Underwater connector oil charging device and method based on cock sealing

Abstract

The invention discloses an underwater connector oil charging device and method based on cock sealing, and the oil charging device comprises a socket end oil charging device for charging oil to a connector socket end and a plug end oil charging device for charging oil to a connector plug end. The socket end oil charging device can be connected with the connector socket end and enables the two first oil charging passages to be communicated with the sealed accommodating cavity of the connector socket end, so that the connector socket end can be charged with oil through the first oil charging passages, and oil charging can be realized only by installing the connector socket end oil charging device and the socket end in place and opening an oil charging pump; the plug end oil charging device can be connected with the connector plug end and enables the two second oil charging passages to be communicated with the sealed cavity of the connector plug end, so that the connector plug end can be charged with oil through the second oil charging passages, and oil charging can be performed only by installing the connector plug end oil charging device and the plug end in place and opening an oil charging pump. The oil filling operation is simple, the oil filling efficiency is improved, the oil filling amount can be ensured, and bubbles are avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of oil filling of a sealed cavity of an underwater connector sealed with a plug, and in particular, relates to an oil filling device and method for an underwater connector based on a plug seal. Background Art

[0002] As an important component of underwater engineering projects, underwater plug connectors are widely used in seabed observation networks, submarine oil and gas projects, ocean energy development and various types of submarine engineering equipment. With the construction and implementation of national submarine engineering projects and the gradual development of ocean energy strategic resources, the demand for underwater plug connectors is increasing, and higher requirements are also put forward for reliability and service life. At present, one of the underwater plug connectors with relatively high application reliability is the connector based on the principle of plug dynamic sealing, which is mainly used to realize the coupling of optical fibers.

[0003] The connector based on the principle of rotary plug dynamic seal includes a plug end and a socket end. The plug end and the socket end each contain two rotatable cylindrical elastic sealing plugs. The axial end face of the sealing plug has a part of the sector protruding from the installation position, and the sealing plug is radially opened with a through hole of the connection unit. When the plug end and the socket end are initially connected, the protruding sectors of the plug end and the socket end are cylindrically extruded to form an end face seal. The plug end continues to be axially inserted into the socket end. Under the action of the driving member, the two sealing plugs rotate synchronously in the opposite direction, the through hole is connected, and the plug end continues to be axially inserted, realizing the coupling of the connection unit.

[0004] The connector based on the principle of plug dynamic seal realizes the coupling and separation of the connection unit in a closed state through the plug dynamic seal mechanism, and the whole process is completely isolated from seawater. Therefore, how to construct a reliable seal of the plug dynamic seal principle connector is the core key to determine the performance and reliability of the underwater plug-in connector, and it is also the focus of the research and development process. The plug dynamic seal principle connector is divided into a plug end and a socket end. The plug end and the socket end each contain a corresponding optical fiber or electrical coupling connection unit. When the connector is separated, the optical fiber or electrical connection unit is sealed in its own cavity. When docking, the plug end connection unit is inserted into the socket end sealed cavity under the action of the dynamic seal mechanism to achieve coupling. The respective sealed cavities of the plug end and the socket end of the connector are filled with oil, and the sealed cavity contains a soft elastic sac cavity structure. Under the action of seawater pressure, the deformation of the soft elastic sac cavity realizes the approximate balance of the oil pressure in the sealed cavity and the seawater pressure, preventing the intrusion of seawater due to the internal and external pressure difference (the seawater pressure is greater than the oil pressure in the cavity), and at the same time avoiding the additional plug-in force caused by the internal and external pressure difference. Therefore, effectively achieving a balance or positive pressure difference between the oil pressure in the sealing chamber and the seawater environment pressure is the key to ensuring reliable sealing of the underwater plug-in connector.

[0005] At present, the replacement and filling of oil in the sealing cavity at the plug end and the socket end of the connector based on the plug dynamic seal principle are all carried out by extracting and filling with a needle at the radial channel of the cylindrical sealing plug. Due to the high viscosity of the filling oil and the complex cavity structure in the cavity, the use of a needle is cumbersome, and the cylindrical sealing plug needs to be manually rotated, which may require multiple operations, and there is a problem of incomplete filling and bubbles.

[0006] In addition, bubbles of various sizes are easily generated during the syringe filling process. It takes a long time to exhaust the bubbles by static method, and it is not easy to exhaust them completely. If a connector containing bubbles is lowered into the deep sea, gas explosion will occur under the action of seawater pressure, resulting in a pressure difference between the inside and the outside, and seawater will penetrate, affecting the reliable application of the connector.

[0007] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0008] The invention proposes an underwater connector oil filling device and method based on cock sealing, so as to solve the technical problem that the existing oil filling device and method have complex operation.

[0009] In order to achieve the above invention / design purpose, the present invention adopts the following technical solutions: An underwater connector oil filling device based on cock sealing, the oil filling device comprising: The socket end oil filling device is used to fill the connector socket end with oil; the socket end oil filling device comprises: first shell; A first inner core is located in the first outer shell and fixedly connected to the first outer shell, and the first inner core is provided with a drive member shuttle hole; Two first oil-filled passages are located in the first inner core; Two first cylindrical sealing plugs, corresponding to the two first oil filling passages respectively, the first cylindrical sealing plugs and the first inner core are rotatably assembled, the first cylindrical sealing plugs include a plurality of first through holes, and the first cylindrical sealing plugs can be rotated to a state where the first through holes are connected or disconnected with the first oil filling passages; at least one first one-way valve, configured to be installed on the first oil filling passage; The plug end oil filling device is used to fill the plug end of the connector with oil; the plug end oil filling device comprises: Second shell; A second inner core is located in the second outer shell and is slidably connected to the second outer shell, an elastic buffer element is provided between the second inner core and the second outer shell, and a drive member shuttle hole is provided in the second inner core; two second oil-filled passages, located in the second inner core; Two second cylindrical sealing plugs, corresponding to the two second oil filling passages respectively, the second cylindrical sealing plugs and the second inner core are rotatably assembled, the second cylindrical sealing plugs include a plurality of second through holes, and the second cylindrical sealing plugs can be rotated to a state where the second through holes are connected or disconnected with the second oil filling passages; A driving member, used for driving the second cylindrical sealing plug to rotate, penetrating the second inner core and capable of shuttling in the driving member shuttle hole; at least one second one-way valve, installed on the second oil filling passage; An oil filling pump is used to supply oil to the first oil filling passage or the second oil filling passage.

[0010] In the above-mentioned underwater connector oil filling device based on cock seal, the outlet end of the first oil filling passage is connected with a first slit, and the first cylindrical sealing plug can be rotated to a state where the first through hole is connected or not connected with the first slit; the outlet end of the second oil filling passage is connected with a second slit, and the second cylindrical sealing plug can be rotated to a state where the second through hole is connected or not connected with the second slit. In the above-mentioned underwater connector oil filling device based on cock seal, the first inner core is provided with an alignment guide groove, and the second inner core is provided with a positioning protrusion; or, the second inner core is provided with an alignment guide groove, and the first inner core is provided with a positioning protrusion.

[0011] As described above, in the underwater connector oil filling device based on plug seal, a first limiting flange is provided in the middle of the first shell.

[0012] As described above, in the underwater connector oil filling device based on plug seal, the first inner core is provided with a first cylindrical hole, the first cylindrical sealing plug is located in the first cylindrical hole and is press-fitted by a first pressure cover; the second inner core is provided with a second cylindrical hole, the second cylindrical sealing plug is located in the second cylindrical hole and is press-fitted by a second pressure cover.

[0013] As described above, in the underwater connector oil filling device based on cock sealing, both the first cylindrical sealing plug and the second cylindrical sealing plug are provided with ear handles.

[0014] As described above, in the underwater connector oil filling device based on the plug seal, a concave groove is provided on the outer side of the end of the first outer shell; a circular ring-shaped convex claw is installed on the end of the second inner core, and the circular ring-shaped convex claw is slidably assembled with the second outer shell, and the inner side of the end of the second outer shell has a blocking surface for blocking the movement of the circular ring-shaped convex claw when expanding outward.

[0015] As described above, the underwater connector oil filling device based on cock seal, the socket end oil filling device includes a first handle installed on the first shell; the plug end oil filling device includes a second handle installed on the second shell.

[0016] The oil filling method of the underwater connector oil filling device based on the plug seal as described above, the oil filling method of the connector socket end is: The socket end oil filling device is connected to the connector socket end, and the two first oil filling passages of the socket end oil filling device are connected to the sealed volume cavity of the connector socket end; A first one-way valve is installed in one first oil filling passage and connected to an oil filling pump to fill oil until the filled oil overflows from another first oil filling passage; Expel micro bubbles from the oil; The socket end oil filling device is separated from the connector socket end, and the sealing cavity of the connector socket end is sealed; The oil filling method of the connector plug end is: The plug-end oil filling device is connected to the connector plug end, and the two second oil filling passages of the plug-end oil filling device are connected to the sealed volume cavity of the connector plug end; A second one-way valve is installed in one second oil filling passage and connected to an oil filling pump to fill oil until the filled oil overflows from another second oil filling passage; Expel micro bubbles from the oil; The plug end oil filling device and the connector plug end are separated, and the sealing cavity of the connector plug end is sealed.

[0017] As described above, in the oil filling method of the underwater connector oil filling device sealed with a plug, in the oil filling method at the connector socket end, after the microbubbles in the oil are discharged, a plug or a first one-way valve can be installed on another first oil filling passage to control the oil filling pump to continue filling the oil to the set pressure; In the oil filling method of the connector plug end, after the microbubbles in the oil are discharged, a plug or a second one-way valve can be installed on another second oil filling passage to control the oil filling pump to continue filling the oil to the set pressure.

[0018] Compared with the prior art, the advantages and positive effects of the present invention are: The underwater connector oil filling device based on the plug seal of the present invention comprises a socket end oil filling device for filling the connector socket end with oil and a plug end oil filling device for filling the connector plug end with oil. The socket end oil filling device can be connected to the connector socket end and make the two first oil filling passages communicate with the sealed cavity of the connector socket end. Therefore, the connector socket end can be filled with oil through the first oil filling passage, and it is only necessary to install the connector socket end oil filling device and the socket end in place and turn on the oil filling pump to fill the oil; the plug end oil filling device can be connected to the connector plug end and make the two second oil filling passages communicate with the sealed cavity of the connector plug end. Therefore, it is only necessary to install the connector plug end oil filling device and the plug end in place and turn on the oil filling pump to fill the oil. The oil filling operation of the present invention is simple, the oil filling efficiency is improved, the oil filling amount can be guaranteed to be full, and bubbles are avoided.

[0019] The invention discloses an underwater connector oil filling method based on a plug seal: the oil filling method of the connector socket end is as follows: the socket end oil filling device is connected to the connector socket end, and the two first oil filling passages of the socket end oil filling device are connected to the sealed volume cavity of the connector socket end; a first one-way valve is installed in one first oil filling passage and an oil filling pump is connected to fill oil until the filled oil overflows from another first oil filling passage; micro bubbles in the oil are discharged; the socket end oil filling device is separated from the connector socket end, and the sealed volume cavity of the connector socket end is sealed; the oil filling method of the connector plug end is as follows: the plug end oil filling device is connected to the connector plug end, and the two second oil filling passages of the plug end oil filling device are connected to the sealed volume cavity of the connector plug end; a second one-way valve is installed in one second oil filling passage and an oil filling pump is connected to fill oil until the filled oil overflows from another second oil filling passage; micro bubbles in the oil are discharged; the plug end oil filling device is separated from the connector plug end, and the sealed volume cavity of the connector plug end is sealed. The oil filling method is simple to operate, improves oil filling efficiency, and the oil filling amount can be guaranteed to be full to avoid bubbles.

[0020] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of a socket end oil filling device according to a specific embodiment of the present invention.

[0023] Figure 2 Figure 1 Exploded diagram of .

[0024] Figure 3 Schematic diagram of the end face of the first inner core.

[0025] Figure 4 yes Figure 3 Section view along AA direction.

[0026] Figure 5 yes Figure 3 Cross-sectional view along BB direction.

[0027] Figure 6 It is a cross-sectional view before the socket end oil filling device is connected to the socket end.

[0028] Figure 7 This is a cross-sectional view of the socket end oil filling device connected to the socket end ( Figure 7 The section direction and Figure 6 The cross-sectional direction is 90 degrees).

[0029] Figure 8 This is an exploded view of the socket end.

[0030] Fig. 9 It is a structural schematic diagram of a socket end oil filling device for filling oil at the socket end.

[0031] Fig.10 It is a schematic diagram of a plug end oil filling device according to a specific embodiment of the present invention.

[0032] Fig.11 yes Fig.10 Exploded diagram of .

[0033] Fig.12 It is a cross-sectional view after the plug end oil filling device is connected to the plug end.

[0034] Fig.13 This is an exploded view of the plug end.

[0035] Fig.14 It is a structural schematic diagram of a plug end oil filling device for filling oil at the plug end.

[0036] In the figure, the oil filling device at the socket end: 1. a first cylindrical sealing plug; 2. a first pressure cover; 3. a fixing screw for the upper pressure cover; 4. a first inner core; 5. a positioning screw for the inner core; 6. a first outer shell; 7. a first one-way valve; 8. a first handle; 9. a fixing nut assembly; 10. a first through hole; 11. a first oil filling passage; 12. a guide groove; 13. a shuttle hole for the lower drive member; 14. a shuttle hole for the upper drive member; 15. a first slit; 17. a fan-shaped body; 18. a concave slot; 23. an ear handle; 25. a first limit flange; 37. a first cylindrical hole.

[0037] Socket end: 11', socket cylindrical sealing plug; 16', positioning protrusion; 19', claw; 20', inclined surface; 21', blocking surface; 22', upper driving member; 24', lower driving member; 26', socket shell end face; 27', sealing cavity; 28', socket inner core; 29', socket gland; 30', socket gland fixing screw; 31', socket annular convex claw; 32', thread; 33', socket shell; 34', limit screw; 35', guide groove; 36', connecting unit; 38', radial through hole; 40', socket circular column hole; 41', elastic buffer element.

[0038] Plug end oil filling device: 11, second cylindrical sealing plug; 16, positioning protrusion; 19, claw; 20, inclined surface; 21, blocking surface; 22, upper driving member; 24, lower driving member; 26, second shell end surface; 28, second inner core; 29, second gland; 30, second gland fixing screw; 31, second annular convex claw; 32, thread; 33, second shell; 34, limit screw; 35, guide groove; 38, second through hole; 40, second cylindrical hole; 41, elastic buffer element; 42, second oil filling passage; 43, second slit; 44, second one-way valve; 45, second handle.

[0039] Connector plug end: 1', plug cylindrical sealing plug; 2', plug gland; 3', plug gland fixing screw; 4', plug inner core; 5', inner core positioning screw; 6', plug shell; 10', plug through hole; 12', guide groove; 13', lower drive member shuttle hole; 14', upper drive member shuttle hole; 18', concave card slot; 23', ear handle; 36, connection unit; 37', plug cylindrical hole; 46', sealed cavity. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 invention.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In the description of the implementation method, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0043] 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.

[0044] In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0045] The invention discloses an underwater connector oil filling device based on cock sealing, comprising a socket end oil filling device for filling oil into the socket end of the connector and a plug end oil filling device for filling oil into the plug end of the connector.

[0046] The socket end oil filling device and the plug end oil filling device are described below in conjunction with the accompanying drawings: like Figure 1-Figure 7 As shown, the socket end oil filling device includes a first outer shell 6, a first inner core 4, two first oil filling passages 11, two first cylindrical sealing plugs 1 and at least one first one-way valve 7.

[0047] The first housing 6 is cylindrical.

[0048] A first limiting flange 25 is provided in the middle of the outer side of the first housing 6 to limit the insertion position of the socket end oil filling device and the socket end.

[0049] A concave slot 18 is disposed on the outer side of the end portion of the first housing 6 .

[0050] The first inner core 4 is located in the first outer shell 6 and is fixedly connected to the first outer shell 6 . Specifically, the first inner core 4 and the first outer shell 6 are fixed by inner core positioning screws 5 .

[0051] The first inner core 4 is provided with a driving member shuttle hole. When the socket end oil filling device is connected to the socket end, the driving member of the socket end shuttles in the driving member shuttle hole.

[0052] In some embodiments, the drive member shuttle hole includes an upper drive member shuttle hole 14 and two lower drive member shuttle holes 13. Figure 8As shown, the socket end includes an upper drive member 22 ′ and two lower drive members 24 ′. The upper drive member 22 ′ shuttles in the upper drive member shuttle hole 14 , and the lower drive member 24 ′ shuttles in the lower drive member shuttle hole 13 .

[0053] Two first oil-filling passages 11 are located in the first inner core 4 .

[0054] In some embodiments, two first oil-filled passages 11 pass through the first inner core 4 .

[0055] In some embodiments, the two first oil-filled passages 11 are located in the axial direction of the first inner core 4 .

[0056] The two first cylindrical sealing plugs 1 correspond to the two first oil-filling passages 11 respectively.

[0057] The first cylindrical sealing plug 1 is rotatably assembled with the first inner core 4 . The first cylindrical sealing plug 1 includes a plurality of first through holes 10 . The first cylindrical sealing plug 1 can be rotated to a state where the first through holes 10 are connected or disconnected with the first oil filling passage 11 .

[0058] The first cylindrical sealing plug 1 is made of an elastomer and is provided with a plurality of radial first through holes 10 .

[0059] The first inner core 4 is provided with a first cylindrical hole 37 , and the first cylindrical sealing plug 1 is located in the first cylindrical hole 37 and is press-fitted by the first gland 2 .

[0060] The first cylindrical sealing plug 1 is inserted into the first cylindrical hole 37 in the first inner core 4, and is installed and fixed by the first pressure cover 2 through the upper pressure cover fixing screws 3. The first cylindrical sealing plug 1 can rotate 90° around its cylindrical axis. After installation, the first inner core assembly is installed as a whole into the first outer shell 6, and is positioned and fixed by the fixing inner core positioning screws 5.

[0061] The first cylindrical sealing plug 1 is provided with an ear handle 23. The ear handle 23 is provided on the top of the first cylindrical sealing plug 1, and the ear handle 23 can facilitate the upper driving member 22' to drive the first cylindrical sealing plug 1 to rotate.

[0062] In some embodiments, an upper drive member shuttle hole 14 is also provided on the first pressing cover 2 .

[0063] The outlet end of the first oil filling passage 11 is connected with a first slit 15 , and the arrangement direction of the first slit 15 is the same as the arrangement direction of the first through holes 10 on the first cylindrical sealing plug 1 . The first slit 15 allows the oil to flow evenly into the first cylindrical sealing plug 1 .

[0064] At least one first one-way valve 7 is installed on the first oil filling passage 11 .

[0065] The first one-way valve 7 can be installed at the inlet end of the first oil filling passage 11 through its own external thread.

[0066] The first inner core 4 is provided with an alignment guide groove 12, and the socket end of the connector is provided with a socket positioning protrusion 16'. The alignment guide groove 12 and the socket positioning protrusion 16' are assembled to facilitate the alignment and installation of the socket end oil filling device and the socket end of the connector.

[0067] In some other embodiments, a positioning protrusion may also be provided on the first inner core 4, and an alignment guide groove may be provided on the socket end of the connector.

[0068] The socket-end oil filling device comprises a first handle 8 mounted on the first housing 6. The first handle 8 is mounted and fixed on the first housing 6 via a fixing nut assembly 9 and is used for operation when the socket-end oil filling device is integrally plugged into and pulled out of the socket end.

[0069] like Fig. 9 As shown, the socket-end oil filling device also includes an oil filling pump, which is used to supply oil to the first oil filling passage 11.

[0070] like Figure 6-Figure 8 As shown, the socket end includes a socket housing 33', a socket core 28', a socket cylindrical sealing plug 11', a driving member and a connecting unit 36'.

[0071] The socket housing 33 ′ is cylindrical with one end closed. A guide groove 35 ′ is provided on the socket housing 33 ′. The guide groove 35 ′ extends along the axial direction of the socket housing 33 ′.

[0072] The socket inner core 28 ′ is located in the socket outer shell 33 ′ and the two are slidably assembled. An elastic buffer element 41 ′ is provided between the socket inner core 28 ′ and the socket outer shell 33 ′.

[0073] A limit screw 34 ′ is installed on the socket inner core 28 ′, and the limit screw 34 ′ is used to assemble with the guide groove 35 ′ to achieve axial relative movement of the socket inner core 28 ′ and the socket shell 33 ′ and limit the movement range.

[0074] The socket inner core 28' has a sealed cavity 27' therein, and the sealed cavity 27' is used to contain oil.

[0075] Two socket cylindrical sealing plugs 11' are mounted on the socket inner core 28' and are used to open or close the sealed chamber 27'.

[0076] The two socket cylindrical sealing plugs 11' are rotatably assembled with the socket inner core 28'. The socket cylindrical sealing plug 11' includes a plurality of through holes 38'. The socket cylindrical sealing plug 11' can be rotated to a state where the through holes are connected or disconnected with the sealing cavity 27'.

[0077] The cylindrical sealing plug 11' of the socket is made of an elastic body and is provided with a plurality of radial through holes 38'.

[0078] The socket inner core 28 ′ is provided with a socket circular column hole 40 ′, and the socket cylindrical sealing plug 11 ′ is installed in the socket circular column hole 40 ′ and is press-fitted through the socket pressure cover 29 ′.

[0079] The socket cylindrical sealing plug 11' is installed in the socket circular column hole 40' in the socket inner core 28', and is installed and fixed by the socket gland 29' through the socket gland fixing screw 30'. The socket cylindrical sealing plug 11' can rotate 90 degrees around its cylindrical axis.

[0080] The driving member is used to drive the first cylindrical sealing plug 1 and the socket cylindrical sealing plug 11 ′ to rotate.

[0081] The driving member includes an upper driving member 22' and two lower driving members 24'. The upper driving member 22' and the lower driving member 24' are both installed in the socket housing 33'.

[0082] The cylindrical sealing plug 11' of the socket is provided with a lug handle. The lug handle is provided at the bottom of the cylindrical sealing plug 11' of the socket, and the lug handle can facilitate the lower driving member 24' to drive the cylindrical sealing plug 11' of the socket to rotate.

[0083] The socket inner core 28 ′ is provided with a socket driving member shuttle hole. When the socket inner core 28 ′ and the socket outer shell 33 ′ move relative to each other, the driving member shuttles in the driving member shuttle hole.

[0084] In some embodiments, the socket drive member shuttle hole includes one socket upper drive member shuttle hole and two socket lower drive member shuttle holes penetrating the socket inner core 28 ′. The upper drive member 22 ′ shuttles in the upper drive member shuttle hole, and the lower drive member 24 ′ shuttles in the lower drive member shuttle hole.

[0085] In some embodiments, a lower drive member shuttle hole is also provided on the socket cover 29'.

[0086] The connecting unit 36 ​​′ is mounted on the socket housing 33 ′ and inserted into the sealed cavity 27 ′ of the socket core 28 ′.

[0087] When the socket cylindrical sealing plug 11' is rotated to the state where the through hole is connected to the sealing cavity 27', and the socket core 28' is moved toward the closed end of the socket shell 33', the flange 25 contacts the end face 26' before the connecting unit 36' extends into the socket cylindrical sealing plug 11', thereby reaching the final connection state.

[0088] The socket inner core 28' is provided with a socket positioning protrusion 16'.

[0089] A socket annular convex claw 31 ′ is installed at the end of the socket inner core 28 ′, and the socket annular convex claw 31 ′ is slidably assembled with the socket shell 33 ′.

[0090] A thread 32' is provided at the end of the socket inner core 28', and a thread is also provided on the socket annular convex claw 31', and the two are threadedly connected.

[0091] The inner side of the end of the socket housing 33' is provided with a blocking surface 21' for blocking the movement of the socket circular annular convex claw 31' when it expands outward.

[0092] The socket annular convex claw 31 ′ comprises an annular portion and a claw 19 ′ located on the annular portion. The outer side of the claw 19 ′ has an inclined surface 20 ′. When the claw 19 ′ expands outward, the inclined surface 20 ′ contacts the blocking surface 21 ′ to achieve blocking.

[0093] The assembly process of connecting the socket end oil filling device to the connector socket end is as follows: Connect the socket end oil filling device with the connector socket end. First, insert the positioning protrusion 16' of the connector socket end into the alignment guide groove 12 in the socket end oil filling device to ensure that the first cylindrical sealing plug 1 of the socket end oil filling device is strictly aligned with the socket cylindrical sealing plug 11' of the connector socket end.

[0094] The socket end oil filling device and the connector socket end both contain a cylindrical sealing plug, and a part of the sector 17 of the cylindrical sealing plug is exposed on the end face. The first housing 6 of the socket end oil filling device has a concave card slot 18, and the connector socket end includes a socket annular convex claw 31' that matches the size of the concave card slot 18. The socket end oil filling device is axially connected to the connector socket end, and the claw 19' of the socket annular convex claw 31' is radially propped up, and its outer inclined surface 20' contacts with the blocking surface 21' of the connector socket end, resulting in the socket end of the socket end. The core 28' cannot move axially. With the application of axial force, part of the sector 17 in the first cylindrical sealing plug 1 and the socket cylindrical sealing plug 11' is flattened by the cylindrical surface, and a cylindrical seal is formed on the flattened end surface. At this time, the annular convex claw 31' can just be embedded in the concave groove 18, and the claw 19' is reset and no longer radially supported. The outer inclined surface 20' is no longer in contact with the blocking surface 21' of the connector socket end, but slides into the socket shell 33' of the connector socket end, and the socket end oil filling device can continue to move axially.

[0095] As the oil filling device at the socket end is axially inserted, the upper driving member 22' at the socket end of the connector can axially drive the ear handle 23 of the first cylindrical sealing plug 1 in the socket end oil filling device to rotate, and the lower driving member 24' at the socket end of the connector simultaneously drives the ear handle in the socket cylindrical sealing plug 11' to rotate synchronously in the opposite direction until the cylindrical sealing plugs are rotated 90° and the radial through holes in the two docking cylindrical sealing plugs are connected.

[0096] After the radial through hole in the cylindrical sealing plug is penetrated, the first limiting flange 25 on the first housing 6 of the socket end oil filling device contacts the socket housing end face 26' of the connector socket end to limit the axial position and no longer insert.

[0097] A first one-way valve 7 is installed in a first oil filling passage 11 in the oil filling device at the socket end. The first one-way valve 7 is connected to the oil filling pump, and oil is pumped into the connector socket end through the oil filling pump. After the other first oil filling passage 11 in the oil filling device at the socket end overflows with oil, the two docking mechanisms are placed vertically as a whole to remove bubbles in the sealed cavity.

[0098] The two docking mechanisms may also be placed in a negative pressure chamber as a whole, and the bubbles in the sealed cavity 27' at the connector socket end may be exhausted as quickly as possible by extracting negative pressure.

[0099] In some embodiments, after the sealed cavity 27' at the connector socket end is filled with oil and the bubbles are exhausted, another first one-way valve 7 or a plug can be used to seal another first oil filling passage 11, and a certain amount of oil can continue to be pumped into the first one-way valve 7 to form a positive pressure inside it.

[0100] The oil filling device at the socket end is pulled out axially, and the cylindrical sealing plug is axially pulled back by the upper driving member 22' and the lower driving member 24' at the connector socket end. The cylindrical sealing plugs of the two docking mechanisms are respectively rotated 90° in a sealed state, and the radial through holes in the cylindrical sealing plugs are closed, thereby realizing the oil filling and sealing (positive pressure sealing) of the sealing cavity 27' in the connector socket end. At the same time, due to the placement of the connector socket end, it is easier to drain the bubbles in the sealing cavity 27' at the connector socket end. Even when the oil is pumped in again, the oil without bubbles in the oil filling device enters the sealing cavity 27' first, thereby avoiding the existence of bubbles in the sealing cavity 27'.

[0101] This embodiment also proposes an oil filling method for the connector socket end: The socket end oil filling device is connected to the connector socket end, and the two first oil filling passages of the socket end oil filling device are connected to the sealed volume cavity of the connector socket end; A first one-way valve is installed in one first oil filling passage and connected to an oil filling pump to fill oil until the filled oil overflows from another first oil filling passage; Expel the microbubbles in the oil; place the oil filling device and the socket end vertically or in a negative pressure environment to increase the speed of expelling bubbles; The socket end oil filling device and the connector socket end are separated, the sealing cavity of the connector socket end is sealed, and the sealing cavity is filled with oil without bubbles.

[0102] In some embodiments, in order to achieve positive pressure in the sealed cavity, the oil filling method at the connector socket end is: The socket end oil filling device is connected to the connector socket end, and the two first oil filling passages of the socket end oil filling device are connected to the sealed volume cavity of the connector socket end; A first one-way valve is installed in one first oil filling passage and connected to an oil filling pump to fill oil until the filled oil overflows from another first oil filling passage; Expel the microbubbles in the oil; place the oil filling device and the socket end vertically or in a negative pressure environment to increase the speed of expelling bubbles; Install a plug or a first one-way valve on the other first oil filling passage to control the oil filling pump to continue filling oil to the set pressure; The socket end oil filling device and the connector socket end are separated, the sealing cavity of the connector socket end is sealed, and the sealing cavity is filled with positive pressure oil without bubbles.

[0103] like Figure 10-12 As shown, the plug end oil filling device includes a second outer shell 33 , a second inner core 28 , two second oil filling passages 42 , a second cylindrical sealing plug 11 , a driving member and a second one-way valve 44 .

[0104] The second housing 33 is in the shape of a cylinder with one end closed. A guide groove 35 is provided on the second housing 33 , and the guide groove 35 extends along the axial direction of the second housing 33 .

[0105] The second inner core 28 is located in the second outer shell 33 and is slidably connected to the second outer shell 33 . An elastic buffer element 41 is disposed between the second inner core 28 and the second outer shell 33 .

[0106] The second inner core 28 is provided with a limit screw 34 , which is used to assemble with the guide groove 35 to achieve axial relative movement between the second inner core 28 and the second outer shell 33 and limit the range of movement.

[0107] Two second oil-filled passages 42 are located in the second inner core 28 .

[0108] In some embodiments, two second oil-filled passages 42 extend through the second inner core 28 .

[0109] In some embodiments, the two second oil-filled passages 42 are located in the axial direction of the second inner core 28 .

[0110] The two second cylindrical sealing plugs 11 correspond to the two second oil filling passages 42 respectively.

[0111] The second cylindrical sealing plug 11 is rotatably assembled with the second inner core 28 . The second cylindrical sealing plug 11 includes a plurality of second through holes 38 . The second cylindrical sealing plug 11 can be rotated to a state where the second through holes 38 are connected or disconnected with the second oil filling passage 42 .

[0112] The second cylindrical sealing plug 11 is made of an elastomer and has a plurality of radial second through holes 38 formed thereon.

[0113] The second inner core 28 is provided with a second cylindrical hole 40 , and the second cylindrical sealing plug 11 is located in the second cylindrical hole 40 and is press-fitted by the second gland 29 .

[0114] The second cylindrical sealing plug 11 is inserted into the second cylindrical hole 40 in the second inner core 28, and is installed and fixed by the second pressure cover 29 through the second pressure cover fixing screw 30. The second cylindrical sealing plug 11 can rotate 90° around its cylindrical axis. After installation, the second inner core assembly is installed as a whole into the second outer shell 33, and the limit screw 34 is installed in the guide groove 35.

[0115] The driving member is used to drive the second cylindrical sealing plug 11 and the plug cylindrical sealing plug 1' to rotate.

[0116] The second driving member includes an upper driving member 22 and two lower driving members 24. The upper driving member 22 and the lower driving member 24 are both installed in the socket housing 33.

[0117] The second cylindrical sealing plug 11 is provided with a lug handle. The lug handle is provided at the bottom of the second cylindrical sealing plug 11, and the lug handle can be provided to facilitate the lower driving member 24 to drive the second cylindrical sealing plug 11 to rotate.

[0118] The driving member passes through the second inner core 28 and can shuttle in the driving member shuttle hole of the second inner core 28 .

[0119] The second inner core 28 is provided with a second driving member shuttle hole. When the second inner core 28 and the second outer shell 33 move relative to each other, the driving member rotates in the driving member shuttle hole.

[0120] In some embodiments, the second drive member shuttle hole includes a second upper drive member shuttle hole and two second lower drive member shuttle holes that penetrate the second inner core 28. The upper drive member 22 shuttles in the upper drive member shuttle hole, and the lower drive member 24 shuttles in the lower drive member shuttle hole.

[0121] In some embodiments, a lower drive member shuttle hole is also provided on the second pressure cover 29 .

[0122] The outlet end of the second oil filling passage 42 is connected with a second slit 43 , and the arrangement direction of the second slit 43 is the same as the arrangement direction of the plurality of second through holes 38 on the second cylindrical sealing plug 11 . The second slit 43 allows the oil to flow evenly into the second cylindrical sealing plug 11 .

[0123] At least one second one-way valve 44 is installed on the second oil filling passage 42 .

[0124] The second one-way valve 44 can be installed at the inlet end of the second oil filling passage 42 through its own external thread.

[0125] The second inner core 28 is provided with a positioning protrusion 16 .

[0126] A second annular convex claw 31 is installed at the end of the second inner core 28 , and the second annular convex claw 31 is slidably assembled with the second outer shell 33 .

[0127] A thread 32 is provided at the end of the second inner core 28 , and a thread is also provided at the second annular convex claw 31 , and the two are threadedly connected.

[0128] The inner side of the end of the second housing 33 has a blocking surface 21 for blocking the movement of the second annular convex claw 31 when it expands outward. The second annular convex claw 31 includes an annular portion and a claw 19 located on the annular portion. The outer side of the claw 19 has an inclined surface 20. When the claw 19 expands outward, the inclined surface 20 contacts the blocking surface 21 to achieve blocking.

[0129] The plug-end oil filling device comprises a second handle 45 mounted on the second housing 33, and the second handle 45 is used for the operation when the plug-end oil filling device is integrally plugged into or pulled out of the plug end.

[0130] like Fig.14 As shown, the plug-end oil filling device also includes an oil filling pump, which is used to supply oil to the second oil filling passage 42.

[0131] like Figure 12-13 As shown, the plug end includes a plug housing 6', a plug core 4', and a plug cylindrical sealing plug 1'.

[0132] The plug housing 6' is cylindrical, and a concave slot 18' is provided on the outer side of the end of the plug housing 6'.

[0133] The plug inner core 4' is located in the plug outer shell 6' and is fixedly connected to the plug outer shell 6'. Specifically, the plug inner core 4' and the plug outer shell 6' are fixed by an inner core positioning screw 5'.

[0134] The plug inner core 4' is provided with a driving member shuttle hole. When the plug end oil filling device is connected to the plug end, the driving member of the plug end oil filling device shuttles in the driving member shuttle hole.

[0135] In some embodiments, the drive member shuttle hole includes an upper drive member shuttle hole 14' and two lower drive member shuttle holes 13'. The upper drive member 22 of the plug end oil filling device shuttles in the upper drive member shuttle hole 14', and the lower drive member 24 shuttles in the lower drive member shuttle hole 13'.

[0136] The plug inner core 4' has a sealed cavity 46' therein, and the sealed cavity 46' is used to contain oil.

[0137] Two plug cylindrical sealing plugs 1' are mounted on the plug inner core 4' and are used to open or close the sealing cavity 46'.

[0138] The plug cylindrical sealing plug 1' and the plug inner core 4' are rotatably assembled. The plug cylindrical sealing plug 1' includes a plurality of plug through holes 10'. The plug cylindrical sealing plug 1' can be rotated to a state where the plug through holes 10' are connected or disconnected with the sealing cavity 46'.

[0139] The plug cylindrical sealing plug 1' is made of an elastic body and is provided with a plurality of radial plug through holes 10'.

[0140] The plug inner core 4' is provided with a plug cylindrical hole 37', and the plug cylindrical sealing plug 1' is located in the plug cylindrical hole 37' and is press-fitted through the plug pressing cover 2'.

[0141] The plug cylindrical sealing plug 1' is inserted into the plug cylindrical hole 37' in the plug inner core 4' and is fixed by the plug gland 2' through the plug gland fixing screws 3'. The plug cylindrical sealing plug 1' can rotate 90 degrees around its cylindrical axis.

[0142] The plug cylindrical sealing plug 1' is provided with an ear handle 23'. The ear handle 23' is provided on the top of the plug cylindrical sealing plug 1', and the ear handle 23' can facilitate the upper driving member 22 to drive the plug cylindrical sealing plug 1' to rotate.

[0143] In some embodiments, an upper drive member shuttle hole 14' is also provided on the plug gland 2'.

[0144] The connecting unit 36 ​​is mounted on the plug housing 6 ′ and inserted into the sealed cavity 46 ′ of the plug core 4 ′.

[0145] The plug inner core 4' is fixedly connected to the plug outer shell 6', and the connecting unit inside it is also fixed and does not move axially.

[0146] The plug inner core 4' is provided with an alignment guide groove 12'.

[0147] The assembly process of connecting the plug end oil filling device to the connector plug end is as follows: Connect the plug-end oil filling device to the connector plug end. First, insert the positioning protrusion 16 of the plug-end oil filling device into the alignment guide groove 12' of the plug end to ensure that the plug cylindrical sealing plug 1' of the plug-end oil filling device is strictly aligned with the second cylindrical sealing plug 11' of the connector plug end.

[0148] The plug-end oil filling device and the connector plug-end both contain cylindrical sealing plugs, and a part of the sector 17 of the cylindrical sealing plug is exposed on the end face. The plug housing 6' of the plug end has a concave card slot 18', and the plug-end oil filling device includes a second annular convex claw 31 that matches the size of the concave card slot 18'. The plug-end oil filling device is axially connected to the connector plug end, and the claw 19 of the second annular convex claw 31 is radially propped up, and its outer inclined surface 20 contacts the blocking surface 21 of the plug-end oil filling device, resulting in the plug The second inner core 28 of the end oil filling device cannot move axially. With the application of axial force, the second cylindrical sealing plug 11 and part of the sector 17 in the plug cylindrical sealing plug 1' are flattened by the cylindrical surface, and a cylindrical seal is formed on the flattened end surface. At this time, the annular convex claw 31 can just be embedded in the concave groove 18', the claw 19 is reset and no longer radially supported, and its external inclined surface 20 is no longer in contact with the blocking surface 21 and stuck, but slides into the second outer shell 33, and the plug end oil filling device can continue to move axially.

[0149] As the plug-end oil filling device is axially inserted, the upper driving member 22 of the plug-end oil filling device can axially drive the ear handle 23' in the plug cylindrical sealing plug 1' to rotate, and the lower driving member 24 simultaneously drives the ear handle of the second plug cylindrical sealing plug 11 to rotate synchronously in the opposite direction until the cylindrical sealing plugs are both rotated 90° and the radial through holes in the two connecting cylindrical sealing plugs are connected.

[0150] After the radial through hole in the cylindrical sealing plug is penetrated, the axial position is limited by the limit screw 34 and the guide groove 35, and no further insertion is performed.

[0151] A second one-way valve 44 is installed in a second oil filling passage 42 in the plug end oil filling device. The second one-way valve 44 is connected to the oil filling pump, and oil is pumped into the connector plug end through the oil filling pump. After the other second oil filling passage 42 in the plug end oil filling device overflows with oil, the two docking mechanisms are placed vertically as a whole to remove bubbles in the sealed cavity.

[0152] The two docking mechanisms may also be placed as a whole in a negative pressure chamber, and the bubbles in the sealed cavity 46' at the connector plug end may be exhausted as quickly as possible by extracting negative pressure.

[0153] In some embodiments, after the sealing cavity 46' at the connector plug end is filled with oil, another second one-way valve 44 or a plug can be used to seal another second oil filling passage 42, and a certain amount of oil can continue to be pumped into the second one-way valve 44 to form a positive pressure inside it.

[0154] The plug end oil filling device is axially pulled out, and the cylindrical sealing plug is axially pulled back by the upper driving member 22 and the lower driving member 24 of the connector plug end. The cylindrical sealing plugs of the two docking mechanisms are respectively rotated 90° in the sealed state, and the radial through holes in the cylindrical sealing plugs are closed, thereby realizing the oil filling and sealing (positive pressure sealing) of the sealing cavity 46' in the connector plug end. At the same time, due to the placement of the connector plug end, the bubbles in the sealing cavity 46' of the connector plug end are easier to be discharged. Even in the process of pumping oil again, the oil without bubbles in the oil filling device enters the sealing cavity 46' first, avoiding the existence of bubbles in the sealing cavity 46'. This embodiment also proposes a method for filling the connector plug end with oil: The plug-end oil filling device is connected to the connector plug end, and the two second oil filling passages of the plug-end oil filling device are connected to the sealed volume chamber of the connector plug end; A second one-way valve is installed in one second oil filling passage and connected to an oil filling pump to fill oil until the filled oil overflows from another second oil filling passage; Expel the microbubbles in the oil; place the oil filling device and the socket end vertically or in a negative pressure environment to increase the speed of expelling bubbles; The plug end oil filling device and the connector plug end are separated, the sealing cavity of the connector plug end is sealed, and the sealing cavity is filled with oil without bubbles.

[0155] In some embodiments, in order to achieve positive pressure in the sealed cavity, the oil filling method of the connector plug end is: The plug-end oil filling device is connected to the connector plug end, and the two second oil filling passages of the plug-end oil filling device are connected to the sealed volume chamber of the connector plug end; A second one-way valve is installed in one second oil filling passage and connected to an oil filling pump to fill oil until the filled oil overflows from another second oil filling passage; Expel the microbubbles in the oil; place the oil filling device and the plug end vertically or in a negative pressure environment to increase the speed of expelling bubbles; install a plug or a second one-way valve on the other second oil filling passage to control the oil filling pump to continue filling oil to the set pressure; The plug end oil filling device and the connector plug end are separated, the sealing cavity of the connector plug end is sealed, and the sealing cavity is filled with positive pressure oil without bubbles.

[0156] This embodiment utilizes the plug sealing principle to simulate the dynamic sealing mechanism when the connector plug end is paired with the connector socket end. The oil filling and positive pressure addition of the connector plug end and the connector socket end are realized through the oil filling device, and the plug is closed under the positive pressure environment of the sealed cavity.

[0157] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to replace some of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. An underwater connector oil filling device based on cock seal, characterized in that: The oil filling device comprises: The socket end oil filling device is used to fill the connector socket end with oil; the socket end oil filling device comprises: first shell; A first inner core is located in the first outer shell and fixedly connected to the first outer shell, and the first inner core is provided with a drive member shuttle hole; Two first oil-filled passages are located in the first inner core; Two first cylindrical sealing plugs, corresponding to the two first oil filling passages respectively, the first cylindrical sealing plugs and the first inner core are rotatably assembled, the first cylindrical sealing plugs include a plurality of first through holes, and the first cylindrical sealing plugs can be rotated to a state where the first through holes are connected or disconnected with the first oil filling passages; at least one first one-way valve, configured to be installed on the first oil filling passage; The plug end oil filling device is used to fill the plug end of the connector with oil; the plug end oil filling device comprises: Second shell; A second inner core is located in the second outer shell and is slidably connected to the second outer shell, an elastic buffer element is provided between the second inner core and the second outer shell, and a drive member shuttle hole is provided in the second inner core; two second oil-filled passages, located in the second inner core; Two second cylindrical sealing plugs, corresponding to the two second oil filling passages respectively, the second cylindrical sealing plugs and the second inner core are rotatably assembled, the second cylindrical sealing plugs include a plurality of second through holes, and the second cylindrical sealing plugs can be rotated to a state where the second through holes are connected or disconnected with the second oil filling passages; A driving member, used for driving the second cylindrical sealing plug to rotate, penetrating the second inner core and capable of shuttling in the driving member shuttle hole; at least one second one-way valve, installed on the second oil filling passage; An oil filling pump is used to supply oil to the first oil filling passage or the second oil filling passage.

2. The underwater connector oil filling device based on plug seal according to claim 1 is characterized in that: The outlet end of the first oil-filling passage is connected to a first slit, and the first cylindrical sealing plug can be rotated to a state where the first through hole is connected or disconnected from the first slit; the outlet end of the second oil-filling passage is connected to a second slit, and the second cylindrical sealing plug can be rotated to a state where the second through hole is connected or disconnected from the second slit.

3. The underwater connector oil filling device based on plug seal according to claim 1, characterized in that: The first inner core is provided with an alignment guide groove, and the second inner core is provided with a positioning protrusion; or, the second inner core is provided with an alignment guide groove, and the first inner core is provided with a positioning protrusion.

4. The underwater connector oil filling device based on plug seal according to claim 1, characterized in that: A first limiting flange is arranged in the middle of the first shell.

5. The underwater connector oil filling device based on plug seal according to claim 1, characterized in that: The first inner core is provided with a first cylindrical hole, the first cylindrical sealing plug is located in the first cylindrical hole and is pressed into place by a first pressure cover; the second inner core is provided with a second cylindrical hole, the second cylindrical sealing plug is located in the second cylindrical hole and is pressed into place by a second pressure cover.

6. The underwater connector oil filling device based on plug seal according to claim 1, characterized in that: The first cylindrical sealing plug and the second cylindrical sealing plug are both provided with ear handles.

7. The underwater connector oil filling device based on plug seal according to claim 1, characterized in that: A concave groove is arranged on the outer side of the end of the first shell; a circular convex claw is installed on the end of the second inner core, and the circular convex claw is slidably assembled with the second shell, and the inner side of the end of the second shell has a blocking surface for blocking the movement of the circular convex claw when it expands outward.

8. The underwater connector oil filling device based on plug seal according to claim 1, characterized in that: The socket-end oil filling device comprises a first handle mounted on the first shell; the plug-end oil filling device comprises a second handle mounted on the second shell.

9. The oil filling method of the underwater connector oil filling device based on the plug seal according to any one of claims 1 to 8, characterized in that: The oil filling method of the connector socket end is: The socket end oil filling device is connected to the connector socket end, and the two first oil filling passages of the socket end oil filling device are connected to the sealed volume cavity of the connector socket end; A first one-way valve is installed in one first oil filling passage and connected to an oil filling pump to fill oil until the filled oil overflows from another first oil filling passage; Expel micro bubbles from the oil; The socket end oil filling device is separated from the connector socket end, and the sealing cavity of the connector socket end is sealed; The oil filling method of the connector plug end is: The plug-end oil filling device is connected to the connector plug end, and the two second oil filling passages of the plug-end oil filling device are connected to the sealed volume cavity of the connector plug end; A second one-way valve is installed in one second oil filling passage and connected to an oil filling pump to fill oil until the filled oil overflows from another second oil filling passage; Expel micro bubbles from the oil; The plug end oil filling device and the connector plug end are separated, and the sealing cavity of the connector plug end is sealed.

10. The oil filling method of the underwater connector oil filling device for cock sealing according to claim 9, characterized in that: In the oil filling method of the connector socket end, after the microbubbles in the oil are discharged, a plug or a first one-way valve can be installed on another first oil filling passage to control the oil filling pump to continue filling the oil to the set pressure; In the oil filling method of the connector plug end, after the microbubbles in the oil are discharged, a plug or a second one-way valve can be installed on another second oil filling passage to control the oil filling pump to continue filling the oil to the set pressure.

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