CN104835677A

CN104835677A - Vacuum rotary three-position switch tube

Info

Publication number: CN104835677A
Application number: CN201510208033.XA
Authority: CN
Inventors: 陈宏�
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-04-28
Filing date: 2015-04-28
Publication date: 2015-08-12

Abstract

The invention provides a vacuum rotary three-position switch tube. The vacuum rotary three-position switch tube comprises a gastight insulation shell assembly, a moving contact blade assembly, a rotary spindle assembly and three fixed contacts, wherein the moving contact blade assembly, the rotary spindle assembly and the fixed contacts are encapsulated in the gastight insulation shell assembly in a vacuum manner, the rotary spindle assembly is arranged at the central axis of the gastight insulation shell assembly, the moving contact blade assembly can be rotationally arranged in the gastight insulation shell assembly through the rotary spindle assembly, the three fixed contacts are evenly distributed at the outer periphery of the gastight insulation shell assembly, and the moving contact blade assembly can be driven through the rotation of the rotary spindle assembly, so that the moving contact blade assembly can be closed synchronously with one pair of fixed contacts selected from the three fixed contacts. According to the vacuum rotary three-position switch tube of the invention, sequential switching between closing, isolating and grounding can be realized, and two generated isolation fractures are safe and reliable, and a complicated transmission structure and an interlocking structure are not required to perform control; the height and size of an arc extinguishing chamber can be shortened, and total stroke loss caused by transmission connection gaps can be reduced.

Description

A kind of vacuum rotating three-station switching tube

Technical field

The present invention relates to technical field of electric power, particularly relate to a kind of vacuum rotating three-station switching tube, is that in middle high-pressure switch, core cut-offs circuit components.

Background technology

Vacuum switch tube (being also vacuum interrupter) is that a kind of volume is little, the life-span long, non-maintaining, environmental protection, safe and reliable vacuum form arc extinguishing device, be widely used in electric power system.Vacuum switch tube principle is for be fixedly encapsulated in dynamic and static arcing contact after in an airtight insulation crust, by special exhaust equipment, inner air tube is extracted out, make in pipe, to reach necessarily required vacuum degree, and the rapidly blow-out suppress regeneration of current after making cut-out circuit of the insulation property utilizing vacuum excellent and pitch-durable performance, thus form reliable fracture, avoid accident and unexpected generation.

The dynamic and static contact distribution form of the upper and lower end of Direct Action Type is all adopted in existing vacuum switch tube, the outside airtight insulation crust of cylinder cartridge type that adopts is encapsulated, and existing three position vacuum switch tubes increase by one section along its length again as grounding contact link position on original two station vacuum tube bases, airtight insulation crust is become more elongated, and line bus connects and is in transmission connection also comparatively complicated, this structure can only form single isolation fracture and cannot realize visible simultaneously.

Disclosed in 16 days January in 2013, publication number is the Chinese invention of 102881510A, discloses a kind of three station vacuum arc extinguish chambers, comprises main contact, conducting rod, insulating contact, grounding contact, bellows, fairlead, magnet ring and insulation crust; Main contact, insulating contact and grounding contact are from top to bottom arranged on insulation crust, and magnet ring is sealingly fastened in insulation crust bottom, and bellows upper end is welded on conducting rod, and lower end is welded on magnet ring.This invention adopts a vacuum interrupter can realize original three stations needing two arc control device to realize and namely closes a floodgate, isolates and ground connection three functions, and be the vacuum insulation of a kind of advanced person, ground connection arc control device, structure is simple, with low cost.Contact inwall of the present invention is provided with interpolation watchband-shaped contactor, and it is reliable that it has contact, the feature that through-current capability is strong; In connection service position and ground connection service position, do not need extra confining force, simplify the drive unit of isolation earthing switch.

Disclosed in 17 days Augusts in 2011, publication number is the Chinese invention of 102157297A, disclose a kind of three position vacuum switch tubes, comprise vacuum chamber, static contact component, moving contact component and grounding contact, the earth terminal that grounding contact comprises grounding contact ring and is electrically connected with grounding contact ring, moving contact is driven by operating mechanism and does straight line back and forth movement at fixed contact and grounding contact interannular; When moving contact and fixed contact and grounding contact ring are all in off-state, the tolerance electric field strength between moving contact and fixed contact is greater than moving contact or the tolerance electric field strength between fixed contact and grounding contact.The present invention is while realization connection, isolation and ground connection three station function, not only there is compact conformation, reasonable in design, advanced technology, meet existing relevant criterion, electric life and mechanical endurance length, the advantage such as applied range, and when vacuum degree is once reduction, first electrical breakdown occurs between load side and earth terminal, leakage current, short circuit current are flowed into the earth, guarantee attendant's safety of possibility false touch and load side, security reliability is high.

Disclosed in 8 days February in 2012, publication number is the Chinese utility model of 202142468U, disclose a kind of three position vacuum switch tubes, comprise insulation crust, quiet end conducting rod, moved end conducting rod and ground connection flange, quiet end conducting rod connects with high pressure inlet wire, and end is provided with fixed contact; Moved end conducting rod is for connecting electrical load, and its top upper and lower surface being positioned at vacuum switch tube inside arranges dynamic insulating contact and dynamic grounding contact respectively; Top, ground connection flange middle part is provided with static ground contact, conducting rod top, moved end is provided with and forms the radome of going along with sb. to guard him to described dynamic insulating contact and fixed contact, moved end conducting rod motion also can be followed for fracture arc shield, whole process can be wrapped in isolation fracture, good shielded arc effect can be played and structure is simple, reduce product height; Adduction formula intermediate end cover is adopted to be fixed on ground connection flange bottom, switch framework fixture can be made to be embedded into intermediate end cover recess, can supported grounding flange well, avoid intermediate end cover and insulation shell commissure stressed, improve its structural strength, improve reliability and useful life.

Summary of the invention

The technical problem to be solved in the present invention, be to provide a kind of vacuum rotating three-station switching tube, by dynamic and static main contact Vacuum Package in a kind of airtight insulation crust of " Y " type cylindrical shape, vacuum (vacuum degree is below 10-4Pa mercury column) is utilized to have the features such as excellent insulation property and pitch-durable performance, the version of rotating knife chip is adopted to make dynamic and static contact relatively rotate the distance of a section very little, can realize combined floodgate, isolation, ground connection three kinds of stations, and the isolation double-fracture produced is safe and reliable, high-visible; Meanwhile, adopted the clear glass of high strength by side cover in airtight insulation crust system, clearly can see moving contact rotating blade present position; In addition, fixed contact part is also designed with the arc extinguishing grid pieces of free charged particles and the cylinder of resistance to arc shield of the airtight insulation crust inwall of protection, avoids causing vacuum switch tube casing insulation intensity to decline and causes flashover.

The present invention is achieved in that

A kind of vacuum rotating three-station switching tube, comprises an airtight insulative shell member, movable touch knife assembly, a rotating spindle assembly and three fixed contacts; Described movable touch knife assembly, described rotating spindle assembly, described fixed contact Vacuum Package are in described airtight insulative shell member; Described rotating spindle assembly is located on the central axis of described airtight insulative shell member; Described movable touch knife assembly can be located in described airtight insulative shell member by described rotating spindle assembly rotationally; Described three fixed contacts are evenly distributed in the outer ring of described airtight insulative shell member, and described movable touch knife assembly is rotarily driven by described rotating spindle assembly and can realize selecting and wherein a pair fixed contact synchronizing close.

Further, described movable touch knife assembly comprises two movable touch knifes, two contact knife spacers, four groups of contacts fold spring and two rivets, and any movable touch knife comprises two blades being mutually 120 degree of angles and the contact knife pivoted housing welded with described two blades; Described two movable touch knifes along axis two ends respectively symmetry load in described rotating spindle assembly; By described contact knife spacer make described two movable touch knifes exist both sides that fixed intervals ensure be electrically connected on described fixed contact after rotation, described contact is folded the outside that described two movable touch knifes are located at respectively by spring again, and fold contact pressure required when spring ensures that two movable touch knifes contact with fixed contact by described rivet compression contacts.

Further, described rotating spindle assembly comprises a moving contact rotating shaft and two rotary seal parts, and any one rotary seal part comprises a movable sealing axle sleeve, two O type metal o-rings and two movable sealing bearings; Described two rotary seal partial symmetry are distributed in the both sides of described moving contact rotating shaft; Described moving contact rotating shaft is positioned on the central axis of described airtight insulative shell member by two rotary seal parts; Described movable sealing axle sleeve internal symmetry arranges two described movable sealing bearings and two described O type metal o-rings.

Further, described airtight insulative shell member comprises three quiet end cappings matched with the outside of described fixed contact, an airtight insulation crust of Y type, the capping of two side shells, two moved end side covers, two side cover big envelopes, three stationary contact skulls matched with the top of described fixed contact; The airtight insulation crust of described Y type is provided with a body cavity, and on this body cavity, radial direction is provided with three pilot holes; Described movable touch knife assembly is located in body cavity, and is sealed in the axial two ends of body cavity with the capping of described side shell and described moved end side cover, and the capping of side shell is positioned at the outer ring of described moved end side cover; Arbitrary described fixed contact correspondence is arranged in a pilot hole, and is sealed in the outer end of pilot hole with stationary contact skull described in end capping quiet described in one and, and described quiet end capping is positioned at the outer ring of described stationary contact skull; And the outer end of described rotating spindle assembly also seals by described moved end side cover.

Further, also comprise six arc-chutes, described arc-chute is located at the both sides of described fixed contact respectively.

Further, also comprise a cylinder of resistance to arc shield, the described cylinder of resistance to arc shield is attached to the inner surface of the body cavity of the airtight insulation crust of described Y type, and the described cylinder of resistance to arc shield correspondence is provided with three through holes matched with described pilot hole, the size of through hole penetrates in the described cylinder of resistance to arc shield for described fixed contact just, and described arc-chute can contact the inner ring of described through hole.

Further, described body cavity is cylindric.

Tool of the present invention has the following advantages: the insulation property that the present invention utilizes vacuum excellent, the version rotating contact knife chip is adopted to make, fixed contact relatively rotates one section of very little distance, can realize closing a floodgate, isolation, between ground connection three kinds of stations, order switches, the isolation double-fracture produced is safe and reliable, drive mechanism without the need to complexity controls with interlocking, be more suitable for the ring network power supply connected mode of different line position, also reduce arc control device height of contour size simultaneously, and obvious visible separating brake isolated location fracture can be realized, and owing to using little transmission link, greatly reduce the total kilometres loss caused by the gap that is in transmission connection, improve transmission efficiency.

Accompanying drawing explanation

The present invention is further illustrated in conjunction with the embodiments with reference to the accompanying drawings.

Fig. 1 is perspective interior structure cutaway view of the present invention.

Fig. 2 is Plane Rotation structure cutaway view of the present invention.

Fig. 3 is the structural representation of the airtight insulation crust of Y type of the present invention.

Fig. 4 is the service position schematic diagram that the present invention realizes when isolating.

Fig. 5 be the present invention realize close a floodgate or ground connection time service position schematic diagram.

Reference numeral:

The airtight insulative shell member of 1-; The quiet end capping of 11-; The airtight insulation crust of 12-Y type; 121-body cavity; 122-pilot hole; The capping of 13-side shell; 14-moved end side cover; 15-side cover big envelope; 16-stationary contact skull; 2-rotating spindle assembly; 21-moving contact rotating shaft; 22-rotary seal part; 221-movable sealing axle sleeve; 222-O type metal o-ring; 223-movable sealing bearing; 3-movable touch knife assembly; 31-movable touch knife; 311-blade; 312-contact knife pivoted housing; 32-contact knife spacer; 33-contact folds spring; 34-rivet; 4-fixed contact; 5-arc-chute; The 6-cylinder of resistance to arc shield.

Embodiment

Refer to shown in Fig. 1 to Fig. 3, a kind of vacuum rotating three-station switching tube of the present invention, comprises an airtight insulative shell member be made up of glass or pottery 1, rotating spindle assembly 2, movable touch knife assembly 3, three fixed contacts 4, six arc-chutes 5, cylinder of resistance to arc shield 6; Described arc-chute 5 is located at the both sides of described fixed contact 4 respectively, and described movable touch knife assembly 3, described rotating spindle assembly 2, described fixed contact 4 Vacuum Package are in described airtight insulative shell member 1; Described rotating spindle assembly 2 is located on the central axis of airtight insulative shell member 1; Described movable touch knife assembly 3 can be located in airtight insulative shell member 1 by described rotating spindle assembly 2 rotationally; Described three fixed contacts 4 are evenly distributed in the outer ring of described airtight insulative shell member 1, and described movable touch knife assembly 3 is rotarily driven by rotating spindle assembly 2 and realizes selecting and wherein a pair fixed contact 4 synchronizing close.

Described rotating spindle assembly 2 comprises a moving contact rotating shaft 21 and two rotary seal parts 22, and any one rotary seal part 22 comprises a movable sealing axle sleeve 221, two O type metal o-rings 222 and two movable sealing bearings 223; Described two rotary seal parts 22 are symmetrically distributed in the both sides of described moving contact rotating shaft 21; Described moving contact rotating shaft 21 is positioned on the central axis of described airtight insulative shell member 1 by two rotary seal parts 22; Described movable sealing axle sleeve 221 internal symmetry arranges two described movable sealing bearings 223 and two described O type metal o-rings 222.

Described movable touch knife assembly 3 comprises two movable touch knifes, 31, two contact knife spacers, 32, four groups of contacts and folds spring 33 and two rivets 34; Any movable touch knife 31 comprises two blades 311 being mutually 120 degree of angles and the contact knife pivoted housing 312 welded with described two blades 311; Described two movable touch knifes 31 are loaded in described rotating spindle assembly 2 behind axis two ends respectively symmetry; By described contact knife spacer 32 make described two movable touch knifes 31 exist both sides that fixed intervals ensure be electrically connected on described fixed contact 4 after rotation, again described contact is folded the outside that described two movable touch knifes 31 are located at respectively by spring 33, and fold contact pressure required when spring 33 ensures that two movable touch knifes 31 contact with fixed contact 4 by described rivet 34 compression contacts.

Described airtight insulative shell member 1 comprises three quiet end capping 11, airtight insulation crust of Y type 12, two side shell cappings 13, two moved end side covers 14, two side cover big envelopes 15, three stationary contact skulls 16 matched with the top of described fixed contact 4 matched with the outside of described fixed contact 4; The airtight insulation crust 12 of described Y type is provided with a body cavity 121, and this body cavity 121 is cylindric, and its radial direction is provided with three pilot holes 122; Described movable touch knife assembly 3 is located in body cavity 121, and is sealed in the axial two ends of body cavity 121 with described side shell capping 13 and described moved end side cover 14, and side shell capping 13 is positioned at the outer ring of described moved end side cover 14; Arbitrary described fixed contact 4 correspondence is arranged in a pilot hole 122, and is sealed in the outer end of pilot hole 122 with stationary contact skull 16 described in quiet end capping described in one 11 and, and described quiet end capping 11 is positioned at the outer ring of described stationary contact skull 16; And the outer end of described rotating spindle assembly 2 also seals by described moved end side cover 14; The described cylinder of resistance to arc shield 6 is attached to the inner surface of the body cavity 121 of the airtight insulation crust 12 of described Y type, and the described cylinder of resistance to arc shield 6 correspondence is provided with three through holes matched with described pilot hole 122, the size of through hole penetrates in the described cylinder of resistance to arc shield 6 for described fixed contact 4 just, and described arc-chute 5 can contact the inner ring of described through hole.

This vacuum rotating three-station switching tube includes airtight insulation system, conducting system, drive system, shielding harness, wherein airtight insulation system is the airtight insulative shell member 1 be made up of glass or pottery, comprise three quiet end cappings 11, an airtight insulation crust 12 of Y type, two stainless steel side shells capping 13, two moved end side covers 14, two side cover big envelopes 15, three stationary contact skulls 16, its building block is to dynamic, fixed contact plays insulating supporting effect, and the technology controlling and process of building block plays a decisive role to formation vacuum tube air-tightness, in addition when airtight insulative shell member 1 material selection structural strength preferably pottery time also just lose the advantage with visible fracture, this needs to select according to service condition, wherein drive system forms primarily of moving contact rotating shaft 21, rotary seal part 22, drive system also needs to have good sealing property concurrently except having good mechanical performance, movable sealing bearing 223 plays guide support effect, a pair sealing and the excellent polytetrafluoroethylene material movable sealing axle sleeve 221 of strength character and a pair are equipped with in its inside can high-low temperature resistant, high pressure resistant, corrosion-resistant, non-ageing O type metal o-ring 222, thus ensures to have reliable airtight insulation property, wherein conducting system folds spring 33 primarily of movable touch knife 31, contact knife spacer 32, contact, rivet 34, fixed contact 4 form, wherein contact knife spacer 32, contact fold spring 33, rivet 34 is for connecting two movable touch knifes 31, and make between two contacts, to maintain a rated pressure, reduce contact resistance when contacting with fixed contact as far as possible and keep stable and have the electronic repulsive force performance of good opposing when bearing dynamic current, wherein shielding harness is the shielding cylinder 6 being glued with high temperature resistant, the resistance to electric arc of one deck in Y type airtight insulation crust 12 inside of this vacuum rotating three-station switching tube, it uses ptfe composite material to make, metallic vapour and droplets that contact produces in arcing process can be alleviated to the pollution level of insulation crust inwall, thus avoid the dielectric strength causing vacuum arc extinguish chamber housing decline or produce flashover, in addition, in the both sides of each fixed contact 4, two arc-chutes 5 are housed, after the electric arc sucked being elongated, segmentation is extinguished, and prevents arc reignition.

As shown in Fig. 4 to Fig. 5, the present invention is vacuum rotating three-station switching tube, rotating three stations is the version that main arc contact adopts rotating knife chip, namely with the movable touch knife 31 of two butt welding junctor forms for center of rotation, three equal stationary distribution of independent fixed contact 4, on the excircle of the airtight insulation crust 12 of Y type, can form combined floodgate, isolation, ground connection three kinds of stations respectively when making movable touch knife assembly 3 turn to diverse location by rotating spindle assembly 2.The present invention can realize any two to can forming combined floodgate major loop during dynamic and static contact connection or connecting the different mode of communicating of grounded circuit these two kinds; And when dynamic and static contact separately mediates be the isolation station form of double-fracture, thus conveniently can be applicable to different electrical network inlet wire patterns; Secondly, the moved end side cover 14 of vacuum rotating three-station switching tube is clear glass, can obviously see isolated location fracture when switch separating brake, also has main contact to rotate and is directly being driven by intermediate rotary shaft, greatly reduce the total kilometres loss caused by the gap that is in transmission connection, improve transmission efficiency.

Operation principle of the present invention is as follows:

Moving contact rotating shaft 21 two ends work breach is rotated by outside input, driven by rotating spindle assembly 2 and rotate relative to fixed contact in manage with the movable touch knife assembly 3 of its assembling, reach vacuum switch tube can closing a floodgate, isolate, carry out order between ground connection three kinds of operating states and switch object.When described movable touch knife assembly 3 move to contact with any two described fixed contacts 4 and realize being electrically connected time, this vacuum rotating three-station switching tube is in closing position or earthing position; When described movable touch knife assembly 3 is in complete open position with described fixed contact 4, this vacuum rotating three-station switching tube is in and disconnects isolated location.If when described movable touch knife assembly 3 rotates along same rotation direction, during current once dynamic and static contact connection, state is combined floodgate major loop, when then, dynamic and static contact is once communicated with, state is connection grounded circuit, otherwise, when current once dynamic and static contact is communicated with, state is grounded circuit, then when after, dynamic and static contact is once communicated with, state is and connects combined floodgate major loop; And when dynamic and static contact separately mediates be the isolation station form of double-fracture.Be specially: closing operation order: earthing position---isolated location---closing position; Ground connection operating sequence: closing position---isolated location---earthing position.

Although the foregoing describe the specific embodiment of the present invention; but be familiar with those skilled in the art to be to be understood that; specific embodiment described by us is illustrative; instead of for the restriction to scope of the present invention; those of ordinary skill in the art, in the modification of the equivalence done according to spirit of the present invention and change, should be encompassed in scope that claim of the present invention protects.

Claims

1. a vacuum rotating three-station switching tube, is characterized in that: comprise an airtight insulative shell member, movable touch knife assembly, a rotating spindle assembly and three fixed contacts; Described movable touch knife assembly, described rotating spindle assembly, described fixed contact Vacuum Package are in described airtight insulative shell member; Described rotating spindle assembly is located on the central axis of described airtight insulative shell member; Described movable touch knife assembly can be located in described airtight insulative shell member by described rotating spindle assembly rotationally; Described three fixed contacts are evenly distributed in the outer ring of described airtight insulative shell member, and described movable touch knife assembly is rotarily driven by described rotating spindle assembly and can realize selecting and wherein a pair fixed contact synchronizing close.

2. a kind of vacuum rotating three-station switching tube according to claim 1, it is characterized in that: described movable touch knife assembly comprises two movable touch knifes, two contact knife spacers, four groups of contacts fold spring and two rivets, and any movable touch knife comprises two blades being mutually 120 degree of angles and the contact knife pivoted housing welded with described two blades; Described two movable touch knifes along axis two ends respectively symmetry load in described rotating spindle assembly; By described contact knife spacer make described two movable touch knifes exist both sides that fixed intervals ensure be electrically connected on described fixed contact after rotation, described contact is folded the outside that described two movable touch knifes are located at respectively by spring again, and fold contact pressure required when spring ensures that two movable touch knifes contact with fixed contact by described rivet compression contacts.

3. a kind of vacuum rotating three-station switching tube according to claim 1, it is characterized in that: described rotating spindle assembly comprises a moving contact rotating shaft and two rotary seal parts, any one rotary seal part comprises a movable sealing axle sleeve, two O type metal o-rings and two movable sealing bearings; Described two rotary seal partial symmetry are distributed in the both sides of described moving contact rotating shaft; Described moving contact rotating shaft is positioned on the central axis of described airtight insulative shell member by two rotary seal parts; Described movable sealing axle sleeve internal symmetry arranges two described movable sealing bearings and two described O type metal o-rings.

4. a kind of vacuum rotating three-station switching tube according to claim 1, is characterized in that: described airtight insulative shell member comprises three quiet end cappings matched with the outside of described fixed contact, an airtight insulation crust of Y type, the capping of two side shells, two moved end side covers, two side cover big envelopes; The airtight insulation crust of described Y type is provided with a body cavity, and on this body cavity, radial direction is provided with three pilot holes; Described movable touch knife assembly is located in body cavity, and is sealed in the axial two ends of body cavity with the capping of described side shell and described moved end side cover, and the capping of side shell is positioned at the outer ring of described moved end side cover; Arbitrary described fixed contact correspondence is arranged in a pilot hole, and is sealed in the outer end of pilot hole with stationary contact skull described in end capping quiet described in one and, and described quiet end capping is positioned at the outer ring of described stationary contact skull; And the outer end of described rotating spindle assembly also seals by described moved end side cover.

5. a kind of vacuum rotating three-station switching tube according to claim 1, is characterized in that: also comprise six arc-chutes, described arc-chute is located at the both sides of described fixed contact respectively.

6. a kind of vacuum rotating three-station switching tube according to claim 4, it is characterized in that: also comprise a cylinder of resistance to arc shield, the described cylinder of resistance to arc shield is attached to the inner surface of the body cavity of the airtight insulation crust of described Y type, and the described cylinder of resistance to arc shield correspondence is provided with three through holes matched with described pilot hole, the size of through hole penetrates in the described cylinder of resistance to arc shield for described fixed contact just, and described arc-chute can contact the inner ring of described through hole.

7. a kind of vacuum rotating three-station switching tube according to claim 1, is characterized in that: described body cavity is for cylindric.