Cable terminal and cable system

Abstract

The utility model discloses a cable terminal and a cable system, and the cable terminal comprises a sleeve; the stress cone is arranged in the sleeve, and the stress cone is provided with a first cable passing channel; the base comprises a first connecting part and a second connecting part connected to the bottom end of the first connecting part, the first connecting part is arranged in the sleeve and connected with the bottom of the stress cone, and the first connecting part is provided with a second cable passing channel communicated with the first cable passing channel; oil storage gaps are formed between the outer side wall of the first connecting part and the inner side wall of the sleeve and between the outer wall side of the stress cone and the inner side wall of the sleeve, and the second connecting part extends out of the bottom end of the sleeve and is in sealed connection with the bottom end of the sleeve; and the sealing assembly is arranged in the second cable passing channel, and the sealing assembly is used for sealing between the inner wall of the first connecting part and the outer wall of the cable arranged in the second cable passing channel in a penetrating manner. The cable terminal provided by the utility model is beneficial to improving the sealing effect on the insulating oil.

Description

Technical Field

[0001] The utility model relates to the technical field of cable systems, and particularly relates to a cable terminal and a cable system. Background Art

[0002] Figure 1 Shown is an oil-filled cable terminal in the related art. The sealing method at the tail of the stress cone 200 inside it is to wind a sealing member (usually a strip) between the stress cone 200 and the base 300 for sealing. This method is prone to the problem that the tail seal of the stress cone fails due to improper manual operation (the strip does not achieve effective sealing when winding the strip). In this way, the insulating oil 401 in the oil storage gap 400 will leak from the tail seal of the stress cone 200, and the leaked insulating oil 401 will inevitably enter the gap between the base 300 and the cable 10, and then flow to the outside. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a cable terminal, which is beneficial to improving the sealing effect of insulating oil.

[0004] The utility model also provides a cable system having the above cable terminal.

[0005] The cable terminal according to the first aspect embodiment of the utility model includes: a bushing; a stress cone disposed inside the bushing, the stress cone being provided with a first cable passing channel; a base including a first connecting portion and a second connecting portion connected to the bottom end of the first connecting portion, the first connecting portion being disposed inside the bushing and connected to the bottom of the stress cone, the first connecting portion being provided with a second cable passing channel communicating with the first cable passing channel, an oil storage gap is formed between the outer side wall of the first connecting portion and the inner side wall of the bushing, and between the outer wall side of the stress cone and the inner side wall of the bushing. The second connecting portion extends out from the bottom end of the bushing and is hermetically connected to the bottom end of the bushing; a sealing assembly disposed inside the second cable passing channel, the sealing assembly being used for sealing between the inner wall of the first connecting portion and the outer wall of the cable passing through the second cable passing channel.

[0006] The cable terminal according to the embodiment of the utility model has at least the following beneficial effects:

[0007] In the cable terminal of the present utility model, the cable can pass through the second cable passing channel and the first cable passing channel in sequence. If the insulating oil in the oil storage gap leaks, then the insulating oil may enter the gap between the inner wall of the first connection part and the outer wall of the cable from the butt joint of the first connection part and the stress cone. By arranging the sealing assembly in the second cable passing channel, the sealing assembly can seal the gap between the inner wall of the first connection part and the outer wall of the cable, thereby achieving the purpose of sealing and preventing oil leakage.

[0008] According to some embodiments of the present utility model, a supporting part is provided on the inner wall of the first connection part, and the sealing assembly is supported by the supporting part.

[0009] According to some embodiments of the present utility model, the sealing assembly includes a first sealing ring arranged on the supporting part and a pressing unit pressing on one side of the first sealing ring away from the supporting part.

[0010] According to some embodiments of the present utility model, the first sealing ring is an elastic member, and the outer edge of the lower end of the first sealing ring has a first conical surface, and the outer edge of the upper end of the first sealing ring has a second conical surface;

[0011] The upper side surface of the supporting part has a third conical surface, the third conical surface fits with the first conical surface, the pressing unit has a fourth conical surface, and the fourth conical surface fits with the second conical surface.

[0012] According to some embodiments of the present utility model, the pressing unit is threadedly connected to the first connection part, and the pressing unit can be operably moved along the axial direction of the first connection part.

[0013] According to some embodiments of the present utility model, the pressing unit includes a pressing ring pressing on one side of the first sealing ring away from the supporting part and a tightening ring pressing on the pressing ring. The tightening ring is threadedly connected to the first connection part, and the tightening ring can be operably moved along the axial direction of the first connection part.

[0014] According to some embodiments of the present utility model, the bottom end of the stress cone is sleeved outside the first connection part, and the bottom end of the stress cone is in interference fit with the first connection part.

[0015] According to some embodiments of the present utility model, a sealing member is arranged in the oil storage gap. The sealing member seals the connection part between the first connection part and the stress cone, and the sealing member is spaced from the inner side wall of the casing.

[0016] According to some embodiments of the present utility model, a second sealing ring is provided between the second connection part and the bottom end of the casing.

[0017] A cable system according to an embodiment of the second aspect of the present utility model includes: the cable terminal as described above; a cable that passes through the first cable passing channel and the second cable passing channel, and the outer wall of the cable is sealingly fitted with the sealing assembly.

[0018] The cable system according to an embodiment of the present utility model has at least the following beneficial effects:

[0019] In the cable system of the present utility model, the cable can pass through the second cable passing channel and the first cable passing channel in sequence. If the insulating oil in the oil storage gap leaks, then the insulating oil may enter the gap between the inner wall of the first connecting part and the outer wall of the cable from the butt joint of the first connecting part and the stress cone. By arranging the sealing assembly in the second cable passing channel, the sealing assembly can seal the gap between the inner wall of the first connecting part and the outer wall of the cable, so as to achieve the purpose of sealing and preventing oil leakage.

[0020] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0021] The following further describes the present utility model in conjunction with the drawings and embodiments, where:

[0022] Figure 1 is a schematic structural diagram of a cable system in the related art;

[0023] Figure 2 is a schematic structural diagram of a cable system according to an embodiment of the present utility model;

[0024] Figure 3 is Figure 2 an enlarged view of part A in

[0025] Figure 4 is an exploded structural diagram of a sealing assembly and a base according to an embodiment of the present utility model.

[0026] Reference Numerals in the Drawings:

[0027] 10. Cable;

[0028] 100. Sleeve;

[0029] 200. Stress cone; 201. First cable passing channel;

[0030] 300. Base; 310. First connecting part; 311. Second cable passing channel; 312. Supporting part; 3121. Third conical surface; 320. Second connecting part;

[0031] 400. Oil storage gap; 410. Insulating oil;

[0032] 500, Sealing assembly; 510, First sealing ring; 511, First conical surface; 512, Second conical surface; 520, Compression unit; 521, Pressing ring; 5211, Fourth conical surface; 522, Tightening ring;

[0033] 600, Sealing element;

[0034] 700, Second sealing ring. Specific embodiments

[0035] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0036] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0037] In the description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0038] Combined with Figure 2 And Figure 3 , A cable system provided by an embodiment of the present utility model includes a cable terminal and a cable 10. The cable terminal is used to be arranged at the end of the cable 10 and is used to improve the electric field at the end of the cable 10.

[0039] The cable terminal includes a bushing 100, a stress cone 200, a base 300, and a sealing assembly 500.

[0040] The sleeve 100 has a hollow structure inside.

[0041] The stress cone 200 is disposed inside the sleeve 100. Specifically, the stress cone 200 is coaxially arranged with the sleeve 100. Of course, there may be a certain error in the coaxiality between the stress cone 200 and the sleeve 100.

[0042] Furthermore, the stress cone 200 is a hollow structure. Specifically, the stress cone 200 is provided with a first cable passing channel 201. The first cable passing channel 201 extends along the axial direction of the stress cone 200, and the first cable passing channel 201 is used for the cable 10 to pass through.

[0043] The base 300 includes a first connecting portion 310 and a second connecting portion 320 connected to the bottom end of the first connecting portion 310. The first connecting portion 310 is disposed inside the sleeve 100 and connected to the bottom of the stress cone 200. The first connecting portion 310 is provided with a second cable passing channel 311 communicating with the first cable passing channel 201. An oil storage gap 400 is formed between the outer side wall of the first connecting portion 310 and the inner side wall of the sleeve 100, and between the outer wall side of the stress cone 200 and the inner side wall of the sleeve 100. The second connecting portion 320 extends out from the bottom end of the sleeve 100 and is hermetically connected to the bottom end of the sleeve 100.

[0044] Specifically, the first connecting portion 310 is a cylindrical shape provided with the second cable passing channel 311, and the first connecting portion 310 is connected below the stress cone 200. The first connecting portion 310 is coaxially arranged with the stress cone 200, and the second cable passing channel 311 is communicated with the first cable passing channel 201. Among them, the second cable passing channel 311 is used for the cable 10 to pass through; the second connecting portion 320 is connected to the bottom end of the first connecting portion 310, and the second connecting portion 320 extends radially along the first connecting portion 310. The second connecting portion 320 seals the bottom end of the oil storage gap 400, and the second connecting portion 320 is connected to the bottom end of the sleeve 100.

[0045] It can be understood that the base 300 can support the stress cone 200, connect the stress cone 200 with the sleeve 100, and the base 300 also functions to seal the bottom end of the oil storage gap 400. Among them, the oil storage gap 400 is used to store the insulating oil 410.

[0046] The sealing assembly 500 is disposed inside the second cable passing channel 311.

[0047] It can be understood that the cable 10 can be successively passed through the second cable passing channel 311 and the first cable passing channel 201. If the insulating oil 410 in the oil storage gap 400 leaks, then the insulating oil 410 may enter the gap between the inner wall of the first connecting portion 310 and the outer wall of the cable 10 from the docking portion of the first connecting portion 310 and the stress cone 200. By arranging the sealing assembly 500 in the second cable passing channel 311, the sealing assembly 500 can seal the gap between the inner wall of the first connecting portion 310 and the outer wall of the cable 10, thereby achieving the purpose of sealing and preventing oil leakage.

[0048] As Figure 3 shown, in some embodiments, a supporting portion 312 is provided on the inner wall of the first connecting portion 310, and the sealing assembly 500 is supported by the supporting portion 312.

[0049] It can be understood that the supporting portion 312 is used to support and position the sealing assembly 500 to prevent the sealing assembly 500 from moving downward.

[0050] Specifically, the supporting portion 312 is integrally connected to the first connecting portion 310, and the supporting portion 312 is in a ring structure. The sealing assembly 500 is arranged on the supporting portion 312, and the sealing assembly 500 is also in a ring structure as a whole. The supporting portion 312 does not hinder the cable 10 from passing through the second cable passing channel 311 and extending into the first cable passing channel 201. The sealing assembly 500 is arranged to surround the cable 10 and seals the gap between the inner wall of the first connecting portion 310 and the outer wall of the cable 10.

[0051] Combined Figure 3 with Figure 4 , further, the sealing assembly 500 includes a first sealing ring 510 arranged on the supporting portion 312 and a pressing unit 520 pressing on the side of the first sealing ring 510 away from the supporting portion 312.

[0052] It can be understood that in the sealing assembly 500, the first sealing ring 510 mainly plays a sealing role. The supporting portion 312 is used to support the first sealing ring 510. The pressing unit 520 presses on the side of the first sealing ring 510 away from the supporting portion 312 and is used to position the first sealing ring 510 to prevent the first sealing ring 510 from moving axially.

[0053] It should be noted that the first sealing ring 510 is an elastic member. The outer edge of the lower end of the first sealing ring 510 has a first conical surface 511, and the outer edge of the upper end of the first sealing ring 510 has a second conical surface 512; further, the upper side surface of the supporting portion 312 has a third conical surface 3121, the third conical surface 3121 fits with the first conical surface 511, and the pressing unit 520 has a fourth conical surface 5211, and the fourth conical surface 5211 fits with the second conical surface 512.

[0054] It can be understood that under the extrusion of the pressing unit 520, the first sealing ring 510 will be compressed and protrude towards the cable 10. The greater the pressure applied by the pressing unit 520 to the first sealing ring 510, the tighter the cooperation between the first sealing ring 510 and the cable 10, and the better the sealing effect.

[0055] Specifically, the pressing unit 520 is threadedly connected to the first connecting portion 310, and the pressing unit 520 is operably movable along the axial direction of the first connecting portion 310.

[0056] It can be understood that the threaded connection between the pressing unit 520 and the first connecting portion 310 can fix the pressing unit 520 and the first connecting portion 310. In addition, by rotating the pressing unit 520, the pressure between the first sealing ring 510 and the cable 10 can be adjusted.

[0057] Specifically, the pressing unit 520 includes a pressing ring 521 pressing on one side of the first sealing ring 510 away from the supporting portion 312, and a tightening ring 522 pressing on the pressing ring 521. The tightening ring 522 is threadedly connected to the first connecting portion 310, and the tightening ring 522 is operably movable along the axial direction of the first connecting portion 310.

[0058] Specifically, the outer side wall of the tightening ring 522 has a threaded structure, and the inner side wall of the first connecting portion 310 has a threaded structure. The threaded structure on the tightening ring 522 is in threaded cooperation with the threaded structure on the first connecting portion 310.

[0059] Please refer to Figure 3 , in some embodiments, the bottom end of the stress cone 200 is sleeved outside the first connecting portion 310, and the bottom end of the stress cone 200 is in interference fit with the first connecting portion 310. In this way, on the one hand, the stress cone 200 and the first connecting portion 310 can be fastened, and the sealing performance of the docking portion between the bottom end of the stress cone 200 and the top end of the first connecting portion 310 can also be improved.

[0060] In some embodiments, a seal 600 is disposed in the oil storage gap 400. The seal 600 seals the connection between the first connecting portion 310 and the stress cone 200, and the seal 600 is spaced from the inner side wall of the sleeve 100.

[0061] It can be understood that the seal 600 is spaced from the inner side wall of the sleeve 100 and will not block the oil storage gap 400. The seal 600 can also improve the sealing performance of the docking portion between the bottom end of the stress cone 200 and the top end of the first connecting portion 310. Among them, the seal 600 can be a sealing tape wound around the docking portion between the bottom end of the stress cone 200 and the top end of the first connecting portion 310.

[0062] Please refer to Figure 1 and Figure 2, in some embodiments, a second sealing ring 700 is provided at the bottom end of the second connecting portion 320 and the sleeve 100. The second sealing ring 700 can prevent the insulating oil 410 in the oil storage gap 400 from leaking through the gap between the bottom end of the sleeve 100 and the second connecting portion 320 directly.

[0063] In the cable system of the present utility model, the cable 10 can sequentially pass through the second cable passing channel 311 and the first cable passing channel 201. If the insulating oil 410 in the oil storage gap 400 leaks, then the insulating oil 410 may enter the gap between the inner wall of the first connecting portion 310 and the outer wall of the cable 10 from the butt joint of the first connecting portion 310 and the stress cone 200. By arranging the sealing assembly 500 in the second cable passing channel 311, the sealing assembly 500 can seal the gap between the inner wall of the first connecting portion 310 and the outer wall of the cable 10, thereby achieving the purpose of sealing and preventing oil leakage.

[0064] In the description of this specification, the descriptions referring to the terms "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0065] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A cable terminal, characterized in that, Comprising: A sleeve; A stress cone disposed within the sleeve, the stress cone having a first cable passing channel; A base including a first connection portion and a second connection portion connected to the bottom end of the first connection portion, the first connection portion being disposed within the sleeve and connected to the bottom of the stress cone, the first connection portion having a second cable passing channel communicating with the first cable passing channel, an oil storage gap being formed between the outer sidewall of the first connection portion and the inner sidewall of the sleeve and between the outer wall side of the stress cone and the inner sidewall of the sleeve, and the second connection portion extending from the bottom end of the sleeve and being sealingly connected to the bottom end of the sleeve; A sealing assembly disposed within the second cable passing channel, the sealing assembly being configured to seal between the inner wall of the first connection portion and the outer wall of a cable passing through the second cable passing channel.

2. The cable terminal according to claim 1, characterized in that, The inner wall of the first connection portion is provided with a supporting portion, and the sealing assembly is supported by the supporting portion.

3. The cable terminal according to claim 2, characterized in that, The sealing assembly includes a first sealing ring disposed on the supporting portion and a pressing unit pressing on a side of the first sealing ring away from the supporting portion.

4. The cable terminal according to claim 3, characterized in that, The first sealing ring is an elastic member, the outer edge of the lower end of the first sealing ring having a first conical surface, and the outer edge of the upper end of the first sealing ring having a second conical surface; The upper side surface of the supporting portion has a third conical surface, the third conical surface fitting with the first conical surface, and the pressing unit having a fourth conical surface, the fourth conical surface fitting with the second conical surface.

5. The cable terminal according to claim 3, wherein, The pressing unit is threadedly connected to the first connection portion, and the pressing unit is operable to move axially along the first connection portion.

6. The cable terminal according to claim 3, characterized in that, The pressing unit includes a pressing ring pressing on a side of the first sealing ring away from the supporting portion and a tightening ring pressing on the pressing ring, the tightening ring being threadedly connected to the first connection portion, and the tightening ring being operable to move axially along the first connection portion.

7. The cable terminal according to claim 1, characterized in that, The bottom end of the stress cone is sleeved outside the first connection portion, and the bottom end of the stress cone is in interference fit with the first connection portion.

8. The cable terminal according to claim 1, characterized in that, A sealing member is disposed within the oil storage gap, the sealing member sealing the connection between the first connection portion and the stress cone, and the sealing member being spaced apart from the inner sidewall of the sleeve.

9. The cable terminal according to claim 1, characterized in that, A second sealing ring is provided between the second connection portion and the bottom end of the sleeve.

10. A cable system, characterized in that, Comprising: A cable terminal according to any one of claims 1 to 9 above; A cable, the cable passing through the first cable passing channel and the second cable passing channel, and the outer wall of the cable being sealingly engaged with the sealing assembly.

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