Overload execution switch group for energy consumption priority distribution of smart power grid

Abstract

The invention relates to the technical field of switch devices, in particular to an overload execution switch group for energy consumption priority distribution of an intelligent power grid, which comprises an outer shell, a plurality of groups of paired static contacts and movable contacts are arranged in the outer shell, the plurality of static contacts are fixed in the outer shell and are connected in parallel with a main power supply line, and the movable contacts are connected in parallel with the main power supply line. The plurality of movable contacts are movably arranged in the outer shell and are respectively connected with the load branch circuits in series, each group of static contacts and movable contacts is responsible for controlling the connection and disconnection of one group of load branch circuits and the main power supply line circuit, and an overload execution switch unit is arranged in the outer shell. The execution switch unit comprises a plurality of electromagnetic iron cores fixed in the outer shell, priority ranking and breaking operation are achieved through a mechanical linkage structure, process power is cut off in order, enough buffer time is provided for important loads, and the load branch circuits are cut off in sequence according to the preset priority under the overload condition. And an external power supply and a control unit are not needed, the structure is simple, the cost is low and the reliability is extremely high.

Description

Technical Field

[0001] This invention relates to the field of switching device technology, specifically to an overload execution switching group for energy consumption priority allocation in smart grids. Background Technology

[0002] With the deepening of smart grid construction, the power system has placed higher demands on the accuracy and reliability of load control. In the distribution system, overload protection is one of the key links to ensure the safe and stable operation of the power grid. Traditional overload protection devices, such as thermal-magnetic circuit breakers and electronic circuit breakers, are mostly based on current threshold triggering. They perform tripping operations after detecting an overload. However, their operating characteristics are often "all or nothing," meaning that once triggered, the entire line is disconnected simultaneously. They cannot distinguish the importance of the load, resulting in all loads losing power at the same time. They cannot provide buffer time or orderly shutdown process power for critical loads. For example, in an emergency power outage in a hospital, the most important loads, such as the hospital's life support system, data center, and emergency lighting equipment, should be the last to be de-energized.

[0003] To improve power supply reliability, some existing technologies have developed solutions for phased and prioritized load shedding, such as intelligent distribution units based on microprocessors and communication modules. These units can disconnect non-critical loads in a preset order via remote commands or local judgment. However, these solutions typically rely on complex control circuits, signal acquisition modules, and communication systems, resulting in high costs and potential loss of tiered protection functions in the event of communication interruptions or controller failures. On the other hand, purely mechanical multi-stage disconnection mechanisms are often structurally complex and have low operational precision, making it difficult to achieve compact, reliable, and flexibly prioritized disconnection operations.

[0004] Therefore, there is still a need for an execution switch group with a reasonable structure, which does not require external control energy and can rely on its own electromechanical structure to sequentially disconnect multiple load branches in strict priority order when overloaded, in order to meet the application scenarios with high requirements for reliability, response speed and manufacturing cost. To this end, we provide an overload execution switch group for smart grid energy consumption priority allocation to solve the above-mentioned problems. Summary of the Invention

[0005] The purpose of this invention is to provide an overload execution switch group for energy consumption priority allocation in smart grids, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: An overload actuator switch group for energy consumption priority allocation in a smart grid includes a housing. Multiple pairs of stationary and moving contacts are disposed within the housing. The stationary contacts are fixed within the housing and connected in parallel with the main power supply line. The moving contacts are movably disposed within the housing and connected in series with respective load branch circuits. Each pair of stationary and moving contacts controls the connection between one load branch circuit and the main power supply line circuit. An overload execution switch unit is provided inside the housing. This unit can disconnect each load branch in sequence according to a preset priority under overload conditions. The execution switch unit includes multiple electromagnet cores fixed inside the housing. An induction coil connected in series with the load branch circuit is wound on the electromagnet core. A guide seat is fixed inside the housing. A lifting rod is movably engaged on the guide seat. A magnetic armature is fixed at the top of the lifting rod. When the load branch circuit is overloaded, the current of the induction coil increases, which strengthens the magnetic force of the electromagnet core and can be used to attract the magnetic armature to move upward. The magnetic armature and the moving contact cooperate through a linkage structure, so that when the magnetic armature moves upward, it will sequentially drive the moving contacts of multiple load branch circuits to move horizontally and disconnect from the stationary contacts, thereby realizing the sequential disconnection of multiple load branch circuits according to priority.

[0007] An overload execution switch group for energy consumption priority allocation in a smart grid as described above: the guide seat has a through hole with an inner diameter that matches the outer diameter of the lifting rod, the lifting rod is inserted through the through hole, and a first spring is sleeved on the lifting rod, the first spring being located between the magnetic armature and the guide seat.

[0008] An overload execution switch group for energy consumption priority allocation in a smart grid, as described above: The linkage structure includes multiple coaxially arranged rotating shafts rotatably mounted on a housing. A swing arm is fixed on each rotating shaft. A support rod is fixed on the housing. A movable rod is fixed on each swing arm. A second spring is provided between the movable rod and the support rod. The two ends of the second spring are respectively fixed to the support rod and the movable rod. A push-pull rod is provided between the lifting rod and the swing arm. The two ends of the push-pull rod are respectively hinged to the lifting rod and the swing arm. Multiple contact levers paired with the rotating shafts are rotatably mounted on the housing. A lever is fixed with a block at one end and a slider at the other end. A push plate is slidably mounted on the housing. A connector is fixed at the end of the push plate. The connector is fixed to a moving contact. The slider is slidably engaged inside the connector. The swing arm has a sliding groove, and a counterweight is slidably engaged in the sliding groove. The counterweight on the first rotating shaft is fixed at the top of the sliding groove, and the counterweights on the other rotating shafts are movably engaged in the sliding grooves, with their vertical height from the rotating shafts increasing sequentially. When the first rotating shaft rotates counterclockwise, it will sequentially drive the counterweights on the other rotating shafts to rise to the same height as the counterweight on the first rotating shaft.

[0009] As described above, an overload execution switch group for energy consumption priority allocation in a smart grid includes: cams rotatably mounted on the remaining shafts, which are connected to the preceding shafts via a transmission mechanism. When the preceding shaft rotates, it drives the cams to rotate synchronously in the opposite direction. A first guide groove and a second guide groove are fixed on the fixed swing arms on the remaining shafts, with the second guide groove communicating with a sliding groove. A push rod is fixed on the cam and movably engaged inside the first guide groove. A connecting rod is provided between the push rod and the counterweight, with both ends of the connecting rod hinged to the push rod and the counterweight, respectively.

[0010] An overload execution switch group for energy consumption priority allocation in a smart grid as described above: a guide pin is fixed on the push plate, and a through groove with an inner diameter that matches the outer diameter of the guide pin is opened on the outer shell, and the guide pin is movably engaged inside the through groove.

[0011] An overload execution switch group for energy consumption priority allocation in a smart grid, as described above: The transmission mechanism includes a transmission shaft rotatably mounted on the housing. The transmission shaft and the rotating shaft are driven by a first sprocket mechanism. When the rotating shaft rotates, it drives the transmission shaft to rotate synchronously. Each of the remaining rotating shafts has a driven shaft rotatably mounted on the housing on one side. The driven shaft and the transmission shaft are driven by a second sprocket mechanism. When the transmission shaft rotates, it drives the driven shaft to rotate synchronously. The cam and the driven shaft are driven by a gear mechanism. When the driven shaft rotates, it drives the cam to rotate.

[0012] An overload execution switch group for energy consumption priority allocation in a smart grid as described above: The first sprocket mechanism includes a first sprocket fixed on a rotating shaft and a second sprocket fixed on a transmission shaft, and the first sprocket and the second sprocket are driven by a first chain.

[0013] An overload execution switch group for energy consumption priority allocation in a smart grid as described above: the second sprocket mechanism includes a third sprocket fixed on a drive shaft and a fourth sprocket fixed on a driven shaft, and the third sprocket and the fourth sprocket are driven by a second chain.

[0014] An overload execution switch group for energy consumption priority allocation in a smart grid as described above: the gear mechanism includes a driving gear fixed on a driven shaft and a driven gear fixed on a cam, wherein the driven gear meshes with the cam.

[0015] An overload execution switch group for energy consumption priority allocation in a smart grid as described above: a locking block is fixed on the counterweight block and is slidably engaged inside the slide groove and the second guide groove, and a stop block is fixed at one end of the locking block. The stop block and the counterweight block are respectively attached to the two end faces of the swing arm.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: In use, multiple pairs of stationary contacts and moving contacts are provided in the housing. When the stationary contacts and moving contacts are in contact, the main power supply line is connected to the load branch circuit. When the stationary contacts and moving contacts are separated, the main power supply line is disconnected from the load branch circuit. An overload execution switch unit is provided in the housing. When the load branch circuit is overloaded, the current of the induction coil increases, which strengthens the magnetic force of the electromagnet core and can be used to attract the magnetic armature to move upward. When the magnetic armature moves upward, it will sequentially drive the moving contacts of multiple load branch circuits to move horizontally and disconnect from the stationary contacts, thereby realizing the sequential disconnection of multiple load branch circuits according to priority. This invention has the following significant advantages: (1) The present invention uses the design of the electromagnet core, lifting rod, swing arm, sprocket and connecting rod linkage to convert the overload current signal into the mechanical displacement of the moving contact, and uses the mechanical linkage structure itself to realize priority sorting and disconnection operation. No external power supply and control unit are required. The structure is simple, the cost is low and the reliability is extremely high.

[0017] (2) By setting counterweights with different initial heights on each swing arm and designing differential lifting and synchronous transmission in the linkage mechanism, this invention ensures that during the upward movement of the lifting rod, each moving contact is triggered sequentially in a preset order to achieve orderly power cut-off. Important loads are set as the last priority so that they can be retained to the maximum extent until the last cut-off, providing sufficient buffer time for important loads.

[0018] (3) The present invention uses the principle of electromagnetic induction to directly drive the induction coil wound on the electromagnet core, and the mechanical transmission is not delayed; the components are precisely matched by sliders, through slots, hinges and other means to effectively avoid false movement and failure to move, and ensure that the overload can be interrupted in a timely and accurate manner. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of an overload execution switch group for energy consumption priority allocation in a smart grid.

[0020] Figure 2 This is a partial cross-sectional view of the outer casing of an overload actuator switch group for energy priority allocation in a smart grid.

[0021] Figure 3 An overload actuator switch group for energy consumption priority allocation in a smart grid Figure 2 A schematic diagram of the decomposed part of the structure.

[0022] Figure 4 An overload actuator switch group for energy consumption priority allocation in a smart grid Figure 3 A structural diagram from another perspective.

[0023] Figure 5 An overload actuator switch group for energy consumption priority allocation in a smart grid Figure 3 A schematic diagram of the decomposed part of the structure.

[0024] Figure 6 An overload actuator switch group for energy consumption priority allocation in a smart grid Figure 5 A schematic diagram of the decomposed part of the structure.

[0025] Figure 7 An overload actuator switch group for energy consumption priority allocation in a smart grid Figure 6 A structural diagram from another perspective.

[0026] Figure 8 An overload actuator switch group for energy consumption priority allocation in a smart grid Figure 6 A schematic diagram of the decomposed part of the structure.

[0027] Figure 9 An overload actuator switch group for energy consumption priority allocation in a smart grid Figure 8 A schematic diagram of the decomposed part of the structure.

[0028] Figure 10 An overload actuator switch group for energy consumption priority allocation in a smart grid Figure 9 A schematic diagram of the decomposed part of the structure.

[0029] In the diagram: 1. Outer shell; 2. Stationary contact; 3. Moving contact; 4. Guide seat; 5. Lifting rod; 6. Magnetic armature; 7. First spring; 8. Electromagnetic core; 9. Induction coil; 10. Rotating shaft; 11. Swing arm; 12. Support rod; 13. Movable rod; 14. Second spring; 15. Push-pull rod; 16. Contact lever; 17. Pulley; 18. Push plate; 19. Guide pin; 20. Connector; 21. Slider; 22. Counterweight; 23. Drive shaft; 24. First sprocket; 25. Second sprocket; 26. First chain; 27. Driven shaft; 28. Third sprocket; 29. ​​Fourth sprocket; 30. Second chain; 31. Driving gear; 32. Driven gear; 33. Cam; 34. First guide groove; 35. Second guide groove; 36. Push rod; 37. Connecting rod; 38. Slide groove. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0031] Please see Figures 1-10As an embodiment of the present invention, an overload execution switch group for energy consumption priority allocation in a smart grid includes a housing 1. Multiple pairs of stationary contacts 2 and moving contacts 3 are disposed within the housing 1. The stationary contacts 2 are fixed within the housing 1 and connected in parallel with the main power supply line. The moving contacts 3 are movably disposed within the housing 1 and connected in series with the load branch circuits, respectively. Each pair of stationary contacts 2 and moving contacts 3 is responsible for controlling the connection between one load branch circuit and the main power supply line circuit. An overload execution switch unit is provided inside the outer casing 1. This unit can disconnect each load branch in sequence according to a preset priority under overload conditions. The execution switch unit includes multiple electromagnet cores 8 fixed inside the outer casing 1. An induction coil 9 connected in series with the load branch circuit is wound on the electromagnet core 8. A guide seat 4 is fixed inside the outer casing 1. A lifting rod 5 is movably engaged on the guide seat 4. A magnetic armature 6 is fixed at the top of the lifting rod 5. When the load branch circuit is overloaded, the current of the induction coil 9 increases, which strengthens the magnetic force of the electromagnet core 8 and can be used to attract the magnetic armature 6 to move upward. The magnetic armature 6 and the moving contact 3 cooperate through a linkage structure, so that when the magnetic armature 6 moves upward, it will drive the moving contacts 3 of multiple load branch circuits to move horizontally and disconnect from the stationary contact 2 in sequence, thereby realizing the sequential disconnection of multiple load branch circuits according to priority.

[0032] In this embodiment, during use, the outer casing 1 is provided with multiple pairs of stationary contacts 2 and moving contacts 3. When the stationary contacts 2 and moving contacts 3 are in contact, the main power supply line is connected to the load branch circuit. When the stationary contacts 2 and moving contacts 3 are separated, the main power supply line is disconnected from the load branch circuit. The outer casing 1 is provided with an overload execution switch unit. When the load branch circuit is overloaded, the current of the induction coil 9 will increase. The induction coil 9 is wound on the electromagnet core 8, which will strengthen the magnetic force of the electromagnet core 8. The electromagnet core 8 can be used to attract the magnetic armature 6 to move upward. The greater the overload of the branch circuit, the greater the current, and the stronger the magnetic force of the electromagnet core 8, the greater the attraction force on the magnetic armature 6. When the magnetic armature 6 moves upward, it will sequentially drive the moving contacts 3 of multiple load branch circuits to move horizontally and disconnect from the stationary contacts 2, thereby realizing the sequential disconnection of multiple load branch circuits according to priority.

[0033] As a further embodiment of the present invention, the guide seat 4 is provided with a through hole whose inner diameter is adapted to the outer diameter of the lifting rod 5. The lifting rod 5 is inserted through the through hole, and a first spring 7 is sleeved on the lifting rod 5. The first spring 7 is located between the magnetic armature 6 and the guide seat 4.

[0034] In this embodiment, the first spring 7 provides support for the magnetic armature 6. When the overload is eliminated and the electromagnetic force is weakened, the elastic force of the second spring 14 can pull the lifting rod 5 downward, so that the magnetic armature 6 is reset to the initial position, the entire mechanism returns to the initial state, and is ready for the next action. As a further embodiment of the present invention, the linkage structure includes multiple coaxially arranged rotating shafts 10 rotatably mounted on the outer shell 1, a swing arm 11 fixed on the rotating shaft 10, a support rod 12 fixed on the outer shell 1, a movable rod 13 fixed on the swing arm 11, a second spring 14 between the movable rod 13 and the support rod 12, the two ends of the second spring 14 being fixed to the support rod 12 and the movable rod 13 respectively, a push-pull rod 15 between the lifting rod 5 and the swing arm 11, the two ends of the push-pull rod 15 being hinged to the lifting rod 5 and the swing arm 11 respectively, multiple contact levers 16 rotatably mounted on the outer shell 1 and paired with the rotating shafts 10, a lever 17 fixed at one end of the contact lever 16 and a slider 21 fixed at the other end, a push plate 18 slidably mounted on the outer shell 1, a connector 20 fixed at the end of the push plate 18, the connector 20 being fixed to the moving contact 3, and the slider 21 being slidably engaged inside the connector 20; The swing arm 11 has a slide groove 38, and a counterweight 22 is slidably engaged in the slide groove 38. The counterweight 22 on the first rotating shaft 10 is fixed at the uppermost position of the slide groove 38, and the counterweights 22 on the other rotating shafts 10 are movably engaged in the slide groove 38, with the vertical height from the rotating shaft 10 increasing sequentially. When the first rotating shaft 10 rotates counterclockwise, it will sequentially drive the counterweights 22 on the other rotating shafts 10 to rise to the same height as the counterweights 22 on the first rotating shaft 10.

[0035] In this embodiment, the magnetic force of the electromagnet core 8 attracts the magnetic armature 6, causing the lifting rod 5 to move upward. As the lifting rod 5 moves upward, it pulls the push-pull rod 15 upward, causing the swing arm 11 to deflect. When the swing arm 11 deflects, it overcomes the elastic force of the second spring 14. As the lifting rod 5 continues to move upward, it causes the swing arm 11 to continue deflecting until the second spring 14 is in a vertical state. At this point, the second spring 14 reaches its maximum extension. When the lifting rod 5 continues to move upward, the swing arm 11 continues to deflect, causing the second spring 14 to continue to deflect. Spring 14 continues to oscillate, and then will instantly deflect to the other side. The swing arm 11 and the lever 17 are on the same plane. When the swing arm 11 oscillates, it squeezes the lever 17 and causes the contact lever 16 to deflect. The slider 21 slides in the connector 20. When the contact lever 16 deflects, it will cause the push plate 18 to move horizontally. When the push plate 18 moves, it will cause the moving contact 3 on one side of the connector 20 to disengage from the stationary contact 2, thereby disconnecting the load branch circuit controlled by this set of moving contacts 3 and stationary contacts 2. Furthermore, the counterweight 22 on the first rotating shaft 10 is fixed at the top of the slide 38, while the counterweights 22 on the remaining rotating shafts 10 are movably engaged inside the slide 38, with their vertical heights from the rotating shafts 10 increasing sequentially. This minimizes the resistance to the deflection of the swing arm 11 on the first rotating shaft 10, while the resistance to deflecting the swing arms 11 on the remaining rotating shafts 10 gradually increases. Therefore, by designing the initial installation height of the counterweights 22 in the slide 38, the triggering sequence is directly determined. When the minimum overload value is reached, the attraction force generated by the electromagnet core 8 is just enough to deflect the swing arm 11 on the first rotating shaft 10, causing the stationary contact 2 and moving contact 3 associated with the first rotating shaft 10 to disengage. The branch controlled by the first stationary contact 2 and moving contact 3 is designed as the highest priority circuit and is disconnected first. The remaining counterweights 22, due to their progressively decreasing initial heights, require greater resistance to deflect the swing arms 11, while the attraction force generated by the electromagnet core 8 is insufficient to deflect the remaining rotating shafts. When the swing arm 11 on the first shaft 10 deflects, the remaining load branch circuits are still connected. When the first shaft 10 rotates counterclockwise, it will sequentially drive the counterweight 22 on the second shaft 10 to rise to the same height as the counterweight 22 on the first shaft 10. When the load branch circuit associated with the first shaft 10 is disconnected, if the circuit is no longer under load, the attraction force generated by the electromagnet core 8 is insufficient to drive the swing arm 11 on the second shaft 10 to deflect, and the remaining load branch circuits will continue to operate normally. If the circuit is still under load, the attraction force generated by the electromagnet core 8 can drive the swing arm 11 on the second shaft 10 to deflect, thereby making the branch circuit controlled by the stationary contact 2 and the moving contact 3 associated with the second shaft 10 a second priority circuit, and it will also be disconnected. Similarly, if the circuit is still under load, the above operation will be repeated, so that the branch circuits will be disconnected sequentially according to priority until the circuit is no longer under load or the circuit is completely disconnected.

[0036] As a further embodiment of the present invention, cams 33 are rotatably mounted on the remaining rotating shafts 10. The cams 33 are respectively connected to the rotating shafts 10 of the previous stage through a transmission mechanism. When the rotating shafts 10 of the previous stage rotate, they will drive the cams 33 to rotate synchronously in the opposite direction. The swing arms 11 fixed on the remaining rotating shafts 10 are respectively fixed with a first guide groove 34 and a second guide groove 35. The second guide groove 35 communicates with the slide groove 38. A push rod 36 is fixed on the cam 33 and is movably engaged inside the first guide groove 34. A connecting rod 37 is provided between the push rod 36 and the counterweight 22. The two ends of the connecting rod 37 are respectively hinged to the push rod 36 and the counterweight 22.

[0037] In this embodiment, the function of the cam 33 is to accurately transmit and convert the rotation of the front-stage shaft 10 into the action of lifting the subsequent counterweight 22. When the front-stage shaft 10 rotates, it will drive the cam 33 to rotate synchronously in the opposite direction. The specific shape of the cam 33 ensures that the push rod 36 can slide in the first guide groove 34. When the push rod 36 slides, the two ends of the connecting rod 37 are hinged to the push rod 36 and the counterweight 22 respectively, which will drive the counterweight 22 to be lifted upward to the maximum height. The second guide groove 35 is connected to the slide groove 38. The second guide groove 35 and the slide groove 38 play a guiding and limiting role for the counterweight 22. When the counterweight 22 is lifted to the maximum height, the swing arm 11 needs to make a deflection movement. The fact that the counterweight 22 can slide in the second guide groove 35 ensures that the deflection movement trajectory of the swing arm 11 is accurate.

[0038] As a further embodiment of the present invention, a guide pin 19 is fixed on the push plate 18, and a through groove with an inner diameter that matches the outer diameter of the guide pin 19 is provided on the outer shell 1, and the guide pin 19 is movably engaged inside the through groove.

[0039] In this embodiment, the guide pin 19 engages with the through groove on the outer casing 1 to form a sliding guide mechanism for the push plate 18. This structure ensures that the push plate 18 can only move precisely in the horizontal direction, thereby driving the moving contact 3 and the stationary contact 2 to achieve stable and reliable separation and contact, preventing the push plate 18 from deflecting or getting stuck during movement.

[0040] As a further embodiment of the present invention, the transmission mechanism includes a transmission shaft 23 rotatably mounted on the outer casing 1. The transmission shaft 23 and the rotating shaft 10 are driven by a first sprocket mechanism. When the rotating shaft 10 rotates, it drives the transmission shaft 23 to rotate synchronously. On one side of the other rotating shafts 10, there are driven shafts 27 rotatably mounted on the outer casing 1. The driven shafts 27 and the transmission shaft 23 are driven by a second sprocket mechanism. When the transmission shaft 23 rotates, it drives the driven shafts 27 to rotate synchronously. The cam 33 and the driven shaft 27 are driven by a gear mechanism. When the driven shaft 27 rotates, it drives the cam 33 to rotate.

[0041] In this embodiment, the multi-stage transmission mechanism ensures that power is reliably transmitted from the rotating shaft 10 to the subsequent stages. The first sprocket mechanism realizes the same-direction transmission from the first-stage rotating shaft 10 to the transmission shaft 23; the second sprocket mechanism distributes power from the transmission shaft 23 to each driven shaft 27; the gear mechanism finally transmits the rotation of the driven shaft 27 to the cam 33. The entire transmission chain design ensures the synchronicity and coordination of the actions of each execution unit.

[0042] As a further embodiment of the present invention, the first sprocket mechanism includes a first sprocket 24 fixed on the rotating shaft 10 and a second sprocket 25 fixed on the transmission shaft 23, and the first sprocket 24 and the second sprocket 25 are driven by a first chain 26.

[0043] In this embodiment, the first sprocket mechanism provides an efficient and reliable long-distance power transmission method with a constant transmission ratio, ensuring that the rotational speeds of the transmission shaft 23 and the first-stage rotating shaft 10 have a definite proportional relationship, thereby precisely controlling the timing of subsequent mechanism actions.

[0044] As a further embodiment of the present invention, the second sprocket mechanism includes a third sprocket 28 fixed on the drive shaft 23 and a fourth sprocket 29 fixed on the driven shaft 27, with the third sprocket 28 and the fourth sprocket 29 being driven by a second chain 30.

[0045] In this embodiment, the function of the second sprocket mechanism is to transmit power from the central drive shaft 23 to the driven shaft 27.

[0046] As a further embodiment of the present invention, the gear mechanism includes a driving gear 31 fixed on the driven shaft 27 and a driven gear 32 fixed on the cam 33, wherein the driven gear 32 meshes with the cam 33.

[0047] In this embodiment, the gear mechanism realizes short-distance power transmission from the moving shaft 27 to the cam 33 and changes the direction of rotational motion. The gear transmission has the advantages of constant instantaneous transmission ratio, high efficiency and compact structure. It can precisely control the phase of the cam 33. By selecting different gear ratios, the rotation amplitude of the cam 33 can be adjusted to meet the subtle requirements of different priority branches on the lifting height of the counterweight 22.

[0048] As a further embodiment of the present invention, a locking block is fixed on the counterweight block 22, which is slidably engaged with the sliding groove 38 and the second guide groove 35, and a stop block is fixed at one end of the locking block. The stop block and the counterweight block 22 are respectively attached to the two end faces of the swing arm 11.

[0049] In this embodiment, the locking block and the stop block together constitute the axial limit of the counterweight 22. The locking block ensures that the counterweight 22 can only slide along the slide groove 38 and cannot fall off; the stop block fits against the side of the swing arm 11 to prevent the counterweight 22 from falling off during sliding, thus ensuring its stability.

[0050] The working principle of this invention is as follows: When the system is working normally, the current in each load branch is within the rated range, the magnetic force generated by the induction coil 9 is insufficient to overcome the elastic force of the first spring 7, the magnetic armature 6 remains stationary, all moving contacts 3 and stationary contacts 2 remain closed, and the load is powered normally; when the circuit is overloaded, the branch current increases sharply, and the current in the corresponding induction coil 9 increases synchronously, causing the electromagnet core 8 to generate a sufficiently strong magnetic field force, attracting the magnetic armature 6 to move upward. When the magnetic armature 6 moves upward, it drives the swing arm 11 on the first rotating shaft 10 to rotate counterclockwise. The rotation of the first swing arm 11 pushes the contact lever 16 to rotate clockwise, causing the connector 20 to move horizontally, so that the first rotating shaft 10 is associated with the highest priority. The moving contact 3 first separates from the stationary contact 2, cutting off the least important load branch. Simultaneously, as the first rotating shaft 10 rotates counterclockwise, it drives the transmission shaft 23 to rotate via the first sprocket mechanism. This, in turn, drives the driven shaft 27 on one side of the second rotating shaft 10 to rotate via the second sprocket mechanism. The gear mechanism then drives the cam 33 on the second rotating shaft 10 to rotate. The cam 33 drives the push rod 36 to rotate, which, via the connecting rod 37, pulls the counterweight 22 in the slide groove 38 of the subsequent swing arm 11 upwards until it reaches the same height as the counterweight 22 on the first rotating shaft 10. This height is designed as the trigger height for minimum overload. If the circuit is no longer under load, the attraction force generated by the electromagnet core 8 is insufficient to drive the second rotating shaft. When the swing arm 11 on the second shaft 10 deflects, the remaining load branch circuits continue to operate normally. If the circuit is still under load, the attraction force generated by the electromagnet core 8 can drive the swing arm 11 on the second shaft 10 to deflect, thereby causing the branch controlled by the stationary contact 2 and the moving contact 3 associated with the second shaft 10 to be designed as a second priority circuit and thus disconnected. Similarly, if the circuit is still under load, the above operation will be repeated, disconnecting each load branch in a preset priority order from low to high, until the overload is relieved or all branches are disconnected. When the overload is relieved, the current in the induction coil 9 drops, the electromagnetic force weakens, and the magnetic armature 6 resets and descends under the action of the second spring 14. The entire linkage mechanism then... The circuit returns to its initial state under the action of the second spring 14. When it is necessary to reconnect the branch, manually push the push plate 18 on the disconnected branch to move the connector 20 and restore the closure of the stationary contact 2 and the moving contact 3. At the same time, when the push plate 18 moves, it will drive the contact lever 16 to rotate clockwise, causing the lever 17 to press against the swing arm 11 and drive the swing arm 11 to rotate counterclockwise to reset, ready for the next operation. In addition, when the swing arm 11 rotates counterclockwise, the counterweight 22 will also fall back to the intersection of the second guide groove 35 and the slide groove 38. When the rotating shaft 10 rotates counterclockwise, the cam 33 rotates clockwise, which can drive the counterweight 22 to slide in the slide groove 38 and fall back to the initial height position of the counterweight 22 preset for the branch, which is convenient for the next use.

[0051] The above embodiments are exemplary and not restrictive. Therefore, any technical solutions that can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention are included within the scope of the present invention.

Claims

1. An overload execution switch group for energy consumption priority allocation in a smart grid, comprising a housing (1), wherein multiple sets of paired stationary contacts (2) and moving contacts (3) are provided inside the housing (1), the multiple stationary contacts (2) are fixed inside the housing (1) and connected in parallel with the main power supply line, the multiple moving contacts (3) are movably disposed inside the housing (1) and connected in series with the load branch circuits respectively, each set of stationary contacts (2) and moving contacts (3) is responsible for controlling the on / off connection of a set of load branch circuits with the main power supply line circuit, characterized in that, An overload execution switch unit is provided inside the outer shell (1). This unit can disconnect each load branch in sequence according to a preset priority under overload conditions. The execution switch unit includes multiple electromagnet cores (8) fixed inside the outer shell (1). An induction coil (9) connected in series with the load branch circuit is wound on the electromagnet core (8). A guide seat (4) is fixed inside the outer shell (1). A lifting rod (5) is movably connected to the guide seat (4). A magnetic armature (6) is fixed at the top of the lifting rod (5). When the load branch circuit is overloaded, the current of the induction coil (9) increases, which strengthens the magnetic force of the electromagnet core (8) and can be used to attract the magnetic armature (6) to move upward. The magnetic armature (6) and the moving contact (3) cooperate through a linkage structure, so that when the magnetic armature (6) moves upward, it will drive the moving contacts (3) of multiple load branch circuits to move horizontally and disconnect from the stationary contact (2) in sequence, thereby realizing the sequential disconnection of multiple load branch circuits according to priority.

2. The overload execution switch group for smart grid energy consumption priority allocation according to claim 1, characterized in that, The guide seat (4) has a through hole with an inner diameter that matches the outer diameter of the lifting rod (5). The lifting rod (5) is inserted through the through hole. A first spring (7) is sleeved on the lifting rod (5). The first spring (7) is located between the magnetic armature (6) and the guide seat (4).

3. The overload execution switch group for smart grid energy consumption priority allocation according to claim 1, characterized in that, The linkage structure includes multiple coaxially arranged rotating shafts (10) rotatably mounted on the outer shell (1). A swing arm (11) is fixed to each rotating shaft (10). A support rod (12) is fixed to the outer shell (1). A movable rod (13) is fixed to each swing arm (11). A second spring (14) is provided between the movable rod (13) and the support rod (12). The two ends of the second spring (14) are fixed to the support rod (12) and the movable rod (13) respectively. A push-pull rod (15) is provided between the lifting rod (5) and the swing arm (11). The push-pull rod (15) is hinged to the lifting rod (5) and the swing arm (11) at both ends respectively. Multiple contact levers (16) are rotatably arranged on the outer shell (1) and exist in pairs with the rotating shaft (10). One end of the contact lever (16) is fixed with a lever block (17) and the other end is fixed with a slider (21). A push plate (18) is slidably arranged on the outer shell (1). A connector (20) is fixed at the end of the push plate (18). The connector (20) is fixed with the moving contact (3). The slider (21) is slidably engaged inside the connector (20). The swing arm (11) is provided with a sliding groove (38), and a counterweight (22) is slidably engaged in the sliding groove (38). The counterweight (22) on the first rotating shaft (10) is fixed at the uppermost position of the sliding groove (38), and the counterweights (22) on the other rotating shafts (10) are respectively movably engaged in the sliding groove (38), and the vertical height from the rotating shaft (10) increases sequentially. When the first rotating shaft (10) rotates counterclockwise, it will sequentially drive the counterweights (22) on the other rotating shafts (10) to rise to the same height as the counterweights (22) on the first rotating shaft (10).

4. The overload execution switch group for smart grid energy consumption priority allocation according to claim 3, characterized in that, The remaining rotating shafts (10) are respectively equipped with cams (33). The cams (33) are respectively connected to the rotating shafts (10) of the previous stage through a transmission mechanism. When the rotating shafts (10) of the previous stage rotate, they will drive the cams (33) to rotate synchronously in the opposite direction. The swing arms (11) fixed on the remaining rotating shafts (10) are respectively fixed with a first guide groove (34) and a second guide groove (35). The second guide groove (35) is connected to the slide groove (38). The cams (33) are fixed with push rods (36) that are movably engaged inside the first guide groove (34). A connecting rod (37) is provided between the push rod (36) and the counterweight (22). The two ends of the connecting rod (37) are respectively hinged to the push rod (36) and the counterweight (22).

5. The overload execution switch group for smart grid energy consumption priority allocation according to claim 3, characterized in that, A guide pin (19) is fixed on the push plate (18), and a through groove with an inner diameter that matches the outer diameter of the guide pin (19) is opened on the outer shell (1). The guide pin (19) is movably engaged inside the through groove.

6. The overload execution switch group for smart grid energy consumption priority allocation according to claim 4, characterized in that, The transmission mechanism includes a transmission shaft (23) rotatably mounted on the outer shell (1). The transmission shaft (23) and the rotating shaft (10) are driven by a first sprocket mechanism. When the rotating shaft (10) rotates, it will drive the transmission shaft (23) to rotate synchronously. On one side of the other rotating shafts (10), there are driven shafts (27) rotatably mounted on the outer shell (1). The driven shafts (27) and the transmission shaft (23) are driven by a second sprocket mechanism. When the transmission shaft (23) rotates, it will drive the driven shafts (27) to rotate synchronously. The cam (33) and the driven shaft (27) are driven by a gear mechanism. When the driven shaft (27) rotates, it will drive the cam (33) to rotate.

7. An overload execution switch group for smart grid energy consumption priority allocation according to claim 6, characterized in that, The first sprocket mechanism includes a first sprocket (24) fixed on a rotating shaft (10) and a second sprocket (25) fixed on a transmission shaft (23). The first sprocket (24) and the second sprocket (25) are driven by a first chain (26).

8. An overload execution switch group for smart grid energy consumption priority allocation according to claim 6, characterized in that, The second sprocket mechanism includes a third sprocket (28) fixed on the drive shaft (23) and a fourth sprocket (29) fixed on the driven shaft (27), and the third sprocket (28) and the fourth sprocket (29) are driven by a second chain (30).

9. An overload execution switch group for smart grid energy consumption priority allocation according to claim 6, characterized in that, The gear mechanism includes a drive gear (31) fixed on a driven shaft (27) and a driven gear (32) fixed on a cam (33), wherein the driven gear (32) meshes with the cam (33).

10. An overload execution switch group for smart grid energy consumption priority allocation according to claim 4, characterized in that, The counterweight (22) is fixed with a slidable locking block inside the slide groove (38) and the second guide groove (35), and a stop block is fixed at one end of the locking block. The stop block and the counterweight (22) are respectively attached to the two end faces of the swing arm (11).

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