CN113572125A - GIS terminal mounting and positioning device and GIS terminal - Google Patents
GIS terminal mounting and positioning device and GIS terminal Download PDFInfo
- Publication number
- CN113572125A CN113572125A CN202110378523.XA CN202110378523A CN113572125A CN 113572125 A CN113572125 A CN 113572125A CN 202110378523 A CN202110378523 A CN 202110378523A CN 113572125 A CN113572125 A CN 113572125A
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- China
- Prior art keywords
- gis terminal
- cable
- positioning device
- conductor
- out rod
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/20—Cable fittings for cables filled with or surrounded by gas or oil
- H02G15/22—Cable terminations
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- Connector Housings Or Holding Contact Members (AREA)
Abstract
The invention discloses a GIS terminal installation positioning device and a GIS terminal, wherein the GIS terminal comprises a cable, an upper electrode and a sleeve, the upper electrode is provided with an inner hole, and the installation positioning device comprises: the conductor leading-out rod is a cylinder with a closed single end, and is sleeved and fixed on the cable conductor; the elastic plungers are arranged along the periphery of the conductor leading-out rod for at least one circle; the clamping groove is arranged on the inner periphery of the upper electrode for at least one circle; the conductor leading-out rod is used for being inserted into an inner hole of the upper electrode, so that the end part of the elastic plunger is clamped in the clamping groove, and the cable is installed and positioned. The invention can accurately position the cable in the sleeve, prevent the cable from separating and shifting, facilitate the installation and improve the construction efficiency.
Description
Technical Field
The invention relates to the technical field of gas insulated terminals, in particular to a GIS terminal mounting and positioning device and a GIS terminal.
Background
A Gas Insulated terminal (GIS terminal for short) is a cable terminal installed inside a Gas Insulated Switchgear (GIS) and using sulfur hexafluoride (SF6) Gas as an external insulation Gas insulation part. The high-voltage GIS terminal mainly comprises a high-voltage cable, an epoxy sleeve and an inner insulation structure, and is mainly divided into a conventional GIS terminal and a plug-in GIS terminal according to the installation mode.
The conventional GIS terminal is installed in a whole GIS cylinder body in a sealed manner after the whole terminal is installed on an installation site, so that the content of the GIS cylinder body is easily polluted, an epoxy sleeve needs to be integrally taken out during maintenance, and sulfur hexafluoride (SF6) gas is wasted.
The plug-in GIS terminal can realize that the epoxy sleeve and the GIS cylinder are sealed and installed firstly, and after the epoxy sleeve is installed, the GIS cylinder does not need to be opened at the installation site, so that the possibility of polluting the inside of a GIS is reduced. The cable section is then installed inside the epoxy sleeve. However, the plug-in type GIS terminal is installed in a blind-mate manner during construction, it is not easy to measure whether the cable is installed in place when the cable is installed, and the cable can only be measured and positioned by the mark of the cable exposed out of the epoxy sleeve, so that the axial positioning precision of cable installation is poor, and the cable and the epoxy sleeve can only depend on the cable hoop at the tail of the terminal to realize axial fixation in the axial direction, and the fixation is not reliable, and the cable conductor still has a sinking risk due to the influence of gravity.
Disclosure of Invention
In order to solve the above problems, the present invention provides a GIS terminal installation positioning device, wherein the GIS terminal comprises a cable, an upper electrode and a sleeve, the upper electrode is provided with an inner hole, and the installation positioning device comprises:
the conductor leading-out rod is a cylinder with a closed single end, and is sleeved and fixed on the cable conductor;
the elastic plungers are arranged along the periphery of the conductor leading-out rod for at least one circle;
the clamping groove is arranged on the inner periphery of the upper electrode for at least one circle;
the conductor leading-out rod is used for being inserted into an inner hole of the upper electrode, so that the end part of the elastic plunger is clamped in the clamping groove, and the cable is installed and positioned.
Optionally, the conductor leading-out rod is provided with at least one circle of plunger mounting holes arranged at intervals on the periphery thereof, the elastic plunger comprises a spring and a ball, and the spring and the ball are sequentially arranged in the plunger mounting holes.
Optionally, at least one ring of annular groove is further arranged on the periphery of the conductor leading-out rod, and a watchband contact finger is further mounted in the annular groove.
Optionally, the annular groove is provided between the resilient plunger and an end face of the conductor lead-out bar.
Optionally, the cross section of the slot passing through the axis is a right-angled rectangle, or a trapezoid with the upper bottom edge at the bottom of the slot.
Optionally, the sleeve is an epoxy sleeve.
Optionally, both the groove bottom and the notch of the card slot have rounded transitions.
The invention also provides a GIS terminal, which comprises a cable, an upper electrode, a sleeve and the GIS terminal mounting and positioning device.
The invention has the following technical effects:
(1) the cable conductor can be accurately positioned in the axial direction in the epoxy sleeve through the elastic plunger during installation;
(2) due to the matching of the elastic plunger and the clamping groove, the cable conductor can be prevented from being separated and displaced in the epoxy sleeve due to gravity;
(3) the structure is simple, the installation is convenient, and the construction efficiency is improved;
(4) the cable can be installed and dismantled fast.
(5) The dead weight of cables with different sections is different, and the spring force size and the number of the elastic plungers of different elastic plungers can be set.
Drawings
The above features and technical advantages of the present invention will become more apparent and readily appreciated from the following description of the embodiments thereof taken in conjunction with the accompanying drawings.
Fig. 1 is a schematic view showing a GIS terminal mounting and positioning device according to an embodiment of the present invention;
FIG. 2 is an enlarged view of FIG. 1 at A;
FIG. 3 is a schematic diagram of a rectangular card slot illustrating an embodiment of the present invention;
FIG. 4 is a schematic diagram of a trapezoidal card slot illustrating an embodiment of the present invention; .
Detailed Description
The embodiments of the present invention will be described below with reference to the accompanying drawings. Those of ordinary skill in the art will recognize that the described embodiments can be modified in various different ways, or combinations thereof, without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims. Furthermore, in the present description, the drawings are not to scale and like reference numerals refer to like parts.
As shown in fig. 1, in the present embodiment, the GIS terminal includes a cable 7, an upper electrode 1, and a sleeve 5, wherein the outer circumference of the cable 7 is sleeved with a rubber member 4, and the sleeve 5 may be an epoxy sleeve. Upper portion electrode 1 is equipped with hole 11, and GIS terminal installation positioner draws excellent 2, elasticity plunger 3 and the draw-in groove 12 of setting on upper portion electrode 1 hole including the conductor, and the conductor draws excellent 2 to be single-ended confined barrel, the conductor draws excellent 2 to establish from the tip cover of cable conductor 6 and fixes on cable conductor 6, can be fixed on cable conductor 6 through the mode of crimping.
The number of the elastic plungers 3 may be plural, fig. 2 is an enlarged view of a point a of fig. 1, and as shown in fig. 2, at least one circle of plunger mounting holes 21 are formed at intervals on the outer circumference of the conductor drawing rod 2, and the elastic plunger 3 is mounted in each plunger mounting hole 21. The end of the elastic plunger 3 can be elastically compressed or extended in the radial direction of the conductor draw-out bar 2. And in the uncompressed state, the end of the elastic plunger 3 protrudes from the wall surface of the conductor draw-out bar 2. At least one circle of clamping grooves 12 are formed in the inner periphery of the upper electrode 1, wherein when the conductor leading-out rod 2 is inserted into an inner hole 11 of the upper electrode 1, the end part of the elastic plunger 3 is compressed and contracted, and when the conductor leading-out rod 2 is inserted into the position of the elastic plunger 3 reaching the position of the clamping groove 12, the end part of the elastic plunger 3 enters the clamping grooves 12 and is clamped therein, so that the cable 7 is installed and positioned. The positions of the clamping groove 12 and the plunger mounting hole 21 are such that the position of the cable 7 is consistent with a preset mounting position after the cable 7 is mounted and positioned.
Wherein, the elastic plunger 3 comprises a spring 22 and a ball 23, and the spring 22 and the ball 23 are sequentially arranged in the plunger mounting hole 21.
Next, the cable installation process will be described, in which the upper electrode 1 is embedded inside the sleeve 5 as a part of the sleeve 5, and the sleeve 5 is inserted into the GIS sleeve and fixed. In the process that the cable conductor 6 is inserted into the sleeve 5, the elastic plunger 3 can be extruded by the inner wall of the upper electrode 1 to generate axial resistance, when the elastic plunger 3 is bounced into the clamping groove 12 of the upper electrode 1, the cable is installed in place, and the elastic plunger 3 is in a loose state in the clamping groove 12. The elasticity of the elastic plunger 3 can well overcome the dead weight of the cable conductor, and meanwhile, the long-term safe operation of the whole set of cable can be ensured by matching with a cable hoop at the tail part of the GIS terminal. If the axial withdrawal force applied during cable removal reaches a certain value, the cable conductor 6 can be withdrawn from the sleeve 5.
Further, at least one ring of annular groove 24 is further provided on the outer periphery of the conductor lead-out rod 2, as shown in fig. 1, the annular groove 24 is provided between the plunger mounting hole 21 and the end of the conductor lead-out rod 2, and a band contact finger is further mounted in the annular groove 24. The watchband contact finger is manufactured aiming at energy loss caused by heat generated by large current, and the multi-contact technology is adopted to reduce contact resistance and realize connection of the large current.
Further, as shown in table 1, the performance requirement of the connection between the conductor bar 2 of the plug-in type GIS terminal and the upper electrode 1 is shown.
TABLE 1
According to the connection requirement of the conductor leading-out rod 2 and the upper electric level 1, the electrifying performance requirement can be met through contact of a watchband contact finger, and the tensile performance requirement is realized through the cooperation of the elastic plunger 3 and the clamping groove 12 of the upper electric level 1. There are many options for the engaging groove 12 of the upper stage 1 to be engaged with the elastic plunger 3, and it is preferable that the engaging groove 12 is a right-angled rectangle in the section passing through the axis of the conductor drawing bar 2, or a trapezoid with its upper bottom at the bottom of the engaging groove in this embodiment.
Further, by comparing the two card slot 12 formats, the data of the insertion and extraction forces obtained by the test are shown in table 2. The magnitude of the elastic force of the elastic plunger 3 directly determines the magnitude of the insertion and extraction force, and the 2.75mm pressing amount is designed in table 2 as the pressing force required for the elastic plunger 3. In table 2, the calculation results of the insertion and extraction forces respectively corresponding to the different elastic plungers are selected from the calculation results shown in table 2 when the spring force of the elastic plunger 3 is 100N and 70N. According to the results of table 2, the rectangular card slot is preferable because the difference between the insertion and extraction forces is large.
Preferably, both the groove bottom and the notch of the clamping groove 12 have rounded transitions.
TABLE 2
By testing the pull-out force using different numbers of resilient plungers, a linear proportional relationship between the maximum load (insertion force, pull-out force) and the number of plungers can be obtained. The number of the elastic plungers can be calculated according to the following formula for cables with different conductor sections due to different dead weights.
F＝k*Q
F: the total load (insertion force, withdrawal force) of all the elastic plungers is N;
k: the load corresponding to each plunger piston is in N/piece;
q: number of plungers.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a GIS terminal installation positioner, the GIS terminal includes cable, upper portion electrode, sleeve pipe, and the upper portion electrode is equipped with the hole, its characterized in that, installation positioner includes:
the conductor leading-out rod is a cylinder with a closed single end, and is sleeved and fixed on the cable conductor;
the elastic plungers are arranged along the periphery of the conductor leading-out rod for at least one circle;
the clamping groove is arranged on the inner periphery of the upper electrode for at least one circle;
the conductor leading-out rod is used for being inserted into an inner hole of the upper electrode, so that the end part of the elastic plunger is clamped in the clamping groove, and the cable is installed and positioned.
2. The GIS terminal installation positioning device of claim 1, wherein the conductor leading-out rod is provided at its periphery with at least one circle of plunger installation holes arranged at intervals, the elastic plunger comprises a spring and a ball, and the spring and the ball are sequentially installed in the plunger installation holes.
3. The GIS terminal installation positioning device of claim 1,
the periphery of the conductor leading-out rod is also provided with at least one circle of annular groove, and a watchband contact finger is further installed in the annular groove.
4. The GIS terminal installation positioning device of claim 3,
the annular groove is arranged between the elastic plunger and the end face of the conductor leading-out rod.
5. The GIS terminal installation positioning device of claim 1,
the cross section of the clamping groove passing through the axis is a right-angle rectangle, or a trapezoid with the upper bottom edge at the bottom of the clamping groove.
6. The GIS terminal installation positioning device of claim 1,
the sleeve is an epoxy sleeve.
7. The GIS terminal mounting and positioning device of claim 1, wherein the slot bottom and the slot opening of the card slot have rounded transitions.
8. A GIS terminal comprising a cable, an upper electrode, a bushing, characterized in that it further comprises a GIS terminal mounting and positioning device as claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110378523.XA CN113572125A (en) | 2021-04-08 | 2021-04-08 | GIS terminal mounting and positioning device and GIS terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110378523.XA CN113572125A (en) | 2021-04-08 | 2021-04-08 | GIS terminal mounting and positioning device and GIS terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113572125A true CN113572125A (en) | 2021-10-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110378523.XA Pending CN113572125A (en) | 2021-04-08 | 2021-04-08 | GIS terminal mounting and positioning device and GIS terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113572125A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2788424Y (en) * | 2005-05-20 | 2006-06-14 | 正泰电气股份有限公司 | Watchband type contact finger connecting device |
| CN102231488A (en) * | 2011-04-21 | 2011-11-02 | 上海三原电缆附件有限公司 | High-voltage gas immersed termination mounting and positioning structure |
| JP2019193416A (en) * | 2018-04-24 | 2019-10-31 | 昭和電線ケーブルシステム株式会社 | Cable connection part |
-
2021
- 2021-04-08 CN CN202110378523.XA patent/CN113572125A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2788424Y (en) * | 2005-05-20 | 2006-06-14 | 正泰电气股份有限公司 | Watchband type contact finger connecting device |
| CN102231488A (en) * | 2011-04-21 | 2011-11-02 | 上海三原电缆附件有限公司 | High-voltage gas immersed termination mounting and positioning structure |
| JP2019193416A (en) * | 2018-04-24 | 2019-10-31 | 昭和電線ケーブルシステム株式会社 | Cable connection part |
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Application publication date: 20211029 |