CN213877928U - Load switch device - Google Patents
Load switch device Download PDFInfo
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- CN213877928U CN213877928U CN202120093204.XU CN202120093204U CN213877928U CN 213877928 U CN213877928 U CN 213877928U CN 202120093204 U CN202120093204 U CN 202120093204U CN 213877928 U CN213877928 U CN 213877928U
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- lower contact
- piston rod
- load switch
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Abstract
The utility model discloses a load switch equipment is including can fixing the last contact base on the box wall, install the quiet arc contact at last contact base in, can fix the lower contact base on the box wall, support insulator, be fixed in the piston rod on the support insulator, the current-conducting tube of cover setting at piston rod periphery, install the moving arc contact at the current-conducting tube top, insulating turning arm, ground contact and be located the lower contact base shield plate of ground contact both sides. The lower contact seat and the upper contact seat are arranged oppositely, and two notches which are mutually penetrated are formed in the side surface of the piston rod. The conductive tube penetrates through the lower contact base. The insulating crank arm penetrates through the two notches through a pin shaft to be connected with the lower end of the conductive tube, and the insulating crank arm can drive the pin shaft to drive the conductive tube to move up and down along the piston rod, so that the moving arc contact is in electrical contact with or separated from the static arc contact. The two lower contact base shielding plates are arranged on the lower contact bases, the electric field of the contact can be uniformly grounded, and the lower contact base shielding plates are oval.
Description
Technical Field
The disclosure relates to the technical field of power equipment, in particular to load switch equipment.
Background
With the enlargement of the installed scale of the national wind power generation, the single-machine capacity of the fan gradually develops to large scale and high power, and the machine set of 2MW and above gradually becomes a mainstream machine type. Most of the boosting transformers of the units of 2MW and above are arranged in a fan cabin or a tower drum of the fan, the outlet voltage of the side of the tower drum of the fan is 35kV, and switching equipment, namely 40.5kV load switch equipment, needs to be arranged in the tower drum of the fan according to the requirement of transformer capacity protection configuration. And under the high-voltage condition, the electric field distribution in the load switch equipment is extremely uneven, and the insulation strength is weak. In the conventional technology, the insulation performance is mainly satisfied by increasing the electrical gap and compounding the insulation. However, due to the fact that the composite insulating material is possibly unqualified, certain potential safety hazards exist, the size of the composite insulating material is inevitably increased by increasing the electrical clearance, the composite insulating material is limited by the size of a wind turbine tower cylinder door and the narrow space inside a wind turbine tower cylinder, and the design requirement for miniaturization of wind power occasions is not met.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem of non-uniform electric field distribution for high voltage load switching devices existing in the related art, the present disclosure provides a load switching device that can improve electric field distribution inside the load switching device and meet design requirements for miniaturization.
The present disclosure provides a load switch apparatus, comprising:
the upper contact base can be fixed on the wall of the box body of the load switch equipment;
the static arc contact is arranged in the upper contact seat;
the lower contact seat is arranged opposite to the upper contact seat and can be fixed on the wall of the box body of the load switch equipment;
a support insulator fixable to a wall of the tank of the load switchgear;
the bottom end of the piston rod is fixed on the supporting insulator, and two notches which penetrate through each other are formed in the side surface of the piston rod;
the conductive tube is sleeved on the periphery of the piston rod and penetrates through the lower contact seat;
the moving arc contact is fixedly arranged on the top of the conductive tube penetrating out of the lower contact seat;
the insulating crank arm penetrates through the two notches through a pin shaft and is connected with the lower end of the conductive tube, and the insulating crank arm can drive the pin shaft to drive the conductive tube to move up and down along the piston rod so as to enable the moving arc contact and the static arc contact to be in electric contact or separated;
the grounding contact is arranged on the lower contact seat; and
the two lower contact base shielding plates are arranged on the lower contact bases and are respectively positioned on two sides of the grounding contact so as to homogenize the electric field of the grounding contact, and the lower contact base shielding plates are oval.
Optionally, the two opposite surfaces of the lower contact base shielding plates are recessed to form a groove, so that the distance between the two lower contact base shielding plates is increased.
Optionally, two touch a shield panel down with touch down and connect through first fixed plate between the seat, first fixed plate include the web and with two pterygoid laminas that the web is connected, the web with touch down the seat and connect, two in the pterygoid lamina each pass through the second fixed plate and one touch down the shield panel and connect, the second fixed plate is fixed in on the diapire of recess.
Optionally, the long axes of the two lower contact base shielding plates are parallel to the length direction of the ground contact.
Optionally, the piston rod is fixed to the supporting insulator through a metal fastener, piston rod shielding plates are arranged on two sides of the metal fastener, and the piston rod shielding plates are oval.
Optionally, the opposite surfaces of the two piston rod shielding plates are both recessed to form a shielding groove, so as to increase the distance between the two piston rod shielding plates.
Optionally, two the piston rod shield plate is fixed in through first shielding fixed plate on the support insulator, first shielding fixed plate include the shielding web and with two shielding pterygoid laminas that the shielding web is connected, the shielding web with the support insulator is connected, two in the shielding pterygoid lamina each pass through second shielding fixed plate and one the piston rod shield plate is connected, second shielding fixed plate is fixed in on the diapire of shielding recess.
Optionally, the long axes of the two piston rod shielding plates are perpendicular to the fixing direction of the metal fastener.
Optionally, the load switch device further includes an upper contact base shielding case, and the stationary arc contact is covered in the upper contact base shielding case.
Optionally, the load switch device further comprises a lower contact base shielding cover, the lower contact base shielding cover is connected and fixed to the lower contact base, and when the load switch device is switched off, the movable arc contact is covered in the lower contact base shielding cover.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
the utility model provides a load switch equipment is including can fixing the last contact base on the box wall, install the quiet arc contact at last contact base in, can fix the lower contact base on the box wall, support insulator, be fixed in the piston rod on the support insulator, the current-conducting tube of cover establishing in piston rod periphery, install in the moving arc contact on current-conducting tube top, insulating turning arm, ground contact and be located the lower contact base shield plate of ground contact both sides. The lower contact seat and the upper contact seat are arranged oppositely, and two notches which are mutually penetrated are formed in the side surface of the piston rod. The conductive tube penetrates through the lower contact base. The insulating connecting lever penetrates through the two notches through a pin shaft to be connected with the lower end of the conductive tube, and the insulating connecting lever can drive the pin shaft to drive the conductive tube to move up and down along the piston rod, so that the moving arc contact is in electrical contact with or separated from the static arc contact. The two lower contact base shielding plates are arranged on the lower contact bases, the electric field of the contact can be uniformly grounded, and the lower contact base shielding plates are oval. So, this disclosed load switch equipment sets up a lower touch multitouch shield plate respectively in ground contact's both sides, and should touch multitouch shield plate for platelike and be oval, the electric field of ground contact both sides can be even, reduces the fault rate of load switch long-term operation in-process, has avoided the electric field too to concentrate and punctures down the touch multitouch simultaneously, has strengthened the insulating effect of this lower touch multitouch, has improved insulating reliability. Compared with the mode that satisfies the insulating properties through increasing electric clearance and compound insulating among the traditional art, this disclosure has reduced the volume, satisfies the miniaturized requirement of wind-powered electricity generation occasion.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a cross-sectional view of a load switch apparatus shown in an open state according to an exemplary embodiment.
Fig. 2 is a cross-sectional view illustrating a load switch of a load switching apparatus in a closed state according to an exemplary embodiment.
Fig. 3 is a front view of a load switch of the load switch apparatus shown in an open state, according to an example embodiment.
Detailed Description
For further explanation of the principles and construction of the present disclosure, reference will now be made in detail to the preferred embodiments of the present disclosure, which are illustrated in the accompanying drawings.
As shown in fig. 1 and 2, the present disclosure provides a load switch apparatus, which includes a box (not shown) and a load switch 10 installed in the box, where the load switch 10 includes an upper contact base 11 capable of being fixed on a wall of the box, a static arc contact 12 installed on the upper contact base 11, a lower contact base 13 capable of being fixed on the wall of the box, a support insulator 14, a piston rod 15 fixed on the support insulator 14, a conductive tube 16 sleeved on an outer periphery of the piston rod 15, a dynamic arc contact 17 installed at a top end of the conductive tube 16, an insulating crank arm 18 driving the conductive tube 16 to move away from or close to the static arc contact 12, a ground contact 19, and lower contact base shielding plates 21 located at two sides of the ground contact 19.
The upper contact base 11 may be mounted to the wall of the tank by means of a bracket 111. An inner cavity which is through up and down is arranged in the upper contact seat 11, the static arc contact 12 penetrates through the inner cavity, and the upper end of the static arc contact is connected and fixed on the upper contact seat 11 through a screw thread.
The lower end of the upper contact base 11 is provided with an upper contact base shielding cover 23, and the tip of the lower end of the static arc contact 12 exceeds the upper contact base 11 and is covered in the upper contact base shielding cover 23. An opening is provided on the lower end surface of the upper contact base shield 23 for the moving arc contact 17 to pass through for electrical connection with the stationary arc contact 12.
The lower contact base 13 is fixedly connected to the wall of the tank through a lower contact base mounting bracket 131, and is arranged opposite to the upper contact base 11. The lower contact base 13 has an inner cavity penetrating up and down.
The supporting insulator 14 is fixed on the wall of the box, the bottom end of the piston rod 15 is mounted on the supporting insulator 14 by a metal fastener 141 such as a screw, and the top end of the piston rod extends into the inner cavity of the lower contact base 13. The piston rod 15 extends from the support insulator 14 in the direction of the lower contact base 13. The side surface of the piston rod 15 is opened with two notches 151 penetrating each other, and the notches 151 extend from the vicinity above the support insulator 14 to below the lower contact base 13.
The conductive tube 16 is sleeved on the outer periphery of the piston rod 15 and can move up and down along the piston rod 15, and the top end thereof penetrates through the lower contact base 13 and protrudes out of the lower contact base 13.
The moving arc contact 17 is fixedly installed on the top of the conductive tube 16 penetrating out of the lower contact base 13 and can move up and down along with the conductive tube 16. In order to avoid the electric field around the moving arc contact 17 from being too concentrated, a lower contact base shielding cover 24 is sleeved on the periphery of the moving arc contact 17 to homogenize the electric field. The lower contact shield 24 is fixedly coupled to the lower contact 13, for example, the lower contact shield 24 is fixed to the lower contact 13 by a screw thread. When the load switch device is in an opening state, the movable arc contact 17 is covered in the lower contact base shielding cover 24.
One end of the insulating crank arm 18 penetrates through the two notches 151 through the pin shaft 181 to be connected with the lower end of the conductive tube 16, the other end of the insulating crank arm 18 is connected with the operating shaft 182, and under the driving of the operating shaft 182, the insulating crank arm 18 can drive the pin shaft 181 to drive the conductive tube 16 to move up and down along the piston rod 16, so that the moving arc contact 17 is in electrical contact with or separated from the static arc contact 12.
The ground contact 19 is mounted on the lower contact base 13 and fixed by a metal fastener such as a screw or a bolt. The ground contact 19 has a tip portion 191, and electric field concentration is easily caused at the tip portion 191.
The two lower contact base shielding plates 21 are mounted on the lower contact base 13 and located on two sides of the ground contact 19, respectively, and the ground contact 21 is sandwiched, so that an electric field around the ground contact 19 is distributed on the surfaces of the two lower contact base shielding plates 21, thereby reducing electric field concentration and improving electric field distribution. The lower contact base shielding plate 21 is oval and has two circular ends, so that the concentration of electric fields can be further reduced.
So, this disclosed load switch equipment sets up touch pad shield plate 21 once respectively in ground contact's both sides, and this touch pad shield plate 21 be platelike and be oval, can the electric field of even ground contact both sides, reduces the fault rate of load switch long-term service in-process, has avoided the electric field too to concentrate and punctures touch pad 13 down simultaneously, has strengthened the insulating effect of touch pad 13 down, has improved insulating reliability. Compared with the mode that satisfies the insulating properties through increasing electric clearance and compound insulating among the traditional art, this disclosure has reduced the volume, satisfies the miniaturized requirement of wind-powered electricity generation occasion.
The opposite surfaces of the two lower contact seat shielding plates 21 are recessed to form a groove 211, so that the distance between the two lower contact seat shielding plates 21 is increased, and the thickness is reduced. The recess 211 has a bottom wall which does not penetrate both surfaces of the lower contact shield 21.
The two lower contact seat shielding plates 21 are connected to the lower contact seat 13 through a first fixing plate 212, and the first fixing plate 212 includes a web and two wing plates connected to the web and formed by extending end portions of the web in the same direction. The web is connected to the lower contact base 13, each of the two wing plates is connected to a lower contact base shielding plate 21 through a second fixing plate 213, and the second fixing plate 213 is fixed to the bottom wall of the recess 211 through a fastening member such as a screw.
The two lower contact shield plates 21 are arranged vertically with respect to the ground contact 19, that is, the long axis of the lower contact shield plate 21 is parallel to the longitudinal direction of the ground contact 19, so that the two lower contact shield plates 21 sandwich the ground contact 19 therebetween as much as possible.
Further, the piston rod shielding plates 22 are disposed on two sides of the metal fastening member 141, and the electric field around the metal fastening member 141 can be dispersed on the surface of the piston rod shielding plate 22, so that the electric field at the bottom end of the piston rod 15 can be improved, the electric field can be prevented from being concentrated to break through the supporting insulator 14, and the insulation effect of the supporting insulator 14 can be enhanced.
The piston rod shielding plate 22 is oval as a whole, and the two ends are arc-shaped, so that the concentration of an electric field can be reduced.
The opposite surfaces of the two piston rod shielding plates 22 are recessed to form a shielding groove, so that the distance between the two piston rod shielding plates 22 is increased, and the thickness is reduced.
Referring to fig. 3, the two piston rod shielding plates 22 are fixed on the supporting insulator 14 by the first shielding fixing plate 222, and the first shielding fixing plate 222 includes a shielding web and two shielding wing plates connected to the shielding web. The shielding web is connected to the supporting insulator 14, each of the two shielding flanges is connected to a piston rod shielding plate 22 through a second shielding fixing plate, and the second shielding fixing plate is fixed to the bottom wall of the shielding groove.
The two piston rod shielding plates 22 are disposed flatly with respect to the metal fastening member 141, that is, the long axis of the piston rod shielding plate 22 is perpendicular to the fixing direction of the metal fastening member 141, so that the two metal fastening members 141 can be sandwiched between the two piston rod shielding plates 22, and the electric field concentration can be reduced as much as possible.
The load switch apparatus further includes a plurality of load switches 10 to be applied to control of different phase currents. As shown in fig. 3, the load switch apparatus includes 3 load switches 10, which are applicable to control of three-phase current.
The above description is only for the purpose of illustrating the preferred embodiments of the present disclosure and is not to be construed as limiting the scope of the present disclosure, but rather is intended to cover all equivalent structural changes made by applying the teachings of the present disclosure to the accompanying drawings.
Claims (10)
1. A load switching device, comprising:
the upper contact base can be fixed on the wall of the box body of the load switch equipment;
the static arc contact is arranged in the upper contact seat;
the lower contact seat is arranged opposite to the upper contact seat and can be fixed on the wall of the box body of the load switch equipment;
a support insulator fixable to a wall of the tank of the load switchgear;
the bottom end of the piston rod is fixed on the supporting insulator, and two notches which penetrate through each other are formed in the side surface of the piston rod;
the conductive tube is sleeved on the periphery of the piston rod and penetrates through the lower contact seat;
the moving arc contact is fixedly arranged on the top of the conductive tube penetrating out of the lower contact seat;
the insulating crank arm penetrates through the two notches through a pin shaft and is connected with the lower end of the conductive tube, and the insulating crank arm can drive the pin shaft to drive the conductive tube to move up and down along the piston rod so as to enable the moving arc contact and the static arc contact to be in electric contact or separated;
the grounding contact is arranged on the lower contact seat; and
the two lower contact base shielding plates are arranged on the lower contact bases and are respectively positioned on two sides of the grounding contact so as to homogenize the electric field of the grounding contact, and the lower contact base shielding plates are oval.
2. The load switch apparatus according to claim 1, wherein the opposing surfaces of said lower contact shield plates are recessed to form a recess to increase the distance between said lower contact shield plates.
3. The load switch apparatus according to claim 2, wherein the two lower contact shielding plates are connected to the lower contact through a first fixing plate, the first fixing plate includes a web plate and two wing plates connected to the web plate, the web plate is connected to the lower contact, each of the two wing plates is connected to one of the lower contact shielding plates through a second fixing plate, and the second fixing plate is fixed to the bottom wall of the recess.
4. The load switch apparatus of claim 1, wherein the major axes of the lower contact shield plates are parallel to the length direction of the ground contact.
5. The load switch apparatus according to claim 1, wherein the piston rod is fixed to the support insulator by a metal fastener, and a piston rod shield plate is provided on both sides of the metal fastener, the piston rod shield plate being elliptical.
6. The load switch apparatus according to claim 5, wherein the opposite surfaces of the two piston rod shielding plates are recessed to form a shielding recess, so as to increase the distance between the two piston rod shielding plates.
7. The load switch apparatus according to claim 6, wherein the two piston rod shielding plates are fixed on the supporting insulator by a first shielding fixing plate, the first shielding fixing plate comprises a shielding web and two shielding wing plates connected with the shielding web, the shielding web is connected with the supporting insulator, each of the two shielding wing plates is connected with one piston rod shielding plate by a second shielding fixing plate, and the second shielding fixing plate is fixed on the bottom wall of the shielding groove.
8. The load switch apparatus according to claim 5, wherein the long axes of the two piston rod shield plates are perpendicular to the fixing direction of the metal fastener.
9. The load switching device of claim 1, further comprising an upper contact housing and housing the stationary arcing contact within the upper contact housing.
10. The load switch apparatus according to claim 1, further comprising a lower contact base shield, wherein the lower contact base shield is fixedly connected to the lower contact base, and the movable arcing contact is housed in the lower contact base shield when the load switch apparatus is opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120093204.XU CN213877928U (en) | 2021-01-14 | 2021-01-14 | Load switch device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120093204.XU CN213877928U (en) | 2021-01-14 | 2021-01-14 | Load switch device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213877928U true CN213877928U (en) | 2021-08-03 |
Family
ID=77046108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120093204.XU Active CN213877928U (en) | 2021-01-14 | 2021-01-14 | Load switch device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213877928U (en) |
-
2021
- 2021-01-14 CN CN202120093204.XU patent/CN213877928U/en active Active
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