Electrical lock for electrical maintenance

Abstract

The utility model relates to an electrical lock for electrical maintenance, and belongs to the technical field of electrical equipment. Comprising a mounting plate, the mounting plate is located between two groups of circuit breakers which are horizontally mounted, the two groups of circuit breakers are rotatably connected with a handle rotating seat, and the upper side surface of the handle rotating seat is fixedly connected with a handle switch. According to the utility model, when the handle switch of one group of circuit breakers is toggled to be closed, the side bevel gear connected with the handle switch on the same side is driven to rotate, and at the moment, the side bevel gear on the other side rotates in the opposite direction after being driven by the main bevel gear, so that the handle switch of the other group of circuit breakers is driven to move in the opposite direction; and disconnection of the group of circuit breakers is realized. The rotating track of the rotating disc is consistent with the rotating track of the handle rotating seat driven by the handle switch, so that when the handle switch drives the buckle to move, the buckle and the handle switch are always in a relatively attached static state, and the situation of slipping is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to an electrical interlock for electrical maintenance. Background Art

[0002] The basic principle of the electrical interlock is to achieve interlocking protection between devices through a mechanical lock or electronic control. When performing maintenance on distribution facilities such as distribution boxes and distribution cabinets, in order to achieve interlocking protection and prevent electrical equipment from being misoperated during maintenance, it is necessary to ensure that two circuit breakers cannot operate in parallel, thereby preventing maintenance personnel from being exposed to electric shock or other dangers. Therefore, an electrical interlock is required to control the two circuit breakers from operating simultaneously.

[0003] After retrieval, in an electrical interlock for electrical maintenance provided by the utility model with the patent number CN213151462U, when the handle switch of the left circuit breaker is toggled upward, since the movable slide rod is sleeved outside the handle switch through a circular hole, at this time, the left handle switch will drive the left movable slide rod to move upward. Through the cooperation of two sets of racks and a set of gears, at this time, the right movable slide rod will drive the handle switch inside its circular hole to move downward, so as to achieve the purpose that when driving the handle switch of one set of circuit breakers to move, the handle switch of the other set of circuit breakers will move in the opposite direction, making the two circuit breakers always maintain opposite states, greatly reducing the possibility of misoperation and being convenient and safe to operate.

[0004] However, when the handle switch of the circuit breaker drives the movable slide rod to move, since the handle switch rotates in a circular motion around the rotation center of the circuit breaker, and the movable slide rod moves vertically along the second chute, in this structure, when the handle switch moves, it will slide relative to the circular hole. If the handle switch is too short or the contact between the circular hole and the handle switch is not firm, the handle switch may slip off the circular hole during the movement, resulting in the failure of the interlock. Summary of the Utility Model

[0005] To solve the above technical problems, the utility model provides an electrical interlock for electrical maintenance. The technical solution of the utility model is as follows:

[0006] An electrical interlock for electrical maintenance includes a mounting plate, which is located between two horizontally installed circuit breakers. A handle rotating seat is rotatably connected to each of the two circuit breakers. A handle switch is fixedly connected to the upper side surface of the handle rotating seat. A square frame with adjustable height is movably connected above the mounting plate. A main bevel gear is rotatably connected to the inner top end of the square frame. Side bevel gears are meshed with both sides of the lower surface of the main bevel gear. Through holes are respectively formed through the left and right side walls of the square frame. A connecting shaft is fixedly connected to the center position of the side bevel gear away from the main bevel gear. The connecting shaft is rotatably connected inside the through hole. The axial center point of the connecting shaft and the axial center point of the handle rotating seat are on the same straight line. A rotating disk is fixedly connected to the end of the connecting shaft away from the side bevel gear. A connecting rod is detachably connected to the upper end of the rotating disk. A connecting seat is fixedly connected to the upper surface of the connecting rod. A hollow fixed rod is fixedly connected to one side of the connecting seat. An extension rod is slidably connected inside the end of the fixed rod away from the connecting seat. A loop is fixedly connected to the end of the extension rod away from the fixed rod. The loop is movably sleeved outside the handle switch. The end of the extension rod away from the loop is connected to the fixed rod through an elastic connecting piece.

[0007] Optionally, mounting holes are respectively formed on the front and rear sides of the upper surface of the mounting plate. Fixed ears are fixedly connected to the front and rear sides of the lower surface of the square frame. A connecting bolt is movably connected inside the fixed ear. The lower end of the connecting bolt penetrates through the fixed ear and extends into the mounting hole. The connecting bolt is threadedly connected with the mounting hole.

[0008] Optionally, two groups of guide rails are fixedly connected to the left and right sides of the upper surface of the mounting plate. Two groups of guide blocks are fixedly connected to the left and right sides of the square frame. The guide blocks are slidably connected inside the corresponding guide rails.

[0009] Optionally, a slot is formed on the upper surface of the rotating disk. A plug is fixedly connected to the lower surface of the connecting rod. The plug is inserted into the slot and fixed through a fixing piece.

[0010] Optionally, the fixing piece includes a fixing bolt. A fixing hole is formed through the side of the slot away from the connecting shaft. A connecting hole is formed at the lower end of the plug. The end of the fixing bolt penetrates through the fixing hole and extends into the connecting hole. The fixing bolt is threadedly connected with the connecting hole.

[0011] Optionally, the elastic connecting piece is a spring. One end of the spring is fixedly connected to the end of the extension rod away from the loop. The other end of the spring is fixedly connected to the inside of the fixed rod and close to the connecting seat.

[0012] Optionally, a threaded hole is penetrated and opened on the upper surface of the fixed rod and near one end of the extension rod. A locking bolt is threadedly connected inside the threaded hole. The locking bolt penetrates through the threaded hole and abuts against the upper surface of the extension rod.

[0013] All of the above optional technical solutions can be combined arbitrarily. The present utility model does not elaborate on the structures after combination one by one.

[0014] By means of the above solution, the beneficial effects of the present utility model are as follows:

[0015] 1. In the present utility model, two sets of side bevel gears are meshed and driven through the main bevel gear. Each set of side bevel gears is indirectly connected to the handle switch through the rotating disc. When the handle switch of one set of circuit breakers is toggled to be closed, it will drive the side bevel gear on the same side connected thereto to rotate. At this time, after being driven by the main bevel gear, the side bevel gear on the other side will rotate in the opposite direction, thereby driving the handle switch of the other set of circuit breakers to move in the opposite direction, realizing the disconnection of this set of circuit breakers. This mechanical structure is simple and effective, which can ensure the interlocking function of the handle switches of two circuit breakers in the electrical interlocking system, reduce the risk of misoperation, and provide additional safety guarantees in the maintenance and operation of electrical equipment.

[0016] 2. The side bevel gear drives the rotating disc to rotate synchronously through the connecting shaft. The axial center point of the connecting shaft and the axial center point of the handle rotating seat are located on the same straight line. At this time, the rotation trajectory of the rotating disc is consistent with the rotation trajectory of the handle switch driving the handle rotating seat, ensuring that when the handle switch operates, the rotating disc can accurately follow the movement of the handle switch. This will make it so that when the handle switch drives the buckle to move, the buckle will always be in a relatively stationary state in contact with the handle switch, avoiding the occurrence of slipping, ensuring the stability and reliability during the operation process, preventing the occurrence of slipping due to the relative sliding between the handle switch and the buckle, and thus avoiding the failure of the interlock or misoperation.

[0017] The above description is only an overview of the technical solution of the present utility model. In order to be able to more clearly understand the technical means of the present utility model and implement it according to the content of the description, the following takes the preferred embodiment of the present utility model and combines with the attached drawings to elaborate in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall external structure of the electrical interlock for electrical maintenance provided by the present utility model;

[0019] Figure 2 is a top view of the electrical interlock for electrical maintenance provided by the present utility model;

[0020] Figure 3 is a front view of the electrical interlock for electrical maintenance provided by the present utility model;

[0021] Figure 4 Schematic diagram of the decomposition structure of the electrical interlock for electrical maintenance provided by the present utility model;

[0022] Figure 5 Schematic diagram of the structure in which the side bevel gear, rotating disk, connecting rod, fixed rod, extension rod and loop buckle cooperate in the present utility model.

[0023] Reference numerals in the figure: 1, circuit breaker; 11, handle rotating seat; 12, handle switch; 2, mounting plate; 21, mounting hole; 22, guide rail; 23, connecting bolt; 3, square frame; 31, fixed ear; 32, through hole; 33, guiding block; 4, main bevel gear; 5, side bevel gear; 51, connecting shaft; 6, rotating disk; 61, slot; 62, fixing hole; 7, connecting rod; 71, connecting seat; 72, insertion block; 721, connecting hole; 73, fixing bolt; 8, fixed rod; 81, threaded hole; 9, extension rod; 91, locking bolt; 92, spring; 10, loop buckle. Specific embodiments

[0024] The following combines the drawings and embodiments to further describe in detail the specific embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0025] Embodiment 1: Please refer to Figures 1-5 , the present utility model provides an electrical interlock for electrical maintenance, including a mounting plate 2, the mounting plate 2 is located between two horizontally installed circuit breakers 1, two handle rotating seats 11 are rotatably connected to the two circuit breakers 1, the upper side surface of the handle rotating seat 11 is fixedly connected with a handle switch 12, a square frame 3 with adjustable height is movably connected above the mounting plate 2, a main bevel gear 4 is rotatably connected to the inner top end of the square frame 3, both sides of the lower surface of the main bevel gear 4 are engaged with side bevel gears 5, through holes 32 are respectively formed through the left and right side walls of the square frame 3, a connecting shaft 51 is fixedly connected to the center position of the side bevel gear 5 away from the main bevel gear 4, the connecting shaft 51 is rotatably connected inside the through hole 32, the axial center point of the connecting shaft 51 and the axial center point of the handle rotating seat 11 are located on the same straight line, a rotating disk 6 is fixedly connected to the end of the connecting shaft 51 away from the side bevel gear 5, a connecting rod 7 is detachably connected to the upper end of the rotating disk 6, a connecting seat 71 is fixedly connected to the upper surface of the connecting rod 7, a hollow fixed rod 8 is fixedly connected to one side of the connecting seat 71, an extension rod 9 is slidably connected inside the end of the fixed rod 8 away from the connecting seat 71, a loop buckle 10 is fixedly connected to the end of the extension rod 9 away from the fixed rod 8, the loop buckle 10 is movably sleeved outside the handle switch 12, and the end of the extension rod 9 away from the loop buckle 10 is connected to the fixed rod 8 through an elastic connecting member.

[0026] In the present utility model, when the handle switch 12 of the left circuit breaker 1 is driven to move backward, it will drive the loop buckle 10, the extension rod 9, the fixed rod 8 and the connecting rod 7 on the left side to move together, thereby driving the synchronous rotation of the rotary disk 6 on the left side. At the same time, the left rotary disk 6 drives the side bevel gear 5 on the left side to rotate through the connecting shaft 51. After being driven by the main bevel gear 4, the side bevel gear 5 on the right side will rotate in the opposite direction to the side bevel gear 5 on the left side. At this time, the handle switch 12 of the right circuit breaker 1 will move forward. In this way, when a group of circuit breakers 1 is driven to close, the other group of circuit breakers 1 can be synchronously disconnected. And during the interlocking braking process, the loop buckle 10 will always be in a relatively stationary state in contact with the handle switch 12, which can prevent the occurrence of slipping.

[0027] Among them, the axial center point of the connecting shaft 51 and the axial center point of the handle rotating seat 11 are located on the same straight line. The purpose of this is to ensure that the rotation trajectory of the connecting shaft 51 is consistent with the rotation trajectory of the handle switch 12 driving the handle rotating seat 11. This can ensure that when the handle switch 12 of one group of circuit breakers 1 is driven to move backward, the handle switch 12 of the other group of circuit breakers 1 can move forward synchronously, avoiding out-of-sync situations.

[0028] Furthermore, mounting holes 21 are provided on both the front and rear sides of the upper surface of the mounting plate 2. Fixed ears 31 are fixedly connected to both the front and rear sides of the lower surface of the square frame 3. A connecting bolt 23 is movably connected inside the fixed ear 31. The lower end of the connecting bolt 23 penetrates through the fixed ear 31 and extends into the inside of the mounting hole 21. The connecting bolt 23 is threadedly connected with the mounting hole 21.

[0029] The square frame 3 is fixed on the mounting plate 2 through the connecting bolt 23, which is convenient for subsequent disassembly, installation and maintenance.

[0030] Furthermore, two groups of guide rails 22 are fixedly connected to both the left and right sides of the upper surface of the mounting plate 2. Two groups of guide blocks 33 are fixedly connected to both the left and right sides of the square frame 3. The guide blocks 33 are slidably connected inside the guide rails 22 at corresponding positions.

[0031] When installing the square frame 3 on the mounting plate 2, it is only necessary to align the guide blocks 33 on both sides of the square frame 3 with the guide rails 22 and insert them to complete the positioning, and the operation is simple and convenient.

[0032] Furthermore, a slot 61 is provided on the upper surface of the rotary disk 6. A plug 72 is fixedly connected to the lower surface of the connecting rod 7. The plug 72 is inserted into the inside of the slot 61 and fixed by a fixing member.

[0033] A detachable structure is adopted between the connecting rod 7 and the rotating disc 6, which enables the quick installation of the electrical interlock device. During installation, first, the loop 10 is sleeved outside the handle switch 12, then the insertion block 72 on the lower surface of the connecting rod 7 is inserted into the corresponding slot 61 inside, and finally, it can be fixed through the fixing member. The operation is simple and convenient. Moreover, the installation process can be completed during the normal operation of the circuit breaker 1 without the need to stop the machine or interrupt the operation of the circuit breaker 1.

[0034] Furthermore, the fixing member includes a fixing bolt 73. A fixing hole 62 is penetrated and opened on one side of the slot 61 away from the connecting shaft 51. A connecting hole 721 is opened at the lower end of the insertion block 72. The end of the fixing bolt 73 penetrates through the fixing hole 62 and extends into the inside of the connecting hole 721. The fixing bolt 73 is threadedly connected with the connecting hole 721.

[0035] When the insertion block 72 is completely inserted into the slot 61, at this time, the connecting hole 721 is aligned with the fixing hole 62. Just screw the fixing bolt 73 into the fixing hole 62 and the connecting hole 721, then the fixing between the insertion block 72 and the rotating disc 6 can be completed, ensuring that when the connecting rod 7 moves, it can synchronously drive the rotating disc 6 to rotate.

[0036] Furthermore, the elastic connecting member is a spring 92. One end of the spring 92 is fixedly connected to the end of the extension rod 9 away from the loop 10, and the other end of the spring 92 is fixedly connected to the inside of the fixing rod 8 and near the connecting seat 71.

[0037] When the distance between two sets of circuit breakers 1 is different, the length of the extension rod 9 extending out of the fixing rod 8 can be adjusted. The extension rod 9 and the fixing rod 8 are connected by the spring 92. When the loop 10 connected to the extension rod 9 is sleeved outside the handle switch 12, the spring 92 will exert an elastic force to elastically fix the relative positions of the extension rod 9 and the fixing rod 8.

[0038] Embodiment 2: Please refer to Figures 1-5 , on the basis of Embodiment 1, as another implementation manner of the present utility model, a threaded hole 81 is penetrated and opened on the upper surface of the fixing rod 8 and near one end of the extension rod 9. A locking bolt 91 is threadedly connected inside the threaded hole 81. The locking bolt 91 penetrates through the threaded hole 81 and abuts against the upper surface of the extension rod 9.

[0039] The structure involved in this embodiment can be used together with the spring 92 in Embodiment 1, or can be used alone. When used alone, only need to tighten the locking bolt 91 to abut against the upper surface of the extension rod 9, then the length of the extension rod 9 extending out of the fixing rod 8 can be fixed. When used together with the spring 92, if the electrical interlock needs to be installed between two sets of circuit breakers 1 for a long time, at this time, on the basis of the elastic fixation of the spring 92, the locking bolt 91 can be used for secondary fixation to ensure the stability during long-term use.

[0040] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. An electrical interlock for electrical maintenance, characterized in that: It includes a mounting plate (2), the mounting plate (2) is located between two horizontally installed circuit breakers (1), handle rotating seats (11) are rotatably connected to both of the two circuit breakers (1), a handle switch (12) is fixedly connected to the upper side surface of the handle rotating seat (11), a square frame (3) with adjustable height is movably connected above the mounting plate (2), a main bevel gear (4) is rotatably connected to the inner top end of the square frame (3), side bevel gears (5) are engaged with both sides of the lower surface of the main bevel gear (4), through holes (32) are respectively formed through the left and right side walls of the square frame (3), a connecting shaft (51) is fixedly connected to the central position on the side of the side bevel gear (5) away from the main bevel gear (4), the connecting shaft (51) is rotatably connected inside the through hole (32), the axial center point of the connecting shaft (51) and the axial center point of the handle rotating seat (11) are located on the same straight line, a rotating disk (6) is fixedly connected to the end of the connecting shaft (51) away from the side bevel gear (5), a connecting rod (7) is detachably connected to the upper end of the rotating disk (6), a connecting seat (71) is fixedly connected to the upper surface of the connecting rod (7), a hollow fixed rod (8) is fixedly connected to one side of the connecting seat (71), an extension rod (9) is slidably connected inside the end of the fixed rod (8) away from the connecting seat (71), a loop (10) is fixedly connected to the end of the extension rod (9) away from the fixed rod (8), the loop (10) is movably sleeved outside the handle switch (12), and the end of the extension rod (9) away from the loop (10) is connected to the fixed rod (8) through an elastic connecting piece.

2. An electrical interlock for electrical maintenance according to claim 1, characterized in that, Mounting holes (21) are respectively formed in the front and rear sides of the upper surface of the mounting plate (2), fixing ears (31) are fixedly connected to the front and rear sides of the lower surface of the square frame (3), a connecting bolt (23) is movably connected inside the fixing ear (31), the lower end of the connecting bolt (23) penetrates through the fixing ear (31) and extends into the mounting hole (21), and the connecting bolt (23) is in threaded connection with the mounting hole (21).

3. An electrical interlock for electrical maintenance according to claim 1 or 2, characterized in that, Two groups of guide rails (22) are fixedly connected to the left and right sides of the upper surface of the mounting plate (2), two groups of guide blocks (33) are fixedly connected to the left and right sides of the square frame (3), and the guide blocks (33) are slidably connected inside the guide rails (22) at corresponding positions.

4. An electrical interlock for electrical maintenance according to claim 1, characterized in that, A slot (61) is formed in the upper surface of the rotating disk (6), a plug (72) is fixedly connected to the lower surface of the connecting rod (7), and the plug (72) is inserted into the slot (61) and fixed through a fixing piece.

5. An electrical interlock for electrical maintenance according to claim 4, characterized in that, The fixing piece includes a fixing bolt (73), a fixing hole (62) is formed through the side of the slot (61) away from the connecting shaft (51), a connecting hole (721) is formed at the lower end of the plug (72), the end of the fixing bolt (73) penetrates through the fixing hole (62) and extends into the connecting hole (721), and the fixing bolt (73) is in threaded connection with the connecting hole (721).

6. An electrical interlock for electrical maintenance according to claim 1, characterized in that, The elastic connecting member is a spring (92), one end of the spring (92) is fixedly connected to the end of the extension rod (9) away from the loop (10), and the other end of the spring (92) is fixedly connected to the inside of the fixed rod (8) and near the end of the connecting seat (71).

7. An electrical interlock for electrical maintenance according to claim 1 or 6, characterized in that, A threaded hole (81) is formed through the upper surface of the fixed rod (8) near the end of the extension rod (9), a locking bolt (91) is threadedly connected inside the threaded hole (81), and the locking bolt (91) passes through the threaded hole (81) and abuts against the upper surface of the extension rod (9).

Images