Vacuum switch for source network load storage switching

Abstract

The utility model discloses a vacuum switch for source network load storage switching. The vacuum switch comprises an upper end cover, a shell, a lower end cover, a steel cover, a static conducting rod, two contact units, a movable conducting rod, a third elastic piece, a first elastic piece and a second elastic piece, the lower end of the static conducting rod is connected to the contact unit through a first elastic piece, and the upper end of the movable conducting rod is connected to the contact unit through a second elastic piece. According to the vacuum switch provided by the utility model, through the elastic connection between the conducting rod and the contact, after closing arc extinguishing is completed, the conducting rod continues to move relatively until a vacuum arc extinguishing chamber applying the contact structure realizes two different through-flow path designs of over-closing and opening after the contact excitation structure design with deformable flexible connection is adopted; in a closing state, the end part of the conducting rod is directly and tightly propped against the contact blade, so that the resistance generated by the contact after closing can be reduced, the heating problem of the contact in a large current is reduced, and the stability and the service life of equipment are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy energy storage technical field, concretely is a kind of vacuum switch for source network load storage switching. BACKGROUND

[0002] Source network load storage integrated system refers to the organic integration of energy production (source), energy transmission network (network), energy consumption (load) and energy storage (storage), to form an efficient, intelligent, sustainable energy system.In the integrated system, according to real-time energy supply and demand and system operation state, dynamically adjust the operation mode and dispatching strategy between power supply, power grid, load and energy storage.For example, in the case of new energy power generation surplus, switch energy storage system into charging mode;In the case of load peak, release energy storage or adjust load priority, to optimize energy utilization efficiency, ensure the stability and reliability of power supply, while supporting efficient consumption of new energy and economic operation of system.

[0003] In the rapid switching equipment of energy storage station, vacuum switch is applied more and more due to its fast breaking and closing characteristics and large current impact resistance.In the source network load storage switching scene, the application of vacuum switch faces multiple requirements of high voltage, large capacity and fast switching.The contact of vacuum switch usually adopts butt joint structure, and the contact material is mainly copper-chromium alloy, etc., and multiple gaps are provided on the surface.During arc burning, the gap between the contacts generates a longitudinal magnetic field, which makes the arc evenly distributed on the surface of the contact, reduces the arc voltage, reduces the arc energy and contact corrosion, thereby improving the breaking capacity and service life.Due to the above structure, in use, when vacuum circuit breaker is closed, the resistance is too high, which causes a lot of heat in the closing process, affecting the stability and service life of the equipment. SUMMARY

[0004] The utility model aims at providing a kind of vacuum switch for source network load storage switching to solve the problems in prior art.

[0005] In order to achieve the above-mentioned purpose, the technical scheme of the utility model provides a kind of vacuum switch for source network load storage switching, which comprises an upper end cover, an outer shell, a lower end cover, a steel cover, a static conductive rod, two contact units, a movable conductive rod and a third elastic member, further comprising a first elastic member and a second elastic member.The lower end of the static conductive rod is connected to the contact unit by the first elastic member, and the upper end of the movable conductive rod is connected to the contact unit by the second elastic member.

[0006] Preferably, the contact unit comprises a contact seat in the shape of a circular tube and a contact piece fixedly connected with the contact seat, and an array of slots penetrating through the contact seat and the contact piece is arranged on the contact seat and the contact piece; the steel cover is arranged outside the two contact units, and the movable conducting rod is connected with the lower end cover through a third elastic member.

[0007] Preferably, a connecting disc is arranged on the side of the static conducting rod and the movable conducting rod connected with the contact unit.

[0008] Preferably, an array of protrusions is arranged on the connecting disc, the protrusions are matched with the slots, and the protrusions are located at the lower part of the slots.

[0009] Preferably, the first elastic member, the second elastic member and the third elastic member are stainless steel bellows.

[0010] Preferably, the stainless steel bellows comprises a top plate, a corrugated part and a bottom plate, the top plate and the bottom plate are in the shape of a disc, and a through hole is arranged in the center; a limiting protrusion ring is arranged at the connecting area of the static conducting rod and the movable conducting rod with the first elastic member, the second elastic member and the third elastic member, the top plate is arranged at the limiting protrusion ring, and the bottom plate is connected with the contact seat and the lower end cover.

[0011] Preferably, an outward first bending part is arranged at the end of at least one side of the steel cover, and an inward protrusion ring is arranged inside the shell and matched with the bending part.

[0012] Preferably, an upward second bending part is arranged at the end of the bending part, the outer diameter of the second bending part is the same as the inner diameter of the shell, a limiting ring is arranged inside the second bending part, the outer diameter of the limiting ring is the same as the inner diameter of the second bending part, the lower part is tightly abutted with the upper surface of the bending part, and the upper part is connected with the upper end cover.

[0013] The utility model provides a kind of vacuum switch for source network load storage switching, and the elastic connection of conducting rod is matched with contact, after completing closing arc extinguishing, conducting rod continues relative movement until the contact excitation structure design with deformable flexible connection is passed, so that the vacuum arc chamber of application contact structure realizes the design of two different through-flow paths of closing and opening, the end of conducting rod is directly and tightly abutted with contact piece in closing state, can reduce the resistance generated by contact after closing, reduce its heating problem at large current, it is favorable to improve the stability and service life of equipment. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the overall scheme schematic diagram of the utility model.

[0015] Figure 2 It is the overall scheme cross-sectional view of the utility model.

[0016] Figure 3It is the partial enlarged view of the contact area section of the utility model.

[0017] Figure 4 It is the partial enlarged view of the steel cover area section of the utility model. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be apparently and completely described in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the range protected by the utility model.

[0019] As shown in the accompanying Figures 1-4 The utility model relates to a vacuum switch for source network load storage switching, which comprises an upper end cover 1, an outer shell 2, a lower end cover 10, a steel cover 3, a static conductive rod 4, a first elastic member 5, two contact units 6, a moving conductive rod 7, a second elastic member 8 and a third elastic member 9.

[0020] The lower end of the static conductive rod 4 is connected to the contact unit 6 through the first elastic member 5, and the upper end of the moving conductive rod 7 is connected to the contact unit 6 through the second elastic member 8.

[0021] The contact unit 6 comprises a contact seat 62 and a contact piece 61, the contact seat is in the shape of a circular tube, the contact piece 61 and the contact seat 62 are fixedly connected through brazing, and an array of slots 63 penetrating through the contact seat 62 and the contact piece 61 are arranged on the contact seat 62 and the contact piece 61.

[0022] The end portions of the static conductive rod 4 and the moving conductive rod 7 can extend into the interior of the contact unit 6 and contact the contact piece 61.

[0023] The steel cover 3 is arranged outside the two contact units 6 and covers the upper and lower limit positions of the contact units 6.

[0024] The outer shell 2 is arranged outside the steel cover 3, the upper end cover 1 and the lower end cover 10 are arranged at the openings on the two sides of the outer shell 2, and the steel cover 3, the static conductive rod 4, the first elastic member 5, the two contact units 6, the moving conductive rod 7, the second elastic member 8 and the third elastic member 9 are arranged in the space enclosed by the outer shell 2, the upper end cover 1 and the lower end cover 10, and the moving conductive rod 7 is connected to the lower end cover 10 through the third elastic member 9.

[0025] Furthermore, one side of the static conductive rod 4 and the moving conductive rod 7 connected with the contact unit 6 is provided with a connecting disc p.

[0026] Furthermore, as shown in the accompanying Figure 3As shown, an array of protrusions p1 are provided on the connecting plate p. The protrusions p1 cooperate with the slot 63 and are located at the lower part of the slot 63. When the circuit is closed, they can be inserted into the slot 63 to further reduce the circuit resistance.

[0027] Furthermore, as shown in the attached document. Figure 2 , 3 As shown, the first elastic element 5, the second elastic element 8, and the third elastic element 9 are stainless steel corrugated pipes b.

[0028] The stainless steel corrugated pipe b includes a top plate b1, a corrugated section b2, and a bottom plate b3. The top plate b1 and the bottom plate b3 are disc-shaped, with a through hole in the center for the static conductive rod 4 and the dynamic conductive rod 7 to pass through.

[0029] A limiting protrusion ring x is provided in the connection area between the static conductive rod 4, the moving conductive rod 7 and the first elastic element 5, the second elastic element 8, and the third elastic element 9. The top plate b1 is located at the limiting protrusion ring x, and the bottom plate b3 is connected to the contact seat 62 and the lower end cover 10.

[0030] Through the above connection structure, during closing, the external pusher pushes the moving conductive rod 7 upward, stretching the third elastic element 9. The two contact units 6 move relative to each other. After the contact plates 61 of the two contact units 6 contact, the external pusher continues to operate, compressing the first elastic element 5 and the second elastic element 8. The ends of the stationary conductive rod 4 and the moving conductive rod 7 gradually extend into the interior of the contact unit 6 and contact the contact plates 61. When the connecting disc p of the first elastic element 5 and the second elastic element 8 is in close contact with the contact plates 61, the external pusher stops operating, completing the closing operation.

[0031] It should be further explained that the external pushing component is conventional knowledge in the field. The static conductive rod 4 and the moving conductive rod 7 extending out of the upper end cover 1 and the lower end cover 10 are straight rods in the attached figure, which can be bent into a bent rod shape.

[0032] As attached Figure 4 As shown, further, at least one end of the steel cover 3 is provided with an outwardly facing first bend 31, and an inwardly facing protruding ring 21 is provided inside the outer shell 2 to cooperate with the bend 31. Furthermore, the end of the bend 31 is provided with an upwardly facing second bend 32, the outer diameter of the second bend 32 being the same as the inner diameter of the outer shell 2. A limiting ring 22 is provided inside the second bend 32, the outer diameter of the limiting ring 22 being the same as the inner diameter of the second bend 32, the lower part of the limiting ring 22 tightly abutting against the upper surface of the bend 31, and the upper part connecting to the upper end cap 1. This achieves a fixed connection between the steel cover 3 and the outer shell.

[0033] It should be noted that unless specifically stated and limited otherwise, the terms "mounting", "connecting", "connecting", "fixing", "setting" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

Claims

1. A vacuum switch for source network load storage switching, comprising an upper end cover, an outer shell, a lower end cover, a steel cover, a static conducting rod, two contact units, a moving conducting rod, a third elastic member, characterized in that, Also include first elastic member, second elastic member, the static conductive rod lower end is connected to the contact unit through the first elastic member, the dynamic conductive rod upper end is connected to the contact unit through the second elastic member.

2. The vacuum switch for source-network-packet-storage switching according to claim 1, wherein The contact unit includes a contact seat and a contact piece, the contact seat is a circular tube, the contact piece and the contact seat are fixedly connected, and an array of slots penetrating the contact seat and the contact piece are arranged on the contact seat and the contact piece; the steel cover is arranged outside the two contact units, and the dynamic conductive rod is connected to the lower end cover through a third elastic member.

3. The vacuum switch for source-network-packet-storage switching according to claim 2, characterized in that, The side, where the static conductive rod and the dynamic conductive rod are connected to the contact unit, is provided with a connecting disc.

4. The vacuum switch for source-network-packet-storage switching according to claim 3, wherein An array of protrusions are arranged on the connecting disc, the protrusions are matched with the slots and are located at the lower part of the slots.

5. The vacuum switch for source network load storage switching according to claim 2, characterized in that, The first elastic member, the second elastic member and the third elastic member are stainless steel bellows.

6. The vacuum switch for source network load storage switching according to claim 5, characterized in that, The stainless steel bellows include a top plate, a corrugated part and a bottom plate, the top plate and the bottom plate are discs, and a through hole is arranged in the center; a limiting protrusion ring is arranged at the connecting area of the static conductive rod, the dynamic conductive rod, the first elastic member, the second elastic member and the third elastic member, the top plate is arranged at the limiting protrusion ring, and the bottom plate is connected to the contact seat and the lower end cover.

7. The vacuum switch for source-network-packet-storage switching according to claim 2, characterized in that, The end of at least one side of the steel cover is provided with an outward first bending part, and an inward protrusion ring is arranged inside the shell and matched with the bending part.

8. The vacuum switch for source-network-packet-storage switching according to claim 7, characterized in that, The end of the bending part is provided with an upward second bending part, the outer diameter of the second bending part is the same as the inner diameter of the shell, a limiting ring is arranged inside the second bending part, the outer diameter of the limiting ring is the same as the inner diameter of the second bending part, the lower part is tightly top-hinged with the upper surface of the bending part, and the upper part is connected to the upper end cover. The end of the bending part is provided with an upward second bending part, the outer diameter of the second bending part is the same as the inner diameter of the shell, a limiting ring is arranged inside the second bending part, the outer diameter of the limiting ring is the same as the inner diameter of the second bending part, the lower part is tightly top-hinged with the upper surface of the bending part, and the upper part is connected to the upper end cover.

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