An oil-chargeable compact watertight connector

Abstract

This invention provides a compact, watertight, oil-fillable connector, relating to the field of connector technology. It includes a plug, a socket, an oil tube, a retaining sleeve, a Haver ring, and an anti-torsion guide pin. The socket includes a socket housing, a socket sealing component, and an oil-filled screw. The plug includes a plug housing, a plug sealing component, and an vent screw. The two ends of the oil tube are respectively fixedly installed at the tail ends of the socket housing and the plug housing. The socket housing has a guide pin blind hole and an oil-filled screw through hole, and the socket sealing component is sealed inside the socket housing. The plug housing has a guide pin thread blind hole and an vent screw through hole, and the plug sealing component is sealed inside the plug housing. Pins are installed in the socket sealing component and the plug sealing component using a glass sealing process. After the socket and plug are respectively inserted into the mating components, a Haver ring is installed on the outside of the mating position to achieve axial locking. This connector reduces space occupation while ensuring sealing performance.

Description

Technical Field

[0001] This invention relates to the field of connector technology, specifically to an oil-fillable compact watertight connector. Background Technology

[0002] Conventional tensile watertight connectors have the following problems: A schematic diagram of a conventional tensile connector is shown below. Figure 1 As shown

[0003] Question 1: To achieve oil filling functionality, conventional watertight connectors often require an oil-filling structure on the side of the connector, necessitating a sealing structure and an oil-filling screw. This approach has the following disadvantages: ① The dimensions of this part cannot coincide with the space of the bracket or other components in the axial direction, causing the oil-filling structure to significantly occupy the connector's axial space; ② Due to the limited radial shell wall thickness in the area where the oil-filling screw is located, only one sealing ring can be installed between the oil-filling screw and the sleeve, resulting in insufficient design margin. If this sealing ring fails, the solvent inside the connector will leak out from here, affecting product performance.

[0004] Question 2: To achieve longitudinal sealing, the pins and housing are sealed using a special glass sealing process. However, to enable wire soldering, the connector sleeve and sealing component need to be changed to a two-piece structure. In this case, a sealing structure needs to be designed at the mating point of the sleeve and sealing component to ensure that seawater does not enter the connector tail through the gap between them. The disadvantages of this are: ① Increasing the sealing area requires reducing the radial dimension of the connector; ② The two sealing grooves reduce the axial dimension of the connector; ③ Each additional sealing point in the seawater contact area increases the risk of leakage.

[0005] Question 3: Conventional watertight connectors use a five-key slot structure at the mating interface to ensure effective blind alignment of the pin holes during head-and-base mating. This five-key slot guides the effective mating between the head and base housings. However, this design has the following drawbacks: ① The five-key slot structure is located at the very front of the mating surface. To ensure effective guidance and to guarantee that the five-key slot contacts the pins before the socket and prevents digging between the pins and the plug housing, sufficient axial length is required, increasing the overall connector length. ② The increased length of the five-key slot necessitates lengthening the internal sockets and the insulating components that fix them. Furthermore, it makes it more difficult to remove moisture from the mating interface.

[0006] Question 4: In conventional watertight connectors, the tethering bracket and the connector sleeve are two separate structures. This presents the following disadvantages: ① To install the tethering bracket, it must first be completely passed through the boss at the tail of the sleeve before it can be inserted into the connector sleeve. This requires sufficient safety margin between the connector tail solder cup and the bracket to ensure the solder cup is not affected during bracket installation; ② To facilitate fixing the tethering bracket to the sleeve, blind holes are designed on both sides of the T-shaped tethering bracket, and threaded through holes are designed on both sides of the sleeve tail. A portion of the long screw is screwed into the threaded through holes, and a portion extends into the blind holes of the tethering bracket. To avoid stress on the screw, a gap exists between the screw and the bracket. During operation, the bracket moves or rubs against the screw and the sleeve boss, generating metallic friction noise.

[0007] In addition, the weight of the connector increases with each increase in connector length, which is very unfavorable for some applications where weight is a major concern. Summary of the Invention

[0008] To address the aforementioned technical problems, this invention provides an oil-fillable, compact, watertight connector that reduces space requirements while ensuring sealing performance.

[0009] To achieve the above technical objectives, the adopted technical solution is: an oil-fillable compact watertight connector, including a plug, a socket, an oil pipe, a retaining sleeve, a Haver ring, and an anti-torsion guide pin;

[0010] The socket includes a socket housing, a socket sealing component, and an oil-filling screw; the plug includes a plug housing, a plug sealing component, and an air vent screw; the two ends of the oil pipe are respectively installed at the tail ends of the socket housing and the plug housing via fixing sleeves.

[0011] The socket housing has an axially formed blind hole for inserting an anti-torsion guide pin on its end face, and an oil-filled screw through hole for communicating with the socket housing cavity. A removable oil-filled screw is installed in the oil-filled screw through hole, and a socket sealing component is sealed inside the socket housing cavity.

[0012] The end face of the plug housing is provided with a guide pin thread blind hole for installing an anti-torsion guide pin, and a vent screw through hole for communicating with the plug housing cavity. A detachable vent screw is installed in the vent screw through hole, and a plug sealing component is sealed and installed in the plug housing cavity.

[0013] The socket sealing component and plug sealing component are equipped with pins using glass sealing technology. The socket housing is laterally sealed after mating with the matching plug housing through a smooth sealing surface and sealing element.

[0014] After the socket and plug are respectively inserted into the mating parts, a Haval ring is installed on the outside of the mating position to achieve axial locking.

[0015] The beneficial effects of this invention are as follows: Longitudinal sealing is achieved through the glass sealing process between the socket housing and the socket sealing component, the plug housing and the plug sealing component, and the sealing component itself; transverse sealing is achieved through the smooth sealing surface of the socket housing and the mating of the sealing element with the plug housing; the anti-torsion guide pin and the guide pin guide blind hole in the socket housing cooperate with each other, and this structure is located above the mating surface, avoiding the axial dimension occupation of the connector by the conventional five-key slot structure. By placing the oil-filled screw structure and the venting structure externally to one corner of the housing, the axial space occupied by the sealing structure and the oil-filled screw is saved, thus avoiding the occupation of the connector contact arrangement area or the axial length of the connector side, effectively improving the multi-core arrangement of the connector. By separating the socket sealing component and the plug sealing component from the socket housing and the plug housing, the connector can be electrically assembled outside the plug and socket. This eliminates the need to add a sleeve structure to break the connector from the solder cup position for convenient electrical assembly, and also reduces one leakage channel. The axial length of a conventional tensile connector head and base after mating, excluding the tethering bracket, is about 164mm. The axial dimension of the connector based on the above new solution is 82mm, while taking into account the axial tensile strength of over ton, multi-core contact arrangement, and other electrical and mechanical properties of conventional tensile connectors.

[0016] The front end of the exhaust screw through hole and the oil filling screw through hole described in this invention is a smooth sealing surface, the tail end is a threaded hole, and the root is a through hole.

[0017] The beneficial effects of this invention are: the smooth sealing surface is used to cooperate with the screw to achieve a seal, the threaded hole is used to cooperate with the screw for fixing, and the through hole facilitates air venting or oil intake.

[0018] The oil-filled screw and the vent screw of the present invention have multiple sealing grooves at their front ends, and a sealing ring is installed in the sealing grooves. Their tail ends have a threaded structure.

[0019] The beneficial effects of this invention are: by sealing the groove and the sealing ring therein, it is ensured that the connector tail will not flow out from the mating surface and seawater will not enter the connector tail from there.

[0020] The socket housing of the present invention has a socket retaining spring groove on the cavity wall, and the retaining spring A limits the socket sealing component in the socket housing.

[0021] The beneficial effect of this invention is that the socket sealing component is limited by the socket retaining spring groove and retaining spring A, thereby enhancing the stability of the socket sealing component installation.

[0022] The socket retainer groove of the present invention has a recessed structure for removing the retainer A from the socket retainer groove.

[0023] The beneficial effect of this invention is that the recessed structure facilitates the installation and removal of the retaining ring A.

[0024] The socket housing of the present invention has a socket sealing component positioning groove on its cavity, and the socket sealing component has a socket positioning key for cooperating with the socket sealing component positioning groove.

[0025] The beneficial effects of this invention are: the socket positioning key and the socket sealing component positioning groove cooperate to ensure the positional accuracy between each pin in the socket sealing component and the housing.

[0026] The outer surfaces of the socket housing and plug housing described in this invention are square structures, and the outer surfaces of the socket housing and plug housing are provided with square grooves that cooperate with the Haver ring.

[0027] The beneficial effects of this invention are: the surfaces of the plug housing and the socket housing are designed with square grooves and square platform structures, and the Haver ring is designed with matching square platform cavity and square groove. The two structures correspond to each other, realizing the axial tensile strength of the connector.

[0028] The front end of the socket sealing component of the present invention is provided with a T-shaped groove for hooking out the tool.

[0029] The beneficial effect of this invention is that, in the actual use of the connector, it is sometimes necessary to remove the socket sealing component from the inside of the socket housing. At this time, a hook tool can be used to hook the T-slot and pull the socket sealing component out.

[0030] The plug housing of the present invention has a plug retaining spring groove on the cavity wall, and the plug sealing component is limited in the plug housing by the retaining spring B.

[0031] The beneficial effect of this invention is that the plug sealing component is limited by the plug retaining spring groove and retaining spring B, thereby enhancing the stability of the plug sealing component installation.

[0032] The plug housing of the present invention has a plug sealing component positioning groove on its cavity, and the plug sealing component has a plug positioning key for cooperating with the plug sealing component positioning groove.

[0033] The beneficial effects of this invention are: the plug positioning key and the plug sealing component positioning groove cooperate to ensure the positional accuracy between each pin in the plug sealing component and the housing.

[0034] The blind hole of the guide pin described in this invention has a rounded chamfer at the head, a through hole in the middle, and a thread at the tail.

[0035] The beneficial effects of this invention are: the thread is used to fix the anti-torsion guide pin, and the tooling can be inserted into the through hole to tighten the anti-torsion guide pin.

[0036] The socket housing and plug housing of the present invention are integrally connected to a rope-threading bracket at their tail ends.

[0037] The beneficial effects of this invention are: the rope threading bracket is integrated with the outer shell, saving the safety margin between the rope threading bracket and the contact parts, as well as the axial space occupied by the boss on the sleeve in the prior art. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the existing technology structure;

[0039] Figure 2 This is a cross-sectional schematic diagram of the present invention;

[0040] Figure 3 This is a three-dimensional schematic diagram of the present invention;

[0041] Figure 4 This is a schematic diagram of the present invention after the oil pipe has been removed;

[0042] Figure 5 This is a schematic diagram of the structure after interpolation according to the present invention;

[0043] Figure 6 This is a sectional view of the socket;

[0044] Figure 7 This is a schematic diagram of the socket housing structure;

[0045] Figure 8 This is a sectional view of the socket housing structure;

[0046] Figure 9 This is a schematic diagram of an oil-filled screw structure;

[0047] Figure 10 This is a schematic diagram of the socket sealing component structure;

[0048] Figure 11 This is a cross-sectional view of the socket sealing component.

[0049] Figure 12 This is a cross-sectional view of the plug;

[0050] Figure 13 This is a schematic diagram of the plug housing structure;

[0051] Figure 14 This is a cross-sectional view of the plug housing structure;

[0052] Figure 15 This is a schematic diagram of the anti-torsion guide pin structure;

[0053] Figure 16 This is a schematic diagram of the exhaust screw structure;

[0054] Figure 17 This is a schematic diagram of the plug sealing component structure;

[0055] Figure 18 This is a cross-sectional view of the plug sealing component;

[0056] Figure 19 A schematic diagram of the breakdown of the Haver ring;

[0057] Figure 20 A schematic diagram illustrating the process of attaching the Haval ring to the outside of the plug and socket;

[0058] Figure 21 This is a cross-sectional view of a plug and socket being inserted together.

[0059] In the diagram: 1. Socket housing, 2. O-ring A, 3. Socket sealing component, 4. Haver ring, 5. Washer, 6. Snap ring A, 7. Snap ring B, 8. Anti-torsion guide pin, 9. O-ring B, 10. O-ring C, 11. Plug sealing component, 12. Plug housing, 13. Vent screw, 14. O-ring D, 15. Oil-filled screw, 16. O-ring E, 17. Fixing sleeve, 18. Oil pipe, 19. Pin, 20. Sealing groove, 21. Rope support, 22. Square groove, 23. Square structure, 24. Sleeve, 101. Guide pin blind hole, 102. Oil-filled screw through hole, 103. Socket snap ring groove, 103-1. Recessed structure, 104. Socket sealing component positioning groove, 10 5. Smooth sealing surface a, 106. Smooth sealing surface b, 301. Socket positioning key, 302. T-slot, 303. Sealing ring groove, 304. First glass disc, 305. Sealing socket housing, 401. Square boss, 402. Through hole, 403. Threaded through hole, 404. Groove, 1101. Plug positioning key, 1102. Smooth sealing surface c, 1103. Sealing plug housing, 1104. Adapter insulator component, 1105. Second glass disc, 1106. Boss, 1201. Guide pin threaded blind hole, 1202. Vent screw through hole, 1203. Plug snap ring groove, 1204. Plug sealing component positioning groove, 1205. Sealing groove a, 1206. Sealing groove b. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0061] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0062] The structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0063] like Figure 2 , Figure 3 , Figure 4 , Figure 21 As shown, a compact, oil-fillable watertight connector includes a plug, a socket, an oil pipe 18, a retaining sleeve 17, a Haver ring 4, and an anti-torsion guide pin 8. Through the anti-torsion guide pin 8 and the mating groove structure on the housing, axial anti-rotation without a key eliminates the axial space occupied by the key, while ensuring high radial strength anti-torsion. Multiple watertight connectors of this invention can be connected end-to-end, with the first end being the mating end and the last end being the end connected to the oil pipe. Multiple segments of the watertight connector can be connected in arrays, with the plug of one watertight connector used to mate with the socket of another watertight connector of the same structure.

[0064] like Figure 6 , Figure 12 As shown, the socket includes a socket housing 1, a socket sealing component 3, and an oil filling screw 15. The plug includes a plug housing 12, a plug sealing component 11, and an air vent screw 13. The two ends of the oil pipe 18 are respectively installed at the tail ends of the socket housing 1 and the plug housing 12 through the fixing sleeve 17. The oil filling screw 15 and the air vent screw 13 can be removed. After the oil is filled, the oil filling screw 15 and the air vent screw 13 can be reinstalled.

[0065] like Figure 5As shown, the end face of the socket housing 1 has an axially formed guide pin guide blind hole 101 for inserting the anti-torsion guide pin 8, and an oil-filled screw through hole 102 for communicating with the socket housing 1 cavity. A removable oil-filled screw 15 is installed in the oil-filled screw through hole 102. A socket sealing component 3 is sealed and installed inside the socket housing 1 cavity. The sealing installation can be in the form of a sealing surface, groove, or mating O-ring. The end face of the plug housing 12 has an axially formed guide pin thread blind hole 1201 for installing the anti-torsion guide pin 8, and a threaded blind hole 1201 for communicating with the plug. The head housing 12 has a vent screw through hole 1202 that is connected to the insertion cavity. A removable vent screw 13 is installed in the vent screw through hole 1202. A plug sealing component 11 is sealed and installed in the insertion cavity of the plug housing 12. The socket sealing component 3 and the plug sealing component 11 are fitted with pins 19 using a glass sealing process. The socket housing 1 is laterally sealed after being inserted into the matching plug housing 12 through a smooth sealing surface and a sealing element. After the socket and plug are respectively inserted into the mating components, a Haver ring 4 is installed on the outside of the mating position to achieve axial locking.

[0066] (1) Disassembly of the socket housing structure

[0067] The socket housing 1 has the following structures: oil-filled screw through hole 102, socket retaining spring groove 103, smooth sealing surface a105, smooth sealing surface b106, guide pin guide blind hole 101, sealing component positioning groove 104, rope bracket 21, square groove 22, square structure 23, etc.

[0068] like Figure 8 As shown, the oil-filled screw through hole 102 has the following structure: a smooth sealing surface at the front end, a threaded hole at the rear end, and a through hole at the root. Figure 9 As shown, the front end of the oil-filled screw 15 has multiple sealing grooves 20, and a sealing ring is installed in the sealing groove 20. Its tail end has a threaded structure. The smooth sealing surface at the front end of the oil-filled screw through hole 102 matches the sealing groove 20 and O-ring E16 in the oil-filled screw 15, ensuring that the solvent at the tail of the connector will not leak from the mating surface and that seawater will not enter the tail of the connector from this point. The threaded hole at the tail of the oil-filled screw through hole 102 matches the threaded structure at the tail of the oil-filled screw 15, and the oil-filled screw 15 can be screwed into the thread at the tail of the oil-filled screw through hole 102 through the screw head screw groove. The root of the oil-filled screw through hole 102 is a through hole, which ensures that the solvent can smoothly enter the tail of the socket during the oil filling process.

[0069] The socket retaining ring groove 103 is a ring groove structure. By engaging with the elastic retaining ring A6, it confines the washer 5 and the socket sealing component 3 within part 1. For example... Figure 8 As shown, the socket housing 1 has a socket retaining spring groove 103 on the cavity wall, and the socket sealing component 3 is limited in the socket housing 1 by the retaining spring A6.

[0070] Snap ring groove: Located on both sides of the snap ring groove ring groove, it is a recessed structure 103-1, which facilitates the removal of the snap ring A6 from the snap ring groove 103 of the socket through the recessed structure 103-1. For example... Figure 8 As shown, the socket retainer groove 103 is provided with a recessed structure 103-1 for removing the retainer A6 from the socket retainer groove 103.

[0071] Guide pin guide blind hole 101: Utilizing the "five-slot function" of the conventional watertight connector's "five-key, five-slot" guide design, it guides the connector during mating by cooperating with the anti-torsion guide pin 8. There are three guide pin guide blind holes 101 on the socket housing 1, corresponding to three anti-torsion guide pins 8. The connector can only mate normally when all three guide pin guide blind holes 101 correspond to the anti-torsion guide pins 8. Furthermore, the three-guide structure, compared to a single-guide structure, can triple the radial torsional resistance of the connector.

[0072] Smooth sealing surface a105: Located at the front end of the socket housing 1, through two "sealing grooves a1205" in the plug housing (see... Figure 12 , Figure 14 The O-ring B9 is used to achieve a lateral seal after the connector head and seat are inserted.

[0073] Smooth sealing surface b106: Located in the middle of part 1, it cooperates with the two sealing ring grooves 303 and O-ring A in the socket sealing component 3 to ensure the seal between the contact surface of the socket sealing component 3 and the socket housing 1.

[0074] Socket sealing component positioning groove 104: This corresponds to the "socket positioning key 301" in the socket sealing component 3. Figure 11 This ensures the proper alignment of each pin 19 in the socket sealing component with the socket housing 1. For example... Figure 8 , Figure 10 , Figure 11 As shown, the socket housing 1 has a socket sealing component positioning groove 104 on its cavity, and the socket sealing component 3 has a socket positioning key 301 for cooperating with the socket sealing component positioning groove 104.

[0075] Rope support 21: such as Figure 2 , Figure 5 As shown, the cord threading bracket 21 is integrated with the socket housing 1, changing the independent external bracket to a bracket that is directly designed onto the socket housing 1. This reduces the space occupied by the independent cord threading bracket inside the socket housing while ensuring tensile strength.

[0076] Square structure 23, square groove 22: such as Figure 7 , Figure 8 , Figure 20As shown, the outer surface of the socket housing 1 has a square structure 23, and a square groove 22 that mates with the Haver ring 4 is provided on the outer surface of the socket housing 1. The square structure, the square groove 22, and the Haver ring 4 work together to achieve axial tensile strength and locking of the socket connector.

[0077] (2) Disassembly of the socket sealing component structure

[0078] The socket sealing component 3 includes parts or features such as a pin 19, a first glass disc 304, a T-slot 302, a sealing ring groove 303, and a socket positioning key 301. A cross-sectional view of the socket sealing component 3 is shown below. Figure 11 As shown.

[0079] The features or parts of socket sealing component 3 are described below:

[0080] Pin 19, first glass disc 304, sealing socket housing 305: The pin 19, first glass disc 304 and sealing socket housing 305 are bonded together by a special glass sealing process, thereby achieving a seal between the pin 19 and the sealing socket housing 305.

[0081] Sealing groove 303: The outer side of the socket sealing component 3 has two sealing grooves 303, which, through the O-ring A2 and the "smooth sealing surface b106" in the socket housing 1, achieve a seal between the socket housing 1 and the socket sealing component 3. This prevents the pin 19 from being unsolderable when directly glass-sealed with the socket housing 1.

[0082] Combining the above two points, the socket sealing component 3 achieves internal sealing, and the socket sealing component 3 achieves sealing with the socket housing 1. There are no other leakage channels on the socket mating surface, and the socket mating surface achieves longitudinal sealing.

[0083] Socket positioning key 301: The socket sealing component 3 relies on the raised key to cooperate with the "socket sealing component positioning groove 104" in the socket housing 1 to achieve radial anti-rotation and positioning between the socket sealing component 3 and the socket housing 1.

[0084] T-slot 302: such as Figure 10 , Figure 11 As shown, the front end of the socket sealing component 3 is provided with a T-shaped groove 302 for the hooking tool to hook onto. In actual use of the connector, it is sometimes necessary to remove the socket sealing component 3 from the inside of the socket housing 1. At this time, the socket sealing component 3 can be pulled out by hooking the T-shaped groove 302 with an L-shaped hook (hooking tool).

[0085] (3) Disassembly of the plug housing structure

[0086] The plug housing 12 features a vent screw through hole 1202, a cord support 21, a sealing groove a 1205, a sealing groove b 1206, a plug sealing component positioning groove 1204, a plug retaining ring groove 1203, a guide pin thread blind hole 1201, a square groove 22, and a square structure 23, as shown in the outline drawing. Figure 13 As shown.

[0087] Plug sealing component positioning groove 1204: such as Figure 14 As shown, the plug housing 12 has a plug sealing component positioning groove 1204 on its insertion cavity, and the plug sealing component 11 has a plug positioning key 1101 for cooperating with the plug sealing component positioning groove 1204. The plug sealing component positioning groove 1204 is a groove on the insertion end face of the plug housing, which cooperates with the "plug positioning key 1101" in the plug sealing component 11 to restrict the radial rotation of the plug sealing component 11. This structure plays a positioning role during the insertion process of the plug and socket, ensuring that the insertion hole in the plug sealing component 11 is effectively aligned with the pin in the socket sealing component 3. During the process of inserting the plug sealing component 11, this structure also functions as a "spring removal groove", through which the spring can be quickly removed from the plug spring groove 1203, saving axial space. Alternatively, a spring removal groove can be provided separately, and the plug sealing component positioning groove 1204 can be placed in other positions.

[0088] Plug retainer slot 1203: such as Figure 14 As shown, the plug housing 12 has a plug retaining spring groove 1203 on the cavity wall, and the plug sealing component 11 is limited in the plug housing 12 by the retaining spring B7. This structure can partially coincide with the "plug sealing part positioning groove 1204". This structure cooperates with the retaining spring B7 to axially restrict the plug sealing component 11 inside the plug housing 12.

[0089] Square groove 22, square structure 23: such as Figure 13 , Figure 14 , Figure 20 As shown, the outer surface of the plug housing 12 has a square structure, and a square groove 22 is provided on the outer surface of the plug housing 12 to cooperate with the Haver ring 4. The outer surface structure of the plug cooperates with the Haver ring 4 to achieve axial tensile resistance and locking of the plug.

[0090] Guide pin thread blind hole 1201: Three anti-torsion guide pins 8 can be fixed to the plug housing 12 through the guide pin thread blind hole 1201. There are three such structures on the plug housing 12, corresponding to the three "guide pin guide blind holes 101" in the socket housing 1. The anti-torsion guide pin 8 is a long rod structure with a rounded chamfer at the head, a through hole in the middle, and a thread at the tail. The anti-torsion guide pin 8 can be fixed in the "guide pin thread blind hole 1201" of the plug housing 12 through the tail thread. Since the entire anti-torsion guide pin 8 is relatively smooth, during the process of tightening the anti-torsion guide pin 8, the tool can be passed through the "through hole" in the middle of the anti-torsion guide pin 8 to tighten the anti-torsion guide pin 8. The rounded corner of the anti-torsion guide pin head facilitates the alignment of the anti-torsion guide pin 8 with the "guide pin guide blind hole 101" in the socket housing 1 when the head and seat are mated. By designing three anti-torsion guide pins 8 compared to a single guide structure, the radial torsional resistance of the connector can be enhanced three times. See the schematic diagram of the anti-torsion guide pin 8. Figure 15 .

[0091] Exhaust screw through hole 1202: as shown Figure 14 As shown, the structure has a smooth sealing surface at the front end, a threaded hole at the rear end, and a through hole at the root. Due to the limited space at this location, and because this area is mainly for facilitating the removal of gas from inside the oil pipe during the oil filling process, its dimensions are smaller in diameter and length compared to the "oil filling screw through hole" in part 1. Therefore, the number of sealing ring grooves on the matching vent screw 13 is reduced to two. Figure 16 As shown, the front end of the vent screw 13 has multiple sealing grooves 20, and a sealing ring is installed in the sealing groove 20. Its tail end has a threaded structure. The smooth sealing surface at the front end of the vent screw through hole 1202 cooperates with the sealing groove 20 and O-ring D14 in the vent screw 13 to ensure that the solvent at the tail of the connector will not flow out from the mating surface and that seawater will not enter the tail of the connector from this point. The threaded hole at the tail of the vent screw through hole 1202 matches the threaded structure at the tail of the vent screw 13, and the vent screw 13 can be screwed into the tail thread of the plug housing 12 by screwing the groove at the head of the vent screw 13. The root of the vent screw through hole 1202 is a through hole, which can ensure that gas can be smoothly discharged from the connector from here.

[0092] Sealing groove a1205: By cooperating with the "smooth sealing surface a105" and O-ring B9 in the socket body 1, it achieves lateral sealing after the connector head and socket are inserted. There are two sealing grooves a1205. The first one plays the main sealing role, and the second one plays the backup sealing role.

[0093] Sealing groove b1206: via the "smooth sealing surface c1102" in the plug sealing component 11 (see...) Figure 18 The O-ring C10 is used to ensure a seal between the contact surfaces of the plug sealing component 11 and the plug housing 12.

[0094] The cord threading bracket 21 on the plug has the same structure and function as the cord threading bracket 21 on the socket. The cord threading brackets on the plug and socket are connected by a cord to achieve a certain tensile strength.

[0095] (4) Disassembly of the plug sealing component

[0096] The plug sealing component 11 includes parts or features such as a boss 1106, a retaining ring B7, a transition insulator component 1104, a sealing plug housing 1103, a plug positioning key 1101, a second glass disc 1105, a pin 19, and a smooth sealing surface c1102. A cross-sectional view of the plug sealing component 11 is shown below. Figure 17 As shown.

[0097] Boss 1106: This structure is used to fit with the plug housing 12 to limit the position of the plug sealing component 11.

[0098] Plug positioning key 1101: This structure corresponds to the "plug sealing component positioning groove 1204" in the plug housing 12. The single key ensures the contact position accuracy of the plug sealing component 11.

[0099] The second glass disc 1105, pin 19, and sealing plug housing 1103 are solidified into one piece through a special glass sealing process to achieve longitudinal sealing between the pin and the sealing plug housing.

[0100] Adapter Insulator Component 1104: Since the special glass sealing process can only seal and solidify the pin 19 and the second glass disc 1105, in order to ensure the effective transmission of signals between the plug and the socket, an adapter insulator component 1104 is designed in the plug sealing component 11. Through the double-ended socket in the middle of this component, the plug connector pins that are sealed and solidified as one piece with the glass can be connected to the pins in the socket connector.

[0101] Smooth sealing surface c1102: It cooperates with the "sealing groove b1206" and O-ring C10 in the plug housing 12 to achieve a seal between the contact surfaces of the plug sealing component 11 and the plug housing 12.

[0102] Combining the above two points, the plug sealing component 11 achieves internal sealing, the plug sealing component 11 and the plug housing 12 achieve sealing, and there are no other leakage channels on the plug mating surface. At this time, the plug mating surface achieves longitudinal sealing.

[0103] (5) Disassembly of the Haver ring structure

[0104] The Haval Ring 4 can be designed as an irregular Haval structure, featuring a square boss 401, a groove 404, a through hole 402, and a threaded through hole 403. (See diagram of Haval Ring 4 structure.) Figure 19 As shown.

[0105] In the irregularly shaped Haval structure, the square boss 401 and groove 404 are adapted to the square groove 22 and square structure 23 of the plug and socket housing. After the plug and socket are inserted, the two square bosses 401 of the irregularly shaped Haval are radially engaged into the square groove 22 of the connector housing, axially locking the plug and socket. The process of the square structure 23 engaging into the groove 404 is illustrated in the diagram. Figure 20 As shown.

[0106] Furthermore, the two through holes 402 and two threaded through holes 403 in the irregularly shaped Haval are diagonally distributed, ensuring that no matter how the two Haval halves are interlocked, one through hole 402 corresponds to the other threaded through hole 403. In addition, the end face of the threaded through hole 403 is D-shaped, and the screw head diameter is larger than the diameter of the D-shape, so the screw can only be inserted through the non-threaded through hole side, thus preventing screw misinstallation.

[0107] In summary, the above structure achieves the following functions or advantages:

[0108] (1) Longitudinal sealing of socket: Longitudinal sealing of socket is achieved by the sealing groove and sealing surface between the socket housing 1 and the socket sealing component 3, as well as the special glass sealing process inside the socket sealing component 3.

[0109] (2) Longitudinal sealing of plug: achieved by the sealing groove and sealing surface between plug sealing component 11 and plug housing 12 and the special glass sealing process inside plug sealing component 11.

[0110] (3) Horizontal sealing of plug and socket: achieved by the sealing groove and sealing surface between the plug housing and the socket housing.

[0111] (4) Miniaturization: ① The anti-torsion guide pin 8 cooperates with the "guide pin guide blind hole 101" in the socket housing 1. This structure is located above the sealing groove of the head seat mating surface, avoiding the axial dimension occupation of the connector by the conventional five-key slot structure. ② The tethering bracket 21 is integrated with the sleeve, saving the safety margin between the tethering bracket and the pin, as well as the axial space occupied by the boss on the sleeve; ③ By optimizing the oil-filled screw structure and the venting screw structure, and placing these two screws externally to one corner of the square housing, the axial space occupied by the sealing structure and screws is saved.

[0112] (5) By separating the socket sealing component 3 and the plug sealing component 11 from the socket housing and the plug housing, the connector can be electrically installed outside the plug and socket housing. At this time, it is not necessary to add a sleeve structure to break the connector from the solder cup position for the convenience of electrical installation, and at the same time, a leakage channel is reduced.

[0113] The above are merely preferred embodiments of the present invention and are not intended to limit or restrict the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection declared by the present invention.

Claims

1. A compact, watertight connector that can be filled with oil, comprising a plug, a socket, an oil pipe (18), a retaining sleeve (17), a Haver ring (4), and an anti-torsion guide pin (8); characterized in that: The socket includes a socket housing (1), a socket sealing component (3), and an oil filling screw (15). The plug includes a plug housing (12), a plug sealing component (11), and an air vent screw (13). The two ends of the oil pipe (18) are respectively installed at the tail ends of the socket housing (1) and the plug housing (12) through fixing sleeves (17). The socket housing (1) has an axially formed guide pin guide blind hole (101) for inserting anti-torsion guide pin (8) and an oil-filled screw through hole (102) for communicating with the socket housing (1) cavity. An oil-filled screw (15) that can be removed is installed in the oil-filled screw through hole (102). A socket sealing component (3) is sealed in the socket housing (1) cavity. The end face of the plug housing (12) is provided with a guide pin thread blind hole (1201) for installing the anti-torsion guide pin (8) and a vent screw through hole (1202) for communicating with the plug housing (12) cavity. A detachable vent screw (13) is installed in the vent screw through hole (1202). A plug sealing component (11) is sealed in the plug housing (12). The socket sealing component (3) and the plug sealing component (11) are fitted with pins (19) using glass sealing technology. The socket housing (1) is connected to the matching plug housing (12) through a smooth sealing surface and sealing element to achieve a lateral seal after insertion. After the socket and plug are respectively inserted into the mating parts, a Haver ring (4) is installed on the outside of the mating position to achieve axial locking.

2. The oil-fillable compact watertight connector as described in claim 1, characterized in that: The front end of the exhaust screw through hole (1202) and the oil filling screw through hole (102) is a smooth sealing surface, the tail end is a threaded hole, and the root is a through hole.

3. The oil-fillable compact watertight connector as described in claim 1, characterized in that: The front end of the oil-filled screw (15) and the vent screw (13) is provided with multiple sealing grooves (20), and a sealing ring is installed in the sealing groove (20). The tail end is a threaded structure.

4. The oil-fillable compact watertight connector as described in claim 1, characterized in that: The socket housing (1) has a socket retaining spring groove (103) on its cavity wall, and the socket sealing component (3) is limited in the socket housing (1) by the retaining spring A (6).

5. The oil-fillable compact watertight connector as described in claim 4, characterized in that: The socket retainer groove (103) is provided with a recessed structure (103-1) for removing the retainer A (6) from the socket retainer groove (103).

6. The oil-fillable compact watertight connector as described in claim 1, characterized in that: The socket housing (1) has a socket sealing component positioning groove (104) on its cavity, and the socket sealing component (3) has a socket positioning key (301) for cooperating with the socket sealing component positioning groove (104).

7. The oil-fillable compact watertight connector as described in claim 1, characterized in that: The outer surfaces of the socket housing (1) and plug housing (12) are square structures (23), and the outer surfaces of the socket housing (1) and plug housing (12) are provided with square grooves (22) that cooperate with the Haver ring (4).

8. The oil-fillable compact watertight connector as described in claim 1, characterized in that: The front end of the socket sealing component (3) is provided with a T-shaped groove (302) for hooking out the tool.

9. The oil-fillable compact watertight connector as described in claim 1, characterized in that: The plug housing (12) has a plug retainer groove (1203) on the cavity wall, and the plug sealing component (11) is limited in the plug housing (12) by the retainer B (7).

10. The oil-fillable compact watertight connector as described in claim 1, characterized in that: The plug housing (12) has a plug sealing component positioning groove (1204) on its cavity, and the plug sealing component (11) has a plug positioning key (1101) for cooperating with the plug sealing component positioning groove (1204).

11. The oil-fillable compact watertight connector as described in claim 1, characterized in that: The guide pin thread blind hole (1201) has a rounded chamfer at the head, a through hole in the middle, and a thread at the tail.

12. The oil-fillable compact watertight connector as described in claim 1, characterized in that: The socket housing (1) and plug housing (12) are integrally connected to a lanyard bracket (21) at their tail ends.

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