Cutout fuses for smart grids

Abstract

The present invention discloses a drop-out fuse for smart grid, which relates to the technical field of power distribution equipment, including a fuse tube and a first connection seat, and also including a second connection seat, the second connection seat is connected with a swing arm through a third rotating shaft, and one end of the swing arm is matched with the first connection seat through a matching pair; and also includes a driver installed on the second connection seat, the driver is equipped with a latch, and the latch can move to the swing track of the swing arm swinging around the third rotating shaft. When the latch blocks the other end of the swing arm, on the swing arm, the force arm between the latch and the third rotating shaft is longer than the force arm between the matching pair and the third rotating shaft. This scheme can effectively reduce the power consumption of the fuse when performing the opening action. At the same time, the corresponding actuator has a simple structure and can be directly installed on the fuse.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution equipment, and in particular to a drop-out fuse for a smart grid. Background Art

[0002] The power grid is an important basic industry for economic and social development and an important link in the national energy industry chain. In order to ensure the rapid and sustainable development of my country's energy, economy and society, it is necessary to propose a smart grid development model that meets my country's energy strategy and the needs of power grid companies. Smart grid refers to the intelligence of the power grid. It is based on an integrated, high-speed two-way communication network. Through the application of advanced measurement technology, advanced monitoring technology, advanced control methods, and advanced decision support system technology, it achieves the goals of reliable, safe, economical, efficient, environmentally friendly and safe use of the power grid.

[0003] The drop-out fuse is the most commonly used short-circuit protection switch for distribution line branches and distribution transformers. It is economical, easy to operate, and highly adaptable to outdoor environments. It is widely used in 10kV distribution lines and the primary side of distribution transformers for protection and equipment switching operations. The structure of the drop-out fuse includes a moving contact, a stationary contact, a fuse tube (fuse tube), etc. When the drop-out fuse is triggered and melted, the moving contact is separated from the stationary contact, and the fuse tube falls and swings, achieving the purpose of quickly cutting off the circuit.

[0004] The triggering of the common drop-out fuse disconnecting circuit depends on the melting of the fuse (fuse), and the action occurring on the fuse is: after the melt melts, the pulling effect of the melt on the fuse tube and the lower end bracket disappears, and the fuse tube flips under the action of its own weight and the upper end contact spring, and flips so that the lower end of the fuse tube is hooked in the groove of the base; if the fuse needs to be disconnected before the melt melts, personnel are generally required to arrive at the site and use an operating rod with a hook to pull down the operating ring installed on the upper end of the fuse tube. During this process, the upper end of the fuse tube pushes the contact spring through the contact sheet and further compresses the contact spring. After the contact sheet moves up, the upper end of the fuse tube slides out of the groove at the lower end of the contact sheet. After sliding out, the fuse tube flips so that the lower end is hooked in the groove of the base.

[0005] In order to realize the remote operation of opening and closing the fuse, the technical solutions disclosed in the prior art include the solutions provided by 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 performing remote operation is: using a motor as the power source of the actuator, and providing a push and pull force to the fuse tube under the action of the transmission parts on the actuator, so as to imitate the method of manually pushing and pulling the fuse tube to obtain the opening and closing action.

[0006] The drop-out fuse is an important component of the power grid. The good adaptability of the drop-out fuse to remote control can effectively promote the development of smart grid technology. Summary of the invention

[0007] In view of the problem of remote control of drop-out fuses, the present invention provides a drop-out fuse for smart grids. This solution can effectively reduce the power consumption of the fuse when performing the opening action. At the same time, the corresponding actuator has a simple structure and can be directly installed on the fuse.

[0008] In view of the above problems, the drop-out fuse for smart grid provided by the present invention solves the problems through the following technical points: the drop-out fuse for smart grid includes a fuse tube and a first connection seat, the tube seat of the fuse tube is hingedly connected to the first connection seat through a first rotating shaft, and also includes a second connection seat hingedly connected to the first connection seat through a second rotating shaft, the second connection seat is connected to a swing arm through a third rotating shaft, one end of the swing arm is matched with the first connection seat through a matching pair, the matching pair serves as a linkage component between the first connection seat and the swing arm, and the matching pair is used to realize: when the first connection seat flips around the second rotating shaft relative to the second connection seat, the first connection seat drives the swing arm to swing around the third rotating shaft through the matching pair;

[0009] The invention also includes a driver mounted on the second connecting seat, wherein the driver is provided with a latch that moves under the action of the driver, and the latch can move to a swinging track of the swing arm swinging around the third rotating axis, and the stroke of the latch movement satisfies:

[0010] When the latch is in the first position of the stroke, the latch forces the fuse tube to maintain a state where the upper end of the fuse tube matches the upper static contact of the drop-out fuse by blocking the other end of the swing arm;

[0011] When the latch is at the second position on the stroke, the swing arm swings on the basis of the first position state, and the swing direction of the swing arm satisfies: the swing arm releases the first connecting seat, so that the fuse tube and the first connecting seat are under the action of their own weight and / or the fuse tube and the first connecting seat are under the thrust of the upper static contact of the drop-out fuse on the upper moving contact of the fuse tube, the fuse tube rotates around the second rotating shaft synchronously with the first connecting seat, and the fuse tube obtains a drop action;

[0012] When the latch pin blocks the other end of the swing arm, on the swing arm, the force arm between the latch pin and the third rotating shaft is longer than the force arm between the matching pair and the third rotating shaft.

[0013] When the actuator of the existing drop-out fuse that can perform remote disconnection performs related actions, for the fuse disconnection action when the fuse is not blown, the fuse pulls the fuse tube and the connecting seat at the lower end to form an integral structure. The integral structure is a rigid structure clamped in the upper static contact and the lower base groove, that is, before disconnection, the integral structure is elastically clamped between the base and the contact piece. Therefore, this requires the motor to output sufficient torque to force the fuse tube to swing and break away from the constraint of the contact piece on its upper end. Problems that need to be solved include the on-site power supply problem of high-power motors. Since the actuator is large in size and requires a force-bearing structure located on the periphery of the fuse, 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 it also involves the problem of insulation isolation from surrounding electrical equipment. Based on this, this scheme aims to provide a technical solution that can effectively reduce the power consumption of the fuse when performing the opening action. At the same time, the corresponding actuator has a simple structure, does not require an external force-bearing structure, and can be directly configured on the fuse to solve the problem of reconfiguring the installation conditions on site and considering insulation isolation measures from surrounding electrical equipment.

[0014] In the present solution, the structure formed by the fuse tube, the first connecting seat and the tube seat is the structure commonly included in the existing drop-type fuse. Under normal use, the structure is pulled into a tensioned integral structure by the fuse arranged between the fuse tube and the first connecting seat. When the fuse blows, the fuse tube rotates around the first rotating axis and performs a drop action to cut off the circuit. On the basis of the prior art, the present invention connects the second connecting seat via the second rotating shaft on the first connecting seat, and arranges a swing arm on the second connecting seat via the third rotating shaft, configures a driver on the second connecting seat, configures a latch on the driver, and has a matching pair serving as a linkage component between the swing arm and the first connecting seat. In this way, the structure formed by the fuse tube, the first connecting seat, and the second connecting seat can be regarded as a three-link structure having the first rotating shaft and the second rotating shaft thereon. The relative rotation of the fuse tube and the first connecting seat is realized when the fuse is blown, and the relative rotation of the first connecting seat and the second connecting seat is realized when the latch allows the swing arm to swing further. When the drop-out fuse is in normal use, the second connecting seat can be rotatably supported in the groove of the drop-out fuse base, and the moving contact of the fuse tube cooperates with the static contact above it. When the driver configures the latch to be in the first position on its stroke, the latch plays a role in the The blocking effect of the swing arm rotating around the third rotating shaft, the other end of the swing arm prevents the first connecting seat and the second connecting seat from flipping relative to the second rotating shaft under the action of the matching pair, that is, in this state, the pin forces the first connecting seat and the second connecting seat to not rotate relative to each other, and the various components on the above three-link structure cannot swing so as to reduce the distance between the upper end of the fuse tube and the second rotating shaft. In this state, the above three-link mechanism is stably clamped between the groove and the upper end static contact, providing a structural basis for circuit connectivity for the circuit. When the pin moves to the second position on its stroke under the action of the driver, the original blocking effect is eliminated, and the state of the above three-link structure is broken under the self-weight of the fuse tube and the first connecting seat and the thrust of the static contact on the fuse tube. When the upper end of the fuse tube is out of the groove on the static contact, the above three-link structure swings freely. At this time, the fuse tube obtains a falling action, and the drop-type fuse performs a trip drop.

[0015] In summary, the difference from the prior art is that the present solution adds a second connection seat on the basis of the existing fuse tube connection seat (first connection seat), and whether the first connection seat and the second connection seat can swing depends on the position of the pin in its travel under the action of the driver. Therefore, when the present drop-out fuse needs to execute a control command to disconnect the circuit, it is only necessary to control the position of the pin in its movement stroke through the driver. Therefore, the present solution provides a drop-out fuse for a smart grid. At the same time, the present drop-out fuse can still perform the normal drop-out action of the fuse tube after the fuse is blown through the fuse connected between the first connection seat and the fuse tube.

[0016] The present invention is also different from the prior art in that, unlike the conventional fuse with an actuator, the present invention constrains the first connection seat and the second connection seat to a stable state (when the plug is in the first position) by means of the latch, the swing arm and the matching pair, and after the latch moves (when the latch is in the second position), the stable state is destroyed under the deadweight and thrust, and after the first connection seat and the second connection seat are flipped so that the fuse tube is disengaged from the groove on the static contact (after the structure formed by the first connection seat and the second connection seat is unstable, the second connection seat is flipped in the groove for the implementation method that the second connection seat can be flipped and connected in the groove of the base), the fuse tube moves with the first connection seat relative to the second connection seat. The connection seat is free to flip and fall (for the implementation method in which the second connection seat can be flipped and connected in the groove of the base, the second connection seat is also flipped and fell around the groove). Therefore, when this scheme realizes the opening action of non-fuse melting, it is not through the method of pushing and pulling the connection seat that the upper end of the fuse tube overcomes the obstruction of the static contact and then performs the falling action. The corresponding actuator (including the driver and the pin) is simpler in structure than the existing actuator, and there is no need to configure a force-bearing structure on the structure other than the movable part of the fuse, that is, the actuator can be directly installed on the second connection seat. Therefore, this scheme does not need to reconfigure the installation conditions on site for the force-bearing structure and consider insulation and isolation measures with surrounding electrical equipment.

[0017] The difference between the present scheme and the prior art also lies in that the pin in the present scheme provides an obstruction for the swing arm. If the swing arm is regarded as a lever with the third rotating shaft as the rotation fulcrum, 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 matching pair is the resistance arm. The pin is subjected to force 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 requirement for the driver to apply a force to the pin, thereby effectively reducing the power consumption of the fuse when performing a non-fuse melting and opening action, and facilitating the configuration of a power source for the driver.

[0018] As a person skilled in the art, in order to adapt to the need of fuse drop, the rotatable matching mode between the groove on the drop-out fuse base and the second connecting seat can also be realized by replacing the second connecting seat and the base with 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, and 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 and the upper end of the fuse tube When the moving contact cooperates with the static contact at the upper end of the drop-out type fuse, the pin is in the first position, and the cooperation between the support shaft and the groove can be achieved by rotatably connecting the support shaft to the axial hole of the base. When the pin moves to the second position, since the swing arm is allowed to rotate around the third rotating shaft, under the dead 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, eventually causing the fuse tube to fall out of the upper static contact, and the drop-out type fuse as a whole undergoes a free fall action.

[0019] In specific implementation, since the fuse tube usually needs to be installed with a certain angle to the vertical line of the ground and the upper end facing outward, when the support shaft is regarded as a reference point, it can be configured that the first rotating shaft and the second rotating shaft are both located on the outside of the support shaft. In order to increase the length of the power arm, the matching position of the swing arm and the pin is located on the inside of the support shaft. Preferably, in order to improve the falling efficiency of the fuse tube, the fuse tube swings outward quickly after the fuse is blown, and the overall structure formed by the first connecting seat and the fuse tube swings outward quickly under the corresponding gravity and thrust after the pin moves, and the center of gravity of the structure formed by the fuse tube and the seat body is located on the outside of the first rotating shaft, the center of gravity of the structure formed by the fuse tube, the seat body, and the first connecting seat is located on the outside of 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 on the outside of the support shaft. In this way, the swing direction of one end of the swing arm used to cooperate with the pin is the inward and outward direction, and the first position is located on the outside of the second position. Relative to the state in which the upper end of the fuse tube and the static contact are normally matched 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 synchronously around the second rotating shaft, and the second connecting seat swings inward around the support shaft. When the fuse tube is detached from the static contact, the corresponding swinging structure on the fuse swings freely to perform further falling action.

[0020] At the same time, as a person skilled in the art, the driver in this solution is used to change the position or posture of the bolt. The movement of the bolt under the action of the driver can be linear motion, swinging or other forms of motion. From the perspective of the simplicity of the actuator structure, the following driver is an electromagnetic driver.

[0021] As a further technical solution of the drop-out fuse:

[0022] As a specific implementation scheme of the mating pair, the mating pair includes meshing teeth and tooth grooves, one of the meshing teeth and the tooth groove is arranged on the swing arm, and the other is arranged on the first connecting seat, and the meshing teeth and the tooth groove form a tooth meshing relationship.

[0023] In the specific implementation of this scheme, for example, it is set that the meshing tooth is located at the end of the swing arm, and the tooth groove is located on the edge of the side panel body of the first connecting seat. The meshing tooth is embedded in the tooth groove. When the other end of the swing arm is locked by the pin, the matching relationship between the tooth groove and the meshing tooth constrains the first connecting seat and the second connecting seat to a state where they cannot rotate relative to each other. This scheme has a simple structure and is reliable in locking the first connecting seat by the swing arm.

[0024] As an alternative to the matching pair: a strip groove extending along the length direction of the swing arm is provided on the swing arm, and a boss is fixed on the first connecting seat, and the boss can be slidably matched in the strip groove. Through the mutual constraint between the side surface of the boss and the side surface of the strip groove, the boss slides in the length direction of the strip groove when the first connecting seat and the second connecting seat are relatively flipped, so as to achieve the purpose of the matching pair as a linkage component of the first connecting seat and the swing arm. This scheme is different from the above scheme of realizing linkage through tooth engagement. The scheme that is easy to implement is that the swing arm and the first connecting seat structure that carries the boss are stacked, which is not conducive to the thickness of the control fuse, and is not conducive to setting the first connecting seat and the second connecting seat to have matching surfaces that are in contact with each other, and setting the swing arm and the second connecting seat to have matching surfaces that are in contact with each other. The above matching surfaces that are in contact with each other are beneficial to the control of the motion trajectory accuracy of each part in the present scheme during relative motion. In addition, the strip groove can also be set on the first connecting seat, and the boss can be set on the swing arm. Alternatively, the swing arm may be rotatably connected to the first connecting seat via a rotating shaft, and a strip groove matching the third rotating shaft may be provided on the swing arm. This scheme may be implemented 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 latch may 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.

[0025] As an implementation method of the second connecting seat, the second connecting seat includes two side plates arranged opposite to each other, and the two side plates are fixedly connected by a connecting rod;

[0026] Each side plate is provided with a support shaft, and the support shafts on the two side plates are coaxial;

[0027] Each side plate is provided with a second shaft hole, the second shaft holes on the two side plates are coaxial, and the second shaft hole serves as a shaft hole matched with the second rotating shaft;

[0028] The first connecting seat is arranged in the cavity between the two side plates, and the side surface of the first connecting seat is in surface contact with the inner side surface of each side plate;

[0029] At least one side panel is provided with a third shaft hole and a driver, the third shaft hole serves as a shaft hole matched with the third rotating shaft, the driver is arranged on the outer side of the side panel, the swing arm is arranged on the inner side of the side panel, and the side panel is provided with a latch hole slidably matched with the latch, the driver is used to drive the latch to slide along the length direction of the latch hole, and the latch passes through the side panel through the latch hole.

[0030] The second connecting seat is constrained to form an integral structure by the connecting rod, and the support shaft serves as a structure for the second connecting seat to rotatably cooperate with the fuse base, so that support points for supporting the second connecting seat on the base are formed on both sides of the second connecting seat. The second axial hole on each side plate is the same as the support shaft, which is used to form a first connecting seat that can be rotatably connected to the second connecting seat on both sides through the second rotating shaft, and the first connecting seat is constrained in the cavity through the inner sides of the two side plates, so as to achieve the purpose of limiting the position of the first connecting seat on the axis of the second rotating shaft. The third axial hole is used to configure a swing arm on the inner side of the side plate, and the pin hole is used to configure a pin on the side plate. When only one side plate has the third axial hole and the driver, in order to use the pin to constrain the swing arm, the swing In order to realize the purpose of constraining the relative posture of the first connecting seat and the second connecting seat by the cooperation pair, the pin needs to be subjected to a larger positive pressure from the swing arm, which puts higher requirements on the ability of the driver to drive the pin to move. When the two side panels are configured with a third axial 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 ability of the driver to drive the pin to move is required to be lower at this time. Therefore, the better way is to configure the third axial hole and the driver on the two side panels, so that the number of drivers, latches and swing arms can be flexibly selected according to the specific application scenario or conditions, such as configuring the driver, latch and swing arm only for a single side panel, or configuring the driver, latch and swing arm for each side panel.

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

[0032] As an implementation scheme of the actuator for constraining the swing arm, the end of the pin close to the inner side of the side plate is a sloped end with an inclined end face, and the inclined surface is: when the pin moves to a first position in the stroke under the action of the driver, the sloped end blocks the swing arm through the bottom side of the slope; when the pin moves to a second position in the stroke under the action of the driver, the position on the slope used to block the swing arm moves toward the top side of the slope, and the swing arm is in a state of being supported by the slope.

[0033] In the above scheme, the end of the bolt close to the inner side of the side plate is the end of the bolt inserted into the second connecting seat, the first position is the position when the bolt is inserted deeper into the second connecting seat, and compared with the first position, the second position is the position where the bolt is inserted shallower into the second connecting seat. In this scheme, the matching positions of the swing arm and the bolt are both located on the inclined surface, so that the action of the bolt from the first position to the second position is the retreat of the bolt (movement toward the outside of the first connecting seat). After the retreat is completed, the blocking position of the bolt on the swing arm changes, so that the original stable state of the first connecting seat is broken, relative to the rotation with the second connecting seat. The upper end of the fuse tube is detached from the static contact. When the operating rod is used to reset the fuse tube, the opening swing of the first connection seat and the second connection seat around the second rotating shaft requires the swing arm to swing toward the bottom of the slope of the slope. In this process, the latch does not hinder the swing arm from swinging, and when the latch is equipped with a reset spring, the latch can automatically move to the first position, which can be realized after the upper end of the fuse tube and the groove embedded in the static contact, the latch automatically resets to the first position that maintains the relative stability of the first connection seat and the second connection seat. Therefore, the above scheme with a slope and supporting the swing arm by the slope can be used to complete the power-on reset of the fuse very conveniently. In specific implementation, if an electromagnetic driver is used as the driver, the first position is the relatively forward position to which the latch is pushed by the reset spring after the electromagnetic driver is powered off, and the second position is the relatively backward position to which the latch follows the moving iron core after the electromagnetic driver is powered on, but in these two positions, the swing arm is kept supported by the inclined surface at the end of the latch.

[0034] As a more specific implementation of the second connecting seat, an arc-shaped slide groove is provided on the inner side surface of the side plate provided with the third shaft hole, and the center of the slide groove is located on the axis of the third rotating shaft;

[0035] It also includes a sliding block fixed on the swing arm, wherein the sliding block is embedded in and slidably matched in the sliding groove;

[0036] When the latch moves to the second position on the stroke under the action of the driver, the slider swings along with the swing arm to the end side surface supported on the slide slot.

[0037] In this solution, when the swing arm rotates with the first connecting seat under the linkage action of the matching pair, the slider slides in the slide groove. For the position where the inclined surface on the inclined surface is used to support the pin, when the slider swings with the swing arm to the end side supported on the slide groove, the swing arm can no longer swing forward. Therefore, this solution can utilize the support provided by the slide groove end for the slider to optimize the force of the actuator, so as to achieve the purpose of ensuring the reliability of the moving parts of this solution; on the other hand, the actuator including the electromagnetic drive can be an externally purchased mechanism. When it has the slide groove, the slide groove is used to limit the stop point position of the swing arm. From the perspective of preventing the swing arm from swinging over the pin, this solution does not rely on the special selection of the actuator or the customization of a dedicated actuator, so this solution is also easy to implement.

[0038] As a more specific implementation of the second connecting seat, in the cross section of the slide groove, the maximum width position of the slide groove is located on the inner side of the notch of the slide groove;

[0039] The shape of the slider is adapted to the slide groove, and the slide groove limits the position of the slider in the depth direction of the slide groove by constraining the slide groove surface.

[0040] The present scheme is: utilizing the maximum position of the groove width of the slide groove to be located on the inner side of its groove opening, and utilizing a slider that matches the cross-sectional shape of the slide groove, so that the slider located in the slide groove can be limited in the depth direction of the slide groove. In this way, if the slide groove is set to start from the surface of the side plate, when the slider is embedded in the slide groove from the end position of the open end of the slide groove, the side plate limits the position of the swing arm on the third shaft through the slide groove. For the swing arm, the third shaft is set at one end of the swing arm close to the mating pair, and the slider is set at the other end of the swing arm. Such a swing arm constraint method is beneficial to the position stability of the swing arm relative to the side plate.

[0041] As a specific implementation of the driver, the driver is an electromagnetic driver including an electromagnetic coil, a return spring and a moving iron core, and the latch is fixedly connected to the moving iron core;

[0042] When the electromagnetic coil is energized, the electromagnetic coil drives the latch through the moving iron core to perform a retracting action to move outward of the side plate, and the latch moves to the second position on the stroke under the action of the driver;

[0043] When the electromagnetic coil loses power, the reset spring pushes the latch or the moving iron core, so that the latch performs a feeding action to move inwardly of the side plate, and the latch moves to the first position on the stroke under the action of the driver;

[0044] 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.

[0045] In the present solution, the electromagnetic coil and the return spring are both used to act on the latch, specifically: when the electromagnetic coil is energized, it is used to convert the position of the latch from the first position to the second position so that the swing arm releases the constraint on the first connecting seat; when the electromagnetic coil is de-energized, the return spring converts 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 static contact, the relative angle between the first connecting seat and the second connecting seat is maintained. Therefore, in the present solution, when the state of the fuse needs to be remotely controlled, it is only necessary to briefly power the electromagnetic coil, which can effectively reduce the power consumption during normal operation of the fuse; as a technician in this field, the fuse disconnection circuit when the fuse is not blown is generally used to deal with emergency situations, so the fuse does not need to consume higher power during normal operation. Based on this, the present 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 the electromagnetic coil with sufficient power output when needed.

[0046] In order to facilitate the configuration of the driver and the matching relationship between the second connection seat and the fuse base, from the inside to the outside of the second connection seat, the side plate includes a first seat body, a support shaft, a second seat body and a connecting pipe that are sequentially connected and have a relatively fixed relationship, and the fixed connection position of the connecting rod on the side plate is located on the first seat body, and the first seat body and the second seat body are both structures that are convex relative to the side of the support shaft;

[0047] The second shaft hole, the third shaft hole and the pin hole are all arranged on the first seat body, the second shaft hole is a through hole or a blind hole extending along the thickness direction of the first seat body, the third shaft hole is an internal threaded hole extending along the thickness direction of the first seat body, the support shaft and the second seat body are both hollow structures with a center hole arranged inside, the center holes of the support shaft and the second seat body are coaxial and connected, the pin hole is connected with the center hole, and the extension direction of the pin hole is parallel to the axis of the center hole;

[0048] The tube hole of the connecting tube is coaxial with the central hole and communicates with each other. The connecting tube is a threaded tube structure with a connecting thread on the outside or a threaded tube structure with a connecting thread on the inside.

[0049] In this scheme, the first seat body is the structure closest to the inner side of the second connecting seat on the side plate, and carries the second rotating shaft, the third rotating shaft and the latch through the second shaft hole, the third shaft hole and the latch hole respectively. The third shaft hole is set as an internal threaded hole, aiming to utilize the third rotating shaft with a stud and a nut to constrain the position of the swing arm in the thickness direction of the first seat body. The second seat body and the first seat body form bosses located at different ends of the support shaft. For the groove formed on the base hook, the second seat body and the first seat body are utilized to constrain the position of the support shaft in the length direction of the groove. The support shaft and the second seat body are both hollow structures, and the center hole and the latch hole are connected, aiming to achieve: when the electromagnetic driver is connected using the connecting thread on the connecting pipe, the structure formed by the moving iron core and the latch can be introduced into the inner side of the first seat body through the center hole and the latch hole; for the second seat body located outside the support shaft, it can be used to install the outer cover shell outside the electromagnetic driver, and the cavity between the outer cover shell and the electromagnetic driver is used to install the power supply module, and the power supply module and the electromagnetic driver are both located on the inner side of the outer cover shell.

[0050] As an implementation method for disposing the melt on the first connection seat, it also includes a push plate that is rotatable relative to the first connection seat, and also includes an elastic member with one end acting on the first connection seat and the other end acting on the push plate;

[0051] By rotating the push plate relative to the first connecting seat, the free end of the push plate can be turned over to the position of the lower end opening of the fuse tube, and the elastic member undergoes compression elastic deformation at this position.

[0052] In the present solution, the elastic member serves as a flipping and resetting structure of the push plate. When in use, the melt stretched and tightened between the upper end of the fuse tube and the first connecting seat is supported on the free end of the push plate. Since the elastic member is compressed and elastically deformed at this position, the free end of the push plate provides a thrust for the melt at the lower end of the fuse tube (the end close to the first connecting seat). When the melt is in the process of melting, when the melt is not completely melted and the pulling force that the melt can withstand is less than the pulling force generated by the push plate on the melt, the melt can be quickly broken under the action of the push plate, thereby achieving the purpose of improving the melt switching response speed.

[0053] As a technical solution with a simple structure, convenient assembly of elastic parts and good constraint of the push plate on the melt, the push plate is fitted on the second rotating shaft through the shaft hole clearance thereon, and the elastic part is a torsion spring sleeved on the second rotating shaft;

[0054] When the free end of the push plate flips to the position of the hole at the lower end of the fuse tube, the free end covers the side of the hole close to the first connecting seat;

[0055] The plate body of the push plate supporting the free end is a V-shaped plate body, the groove on the plate body is located on the side of the plate body away from the orifice, one end of the groove intersects with the edge of the free end close to the center of the orifice, and the groove on the push plate extends along the center line of the plate body toward the side where the second rotating shaft is located.

[0056] In this scheme, the push plate can be configured to have two ear plates located at the rear side of the push plate and a support plate located at the front side of the push plate, the V-shaped plate body is the support plate, the two ear plates are arranged opposite to each other, each ear plate of the push plate has an axial hole and the axial holes on the two ear plates are coaxial, the second rotating shaft serves as the installation base of the elastic member of the torsion spring, one end of the torsion spring is hooked on the first connecting seat, and the other end of the torsion spring is hooked on the push plate, after the melt is led out from the lower end of the fuse tube, it extends to the first connecting seat along the length direction of the groove on the V-shaped plate body and is fixed On the first connecting seat, this solution is adopted, such as one end of the melt is fixed on the clamping nut of the first connecting seat and passes through the groove, and the other end is fixed on the moving contact at the upper end of the fuse tube. The elastically supported push plate can not only tension the melt to maintain a stable structure between the fuse tube and the first connecting seat, but also, while the push plate maintains a rapid action to break the melt, the groove can improve the stability of the cooperation state between the melt and the push plate, thereby avoiding abnormal operation of the fuse due to the detachment of the melt from the push plate during normal use.

[0057] The present invention has the following beneficial effects:

[0058] This solution improves the structure of the drop-out type fuse to provide a method for effectively reducing the power consumption of the fuse when performing the opening action. At the same time, the corresponding actuator has a simple structure, does not require an external force-bearing structure, and can be directly configured on the fuse, so as to solve the technical solution in the prior art that requires adding an actuator, reconfiguring the installation conditions on site, and considering the insulation isolation measures with surrounding electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 This is a structural schematic diagram of a specific embodiment of the drop-out fuse for smart grid described in this solution. This schematic diagram is a partial structural schematic diagram. In order to facilitate the display of structural features, the base, upper static contact and fuse are not shown;

[0060] Figure 2 The schematic diagram of the structure of a specific embodiment of the drop-out fuse for smart grid described in this solution is Figure 1 Differently, the structural diagram includes a melt;

[0061] Figure 3 This is a structural schematic diagram of a side plate in a specific embodiment of the drop-out fuse for smart grid described in this solution;

[0062] Figure 4 FIG. 1 is a schematic diagram of the structure of the side plate in a specific embodiment of the drop-out fuse for smart grid described in the present invention, and FIG. Figure 3 There is a difference, the latch is shown in this schematic diagram;

[0063] Figure 5 A schematic diagram of the structure of a swing arm in a specific embodiment of the drop-out fuse for a smart grid described in this solution;

[0064] Figure 6 This is a schematic structural diagram of a second connecting socket in a specific embodiment of the drop-out fuse for smart grid described in this solution.

[0065] The reference numerals in the accompanying drawings are respectively: 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, matching 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, supporting shaft, 17, pin hole, 18, slide groove, 19, second seat body, 20, pin, 21, meshing teeth, 22, first shaft hole, 23, slider, 24, connecting rod, 25, side plate, 26, groove, 27, melt, 28, connecting tube. DETAILED DESCRIPTION

[0066] The present invention is further described in detail below in conjunction with embodiments, but the present invention is not limited to the following embodiments:

[0067] Embodiment 1:

[0068] like Figures 1 to 6 As shown, a drop-out fuse for a smart grid comprises a fuse tube 1 and a first connection seat 4, wherein the tube seat 2 of the fuse tube 1 is hingedly connected to the first connection seat 4 via a first rotating shaft 3, and further comprises a second connection seat 11 hingedly connected to the first connection seat 4 via a second rotating shaft 5, wherein a swing arm 10 is connected to the second connection seat 11 via a third rotating shaft 9, wherein one end of the swing arm 10 is matched with the first connection seat 4 via a matching pair 8, wherein the matching pair 8 serves as a linkage component between the first connection seat 4 and the swing arm 10, and the matching pair 8 is used to realize that when the first connection seat 4 flips around the second rotating shaft 5 relative to the second connection seat 11, the first connection seat 4 drives the swing arm 10 to swing around the third rotating shaft 9 via the matching pair 8;

[0069] The drive 12 is mounted on the second connection seat 11, and the drive 12 is provided with a latch 20 that moves under the action of the drive 12. The latch 20 can move to the swing track of the swing arm 10 swinging around the third rotating shaft 9, and the movement stroke of the latch 20 satisfies:

[0070] When the latch 20 is at the first position on the stroke, the latch 20 blocks the other end of the swing arm 10, forcing the fuse tube 1 to maintain a state in which the upper end of the fuse tube 1 is matched with the upper static contact of the drop-out fuse;

[0071] When the latch 20 is at the second position on the stroke, the swing arm 10 swings on the basis of the first position state, and the swing direction of the swing arm 10 satisfies: the swing arm 10 releases the first connection seat 4, so that the fuse tube 1 and the first connection seat 4 are under the action of their own weight and / or the fuse tube 1 and the first connection seat 4 are under the thrust of the upper static contact of the drop-out fuse on the upper moving contact of the fuse tube 1, the fuse tube 1 rotates around the second rotating shaft 5 synchronously with the first connection seat 4, and the fuse tube 1 obtains a drop action;

[0072] When the latch 20 blocks the other end of the swing arm 10 , on the swing arm 10 , the force arm between the latch 20 and the third rotating shaft 9 is longer than the force arm between the matching pair 8 and the third rotating shaft 9 .

[0073] When the actuator of the existing drop-out fuse capable of performing remote disconnection performs relevant actions, for the fuse disconnection action when the fuse 27 is not blown, the fuse 27 pulls the fuse tube 1 and the connecting seat at the lower end to form an integral structure. The integral structure is a rigid structure clamped in the upper static contact and the lower base groove, that is, before disconnection, the integral structure is elastically clamped between the base and the contact piece. Therefore, this requires the motor to output sufficient torque to force the fuse tube 1 to swing and break away from the constraint of the contact piece on its upper end. Problems that need to be solved include the on-site power supply problem of a large-power motor. Since the actuator is large in size and requires a force-bearing structure located on the periphery of the fuse, 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 it also involves the problem of insulation and isolation from the surrounding electrical equipment. Based on this, this scheme aims to provide a technical solution that can effectively reduce the power consumption of the fuse when performing the opening action. At the same time, the corresponding actuator has a simple structure, does not require an external force-bearing structure, and can be directly configured on the fuse to solve the problem of reconfiguring the installation conditions on site and considering insulation isolation measures from surrounding electrical equipment.

[0074] In this solution, the structure formed by the fuse tube 1, the first connecting seat 4 and the tube seat 2 is the structure commonly included in the existing drop-out type fuse. Under normal use, the structure is pulled into a tensioned integral structure by the fuse 27 arranged between the fuse tube 1 and the first connecting seat 4. When the fuse 27 is blown, the fuse tube 1 rotates around the first rotating shaft 3 and performs a drop action to cut off the circuit. On the basis of the prior art, the present invention connects the second connecting seat 11 to the first connecting seat 4 through the second rotating shaft 5, and arranges a swing arm 10 on the second connecting seat 11 through the third rotating shaft 9, configures a driver 12 on the second connecting seat 11, configures a latch 20 on the driver 12, and has a matching pair 8 serving as a linkage component between the swing arm 10 and the first connecting seat 4. In this way, the structure formed by the fuse tube 1, the first connecting seat 4, and the second connecting seat 11 can be regarded as a three-link structure having the first rotating shaft 3 and the second rotating shaft 5 thereon. The relative rotation of the fuse tube 1 and the first connecting seat 4 is realized when the fuse 27 is blown, and the relative rotation of the first connecting seat 4 and the second connecting seat 11 is realized when the latch 20 allows the swing arm 10 to swing further. When the drop-out fuse is in normal use, the second connecting seat 11 can be rotatably supported in the groove of the drop-out fuse base, and the moving contact of the fuse tube 1 cooperates with the static contact above it. When the driver 12 configures the latch 20 to be in the first position on its stroke, When the first connecting seat 4 and the second connecting seat 11 are in the state, the first connecting seat 4 and the second connecting seat 11 are prevented from turning relative to the second rotating shaft 5. That is, in this state, the first connecting seat 4 and the second connecting seat 11 cannot rotate relative to each other, and the components on the above three-link structure cannot swing so as to reduce the distance between the upper end of the fuse tube 1 and the second rotating shaft 5. In this state, the above three-link mechanism 24 is stably clamped between the groove and the upper static contact, providing a structural basis for circuit connection for the circuit. When the pin 20 moves to the second position on its stroke under the action of the driver 12, the original blocking effect is eliminated. Under the self-weight of the fuse tube 1 and the first connecting seat 4 and the thrust of the static contact on the fuse tube 1, the state of the above three-link structure is broken. When the upper end of the fuse tube 1 is released from the groove on the static contact, the above three-link structure swings freely. At this time, the fuse tube 1 obtains a falling action, and the drop-out fuse performs a gate opening drop.

[0075] In summary, the difference from the prior art is that the present solution adds a second connection seat 11 on the basis of the existing fuse tube 1 connection seat (first connection seat 4), and whether the first connection seat 4 and the second connection seat 11 can swing depends on the position of the pin 20 in its travel under the action of the driver 12. Therefore, when the present drop-out fuse needs to execute a control command to disconnect the circuit, it is only necessary to control the position of the pin 20 in its movement stroke through the driver 12. Therefore, the present solution provides a drop-out fuse for a smart grid. At the same time, the present drop-out fuse can still perform the normal drop-out action of the fuse tube 1 after the fuse 27 is blown through the fuse 27 connected between the first connection seat 4 and the fuse tube 1.

[0076] The present invention is also different from the prior art in that, unlike the conventional fuse with an actuator, the present invention constrains the first connection seat 4 and the second connection seat 11 to a stable state (when the plug 20 is in the first position) by means of the latch 20, the swing arm 10 and the matching pair 8, and after the plug 20 moves (when the plug 20 is in the second position), the stable state is destroyed under the deadweight and thrust, and after the first connection seat 4 and the second connection seat 11 are flipped so that the fuse tube 1 is disengaged from the groove on the static contact (after the structure formed by the first connection seat 4 and the second connection seat 11 is unstable, the second connection seat 11 can be flipped and connected in the groove of the base, and the second connection seat 11 is flipped in the groove), the fuse tube 1 moves with the first connection seat 4 Compared with the free flipping and falling of the second connecting seat 11 (for the implementation method in which the second connecting seat 11 can be flipped and connected in the groove of the base, it is also accompanied by the flipping and falling of the second connecting seat 11 around the groove), when the present scheme realizes the opening action of the non-fuse 27, it does not perform the falling action after the upper end of the fuse tube 1 overcomes the obstruction of the static contact by pushing and pulling the connecting seat. The corresponding actuator (including the driver 12 and the plug 20) is simpler in structure than the existing actuator, and there is no need to configure a force-bearing structure on the structure other than the movable part of the fuse, that is, the actuator can be directly installed on the second connecting seat 11. Therefore, the present scheme does not need to reconfigure the installation conditions on site for the force-bearing structure and consider the insulation isolation measures with the surrounding electrical equipment.

[0077] The difference between the present solution and the prior art also lies in that: in the present solution, the latch 20 provides an obstruction for the swing arm 10. If the swing arm 10 is regarded as a lever with the third rotating shaft 9 as the rotation fulcrum, the force arm between the latch 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 matching pair 8 is the resistance arm. The latch 20 is subjected to force 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 latch 20 is subjected to a smaller force from the swing arm 10, which can effectively reduce the requirement for the force applied to the latch 20 by the driver 12, thereby effectively reducing the power consumption of the fuse when executing the non-fuse 27 melting and opening action, and facilitating the configuration of a power source for the driver 12.

[0078] As a person skilled in the art, in order to adapt to the need of fuse drop, the rotatable matching mode between the groove on the drop-out fuse base and the second connecting seat 11 can also be realized by replacing the second connecting seat 11 with the base through 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, and 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, the upper end of the fuse tube 1 When the moving contact cooperates with the static contact at the upper end of the drop-out fuse, the pin 20 is in the first position, and the cooperation between the support shaft 16 and the groove can be achieved by rotatably connecting the support shaft 16 to the axial hole of the base. When the pin 20 moves to the second position, since the swing arm 10 is allowed to rotate around the third rotating shaft 9, under the dead 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, which eventually causes the fuse tube 1 to fall out of the upper static contact, and the drop-out fuse as a whole undergoes a free fall action.

[0079] In specific implementation, since the fuse tube 1 usually needs to be installed with a certain angle to the vertical line of the ground and the upper end faces outward, when the support shaft 16 is regarded as a reference point, it can be configured that the first rotating shaft 3 and the second rotating shaft 5 are both located on the outside of the support shaft 16. In order to increase the length of the power arm, the matching position of the swing arm 10 and the latch 20 is located on the inside of the support shaft 16. Preferably, in order to improve the falling efficiency of the fuse tube 1, the fuse tube 1 quickly swings outward after the melt 27 is melted, and after the latch 20 moves, under the corresponding gravity and thrust, the overall structure formed by the first connecting seat 4 and the fuse tube 1 quickly swings outward, and the center of gravity of the structure formed by the fuse tube 1 and the seat body is located on the outside of the first rotating shaft 3, the center of gravity of the structure formed by the fuse tube 1, the seat body, and the first connecting seat 4 is located on the outside of 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 latch 20, and the swing arm 10 and the driver 12 is located on the support shaft. 16, so that the swing direction of the end of the swing arm 10 used to cooperate with the plug 20 is the inward and outward direction, the first position is located on the outside of the second position, relative to the state in which the upper end of the fuse tube 1 and the static contact normally cooperate in the first position, when the plug 20 moves to the second position (the lower end of the plug 20 swings inward), the fuse tube 1 and the first connecting seat 4 swing outward synchronously around the second rotating shaft 5, and the second connecting seat 11 swings inward around the support shaft 16. When the fuse tube 1 is detached from the static contact, the corresponding swing structure on the fuse swings freely to perform further falling action.

[0080] At the same time, as a person skilled in the art, the driver 12 in this solution is used to change the position or posture of the pin 20. The movement 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 driver 12 is an electromagnetic driver 12.

[0081] Embodiment 2:

[0082] This embodiment is further refined on the basis of embodiment 1:

[0083] As a specific implementation scheme of the mating pair 8, the mating pair 8 includes meshing teeth 21 and tooth grooves, one of the meshing teeth 21 and the tooth groove is arranged on the swing arm 10, and the other is arranged on the first connecting seat 4, and the meshing teeth 21 and the tooth groove form a tooth meshing relationship.

[0084] In the specific implementation of this scheme, for example, it is set that the meshing tooth 21 is located at the end of the swing arm 10, and the tooth groove is located on the edge of the side panel body of the first connecting seat 4. The meshing tooth 21 is embedded in the tooth groove. When the other end of the swing arm 10 is locked by the pin 20, the matching relationship between the tooth groove and the meshing tooth 21 constrains the first connecting seat 4 and the second connecting seat 11 to a state where they cannot rotate relative to each other. This scheme has a simple structure and is reliable in locking the first connecting seat 4 by the swing arm 10.

[0085] As an alternative to the mating pair 8: a strip groove extending along the length direction of the swing arm 10 is provided on the swing arm 10, and a boss is fixed on the first connecting seat 4, and the boss can be slidably fitted in the strip groove. Through the mutual constraint between the side surface of the boss and the side surface of the strip groove, the boss slides in the length direction of the strip groove when the first connecting seat 4 and the second connecting seat 11 are relatively flipped, so as to achieve the purpose of the mating pair 8 as a linkage component between the first connecting seat 4 and the swing arm 10. This scheme is different from the above scheme of realizing linkage through tooth engagement. The scheme that is easy to implement is that the swing arm 10 and the first connecting seat 4 carrying the boss are stacked, which is not conducive to controlling the thickness of the fuse, and is not conducive to setting the first connecting seat 4 and the second connecting seat 11 to have mating surfaces that are in contact with each other, and setting the swing arm 10 and the second connecting seat 11 to have mating surfaces that are in contact with each other. The above mating surfaces that are in contact with each other are beneficial to the precision control of the motion trajectory of each part in this scheme during relative motion. Alternatively, the strip groove may be provided on the first connection seat 4, and the boss may be provided on the swing arm 10. Alternatively, the swing arm 10 may be provided so as to be rotationally connected to the first connection seat 4 via a rotating shaft, and a strip groove matching the third rotating shaft 9 may be provided on the swing arm 10, that is, when the first connection seat 4 is flipped relative to the second connection seat 11, the swing arm 10 rotates and slides around the third rotating shaft 9 on the second connection seat 11 to realize the scheme, and matching the scheme, the latch 20 may constrain the swing angle of the swing arm 10 on the second connection seat 11, that is, the swing arm 10 has different swing angles in the first position and the second position.

[0086] Embodiment 3:

[0087] This embodiment is further refined on the basis of embodiment 1:

[0088] As an implementation mode of the second connecting seat 11, the second connecting seat 11 includes two side plates 25 arranged opposite to each other, and the two side plates 25 are fixedly connected by a connecting rod 24;

[0089] A support shaft 16 is provided on each side plate 25, and the support shafts 16 on the two side plates 25 are coaxial;

[0090] Each side plate 25 is provided with a second shaft hole 14. The second shaft holes 14 on the two side plates 25 are coaxial. The second shaft hole 14 serves as a shaft hole matched with the second rotating shaft 5.

[0091] The first connection seat 4 is disposed in the cavity between the two side plates 25, and the side surface of the first connection seat 4 is in contact with the inner side surface of each side plate 25;

[0092] At least one side plate 25 is provided with a third axial hole 15 and a driver 12. The third axial hole 15 serves as an axial hole matched with the third rotating shaft 9. The driver 12 is arranged on the outer side of the side plate 25, and the swing arm 10 is arranged on the inner side of the side plate 25. The side plate 25 is provided with a latch hole 17 that slidably cooperates with the latch 20. The driver 12 is used to drive the latch 20 to slide along the length direction of the latch hole 17, and the latch 20 passes through the side plate 25 through the latch hole 17.

[0093] In this scheme, the second connecting seat 11 is constrained to form an integral structure through the connecting rod 24, and the support shaft 16 serves as a structure for the second connecting seat 11 to rotatably cooperate with the fuse base, so that support points for supporting the second connecting seat 11 on the base are formed on both sides of the second connecting seat 11. Similar to the support shaft 16, the second axial hole 14 on each side plate 25 is used to form a rotatable connection between the first connecting seat 4 and the second connecting seat 11 on both sides through the second rotating shaft 5, and the first connecting seat 4 is constrained in the cavity through the inner side of the two side plates 25, so as to achieve the purpose of limiting the position of the first connecting seat 4 on the axis of the second rotating shaft 5. The third axial hole 15 is used to configure the swing arm 10 on the inner side of the side plate 25, and the pin hole 17 is used to configure the pin 20 on the side plate 25. When only one side plate 25 has the third axial hole 15 and the driver 12, in order to use the pin 20 to constrain the swing arm 10, the swing arm 10 is In order to cooperate with the pair 8 to constrain the relative posture of the first connecting seat 4 and the second connecting seat 11, the pin 20 needs to be subjected to a larger positive pressure from the swing arm 10. At this time, higher requirements are placed on the ability of the driver 12 to drive the pin 20 to move. When the two side plates 25 are configured to have the third axial hole 15 and the driver 12, the force loaded by 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 to move is lower at this time. Therefore, a better way is to configure the third axial hole 15 and the driver 12 on the two side plates 25, so that the number of drivers 12, pins 20 and swing arms 10 can be flexibly selected according to the specific application scenario or conditions, such as only configuring the driver 12, pins 20 and swing arms 10 for a single side plate 25, or configuring the driver 12, pins 20 and swing arms 10 for each side plate 25.

[0094] It is easy to understand that if the axial directions of the second rotating shaft 5, the third rotating shaft 9 and the supporting shaft 16 are along the front-to-back direction, the swinging direction of the swing arm 10 is left-to-right direction. In order to enable the latch 20 to change the restraining state of the swing arm 10 at different positions, the latch 20 can move forward and backward. A simple structural form is that the latch hole 17 extends along the front-to-back direction, and the driver 12 drives the latch 20 to move in the front-to-back direction.

[0095] Embodiment 4:

[0096] This embodiment is further refined on the basis of Embodiment 3:

[0097] As an implementation scheme of the actuator for constraining the swing arm 10, the end of the pin 20 close to the inner side of the side plate 25 is a bevel end with an inclined surface, and the inclined surface is: when the pin 20 moves to the first position in the stroke under the action of the driver 12, the bevel 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 slope used to block the swing arm 10 moves toward the top side of the slope, and the swing arm 10 is in a state of being supported by the slope.

[0098] In the above scheme, the end of the latch 20 close to the inner side of the side plate 25 is the end of the latch 20 inserted into the second connecting seat 11, the first position is the position when the latch 20 is inserted deeper into the second connecting seat 11, and compared with the first position, the second position is the position where the latch 20 is inserted shallower into the second connecting seat 11. In this scheme, the matching positions of the swing arm 10 and the latch 20 are both located on the inclined surface. In this way, the action of the latch 20 from the first position to the second position is the retreat of the latch 20 (movement toward the outside of the first connecting seat 4). After the retreat is completed, the blocking position of the latch 20 on the swing arm 10 changes, so that the original stable state of the first connecting seat 4 is broken. Compared with the second connecting seat 1 After the rotation of the fuse tube 1, the upper end of the fuse tube 1 is separated from the static contact. When the operating rod is used to reset the fuse tube 1, the first connection seat 4 and the second connection seat 11 are opened and swung around the second rotation axis 5, which requires the swing arm 10 to swing toward the bottom of the slope. In this process, the latch 20 does not hinder the swing of the swing arm 10, and when a reset spring is configured for the latch 20, the latch 20 can automatically move to the first position, so that after the upper end of the fuse tube 1 is embedded in the groove of the static contact, the latch 20 automatically resets to the first position that maintains the relative stability of the first connection seat 4 and the second connection seat 11. Therefore, the scheme of having an inclined surface and supporting the swing arm 10 by the inclined surface can be adopted to complete the power-on reset of the fuse very conveniently. In a specific implementation, if an electromagnetic driver 12 is used as the driver 12, the first position is a relatively forward position to which the latch 20 is pushed by the reset spring after the electromagnetic driver 12 is powered off, and the second position is a relatively backward position to which the latch 20 retreats with the moving iron core after the electromagnetic driver 12 is powered on. However, in these two positions, the swing arm 10 is maintained in a state of being supported by the inclined surface at the end of the latch 20.

[0099] Embodiment 5:

[0100] This embodiment is further refined on the basis of Embodiment 4:

[0101] As a more specific implementation of the second connecting seat 11, an arc-shaped slide groove 18 is provided on the inner side surface of the side plate 25 provided with the third shaft hole 15, and the center of the slide groove 18 is located on the axis of the third rotating shaft 9;

[0102] It also includes a slider 23 fixed on the swing arm 10, and the slider 23 is embedded and slidably matched in the slide groove 18;

[0103] When the latch 20 moves to the second position on the stroke under the action of the driver 12 , the slider 23 swings along with the swing arm 10 to the end side supported by the slide slot 18 .

[0104] In this solution, when the swing arm 10 rotates with the first connecting seat 4 under the linkage action of the matching pair 8, the slider 23 slides in the slide groove 18. For the position where the inclined surface on the inclined surface is 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 solution can use the support provided by the end of the slide groove 18 for the slider 23 to optimize the force of the actuator, so as to achieve the purpose of ensuring the reliability of the action parts of this solution; on the other hand, the actuator including the electromagnetic drive can be an outsourced mechanism. When it has the slide groove 18, the slide groove 18 is used to limit the stop point position of the swing of the swing arm 10. From the perspective of preventing the swing arm 10 from swinging over the pin 20, this solution does not rely on the special selection of the actuator or the customization of a dedicated actuator, so this solution is also easy to implement.

[0105] Embodiment 6:

[0106] This embodiment is further refined on the basis of Embodiment 5:

[0107] As a more specific implementation of the second connecting seat 11, in the cross section of the slide slot 18, the maximum slot width position of the slide slot 18 is located on the inner side of the notch of the slide slot 18;

[0108] The shape of the slider 23 is adapted to the slide groove 18 , and the slide groove 18 limits the position of the slider 23 in the depth direction of the slide groove 18 by constraining the slide groove 18 on the surface of the slider 23 .

[0109] This solution is: the maximum position of the groove width of the slide groove 18 is located on the inner side of its groove opening, and a slider 23 adapted to the cross-sectional shape of the slide groove 18 is used, so that the slider 23 located in the slide groove 18 can be limited in the depth direction of the slide groove 18. In this way, if the slide groove 18 is set to start from the surface of the side plate 25, when the slider 23 is embedded in the slide groove 18 from the end position of the open end of the slide groove 18, the side plate 25 limits the position of the swing arm 10 on the third rotating shaft 9 through the slide groove 18. For the swing arm 10, the third rotating shaft 9 is set at one end of the swing arm 10 close to the mating pair 8, and the slider 23 is set at the other end of the swing arm 10. Such a swing arm 10 constraint method is beneficial to the position stability of the swing arm 10 relative to the side plate 25.

[0110] Embodiment 7:

[0111] This embodiment is further refined on the basis of Embodiment 4:

[0112] As a specific implementation of the driver 12, the driver 12 is an electromagnetic driver 12 including an electromagnetic coil, a return spring and a moving iron core, and the latch 20 is fixedly connected to the moving iron core;

[0113] When the electromagnetic coil is energized, the electromagnetic coil drives the latch 20 through the moving iron core to perform a retracting action to move outward from the side plate 25, and the latch 20 moves to the second position on the stroke under the action of the driver 12;

[0114] When the electromagnetic coil loses power, the reset spring pushes the latch 20 or the moving iron core, so that the latch 20 performs a feeding action to move inwardly of the side plate 25, and the latch 20 moves to the first position on the stroke under the action of the driver 12;

[0115] 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.

[0116] In the present solution, the electromagnetic coil and the return spring are both used to act on the plug 20, specifically: when the electromagnetic coil is energized, it is used to convert the position of the plug 20 from the first position to the second position, so that the swing arm 10 releases the constraint on the first connecting seat 4; when the electromagnetic coil is de-energized, the return spring converts the position of the plug 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 static contact, the relative angle between the first connecting seat 4 and the second connecting seat 11 is maintained; therefore, in the present solution, when the state of the fuse needs to be remotely controlled, it is only necessary to briefly power the electromagnetic coil, which can effectively reduce the power consumption during the normal operation of the fuse; as a technician in this field, the fuse disconnection circuit when the fuse 27 is not blown is generally used to deal with emergency situations, so the fuse does not need to consume higher power during normal operation, based on this, the present 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, and the capacitor is charged so that the power supply module can provide the electromagnetic coil with sufficient power output when needed.

[0117] Embodiment 8:

[0118] This embodiment is further refined on the basis of Embodiment 3:

[0119] In order to facilitate the configuration of the driver 12 and the matching relationship between the second connection seat 11 and the fuse base, from the inside to the outside of the second connection seat 11, the side plate 25 includes a first seat body 13, a support shaft 16, a second seat body 19 and a connecting pipe 28 that are sequentially connected 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 body 13. The first seat body 13 and the second seat body 19 are both structures that protrude relative to the side of the support shaft 16.

[0120] The second shaft hole 14, the third shaft hole 15 and the pin hole 17 are all arranged on the first seat body 13, the second shaft hole 14 is a through hole or a blind hole extending along the thickness direction of the first seat body 13, the third shaft hole 15 is an internal threaded hole extending along the thickness direction of the first seat body 13, the support shaft 16 and the second seat body 19 are both hollow structures with a center hole arranged inside, the center holes of the support shaft 16 and the second seat body 19 are coaxial and connected, the pin hole 17 is connected with the center hole, and the extension direction of the pin hole 17 is parallel to the axis of the center hole;

[0121] 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 a connecting thread on the outside or a threaded tube structure with a connecting thread on the inside.

[0122] In this solution, the first seat body 13 is the structure closest to the inner side of the second connecting seat 11 on the side plate 25, and carries the second rotating shaft 5, the third rotating shaft 9 and the latch 20 through the second axial hole 14, the third axial hole 15 and the latch hole 17 respectively. The third axial hole 15 is set as an internal threaded hole, and the third rotating shaft 9 with a stud and a nut is used to constrain the position of the swing arm 10 in the thickness direction of the first seat body 13. Correspondingly, a first axial hole 22 with a stepped hole is set on the swing arm 10, so that the nut can be sunken and installed in the first axial hole 22 to realize the rotatable connection between the third rotating shaft 9 and the swing arm 10. The second seat body 19 and the first seat body 13 form bosses located at different ends of the support shaft 16. For the groove formed on the base hook, the second seat body 19 and the first seat body 13 are used to constrain the position of the support shaft 16 in the length direction of the groove. The support shaft 16 and the second seat body 19 are both hollow structures, and the center hole and the pin hole 17 are connected, aiming to achieve: when the electromagnetic driver 12 is connected using the connecting thread on the connecting tube 28, the structure formed by the moving iron core and the pin 20 can be introduced into the inner side of the first seat body 13 through the center hole and the pin hole 17; for the second seat body 19 located on the outside of the support shaft 16, it can be used to install the outer cover shell outside the electromagnetic driver 12, and the cavity between the outer cover shell and the electromagnetic driver is used to install the power supply module, and the power supply module and the electromagnetic driver 12 are both located on the inner side of the outer cover shell.

[0123] Embodiment 9:

[0124] This embodiment is further refined on the basis of embodiment 1:

[0125] As an implementation method for disposing the melt 27 on the first connection seat 4, it also includes a push plate 6 that is rotatable relative to the first connection seat 4, and also includes an elastic member with one end acting on the first connection seat 4 and the other end acting on the push plate 6;

[0126] By rotating the push plate 6 relative to the first connecting seat 4, the free end of the push plate 6 can be turned over to the position of the lower end opening of the fuse tube 1, and the elastic member is compressed and elastically deformed at this position.

[0127] In the present solution, the elastic member serves as a flipping and resetting structure of the push plate 6. When in use, the melt 27 stretched and tightened between the upper end of the fuse tube 1 and the first connecting seat 4 is supported on the free end of the push plate 6. Since the elastic member is compressed and elastically deformed at this position, the free end of the push plate 6 provides a thrust for the melt 27 located at the lower end of the fuse tube 1 (the end close to the first connecting seat 4). When the melt 27 is melting, if the melt 27 is not completely melted and the pulling force that the melt 27 can withstand is less than the pulling force generated by the push plate 6 on the melt 27, the melt 27 can be quickly broken under the action of the push plate 6, thereby achieving the purpose of improving the on-off response speed of the melt 27.

[0128] Embodiment 10:

[0129] This embodiment is further refined on the basis of Embodiment 9:

[0130] As a technical solution with a simple structure, convenient assembly of elastic parts and good restraint of the push plate 6 on the melt 27, the push plate 6 is fitted on the second rotating shaft 5 through the shaft hole clearance thereon, and the elastic part is a torsion spring 7 sleeved on the second rotating shaft 5;

[0131] When the free end of the push plate 6 is turned over to the position of the hole at the lower end of the fuse tube 1, the free end covers the side of the hole close to the first connecting seat 4;

[0132] The plate body of the push plate 6 that supports the free end is a V-shaped plate body, and the groove 26 on the plate body is located on the side of the plate body away from the orifice, one end of the groove 26 intersects with the edge of the free end close to the center of the orifice, and the groove 26 on the push plate 6 extends along the center line of the plate body toward the side where the second rotating shaft 5 is located.

[0133] In this solution, the push plate 6 can be configured to have two ear plates located at the rear side of the push plate 6 and a support plate located at the front side of the push plate 6. The V-shaped plate body is the support plate. The two ear plates are arranged opposite to each other. Each ear plate of the push plate 6 has an axial hole and the axial holes on the two ear plates are coaxial. The second rotating shaft 5 serves as the installation base of the elastic member of the torsion spring 7. One end of the torsion spring 7 is hooked on the first connecting seat 4, and the other end of the torsion spring 7 is hooked on the push plate 6. After the melt 27 is led out from the lower end of the fuse tube 1, it extends to the first connecting seat 4 along the length direction of the groove 26 on the V-shaped plate body and is fixed at the first On the connecting seat 4, the present solution is adopted, such as one end of the melt 27 is fixed on the clamping nut of the first connecting seat 4 and passes through the groove 26, and the other end is fixed on the moving contact at the upper end of the fuse tube 1. The push plate 6 elastically supported above can not only tension the melt 27 to maintain the fuse tube 1 and the first connecting seat 4 as a stable structure, but also, while the push plate 6 maintains the effect of quickly breaking the melt 27, the groove 26 can improve the stability of the matching state of the melt 27 and the push plate 6, so as to avoid abnormal operation of the fuse due to the detachment of the melt 27 from the push plate 6 during normal use.

[0134] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific embodiments of the present invention are limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, other embodiments obtained without departing from the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A drop-out fuse for a smart grid, comprising a fuse tube (1) and a first connection seat (4), wherein the tube seat (2) of the fuse tube (1) is hingedly connected to the first connection seat (4) via a first rotating shaft (3), and characterized in that: It also comprises a second connecting seat (11) hingedly connected to the first connecting seat (4) via a second rotating shaft (5); 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 matched with the first connecting seat (4) via a matching pair (8); the matching pair (8) serves as a linkage component between the first connecting seat (4) and the swing arm (10); the matching pair (8) is used to achieve: when the first connecting seat (4) flips around the second rotating shaft (5) relative to the second connecting seat (11), the first connecting seat (4) drives the swing arm (10) to swing around the third rotating shaft (9) via the matching pair (8); The device also includes a driver (12) mounted on the second connecting seat (11), wherein the driver (12) is provided with a latch (20) that moves under the action of the driver (12), wherein the latch (20) can move to a swinging track of the swing arm (10) swinging around the third rotating shaft (9), and the travel of the latch (20) satisfies: When the latch (20) is in the first position of the stroke, the latch (20) forces the fuse tube (1) to maintain a state in which the upper end of the fuse tube (1) cooperates with the upper static contact of the drop-out fuse by blocking the other end of the swing arm (10); When the latch (20) is in the second position on the stroke, the swing arm (10) swings based on the first position state, and the swing direction of the swing arm (10) satisfies: the swing arm (10) releases the first connection seat (4), so that the fuse tube (1) and the first connection seat (4) are under the action of their own weight and / or the fuse tube (1) and the first connection seat (4) are under the thrust of the upper static contact of the drop-out fuse on the upper moving contact of the fuse tube (1), the fuse tube (1) rotates synchronously with the first connection seat (4) around the second rotation axis (5), and the fuse tube (1) obtains a drop action; When the latch (20) blocks the other end of the swing arm (10), on the swing arm (10), the force arm between the latch (20) and the third rotating shaft (9) is longer than the force arm between the matching pair (8) and the third rotating shaft (9).

2. The drop-out fuse for smart grid according to claim 1, characterized in that: The mating pair (8) comprises a meshing tooth (21) and a tooth groove, one of the meshing tooth (21) and the tooth groove being arranged on the swing arm (10) and the other being arranged on the first connecting seat (4), and the meshing tooth (21) and the tooth groove forming a tooth meshing relationship.

3. The drop-out fuse for smart grid according to claim 1, characterized in that: The second connecting seat (11) comprises two side plates (25) arranged opposite to each other, and the two side plates (25) are fixedly connected via a connecting rod (24); A support shaft (16) is provided on each side plate (25), and the support shafts (16) on the two side plates (25) are coaxial; Each side plate (25) is provided with a second shaft hole (14), the second shaft holes (14) on the two side plates (25) are coaxial, and the second shaft hole (14) serves as a shaft hole that matches the second rotating shaft (5); The first connecting seat (4) is arranged in the cavity between the two side plates (25), and the side surface of the first connecting seat (4) is in surface contact with the inner side surface of each side plate (25); At least one side plate (25) is provided with a third shaft hole (15) and a driver (12); the third shaft hole (15) is used as a shaft hole for matching with a third rotating shaft (9); the driver (12) is arranged on the outside of the side plate (25); the swing arm (10) is arranged on the inside of the side plate (25); a latch hole (17) for slidingly matching with the latch (20) is provided on the side plate (25); the driver (12) is used for driving the latch (20) to slide along the length direction of the latch hole (17); the latch (20) passes through the side plate (25) through the latch hole (17).

4. The drop-out fuse for smart grid according to claim 3, characterized in that: One end of the latch pin (20) close to the inner side of the side plate (25) is a sloped end having an end face that is a sloped surface. The sloped surface is such that when the latch pin (20) moves to a first position in a stroke under the action of the driver (12), the sloped end blocks the swing arm (10) through the bottom side of the sloped surface; when the latch pin moves to a second position in a stroke under the action of the driver (12), the position on the sloped surface for blocking the swing arm (10) moves toward the top side of the sloped surface, and the swing arm (10) is in a state of being supported by the sloped surface.

5. The drop-out fuse for smart grid according to claim 4, characterized in that: An arc-shaped slide groove (18) is provided on the inner side surface of the side plate (25) provided with the third shaft hole (15), and the center of the slide groove (18) is located on the axis of the third rotating shaft (9); It also includes a sliding block (23) fixed on the swing arm (10), wherein the sliding block (23) is embedded in and slidably engaged with the sliding groove (18); When the latch moves to the second position on the stroke under the action of the driver (12), the slider (23) swings along with the swing arm (10) to the end side supported on the slide groove (18).

6. The drop-out fuse for smart grid according to claim 5, characterized in that: On the cross section of the slide groove (18), the maximum groove width position of the slide groove (18) is located on the inner side of the notch of the slide groove (18); The shape of the sliding block (23) is adapted to the sliding groove (18), and the sliding groove (18) limits the position of the sliding block (23) in the depth direction of the sliding groove (18) by constraining the sliding block (23) with its groove surface.

7. The drop-out fuse for smart grid according to any one of claims 4 to 6, characterized in that: The driver (12) is an electromagnetic driver comprising an electromagnetic coil, a return spring and a moving iron core, and the latch (20) is fixedly connected to the moving iron core; When the electromagnetic coil is energized, the electromagnetic coil drives the latch (20) through the moving iron core to perform a retracting action toward the outside of the side plate (25), and the latch moves to a second position on the stroke under the action of the driver (12); When the electromagnetic coil loses power, the reset spring pushes the latch (20) or the moving iron core, so that the latch (20) performs a feeding action to move inwardly of the side plate (25), and the latch moves to a first position on the stroke under the action of the driver (12); 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.

8. The drop-out fuse for smart grid according to claim 3, characterized in that: From the inside to the outside of the second connecting seat (11), the side plate (25) comprises a first seat body (13), a support shaft (16), a second seat body (19) and a connecting pipe (28) which are sequentially connected 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 body (13), and the first seat body (13) and the second seat body (19) are both structures that protrude outward relative to the side of the support shaft (16); The second axial hole (14), the third axial hole (15) and the latch hole (17) are all arranged on the first base body (13); the second axial hole (14) is a through hole or a blind hole extending along the thickness direction of the first base body (13); the third axial hole (15) is an internal threaded hole extending along the thickness direction of the first base body (13); the support shaft (16) and the second base body (19) are both hollow structures with a center hole arranged inside; the center holes of the support shaft (16) and the second base body (19) are coaxial and connected to each other; the latch hole (17) is connected to the center hole; and the extension direction of the latch hole (17) is parallel to the axis of the center 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 a connecting thread provided on the outside or a threaded tube structure with a connecting thread provided on the inside.

9. The drop-out fuse for smart grid according to any one of claims 1 to 6 and 8, characterized in that: It also includes a push plate (6) that is rotatable relative to the first connecting seat (4), and an elastic member with one end acting on the first connecting seat (4) and the other end acting on the push plate (6); By rotating the push plate (6) relative to the first connection seat (4), the free end of the push plate (6) can be flipped to the position of the lower end opening of the fuse tube (1), at which position the elastic member undergoes compression elastic deformation.

10. The drop-out fuse for smart grid according to claim 9, characterized in that: The push plate (6) is fitted on the second rotating shaft (5) through the clearance of the shaft hole thereon, and the elastic member is a torsion spring (7) sleeved on the second rotating shaft (5); When the free end of the push plate (6) is flipped to the position of the opening at the lower end of the fuse tube (1), the free end covers a side of the opening close to the first connecting seat (4); The push plate (6) supports the free end and is a V-shaped plate. The groove (26) on the plate is located on a side of the plate away from the orifice. One end of the groove (26) intersects with an edge of the free end close to the center of the orifice. The groove (26) on the push plate (6) extends along the center line of the plate toward the side where the second rotating shaft (5) is located.

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