CN212113556U

CN212113556U - Vacuum switch device

Info

Publication number: CN212113556U
Application number: CN202021012035.4U
Authority: CN
Inventors: 赵中利; 赵鹏飞
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-05
Filing date: 2020-06-05
Publication date: 2020-12-08
Anticipated expiration: 2030-06-05

Abstract

The utility model discloses a vacuum switch device, which comprises a vacuum box body, wherein a switch unit is arranged in the vacuum box body, the switch unit comprises a bracket, a moving electrode, a static electrode, a transmission device and a main shaft, two ends of the vacuum box body are respectively and fixedly provided with an incoming line end and an outgoing line end, and the main shaft is arranged on the vacuum box body through a bearing seal rotation and is connected with an external operating mechanism of the box body; the static electrode is fixedly connected with the wire inlet end. The utility model discloses a vacuum box, the main shaft passes through the switching that transmission realized sound contact, and then has constituted open-type vacuum switch tube, the sealing member of this easy gas leakage of cancellation bellows, make the little vacuum environment in the switch tube change into the inside big vacuum environment of whole switch box, switch arc extinguishing and insulating all adopt vacuum medium, increase switch fracture distance, move, do not have the solid insulation spare to connect between the static electrode, no leakage current and induced voltage between the fracture, improve insulating and safe demand greatly.

Description

Vacuum switch device

Technical Field

The utility model relates to a power switching equipment technical field especially relates to a vacuum switch device.

Background

At present, the existing vacuum switch devices mainly comprise switch devices such as circuit breakers, load switches and the like and switch devices or complete set of switch devices in a combined form, wherein the vacuum switch devices such as the vacuum circuit breakers, the load switches and the like adopt vacuum switch tubes to carry out the closing and opening of circuits, the switch tubes are sealed tubes, the interior of the vacuum switch tubes is in a vacuum state, the arc extinguishing performance is good, but the opening distance of fractures is relatively small, induced voltage exists between the fractures, moving electrodes and static electrodes are connected by porcelain sleeves, the solid insulating materials belong to, leakage current exists between the fractures, the safety distance required by circuit isolation fractures cannot be reached, the vacuum switch devices cannot be used as isolating switches, if the vacuum switch devices are used, isolating switches are connected in series to form double-fracture combined switches to meet the opening and safety isolation of the circuits, and due to the existing opening distance of the vacuum switches, accidents caused by relatively small reignition when capacitor banks are switched, the specific reasons are as follows:

in order to meet the requirement of the motion of a moving contact and ensure the sealing property of a switching tube, a vacuum switching tube usually adopts a corrugated tube as a sealing element, but in practical application, the corrugated tube is thin and only 0.1-0.2 mm thick, so that the corrugated tube is easily twisted during assembly to cause air leakage of the switching tube and then scrapped, the risk of air leakage is high after frequent operation, and the mechanical life is greatly limited; the existing primary and secondary fusion switch equipment requires that a vacuum circuit breaker needs to be internally provided with a disconnecting switch and requires linkage of the circuit breaker and the disconnecting switch, and the disconnecting switch cannot be internally arranged due to the limited internal space of the vacuum circuit breaker; the circuit breaker and the isolating switch belong to two different switches and are respectively driven by independent operating mechanisms, and the operation of the circuit breaker and the isolating switch requires sequence and time difference, so that one operating mechanism is difficult to drive the two switches, and the two switches are difficult to realize linkage; furthermore, the pipe wall of the existing vacuum switch pipe is mostly a porcelain pipe, monitoring components cannot be installed on the porcelain pipe, the seal of the switch pipe is damaged even if the switch pipe is punched and installed, and the interior of the switch pipe is a high-voltage area, so that the space is limited, a barometer and a sensor cannot be installed on the existing vacuum switch pipe, and online monitoring of the vacuum degree is difficult to realize; finally, the complete set of switch equipment needs the vacuum switch devices such as a circuit breaker and a load switch to be combined with an isolating switch and an earthing switch for use, the switch combination size is large, more than two operating mechanisms are needed for operation, an interlocking device is also needed for preventing misoperation, the operation is complicated, the isolating switch and the earthing switch are basically operated manually, the rapid positioning and rapid power restoration of distribution network automatic faults are not facilitated, and the intellectualization of power switch equipment and the development of the power internet of things are not facilitated; insulating gases such as SF6 and the like which are made of materials with good insulating property and are adopted in the existing switch insulation are seriously harmful to the environment, and have poor insulating property with small harm to the environment, so that the existing vacuum switch device can not meet the actual requirement.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a vacuum switch device when can guarantee switch safety demand, makes the switch structure simpler, convenient, safety, and the monitoring of being convenient for, equipment itself can not cause the pollution to the environment simultaneously.

The utility model adopts the technical proposal that:

a vacuum switch device comprises a vacuum box body, a wire inlet end and a wire outlet end, wherein a switch unit is arranged in the vacuum box body and comprises a support, a moving electrode, a static electrode, a transmission device and a main shaft, and the main shaft is arranged on the vacuum box body in a sealing and rotating mode through a bearing and is connected with an operating mechanism outside the box body; the static electrode is fixedly connected with the wire inlet end, and the other end of the dynamic electrode is in flexible connection with the wire outlet end; the transmission device comprises an insulating pull rod, a first crank arm and a second crank arm, wherein a first pin hole is formed in the top end of the first crank arm and used for being connected with one end shaft pin of the insulating pull rod, the other end of the insulating pull rod is connected with one end pin of the second crank arm through a pin, the other end of the second crank arm is fixedly connected with a main shaft, a second pin hole is formed in the middle of the first crank arm and used for being connected with a support pin, and a third pin hole is formed in the bottom end of the first crank arm and used for being connected with a moving electrode pin.

The device also comprises an insulating cylinder, wherein one end of the insulating cylinder 14 is fixedly connected with the wire inlet end 2, the other end of the insulating cylinder is vacant and is not connected with the moving electrode, and the insulating cylinder and one end of the moving electrode are arranged at intervals.

The insulation tube is characterized by further comprising a shielding cover, wherein the shielding cover is fixedly arranged on the inner wall of the insulation tube.

The device is characterized by further comprising a guide device, wherein the guide device comprises a guide sleeve and a guide rod, one end of the guide rod is in sliding connection with the wire outlet end, the other end of the guide rod is fixedly connected with the other end of the moving electrode, the guide sleeve is fixedly arranged on the support, and the other end of the guide rod is arranged in the guide sleeve.

The vacuum box further comprises a grounding contact 14 and a grounding bar 15, wherein the grounding contact is fixedly arranged at one end of the guide rod, the grounding bar is fixedly arranged at one side of the vacuum box body, the grounding bar and the grounding contact are in open-close configuration, and the grounding contact is in flexible connection with the moving contact through a conducting wire.

The bottom end of the crank arm is connected with a guide rod pin shaft.

The second pin hole is a long hole.

The switch units are arranged in parallel.

Still include the intelligent monitoring components and parts, the intelligent monitoring components and parts are equallyd divide and are fixed the setting on the inside wall of vacuum box respectively.

The intelligent monitoring component comprises a barometer, an air pressure sensor, a temperature sensor, a current sensor and a camera, wherein the voltage sensor is electrically connected with the guide sleeve support through a flexible conductor.

The utility model discloses a vacuum box, set up the main shaft on vacuum box, the main shaft passes through the switching that transmission realized sound contact, and then open-type vacuum switch tube has been constituted, the sealing member of this easy gas leakage of cancellation bellows, make the interior little vacuum environment of switch tube change into the inside big vacuum environment of whole switch box, make switch tube and switch box internal vacuum environment fuse together, switch arc extinguishing and insulating all adopt vacuum medium, increase switch fracture distance, move, do not use solid insulation spare to connect between the static electrode, there is not leakage current and induced voltage between the fracture, satisfy the reliability requirement of closing and opening and safety isolation of circuit, and can also realize vacuum isolation switch, vacuum isolation circuit breaker, vacuum isolation load switch, vacuum isolation coincidence ware, vacuum isolation sectionalizer, vacuum isolation boundary switch, vacuum isolation contactor, Three-station (closing, isolating and grounding) vacuum switch and other types of switch equipment.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of the inlet cabinet according to embodiment 1 of the present invention;

fig. 3 is a schematic structural diagram of the outlet cabinet according to embodiment 1 of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.

As shown in fig. 1, the utility model comprises a vacuum box 1, a switch unit is arranged in the vacuum box 1, the switch unit comprises a support 7, a moving electrode 4, a static electrode 3, a transmission device and a main shaft 12, two ends of the interior of the vacuum box 1 are respectively and fixedly provided with a wire inlet end 2 and a wire outlet end 8, and the main shaft 12 is rotatably arranged on the vacuum box 1 through a bearing seal; the static electrode 3 is fixedly connected with the wire inlet end 2, and the other end of the dynamic electrode 4 is in flexible connection with the wire outlet end 8; the transmission device comprises an insulating pull rod 11, a first crank arm 10 and a second crank arm 17, wherein a first pin hole is formed in the top end of the first crank arm 10 and used for being connected with one end of the insulating pull rod 11 through a pin shaft, the other end of the insulating pull rod 11 is connected with one end of the second crank arm 17 through a pin shaft, the other end of the second crank arm 17 is fixedly connected with the main shaft 12, a second pin hole is formed in the middle of the first crank arm 10 and used for being connected with the support 7 through a pin shaft, and a third pin hole is formed in the bottom end of the first crank arm 10 and used for being connected with the guide rod 9 through a pin shaft.

Still include insulating cylinder 14, insulating cylinder 14 one end and inlet wire end 2 fixed connection, the other end is unsettled with the one end of moving electrode 4 and is placed, and insulating cylinder and moving electrode keep the interval setting. The device also comprises a shielding cover 13, wherein the shielding cover 13 is fixedly arranged on the inner wall of the insulating cylinder 14. Because the utility model discloses a 13 outer pipe walls of shield cover do not have the confined, do not have with the shield cover 13 circumstances under, if 1 inner space of vacuum box is enough to satisfy the requirement of putting out an arc and safety and insulating requirement, insulating cylinder and shield cover just can not set up, otherwise if can not satisfy, then through insulating cylinder and shield cover increase safety demand and insulating requirement. Further the insulating cylinder can be designed with the insulating sleeve of the inlet wire end 2 in an integrated mode, so that the overall size of the device can be reduced, and the size is smaller under the condition that the device meets the insulating requirement.

Still including guider, guider include uide bushing 5 and guide bar 9, 9 one end of guide bar be connected with leading-out terminal 8, the other end and the other end fixed connection of moving electrode 4, the uide bushing is fixed to be set up on support 7, and the other end setting of guide bar 9 is in uide bushing 5. The bottom end of the first crank arm 10 is connected with the guide rod 9 through a pin shaft, the movable electrode can move horizontally through the guide device, and uneven gaps are avoided when the movable electrode is in contact with and separated from the static electrode. The second pin hole is a long hole. The switch units are arranged in parallel. The utility model discloses a when guider's rectangular hole and round pin hub connection's cooperation can realize the turning arm and rotate, when transmitting guide bar or moving electrode and remove, can make the removal of guide bar displacement eliminate from top to bottom to can the steady stroke that tends to the straight line when guaranteeing the moving electrode and remove, move, the static contact surface is in parallel state all the time, avoid moving, local contact when the static is closed, the off-time gap is different, electric field intensity distributes inhomogeneously, avoid the production of unnecessary electric arc spark. The guider sets up in order to make the movable electrode can horizontal migration under the transmission effect, and the effect that can not incline is better, and wherein uide bushing and guide bar can select the increase and decrease setting according to the demand of reality, under the prerequisite of guaranteeing safe insulation, make overall structure smaller and more exquisite.

Switch element have a plurality ofly, a plurality of switch element parallel arrangement, the cross-section schematic diagram that shows in the picture is this application, be the parallel arrangement of three switch element mostly in the in-service use, it corresponds three phase current respectively, and a vacuum box of three switch element sharing to the volume is more small and exquisite when making whole equipment security also can satisfy the demand.

The switch adopts an open type vacuum switch tube, so that a small vacuum environment in the switch tube is changed into a large vacuum environment in the whole switch box body, the vacuum environment in the switch tube and the vacuum environment in the switch box body are integrated, a movable sealing element which is a corrugated tube and easy to leak gas is cancelled, a guide part of the switch tube is separated from the switch tube, and a movable electrode connecting guide rod of the switch tube penetrates through the separated guide part to perform opening and closing motion relative to a static electrode. Because the vacuum switch tube moving electrode and the static electrode which are arranged in the switch are not connected in a sealing way by the switch tube, the limit of the tube wall of the switch tube and the corrugated tube is avoided, the distance of the switch fracture can be adjusted at will, the requirements of safe distance and insulation can be met, and the vacuum switch tube can also be used as a vacuum isolating switch.

The utility model discloses a vacuum switching device, a switch fracture possesses the switch function of two kinds of types, can be used to type switch and complete sets of switchgear such as vacuum isolation circuit breaker, vacuum isolation load switch, vacuum isolation coincidence ware, vacuum isolation sectionalizer, vacuum isolation boundary switch, vacuum isolation contactor. The switch is simplified and integrated, only one operating mechanism is needed, a mechanical interlocking device is not needed, the switch is small in size, simple in structure and easy and convenient to operate, and the possibility of misoperation of the switch is blocked.

The utility model discloses an inlet terminal 2 and outlet terminal 8 are fixed respectively inside box 1, static electrode 3 and inlet terminal 2 fixed connection, insulator 14 is fixed outside static electrode 3, shield 13 is adorned in insulator 14, moving electrode 4 tip contact part is arranged in shield 13, moving electrode 4 conducting rod part passes guider 5, moving electrode 4 conducting rod terminal surface and flexible coupling 6 fixed connection, guide bar 9 one end is connected with moving electrode 4 conducting rod part, the other end passes guider 5 and support 7 and stretches into the guiding hole of outlet terminal 8, the hole in the middle part of connecting lever 10 is connected with the pivot on support 7, connecting lever 10 rotary motion, connecting lever 10 one end is connected with guide bar 9, the other end is connected with insulating pull rod 11, flexible coupling 6 is connected with outlet terminal 8 conducting part, main shaft 12 rotary motion, promote insulating pull rod 11 and make arm 10 rotary motion, the crank arm 10 drives the guide rod 9 and the moving electrode 4 to perform linear motion, the opening and closing operation of the vacuum switch device is realized, the switch box body 1 is a sealed box body, the inside is vacuumized, electric arcs formed by switch opening are extinguished in the shielding cover 13 when the circuit passes zero, safe and reliable isolation fractures are formed after the static electrode 3 and the moving electrode 4 are opened, one switch can complete the functions of extinguishing the electric arcs and safety isolation, the two-in-one combination of switch equipment such as a circuit breaker or a load switch and an isolation switch is realized, and the structure of the multifunctional switch equipment is integrally designed.

Embodiment 1, because a vacuum fracture can satisfy the requirement of switch arc extinguishing and safety isolation, so the utility model discloses can be used for among the vacuum complete set cubical switchboard, during the use, a vacuum switch device can possess complete set cubical switchboard function, and wherein the inlet wire cabinet can adopt vacuum isolation circuit breaker or vacuum isolation load switch, can not take earthing switch, and the outlet wire cabinet can adopt vacuum isolation circuit breaker to take earthing switch, no matter takes earthing switch, all only needs a switch, an operating mechanism can realize the function of all switches of complete set cubical switchboard.

When there is an earthing switch, as shown in fig. 2 and fig. 3, on the basis of the vacuum switch device, an earthing contact 14 and an earthing bar 15 are additionally arranged, the earthing contact is fixedly arranged at one end of the guide rod, the earthing bar is fixedly arranged at one side of the vacuum box body, the earthing bar and the earthing contact are in open-close configuration, and the earthing contact is in flexible connection with the moving contact through a lead. When the outgoing line cabinet main switch is switched off, the movable electrode 4 of the isolation circuit breaker is separated from the static electrode 3, the grounding switch is linked with the main switch, the grounding contact 14 is in pressing connection with the grounding bar 15, the grounding switch is switched on, when the outgoing line cabinet main switch is switched on, the movable electrode 4 of the isolation circuit breaker is in pressing connection with the static electrode 3, the grounding switch is linked with the main switch, the grounding contact 14 is separated from the grounding bar 15, the grounding switch is switched off, and only one operating mechanism is needed to drive one switch, so that the circuit switching-on and switching-off function of the complete set of switch equipment can be realized. The inlet cabinet can be provided with no grounding switch, and the embodiment is the same as above.

The utility model discloses a structural design's break performance and break back safety isolation fracture can not appear breaking the back phenomenon of reigniting, are particularly suitable for using as the switch of switching capacitor bank. And the switch cancels a sealed vacuum switch tube, a corrugated tube which is a sealing piece easy to leak gas is not needed, the gas leakage problem and the mechanical service life problem of the switch tube do not exist, and the technical problem of the vacuum switch device is thoroughly solved. Further, the requirements of switch arc extinction and safety isolation can be met by arranging a vacuum fracture, and the technical problems that a primary and secondary fusion switch device of the vacuum circuit breaker cannot be internally provided with a disconnecting switch, and the circuit breaker and the disconnecting switch cannot be linked are solved. Meanwhile, a switch fracture has two types of switch functions, the switch is simplified and combined into a whole, only one operating mechanism is needed, a mechanical interlocking device is not needed, the switch is small in size, simple in structure and easy and convenient to operate, full-electric operation of the switch is achieved, rapid positioning and rapid power restoration of power line faults are facilitated, and development of power switch equipment intellectualization and distribution network automation is facilitated.

Finally, the utility model discloses in can install components and parts such as current transformer or electronic type sensor, barometer, baroceptor, temperature sensor, voltage sensor, camera according to the demand of reality, intelligent supervisory equipment include barometer, baroceptor, temperature sensor, current sensor and camera, wherein voltage sensor passes through the flexible coupling and is connected with the moving electrode, in the practical application because the uide bushing support also is electrically conductive, so also can with uide bushing support fixed connection, voltage sensor is fixed to be set up in vacuum bottom half. Therefore, the device can monitor the switching states of switching voltage, current, vacuum degree, contact temperature and the like in real time on line, realize the intellectualization of the switching equipment and promote the development of the electric power internet of things.

Because the vacuum box of this application adopts stainless steel metal material, and for big vacuum integration box, the space is big, so monitoring components and parts can be adorned inside the switch box, the switch box is very big for the switch tube inner space, monitoring components and parts mounted position has sufficient safe distance with the high-voltage charged body, and is further, this application adopts vacuum arc extinguishing and insulating, arc extinguishing performance and insulating properties are good, energy saving and emission reduction, low carbon environmental protection again, will make the outstanding contribution that can not wear out for improving our living environment and society sustainable development.

In the description of the present invention, it should be noted that, for the orientation words, if there are terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and positional relationship indicated are based on the orientation or positional relationship shown in the drawings, and only for the convenience of describing the present invention and simplifying the description, it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and not be construed as limiting the specific scope of the present invention.

It is noted that the terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles thereof. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the specific embodiments described herein, and may include more effective embodiments without departing from the scope of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A vacuum switching apparatus, characterized in that: the vacuum box comprises a vacuum box body, a wire inlet end and a wire outlet end, wherein a switch unit is arranged in the vacuum box body and comprises a support, a moving electrode, a static electrode, a transmission device and a main shaft, and the main shaft is arranged on the vacuum box body in a sealing and rotating mode through a bearing and is connected with an operating mechanism outside the box body; the static electrode is fixedly connected with the wire inlet end, and the other end of the dynamic electrode is in flexible connection with the wire outlet end; the transmission device comprises an insulating pull rod, a first crank arm and a second crank arm, wherein a first pin hole is formed in the top end of the first crank arm and used for being connected with one end shaft pin of the insulating pull rod, the other end of the insulating pull rod is connected with one end pin of the second crank arm through a pin, the other end of the second crank arm is fixedly connected with a main shaft, a second pin hole is formed in the middle of the first crank arm and used for being connected with a support pin, and a third pin hole is formed in the bottom end of the first crank arm and used for being connected with a moving electrode pin.

2. The vacuum switching apparatus according to claim 1, wherein: the insulation cylinder is characterized in that one end of the insulation cylinder is fixedly connected with the wire inlet end, the other end of the insulation cylinder is vacant and is not connected with the wire inlet end, and the insulation cylinder and one end of the moving electrode are arranged at intervals.

3. The vacuum switching apparatus according to claim 2, wherein: the insulation tube is characterized by further comprising a shielding cover, wherein the shielding cover is fixedly arranged on the inner wall of the insulation tube.

4. The vacuum switching apparatus according to claim 1, wherein: the device is characterized by further comprising a guide device, wherein the guide device comprises a guide sleeve and a guide rod, one end of the guide rod is in sliding connection with the wire outlet end, the other end of the guide rod is fixedly connected with the other end of the moving electrode, the guide sleeve is fixedly arranged on the support, and the other end of the guide rod is arranged in the guide sleeve.

5. The vacuum switching apparatus according to claim 4, wherein: the vacuum box further comprises a grounding contact and a grounding bar, wherein the grounding contact is fixedly arranged at one end of the guide rod, the grounding bar is fixedly arranged at one side of the vacuum box body, the grounding bar and the grounding contact are in open-close configuration, and the grounding contact is in flexible connection with the movable contact through a lead.

6. The vacuum switching apparatus according to claim 1, wherein: the bottom end of the crank arm is connected with a guide rod pin shaft.

7. The vacuum switching apparatus according to claim 6, wherein: the second pin hole is a long hole.

8. The vacuum switching apparatus according to any one of claims 1 to 5, wherein: the switch units are arranged in parallel.

9. The vacuum switching apparatus according to any one of claims 1 to 5, wherein: still include the intelligent monitoring components and parts, the intelligent monitoring components and parts are equallyd divide and are fixed the setting on the inside wall of vacuum box respectively.

10. The vacuum switching apparatus according to claim 9, wherein: the intelligent monitoring component comprises a barometer, an air pressure sensor, a temperature sensor, a current sensor and a camera, wherein the voltage sensor is electrically connected with the guide sleeve support through a flexible conductor.