CN212745046U - Axial sealing device of SF6 gas neutral point protection device - Google Patents
Axial sealing device of SF6 gas neutral point protection device Download PDFInfo
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- CN212745046U CN212745046U CN202021741940.3U CN202021741940U CN212745046U CN 212745046 U CN212745046 U CN 212745046U CN 202021741940 U CN202021741940 U CN 202021741940U CN 212745046 U CN212745046 U CN 212745046U
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Abstract
The utility model relates to an axial sealing device of an SF6 gas neutral point protection device, which comprises a lightning arrester shell and a main shaft arranged in the inner cavity of the lightning arrester shell; the method is characterized in that: the flange cover plate and the main shaft cover plate are also included; the flange cover plate is fixedly connected with the lightning arrester shell through bolts; one end of the main shaft penetrates through the flange cover plate and a main shaft hole of the main shaft cover plate and is installed on the flange cover plate through the main shaft cover plate, and a countersunk hole concentric with the main shaft is formed in one end, close to the main shaft cover plate, of the flange cover plate; an elastic sealing element is arranged in the countersunk hole; the elastic sealing element comprises a sealing ring, an adjusting gasket and a belleville spring; the seal ring, the adjusting washer and the belleville spring are sequentially installed in the counter bore from the bottom to the outside; the belleville spring is in contact with the main shaft cover plate. The utility model discloses the practicality is strong, easily promotes.
Description
Technical Field
The utility model belongs to the technical field of the transformer technique and specifically relates to an axial seal device of gaseous neutral point protection device of SF6 is related to.
Background
At present, in the field of transformer technology, the field of complete protection devices for the ac neutral point of a transformer still adopts the structure of a traditional product, and the device generally comprises electric elements such as an isolating switch, a lightning arrester, a protection gap, a current transformer and the like, and the electric elements are installed in the closed space of the shell through arranging the shell with the closed space, and the insulating arc extinguishing effect is realized by filling SF6 gas into the shell; but the main shaft penetrates out of the shell, so that the joint of the main shaft has the risk of air leakage; SF6 gas in the time-out transformer leaks out, so that the arc extinguishing effect is weakened to cause potential safety hazards; therefore, a new type of axial sealing device needs to be designed.
SUMMERY OF THE UTILITY MODEL
To the not enough of prior art existence, the utility model aims to provide an axial seal device of gaseous neutral point protection device of SF 6.
The technical scheme of the utility model is realized like this: an axial sealing device of an SF6 gas neutral point protection device comprises a lightning arrester housing and a main shaft arranged in an inner cavity of the lightning arrester housing; the method is characterized in that: the flange cover plate and the main shaft cover plate are also included; the flange cover plate is fixedly connected with the lightning arrester shell through bolts; one end of the main shaft penetrates through the flange cover plate and a main shaft hole of the main shaft cover plate and is installed on the flange cover plate through the main shaft cover plate, and a countersunk hole concentric with the main shaft is formed in one end, close to the main shaft cover plate, of the flange cover plate; an elastic sealing element is arranged in the countersunk hole; the elastic sealing element comprises a sealing ring, an adjusting gasket and a belleville spring; the seal ring, the adjusting washer and the belleville spring are sequentially installed in the counter bore from the bottom to the outside; the belleville spring is in contact with the main shaft cover plate.
Preferably: the sealing rings sequentially comprise a first sealing ring, a second sealing ring and a third sealing ring; grooves are formed in one side faces, facing the third sealing ring, of the first sealing ring and the second sealing ring; and flanges matched with the grooves are arranged on one side surfaces, facing the first sealing ring, of the second sealing ring and the third sealing ring.
Preferably: the contact surface of the flange cover plate and the lightning arrester shell is provided with an installation groove; a rubber ring is arranged in the mounting groove; the rubber ring is provided with a deformation groove.
Preferably: the flange cover plate and the main shaft cover plate are both provided with bearing mounting grooves concentric with the main shaft hole, and a supporting bearing fixedly sleeved on the main shaft is mounted in each bearing mounting groove.
Preferably: an outer ring is integrally formed on the connecting surface of the main shaft and the flange cover plate, the outer ring is sleeved on the main shaft, and a rubber sealing gasket is arranged between the outer ring and the connecting surface of the flange cover plate.
Compared with the prior art, the utility model discloses the beneficial effect who brings does:
1. compared with the prior art, the traditional main shaft directly penetrates through the cover plate, and the sealing ring is arranged on the cover plate, at the present stage, the mounting end of the shell is connected by adopting a flange, and the connecting surface of the flange cover plate and the main shaft is provided with the elastic sealing element consisting of the sealing ring, the adjusting washer and the belleville spring; when the shell is inflated, gas can escape along a gap between the flange and the main shaft, and when the sealing ring is met, the sealing ring and the belleville spring can be pushed to deform, so that the sealing ring is well squeezed towards two sides under the reaction force of the belleville spring and the acting force of air pressure, and the axial sealing effect is realized;
in addition, the flange cover plate and the main shaft cover plate can be detached, so that workers can replace, maintain and maintain the elastic sealing element inside the flange cover plate at regular intervals, and the air leakage phenomenon caused by the damage of the elastic sealing element is avoided.
2. The sealing rings are arranged into a first sealing ring, a second sealing ring and a third sealing ring which are matched with each other; such an arrangement functions compared to a conventional single seal ring: because the adjacent sealing rings are provided with the mutually matched gaps, when the gas pressure and the rebound force of the spring are received, the contact surfaces of the adjacent sealing rings can be mutually extruded, the effect that each sealing ring can circumferentially deform is realized, and the axial sealing effect is improved; in addition, when a single sealing ring is damaged, the sealing effect can still be generated, the air leakage condition can not occur, and the replacement and the maintenance are convenient.
3. An installation groove is formed in the contact surface of the flange cover plate and the lightning arrester shell; a rubber ring is arranged in the mounting groove; the rubber ring is provided with a deformation groove; in such a way, the phenomenon of air leakage of the contact surface between the flange cover plate and the lightning arrester shell can be prevented; it should be noted that the rubber ring is provided with the deformation groove, so that the rubber ring is softer, the deformation capacity is high during use, and the sealing effect is better realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, 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 inventive exercise.
FIG. 1 is a schematic structural view of an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a seal ring;
fig. 3 is a schematic cross-sectional view of a rubber ring.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1-3, the utility model discloses an axial sealing device of SF6 gas neutral point protection device, comprising an arrester housing 1 and a main shaft 2 arranged in the inner cavity of the arrester housing 1; in the specific embodiment of the utility model, the utility model also comprises a flange cover plate 3 and a main shaft cover plate 4; the flange cover plate 3 is fixedly connected with the lightning arrester shell 1 through bolts; one end of the main shaft 2 penetrates through main shaft holes of a flange cover plate 3 and a main shaft cover plate 4 and is installed on the flange cover plate 3 through the main shaft cover plate 4, and a countersunk hole 41 concentric with the main shaft 2 is formed in one end, close to the main shaft cover plate 4, of the flange cover plate 3; an elastic sealing element 5 is arranged in the counter bore 41; the elastic sealing element 5 comprises a sealing ring 51, an adjusting washer 52 and a belleville spring 53; the seal ring 51, the adjusting washer 52 and the belleville spring 53 are sequentially installed in the counter bore 41 from the bottom to the outside; the belleville spring 53 is in contact with the spindle cover plate, and the sealing ring 51 is sleeved on the spindle 2.
The butterfly spring is a washer type spring with a truncated cone-shaped section formed by forging and pressing blanks, is sleeved on the main shaft, and cannot incline, so that the sealing performance is further improved.
In the embodiment of the present invention, the sealing ring 51 includes a first sealing ring 511, a second sealing ring 512, and a third sealing ring 513 in sequence; grooves are formed in one side faces, facing the third sealing ring 513, of the first sealing ring 511 and the second sealing ring 512; the second sealing ring 512 and the third sealing ring 513 are provided with flanges adapted to the grooves on their sides facing the first sealing ring 511.
In the specific embodiment of the present invention, an installation groove 6 is disposed on the contact surface between the flange cover plate 3 and the arrester housing 1; a rubber ring 61 is arranged in the mounting groove 6; the rubber ring 61 is provided with a deformation groove 611.
The utility model discloses in the concrete implementation mode, all set up on blind flange 3 and the main shaft cover 4 with the concentric bearing mounting groove 7 in main shaft hole, install fixed cover in this bearing mounting groove 7 and establish the support bearing on main shaft 2.
The utility model discloses in the concrete implementation mode, integrated into one piece has outer ring 8 on the face is connected to main shaft 2 and blind flange 3, and this outer ring 8 cover is established on main shaft 2, and is provided with rubber packing pad 9 between the face is connected to this outer ring 8 and blind flange 3.
Compared with the prior art, the utility model discloses the beneficial effect who brings does:
1. compared with the prior art, the traditional main shaft directly penetrates through the cover plate, and the sealing ring is arranged on the cover plate, at the present stage, the mounting end of the shell is connected by adopting a flange, and the connecting surface of the flange cover plate and the main shaft is provided with the elastic sealing element consisting of the sealing ring, the adjusting washer and the belleville spring; when the shell is inflated, gas can escape along a gap between the flange and the main shaft, and when the sealing ring is met, the sealing ring and the belleville spring can be pushed to deform, so that the sealing ring is well squeezed towards two sides under the reaction force of the belleville spring and the acting force of air pressure, and the axial sealing effect is realized;
in addition, the flange cover plate and the main shaft cover plate can be detached, so that workers can replace, maintain and maintain the elastic sealing element inside the flange cover plate at regular intervals, and the air leakage phenomenon caused by the damage of the elastic sealing element is avoided.
2. The sealing rings are arranged into a first sealing ring, a second sealing ring and a third sealing ring which are matched with each other; such an arrangement functions compared to a conventional single seal ring: because the adjacent sealing rings are provided with the mutually matched gaps, when the gas pressure and the rebound force of the spring are received, the contact surfaces of the adjacent sealing rings can be mutually extruded, the effect that each sealing ring can circumferentially deform is realized, and the axial sealing effect is improved; in addition, when a single sealing ring is damaged, the sealing effect can still be generated, the air leakage condition can not occur, and the replacement and the maintenance are convenient.
3. An installation groove is formed in the contact surface of the flange cover plate and the lightning arrester shell; a rubber ring is arranged in the mounting groove; the rubber ring is provided with a deformation groove; in such a way, the phenomenon of air leakage of the contact surface between the flange cover plate and the lightning arrester shell can be prevented; it should be noted that the rubber ring is provided with the deformation groove, so that the rubber ring is softer, the deformation capacity is high during use, and the sealing effect is better realized.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. An axial sealing device of an SF6 gas neutral point protection device comprises a lightning arrester housing and a main shaft arranged in an inner cavity of the lightning arrester housing; the method is characterized in that: the flange cover plate and the main shaft cover plate are also included; the flange cover plate is fixedly connected with the lightning arrester shell through bolts; one end of the main shaft penetrates through the flange cover plate and a main shaft hole of the main shaft cover plate and is installed on the flange cover plate through the main shaft cover plate, and a countersunk hole concentric with the main shaft is formed in one end, close to the main shaft cover plate, of the flange cover plate; an elastic sealing element is arranged in the countersunk hole; the elastic sealing element comprises a sealing ring, an adjusting gasket and a belleville spring; the seal ring, the adjusting washer and the belleville spring are sequentially installed in the counter bore from the bottom to the outside; the belleville spring is in contact with the main shaft cover plate.
2. The axial seal arrangement of an SF6 gas neutral point protection device of claim 1, wherein: the sealing rings sequentially comprise a first sealing ring, a second sealing ring and a third sealing ring; grooves are formed in one side faces, facing the third sealing ring, of the first sealing ring and the second sealing ring; and flanges matched with the grooves are arranged on one side surfaces, facing the first sealing ring, of the second sealing ring and the third sealing ring.
3. The axial seal arrangement of an SF6 gas neutral point protection device of claim 2, wherein: the contact surface of the flange cover plate and the lightning arrester shell is provided with an installation groove; a rubber ring is arranged in the mounting groove; the rubber ring is provided with a deformation groove.
4. The axial seal arrangement of an SF6 gas neutral point protection device of claim 3, wherein: the flange cover plate and the main shaft cover plate are both provided with bearing mounting grooves concentric with the main shaft hole, and a supporting bearing fixedly sleeved on the main shaft is mounted in each bearing mounting groove.
5. The axial seal arrangement of an SF6 gas neutral point protection device of claim 3, wherein: an outer ring is integrally formed on the connecting surface of the main shaft and the flange cover plate, the outer ring is sleeved on the main shaft, and a rubber sealing gasket is arranged between the outer ring and the connecting surface of the flange cover plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021741940.3U CN212745046U (en) | 2020-08-20 | 2020-08-20 | Axial sealing device of SF6 gas neutral point protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021741940.3U CN212745046U (en) | 2020-08-20 | 2020-08-20 | Axial sealing device of SF6 gas neutral point protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212745046U true CN212745046U (en) | 2021-03-19 |
Family
ID=74989101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021741940.3U Active CN212745046U (en) | 2020-08-20 | 2020-08-20 | Axial sealing device of SF6 gas neutral point protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212745046U (en) |
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2020
- 2020-08-20 CN CN202021741940.3U patent/CN212745046U/en active Active
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