CN216562743U

CN216562743U - SF6 current transformer detects mouth and moves down device

Info

Publication number: CN216562743U
Application number: CN202122717012.4U
Authority: CN
Inventors: 陈雄; 蒋绍华; 沈映; 张微; 彭志豪; 李光涛; 杨顺; 宁媛媛; 张宇
Original assignee: Honghe Power Supply Bureau of Yunnan Power Grid Co Ltd
Current assignee: Honghe Power Supply Bureau of Yunnan Power Grid Co Ltd
Priority date: 2021-11-08
Filing date: 2021-11-08
Publication date: 2022-05-17
Anticipated expiration: 2031-11-08

Abstract

The utility model discloses a downward moving device for a detection port of an SF6 current transformer, which comprises a first conversion connector, a sealing pipeline, a second conversion connector, a three-way valve, a density relay, a fixed hoop and a signal line, wherein the detection port of the SF6 current transformer, the first conversion connector, the sealing pipeline, the second conversion connector, the three-way valve and the density relay are sequentially connected, the signal line is connected with the density relay and an SF6 current transformer secondary terminal interface, and the fixed hoop fixes the sealing pipeline and the signal line. The device moves the detection port of the SF6 current transformer downwards, realizes the detection of SF6 gas and the uninterrupted operation of SF6 low-pressure gas supply, and improves the stability of a power grid; the ground operation is realized, and the risks of high falling, induced electrical injury and electric shock are avoided; the pressure of the SF6 current transformer is recorded on the ground, the work of operators is greatly facilitated, and the operation and maintenance quality and efficiency of the equipment are improved.

Description

SF6 current transformer detects mouth and moves down device

Technical Field

The utility model relates to a device for downwards moving a detection port of an SF6 current transformer.

Background

The SF6 current transformer needs to periodically carry out pressure indication check to check whether SF6 gas leaks; periodically testing humidity and tapping products, and detecting whether overheating and discharging faults exist in the equipment; and for an SF6 current transformer with a leakage point, air supplement is needed.

Due to the design structure, the distance between a detection port and a charged part of the SF6 current transformer is short, and the work of humidity and tapping product testing and air supply cannot be carried out in a charged mode. The power failure of the equipment increases the risk of the power grid, is not beneficial to the stability of the power grid, and even causes large-area power failure under extreme conditions; statistics shows that the power-off operation time of the same work is 8-10 times that of live working, and the live working is necessary to replace the power-off operation.

The SF6 current transformer density relay cannot observe pressure on the ground due to poor installation angle, glass aging and the like, so that operation and maintenance are difficult.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a device for moving down the detection port of the SF6 current transformer, which moves down the detection port of the SF6 current transformer to a position convenient for working, thereby reducing the power failure time and improving the working efficiency.

The technical scheme of the utility model is as follows: SF (sulfur hexafluoride)₆The device comprises a first conversion connector, a sealed pipeline, a second conversion connector, a three-way valve, a density relay, a plurality of fixed hoops and signal lines, wherein the first conversion connector, the sealed pipeline, the second conversion connector, the three-way valve and the density relay are sequentially connected, the first conversion connector is arranged at the position of a current transformer detection port, the signal lines are connected with the density relay and secondary terminal interfaces and are connected with each other, and the signal lines are fixed on a current transformer support through the fixed hoops.

Furthermore, the SF6 current transformer detection port and the adapter are connected through threads, and the contact surface is sealed by a rubber pad and sealing silicone grease.

Furthermore, the sealing pipeline is divided into three layers, namely a copper pipe, a corrugated pipe and a rubber outer sleeve in sequence. The copper pipe has no leakage after being subjected to a tightness test; the corrugated pipe protects the copper pipe and avoids external force impact; the rubber jacket protects the copper pipe and the corrugated pipe and avoids rainwater corrosion.

Furthermore, a first channel of the three-way valve is connected with a second conversion joint, and a contact surface is sealed by a rubber pad and sealing silicone grease; the second channel of the three-way valve is connected with the density relay, and the contact surface is sealed by a rubber pad and sealing silicone grease; the three-way valve is internally provided with a check valve for SF6 gas detection and gas supplement, is externally connected with a dustproof cap, and comprises a knob type valve for controlling the opening and closing of the channel.

Furthermore, fixed staple bolt comprises two semicircles, semicircle both ends accessible screwed connection, and one of them semicircle configuration of the fixed staple bolt of well upper portion is used for the fixed hasp of fixed sealed pipeline and signal line, and one of them semicircle configuration fixed platform of bottom staple bolt passes through the screw fixation three-way valve, avoids three-way valve, sealed pipeline to receive external force to be destroyed.

Furthermore, the signal wire is divided into three layers, namely a copper wire, a corrugated pipe and a rubber outer sleeve, wherein the corrugated pipe protects the copper wire and avoids external force impact; the rubber jacket protects the copper pipe and the corrugated pipe and avoids rainwater corrosion.

The utility model has the beneficial effects that: the device moves the detection port of the SF6 current transformer downwards, realizes the detection of SF6 gas and the uninterrupted operation of SF6 low-pressure gas supply, and improves the stability of a power grid; the ground operation is realized, and the risks of high falling, induced electrical injury and electric shock are avoided; the pressure of the SF6 current transformer is recorded on the ground, the operation of operators is greatly facilitated, and the operation and maintenance quality and efficiency of the equipment are improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view (front view) of the present invention;

fig. 2 is a schematic view (top view) of the hoop structure of the present invention.

In the figure: 1-a current transformer detection port; 2-switching the first connector; 3-sealing pipeline, 4-adapter joint II, 5-three-way valve, 6-density relay, 7-fixing hoop, 8-signal line, 9-10-11-fixing bolt, 12-signal line and sealing pipeline fixing port.

Detailed Description

The utility model is explained in more detail below with reference to the figures and examples, without limiting the scope of the utility model.

Example 1: as shown in FIG. 1, a SF₆Current transformer detects mouthful device that moves down, including first change-over connection 2, sealed pipeline 3, two 4 change-over connections, three-way valve 5, density relay 6, a plurality of fixed staple bolts 7, signal line 8, first change-over connection 2, sealed pipeline 3, two 4 change-over connections, three-way valve 5, density relay 6 connect gradually, 1 department of current transformer detection mouth is arranged in to first change-over connection 2, 8 connection density relays 6 of signal line and secondary terminal interface (9) link to each other, 8 fix at current transformer pillar through fixed staple bolt 7 at signal line 8(10) The above. The density relay can send out an alarm signal when the air pressure of the equipment is lower than an alarm value; the density relay is provided with a rain cover to prevent rainwater corrosion. The distance between the first conversion joint and the second conversion joint is 1.5 mm. And setting the length of the sealing pipeline to be 3m according to the height of the current transformer framework. A first channel of the three-way valve 5 is connected with the second adapter 4, and the contact surface is sealed by a rubber pad and sealing silicone grease; the second channel of the three-way valve 5 is connected with a density relay 6, and the contact surface is sealed by a rubber pad and sealing silicone grease; a check valve is arranged in a third channel of the three-way valve 5, the three-way valve 5 comprises a knob type valve, the opening and closing of the gas circuit can be controlled by the rotatable valve, the control channel is opened and closed, and when the device works, the valve is in a normally open position. According to the name plate parameters of the current transformer, a matched density relay is selected, the alarm pressure value is 0.35MPa, the rated value is 0.4MPa, the other end of a three-way valve is connected with a gas detection port and used for detecting and supplementing sulfur hexafluoride, a valve is arranged on the three-way valve,

the density relay can send out an alarm signal when the air pressure of the equipment is lower than an alarm value, and the alarm signal is sent to the background through a signal wire. The density relay is provided with a rain cover to prevent rainwater corrosion.

The signal wires and the sealing pipeline are fixed on the framework through the hoop, and the hoop is shown in figure 2 and has the diameter of 42 cm.

SF6 current transformer detects mouth 1, crossover sub 2 and passes through threaded connection, and the contact surface chooses rubber pad, sealed silicone grease to seal for use.

The sealing pipeline 3 is divided into three layers, namely a copper pipe, a corrugated pipe and a rubber outer sleeve in sequence. The copper pipe has no leakage after being subjected to a tightness test; the corrugated pipe protects the copper pipe and avoids external force impact; the rubber jacket protects the copper pipe and the corrugated pipe and avoids rainwater corrosion.

The fixing hoop 7 is composed of two semicircles, two ends of each semicircle can be connected through screws, one semicircle of the middle-upper fixing hoop is provided with a fixing lock catch (12) for fixing the sealing pipeline 3 and the signal line 8, and one semicircle of the bottom hoop is provided with a fixing platform for fixing the three-way valve through screws, as shown in fig. 2.

The signal wire 8 is divided into three layers, namely a copper wire, a corrugated pipe and a rubber jacket in sequence. The corrugated pipe protects the copper wire and avoids external force impact; the rubber jacket protects the copper pipe and the corrugated pipe and avoids rainwater corrosion.

This device realizes detecting mouth and density relay and moves down from the eminence through installing one section sealed pipeline additional, has reduced sulfur hexafluoride and has detected, aerify and pressure monitoring's the operation degree of difficulty, has improved the operating efficiency. The joint surface of the component is sealed by adopting a sealing gasket and sealing silicone grease, so that the hidden danger of air leakage of the device is avoided. The rubber outer sleeve and the corrugated pipe are arranged on the outer surfaces of the sealed pipeline and the signal wire, so that external impact and rainwater corrosion are avoided, and the service life is prolonged. The sealing pipeline and the signal wire are fixed by the hoop, so that the stability of the device is enhanced.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a SF6 current transformer detects mouthful moves down device which characterized in that: the automatic density measurement device comprises a first conversion connector (2), a sealed pipeline (3), a second conversion connector (4), a three-way valve (5), a density relay (6), a plurality of fixed hoops (7), a signal line (8), the first conversion connector (2), the sealed pipeline (3), the second conversion connector (4), the three-way valve (5) and the density relay (6) are sequentially connected, the first conversion connector (2) is arranged at a current transformer detection port (1), the signal line (8) is connected with the density relay (6) and a secondary terminal interface (9) and is connected with the same, and the signal line (8) is fixed on a current transformer support (10) through the fixed hoops (7).

2. The SF6 current transformer detection port downshifting device of claim 1, wherein: the SF6 current transformer detection port (1) and the first adapter (2) are connected through threads, and the contact surface is sealed by a rubber pad and sealing silicone grease.

3. The SF6 current transformer detecting port downward shifting apparatus of claim 1, wherein the sealing pipeline (3) is divided into three layers, in turn copper tube, bellows, rubber casing.

4. The SF6 current transformer detection port downshifting device of claim 1, wherein: the first channel of the three-way valve (5) is connected with the second adapter (4), and the contact surface is sealed by rubber pads and sealing silicone grease; the second channel of the three-way valve (5) is connected with the density relay (6), and the contact surface is sealed by a rubber pad and sealing silicone grease; a check valve is arranged in a third channel of the three-way valve (5), the three-way valve (5) comprises a knob type valve, and the channel is controlled to be opened and closed.

5. The SF6 current transformer detection port downshifting device of claim 1, wherein: fixed staple bolt (7) comprise two semicircles, semicircle both ends accessible screwed connection, and one of them semicircle configuration of the fixed staple bolt of well upper portion is used for fixed hasp (12) of fixed sealed pipeline (3) and signal line (8), and one of them semicircle configuration fixed platform of bottom staple bolt passes through the screw fixation three-way valve.

6. The SF6 current transformer detection port downshifting device of claim 1, wherein: the signal wire (8) is divided into three layers, namely a copper wire, a corrugated pipe and a rubber jacket in sequence.