High-reliability isolating switch

Abstract

The utility model relates to the technical field of disconnecting switches, and discloses a high-reliability disconnecting switch which comprises a base, insulators installed on the two sides of the base, wiring boards and a knife switch, the wiring boards are installed at the ends, away from the base, of the two insulators respectively, and a connecting rod and a conducting rod are installed at the two ends of the knife switch respectively. The connecting rod is hinged to the wiring board, the conducting rod is movably connected with the wiring board on one side far away from the connecting rod, the limiting piece comprises a lapping seat and an abutting seat, the lapping seat is located on one side, facing the wiring board, of the conducting rod, one side, facing the conducting rod, of the lapping seat abuts against the conducting rod, and the abutting seat abuts against the conducting rod. The abutting seat is located on the side, facing the connecting rod, of the conducting rod, the lapping seat is fixedly connected with the abutting seat, the position of the limiting piece is clamped through the structural strength of fixed connection of the conducting rod and the knife switch, the wiring part at one end of the limiting piece is prevented from deforming, and therefore the connection reliability of the wiring board is improved, and the connection strength between the knife switch and the wiring board is improved.

Description

Technical Field

[0001] This application relates to the field of disconnector technology, and in particular to a highly reliable disconnector. Background Technology

[0002] Three-phase disconnect switches play a crucial role in power systems. They not only ensure the safe isolation of circuits but also enable circuit switching and transformer operation when necessary. When selecting and using three-phase disconnect switches, relevant international and national standards should be strictly followed to ensure that the performance and safety of the equipment meet the requirements.

[0003] For example, patent number CN219998100U discloses a disconnecting switch. First, the base is fixedly installed, and the wiring part is connected to the cable. When the disconnecting switch needs to be connected to power, the mounting plate is fixed to the inside of the connecting knife switch with mounting bolts. At the same time, the rotating plate is rotatably connected to the mounting plate through the connecting column. The rotation of the rotating plate can drive the contact tongue plate at its end to rotate, so that the contact tongue plate can accurately contact the contact plate during the switching operation, thereby achieving a precise electrical connection.

[0004] However, in actual use, due to the combined effects of gravity and tension on the wiring terminals at both ends during installation and use, the insulating ring may experience a bending force. Under prolonged use, the disconnect switch latch may break, causing the entire switch to fall off and resulting in a fault in the entire circuit. Utility Model Content

[0005] To improve the reliability of the connection between the knife switch and the terminal block, a highly reliable disconnecting switch is provided.

[0006] The above-mentioned objective of this application is achieved through the following technical solution:

[0007] A highly reliable disconnecting switch includes a base, insulators mounted on both sides of the base, a terminal block, and a knife switch. The terminal block is respectively mounted on the ends of the two insulators away from the base. A connecting rod and a conductive rod are respectively mounted on both ends of the knife switch. The connecting rod is hinged to the terminal block, and the conductive rod is movably connected to the terminal block on the side away from the connecting rod. The switch also includes a limiting member, which includes a mounting seat and a pressing seat. The mounting seat is located on the side of the conductive rod facing the terminal block and abuts against the conductive rod. The pressing seat is located on the side of the conductive rod facing the connecting rod, and the mounting seat and the pressing seat are fixedly connected.

[0008] By adopting the above technical solution, after prolonged use, the cable, due to its own weight, will continuously compress the terminal block towards the base. The end of the terminal block away from the cable connection will deform. A limiting component is added, and the mounting base of the limiting component abuts against the conductive rod. The pressing base will press against the conductive rod. Since the distance between the conductive rod and the connecting rod remains unchanged, when the limiting component abuts against the conductive rod, the limiting component will force the conductive rod to move away from the connecting rod. The conductive rod will apply pressure towards the limiting component, restricting the position of the limiting component and preventing deformation of the wiring part at one end of the limiting component. This increases the connection reliability of the terminal block and increases the connection strength between the switch and the terminal block.

[0009] Optionally, the fixed connection between the pressure seat and the support seat is smooth.

[0010] By adopting the above technical solution, both the pressure seat and the lap seat abut against the conductive rod. The fixed connection between the pressure seat and the lap seat is made to be smooth, which increases the contact area between the pressure seat, the lap seat and the conductive rod, and increases the structural strength of the snap-fit ​​between the conductive rod and the limiting member.

[0011] Optionally, the conductive rod is placed on the mounting base, and the two ends of the switch are on the same horizontal line.

[0012] By adopting the above technical solution, the pressure seat can contact and abut against the conductive rod more quickly. If the height of the mounting seat along the axial direction of the insulator is too low, the cable needs to apply pressure to the contact plate for a longer time before the pressure seat can contact and abut against the conductive rod.

[0013] Optionally, the terminal block includes a fixing part and a wiring part, the fixing part and the wiring part are fixedly connected, and the fixing part is located on the side of the pressure seat facing away from the conductive rod.

[0014] By adopting the above technical solution, on the one hand, it can better adapt to the current flow path and reduce the generation of resistance and electric arc; on the other hand, when the limiting part is squeezed by the conductive rod for a long time, the limiting part may deform. The fixing part abuts against the pressure seat, and the mounting seat abuts against the wiring part, which can increase the connection strength between the limiting part and the wiring plate and improve the structural strength between the conductive rod and the limiting part and the wiring plate.

[0015] Optionally, the knife gate includes two gate plates, each with a boss mounted on the side facing the fixing part.

[0016] By adopting the above technical solution, when the switch is lowered from the vertical terminal block state, the two terminal blocks are electrically connected through the switch. A boss is added to the side of the switch facing the fixed part, which increases the contact force between the two switches and the fixed part, and increases the friction between the boss and the fixed part, so that the electrical connection between the fixed part and the two switches is better.

[0017] Optionally, the breaker also includes a pin and a pin. Both breaker plates have through holes on the side near the connecting rod for the pin to pass through. The end of the pin that passes through the through hole has a pin hole, which is inserted into the pin.

[0018] By adopting the above technical solution, a pin and pin insertion structure is added to one side of the connecting rod, making the connection between the two gate plates of the switch more reliable. When the switch opens and closes with the connecting rod as the axis, the structural stability of the side of the switch close to the connecting rod is improved.

[0019] Optionally, the limiting component further includes a connecting piece, which is fixedly connected to the mounting base and to the wiring plate by bolts.

[0020] By adopting the above technical solution, the connection strength between the limiting component and the terminal block is improved. The limiting component can move in the direction of the terminal block. When the limiting component is subjected to the pressure of the conductive rod, the terminal block is also subjected to pressure along with the limiting component.

[0021] Optionally, the number of mounting seats is two, and the two mounting seats abut against the conductive rod on the side facing the conductive rod.

[0022] By adopting the above technical solution, both mounting bases abut against the conductive rod, increasing the strength of the abutment between the conductive rod and the mounting base. This makes the connection between the conductive rod and the limiting component more stable and the electrical connection effect better when the conductive rod is placed on the mounting base.

[0023] In summary, this application has at least the following beneficial effects:

[0024] 1. After prolonged use, the cables of the disconnecting switch will exert pressure on the wiring section for an extended period. The connection structure between the conductive rod, connecting rod, and switch ensures that the distance between the conductive rod and connecting rod remains constant. The conductive rod engages with the limiting component, which restricts the position of the limiting component and prevents deformation of the wiring section at one end of the limiting component. This prevents the connecting components on the switch from disengaging from the wiring plate at one end of the conductive rod, thereby increasing the connection reliability of the wiring plate and enhancing the electrical connection effect between the switch and the wiring plate. Attached Figure Description

[0025] Figure 1 A schematic diagram of the structure of a high-reliability disconnector. Figure 1 ;

[0026] Figure 2 A schematic diagram of the structure of a high-reliability disconnector. Figure 2 ;

[0027] Figure 3 for Figure 2 A magnified view of a portion at point A;

[0028] Figure 4 This is an exploded schematic diagram showing the hinged connection between the knife gate and the hinge seat.

[0029] Figure 5 This is a structural diagram of the fixed component;

[0030] Figure 6 This is a structural diagram of the connecting components;

[0031] Figure 7 This is a cross-sectional view of a highly reliable disconnecting switch.

[0032] Reference numerals: 1. Base; 2. Insulator; 21. Insulating core rod; 22. Insulating ring; 3. Terminal block; 31. Wiring part; 311. Cable end; 32. Fixing part; 4. Knife switch; 41. Switch plate; 411. Boss; 412. Perforation; 42. Connecting rod; 43. Conductive rod; 44. Fixing assembly; 441. First blocking block; 442. Support spring; 443. Second blocking block; 444. Limiting nut; 45. Pin; 451 46. ​​Pin; 47. First rotating rod; 48. Second rotating rod; 5. Connecting assembly; 51. Fastener; 511. Cylindrical part; 512. Triangular part; 52. Locking fastener; 521. Locking hook; 53. Pull ring; 54. Torsion spring; 6. Limiting part; 61. Pressing seat; 62. Laying seat; 63. Connecting piece; 7. Contact piece; 8. Hinge seat; 81. Mounting part; 82. Hinge part; 821. Hinge plate; 8211. Hinge hole. Detailed Implementation

[0033] The following section provides a more detailed description, in conjunction with the accompanying diagrams:

[0034] As attached Figure 1 As shown, a highly reliable disconnecting switch includes a base 1, an insulator 2, a terminal block 3, a knife switch 4, a connecting assembly 5, and a limiting member 6.

[0035] The insulator 2 includes an insulating core rod 21 and insulating rings 22. There are two insulating core rods 21, which are respectively installed on both sides of the top of the base 1, and both insulating core rods 21 are perpendicular to the base 1. There are multiple insulating rings 22, which are made of silicone rubber and are evenly spaced on the outer peripheral sidewalls of the insulating core rods 21.

[0036] As attached Figure 2 and attached Figure 3 As shown, there are two junction boxes 3. Each junction box 3 includes a wiring section 31, which is fixedly connected to the end of the insulating core rod 21 away from the base 1 by bolts. A fixing part 32 is provided on the side where the ends of the two wiring sections 31 are close together. The fixing part 32 is fixedly connected to the wiring section 31 and is perpendicular to the wiring section 31. Each of the two wiring sections 31 has a cable end 311 for cable connection on the side away from the fixing part 32.

[0037] The switch 4 includes two relatively parallel gate plates 41. A connecting rod 42 and a conductive rod 43 are respectively installed at both ends of the switch 4. The connecting rod 42 and the conductive rod 43 are perpendicular to the two gate plates 41.

[0038] As attached Figure 2 and attached Figure 4 As shown, a hinge seat 8 is also installed on the terminal block 3 near the connecting rod 42. The hinge seat 8 includes a mounting part 81 and a hinge part 82. The mounting part 81 is fixedly connected to the end of the terminal block 31 away from the cable end 311 by bolts. The hinge part 82 includes two relatively parallel hinge plates 821. One end of each of the two hinge plates 821 is fixedly connected to the mounting part 81 perpendicularly.

[0039] Two relatively parallel hinge plates 821 each have hinge holes 8211 penetrating through them, and the axial direction of the hinge holes 8211 is parallel to the axial direction of the connecting rod 42. One end of the connecting rod 42 passes through the hinge holes 8211 of the two hinge plates 821 in sequence, and the two gate plates 41 are hinged to the hinge seat 8 via the connecting rod 42. At the same time, the two gate plates 41 respectively contact the outer surfaces of the two hinge plates 821, making the switch 4 more accurately and smoothly connected during operation.

[0040] As attached Figure 2 and attached Figure 5 As shown, there are two fixing components 44. One fixing component 44 is installed at one end of the connecting rod 42 that passes through the two gate plates 41. The fixing component 44 includes a first blocking block 441, a support spring 442, a second blocking block 443, and a limiting nut 444. The first blocking block 441, the support spring 442, the second blocking block 443, and the limiting nut 444 are sequentially sleeved on one end of the connecting rod 42 that passes through the two gate plates 41, and the limiting nut 444 is located at the end of the connecting rod 42 that passes through the two gate plates 41. The limiting nut 444 is tightened toward the gate plate 41. The support spring 442 between the first blocking block 441 and the second blocking block 443 will provide elastic support, making the connection between the two gate plates 41 and the hinge seat 8 more reliable.

[0041] Another fixing component 44 is installed at one end of the conductive rod 43 that passes through the two gates 41, making the connection between the two gates 41 and the conductive rod 43 more reliable.

[0042] As attached Figure 2 and attached Figure 4 As shown, the two gate plates 41 are provided with protrusions 411 on the side facing the fixed part 32. When the switch 4 is rotated down from the state of the vertical connection part 31, the two connection parts 31 are electrically connected through the switch 4. The protrusions 411 abut against the fixed part 32, which increases the contact force of the two gate plates 41 towards the fixed part 32 and increases the friction between the protrusions 411 and the fixed part 32, so that the electrical connection effect between the fixed part 32 and the two gate plates 41 is better.

[0043] The switch 4 also includes a pin 45 and a pin 46. The two gate plates 41 have through holes 412 on the side near the connecting rod 42 for the pin 45 to pass through. One end of the pin 45 has a pin hole 451. The pin 45 with the pin hole 451 passes through the through holes 412 on the two gate plates 41 in sequence and is inserted into the pin 46, making the connection between the two gate plates 41 of the switch 4 more reliable. When the switch 4 is opened and closed with the connecting rod 42 as the axis, the structural stability of the side of the switch 4 near the connecting rod 42 is improved.

[0044] As attached Figure 6 and attached Figure 7 As shown, the connecting assembly 5 includes a fastener 51, a locking element 52, a pull ring 53, and a torsion spring 54.

[0045] A contact piece 7 is also installed on the insulating core rod 21 located on one side of the conductive rod 43. The contact piece 7 is located between the insulating core rod 21 and the wiring part 31, and the contact piece 7 and the wiring part 31 are relatively parallel.

[0046] A first rotating rod 47 and a second rotating rod 48 are installed between the two gate plates 41, and the first rotating rod 47 and the second rotating rod 48 are relatively parallel.

[0047] The first rotating rod 47 is located on the side of the fixed part 32 facing away from the conductive rod 43, and a torsion spring 54 and a locking member 52 are sequentially sleeved on the first rotating rod 47.

[0048] A locking hook 521 is fixedly connected to one end of the locking fastener 52. The connection between the locking hook 521 and the locking fastener 52 is smooth. The side of the locking hook 521 facing the contact piece 7 is parallel to the plane of the terminal block 3, and the side of the locking hook 521 facing the contact piece 7 abuts against the contact piece 7. One end of the torsion spring 54 is fixedly connected to the gate plate 41, and the other end of the torsion spring 54 presses against the back of the hook 521.

[0049] The second rotating rod 48 is located on the side of the first rotating rod 47 facing away from the fixed part 32. The fastener 51 includes a cylindrical part 511 and a triangular part 512. The cylindrical part 511 is sleeved on the second rotating rod 48, and the triangular part 512 is located on the side of the cylindrical part 511 facing the conductive rod 43. The triangular part 512 abuts against the end of the locking member 52 facing away from the fixed part 32.

[0050] The pull ring 53 is ring-shaped. Two protrusions are installed on the side of the pull ring 53 facing the fastener 51 and the locking member 52. One protrusion is fixedly connected to the cylindrical part 511, and the other protrusion abuts against the side of the locking member 52 facing the pull ring 53.

[0051] When the switch 4 is lowered to close the circuit, the locking element 52 contacts the upper surface of the contact piece 7. The locking element 52 first rotates counterclockwise. After the switch 4 is pressed into place, the locking hook 521 of the locking element 52 will be pressed against the lower part of the contact piece 7 under the action of the torsion spring 54. When the switch 4 is lifted upward, the locking element 52 will press down the fastener 51 to make the pull ring 53 rotate counterclockwise. The pull ring 53 will descend and press against the locking element 52, so that the side of the locking hook 521 facing the contact piece 7 abuts against the lower surface of the contact piece 7, ensuring the stability of the connection and thus achieving a precise electrical connection.

[0052] When it is necessary to open, turn the pull ring 53 clockwise to make the locking hook 521 rotate counterclockwise away from the lower part of the contact piece 7, at which point the switch 4 can be opened.

[0053] As attached Figure 2 and attached Figure 6 As shown, a limiting member 6 is also installed at the end of the wiring part 31 near the fixing part 32, and the limiting member 6 is located on the side of the fixing part 32 facing the conductive rod 43. The limiting member 6 includes a pressing seat 61, a mounting seat 62, and a connecting piece 63. The connecting piece 63 is located on the side of the wiring part 31 away from the insulating core rod 21, and the connecting piece 63, the wiring part 31, the contact piece 7, and the insulating core rod 21 are sequentially fixedly connected by the same bolt.

[0054] The mounting bracket 62 is located on the side of the conductive rod 43 facing the wiring part 31. There are two mounting brackets 62, which are parallel to each other. The ends of the two mounting brackets 62 facing the wiring part 31 are fixedly connected to the connecting piece 63, and the ends of the two mounting brackets 62 facing away from the connecting piece 63 are in contact with the conductive rod 43. When the two mounting brackets 62 are in contact with the conductive rod 43, the two ends of the switch 4 are on the same horizontal line.

[0055] The pressure seat 61 is located on the side of the conductive rod 43 facing the fixing part 32. There are two pressure seats 61. The two pressure seats 61 are fixedly connected to the ends of the two mounting seats 62 facing away from the connecting piece. The angle between the pressure seat 61 and the mounting seat 62 is greater than or equal to 90° and less than 180°. This makes it convenient for the conductive rod 43 to be placed on the mounting seat 62, and also allows the pressure seat 61 to contact and press against the conductive rod 43.

[0056] The angle between the side of the pressure seat 61 facing the conductive rod 43 and the side of the support seat 62 facing the conductive rod 43 is 135°, and the connection is smooth. Both the pressure seat 61 and the support seat 62 abut against the conductive rod 43, increasing the contact area between the pressure seat 61, the support seat 62 and the conductive rod 43, and increasing the clamping force between the limiting member 6 and the conductive rod 43.

[0057] The working principle of this embodiment is as follows:

[0058] First, the base 1 is fixedly installed, and then the insulating core rod 21, terminal block 3, switch 4 and connecting assembly 5 are installed in sequence. Finally, the terminal block 31 is connected to the cable. When the switch 4 is placed on the pressure seat 61 from the vertical terminal block 31 position, the locking member 52, under the action of the torsion spring 54, will press down on the fastener 51 to make the pull ring 53 rotate counterclockwise. The pull ring 53 will descend and press against the locking member 52, so that the locking hook 521 abuts against the lower end face of the contact piece 7, and the two terminal blocks 31 are electrically connected through the closing of the switch 4.

[0059] Meanwhile, after prolonged use, the cable will exert pressure on the wiring section 31 due to its own weight. The fixed connection between the side of the pressure seat 61 facing the conductive rod 43 and the side of the mounting seat 62 facing the conductive rod 43 is smooth, and the smooth transition point abuts against the conductive rod 43. The conductive rod 43 and the connecting rod 42 are both fixedly connected to the switch 4. When the limiting member 6 abuts against the conductive rod 43, the limiting member 6 forces the conductive rod 43 to move away from the connecting rod 42. Since the distance between the conductive rod 43 and the connecting rod 42 remains unchanged, the conductive rod 43 continuously applies pressure to the limiting member 6 towards the smooth transition point, restricting the position of the limiting member 6. This allows the contact piece 7 to abut against the locking hook 521 more tightly, preventing the cable from applying pressure towards the cable end 311 and causing deformation of the wiring section 31 at one end of the limiting member 6, thus improving the electrical connection effect between the two wiring boards 3.

[0060] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of protection claimed in this application.

Claims

1. A highly reliable disconnecting switch, comprising a base (1), insulators (2) mounted on both sides of the base (1), a terminal block (3), and a knife switch (4), wherein the terminal block (3) is respectively mounted on the ends of the two insulators (2) away from the base (1), and the two ends of the knife switch (4) are respectively equipped with a connecting rod (42) and a conductive rod (43), wherein the connecting rod (42) is hinged to the terminal block (3), and the conductive rod (43) is movably connected to the terminal block (3) on the side away from the connecting rod (42), characterized in that, It also includes a limiting member (6), which includes a mounting base (62) and a pressing base (61). The mounting base (62) is located on the side of the conductive rod (43) facing the terminal block (3). The side of the mounting base (62) facing the conductive rod (43) abuts against the conductive rod (43). The pressing base (61) is located on the side of the conductive rod (43) facing the connecting rod (42), and the mounting base (62) and the pressing base (61) are fixedly connected.

2. The high-reliability disconnecting switch according to claim 1, characterized in that, The connection between the pressure seat (61) and the support seat (62) is smooth.

3. The high-reliability disconnecting switch according to claim 1, characterized in that, The conductive rod (43) is placed on the mounting base (62), and the two ends of the switch (4) are on the same horizontal line.

4. A high-reliability disconnecting switch according to claim 1, characterized in that, The terminal block (3) includes a fixing part (32) and a wiring part (31). The fixing part (32) and the wiring part (31) are fixedly connected, and the fixing part (32) is located on the side of the pressure seat (61) facing away from the conductive rod (43).

5. A high-reliability disconnecting switch according to claim 4, characterized in that, The guillotine (4) includes two gate plates (41), and each gate plate (41) has a boss (411) installed on one side facing the fixing part (32).

6. A high-reliability disconnecting switch according to claim 5, characterized in that, The guillotine (4) also includes a pin (45) and a pin (46). Both guillotine plates (41) have through holes (412) on the side near the connecting rod (42) for the pin (45) to pass through. The end of the pin (45) that passes through the through hole (412) has a pin hole (451) and the pin (451) is inserted into the pin (46).

7. A high-reliability disconnecting switch according to claim 1, characterized in that, The limiting member (6) also includes a connecting piece (63), which is fixedly connected to the mounting base (62), and the connecting piece (63) is fixedly connected to the wiring plate (3) by bolts.

8. A high-reliability disconnecting switch according to claim 1, characterized in that, The number of the mounting bases (62) is two, and the two mounting bases (62) abut against the conductive rod (43) on the side facing the conductive rod (43).

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