Rotary disconnector

Abstract

The present invention relates to the technical field of disconnectors, and disclosed is a rotary disconnector. The rotary disconnector comprises an operating mechanism and several isolation units which are linearly coupled to each other and rotate to open or close. The operation mechanism comprises an operation rod assembly, a first spring, and a turntable assembly. The operation rod assembly comprises a first coupling and a guide member. The first coupling cooperates with the guide member, so that radial movement of the first coupling drives axial movement of the guide member. In the operating mechanism of the present invention, under the assistance of the first spring, the first coupling is rotated by 360°, and opening and closing of the operating mechanism are achieved by using radial-axial-radial movement. Compared with the existing method of using torsion springs, in one aspect, it is possible to avoid the phenomenon of contact bounce, so that service life may be prolonged; and in another aspect, stress concentration at a bending point of the torsion spring due to the torsion spring is avoided, thereby increasing the reliability of the operating mechanism. In addition, by means of shortening the on-off transient state of the disconnector and strengthening arc suppression, the service life of the disconnector is further improved.

Description

A rotary isolating switch Technical Field

[0001] The invention relates to a rotary isolating switch, belonging to the technical field of isolating switches. Background Art

[0002] An isolating switch is a commonly used component in circuits. Its basic working principle is to set a stationary contact that cannot move on both sides of a circuit node and a moving contact that can move relative to the stationary contact. The movement of the moving contact causes the moving and stationary contacts to conduct, thereby connecting the circuit node.

[0003] At present, in practical applications, the moving and static contacts are often made in the form of moving and static contact pieces, and a motion mechanism is set on the moving contact piece so that the moving contact piece is driven to move, thereby achieving the conduction effect. However, the torsion spring type is currently mainly used, and the operating mechanism is opened / closed by rotating 90° to the left or 90° to the right. In the process of rotating the traditional contact to the left or right to 90°, the torsion spring will store and release energy, so that the contact will bounce, which will be unfavorable for arc extinguishing due to the bouncing, and affect the electrical life of the contact. In addition, arcing is inevitable when circuit nodes are in transient on-off states, and the frequently operated disconnectors cause frequent arcing. The heat generated by the arcing causes the plastic material in the disconnector to vaporize and adhere to the surfaces of the moving and static contacts, which is the carbon deposition effect of the arc, thereby affecting the conduction capacity of the moving and static contacts, and further increasing the maintenance cost of the disconnector. Therefore, arc extinguishing plates are usually installed near the moving and static contacts to weaken the arc through the electromagnetic effect of the arc extinguishing plates, thereby reducing the impact of the arc on the disconnector.

[0004] However, in practice, this implementation method has a defect. Although the arc extinguishing plate has a weakening effect on the arc, the effect is limited. In addition, due to the carbon deposition effect of the arc, the adhesion layer on the surface of the arc extinguishing plate becomes thicker with use, thereby causing the arc extinguishing ability of the arc extinguishing plate to continue to decline.

[0005] Summary of the Invention

[0006] The present invention aims to solve the technical problems mentioned in the above background technology by adopting the following technical solutions:

[0007] A rotary disconnector comprises an operating mechanism and a plurality of linearly coupled rotary opening and closing disconnecting units. The operating mechanism comprises an operating lever assembly, a first spring, and a rotary disk assembly. The operating lever assembly comprises a first coupling and a guide member. The first coupling cooperates with the guide member so that radial movement of the first coupling drives axial movement of the guide member.

[0008] The upper end of the first spring is mounted on the guide member, and the lower end of the first spring is mounted on the turntable assembly;

[0009] The turntable assembly includes a second coupling, the second coupling cooperates with the guide member, and is used for driving the radial movement of the second coupling by the guide member moving back and forth axially in the second coupling with the assistance of the first spring;

[0010] The bottom of the second coupling is connected to the third coupling, the bottom of the third coupling is installed with a moving contact rotating seat, and the moving contact is installed below the moving contact rotating seat;

[0011] Each of the isolation units includes a unit accommodating disk, and a moving contact setting area is provided in the unit accommodating box. The moving contact can be rotatably set in the moving contact setting area and is connected to or separated from the static contact piece in the unit accommodating disk, and is used to drive the isolation unit to open and close through the operating mechanism to realize the power on and off of the isolation unit.

[0012] Preferably, the operating mechanism further comprises a mounting base, in which a first coupling and a guide member for manual rotation, a first spring and a turntable assembly are sequentially mounted from top to bottom;

[0013] The first coupling is provided with a plurality of semi-cylinders;

[0014] The guide member is a guide block, a ring and a cylindrical barrel connected in sequence from top to bottom;

[0015] The top of the guide block is provided with a plurality of notches with a side wall being an inclined surface, and when each of the semi-cylinders passes through the inclined surface to the bottom of the notch, the radial movement of the first coupling is realized to drive the guide member to move axially;

[0016] 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;

[0017] 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 inner bottom of the mounting base;

[0018] The cylindrical tube is sleeved inside the second coupling. When the semi-cylinder contacts the inclined surface of the notch on one side wall and rotates, the cylindrical tube and the first spring move axially on the second coupling.

[0019] The cylindrical tube is provided with a driving assembly, and the interior of the second coupling is provided with an auxiliary structure for matching the driving assembly, which is used to drive the second coupling to move radially by the axial movement of the driving assembly with the assistance of the auxiliary structure.

[0020] Preferably, the number of the semi-cylinders is four, and the number of the notches on the guide block is also four;

[0021] When one of the semi-cylinders passes through the notch in one of the slots, the inclined surface, and the notch in the other slot in sequence, the first coupling realizes the back-and-forth axial movement of the guide member under the conditions of rotating 90°, 180°, 270° and 360°.

[0022] Furthermore, when one of the semi-cylinders passes through the notch on one of the slots, through the inclined surface where the slot is located, to the highest point of the other slot, and then through the highest point to the notch where the semi-cylinder is located, the first spring is compressed and rebounded, which is counted as one cycle, and the angles rotated by the first coupling at this time are as follows:

[0023] A. When the first coupling rotates 90 degrees clockwise or counterclockwise, it is a cycle, such as a closing operation;

[0024] B. When the first coupling rotates 180 degrees clockwise or counterclockwise, it is one cycle, such as the opening operation;

[0025] C. When the first coupling rotates 270 degrees clockwise or counterclockwise, it is one cycle, such as a closing operation;

[0026] D. When the first coupling rotates 360 degrees clockwise or counterclockwise, it is one cycle, such as a tripping operation.

[0027] Preferably, the drive assembly includes a drive shaft and two arc blocks, the drive shaft is installed in a drive groove in the cylindrical barrel, and a second spring is further provided in the drive groove, the second spring is used to limit the axial movement of the drive shaft and act as a buffer for the drive shaft;

[0028] Two arc blocks are respectively provided on the lower side wall of the circular ring, and each of the arc blocks is provided with a first inclined surface; the side walls of the second protrusion on the second coupling are respectively provided with a second inclined surface, and the first inclined surface and the second inclined surface match;

[0029] The auxiliary structure includes four limiting grooves provided on the second coupling, and a third inclined surface is provided inside each limiting groove, and the position at the lowest point of the third inclined surface is set as the vertex;

[0030] When the vertex is not in contact with the drive shaft, the two first inclined surfaces push the two second inclined surfaces, causing the second coupling to start rotating. When the semi-cylinder passes over the inclined surfaces and enters the gap, it is in the unlocked state.

[0031] Under the action of the first spring, the ring on the top guide member causes the guide member to rebound. At this time, the drive shaft will rebound along the third inclined surface in the limit groove, so that the drive shaft drives the second coupling to rotate during the rising process. When the drive shaft enters another limit groove, the second coupling stops rotating.

[0032] Preferably, 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 to achieve closing or opening operations.

[0033] Preferably, the unit accommodating disk further includes two static contact piece installation positions, two arc extinguishing positions and four magnet embedding positions, and the isolation unit further includes two static contact pieces, which are correspondingly arranged at the two static contact piece installation positions;

[0034] Two arc extinguishing grid groups are correspondingly arranged at the two arc extinguishing positions;

[0035] Four permanent magnets are embedded in the four magnet embedding positions.

[0036] Among them, the two static contact installation positions and the two arc extinguishing positions are both located near the moving contact setting area, the static contact installation position is located near the arc extinguishing position, and the two static contact installation positions and the two arc extinguishing positions are distributed in a rotating array with the rotation center of the moving contact as the fixed point, and the four magnet embedding positions are divided into two pairs, and each pair of the magnet embedding positions is correspondingly arranged near both sides of each of the arc extinguishing positions.

[0037] The purpose of adopting the above scheme is to conveniently achieve rapid opening and closing of the moving and static contacts by controlling the rotational speed of the moving contact, that is, to shorten the on-off transient duration of the disconnector; on the other hand, the permanent magnet bends the arc generated by the moving and static contacts, thereby reducing the thermal effect and greatly reducing the carbon deposition effect of the arc. Therefore, the utility model can further increase the service life of the disconnector by shortening the on-off transient of the disconnector and strengthening arc extinguishing.

[0038] Preferably, the movable contact comprises a contact shell and a movable contact piece arranged inside the contact shell; the movable contact shell has a shell height direction extending along the height direction of the unit accommodating plate,

[0039] There are two movable contact pieces, which are arranged correspondingly and symmetrically along the height direction of the housing. The two ends of each movable contact piece are respectively located on the opposite side edges of the movable contact housing and exposed to the outside.

[0040] When the stationary contact piece is inserted between the two moving contact pieces, the moving contact piece is electrically connected to the stationary contact piece.

[0041] Preferably, the same movable contact piece is bent and extended along the height direction of the shell, and the same end portions of the two movable contact pieces correspond to each other along the height direction of the shell, so that the two movable contact pieces are cross-arranged in an "X" shape.

[0042] Preferably, the movable contact further comprises an intermediate spring piece, both ends of which have elastic segments that are tilted in the same direction along the shell height direction.

[0043] The two elastic segments of the intermediate spring piece are respectively located at the two conducting openings, and the elastic segments are used to elastically press the two ends of the movable contact piece in the same direction;

[0044] There is a pair of intermediate spring sheets, and the elastic segments of the pair of intermediate spring sheets are arranged facing each other, so that the two elastic segments are used to elastically press the two ends of the two moving contact sheets toward each other.

[0045] Preferably, the unit accommodating disk has a coupling through hole located in the movable contact setting area, and an upper end surface of the accommodating disk and a lower end surface of the accommodating disk that are opposite and parallel in the shell height direction, the upper end surface of the accommodating disk and the lower end surface of the accommodating disk respectively have an external coupling portion and an external coupling matching portion, and the two unit accommodating disks are coupled in the shell height direction through the concave-convex matching of the external coupling portion and the external coupling matching portion.

[0046] The contact shell has an upper end surface and a lower end surface of the shell that are opposite and parallel in the shell height direction, and the upper end surface of the shell and the lower end surface of the shell respectively have an internal coupling portion and an internal coupling matching portion, and the two contact shells are coupled in the shell height direction through the concave-convex matching of the internal coupling portion and the internal coupling matching portion, and the coupling parts of the internal coupling portion and the internal coupling matching portion pass through the coupling through-hole.

[0047] By adopting the above solution, the synchronous action of the moving and static contacts on multiple circuit nodes can be conveniently achieved by coupling multiple rotating opening and closing isolation units.

[0048] Preferably, a second protrusion is provided on the side wall of the circular ring, a limiting groove matching the second protrusion is provided on the side wall of the mounting base, and the second protrusion is installed in the limiting groove.

[0049] Preferably, the operating rod assembly further includes a shaft, which is plugged into the inner top of the first coupling and is used to drive the first coupling to rotate.

[0050] Preferably, the conducting opening has an avoidance defect sub-opening, and when the moving contact rotates, the avoidance defect sub-opening is used to avoid the static contact piece.

[0051] Preferably, the contact housing further comprises a parking cavity open to the outside, the parking cavity being connected to the conducting opening through the avoidance defect sub-opening.

[0052] The parking cavity is provided with parking ribs along the shell height direction.

[0053] When the stationary contact piece rotates until it contacts the parking rib, the parking rib and the stationary contact piece are interference fit.

[0054] The purpose of adopting the above scheme is that when there is no external torque drive, the static contact piece cannot overcome the friction with the parking rib and move, but when driven by external torque, the static contact piece can overcome the friction with the parking rib and move. Moreover, frequent movements cause frequent scraping between the static contact piece and the parking rib, effectively scraping off the floating dust on the static contact piece, thereby achieving self-cleaning. Therefore, the utility model can achieve self-cleaning of the exposed static contact piece.

[0055] Preferably, the moving contact housing comprises two moving contact half-shells matched along the housing height direction.

[0056] The beneficial effects of the present invention are as follows: the operating mechanism of the present invention, with the assistance of the first spring, rotates the first coupling 360 degrees and uses radial-axial-radial motion to realize the opening and closing of the operating mechanism. Compared with the existing method using torsion springs, on the one hand, it can avoid the contact bounce phenomenon, thereby extending the service life; on the other hand, it avoids the stress concentration at the bending point of the torsion spring due to the torsion spring, thereby increasing the reliability of the operating mechanism;

[0057] In addition, the present invention first conveniently realizes the rapid opening and closing of the moving and static contacts by controlling the rotational speed of the moving contact, that is, shortening the duration of the on-off transient of the disconnector; on the other hand, the permanent magnet bends the arc generated by the moving and static contacts, thereby reducing the thermal effect and greatly reducing the carbon deposition effect of the arc. Therefore, the present invention can further improve the service life of the disconnector by shortening the on-off transient of the disconnector and strengthening arc extinguishing.

[0058] Frequent movement causes frequent scraping between the static contact piece and the parking rib, effectively scraping away dust on the static contact piece, thereby achieving self-cleaning. Therefore, the present invention can achieve self-cleaning of exposed static contacts. By coupling multiple rotating opening and closing isolation units, it can conveniently achieve synchronous operation of the moving and static contacts at multiple circuit nodes. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] FIG1 is a schematic structural diagram of an operating mechanism in the present invention;

[0060] FIG2 is a cross-sectional view of the operating mechanism of the present invention;

[0061] FIG3 is an exploded view of the operating mechanism of the present invention;

[0062] FIG4 is an enlarged structural diagram of the first coupling, the guide member and the second coupling in the present invention;

[0063] FIG5 is a schematic structural diagram of a guide member in the present invention;

[0064] FIG6 is a schematic diagram of the structure of FIG5 along the AA direction;

[0065] FIG7 is a schematic structural diagram of the second coupling of the present invention;

[0066] FIG8 is a schematic structural diagram of the BB direction in FIG7;

[0067] FIG9 is a schematic structural diagram of the connection between the middle shaft and the first coupling of the present invention;

[0068] 10 is a schematic structural diagram of the connection between the third coupling and the contact rotating seat in the present invention;

[0069] FIG11 is a schematic diagram of a rotary opening and closing disconnector according to an embodiment of the present invention;

[0070] FIG12 is a schematic diagram of a unit accommodating tray according to an embodiment of the present invention;

[0071] FIG13 is a schematic diagram of a moving contact according to an embodiment of the present invention;

[0072] FIG14 is an exploded view of FIG13 ;

[0073] FIG15 is a cross-sectional view of FIG13 .

[0074] FIG16 is an exploded schematic diagram of the upper cover, lower cover and operating mechanism of the present invention;

[0075] FIG17 is a schematic structural diagram of the upper cover, lower cover and operating mechanism of the present invention from another perspective;

[0076] FIG18 is a schematic structural diagram of the present invention;

[0077] FIG19 is a schematic diagram of the structure of the CC direction in FIG18;

[0078] In the figure: mounting base 1; first coupling 2; semi-cylinder 201; square groove 202; circular notch 203; guide member 3; notch 301; inclined surface 302; notch 303; first inclined surface 304; driving 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 accommodating disk 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 disconnector 100; rotary opening and closing isolation unit 100A; shell height direction D; arc extinguishing position 13; magnet embedding position 14; coupling through hole 15; moving contact shell 21; moving contact half shell 21a; internal coupling portion 21b; internal coupling mating portion 21c; contact piece accommodating cavity 211; conducting opening 2111; avoidance defect sub-opening 2111a; parking cavity 212; parking rib 2121; moving contact piece 22; supporting rib 23; intermediate spring piece 24; elastic segment 24a; static contact piece 30; arc extinguishing grid piece group 40; shaft 50; first protrusion 60. DETAILED DESCRIPTION

[0079] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further explained below with reference to specific illustrations.

[0080] Example 1

[0081] As shown in FIG1-19 , a rotary disconnector 100 includes an operating mechanism and a plurality of linearly coupled rotary opening and closing disconnecting units. The operating mechanism includes an operating lever assembly, a first spring 6, and a rotary disk assembly. The operating lever assembly includes a first coupling 2 and a guide member 3. The first coupling 2 cooperates with the guide member 3 so that radial movement of the first coupling 2 drives axial movement of the guide member 3.

[0082] The upper end of the first spring 6 is mounted on the guide member 3, and the lower end of the first spring 6 is mounted on the turntable assembly;

[0083] The turntable assembly includes a second coupling 7, which cooperates with the guide member 3 and is used to drive the radial movement of the second coupling 7 by the guide member 3 moving back and forth axially in the second coupling 7 with the assistance of the first spring 6;

[0084] The bottom of the second coupling 7 is connected to the third coupling 8, the bottom of the third coupling 8 is installed with a moving contact rotating seat, and the moving contact 20 is installed below the moving contact rotating seat;

[0085] Each isolation unit includes a unit accommodating disk 10, in which a moving contact setting area 11 is provided. The moving contact 20 can be rotatably set in the moving contact setting area 11 and is connected to or separated from the static contact piece 30 in the unit accommodating disk 10, and is used to drive the isolation unit to open and close through the operating mechanism to realize the power on and off of the isolation unit.

[0086] The operating mechanism also includes a mounting base 1, in which a first coupling 2 and a guide member 3 for manual rotation, a first spring 6 and a turntable assembly are sequentially mounted from top to bottom;

[0087] The first coupling 2 is provided with a plurality of semi-cylinders 21;

[0088] The guide member 3 is a guide block, a ring and a cylinder connected in sequence from top to bottom;

[0089] The top of the guide block is provided with a plurality of notches 301 with a side wall being an inclined surface 302. When each semi-cylinder 21 passes through the inclined surface 302 and reaches the bottom of the notch 301, the radial movement of the first coupling 2 is realized to drive the guide member 3 to perform axial movement.

[0090] 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;

[0091] 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 inner bottom of the mounting base 1;

[0092] (It should be noted here that the mounting base 1 is formed by installing two axially symmetrical semi-arc-shaped shells 9. The interior of the arc-shaped shell 9 where the mounting base 1 is located is provided with a step, and the lower end of the first spring 6 contacts the step, as shown in FIG2 );

[0093] The cylindrical tube is sleeved inside the second coupling 7. When the semi-cylinder 21 contacts the inclined surface 302 where the notch 301 with a side wall having an inclined surface 302 is located and rotates, the cylindrical tube and the first spring 6 move radially on the second coupling 7.

[0094] A driving assembly is provided on the cylindrical tube, and an auxiliary structure for matching the driving assembly is provided inside the second coupling 7, which is used to drive the second coupling 7 to move axially by the radial movement of the driving assembly with the assistance of the auxiliary structure.

[0095] It should be noted that the inclined surface 302 is an inclined curved surface.

[0096] Specifically, a lug 18 is provided on the semi-arc-shaped shell 9, and a fixing groove 19 is provided on the upper cover for fixing the operating mechanism, so that the lug 18 is installed in the fixing groove 19, and then a fixing member such as a screw or rivet is passed through the fixing groove 19 and the lug 18 at one time, and finally the two semi-arc-shaped shells 9 are fixed in the upper cover;

[0097] Then, the semi-arc-shaped shell on the operating mechanism is inserted into the lower cover, and the flanges 16 on the two semi-arc-shaped shells 9 are seated in the elliptical fixing grooves 17 located on the lower cover. The two semi-arc-shaped shells 9 can be fixed to the lower cover. The upper cover and the lower cover are then fixed with fixing members such as screws or rivets, thereby realizing the installation of the operating mechanism in the combination of the upper cover and the lower cover.

[0098] There are four semi-cylinders 21 and four notches 301 on the guide block.

[0099] The operating rod assembly further includes a shaft 50 , which is plugged into the inner top of the first coupling 2 and is used to drive the first coupling 2 to rotate.

[0100] It should be noted that a circular gasket 111 is sleeved on the shaft 50, and a square block 112 is provided at the bottom of the shaft 11. A square groove 22 matching the square block 112 is provided at the top of the first coupling 2, and a circular notch 23 matching the circular gasket 111 is provided at the top of the assembly formed by assembling the two semi-arc-shaped shells 9 of the mounting base 1 (as shown in FIG9 );

[0101] When the square block 112 of the shaft 50 is inserted into the square groove 22 of the first coupling 2 , the circular gasket 111 is inserted into and fixed in the circular notch 23 .

[0102] When one of the semi-cylinders 201 passes through the notch 303 in one of the slots 301, the inclined surface 302, and the notch 303 in the other slot 301 in sequence, 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°.

[0103] Furthermore, when one of the semi-cylinders 201 passes through the notch 303 on one of the slots 301, passes through the inclined surface 302 where the slot 301 is located, and reaches the highest point of the other slot 301 (it should be noted that one slot 301 is adjacent to the other 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 is compressed and rebounded, which is counted as one cycle, and the angles rotated by the first coupling 7 at this time are as follows:

[0104] A. When the first coupling 2 rotates 90 degrees clockwise or counterclockwise, it is a cycle, such as a closing operation;

[0105] B. When the first coupling 2 rotates 180 degrees clockwise or counterclockwise, it is one cycle, such as a tripping operation;

[0106] C. When the first coupling 2 rotates 270 degrees clockwise or counterclockwise, it is one cycle, such as a closing operation;

[0107] D. When the first coupling 2 rotates 360 degrees clockwise or counterclockwise, it is one cycle, such as a tripping operation.

[0108] The drive assembly includes a drive shaft 4 and two arc blocks. The drive shaft 4 is installed in a drive groove 305 in the cylindrical barrel. 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 act as a buffer for the drive shaft.

[0109] Two arc blocks are respectively provided on the lower side wall of the circular ring (it should be noted that the circular ring and the arc block are integrally formed), and each arc block is provided with a first inclined surface 304; the side walls of the second protrusion on the second coupling 7 are respectively provided with a second inclined surface 73, and the first inclined surface 304 and the second inclined surface 73 match;

[0110] The auxiliary structure includes four limiting grooves 701 provided on the second coupling 7, and a third inclined surface 703 is provided inside each limiting groove 701, and the position at the lowest point of the third inclined surface 703 is set as the vertex 704;

[0111] 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 passes over the inclined surfaces 302 and enters the notch 303, it is in the unlocked state.

[0112] Under the action of the first spring 6, the ring on the top guide member 3 causes the guide member 3 to rebound. At this time, the drive shaft 4 will rebound 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 rising process. When the drive shaft 4 enters another limiting groove 701, the second coupling 7 stops rotating.

[0113] A first protrusion 60 is provided on the side wall of the circular ring, and a limiting groove 701 matching the first protrusion 60 is provided on the side wall of the mounting base 1 , and the first protrusion 60 is installed in the limiting groove 701 .

[0114] It should be noted that both the first inclined surface 304 and the second inclined surface 702 are inclined straight surfaces, and the third inclined surface 703 is an inclined curved surface.

[0115] 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 achieve closing or opening operations.

[0116] It should be noted that a square hole 801 is provided at the bottom of the third coupling 8, and a square column 13 is provided on the contact rotating seat. When the square hole 801 of the third coupling 8 is inserted into the square column 802, the connection between the third coupling 8 and the contact rotating seat is realized (as shown in Figure 10).

[0117] It should be noted that the rotation of the second coupling 7 drives the rotation of the third coupling 8 , thereby driving the rotation of the contact 12 .

[0118] As shown in FIG11 , the rotary opening and closing isolation unit 100A includes a unit accommodating disk 10 , a moving contact 20 , a stationary contact piece 30 , an arc extinguishing grid piece group 40 and a permanent magnet.

[0119] The upper end face of the accommodating disk (not shown in the drawings) and the lower end face of the accommodating disk (not shown in the drawings) of the rotating opening and closing isolation unit 100A are relative and parallel in the shell height direction. The upper end face of the accommodating disk and the lower end face of the accommodating disk respectively have an external coupling part (not shown in the drawings) and an external coupling matching part (not shown in the drawings). The two unit accommodating disks 10 are coupled through the concave-convex matching of the external coupling part and the external coupling matching part. Specifically, multiple rotating opening and closing isolation units 100A are linearly coupled through the linear coupling of the unit accommodating disks 10.

[0120] As shown in Figure 12, the unit accommodating disk 10 includes a moving contact setting area 11, two static contact piece 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 in the moving contact setting area 11, and the direction extending along the height direction of the unit accommodating disk 10 is used as the shell height direction D. Specifically, the moving contact setting area 11, the two static contact piece mounting positions 12, the two arc extinguishing positions 13, and the two magnet embedding positions 14 are all sunken structures formed by the unit accommodating disk 10. In this embodiment, the unit accommodating disk 10 is a rectangular disk with an upper opening, having a detachable rectangular outline frame, the external coupling portion is a protrusion of the outline frame, and the external coupling mating portion is a recess of the outline frame. The moving contact setting area 11 is sunken in a cylindrical shape, and the coupling through hole 15 is coaxial with the moving contact setting area 11. The two unit accommodating disks 10 are coupled in the shell height direction D.

[0121] The two static contact mounting positions 12 and the two arc extinguishing positions 13 are both located near the moving contact setting area 11, the static contact mounting position 12 is located near the arc extinguishing position 13, and the two static contact mounting positions 12 and the two arc extinguishing positions 13 are distributed in a rotating array with the center of the moving contact setting area 11 as the fixed point, and the magnet embedding positions 14 are divided into two pairs, and each pair of magnet embedding positions 14 is correspondingly arranged near each arc extinguishing position 13. In this embodiment, each pair of magnet embedding positions 14 is respectively arranged on both sides of each arc extinguishing position 13, and one of each pair of magnet embedding positions 14 is located in the moving contact setting area and corresponds to the static contact mounting position 12.

[0122] The moving contact 20 is rotatably disposed in the moving contact arrangement area 11 . Specifically, the moving contact 20 rotates with the center of the moving contact arrangement area 11 as a rotation center.

[0123] As shown in FIG. 13 to FIG. 15 , the movable contact 20 includes a contact housing 21 , a movable contact piece 22 and an intermediate spring piece 24 .

[0124] The direction in which the contact housing 21 extends along the height direction of the unit accommodating tray 10 is the housing height direction D. The contact housing 21 includes two contact half-shells 21 a mated along the housing height direction D.

[0125] The contact shell 21 has an upper end face of the shell (not shown in the drawings) and a lower end face of the shell (not shown in the drawings) that are relative and parallel in the shell height direction D. The upper end face of the shell and the lower end face of the shell respectively have an internal coupling portion 21b and an internal coupling fitting portion 21c. The two contact shells 21 are coupled in the shell height direction D by the concave-convex fitting of the internal coupling portion 21b and the internal coupling fitting portion 21c, and the coupling part of the internal coupling portion 21b and the internal coupling fitting portion 21c passes through the coupling through hole 15, and is connected to the external rotating shaft through the internal coupling portion 21b at the top of the rotating opening and closing isolating switch 100, so that multiple rotating opening and closing isolating units 100A can rotate synchronously under the drive of the external rotating shaft input torque, that is, the contact shell 21 rotates on its own under the drive of the external rotating shaft input torque.

[0126] A movable contact piece accommodating cavity 211 and a parking cavity 212 are formed inside the contact housing 21 . In this embodiment, the contact housing 21 is in the shape of a hollow circular cake.

[0127] The movable contact piece accommodating cavity 211 has two conducting openings 2111 open to the outside, and the two conducting openings 2111 are formed on opposite sides of the contact shell 21. Specifically, the movable contact piece accommodating cavity 211 is formed by two contact half shells 21a. In this embodiment, the two conducting openings 2111 extend along the same diameter of the contact shell 21, and the rest of the movable contact piece accommodating cavity 211 except the conducting openings 2111 is olive-shaped, and the extension direction of the olive is the extension direction of the conducting opening 2111, and the center of the olive shape is the rotation center of the contact shell 21.

[0128] The conducting opening 2111 has an avoidance defect sub-opening 2111a. Specifically, the avoidance defect sub-opening 2111a is formed by the cooperation of two contact half shells 21a. In this embodiment, the avoidance defect sub-opening 2111a is formed on the side wall of the conducting opening 2111, and the avoidance defect sub-opening 2111a is a rectangular notch with one side open.

[0129] The parking cavity 212 is open to the outside and communicates with the conductive opening 2111 by avoiding the defective sub-opening 2111a. The parking cavity 212 has a parking rib 2121 along the shell height direction D. In this embodiment, the parking cavity 212 is formed at the edge of the contact shell 21, that is, it is separated by the inner wall of the movable contact piece accommodating cavity 211. The parking rib 2121 is a convex rib extending along the radial direction of the contact shell 21 and having an arched arc cross-section.

[0130] There are two movable contact pieces 22, which are arranged in the movable contact piece accommodating cavity 211, and the two movable contact pieces 22 are corresponding and symmetrically arranged along the shell height direction D, and the two ends of each movable contact piece 22 are respectively located at the two conducting openings 2111, that is, the two ends of each movable contact piece 22 are respectively located at the opposite side edges of the contact shell 21 and exposed to the outside.

[0131] The same moving contact piece 22 is bent and extended along the shell height direction D, and the same end of the two moving contact pieces 22 corresponds to each other along the shell height direction D, so that the two moving contact pieces 22 are cross-arranged in an "X" shape. Specifically, the middle part of the moving contact piece 22 is bent, so that the two moving contact pieces 22 can avoid each other.

[0132] The number of intermediate spring pieces 24 is a pair, which are correspondingly and symmetrically arranged inside the movable contact piece accommodating cavity 211 along the shell height direction D. The two ends of each intermediate spring piece 24 have elastic segments 24a that are tilted in the same direction along the shell height direction D. The elastic segments 24a of a pair of intermediate spring pieces 24 are arranged facing each other. Specifically, the two ends of each center spring piece 24 correspond to the two ends of the movable contact piece 22.

[0133] The two elastic segments 24a of each intermediate spring piece 24 are respectively located at the two conductive openings 2111. The elastic segments 24a are used to elastically press the two ends of each movable 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 movable contact pieces 22 toward each other. Specifically, as shown in Figure 6, the movable contact piece 22 is supported as a whole by the supporting rib 23, and the free end is elastically pressed by the intermediate spring piece 24.

[0134] The two static contact pieces 30 are correspondingly arranged at the two static contact piece mounting positions 12. Specifically, the two static contact pieces 30 are rotated and distributed with the rotation center of the moving contact 20 as a fixed point, and the free ends of the static contact pieces 30 extend into the moving contact setting area 11. When the contact housing 21 drives the moving contact piece 22 to rotate until the static contact piece 30 is inserted between the moving contact piece 22, the moving contact piece 22 and the static contact piece 30 are conductive.

[0135] The two arc-extinguishing grid groups 40 are correspondingly arranged at the two arc-extinguishing positions 13 . Specifically, the arc-extinguishing grid group 40 is composed of a plurality of parallel arc-extinguishing grids.

[0136] Four permanent magnets are correspondingly embedded in four magnet embedding positions 14. Specifically, when an arc is generated between the static contact piece 30 and the moving contact piece 22, the four permanent magnets guide the arc into the arc extinguishing position 13 through the avoidance defect sub-opening 2111a through the magnetic field.

[0137] The working process of the rotary opening and closing disconnector 100 is described below with reference to an embodiment:

[0138] Closing process: When the contact housing 21 rotates, the moving contact piece 22 rotates and the static contact piece 30 is stationary. When the rotation is made to close the circuit by a predetermined angle, the static contact piece 30 is inserted between the two moving contact pieces 22, and the moving contact piece 22 and the static contact piece 30 are connected.

[0139] Opening process: After the circuit breaker is closed, the rotation is continued to reverse to a predetermined opening angle, and the static contact piece 30 rotates until the static contact piece 30 contacts the parking rib 2121, and the parking rib 2121 and the static contact piece 30 have an interference fit.

[0140] In addition, when the circuit breaker is closed next time, the static contact piece 30 overcomes the interference fit with the parking rib 2121 and performs the closing action, and the friction between the static contact piece 30 and the parking rib 2121 causes the dust on the surface of the static contact piece 30 to be scraped off.

[0141] In the above process, during the relative rotation between the static contact piece 30 and the moving contact 20 , the avoidance defect sub-opening 2111 a is used to avoid the static contact piece 30 , thereby avoiding mechanical interference between the static contact piece 30 and the moving contact 20 .

[0142] During the above-mentioned opening / closing process, when one of the semi-cylinders 21 in the operating mechanism passes through the notch 303 on one of the slots 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 passes through the inclined surface 302 from the highest point of the other slot 301 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, when the first spring 6 goes from compression to rebound, it is counted as one cycle. At this time, the angles rotated by the first coupling 2 are as follows:

[0143] A. When the first coupling 2 rotates 90 degrees clockwise or counterclockwise, it is a cycle, such as a closing operation;

[0144] B. When the first coupling 2 rotates 180 degrees clockwise or counterclockwise, it is one cycle, such as a tripping operation;

[0145] C. When the first coupling 2 rotates 270 degrees clockwise or counterclockwise, it is one cycle, such as a closing operation;

[0146] D. When the first coupling 2 rotates 360 degrees clockwise or counterclockwise, it is one cycle, such as a tripping operation.

[0147] Example 2

[0148] This embodiment is basically the same as the embodiment 1, except that the inclined surface 302 is an inclined straight surface.

[0149] The above shows and describes 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. Various changes and improvements can be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotary isolating switch, characterized in that: The isolating unit comprises an operating mechanism and a plurality of mutually linearly coupled rotating opening and closing switches, wherein the operating mechanism comprises an operating rod assembly, a first spring and a rotating disk assembly, and the operating rod assembly comprises a first coupling and a guide member, wherein the first coupling cooperates with the guide member so that 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 member, and the lower end of the first spring is mounted on the turntable assembly; The rotating disk assembly includes a second coupling, the second coupling cooperates with the guide member, and is used for the guide member to move axially back and forth in the second coupling under the assistance of the first spring, 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 a moving contact is installed below the moving contact rotating seat; Each of the isolation units includes a unit accommodating disk, and a moving contact setting area is provided in the unit accommodating box. The moving contact can be rotatably set in the moving contact setting area and is connected to or separated from the static contact piece in the unit accommodating disk, so as to realize the power on and off of the isolation unit by driving the opening and closing of the isolation unit through the operating mechanism.

2. A rotary isolating switch according to claim 1, characterized in that: The operating mechanism also includes a mounting base, in which a first coupling and a guide member for manual rotation, a first spring and a turntable assembly are sequentially mounted from top to bottom; The first coupling is provided with a plurality of semi-cylinders; The guide member is a guide block, a circular ring and a cylindrical barrel connected in sequence from top to bottom; The top of the guide block is provided with a plurality of slots with a side wall being an inclined surface, and when each of the semi-cylinders passes through the inclined surface to the bottom of the slot, the radial movement of the first coupling is realized to drive the guide member to move axially; 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 inner bottom of the mounting base; The cylindrical tube is sleeved inside the second coupling, and when the semi-cylinder contacts and rotates with the inclined surface of the notch on one side wall, the cylindrical tube and the first spring move axially on the second coupling; The cylindrical tube is provided with a driving assembly, and the interior of the second coupling is provided with an auxiliary structure for matching the driving assembly, so that the driving assembly, with the assistance of the auxiliary structure, drives the second coupling to move radially by the axial movement of the driving assembly.

3. A rotary isolating switch according to claim 1, characterized in that: The number of the semi-cylinders is four, and the number of the notches on the guide block is also four; When one of the semi-cylinders passes through the notch in one of the slots, the inclined surface, and the notch in the other slot in sequence, the first coupling realizes the back-and-forth axial movement of the guide member under the conditions of rotating 90°, 180°, 270° and 360°.

4. A rotary isolating switch according to claim 1, characterized in that: The driving assembly includes a driving shaft and two arc blocks. The driving shaft is installed in a driving groove in the cylindrical barrel, and a second spring is also arranged in the driving groove. The second spring is used to limit the axial movement of the driving shaft and play a buffering role on the driving shaft. Two arc blocks are respectively arranged on the lower side wall of the circular ring, and each of the arc blocks is provided with a first inclined surface; the side walls of the second protrusion on the second coupling are respectively provided with a second inclined surface, and the first inclined surface matches the second inclined surface; The auxiliary structure includes four limit grooves arranged on the second coupling, and a third inclined surface is arranged inside each limit groove, and the position at the lowest point of the third inclined surface is 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, so that the second coupling starts to rotate, and when the semi-cylinder passes over 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 member causes the guide member to rebound. At this time, the drive shaft will rebound along the third inclined surface in the limit groove, so that the drive shaft drives the second coupling to rotate during the rising process. When the drive shaft enters another limit groove, the second coupling stops rotating.

5. A rotary isolating switch according to claim 1, 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 to achieve closing or opening operations.

6. A rotary isolating switch according to claim 1, characterized in that: The unit accommodating disk further includes two static contact piece installation positions, two arc extinguishing positions and four magnet embedding positions, and the isolation unit further includes two static contact pieces, which are correspondingly arranged at the two static contact piece installation positions; Two arc extinguishing grid groups are arranged correspondingly at the two arc extinguishing positions; Four permanent magnets are correspondingly embedded in the four magnet embedding positions. Among them, the two static contact installation positions and the two arc extinguishing positions are both located near the moving contact setting area, the static contact installation position is located near the arc extinguishing position, and the two static contact installation positions and the two arc extinguishing positions are distributed in a rotating array with the rotation center of the moving contact as a fixed point, and the four magnet embedding positions are divided into two pairs, and each pair of the magnet embedding positions is correspondingly arranged near the two sides of each of the arc extinguishing positions.

7. A rotary isolating switch according to claim 6, characterized in that: in, The moving contact comprises a contact housing and a moving contact piece arranged inside the contact housing; the moving contact housing has a housing height direction extending along the height direction of the unit accommodating plate, There are two movable contact pieces, which are arranged correspondingly and symmetrically along the height direction of the shell. The two ends of each movable contact piece are respectively located at the opposite side edges of the movable contact shell and exposed to the outside. When the stationary contact piece is inserted between the two moving contact pieces, the moving contact piece is electrically connected to the stationary contact piece.

8. A rotary isolating switch according to claim 6, characterized in that: in, The same moving contact piece is bent and extended along the shell height direction, and the same end portions of the two moving contact pieces correspond to each other along the shell height direction, so that the two moving contact pieces are cross-arranged in an "X" shape.

9. A rotary isolating switch according to claim 6, characterized in that: The moving contact also includes an intermediate spring sheet, both ends of which have elastic segments that are tilted in the same direction along the shell height direction. The two elastic segments of the intermediate spring piece are respectively located corresponding to the two conducting openings, and the elastic segments are used to elastically press the two ends of the moving contact piece in the same direction; There is a pair of intermediate spring sheets, and the elastic segments of the pair of intermediate spring sheets are arranged facing each other, so that the two elastic segments are used to elastically press the two ends of the two moving contact sheets toward each other.

10. A rotary isolating switch according to any one of claims 6 to 9, characterized in that: in, The unit accommodating disk has a coupling through hole located in the movable contact setting area, and an upper end surface of the accommodating disk and a lower end surface of the accommodating disk that are opposite and parallel in the shell height direction. The upper end surface of the accommodating disk and the lower end surface of the accommodating disk respectively have an external coupling part and an external coupling matching part. The two unit accommodating disks are coupled in the shell height direction through the concave-convex matching of the external coupling part and the external coupling matching part. The contact shell has an upper end surface and a lower end surface of the shell that are opposite and parallel in the shell height direction, and the upper end surface of the shell and the lower end surface of the shell respectively have an internal coupling portion and an internal coupling matching portion, and the two contact shells are coupled in the shell height direction through the concave-convex matching of the internal coupling portion and the internal coupling matching portion, and the coupling parts of the internal coupling portion and the internal coupling matching portion pass through the coupling through hole.

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