A rotary disconnector

Abstract

The application discloses a rotary isolator and belongs to the technical field of isolators. The rotary isolator comprises an operating mechanism and a plurality of rotary isolating units which are linearly coupled with each other. The operating mechanism comprises an operating rod assembly, a first spring and a rotating disc assembly. The operating rod assembly comprises a first connecting shaft and a guide piece. The first connecting shaft is matched with the guide piece and is used for driving the axial movement of the guide piece by the radial movement of the first connecting shaft. The operating mechanism in the application rotates the first connecting shaft by 360 degrees with the assistance of the first spring and realizes the opening and closing of the operating mechanism by adopting radial-axial-radial movement. Compared with the existing torsional spring mode, on the one hand, the contact bounce phenomenon can be avoided, so that the service life can be prolonged; on the other hand, the stress concentration at the bending part of the torsional spring can be avoided, so that the reliability of the operating mechanism is increased. In addition, by shortening the on-off transient state of the isolator and strengthening arc extinction, the service life of the isolator is further improved.

Description

Technical Field

[0001] This invention relates to a rotary disconnect switch, belonging to the field of disconnect switch technology. Background Technology

[0002] A disconnector switch is a commonly used circuit component. Its basic working principle is to set a stationary contact that cannot be moved and a moving contact that can move relative to the stationary contact on both sides of the circuit node. By moving the moving contact, the moving and stationary contacts are made to conduct, thereby connecting the circuit node.

[0003] Currently, in practical applications, moving and stationary contacts are often made into moving and stationary contact pieces, with a motion mechanism set on the moving contact piece to drive it to move and achieve the conduction effect. However, the torsion spring type is mainly used at present, which realizes the opening / closing of the operating mechanism by rotating 90° to the left or 90° to the right. In the process of rotating the traditional contact piece to 90° to the left or right, the torsion spring will store and release energy, resulting in the contact piece bouncing. This bouncing is not conducive to arc extinguishing and affects the electrical life of the contact piece. In addition, since arcing is inevitably generated during the transient switching of circuit nodes, and the frequent operation of disconnecting switches leads to frequent arcing, the heat generated by the arcing causes the plastic material in the disconnecting switch to vaporize and adhere to the surface of the moving and stationary contacts, i.e., the carbon buildup effect of the arc, which affects the conductivity of the moving and stationary contacts and thus increases the maintenance cost of the disconnecting switch. Therefore, arc extinguishing plates are usually installed near the moving and stationary contacts to weaken the arc through the electromagnetic effect of the arc extinguishing plates, thereby reducing the impact of the arc on the disconnecting switch.

[0004] However, in practice, this implementation method has a drawback. Although the arc extinguishing plate has a weakening effect on the electric arc, the effect is limited. Furthermore, due to the carbon buildup effect of the electric arc, the surface layer of the arc extinguishing plate becomes thicker with use, which in turn causes the arc extinguishing ability of the arc extinguishing plate to continuously decrease. Summary of the Invention

[0005] The present invention addresses the technical problems mentioned in the background section by employing the following technical solution: A rotary disconnect switch includes an operating mechanism and several mutually linearly coupled rotary opening and closing disconnecting units. The operating mechanism includes an operating lever assembly, a first spring, and a turntable assembly. The operating lever assembly includes a first coupling and a guide member. The first coupling cooperates with the guide member, and the radial movement of the first coupling drives the axial movement of the guide member. The upper end of the first spring is mounted on the guide, and the lower end of the first spring is mounted on the turntable assembly; The turntable assembly includes a second coupling, which cooperates with a guide member. With the assistance of a first spring, the guide member moves back and forth axially within the second coupling, thereby driving the radial movement of the second coupling. The bottom of the second coupling is connected to a third coupling, the bottom of the third coupling is equipped with a moving contact rotating seat, and the moving contact is installed below the moving contact rotating seat; Each isolation unit includes a unit receiving tray, and the unit receiving tray is provided with a moving contact setting area. The moving contact is rotatably disposed in the moving contact setting area and is connected or separated from the stationary contact piece in the unit receiving tray, so as to realize the power supply and disconnection of the isolation unit by driving the opening and closing of the isolation unit through the operating mechanism.

[0006] Preferably, the operating mechanism further includes a mounting base, in which a first coupling and guide for manual rotation, a first spring and a turntable assembly are installed sequentially from top to bottom; The first coupling is provided with several semi-cylinders; The guide component consists of a guide block, a ring, and a cylindrical tube connected sequentially from top to bottom. The top of the guide block is provided with several slots with one side wall being inclined. When each semi-cylinder passes the inclined surface to the bottom of the slot, the radial movement of the first coupling is realized to drive the guide to make axial movement. The upper end of the first spring is sleeved on the cylindrical tube, and the top of the first spring is in contact with the bottom of the ring. The lower end of the first spring is sleeved on the second coupling, and the lower end of the first spring is in contact with the bottom of the mounting base. The cylindrical tube is sleeved inside the second coupling. When the semi-cylinder contacts and rotates with the inclined surface of the slot with one side wall being inclined, the cylindrical tube and the first spring move axially on the second coupling. The cylindrical tube is equipped with a drive assembly, and the second coupling is equipped with an auxiliary structure inside for matching the drive assembly. With the assistance of the auxiliary structure, the drive assembly drives the second coupling to move radially by the axial movement of the drive assembly.

[0007] Preferably, the number of semi-cylinders is four, and the number of slots on the guide block is also four; When one of the semi-cylinders passes sequentially through the notch in one slot, the inclined surface, and the notch in another slot, the first coupling realizes the back-and-forth axial movement of the guide component under the conditions of rotating 90°, 180°, 270°, and 360°.

[0008] Furthermore, when one of the semi-cylinders passes through the notch on one of the slots, along the inclined plane containing that slot, to the highest point of the other slot, and then passes through the highest point back to the notch where the semi-cylinder is located, the first spring returns from compression to rebound, which is counted as one cycle. The angles at which the first coupling rotates during this time are as follows: A. When the first coupling rotates 90 degrees clockwise or counterclockwise, it is one cycle, such as the closing operation; B. When the first coupling rotates 180 degrees clockwise or counterclockwise, it is one cycle, such as during a circuit breaker tripping operation; C. When the first coupling rotates 270 degrees clockwise or counterclockwise, it is one cycle, such as during a closing operation; D. When the first coupling rotates 360 degrees clockwise or counterclockwise, it is one cycle, such as during a circuit breaker tripping operation.

[0009] Preferably, the drive assembly includes a drive shaft and two arc blocks. The drive shaft is installed in a drive groove inside the cylindrical tube, and a second spring is also provided in the drive groove. The second spring is used to limit the axial movement of the drive shaft and to buffer the drive shaft. Two arc blocks are respectively provided on the lower side wall of the ring, and each arc block is provided with a first inclined surface; the second protrusion on the second coupling is provided with a second inclined surface on its side wall, and the first inclined surface and the second inclined surface match each other; The auxiliary structure includes four limiting grooves provided on the second coupling, and each limiting groove has a third inclined surface inside, with the position of the lowest point of the third inclined surface being set as the vertex. When the vertex is not in contact with the drive shaft, the two first inclined planes push the two second inclined planes, causing the second coupling to start rotating. When the semi-cylinder crosses the inclined plane and enters the notch, it is in the unlocked state. Under the action of the first spring, the ring on the top guide causes the guide to spring back. At this time, the drive shaft will spring back along the third inclined surface in the limiting groove, thereby causing the drive shaft to drive the second coupling to rotate during the upward process. When the drive shaft enters another limiting groove, the second coupling stops rotating.

[0010] Preferably, a third coupling is connected to the bottom of the second coupling, and a moving contact rotating seat is connected to the bottom of the third coupling. The third coupling cooperates with the moving contact rotating seat to enable the moving contact on the moving contact rotating seat to rotate clockwise or counterclockwise, so as to realize the closing or opening operation.

[0011] Preferably, the unit receiving disk further includes two stationary contact mounting positions, two arc extinguishing positions, and four magnet embedding positions, and the isolation unit further includes two stationary contacts, which are correspondingly arranged in the two stationary contact mounting positions; Two arc-extinguishing grid groups are respectively set at the two arc-extinguishing positions; Four permanent magnets are correspondingly embedded in the four magnet mounting positions. The two stationary contact mounting positions and the two arc-extinguishing positions are located near the moving contact setting area. The stationary contact mounting positions are located near the arc-extinguishing positions. The two stationary contact mounting positions and the two arc-extinguishing positions are arranged in a rotating array with the rotation center of the moving contact as the fixed point. The four magnet mounting positions are divided into two pairs, and each pair of magnet mounting positions is arranged near both sides of each arc-extinguishing position.

[0012] The purpose of adopting the above scheme is to conveniently achieve rapid opening and closing of the moving and stationary contacts by controlling the rotation speed of the moving contact, thereby shortening the duration of the switching transient of the disconnecting switch. On the other hand, the permanent magnet bends the electric arc generated by the moving and stationary contacts, thereby reducing the thermal effect and greatly reducing the carbon deposition effect of the electric arc. Therefore, this utility model can further improve the service life of the disconnecting switch by shortening the switching transient and strengthening arc suppression.

[0013] Preferably, the moving contact includes a contact housing and a moving contact piece disposed inside the contact housing; the moving contact housing has a height direction extending along the height direction of the unit receiving disk. The number of movable contact pieces is two, which are corresponding and symmetrically arranged along the height direction of the shell. The two ends of each movable contact piece are located at opposite sides of the movable contact shell and exposed to the outside. When the stationary contact is inserted between the two moving contacts, the moving contact is connected to the stationary contact.

[0014] Preferably, the same movable contact piece bends and extends along the height direction of the shell, and the same end of the two movable contact pieces corresponds along the height direction of the shell, so that the two movable contact pieces are arranged in an "X" shape.

[0015] Preferably, the moving contact further includes an intermediate spring piece, both ends of which have elastic segments that curve upwards in the same direction along the height of the shell. The two elastic segments of the intermediate spring are respectively located at the two conductive openings, and the elastic segments are used to elastically press the two ends of the moving contact piece in the same direction. The intermediate spring pieces are in pairs, and the elastic segments of the pair of intermediate spring pieces are arranged facing each other, so that the two elastic segments are used to elastically press the two ends of the two moving contact pieces against each other.

[0016] Preferably, the unit receiving disk has a coupling through hole located in the moving contact setting area, and an upper end face and a lower end face of the receiving disk that are opposite and parallel in the shell height direction. The upper end face and the lower end face of the receiving disk each have an external coupling portion and an external coupling mating portion, respectively. The two unit receiving disks are coupled in the shell height direction through the concave-convex fit of the external coupling portion and the external coupling mating portion. The contact shell has an upper end face and a lower end face that are opposite and parallel in the shell height direction. The upper end face and the lower end face of the shell respectively have an internal coupling part and an internal coupling mating part. The two contact shells are coupled in the shell height direction through the concave and convex fit of the internal coupling part and the internal coupling mating part, and the coupling part of the internal coupling part and the internal coupling mating part passes through the coupling through hole.

[0017] By adopting the above scheme, the synchronous operation of moving and stationary contacts on multiple circuit nodes can be conveniently achieved by coupling multiple rotary opening and closing isolation units.

[0018] Preferably, the side wall of the ring is provided with a second protrusion, and the side wall of the mounting base is provided with a limiting groove that matches the second protrusion, and the second protrusion is installed in the limiting groove.

[0019] Preferably, the operating lever assembly further includes a shaft that is inserted into the inner top of the first coupling for driving the first coupling to rotate.

[0020] Preferably, the conductive port has a defect avoidance sub-port, which is used to avoid the stationary contact piece when the moving contact rotates.

[0021] Preferably, the contact housing further includes an externally open parking cavity, which communicates with the conductive port via the clearance defect port. The parking cavity has parking ribs along the height of the shell. When the stationary contact plate rotates to contact the stop rib, the stop rib and the stationary contact plate are in an interference fit.

[0022] The purpose of adopting the above solution is that when there is no external torque drive, the stationary contact piece cannot overcome the friction with the stopping rib and move. However, when driven by external torque, the stationary contact piece can overcome the friction with the stopping rib and move. Moreover, the frequent movement causes frequent scraping between the stationary contact piece and the stopping rib, which effectively removes the floating dust on the stationary contact piece, thereby achieving self-cleaning. Therefore, this utility model can achieve self-cleaning of exposed stationary contact pieces.

[0023] Preferably, the moving contact housing includes two moving contact half-shells that mate along the height direction of the housing.

[0024] The beneficial effects of the present invention are: the operating mechanism of the present invention rotates the first coupling 360° with the assistance of the first spring, and uses radial-axial-radial motion to realize the opening and closing of the operating mechanism. Compared with the existing method of using torsion spring, on the one hand, it can avoid the contact bounce phenomenon, thereby extending the service life, and on the other hand, it can avoid the stress concentration at the bending point of the torsion spring, thereby increasing the reliability of the operating mechanism. In addition, the present invention firstly achieves rapid opening and closing of the moving and stationary contacts by controlling the rotation speed of the moving contact, thereby shortening the duration of the switching transient of the disconnecting switch; on the other hand, the permanent magnet bends the electric arc generated by the moving and stationary contacts, thereby reducing the thermal effect and greatly reducing the carbon deposition effect of the electric arc. Therefore, the present invention can further improve the service life of the disconnecting switch by shortening the switching transient and strengthening arc suppression.

[0025] Frequent movements cause frequent scraping between the stationary contact plate and the stationary rib, effectively removing floating dust from the stationary contact plate and thus achieving self-cleaning. Therefore, the present invention can achieve self-cleaning of exposed stationary contact plates.

[0026] It can conveniently achieve synchronous operation of moving and stationary contacts on multiple circuit nodes by coupling multiple rotary opening and closing isolation units. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the operating mechanism in this invention; Figure 2 This is a cross-sectional view of the operating mechanism in this invention; Figure 3 This is an exploded view of the operating mechanism in this invention; Figure 4 This is an enlarged structural diagram of the first coupling, the guide member, and the second coupling in this invention. Figure 5 This is a schematic diagram of the guide component in this invention; Figure 6 for Figure 5 Schematic diagram of the structure in the AA direction; Figure 7 This is a schematic diagram of the structure of the second coupling in this invention; Figure 8 for Figure 7 Schematic diagram of the structure in the middle BB direction; Figure 9 This is a schematic diagram of the structure when the shaft and the first coupling are connected in this invention; Figure 10 This is a schematic diagram of the structure when the third coupling is connected to the contact rotating seat in this invention; Figure 11This is a schematic diagram of a rotary disconnecting switch according to an embodiment of the present invention; Figure 12 This is a schematic diagram of a unit receiving tray according to an embodiment of the present invention; Figure 13 This is a schematic diagram of the moving contact according to an embodiment of the present invention; Figure 14 for Figure 13 Exploded view; Figure 15 for Figure 13 A sectional view.

[0028] Figure 16 This is an exploded view of the upper cover, lower cover, and operating mechanism in this invention; Figure 17 This is a schematic diagram of the upper cover, lower cover, and operating mechanism of the present invention from another perspective; Figure 18 This is a schematic diagram of the structure of the present invention; Figure 19 for Figure 18 Schematic diagram of the CC-axis structure; In the diagram: Mounting base 1; First coupling 2; Semi-cylinder 201; Square groove 202; Circular notch 203; Guide 3; Slot 301; Inclined surface 302; Notch 303; First inclined surface 304; Drive groove 305; First spring 6; Second coupling 7; Limiting groove 701; Second inclined surface 702; Third inclined surface 703; Vertex 704; Third coupling 8; Square hole 801; Square column 802; Semi-arc housing 9; Unit receiving plate 10; Moving contact setting area 11; Circular gasket 111; Square block 112; Flange 16; Elliptical fixing groove 17; Lug 18; Fixed Fixed slot 19; Moving contact 20; Rotary disconnect switch 100; Rotary opening and closing isolation unit 100A; Housing height direction D; Arc extinguishing position 13; Magnet embedding position 14; Coupling through hole 15; Moving contact housing 21; Moving contact half housing 21a; Internal coupling part 21b; Internal coupling mating part 21c; Contact piece receiving cavity 211; Conducting port 2111; Avoidance defect sub-port 2111a; Parking cavity 212; Parking rib 2121; Moving contact piece 22; Supporting rib 23; Intermediate spring piece 24; Elastic segment 24a; Stationary contact piece 30; Arc extinguishing grid plate group 40; Shaft 50; First protrusion 60. Detailed Implementation

[0029] To facilitate a clear understanding of the technical means, creative features, objectives, and effects of this invention, the invention will be further described below in conjunction with specific illustrations.

[0030] Example 1 like Figure 1-19As shown, a rotary disconnect switch 100 includes an operating mechanism and several mutually linearly coupled rotary opening and closing disconnecting units. The operating mechanism includes an operating lever assembly, a first spring 6 and a turntable assembly. The operating lever assembly includes a first coupling 2 and a guide 3. The first coupling 2 cooperates with the guide 3, and the radial movement of the first coupling 2 drives the axial movement of the guide 3. The upper end of the first spring 6 is mounted on the guide 3, and the lower end of the first spring 6 is mounted on the turntable assembly. The turntable assembly includes a second coupling 7, which cooperates with a guide member 3. With the assistance of a first spring 6, the guide member 3 moves back and forth axially within the second coupling 7, thereby driving the radial movement of the second coupling 7. The bottom of the second coupling 7 is connected to the third coupling 8, the bottom of the third coupling 8 is equipped with a moving contact rotating seat, and the moving contact 20 is installed below the moving contact rotating seat. Each isolation unit includes a unit receiving tray 10. The unit receiving tray 10 is provided with a moving contact setting area 11. The moving contact 20 is rotatably set in the moving contact setting area 11 and is either connected or separated from the stationary contact piece 30 in the unit receiving tray 10. It is used to drive the isolation unit to open and close through the operating mechanism to realize the power supply and disconnection of the isolation unit.

[0031] The operating mechanism also includes a mounting base 1, in which a first coupling 2 for manual rotation, a guide 3, a first spring 6, and a turntable assembly are installed sequentially from top to bottom. The first coupling 2 is provided with several semi-cylinders 21; Guide component 3 consists of a guide block, a ring, and a cylindrical tube connected sequentially from top to bottom; The top of the guide block is provided with several slots 301 with one side wall being inclined surface 302. When each semi-cylinder 21 passes through the inclined surface 302 to the bottom of the slot 301, the radial movement of the first coupling 2 is realized to drive the guide 3 to make axial movement. The upper end of the first spring 6 is sleeved on the cylindrical tube, and the top of the first spring 6 is in contact with the bottom of the ring. The lower end of the first spring 6 is sleeved on the second coupling 7, and the lower end of the first spring 6 is in contact with the bottom of the mounting base 1. (It should be noted here that the mounting base 1 is composed of two axially symmetrical semi-circular shells 9. The interior of the arc-shaped shell 9 containing the mounting base 1 has a step, and the lower end of the first spring 6 contacts the step, such as...) Figure 2 (as shown) The cylindrical tube is sleeved inside the second coupling 7. When the semi-cylinder 21 contacts and rotates with the inclined surface 302 where the slot 301 is located, which is an inclined surface 302 on one side, the cylindrical tube and the first spring 6 move radially on the second coupling 7. The cylindrical tube is equipped with a drive assembly, and the second coupling 7 is equipped with an auxiliary structure inside for matching the drive assembly. With the assistance of the auxiliary structure, the drive assembly drives the second coupling 7 to move axially by the radial movement of the drive assembly.

[0032] It should be noted that inclined plane 302 is an inclined curved surface.

[0033] Specifically, the semi-circular housing 9 is provided with lugs 18, and the upper cover for fixing the operating mechanism is provided with a fixing groove 19, so that the lugs 18 are installed in the fixing groove 19. Then, fasteners such as screws or rivets pass through the fixing groove 19 and lugs 18 at once, so that the two semi-circular housings 9 are finally fixed in the upper cover. Then, insert the semi-circular housing on the operating mechanism into the lower cover, and let the flanges 16 on the two semi-circular housings 9 sit in the elliptical fixing grooves 17 on the lower cover. This will fix the two semi-circular housings 9 on the lower cover. Then, fix the upper cover and the lower cover with screws or rivets and other fasteners, so that the operating mechanism can be installed in the assembly composed of the upper cover and the lower cover.

[0034] There are four semi-cylinders 21, and there are also four slots 301 on the guide block; The operating lever assembly also includes a shaft 50, which is inserted into the inner top of the first coupling 2 for driving the first coupling 2 to rotate.

[0035] It should be noted that a circular washer 111 is fitted onto the shaft 50, and a square block 112 is provided at the bottom of the shaft 11. The top of the first coupling 2 is provided with a square groove 22 that matches the square block 112, and the top of the assembly formed by the two semi-circular outer shells 9 of the mounting base 1 is provided with a circular notch 23 that matches the circular washer 111 (e.g., ...). Figure 9 (as shown) When the square block 112 of the shaft 50 is inserted into the square groove 22 of the first coupling 2, the circular shim 111 is then fitted into and fixed in the circular notch 23.

[0036] When one of the semi-cylinders 201 passes sequentially through the notch 303 in one slot 301, the inclined surface 302, and the notch 303 in another slot 301, the first coupling 6 realizes the back-and-forth axial movement of the guide member under the conditions of rotating 90°, 180°, 270° and 360°.

[0037] Furthermore, when one of the semi-cylinders 201 passes through the notch 303 on one of the slots 301, through the inclined plane 302 where the slot 301 is located, to the highest point of another slot 301 (it should be noted that one slot 301 is adjacent to another slot 301), and then passes through the highest point to the notch 303 of the slot 301 where the semi-cylinder 21 is located, the first spring 6 returns from compression to rebound, which is counted as one cycle. The angles at which the first coupling 7 rotates at this time are as follows: A. When the first coupling 2 rotates 90 degrees clockwise or counterclockwise, it is one cycle, such as the closing operation; B. When the first coupling 2 rotates 180 degrees clockwise or counterclockwise, it is one cycle, such as a circuit breaker tripping operation; C. When the first coupling 2 rotates 270 degrees clockwise or counterclockwise, it is one cycle, such as during a closing operation; D. When the first coupling 2 rotates 360 degrees clockwise or counterclockwise, it is one cycle, such as a circuit breaker tripping operation.

[0038] The drive assembly includes a drive shaft 4 and two arc blocks. The drive shaft 4 is installed in a drive groove 305 inside the cylindrical tube, and a second spring is also provided in the drive groove 305. The second spring is used to limit the axial movement of the drive shaft and to buffer the drive shaft. Two arc blocks are respectively provided on the lower side wall of the ring (it should be noted that the ring and the arc blocks are integrally formed), and each arc block is provided with a first inclined surface 304; the second protrusion on the second coupling 7 is provided with a second inclined surface 73 on its side wall, and the first inclined surface 304 and the second inclined surface 73 match each other. The auxiliary structure includes four limiting grooves 701 provided on the second coupling 7, and each limiting groove 701 has a third inclined surface 703 inside, and the position of the lowest point of the third inclined surface 703 is set as the vertex 704. When the vertex 704 is not in contact with the drive shaft 4, the two first inclined surfaces 304 push the two second inclined surfaces 702, causing the second coupling 7 to start rotating. When the semi-cylinder 21 crosses the inclined surface 302 and enters the notch 303, it is in the unlocked state. Under the action of the first spring 6, the ring on the top guide 3 causes the guide 3 to spring back. At this time, the drive shaft 4 will spring back along the third inclined surface 703 in the limiting groove 701, so that the drive shaft 4 drives the second coupling 7 to rotate during the upward process. When the drive shaft 4 enters another limiting groove 701, the second coupling 7 stops rotating.

[0039] The ring has a first protrusion 60 on its side wall and a limiting groove 701 that matches the first protrusion 60 on its side wall. The first protrusion 60 is installed in the limiting groove 701.

[0040] It should be noted that the first inclined plane 304 and the second inclined plane 702 are both straight inclined planes, while the third inclined plane 703 is a curved inclined plane.

[0041] The bottom of the second coupling 7 is connected to the third coupling 8, and the bottom of the third coupling 8 is connected to the contact rotating seat. The third coupling 8 cooperates with the contact rotating seat to enable the contact 12 on the contact rotating seat to rotate clockwise or counterclockwise to realize the closing or opening operation.

[0042] It should be noted that the bottom of the third coupling 8 is provided with a square hole 801, and the contact rotating seat is provided with a square post 13. When the square hole 801 of the third coupling 8 is fitted into the square post 802, the connection between the third coupling 8 and the contact rotating seat is realized (e.g., Figure 10 (As shown).

[0043] It should be noted that the rotation of the second coupling 7 drives the rotation of the third coupling 8, which in turn drives the rotation of the contact 12.

[0044] like Figure 11 As shown, the rotary opening and closing isolation unit 100A includes a unit receiving plate 10, a moving contact 20, a stationary contact piece 30, an arc-extinguishing grid plate group 40, and a permanent magnet.

[0045] The rotary opening and closing isolation unit 100A has an upper end face (not shown in the figure) and a lower end face (not shown in the figure) of the receiving plate that are opposite and parallel in the height direction of the housing. The upper end face and the lower end face of the receiving plate have an external coupling part (not shown in the figure) and an external coupling mating part (not shown in the figure), respectively. The two unit receiving plates 10 are coupled through the concave and convex mating of the external coupling part and the external coupling mating part. Specifically, multiple rotary opening and closing isolation units 100A are coupled in a straight line through the linear coupling of the unit receiving plates 10.

[0046] like Figure 12 As shown, the unit receiving disk 10 includes a moving contact setting area 11, two stationary contact mounting positions 12, two arc extinguishing positions 13, four magnet embedding positions 14, and a coupling through hole 15. The coupling through hole 15 is located within the moving contact setting area 11. The direction extending along the height direction of the unit receiving disk 10 is taken as the shell height direction D. Specifically, the moving contact setting area 11, the two stationary contact mounting positions 12, the two arc extinguishing positions 13, and the two magnet embedding positions 14 are all recessed structures formed by the unit receiving disk 10. In this embodiment, the unit receiving disk 10 is a rectangular disk with an upper opening and a detachable rectangular outline frame. The external coupling part is the protrusion of the outline frame, and the external coupling mating part is the recess of the outline frame. The moving contact setting area 11 is cylindrically recessed, and the coupling through hole 15 is coaxial with the moving contact setting area 11. The two unit receiving disks 10 are coupled in the shell height direction D.

[0047] The two stationary contact mounting positions 12 and the two arc-extinguishing positions 13 are located near the moving contact setting area 11. The stationary contact mounting position 12 is located near the arc-extinguishing position 13. The two stationary contact mounting positions 12 and the two arc-extinguishing positions 13 are arranged in a rotating array with the center of the moving contact setting area 11 as the fixed point. The magnet mounting positions 14 are divided into two pairs. Each pair of magnet mounting positions 14 is arranged near each arc-extinguishing position 13. In this embodiment, each pair of magnet mounting positions 14 is arranged on both sides of each arc-extinguishing position 13. One of each pair of magnet mounting positions 14 is located in the moving contact setting area and corresponds to the stationary contact mounting position 12.

[0048] The moving contact 20 is rotatably disposed in the moving contact setting area 11. Specifically, the moving contact 20 rotates about the center of the moving contact setting area 11.

[0049] like Figures 13 to 15 As shown, the moving contact 20 includes a contact shell 21, a moving contact piece 22, and an intermediate spring piece 24.

[0050] The direction in which the contact shell 21 extends along the height direction of the unit receiving disk 10 is the shell height direction D. The contact shell 21 includes two contact half-shells 21a that cooperate along the shell height direction D.

[0051] The contact housing 21 has an upper end face (not shown in the figure) and a lower end face (not shown in the figure) that are opposite and parallel to each other in the height direction D. The upper end face and the lower end face of the housing have an internal coupling part 21b and an internal coupling mating part 21c, respectively. The two contact housings 21 are coupled in the height direction D by the concave and convex mating of the internal coupling part 21b and the internal coupling mating part 21c. The coupling part of the internal coupling part 21b and the internal coupling mating part 21c passes through the coupling through hole 15 and is connected to the external rotating shaft through the internal coupling part 21b at the uppermost part of the rotary opening and closing disconnecting switch 100. This allows multiple rotary opening and closing disconnecting units 100A to rotate synchronously under the drive of the input torque of the external rotating shaft. That is, the contact housing 21 rotates under the drive of the input torque of the external rotating shaft.

[0052] The contact shell 21 has a moving contact receiving cavity 211 and a parking cavity 212 inside. In this embodiment, the contact shell 21 is a hollow disc shape.

[0053] The movable contact receiving cavity 211 has two externally open through-holes 2111, which are formed on opposite sides of the contact shell 21. Specifically, the movable contact receiving cavity 211 is formed by two contact half-shells 21a. In this embodiment, both through-holes 2111 extend along the same diameter of the contact shell 21, and the remaining part of the movable contact receiving cavity 211 except for the through-holes 2111 is olive-shaped, and the extending direction of the olive is the extending direction of the through-holes 2111. The center of the olive shape is the rotation center of the contact shell 21.

[0054] The through-hole 2111 has a clearance notch 2111a. Specifically, the clearance notch 2111a is formed by two contact half shells 21a. In this embodiment, the clearance notch 2111a is formed on the side wall of the through-hole 2111, and the clearance notch 2111a is a rectangular notch with one side open.

[0055] The stopping cavity 212 is open to the outside and communicates with the conduction port 2111 by avoiding the defective sub-port 2111a. The stopping cavity 212 has a stopping rib 2121 along the shell height direction D. In this embodiment, the stopping cavity 212 is formed at the edge of the contact shell 21, that is, it is formed by the inner wall of the moving contact receiving cavity 211. The stopping rib 2121 is a convex rib that extends radially along the contact shell 21 and has an arched arc cross section.

[0056] There are two movable contact pieces 22, which are disposed in the movable contact piece receiving cavity 211. The two movable contact pieces 22 are corresponding and symmetrically arranged along the shell height direction D. The two ends of each movable contact piece 22 are located at two conductive openings 2111, that is, the two ends of each movable contact piece 22 are located at the opposite two side edges of the contact shell 21 and exposed to the outside.

[0057] The same movable contact piece 22 bends and extends along the shell height direction D, and the same end of the two movable contact pieces 22 corresponds along the shell height direction D, so that the two movable contact pieces 22 are arranged in an "X" shape. Specifically, the middle part of the movable contact piece 22 is bent, so that the two movable contact pieces 22 avoid each other.

[0058] There is a pair of intermediate spring pieces 24, which are arranged symmetrically and correspondingly inside the movable contact plate receiving cavity 211 along the shell height direction D. Each intermediate spring piece 24 has elastic segments 24a that are raised in the same direction along the shell height direction D at both ends. The elastic segments 24a of the pair of intermediate spring pieces 24 are arranged facing each other. Specifically, the two ends of each central spring piece 24 are respectively pressed against the two ends of the movable contact plate 22.

[0059] Each intermediate spring piece 24 has two elastic segments 24a located at the two conductive openings 2111 respectively. The elastic segments 24a are used to elastically press the two ends of each moving contact piece 22 in the same direction, so that the two elastic segments 24a are used to elastically press the two ends of the two moving contact pieces 22 against each other. Specifically, as shown in the figure... Figure 6 As shown, the movable contact piece 22 is supported as a whole by the lifting rib 23, and the free end is elastically pressed by the intermediate spring piece 24.

[0060] Two stationary contact pieces 30 are respectively arranged in two stationary contact piece mounting positions 12. Specifically, the two stationary contact pieces 30 are rotated and distributed around the rotation center of the moving contact 20, and the free ends of the stationary contact pieces 30 extend into the moving contact setting area 11. When the contact shell 21 drives the moving contact piece 22 to rotate until the stationary contact piece 30 is inserted between the moving contact pieces 22, the moving contact piece 22 and the stationary contact piece 30 are connected.

[0061] Two arc-extinguishing grid plate groups 40 are respectively set in two arc-extinguishing positions 13. Specifically, the arc-extinguishing grid plate group 40 is composed of several parallel arc-extinguishing grid plates.

[0062] Four permanent magnets are embedded in the four magnet mounting positions 14. Specifically, when an electric arc is generated between the stationary contact 30 and the moving contact 22, the four permanent magnets introduce the electric arc into the arc extinguishing position 13 through the avoidance defect sub-port 2111a via the magnetic field.

[0063] The following describes the operation of the rotary disconnector switch 100 with reference to an embodiment: During the closing process: When the contact housing 21 rotates, the moving contact piece 22 rotates while the stationary contact piece 30 remains stationary. When the rotation reaches the predetermined closing angle, the stationary contact piece 30 is inserted between the two moving contact pieces 22, and the moving contact piece 22 and the stationary contact piece 30 are connected.

[0064] Opening process: When the circuit breaker is closed, the rotation continues to be reversed to open the circuit breaker by a predetermined angle. When the stationary contact 30 rotates to contact the stop bar 2121, the stop bar 2121 and the stationary contact 30 are in interference fit.

[0065] Additionally: When the circuit breaker is closed again, the stationary contact 30 overcomes the interference fit with the stop bar 2121 and performs the closing action. Furthermore, the friction between the stationary contact 30 and the stop bar 2121 causes the surface dust on the stationary contact 30 to be scraped and removed.

[0066] During the above process, in the relative rotation of the stationary contact 30 and the moving contact 20, the avoidance defect 2111a is used to avoid the stationary contact 30, thereby avoiding mechanical interference between the stationary contact 30 and the moving contact 20.

[0067] In the above-described opening / closing process, when one of the semi-cylinders 21 in the operating mechanism passes through the notch 303 on one slot 301 to the highest point of the other slot 301 (it should be noted that one slot is adjacent to the other slot), the first spring 6 is in a compressed state. When the semi-cylinder 21 moves from the highest point of the other slot 301 through the inclined plane 302 to the notch 303 of the other slot 301 (it should be noted that the two other slots 301 are the same slot 301), the first spring 6 is in a rebound state. Therefore, the time when the first spring 6 goes from compression to rebound is counted as one cycle. The angles at which the first coupling 2 rotates during this time are as follows: A. When the first coupling 2 rotates 90 degrees clockwise or counterclockwise, it is one cycle, such as the closing operation; B. When the first coupling 2 rotates 180 degrees clockwise or counterclockwise, it is one cycle, such as a circuit breaker tripping operation; C. When the first coupling 2 rotates 270 degrees clockwise or counterclockwise, it is one cycle, such as during a closing operation; D. When the first coupling 2 rotates 360 degrees clockwise or counterclockwise, it is one cycle, such as a circuit breaker tripping operation.

[0068] Example 2 This embodiment is basically the same as embodiment 1, except that the inclined plane 302 is an inclined straight plane.

[0069] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of the invention, all of which fall within the scope of the claims. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A rotary disconnect switch, characterized in that: The device includes an operating mechanism and several mutually linearly coupled rotary opening and closing isolation units. The operating mechanism includes an operating lever assembly, a first spring, and a turntable assembly. The operating lever assembly includes a first coupling and a guide member. The first coupling cooperates with the guide member, and the radial movement of the first coupling drives the axial movement of the guide member. The upper end of the first spring is mounted on the guide, and the lower end of the first spring is mounted on the turntable assembly; The turntable assembly includes a second coupling, which cooperates with a guide member. With the assistance of a first spring, the guide member moves back and forth axially within the second coupling, thereby driving the radial movement of the second coupling. The bottom of the second coupling is connected to a third coupling, the bottom of the third coupling is equipped with a moving contact rotating seat, and the moving contact is installed below the moving contact rotating seat; Each isolation unit includes a unit receiving tray, and the unit receiving tray has a moving contact setting area. The moving contact is rotatably disposed in the moving contact setting area and is connected or separated from the stationary contact piece in the unit receiving tray. It is used to drive the isolation unit to open and close through the operating mechanism to realize the power supply and disconnection of the isolation unit; wherein: the operating mechanism also includes a mounting base, and the mounting base is installed from top to bottom as a first coupling and guide for manual rotation, a first spring and a turntable assembly; The first coupling is provided with several semi-cylinders; The guide component consists of a guide block, a ring, and a cylindrical tube connected sequentially from top to bottom. The top of the guide block is provided with several slots with one side wall being inclined. When each semi-cylinder passes the inclined surface to the bottom of the slot, the radial movement of the first coupling is realized to drive the guide to make axial movement. The upper end of the first spring is sleeved on the cylindrical tube, and the top of the first spring is in contact with the bottom of the ring; The lower end of the first spring is sleeved on the second coupling, and the lower end of the first spring is in contact with the bottom of the mounting base. The cylindrical tube is sleeved inside the second coupling. When the semi-cylinder contacts and rotates with the inclined surface of the slot with one side wall being inclined, the cylindrical tube and the first spring move axially on the second coupling. The cylindrical tube is equipped with a drive assembly, and the second coupling is equipped with an auxiliary structure inside for matching the drive assembly. With the assistance of the auxiliary structure, the drive assembly drives the second coupling to move radially by the axial movement of the drive assembly.

2. A rotary disconnector according to claim 1, characterized in that: There are four semi-cylinders, and there are also four slots on the guide block; When one of the semi-cylinders passes sequentially through the notch in one slot, the inclined surface, and the notch in another slot, the first coupling realizes the back-and-forth axial movement of the guide component under the conditions of rotating 90°, 180°, 270°, and 360°.

3. A rotary disconnector according to claim 2, characterized in that: The drive assembly includes a drive shaft and two arc blocks. The drive shaft is installed in a drive groove inside a cylindrical tube, and a second spring is also provided in the drive groove. The second spring is used to limit the axial movement of the drive shaft and to buffer the drive shaft. Two arc blocks are respectively provided on the lower side wall of the ring, and each arc block is provided with a first inclined surface; the second protrusion on the second coupling is provided with a second inclined surface on its side wall, and the first inclined surface and the second inclined surface match each other; The auxiliary structure includes four limiting grooves provided on the second coupling, and each limiting groove has a third inclined surface inside, with the position of the lowest point of the third inclined surface being set as the vertex. When the vertex is not in contact with the drive shaft, the two first inclined planes push the two second inclined planes, causing the second coupling to start rotating. When the semi-cylinder crosses the inclined plane and enters the notch, it is in the unlocked state. Under the action of the first spring, the ring on the top guide causes the guide to spring back. At this time, the drive shaft will spring back along the third inclined surface in the limiting groove, thereby causing the drive shaft to drive the second coupling to rotate during the upward process. When the drive shaft enters another limiting groove, the second coupling stops rotating.

4. A rotary disconnector according to claim 3, characterized in that: The bottom of the second coupling is connected to a third coupling, and the bottom of the third coupling is connected to a moving contact rotating seat. The third coupling cooperates with the moving contact rotating seat to enable the moving contact on the moving contact rotating seat to rotate clockwise or counterclockwise, so as to realize the closing or opening operation.

5. A rotary disconnector according to claim 4, characterized in that: The unit receiving plate also includes two stationary contact mounting positions, two arc extinguishing positions, and four magnet embedding positions. The isolation unit also includes two stationary contacts, which are correspondingly arranged in the two stationary contact mounting positions. Two arc-extinguishing grid groups are respectively set at the two arc-extinguishing positions; Four permanent magnets are correspondingly embedded in the four magnet mounting positions. The two stationary contact mounting positions and the two arc-extinguishing positions are located near the moving contact setting area. The stationary contact mounting positions are located near the arc-extinguishing positions. The two stationary contact mounting positions and the two arc-extinguishing positions are arranged in a rotating array with the rotation center of the moving contact as the fixed point. The four magnet mounting positions are divided into two pairs, and each pair of magnet mounting positions is arranged near both sides of each arc-extinguishing position.

6. A rotary disconnector according to claim 5, characterized in that: in, The moving contact includes a contact housing and a moving contact piece disposed inside the contact housing; the moving contact housing has a height direction extending along the height direction of the unit receiving disk. The number of movable contact pieces is two, which are corresponding and symmetrically arranged along the height direction of the shell. The two ends of each movable contact piece are located at opposite sides of the movable contact shell and exposed to the outside. When the stationary contact is inserted between the two moving contacts, the moving contact is connected to the stationary contact.

7. A rotary disconnector according to claim 6, characterized in that: in, The same movable contact piece bends and extends along the height direction of the shell, and the same end of the two movable contact pieces corresponds along the height direction of the shell, so that the two movable contact pieces are arranged in an "X" shape.

8. A rotary disconnector according to claim 7, characterized in that: The moving contact also includes an intermediate spring piece, both ends of which have elastic segments that curve in the same direction along the height of the shell. The two elastic segments of the intermediate spring are respectively located at the two conductive ports, and the elastic segments are used to elastically press the two ends of the moving contact piece in the same direction. The intermediate spring pieces are in pairs, and the elastic segments of the pair of intermediate spring pieces are arranged facing each other, so that the two elastic segments are used to elastically press the two ends of the two moving contact pieces against each other.

9. A rotary disconnector according to any one of claims 6-8, characterized in that: in, The unit receiving plate has a coupling through hole located in the moving contact setting area, and an upper end face and a lower end face of the receiving plate that are opposite and parallel in the shell height direction. The upper end face and the lower end face of the receiving plate have an external coupling part and an external coupling mating part, respectively. The two unit receiving plates are coupled in the shell height direction through the concave and convex fit of the external coupling part and the external coupling mating part. The contact shell has an upper end face and a lower end face that are opposite and parallel in the shell height direction. The upper end face and the lower end face of the shell respectively have an internal coupling part and an internal coupling mating part. The two contact shells are coupled in the shell height direction through the concave and convex fit of the internal coupling part and the internal coupling mating part, and the coupling part of the internal coupling part and the internal coupling mating part passes through the coupling through hole.

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