CN209822455U - Power transformer with arc control device - Google Patents
Power transformer with arc control device Download PDFInfo
- Publication number
- CN209822455U CN209822455U CN201920014761.0U CN201920014761U CN209822455U CN 209822455 U CN209822455 U CN 209822455U CN 201920014761 U CN201920014761 U CN 201920014761U CN 209822455 U CN209822455 U CN 209822455U
- Authority
- CN
- China
- Prior art keywords
- arc extinguishing
- power transformer
- contact rod
- static contact
- rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000003068 static effect Effects 0.000 claims abstract description 39
- 238000007789 sealing Methods 0.000 claims description 21
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 238000010891 electric arc Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 4
- 238000004804 winding Methods 0.000 description 3
- 230000004907 flux Effects 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model discloses a power transformer with arc control device, it is including the power transformer body be provided with mated electrode contact on the power transformer body, it is still including arc control device, insulating cover fixed cover is put on the arc extinguishing shell, and insulating cover passes through support fixed mounting on the power transformer body, quiet feeler lever fixed mounting is at the lower tip of arc extinguishing shell, sets up in the lower part of arc extinguishing shell and is insulating oil pocket, has stored insulating oil in this insulating oil pocket, and the upper portion setting of quiet feeler lever is the static contact, and this static contact is located insulating oil intracavity, movable contact lever activity is planted in the upper portion of arc extinguishing shell to contact with the static contact, the utility model discloses the advantage is: the arc extinguishing device has the advantages of simple structure, convenience in use, small occupied space, lower cost and higher arc extinguishing speed, and reduces the damage to the movable contact rod and the static contact.
Description
Technical Field
The utility model relates to a power transformer's technical field, more specifically say so and relate to power transformer's with arc extinguishing function technical field.
Background
A power transformer is a stationary electrical device that is used to transform an ac voltage (current) of a certain value into another voltage (current) of the same frequency or different values. When the primary winding is energized with an alternating current, an alternating magnetic flux is generated, and the alternating magnetic flux is magnetically conducted through the iron core, so that an alternating electromotive force is induced in the secondary winding. The level of the secondary induced electromotive force is related to the number of turns of the primary winding, i.e. the voltage is proportional to the number of turns.
The power transformer is often provided with the device that is used for restricting electric arc and helps electric arc to extinguish, this kind of device is called arc control device, for example chinese patent publication is a power transformer with arc control device that CN107680775A proposed, including arc extinguishing rod, insulator, peripheral solid fixed ring and interior solid fixed ring, in the draw-in groove of the fixed plate of upper and lower both sides was blocked respectively at arc extinguishing rod upper end both ends, be equipped with the power transformer fixing base between two fixed plates, the device is when using, simple to operate also is convenient for adjust, but occupation space is big, arc extinguishing mode through retaining ring isotructure, it is not convenient enough when using.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a power transformer with arc control device that simple structure, occupation space is little, and convenient to use has fine arc extinguishing effect for solving above-mentioned not enough.
The utility model discloses a solve above-mentioned technical problem and the technical solution who adopts as follows:
a power transformer with an arc extinguishing device comprises a power transformer body, paired electrode contacts are arranged on the power transformer body, the arc extinguishing device also comprises the arc extinguishing device, the arc extinguishing device comprises a support, an insulating sleeve, an arc extinguishing shell, a top cover, a movable contact rod, a static contact rod and an electric push rod, the insulating sleeve is fixedly sleeved on the arc extinguishing shell, the insulating sleeve is fixedly installed on the power transformer body through the support, the static contact rod is fixedly installed at the lower end part of the arc extinguishing shell, an insulating oil cavity is arranged in the lower part of the arc extinguishing shell, insulating oil is stored in the insulating oil cavity, a static contact is arranged at the upper part of the static contact rod and is positioned in the insulating oil cavity, the movable contact rod is movably inserted in the upper part of the arc extinguishing shell and is in contact with the static contact, a guide hole is formed in the top cover, and the top cover is sleeved on the movable contact rod through the, the top cover is fixedly installed at the upper end part of the arc extinguishing shell, the electric push rod is fixedly installed on the top cover, a telescopic rod of the electric push rod is fixedly connected with the movable contact rod, a first connecting end is arranged at the upper end part of the movable contact rod, a second connecting end is arranged at the lower end part of the static contact rod, and the first connecting end of the movable contact rod and the second connecting end of the static contact rod are respectively and electrically connected with an electrode contact of the power transformer body.
And paired arc-shaped grooves are formed in the bottom of the movable contact rod and are positioned on two sides of the static contact.
The insulating sleeve is a ceramic insulating sleeve or a polyethylene insulating sleeve.
The arc extinguishing device also comprises a first sealing ring, a second sealing ring, a third sealing ring, a fourth sealing ring, a first bolt, a first nut and a second nut, wherein a first annular plate is arranged on the periphery of the static contact rod, a first through hole is formed in the first annular plate, a first screw rod is arranged at the bottom of the arc extinguishing shell, a limiting hole is further formed in the bottom of the arc extinguishing shell, the static contact rod is clamped at the limiting hole of the arc extinguishing shell and is sleeved on the first screw rod through the first through hole of the first annular plate, the first nut is screwed on the first screw rod, a first annular groove is formed in the upper surface of the first annular plate, the first sealing ring is clamped in the first annular groove, a first flange plate is arranged at the upper part of the arc extinguishing shell, a second flange plate is arranged on the top cover, and corresponding second through holes are formed in the first flange plate and the second flange plate, the first bolt penetrates through the second through holes of the first flange plate and the second flange plate, the second nut is screwed on the first bolt, corresponding second annular grooves are respectively formed in the upper surface of the first flange plate and the lower surface of the second flange plate, the second sealing ring is clamped in the second annular groove, a third annular groove is formed in the inner side wall of the top cover guide hole, the third sealing ring is clamped in the third annular groove, a fourth annular groove is formed in the outer side wall of the movable contact rod in the arc extinguishing shell, and the fourth sealing ring is clamped in the fourth annular groove.
The utility model adopts the beneficial effect that above-mentioned technical solution can reach is:
1. the power transformer with the arc extinguishing device is simple in structure, convenient to use, small in occupied space and low in cost.
2. Through the oil-cooled arc extinguishing mode, the arc extinguishing speed is higher, and the damage to the movable contact rod and the static contact is reduced.
3. The arc-shaped groove is formed in the bottom of the movable contact rod, so that oil gas in the arc extinguishing shell can form a vortex shape, impact on electric arcs is increased, and the arc extinguishing effect is improved.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
fig. 3 is a partially enlarged schematic view of a portion B in fig. 1.
Detailed Description
As shown in fig. 1, a power transformer with an arc extinguishing device comprises a power transformer body 1, paired electrode contacts 2 are arranged on the power transformer body 1, and the arc extinguishing device further comprises an arc extinguishing device, wherein the arc extinguishing device comprises a support 3, an insulating sleeve 4, an arc extinguishing housing 5, a top cover 6, a movable contact rod 7, a stationary contact rod 8, an electric push rod 9, a first sealing ring 19, a second sealing ring 20, a third sealing ring 21, a fourth sealing ring 22, a first bolt 23, a first nut 24 and a second nut 25, the insulating sleeve 4 is fixedly sleeved on the arc extinguishing housing 5, the insulating sleeve 4 is a ceramic insulating sleeve or a polyethylene insulating sleeve, and the insulating sleeve 4 is fixedly installed on the power transformer body 1 through the support 3. The static contact rod 8 is fixedly installed at the lower end part of the arc extinguishing shell 5, and the specific connection relation between the static contact rod 8 and the arc extinguishing shell 5 is as follows: as shown in fig. 3, a first annular plate 26 is disposed on a peripheral portion of the stationary contact bar 8, a first through hole 27 is formed in the first annular plate 26, a first screw 28 is disposed at a bottom of the arc extinguishing casing 5, a limiting hole 29 is further formed at the bottom of the arc extinguishing casing 5, the stationary contact bar 8 is clamped in the limiting hole 29 of the arc extinguishing casing 5 and is sleeved on the first screw 28 through the first through hole 27 of the first annular plate 26, the first nut 24 is screwed on the first screw 28, a first annular groove is formed in an upper surface of the first annular plate 26, and the first seal ring 19 is clamped in the first annular groove. An insulating oil cavity 10 is arranged in the lower part of the arc extinguishing shell 5, and insulating oil is stored in the insulating oil cavity 10. The upper part of the static contact rod 8 is provided with a static contact 11, the static contact 11 is positioned in the insulating oil cavity 10, the movable contact rod 7 is movably inserted in the upper part of the arc extinguishing shell 5 and is contacted with the static contact 11, the bottom of the movable contact rod 7 is provided with a pair of arc-shaped grooves 18, and the pair of arc-shaped grooves 18 are positioned at two sides of the static contact 11. A fourth annular groove is arranged on the outer side wall of the movable contact rod 7 positioned in the arc extinguishing shell 5, and the fourth sealing ring 22 is clamped in the fourth annular groove. The top cover 6 is provided with a guide hole 12, the top cover 6 is sleeved on the movable contact rod 7 through the guide hole 12, a third annular groove is formed in the inner side wall of the guide hole 12 of the top cover 6, the third seal ring 21 is clamped in the third annular groove, the top cover 6 is fixedly installed at the upper end part of the arc extinguishing shell 5, and the specific connection relation between the top cover 6 and the arc extinguishing shell 5 is as follows: as shown in fig. 2, a first flange plate 30 is disposed on the upper portion of the arc extinguishing housing 5, a second flange plate 31 is disposed on the top cover 6, corresponding second through holes 32 are formed in the first flange plate 30 and the second flange plate 31, the first bolts 23 pass through the second through holes 32 of the first flange plate 30 and the second flange plate 31, the second nuts 25 are screwed on the first bolts 23, corresponding second annular grooves are respectively formed in the upper surface of the first flange plate 30 and the lower surface of the second flange plate 31, and the second seal ring 20 is clamped in the second annular groove. The electric push rod 9 is fixedly arranged on the top cover 6 through a support plate 13, a telescopic rod 14 of the electric push rod 9 is fixedly connected with the movable contact rod 7 through a connecting plate 15, a first connecting end 16 is arranged at the upper end of the movable contact rod 7, a second connecting end 17 is arranged at the lower end of the static contact rod 8, and the first connecting end 16 of the movable contact rod 7 and the second connecting end 17 of the static contact rod 8 are respectively and electrically connected with the electrode contact 2 of the power transformer body 1 through a lead 35.
The working principle of the power transformer with the arc extinguishing device is as follows: the movable contact rod 7 and the static contact rod 8 are used as two poles of a switch of the power transformer body 1, the movable contact rod 7 and the static contact 11 are in a normally closed state, and when a circuit needs to be disconnected, the movable contact rod 7 is pushed upwards to be separated from the static contact 11 by controlling the extension of the telescopic rod 14 of the electric push rod 9, so that the circuit is disconnected. Mechanical switchgear is designed to break a circuit current with contacts, and when the circuit is broken in the atmosphere, as long as the voltage exceeds 12-20V, the broken current exceeds 0.25-1A, and a mass of nearly cylindrical gas that is extremely high in temperature, emits strong light, and can conduct electricity, i.e., an arc, is generally generated in a contact gap (also called an arc gap). After the movable contact rod 7 moves upwards, a gap is generated in the inner cavity of the arc extinguishing shell 5, and a negative pressure condition occurs at the same time, an electric arc phenomenon occurs between the movable contact rod 7 and the static contact 11, and under the action of the electric arc, the insulating oil in the insulating oil cavity 10 is vaporized and decomposed by the electric arc to form oil gas. The main component of the oil gas is hydrogen, which surrounds the arc in the form of bubbles in the oil. The hydrogen has very high heat conductivity coefficient, so that the heat of the electric arc is easily dissipated, the vaporized oil upwards surges to impact a gap between the movable contact rod 7 and the static contact 11, the arc-shaped groove 18 is formed in the bottom of the movable contact rod 7, and the arc-shaped groove 18 plays roles of buffering and changing the flowing direction of the vaporized oil, so that a vortex is generated, the impact effect on the electric arc is increased, and the arc extinguishing effect is improved.
Claims (4)
1. The utility model provides a power transformer with arc control device, it is including the power transformer body be provided with mated electrode contact on the power transformer body, its characterized in that: the arc extinguishing device comprises a support, an insulating sleeve, an arc extinguishing shell, a top cover, a movable contact rod, a static contact rod and an electric push rod, wherein the insulating sleeve is fixedly sleeved on the arc extinguishing shell, the insulating sleeve is fixedly arranged on a power transformer body through the support, the static contact rod is fixedly arranged at the lower end part of the arc extinguishing shell, an insulating oil cavity is arranged in the lower part of the arc extinguishing shell, insulating oil is stored in the insulating oil cavity, a static contact is arranged at the upper part of the static contact rod and is positioned in the insulating oil cavity, the movable contact rod is movably inserted in the upper part of the arc extinguishing shell and is contacted with the static contact, a guide hole is formed in the top cover, the top cover is sleeved on the movable contact rod through the guide hole, the top cover is fixedly arranged at the upper end part of the arc extinguishing shell, the electric push rod is fixedly arranged on the top cover, and a telescopic rod of the, the upper end part of the movable contact rod is provided with a first connecting end, the lower end part of the static contact rod is provided with a second connecting end, and the first connecting end of the movable contact rod and the second connecting end of the static contact rod are respectively and electrically connected with the electrode contact of the power transformer body.
2. A power transformer with an arc extinguishing device according to claim 1, characterized in that: and paired arc-shaped grooves are formed in the bottom of the movable contact rod and are positioned on two sides of the static contact.
3. A power transformer with an arc extinguishing device according to claim 1 or 2, characterized in that: the insulating sleeve is a ceramic insulating sleeve or a polyethylene insulating sleeve.
4. A power transformer with an arc extinguishing device according to claim 1 or 2, characterized in that: the arc extinguishing device also comprises a first sealing ring, a second sealing ring, a third sealing ring, a fourth sealing ring, a first bolt, a first nut and a second nut, wherein a first annular plate is arranged on the periphery of the static contact rod, a first through hole is formed in the first annular plate, a first screw rod is arranged at the bottom of the arc extinguishing shell, a limiting hole is further formed in the bottom of the arc extinguishing shell, the static contact rod is clamped at the limiting hole of the arc extinguishing shell and is sleeved on the first screw rod through the first through hole of the first annular plate, the first nut is screwed on the first screw rod, a first annular groove is formed in the upper surface of the first annular plate, the first sealing ring is clamped in the first annular groove, a first flange plate is arranged at the upper part of the arc extinguishing shell, a second flange plate is arranged on the top cover, and corresponding second through holes are formed in the first flange plate and the second flange plate, the first bolt penetrates through the second through holes of the first flange plate and the second flange plate, the second nut is screwed on the first bolt, corresponding second annular grooves are respectively formed in the upper surface of the first flange plate and the lower surface of the second flange plate, the second sealing ring is clamped in the second annular groove, a third annular groove is formed in the inner side wall of the top cover guide hole, the third sealing ring is clamped in the third annular groove, a fourth annular groove is formed in the outer side wall of the movable contact rod in the arc extinguishing shell, and the fourth sealing ring is clamped in the fourth annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920014761.0U CN209822455U (en) | 2019-01-05 | 2019-01-05 | Power transformer with arc control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920014761.0U CN209822455U (en) | 2019-01-05 | 2019-01-05 | Power transformer with arc control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209822455U true CN209822455U (en) | 2019-12-20 |
Family
ID=68870708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920014761.0U Expired - Fee Related CN209822455U (en) | 2019-01-05 | 2019-01-05 | Power transformer with arc control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209822455U (en) |
-
2019
- 2019-01-05 CN CN201920014761.0U patent/CN209822455U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191220 Termination date: 20200105 |