Inner cone plug-in terminal

Abstract

The utility model discloses an inner cone plug-in terminal, which comprises a connecting part and a stress cone surrounding the outer wall of the connecting part, the connecting part comprises a cable, a connecting pipe, a contact finger and a conductive part, and the cable comprises a cable core and an insulating layer wrapping the outer wall of the cable core; the connecting pipe is sleeved on the outer wall of the wire core; one end, close to the cable, of the contact finger is connected with the connecting pipe; the conductive part is arranged at one end, far away from the cable, of the contact finger, and is connected with the contact finger. According to the technical scheme, the overall connection stability and reliability of the connecting part are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage cable accessories, in particular to an inner cone plug-in terminal. Background Art

[0002] The inner cone plug-in terminal is usually used for power transmission and transformation lines below 42kV, and is used in indoor and outdoor environments in conjunction with C-GIS switchgear and transformers. The conductive structure in the side expansion bushing in the C-GIS switchgear also needs to be connected to the high-voltage lead for electrical performance testing. However, due to the particularity of the shape of the conductive part in the side expansion bushing, the overall connection stability and reliability of the conductive connection part of the inner cone plug-in terminal in the existing side expansion bushing are not high, and the existing inner cone plug-in terminal is no longer applicable. Utility Model Content

[0003] The main purpose of the utility model is to provide an inner cone plug-in terminal, aiming to improve the overall connection stability and reliability of the conductive connection part of the inner cone plug-in terminal.

[0004] To achieve the above object, the utility model provides an inner cone plug-in terminal, the inner cone plug-in terminal comprising a connecting portion, a stress cone surrounding the outer wall of the connecting portion, characterized in that the connecting portion comprises:

[0005] A cable, comprising a wire core and an insulating layer wrapped around an outer wall of the wire core;

[0006] A connecting tube, the connecting tube is sleeved on the outer wall of the wire core;

[0007] A contact finger, wherein one end of the contact finger close to the cable is connected to the connecting tube;

[0008] The conductive part is arranged at one end of the contact finger away from the cable and connected to the contact finger.

[0009] Optionally, a groove is axially provided at one end of the contact finger close to the cable, and the connecting tube is clamped in the groove; a connector is axially provided at one end of the contact finger away from the cable, and the conductive part is provided with a connecting cavity corresponding to the connecting head, and the connecting head is connected to the wall of the connecting cavity.

[0010] Optionally, an outer side wall of the connector is provided with an external thread, and a wall of the connecting cavity is correspondingly provided with an internal thread, and the connector and the connecting cavity are connected via the internal thread and the external thread.

[0011] Optionally, the inner cone plug-in terminal further includes a sleeve surrounding the stress cone and the outer wall of the connecting portion.

[0012] Optionally, the sleeve includes a first part and a second part, the first part is provided with a receiving cavity along the axial direction, the second part is provided with a wire passing cavity along the axial direction, the second part is arranged around the outer wall of the cable, and the receiving cavity is away from one end of the cable and abuts against the conductive part.

[0013] Optionally, a first shielding layer is provided on the wall of the accommodating cavity.

[0014] Optionally, the outer side wall of the second portion is provided with a second shielding layer.

[0015] Optionally, the sleeve is provided with a first hole and a second hole which are interconnected along the axial direction, the first part is arranged in the second hole, and the conductive part is arranged in the first hole.

[0016] Optionally, the inner cone plug-in terminal further comprises a fixing portion, one end of which is position-limitingly connected to the conical surface of the stress cone, and the other end of which is connected to a device housing.

[0017] Optionally, the inner cone plug-in terminal further comprises a locking portion, an end of the fixing portion away from the stress cone is provided with a through hole, and the locking portion passes through the through hole and is connected to the device housing.

[0018] A technical solution of the utility model is designed to design an inner cone plug-in terminal in view of the particularity of the shape of the conductive part of the side expansion sleeve. The connection part of the inner cone plug-in terminal includes a cable, a connecting tube, a contact finger and a conductive part. The connecting tube is sleeved on the outer wall of the cable core; the end of the contact finger close to the cable is connected to the connecting tube; the conductive part is arranged at the end of the contact finger away from the cable and is connected to the contact finger. The technical solution of the utility model introduces the contact finger and the connecting tube into the connection part, thereby ensuring that the switch cabinet can be tested for electrical performance through the conductive part in the side expansion sleeve, and the electrical connection of the entire conductive connection part is stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 It is a cross-sectional view of an embodiment of the inner cone plug-in terminal of the utility model.

[0021] Figure 2 It is a cross-sectional view of an embodiment of the connecting portion of the utility model.

[0022] Figure 3It is a cross-sectional view of an embodiment of the sleeve of the utility model.

[0023] Description of Figure Numbers:

[0024] 1. Connecting part; 11. Conductive part; 111. Connecting cavity; 12. Contact finger; 121. Groove; 122. Connector; 13. Connecting tube; 14. Cable; 141. Wire core; 142. Insulating layer; 2. Stress cone; 21. First part; 211. Accommodating cavity; 212. First shielding layer; 22. Second part; 221. Wire cavity; 222. Second shielding layer; 3. Sleeve; 31. First hole; 32. Second hole; 4. Fixing part; 5. Locking part; 6. Equipment housing.

[0025] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, "and / or" in the full text includes three solutions. Taking A and / or B as an example, it includes technical solution A, technical solution B, and technical solution that satisfies both A and B; in addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0031] The inner cone plug-in terminal is usually used for power transmission and transformation lines below 42kV, and is used in indoor and outdoor environments with C-GIS switchgear and transformers. The conductive structure in the side expansion bushing of the C-GIS switchgear also needs to be connected to the high-voltage lead for electrical performance testing. However, due to the special shape of the conductive part in the side expansion bushing, the overall connection stability and reliability of the conductive connection part of the inner cone plug-in terminal in the existing side expansion bushing are not high, and the existing inner cone plug-in terminal is no longer applicable.

[0032] In view of this, the utility model proposes an inner cone plug-in terminal.

[0033] Please refer to Figure 1-3 In an embodiment of the utility model, the inner cone plug-in terminal includes a connecting part 1, a stress cone 2 surrounding the outer wall of the connecting part 1, the connecting part 1 includes a cable 14, a connecting tube 13, a contact finger 12 and a conductive part 11, the cable 14 includes a core 141 and an insulating layer 142 wrapped around the outer wall of the core 141; the connecting tube 13 is sleeved on the outer wall of the core 141; the end of the contact finger 12 close to the cable 14 is connected to the connecting tube 13; the conductive part 11 is arranged at the end of the contact finger 12 away from the cable 14, and is connected to the contact finger 12.

[0034] According to the present embodiment, the connection part 1 includes a cable 14, a connection tube 13, a contact finger 12 and a conductive part 11. The cable 14 includes a metal conductive wire core 141 and an insulating layer 142 wrapped around the outer wall of the wire core 141. In order to make the wire core 141 and the conductive part 11 more stably and reliably electrically connected, a contact finger 12 is further provided between the cable 14 and the conductive part 11. One end of the contact finger 12 is connected to the conductive part 11. Since the wire core 141 cannot be directly connected to the contact finger 12, a connection tube 13 is provided on the outer wall of one end of the wire core 141 close to the contact finger 12. The other end of the contact finger 12 is connected to the connection tube 13. In a specific implementation, the connection tube 13 can be firstly sleeved on the wire core 141, and then the connection tube 13 can be pressed once using a pressing tool to fix the connection tube 13 and the wire core 141.

[0035] It can be understood that, for example, the side expansion bushing 3 in the C-GIS switch cabinet, due to the special shape of the conductive part 11, the connection stability and reliability between the conductive part 11 and the wire core 141 are not high. By introducing the contact finger 12 and the connecting tube 13, the wire core 141 is reliably connected to the contact finger 12 through the connecting tube 13, and the contact finger 12 can also be highly reliably connected to the conductive part 11, thereby improving the stability and reliability of the electrical connection of the entire connecting part 1.

[0036] In one embodiment of the utility model, a groove 121 is axially provided at one end of the contact finger 12 close to the cable 14, and the connecting tube 13 is clamped in the groove 121; a connector 122 is axially provided at one end of the contact finger 12 away from the cable 14, and the conductive portion 11 is provided with a connecting cavity 111 corresponding to the connecting cavity 122, and the connecting head 122 is connected to the cavity wall of the connecting cavity 111.

[0037] Through this embodiment, a groove 121 is provided on the contact finger 12, and the connection tube 13 is clamped in the groove 121, thereby further strengthening the stability of the connection between the connection tube 13 and the contact finger 12; a connector 122 is provided at the end of the contact finger 12 away from the cable 14, and a connecting cavity 111 is provided at the portion of the conductive part 11 corresponding to the connector 122, and the electrical connection between the contact finger 12 and the conductive part 11 is achieved through the connection between the connector 122 and the cavity wall of the connecting cavity 111, and the conductive part 11 and the wire core 141 are connected by introducing the contact finger 12 and the connecting tube 13, thereby ensuring the stability of the electrical connection between the wire core 141 and the conductive part 11.

[0038] In an embodiment of the present invention, the outer wall of the connector 122 is provided with an external thread, and the wall of the connecting cavity 111 is correspondingly provided with an internal thread, and the connector 122 and the connecting cavity 111 are connected via the internal thread and the external thread.

[0039] In this embodiment, corresponding external threads and internal threads are respectively provided on the outer wall of the connecting head 122 and the wall of the connecting cavity 111. The internal and external threads enable the connecting head 122 and the connecting cavity 111 to be detachably connected, which not only facilitates assembly but also facilitates maintenance.

[0040] In one embodiment of the utility model, the inner cone plug-in terminal further includes a sleeve 3 surrounding the stress cone 2 and the outer wall of the connecting portion 1. Further, the sleeve 3 includes a first portion 21 and a second portion 22, the first portion 21 is provided with an accommodating cavity 211 along the axial direction, the second portion 22 is provided with a wire passing cavity 221 along the axial direction, the second portion 22 is arranged around the outer wall of the cable 14, and the accommodating cavity 211 is away from one end of the cable 14 and abuts against the conductive portion 11.

[0041] It can be understood that the sleeve 3 has a first part 21 and a second part 22, the first part 21 has a accommodating cavity 211, and the second part 22 has a wire passing cavity 221. The cable 14 passes through the wire passing cavity 221, so that the second part 22 is arranged around the outer wall of the cable 14. At the same time, the contact finger 12 is respectively connected to the wire core 141 and the conductive part 11 in the accommodating cavity 211, and the accommodating cavity 211 is away from the end of the cable 14 and abuts against the conductive part 11.

[0042] In one embodiment of the utility model, the wall of the accommodating cavity 211 is provided with a first shielding layer 212. It can be understood that the conductive part 11 has a sharp tip due to its uneven outer surface, which easily makes the local electric field strong. By providing the first shielding layer 212 on the wall of the accommodating cavity 211, the local electric field strength is prevented from being too strong and causing breakdown.

[0043] In an embodiment of the present invention, the outer wall of the second part 22 is provided with a second shielding layer 222. It can be understood that in order to achieve full shielding and touchability of the entire inner cone plug-in terminal, the outer wall of the second part 22 is provided with a second shielding layer 222, thereby improving the safety performance of the entire inner cone plug-in terminal.

[0044] In one embodiment of the utility model, the sleeve 3 is provided with a first hole 31 and a second hole 32 that are interconnected along the axial direction, the first part 21 is provided in the second hole 32, and the conductive part 11 is provided in the first hole 31. It can be understood that by providing the first part 21 in the second hole 32 and the conductive part 11 in the first hole 31, the conductive part 11 and the stress cone 2 are in contact with the inner wall of the sleeve 3 at the same time, so that the structure of the entire inner cone plug-in terminal is more stable. Optionally, the outer wall diameter of the first part 21 is larger than the outer diameter of the conductive part 11, so the aperture of the second hole 32 is larger than the aperture of the first hole 31.

[0045] In one embodiment of the utility model, the inner cone plug-in terminal further includes a fixing portion 4, one end of the fixing portion 4 is limitedly connected to the conical surface of the stress cone 2, and the other end of the fixing portion 4 is connected to the device housing 6. Further, the inner cone plug-in terminal further includes a locking portion 5, and one end of the fixing portion 4 away from the stress cone 2 is provided with a through hole, and the locking portion 5 passes through the through hole and is connected to the device housing 6.

[0046] It can be understood that in order to ensure the stability of the overall structure of the inner cone plug-in terminal and the stability of the connection with the device housing 6, one end of the fixing portion 4 is limitedly connected to the conical surface of the stress cone 2, and the other end of the fixing portion 4 is connected to the device housing 6 through the locking portion 5. Optionally, the locking portion 5 includes a bolt and a nut, one end of the bolt is provided with a nut, and the other end passes through a through hole at one end of the fixing portion 4 away from the stress cone 2 to be connected to the device housing 6.

[0047] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An inner cone plug-in terminal, comprising a connecting portion (1), a stress cone (2) surrounding an outer wall of the connecting portion (1), characterized in that: The connecting portion (1) comprises: A cable (14), the cable (14) comprising a wire core (141) and an insulating layer (142) wrapped around an outer wall of the wire core (141); A connecting tube (13), wherein the connecting tube (13) is sleeved on the outer wall of the wire core (141); A contact finger (12), wherein one end of the contact finger (12) close to the cable (14) is connected to the connecting tube (13); A conductive portion (11), the conductive portion (11) being arranged at an end of the contact finger (12) away from the cable (14) and connected to the contact finger (12).

2. The inner cone plug-in terminal according to claim 1, characterized in that: A groove (121) is axially arranged at one end of the contact finger (12) close to the cable (14), and the connecting tube (13) is snap-fitted into the groove (121); a connector (122) is axially arranged at one end of the contact finger (12) away from the cable (14), and a connecting cavity (111) is provided on the conductive part (11) corresponding to the connector (122), and the connector (122) is connected to the cavity wall of the connecting cavity (111).

3. The inner cone plug-in terminal according to claim 2, characterized in that: An external thread is provided on the outer wall of the connecting head (122), and an internal thread is correspondingly provided on the wall of the connecting cavity (111); the connecting head (122) and the connecting cavity (111) are connected via the internal thread and the external thread.

4. The inner cone plug-in terminal according to claim 1, characterized in that: The inner cone plug-in terminal also includes a sleeve (3) surrounding the stress cone (2) and the outer wall of the connecting portion (1).

5. The inner cone plug-in terminal according to claim 4, characterized in that: The sleeve (3) comprises a first portion (21) and a second portion (22); the first portion (21) is provided with a receiving cavity (211) along the axial direction; the second portion (22) is provided with a wire passing cavity (221) along the axial direction; the second portion (22) is arranged around the outer wall of the cable (14); and the receiving cavity (211) is in contact with the conductive portion (11) at one end away from the cable (14).

6. The inner cone plug-in terminal according to claim 5, characterized in that: The cavity wall of the accommodating cavity (211) is provided with a first shielding layer (212).

7. The inner cone plug-in terminal according to claim 6, characterized in that: A second shielding layer (222) is provided on the outer side wall of the second portion (22).

8. The inner cone plug-in terminal according to claim 5, characterized in that: The sleeve (3) is provided with a first hole (31) and a second hole (32) which are connected to each other along the axial direction; the first part (21) is arranged in the second hole (32); and the conductive part (11) is arranged in the first hole (31).

9. The inner cone plug-in terminal according to claim 8, characterized in that: The inner cone plug-in terminal also includes a fixing portion (4), one end of the fixing portion (4) is position-limitingly connected to the conical surface of the stress cone (2), and the other end of the fixing portion (4) is connected to a device housing (6).

10. The inner cone plug-in terminal according to claim 9, characterized in that: The inner cone plug-in terminal also includes a locking portion (5), and an end of the fixing portion (4) away from the stress cone (2) is provided with a through hole, and the locking portion (5) passes through the through hole and is connected to the device housing (6).

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