Interlocking mechanism and interlocking method of visual breaking point load isolation switch

Abstract

The application relates to a locking mechanism and locking method of a visual breakpoint load isolation switch and belongs to the technical field of isolation switches. The technical scheme is as follows: the isolation switch (1) is arranged on the outer side of a mounting plate (2), a U-shaped frame (3) is arranged on the inner side of the mounting plate (2), a recess (7) is located in the U-shaped frame (3), a door pressing plate (6) corresponding to the recess (7) is arranged on a distribution box door, a shaft sleeve (5) is arranged on a square shaft (4) of the isolation switch (1), the shaft sleeve (5) is in a rectangular section, and the shaft sleeve (5) is located at a slot opening (15) of the recess. The positive effect of the application is that the isolation switch cannot be closed when the distribution box door is opened, the distribution box door cannot be opened after the isolation switch is closed, and the distribution box door can be opened after the isolation switch is opened; the locking mechanism is flexible in operation, does not appear to be stuck, the mechanism is simplified, and the manufacturing cost is reduced.

Description

Technical Field

[0001] This invention relates to an interlocking mechanism and interlocking method for a visually disconnected load disconnector, belonging to the field of disconnector technology. Background Technology

[0002] Visual disconnect load break switches (VCS) are widely used in power distribution and automation systems in construction, power, petrochemical, and other industries. Developed alongside industrial advancements, VCS are field-mounted motor disconnection switches designed to ensure the safety of on-site maintenance personnel. However, VCS imposes strict requirements on the mechanical interlocking mechanism, ensuring that the switch cannot close when the distribution box door is open and can close when the door is closed. Existing interlocking mechanisms suffer from several drawbacks: they are inflexible, prone to jamming, complex, and costly to manufacture. Summary of the Invention

[0003] The purpose of this invention is to provide an interlocking mechanism and method for a visual breakpoint load disconnect switch. The interlocking mechanism is flexible in operation, does not jam, simplifies the mechanism, reduces manufacturing costs, and solves the above-mentioned problems existing in the background art.

[0004] The technical solution of this invention is:

[0005] An interlocking mechanism for a visual disconnect load disconnect switch includes a disconnect switch, a mounting plate, a U-shaped frame, a door pressure plate, and a groove. The mounting plate is located inside a distribution box. The disconnect switch is positioned on the outer side of the mounting plate, and the U-shaped frame is positioned on the inner side of the mounting plate. The mounting plate has groove mounting holes. The U-shaped frame is fastened around the groove mounting holes on the mounting plate. The groove slides within the groove mounting holes and is located within the U-shaped frame. The groove's opening passes through the groove mounting holes on the mounting plate. A pin is fixed to the bottom of the groove, passing through the U-shaped frame and slidingly positioned on it. A spring is provided on the pin between the bottom of the groove and the U-shaped frame.

[0006] The distribution box door is equipped with a door pressure plate that matches the groove. The extended end of the door pressure plate has two pressure arms that match the groove. Each pressure arm has an inward folded edge. The two pressure arms and the two folded edges together form a rectangular cavity. The opening of the rectangular cavity is formed between the two folded edges. The groove opening corresponds to the opening of the rectangular cavity. The square shaft of the disconnect switch is equipped with a bushing with a rectangular cross-section. The bushing is located at the groove opening. The long side of the rectangular bushing is longer than the groove opening width and also longer than the rectangular cavity opening width, but shorter than the rectangular cavity width. The short side of the rectangular bushing is slightly shorter than the groove opening width and also slightly shorter than the rectangular cavity opening width. The square shaft on the disconnect switch is the opening and closing rotation shaft of the disconnect switch, and the square shaft is inserted into the side of the disconnect switch.

[0007] The groove is a frame structure, which includes a bottom frame and an opening frame. The opening frame has two protruding groove edges that match the two pressure arms on the door pressure plate. The pin is fixed to the bottom frame.

[0008] There are two pins, both of which are fixed to the bottom frame of the groove.

[0009] An interlocking method for a visually disconnected load disconnector, employing the aforementioned interlocking mechanism, includes the following steps:

[0010] When the disconnect switch is in the open position, the short rectangular side of the bushing on the square shaft faces the groove opening. When the distribution box door is open, the door pressure plate will not press the groove. Due to the action of the spring, the groove moves forward, and the bushing is located in the groove opening. Since the length of the short rectangular side of the bushing is slightly smaller than the width of the groove opening, the bushing is stuck in the groove opening, and the square shaft on the bushing cannot rotate. When the distribution box door is open, the disconnect switch cannot be closed.

[0011] When the distribution box door is closed, the door pressure plate presses the groove backward, causing the bushing to leave the groove opening. The short rectangular side of the bushing faces the cavity opening. Since the length of the short rectangular side of the bushing is slightly smaller than the width of the rectangular cavity opening, the bushing can enter the rectangular cavity through the cavity opening. Since the length of the long rectangular side of the bushing is smaller than the width of the rectangular cavity, the bushing can rotate inside the rectangular cavity. When the square shaft on the bushing rotates, the disconnecting switch can be closed. After the disconnecting switch is closed, the long rectangular side of the bushing faces the cavity opening. Since the length of the long rectangular side of the bushing is greater than the width of the rectangular cavity opening, the bushing cannot leave the rectangular cavity and is confined inside the rectangular cavity. Therefore, the distribution box door cannot be opened after the disconnecting switch is closed.

[0012] Only when the disconnecting switch is rotated to the open position, with the short rectangular side of the bushing facing the cavity opening, can the bushing leave the rectangular cavity because the length of the short rectangular side of the bushing is slightly smaller than the width of the rectangular cavity opening. After the disconnecting switch is opened, the distribution box door can be opened.

[0013] The innovation of this invention is that by setting a rectangular cavity with an opening on the door pressure plate and matching it with a movable groove, the opening and closing of the disconnecting switch can be distinguished by the bushing. This allows the disconnecting switch to be unable to close when the distribution box door is open, and the distribution box door to be unable to be opened after the disconnecting switch is closed, but the distribution box door can be opened after the disconnecting switch is open.

[0014] The positive effects of this invention are: the disconnect switch cannot be closed when the distribution box door is open, the distribution box door cannot be opened after the disconnect switch is closed, and the distribution box door can be opened after the disconnect switch is opened; the interlocking mechanism is flexible in operation and will not jam, simplifying the mechanism and reducing manufacturing costs. Attached Figure Description

[0015] Figure 1 This is a schematic front view diagram of an embodiment of the present invention;

[0016] Figure 2 This is a side view schematic diagram of an embodiment of the present invention;

[0017] Figure 3 This is a top view schematic diagram of an embodiment of the present invention;

[0018] In the diagram: 1. Disconnect switch; 2. Mounting plate; 3. U-shaped frame; 4. Square shaft; 5. Bushing; 6. Door pressure plate; 7. Groove; 8. Bottom of groove; 9. Spring; 10. Pin; 11. Pressure arm; 12. Rectangular cavity; 13. Folded edge; 14. Cavity opening; 15. Slot. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0020] An interlocking mechanism for a visual disconnect load disconnect switch includes a disconnect switch 1, a mounting plate 2, a U-shaped frame 3, a door pressure plate 6, and a groove 7. The mounting plate 2 is provided inside the distribution box. The disconnect switch 1 is located on the outside of the mounting plate 2, and the U-shaped frame 3 is located on the inside of the mounting plate 2. The mounting plate 2 has a groove mounting hole. The U-shaped frame 3 is fastened around the groove mounting hole on the mounting plate 2. The groove 7 is slidably disposed in the groove mounting hole. The groove 7 is located inside the U-shaped frame 3. The slot 15 of the groove 7 passes through the groove mounting hole on the mounting plate 2. A pin 10 is fixed at the bottom 8 of the groove. The pin 10 passes through the U-shaped frame and is slidably disposed on the U-shaped frame. A spring 9 is provided on the pin 10 between the bottom 8 of the groove and the U-shaped frame 3.

[0021] The distribution box door is equipped with a door pressure plate 6 that matches the groove 7. The extended end of the door pressure plate 6 is equipped with two pressure arms 11 that match the groove 7. Each pressure arm 11 is equipped with an inward folded edge 13. The two pressure arms 11 and the two folded edges 13 together form a rectangular cavity 12. The cavity opening 14 of the rectangular cavity 12 is formed between the two folded edges. The groove opening 15 of the groove corresponds to the cavity opening 14 of the rectangular cavity 12. The square shaft 4 of the disconnect switch 1 is equipped with a bushing 5. The bushing 5 has a rectangular cross-section. The bushing 5 is located at the groove opening 15 of the groove. The long side of the rectangular bushing 5 is longer than the width of the groove opening 15 and also longer than the width of the cavity opening 14 of the rectangular cavity 12, but shorter than the width of the rectangular cavity 12. The short side of the rectangular bushing 5 is slightly shorter than the width of the groove opening 15 and also slightly shorter than the width of the cavity opening 14 of the rectangular cavity 12. The square shaft 4 on the disconnect switch 1 is the opening and closing rotation shaft of the disconnect switch 1. The square shaft 4 is inserted into the side of the disconnect switch 1.

[0022] The groove 7 is a frame structure, which includes a bottom frame and an opening frame. The opening frame has two protruding groove edges, which match the two pressure arms 11 on the door pressure plate 6 respectively. The pin 10 is fixed on the bottom frame.

[0023] There are two pins 10, both of which are fixed to the bottom frame of the groove.

[0024] An interlocking method for a visually disconnected load disconnector, employing the aforementioned interlocking mechanism, includes the following steps:

[0025] When the disconnect switch is in the open position, the short rectangular side of the bushing 5 on the square shaft 4 faces the groove 15 of the groove 7. When the distribution box door is open, the door pressure plate 6 will not press the groove 7. Due to the action of the spring 9, the groove moves forward and the bushing 5 is located in the groove 15 of the groove 7. Since the length of the short rectangular side of the bushing 5 is slightly smaller than the width of the groove 15, the bushing 5 is stuck in the groove 15 of the groove 7. The square shaft 4 on the bushing 5 cannot rotate, and the disconnect switch 1 cannot be closed when the distribution box door is open.

[0026] When the distribution box door is closed, the door pressure plate 6 presses the groove 7 backward, and the bushing 5 leaves the slot 15 of the groove 7. The short rectangular side of the bushing 5 faces the cavity 14. Since the length of the short rectangular side of the bushing 5 is slightly smaller than the width of the cavity 14 of the rectangular cavity 12, the bushing 5 can enter the rectangular cavity 12 through the cavity 14. Since the length of the long rectangular side of the bushing 5 is smaller than the width of the rectangular cavity 12, the bushing 5 can rotate inside the rectangular cavity 12. The square shaft 4 on the bushing 5 rotates, and the disconnecting switch 1 can be closed. After the disconnecting switch 1 is closed, the long rectangular side of the bushing 5 faces the cavity 14. Since the length of the long rectangular side of the bushing 5 is greater than the width of the cavity 14 of the rectangular cavity 12, the bushing 5 cannot leave the rectangular cavity 12 and is restricted inside the rectangular cavity 12. After the disconnecting switch 1 is closed, the distribution box door cannot be opened.

[0027] Only when the disconnecting switch 1 is rotated to the open position, the short rectangular side of the bushing 5 faces the cavity opening 14. Since the length of the short rectangular side of the bushing 5 is slightly smaller than the width of the cavity opening 14 of the rectangular cavity 12, the bushing 5 can leave the rectangular cavity 12, and the distribution box door can be opened after the disconnecting switch 1 is opened.

[0028] The innovation of this invention is that by setting a rectangular cavity 12 with an opening 14 on the door pressure plate and matching it with a movable groove, the opening and closing of the disconnecting switch 1 can be distinguished by the bushing. This can achieve the following: when the distribution box door is open, the disconnecting switch 1 cannot be closed, and when the disconnecting switch 1 is closed, the distribution box door cannot be opened. However, when the disconnecting switch 1 is open, the distribution box door can be opened.

Claims

1. A method of interlocking visual-break load isolation switches, characterized by: The visual breaking point load isolation switch has a interlocking mechanism, which comprises an isolation switch (1), a mounting plate (2), a U-shaped frame (3), a door pressing plate (6) and a groove (7); the distribution box is provided with the mounting plate (2), the isolation switch (1) is arranged on the outer side of the mounting plate (2), the U-shaped frame (3) is arranged on the inner side of the mounting plate (2), and the mounting plate (2) is provided with a groove mounting hole; the U-shaped frame (3) is buckled around the groove mounting hole on the mounting plate (2), the groove (7) is slidingly arranged in the groove mounting hole, the groove (7) is located in the U-shaped frame (3), the slot (15) of the groove (7) penetrates the groove mounting hole on the mounting plate (2), the groove bottom (8) is fixedly provided with a pin (10), the pin (10) penetrates the U-shaped frame and is slidingly arranged on the U-shaped frame, and the spring (9) is arranged on the pin (10) between the groove bottom (8) and the U-shaped frame (3); The distribution box door is provided with the door pressing plate (6) corresponding to the groove (7), the extending end of the door pressing plate (6) is provided with two pressing arms (11) matched with the groove (7), each pressing arm (11) is provided with an inward folding edge (13), the two pressing arms (11) and the two folding edges (13) together form a rectangular cavity (12), the cavity opening (14) of the rectangular cavity (12) is formed between the two folding edges, and the slot (15) of the groove corresponds to the cavity opening (14) of the rectangular cavity (12); the shaft sleeve (5) is arranged on the square shaft (4) of the isolation switch (1), the cross section of the shaft sleeve (5) is rectangular; the shaft sleeve (5) is located at the slot (15) of the groove; the length of the long side of the rectangular shaft sleeve (5) is greater than the width of the slot (15) of the groove, and simultaneously greater than the width of the cavity opening (14) of the rectangular cavity (12), but less than the width of the rectangular cavity (12); the length of the short side of the rectangular shaft sleeve (5) is slightly less than the width of the slot (15) of the groove, and simultaneously slightly less than the width of the cavity opening (14) of the rectangular cavity (12); The square shaft (4) on the isolation switch (1) is a switching-on and switching-off rotating shaft of the isolation switch (1), and the square shaft (4) is inserted into the side of the isolation switch (1); the interlocking method comprises the following steps: When the isolation switch is in the open position, the short side of the shaft sleeve (5) on the square shaft (4) faces the slot (15) of the groove (7); when the distribution box door is in the open state, the door pressing plate (6) cannot press the groove (7), and the groove moves forward due to the action of the spring (9), the shaft sleeve (5) is located in the slot (15) of the groove (7), the length of the short side of the rectangular shaft sleeve (5) is slightly less than the width of the slot (15) of the groove, the shaft sleeve (5) is clamped in the slot (15) of the groove (7), the square shaft (4) on the shaft sleeve (5) cannot rotate, and the isolation switch (1) cannot be closed when the distribution box door is opened; When the distribution box door is closed, the door pressing plate (6) presses the groove (7) to move backward, the shaft sleeve (5) leaves the notch (15) of the groove (7), the rectangular short side of the shaft sleeve (5) faces the cavity opening (14), because the length of the rectangular short side of the shaft sleeve (5) is slightly smaller than the width of the cavity opening (14) of the rectangular cavity (12), the shaft sleeve (5) can enter the rectangular cavity (12) through the cavity opening (14); because the length of the rectangular long side of the shaft sleeve (5) is smaller than the width of the rectangular cavity (12), the shaft sleeve (5) can rotate in the rectangular cavity (12), the square shaft (4) on the shaft sleeve (5) rotates, and the disconnecting switch (1) can be closed; after the disconnecting switch (1) is closed, the rectangular long side of the shaft sleeve (5) faces the cavity opening (14), because the length of the rectangular long side of the shaft sleeve (5) is greater than the width of the cavity opening (14) of the rectangular cavity (12), the shaft sleeve (5) cannot leave the rectangular cavity (12) and is limited in the rectangular cavity (12), and the distribution box door cannot be opened after the disconnecting switch (1) is closed; Only when the disconnecting switch (1) is rotated to the open position, the rectangular short side of the shaft sleeve (5) faces the cavity opening (14), because the length of the rectangular short side of the shaft sleeve (5) is slightly smaller than the width of the cavity opening (14) of the rectangular cavity (12), the shaft sleeve (5) can leave the rectangular cavity (12), and the distribution box door can be opened after the disconnecting switch (1) is opened.

2. The interlocking method of a visual break point load disconnector according to claim 1, characterized in that: The groove (7) is a frame structure, which includes a groove bottom frame and a groove opening frame, and the groove opening frame protrudes two groove sides, which are matched with two pressing arms (11) on the door pressing plate (6) respectively; the pin (10) is fixed on the groove bottom frame.

3. The interlocking method of a visual break point load disconnector according to claim 2, characterized in that: The number of the pin (10) is two, which are both fixed on the groove bottom frame.

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