Insulating plug and connector

Abstract

The utility model discloses an insulating plug and a connector, the insulating plug comprises a main body, and the main body comprises a first end face and a second end face which are oppositely arranged. The first end face is inwards provided with a fixing cavity in the axial direction, and a first shielding layer is arranged in the fixing cavity. The second end face is inwards provided with a shielding part in the axial direction, and the shielding part is partially embedded into the main body. By arranging the first shielding layer and the shielding part, high voltage and low voltage can be shielded at the same time, the problem that partial discharge easily occurs on the surface of the insulating plug is solved, and the electric field intensity of the surface of the insulating plug is reduced.

Description

Insulating plugs and connectors Technical Field

[0001] This utility model relates to the field of insulating plugs, and in particular to an insulating plug and a connector. Background Technology

[0002] In recent years, with the increase in urban population density, urban power load has surged. Insulating plugs are crucial components for the reliable connection of power cable systems to switchgear or transformers, serving as insulating products for enclosure and connection. Insulating plugs are typically used in conjunction with shielded, separable connectors to achieve fully insulated, fully sealed, and fully shielded connections between power cables and distribution equipment. They are suitable for medium and low voltage GIS switchgear, outdoor cable distribution boxes, and outdoor prefabricated substations, among other power equipment.

[0003] The shielding effect of existing insulating plug shielding structures is not stable, and partial discharge is prone to occur on the surface of the insulating plug, affecting the safe and stable operation of the system. Summary of the Invention

[0004] The main objective of this invention is to provide an insulating plug, comprising a main body, wherein the main body includes a first end face and a second end face disposed opposite to each other.

[0005] The first end face is provided with a fixing cavity along the axial direction, and a first shielding layer is provided inside the fixing cavity;

[0006] The second end face is provided with a shielding part along the axial direction inward, and the shielding part is partially embedded in the main body.

[0007] Optionally, in one embodiment of the present invention, the shielding part includes a shielding head and a connecting post connected to the shielding head, the shielding head being embedded in the main body, and the connecting post being partially embedded in the main body.

[0008] Optionally, in one embodiment of the present invention, the shielding head is curved, and the curved surface protrudes towards the first end face.

[0009] Optionally, in one embodiment of this utility model, the curved surface is a spherical cap.

[0010] Optionally, in one embodiment of the present invention, the end of the connecting post away from the first end face is flush with the second end face.

[0011] Optionally, in one embodiment of the present invention, the second end face is provided with an installation groove along the axial direction, one end of the connecting post passes through the bottom wall of the installation groove and is connected to the shield head, and the other end of the connecting post is accommodated in the installation groove.

[0012] Optionally, in one embodiment of this utility model, the mounting groove is a square groove.

[0013] Optionally, in one embodiment of the present invention, the outer wall of the end of the connecting post located in the mounting groove is provided with threads.

[0014] Optionally, in one embodiment of the present invention, the main body, the first shielding layer, and the shielding part are coaxially arranged.

[0015] Optionally, in one embodiment of the present invention, the main body is frustum-shaped, and the diameter of the first end face is smaller than the diameter of the second end face.

[0016] Optionally, in one embodiment of the present invention, a fixing groove is provided inward at the end of the first shielding layer away from the second end face;

[0017] And / or, the sidewall of the fixed cavity is provided with a protrusion, and the peripheral wall of the first shielding layer is provided with a groove corresponding to the protrusion, and the protrusion is limited to the groove.

[0018] Optionally, in one embodiment of this utility model, the main body is made of epoxy resin.

[0019] And / or, the first shielding layer, the main body, and the shielding part are integrally formed.

[0020] The present invention also proposes a connector, the connector including a housing, the housing having a first accommodating cavity, and the aforementioned insulating plug disposed within the first accommodating cavity.

[0021] Optionally, in one embodiment of the present invention, the housing includes a connecting portion and a rod portion connected to the connecting portion;

[0022] The connecting portion is provided with a second accommodating cavity along the axial direction, and the second accommodating cavity is connected to the first accommodating cavity;

[0023] The rod portion is provided with a third receiving cavity, and the first receiving cavity, the second receiving cavity, and the third receiving cavity are connected.

[0024] Optionally, in one embodiment of the present invention, the connector further includes a sleeve, a connecting rod, and a terminal.

[0025] One end of the sleeve is located inside the second accommodating cavity;

[0026] One end of the terminal is provided with a through hole, which is located between the first accommodating cavity and the second accommodating cavity. The connecting rod passes through the through hole to connect with the sleeve and the insulating plug.

[0027] The other end of the terminal is located in the third accommodating cavity.

[0028] Optionally, in one embodiment of the present invention, the connector further includes a rear cap, the rear cap including a cover and a connecting bolt connected to the cover, the cover covering the first accommodating cavity opening.

[0029] Optionally, in one embodiment of the present invention, a second shielding layer is provided at one end of the third accommodating cavity near the connecting portion.

[0030] This utility model of an insulating plug has a first shielding layer and a shielding part partially embedded in the main body at both ends. The first shielding layer can shield high voltage, and the shielding part can shield low voltage, thereby significantly reducing the electric field strength on the surface of the insulating plug and solving the problem of partial discharge on the surface of the original insulating plug. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0032] Figure 1 is a structural schematic diagram of an embodiment of the insulating plug of this utility model;

[0033] Figure 2 is a structural schematic diagram of an embodiment of the connector of this utility model.

[0034] Explanation of icon numbers:

[0035] 100. Insulating plug; 10. Main body; 11. First end face; 12. Second end face; 13. Fixing cavity; 131. Protrusion; 14. First shielding layer; 141. Groove; 15. Shielding part; 151. Shielding head; 152. Connecting post; 16. Mounting groove; 17. Fixing groove; 200. Connector; 21. Housing; 211. Connecting part; 212. Rod part; 22. First receiving cavity; 23. Second receiving cavity; 24. Third receiving cavity; 25. Sleeve; 26. Connecting rod; 27. Terminal; 28. Rear cap; 281. Cover; 282. Connecting bolt; 291. Second shielding layer; 292. Third shielding layer; 30. Cable; 31. Conductor; 32. Outer sheath.

[0036] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0039] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the term "and / or" throughout the text includes three solutions; taking A and / or B as an example, it includes technical solution A, technical solution B, and a technical solution that simultaneously satisfies A and B. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0040] In recent years, with the increase in urban population density, urban power load has surged. Insulating plugs are crucial components for the reliable connection of power cable systems to switchgear or transformers, serving as insulating products for enclosure and connection. Insulating plugs are typically used in conjunction with shielded, separable connectors to achieve fully insulated, fully sealed, and fully shielded connections between power cables and distribution equipment. They are suitable for medium and low voltage GIS switchgear, outdoor cable distribution boxes, and outdoor prefabricated substations, among other power equipment.

[0041] The shielding effect of existing insulating plug shielding structures is not stable, and partial discharge is prone to occur on the surface of the insulating plug, affecting the safe and stable operation of the system.

[0042] In view of this, the present invention proposes an insulating plug, which provides a first shielding layer and a shielding part at least partially embedded in the main body at both ends, so that the first shielding layer can shield high voltage and the shielding part can shield low voltage, thereby significantly reducing the electric field strength on the surface of the insulating plug and solving the problem that the original insulating plug is prone to partial discharge at the surface.

[0043] To better understand the above technical solution, a detailed explanation of the technical solution is provided below with reference to the accompanying drawings.

[0044] As shown in Figures 1-2, this utility model proposes an insulating plug 100, which includes a main body 10. The main body 10 includes a first end face 11 and a second end face 12 disposed opposite to each other. The first end face 11 is provided with a fixing cavity 13 along the axial direction inward, and a first shielding layer 14 is provided in the fixing cavity 13. The second end face 12 is provided with a shielding part 15 along the axial direction inward, and the shielding part 15 is partially embedded in the main body 10.

[0045] Understandably, by providing a first shielding layer 14 and a shielding part 15 at both ends of the main body 10, with the shielding part 15 partially embedded in the main body 10, the first shielding layer 14 can shield against high voltage, and the shielding part 15 can shield against low voltage. This significantly reduces the surface electric field strength of the insulating plug 100, solving the problem of partial discharge easily occurring on the surface of the original insulating plug 100. Because the shielding part 15 is partially embedded in the main body 10, the connection between the shielding part 15 and the main body 10 is more stable, further stabilizing the shielding effect of the shielding part 15 and enhancing the safe and stable operation of the system. In use, the shielding part 15 can be grounded to ensure that the insulating plug 100 has good low-voltage shielding performance.

[0046] Furthermore, in one embodiment of this utility model, the shielding part 15 includes a shielding head 151 and a connecting post 152 connected to the shielding head 151. The shielding head 151 is embedded in the main body 10, and the connecting post 152 is partially embedded in the main body 10. Preferably, the shielding head 151 is curved, and the curved surface protrudes towards the first end face 11. Preferably, the curved surface is a spherical cap.

[0047] Understandably, by embedding the shielding head 151 into the main body 10, the internal electric field of the insulating plug 100 is homogenized, preventing partial discharge inside and outside the insulating plug 100. By partially embedding the connecting post 152 into the main body 10, one end of the connecting post 152 is connected to the shielding head 151, and the other end of the connecting post 152 can be grounded, connected to a voltage testing point, or connected to an external live display through the part of the connecting post 152 not embedded in the main body 10. Understandably, the shape of the shielding head 151 can be various. Preferably, the shielding head 151 is curved, with the curved surface convex towards the first end face 11. Preferably, the spherical surface is a spherical crown. Understandably, by setting the shielding head 151 to a curved surface, especially a spherical crown shape, the internal electric field of the insulating plug 100 is further homogenized by changing the structure of the shielding head 151, improving the shielding effect of the shielding head 151, and enhancing the shielding performance against low voltage.

[0048] Furthermore, in one embodiment of this utility model, the end of the connecting post 152 that is away from the first end face 11 is flush with the second end face 12.

[0049] Understandably, by aligning the end of the connecting post 152 away from the first end face 11 with the second end face 12, it ensures that the connecting post 152 can be grounded, connected to the voltage testing point, or connected to an external live display, while also ensuring that the entire insulating plug 100 has the advantages of small size, light weight, and low cost.

[0050] Furthermore, in one embodiment of the present invention, the second end face 12 is provided with an installation groove 16 along the axial direction inward, one end of the connecting post 152 passes through the bottom wall of the installation groove 16 and is connected to the shielding head 151, and the other end of the connecting post 152 is accommodated in the installation groove 16.

[0051] Understandably, by providing a mounting groove 16 on the second end face 12 and partially placing the connecting post 152 within the mounting groove 16, the insulating plug 100 can be installed or removed using a wrench whose shape matches the mounting groove 16. When the wrench is applied to the insulating plug 100, the torque generated during installation or removal is only applied to the main body 10, preventing separation or cracking between the main body 10 and the shielding part 15. The connecting groove can be a square groove, a pentagonal groove, a hexagonal groove, etc. Preferably, the connecting groove is a square groove.

[0052] Furthermore, in one embodiment of this utility model, the outer wall of one end of the connecting post 152 located within the mounting groove 16 is provided with threads. It can be understood that by providing external threads on the connecting post 152, a grounding device can be detachably connected, or a voltage testing point or an external live display can be detachably connected.

[0053] Furthermore, in one embodiment of this utility model, the main body 10, the first shielding layer 14, and the shielding part 15 are coaxially arranged.

[0054] Understandably, by coaxially arranging the main body 10, the first shielding layer 14, and the shielding part 15, the surface electric field strength of the insulating plug 100 is significantly reduced, thereby improving the shielding performance of the insulating plug 100.

[0055] Furthermore, in one embodiment of this utility model, the main body 10 is frustum-shaped, and the diameter of the first end face 11 is smaller than the diameter of the second end face 12.

[0056] Understandably, the main body 10 is frustum-shaped, and the diameter of the first end face 11 is smaller than the diameter of the second end face 12, making it easier for the first end face 11 to be inserted into the connector 200. At the same time, by providing a first shielding layer 14 on the smaller diameter first end face 11 and a shielding part 15 on the larger diameter second end face 12, it is convenient for the first shielding layer 14 to shield high voltage and the shielding part 15 to shield low voltage.

[0057] Furthermore, in one embodiment of the present invention, the end of the first shielding layer 14 away from the second end face 12 is provided with a fixing groove 17 inward; and / or, the side wall of the fixing cavity 13 is provided with a protrusion 131, and the peripheral wall of the first shielding layer 14 is provided with a groove 141 corresponding to the protrusion 131, and the protrusion 131 is limited to the groove 141.

[0058] Understandably, by providing a fixing groove 17 inward at the end of the first shielding layer 14 away from the second end face 12, the connecting rod 26 of the connector 200 is conveniently fixedly connected to the insulating plug 100 through the fixing groove 17. Preferably, the inner wall of the fixing groove 17 is provided with an internal thread. The connecting rod 26 may be provided with an external thread, and the external thread on the connecting rod 26 is threadedly connected to the internal thread in the fixing groove 17. Preferably, the side wall of the fixing cavity 13 is provided with a protrusion 131, and the peripheral wall of the first shielding layer 14 is provided with a groove 141 corresponding to the protrusion 131. The protrusion 131 is confined within the groove 141, thereby preventing the first shielding layer 14 from falling off the fixing cavity 13.

[0059] Furthermore, in one embodiment of the present invention, the main body 10 is made of epoxy resin, and / or the first shielding layer 14, the main body 10 and the shielding part 15 are integrally formed.

[0060] Understandably, the main body 10 may be made of an insulating material. Preferably, the main body 10 is made of epoxy resin. Understandably, by integrally molding the first shielding layer 14, the main body 10, and the shielding portion 15, so that the first shielding layer 14 and the shielding portion 15 are respectively embedded inside the main body 10, the strength and stability of the insulating plug 100 can be enhanced.

[0061] The present invention also provides a connector 200, which includes a housing 21 and a first accommodating cavity 22 on the housing 21, wherein the aforementioned insulating plug 100 is disposed in the first accommodating cavity 22.

[0062] Understandably, the size of the insulating plug 100 matches the size of the first receiving cavity 22. When installing the insulating plug 100 into the first receiving cavity 22, the first end face 11 of the insulating plug 100 faces the first receiving cavity 22 and the first end face 11 is pushed into the first receiving cavity 22. The insulating plug 100 is then pushed into the first receiving cavity 22 so that the body 10 between the first end face 11 and the second end face 12 abuts against the cavity wall of the first receiving cavity 22.

[0063] Furthermore, in one embodiment of the present invention, the housing 21 includes a connecting portion 211 and a rod portion 212 connected to the connecting portion 211; the connecting portion 211 is provided with a second accommodating cavity 23 along the axial direction, and the second accommodating cavity 23 communicates with the first accommodating cavity 22; the rod portion 212 is provided with a third accommodating cavity 24, and the first accommodating cavity 22, the second accommodating cavity 23 and the third accommodating cavity 24 communicate with each other.

[0064] Understandably, the housing 21 of the connector 200 includes a connecting portion 211 and a stem portion 212, with the stem portion 212 connected in the middle to make the entire connector 200 T-shaped. The connecting portion 211 has a first receiving cavity 22 and a second receiving cavity 23 at its two ends, which communicate with each other. The stem portion 212 has a third receiving cavity 24 along its axial direction, which communicates with the first receiving cavity 22 and the second receiving cavity 23. Preferably, the housing 21 is further covered with a third shielding layer 292. Preferably, the third shielding layer 292 is made of conductive rubber.

[0065] Furthermore, in one embodiment of the present invention, the connector 200 further includes a sleeve 25, a connecting rod 26, and a terminal 27. One end of the sleeve 25 is disposed in the second accommodating cavity 23; one end of the terminal 27 is provided with a through hole, which is disposed between the first accommodating cavity 22 and the second accommodating cavity 23, and the connecting rod 26 passes through the through hole to connect with the sleeve 25 and the insulating plug 100; the other end of the terminal 27 is disposed in the third accommodating cavity 24.

[0066] Understandably, one end of terminal 27 is located between the first accommodating cavity 22 and the second accommodating cavity 23, and the other end of terminal 27 passes through the third accommodating cavity 24. Terminal 27 has a through hole at one end located in the first accommodating cavity 22 and the second accommodating cavity 23, and connecting rod 26 passes through the through hole. One end of connecting rod 26 is connected to the first shielding layer 14 of insulating plug 100, and the other end of connecting rod 26 is connected to sleeve 25. Cable 30 includes conductor 31 and an outer sheath 32 covering the outer surface of conductor 31. Cable 30 passes through the third accommodating cavity 24, and conductor 31 and terminal 27 of cable 30 are connected at one end located in the third accommodating cavity 24. Preferably, the third accommodating cavity 24 has a second shielding layer 291 near the connecting portion 211, and part of terminal 27 is located in the second shielding layer 291, thereby further improving the shielding performance of the entire connector 200.

[0067] Furthermore, in one embodiment of the present invention, the connector 200 further includes a rear cap 28, which includes a cover 281 and a connecting bolt 282 connected to the cover 281. The cover 281 covers the opening of the first accommodating cavity 22.

[0068] Understandably, the shape of the connecting bolt 282 matches the shape of the mounting groove 16, and the connecting bolt 282 has a relief groove that matches the shape of the connecting post 152. When the connecting bolt 282 is installed in the mounting groove 16, the connecting post 152 is inserted into the relief groove of the connecting bolt 282, and the periphery of the cover 281 abuts against the outer edge of the connecting part 211 so that the cover 281 covers the opening of the first receiving cavity 22.

[0069] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

[0070] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. An insulating plug (100) comprising a body (10), said body (10) including a first end face (11) and a second end face (12) disposed opposite to each other, characterized in that, The first end face (11) is provided with a fixing cavity (13) along the axial direction, and a first shielding layer (14) is provided in the fixing cavity (13); the second end face (12) is provided with a shielding part (15) along the axial direction, and the shielding part (15) is partially embedded in the main body (10).

2. An insulating plug (100) as described in claim 1, characterized in that, The shielding part (15) includes a shielding head (151) and a connecting post (152) connected to the shielding head (151). The shielding head (151) is embedded in the main body (10), and the connecting post (152) is partially embedded in the main body (10).

3. An insulating plug (100) as described in claim 2, characterized in that, The shielding head (151) is curved, and the curved surface protrudes in the direction of the first end face (11).

4. An insulating plug (100) as described in claim 3, characterized in that, The surface is a spherical cap.

5. An insulating plug (100) as described in claim 2, characterized in that, The end of the connecting post (152) away from the first end face (11) is flush with the second end face (12).

6. An insulating plug (100) as described in claim 2, characterized in that, The second end face (12) is provided with an installation groove (16) along the axial direction. One end of the connecting post (152) passes through the bottom wall of the installation groove (16) and is connected to the shield head (151). The other end of the connecting post (152) is accommodated in the installation groove (16).

7. An insulating plug (100) as described in claim 6, characterized in that, The mounting slot (16) is a square slot.

8. An insulating plug (100) as described in claim 6, characterized in that, The connecting post (152) has threads on the outer wall of one end located in the mounting groove (16).

9. An insulating plug (100) as described in claim 1, characterized in that, The main body (10), the first shielding layer (14), and the shielding part (15) are arranged coaxially.

10. An insulating plug (100) as described in claim 1, characterized in that, The main body (10) is frustum shaped, and the diameter of the first end face (11) is smaller than the diameter of the second end face (12).

11. An insulating plug (100) as described in claim 1, characterized in that, The first shielding layer (14) has a fixing groove (17) at one end away from the second end face (12); and / or, the side wall of the fixing cavity (13) has a protrusion (131), and the peripheral wall of the first shielding layer (14) has a groove (141) corresponding to the protrusion (131), and the protrusion (131) is located within the groove (141).

12. An insulating plug (100) as described in any one of claims 1-11, characterized in that, The main body (10) is made of epoxy resin, and / or the first shielding layer (14), the main body (10) and the shielding part (15) are integrally formed.

13. A connector (200), characterized in that, The connector (200) includes a housing (21) having a first accommodating cavity (22) thereon, and an insulating plug (100) as described in any one of claims 1-12 is disposed in the first accommodating cavity (22).

14. The connector (200) as claimed in claim 13, characterized in that, The housing (21) includes a connecting part (211) and a rod part (212) connected to the connecting part (211); the connecting part (211) is provided with a second accommodating cavity (23) along the axial direction, and the second accommodating cavity (23) and the first accommodating cavity (22) are connected; the rod part (212) is provided with a third accommodating cavity (24), and the first accommodating cavity (22), the second accommodating cavity (23) and the third accommodating cavity (24) are connected.

15. The connector (200) as claimed in claim 14, characterized in that, The connector (200) further includes a sleeve (25), a connecting rod (26), and a terminal (27). One end of the sleeve (25) is disposed in the second accommodating cavity (23). One end of the terminal (27) is provided with a through hole, which is disposed between the first accommodating cavity (22) and the second accommodating cavity (23). The connecting rod (26) passes through the through hole to connect with the sleeve (25) and the insulating plug (100). The other end of the terminal (27) is disposed in the third accommodating cavity (24).

16. The connector (200) as claimed in claim 15, characterized in that, The connector (200) further includes a rear cap (28), which includes a cover (281) and a connecting bolt (282) connected to the cover (281), the cover (281) covering the opening of the first accommodating cavity (22).

17. The connector (200) as claimed in claim 15, characterized in that, The third accommodating cavity (24) has a second shielding layer (291) at one end near the connecting part (211).

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