Direct-current isolating switch

Abstract

The utility model discloses a direct-current isolating switch which comprises a mounting frame, two insulators are arranged on the upper end face of the mounting frame, the upper ends of the two insulators are connected with a first wiring board and a second wiring board respectively, a first connecting plate is arranged on the first wiring board, and a second connecting plate is arranged on the second wiring board. One end of the spindle is rotatably connected with the mounting rack through a bearing, the other end of the spindle is in transmission connection with the output end of the motor, the side wall of the spindle is fixedly connected with one end of the guide rod, the other end of the guide rod is rotatably connected with one end of the insulating pull rod, the other end of the insulating pull rod is rotatably connected with a knife body of the knife, and one end of the knife is rotatably connected with the first connecting plate; the motor drives the main shaft to rotate, the main shaft rotates to drive the guide rod to deflect so as to drive the insulating pull rod, the insulating pull rod pushes and pulls the knife switch to enable the first connecting plate and the second connecting plate to be connected or disconnected through the knife switch, the motor drives the main shaft to rotate to prevent the long pull rod from occupying the equipment volume, and the requirement for miniaturization of disconnecting switch products can be met.

Description

Technical Field

[0001] The utility model belongs to the technical field of switch operating mechanisms of power supply lines, and in particular relates to a DC isolating switch. Background Art

[0002] DC isolating switches are supporting products in new energy power supply systems such as urban rail transit, photovoltaics, and wind power. In particular, DC isolating switches are responsible for the normal power supply during the operation of subways and light rail locomotives and the isolation of power outages in the event of faults. They are important equipment to ensure the normal operation of subways and light rails.

[0003] In existing DC disconnectors, opening or closing is achieved by manually pulling a pull rod to rotate the main shaft, thereby driving the disconnector to open or close, thereby connecting or disconnecting the disconnector. In actual use, to ensure personnel safety, the pull rod is designed to be long, resulting in a larger overall design size of the disconnector, which is not suitable for the demand for miniaturization of disconnector products. Utility Model Content

[0004] This application proposes a DC isolating switch to meet the demand for miniaturization of isolating switch products. Miniaturization can make DC isolating switch products easier to integrate into other equipment or systems, which is beneficial to improving the overall performance and flexibility of the power system.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A DC isolating switch includes a mounting frame, wherein two insulators are provided on the upper end surface of the mounting frame, and the upper ends of the two insulators are respectively connected to a first terminal block and a second terminal block, the first terminal block is provided with a first connecting plate, and the second terminal block is provided with a second connecting plate, and a main shaft is provided in the middle of the mounting frame, one end of the main shaft is rotatably connected to the mounting frame through a bearing, and the other end of the main shaft is transmission-connected to the output end of the motor, the side wall of the main shaft is fixedly connected to one end of the guide rod, the other end of the guide rod is rotatably connected to one end of the insulating pull rod, the other end of the insulating pull rod is rotatably connected to the knife body of the switch, and one end of the switch is rotatably connected to the first connecting plate.

[0007] In one embodiment of the present application, the motor is connected to the main shaft through a reducer.

[0008] In one embodiment of the present application, the outer cover of the motor is provided with a protective shell.

[0009] In one embodiment of the present application, the rod body of the insulating pull rod is die-cast with an umbrella skirt.

[0010] In one embodiment of the present application, a rotation angle sensor is provided on the side of the mounting frame, the input end of the rotation angle sensor is connected to a rotating handle, the side of the rotating handle is rotatably connected to one end of the connecting rod, the side of the connecting rod is rotatably connected to the side of the sleeve, and the sleeve is clamped on the outer side of the main shaft.

[0011] In one embodiment of the present application, a ferrule is provided at one end of the main shaft, protrusions are provided on both sides of the ferrule, a limit switch is provided below the ferrule, and a first touch point and a second touch point are provided on the upper part of the limit switch.

[0012] In one embodiment of the present application, a limiting block is connected to the side surface of the main shaft, and limiting nuts are provided on both sides of the main shaft.

[0013] In summary, the technical solution proposed in this application includes the following beneficial technical effects: the main shaft is driven to rotate by the motor, the rotation of the main shaft drives the guide rod to deflect and then drives the insulating pull rod, the insulating pull rod pushes and pulls the switch knife to connect or disconnect the first connecting plate and the second connecting plate through the switch knife, so as to realize the connection or disconnection of the disconnector. Compared with opening or closing the switch by pushing the long pull rod, the main shaft is driven to rotate by the motor to avoid the long pull rod occupying the equipment volume, which is beneficial to adapting to the demand for miniaturization of disconnector products. In addition, compared with manual control of pulling the pull rod to open and close the switch, the safety and response speed of the operation are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0015] Figure 1 A schematic diagram of the three-dimensional structure of a DC isolating switch provided in one embodiment of the present application;

[0016] Figure 2 A bottom-up structural diagram of a DC isolating switch provided in one embodiment of the present application;

[0017] Figure 3 A schematic diagram of the three-dimensional structure of a DC isolating switch provided in one embodiment of the present application;

[0018] Figure 4 A schematic diagram of the three-dimensional structure of a DC isolating switch provided in one embodiment of the present application;

[0019] Figure 5 A schematic diagram of the three-dimensional structure of a DC isolating switch provided in one embodiment of the present application;

[0020] Figure 6 A schematic diagram of the three-dimensional structure of a DC isolating switch provided in one embodiment of the present application;

[0021] In the figure: mounting frame-1, insulator-11;

[0022] First terminal block-2, first connection plate-21;

[0023] Second terminal block-3, second connection plate-31;

[0024] Spindle 4, bearing 41, guide rod 42, insulating pull rod 43, shed 431, ferrule 44, bump 441, limit switch 45, first contact point 451, second contact point 452, limit block 46, limit nut 47;

[0025] Motor-5, reducer-51, protective shell-52;

[0026] Blade-6, rotating shaft-61;

[0027] Rotation angle sensor-7, handle-71, connecting rod-72, jacket-73. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application are clearly and completely described below. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts also fall within the scope of protection of this application.

[0029] It should be noted that in the description of this application, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0030] The terms "mounted," "connected," and "connected" in this application should be interpreted broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical connections; direct connections or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0031] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0032] This embodiment provides a DC isolating switch, see Figures 1-6 As shown, it includes a mounting frame 1, and two insulators 11 are provided on the upper end surface of the mounting frame 1. The upper ends of the two insulators 11 are respectively connected to a first terminal block 2 and a second terminal block 3, the first terminal block 2 is provided with a first connecting plate 21, and the second terminal block 3 is provided with a second connecting plate 31. A main shaft 4 is provided in the middle of the mounting frame 1, one end of the main shaft 4 is rotatably connected to the mounting frame 1 through a bearing 41, and the other end of the main shaft 4 is transmission-connected to the output end of the motor 5, the side wall of the main shaft 4 is fixedly connected to one end of the guide rod 42, the other end of the guide rod 42 is rotatably connected to one end of the insulating pull rod 43, the other end of the insulating pull rod 43 is rotatably connected to the knife body of the knife switch 6, and one end of the knife switch 6 is rotatably connected to the first connecting plate 21.

[0033] In the above embodiment, the first terminal block 2 and the second terminal block 3 are respectively connected to the mounting frame 1 through the insulator 11. The terminal blocks are provided with terminal bolts for connecting the wire lines. The insulator 11 plays an insulating role to prevent the circuit current from being conducted through the mounting frame 1 and leaking out, thereby preventing the dangerous situation of short circuit and leakage. A main shaft 4 is provided in the middle of the mounting frame 1, and one end of the main shaft 4 is rotatably connected to the mounting frame 1 through a bearing 41, and the other end of the main shaft 4 is transmission-connected to the output end of the motor 5. The rotation of the main shaft 4 is controlled by controlling the operation of the motor 5. The preferred motor 5 can be a servo motor 5. The side wall of the main shaft 4 is fixedly connected to one end of the guide rod 42, and the other end of the guide rod 42 is rotatably connected to one end of the insulating pull rod 43. The other end of the insulating pull rod 43 is rotatably connected to the knife body of the knife switch 6, and one end of the knife switch 6 is rotatably connected to the first connecting plate 21. Figure 6 As shown, one end of the knife switch 6 is rotatably connected to the first connecting plate 21 through the rotating shaft 61. The motor 5 drives the main shaft 4 to rotate. The rotation of the main shaft 4 drives the guide rod 42 to deflect and then drives the insulating pull rod 43. The insulating pull rod 43 pushes and pulls the knife switch 6 so that the first connecting plate 21 and the second connecting plate 31 are connected or disconnected through the knife switch 6. Figure 5For example, the motor 5 drives the main shaft 4 to rotate clockwise, driving the connecting end of the guide rod 42 and the insulating rod 43 to move downward, thereby pulling the insulating rod 43 downward and then pulling the connecting end of the insulating rod 43 and the knife 6 downward, so that the knife body of the knife 6 rotates around the first connecting plate 21, thereby making the other end of the knife 6 contact and connect with the second connecting plate 31 to put the isolating switch in the on state. Similarly, the motor 5 drives the main shaft 4 to rotate counterclockwise, driving the connecting end of the guide rod 42 and the insulating rod 43 to move upward, thereby pulling the insulating rod 43 upward and then pushing the connecting end of the insulating rod 43 and the knife 6 upward, so that the knife 6 The body rotates around the first connecting plate 21, thereby moving the other end of the switch blade 6 away from the second connecting plate 31, so that the disconnector is in an off state to connect or disconnect the circuit breaker. By driving the main shaft 4 to rotate by the motor 5, the long pull rod component can be optimized and omitted to avoid the long pull rod occupying the equipment installation volume, which is beneficial to the miniaturization of the disconnector and makes the DC disconnector product easier to integrate into other equipment or systems, which is beneficial to improving the overall performance and flexibility of the power system. In addition, compared with manually controlling the pull rod to open and close the switch, the motor 5 drives the disconnector, which improves the safety and response speed of the operation.

[0034] In one embodiment of the present application, see Figure 2 As shown, the motor 5 is connected to the main shaft 4 through a reducer 51.

[0035] In the above embodiment, the reducer 51 can increase the torque of the motor 5 , thereby increasing the rotational kinetic energy of the main shaft 4 , and further improving the smoothness of the main shaft 4 driving the switch blade 6 to move open and close.

[0036] In one embodiment of the present application, see Figure 1 and Figure 2 As shown, the motor 5 is externally covered with a protective shell 52 .

[0037] In the above embodiment, during the maintenance of the integrated equipment or the operation of the equipment, the motor 5 is susceptible to mechanical collision damage. Setting a protective cover can protect the external structure of the motor 5, prevent the motor 5 from being mechanically damaged, ensure the normal operation of the motor 5, and further ensure the normal operation of the isolating switch.

[0038] In one embodiment of the present application, see Figure 1 As shown, the rod body of the insulating pull rod 43 is die-cast with an umbrella skirt 431.

[0039] In the above embodiment, the insulating rod 43 is provided with an insulating shed 431 on its shaft, which can increase the insulation distance of the insulating rod 43, improve its insulation performance, and increase the creepage distance of the insulating rod 43, thereby improving the safety of the disconnector. The shed 431 is die-cast on the shaft of the insulating rod 43, which can improve the stability of the connection between the shaft of the insulating rod 43 and the shed 431, prevent the shed 431 from separating from the shaft, and is beneficial to improving the insulation stability of the insulating rod 43. Preferably, the shaft of the insulating rod 43 is made of epoxy glass fiber, and the shed 431 is made of polyester thermosetting plastic and is die-cast on the shaft of the insulating rod 43 using thermosetting plastic molding equipment.

[0040] In one embodiment of the present application, see Figure 3 As shown, a rotation angle sensor 7 is provided on the side of the mounting frame 1, and the input end of the rotation angle sensor 7 is connected to a rotating handle 71. The side of the rotating handle 71 is rotatably connected to one end of a connecting rod 72, and the side of the connecting rod 72 is rotatably connected to the side of a sleeve 73. The sleeve 73 is clamped on the outer side of the main shaft 4.

[0041] In the above embodiment, when the main shaft 4 rotates, the jacket 73 is driven to deflect, and then the jacket 73 drives the connecting rod 72 to move, and the connecting rod 72 drives the handle 71 to rotate, and the handle 71 drives the input end of the angle sensor 7 to deflect, and then the rotation state of the main shaft 4 is recorded and monitored by the angle sensor 7, which is beneficial to real-time monitoring of the state of the isolation switch and facilitates the detection of circuit faults.

[0042] In one embodiment of the present application, see Figure 5 As shown, a clamping sleeve 44 is provided at one end of the main shaft 4, protrusions 441 are provided on both sides of the clamping sleeve 44, a limit switch 45 is provided below the clamping sleeve 44, and a first touch point 451 and a second touch point 452 are provided on the upper part of the limit switch 45.

[0043] In the above embodiment, when the main shaft 4 rotates, it drives the ferrule 44 to rotate. When the ferrule 44 deflects to a certain extent, the protrusions 441 on both sides of the ferrule 44 will touch the first contact and the second contact of the limit switch 45. The limit switch 45 is electrically connected to the motor 5. When the protrusion 441 touches the contact, the limit switch 45 controls the motor 5 to stop running, so as to limit the rotation angle of the main shaft 4 driven by the motor 5, and prevent the main shaft 4 from rotating at too large an angle, driving the knife 6 to excessively deflect, resulting in abnormal opening and closing of the isolating switch.

[0044] In one embodiment of the present application, see Figure 4 As shown, the side of the main shaft 4 is connected to a limiting block 46 , and both sides of the main shaft 4 are provided with limiting nuts 47 .

[0045] In the above embodiment, the limit nuts 47 on both sides of the main shaft 4 are used to limit the rotation range of the main shaft 4. After the limit block 46 rotates and contacts the limit nut 47, the main shaft 4 can no longer rotate, thereby preventing the rotating shaft from driving the insulating pull rod 43 to rotate too much and causing the switch knife 6 to deviate from the movement, which is beneficial to improving the stability of the disconnector when opening and closing. In addition, the rotation range of the main shaft 4 can be adjusted by adjusting the exposed height of the limit nut 47, which is convenient for maintenance personnel to adjust the limit angle of the main shaft 4 according to actual conditions.

[0046] During the actual use of this application: the first terminal block 2 and the second terminal block 3 are respectively connected to the mounting frame 1 through the insulator 11. The insulator 11 plays an insulating role to prevent the circuit current from being conducted and leaking through the mounting frame 1. One end of the main shaft 4 is rotatably connected to the mounting frame 1 through the bearing 41. The other end of the main shaft 4 is transmission-connected to the output end of the motor 5. The rotation of the main shaft 4 is controlled by controlling the operation of the motor 5. The side wall of the main shaft 4 is fixedly connected to one end of the guide rod 42. The other end of the guide rod 42 is rotatably connected to one end of the insulating pull rod 43. The other end of the insulating pull rod 43 is rotatably connected to the knife body of the knife switch 6. One end of the knife switch 6 is rotatably connected to the first connecting plate 21, and the motor 5 drives the main shaft 4 to rotate. The rotation of the main shaft 4 drives the guide rod 42 to deflect and then drives the insulating pull rod 43. The insulating pull rod 43 pushes and pulls the knife switch 6 to connect or disconnect the first connecting plate 21 and the second connecting plate 31 through the knife switch 6. By driving the main shaft 4 to rotate by the motor 5, the long pull rod component can be optimized and omitted to avoid the long pull rod occupying the equipment installation volume, which is beneficial to the miniaturization of the disconnector, making it easier to integrate the DC disconnector product into other equipment or systems, and is beneficial to improving the overall performance and flexibility of the power system.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A DC isolating switch, characterized in that: The invention comprises a mounting frame (1), wherein two insulators (11) are provided on the upper end surface of the mounting frame, and the upper ends of the two insulators (11) are respectively connected to a first terminal block (2) and a second terminal block (3), wherein a first connecting plate (21) is provided on the first terminal block (2), and a second connecting plate (31) is provided on the second terminal block (3), and a main shaft (4) is provided in the middle of the mounting frame (1), wherein one end of the main shaft (4) is rotatably connected to the mounting frame (1) through a bearing (41), and the other end of the main shaft (4) is transmission-connected to the output end of the motor (5), and the side wall of the main shaft (4) is connected to the guide rod ( 42), one end of the guide rod (42) is fixedly connected, the other end of the guide rod (42) is rotatably connected to one end of the insulating pull rod (43), the other end of the insulating pull rod (43) is rotatably connected to the knife body of the knife switch (6), one end of the knife switch (6) is rotatably connected to the first connecting plate (21), a rotation angle sensor (7) is provided on the side of the mounting frame (1), the input end of the rotation angle sensor (7) is connected to a handle (71), the side of the handle (71) is rotatably connected to one end of the connecting rod (72), the side of the connecting rod (72) is rotatably connected to the side of the sleeve (73), and the sleeve (73) is clamped on the outer side of the main shaft (4).

2. The DC isolating switch according to claim 1, characterized in that: The motor (5) is connected to the main shaft (4) via a speed reducer (51).

3. The DC isolating switch according to claim 2, characterized in that: The outer cover of the motor (5) is provided with a protective shell (52).

4. The DC isolating switch according to claim 1, characterized in that: The rod body of the insulating pull rod (43) is die-cast to have an umbrella skirt (431).

5. The DC isolating switch according to claim 1, characterized in that: A clamping sleeve (44) is provided at one end of the main shaft (4), protrusions (441) are provided on both sides of the clamping sleeve (44), a limit switch (45) is provided below the clamping sleeve (44), and a first contact point (451) and a second contact point (452) are provided on the upper portion of the limit switch (45).

6. The DC isolating switch according to any one of claims 1 to 4, characterized in that: The side of the main shaft (4) is connected to a limiting block (46), and limiting nuts (47) are provided on both sides of the main shaft (4).

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