Pluggable GIS terminal

Abstract

The utility model discloses a plug-in GIS terminal, comprising an epoxy sleeve and a stress cone, the epoxy sleeve is internally provided with the stress cone, the plug-in GIS terminal also comprises a binding post and a tail pipe, the binding post is arranged at the top end of the stress cone, the tail pipe is connected with the epoxy sleeve, the inner wall of the tail pipe is provided with an annular chute, and the tail pipe is connected with the epoxy sleeve. A movable circular ring is slidably installed in the annular sliding groove, and the top end of the movable circular ring and the bottom end of the stress cone are connected through elastic pieces evenly arranged in the circumferential direction of the movable circular ring and the bottom end of the stress cone. The binding post is pushed to slide to the position where the binding post is connected with the conducting strip through the stress cone, so that the binding post is connected with the conducting strip, and when the stress cone is aged and elastically loosened after being used for a long time, stable elastic force is provided for the stress cone through the elastic piece; the occurrence of poor contact between the stress cone and the cable is reduced, and the elastic piece provides permanent radial force for the stress cone, so that the phenomenon that the stress cone is separated from the cable does not occur.

Description

TECHNICAL FIELD

[0001] The utility model relates to high voltage cable accessory technical field, and specifically is a plug -in GIS terminal. BACKGROUND

[0002] It is known that the plug-in GIS terminal is one kind of cable accessory, the plug-in GIS terminal is a pure dry structure, the cable core and the epoxy sleeve adopt a plug-in connection mode, and the cable GIS sleeve of the plug-in GIS terminal adopts plug-in connection, so that installation is more convenient. The plug-in GIS terminal is suitable for the connection of power cables and high-voltage transformers, has the characteristics of light weight, small size, compact structure, easy installation and maintenance, etc.

[0003] For example, the patent application with the publication number CN211291774U and the publication date of August 18, 2020, and the name "a temperature measuring type GIS inner cone plug-in terminal" discloses a temperature measuring type GIS inner cone plug-in terminal, which relates to the technical field of power equipment temperature measurement. It comprises a sleeve, a rubber insulation assembly, a temperature measuring assembly and a tail pipe system. The temperature measuring assembly comprises a contact conductor, a force ring, a temperature measuring ring and a contact finger installed on the contact conductor. The contact conductor is fixed on the cable core by a tightening screw, and the contact conductor is provided with an annular groove for installing the temperature measuring ring. The middle part of the force ring has an annular through hole for the cable core to pass through, and the force ring is made of non-metallic material for power signal transmission. The temperature measuring ring is provided with an intelligent temperature measuring module, so that the wireless signal passes through the force ring and is transmitted to the external receiving device. Through the implementation of the technical scheme, the technical problem of difficult monitoring of the temperature of the inner cone plug-in terminal can be effectively solved, the cable core of the inner cone plug-in terminal can be accurately monitored online, the structure connection is stable and reliable, the installation and operation are convenient, the maintenance cost is low, and it has good application prospect.

[0004] In the prior art, the epoxy sleeve of the plug-in GIS terminal is provided with a stress cone, and the stress cone is connected with the cable conductive layer. Because of the long service time, the stress cone is prone to aging and elastic relaxation, which affects the contact between the stress cone and the cable and affects the safe use of the plug-in GIS terminal. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a plug-in GIS terminal to solve the above problems in the prior art.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: a plug -in GIS terminal, including epoxy sleeve and stress cone, the stress cone is installed in the epoxy sleeve, still including binding post and tail pipe, the stress cone top end is installed with binding post, the tail pipe is connected with the epoxy sleeve, the tail pipe inner wall is equipped with annular slide groove, the annular slide groove is installed with a movable ring in sliding, the movable ring's top end and stress cone's bottom between through the elastic piece that sets up along its circumferential direction evenly is connected.

[0007] The bottom middle part of the tail pipe is provided with an expansion joint, the two ends of the expansion joint are connected to the upper part and the lower part of the tail pipe respectively, and the two ends of the expansion joint are sealingly connected with the tail pipe through flanges.

[0008] The bottom middle part of the tail pipe is provided with an expansion joint, the two ends of the expansion joint are connected to the upper part and the lower part of the tail pipe respectively, and the two ends of the expansion joint are sealingly connected with the tail pipe through flanges.

[0009] The bottom end of the stress cone is provided with a cone support, and the top end of the elastic piece is connected with the bottom end of the cone support.

[0010] The top end of the epoxy sleeve is provided with a contact, and the contact and the epoxy sleeve are of an integrated structure.

[0011] The contact is provided with a conductive sheet, and the conductive sheet is connected with the binding post.

[0012] The binding post and the stress cone are connected through a stop sleeve.

[0013] The outer wall of the tail pipe is provided with a grounding terminal.

[0014] The top end of the binding post is provided with a plug-in slot, and the inner wall of the contact is provided with a plug-in rod.

[0015] The top opening of the plug-in slot is larger than the bottom opening, the top opening of the plug-in slot is in the shape of a horn, the plug-in rod is made of an insulating material, the bottom end of the plug-in rod is in the shape of a circular table, and the circular table-shaped bottom end of the plug-in rod is matched with the top horn-shaped opening of the plug-in slot.

[0016] The utility model discloses the beneficial effect lies in: through stress cone and push the binding post to slide to the position that the binding post is connected with the conductive sheet, make the binding post with the conductive sheet be connected, when stress cone ages and the elastic relaxation occurs after long -time use, the stable elastic force is provided to stress cone through elastic piece, reduce the occurrence of the contact between stress cone and cable and the occurrence of the phenomenon that stress cone and cable are separated. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Fig. 1 This is a partial cross-sectional structural diagram of one embodiment of the present invention;

[0019] Fig. 2 This is a partial cross-sectional structural schematic diagram of another embodiment of the present invention.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Epoxy sleeve; 2. Stress cone; 3. Terminal; 4. Tail tube; 5. Annular groove; 6. Movable ring; 7. Elastic element; 8. Contact; 9. Conductive plate; 10. Stop sleeve; 11. Positioning ring; 12. Locking threaded rod; 13. Tapered support; 14. Insertion groove; 15. Insertion rod; 16. Expansion joint. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0023] like Figs. 1-2 As shown, in one embodiment of this utility model, a pluggable GIS terminal includes an epoxy sleeve 1 and a stress cone 2. The stress cone 2 is installed inside the epoxy sleeve 1. The terminal also includes a terminal block 3 and a tail tube 4. The terminal block 3 is installed at the top of the stress cone 2. The tail tube 4 is connected to the epoxy sleeve 1. An annular groove 5 is provided on the inner wall of the tail tube 4. A movable ring 6 is slidably installed in the annular groove 5. The top of the movable ring 6 and the bottom of the stress cone 2 are connected by elastic members 7 evenly arranged along its circumferential direction.

[0024] Specifically, the epoxy sleeve 1 is a device for one or more conductors to pass through the partition and play an insulating and supporting role. The epoxy sleeve 1 has good insulation performance, can prevent the cable from leaking or short-circuiting when passing through the wall, and ensures the safe operation of the equipment. The epoxy sleeve 1 can effectively protect the cable from mechanical damage, chemical corrosion, fire, etc., and prolong the service life of the cable. The stress cone 2 is a conical device used to increase the insulation shield diameter of the high-voltage cable to control the electric field intensity in the joint (i.e., the terminal post 3) within the specified design range. The terminal post 3 is a terminal for connecting the wire. The tail pipe 4 is a pipe for connecting and protecting the tail of the plug-in GIS terminal. The grounding terminal is installed on the outer wall of the tail pipe 4. The grounding terminal is connected to the grounding body. The grounding terminal is connected to the grounding wire. Through the grounding terminal, the grounding wire has good grounding conditions. The top of the epoxy sleeve 1 is provided with a contact 8, and the contact 8 and the epoxy sleeve 1 are of an integrated structure. The contact 8 is pre-cast in the epoxy sleeve 1. The plug-in full-sealing structure does not require a sealing ring, which solves the sealing problem at the top of the epoxy sleeve 1, making the maintenance of the epoxy sleeve 1 and the contact 8 more convenient. The contact 8 is provided with a conductive sheet 9 connected to the terminal post 3 for conducting work. The terminal post 3 and the stress cone 2 are connected through a stop sleeve 10. The stop sleeve can prevent the stress cone 2 and the terminal post 3 from being inserted too deeply into the epoxy sleeve 1, thereby causing damage to the epoxy sleeve 1. It also provides protection for the connection between the terminal post 3 and the conductive sheet 9. The stress cone 2 is inserted into the epoxy sleeve 1 by the staff, so that the terminal post 3 is connected to the conductive sheet 9, enabling power communication. The elastic element 7 on the movable ring 6 (the elastic element 7 is an element that can be stretched and reset, preferably a spring) provides a certain elastic force for the stress cone 2, so that the stress cone 2 does not slip out of the epoxy sleeve 1. When the stress cone 2 ages and the elasticity relaxes after a long period of use, the elastic force provided by the elastic element 7 to the stress cone 2 prevents the stress cone 2 from sliding down from the epoxy sleeve 1, causing the terminal post 3 and the conductive sheet 9 to disengage from each other, thereby causing circuit interruption or poor contact, and improving the stability of the connection between the conductive sheet 9 and the terminal post 3. In the prior art, the epoxy sleeve 1 of the plug-in GIS terminal is provided with a stress cone 2 connected to the conductive layer of the cable. Due to the long period of use, the stress cone 2 is prone to aging and relaxation, which affects the contact between the stress cone 2 and the cable, and affects the safe use of the plug-in GIS terminal.In the embodiment, the stress cone 2 pushes the terminal post 3 to slide to the position where the terminal post 3 is connected with the conductive sheet 9, so that the terminal post 3 is connected with the conductive sheet 9, when the stress cone 2 is aged and elastically relaxed after long time use, the elastic member 7 provides stable elastic force to the stress cone 2, reduces the occurrence of the poor contact between the stress cone 2 and the cable, and the elastic member 7 provides permanent radial force to the stress cone 2 (that is, the elastic member 7 always provides elastic force to the stress cone 2), and the phenomenon that the stress cone 2 is separated from the cable does not occur.

[0025] In another embodiment of the utility model, the bottom end of the tail pipe 4 is provided with an expansion joint 16, the two ends of the expansion joint 16 are connected to the upper part and the lower part of the tail pipe 4 respectively, and the two ends of the expansion joint 16 are sealingly connected to the tail pipe 4 through flanges. Specifically, the first expansion joint 16 is made of metal material and has certain bending and axial expansion capabilities. In the prior art, the smooth aluminum sheath has a compact structure, and the aluminum sheath is in close contact with the semi-conductive buffer water-blocking belt in the inner layer without any gap, thereby reducing the risk of floating discharge caused by poor contact due to the gap. Therefore, the tail pipe 4 is protected by the smooth aluminum sheath. However, the smooth aluminum sheath has relatively poor bending performance, and the tail pipe 4 and the epoxy sleeve 1 often experience thermal expansion and contraction during use, which causes the welding points between the smooth aluminum sheath and the epoxy sleeve 1 to be easily damaged. In the embodiment, the expansion joint 16 is welded to the bottom end of the tail pipe 4, so that the tail pipe 4 has certain expansion capabilities. When the epoxy sleeve 1 experiences thermal expansion and contraction, the axial force generated on the epoxy sleeve 1 acts on the expansion joint 16, which buffers the axial force generated on the epoxy sleeve 1 through the expansion of the expansion joint 16, thereby protecting the epoxy sleeve 1 to a certain extent. In addition, the expansion joint 16 can relieve the stress of the lead seal part of the smooth aluminum sheath during thermal expansion and contraction.

[0026] In another embodiment of the utility model, a positioning ring 11 is mounted on the inner wall of the tail pipe 4 at the bottom end of the annular chute 5, two locking threaded rods 12 are symmetrically mounted on the positioning ring 11, and the top ends of the two locking threaded rods 12 are rotatably mounted at the bottom end of the movable ring 6. A cone support 13 is mounted at the bottom end of the stress cone 2, and the top end of the elastic member 7 is connected to the bottom end of the cone support 13.

[0027] Specifically, when the stress cone 2 is aged and elastically relaxed after being used for a long time, the stress cone 2 slides downward in the epoxy sleeve 1, so that the stress cone 2 drives the terminal post 3 to be separated from the conductive sheet 9, and then the circuit is disconnected or the contact is poor, at this time, the staff synchronously twists the two locking threaded rods 12, and since the top ends of the two locking threaded rods 12 are movably connected with the movable annular ring 6, the two locking threaded rods 12 synchronously drive the movable annular ring 6 to slide toward the top end of the annular sliding groove 5, so that the movable annular ring 6 extrudes the elastic member 7, the elastic member 7 generates an extrusion force acting on the bottom end of the cone holder 13, so that the cone holder 13 slides toward the top end of the tail pipe 4, the cone holder 13 drives the stress cone 2 to slide toward the top end of the epoxy sleeve 1, so that the stress cone 2 drives the terminal post 3 to be more stably connected with the conductive sheet 9, and the influence of the stress cone 2 on the connection between the terminal post 3 and the conductive sheet 9 after the stress cone 2 is aged and elastically relaxed can be effectively prevented.

[0028] In another embodiment of the utility model, the terminal post 3 is provided with a plug groove 14 at the top end, and the plug rod 15 is installed on the inner wall of the contact 8, the top opening of the plug groove 14 is larger than the bottom opening, the top opening of the plug groove 14 is trumpet-shaped, the plug rod 15 is made of insulating material, the bottom end of the plug rod 15 is in the shape of a circular truncated cone, and the circular truncated cone-shaped bottom end of the plug rod 15 is plugged into the trumpet-shaped top opening of the plug groove 14.

[0029] Specifically, when the staff drives the stress cone 2 to connect the terminal post 3 with the conductive sheet 9, the terminal post 3 may be unstable due to bending, but in this embodiment, during the connection of the terminal post 3 with the conductive sheet 9, the circular truncated cone-shaped bottom end of the plug rod 15 is inserted into the trumpet-shaped plug groove 14 on the terminal post 3, so that the plug rod 15 is plugged into the plug groove 14, which can effectively prevent the terminal post 3 from being unstable due to bending, and the whole terminal is a full dry structure, without any insulating agent, and the stress cone 2 will not be aged due to soaking in the insulating agent, thus prolonging the service life of the stress cone 2.

[0030] The above only describes certain exemplary embodiments of the utility model in a descriptive manner, without doubt, for ordinary skilled in the art, the described embodiments can be modified in various ways without deviating from the spirit and scope of the utility model. Therefore, the above drawings and description are illustrative in nature and should not be understood as limiting the scope of protection of the utility model claims.

Claims

1. A plug-in GIS terminal comprising an epoxy bushing and a stress cone, the stress cone being mounted within the epoxy bushing, characterized in that: The stress cone top end is provided with a terminal post, the tail pipe is connected with the epoxy sleeve, an annular sliding groove is formed on the inner wall of the tail pipe, and a movable ring is slidingly installed in the annular sliding groove. The stress cone bottom end is provided with a cone support, the top end of the elastic member is connected with the bottom end of the cone support, and the epoxy sleeve top end is provided with a contact head. The contact head is provided with a conductive sheet, and the conductive sheet is connected with the terminal post.

2. A plug-in GIS terminal according to claim 1, characterized in that The bottom end of the tail pipe is provided with an expansion joint, the two ends of the expansion joint are connected with the upper part and the lower part of the tail pipe, and the two ends of the expansion joint are sealingly connected with the tail pipe through flanges.

3. A plug-in GIS terminal according to claim 1, characterized in that An annular sliding groove is formed on the inner wall of the tail pipe, and a positioning ring is installed at the bottom end of the annular sliding groove.

4. The plug-in GIS terminal according to claim 1, wherein The terminal post and the stress cone are connected through a stop sleeve.

5. The plug-in GIS terminal according to claim 1, wherein The tail pipe outer wall is provided with a grounding terminal.

6. A plug-in GIS terminal according to claim 1, characterized in that The terminal post top end is provided with a plug-in groove, and the contact head inner wall is provided with a plug-in rod.

7. A plug-in GIS terminal according to claim 6, characterized in that The top opening of the plug-in groove is larger than the bottom opening, the top opening of the plug-in groove is in a horn shape, the plug-in rod is made of an insulating material, the bottom end of the plug-in rod is in a circular table shape, and the circular table shape of the bottom end of the plug-in rod is matched with the top horn-shaped opening of the plug-in groove.

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