CN104076000B - A kind of oil-immersed and high-voltage sleeve pipe positioning indicator that makes moist - Google Patents

Abstract

The invention relates to an oil-immersed high-voltage bushing damp state indicator, which is characterized in that it includes an interface piece, one end of the interface piece is provided with a groove, and the outer wall of the other end of the interface piece is provided with a The thread connected to the oil-immersed high-voltage casing oil conservator, the middle part of the groove is provided with a through hole leading to the other end of the interface piece, the color changing mechanism is connected in the groove, and the color changing mechanism includes a colorless Transparent tube, both ends of the transparent tube are provided with sealing plates, the transparent tube is placed with color-changing silica gel, and the sealing plate is provided with several through holes with apertures smaller than the outer diameter of the color-changing silica gel. There is a protective cover, and several observation holes for observing the color-changing silica gel are evenly distributed on the protective cover. The device can effectively and reliably indicate the damp state of the oil-immersed high-voltage bushing in real time, and does not need power-off treatment.

Description

An oil-immersed high-voltage bushing damp state indicator

technical field

The invention relates to an oil-immersed high-voltage bushing damp state indicator.

Background technique

Oil-immersed high-voltage bushing is one of the most critical components of power transformers. After the bushing is damp, under the long-term action of the high voltage of the power grid, it is prone to insulation breakdown, and even a bushing explosion accident, resulting in damage to the power transformer and affecting Grid security. In recent years, due to problems such as sealing structure design, lead wire installation, and material aging of high-voltage bushings, the phenomenon of seal failure and bushing damp has occurred from time to time. If problems are found in time and measures are taken at the initial stage of bushing damp, accidents can be well avoided. happened. At present, the method of measuring the dielectric loss and capacitance of the casing damp is mainly used to indirectly check the damp condition of the bushing. This method has problems such as power failure and long detection period, and it is difficult to effectively detect the damp defect of the bushing in real time. Therefore, how to monitor and indicate the damp state of the bushing insulation in real time and conveniently, find the damp defect of the bushing as soon as possible, and eliminate the problem in the bud It is of great significance to avoid further expansion of defects or accidents.

Contents of the invention

The present invention makes improvements to the problems existing in the above-mentioned prior art, that is, the technical problem to be solved by the present invention is to provide an oil-immersed high-voltage bushing moisture status indicator, which can effectively and reliably indicate the oil-immersed high-voltage bushing in real time. The tube is in a damp state, and does not need power-off treatment.

In order to solve the above technical problems, the technical solution of the present invention is: an oil-immersed high-voltage bushing damp state indicator, including an interface piece, one end of the interface piece is provided with a groove, and the outer side of the other end of the interface piece The wall is provided with a screw thread for connecting with the oil-immersed high-voltage bushing oil conservator, the middle part of the groove is provided with a through hole leading to the other end of the interface piece, and the color changing mechanism is connected in the groove. The discoloration mechanism includes a colorless transparent tube, both ends of the transparent tube are provided with sealing plates, the transparent tube is placed with color-changing silica gel, and the sealing plate is provided with several through holes with diameters smaller than the outer diameter of the color-changing silica gel , the transparent tube is provided with a protective sleeve, and several observation holes for observing the discoloration silica gel are evenly distributed on the protective sleeve, and one end of the protective sleeve is threadedly connected to the side wall of the grooved end of the interface piece. The other end of the protective cover is provided with a cover plate with a pit, and the other end of the color-changing mechanism abuts against the pit of the cover plate.

Further, annular sealing rings are provided on the side walls of both ends of the transparent tube that are in contact with the groove and the pit respectively.

Further, the side wall of the interface is provided with a pumping and charging hole communicating with the through hole. The diameter of the pumping and charging hole increases sequentially from inside to outside, and its inner wall forms a first annular step surface and a second annular step from inside to outside. On the annular step surface, the pumping and charging hole is sequentially provided with a spring, a top ball, an O-shaped sealing ring, a pressure block with an air hole in the middle, and a sealing plug from the inside to the outside. The O-shaped sealing ring is placed on the first annular step surface , the briquetting block is connected to the pumping hole through a screw connection, the bottom end of the briquetting block abuts against the second annular step surface, the pore diameter of the briquetting block is smaller than the inner diameter of the O-ring, and the top ball Under the action of the spring, it is pressed against the lower side of the O-shaped sealing ring. The sealing plug is connected to the pumping and filling hole through a threaded connection. The side of the sealing plug is provided with an annular sealing ring; the transparent tube is pumped or inflated. At the same time, take off the sealing plug, use a tube whose outer diameter is less than or equal to the pore diameter of the briquetting block, press the top ball down, and then the color changing mechanism can be pumped and inflated.

Further, the transparent tube is a colorless plastic transparent tube or a glass tube.

Further, an annular sealing ring is provided at the bottom of the thread where the other end of the interface member is connected to the oil-immersed high-voltage bushing.

Further, the cover plate is connected to the protective case through a pin provided at one end of the side wall of the protective case.

Compared with the prior art, the present invention has the following beneficial effects: use the non-electrical method of silica gel to monitor the damp state of the bushing, which overcomes the problems of power failure detection, long detection period, and interference in the electrical method. The indicator has a simple structure Reliable, it can monitor and visually display the damp state of the bushing online, in real time, and can indicate the state at the initial stage of the bushing damp, reminding the operation and maintenance personnel to deal with it in time, avoiding the further development of the damp defect of the bushing and the occurrence of accidents, and ensuring its safe operation.

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic diagram of the use state of the pumping and filling hole in the embodiment of the present invention.

Fig. 3 is a schematic diagram of the working state of the embodiment of the present invention.

In the figure: 1-interface, 11-thread connected with oil-immersed high-voltage bushing, 12-ring sealing ring, 13-through hole, 2-transparent tube, 21-sealing plate, 22-color-changing silica gel, 3- Protective sleeve, 31-cover plate, 32-pin, 33-annular sealing ring at both ends of the transparent tube, 4-pumping air hole, 41-spring, 42-top bead, 43-O-ring, 44-press block, 45- Sealing plug, 46-pipe, 5-oil-immersed high-voltage bushing oil conservator, 51-oil.

detailed description

Embodiment 1: As shown in Figures 1 to 3, an oil-immersed high-voltage bushing damp state indicator includes an interface piece 1, one end of the interface piece 1 is provided with a groove, and the other end of the interface piece 1 Thread 11 for connecting with oil-immersed high-voltage bushing oil conservator 5 is provided on the outer wall, and a through hole 13 leading to the other end of the interface is provided in the middle of the groove, and the groove is connected with A discoloration mechanism, the discoloration mechanism includes a colorless transparent tube 2, the two ends of the transparent tube 2 are provided with a sealing plate 21, a color-changing silica gel 22 is placed in the transparent tube 2, and the sealing plate 21 is provided with There are several through holes with apertures smaller than the outer diameter of the color-changing silica gel 22. The transparent tube 2 is covered with a protective cover 3, and the protective cover 3 is evenly distributed with several observation holes for observing the color-changing silica gel 22. The protective cover 3 One end of the protective cover 3 is threadedly connected to the grooved end side wall of the interface piece 1, the other end of the protective sleeve 3 is provided with a cover plate 31 with a pit, and the other end of the color changing mechanism is pressed against the recess of the cover plate 31 inside the pit.

In this embodiment, in order to prevent air leakage, annular sealing rings 33 are provided on the sidewalls at both ends of the transparent tube 2 that are respectively in contact with the grooves and pits.

In this embodiment, the side wall of the interface piece 1 is provided with a pumping and charging hole 4 communicating with the through hole 13. The diameter of the pumping and charging hole 4 increases from the inside to the outside, and its inner wall forms a first hole from the inside to the outside. The annular step surface and the second annular step surface, the pumping and charging hole 4 is sequentially provided with a spring 41, a top ball 42, an O-shaped sealing ring 43, a pressure block 44 with an air hole in the middle, and a sealing plug 45. The O-shaped sealing ring 43 is placed on the first annular step surface, and the pressure block 44 is connected with the suction hole 4 through a threaded connection, and the bottom end of the pressure block 44 is against the second annular step surface, and the The pore diameter of the pressure block 44 is smaller than the inner diameter of the O-ring 43, and the top ball 42 is pressed against the lower side of the O-ring 43 under the action of the spring 41. connected, the side of the sealing plug 45 is provided with an annular sealing ring; when air is pumped or inflated in the transparent tube 2, the sealing plug 45 is removed, and a pipe 46 whose outer diameter is less than or equal to the briquetting pore diameter, The top bead 42 is pressed down, and the color changing mechanism can be pumped and inflated.

In this embodiment, the transparent tube is a colorless plastic transparent tube or a glass tube.

In this embodiment, an annular sealing ring 12 is provided at the bottom of the thread where the other end of the interface member 1 is connected to the oil-immersed high-voltage bushing.

In this embodiment, the cover plate 31 is connected to the protective case 3 through a pin 32 provided at one end of the side wall of the protective case.

When using this indicator, thread the indicator to the oil-immersed high-voltage bushing oil conservator 5, and the steam generated by the oil 51 in the oil-immersed high-voltage bushing oil conservator 5 enters the discoloration mechanism. Discoloration occurs, which means that the oil-immersed high-voltage bushing is damp.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the present invention.

Claims (5)

1. the oil-immersed and high-voltage sleeve pipe positioning indicator that makes moist, it is characterized in that: comprise mouthpiece, one end of described mouthpiece is provided with groove, on the lateral wall of the other end of described mouthpiece, be provided with the screw thread for being connected with oil-immersed and high-voltage sleeve pipe oil conservater, described groove middle part be provided with lead to the mouthpiece other end through hole, in described groove, be connected with variable color mechanism, described variable color mechanism comprises a colourless transparent pipe, the two ends of described transparent pipe are provided with shrouding, in described transparent pipe, be placed with discolour silica gel, on described shrouding, be provided with the through hole that several apertures are less than discolour silica gel external diameter, described transparent pipe is arranged with protective sleeve outward, on described protective sleeve, be evenly equipped with the peep hole that several observe discolour silica gel, the threaded one end of described protective sleeve is connected on one end sidewall of mouthpiece band groove, the other end of described protective sleeve is provided with the cover plate with pit, the other end contact of described variable color mechanism is in the pit of cover plate, on the sidewall of described mouthpiece, be provided with the air-filled pore of taking out being communicated with through hole, the described air-filled pore of taking out increases in aperture from inside to outside successively, its inwall forms the first annular terrace and the second annular terrace from inside to outside, described taking out is disposed with spring from inside to outside in air-filled pore, the decorative pearl on top of an official cap, O-ring seals, middle part arranges leachy briquetting, sealing-plug, described O-ring seals is placed on the first annular terrace, described briquetting is threaded connection and takes out air-filled pore and be connected, the bottom of described briquetting is resisted against on the second annular terrace, the air vent aperture of described briquetting is less than the internal diameter of O-ring seals, the described decorative pearl on top of an official cap under the effect of spring contact at the downside of O-ring seals, described sealing-plug is threaded connection and takes out air-filled pore and be connected, the side of described sealing-plug is provided with O-ring seal.

2. the oil-immersed and high-voltage sleeve pipe according to claim 1 positioning indicator that makes moist, is characterized in that: on the sidewall that described transparent pipe two ends contact with groove and pit respectively, be provided with O-ring seal.

3. the oil-immersed and high-voltage sleeve pipe according to claim 1 positioning indicator that makes moist, is characterized in that: described transparent pipe is colourless plastic, transparent pipe or glass tube.

4. the oil-immersed and high-voltage sleeve pipe according to claim 1 positioning indicator that makes moist, is characterized in that: the bottom of the screw thread that the described mouthpiece other end is connected with oil-immersed and high-voltage sleeve pipe is provided with O-ring seal.

5. the oil-immersed and high-voltage sleeve pipe according to claim 1 positioning indicator that makes moist, is characterized in that: described cover plate is connected with protective sleeve by the latch that is arranged on protective sleeve sidewall one end.