CN114628177A - Isolating switch for preventing zero-breaking fault - Google Patents
Isolating switch for preventing zero-breaking fault Download PDFInfo
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- CN114628177A CN114628177A CN202210239638.5A CN202210239638A CN114628177A CN 114628177 A CN114628177 A CN 114628177A CN 202210239638 A CN202210239638 A CN 202210239638A CN 114628177 A CN114628177 A CN 114628177A
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- 230000003068 static effect Effects 0.000 claims abstract description 81
- 230000007246 mechanism Effects 0.000 claims abstract description 31
- 238000009434 installation Methods 0.000 claims abstract description 18
- 230000017525 heat dissipation Effects 0.000 claims description 21
- 238000005192 partition Methods 0.000 claims description 16
- 230000000149 penetrating effect Effects 0.000 claims description 9
- 230000009471 action Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 238000000926 separation method Methods 0.000 description 3
- 108090000565 Capsid Proteins Proteins 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/52—Cooling of switch parts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/008—Pedestal mounted switch gear combinations
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
Abstract
The invention relates to an isolating switch for preventing zero-breaking faults, which comprises a switch shell, a switching-on and switching-off mechanism, an N pole contact and an L pole contact, wherein the switching-on and switching-off mechanism comprises a handle part, a connecting piece, a first movable contact plate, a second movable contact plate, a first static contact group and a second static contact group; the first movable contact plate is provided with an L-pole contact, and the second movable contact plate is provided with an N-pole contact; the first movable contact board and the second movable contact board are arranged on the connecting piece, and the installation height of the second movable contact board is lower than that of the first movable contact board. The handle portion can drive the connecting piece, before the first static contact group of L utmost point contact, makes N utmost point contact second static contact group earlier, breaks away from first static contact group back at L utmost point contact, makes N utmost point contact break away from second static contact group again. The installation height of the N pole contact is lower than that of the L pole contact, and the N pole contact is firstly closed and then opened through the height difference, so that the problem of zero breaking fault of the isolating switch at the moment of opening or closing can be prevented.
Description
Technical Field
The invention relates to the field of isolating switches, in particular to an isolating switch for preventing zero-breaking faults.
Background
The isolating switch is a switch device which is mainly used for isolating a power supply and switching over, is used for connecting and cutting off a small current circuit and has no arc extinguishing function. When the isolating switch is in the separated position, the contacts have insulation distance meeting the specified requirements and obvious disconnection marks; a switching device capable of carrying current in normal loop conditions and current in abnormal conditions for a specified time when in the closed position.
The isolating switch wiring comprises a zero line N and a live line L. At the moment when the isolating switch is switched on or off, if the N line is cut off and the live line is connected, the use safety of the line is seriously influenced, and the fault is called a zero-breaking fault or zero-missing fault.
Some electrical equipment N lines are not provided with current tripping elements, electric arcs can be generated on contacts which are firstly opened or closed later in the opening and closing processes of the electrical equipment, and the phase lines are provided with the current tripping elements, so that the electrical equipment can quickly respond to overload and short circuit, and the safety of circuits and equipment is ensured; even in the electrical equipment with the current tripping element arranged on the N line, if the electrical equipment is subjected to virtual closing or virtual opening, the N line is closed first and then opened, so that the N line can only be in a closing state or the N line is not completely opened, and although the electrical equipment is not completely opened and closed, the condition that only the N line is connected with a load is ensured, and the danger of electric shock during overhaul of an operator is avoided.
Disclosure of Invention
The present invention is directed to a disconnector for preventing a zero-fault, which solves the above-mentioned problems of the prior art.
The invention provides the following technical scheme: the isolating switch for preventing zero-breaking faults comprises a switch shell, a switching-on and switching-off mechanism arranged in the switch shell, a plurality of N pole contacts and a plurality of L pole contacts. The switching-on and switching-off mechanism comprises a handle part, a connecting piece, a first movable contact plate, a second movable contact plate, a first static contact group and a second static contact group, the handle part is arranged at the upper end of the switch shell, the upper end of the handle part is exposed, and an operator can swing the handle part to realize the switching-off and switching-on operations of the isolating switch. The connecting piece is arranged at the lower end of the handle part, and the first movable contact board and the second movable contact board are arranged on the connecting piece. The first movable contact plate is provided with an L-pole contact, the second movable contact plate is provided with an N-pole contact, and the installation height of the second movable contact plate is lower than that of the first movable contact plate, so that the installation height of the N-pole contact is lower than that of the L-pole contact. The first static contact group and the second static contact group are fixedly arranged on the switch shell in equal height and respectively correspond to the first movable contact board and the second movable contact board for use. The handle part can drive the connecting piece, and the first movable contact plate and the second movable contact plate move along with the connecting piece; when the switch is switched on, before the L-pole contact on the first movable contact plate contacts the first fixed contact group, the N-pole contact on the second movable contact plate contacts the second fixed contact group firstly; and during switching off, after the L-pole contact on the first movable contact plate is separated from the first fixed contact group, the N-pole contact on the second movable contact plate is separated from the second fixed contact group. Therefore, the N pole contact is firstly closed and then separated, the zero line is prevented from being broken, and the zero breaking fault is effectively prevented.
Further, the connecting piece comprises a first connecting rod, a second connecting rod, a first frame, a second frame, a first main contact spring, a second main contact spring, a first return spring and a second return spring. The lower end of the handle part is respectively hinged with the upper ends of the first connecting rod and the second connecting rod and can drive the first connecting rod and the second connecting rod to swing. The lower end of the first connecting rod is hinged to the upper end of a first frame, a first main contact spring and a first movable contact plate are arranged on the upper section of the first frame, a first reset spring is arranged on the middle-lower section of the first frame, the first main contact spring, the first movable contact plate and the first reset spring are sequentially arranged from top to bottom, and the first reset spring is directly contacted with the middle part of the first frame, is not contacted with the first movable contact plate and is used for jacking the first movable contact plate to reset the first movable contact plate. The first movable contact plate can move up and down with the first frame. The second connecting rod, the second frame, the second main contact spring, the second reset spring, the second movable contact board and the second fixed contact group are correspondingly arranged, and the second main contact spring presses the second movable contact board downwards to enable the installation height of the second movable contact board to be lower than that of the first movable contact board, so that the installation height of the N-pole contact is lower than that of the L-pole contact. When the handle part acts to switch on, the N pole contact of the second movable contact plate at the lower end contacts with the second static contact group firstly, when the handle part acts to switch off, the L pole contact on the first movable contact plate is separated from the first static contact group firstly, and the N pole contact on the second movable contact plate is separated from the second static contact group later, so that the separation after the N pole contact is switched on firstly is realized.
Furthermore, the first frame comprises a second through groove, a first upper chamber, a lower chamber and a partition plate, the upper end of the first frame is a triangular prism which is longitudinally arranged, and the second through groove is longitudinally formed. The lower end of the first connecting rod is horizontally inserted into the second through groove, the lower end of the second through groove is sequentially provided with a first upper cavity and a lower cavity, and a partition plate is arranged between the first upper cavity and the lower cavity to separate the first upper cavity and the lower cavity. The lower end of the first movable contact plate is tightly attached to the partition plate, the middle of the first movable contact plate horizontally penetrates through the first upper cavity, and the upper end of the first movable contact plate is provided with a first main contact spring. The upper end of the first main contact spring is abutted to the top wall of the first upper cavity, the first connecting rod swings, the first frame is pressed downwards to enable the first main contact spring to be compressed and the first movable contact plate to be pressed downwards, and then the first movable contact plate is contacted with the first static contact group to achieve closing. The lower end of the partition board is convexly provided with a convex block, the second reset spring is arranged in the lower cavity, the upper end of the second reset spring is arranged on the convex block and is in contact with the partition board, the lower end of the second reset spring is tightly attached to the switch shell, when the first connecting rod swings upwards, the first movable contact board moves upwards along with the first frame under the action of the reset spring and the first main contact spring, and the first movable contact board is separated from the first static contact group to realize opening. The second frame has the same structure as the first frame, the action principle of the second frame is the same as that of the first frame, the second frame comprises a second upper cavity, the installation height of the second frame relative to the switch shell is lower than that of the first frame, and the bottom surface of the second upper cavity is lower than that of the first upper cavity, so that the installation height of the second movable contact plate is lower than that of the first movable contact plate, and the installation height of the N-pole contact is lower than that of the L-pole contact.
Further, a static pole is respectively arranged at two ends of the first static contact group, the static pole corresponds to the L-pole contact and can be contacted with and separated from each other, the structure of the second static contact group is the same as that of the first static contact group, the two static poles of the second static contact group can be contacted with or separated from the N-pole contact, and the opening or closing of the isolating switch is completed through the contact or separation of the static poles with the L-pole contact and the N-pole contact.
Furthermore, the first movable contact board is plate-shaped, the middle of the first movable contact board is narrow, the two ends of the first movable contact board are wide, the middle part of the first movable contact board penetrates through the first upper cavity, the two ends of the first movable contact board are respectively provided with a first through hole, and the L-pole contact is installed on the first movable contact board. The second movable contact plate has the same structure as the first movable contact plate, and N pole contacts are respectively arranged at two ends of the second movable contact plate.
Further, the middle parts of the first static contact group and the second static contact group are fixedly installed on the switch shell, one ends of the first static contact group and the second static contact group extend upwards to form wiring terminals, and the wiring terminals are provided with wiring ports at the switch shell. The operator connects the wires through the wire connection port.
Furthermore, the wiring end is a wiring screw, and the outer ends of the first static contact group and the second static contact group are fixedly connected with the wiring screw.
Further, the isolator who prevents zero-breaking fault still includes arc extinguishing mechanism, arc extinguishing mechanism includes resistant arc piece and the explosion chamber that a plurality of equidistance intervals set up, resistant arc piece is the arc setting in quiet utmost point contact surface upper end, and follows supreme size grow in proper order down, forms the longitudinal joint arc extinguishing. And a hollow chamber is arranged at the position of the switch shell far away from the static pole and is used as an arc extinguish chamber. When the static pole contacts or separates from the L-pole contact and the N-pole contact, electric arcs can be generated, enter the arc extinguishing chamber after being stretched, are cooled and extinguished after contacting with the arc-resistant sheet, and are suitable for the arc extinguishing of the isolating switch.
Further, arc extinguishing mechanism still includes venthole, first air outlet channel and second air outlet channel, the explosion chamber is kept away from arc-resistant piece one side and is seted up the second through-hole and connect the end switch-on, and the end is as first air outlet channel. First stationary contact group and the fretwork of second stationary contact group lower extreme extend to switch housing side, give vent to anger the passageway as the second. When the static pole contacts with or separates from the L pole contact and the N pole contact to generate electric arcs, a large amount of heat can be generated, the heat is respectively diffused to the first air outlet channel and the second air outlet channel and finally flows out from the air outlet holes, and the heat dissipation inside the switch shell is facilitated.
Furthermore, the switch shell further comprises a front shell, a middle shell and a rear shell, wherein the front shell and the rear shell respectively wrap the front side and the rear side of the opening and closing mechanism, the front surface of the front shell transversely penetrates through the front shell to form a first heat dissipation groove, and the rear surface of the rear shell transversely penetrates through the rear shell to form a second heat dissipation groove. The middle shell is arranged between the front shell and the rear shell, the arc extinguish chamber is arranged on the middle shell, the middle shell divides the switching mechanism into two contact chambers, the first connecting rod, the first frame, the first main contact spring, the first reset spring, the first movable contact plate, the first static contact group, the second connecting rod, the second frame, the second main contact spring, the second movable contact plate, the second reset spring and the second static contact group are respectively arranged on the middle shell, a plurality of third through holes are arranged in the front and the rear of the switch shell in a penetrating mode, and the third through holes are used for connecting a plurality of switch shells to form a switch group. Through first heat dissipation recess and second heat dissipation recess for the switch casing of front and back connection forms the passageway of circulation of air, is favorable to strengthening switch casing's heat dispersion.
Compared with the prior art, the invention has the following beneficial effects:
1. the installation height of the N pole contact is lower than that of the L pole contact, the N pole contact can be closed first and then separated through the height difference, when the handle part acts to close, the N pole contact on the second movable contact plate at the lower end is contacted with the second fixed contact group first, and then the L pole contact on the first movable contact plate is contacted with the first fixed contact group; when the handle part acts to open the brake, the N pole contact on the second movable contact plate at the lower end is separated from the second static contact group, and the L pole contact on the first movable contact plate is separated from the first static contact group, so that the N pole contact is separated after being closed, the zero line is prevented from being broken, and the zero line breaking fault is effectively prevented.
2. The arc extinguishing mechanism is arranged, when the static pole contacts or is separated from the N pole contact and the L pole contact, a large amount of electric arcs can be generated, the electric arcs enter the arc extinguishing chamber after being elongated through the arc extinguishing mechanism, the electric arcs are cooled and extinguished after being contacted with the arc resistant sheet, and the arc extinguishing mechanism is suitable for effective arc extinguishing of the isolating switch.
3. The arc extinguishing mechanism is provided with the air outlet, when the static pole contacts the N pole contact and the L pole contact or breaks away from the generated electric arc, a large amount of heat can be generated, the heat is respectively diffused to the first air outlet channel and the second air outlet channel, and finally flows out from the air outlet, so that the heat dissipation inside the switch shell is facilitated.
4. Through holes are formed in the front and the back of the switch shell in a penetrating mode, the through holes can be sequentially connected with the switch shells in the front and the back to form a switch group, and a plurality of groups of isolating switches can be conveniently used together; switch housing sets up procapsid, well casing and back casing, and first heat dissipation recess is transversely seted up to the front surface of procapsid, and second heat dissipation recess is transversely seted up to the back surface of back casing, through first heat dissipation recess and second heat dissipation recess for the switch housing who connects around forms the passageway of circulation of air, is favorable to strengthening switch housing's heat dispersion.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic three-dimensional external view of a zero-fault protected isolator switch of the present invention;
FIG. 2 is a schematic view of a feature of the isolating switch of the present invention for preventing a zero-breaking fault;
FIG. 3 is a three-dimensional schematic diagram of the opening and closing mechanism of the isolating switch for preventing the zero-breaking fault according to the invention;
FIG. 4 is a front view of the closing and opening mechanism of the isolating switch of the present invention for preventing the zero-break fault;
FIG. 5 is a top view of the disconnect switch of the present invention preventing a zero-fault;
in the figure: 1. a switch housing; 2. an N-pole contact; 3. an L-pole contact; 4. a handle portion; 401. a handle head; 402. a rotating body; 403. a connector; 501. a first connecting rod; 502. a second connecting rod; 601. a first frame; 602. a second frame; 6011. a first upper chamber; 6012. a lower chamber; 6013. a partition plate; 6021. a second upper chamber; 701. a first main contact spring; 702. a second main contact spring; 801. a first return spring; 802. a second return spring; 901. a first movable contact plate; 902. a second movable contact plate; 101. a first set of stationary contacts; 102. a second stationary contact set; 103. a front housing; 104. a middle shell; 105. a rear housing; 106. a first heat dissipation groove; 107. a third through hole; 11. a terminal; 12. a wiring port; 13. an arc-resistant sheet; 14. an arc extinguishing chamber; 15. an air outlet; 16. a first air outlet channel; 17. and a second air outlet channel.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1-5, the present invention provides the following technical solutions: the invention discloses an isolating switch for preventing zero-breaking faults, which comprises a switch shell 1, a switching-on and switching-off mechanism, an arc extinguishing mechanism, two groups of N pole contacts 2 and two groups of L pole contacts 3, wherein the switching-on and switching-off mechanism and the arc extinguishing mechanism are arranged in the switch shell 1. The switching mechanism comprises a handle part 4, a connecting piece, a first movable contact board 901, a second movable contact board 902, a first fixed contact group 101 and a second fixed contact group 102. Handle portion 4 sets up in switch housing 1 upper end, and handle portion 4 upper end exposes, and the operator realizes isolator's separating brake and closing operation through swing handle portion 4. The connector is arranged at the lower end of the handle part 4, and the first movable contact board 901 and the second movable contact board 902 are arranged on the connector. Two ends of the first movable contact plate 901 are respectively provided with a group of L pole contacts 3, two ends of the second movable contact plate 902 are respectively provided with a group of N pole contacts 2, and the installation height of the second movable contact plate 902 is lower than that of the first movable contact plate 901, so that the installation height of the N pole contacts 2 is lower than that of the L pole contacts 3. The first fixed contact group 101 and the second fixed contact group 102 are fixedly mounted on the switch housing 1 at equal heights and are used corresponding to the first movable contact board 901 and the second movable contact board 902, respectively. The handle part 4 can drive the connecting piece, and the first movable contact board 901 and the second movable contact board 902 move along with the connecting piece. The connector includes a first connection rod 501, a second connection rod 502, a first frame 601, a second frame 602, a first main contact spring 701, a second main contact spring 702, a first return spring 801, and a second return spring 802. The lower end of the handle part 4 is hinged to the upper ends of the first connecting rod 501 and the second connecting rod 502 respectively, and can drive the first connecting rod 501 and the second connecting rod 502 to swing at the same time, and the lower end of the first connecting rod 501 is hinged to the upper end of the first frame 601. The first frame 601 is provided with a first main contact spring 701 and a first movable contact plate 901 at an upper section, a first return spring 801 at a middle section, and the first main contact spring 701, the first movable contact plate 901 and the first return spring 801 are sequentially arranged from top to bottom, wherein the first return spring 801 directly contacts with the middle part of the first frame 601 without contacting with the first movable contact plate 901, and is used for jacking up the first movable contact plate 901 to return. The first movable contact plate 901 can move up and down with the first frame 601. The second connecting rod 502, the second frame 602, the second main contact spring 702, the second return spring 802, the second movable contact plate 902, and the second stationary contact group 102 are correspondingly disposed. The second main contact spring 702 presses down the second movable contact plate 902 so that the mounting height of the second movable contact plate 902 is lower than that of the first movable contact plate 901, thereby making the mounting height of the N-pole contact 2 lower than that of the L-pole contact 3. When the handle part 4 acts to close, the N-pole contact 2 on the second movable contact plate 902 at the lower end contacts with the second fixed contact group 102 first, and when the handle part 4 acts to open, the L-pole contact 3 on the first movable contact plate 901 separates from the first fixed contact group 101 first, and the N-pole contact 2 on the second movable contact plate 902 separates from the second fixed contact group 102 later, so that the N-pole contact 2 is firstly closed and then separated, and zero-breaking faults are effectively prevented.
The first frame 601 comprises a second through groove, a first upper chamber 6011, a lower chamber 6012 and a partition 6013, the upper end of the first frame 601 is a triangular column which is longitudinally arranged, the second through groove is longitudinally formed, and the lower end of the first connecting rod 501 is horizontally inserted into the second through groove. The lower end of the second through groove is sequentially provided with a first upper chamber 6011 and a lower chamber 6012, a partition 6013 is arranged between the first upper chamber 6011 and the lower chamber 6012 to separate the two chambers, the lower end of the lower chamber 6012 is provided with an opening, and the first upper chamber 6011 and the lower chamber 6012 integrally form a cuboid. The lower end of the first movable contact plate 901 is tightly attached to the partition plate 6013, the middle horizontally and transversely penetrates through the first upper chamber 6011, the upper end of the first main contact spring 701 is provided with a first main contact spring 701, the upper end of the first main contact spring 701 abuts against the top wall of the first upper chamber 6011, the first main contact spring 701 is pressed down by swinging of the first connecting rod 501, the first frame 601 is pressed down to enable the first main contact spring 701 to be compressed and the first movable contact plate 901 to be pressed down, and then the first movable contact plate 901 is in contact with the first fixed contact group 101, so that closing is achieved. A cylindrical bump is convexly arranged at the lower end of the partition 6013, the second return spring 802 is arranged in the lower chamber 6012, the upper end of the second return spring 802 is sleeved on the bump and is in contact with the partition 6013, the lower end of the second return spring 802 is tightly attached to the switch shell 1, when the first connecting rod 501 swings upwards, the first movable contact plate 901 moves upwards along with the first frame 601 under the action of the return spring and the first main contact spring 701, and the first movable contact plate 901 is separated from the first fixed contact group 101 to achieve opening. The second frame 602 has the same structure as the first frame 601, has the same operation principle as the first frame 601, and includes a second upper chamber 6021, in which the installation height of the second frame 602 with respect to the switch housing 1 is lower than that of the first frame 601, and the bottom height of the second upper chamber 9021 is lower than that of the first upper chamber 6011, so that the installation height of the second movable contact plate 902 is lower than that of the first movable contact plate 901, and further, the installation height of the N-pole contact 2 is lower than that of the L-pole contact 3.
Two ends of the first static contact group 101 are respectively provided with a static pole, the static poles correspond to the L pole contacts 3 and can be contacted with and separated from each other, the structure of the second static contact group 102 is the same as that of the first static contact group 101, the two static poles of the second static contact group 102 can be contacted with or separated from the N pole contacts, and the opening or closing of the isolating switch is completed through the contact or separation of the static poles with the L pole contacts 3 and the N pole contacts 2.
The first movable contact plate 901 is plate-shaped, has a narrow middle part and wide two ends, the middle part is installed on the first upper chamber 6011 in a penetrating manner, and the two ends are respectively provided with a first through hole and are installed with the L-pole contacts 3. The second movable contact plate 902 has the same structure as the first movable contact plate 901, and N-pole contacts 2 are mounted at both ends thereof, respectively.
The first connecting rod 501 and the second connecting rod 502 are both U-shaped rods, the cross sections of the first connecting rod 501 and the second connecting rod 502 are circular, the upper ends of the first connecting rod 501 and the second connecting rod 502 are respectively horizontally inserted into the first through grooves of the two groups of connectors 403 to form hinge joints, the middle of the first connecting rod swings vertically, and the lower ends of the first connecting rod and the second connecting rod are respectively horizontally inserted into the upper ends of the first frame 601 and the second frame 602 to form hinge joints. The first connecting rod 501 and the second connecting rod 502 are simple in structure, easy to process and use, convenient to connect the two groups of connectors 403 with the first frame 601 and the second frame 602, and stable and reliable in structure.
The middle parts of the first fixed contact group 101 and the second fixed contact group 102 are fixedly installed on the switch shell 1, the outer ends of the first fixed contact group and the second fixed contact group extend upwards to form terminals 11, the terminals 11 are provided with wiring ports 12 at the switch shell 1, and an operator performs wiring through the wiring ports 12. The wiring terminal 11 is the mounting hole of binding screw, and first stationary contact group 101 and the outer end of second stationary contact group 102 and binding screw 11 fixed connection, the lower extreme of binding screw 11 passes this mounting hole and is connected with the wiring frame electricity screw thread of adaptation.
The arc extinguishing mechanism comprises two groups of arc-resistant pieces 13 arranged at equal intervals, an arc extinguishing chamber 14, an air outlet hole 15, a first air outlet channel 16 and a second air outlet channel 17. The upper ends of the first fixed contact group 101 and the second fixed contact group 102 are respectively provided with a group of arc extinguishing mechanisms. The arc-resistant pieces 13 are arc-shaped, all the arc-resistant pieces 13 are concentrically arranged, the central angle is 90 degrees, a fan-shaped arc extinguishing area is formed jointly, the arc-resistant pieces 13 are arranged at the upper end of the contact surface of the static pole, the lower ends of the arc-resistant pieces 13 are not more than the middle part of the first static contact group 101, and the arc-resistant pieces 13 completely cover the L-pole contact, the N-pole contact and the action area thereof. Six arc-resistant pieces 13 are arranged in each group, the sizes of the arc-resistant pieces are sequentially increased from bottom to top, longitudinal seam arc extinction is formed, the widths of two groups of arc-resistant pieces 13 arranged at the lower end are smaller than those of four groups of arc-resistant pieces 13 arranged at the upper end, and a space for avoiding actions of the first movable contact plate 901 and the second movable contact plate 902 is reserved for the four groups of arc-resistant pieces 13 arranged at the upper end. The switch shell 1 is provided with a hollow chamber as an arc extinguish chamber 14 at the position far away from the contact surface of the static pole. When the static pole contacts or separates from the L-pole contact 3 and the N-pole contact 2, electric arcs can be generated, the electric arcs enter the arc extinguishing chamber 14 after being elongated, and are cooled and extinguished after contacting the arc-resistant sheet 13 to form longitudinal seam arc extinguishing, and the longitudinal seam arc extinguishing is suitable for effective arc extinguishing of the isolating switch. And a second through hole is formed on one side of the arc extinguishing chamber 14 far away from the arc-resistant sheet 13 and is communicated with the terminal 11, and the terminal 11 is used as a first air outlet channel 16. The lower ends of the first static contact group 101 and the second static contact group 102 are hollow and extend to the side of the switch housing 1 to serve as a second air outlet channel 17. When the static pole contacts with or separates from the L-pole contact 3 and the N-pole contact 2 to generate electric arcs, a large amount of heat is generated, and the heat is respectively diffused to the first air outlet channel 16 and the second air outlet channel 17 and finally flows out from the air outlet hole 15, so that the heat dissipation inside the switch shell 1 is facilitated.
The switch housing 1 comprises a front housing 103, a middle housing 104 and a rear housing 105, wherein the front housing 103 and the rear housing 105 respectively wrap the front side and the rear side of the switching-on/off mechanism, a first heat dissipation groove 106 transversely penetrates through the front surface of the front housing 103, and a second heat dissipation groove transversely penetrates through the rear surface of the rear housing 105. The first heat dissipation groove 106 and the second heat dissipation groove are both 0.3mm deep. The middle housing 104 is disposed between the front housing 103 and the rear housing 105, and the arc extinguishing chamber 14 is mounted on the middle housing 104. The middle housing 104 divides the switching mechanism into two contact chambers, and is respectively provided with a first connecting rod 501, a first frame 601, a first main contact spring 701, a first return spring 801, a first movable contact plate 901, a first stationary contact group 101, a second connecting rod 502, a second frame 602, a second main contact spring 702, a second movable contact plate 902, a second return spring 802 and a second stationary contact group 102, four sets of third through holes 107 are arranged in the front and back of the switch housing 1 in a penetrating manner, and a plurality of switch housings 1 can be sequentially connected in the front and back by penetrating the third through holes 107 through screws to form a switch group. Through the first heat dissipation groove 106 and the second heat dissipation groove, the switch housing 1 connected in the front and back forms a channel for air circulation, which is beneficial to enhancing the heat dissipation performance of the switch housing 1.
The working principle is as follows:
1. closing: an operator swings the handle part 4 leftwards to expose the I/ON icon, so that the handle head 401 and the connecting head 403 swing around the rotating body 402, the connecting head 403 can move downwards in the swinging process, and thus the first connecting rod 501 and the second connecting rod 502 are pulled downwards, the first connecting rod 501 and the second connecting rod 502 drive the first frame 601 and the second frame 602, and the first frame 601 and the second frame 602 drive the first movable contact board 901 and the second movable contact board 902 to be respectively contacted with the first fixed contact group 101 and the second fixed contact group 102; the N-pole contact 2 on the second movable contact plate 902 located at the lower end contacts with the static pole on the second static contact group 102 first, and then the L-pole contact on the first movable contact plate 901 contacts with the static pole on the first static contact group 101, so that the first closing action of the N-pole contact 2 is realized.
2. Opening a brake: an operator swings the handle part 4 rightwards to expose an O/OFF icon, so that the handle head 401 and the connecting head 403 swing around the rotating body 402, the connecting head 403 can move upwards in the swinging process, the first connecting rod 501 and the second connecting rod 502 are pulled upwards, the first connecting rod 501 and the second connecting rod 502 drive the first frame 601 and the second frame 602, and the first frame 601 and the second frame 602 drive the first movable contact board 901 and the second movable contact board 902 to be separated from the first fixed contact group 101 and the second fixed contact group 102 respectively; the N-pole contact 2 on the second movable contact plate 902 located at the lower end is separated from the static pole on the second static contact group 102, and the L-pole contact 3 on the first movable contact plate 901 is separated from the static pole on the first static contact group 101, so that the back opening action of the N-pole contact 2 is realized.
It is noted that, in this document, relational terms such as front, back, up, down, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. Prevent isolator of zero-breaking fault, including switch housing (1) and the divide-shut brake mechanism of setting in switch housing (1), its characterized in that: the switching mechanism comprises a handle part (4), a connecting piece, a first movable contact plate (901), a second movable contact plate (902), a first static contact group (101) and a second static contact group (102); the handle part (4) is arranged at the upper end of the switch shell (1); the connecting piece is arranged at the lower end of the handle part (4), and the first movable contact board (901) and the second movable contact board (902) are arranged on the connecting piece; an L-pole contact (3) is arranged on the first movable contact plate (901), an N-pole contact (2) is arranged on the second movable contact plate (902), and the installation height of the second movable contact plate (902) is lower than that of the first movable contact plate (901), so that the installation height of the N-pole contact (2) is lower than that of the L-pole contact (3); the first fixed contact group (101) and the second fixed contact group (102) are fixedly arranged on the switch shell (1) in the same height and are respectively used corresponding to the first movable contact plate (901) and the second movable contact plate (902); the handle part (4) can drive the connecting piece, and the first movable contact board (901) and the second movable contact board (902) move along with the connecting piece; when the switch is switched on, before the L-pole contact (3) is contacted with the first static contact group (101), the N-pole contact (2) is contacted with the second static contact group (102) firstly; when the switch is switched off, the N pole contact (2) is separated from the second static contact group (102) again after the L pole contact (3) is separated from the first static contact group (101).
2. The zero-breaking fault protection disconnector according to claim 1, wherein: the connecting piece comprises a first connecting rod (501), a second connecting rod (502), a first frame (601), a second frame (602), a first main contact spring (701), a second main contact spring (702), a first return spring (801) and a second return spring (802); the lower end of the handle part (4) is movably connected with the upper ends of the first connecting rod (501) and the second connecting rod (502) respectively, and can drive the first connecting rod (501) and the second connecting rod (502) to swing; the lower end of the first connecting rod (501) is movably connected with the upper end of a first frame (601), a first main contact spring (701) and a first movable contact plate (901) are arranged at the upper section of the first frame (601), a first return spring (801) is arranged at the middle-lower section of the first frame (601), and the first return spring (801) is directly contacted with the middle part of the first frame (601); the first movable contact plate (901) can move up and down along with the first frame (601); the second connecting rod (502), the second frame (602), the second main contact spring (702), the second reset spring (802), the second movable contact board (902) and the second fixed contact group (102) are correspondingly arranged, and the second main contact spring (702) presses the second movable contact board (902) downwards, so that the mounting height of the second movable contact board (902) is lower than that of the first movable contact board (901), and the mounting height of the N-pole contact (2) is lower than that of the L-pole contact (3).
3. The zero-breaking fault preventing disconnector according to claim 2, wherein: the first frame (601) comprises a second through groove, a first upper chamber (6011), a lower chamber (6012) and a partition plate (6013), the second through groove is longitudinally formed in the first frame (601), the lower end of a first connecting rod (501) is horizontally inserted into the second through groove, the first upper chamber (6011) and the lower chamber (6012) are sequentially formed at the lower end of the second through groove, and the partition plate (6013) is arranged between the first upper chamber (6011) and the lower chamber (6012) to separate the first upper chamber (6011) and the lower chamber (6012); the lower end of the first movable contact plate (901) is tightly attached to the partition plate (6013), the middle of the first movable contact plate horizontally and transversely penetrates through the first upper chamber (6011), the upper end of the first movable contact plate is provided with a first main contact spring (701), and the upper end of the first main contact spring (701) abuts against the top wall of the first upper chamber (6011); a bump is convexly arranged at the lower end of the partition plate (6013), the second return spring (802) is arranged in the lower chamber (6012), the upper end of the second return spring is arranged on the bump and is in contact with the partition plate (6013), and the lower end of the second return spring is tightly attached to the switch shell (1); the second frame (602) has the same structure as the first frame (601) and comprises a second upper chamber (6021), the installation height of the second frame (602) relative to the switch shell (1) is lower than that of the first frame (601), and the bottom surface of the second upper chamber (6021) is lower than that of the first upper chamber (6011).
4. The zero-breaking fault preventing disconnector according to claim 3, wherein: two ends of the first static contact group (101) are respectively provided with a static pole, and the static poles can be contacted with or separated from the L-pole contact (3); the second static contact group (102) is identical to the first static contact group (101) in structure.
5. The zero-breaking fault protection disconnector according to claim 4, wherein: the middle of the first movable contact plate (901) is narrow, the two ends of the first movable contact plate are wide, the middle part of the first movable contact plate is arranged on the first upper cavity (6011) in a penetrating mode, the two ends of the first movable contact plate are respectively provided with a first through hole, and L-pole contacts (3) are arranged on the two ends of the first movable contact plate; the second movable contact board (902) and the first movable contact board (901) have the same structure, and N pole contacts (2) are respectively arranged at two ends of the second movable contact board.
6. The zero-breaking fault protection disconnector according to claim 5, wherein: the middle parts of the first static contact group (101) and the second static contact group (102) are fixedly arranged on the switch shell (1), and one end of the first static contact group extends upwards to be provided with a terminal (11); the terminal (11) is provided with a terminal opening (12) at the switch shell (1).
7. The zero-breaking fault protection disconnector according to claim 6, wherein: the wiring terminal (11) is a wiring screw, and the outer ends of the first static contact group (101) and the second static contact group (102) are fixedly connected with the wiring screw.
8. The zero-breaking fault protection disconnector according to claim 6, wherein: the isolating switch for preventing the zero-breaking fault further comprises an arc extinguishing mechanism, the arc extinguishing mechanism comprises a plurality of arc-resistant pieces (13) and an arc extinguishing chamber (14), the arc-resistant pieces (13) are arranged at equal intervals, are arranged at the upper end of the static pole contact surface in an arc shape, and are sequentially increased in size from bottom to top to form longitudinal seam arc extinguishing; the switch shell (1) is far away from the static pole and is provided with a hollow chamber as an arc extinguish chamber (14).
9. The zero-breaking fault protection disconnector according to claim 8, wherein: the arc extinguishing mechanism further comprises an air outlet hole (15), a first air outlet channel (16) and a second air outlet channel (17), a second through hole (17) is formed in one side, away from the arc-resistant sheet (13), of the arc extinguishing chamber (14) and communicated with the arc extinguishing chamber, and the wiring terminal (11) serves as the first air outlet channel (16); and the lower ends of the first static contact group (101) and the second static contact group (102) are hollowed out and extend to the side surface of the switch shell (1) to serve as a second air outlet channel (17).
10. The zero-breaking fault protection disconnector according to claim 8, wherein: the switch shell (1) further comprises a front shell (103), a middle shell (104) and a rear shell (105), wherein the front shell (103) and the rear shell (105) respectively wrap the front side and the rear side of the switching-closing mechanism, a first heat dissipation groove (106) is transversely formed in the front surface of the front shell (103) in a penetrating mode, and a second heat dissipation groove is transversely formed in the rear surface of the rear shell (105) in a penetrating mode; the middle shell (104) is arranged between the front shell (103) and the rear shell (105), the arc extinguish chamber (14) is installed on the middle shell (104), the middle shell (104) divides the switching mechanism into two contact chambers, and a first connecting rod (501), a first frame (601), a first main contact spring (701), a first reset spring (801), a first movable contact plate (901), a first fixed contact group (101), a second connecting rod (502), a second frame (602), a second main contact spring (702), a second movable contact plate (902), a second reset spring (802) and a second fixed contact group (102) are respectively installed on the middle shell (104); the switch shell (1) is provided with a plurality of third through holes (107) in a front-back penetrating mode, and the third through holes (107) are used for being connected with the switch shells (1) to form a switch group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210239638.5A CN114628177A (en) | 2022-03-11 | 2022-03-11 | Isolating switch for preventing zero-breaking fault |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210239638.5A CN114628177A (en) | 2022-03-11 | 2022-03-11 | Isolating switch for preventing zero-breaking fault |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114628177A true CN114628177A (en) | 2022-06-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210239638.5A Pending CN114628177A (en) | 2022-03-11 | 2022-03-11 | Isolating switch for preventing zero-breaking fault |
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| CN (1) | CN114628177A (en) |
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Inventor after: Zou Bin Inventor after: Li Xuebin Inventor after: Wang Renwen Inventor after: Gao Xiaoyan Inventor after: Ye Xiufeng Inventor after: Chen Changjiu Inventor after: Cao Weifeng Inventor after: Yan Junqi Inventor before: Gao Xiaoyan Inventor before: Ye Xiufeng Inventor before: Chen Changjiu Inventor before: Cao Weifeng Inventor before: Yan Junqi |