A manual closing device for permanent magnet switchgear

Abstract

The present invention discloses a manual closing device for a permanent magnetic switch device, comprising a closing sleeve assembly, a crank arm, and a connecting rod connecting the closing sleeve assembly and the crank arm. The crank arm is fixedly connected to the closing holding half-shaft of the permanent magnetic switch device to drive the closing holding half-shaft to rotate to enable and cancel the closing holding function. The closing sleeve assembly comprises an outer sleeve and a core shaft. The outer sleeve is coaxially connected to the gear shaft of the input gear of the permanent magnetic switch device through a one-way bearing, and can drive the input gear to rotate in one direction to store energy for the energy storage spring. A long hole is provided on the outer sleeve. The core shaft is arranged in the outer sleeve and is rotatably connected to the outer sleeve. A detent is provided on the core shaft, and the detent passes through the outer sleeve from the long hole. One end of the detent is located on the outside of the outer sleeve and is connected to the crank arm through a connecting rod. The use of the present invention can solve the technical problem that the permanent magnetic switch device cannot be closed when the permanent magnetic mechanism is powered off.

Description

Technical Field

[0001] The present invention relates to the technical field of switchgear, in particular to a manual closing device for permanent magnet switchgear. Background Art

[0002] Medium-voltage power distribution systems are equipped with a large number of vacuum circuit breakers, reclosers, and load switches that utilize permanent magnetic mechanisms. These permanent magnetic vacuum switches offer advantages such as fewer operating parts, high reliability, and fast response time. They can perform multiple rapid reclosing operations in a very short period of time and are widely used in distribution networks, especially outdoor distribution networks.

[0003] The permanent magnet mechanism uses capacitors to store energy, which has a short storage time. During the installation, commissioning, and maintenance of permanent magnet switchgear, power outages often occur, preventing the permanent magnet mechanism's capacitors from charging and rendering the permanent magnet switch unable to close. Summary of the Invention

[0004] The object of the present invention is to provide a manual closing device for a permanent magnetic switchgear, which can solve the technical problem that the permanent magnetic switchgear cannot be closed when the permanent magnetic mechanism is powered off.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions.

[0006] A manual closing device for a permanent magnetic switch device comprises a closing shaft sleeve assembly, a crank arm and a connecting rod connecting the closing shaft sleeve assembly and the crank arm.

[0007] The crank arm is used to be fixedly connected to the closing holding half-shaft of the permanent magnetic switch device to drive the closing holding half-shaft to rotate to enable and cancel the closing holding function of the permanent magnetic switch device.

[0008] The closing shaft sleeve assembly includes an outer shaft sleeve and a core shaft. The outer shaft sleeve is used to be coaxially connected to the gear shaft of the input gear of the permanent magnetic switch device through a one-way bearing. It can drive the input gear to rotate in one direction to store energy in the energy storage spring of the permanent magnetic switch device. A long hole extending in the circumferential direction is provided on the outer shaft sleeve.

[0009] The core shaft is arranged in the outer shaft sleeve and is rotatably connected to the outer shaft sleeve. The core shaft is provided with a pin perpendicular to the length direction of the core shaft. The pin passes through the outer shaft sleeve from the long hole. The length of the long hole is greater than the width of the pin.

[0010] The detent pin is located outside the outer sleeve one end It is connected to the free end of the crank arm through a connecting rod, and is used to drive the crank arm through the connecting rod when the core shaft rotates, thereby driving the closing and maintaining half-shaft rotation.

[0011] Furthermore, a frame fixedly connected to the permanent magnetic switch device frame is provided, and a reset mechanism for causing the outer sleeve to reverse and return to its original position after driving the input gear to rotate and a limit mechanism for limiting the rotation range of the outer sleeve are provided between the outer sleeve and the frame.

[0012] The limiting mechanism includes a limiting pin provided on the outer sleeve and a limiting block provided on the frame. The limiting block includes a starting limiting block and an ending limiting block. The limiting pin is located between the starting limiting block and the ending limiting block and is used to limit the rotation range of the outer sleeve.

[0013] The reset mechanism includes a reset lever on the outer sleeve and a reset spring connecting the frame and the reset lever. The rotating core shaft drives the outer sleeve to rotate synchronously to store energy in the energy storage spring, which can stretch the reset spring. Releasing the core shaft reset spring can drive the outer sleeve to rotate in the opposite direction.

[0014] Furthermore, a holding mechanism is provided between the closing holding half-shaft and the frame for keeping the closing holding half-shaft in a position where the closing holding function is enabled.

[0015] The holding mechanism consists of a holding crank arm fixedly connected to the closing holding half-shaft, a sliding rod rotatably connected to the holding crank arm, a holding spring mounted on the sliding rod, and a holding pin mounted on the frame. One end of the sliding rod is rotatably connected to the holding crank arm via a short shaft, while the other end has a guide slot along its length. The holding pin passes through the guide slot and slidably connects to the sliding rod. Rotating the closing holding half-shaft to activate the closing holding function drives the short shaft through the line connecting the closing holding half-shaft and the holding pin.

[0016] The slide bar has a stop at one end near the retaining arm, with a retaining spring positioned between the stop and the retaining pin. The retaining spring is most compressed when the short axis, the closing retaining half-shaft, and the retaining pin are aligned. When the closing retaining half-shaft is rotated to activate the closing retaining function, the retaining spring is compressed and then rebounds, supporting itself between the stop and the retaining pin, keeping the closing retaining half-shaft in the activated closing retaining position.

[0017] Furthermore, the connecting rod is rotatably connected to the detent pin and the crank arm through a hinge.

[0018] Furthermore, the core shaft is also provided with a handle for facilitating manual rotation of the core shaft.

[0019] Furthermore, the handle is detachably fixedly connected to the core shaft.

[0020] After adopting the above technical solution, the present invention has the following beneficial effects:

[0021] 1. The present invention uses a connecting rod to connect the closing shaft sleeve assembly and the closing holding half-shaft, so that the two are linked. The closing holding half-shaft can be operated by a handle to activate the closing holding function and charge the energy storage spring, thereby completing the manual closing operation;

[0022] 2. The closing sleeve assembly innovatively adopts a rotating core shaft and outer sleeve structure. By passing the pin on the core shaft through the long hole on the outer sleeve, the core shaft and outer sleeve can be rotated in steps: the core shaft rotates first to drive the closing holding half shaft to rotate to activate the closing holding function, and then drives the outer sleeve to rotate synchronously to charge the energy storage spring. After closing is completed, pushing the handle back to the initial position cancels the closing holding function. The operation is simple, the closing effect is stable, and there is no possibility of misoperation.

[0023] 3. By setting a reset mechanism and a limit mechanism, when the reciprocating push handle drives the outer sleeve to rotate to charge the energy storage spring, the handle can automatically return to its original position under the action of the reset mechanism each time it is pushed, making it convenient for the next operation;

[0024] 4. By setting a holding mechanism, the closing holding half-shaft can be kept in the position where the closing holding function is enabled, avoiding the accidental operation of rotating the closing holding half-shaft to the cancellation position when the handle is pushed back and forth to charge the energy storage spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0026] Figure 2 yes Figure 1 Enlarged schematic diagram of point A in the middle.

[0027] Figure 3 It is a schematic diagram of the explosion structure of the present invention.

[0028] Figure 4 yes Figure 3 Enlarged schematic diagram of point B in the middle.

[0029] Figure 5 It is a schematic diagram of the exploded structure of the closing shaft sleeve assembly.

[0030] Figure 6 It is a schematic diagram of the positional relationship of the various components of the present invention when the closing holding function is canceled.

[0031] Figure 7 yes Figure 6 Schematic diagram of the three-dimensional structure of the closing shaft sleeve assembly in the shown state.

[0032] Figure 8 It is a schematic diagram of the positional relationship of the various components of the present invention when the closing hold function is enabled.

[0033] Figure 9 It is a schematic diagram of the positional relationship when the core shaft rotates until the push pin contacts the end face of the long hole.

[0034] Figure 10 It is a schematic diagram of the positional relationship of the various components of the present invention when the outer sleeve drives the driving gear to rotate to the extreme position.

[0035] Description of the drawings: 11. Frame, 12. Closing and holding half-shaft, 13. Gear shaft, 14. Energy storage spring, 15. Permanent magnet mechanism, 21. Outer sleeve, 211. Long hole, 22. Core shaft, 221. Push pin, 222. Handle, 23. One-way bearing, 3. Crank arm, 4. Connecting rod, 51. Limit pin, 52. Starting limit block, 53. Ending limit block, 54. Reset lever, 55. Reset spring, 61. Holding crank arm, 611. Short shaft, 62. Slide rod, 621. Guide groove, 622. Block, 63. Holding spring, 64. Holding pin shaft. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the features and performance of a manual closing device for a permanent magnetic switchgear in the present invention are further described in detail below with reference to the accompanying drawings and embodiments.

[0037] See also Figures 1 to 5 A manual closing device for a permanent magnetic switch device includes a frame 11, a closing shaft sleeve assembly, a crank arm 3, and a connecting rod 4 connecting the closing shaft sleeve assembly and the crank arm 3.

[0038] The crank arm 3 is fixedly connected to the closing holding half shaft 12 of the permanent magnetic switch device, and is used to drive the closing holding half shaft 12 to rotate to enable and cancel the closing holding function of the permanent magnetic switch device.

[0039] The closing sleeve assembly includes an outer sleeve 21 and a core shaft 22. The outer sleeve 21 is coaxially connected to the gear shaft 13 of the permanent magnetic switchgear input gear via a one-way bearing 23. This shaft is used to drive the input gear in one direction to store energy in the energy storage spring 14 of the permanent magnetic switchgear. An elongated hole 211 is also defined along the circumference of the outer sleeve 21.

[0040] The core shaft 22 is disposed within the outer sleeve 21 and is coaxially connected to the outer sleeve 21 for rotation. A detent pin 221 is provided on the core shaft 22, extending perpendicularly to the length of the core shaft 22. The detent pin 221 extends through the outer sleeve 21 through an elongated hole 211. Specifically, the length of the elongated hole 211 is greater than the width of the detent pin 221. The core shaft 22 is also provided with a handle 222 for facilitating manual rotation of the core shaft 22. The handle 222 is detachably fixed to the core shaft 22.

[0041] When the core shaft 22 is rotated, the pin 221 moves in the long hole 211 along the length direction of the long hole 211, and the core shaft 22 first rotates relative to the outer sleeve 21. When the core shaft 22 rotates until the pin 221 contacts the end face of the long hole 211, the core shaft 22 drives the outer sleeve 21 to rotate synchronously through the pin 221, and the outer sleeve 21 drives the input gear to rotate to store energy in the energy storage spring 14 of the permanent magnet switch device.

[0042] One end of the detent pin 221, which passes through the elongated hole 211, is connected to the free end of the crank arm 3 via a connecting rod 4. The connecting rod 4 is pivotally connected to the detent pin 221 and the crank arm 3 via a hinge. Rotation of the core shaft 22 drives the crank arm 3 via the connecting rod 4, thereby driving the closing and holding half-shaft 12 to activate and deactivate the closing and holding function.

[0043] Furthermore, the manual closing device also includes a frame 11 fixedly connected to the permanent magnetic switch device frame. In particular, in a specific implementation, the frame of the permanent magnetic switch device can serve as the frame 11, and there is no need to set up an additional independent frame 11.

[0044] A reset mechanism for returning the outer sleeve 21 to its original position after driving the input gear to rotate and a limit mechanism for limiting the rotation range of the outer sleeve 21 are provided between the outer sleeve 21 and the frame 11 of the permanent magnetic switch device.

[0045] The limiting mechanism includes a limiting pin 51 provided on the outer sleeve 21 and a limiting block provided on the frame 11. The limiting block includes a starting limiting block 52 and an ending limiting block 53. The limiting pin 51 is located between the starting limiting block 52 and the ending limiting block 53 and is used to limit the rotation range of the outer sleeve 21.

[0046] The reset mechanism includes a reset lever 54 provided on the outer sleeve 21 and a reset spring 55 connecting the frame 11 and the reset lever.

[0047] When the core shaft 22 drives the outer sleeve 21 to rotate synchronously to store energy for the energy storage spring 14, the reset lever 54 rotates with the outer sleeve 21 to stretch the reset spring 55. After releasing the core shaft 22, the outer sleeve 21 can rotate in the opposite direction under the action of the reset spring 55.

[0048] Furthermore, a holding mechanism for keeping the closing holding half-shaft 12 in a position where the closing holding function is enabled is provided between the closing holding half-shaft 12 and the frame 11 .

[0049] The holding mechanism includes a holding crank arm 61 fixedly connected to the closing holding half-shaft 12, a slide rod 62 rotatably connected to the holding crank arm 61, a holding spring 63 mounted on the slide rod, and a holding pin 64 mounted on the frame 11. One end of the slide rod 52 is rotatably connected to the holding crank arm 61 via a short shaft 611, and the other end is provided with a guide slot 621 along its length. The holding pin 64 slides through the guide slot 621 and is slidably connected to the slide rod 62. Rotating the closing holding half-shaft 12 to activate the operation drives the short shaft 611 through the line connecting the closing holding half-shaft 12 and the holding pin 64.

[0050] The end of the slide bar 62, near the retaining arm 61, has a stopper 622, and a retaining spring 63 is positioned between the stopper 622 and the retaining pin 64. The retaining spring 63 is most compressed when the short shaft 611, the closing retaining half-shaft 12, and the retaining pin 64 are aligned. When the closing retaining half-shaft 12 is rotated for activation, the retaining spring 63 is compressed and then rebounds, supporting itself between the stopper 622 and the retaining pin 64, keeping the closing retaining half-shaft 12 in the activated state.

[0051] To manually operate the permanent magnet switchgear for closing operation, the following steps are required.

[0052] Step 1: Rotate the closing holding half shaft 12 to enable the closing holding function of the permanent magnet switchgear.

[0053] Step 2: Energy is stored in the energy storage spring 14. When the energy storage spring 14 is charged beyond a critical point, the energy storage spring 14 drives the closing operation, and the closing holding function maintains the closing state.

[0054] Step 3: After closing, the permanent magnetic holding force of the permanent magnetic mechanism 15 is the largest and can maintain the closed state. The closing holding half shaft 12 is rotated to cancel the closing holding function, and the manual operation is completed.

[0055] Before executing step one, the permanent magnet switch device is in a power-off state, and the capacitor of the permanent magnet mechanism 15 is depleted and cannot be closed. Manual closing operation is required, and the closing holding function needs to be enabled to keep the closing state until the permanent magnet circuit achieves the maximum closing holding force. The closing holding function can be canceled only after the permanent magnet mechanism 15 can work normally.

[0056] The status of the manual closing device before step 1 operation is as follows Figure 6 As shown, the outer sleeve 21 is pulled by the return spring 55 and rotates clockwise until the limit pin 51 is tightly attached to the starting limit block 52.

[0057] The closing holding half-shaft 12 is in the position of canceling the closing holding function, the short shaft 611 is located on the lower side of the line connecting the closing holding half-shaft 12 and the holding pin shaft 64, and the holding spring 63 acts between the stop block 622 and the holding pin shaft 64. When rotating the closing holding half-shaft 12 clockwise to enable the closing holding function, the holding spring 63 must be compressed first. The holding spring 63 plays the role of keeping the closing holding half-shaft 12 in the position of canceling the closing holding function.

[0058] The detent pin 221 is connected to the crank arm 3 on the closing holding half shaft 12 through the connecting rod 4. When the closing holding half shaft 12 is in the position of canceling the closing holding function, the detent pin 221 is located in the middle of the long hole 211. Figure 7 As shown, Figure 7 for Figure 6 Schematic diagram of the three-dimensional structure of the closing shaft sleeve assembly in the shown state.

[0059] During step 1, operating handle 222 rotates core shaft 22 counterclockwise, causing detent pin 221 to rotate counterclockwise with core shaft 22. This detent pin, through connecting rod 4, drives crank arm 3, causing closing and holding half shaft 12 to rotate counterclockwise until short shaft 611 is above the line connecting closing and holding half shaft 12 and holding pin 64, thereby activating the closing and holding function. Throughout step 1, detent pin 221 moves within slot 211, and outer sleeve 21 does not rotate.

[0060] The closing holding half-shaft 12 rotates counterclockwise to activate the closing holding function. The holding spring 63 needs to be compressed first until the short shaft 611, the closing holding half-shaft 12 and the holding pin 64 are in the same straight line. At this time, the compression of the holding spring 63 reaches the maximum. When the short shaft 611 passes the line connecting the closing holding half-shaft 12 and the holding pin 64 and is above the line, the holding spring 63 rebounds to keep the closing holding half-shaft 12 in the position where the closing holding function is activated.

[0061] After step 1 is completed, the status of the manual closing device is as follows Figure 8 shown.

[0062] After completing step 1, proceed to step 2. The operating handle 222 drives the core shaft 22 to rotate counterclockwise. The pin 221 rotates with the core shaft 22 until it contacts the end face of the long hole 211. Figure 9 As shown, the outer sleeve 21 can rotate synchronously with the core shaft 22 under the push of the pin 221 to overcome the tension of the return spring 55. The operating handle 222 is rotated counterclockwise until the limit pin 51 contacts the end limit block 53, as shown in FIG. Figure 10 Status shown.

[0063] The outer sleeve 21 rotates counterclockwise to drive the input gear of the permanent magnetic switch device to rotate through the one-way bearing 23, storing energy for the energy storage spring 14. When the limit pin 51 rotates to contact the end limit block 53, the handle 222 is released, and the outer sleeve 21 can drive the core shaft 21 to return to the original position under the pull of the reset spring 55. Figure 8 Due to the effect of the one-way bearing 23, the input gear will not rotate when the outer sleeve 21 is reset.

[0064] During the entire step 2, the closing holding half-shaft 12 is within the range of opening the closing protection function, and after the outer sleeve 21 is reset, the holding mechanism can keep the closing holding half-shaft 12 in the position of opening the closing holding function.

[0065] Step 2 needs to repeat the above operation several times until the energy storage spring 14 is charged beyond the critical point and releases energy to perform the closing operation. Since the closing hold function has been enabled, the closing state can be maintained after the energy storage spring 14 performs the closing operation.

[0066] After the permanent magnet mechanism 15 reaches the maximum holding force and has the ability to maintain the closed state after closing, step three is executed to cancel the closing holding function, and only the permanent magnet mechanism 15 is used to maintain the closed state.

[0067] After step 2 is completed and before step 3 is executed, the status of the manual closing device is as follows Figure 8 As shown. When executing step three, the operating handle 222 drives the core shaft 22 to rotate clockwise, and the detent pin 221 rotates clockwise along with the core shaft 22. The detent pin drives the crank arm 3 through the connecting rod 4 to drive the closing holding half shaft 12 to rotate clockwise until the short shaft 611 is located below the line connecting the closing holding half shaft 12 and the holding pin shaft 64, thereby canceling the closing holding function. During the entire step one process, the detent pin 221 moves in the long hole 211, and the outer sleeve 21 does not rotate. After step three is completed, the manual closing device returns to Figure 6 In the status shown, a manual closing operation is completed.

[0068] It should be noted that the above embodiments are only used to illustrate the present invention, but the present invention is not limited to the above embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention fall within the scope of protection of the present invention.

Claims

1. A manual closing device for a permanent magnetic switchgear, characterized in that: It comprises a closing shaft sleeve assembly, a crank arm (3) and a connecting rod (4) connecting the closing shaft sleeve assembly and the crank arm (3). The crank arm (3) is used to be fixedly connected to the closing holding half shaft (12) of the permanent magnetic switch device to drive the closing holding half shaft (12) to rotate to realize the activation and cancellation of the closing holding function of the permanent magnetic switch device. The closing shaft sleeve assembly comprises an outer shaft sleeve (21) and a core shaft (22). The outer shaft sleeve (21) is used to be coaxially connected to the gear shaft (13) of the input gear of the permanent magnetic switch device through a one-way bearing (23), and can drive the input gear to rotate in one direction to store energy in the energy storage spring (14) of the permanent magnetic switch device. The outer shaft sleeve (21) is provided with a long hole (211) extending in the circumferential direction. The core shaft (22) is arranged in the outer sleeve (21) and is rotatably connected to the outer sleeve (21). The core shaft (22) is provided with a detent pin (221) perpendicular to the length direction of the core shaft (22). The detent pin (221) passes through the outer sleeve (21) from the long hole (211). The length of the long hole (211) is greater than the width of the detent pin (221). The pin (221) is located outside the outer sleeve (21) one end The connecting rod (4) is connected to the free end of the crank arm (3) and is used to drive the crank arm (3) through the connecting rod (4) when the core shaft (22) rotates, thereby driving the closing and holding half shaft (12) to rotate.

2. The manual closing device for a permanent magnetic switchgear according to claim 1, characterized in that: A frame (11) fixedly connected to the permanent magnetic switch device frame is also provided, and a reset mechanism for causing the outer shaft sleeve (21) to reverse and return to its original position after driving the input gear to rotate and a limit mechanism for limiting the rotation range of the outer shaft sleeve (21) are provided between the outer shaft sleeve (21) and the frame (11).

3. The manual closing device for a permanent magnetic switchgear according to claim 2, characterized in that: The limiting mechanism includes a limiting pin (51) provided on the outer shaft sleeve (21) and a limiting block provided on the frame (11), the limiting block including a starting limiting block (52) and a terminating limiting block (53), the limiting pin (51) being located between the starting limiting block (52) and the terminating limiting block (53) and being used to limit the rotation range of the outer shaft sleeve (21); The reset mechanism includes a reset lever (54) provided on the outer sleeve (21) and a reset spring (55) connecting the frame (11) and the reset lever (54). The rotating core shaft (22) drives the outer sleeve (21) to rotate synchronously so that the energy storage spring (14) stores energy and can stretch the reset spring (55). When the core shaft (22) is released, the reset spring (55) can drive the outer sleeve (21) to rotate in the opposite direction.

4. The manual closing device for a permanent magnetic switchgear according to claim 3, characterized in that: A holding mechanism for holding the closing holding half-shaft (12) in a position where a closing holding function is enabled is provided between the closing holding half-shaft (12) and the frame (11).

5. The manual closing device for permanent magnetic switchgear according to claim 4, characterized in that: The holding mechanism comprises a holding crank arm (61) fixedly connected to the closing holding half shaft (12), a slide bar (62) rotatably connected to the holding crank arm (61), a holding spring (63) sleeved on the slide bar (62), and a holding pin shaft (64) provided on the frame (11). One end of the slide bar (62) is rotatably connected to the holding crank arm (61) via a short shaft (611), and the other end is provided with a guide groove (621) along the length direction. The holding pin shaft (64) passes through the guide groove (621) and is slidably connected to the slide bar (62). Rotating the closing holding half shaft (12) to enable the closing holding function can drive the short shaft (611) to pass through the closing holding half shaft (1 2) A line connecting the slide bar (62) and the holding pin (64) is provided with a stopper (622) at one end of the slide bar (62) close to the holding arm (61), and a holding spring (63) is provided between the stopper (622) and the holding pin (64). The holding spring (63) has the largest compression when the short shaft (611), the closing holding half shaft (12) and the holding pin (64) are located on the same straight line. When the closing holding half shaft (12) is rotated to enable the closing holding function, the holding spring (63) is compressed and then rebounds, and is supported between the stopper (622) and the holding pin (64) to keep the closing holding half shaft (12) in the position where the closing holding function is enabled.

6. The manual closing device for a permanent magnetic switchgear according to claim 1, characterized in that: The connecting rod (4), the deflector pin (221) and the crank arm (3) are all rotatably connected via a hinge.

7. The manual closing device for a permanent magnetic switchgear according to claim 1, characterized in that: The core shaft (22) is also provided with a handle (222) for facilitating manual rotation of the core shaft (22).

8. The manual closing device for a permanent magnetic switchgear according to claim 7, characterized in that: The handle (222) is detachably fixedly connected to the core shaft (22).

Images