CN210692421U - Shell assembly of vacuum arc-extinguishing chamber and vacuum arc-extinguishing chamber - Google Patents
Shell assembly of vacuum arc-extinguishing chamber and vacuum arc-extinguishing chamber Download PDFInfo
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- CN210692421U CN210692421U CN201921769077.XU CN201921769077U CN210692421U CN 210692421 U CN210692421 U CN 210692421U CN 201921769077 U CN201921769077 U CN 201921769077U CN 210692421 U CN210692421 U CN 210692421U
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Abstract
The utility model relates to a shell subassembly and vacuum interrupter of vacuum interrupter, the fixed spinning riveted structure that adopts of a shielding section of thick bamboo replace traditional welding process, simple process, the yields height. The connecting wall of the connecting ring is in micro-clearance fit with the opposite surface of the connecting section, so that the gap is reduced as much as possible, the shielding cylinder is prevented from inclining, and the coaxiality of the shielding cylinder and the ceramic shell is ensured. The ceramic shell, the shielding cylinder and the connecting ring are not interfered with each other, the falling position is guaranteed to be in place, no gap is formed basically, and the fastening of spinning riveting is guaranteed. In the utility model, the connecting wall of the connecting ring is provided with the chamfer of the arc transition, so that the interference of the tip end and the shielding cylinder is avoided, the connecting ring is not in place, the spinning riveting effect is poor, and the assembly is not stable; and can bear the holding down force when spinning riveting, protect the porcelain shell can not lead to mechanical damage because of the atress is too big. During implementation, the connecting ring can be processed by adopting a metal material, and compared with a porcelain shell, the size precision is easier to control, and the consistency of products is ensured.
Description
Technical Field
The utility model relates to a vacuum interrupter technical neighborhood, more specifically say, relate to a vacuum interrupter's shell subassembly to and a vacuum interrupter.
Background
The vacuum arc-extinguishing chamber, also known as a vacuum switch tube, is a core component of a medium-high voltage power switch, has the main functions of rapidly extinguishing arc and inhibiting current after a medium-high voltage circuit is cut off a power supply through excellent vacuum insulativity in the tube, avoids accidents and accidents, and is mainly applied to a power transmission and distribution control system of electric power.
The main components of the vacuum arc extinguish chamber comprise a contact, a conducting rod, a ceramic shell, a shielding cylinder and the like, wherein the shielding cylinder is fixed on a fixing rib of the ceramic shell. When the contacts are opened to generate electric arc, a large amount of metal vapor and liquid drops splash to the periphery of the vacuum arc-extinguishing chamber, and the electric arc products are deposited on the inner surface of the vacuum arc-extinguishing chamber to reduce the insulating strength of the vacuum arc-extinguishing chamber. The shielding cylinder of the vacuum arc-extinguishing chamber has the main functions of blocking the arc product and preventing the insulating shell from being polluted by the product. Therefore, the shielding cylinder plays an important role in the post-arc dielectric strength, recovery speed and breaking capacity of the arc extinguishing chamber.
In the prior art, a shielding cylinder is usually welded on a fixing rib of a ceramic shell, the fixing rib of the ceramic shell needs to be additionally coated and metalized, the process is complex, the shielding cylinder and the ceramic shell are directly brazed, the ceramic shell fixing rib is easily cracked due to different coefficients of thermal expansion of materials and large stress, the welding is not firm, and the shielding cylinder is easily caused to fall off and the product is scrapped.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide a vacuum interrupter's shell subassembly, adopt spinning riveted structure to realize the firm connection of a shielding section of thick bamboo to furthest guarantees that the porcelain shell does not receive the damage in process of production.
The technical scheme of the utility model as follows:
a shell assembly of a vacuum arc-extinguishing chamber comprises a tubular ceramic shell and a shielding cylinder, wherein a limiting bulge is arranged on the inner wall of the ceramic shell along the radial direction, one end of the shielding cylinder is a reducing connecting section, a connecting ring is sleeved outside the connecting section, and the connecting section is connected with the connecting ring to realize the fixation of the shielding cylinder in the ceramic shell; the inner side surface of the connecting wall of the connecting ring is opposite to the outer wall of the connecting section, straight walls are arranged along the axial direction, and the end part of the connecting section is connected with the connecting wall of the connecting ring through spinning riveting.
Preferably, the connecting wall of the connecting ring and the connecting section are in equidistant micro clearance fit.
Preferably, the end of the connecting section of the shielding cylinder is reserved for a length sufficient for spin riveting to cover from the end of the connecting wall of the connecting ring to the outside of the connecting wall, and the length of the cover to the outside of the connecting wall does not exceed 2 mm.
Preferably, before spin riveting, when the ceramic shell, the shielding cylinder and the connecting ring are assembled in place, the length difference h between the end of the connecting section and the end of the connecting wall is approximately equal to d +2mm, wherein d is the thickness of the connecting wall.
Preferably, the thickness of the connecting section of the shielding cylinder is 0.4mm-0.7 mm.
Preferably, the connecting wall of the connecting ring is chamfered in a circular arc transition towards the end angle of the connecting section.
Preferably, the abutting surface of the limiting protrusion facing the connecting ring and the abutting surface of the connecting ring are arranged to be planes, and the abutting surface of the connecting ring and the abutting surface of the limiting protrusion are arranged in a fitting mode.
Preferably, the connecting ring is a circular ring with an "L" -shaped cross section.
Preferably, the connection section of the shielding cylinder is excessively inclined through the inclined necking section, the surface of the limiting protrusion opposite to the inclined necking section is an inclined surface, and the inclined necking section of the shielding cylinder is attached to the inclined surface of the limiting protrusion.
The vacuum arc-extinguishing chamber comprises a shell assembly, a conducting rod, an upper sealing element and a lower sealing element, wherein the shell assembly, the conducting rod, the upper sealing element and the lower sealing element are assembled into a whole.
The utility model has the advantages as follows:
shell subassembly and vacuum interrupter of vacuum interrupter, to the fixed of a shielding section of thick bamboo, adopt spinning riveted structure to replace traditional welding process, simple process, the yields is high. The connecting wall of the connecting ring is in micro-clearance fit with the opposite surface of the connecting section, so that the gap is reduced as much as possible, the shielding cylinder is prevented from inclining, and the coaxiality of the shielding cylinder and the ceramic shell is ensured. The utility model discloses in, porcelain shell, a shielding section of thick bamboo and go-between mutually noninterfere guarantee that the position of falling targets in place, and porcelain shell, a shielding section of thick bamboo do not have the space basically with the go-between, guarantee the fastening of spinning riveting. The thickness and the length of the connecting section of the shielding cylinder for spin riveting are reasonable, so that spin riveting can be easily carried out, and sufficient riveting strength is ensured.
In the utility model, the connecting wall of the connecting ring is provided with the chamfer of the arc transition, so that the interference of the tip end and the shielding cylinder is avoided, the connecting ring is not in place, the spinning riveting effect is poor, and the assembly is not stable; and can bear the holding down force when spinning riveting, protect the porcelain shell can not lead to mechanical damage because of the atress is too big.
During implementation, the connecting ring can be processed by adopting a metal material, and compared with a porcelain shell, the size precision is easier to control, and the consistency of products is ensured.
Drawings
FIG. 1 is a schematic structural view of a housing assembly;
FIG. 2 is a cross-sectional view of the housing assembly;
fig. 3 is a partial enlarged view of a portion a of fig. 2;
FIG. 4 is a schematic view of the structure of the vacuum interrupter;
in the figure: 10 is a porcelain shell, 11 is a limit bulge, 111 is an abutting surface, 112 is an inclined surface, 20 is a shielding cylinder, 21 is a connecting section, 22 is an inclined necking section, 30 is a connecting ring, 31 is a connecting wall, 32 is an abutting surface, 33 is a chamfer, 40 is a conducting rod, 50 is an upper sealing element, and 60 is a lower sealing element.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The utility model discloses a solve the welding process operation that prior art exists complicated, exist quality hidden danger etc. not enough, provide a vacuum interrupter's shell subassembly to and vacuum interrupter based on this shell subassembly.
As shown in fig. 1, 2, and 3, the housing assembly of the vacuum interrupter includes a tubular ceramic shell 10 and a shielding cylinder 20, a limiting protrusion 11 is radially disposed on an inner wall of the ceramic shell 10, a diameter-reduced connecting section 21 is disposed at one end of the shielding cylinder 20, a connecting ring 30 is sleeved outside the connecting section 21, and the connecting section 21 is connected to the connecting ring 30 to fix the shielding cylinder 20 in the ceramic shell 10. During the assembly, the connecting section 21 passes spacing arch 11, and spacing arch 11 forms spacingly to a shielding section of thick bamboo 20, and go-between 30 establishes from the connecting section 21 of a shielding section of thick bamboo 20 cover, is connected connecting section 21 and go-between 30 again, and shielding section of thick bamboo 20 all forms fixed spacing in the upper and lower both sides of spacing arch 11, accomplishes the fixed of a shielding section of thick bamboo 20 in porcelain shell 10. In the present invention, the inner side surface of the connecting wall 31 of the connecting ring 30 is opposite to the outer wall of the connecting section 21, and is set as a straight wall along the axial direction, that is, the outer wall of the connecting section 21 of the shielding cylinder 20 forms a straight cylinder arranged along the axial direction, and at least within the height range of the connecting wall 31 of the connecting ring 30 along the axial direction, the straight wall has a smooth surface and no steps or recesses; the inner wall of the connecting wall 31 of the connecting ring 30 forms a straight cylinder arranged in the axial direction. The end of the connecting section 21 is connected to the connecting wall 31 of the connecting ring 30 by spin riveting. Through spinning riveting, the end of the connecting section 21 of the shielding cylinder 20 forms a turnover riveting edge, the connecting ring 30 is pressed on the limiting protrusion 11, and then the clamping effect is formed on the upper side and the lower side of the limiting protrusion 11 with the shielding cylinder 20, so that the shielding cylinder 20 is fixed in the porcelain shell 10. The utility model discloses in, the opposite face of the connecting wall 31 of go-between 30 and linkage segment 21 sets up to straight wall along axial direction, and then when the spinning riveting, can reduce the riveting neutral between go-between 30 and the linkage segment 21, causes shielding section of thick bamboo 20 to take place to incline and lead to shielding section of thick bamboo 20 and porcelain shell 10's axiality bad, cause withstand voltage bad problem when preventing to rivet. Wherein, spacing arch 11 can be around the breakpoint formula lug of a plurality of equipartition that radial periphery set up, also can be the annular protruding muscle of complete periphery. In this embodiment, the limiting protrusion 11 is a complete circumferential annular rib.
In this embodiment, the connecting wall 31 of the connecting ring 30 is in a micro-clearance fit with the connecting section 21 at equal intervals, so as to solve the problem of inclination of the shielding cylinder 20 during riveting as much as possible and ensure the coaxiality of the shielding cylinder 20 and the porcelain shell 10 to the maximum extent.
The end part of the connecting section 21 of the shielding cylinder 20 is used for spin riveting and is not suitable for being too long or too short; if the length is too long, the fitting with the spin riveting head is not good, and if the length is too short, the riveting amount is insufficient, and the shielding cylinder 20 cannot be hung on the connecting ring 30. In the present embodiment, the length of the end portion of the connecting section 21 of the shielding cylinder 20 reserved for spin riveting is sufficient to cover the end portion of the connecting wall 31 of the connecting ring 30 to the outer side of the connecting wall 31, and the length of the cover to the outer side of the connecting wall 31 does not exceed 2 mm. Specifically, when the porcelain shell 10, the shielding cylinder 20 and the connection ring 30 are assembled in place before spin riveting, the length difference h between the end of the connection section 21 and the end of the connection wall 31 is approximately equal to d +2mm, where d is the thickness of the connection wall 31. That is, after the porcelain shell 10, the shield cylinder 20 and the connection ring 30 are put in place, the distance from the end of the connection wall 31 to the end of the connection section 21 is approximately +2mm of the thickness of the connection wall 31.
Meanwhile, the thickness of the connecting section 21 of the shielding cylinder 20 for riveting is not too thin or too thick, if too thick, a large downward pressure is required, the operation is difficult during manual riveting, and if too thin, the single side processed by a supplier is easy to cause part turning breakage and easy to deform during turnover. In this embodiment, the thickness of the connecting section 21 of the shielding cylinder 20 is 0.4mm to 0.7 mm.
In the present embodiment, the connecting wall 31 of the connecting ring 30 is provided with a rounded transition chamfer 33 towards the end angle of the connecting section 21. On the one hand, the phenomenon that the connecting ring 30 does not fall in place due to interference of the tip end and the shielding cylinder 20 is avoided, and then a gap exists between the ceramic shell 10, the shielding cylinder 20 and the connecting ring 30, so that the riveting effect is poor, the riveting is not tight, and the ceramic shell 10, the shielding cylinder 20 and the connecting ring 30 shake up and down.
On the other hand, the chamfer 33 can be used for the lower pressure born during the transition spinning riveting, that is, when the connecting section 21 of the shielding cylinder 20 is spun and riveted on the connecting ring 30, the shielding cylinder 20 and the connecting ring 30 can bear an axial pressure, the connecting section 21 of the shielding cylinder 20 is subjected to force riveting deformation, the connecting ring 30 is buffered by the chamfer 33 after being stressed, and then the matching part of the porcelain shell 10 and the connecting ring 30 cannot be mechanically damaged due to overlarge stress, thereby playing a role in protecting the porcelain shell 10. Wherein the connection ring 30 serves as an intermediate member for transition connection during spin riveting. If the connecting ring 30 is not arranged, the downward pressure of the spin riveting is too large, and the pressure is directly acted on the porcelain shell 10, so that mechanical damage is easily generated, and microcracks/chips which are difficult to find are formed on the porcelain shell 10, and the product is poor. If the connection ring 30 is provided, the pressure is applied to the connection ring 30 without directly acting on the porcelain shell 10, thereby preventing the porcelain shell 10 from being mechanically damaged.
In this embodiment, the abutting surface 111 of the limiting protrusion 11 facing the connection ring 30 and the abutting surface 32 of the connection ring 30 are configured as a plane, and the abutting surface 32 of the connection ring 30 and the abutting surface 111 of the limiting protrusion 11 are configured in a fitting manner. Specifically, the connection ring 30 is a circular ring having an "L" shaped cross section. The connecting section 21 of the shielding cylinder 20 is excessively inclined through the inclined reducing section 22, the surface of the limiting protrusion 11 opposite to the inclined reducing section 22 is an inclined surface 112, and the inclined reducing section 22 of the shielding cylinder 20 is attached to the inclined surface 112 of the limiting protrusion 11. After the spinning riveting is completed, the connecting section 21 of the shielding cylinder 20 is pressed against the abutting surface 111 of the limiting protrusion 11 through the connecting ring 30, the inclined necking section 22 of the shielding cylinder 20 is pressed against the inclined surface 112 of the limiting protrusion 11 under the riveting action, so that the upper side and the lower side of the limiting protrusion 11 are clamped tightly, and the shielding cylinder 20 is fixed and is not easy to fall off.
During specific implementation, the ceramic shell 10 is difficult to accurately control the inner diameter of the limiting protrusion 11 due to the relationship between the material and the firing process, and when the connecting ring 30 is made of metal, such as stainless steel, the processing is more facilitated, and the accurate control of the size is ensured.
Based on the shell subassembly, the utility model discloses still provide a vacuum interrupter, as shown in fig. 4, include shell subassembly, conducting rod 40, last sealing member 50, lower sealing member 60, shell subassembly, conducting rod 40, last sealing member 50, lower sealing member 60 assemble as an organic whole.
The above embodiments are merely illustrative, and not restrictive, of the present invention. Changes, modifications, etc. to the above-described embodiments are intended to fall within the scope of the claims of the present invention, as long as they are in accordance with the technical spirit of the present invention.
Claims (10)
1. A shell assembly of a vacuum arc-extinguishing chamber comprises a tubular ceramic shell and a shielding cylinder, wherein a limiting bulge is arranged on the inner wall of the ceramic shell along the radial direction, one end of the shielding cylinder is a reducing connecting section, a connecting ring is sleeved outside the connecting section, and the connecting section is connected with the connecting ring to realize the fixation of the shielding cylinder in the ceramic shell; the connecting structure is characterized in that the inner side face of the connecting wall of the connecting ring is opposite to the outer wall of the connecting section, straight walls are arranged along the axial direction, and the end part of the connecting section is connected with the connecting wall of the connecting ring through spinning riveting.
2. The housing assembly of a vacuum interrupter as claimed in claim 1, wherein the connecting wall of the connecting ring is in equidistant micro clearance fit with the connecting section.
3. The housing assembly of a vacuum interrupter as claimed in claim 1, wherein the end of the connecting section of the shielding cylinder is reserved for a length sufficient for spin riveting to cover from the end of the connecting wall of the connecting ring to the outside of the connecting wall, and the length of the covering to the outside of the connecting wall does not exceed 2 mm.
4. The housing assembly of a vacuum interrupter as claimed in claim 3, wherein a length difference h ≈ d +2mm between an end of the connecting section and an end of the connecting wall when the ceramic case, the shielding cylinder and the connecting ring are assembled in place before spin riveting, wherein d is a thickness of the connecting wall.
5. The housing assembly of a vacuum interrupter as defined in claim 1 wherein the connecting section of the shielding can has a thickness of 0.4mm to 0.7 mm.
6. A housing assembly for a vacuum interrupter as claimed in claim 1, characterized in that the connecting wall of the connecting ring is provided with a rounded chamfer towards the end angle of the connecting section.
7. The shell assembly of the vacuum interrupter as claimed in claim 1, wherein the abutting surface of the limiting protrusion facing the connecting ring and the abutting surface of the connecting ring are disposed as a plane, and the abutting surface of the connecting ring and the abutting surface of the limiting protrusion are attached to each other.
8. The housing assembly of the vacuum interrupter as recited in claim 7, wherein the coupling ring is a circular ring with an "L" shaped cross section.
9. The housing assembly of the vacuum interrupter as claimed in claim 1, wherein the connecting section of the shielding cylinder forms an inclined transition through an inclined necking section, a surface of the limiting protrusion opposite to the inclined necking section is provided as an inclined surface, and the inclined necking section of the shielding cylinder is attached to the inclined surface of the limiting protrusion.
10. A vacuum interrupter comprising the housing assembly, the conductive rod, the upper sealing member, and the lower sealing member of any one of claims 1 to 9, wherein the housing assembly, the conductive rod, the upper sealing member, and the lower sealing member are integrally assembled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921769077.XU CN210692421U (en) | 2019-10-21 | 2019-10-21 | Shell assembly of vacuum arc-extinguishing chamber and vacuum arc-extinguishing chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921769077.XU CN210692421U (en) | 2019-10-21 | 2019-10-21 | Shell assembly of vacuum arc-extinguishing chamber and vacuum arc-extinguishing chamber |
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| Publication Number | Publication Date |
|---|---|
| CN210692421U true CN210692421U (en) | 2020-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921769077.XU Active CN210692421U (en) | 2019-10-21 | 2019-10-21 | Shell assembly of vacuum arc-extinguishing chamber and vacuum arc-extinguishing chamber |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112103128A (en) * | 2020-08-11 | 2020-12-18 | 平高集团有限公司 | Vacuum arc-extinguishing chamber cylinder, vacuum arc-extinguishing chamber shielding case and vacuum arc-extinguishing chamber |
-
2019
- 2019-10-21 CN CN201921769077.XU patent/CN210692421U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112103128A (en) * | 2020-08-11 | 2020-12-18 | 平高集团有限公司 | Vacuum arc-extinguishing chamber cylinder, vacuum arc-extinguishing chamber shielding case and vacuum arc-extinguishing chamber |
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