Thin operating mechanism for environmentally friendly gas insulated ring main unit circuit breaker

Abstract

The application provides a thin operating mechanism for an environmentally friendly gas insulated ring main unit circuit breaker, and relates to the technical field of power system power transmission and distribution equipment. The top end of the rear partition plate is provided with an output transmission shaft, the surface of the output transmission shaft is provided with two output crank arms, one side between the two output crank arms is provided with a first roller and a second roller, the other side between the two output crank arms is provided with a four-bar linkage mechanism, and the bottom end of the front partition plate is provided with a buffer sensing linkage mechanism for achieving buffer and accurate positioning of the first roller. The buffer sensing linkage mechanism buffers the first roller, effectively solves the problem of multiple bounces of the contact at the moment of closing, determines the accurate signal of the closing in place through the position sensor, completely avoids the false signal caused by the failure of the transmission mechanism, and uses the closing cam + four-bar linkage mechanism as the closing transmission mechanism to relieve the impact on each component and improve the service life.

Description

Technical Field

[0001] This invention relates to the field of power system transmission and distribution equipment technology, and in particular to a thin operating mechanism for an environmentally friendly gas-insulated ring main unit circuit breaker. Background Technology

[0002] Environmentally friendly gas-insulated ring main units (RMS) are core equipment for the green upgrading of medium-voltage power distribution networks. They use dry air or environmentally friendly insulating gas instead of traditional SF6, which places higher performance requirements on the operating mechanism of the built-in circuit breaker. Currently, the external dimensions and installation dimensions of RMS switchgear of the same type vary among different manufacturers (mainly in the depth direction), resulting in poor interchangeability. In order to meet the universal interchangeability of equipment from different manufacturers within a certain range and period and to improve the convenience of RMS operation and maintenance, standardization requirements have been put forward for RMS products. As urban power distribution equipment evolves towards miniaturization and compactness, the internal space of the RMS gas box is extremely limited, forcing the operating mechanism to develop towards a "thin" design.

[0003] However, position detection in traditional thin mechanisms often relies on mechanical microswitches to be directly triggered by pressure. But the release of spring energy will cause a huge impact and vibration, resulting in a high false alarm rate under the violent vibration of opening and closing. In addition, there is a lack of detection of the closed position. If the transmission rod breaks or is loosely connected, the back-end will receive a false "closed in place" signal, but in fact the circuit breaker has not closed, or although the switch has been activated, the mechanical indicator is stuck, causing the indicator to display an incorrect state. Summary of the Invention

[0004] The problems to be solved by this invention are: false alarms caused by vibrations generated at the moment of spring release; and false signals caused by malfunctions of traditional transmission mechanisms.

[0005] To solve the above-mentioned technical problems, the present invention provides a thin operating mechanism for an environmentally friendly gas-insulated ring main unit circuit breaker, including a front partition and a rear partition. An output drive shaft is provided on one side of the top of the rear partition. Two output cranks are provided on the surface of the output drive shaft. A first roller and a second roller are provided on one side between the two output cranks. A four-bar linkage mechanism is provided on the other side between the two output cranks. A buffer sensing linkage mechanism for buffering and precise positioning of the first roller is installed on one side of the bottom of the front partition. The buffer sensing linkage mechanism includes an irregularly shaped guide groove base fixedly connected to the bottom end of the front partition. The inner cavity of the irregularly shaped guide groove base is provided with an irregularly shaped limiting guide groove. A floating push block is movably connected to one side of the inner cavity of the irregularly shaped guide groove base. One end of the floating push block is fixedly connected to a contact block and a reset spring. A position sensor for detecting the displacement of the first roller is provided inside the irregularly shaped guide groove base.

[0006] Preferably, the inner wall of the irregularly shaped limiting guide groove is arc-shaped, the cross-section of the irregularly shaped limiting guide groove is trapezoidal, and the opening size gradually decreases from the inlet to the end point. The first roller is movably connected to the inner cavity of the irregularly shaped limiting guide groove.

[0007] Preferably, a motor is installed on the rear partition, and an energy storage component is fixedly connected to the output end of the motor. The energy storage component includes a small gear fixedly connected to the output end of the motor, a large gear meshing with the surface of the small gear, a transmission wheel provided in the inner cavity of the large gear and connected by a ratchet, an energy storage crankshaft fixedly connected to the top end of the transmission wheel, a brake cam fixedly connected to the top end of the energy storage crankshaft, the position of the brake cam corresponding to the position of the first roller and their surfaces in contact, and an energy storage spring connected to the surface of the energy storage crankshaft by a mounting plate.

[0008] Preferably, the end of the pawl away from the transmission wheel is engaged with a closing half-shaft, and the lower part of the surface of the closing half-shaft is sequentially connected with a first closing / opening rotating plate from top to bottom. The bottom end of the front partition is equipped with a first closing / opening electromagnet for pushing the first closing / opening rotating plate.

[0009] Preferably, the four-bar linkage includes two links rotatably connected between two output crank arms. The ends of the two links away from the output crank arms are rotatably connected to a triangular crank arm. An auxiliary switch plate is rotatably connected to one side of the top of the triangular crank arm. An auxiliary switch crank arm is rotatably connected to the end of the auxiliary switch plate away from the triangular crank arm.

[0010] Preferably, an output shaft is inserted in the middle of the triangular crank arm, and a transmission crank arm and a limiting crank arm are sequentially connected to the lower surface of the output shaft. An interlocking device is connected to the upper surface of the output shaft via a bearing, and a stop spring is connected to the end of the limiting crank arm away from the output shaft via a hanging plate.

[0011] Preferably, a tripping half-shaft and a latching plate shaft are installed on the top of the rear partition near the output drive shaft. A limit rod is provided between the tripping half-shaft and the latching plate shaft. Two second closing / opening rotating plates are fixedly connected to the surface of the tripping half-shaft. A latching plate is connected to the surface of the latching plate shaft. One end of the latching plate is connected to a lever. The lever corresponds to the position of the second roller and is in contact with its surface. A second closing / opening electromagnet for pushing the second closing / opening rotating plates is installed at the bottom of the front partition.

[0012] Preferably, the interlocking device includes an interlocking plate connected to the upper surface of the output shaft, an interlocking connecting plate rotatably connected to one end of the interlocking plate, an interlocking cam rotatably connected to the end of the interlocking connecting plate away from the interlocking plate, an interlocking baffle movably connected to the front partition by a rivet pin, the interlocking cam rotatably connected to the front partition by a rivet pin and in contact with one end of the interlocking baffle, and a tension spring is also provided between the interlocking baffle and the front partition.

[0013] The technical effects and advantages of this invention are as follows: 1. This invention uses a specially shaped limiting guide groove to buffer the first roller. When the first roller moves within the cavity of the specially shaped limiting guide groove, its speed automatically adjusts according to the opening size of the groove. Moving within the wedge-shaped damping zone of the groove generates a small hysteresis displacement, thus achieving a buffering effect. This transforms the traditional rigid collision into a flexible collision, significantly reducing the reverse impact force on the tripping shaft, improving the service life of the main shaft bearing, and effectively solving the problem of multiple bounces of the contacts during closing, leading to contact erosion. It also reduces the impact force generated by the release of energy from the energy storage spring, which could cause the first roller to bounce and result in false signal alarms.

[0014] 2. This invention utilizes a position sensor linked to the irregularly shaped limiting guide groove to detect the displacement of the first roller in real time. When the first roller moves to the end point of the inner cavity of the irregularly shaped limiting guide groove, it first impacts the floating push block along the arc surface of its inner wall. After the floating push block is impacted, its rear contact block moves backward to trigger the position sensor, preventing the first roller from directly contacting the position sensor and being directly shattered and damaged by the impact force at the moment of closing. When the displacement of the first roller reaches a preset distance, the position sensor is triggered, and the final "closing in place" signal is output. This prevents false closing in place signals from being issued due to breakage of traditional mechanical indicators or jamming of the first roller due to connection issues or signal mistransmission, and completely avoids false signals caused by transmission mechanism failures.

[0015] 3. This invention uses a closing cam + four-bar linkage as the closing transmission mechanism. By reasonably matching the spring output force characteristics and the switch load characteristics, an ideal closing speed is obtained, reducing the closing power of the mechanism, alleviating the impact on each component, and improving service life. Furthermore, the operating mechanism and its components are concentrated on the front and rear partitions, and multiple fixing rods are set between the front and rear partitions to form a whole, which is installed as a module on the switch cabinet. At the same time, the layout of each mechanism is rearranged, which greatly reduces the overall depth dimension of the mechanism. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2This is a schematic diagram of the overall internal structure of the present invention.

[0018] Figure 3 This is a schematic diagram of the buffer sensing linkage mechanism of the present invention.

[0019] Figure 4 This is a schematic diagram of the overall internal structure of the present invention from another perspective.

[0020] Figure 5 For the present invention Figure 4 Enlarged schematic diagram of the structure at point A in the middle.

[0021] Figure 6 This is a schematic diagram of the four-bar linkage and energy storage component structure of the present invention.

[0022] Figure 7 This is a schematic diagram of the interlocking device structure of the present invention. The attached figures are labeled as follows: 1. Front partition; 2. Rear partition; 3. Output drive shaft; 4. Output crank arm; 5. First roller; 6. Second roller; 7. Four-bar linkage; 71. Linkage; 72. Triangular crank arm; 73. Auxiliary switch connecting plate; 74. Auxiliary switch crank arm; 8. Buffer sensing linkage mechanism; 81. Irregularly shaped guide groove base; 82. Irregularly shaped limiting guide groove; 83. Floating push block; 84. Contact block; 85. Return spring; 9. Energy storage component; 91. Small gear; 92. Large gear; 9 3. Drive wheel; 94. Energy storage crankshaft; 95. Closing cam; 96. Energy storage spring; 10. Closing half-shaft; 11. First closing / opening turntable; 12. Output shaft; 13. Drive crank arm; 14. Limiting crank arm; 15. Interlocking device; 151. Interlocking plate; 152. Interlocking connecting plate; 153. Interlocking cam; 154. Interlocking baffle; 16. Opening spring; 17. Opening half-shaft; 18. Buckle plate shaft; 19. Limit rod; 20. Second closing / opening turntable; 21. Buckle plate; 22. Activator. Detailed Implementation

[0023] This invention provides a thin operating mechanism for an environmentally friendly gas-insulated ring main unit circuit breaker, such as... Figure 1-7 As shown, the device includes a front partition 1 and a rear partition 2. An output drive shaft 3 is provided on one side of the top of the rear partition 2. Two output crank arms 4 are provided on the surface of the output drive shaft 3. A first roller 5 and a second roller 6 are provided on one side between the two output crank arms 4. A four-bar linkage 7 is provided on the other side between the two output crank arms 4. A buffer sensing linkage mechanism 8 for buffering and precise positioning of the first roller 5 is installed on one side of the bottom of the front partition 1. The operating mechanism assembles the components on the front partition 1 and the rear partition 2. Furthermore, multiple fixing rods are provided between the front partition 1 and the rear partition 2 to form a whole. The mechanism is installed as a module on the switch cabinet, and the layout of each mechanism is rearranged, which greatly reduces the overall depth dimension of the mechanism.

[0024] Furthermore, such as Figure 2 and Figure 3 As shown, the buffer sensing linkage mechanism 8 includes an irregularly shaped guide groove base 81 fixedly connected to the bottom end of the front partition 1. An irregularly shaped limiting guide groove 82 is opened in the inner cavity of the irregularly shaped guide groove base 81. A floating push block 83 is movably connected to one side of the inner cavity of the irregularly shaped guide groove base 81. A contact block 84 and a reset spring 85 are fixedly connected to one end of the floating push block 83. A position sensor for detecting the displacement of the first roller 5 is provided inside the irregularly shaped guide groove base 81.

[0025] Furthermore, such as Figure 2 - Figure 5 As shown, the inner wall of the irregularly shaped limiting guide groove 82 is arc-shaped, and the cross-section of the irregularly shaped limiting guide groove 82 is trapezoidal, with the opening size gradually decreasing from the entrance to the end point. The first roller 5 is movably connected to the inner cavity of the irregularly shaped limiting guide groove 82. When the first roller 5 moves within the inner cavity of the irregularly shaped limiting guide groove 82, its speed automatically adjusts according to the opening size of the irregularly shaped limiting guide groove 82. In the initial closing phase, when the first roller 5 approaches the wider entrance of the irregularly shaped limiting guide groove 82, it is allowed to slide quickly. When it is about 20 degrees before the dead point and the closing position is reached, the width of the irregularly shaped limiting guide groove 82 contracts, forming a wedge-shaped damping zone. When the first roller 5 moves within the wedge-shaped damping zone, it will generate a small hysteresis displacement, converting a large amount of kinetic energy into friction. The frictional heat is instantly dissipated, thus providing a buffering effect. When the first roller 5 moves to the end of the inner cavity of the irregularly shaped limiting guide groove 82, it first impacts the floating push block 83 along the arc surface of its inner wall. After the floating push block 83 is impacted, the contact block 84 at its rear end will move backward to trigger the position sensor, preventing the first roller 5 from directly contacting the position sensor and being directly shattered and damaged by the impact force at the moment of closing. At the same time, the reset spring 85 is compressed, and the floating push block 83 is reset after the closing is completed. When the displacement of the first roller 5 reaches the preset distance, the position sensor is triggered, and the final "closing in place" signal is output, preventing the traditional mechanical indicator from breaking or the first roller 5 from jamming due to connection or signal mistransmission, which would result in a false closing in place signal.

[0026] Furthermore, such as Figure 2 and Figure 6As shown, a motor is installed on the rear partition 2. An energy storage component 9 is fixedly connected to the output end of the motor. The energy storage component 9 includes a small gear 91 fixedly connected to the output end of the motor. A large gear 92 is meshed with the surface of the small gear 91. A transmission wheel 93 is provided in the inner cavity of the large gear 92 and is connected by a pawl. An energy storage crankshaft 94 is fixedly connected to the top of the transmission wheel 93. A brake cam 95 is fixedly connected to the top of the energy storage crankshaft 94. The position of the brake cam 95 corresponds to the position of the first roller 5 and their surfaces are in contact. An energy storage spring 96 is connected to the surface of the energy storage crankshaft 94 through a hanging plate. When performing the energy storage action, the operating handle is inserted into the output end of the motor or the motor is started directly. The output end of the motor drives the small gear 91 to rotate and drives its surface to mesh with the large gear 92. The large gear 92, which is connected to the gear, rotates. At the same time, the large gear 92 drives the transmission wheel 93 via the pawl, which in turn drives the energy storage crankshaft 94 to rotate. There are two spring fixing rods installed on the rear partition 2. The end of the energy storage spring 96 away from the energy storage crankshaft 94 is connected to one of the spring fixing rods via a hanging plate. Therefore, when the energy storage crankshaft 94 rotates, it will pull the energy storage spring 96 away, and at the same time drive the closing cam 95 to rotate and press against the surface of the first roller 5, so that it is buffered and positioned by the buffer sensing linkage mechanism 8. At the same time, an energy storage indicator is installed on the top of the energy storage crankshaft 94. When the energy storage component 9 is in the accurate position, the buffer sensing linkage mechanism 8 sends an accurate signal, and the energy storage indicator can clearly indicate the energy storage status of the mechanism.

[0027] Furthermore, such as Figure 2 and Figure 6 As shown, the end of the pawl away from the transmission wheel 93 is engaged with the closing half-shaft 10. The lower part of the surface of the closing half-shaft 10 is connected to the first closing / opening rotating plate 11 from top to bottom. The bottom end of the front partition 1 is equipped with a first closing / opening electromagnet for pushing the first closing / opening rotating plate 11. A slot is provided at the corresponding position of the closing half-shaft 10 and the pawl. The pawl is engaged with the closing half-shaft 10 through the slot, so that it stops and stays at this position to complete the energy storage action. The closing action must be performed in the opening energy storage state. A closing knob is installed at the top of the closing half-shaft 10. When operating, rotating the closing knob causes the closing half-shaft 10 to rotate, releasing the engagement with the pawl. The energy storage spring 96 then releases energy, driving the closing cam 95 to rotate in the opposite direction. The first closing / opening electromagnet can be used instead of manually rotating the closing knob to start the first closing / opening electromagnet. Its extended end pushes the first closing / opening rotating plate 11, driving the closing half-shaft 10 to rotate in the opposite direction.

[0028] Furthermore, such as Figure 6 and Figure 7As shown, the four-bar linkage 7 includes two links 71 rotatably connected between two output crank arms 4. The ends of the two links 71 away from the output crank arms 4 are rotatably connected to a triangular crank arm 72. An auxiliary switch connecting plate 73 is rotatably connected to one side of the top of the triangular crank arm 72. An auxiliary switch crank arm 74 is rotatably connected to the end of the auxiliary switch connecting plate 73 away from the triangular crank arm 72.

[0029] Furthermore, such as Figure 6 and Figure 7 As shown, an output shaft 12 is inserted into the middle of the triangular crank arm 72. A transmission crank arm 13 and a limiting crank arm 14 are sequentially connected to the lower surface of the output shaft 12. An interlocking device 15 is connected to the upper surface of the output shaft 12 via a bearing. A stop spring 16 is connected to the end of the limiting crank arm 14 away from the output shaft 12 via a hanging plate. When the output crank arm 4 rotates, it transmits the rotation to the output shaft 12 through the four-bar linkage 7. The end of the stop spring 16 away from the limiting crank arm 14 is fixed to another spring fixing rod by a scraper. The closing cam 95 continues to rotate until its contour surface slides out of the first roller 5. The closing force generated by the energy storage spring 96 is removed. At this time, the torque generated by the opening spring 16 and the reaction force of the circuit breaker contact spring on the output shaft 12 causes the output shaft 12 to rotate counterclockwise. This torque is transmitted to the output crank arm 4 via the four-bar linkage 7. An opening / closing indicator is installed at the top of the output shaft 12 to display the opening / closing status. The closing cam 95 and the four-bar linkage 7 are used as the closing transmission mechanism. By reasonably matching the spring output force characteristics and the switch load characteristics, an ideal closing speed is obtained, reducing the closing power of the mechanism, mitigating the impact on various components, and improving service life.

[0030] Furthermore, such as Figure 7As shown, a tripping half-shaft 17 and a latching plate shaft 18 are installed on the top of the rear partition 2 near the output drive shaft 3. A limit rod 19 is provided between the tripping half-shaft 17 and the latching plate shaft 18. Two second closing / opening rotating plates 20 are fixedly connected to the surface of the tripping half-shaft 17. A latching plate 21 is connected to the surface of the latching plate shaft 18. One end of the latching plate 21 is connected to a lever 22. The lever 22 corresponds to the position of the second roller 6 and is in contact with its surface. A second closing / opening electromagnet for pushing the second closing / opening rotating plates 20 is installed at the bottom of the front partition 1. The tripping half-shaft 17 has a groove for engaging with the latching plate 21. The four-bar linkage 7 transmits the rotation of the output shaft 12 to the output crank arm 4. The second roller 6 on the output crank arm 4 presses against the lever 22, and the lever 22 pushes the latching plate 21 to rotate. The latch plate 21 is fastened to the trip half shaft 17 and is restricted from rotating by the trip half shaft 17, thus completing the closing action. At this time, the mechanism is in the closed, unenergized state. The top of the trip half shaft 17 is equipped with a trip knob. When performing the trip action, rotating the trip knob causes the trip half shaft 17 to rotate, releasing the latch between it and the latch plate 21. The latch plate 21 and the lever 22 rotate in opposite directions together. The lever 22 releases the constraint on the second roller 6 on the output crank arm 4. The output shaft 12 is then restricted to the trip position by the limit rod 19, thus completing the trip. At the same time, the second closing and trip electromagnet can replace manual operation. After the second closing and trip electromagnet is started, its output end pushes the second closing and trip rotating plate 20, causing the trip half shaft 17 to rotate in the opposite direction and releasing the latch between it and the latch plate 21.

[0031] Furthermore, such as Figure 7 As shown, the interlocking device 15 includes an interlocking piece 151 connected to the upper surface of the output shaft 12. One end of the interlocking piece 151 is rotatably connected to an interlocking plate 152, and the end of the interlocking plate 152 away from the interlocking piece 151 is rotatably connected to an interlocking cam 153. An interlocking baffle 154 is movably connected to the front partition 1 by a rivet pin. The interlocking cam 153 is rotatably connected to the front partition 1 by a rivet pin and contacts one end of the interlocking baffle 154. A tension spring is also provided between the interlocking baffle 154 and the front partition 1. When the mechanism performs a circuit breaker opening operation, the output shaft 12 drives the interlocking device 15 to rotate together and stop in the unlocked state. Conversely, when the mechanism performs a circuit breaker closing operation, the output shaft 12 drives the interlocking device 15 to rotate in the opposite direction and stop in the locked state.

[0032] Working principle of the invention: Energy storage action: At this time, the mechanism is in the non-energy storage state; insert the operating handle directly into the motor output end, or start the motor directly instead of manual operation. The motor output end rotates clockwise, driving the small gear 91 to drive the large gear 92 meshing with it to rotate. At the same time, the large gear 92 drives the transmission wheel 93 through the pawl to drive the energy storage crankshaft 94 to rotate. When the energy storage crankshaft 94 rotates, it will pull the energy storage spring 96 open. After the energy storage spring 96 passes the dead point, the torque generated by the energy storage spring 96 on the crankshaft will cause the energy storage crankshaft 94 to continue to rotate counterclockwise, driving the transmission wheel 93 to rotate with the pawl until the pawl engages with the slot cavity on the closing half shaft 10 and is restricted by the closing half shaft 10, stopping and holding in this position. Remove the operating handle or stop the motor. The energy storage action is completed. At this time, the mechanism is in the energy storage state, and the energy storage status of the mechanism is clearly indicated by the energy storage indicator. Closing action: At this time, the mechanism is in the open energy storage state; rotating the closing knob causes the closing half-shaft 10 to rotate, or activating the first closing / opening electromagnet, which pushes the first closing / opening rotating plate 11 through its extended end, replacing manual operation. The closing half-shaft 10 rotates, releasing the pawl, and the energy storage spring 96 releases energy, causing the closing cam 95 to rotate counterclockwise. At this time, the contour surface of the closing cam 95 presses against the first roller 5 on the output crank arm 4, causing the output crank arm 4 to rotate clockwise around the output transmission shaft 3. At this time, the opening spring 16 is pulled open. After the first roller 5 is pressed and moved, it first passes through the buffer sensing linkage mechanism 8. In the initial closing phase, when the first roller 5 approaches the wider part of the entrance of the irregularly shaped limiting guide groove 82, the first roller 5 is allowed to slide quickly. When it is about 20 degrees before the dead point of closing, the width of the irregularly shaped limiting guide groove 82 narrows, forming a wedge-shaped damping zone. When the first roller 5 moves in the wedge-shaped damping zone, it will produce a small hysteresis displacement, which will convert the huge kinetic energy into frictional heat energy and dissipate it instantly, thus achieving a buffering effect. When the first roller 5 moves into the irregularly shaped limiting guide groove 82... When the first roller 5 reaches the end of the cavity, it first impacts the floating push block 83 along the arc surface of its inner wall. After the impact, the contact block 84 at the rear end of the floating push block 83 moves backward to trigger the position sensor, preventing the first roller 5 from directly contacting the position sensor and being directly shattered by the impact force at the moment of closing. At the same time, the return spring 85 is compressed, and the floating push block 83 returns to its original position after closing. When the displacement of the first roller 5 reaches the preset distance, the position sensor is triggered, and the final "closing in place" signal is output. After the position is determined, it is then transmitted to the four-bar linkage 7. When the output shaft 12 rotates synchronously, after the closing cam 95 slides out of the first roller 5, the closing force generated by the energy storage spring 96 is removed. At this time, the torque generated by the force of the opening spring 16 and the reaction force of the circuit breaker contact spring on the output shaft 12 causes it to rotate counterclockwise. This torque is transmitted to the output crank arm 4 through the four-bar linkage 7. The second roller 6 on the output crank arm 4 presses against the spring 22. The spring 22 pushes the buckle plate 21 to rotate. The buckle plate 21 is fastened to the opening half shaft 17 and is restricted to stop rotating by the opening half shaft 17, thus completing the closing action. At this time, the mechanism is in the closing and non-energy-storing state. Opening action: At this time, the mechanism is in the closed energy storage state; rotate the opening knob to make the opening half shaft 17 rotate, or activate the second opening electromagnet, and push the second opening rotating plate 20 through the extended end of the second opening electromagnet to replace manual operation, so that the opening half shaft 17 rotates, and the buckle between it and the buckle plate 21 is released. The buckle plate 21 and the lever 22 rotate counterclockwise together. The lever 22 releases the constraint on the second roller 6 on the output crank arm 4. The output shaft 12 rotates counterclockwise under the action of the opening spring 16 and the circuit breaker contact spring. The limit rod 19 limits the output shaft 12 of the mechanism to stop at the opening position. The opening action is completed. At this time, the mechanism is in the opening state. Interlocking Action: When the mechanism is in the closed state, the interlocking device 15 is in the locked state (restricting the isolation operation of the isolation mechanism); when the mechanism performs an opening operation, the output shaft 12 of the mechanism rotates counterclockwise, and the interlocking plate 151 rotates synchronously with it. Through the interlocking connecting plate 152, it drives the interlocking cam 153 to rotate counterclockwise. The interlocking cam 153 releases the pressure on the interlocking baffle 154, and the interlocking baffle 154 moves upward under the action of the tension spring and stops in the unlocked state; conversely, when the mechanism is in the open state, the interlocking device 15 is in the unlocked state (releasing the isolation operation of the isolation mechanism); when the mechanism performs a closing operation, the output shaft 12 of the mechanism rotates clockwise, and the interlocking plate 151 rotates synchronously with it. Through the interlocking connecting plate 152, it drives the interlocking cam 153 to rotate clockwise, and the interlocking cam 153 presses the interlocking baffle 154 downward and stops in the locked state; Close-and-go operation: During energy storage operation, the large gear 92 rotates counterclockwise. When the notch of the large gear 92 rotates to a certain position, the tail of the pawl will enter the notch of the large gear 92 under the pressure of the compression spring, so that the large gear 92 meshes with the transmission wheel 93, driving the transmission wheel 93 to rotate together. When the energy storage is complete, the upper part of the pawl is locked on the closing half shaft 10 and is restricted. The tail of the pawl lifts up and disengages from the notch of the large gear 92, so that the large gear 92 disengages from the transmission wheel 93 and no longer drives the transmission wheel 93 to rotate. In the energy storage state, even if the large gear 92 continues to rotate, it will not damage the half shaft, pawl, gear, motor and other related parts. The energy storage operation is safe and reliable.

[0033] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A thin operating mechanism for an environmentally friendly gas-insulated ring main unit circuit breaker, comprising a front partition (1) and a rear partition (2), characterized in that: An output drive shaft (3) is provided on one side of the top of the rear partition (2). Two output cranks (4) are provided on the surface of the output drive shaft (3). A first roller (5) and a second roller (6) are provided on one side between the two output cranks (4). A four-bar linkage (7) is provided on the other side between the two output cranks (4). A buffer sensing linkage mechanism (8) for buffering and precise positioning of the first roller (5) is installed on one side of the bottom of the front partition (1). The buffer sensing linkage mechanism (8) includes an irregularly shaped guide groove base (81) fixedly connected to the bottom of the front partition (1). The inner cavity of the irregularly shaped guide groove base (81) is provided with an irregularly shaped limiting guide groove (82). A floating push block (83) is movably connected to one side of the inner cavity of the irregularly shaped guide groove base (81). One end of the floating push block (83) is fixedly connected to a contact block (84) and a reset spring (85). The interior of the irregularly shaped guide groove base (81) is provided with a position sensor for detecting the displacement of the first roller (5).

2. The thin operating mechanism for an environmentally friendly gas-insulated ring main unit circuit breaker according to claim 1, characterized in that: The inner wall of the irregularly shaped limiting guide groove (82) is set to arc shape, the cross-section of the irregularly shaped limiting guide groove (82) is set to trapezoidal shape, and the opening size gradually decreases from the entrance to the end point. The first roller (5) is movably connected to the inner cavity of the irregularly shaped limiting guide groove (82).

3. The thin operating mechanism for an environmentally friendly gas-insulated ring main unit circuit breaker according to claim 1, characterized in that: A motor is installed on the rear partition (2), and an energy storage component (9) is fixedly connected to the output end of the motor. The energy storage component (9) includes a small gear (91) fixedly connected to the output end of the motor. A large gear (92) is meshed with the surface of the small gear (91). A transmission wheel (93) is provided in the inner cavity of the large gear (92) and is connected by a pawl. An energy storage crankshaft (94) is fixedly connected to the top of the transmission wheel (93). A brake cam (95) is fixedly connected to the top of the energy storage crankshaft (94). The position of the brake cam (95) corresponds to the position of the first roller (5) and their surfaces are in contact. An energy storage spring (96) is connected to the surface of the energy storage crankshaft (94) through a hanging plate.

4. The thin operating mechanism for an environmentally friendly gas-insulated ring main unit circuit breaker according to claim 3, characterized in that: The end of the pawl away from the transmission wheel (93) is engaged with a closing half shaft (10). The lower part of the surface of the closing half shaft (10) is connected to a first closing / opening rotating plate (11) from top to bottom. The bottom end of the front partition (1) is equipped with a first closing / opening electromagnet for pushing the first closing / opening rotating plate (11).

5. The thin operating mechanism for an environmentally friendly gas-insulated ring main unit circuit breaker according to claim 1, characterized in that: The four-bar linkage (7) includes two links (71) rotatably connected between two output crank arms (4). The ends of the two links (71) away from the output crank arms (4) are rotatably connected to a triangular crank arm (72). An auxiliary switch plate (73) is rotatably connected to one side of the top of the triangular crank arm (72). An auxiliary switch crank arm (74) is rotatably connected to the end of the auxiliary switch plate (73) away from the triangular crank arm (72).

6. The thin operating mechanism for an environmentally friendly gas-insulated ring main unit circuit breaker according to claim 5, characterized in that: An output shaft (12) is inserted in the middle of the triangular crank arm (72). A transmission crank arm (13) and a limiting crank arm (14) are connected in sequence to the lower part of the surface of the output shaft (12). An interlocking device (15) is connected to the upper part of the surface of the output shaft (12) through a bearing. A stop spring (16) is connected to the end of the limiting crank arm (14) away from the output shaft (12) through a hanging plate.

7. The thin operating mechanism for an environmentally friendly gas-insulated ring main unit circuit breaker according to claim 1, characterized in that: The top of the rear partition (2) is equipped with a tripping half shaft (17) and a snap plate shaft (18) near the output drive shaft (3). A limit rod (19) is provided between the tripping half shaft (17) and the snap plate shaft (18). Two second closing and opening rotating plates (20) are fixedly connected to the surface of the tripping half shaft (17). A snap plate (21) is connected to the surface of the snap plate shaft (18). One end of the snap plate (21) is connected to a lever (22). The lever (22) corresponds to the position of the second roller (6) and is in contact with its surface. The bottom of the front partition (1) is equipped with a second closing and opening electromagnet for pushing the second closing and opening rotating plates (20).

8. The thin operating mechanism for an environmentally friendly gas-insulated ring main unit circuit breaker according to claim 6, characterized in that: The interlocking device (15) includes an interlocking piece (151) connected to the upper part of the surface of the output shaft (12). One end of the interlocking piece (151) is rotatably connected to an interlocking plate (152). The end of the interlocking plate (152) away from the interlocking piece (151) is rotatably connected to an interlocking cam (153). An interlocking baffle (154) is movably connected to the front partition (1) by a rivet pin. The interlocking cam (153) is rotatably connected to the front partition (1) by a rivet pin and is in contact with one end of the interlocking baffle (154). A tension spring is also provided between the interlocking baffle (154) and the front partition (1).

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