CN221783125U - A sealing mechanism for a circuit breaker of a high voltage switch accessory - Google Patents
A sealing mechanism for a circuit breaker of a high voltage switch accessory Download PDFInfo
- Publication number
- CN221783125U CN221783125U CN202323373403.4U CN202323373403U CN221783125U CN 221783125 U CN221783125 U CN 221783125U CN 202323373403 U CN202323373403 U CN 202323373403U CN 221783125 U CN221783125 U CN 221783125U
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- CN
- China
- Prior art keywords
- cylinder
- seat
- sliding seat
- sealing
- circuit breaker
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- 238000007789 sealing Methods 0.000 title claims abstract description 83
- 230000007246 mechanism Effects 0.000 title claims abstract description 19
- 229910018503 SF6 Inorganic materials 0.000 claims abstract description 17
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229960000909 sulfur hexafluoride Drugs 0.000 claims abstract description 13
- 239000012535 impurity Substances 0.000 abstract description 7
- 230000006835 compression Effects 0.000 abstract description 5
- 238000007906 compression Methods 0.000 abstract description 5
- 239000000428 dust Substances 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 20
- 238000000034 method Methods 0.000 description 5
- 230000002688 persistence Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229920000459 Nitrile rubber Polymers 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 229920001973 fluoroelastomer Polymers 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- -1 external moisture Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The utility model relates to the technical field of circuit breakers, in particular to a sealing mechanism of a high-voltage switch accessory circuit breaker, which comprises a contact seat and a cylinder, wherein one end of the contact seat extends into the cylinder, the outer surface of the contact seat, which is close to one end of the cylinder, is provided with a containing groove, the inside of the containing groove is connected with a sealing structure, the sealing structure comprises a sliding seat, the outer surface of the sliding seat is in sliding connection with the inner wall of the cylinder, the inner surface of the sliding seat is connected with a sealing ring, and the sealing ring is positioned in the containing groove and sleeved on the outer surface of the contact seat, and two side surfaces of the sliding seat are embedded with compression rings. According to the utility model, the sealing structure is arranged between the touch seat and the cylinder, the sealing structure can enhance the sealing performance between the touch seat and the cylinder, sulfur hexafluoride gas is prevented from leaking from a gap between the touch seat and the cylinder, the breaking performance of the circuit breaker is prevented from being influenced, and external moisture, dust and other impurities can be prevented from entering the cylinder.
Description
Technical Field
The utility model relates to the technical field of circuit breakers, in particular to a sealing mechanism of a high-voltage switch accessory circuit breaker.
Background
When the short-circuit current is cut off, the arc extinguishing chamber of the conventional high-voltage switch breaker generally adopts a self-energy arc extinguishing mode of thermal expansion and blowing assisting. When the short-circuit current is cut off, the electric arc burns between the movable arc contact and the fixed arc contact, and the SF6 gas in the cylinder is heated by huge energy to raise the temperature, so that the pressure of the gas in the cylinder is raised, and the internal and external pressure difference is generated. When the movable contact is switched off to a certain position, the static arc contact is pulled out of the nozzle to generate strong air blowing, and the arc is extinguished when the current crosses zero. When the small inductance, capacitance current or load current is switched on and off, the switched-on current is small, the arc energy is small, and at the moment, the compression air chamber in the switching-off process is mainly used for establishing arc extinguishing pressure, so that the arc is extinguished. Through the different arc extinguishing means, the arc extinguishing chamber has the switching-on and switching-off capability under different current conditions.
Based on this arc extinction principle, it is required that SF6 gas in the cylinder should be confined as much as possible in the cylinder before the break-gate static arcing contact is pulled out of the nozzle. However, in the existing high-voltage switch breaker, a conventional guide sleeve is adopted between a contact seat and a cylinder, a gap between the guide sleeve and the contact seat and a gap between the guide sleeve and the cylinder are large, gas flows in the gap between the guide sleeve and the cylinder easily, so that SF6 gas quantity in a compressed gas chamber is reduced when an arc extinguishing chamber is opened and closed, the opening performance of the breaker is affected, and therefore, a sealing mechanism of the high-voltage switch accessory breaker is designed.
Disclosure of utility model
Aiming at the defects of the prior art, the utility model provides a sealing mechanism of a high-voltage switch accessory breaker, which solves the problems that in the existing high-voltage switch breaker, a conventional guide sleeve is adopted between a contact seat and a cylinder, the gap between the guide sleeve and the contact seat is larger, gas is easy to circulate in the gap between the guide sleeve and the cylinder, so that the SF6 gas quantity in a compressed gas chamber is reduced when an arc extinguishing chamber is opened and closed, and the opening and closing performance of the breaker is affected.
In order to solve the technical problems, the utility model provides the following technical scheme: the sealing mechanism of the high-voltage switch accessory breaker comprises a contact seat and an air cylinder, wherein one end of the contact seat extends into the air cylinder, an accommodating groove is formed in the outer surface of one end, close to the air cylinder, of the contact seat, and a sealing structure is connected inside the accommodating groove;
The sealing structure comprises a sliding seat, the outer surface of the sliding seat is in sliding connection with the inner wall of the air cylinder, the inner surface of the sliding seat is connected with a sealing ring, the sealing ring is positioned in the accommodating groove and sleeved on the outer surface of the touch seat, and compression rings are embedded on the two side surfaces of the sliding seat.
Further, the T-shaped groove is formed in the inner surface of the sliding seat, the T-shaped block is connected to the outer surface of the sealing ring, and the T-shaped block is arranged in the T-shaped groove.
Further, the sealing ring and the T-shaped block are integrally formed, and the outer diameter of the sealing ring is the same as the inner diameter of the sliding seat.
Further, a chamfer is arranged on one side, close to the cylinder, of the sliding seat.
Further, the outer surface of the sliding seat is provided with a plurality of grooves.
Further, the shape of the accommodating groove is circular.
Further, a compressed air chamber is formed in the cavity between the touch seat and the cylinder, and sulfur hexafluoride gas is arranged in the compressed air chamber.
By means of the technical scheme, the utility model provides a sealing mechanism of a high-voltage switch accessory breaker, which has at least the following beneficial effects:
1. The sealing mechanism of the high-voltage switch accessory breaker is provided with a sealing structure between the contact seat and the cylinder, the sealing structure can strengthen the sealing performance between the contact seat and the cylinder, sulfur hexafluoride gas is prevented from leaking from a gap between the contact seat and the cylinder, the breaking performance of the breaker is prevented from being influenced, and impurities such as external moisture, dust and the like can be prevented from entering the cylinder.
2. This high tension switch accessory circuit breaker sealing mechanism, the sealing washer is fixed in the sliding seat, and the elasticity of sealing washer can make the sliding seat closely laminate on the inner wall of cylinder, ensures seal structure's compactness and persistence, prevents that the inside gaseous leakage of cylinder or external impurity from getting into in the cylinder, and the setting up of clamping ring makes the sliding seat more stable, difficult emergence deformation has further improved sealing performance.
3. This high tension switch accessory circuit breaker sealing mechanism is equipped with the T-shaped groove at the internal surface of sliding seat, and the surface of sealing washer is equipped with T shape piece, and the T shape piece is pegged graft in the inside of T-shaped groove, is convenient for install on the sliding seat to the sealing washer, and it is also comparatively convenient to dismantle the change.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model, illustrate and together with the description serve to explain a part of the utility model:
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a left side view of the seal structure of the present utility model;
FIG. 3 is a right side view of the seal structure of the present utility model;
FIG. 4 is a schematic view of a sliding seat according to the present utility model;
FIG. 5 is a schematic view of a seal ring according to the present utility model.
In the figure: 100. a touch seat; 200. a cylinder; 300. a receiving groove; 400. a sealing structure; 401. a sliding seat; 402. a seal ring; 403. a compression ring; 404. a T-shaped groove; 405. t-shaped blocks.
Detailed description of the preferred embodiments
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1, a sealing mechanism for a high-voltage switch accessory breaker comprises a contact base 100 and a cylinder 200, wherein one end of the contact base 100 extends into the cylinder 200, an accommodating groove 300 is formed in the outer surface of one end, close to the cylinder 200, of the contact base 100, the accommodating groove 300 is circular, and a sealing structure 400 is connected to the inner part of the accommodating groove 300. The sealing structure 400 is arranged between the touch seat 100 and the cylinder 200, the sealing structure 400 can enhance the sealing performance between the touch seat 100 and the cylinder 200, prevent sulfur hexafluoride gas from leaking from a gap between the touch seat 100 and the cylinder 200, avoid affecting the breaking performance of the circuit breaker, and prevent external moisture, dust and other impurities from entering the cylinder 200.
As shown in fig. 2 and 3, the sealing structure 400 includes a sliding seat 401, an outer surface of the sliding seat 401 is slidably connected with an inner wall of the cylinder 200, a sealing ring 402 is connected to an inner surface of the sliding seat 401, and the sealing ring 402 is located in the accommodating groove 300 and sleeved on an outer surface of the contact seat 100, and compression rings 403 are embedded on two side surfaces of the sliding seat 401. The sealing washer 402 is fixed in the sliding seat 401, and the elasticity of sealing washer 402 can make sliding seat 401 closely laminate on the inner wall of cylinder 200, ensures seal structure 400's compactness and persistence, prevents the inside gaseous leakage of cylinder 200 or external impurity entering cylinder 200 in, and the setting of clamping ring 403 makes sliding seat 401 more stable, difficult emergence deformation, has further improved sealing performance.
As shown in fig. 4 and 5, the inner surface of the sliding seat 401 is provided with a T-shaped groove 404, the outer surface of the sealing ring 402 is connected with a T-shaped block 405, the T-shaped block 405 is arranged in the T-shaped groove 404, so that the sealing ring 402 is convenient to mount on the sliding seat 401, and the disassembly and replacement are also convenient. The sealing ring 402 and the T-shaped block 405 are integrally formed, and the outer diameter of the sealing ring 402 is the same as the inner diameter of the sliding seat 401, so that the sealing ring 402 and the sliding seat 401 are tightly attached together.
The sliding seat 401 is made of fluororubber, and the fluororubber has excellent high-temperature resistance, corrosion resistance and wear resistance, is suitable for high-pressure and high-temperature environments, and keeps the reliability and stability of the sealing structure 400.
The sealing ring 402 is made of nitrile rubber, and the nitrile rubber sealing ring has good oil resistance and wear resistance, so that the reliability of the sealing structure 400 is ensured.
As shown in fig. 1, a plurality of sealing structures 400 may be provided, and a more complete sealing barrier may be formed under the combined action of the plurality of sealing structures 400, so that the sealing performance between the contact base 100 and the cylinder 200 is improved, and in a high-pressure environment, the improvement of the sealing performance is helpful to prevent the leakage of sulfur hexafluoride gas, so as to ensure the normal operation of the circuit breaker. And the plurality of sealing structures 400 share the sealing task together, the load of each sealing structure 400 is reduced, which is helpful to improve the durability of the sealing structure 400 and prolong the service life of the circuit breaker.
As shown in fig. 3, the slide seat 401 is provided with a chamfer portion on a side thereof adjacent to the cylinder 200. The outer surface of the sliding seat 401 is provided with a plurality of grooves (not shown in the drawings) to improve the fit and sealing performance between the sliding seat 401 and the cylinder 200.
As shown in fig. 1, the cavity between the contact base 100 and the cylinder 200 forms a compressed air chamber, and sulfur hexafluoride gas is disposed inside the compressed air chamber. The sulfur hexafluoride gas has good electrical insulation performance and excellent arc extinguishing performance, the electric strength of the sulfur hexafluoride gas is 2.5 times of that of nitrogen gas under the same pressure, the breakdown voltage of the sulfur hexafluoride gas is 2.5 times of that of air, the arc extinguishing capability of the sulfur hexafluoride gas is 100 times of that of air, and the sulfur hexafluoride gas is a new generation super-high voltage insulating medium material superior to that between air and oil, and has good insulation performance and arc extinguishing performance.
In summary, the sealing structure 400 is disposed between the contact base 100 and the cylinder 200, and the sealing structure 400 can enhance the tightness between the contact base 100 and the cylinder 200, prevent sulfur hexafluoride gas from leaking from the gap between the contact base 100 and the cylinder 200, avoid affecting the breaking performance of the circuit breaker, and prevent external moisture, dust and other impurities from entering the cylinder 200.
The sealing washer 402 is fixed in the sliding seat 401, and the elasticity of sealing washer 402 can make sliding seat 401 closely laminate on the inner wall of cylinder 200, ensures seal structure 400's compactness and persistence, prevents the inside gaseous leakage of cylinder 200 or external impurity entering cylinder 200 in, and the setting of clamping ring 403 makes sliding seat 401 more stable, difficult emergence deformation, has further improved sealing performance.
It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the utility model as defined by the appended claims and their equivalents.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323373403.4U CN221783125U (en) | 2023-12-11 | 2023-12-11 | A sealing mechanism for a circuit breaker of a high voltage switch accessory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323373403.4U CN221783125U (en) | 2023-12-11 | 2023-12-11 | A sealing mechanism for a circuit breaker of a high voltage switch accessory |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221783125U true CN221783125U (en) | 2024-09-27 |
Family
ID=92825149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323373403.4U Active CN221783125U (en) | 2023-12-11 | 2023-12-11 | A sealing mechanism for a circuit breaker of a high voltage switch accessory |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221783125U (en) |
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2023
- 2023-12-11 CN CN202323373403.4U patent/CN221783125U/en active Active
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