Multi-core high voltage hermetic connector

Abstract

The application discloses a multi-core high-voltage airtight connector, comprising a connecting plug and a connecting socket, the connecting plug is provided with a plug shell, the connecting socket is provided with a socket shell, the plug shell is inserted into the socket shell at the end, and is locked and fixed through a locking nut at the interface. Through the cooperation design of the plug and the socket, the copper jack is installed in the insulating column, the creepage distance of the copper jack and other electric channels or metal parts is increased, after the cooperation of the plug and the socket, the insulating column is inserted into the inside of the plug insulating plate, the copper pin and the copper jack are inserted in the inside of the insulating column, and the creepage distance between each electric channel is further increased due to the insertion of the insulating column into the plug insulating plate. The problems of low voltage resistance index of the existing multi-core airtight connector are solved, the high-voltage insulation design and the airtight structure design of the electric channel in the electric connector are increased, and the electric channel can meet the voltage resistance index of voltage resistance strength greater than or equal to 30kVDC under the condition that the air leakage rate is less than or equal to 1*10 ‑9 m 3 / s.

Description

Technical Field

[0001] This invention relates to the field of connector technology, and in particular to a multi-core high-voltage hermetic connector. Background Technology

[0002] Multi-core high-voltage sealed connectors are generally used in vacuum experimental tank equipment. The connectors need to be installed on the external flange of the tank to ensure its airtight performance (leakage rate ≤1×10). -9 m 3 Under the premise of ( / s), the connection of high-voltage circuits inside and outside the cabin must also be completed. At present, the nominal withstand voltage of multi-core electrical connectors with airtight function does not exceed 5kVDC. For example, the withstand voltage of the GYBT-JA type single-core high-voltage sealed electrical connector is only 4.5kVDC, which is far from the 30kVDC withstand voltage required by the equipment.

[0003] like Figure 1 This is a structure of a conventional hermetic connector. This type of hermetic connector uses glass sintering or injection molding sealing processes, filling the space between the copper pins and the housing with injection molding material or glass, making the pins and filling material a single unit to achieve a gas-tight seal. However, in this type of multi-core hermetic connector, the copper pins are exposed, resulting in low voltage withstand capability and inability to achieve insulation under high voltage. Since high-voltage resistant structures typically use PEEK material, the high temperatures used in glass sintering and injection molding sealing processes would damage the high-voltage sealing structure. Therefore, neither glass sintering nor injection molding sealing processes can achieve a one-piece molding of the high-voltage insulation structure.

[0004] like Figure 2 This is a schematic diagram of another type of airtight connector in the prior art. The connector tail uses a direct wire potting process to meet general insulation and sealing requirements, while also increasing the spacing between the electrical pins to improve the withstand voltage between electrical channels. However, because the high-voltage wire sheath of this type of airtight connector is mostly made of FEP material, and FEP has special properties that make it difficult to reliably bond the sheath with potting compound, when the tail wire is bent or subjected to stress, it can cause slight movement of the wire inside the potting compound, leading to airtightness failure. Furthermore, this type of airtight connector increases the spacing between the electrical pins, resulting in a larger size and poorer withstand voltage performance. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides a multi-core high-voltage hermetic connector that is small in size, high-voltage resistant, and highly hermetic.

[0006] This invention provides a multi-core high-voltage airtight connector, comprising a connector plug and a connector socket;

[0007] The connector plug contains a plug cable; the connector socket contains a socket cable.

[0008] The connector plug has a plug housing, the connector socket has a socket housing, the end of the plug housing is inserted into the socket housing, and is locked and fixed at the interface by a lock nut;

[0009] An insulating plate is sealed on the inner side of the end where the plug housing connects to the socket housing.

[0010] The plug insulation plate has several first sockets at its center; the number of first sockets is the same as the number of cores in the plug cable; each first socket is fixed with a copper pin by an insulating sealing ring.

[0011] The inner side of the end where the socket housing connects to the plug housing is sealed with a front insulating plate and a rear insulating plate.

[0012] The front and rear insulating plates of the socket are aligned and connected together by a sealing ring.

[0013] The front and rear insulating plates of the socket are provided with second sockets corresponding to the positions of several first sockets; each of the several second sockets is sealed with a copper socket.

[0014] The copper socket is covered with an insulating post.

[0015] A copper rod is fixedly installed inside the copper socket;

[0016] When the connector plug and connector socket are engaged, the copper pin is inserted into the copper socket and pressed against the copper rod to conduct current.

[0017] The connector has a plug tail cover, the end of which is threaded to the front end of the plug housing.

[0018] An adhesive base is provided to seal the plug tail cap and the plug housing;

[0019] The connector has a vulcanized end sleeve, which is vulcanized and fixed to the front end of the connector end cover.

[0020] The plug cable is sealed and fixed inside the center hole of the vulcanized tail sleeve and plug tail cover;

[0021] After the plug cable is stripped, each core passes through the adhesive base and is inserted into the first socket to connect with the corresponding copper pins.

[0022] The socket housing is threaded to the socket end cap at the front end;

[0023] A soft sealing gel is installed inside the socket end cap;

[0024] One end of the socket cable is inserted through the center hole of the socket end cap and fixed in the soft sealing gel.

[0025] The socket cable is secured to the front end of the socket end cap using a positioning nut.

[0026] After the socket cable is split into cores, it is connected to each copper rod through an equalizing cap.

[0027] The socket housing has a rigid insulating sealant near the copper socket hole to fix the copper rod and the split core of the socket cable.

[0028] Furthermore, the vulcanized tail sleeve is made of rubber.

[0029] Furthermore, the adhesive base has a conical cavity inside, and epoxy colloid is placed inside the conical cavity to bond the plug cable cores and the adhesive base into a whole.

[0030] Furthermore, both the plug end cap and the adhesive base are made of metal.

[0031] Furthermore, the plug insulation plate is made of PEEK material.

[0032] Furthermore, the surface of the copper socket is plated with gold.

[0033] Furthermore, a sealing ring and a sealing gasket are provided between the positioning nut and the socket cable.

[0034] Compared with existing technologies, the advantages of this invention are as follows: The multi-core high-voltage hermetic connector designed in this invention has a smaller overall size. Through the matching design of the plug and socket, PEEK insulating posts are used to increase the creepage distance between electrical paths. Simultaneously, the copper pins are installed inside the insulating posts, further increasing the creepage distance between the copper pins and other electrical paths or metal parts. After the plug and socket are mated, the insulating posts are inserted into the interior of the plug's insulating plate, and the copper pins and copper pins engage inside the insulating posts. Furthermore, because the insulating posts are inserted into the plug's insulating plate, the creepage distance between each electrical path is further increased. This solves the problem of low withstand voltage in existing multi-core hermetic connectors by increasing the high-voltage insulation design and hermetic structure design of the electrical paths in the connector, achieving a leakage rate ≤1×10⁻⁶. -9 m 3 Under the condition of / s, the electrical channel can meet the withstand voltage index of ≥30kVDC. At the same time, the use of hard insulating sealant at the connection points of the cable, copper pin and copper socket improves the overall withstand voltage and sealing performance. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of a gas-tight connector in the prior art;

[0036] Figure 2 This is a schematic diagram of another airtight connector in the prior art;

[0037] Figure 3 This is an overall cross-sectional view of the multi-core high-voltage airtight connector of the present invention;

[0038] Figure 4 This is an overall cross-sectional view of the connector plug of the present invention;

[0039] Figure 5 This is an overall cross-sectional view of the connection socket of the present invention.

[0040] in,

[0041] 1-Plug cable, 2-Socket cable, 3-Plug housing, 4-Socket housing, 5-Locking nut, 6-Plug insulating plate, 7-First socket, 8-Insulating sealing ring, 9-Copper pin, 10-Socket front insulating plate, 11-Socket rear insulating plate, 12-Sealing pressure ring, 13-Copper socket, 14-Insulating post, 15-Copper rod, 16-Plug tail cap, 17-Adhesive base, 18-Vulcanized tail sleeve, 19-Socket tail cap, 20-Soft sealing colloid, 21-Equalizing cap, 22-Hard insulating sealing colloid, 23-Conical cavity, 24-Epoxy colloid, 25-Positioning nut, 26-Sealing ring, 27-Sealing gasket. Detailed Implementation

[0042] The following description, with reference to the accompanying drawings, is provided to facilitate understanding of the technical solutions of the present invention by those skilled in the art. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention.

[0043] In the following detailed description, numerous specific details are set forth to provide a thorough understanding of the embodiments of the invention for ease of explanation. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concepts of the invention.

[0044] Please see Figure 1 The figures shown are overall cross-sectional views of the multi-core high-voltage airtight connector of the present invention. In this embodiment, it includes a connector plug and a connector socket. The connector plug and connector socket are used in conjunction. The connector plug contains a plug cable 1, and the connector socket contains a socket cable 2. The connector plug has a plug housing 3, and the connector socket has a socket housing 4. The end of the plug housing 3 is inserted into the socket housing 4 and locked at the interface by a locking nut 5.

[0045] Please combine Figure 1 and Figure 2As shown, in a specific implementation, a plug insulation plate 6 is sealed on the inner side of the end where the plug housing 3 connects to the socket housing 4. The plug insulation plate 6 is made of PEEK material, which has good insulation performance. The plug insulation plate 6 has several first sockets 7 at its center, the number of which corresponds to the number of cores in the plug cable 1. A copper pin 9 is fixedly installed in each first socket 7 by an insulating sealing ring 8. The insulating sealing ring 8 is made of silicone and serves to insulate and seal the electrical path. In a specific implementation, a hard insulating sealant is filled into the first socket 7 to seal the connection point between the copper pin 9 and the plug cable 1, ensuring that the connection point will not break down under high voltage conditions.

[0046] The inner side of the end where the socket housing 4 connects to the plug housing 3 is sealed with a front insulating plate 10 and a rear insulating plate 11. Both the front and rear insulating plates 10 and 11 are made of PEEK material, aligned and fixed together by a sealing ring 12. The front and rear insulating plates 10 and 11 have second sockets corresponding to the positions of several first sockets. Each of these second sockets has a sealed copper socket 13 with a gold-plated surface, serving as a contact for the electrical path. The copper socket 13 is inserted into the copper pin 9 of the plug to connect the path. The copper socket 13 is covered by an insulating post 14, which is secured between the front and rear insulating plates 10 and 11 via a keyway. A copper rod 15 is fixedly installed inside the copper socket 13. When the plug and socket are engaged, the copper pin 9 is inserted into the copper socket 13 and pressed against the copper rod 15 to conduct current.

[0047] In this embodiment, the connector includes a plug tail cover 16, the end of which is threaded to the front end of the plug housing 5. An adhesive seat 17 is sealed between the plug tail cover 16 and the plug housing 3. Both the plug tail cover 16 and the adhesive seat 17 are made of metal. The connector also includes a vulcanized tail sleeve 18, made of rubber, to protect the plug cable 1 from damage due to left-right twisting. The vulcanized tail sleeve 18 is vulcanized and fixed to the front end of the plug tail cover 16. The plug cable 1 is sealed and fixed within the central hole of the vulcanized tail sleeve 18 and the plug tail cover 16. After the insulation of the plug cable 1 is removed, each core passes through the adhesive seat 17 and is inserted into the corresponding first socket to connect with the copper pins 9.

[0048] In this embodiment, the front end of the socket housing 4 is threadedly connected to the socket end cap 19. A soft sealing gel 20 is provided inside the socket end cap 19. One end of the socket cable 2 passes through the central hole of the socket end cap 19 and is fixed in the soft sealing gel 20, so that it cannot move in the cavity, while also serving as an auxiliary air seal.

[0049] The socket cable 2 is fixed to the front end of the socket end cap 19 by a positioning nut 25. After the socket cable 2 is split into cores, it is connected to each copper rod 15 by an equalizing cap 21. A rigid insulating sealant 22 is sealed inside the socket housing 4 near the copper socket hole 13 to fix the copper rod 15 and the split cores of the socket cable 2, and to perform insulation sealing treatment.

[0050] In this embodiment, the adhesive base 17 has a conical cavity 23 inside, and epoxy colloid 24 is used to pot the conical cavity 23 to bond the core of the plug cable 1 and the adhesive base 17 into a whole.

[0051] In this embodiment, a sealing ring 26 and a sealing gasket 27 are provided between the positioning nut 25 and the socket cable 2 to increase the overall airtightness. Since the sealing ring 26 is made of silicone rubber, it will fit tightly against the socket cable 2 and the socket end cap 19 when compressed, achieving a mechanical seal and preventing gas from leaking from the outer sheath of the socket cable 2.

[0052] In summary, the multi-core high-voltage hermetic connector designed in this invention has a small overall size. Through the cooperative design of the plug and socket, and by using PEEK insulating posts 14 to increase the creepage distance between electrical paths, the insulating posts 14 are inserted into the plug insulation plate 6. The copper pins 9 and copper sockets 13 are mated inside the insulating posts 14. Furthermore, because the insulating posts 14 are inserted into the plug insulation plate, the creepage distance between each electrical path is further increased. This solves the problem of low withstand voltage in existing multi-core hermetic connectors, and enhances the high-voltage insulation design and hermetic structure design of the electrical paths in the connector, achieving a leakage rate ≤1×10⁻⁶. -9 m 3 Under the condition of / s, the electrical channel can meet the withstand voltage index of ≥30kVDC.

[0053] This embodiment adopts a high-voltage wire transition sealing structure, using a copper rod to transition between the cable and the copper socket 13, and then using a hard insulating sealant to pot the copper rod for gas sealing, which solves the problem that the high-voltage wire sheath and the adhesive cannot be well integrated, thereby achieving an overall airtight effect.

[0054] Meanwhile, this embodiment uses protruding insulating posts on the connector end face to increase the creepage distance and meet high-voltage insulation requirements. An insulating sealing ring 12 is also used to seal the interface between the socket insulating post and the plug insulating plate, increasing insulation reliability. This ensures that, under an airtight structure, the electrical path has high-voltage insulation functionality at the mating surfaces of the connector plug and socket.

[0055] Meanwhile, this embodiment uses a rigid insulating sealant 22 to ensure the insulation performance between the copper rods and to the metal shell, and uses an equalizing cap 21 to improve the extremely uneven electric field at the connection point between the copper rod 15 and the socket cable 2, making the electric field relatively uniform and increasing the reliability of the insulation performance. This achieves overall high-voltage insulation of the internal electrical channels of the connector.

[0056] Furthermore, this embodiment employs a combination of potting and mechanical sealing to achieve airtightness. Since high-voltage wire sheaths are mostly made of materials such as FEP and polyethylene, which have poor adhesive sealing performance, this embodiment uses a copper rod 17 as an adapter. The copper rod, being a metal material, has excellent adhesion to the customized rigid insulating sealant. The rigid insulating sealant 22 forms a sealed solid encapsulating the copper rod inside the socket housing through potting. The rigid insulating sealant 22 also adheres to the socket housing 4, achieving the primary gas seal.

[0057] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A multi-core high-voltage hermetic connector, characterized in that, Includes connector plugs and connector sockets; The connector plug is provided with a plug cable (1); the connector socket is provided with a socket cable (2); The connector has a connector housing (3), the connector has a connector housing (4), the end of the connector housing (3) is inserted into the connector housing (4), and is locked and fixed at the interface by a lock nut (5); A plug insulation plate (6) is sealed on the inner side of the end where the plug housing (3) is connected to the socket housing (4); The plug insulation plate (6) has a plurality of first sockets (7) at its center; the plurality of first sockets (7) are consistent with the number of cores in the plug cable (1); each first socket (7) is fixedly provided with a copper pin (9) by an insulating sealing ring (8); The socket housing (4) is sealed with a front insulating plate (10) and a rear insulating plate (11) on the inner side of the end where it is connected to the plug housing (3); The front insulating plate (10) and the rear insulating plate (11) of the socket are aligned and fixedly connected together by a sealing ring (12); The front insulating plate (10) and the rear insulating plate (11) of the socket are provided with second sockets corresponding to the positions of the plurality of first sockets; each of the plurality of second sockets is sealed with a copper socket (13); The copper socket (13) is covered with an insulating post (14) on its outer periphery; A copper rod (15) is fixedly installed inside the copper insertion hole (13); When the connector plug and connector socket are engaged, the copper pin (9) is inserted into the copper socket (13) and pressed against the copper rod (15) to conduct current. The connector has a plug tail cover (16), the end of which is threaded to the front end of the plug housing (3). An adhesive seat (17) is provided to seal between the plug tail cap (16) and the plug housing (3); The connector has a vulcanized tail sleeve (18), which is vulcanized and fixed to the front end of the connector tail cover (16). The plug cable (1) is integrally sealed and inserted into and fixed therein through the central hole of the vulcanized tail sleeve (18) and the plug tail cover (16); After the plug cable (1) is stripped, each core passes through the adhesive base (17) and is inserted into the first socket to connect with each copper pin (9). The socket housing (4) is threadedly connected to the socket end cap (19) at the front end; A soft sealing gel (20) is provided inside the socket end cap (19); One end of the socket cable (2) is inserted through the central hole of the socket end cap (19) and fixed in the soft sealing colloid (20); The socket cable (2) is fixed at the front end of the socket end cap (19) by a positioning nut (25); After the socket cable (2) is split into cores, it is connected to each copper rod (15) through an equalizing cap (21); The socket housing (4) is sealed with a hard insulating sealant (22) at one end near the copper socket (13) to fix the copper rod (15) and the core of the socket cable (2).

2. The multi-core high-voltage hermetic connector according to claim 1, characterized in that, The vulcanized tail sleeve (18) is made of rubber.

3. The multi-core high-voltage hermetic connector according to claim 2, characterized in that, The adhesive base (17) has a conical cavity (23) inside, and epoxy colloid (24) is provided inside the conical cavity (23) for bonding the core of the plug cable (1) and the adhesive base (17) to form a whole.

4. The multi-core high-voltage hermetic connector according to claim 3, characterized in that, Both the plug end cap (16) and the adhesive base (17) are made of metal.

5. The multi-core high-voltage hermetic connector according to claim 4, characterized in that, The plug insulation plate (6) is made of PEEK material.

6. The multi-core high-voltage hermetic connector according to claim 5, characterized in that, The copper socket (13) has a gold-plated layer on its surface.

7. The multi-core high-voltage hermetic connector according to claim 6, characterized in that, A sealing ring (26) and a sealing gasket (27) are provided between the positioning nut (25) and the socket cable (2).

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