Environment-friendly load switch

Abstract

The utility model relates to an environment-friendly load switch, which comprises a mechanism frame, a main shaft, three insulators, three isolation knives, three groups of crank arm assemblies, a grounding contact assembly and three groups of static contact assemblies, the static contact assembly comprises a conductive busbar, a static contact, a vacuum arc-extinguishing chamber, a support frame arranged on the fixed beam, a conductive member which is rotatably arranged on the support frame and is electrically connected with the vacuum arc-extinguishing chamber, and a torsion spring arranged between the conductive member and the support frame. And the opening piece is rotatably arranged on the support frame and is used for driving a pull rod of the vacuum arc-extinguishing chamber to execute an opening action, when the isolation knife executes the opening action, the conductive piece acts along with the isolation knife and drives the opening piece to act, and the opening piece drives the pull rod of the vacuum arc-extinguishing chamber to execute the opening action. The high-voltage switch cabinet has the advantages of simple structure, stable and reliable performance, strong breaking capacity, small volume, good insulating property, high safety and modularization.

Description

TECHNICAL FIELD

[0001] The utility model relates to a load switch, in particular to an environmental protection load switch. BACKGROUND

[0002] The load switch can be used as a looped network power supply unit or terminal equipment, plays a role in distribution, control and protection of electric energy, and is widely used in wind power generation, city network construction and reconstruction engineering, industrial and mining enterprises, high-rise buildings and public facilities etc. At present, most load switches use sulfur hexafluoride gas (SF6) combined with arc extinguishing grid sheet to play the role of arc extinguishing. Once the sulfur hexafluoride gas leaks, not only the insulation capacity decreases, but also there are safety hazards and environmental impact. However, with the emphasis on environmental protection, the sulfur hexafluoride load switch has been gradually eliminated by users due to the disadvantage of the environmental unfriendly insulation medium. Therefore, the environmental protection load switch with environmental protection air as the insulation medium appears in the market, and thus the sulfur hexafluoride (SF6) load switch is gradually replaced by the environmental protection load switch. However, the structure design of the existing environmental protection load switch is relatively complex, the insulation performance is poor, and when the switch is opened, the vacuum arc extinguishing cannot be achieved, the arc extinguishing performance is unreliable, the breaking capacity is weak, and the safety is low. SUMMARY

[0003] The utility model aims at overcoming the defects of prior art, provides a kind of environmental protection load switch with simple structure, stable and reliable performance, strong breaking capacity, small volume, good insulation performance, high safety and modularization.

[0004] To achieve the above-mentioned purpose, the utility model adopts a kind of environmental protection load switch, including mechanism frame, main shaft being rotatably arranged on mechanism frame, three insulators being respectively arranged on mechanism frame, three isolation knives being rotatably arranged on the contact seat of three insulators, three groups of crank arm components being linked with main shaft and being used to drive three isolation knives to execute opening and closing actions, grounding contact assembly being arranged on mechanism frame and being matched with three isolation knives, three groups of static contact assembly being arranged on mechanism frame and being matched with three isolation knives, the static contact assembly includes the conducting busbar being arranged on the fixed beam of mechanism frame, the static contact being arranged on one end of conducting busbar and being matched with isolation knife, the vacuum arc chamber being arranged on conducting busbar, the support frame being arranged on fixed beam, the conducting part being rotatably arranged on support frame and being electrically connected with vacuum arc chamber, the torsion spring being arranged between conducting part and support frame, the opening piece being rotatably arranged on support frame and being used to drive the pull rod of vacuum arc chamber to execute opening action, when isolation knife executes opening action, conducting part moves with isolation knife and drives opening piece to act, and opening piece drives the pull rod of vacuum arc chamber to execute opening action.

[0005] The environmental protection load switch has the advantages of simple structure, stable and reliable performance, strong breaking capacity, small size, good insulation performance, high safety and modularity.

[0006] In particular, the conductive part is provided with a rotating shaft rotatably arranged on the support frame, two conductive sheets rotatably arranged on the rotating shaft and matched with the isolating knife, and a cam rotatably arranged on the rotating shaft and matched with the opening knife. One end of each of the two conductive sheets is provided with a conductive part extending on both sides of the static contact and matched with the isolating knife. When the isolating knife performs the opening action, the two conductive sheets move with the isolating knife and drive the cam to move, and the cam drives the opening knife to perform the opening action. The isolating knife drives the two conductive sheets to move, the two conductive sheets drive the rotating shaft to rotate, the rotating shaft drives the cam to move, the cam drives the opening knife to move, and the opening knife drives the pull rod to perform the opening action, so as to realize the vacuum arc breaking of the environmental protection load switch, and the arc extinguishing performance and the insulation performance are better.

[0007] In particular, the conductive part is provided with a rotating shaft rotatably arranged on the support frame, two conductive sheets rotatably arranged on the rotating shaft and matched with the isolating knife, and a cam rotatably arranged on the rotating shaft and matched with the opening knife. One end of each of the two conductive sheets is provided with a conductive part extending on both sides of the static contact and matched with the isolating knife. When the isolating knife performs the opening action, the two conductive sheets move with the isolating knife and drive the cam to move, and the cam drives the opening knife to perform the opening action. The isolating knife drives the two conductive sheets to move, the two conductive sheets drive the rotating shaft to rotate, the rotating shaft drives the cam to move, the cam drives the opening knife to move, and the opening knife drives the pull rod to perform the opening action, so as to realize the vacuum arc breaking of the environmental protection load switch, and the arc extinguishing performance and the insulation performance are better.

[0008] In particular, the rotating shaft is rotatably arranged on the support frame, and the torsion spring is rotatably arranged on the rotating shaft. One end of the torsion spring is clamped on the limiting plate, and the other end of the torsion spring is clamped on the support frame. The torsion spring is clamped between the support frame and the limiting plate, so that the rotating shaft can be reliably reset, and the working reliability of the environmental protection load switch is improved.

[0009] In particular, the two conductive sheets are provided with a conductive bolt, and the conductive bolt is connected with the pull rod through a soft connection. The two conductive sheets are connected with the pull rod of the vacuum arc chamber through the soft connection, so that the electrical connection between the two conductive sheets and the pull rod is more reliable.

[0010] Particularly, the said opening and closing member comprises a support shaft rotatably arranged on the mechanism frame, two opening and closing pieces rotatably arranged on the support shaft, a driving shaft arranged on one end of the two opening and closing pieces and matched with the cam, and a latch arranged between the other end of the two opening and closing pieces and the pull rod, wherein the driving shaft is provided with a roller matched with the cam, and the cam is provided with an arc-shaped recess matched with the roller, and when the said isolation knife performs the opening and closing action, the two conductive pieces move with the isolation knife and drive the cam to move, the arc-shaped recess of the cam is buckled on the roller, and the linkage of the two opening and closing pieces and the cam is formed, the conductive piece drives the roller of the opening and closing member to move, the roller drives the two opening and closing pieces to rotate, and the two opening and closing pieces pull the pull rod to perform the opening and closing action, so that the opening and closing of the vacuum arc-extinguishing chamber is realized, and the transmission of the conductive piece and the opening and closing member is more reliable.

[0011] Particularly, the said fixed beam is provided with an insulating isolation plate arranged between the three groups of static contact assemblies, respectively.

[0012] Particularly, the said grounding contact assembly comprises a grounding support plate arranged on the mechanism frame, a grounding conductive row arranged on the grounding support plate, and three grounding contacts arranged on the grounding conductive row and matched with the three isolation knives, respectively, wherein the grounding support plate is provided with three buffer pad plates matched with the three isolation knives at positions corresponding to the three grounding contacts, respectively.

[0013] Particularly, the said grounding support plate is provided with a support plate, the support plate is provided with three protective covers at positions corresponding to the three grounding contacts, respectively, the three protective covers extend from the grounding contacts to the conductive pieces, and the protective covers are provided with insulating isolation grooves matched with the movement tracks of the isolation knives. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a perspective view of an embodiment of the utility model.

[0015] Figure 2 It is an exploded view of an embodiment of the utility model.

[0016] Figure 3 It is a structure diagram of a closing process of an embodiment of the utility model.

[0017] Figure 4 It is a structure diagram of an opening process of an embodiment of the utility model.

[0018] Figure 5 A perspective view of a stationary contact assembly according to an embodiment of the present application. DETAILED DESCRIPTION

[0019] As Figures 1 to 5The utility model discloses an environmental protection load switch, including mechanism frame 10, the main shaft 11 of rotation setting on mechanism frame 10, three insulators 12 of setting on mechanism frame 10 respectively, three isolation knives 14 of rotation setting on the contact seat 13 of three insulators 12 respectively, three groups of crank arm assemblies 15 with main shaft 10 linkage cooperation and for driving three isolation knives 14 to carry out the switching-on and switching-off action of execution, the grounding contact assembly 20 of setting on mechanism frame 10 and with three isolation knives 14 cooperation, three groups of static contact assembly 30 of setting on mechanism frame 10 and with three isolation knives 14 cooperation, static contact assembly 30 including the fixed beam 101 of setting on mechanism frame 10's conducting busbar 31, setting on conducting busbar 31 one end and with the static contact 32 of isolation knife 14 cooperation, the vacuum arc-extinguishing chamber 33 of setting on conducting busbar 31, the support frame 34 of setting on fixed beam 101, the electrically conductive piece 35 of rotation setting on support frame 34 and with vacuum arc-extinguishing chamber 33 electric connection, the torsion spring 36 of setting between electrically conductive piece 35 and support frame 34, the switching-off piece 37 of rotation setting on support frame 34 and for driving vacuum arc-extinguishing chamber 33's pull rod 331 carries out the switching-off action of execution, when isolation knife 14 carries out the switching-off action, electrically conductive piece 35 with isolation knife 14 action and drive switching-off piece 37 action, switching-off piece 37 drives vacuum arc-extinguishing chamber 33's pull rod 331 carries out the switching-off action.The disconnecting piece 37 comprises a support shaft 371 rotatably arranged on the mechanism frame 10, two disconnecting pieces 372 rotatably arranged on the support shaft 371, a driving shaft 373 arranged on one end of the two disconnecting pieces 372 and matched with the cam 353, a pin 374 arranged between the other end of the two disconnecting pieces 372 and the pull rod 331, the driving shaft 373 is provided with a roller 375 matched with the cam 353, the cam 353 is provided with an arc concave groove 3531 matched with the roller 375, when the isolation knife 14 performs the disconnecting action, the two conductive pieces 351 act with the isolation knife 14 and drive the cam 353 to act, the arc concave groove 3531 of the cam 353 is buckled on the roller 375, and the linkage of the two disconnecting pieces 372 and the cam 353 is formed. The conductive piece drives the roller of the disconnecting piece to act, the roller drives the two disconnecting pieces to rotate, the two disconnecting pieces pull the pull rod to perform the disconnecting action, so as to realize the disconnecting of the vacuum arc-extinguishing chamber. Thus, the transmission of the conductive piece and the disconnecting piece can be more reliable. The rotating shaft 351 is linked with a limiting plate 354, the torsion spring 36 is sleeved on the rotating shaft 351, one end of the torsion spring 36 is clamped on the limiting plate 354, and the other end of the torsion spring 36 is clamped on the support frame 34. The torsion spring is clamped between the support frame and the limiting plate, so that the rotating shaft can be reliably reset, which is beneficial to improve the working reliability of the environmental load switch. The two conductive pieces 352 are provided with a conductive bolt 3524, and the conductive bolt 3524 is connected with the soft connection 38 between the pull rod 331. The two conductive pieces are connected with the pull rod of the vacuum arc-extinguishing chamber through the soft connection, so that the electrical connection of the two conductive pieces and the pull rod can be more reliable. The fixed beam 101 is respectively provided with insulating isolation plates 102 arranged between the three groups of static contact assemblies 30. The insulating isolation plates can increase the insulation distance of the three groups of static contact assemblies, and the interphase insulation performance is better.

[0020] As Figure 2 , 3As shown in Figs. 1-4, the grounding contact assembly 20 comprises a grounding support plate 21 arranged on the mechanism frame 10, a grounding conductive row 22 arranged on the grounding support plate 21, three grounding contacts 23 respectively arranged on the grounding conductive row 22 and matched with the three isolation knives 14, and three buffer pad plates 24 respectively arranged on the grounding support plate 21 and matched with the three isolation knives 14. The grounding contact assembly adopts a modular structure design, can realize the modular assembly of the environmental protection load switch, and the buffer pad plates can buffer the isolation knives, so that the isolation knives and the grounding contacts can be reliably contacted. The grounding support plate 21 is provided with a support plate 25, the support plate 25 is provided with three protective covers 26 respectively corresponding to the three grounding contacts 23, the three protective covers 26 extend from the grounding contacts 23 to the conductive member 35, and the protective covers 26 are provided with insulation isolation grooves 261 matched with the movement tracks of the isolation knives 14. The three protective covers can increase the insulation distance between the three isolation knives, and the interphase insulation performance is better.

[0021] The static contact assembly of the environmental protection load switch adopts a modular structure design, the structure design is compact, and the volume is smaller. When the switch is closed, the vacuum arc-extinguishing chamber is in a normally closed state, the main shaft drives the isolation knife to act, the isolation knife first drives the conductive member to act (the isolation knife first contacts the conductive member), and then the isolation knife contacts the static contact, so that the isolation knife and the static contact are connected. When the switch is opened, the main shaft drives the isolation knife to perform the opening action, when the isolation knife contacts the conductive member, the conductive member connects the power source between the isolation knife and the vacuum arc-extinguishing chamber, when the isolation knife drives the conductive member to act (the isolation knife and the static contact are separated), the conductive member drives the opening member to act, the opening member pulls the pull rod of the vacuum arc-extinguishing chamber to perform the opening action, so that the vacuum arc-extinguishing opening of the environmental protection load switch is realized, the arc-extinguishing performance is better, the insulation performance is better, and the safety is higher. Therefore, the environmental protection load switch has the advantages of simple structure, stable and reliable performance, strong breaking capacity, small volume, good insulation performance, high safety and modularity.

Claims

1. An environmentally friendly load switch, comprising a mechanism frame, a main shaft rotatably arranged on the mechanism frame, three insulators respectively arranged on the mechanism frame, three isolation blades respectively rotatably arranged on contact seat of the three insulators, three sets of crank arm assemblies in linkage cooperation with the main shaft and used for driving the three isolation blades to perform opening and closing actions, a grounding contact assembly arranged on the mechanism frame and cooperating with the three isolation blades, and three sets of static contact assemblies arranged on the mechanism frame and cooperating with the three isolation blades, characterized in that: The static contact assembly comprises a conductive busbar arranged on a fixed beam of a mechanism frame, a static contact arranged on one end of the conductive busbar and matched with an isolation knife, a vacuum arc-extinguishing chamber arranged on the conductive busbar, a support frame arranged on the fixed beam, a conductive part rotatably arranged on the support frame and electrically connected with the vacuum arc-extinguishing chamber, a torsion spring arranged between the conductive part and the support frame, and a split blade rotatably arranged on the support frame and used for driving the vacuum arc-extinguishing chamber to perform a split action. ​ 2. The environmentally friendly load switch of claim 1, wherein: The conductive part comprises a rotating shaft rotatably arranged on the support frame, two conductive sheets rotatably arranged on the rotating shaft and matched with the isolation knife, and a cam rotatably arranged on the rotating shaft and matched with the split blade.

3. The environmentally friendly load switch of claim 2, wherein: The two conductive sheets are provided with conductive parts on one end and extended on both sides of the static contact and matched with the isolation knife.

4. The environmentally friendly load switch according to claim 2 or 3, characterized in that: The rotating shaft is provided with a limiting plate, the torsion spring is sleeved on the rotating shaft, one end of the torsion spring is clamped on the limiting plate, and the other end of the torsion spring is clamped on the support frame.

5. The environmentally friendly load switch according to claim 2 or 3, characterized in that: The two conductive sheets are provided with a conductive bolt, and the conductive bolt is connected with the pull rod through a flexible connection.

6. The environmentally friendly load switch according to claim 2 or 3, characterized in that: The split blade comprises a support shaft rotatably arranged on the mechanism frame, two split blades rotatably arranged on the support shaft, a driving shaft arranged on one end of the two split blades and matched with the cam, and a latch arranged between the other end of the two split blades and the pull rod.

7. The environmentally friendly load switch according to claim 1 or 2, characterized in that: The fixed beam is provided with insulating isolation plates arranged between three groups of static contact assemblies.

8. The environmentally friendly load switch according to claim 1 or 2, characterized in that: The grounding contact assembly comprises a grounding support plate arranged on the mechanism frame, a grounding conductive busbar arranged on the grounding support plate, and three grounding contacts arranged on the grounding conductive busbar and matched with three isolation knives.

9. The environmentally friendly load switch of claim 8, wherein: The grounding support plate is provided with a support plate, the support plate is provided with three protective covers corresponding to the three grounding contacts, the three protective covers extend from the grounding contacts to the conductive parts, and the protective covers are provided with insulating isolation grooves matched with the movement tracks of the isolation knives.

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