertight joint body, and the watertight connects the inside watertight chamber that is equipped with of body, and the watertight intracavity is equipped with the sealed core of rubber, and the sealed core suit of rubber is equipped with briquetting and lower cushion respectively on the cable plastic layer of survey cable about the sealed core of rubber, goes up briquetting and lower cushion suit and on survey cable surface. When the high-pressure test of the tested cable is carried out in the pressure cylinder barrel cap, the outer hexagon nut provides an axial downward pressing force to the upper pressing block, the upper pressing block transmits pressure through the conical matching end face of the rubber sealing core after being pressed, so that the rubber sealing core generates radial deformation, and the radial deformation generated by the rubber sealing core and the tested cable generate a watertight sealing effect.)

1. A sealing member for deep sea optical cable high-pressure test comprises a watertight connector body (100), and is characterized in that: an external thread mounting section (110) is arranged on the outer surface of the water-tight joint body (100), and the water-tight joint body (100) is in threaded connection with the internal thread section of the pressure cylinder cap through the external thread mounting section (110); a tested cable (200) for performing a high-pressure test in the pressure cylinder cap extends into the watertight connector body (100) from the opening at the lower end of the watertight connector body (100) and extends out from the opening at the upper end of the watertight connector body (100);

a watertight cavity is arranged in the watertight connector body (100), a rubber sealing core (300) is arranged in the watertight cavity, the rubber sealing core (300) is sleeved on a cable plastic layer (220) of the tested cable (200), an upper pressing block (400) and a lower cushion block (500) are respectively arranged above and below the rubber sealing core (300), and the upper pressing block (400) and the lower cushion block (500) are sleeved on the outer surface of the tested cable (200);

an upper compression part (310) is arranged at the upper end part of the rubber sealing core (300), an upper pressurizing part (410) is arranged at one end of the upper pressing block (400) facing the rubber sealing core (300), an upper pressurizing cavity is arranged in the upper pressurizing part (410), the upper compression part (310) of the rubber sealing core (300) extends into the upper pressurizing cavity of the upper pressing block (400), and the outer surface of the upper compression part (310) is matched and connected with the inner surface of the upper pressurizing part (410);

the lower end part of the rubber sealing core (300) is provided with a lower pressed part (320), one end of the lower cushion block (500) facing the upper part of the rubber sealing core (300) is provided with a lower pressing part (510), a lower pressing cavity is arranged in the lower pressing part (510), the lower pressed part (320) of the rubber sealing core (300) extends into the lower pressing cavity of the lower cushion block (500), and the outer surface of the lower pressed part (320) is matched and connected with the inner surface of the lower pressing part (510);

the inside nut installation cavity that is equipped with of watertight joint body (100), the nut installation cavity is located the top in watertight cavity, is equipped with outer hexagon nut (600) in the nut installation cavity, outer hexagon nut (600) surface is equipped with external screw thread linkage section (620), and nut installation cavity inside wall is equipped with internal thread installation section (120), and outer hexagon nut (600) are connected on internal thread installation section (120) through external screw thread linkage section (620) to tip compresses tightly downwards on last briquetting (400) under outer hexagon nut (600).

2. The sealing member for the high-voltage test of the deep sea optical cable according to claim 1, wherein: the hardness value of the rubber sealing core (300) is 60-70 Shore hardness.

3. The sealing member for the high-voltage test of the deep sea optical cable according to claim 1, wherein: the upper pressure receiving part (310) and the upper pressure cavity are both in a cone frustum structure.

4. The sealing member for high-pressure test of deep sea optical cable according to claim 1 or 3, wherein: the lower pressure part (320) and the lower pressure cavity are both in a cone frustum structure.

5. The sealing member for the high-voltage test of the deep sea optical cable according to claim 1, wherein: be equipped with the thrust chamber in outer hexagon nut (600), be equipped with thrust piece (800) in the thrust chamber, thrust piece (800) suit is on the cable copper line layer (210) that is exposed outside in measured cable (200) middle part position, the upper and lower below of thrust piece (800) is equipped with insulating block (910) and insulating block (920) down respectively, go up insulating block (910) and insulating block (920) suit down on cable plastic layer (220) of measured cable (200), go up insulating block (910) and including insulating block (920) wraps up the centre gripping from top to bottom with thrust piece (800) down for thrust piece (800) and outside are insulating.

6. The sealing member for the deep sea cable high voltage test according to claim 5, wherein: be equipped with the nut installation cavity in outer hexagon nut (600), the nut installation cavity is located thrust chamber top, be equipped with hexagon nut (700) in the nut installation cavity, hexagon nut (700) surface is equipped with hexagon nut installation screw thread section (710), be equipped with on the nut installation cavity lateral wall of outer hexagon nut (600) female connection section (610), hexagon nut (700) is connected on female connection section (610) through hexagon nut installation screw thread section (710), the tip compresses tightly downwards on last insulating block (910) under hexagon nut (700).

Technical Field

The invention relates to the technical field of high-pressure sealing, in particular to a sealing element for a high-pressure test of a deep sea optical cable.

Background

At present, the sealing method used in the test of the strength stability and the sealing performance of a test piece of a test structure in an underwater engineering structure laboratory mainly comprises two methods: one is that the connector uses O-ring seal, the O-ring seal is generally used in high-pressure test above 45MPa, only supports cable butt joint, does not support optical cable, has certain limitation; the other is to use rubber to extrude the structural test piece up and down to seal, however, practice proves that the sealing form can only be used for cables with the diameter of less than 5mm, the test pressure must be lower than 45MPa, and if the overpressure is used in excess of the diameter, the phenomenon that the cables cannot be sealed and flee outwards in the test process can occur.

With the development of electronic networks between countries, human beings lay an integrated optical and electrical communication cable between land separated from the sea to the bottom of the sea. However, a series of problems are encountered when conducting simulation verification tests on land: how to extend the submarine cable out of the pressure vessel to communicate without affecting the optoelectronic performance? How to ensure that a large-diameter submarine cable can ensure sealing and withstand a water pressure of 100 MPa? Therefore, a set of sealing element which can effectively seal under a high-pressure environment and ensure the photoelectric property of the large-diameter submarine cable must be designed.

Disclosure of Invention

The sealing piece for the high-voltage test of the deep sea optical cable can be applied to the watertight sealing of the deep sea optical cable with the diameter of 10-20 mm under the pressure test environment of 0-100 MPa, and meanwhile, the photoelectric performance of the deep sea optical cable can be guaranteed not to be affected.

The technical scheme adopted by the invention is as follows:

a sealing element for a deep sea optical cable high-pressure test comprises a watertight connector body, wherein an external thread installation section is arranged on the outer surface of the watertight connector body, and the watertight connector body is in threaded connection with an internal thread section of a pressure cylinder cap through the external thread installation section; a tested cable for performing a high-pressure test in the pressure cylinder cap extends into the watertight connector body from the opening at the lower end of the watertight connector body and extends out from the opening at the upper end of the watertight connector body;

the watertight connector comprises a watertight connector body, a watertight cavity, a rubber sealing core, an upper pressing block and a lower cushion block, wherein the watertight cavity is arranged in the watertight connector body;

the upper end part of the rubber sealing core is provided with an upper compression part, one end of the upper pressing block facing the rubber sealing core is provided with an upper compression part, an upper compression cavity is arranged in the upper compression part, the upper compression part of the rubber sealing core extends into the upper compression cavity of the upper pressing block, and the outer surface of the upper compression part is in fit connection with the inner surface of the upper compression part;

the lower end part of the rubber sealing core is provided with a lower pressed part, one end of the lower cushion block facing the rubber sealing core is provided with a lower pressed part, a lower pressed cavity is arranged in the lower pressed part, the lower pressed part of the rubber sealing core extends into the lower pressed cavity of the lower cushion block, and the outer surface of the lower pressed part is matched and connected with the inner surface of the lower pressed part;

the inside nut installation cavity that is equipped with of watertight joint body, the nut installation cavity is located the top in watertight cavity, is equipped with outer hexagon nut in the nut installation cavity, outer hexagon nut surface is equipped with the external thread connection section, and nut installation cavity inside wall is equipped with the internal thread installation section, and outer hexagon nut passes through the external thread connection section to be connected on the internal thread installation section to outer hexagon nut tip compresses tightly downwards on last briquetting.

Furthermore, the hardness value of the rubber sealing core is 60-70 Shore hardness.

Furthermore, the upper pressure part and the upper pressure cavity are both in a cone frustum structure.

Furthermore, the lower pressure part and the lower pressure cavity are both in a cone frustum structure.

Further, be equipped with the thrust chamber in the outer hexagon nut, the thrust intracavity is equipped with the thrust piece, and the thrust piece suit exposes on outer cable copper wire layer in survey cable middle part position, and the upper and lower below of thrust piece is equipped with insulating block and lower insulating block respectively, goes up the insulating block and on the cable plastic layer of survey cable with insulating block suit down, goes up including insulating block and lower insulating block parcel centre gripping about with the thrust piece for thrust piece and outside are insulating.

Further, be equipped with the nut installation cavity in the outer hexagon nut, the nut installation cavity is located thrust chamber top, is equipped with hexagon nut in the nut installation cavity, and hexagon nut installation thread section in the interior surface is equipped with, is equipped with the female connection section on outer hexagon nut's the nut installation cavity lateral wall, and hexagon nut in the interior passes through hexagon nut installation thread section to be connected in the female connection section, and the tip compresses tightly downwards on last insulating block under the hexagon nut.

The invention has the following beneficial effects:

the invention has compact and reasonable structure and convenient operation, when the high-pressure test of the tested cable is carried out in the pressure cylinder barrel cap, the outer hexagon nut provides an axial downward pressing force to the upper pressing block, the upper pressing block transmits the pressure through the conical matching end surface of the rubber sealing core after being pressed, so that the rubber sealing core generates radial deformation, and the radial deformation generated by the rubber sealing core and the watertight sealing effect are generated between the rubber sealing core and the tested cable; the thrust block is arranged on the cable copper wire layer exposed outside the middle position of the tested cable, so that the friction force between the thrust block and the cable copper wire layer is improved, and the axial outward movement of the tested cable in the test process can be greatly reduced; the upper and lower insulating blocks are respectively arranged on the thrust block, and the upper and lower insulating blocks realize the insulating wrapping of the thrust block.

Drawings

FIG. 1 is a half-sectional view of the present invention.

FIG. 2 is a half sectional view of the rubber sealing core of the present invention.

FIG. 3 is a semi-sectional view of the upper press block and the lower cushion block of the present invention.

Wherein: 100. a watertight joint body; 110. an external thread mounting section; 120. an internal thread mounting section; 200. a cable under test; 210. a cable copper wire layer; 220. a cable plastic layer; 300. a rubber seal core; 310. an upper pressure receiving portion; 320. a pressed part; 400. pressing the blocks; 410. an upper pressurization part; 500. a lower cushion block; 510. a lower pressurization part; 600. an outer hexagonal nut; 610. an internal threaded connection section; 620. an external thread connecting section; 700. a hexagon socket nut; 710. installing a thread section on the inner hexagon nut; 800. a thrust block; 910. an upper insulating block; 920. and a lower insulating block.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1, the present invention mainly includes a water-sealing joint body 100, and an external thread installation section 110 is provided on an outer surface of the water-sealing joint body 100. When a deep sea optical cable high-pressure test is carried out, the watertight connector body 100 is in threaded connection with the internal thread section of the pressure cylinder cap through the external thread installation section 110, and therefore the installation of the watertight connector body 100 is achieved.

As shown in fig. 1, a tested cable 200 for performing a high-pressure test in the pressure cylinder cap extends into the watertight connector body 100 from the lower end opening of the watertight connector body 100, and extends out from the upper end opening of the watertight connector body 100.

In order to realize watertight sealing of the tested cable 200 inside the watertight connector body 100, as shown in fig. 1, a watertight cavity is arranged inside the watertight connector body 100, a rubber sealing core 300 is arranged in the watertight cavity, the rubber sealing core 300 is sleeved on a cable plastic layer 220 of the tested cable 200, an upper press block 400 and a lower cushion block 500 are respectively arranged above and below the rubber sealing core 300, and the upper press block 400 and the lower cushion block 500 are sleeved on the outer surface of the tested cable 200.

As shown in fig. 2 and 3, an upper pressure part 310 with a truncated cone structure is provided at the upper end of the rubber seal core 300, an upper pressure part 410 is provided at the upper end of the upper pressing block 400 facing the rubber seal core 300, an upper pressure chamber with a truncated cone structure is provided in the upper pressure part 410, the upper pressure part 310 of the rubber seal core 300 extends into the upper pressure chamber of the upper pressing block 400, and the outer surface of the upper pressure part 310 is engaged with the inner surface of the upper pressure part 410.

As shown in fig. 2 and 3, the lower end of the rubber seal core 300 is provided with a lower pressure part 320 having a truncated cone structure, the lower end of the lower cushion block 500 facing the rubber seal core 300 is provided with a lower pressure part 510, the lower pressure part 510 is provided with a lower pressure cavity having a truncated cone structure, the lower pressure part 320 of the rubber seal core 300 extends into the lower pressure cavity of the lower cushion block 500, and the outer surface of the lower pressure part 320 is engaged with the inner surface of the lower pressure part 510.

The hardness value of the rubber sealing core 300 is 60-70 Shore hardness, and the sealing effect of the rubber sealing core 300 can achieve the best effect within the value range.

As shown in fig. 1, a nut installation cavity is arranged inside the watertight connector body 100, the nut installation cavity is located above the watertight cavity, and an outer hexagon nut 600 is arranged in the nut installation cavity. Outer hexagon nut 600 surface is equipped with external screw thread linkage section 620, and nut installation cavity inside wall is equipped with internal thread installation section 120, and outer hexagon nut 600 passes through external screw thread linkage section 620 to be connected on internal thread installation section 120 to outer hexagon nut 600 lower tip compresses tightly downwards on last briquetting 400.

As shown in fig. 1, a thrust cavity is arranged in the outer hexagon nut 600, a thrust block 800 is arranged in the thrust cavity, and the thrust block 800 is sleeved on the cable copper wire layer 210 exposed outside at the middle position of the tested cable 200. An upper insulating block 910 and a lower insulating block 920 are respectively arranged above and below the thrust block 800, the upper insulating block 910 and the lower insulating block 920 are sleeved on the cable plastic layer 220 of the tested cable 200, and the thrust block 800 is wrapped and clamped up and down by the upper insulating block 910 and the lower insulating block 920, so that the thrust block 800 is insulated from the outside.

As shown in fig. 1, a nut installation cavity is arranged in the outer hexagon nut 600, the nut installation cavity is located above the thrust cavity, and an inner hexagon nut 700 is arranged in the nut installation cavity. The outer surface of the hexagon socket nut 700 is provided with a hexagon socket nut mounting thread section 710, the side wall of the nut mounting cavity of the outer hexagon nut 600 is provided with an internal thread connecting section 610, the hexagon socket nut 700 is connected to the internal thread connecting section 610 through the hexagon socket nut mounting thread section 710, and the lower end of the hexagon socket nut 700 is pressed downwards on the upper insulating block 910.

The working principle of the invention is as follows: when a high-pressure test of the tested cable 200 is carried out in the pressure cylinder barrel cap, the outer hexagon nut 600 provides an axial downward pressing force for the upper pressing block 400, the upper pressing block 400 transmits pressure through the conical matching end face of the rubber sealing core 300 after being pressed, the lower cushion block 500 transmits pressure to the rubber sealing core 300 through the matching of the conical matching end face of the rubber sealing core 300, the rubber sealing core 300 generates radial deformation under the upper and lower pressures, and a watertight sealing effect is generated between the radial deformation generated by the rubber sealing core and the tested cable. Simultaneously, set up thrust block 800 on the cable copper line layer 210 that exposes outside at cable 200 middle part position that receives, improved thrust block 800 and cable copper line layer 210's frictional force, can greatly reduced test in-process cable 200 takes place the condition emergence of scurrying outward of axle. Meanwhile, the thrust block 800 is provided with upper and lower insulating blocks 910 and 920 for insulation.

The above description is intended to be illustrative and not restrictive, and the scope of the invention is defined by the appended claims, which may be modified in any manner within the scope of the invention.