Drop-out fuse executing mechanism for smart power grid

Abstract

The utility model discloses a drop-out fuse actuating mechanism for an intelligent power grid, which relates to the technical field of power distribution equipment and comprises a second connecting seat provided with a second shaft hole or a second rotating shaft. A swing arm is connected to the second connecting seat through a third rotating shaft, and a matching pair serving as a linkage component is arranged at one end of the swing arm; the device further comprises a driver installed on the second connecting base, the driver is provided with a plug pin, the position of the plug pin can be changed under the action of the driver, and the plug pin can block the other end of the swing arm and release the other end of the swing arm on the movement track of the plug pin. According to the scheme, the size of the fuse capable of executing the opening instruction can be effectively reduced, meanwhile, the structure is simple, and an additional insulation mechanism is not needed when the fuse is applied to the fuse.

Description

Technical Field

[0001] This utility model relates to the field of power distribution equipment technology, and in particular to a drop-out fuse actuator for smart grids. Background Technology

[0002] The power grid is a crucial foundational industry for economic and social development and a vital link in the national energy industry chain. To ensure the rapid and sustainable development of my country's energy, economy, and society, it is essential to propose a smart grid development model that aligns with my country's energy strategy and the needs of power grid enterprises. A smart grid refers to the intelligentization of the power grid. It is built upon an integrated, high-speed, two-way communication network and utilizes advanced measurement, monitoring, and control technologies, along with advanced decision support systems, to achieve the goals of reliability, safety, economy, efficiency, environmental friendliness, and operational security.

[0003] Drop-out fuses are the most commonly used short-circuit protection switches for branch lines of power distribution lines and distribution transformers. They are economical, easy to operate, and highly adaptable to outdoor environments. They are widely used in 10kV power distribution lines and the primary side of distribution transformers for protection and equipment switching operations. The structure of a drop-out fuse includes a moving contact, a stationary contact, and a fuse tube. When the drop-out fuse is triggered and blows, the moving contact separates from the stationary contact, and the fuse tube drops and swings, achieving the purpose of quickly cutting off the circuit.

[0004] The common triggering of a drop-out fuse relies on the melting of the fuse element (fuse wire). The action that occurs on the fuse is as follows: after the fuse element melts, the pulling force between the fuse element and the lower support disappears. At this time, the fuse wire flips under its own weight and the action of the upper contact spring, and the lower end of the fuse wire hooks into the groove of the base. If it is necessary to disconnect the fuse without the fuse element melting, personnel generally need to be on site and use the operating rod with hook to pull down the operating ring installed on the upper end of the fuse wire. During this process, the upper end of the fuse wire pushes the contact spring through the contact plate, which further compresses the contact spring. After the contact plate moves up, the upper end of the fuse wire slides out of the groove at the lower end of the contact plate. After sliding out, the fuse wire flips so that the lower end hooks into the groove of the base.

[0005] To achieve remote operation of opening and closing of fuses, the existing technical solutions include those provided in patent documents with application numbers CN200610050361.2, CN202310917008.3, CN202410806378.4, etc. In these solutions, the fuse is equipped with an actuator, and the principle of remote operation is as follows: a motor is used as the power source of the actuator, and the transmission components on the actuator provide pushing and pulling forces to the fuse tube, so as to simulate the method of manually pushing and pulling the fuse tube to obtain the opening and closing action.

[0006] Drop-out fuses are an important component of the power grid. Their good adaptability to remote control can effectively promote the development of smart grid technology. Utility Model Content

[0007] To address the problem of remote control of drop-out fuses, this invention provides a drop-out fuse actuator for smart grids. This solution effectively reduces the size of the fuse capable of executing tripping commands. Furthermore, the solution has a simple structure and does not require additional insulation mechanisms when applied to fuses.

[0008] To address the aforementioned problems, the present invention provides a drop-out fuse actuator for smart grids, which solves the problems through the following technical points: The drop-out fuse actuator for smart grids includes a second connecting seat, on which a second shaft hole or a second rotating shaft is provided;

[0009] A swing arm is connected to the second connecting seat via a third rotating shaft, and one end of the swing arm is provided with a mating pair as a linkage component;

[0010] It also includes a driver mounted on a second connector, the driver being configured with a pin whose position is changeable under the action of the driver, the pin being able to block and release the other end of the swing arm in its movement trajectory.

[0011] Existing drop-out fuses capable of remote tripping, when the actuator performs related actions, require a rigid structure to be formed when the fuse element has not melted. This structure is held between the upper stationary contact and the lower base groove, forming a rigid structure. Before tripping, this structure is elastically held between the base and the contact plates. Therefore, the motor needs to output sufficient torque to force the fuse element to swing and break free from the contact plates' constraint on its upper end. Problems to be solved include the on-site power supply for a high-power motor. Because the actuator is large and needs to be located on the periphery of the fuse as a load-bearing structure, it generally needs to be installed on surrounding electrical equipment. When such installation is not possible on-site, the surrounding electrical equipment needs to be modified, and insulation isolation from surrounding electrical equipment is also an issue. Therefore, this solution aims to provide a technical solution that effectively reduces the size of the fuse capable of executing tripping commands, has a simple structure, and does not require additional insulation mechanisms when applied to fuses.

[0012] Specifically, this actuator is installed on a fuse, serving as a structure that supports the fuse tube on the base before the fusible element melts. The following example uses a drop-out fuse including a base, fuse tube, tube seat, and first connecting seat. The fuse tube is fixedly connected to the tube seat, and the tube seat is rotatably mounted on the first connecting seat via a first rotating shaft. When the fusible element has not melted, it pulls the fuse tube to a fixed position relative to the first connecting seat. This example illustrates the usage and characteristics of this actuator. In application, the second connecting seat forms a rotatable connection with the first connecting seat through the second shaft hole or the second rotating shaft. The dynamic connection relationship (the second shaft hole serves as the shaft hole for setting the second rotating shaft, therefore it is necessary to set a second rotating shaft as the rotating shaft between the first connecting seat and the second connecting seat, which is limited to the second shaft hole being provided on the second connecting seat, that is, the second shaft hole serving as the mounting hole for the second rotating shaft, which is limited to the second connecting seat being provided with the second rotating shaft, that is, the second rotating shaft being directly set on the second connecting seat), one end of the swing arm is engaged with the first connecting seat through a mating pair, the mating pair serving as the linkage component between the first connecting seat and the swing arm, the mating pair being used to achieve: the first connecting seat relative to the second When the connecting seat rotates around the second axis, the first connecting seat swings around the third axis via a cooperating auxiliary drive. Under the action of the driver, the pin can move to the swing trajectory of the swing arm around the third axis. When the pin is in the position blocking the swing arm, the first connecting seat is configured so that the upper end of the fuse tube engages with the upper stationary contact of the drop-out fuse. In this state, under the action of the swing arm, the fuse tube is constrained by the pin as it swings downwards around the second axis with the first connecting seat. The pin's obstruction of the swing arm helps maintain the state of the fuse tube, allowing it to function properly in the power grid. In normal conduction function, when the driver drives the pin under the action of the control command, so that it moves from the first position of blocking the swing arm to the second position of releasing the swing arm, the pin allows the swing arm to swing at a certain angle. Similarly, the swing arm allows the first connecting seat to swing at a certain angle relative to the second connecting seat around the second rotating axis. Under the action of their own weight and / or under the pushing force of the upper stationary contact of the fuse tube on the upper moving contact of the fuse tube, the fuse tube rotates synchronously with the first connecting seat around the second rotating axis, and the fuse tube obtains the drop action.

[0013] In the above applications, the structure formed by the fuse tube, the first connecting seat, and the tube seat is the structure typically included in existing drop-out fuses. Under normal use, the structure is stretched into a tensioned integral structure by the fusible element set between the fuse tube and the first connecting seat. When the fusible element melts, the fuse tube rotates around the first rotating shaft and performs a drop-out action to cut off the circuit. Based on existing technology, the above application connects a second connecting seat to a first connecting seat via a second rotating shaft, and a swing arm is mounted on the second connecting seat via a third rotating shaft. A driver is mounted on the second connecting seat, and a pin is mounted on the driver. The swing arm and the first connecting seat have a mating pair that acts as a linkage component. Thus, the structure formed by the fuse tube, the first connecting seat, and the second connecting seat can be considered a three-bar linkage structure with the first and second rotating shafts. The relative rotation between the fuse tube and the first connecting seat occurs when the fuse melts, and the relative rotation between the first and second connecting seats occurs when the pin allows the swing arm to swing further. In the normal operating state of the drop-out fuse, the second connecting seat is rotatably supported in the groove of the drop-out fuse base. The moving contact of the fuse tube engages with the stationary contact above it. When the driver positions the pin to its first position within its stroke, the pin exerts a linkage on the swing arm. The third rotating shaft's blocking effect prevents the first and second connecting seats from rotating relative to the second rotating shaft under the action of the mating pair. In this state, the pin forces the first and second connecting seats to not rotate relative to each other, and the components of the above three-bar structure cannot swing in a way that would reduce the distance between the upper end of the fuse tube and the second rotating shaft. In this state, the above three-bar mechanism is stably clamped between the groove and the upper stationary contact, providing a structural basis for circuit connection. When the pin moves to the second position of its stroke under the action of the driver, the original blocking effect is eliminated. Under the weight of the fuse tube and the first connecting seat, and the thrust of the stationary contact on the fuse tube, the state of the above three-bar structure is broken. When the upper end of the fuse tube comes out of the groove on the stationary contact, the above three-bar structure swings freely. At this time, the fuse tube undergoes a drop action, and the drop-out fuse is tripped and dropped by the driver.

[0014] In summary, unlike existing technologies, the above application adds a second connector to the existing fuse tube connector (first connector). Whether the first and second connectors can swing depends on the position of the pin in its stroke under the action of the driver. Therefore, when the drop-out fuse needs to execute a control command to disconnect the circuit, it is only necessary to change the position of the pin in its stroke through the driver. Thus, this solution provides a drop-out fuse for smart grids. At the same time, the drop-out fuse can still perform the normal drop-out action of the fuse tube after the fuse element melts through the fusible element connected between the first connector and the fuse tube.

[0015] The above solution differs from existing technologies in that, unlike traditional fuses with actuators, the above solution uses a pin, a swing arm, and a cooperating pair to constrain the first and second connecting seats to a stable state (when the pin is in the first position). After the pin moves (when the pin is in the second position), this stable state is disrupted by its own weight and thrust. After the first and second connecting seats flip so that the fuse tube separates from the groove on the stationary contact (in cases where the structure formed by the first and second connecting seats becomes unstable, and the second connecting seat can be flipped and connected in the groove of the base, it also flips within the groove), the fuse tube freely flips and falls relative to the second connecting seat (for the second connecting seat...). The method of making the connecting seat flip-connected in the groove of the base is accompanied by the second connecting seat flipping and falling around the groove. Therefore, when the above scheme realizes the tripping action of non-fusible fuse, it is not by pushing or pulling the connecting seat to make the upper end of the fuse tube overcome the obstruction of the stationary contact and perform the falling action. The corresponding actuator (including the driver and the pin) is simpler in structure and smaller in size than the existing actuator. The second connecting seat is the connection structure between the base and the first connecting seat. The second connecting seat is the connection structure between the driver and the swing arm. Therefore, it is not necessary to configure the load-bearing structure on the structure other than the movable part of the fuse. The above scheme does not require reconfiguring the installation conditions on site for the load-bearing structure or considering the insulation isolation measures with the surrounding electrical equipment.

[0016] As those skilled in the art, to adapt to the requirements of fuse drop-out, the rotatable engagement between the groove on the base of the drop-out fuse and the second connecting seat can also be achieved by replacing it with a connection between the second connecting seat and the base via a rotating shaft. For example, the second connecting seat is provided with a support shaft for supporting the second connecting seat in the groove of the drop-out fuse base. The axes of the support shaft, the third rotating shaft, the second rotating shaft, and the first rotating shaft are parallel to each other. When the support shaft is supported in the groove of the drop-out fuse base, above the fuse tube... When the moving contact engages with the stationary contact at the top of the drop-out fuse, the pin is in the first position. The engagement between the support shaft and the groove can be achieved by rotatably connecting the support shaft to the shaft hole of the base. When the pin moves to the second position, the swing arm is allowed to rotate around the third pivot. Under the weight and thrust, the first connecting seat and the second connecting seat spontaneously flip relative to each other, and the second connecting seat and the base spontaneously flip relative to each other. This ultimately causes the fuse tube to come out of the stationary contact at the top, and the entire drop-out fuse undergoes a free fall action.

[0017] In practical implementation, since the fuse tube usually needs to be installed at a certain angle to the vertical line of the ground with the upper end facing outward, when the support shaft is regarded as a reference point, the first rotating shaft and the second rotating shaft can be configured to be located on the outside of the support shaft. In order to increase the length of the lever arm between the pin on the swing arm and the third rotating shaft, the engagement position of the swing arm and the pin is located on the inside of the support shaft. Preferably, to improve the fuse tube drop efficiency, the fuse tube swings out rapidly after the fuse element melts. After the pin moves, under the corresponding gravity and thrust, the overall structure formed by the first connecting seat and the fuse tube swings out rapidly. The center of gravity of the structure formed by the fuse tube and the seat is located outside the first rotating shaft, the center of gravity of the structure formed by the fuse tube, the seat, and the first connecting seat is located outside the second rotating shaft, and the center of gravity of the structure formed by the second connecting seat, the swing arm, the pin, the swing arm, and the driver is located outside the support shaft. In this way, the swing direction of the end of the swing arm that cooperates with the pin is in the inward and outward direction. The first position is located outside the second position. Compared with the state where the upper end of the fuse tube is normally engaged with the stationary contact in the first position, when the pin moves to the second position (the lower end of the pin swings inward), the fuse tube and the first connecting seat swing outward around the second rotating shaft synchronously, and the second connecting seat swings inward around the support shaft. When the fuse tube is dislodged from the stationary contact, the corresponding swing structure on the fuse swings freely to perform a further drop action.

[0018] Meanwhile, as someone skilled in the art, I would like to know that in this solution, the actuator is used to change the position of the pin on its motion trajectory. The movement of the pin under the action of the actuator can be linear motion, oscillation or other motion forms. From the perspective of the simplicity of the actuator structure, the following is an electromagnetic actuator.

[0019] As a further technical solution for the aforementioned drop-out fuse actuator:

[0020] When the pin blocks the swing arm, the lever arm between the pin and the third pivot is longer than the lever arm between the mating pair and the third pivot.

[0021] In the above scheme, the pin provides resistance to the swing arm. If the swing arm is regarded as a lever with the third rotating shaft as the fulcrum, then the force arm between the pin and the third rotating shaft on the swing arm is the power arm, and the force arm between the third rotating shaft and the mating pair is the resistance arm. The force is applied to the pin to maintain the relative angle between the first connecting seat and the second connecting seat. The swing arm is a force-saving lever, so the pin is subjected to a smaller force from the swing arm, which can effectively reduce the force required by the driver to apply to the pin, thereby effectively reducing the power consumption of the fuse when performing non-fusible element tripping operation, and facilitating the configuration of a power source for the driver.

[0022] The mating pair is a meshing tooth or tooth groove located at the end of the swing arm.

[0023] In practical applications, one of the meshing teeth and the tooth groove is located on the rocker arm, and the other is located on the first connecting seat. The meshing teeth and the tooth groove form a meshing relationship. For example, the meshing teeth are located at the end of the rocker arm, and the tooth groove is located on the edge of the side panel of the first connecting seat. The meshing teeth are embedded in the tooth groove. When the other end of the rocker arm is locked by the pin, the cooperation between the tooth groove and the meshing teeth constrains the first connecting seat and the second connecting seat to a state in which they cannot rotate relative to each other. This solution has a simple structure and the locking of the first connecting seat by the rocker arm is reliable. As an alternative to the aforementioned mating pair, the swing arm is provided with a strip groove extending along its length, and a boss is fixed on the first connecting seat. The boss is slidably fitted into the strip groove. Through the mutual constraint between the side of the boss and the side of the strip groove, the boss slides along the length of the strip groove when it is flipped relative to the first and second connecting seats, thus achieving the purpose of the mating pair as a linkage component between the first connecting seat and the swing arm. This solution differs from the above-mentioned solution that achieves linkage through gear meshing. An easily implemented solution is to stack the swing arm and the first connecting seat structure that carries the boss, which is not conducive to controlling the thickness of the fuse. It is also not conducive to setting the first and second connecting seats and the swing arm to have a mating surface, while the above-mentioned mating surface is beneficial to the accuracy control of the motion trajectory of each part during relative movement in this solution. Alternatively, the strip groove can be set on the first connecting seat, and the boss can be set on the swing arm. Alternatively, the swing arm can be rotatably connected to the first connecting seat via a rotating shaft. A strip groove that cooperates with the third rotating shaft is provided on the swing arm. This scheme is achieved by rotating and sliding the swing arm around the third rotating shaft on the second connecting seat when the first connecting seat is flipped relative to the second connecting seat. To match this scheme, a pin can be used to constrain the swing angle of the swing arm on the second connecting seat. That is, the swing arm has different swing angles in the first position and the second position.

[0024] The second connecting seat includes two side plates that are arranged opposite each other, and the two side plates are fixedly connected by a connecting rod;

[0025] Each side plate is equipped with a support shaft, and the support shafts on the two side plates are coaxial;

[0026] When the second connecting seat is provided with a second shaft hole, both side plates are provided with a second shaft hole. The second shaft holes of the two side plates are coaxial, and the axes of the second shaft hole, the support shaft, and the third rotating shaft are parallel to each other.

[0027] When the second connecting seat is provided with the second rotating shaft, different ends of the second rotating shaft are supported on different side plates, and the axes of the second rotating shaft, the support shaft and the third rotating shaft are parallel to each other.

[0028] A cavity is formed between the two side plates;

[0029] At least one side plate is provided with a third shaft hole and a driver. The third shaft hole serves as a shaft hole that mates with a third rotating shaft. The driver is located on the outer side of the side plate, and the swing arm is located on the inner side of the side plate. The side plate is provided with a pin hole that slidably mates with a pin. The driver is used to drive the pin to slide along the length direction of the pin hole. The pin passes through the pin hole and through the side plate.

[0030] In this design, the connecting rod constrains the second connecting seat into an integral structure. The support shaft serves as a structure for the second connecting seat to rotatably engage with the fuse base, forming support points on both sides of the second connecting seat to support it on the base. Similar to the support shaft, the second shaft holes and second rotating shafts on each side plate allow the first connecting seat to be rotatably connected to the second connecting seat on both sides via rotating shafts. The cavity accommodates the first connecting seat. Preferably, the first connecting seat is constrained within the cavity by the inner sides of the two side plates, thus limiting its position on the second rotating shaft axis. The third shaft hole is used to mount a swing arm on the inner side of the side plate, and the pin hole is used to mount a pin on the side plate. When only one side plate has a third shaft hole and a driver... To constrain the swing arm using a pin, and to achieve the purpose of constraining the relative posture of the first and second connecting seats through the cooperation of the pin, the pin needs to be subjected to a large normal force from the swing arm. At this time, a higher requirement is placed on the ability of the driver to drive the pin to move. When both side plates are configured with a third shaft hole and a driver, the force loaded by the first connecting seat on a single swing arm is smaller. Therefore, for the driver configured for each swing arm, the requirement for the driver to drive the pin to move is lower. Therefore, the preferred approach is to configure a third shaft hole and a driver on both side plates. The number of drivers, pins, and swing arms can be flexibly selected according to the specific application scenario or conditions, such as configuring a driver, pin, and swing arm on only a single side plate, or configuring a driver, pin, and swing arm on each side plate.

[0031] In practical applications, the axis directions of the second rotating shaft, the third rotating shaft, and the support shaft are along the front-back direction, so the swing direction of the swing arm is the left-right direction. In order to enable the pin to change the constraint state on the swing arm at different positions, the pin can move back and forth to constrain the swing arm to different positions in the left and right directions. A simple structural form is that the pin hole extends along the front-back direction, and the driver drives the pin to move in the front-back direction.

[0032] The second connecting seat includes a side plate, on which a third shaft hole and a driver are disposed. The third shaft hole serves as a shaft hole that mates with a third rotating shaft. The driver is disposed on the outer side of the side plate, and the swing arm is disposed on the inner side of the side plate. The side plate is provided with a pin hole that slidably mates with a pin. The driver is used to drive the pin to slide along the length direction of the pin hole. The pin passes through the pin hole and through the side plate.

[0033] The end of the pin near the inner side of the side plate is a sloping end with an inclined surface. The sloping surface is such that when the pin moves to the first position in the stroke under the action of the driver, the sloping end blocks the swing arm through the bottom side of the sloping surface; when the pin moves to the second position in the stroke under the action of the driver, the position on the sloping surface used to block the swing arm moves towards the top side of the sloping surface, and the swing arm is in a state supported by the sloping surface.

[0034] In the above scheme, the end of the pin closest to the inner side of the side plate is the end into the second connecting seat. The first position is the position where the pin is inserted deeper into the second connecting seat. Compared to the first position, the second position is the position where the pin is inserted shallower into the second connecting seat. In this scheme, the engagement position of the swing arm and the pin is located on the inclined surface. Thus, the action of the pin from the first position to the second position is the pin retraction. After the retraction is completed, the blocking position of the pin on the swing arm changes, which breaks the original stable state of the first connecting seat. Relative to the upper end of the fuse tube after rotation with the second connecting seat... When the fuse tube is disengaged from the stationary contact and reset using the operating lever, the opening and swinging of the first and second connecting seats around the second pivot requires the swing arm to swing towards the bottom of the slope. During this process, the pin does not obstruct the swing arm's swing. Furthermore, when a return spring is provided for the pin, it can automatically move to the first position. This allows the pin to automatically reset to the first stable position after the upper end of the fuse tube is embedded in the groove of the stationary contact, maintaining the relative stability of the first and second connecting seats. Therefore, using the above-mentioned scheme with a slope and the swing arm supported by the slope, the fuse can be reset very conveniently upon power-on. In specific implementation, if an electromagnetic actuator is used as the actuator, the first position is the position where the pin is pushed forward under the action of the return spring after the electromagnetic actuator is de-energized. The second position is the position where the pin retracts with the moving iron core after the electromagnetic actuator is energized. However, in both positions, the swing arm remains supported by the slope at the end of the pin.

[0035] The inner surface of the side plate is provided with an arc-shaped groove, the center of which is located on the axis of the third rotating shaft.

[0036] It also includes a slider fixed to the swing arm, the slider being embedded and slidably engaged in a groove;

[0037] When the pin moves to the second position of its stroke under the action of the driver, the slider swings with the swing arm to the end side of the slide groove.

[0038] In this solution, when the swing arm rotates with the first connecting seat under the linkage of the mating pair, the slider slides in the groove. For the position on the inclined surface used to support the pin, when the slider swings with the swing arm to the end side of the groove, the swing arm can no longer swing forward. Therefore, this solution can optimize the force on the actuator by utilizing the support provided by the end of the groove to the slider, thereby ensuring the reliability of the moving parts. On the other hand, the actuator, including the electromagnetic drive, can be an externally purchased mechanism. When the groove is present, it limits the stop position of the swing arm. From the perspective of preventing the swing arm from swinging past the pin, this solution does not rely on the special selection of the actuator or the customization of a dedicated actuator. Therefore, this solution is also easy to implement.

[0039] On the cross-section of the chute, the position where the chute width is at its maximum is located inside the chute opening;

[0040] The shape of the slider is adapted to the groove, and the groove limits the position of the slider in the groove depth direction by constraining the slider surface with its groove surface.

[0041] In this scheme, the maximum width of the groove is located inside the groove opening, and a slider that matches the cross-sectional shape of the groove is used to limit the slider in the groove depth direction. Thus, if the groove starts from the surface of the side plate, when the slider is inserted into the groove from the opening end, the side plate limits the position of the swing arm on the third rotating shaft through the groove. For the swing arm, the third rotating shaft is located at the end of the swing arm near the mating pair, and the slider is located at the other end of the swing arm. This swing arm constraint method is beneficial to the positional stability of the swing arm relative to the side plate.

[0042] The driver is an electromagnetic driver including an electromagnetic coil, a return spring and a moving iron core, and the pin is fixedly connected to the moving iron core;

[0043] When the electromagnetic coil is energized, the electromagnetic coil drives the pin to perform a retraction action by moving to the outside of the side plate through the moving iron core. Under the action of the driver, the pin moves to the second position of the stroke.

[0044] When the electromagnetic coil is de-energized, the reset spring pushes the pin or the moving iron core, causing the pin to perform a feeding action that moves inward toward the side plate. Under the action of the driver, the pin moves to the first position of its stroke.

[0045] In this design, both the electromagnetic coil and the return spring act on the latch. Specifically, when the electromagnetic coil is energized, it changes the position of the latch from the first position to the second position, so that the swing arm releases its constraint on the first connecting seat. When the electromagnetic coil is de-energized, the return spring changes the position of the latch from the second position to the first position, so that the swing arm constrains the first connecting seat. Under the action of the fuse base and the top stationary contact, the relative angle between the first and second connecting seats is maintained. Therefore, in this design, when the status of the fuse needs to be remotely controlled, only a short power supply to the electromagnetic coil is required, which can effectively reduce the power consumption of the fuse during normal operation.

[0046] As those skilled in the art know, a fuse disconnecting the circuit when the fuse element is not blown is generally used to deal with emergencies. Therefore, the fuse does not need to consume high power during normal operation. Based on this, this solution provides a power supply module. Specifically, the battery is used to store electrical energy and does not need to have a large output power. The capacitor is charged so that the power supply module can provide sufficient power output to the electromagnetic coil when needed. It also includes a power supply module for supplying power to the electromagnetic coil. The power supply module includes a battery and a capacitor. The battery is used to charge the capacitor, and the capacitor is used to supply power to the electromagnetic coil.

[0047] To facilitate the configuration of the driver and the matching relationship between the second connector and the fuse base, from the inside to the outside of the second connector, the side plate includes a first seat body, a support shaft, a second seat body and a connecting tube that are connected in sequence and have a relatively fixed relationship. The fixed connection position of the connecting rod on the side plate is located on the first seat body. Both the first seat body and the second seat body are structures that bulge outward relative to the side of the support shaft.

[0048] The second shaft hole, the third shaft hole, and the pin hole are all provided on the first base body. The second shaft hole is a through hole or blind hole extending along the thickness direction of the first base body, and the third shaft hole is an internal threaded hole extending along the thickness direction of the first base body. Both the support shaft and the second base body are hollow structures with a central hole inside. The central holes of the support shaft and the second base body are coaxial and connected to each other. The pin hole is connected to the central hole, and the extension direction of the pin hole is parallel to the axis of the central hole.

[0049] The connecting pipe has a hole that is coaxial with and communicates with the central hole. The connecting pipe is a threaded pipe structure with connecting threads on the outside or on the inside. The driver is connected to the connecting pipe through the connecting threads.

[0050] In this design, the first base, being the structure closest to the inner side of the second connecting base on the side plate, carries the second rotating shaft, the third rotating shaft, and the pin through the second shaft hole, the third shaft hole, and the pin hole, respectively. The third shaft hole is configured as an internal thread hole, designed to constrain the position of the swing arm in the thickness direction of the first base using the third rotating shaft with a stud and a nut. The second and first bases form bosses at different ends of the support shaft. For the groove formed on the base hook, the second and first bases constrain the position of the support shaft in the length direction of the groove. Both the support shaft and the second base are hollow structures, with the central hole and the pin hole communicating with each other. This is intended to ensure that when the electromagnetic actuator is connected using the connecting thread on the connecting pipe, the structure formed by the moving iron core and the pin can be guided into the inner side of the first base through the central hole and the pin hole. The second base, located outside the support shaft, can be used to install the outer casing of the electromagnetic actuator. The cavity between the outer casing and the electromagnetic actuator is used to install the power supply module, and both the power supply module and the electromagnetic actuator are located inside the outer casing.

[0051] This utility model has the following beneficial effects:

[0052] This solution is applied to drop-out fuses and does not affect the fuse tube's normal drop-out action after the fuse element melts. It is also a technical solution that enables the fuse to execute remote tripping commands. In addition, this solution has a simple structure and can effectively reduce the size of the fuse that executes the tripping command. When applied to fuses, no additional insulation mechanism is required. Attached Figure Description

[0053] Figure 1 This is a structural schematic diagram of a specific application embodiment of the drop-out fuse actuator for smart grids described in this solution. The schematic diagram is a partial structural diagram of the fuse. For the convenience of showing the structural features, the base, upper stationary contact and fusible element are not shown.

[0054] Figure 2 This is a structural diagram of a specific application embodiment of the drop-out fuse actuator for smart grids described in this solution, and... Figure 1 There is a difference; this structural diagram includes the melt.

[0055] Figure 3 This is a schematic diagram of the side plate in a specific embodiment of the drop-out fuse actuator for smart grids described in this solution;

[0056] Figure 4 This is a schematic diagram of the side plate structure in a specific embodiment of the drop-out fuse actuator for smart grids described in this solution. Figure 3 There is a difference; the diagram shows the latch.

[0057] Figure 5 A schematic diagram of the swing arm structure in a specific embodiment of the drop-out fuse actuator for smart grids described in this solution;

[0058] Figure 6 This is a schematic diagram of the structure of the second connecting seat in a specific embodiment of the drop-out fuse actuator for smart grids described in this solution.

[0059] The reference numerals in the attached figures are as follows: 1. Fuse tube, 2. Tube seat, 3. First rotating shaft, 4. First connecting seat, 5. Second rotating shaft, 6. Push plate, 7. Torsion spring, 8. Mating pair, 9. Third rotating shaft, 10. Swing arm, 11. Second connecting seat, 12. Driver, 13. First seat body, 14. Second shaft hole, 15. Third shaft hole, 16. Support shaft, 17. Pin hole, 18. Slide groove, 19. Second seat body, 20. Pin, 21. Engaging tooth, 22. First shaft hole, 23. Slider, 24. Connecting rod, 25. Side plate, 26. Groove, 27. Melt, 28. Connecting tube. Detailed Implementation

[0060] The present invention will be further described in detail below with reference to the embodiments, but the present invention is not limited to the following embodiments:

[0061] Example 1:

[0062] like Figures 1 to 6 As shown, the drop-out fuse actuator for smart grids includes a second connecting seat 11, on which a second shaft hole 14 or a second rotating shaft 5 is provided;

[0063] A swing arm 10 is connected to the second connecting seat 11 via a third rotating shaft 9. One end of the swing arm 10 is provided with a mating pair 8 as a linkage component.

[0064] It also includes a driver 12 mounted on the second connector 11, the driver 12 being configured with a pin 20 whose position can be changed under the action of the driver 12, the pin 20 being able to block the other end of the swing arm 10 and release the other end of the swing arm 10 in its movement trajectory.

[0065] Existing drop-out fuses capable of remote tripping, when the actuator performs related actions, require a specific tripping mechanism. For the fuse tripping action when the fuse element 27 has not melted, the fuse element 27 pulls the fuse tube 1 and the lower connecting seat into a rigid structure clamped between the upper stationary contact and the lower base groove. This means that before tripping, the entire structure is elastically clamped between the base and the contact piece. Therefore, the motor needs to output sufficient torque to force the fuse tube 1 to swing and break free from the contact piece's constraint on its upper end. Problems to be solved include the on-site power supply for a high-power motor. Because the actuator is large and needs to be located on the periphery of the fuse as a load-bearing structure, it generally needs to be installed on surrounding electrical equipment. When such installation conditions are not available on-site, the surrounding electrical equipment needs to be modified, and insulation isolation from surrounding electrical equipment is also involved. Therefore, this solution aims to provide a technical solution that effectively reduces the size of the fuse capable of executing tripping commands, has a simple structure, and does not require additional insulation mechanisms when applied to fuses.

[0066] Specifically, this actuator is installed on the fuse, serving as a structure that supports the fuse tube 1 on the base before the fusible element 27 melts. The following description uses a drop-out fuse including a base, fuse tube 1, tube seat 2, and first connecting seat 4 as an example. The fuse tube 1 is fixedly connected to the tube seat 2, and the tube seat 2 is rotatably mounted on the first connecting seat 4 via the first rotating shaft 3. When the fusible element 27 has not melted, it pulls the fuse tube 1 to a fixed position relative to the first connecting seat 4. This example illustrates the usage and characteristics of this actuator. In application, the second connecting seat 11 is rotatably connected to the first connecting seat 4 via the second shaft hole 14 or the second rotating shaft 5. (The second shaft hole 14 serves as the shaft hole for setting the second rotating shaft 5. Therefore, it is necessary to set the second rotating shaft 5 as the rotating shaft between the first connecting seat 4 and the second connecting seat 11. This is limited to the second shaft hole 14 being provided on the second connecting seat 11, that is, the second shaft hole 14 serving as the mounting hole for the second rotating shaft 5. This is limited to the second connecting seat 11 being provided with the second rotating shaft 5, that is, the second rotating shaft 5 being directly set on the second connecting seat 11.) One end of the swing arm 10 engages with the first connecting seat 4 via a mating pair 8. The mating pair 8 serves as the linkage component between the first connecting seat 4 and the swing arm 10. The mating pair 8 is used to achieve: the first connecting seat 4 relative to the second connecting seat 11 When the first connecting seat 4 rotates around the second pivot 5, it drives the swing arm 10 to swing around the third pivot 9 via the mating pair 8. Under the action of the driver 12, the pin 20 can move to the swing trajectory of the swing arm 10 around the third pivot 9. When the pin 20 is in the position of blocking the swing arm 10, the first connecting seat 4 is configured so that the upper end of the fuse tube 1 is engaged with the upper stationary contact of the drop-out fuse. In this state, under the action of the swing arm 10, the fuse tube 1 is constrained by the pin 20 as it swings down around the second pivot 5 with the first connecting seat 4. At this time, the obstruction of the pin 20 on the swing arm 10 is used to maintain the state of the fuse tube 1, so that it can generate power in the power grid. When the driver 12 drives the pin 20 under the control command, causing it to move from the first position of blocking the swing arm 10 to the second position of releasing the swing arm 10, the pin 20 allows the swing arm 10 to swing at a certain angle. Similarly, the swing arm 10 allows the first connecting seat 4 to swing at a certain angle relative to the second connecting seat 11 around the second rotating shaft 5. Under the action of their own weight and / or under the pushing force of the upper stationary contact of the fuse tube 1 on the upper moving contact of the fuse tube 1, the fuse tube 1 rotates synchronously with the first connecting seat 4 around the second rotating shaft 5, and the fuse tube 1 obtains the drop action.

[0067] In the above application, the structure formed by the fuse tube 1, the first connecting seat 4 and the tube seat 2 is the structure usually included in the existing drop-out fuse. Under normal use, the structure is pulled into a tensioned integral structure by the fuse element 27 set between the fuse tube 1 and the first connecting seat 4. When the fuse element 27 melts, the fuse tube 1 rotates around the first rotating shaft 3 and performs a drop-out action to cut off the circuit. Based on existing technology, the above application connects the first connecting seat 4 to the second connecting seat 11 via the second rotating shaft 5, and a swing arm 10 is mounted on the second connecting seat 11 via the third rotating shaft 9. An actuator 12 is mounted on the second connecting seat 11, and a pin 20 is mounted on the actuator 12. A mating pair 8, acting as a linkage component, exists between the swing arm 10 and the first connecting seat 4. Thus, the structure formed by the fuse tube 1, the first connecting seat 4, and the second connecting seat 11 can be considered a three-bar linkage structure with the first rotating shaft 3 and the second rotating shaft 5. The relative rotation between the fuse tube 1 and the first connecting seat 4 is achieved when the fuse element 27 melts. The relative rotation between the first connecting seat 4 and the second connecting seat 11 is achieved when the pin 20 allows the swing arm 10 to swing further. In the normal operating state of the drop-out fuse, the second connecting seat 11 is rotatably supported in the groove of the drop-out fuse base. The moving contact of the fuse tube 1 engages with the stationary contact above it. When the actuator 12 positions the pin 20 to the first position of its stroke, the pin... Pin 20 acts as a stopper for the swing arm 10 to rotate around the third pivot 9. The other end of the swing arm 10, under the action of the mating pair 8, prevents the first connecting seat 4 and the second connecting seat 11 from rotating relative to the second pivot 5. In this state, pin 20 forces the first connecting seat 4 and the second connecting seat 11 to be unable to rotate relative to each other. Therefore, the components of the above three-bar linkage cannot swing, causing a decrease in the distance between the upper end of the fuse tube 1 and the second pivot 5. In this state, the above three-bar linkage is stably clamped between the groove and the upper stationary contact. In between, it provides the structural basis for circuit connection. When the pin 20 moves to the second position of its stroke under the action of the driver 12, the original blocking effect is eliminated. Under the weight of the fuse tube 1 and the first connecting seat 4, and the pushing force of the stationary contact on the fuse tube 1, the state of the above three-bar structure is broken. When the upper end of the fuse tube 1 comes out of the groove 26 on the stationary contact, the above three-bar structure swings freely. At this time, the fuse tube 1 obtains a drop action, and the drop-out fuse performs the tripping drop through the action of the driver 12.

[0068] In summary, unlike existing technologies, the above application adds a second connecting seat 11 to the existing fuse tube 1 connecting seat (first connecting seat 4). Whether the first connecting seat 4 and the second connecting seat 11 can swing depends on the position of the pin 20 in its stroke under the action of the driver 12. Therefore, when the drop-out fuse needs to execute a control command to disconnect the circuit, it is only necessary to change the position of the pin 20 in its stroke through the driver 12. Thus, this solution provides a drop-out fuse for smart grids. At the same time, the drop-out fuse can still perform the normal drop-out action of the fuse tube 1 after the fuse element 27 melts through the fuse element 27 connected between the first connecting seat 4 and the fuse tube 1.

[0069] The above solution differs from existing technologies in that, unlike traditional fuses with actuators, the above solution uses pin 20, swing arm 10, and mating pair 8 to constrain the first connecting seat 4 and the second connecting seat 11 to a stable state (when pin 20 is in the first position). After pin 20 moves (when pin 20 is in the second position), this stable state is disrupted by its own weight and thrust. After the first connecting seat 4 and the second connecting seat 11 flip so that the fuse tube 1 separates from the groove 26 on the stationary contact (after the structure formed by the first connecting seat 4 and the second connecting seat 11 becomes unstable, for the implementation method where the second connecting seat 11 can be flipped and connected in the groove of the base, the second connecting seat 11 also flips in the groove), the fuse tube 1 freely flips and falls with the first connecting seat 4 relative to the second connecting seat 11. (The implementation of the second connecting seat 11 being flipped and connected in the groove of the base also involves the second connecting seat 11 flipping around the groove and falling.) Therefore, when the above scheme realizes the tripping action of the non-fusible element 27, it is not by pushing or pulling the connecting seat to make the upper end of the fuse tube 1 overcome the obstruction of the stationary contact and perform the falling action. The corresponding actuator (including the driver 12 and the pin 20) is simpler in structure and smaller in size than the existing actuator. The second connecting seat 11 serves as the connection structure between the base and the first connecting seat 4. The second connecting seat 11 serves as the connection structure between the driver 12 and the swing arm 10. Therefore, it is not necessary to configure a force-bearing structure on the structure other than the movable part of the fuse. The above scheme does not require reconfiguring the installation conditions on site for the force-bearing structure or considering the insulation isolation measures with the surrounding electrical equipment.

[0070] As those skilled in the art, to adapt to the requirements of fuse drop-out, the rotatable engagement between the groove on the base of the drop-out fuse and the second connecting seat 11 can also be achieved by replacing it with a connection between the second connecting seat 11 and the base via a rotating shaft. For example, the second connecting seat 11 is provided with a support shaft 16 for supporting the second connecting seat 11 in the groove of the drop-out fuse base. The axes of the support shaft 16, the third rotating shaft 9, the second rotating shaft 5, and the first rotating shaft 3 are parallel to each other. When the support shaft 16 is supported in the groove of the drop-out fuse base, above the fuse tube 1... When the moving contact engages with the stationary contact at the upper end of the drop-out fuse, the pin 20 is in the first position. The engagement of the support shaft 16 with the groove can be achieved by rotatably connecting the support shaft 16 to the shaft hole of the base. When the pin 20 moves to the second position, the swing arm 10 is allowed to rotate around the third rotating shaft 9. Under the above self-weight and thrust, the first connecting seat 4 and the second connecting seat 11 spontaneously flip relative to each other, and the second connecting seat 11 and the base spontaneously flip relative to each other. This eventually causes the fuse tube 1 to come out of the upper stationary contact, and the entire drop-out fuse undergoes a free fall action.

[0071] In practical implementation, since the fuse tube 1 is usually installed at a certain angle to the vertical line of the ground with its upper end facing outward, when the support shaft 16 is regarded as a reference point, the first rotating shaft 3 and the second rotating shaft 5 can be configured to be located outside the support shaft 16. To increase the length of the lever arm between the pin 20 on the swing arm 10 and the third rotating shaft 9, the engagement position of the swing arm 10 and the pin 20 is located inside the support shaft 16. Preferably, to improve the drop efficiency of the fuse tube 1, so that the fuse tube 1 swings outward rapidly after the molten body 27 melts, and the pin 20 moves, under the corresponding gravity and thrust, the overall structure formed by the first connecting seat 4 and the fuse tube 1 swings outward rapidly. The center of gravity of the structure formed by the fuse tube 1 and the seat is set to be located outside the first rotating shaft 3, the center of gravity of the structure formed by the fuse tube 1, the seat, and the first connecting seat 4 is located outside the second rotating shaft 5, and the center of gravity of the structure formed by the second connecting seat 11, the swing arm 10, the pin 20, the swing arm 10, and the driver 12 is located on the support shaft. On the outside of 16, the swing arm 10 swings in the inward and outward directions at the end that engages with the pin 20. The first position is located outside the second position. In contrast to the normal engagement of the upper end of the fuse tube 1 with the stationary contact in the first position, when the pin 20 moves to the second position (the lower end of the pin 20 swings inward), the fuse tube 1 and the first connecting seat 4 swing outward around the second rotating shaft 5 in sync, and the second connecting seat 11 swings inward around the support shaft 16. When the fuse tube 1 comes off the stationary contact, the corresponding swing structure on the fuse swings freely to perform a further drop action.

[0072] Meanwhile, as someone skilled in the art, I would like to know that in this solution, the driver 12 is used to change the position of the pin 20 on its motion trajectory. The motion of the pin 20 under the action of the driver 12 can be linear motion, swinging or other motion forms. From the perspective of the simplicity of the actuator structure, the following driver 12 is an electromagnetic driver.

[0073] Example 2:

[0074] This embodiment is a further refinement of embodiment 1:

[0075] When the pin 20 blocks the swing arm 10, the lever arm between the pin 20 and the third rotating shaft 9 on the swing arm 10 is longer than the lever arm between the mating pair 8 and the third rotating shaft 9.

[0076] In the above scheme, the pin 20 provides a resistance function for the swing arm 10. If the swing arm 10 is regarded as a lever with the third rotating shaft 9 as the fulcrum of rotation, then the force arm between the pin 20 and the third rotating shaft 9 on the swing arm 10 is the power arm, and the force arm between the third rotating shaft 9 and the mating pair 8 is the resistance arm. The force is received from the pin 20 to maintain the relative angle between the first connecting seat 4 and the second connecting seat 11. The swing arm 10 is a force-saving lever, so the pin 20 is subjected to a smaller force from the swing arm 10, which can effectively reduce the force required by the driver 12 to apply to the pin 20, thereby effectively reducing the power consumption of the fuse when performing the non-fusible element 27 fuse tripping action, and facilitating the configuration of a power source for the driver 12.

[0077] Example 3:

[0078] This embodiment is a further refinement of embodiment 1:

[0079] The mating pair 8 is a meshing tooth 21 or tooth groove provided at the end of the swing arm 10.

[0080] In practical application, one of the meshing teeth 21 and the tooth groove is set on the rocker arm 10, and the other is set on the first connecting seat 4. The meshing teeth 21 and the tooth groove form a tooth meshing relationship. For example, the meshing teeth 21 are located at the end of the rocker arm 10, and the tooth groove is located on the edge of the side panel of the first connecting seat 4. The meshing teeth 21 are embedded in the tooth groove. When the other end of the rocker arm 10 is locked by the pin 20, the cooperation between the tooth groove and the meshing teeth 21 constrains the first connecting seat 4 and the second connecting seat 11 to a state in which they cannot rotate relative to each other. This solution has a simple structure and the locking of the first connecting seat 4 by the rocker arm 10 is reliable. As an alternative to the aforementioned mating pair 8, the swing arm 10 is provided with a strip groove extending along the length direction of the swing arm 10, and a boss is fixed on the first connecting seat 4. The boss is slidably fitted in the strip groove. Through the mutual constraint between the side of the boss and the side of the strip groove, the boss slides in the length direction of the strip groove when it is flipped relative to the first connecting seat 4 and the second connecting seat 11, so that the mating pair 8 serves as a linkage component between the first connecting seat 4 and the swing arm 10. This solution differs from the above solution that achieves linkage through gear meshing. The easily implemented solution is that the swing arm 10 and the first connecting seat 4 that carries the boss are stacked. This is not conducive to controlling the thickness of the fuse, and it is also not conducive to setting the first connecting seat 4 and the second connecting seat 11 to have a mating surface, and to setting the swing arm 10 and the second connecting seat 11 to have a mating surface. The above-mentioned mating surface is beneficial to the accuracy control of the motion trajectory of each part during relative movement in this solution. Alternatively, the strip groove can be set on the first connecting seat 4, and the boss can be set on the swing arm 10. Alternatively, the swing arm 10 can be rotatably connected to the first connecting seat 4 via a rotating shaft, and a strip groove that cooperates with the third rotating shaft 9 can be set on the swing arm 10. That is, when the first connecting seat 4 is flipped relative to the second connecting seat 11, the swing arm 10 rotates and slides around the third rotating shaft 9 on the second connecting seat 11. Matching this scheme, the pin 20 can constrain the swing angle of the swing arm 10 on the second connecting seat 11, that is, the swing arm 10 has different swing angles in the first position and the second position.

[0081] Example 4:

[0082] This embodiment is a further refinement of embodiment 1:

[0083] The second connecting seat 11 includes two side plates 25 arranged opposite each other, and the two side plates 25 are fixedly connected by a connecting rod 24;

[0084] Each side plate 25 is provided with a support shaft 16, and the support shafts 16 on the two side plates 25 are coaxial;

[0085] When the second connecting seat 11 is provided with a second shaft hole 14, both side plates 25 are provided with a second shaft hole 14. The second shaft holes 14 of the two side plates 25 are coaxial, and the axes of the second shaft hole 14, the support shaft 16, and the third rotating shaft 9 are parallel to each other.

[0086] When the second connecting seat 11 is provided with the second rotating shaft 5, different ends of the second rotating shaft 5 are supported on different side plates 25, and the axes of the second rotating shaft 5, the support shaft 16 and the third rotating shaft 9 are parallel to each other.

[0087] A cavity is formed between the two side plates 25;

[0088] At least one side plate 25 is provided with a third shaft hole 15 and a driver 12. The third shaft hole 15 serves as a shaft hole that mates with the third rotating shaft 9. The driver 12 is located on the outer side of the side plate 25, and the swing arm 10 is located on the inner side of the side plate 25. The side plate 25 is provided with a pin hole 17 that slidably engages with the pin 20. The driver 12 is used to drive the pin 20 to slide along the length direction of the pin hole 17. The pin 20 passes through the side plate 25 through the pin hole 17.

[0089] In this design, the connecting rod 24 constrains the second connecting seat 11 into an integral structure. The support shaft 16 serves as a structure for the second connecting seat 11 to rotatably engage with the fuse base, forming support points on both sides of the second connecting seat 11 to support it on the base. Similar to the support shaft 16, the second shaft holes 14 and second rotating shafts 5 on each side plate 25 are used to form a first connecting seat 4 that is rotatably connected to the second connecting seat 11 on both sides via rotating shafts. The cavity is used to accommodate the first connecting seat 4. Preferably, the first connecting seat 4 is constrained in the cavity by the inner sides of the two side plates 25, thereby limiting the position of the first connecting seat 4 on the axis of the second rotating shaft 5. The third shaft hole 15 is used to arrange the swing arm 10 on the inner side of the side plate 25, and the pin hole 17 is used to arrange the pin 20 on the side plate 25. When only one side plate 25 has the third shaft hole 15 and the driver 12, the pin 20 is used for constraint. The swing arm 10, through its cooperation with the auxiliary plate 8, constrains the relative posture of the first connecting seat 4 and the second connecting seat 11. Therefore, the pin 20 needs to be subjected to a large normal force from the swing arm 10. This places higher demands on the ability of the driver 12 to drive the pin 20. When both side plates 25 are configured with a third shaft hole 15 and a driver 12, the force of the first connecting seat 4 on a single swing arm 10 is smaller. Therefore, for the driver 12 configured for each swing arm 10, the requirement for the driver 12 to drive the pin 20 is lower. Thus, the preferred method is to configure the third shaft hole 15 and the driver 12 on both side plates 25. The number of drivers 12, pins 20, and swing arms 10 can be flexibly selected according to the specific application scenario or conditions. For example, only a single side plate 25 can be configured with drivers 12, pins 20, and swing arms 10, or each side plate 25 can be configured with drivers 12, pins 20, and swing arms 10.

[0090] In practical applications, the axis directions of the second rotating shaft 5, the third rotating shaft 9, and the support shaft 16 are along the front-back direction, so the swing direction of the swing arm 10 is the left-right direction. In order for the pin 20 to change the constraint state on the swing arm 10 at different positions, the pin 20 can move back and forth to constrain the swing arm 10 at different positions in the left-right direction. A simple structural form is that the pin hole 17 extends along the front-back direction, and the driver 12 drives the pin 20 to move in the front-back direction.

[0091] Example 5:

[0092] This embodiment is a further refinement of embodiment 1:

[0093] The second connecting seat 11 includes a side plate 25, on which a third shaft hole 15 and a driver 12 are disposed. The third shaft hole 15 serves as a shaft hole that cooperates with the third rotating shaft 9. The driver 12 is disposed on the outer side of the side plate 25, and the swing arm 10 is disposed on the inner side of the side plate 25. The side plate 25 is provided with a pin hole 17 that slides with the pin 20. The driver 12 is used to drive the pin 20 to slide along the length direction of the pin hole 17. The pin 20 passes through the side plate 25 through the pin hole 17.

[0094] The end of the pin 20 near the inner side of the side plate 25 is an inclined end with a sloping face. The sloping face is such that when the pin 20 moves to the first position in the stroke under the action of the driver 12, the inclined end blocks the swing arm 10 through the bottom side of the slope; when the pin 20 moves to the second position in the stroke under the action of the driver 12, the position on the inclined face that blocks the swing arm 10 moves to the top side of the slope, and the swing arm 10 is in a state supported by the inclined face.

[0095] In the above scheme, the end of the pin 20 closest to the inner side of the side plate 25 is the end into the second connecting seat 11. The first position is the position where the pin 20 is inserted deeper into the second connecting seat 11. Compared to the first position, the second position is the position where the pin 20 is inserted shallower into the second connecting seat 11. In this scheme, the engagement position of the swing arm 10 and the pin 20 is located on the inclined surface. Thus, the action of the pin 20 from the first position to the second position is the retraction of the pin 20. After the retraction is completed, the blocking position of the pin 20 on the swing arm 10 changes, which breaks the original stable state of the first connecting seat 4. Relative to the fuse tube 1 after rotation with the second connecting seat 11... The upper end of the fuse tube detaches from the stationary contact. When the fuse tube 1 is reset by the operating lever, the opening and swinging of the first connecting seat 4 and the second connecting seat 11 around the second rotating shaft 5 requires the swing arm 10 to swing towards the bottom of the slope. During this process, the pin 20 does not hinder the swing arm 10 from swinging. When a reset spring is provided for the pin 20, the pin 20 can automatically move to the first position. After the upper end of the fuse tube 1 is in the groove 26 embedded in the stationary contact, the pin 20 automatically resets to maintain the first position where the first connecting seat 4 and the second connecting seat 11 are relatively stable. Therefore, by adopting the above scheme with a slope and the swing arm 10 supported by the slope, the fuse can be reset very conveniently. In specific implementation, if an electromagnetic driver is used as the driver 12, the first position is the position where the pin 20 is pushed forward under the action of the reset spring after the electromagnetic driver is de-energized, and the second position is the position where the pin 20 retracts to the rearward position with the moving iron core after the electromagnetic driver is energized. However, in both positions, the swing arm 10 is maintained in a state supported by the inclined surface at the end of the pin 20.

[0096] Example 6:

[0097] This embodiment is a further refinement of embodiment 5:

[0098] The inner side of the side plate 25 is provided with an arc-shaped groove 18, the center of which is located on the axis of the third rotating shaft 9.

[0099] It also includes a slider 23 fixed on the swing arm 10, the slider 23 being embedded and slidably engaged in the slide groove 18;

[0100] When the pin 20 moves to the second position in its stroke under the action of the driver 12, the slider 23 swings with the swing arm 10 to the end side supported by the slide groove 18.

[0101] In this scheme, when the swing arm 10 rotates with the first connecting seat 4 under the linkage of the mating pair 8, the slider 23 slides in the slide groove 18. For the position on the inclined surface used to support the pin 20, when the slider 23 swings with the swing arm 10 to the end side supported by the slide groove 18, the swing arm 10 can no longer swing forward. Therefore, this scheme can optimize the force on the actuator by utilizing the support provided by the end of the slide groove 18 for the slider 23, thereby ensuring the reliability of the moving parts of this scheme. On the other hand, the actuator including the electromagnetic drive can be an externally purchased mechanism. When the slide groove 18 is present, the slide groove 18 limits the stop position of the swing arm 10. From the perspective of preventing the swing arm 10 from swinging past the angle of the pin 20, this scheme does not rely on the special selection of the actuator or the customization of a dedicated actuator. Therefore, this scheme is also easy to implement.

[0102] Example 7:

[0103] This embodiment is a further refinement of embodiment 6:

[0104] On the cross-section of the slide groove 18, the position where the width of the slide groove 18 is the maximum is located inside the opening of the slide groove 18.

[0105] The shape of the slider 23 is adapted to the groove 18. The groove 18 limits the position of the slider 23 in the depth direction of the groove 18 by constraining the surface of the slider 23 through its groove surface.

[0106] In this scheme, the maximum width of the groove 18 is located inside its opening, and a slider 23 that matches the cross-sectional shape of the groove 18 is used to limit the slider 23 in the groove 18 to the depth direction of the groove 18. Thus, if the groove 18 is set to start from the surface of the side plate 25, when the slider 23 is inserted into the groove 18 from the opening end, the side plate 25 limits the position of the swing arm 10 on the third rotating shaft 9 through the groove 18. For the swing arm 10, the third rotating shaft 9 is located at one end of the swing arm 10 near the mating pair 8, and the slider 23 is located at the other end of the swing arm 10. This constraint method of the swing arm 10 is beneficial to the positional stability of the swing arm 10 relative to the side plate 25.

[0107] Example 8:

[0108] This embodiment is a further refinement of embodiment 5:

[0109] The driver 12 is an electromagnetic driver including an electromagnetic coil, a return spring and a moving iron core, and the pin 20 is fixedly connected to the moving iron core;

[0110] When the electromagnetic coil is energized, the electromagnetic coil drives the pin 20 to perform a retraction action by moving the pin 20 to the outside of the side plate 25 through the moving iron core. Under the action of the driver 12, the pin 20 moves to the second position in the stroke.

[0111] When the electromagnetic coil is de-energized, the reset spring pushes the pin 20 or the moving iron core, causing the pin 20 to perform a feeding action to move inward to the side plate 25. Under the action of the driver 12, the pin 20 moves to the first position on the stroke.

[0112] In this design, both the electromagnetic coil and the return spring act on the pin 20. Specifically, when the electromagnetic coil is energized, it changes the position of the pin 20 from the first position to the second position, so that the swing arm 10 releases its constraint on the first connecting seat 4. When the electromagnetic coil is de-energized, the return spring changes the position of the pin 20 from the second position to the first position, so that the swing arm 10 constrains the first connecting seat 4. Under the action of the fuse base and the top stationary contact, the relative angle between the first connecting seat 4 and the second connecting seat 11 is maintained. Therefore, in this design, when the state of the fuse needs to be remotely controlled, only a short power supply to the electromagnetic coil is required, which can effectively reduce the power consumption during normal operation of the fuse.

[0113] As those skilled in the art know, the fuse's circuit breaking function when the fuse element 27 is not blown is generally used to deal with emergencies. Therefore, the fuse does not need to consume high power during normal operation. Based on this, this solution provides a power supply module. Specifically, the battery is used to store electrical energy and does not need to have a large output power. The capacitor is charged so that the power supply module can provide sufficient power output to the electromagnetic coil when needed. It also includes a power supply module for supplying power to the electromagnetic coil. The power supply module includes a battery and a capacitor. The battery is used to charge the capacitor, and the capacitor is used to supply power to the electromagnetic coil.

[0114] Example 9:

[0115] This embodiment is a further refinement of embodiment 4:

[0116] To facilitate the configuration of the driver 12 and the matching relationship between the second connecting seat 11 and the fuse base, from the inner side to the outer side of the second connecting seat 11, the side plate 25 includes a first seat 13, a support shaft 16, a second seat 19 and a connecting pipe 28 that are connected in sequence and have a relatively fixed relationship. The fixed connection position of the connecting rod 24 on the side plate 25 is located on the first seat 13. Both the first seat 13 and the second seat 19 are structures that bulge outward relative to the side of the support shaft 16.

[0117] The second shaft hole 14, the third shaft hole 15, and the pin hole 17 are all provided on the first base 13. The second shaft hole 14 is a through hole or blind hole extending along the thickness direction of the first base 13. The third shaft hole 15 is an internal threaded hole extending along the thickness direction of the first base 13. The support shaft 16 and the second base 19 are both hollow structures with a central hole inside. The central holes of the support shaft 16 and the second base 19 are coaxial and interconnected. The pin hole 17 is interconnected with the central hole. The extension direction of the pin hole 17 is parallel to the axis of the central hole.

[0118] The pipe hole of the connecting pipe 28 is coaxial with the central hole and communicates with it. The connecting pipe 28 is a threaded pipe structure with connecting threads on the outside or a threaded pipe structure with connecting threads on the inside. The driver 12 is connected to the connecting pipe 28 through the connecting threads.

[0119] In this design, the first base 13, as the structure on the side plate 25 closest to the inner side of the second connecting seat 11, carries the second rotating shaft 5, the third rotating shaft 9, and the pin 20 through the second shaft hole 14, the third shaft hole 15, and the pin hole 17, respectively. The third shaft hole 15 is set as an internal thread hole, which aims to constrain the position of the swing arm 10 in the thickness direction of the first base 13 by using the third rotating shaft 9 with a stud and a nut. The second base 19 and the first base 13 form bosses located at different ends of the support shaft 16. For the groove formed on the base hook, the second base 19 and the first base 13 are used to constrain the support. The support shaft 16 is positioned along the length of the groove. Both the support shaft 16 and the second base 19 are hollow structures with the central hole and the pin hole 17 connected. This is intended to allow the structure formed by the moving iron core and the pin 20 to be guided into the inner side of the first base 13 through the central hole and the pin hole 17 after the electromagnetic actuator is connected by the connecting thread on the connecting pipe 28. The second base 19, located outside the support shaft 16, can be used to install the outer shell of the electromagnetic actuator. The cavity between the outer shell and the electromagnetic actuator is used to install the power supply module. Both the power supply module and the electromagnetic actuator are located inside the outer shell.

[0120] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific embodiments of the present invention are limited to these descriptions. For those skilled in the art, other embodiments derived without departing from the technical solution of the present invention should be included within the protection scope of the present invention.

Claims

1. A drop-out fuse actuator for smart grids, characterized in that, Includes a second connecting seat (11), on which a second shaft hole (14) or a second rotating shaft (5) is provided; A swing arm (10) is connected to the second connecting seat (11) via a third rotating shaft (9). One end of the swing arm (10) is provided with a mating pair (8) as a linkage component. It also includes a driver (12) mounted on a second connector (11), the driver (12) being configured with a pin (20) whose position can be changed under the action of the driver (12), the pin (20) being able to block the other end of the swing arm (10) and release the other end of the swing arm (10) in its movement trajectory.

2. The drop-out fuse actuator for smart grids according to claim 1, characterized in that, When the pin (20) blocks the swing arm (10), the lever arm between the pin (20) and the third pivot (9) on the swing arm (10) is longer than the lever arm between the mating pair (8) and the third pivot (9).

3. The drop-out fuse actuator for smart grids according to claim 1, characterized in that, The mating pair (8) is a meshing tooth (21) or tooth groove provided at the end of the swing arm (10).

4. The drop-out fuse actuator for smart grids according to claim 1, characterized in that, The second connecting seat (11) includes two side plates (25) arranged opposite each other, and the two side plates (25) are fixedly connected by a connecting rod (24); Each side plate (25) is provided with a support shaft (16), and the support shafts (16) on the two side plates (25) are coaxial; When the second connecting seat (11) is provided with a second shaft hole (14), both side plates (25) are provided with a second shaft hole (14). The second shaft holes (14) of the two side plates (25) are coaxial, and the axes of the second shaft hole (14), the support shaft (16), and the third rotating shaft (9) are parallel to each other. When the second connecting seat (11) is provided with the second rotating shaft (5), the different ends of the second rotating shaft (5) are supported on different side plates (25), and the axes of the second rotating shaft (5), the support shaft (16), and the third rotating shaft (9) are parallel to each other; A cavity is formed between the two side plates (25); At least one side plate (25) is provided with a third shaft hole (15) and a driver (12). The third shaft hole (15) serves as a shaft hole that mates with a third rotating shaft (9). The driver (12) is located on the outside of the side plate (25). The swing arm (10) is located on the inside of the side plate (25). The side plate (25) is provided with a pin hole (17) that slidably engages with a pin (20). The driver (12) is used to drive the pin (20) to slide along the length direction of the pin hole (17). The pin (20) passes through the side plate (25) through the pin hole (17).

5. The drop-out fuse actuator for smart grids according to claim 1, characterized in that, The second connecting seat (11) includes a side plate (25), on which a third shaft hole (15) and a driver (12) are disposed. The third shaft hole (15) serves as a shaft hole that cooperates with the third rotating shaft (9). The driver (12) is disposed on the outside of the side plate (25), and the swing arm (10) is disposed on the inside of the side plate (25). The side plate (25) is provided with a pin hole (17) that slides with the pin (20). The driver (12) is used to drive the pin (20) to slide along the length direction of the pin hole (17). The pin (20) passes through the side plate (25) through the pin hole (17). The end of the pin (20) near the inner side of the side plate (25) is an inclined end with a sloping face. The sloping face is such that when the pin (20) moves to the first position in the stroke under the action of the driver (12), the sloping end blocks the swing arm (10) through the bottom side of the sloping face; when the pin moves to the second position in the stroke under the action of the driver (12), the position on the sloping face used to block the swing arm (10) moves towards the top side of the sloping face, and the swing arm (10) is in a state supported by the sloping face.

6. The drop-out fuse actuator for smart grids according to claim 5, characterized in that, The inner side of the side plate (25) is provided with an arc-shaped sliding groove (18), the center of which is located on the axis of the third rotating shaft (9); It also includes a slider (23) fixed on the swing arm (10), the slider (23) being embedded and slidably fitted in the groove (18); When the pin moves to the second position on the stroke under the action of the driver (12), the slider (23) swings with the swing arm (10) to the end side supported by the slide groove (18).

7. The drop-out fuse actuator for smart grids according to claim 6, characterized in that, On the cross-section of the groove (18), the maximum width of the groove (18) is located inside the groove opening of the groove (18); The shape of the slider (23) is adapted to the groove (18). The groove (18) limits the position of the slider (23) in the depth direction of the groove (18) by constraining the surface of the slider (23) through its groove surface.

8. The drop-out fuse actuator for smart grids according to any one of claims 4 to 7, characterized in that, The driver (12) is an electromagnetic driver including an electromagnetic coil, a return spring and a moving iron core, and the pin (20) is fixedly connected to the moving iron core; When the electromagnetic coil is energized, the electromagnetic coil drives the pin (20) through the moving iron core to perform a retraction action to move outward to the side plate (25). Under the action of the driver (12), the pin moves to the second position on the stroke. When the electromagnetic coil is de-energized, the reset spring pushes the pin (20) or the moving iron core, causing the pin (20) to perform a feeding action to move inward to the side plate (25). Under the action of the driver (12), the pin moves to the first position on the stroke.

9. The drop-out fuse actuator for smart grids according to claim 8, characterized in that, It also includes a power supply module for supplying power to the electromagnetic coil, the power supply module including a battery and a capacitor, the battery being used to charge the capacitor and the capacitor being used to supply power to the electromagnetic coil.

10. The drop-out fuse actuator for smart grids according to claim 4, characterized in that, From the inside to the outside of the second connecting seat (11), the side plate (25) includes a first seat (13), a support shaft (16), a second seat (19) and a connecting pipe (28) that are connected in sequence and have a relatively fixed relationship. The fixed connection position of the connecting rod (24) on the side plate (25) is located on the first seat (13). Both the first seat (13) and the second seat (19) are structures that bulge outward relative to the side of the support shaft (16). The second shaft hole (14), the third shaft hole (15) and the pin hole (17) are all provided on the first seat (13). The second shaft hole (14) is a through hole or blind hole extending along the thickness direction of the first seat (13). The third shaft hole (15) is an internal threaded hole extending along the thickness direction of the first seat (13). The support shaft (16) and the second seat (19) are both hollow structures with a central hole inside. The central holes of the support shaft (16) and the second seat (19) are coaxial and connected. The pin hole (17) is connected to the central hole. The extension direction of the pin hole (17) is parallel to the axis of the central hole. The tube hole of the connecting tube (28) is coaxial with the central hole and communicates with each other. The connecting tube (28) is a threaded tube structure with connecting threads on the outside or a threaded tube structure with connecting threads on the inside. The driver (12) is connected to the connecting tube (28) through the connecting threads.

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