Self-locking and unlocking device of plug-in GIS (Gas Insulated Switchgear) cable terminal

Abstract

The utility model discloses a self-locking and unlocking device for a plug-in GIS cable terminal, and the device comprises an epoxy sleeve upper insert which is internally provided with a cavity; the conducting rod is arranged in the cavity; the guide head is arranged at the top of the conducting rod and located in the cavity; the spring stop assembly is installed on the inner wall of the cavity, and the movable end of the spring stop assembly is matched with the guide head; and the unlocking assembly is mounted on the guide head, and the unlocking assembly is matched with the movable end of the spring stop assembly. Self-locking and unlocking of the plug-in GIS cable terminal are realized through arrangement and mutual cooperation of the guide head, the spring locking assembly and the unlocking assembly, and the problem that a cable slides down due to self weight is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of cable accessories, in particular to a self-locking and unlocking device for a plug-in type GIS cable terminal. Background Art

[0002] Gas Insulated Switchgear, or GIS for short, combines all the equipment in a substation except the transformer, including circuit breakers, disconnectors, grounding switches, voltage transformers, current transformers, lightning arresters, busbars, cable terminals, inlet and outlet bushings, etc., into a whole through optimized design.

[0003] In the prior art, GIS cable terminals have two structures: assembled and plug-in. The assembled structure can prevent the cable from sliding down due to its own weight, but there are problems such as sulfur hexafluoride gas leakage and inconvenient installation; the plug-in structure can prevent sulfur hexafluoride gas leakage and is easy to install, but there is a problem of the cable sliding down due to its own weight, which may cause failure of the cable terminal and cause certain losses to power users.

[0004] In order to avoid cable terminal failure and ensure the normal operation of power equipment, it is necessary to avoid sulfur hexafluoride gas leakage, facilitate installation, and prevent the cable from sliding down due to its own weight. Therefore, a device is needed to meet the above increasingly urgent requirements. Utility Model Content

[0005] In view of the defects in the prior art, the purpose of the utility model is to provide a self-locking and unlocking device for a pluggable GIS cable terminal. This device is used for self-locking and unlocking of the pluggable GIS cable terminal. On the basis of meeting the pluggable requirement, it solves the problem of the cable sliding down due to its own weight.

[0006] The utility model provides a self-locking and unlocking device for a pluggable GIS cable terminal, comprising:

[0007] An epoxy sleeve upper insert, wherein the epoxy sleeve upper insert has a cavity inside;

[0008] A conductive rod, wherein the conductive rod is disposed in the cavity;

[0009] A guide head, arranged on the top of the conductive rod and located in the cavity;

[0010] A spring stop assembly, the spring stop assembly is mounted on the inner wall of the cavity, and the movable end of the spring stop assembly cooperates with the guide head;

[0011] An unlocking assembly, mounted on the guide head, the unlocking assembly cooperates with the movable end of the spring stop assembly;

[0012] The guide head comprises:

[0013] A cylinder, one end of which is fixedly connected to the top of the conductive rod;

[0014] a semicircular portion connected to the other end of the cylinder;

[0015] The unlocking component comprises:

[0016] An upper unlocking ring, wherein the upper unlocking ring is sleeved on the cylinder;

[0017] A lower unlocking ring is sleeved on the cylinder and is located below the upper unlocking ring.

[0018] A top cross-sectional diameter of the lower unlocking ring is greater than a bottom cross-sectional diameter of the lower unlocking ring, and a top cross-sectional diameter of the lower unlocking ring is equal to a diameter of the semicircular portion.

[0019] It can be seen from the above technical scheme that the utility model provides a self-locking and unlocking device for a plug-in GIS cable terminal, which realizes the self-locking and unlocking of the plug-in GIS cable terminal through the setting and mutual cooperation of a guide head, a spring stop assembly, and an unlocking assembly, thereby solving the problem of the cable sliding down due to its own weight.

[0020] Furthermore, the end surface of the movable end of the spring stop assembly is an inclined surface.

[0021] Furthermore, the diameter of the cylinder is smaller than the diameter of the semicircular portion.

[0022] Furthermore, the semicircular portion is provided with a groove which cooperates with the upper unlocking ring.

[0023] Further, the top cross-sectional diameter of the upper unlocking ring is smaller than the bottom cross-sectional diameter of the upper unlocking ring, and the bottom cross-sectional diameter of the upper unlocking ring is smaller than the diameter of the semicircular portion.

[0024] Preferably, the upper unlocking ring and the lower unlocking ring are both trapezoidal rings.

[0025] Furthermore, there is a gap between the upper unlocking ring and the semicircular portion.

[0026] Furthermore, a mounting groove is provided inside the cavity;

[0027] The spring stop assembly comprises:

[0028] A stop pin, arranged inside the assembly groove;

[0029] A spring is sleeved on the stop pin.

[0030] Specifically, the stop pin is driven by the spring to complete the locking or unlocking of the conductive rod;

[0031] When the conductive rod is locked, the end of the stop pin is located below the semicircular portion;

[0032] When the conductive rod is unlocked, the end of the stop pin is located outside the semicircular portion.

[0033] By adopting the above technical solution, this application has the following technical effects:

[0034] 1. This application realizes the self-locking and unlocking of the plug-in GIS cable terminal by setting and cooperating with the guide head, the spring stop assembly, the upper unlocking ring and the lower unlocking ring, thereby solving the problem of the cable sliding down due to its own weight.

[0035] 2. This application has a simple structure, convenient operation and maintenance, and stable operating performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0037] Figure 1 A cross-sectional view of a self-locking and unlocking device of a pluggable GIS cable terminal provided in an embodiment of the utility model;

[0038] Figure 2 A schematic diagram of a guide head according to an embodiment of the present utility model;

[0039] Figure 3 Schematic diagram of a spring stop assembly according to an embodiment of the present utility model.

[0040] Reference numerals:

[0041] 1-conductive rod; 2-guide head; 3-spring stop assembly; 4-unlocking assembly; 5-epoxy sleeve upper insert;

[0042] 201 - semicircular portion; 202 - cylinder; 203 - groove; 301 - stop pin; 302 - spring; 401 - upper unlocking ring; 402 - lower unlocking ring; 501 - cavity; 502 - assembly groove. DETAILED DESCRIPTION

[0043] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0044] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.

[0045] In the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 understood as a limitation on the present invention.

[0046] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0047] like Figure 1-3 As shown, the embodiment of the present application discloses a self-locking and unlocking device for a pluggable GIS cable terminal, and the specific structure includes:

[0048] The epoxy sleeve upper insert 5 has a cavity 501 inside; the conductive rod 1 is arranged in the cavity 501; the guide head 2 is arranged on the top of the conductive rod 1 and is located in the cavity 501; the spring stop assembly 3 is installed on the inner wall of the cavity 501, and the movable end of the spring stop assembly 3 cooperates with the guide head 2; the unlocking assembly 4 is installed on the guide head 2, and the unlocking assembly 4 cooperates with the movable end of the spring stop assembly 3;

[0049] The guide head 2 includes: a cylinder 202, one end of which is fixedly connected to the top of the conductive rod 1; a semicircular portion 201, which is connected to the other end of the cylinder 202; the unlocking component 4 includes: an upper unlocking ring 401, which is sleeved on the cylinder 202; a lower unlocking ring 402, which is sleeved on the cylinder 202 and is located below the upper unlocking ring 401; the top cross-sectional diameter of the lower unlocking ring 402 is greater than the bottom cross-sectional diameter of the lower unlocking ring 402, and the top cross-sectional diameter of the lower unlocking ring 402 is equal to the diameter of the semicircular portion 201.

[0050] Specifically, the end surface of the movable end of the spring stop assembly 3 is an inclined surface.

[0051] Specifically, the diameter of the cylinder 202 is smaller than the diameter of the semicircular portion 201. The semicircular portion 201 is provided with a groove 203 that matches with the upper unlocking ring 401.

[0052] Specifically, the top cross-sectional diameter of the upper unlocking ring 401 is smaller than the bottom cross-sectional diameter of the upper unlocking ring 401 , and the bottom cross-sectional diameter of the upper unlocking ring 401 is smaller than the diameter of the semicircular portion 201 .

[0053] Specifically, the upper unlocking ring 401 and the lower unlocking ring 402 are both trapezoidal rings.

[0054] Specifically, there is a gap between the upper unlocking ring 401 and the semicircular portion 201 .

[0055] Specifically, an assembly groove 502 is formed inside the cavity 501 ; the spring stop assembly 3 includes: a stop pin 301 disposed inside the assembly groove 502 ; and a spring 302 sleeved on the stop pin 301 .

[0056] Specifically, the stop pin 301 is driven by the spring 302 to lock or unlock the conductive rod 1; when the conductive rod 1 is locked, the end of the stop pin 301 is located below the semicircular portion 201; when the conductive rod 1 is unlocked, the end of the stop pin 301 is located outside the semicircular portion 201.

[0057] The working principle of the self-locking and unlocking device of the pluggable GIS cable terminal of the embodiment of the present application is as follows: first, the cable is installed inside the assembly hole at the bottom end of the conductive rod 1;

[0058] Self-locking state: insert the conductive rod 1 into the cavity of the insert 5 on the epoxy sleeve so that the semicircular portion 201 of the guide head 2 contacts and compresses the stop pin 301, and the conductive rod 1 continues to penetrate. At this time, the pin head of the stop pin 301 extends out driven by the spring 302 and is stuck under the semicircular portion 201, forming a self-locking state.

[0059] Unlocked state: In the self-locking state, continue to insert the conductive rod 1, and the pin head of the stop pin 301 will slide over the upper unlocking ring 401 until it contacts the outer surface of the lower unlocking ring 402; pull the conductive rod 1 downward so that the upper unlocking ring 401 is stuck in the groove 203; continue to pull the conductive rod 1, and the pin head of the stop pin 301 will slide over the outer surfaces of the lower unlocking ring 402 and the semicircular part 201 in turn until the guide head 2 is completely withdrawn from the epoxy sleeve upper insert 5, and the unlocking is successful.

[0060] The self-locking and unlocking device of the pluggable GIS cable terminal in the embodiment of the present application has a simple structure, is easy to operate, and has stable performance. On the basis of being pluggable, it solves the problem of the cable sliding down due to its own weight.

[0061] In the specification of the present utility model, a lot of specific details are described. However, it is understood that the embodiments of the present utility model can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A self-locking and unlocking device for a pluggable GIS cable terminal, characterized in that: include: An epoxy sleeve upper insert (5), wherein the epoxy sleeve upper insert (5) has a cavity (501) inside; A conductive rod (1), the conductive rod (1) being arranged in the cavity (501); A guide head (2) is arranged on the top of the conductive rod (1) and is located in the cavity (501); A spring stop assembly (3), the spring stop assembly (3) being mounted on the inner wall of the cavity (501), and the movable end of the spring stop assembly (3) being matched with the guide head (2); An unlocking assembly (4) is mounted on the guide head (2), and the unlocking assembly (4) cooperates with the movable end of the spring stop assembly (3); The guide head (2) comprises: A cylinder (202), one end of which is fixedly connected to the top of the conductive rod (1); A semicircular portion (201) connected to the other end of the cylindrical body (202); The unlocking component (4) comprises: An upper unlocking ring (401), wherein the upper unlocking ring (401) is sleeved on the cylindrical body (202); A lower unlocking ring (402), wherein the lower unlocking ring (402) is sleeved on the cylindrical body (202) and is located below the upper unlocking ring (401); The top cross-sectional diameter of the lower unlocking ring (402) is greater than the bottom cross-sectional diameter of the lower unlocking ring (402), and the top cross-sectional diameter of the lower unlocking ring (402) is equal to the diameter of the semicircular portion (201).

2. The self-locking and unlocking device according to claim 1, characterized in that: The end surface of the movable end of the spring stop assembly (3) is an inclined surface.

3. The self-locking and unlocking device according to claim 1, characterized in that: The diameter of the cylinder (202) is smaller than the diameter of the semicircular portion (201).

4. The self-locking and unlocking device according to claim 1, characterized in that: The semicircular portion (201) is provided with a groove (203) that matches the upper unlocking ring (401).

5. The self-locking and unlocking device according to claim 1, characterized in that: The top cross-sectional diameter of the upper unlocking ring (401) is smaller than the bottom cross-sectional diameter of the upper unlocking ring (401), and the bottom cross-sectional diameter of the upper unlocking ring (401) is smaller than the diameter of the semicircular portion (201).

6. The self-locking and unlocking device according to claim 5, characterized in that: The upper unlocking ring (401) and the lower unlocking ring (402) are both trapezoidal rings.

7. The self-locking and unlocking device according to claim 1, characterized in that: There is a gap between the upper unlocking ring (401) and the semicircular portion (201).

8. The self-locking and unlocking device according to claim 1, characterized in that: The cavity (501) is provided with a mounting groove (502); The spring stop assembly (3) comprises: A stop pin (301) is arranged inside the assembly groove (502); The spring (302) is sleeved on the stop pin (301).

9. The self-locking and unlocking device according to claim 8, characterized in that: The stop pin (301) is driven by the spring (302) to complete locking or unlocking of the conductive rod (1); When the conductive rod (1) is locked, the end of the stop pin (301) is located below the semicircular portion (201); When the conductive rod (1) is unlocked, the end of the stop pin (301) is located outside the semicircular portion (201).

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