阅读说明：本技术 一种干式插拔型gis终端 (Dry-type plug-in type GIS terminal ) 是由 王刚 孙国玉 王志明 于 2019-12-19 设计创作，主要内容包括：本发明涉及交联聚乙烯绝缘电力电缆附件技术领域,且公开了一种干式插拔型GIS终端,包括触头、触子、导体出线杆、环氧树脂套管、应力锥、应力锥托和尾管,所述环氧树脂套管的内部安装有所述触头,所述触头的顶端伸出所述环氧树脂套管内部,所述触头内通过定位装置安装有所述导体出线杆；触头和环氧树脂套管为一体式,无需O形密封圈,不会造成六氟化硫气体泄漏,导体出线杆通过电缆的线芯相匹配的插入孔与电缆的线芯以压接的方式相连接,触头的轴心处设有供导体出线杆通过的插入孔,且插入孔与导体出线杆相匹配,导体出线杆上的定位杆围绕导体出线杆的轴心旋转90°与触头的卡槽相配合,结构简单,安装方便。(The invention relates to the technical field of crosslinked polyethylene insulated power cable accessories and discloses a dry plug-pull type GIS terminal which comprises a contact, a conductor wire outlet rod, an epoxy resin sleeve, a stress cone support and a tail pipe, wherein the contact is arranged in the epoxy resin sleeve, the top end of the contact extends out of the interior of the epoxy resin sleeve, and the conductor wire outlet rod is arranged in the contact through a positioning device; the contact and the epoxy resin sleeve are integrated, an O-shaped sealing ring is not needed, sulfur hexafluoride gas leakage cannot be caused, the conductor wire outgoing rod is connected with a wire core of the cable in a compression joint mode through a wire core matched insertion hole of the cable, an insertion hole for the conductor wire outgoing rod to pass through is formed in the axis of the contact, the insertion hole is matched with the conductor wire outgoing rod, a positioning rod on the conductor wire outgoing rod rotates by 90 degrees around the axis of the conductor wire outgoing rod and is matched with a clamping groove of the contact, the structure is simple, and the installation is convenient.)

1. The utility model provides a dry-type plug-in type GIS terminal, includes contact (1), contact (2), conductor outlet pole (5), epoxy sleeve pipe (6), stress awl (7), stress awl hold in the palm (8) and tail pipe (9), the internally mounted of epoxy sleeve pipe (6) has contact (1), the top of contact (1) stretches out inside epoxy sleeve pipe (6), install through positioner in contact (1) conductor outlet pole (5), the lateral wall fixedly connected with of conductor outlet pole (5) contact (2), the rear end of conductor outlet pole (5) is equipped with the patchhole, conductor outlet pole (5) are through patchhole and sinle silk outlet looks crimp, the bottom fixedly connected with of conductor pole (5) stress awl (7), the lateral wall cover of stress awl (7) is equipped with cable insulation (12), the lateral wall of stress awl (7) is close to the below cover and is equipped with stress awl holds in the palm (8), stress awl hold in the palm (8) with stress awl (7) semiconduction part's lateral wall in close contact with, epoxy sleeve pipe (6) cover in stress awl (7) with stress awl holds in the palm (8) outside, just the surface of epoxy sleeve pipe (6) with stress awl (7) insulation part's surface in close contact with, the bottom fixedly connected with of epoxy sleeve pipe (6) tail pipe (9), its characterized in that: the contact (1) is an integrated contact (1) which is tightly connected with the epoxy resin sleeve (6).

2. A dry-pluggable GIS terminal according to claim 1, wherein: the conductor outgoing line rod (5) is positioned by the following means: the outer edge of the conductor wire outlet rod (5) is transversely provided with a positioning rod (10), and a clamping groove matched with the positioning rod (10) is arranged in the contact (1).

3. A dry-pluggable GIS terminal according to claim 1, wherein: tail pipe (9) with stress cone holds in the palm (8) and be equipped with closing device between epoxy sleeve pipe (6), closing device includes dead lever (16), guide arm (13), spring (14) and flange dish (15), a plurality of guide arm (13) are fixed stress cone holds in the palm (8) bottom surface and along circumferencial direction evenly distributed, spring (14) cover is established every in guide arm (13), the one end fixedly connected with of spring (14) flange dish (15), the other end fixedly connected with of spring (14) stress cone holds in the palm (8), the one end of dead lever (16) with epoxy sleeve pipe (6) are connected, the other end of dead lever (16) passes flange dish (15) link to each other with the nut.

Technical Field

The invention relates to the technical field of crosslinked polyethylene insulated power cable accessories, in particular to a plug-pull type cable terminal connecting device used for connecting a crosslinked cable and a Gas Insulated Switchgear (GIS), and particularly relates to a dry plug-pull type GIS terminal.

Background

The gas insulated switchgear GIS has the advantages of small occupied space, totally-enclosed bus without being influenced by external weather environment, strong safety, small maintenance workload and the like, so that the GIS is more and more favored by power system users, and meanwhile, a GIS cable terminal for connecting a crosslinked cable and the gas insulated switchgear GIS is correspondingly and rapidly developed.

At present, for a crosslinked polyethylene insulated GIS cable terminal with more than 66kV, the structure of the product which is most widely applied at home and abroad is shown in figure 1: the high-voltage switch comprises a contact 1, a contact 2, an O-shaped sealing ring 4, a conductor outlet rod 5, an epoxy resin sleeve 6, a stress cone 7, a stress cone support 8, a tail pipe 9 and the like. The contact 1 and the epoxy resin sleeve 6 are sealed by an O-shaped sealing ring 4, so that sulfur hexafluoride gas in the gas insulated switchgear GIS cannot leak. The conductor outgoing line rod 5 is fixed in the contact 1 by the positioning ring 3, so that the conductor outgoing line rod 5 cannot withdraw from the contact 1, and the electrical connection performance of the contact 1, the contact 2 and the conductor outgoing line rod 5 is ensured.

The GIS terminal with the structure has enough electrical strength, no oil and pollution and light weight, but has the following defects in the use process: the contact seat and the epoxy sleeve are sealed by the O-shaped ring, and after a period of time, the temperature of the conductive core can reach more than 80 ℃ in a power-on state, so that the aging speed of the O-shaped sealing ring is accelerated, the sealing performance is easily reduced, even sulfur hexafluoride gas leakage is caused, and the normal operation of electrical equipment is seriously threatened.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a dry-type plug-pull GIS terminal, which solves the problems that the temperature of a guide core can reach more than 80 ℃ in a power-on state, the aging speed of an O-shaped sealing ring is accelerated, the sealing performance is easily reduced, and even sulfur hexafluoride gas leakage is caused.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a dry-type plug-in type GIS terminal, includes contact, contactor, conductor wire outgoing pole, epoxy sleeve pipe, stress cone support and tail pipe, epoxy sheathed tube internally mounted have the contact, the top of contact stretches out inside the epoxy sleeve pipe, install through positioner in the contact the conductor wire outgoing pole, the lateral wall fixedly connected with of conductor wire outgoing pole the contactor, the rear end of conductor wire outgoing pole is equipped with the patchhole, the conductor wire outgoing pole passes through the patchhole and is connected with sinle silk looks pressure, the bottom fixedly connected with of conductor wire outgoing pole the stress cone, the lateral wall cover of stress cone is equipped with cable insulation, the lateral wall of stress cone is close to the below cover and is equipped with the stress cone support, the stress cone support with the lateral wall in close contact with of stress cone semi-conductive part, the epoxy sleeve pipe cover in the stress cone with the stress cone holds in the palm the outside, the outer surface of the epoxy resin sleeve is in close contact with the outer surface of the stress cone insulating part, the tail pipe is fixedly connected to the bottom end of the epoxy resin sleeve, and the contact is an integrated contact which is in close connection with the epoxy resin sleeve.

Preferably, the conductor outlet rod positioning device is: and a positioning rod is transversely arranged on the outer edge of the conductor wire outlet rod, and a clamping groove matched with the positioning rod is arranged in the contact.

Preferably, a pressing device is arranged between the tail pipe and the stress cone support and between the tail pipe and the epoxy resin sleeve, the pressing device comprises a fixing rod, guide rods, springs and flange plates, the guide rods are fixed on the bottom surface of the stress cone support and are uniformly distributed along the circumferential direction, the springs are sleeved in the guide rods, one end of each spring is fixedly connected with the flange plate, the other end of each spring is fixedly connected with the stress cone support, one end of each fixing rod is connected with the epoxy resin sleeve, and the other end of each fixing rod penetrates through the flange plate to be connected with the corresponding nut.

(III) advantageous effects

The invention provides a dry-type plug-in GIS terminal, which has the following beneficial effects:

the contact and the epoxy resin sleeve are manufactured into a whole, the mounting steps are reduced, the mounting process is simplified, the maintenance workload is reduced, sulfur hexafluoride gas leakage caused by aging of an O-shaped sealing ring after the dry GIS terminal is used for several years is avoided, the electrical performance is reduced, the environment is polluted, in addition, a clamping groove is formed in the inner wall of the contact, a positioning rod of a conductor wire outgoing rod is clamped in the clamping groove, a cable core connected with the conductor wire outgoing rod is not prone to being separated from the contact, in addition, the pressing device can increase the pressure of the stress cone, and the contact reliability of the stress cone and the cone sleeve is improved.

Drawings

Fig. 1 is a schematic view of the overall structure of a conventional dry type GIS cable terminal according to the present invention;

fig. 2 is a schematic view of the overall structure of the present invention.

In the figure: 1. a contact; 2. a touch; 3. a positioning ring; 4. an O-shaped sealing ring; 5. a conductor outlet rod; 6. an epoxy resin bushing; 7. a stress cone; 8. a stress cone support; 9. a tail pipe; 10. positioning a rod; 11. a cable guide core; 12. insulating the cable; 13. a guide bar; 14. a spring; 15. a flange plate; 16. and (5) fixing the rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-2, the present invention provides a technical solution: a dry-type plug-pull GIS terminal comprises a contact 1, a contact 2, a conductor outgoing line rod 5, an epoxy resin sleeve 6, a stress cone 7, a stress cone support 8 and a tail pipe 9, wherein the contact 1 is installed inside the epoxy resin sleeve 6, the top end of the contact 1 extends out of the epoxy resin sleeve 6, the conductor outgoing line rod 5 is installed inside the contact 1 through a positioning device, the outer side wall of the conductor outgoing line rod 5 is fixedly connected with the contact 2, the rear end of the conductor outgoing line rod 5 is provided with an insertion hole, the conductor outgoing line rod 5 is in compression joint with a wire core through the insertion hole, the bottom end of the conductor outgoing line rod 5 is fixedly connected with the stress cone 7, the outer side wall of the stress cone 7 is sleeved with a cable insulator 12, the stress cone support 8 is sleeved on the outer side wall of the stress cone 7 close to the lower side, the stress cone support 8 is in tight contact with the outer side wall of the semi, the outer surface of the epoxy resin sleeve 6 is tightly contacted with the outer surface of the insulating part of the stress cone 7, so that the inner insulation and the outer insulation are reliably transited, and the electrical strength of a product is ensured, a cable guide core 11 on a cable is connected with a conductor outgoing line rod 5 in a compression joint mode to conduct electric energy, the stress cone support 8 is in a horn-shaped sleeve which can be sleeved on the stress cone 7, in order to improve the contact pressure of the stress cone support 8 and the stress cone 7 and simultaneously leave movable allowance for the stress cone support 8 in contact, a compressing mechanism is arranged at the bottom of the stress cone support 8, a tail pipe 9 is fixedly connected at the bottom end of the epoxy resin sleeve 6, the contact 1 is an integrated contact 1 which is tightly connected with the epoxy resin sleeve 6, a sealing ring is not needed between the contact 1 and the epoxy resin sleeve 6, and only the stress cone 7 is sleeved on the cable insulation 12 during, and then the stress cone support 8, the pressing mechanism and the tail pipe 9 are installed to finish the installation of the terminal, the stress cone 7 is sleeved on the cable insulation 12 to form a certain pressure, the stress cone 7 consists of an insulation part and a semi-conductive part, and the stress cone support 8 is matched with the stress cone 7 and is tightly contacted with the semi-conductive part of the stress cone 7.

Further, the positioning device of the conductor outgoing rod 5 is: the outer edge of the conductor wire outlet rod 5 is transversely provided with a positioning rod 10, a clamping groove matched with the positioning rod 10 is arranged in the contact 1, in order to prevent the conductor wire outlet rod 5 from falling out of the contact 1, the contact 1 is internally provided with the clamping groove, the conductor wire outlet rod 5 is provided with a positioning rod 10, a cable guide core 11 is inserted into the conductor wire outlet rod 5 and then is pressed, the axis of the contact 1 is provided with an insertion hole for the conductor wire outlet rod 5 to pass through, the conductor wire outlet rod 5 is inserted into the specified position of the contact 1 and then is rotated for 90 degrees, the positioning rod 10 is screwed into the clamping groove, and the conductor wire outlet rod 5 cannot fall off from the contact.

Furthermore, a pressing device is arranged between the tail pipe 9 and the stress cone support 8 and between the tail pipe and the epoxy resin sleeve 6, the pressing device comprises a fixing rod 16, guide rods 13, springs 14 and a flange plate 15, the guide rods 13 are fixed on the bottom surface of the stress cone support 8 and are uniformly distributed along the circumferential direction, the springs 14 are sleeved in each guide rod 13, one end of each spring 14 is fixedly connected with the flange plate 15, the other end of each spring 14 is fixedly connected with the stress cone support 8, one end of each fixing rod 16 is connected with the epoxy resin sleeve 6, the other end of each fixing rod 16 penetrates through the flange plate 15 to be connected with a nut, ten guide rods 13 are fixedly connected with the stress cone supports 8, ten springs 14 are sleeved in one guide rod 13, and the effect of increasing the pressure.

In conclusion, the working process of the invention is as follows: the contact 1 and the epoxy resin sleeve 6 are manufactured into a whole, a sealing ring is not needed between the contact 1 and the epoxy resin sleeve 6, when the terminal is installed, only a stress cone 7 is sleeved on a cable insulation 12, then a stress cone support 8, a pressing mechanism and a tail pipe 9 are installed, the terminal can be installed, however, in order to prevent a conductor outgoing line rod 5 from falling out of the contact 1, a clamping groove is arranged in the contact 1, a positioning rod 10 is installed on the conductor outgoing line rod 5, a cable guide core 11 is inserted into the conductor outgoing line rod 5 and then is in compression joint, an insertion hole for the conductor outgoing line rod 5 to pass through is arranged at the axis of the contact 1, after the conductor outgoing line rod 5 is inserted into a specified position of the contact 1 and then is rotated by 90 degrees, the positioning rod 10 is screwed into the clamping groove, and the.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.