Circuit breaker integrated with adjustable hydraulic release

Abstract

The invention discloses a circuit breaker integrated with an adjustable hydraulic release. The circuit breaker comprises a circuit breaker body, wherein the adjustable hydraulic release, a release transmission mechanism and a main contact system are arranged in the circuit breaker body. The adjustable hydraulic release comprises a release body and an intelligent control module; the tripper body is provided with an oil cup, an oil cup iron core capable of axially moving, a pole shoe, a first coil and an armature, and the armature is linked with the tripping transmission mechanism. When the first coil is electrified, a first electromagnetic force is generated to push the oil cup iron core to move towards the pole shoe and finally attract the armature to trigger a tripping action so as to break a circuit. The intelligent control module is located at the end of the oil cup and can generate second electromagnetic force in the same direction or reverse direction as the first electromagnetic force to act on the oil cup iron core, and rated current adjustment and overload protection adjustment are achieved. According to the design, the problem that the protection characteristic of a traditional hydraulic electromagnetic release is fixed is solved, the number of synthesized ampere turns is equivalently changed through controllable second electromagnetic force, the rated current is flexibly adjusted, and the requirements of different devices are met.

Description

Technical Field

[0001] The present invention belongs to the technical field of circuit breakers, and in particular relates to a circuit breaker integrated with an adjustable hydraulic release. Background Art

[0002] With the development of power systems and the increasing requirements of users for the safety performance of electrical equipment, the performance of circuit breakers, as key components of circuit protection, directly affects the stability and safety of the entire power system.

[0003] Currently, circuit breakers use trip units to implement overcurrent protection. However, traditional trip units have certain limitations in practical applications:

[0004] 1. Thermal-electromagnetic release:

[0005] Temperature sensitivity: The operating characteristics of thermal-electromagnetic releases are highly dependent on ambient temperature. Especially under extreme temperature conditions (such as below -40°C or above +85°C), their operating stability will be significantly affected, causing changes in protection characteristics and thus affecting the reliability of the circuit breaker.

[0006] Limited rated current specifications: Due to design limitations, circuit breakers using thermal-electromagnetic releases can only provide a limited selection of rated current specifications. They cannot meet the needs of the same circuit breaker for multiple selective current protection in specific situations, which limits their applicability in different application scenarios.

[0007] 2. Electronic release:

[0008] Cost and size issues: Although electronic trip units can meet a wider range of rated current specifications and can adjust the overcurrent tripping multiple within a certain range, their high cost and large size are the main obstacles to their widespread application;

[0009] In addition, electronic components are sensitive to environmental conditions (such as humidity and vibration), which may affect their reliability in long-term use.

[0010] 3. Traditional hydraulic electromagnetic release:

[0011] Non-adjustable protection characteristics: Although traditional hydraulic electromagnetic releases can operate reliably over a wide temperature range (-40°C to +85°C) and have good rated current setting accuracy, their overcurrent protection characteristics are usually fixed and cannot be adjusted according to specific application requirements. This limits their application effectiveness in scenarios where flexible adjustment of protection characteristics is required. Summary of the Invention

[0012] The present invention aims to solve the above problems in the prior art and proposes an adjustable circuit breaker with an integrated adjustable hydraulic release, which has an adjustable overload protection function and is not affected by temperature.

[0013] The present invention can be achieved through the following technical solutions: A circuit breaker integrated with an adjustable hydraulic release, comprising: The circuit breaker body has an adjustable hydraulic trip unit, a trip transmission mechanism, and a main contact system; The adjustable hydraulic release includes a release body and an intelligent control module, wherein: The tripper body comprises an oil cup, an axially movable oil cup iron core, a pole shoe provided at the end of the oil cup, a first coil wound around the outer wall of the oil cup, and an armature, wherein the armature is linked to the tripping transmission mechanism; When the first coil is energized, a first electromagnetic force is generated to drive the oil cup core to move toward the pole shoe. When the oil cup core moves close to the pole shoe, the first electromagnetic force attracts the armature to rotate, and triggers the trip transmission mechanism to rotate to disconnect the main contact system. The intelligent control module is disposed at the end of the oil cup and is used to generate a second electromagnetic force in the same direction or opposite direction as the first electromagnetic force to act on the oil cup core. By adjusting the direction and magnitude of the second electromagnetic force, the following is achieved: Rated current adjustment: active adjustment to equivalently change the synthetic ampere-turns of the first coil; Overload protection adjustment: Based on the real-time current of the first coil, the direction and magnitude of the second electromagnetic force are automatically adjusted to dynamically control the time for the oil cup core to move to the pole shoe.

[0014] As a further improvement of the present invention, the intelligent control module is configured as follows: a control iron core, which is close to the end surface of the oil cup iron core; a second coil wound outside the control iron core; A DC power supply module is electrically connected to the second coil, and outputs a set current through the DC power supply module to cause the second coil to generate a specific DC magnetic flux and magnetize the control iron core, and the control iron core generates the second electromagnetic force on the oil cup iron core.

[0015] As a further improvement of the present invention, the intelligent control module is configured as follows: a second coil wound around the outside of the oil cup core; A DC power supply module is electrically connected to the second coil, and a set current is outputted by the DC power supply module to cause the second coil to generate a specific DC magnetic flux, which forms the second electromagnetic force applied to the oil cup core.

[0016] As a further improvement of the present invention, the oil cup is filled with silicone oil, and during the axial movement of the oil cup iron core, the flow of the silicone oil generates a physical damping force on the movement of the oil cup iron core; The second electromagnetic force generated by the intelligent control module generates an adjustable electromagnetic force on the movement of the oil cup iron core.

[0017] As a further improvement of the present invention, the physical damping force is superimposed on the adjustable electromagnetic force to form a composite force, and the composite force is used to accelerate or delay the time for the oil cup core to move toward the pole shoe.

[0018] As a further improvement of the present invention, the tripping transmission mechanism includes: A rotating frame connected to an external operating handle; A trip bracket, which is arranged in the rotating frame and the two are connected; A release member and a rotating shaft, wherein the rotating shaft is passed through the rotating frame, and the release member is sleeved on the rotating shaft and linked to the armature; A trip plate has one end hinged to the rotating frame, and the other end is locked with the trip bracket and the rotating shaft.

[0019] As a further improvement of the present invention, the release member has a first release portion and a second release portion, the first release portion is linked to the armature, and the second release portion is linked to the trip plate.

[0020] As a further improvement of the present invention, the trip plate is provided with a trip groove and has a locking position and a tripping position, wherein: When the trip plate is in the locked position, the second tripping portion abuts against the outer wall of the trip plate to restrict the rotation of the trip plate, and the trip bracket extends into the trip groove and abuts against the trip plate. At this time, the trip plate restricts the rotation of the trip bracket; When the trip plate is switched to the trip position, the armature attracts and pushes the first trip portion to rotate the trip member, and the second trip portion rotates to the position of the trip groove to release the limit on the trip plate. The trip plate rotates onto the second trip portion and causes the trip bracket to disengage from the trip groove.

[0021] As a further improvement of the present invention, the rotating frame is further connected to: A moving contact bracket, which is used to install the moving contact, and the moving contact and the fixedly installed static contact form a main contact system; A connecting rod, both ends of which are connected to the moving contact bracket and the rotating frame respectively; a trip spring, one end of which is connected to the top of the rotating frame, and the other end of which is connected to one end of the connecting rod for connecting to the rotating frame; When the trip plate is switched to the trip position, the trip spring pulls the connecting rod and the moving contact bracket upwards to separate the moving contact from the static contact.

[0022] As a further improvement of the present invention, an arc extinguishing chamber is further provided in the circuit breaker body, and the arc extinguishing chamber is composed of multiple layers of arc extinguishing grids. The main contact system is located in the arc extinguishing chamber, and the high-voltage arc generated when the main contact system is disconnected is extinguished by the arc extinguishing grids.

[0023] Compared with the prior art, the present invention has the following beneficial effects.

[0024] 1. Flexible and adjustable protection characteristics, balancing high reliability and intelligence: A second electromagnetic force (generated by an intelligent control module) is introduced into the adjustable hydraulic electromagnetic release built into the circuit breaker body, which can dynamically adjust the overload protection delay characteristics (overload delay, short-circuit acceleration), breaking through the limitation of "fixed protection characteristics" of traditional hydraulic electromagnetic releases.

[0025] 2. Breaking through space limitations and resolving the physical bottleneck of rated current adjustment: Given the limited size of the circuit breaker and the inability to increase the number of turns of the first coil, a controllable second electromagnetic force is applied through the intelligent control module to equivalently change the synthetic ampere-turns of the first coil, thereby achieving rated current adjustment to meet the specific rated current specifications required by different equipment.

[0026] 3. Precise control of tripping response: The physical damping force of silicone oil and the adjustable electromagnetic force of the intelligent control module form a composite effect. While retaining the inherent advantages of oil damping, the delay effect is dynamically adjusted through electromagnetic force to achieve precise time control. This not only delays the movement time of the oil cup core, but also achieves precise control of the tripping response time.

[0027] 4. Stable operation over a wide temperature range, free from temperature dependence: completely abandoning heat-sensitive components such as bimetallic strips, adopting silicone oil damping + electromagnetic drive mechanism. The viscosity of silicone oil changes little with temperature, ensuring consistency of operation within the range of -40°C to +85°C. The intelligent control module is a DC electromagnetic system and is less affected by ambient temperature.

[0028] 5. Double-stage interlocking mechanical transmission mechanism ensures reliable operation and prevents false operation: The tripping transmission mechanism adopts the "double-stage interlocking + lever trigger + spring drive" design: the tripping bracket is embedded in the tripping groove of the tripping plate (first-stage locking) + the release piece limits the outer wall of the tripping plate (second-stage locking). The two-stage lock must be released at the same time to trip, effectively preventing false operation caused by vibration and impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a cross-sectional view of a circuit breaker integrated with an adjustable hydraulic release according to the present invention; Figure 2 It is a partial schematic diagram of the connection between the trip bracket, the release member and the trip plate of the present invention; Figure 3 The present invention Figure 2 A partial schematic diagram from another perspective; Figure 4 is a cross-sectional view of an adjustable hydraulic release according to a first embodiment of the present invention; Figure 5 It is a cross-sectional view of an adjustable hydraulic release according to a second embodiment of the present invention.

[0030] In the figure, 100, circuit breaker body; 200, adjustable hydraulic release; 210, release body; 211, magnetic yoke; 212, oil cup; 213, oil cup core; 214, oil cup spring; 215, pole shoe; 216, first coil; 217, armature; 218, armature spring; 220, intelligent control module; 221, control core; 222, second coil; 223, DC power supply module; 224, plastic fixing sleeve; 2241, first installation space; 2242, second installation space; 300, rotating frame; 301, operating handle; 310, trip bracket; 320, tripping member; 321, first tripping portion; 322, second tripping portion; 330, rotating shaft; 340, tripping plate; 341, tripping slot; 350, moving contact bracket; 351, moving contact; 360, static contact; 370, connecting rod; 380, trip spring; 400, arc extinguishing chamber; 410, arc extinguishing grid. DETAILED DESCRIPTION

[0031] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical method of the present invention, but the present invention is not limited to these embodiments.

[0032] Example 1

[0033] like Figure 1-Figure 4 As shown, the present invention provides a circuit breaker integrated with an adjustable hydraulic release, comprising: The circuit breaker body 100 has an adjustable hydraulic trip 200, a trip transmission mechanism, and a main contact system built into it; The adjustable hydraulic release 200 includes a release body 210 and an intelligent control module 220, wherein: The trip unit body 210 comprises a yoke 211, an oil cup 212, an axially movable oil cup core 213, an oil cup spring 214 disposed at the end of the oil cup core 213, a pole piece 215 disposed at the end of the oil cup 212, a first coil 216 wound around the outer wall of the oil cup 212, an armature 217, and an armature spring 218. The armature 217 is interlocked with the trip transmission mechanism. When the first coil 216 is energized, it generates a first electromagnetic force that drives the oil cup core 213 toward the pole shoe 215. When the oil cup core 213 moves close to the pole shoe 215, the first electromagnetic force attracts the armature 217 to rotate, triggering the trip transmission mechanism to rotate and disconnect the main contact system. The intelligent control module 220 is disposed at the end of the oil cup 212 and is used to generate a second electromagnetic force acting in the same or opposite direction as the first electromagnetic force to act on the oil cup core 213. By adjusting the direction and magnitude of the second electromagnetic force, the following is achieved: The rated current adjustment function (active adjustment) is configured as follows: the user actively adjusts the direction and magnitude of the second electromagnetic force to equivalently change the resultant ampere-turns of the first coil 216 to meet the requirements of different rated current specifications. For example, if the rated current of the first coil 216 is 40A, but the supporting equipment requires a rated current of 60A, the second electromagnetic force is set in the same direction as the first electromagnetic force and acts on the oil cup core 213 to compensate for the 20A rated current difference. The same principle applies vice versa, thus flexibly adapting to various application scenarios. The overload protection adjustment function (automatic adjustment) is configured as follows: the PCB board of the intelligent control module 220 monitors the size of the loop circuit in real time, and based on the comparative analysis of the first electromagnetic force of the first coil 216, automatically adjusts the direction and size of the second electromagnetic force to dynamically control the time it takes for the oil cup core 213 to move to the pole shoe 215, thereby achieving overload protection characteristic adjustment, that is, achieving controllable adjustment of the tripping action time; In the case of a continuous overload, the intelligent control module 220 adjusts the direction of the second electromagnetic force to be opposite to the first electromagnetic force, delaying the tripping time to avoid false tripping caused by a short-term overload or starting current; In the case of a short circuit, the intelligent control module 220 adjusts the direction of the second electromagnetic force to be the same as the first electromagnetic force, further improving the tripping speed and ensuring the reliability of instantaneous protection.

[0034] Generally speaking, the tripping action of the circuit breaker of the present invention is based on the principle of combining electromagnetic-hydraulic compound drive with intelligent electromagnetic control, and its working process can be divided into three stages.

[0035] 1. Electromagnetic drive stage When an overcurrent (such as a short circuit or severe overload) occurs in the main circuit, the current flowing through the first coil 216 increases rapidly, generating a strong magnetic field, forming a first electromagnetic force that pushes the oil cup core 213 to move toward the pole shoe 215.

[0036] 2. Hydraulic damping and time control stage The oil cup 212 is filled with silicone oil, and the oil cup iron core 213 squeezes the silicone oil during movement. The silicone oil flows through the tiny gap between the inner wall of the oil cup 212 and the iron core, forming a physical damping force. This damping force slows down the movement speed of the iron core, achieving a delay characteristic similar to "hydraulic pressure", ensuring no false operation under instantaneous impact current, and having good inverse time protection characteristics.

[0037] At the same time, the intelligent control module 220 applies an adjustable additional force to the oil cup core 213 through the second electromagnetic force: When the tripping response needs to be accelerated (such as a large short-circuit current), the second electromagnetic force is superimposed on the first electromagnetic force in the same direction to accelerate the movement of the iron core. When the action time needs to be extended (such as a slight overload), the second electromagnetic force reversely offsets part of the first electromagnetic force and slows down the advancement of the iron core, thereby achieving dynamic and precise overload protection time adjustment.

[0038] 3. Mechanical triggering and contact disconnection stage When the oil cup core 213 approaches the pole shoe 215, the magnetic circuit tends to close, and the magnetic flux density rises sharply, generating a sufficiently strong attraction force to attract and rotate the armature 217. The armature 217 drives the trip transmission mechanism to separate the moving contact 351 from the static contact 360, completing the circuit disconnection. The arc extinguishing grid 410 in the arc extinguishing chamber 400 quickly stretches and cools the arc, achieving safe arc extinguishing.

[0039] It is worth mentioning that, compared with the conventional hydraulic electromagnetic release, thermal-electromagnetic release, and electronic release, the adjustable hydraulic electromagnetic release provided in this embodiment solves the defects of the above three releases.

[0040] 1. Problems with the non-adjustable protection characteristics of traditional hydraulic electromagnetic releases: Although traditional hydraulic electromagnetic releases can operate within a wide temperature range, their overcurrent protection characteristics are usually fixed and cannot be adjusted according to specific application requirements.

[0041] The adjustable hydraulic electromagnetic release provided in this embodiment introduces an intelligent control module 220, which generates a same-direction or reverse electromagnetic force by outputting a set DC current, thereby accelerating or delaying the movement time of the oil cup iron core 213, thereby achieving precise control of the tripping response time. The user can flexibly adjust the protection characteristics of the release according to actual needs, thereby enhancing the adaptability and flexibility of the equipment and meeting the needs of different application scenarios. In addition, the adjustable overload protection function is not affected by temperature.

[0042] 2. Temperature sensitivity of thermal-electromagnetic release: The operating characteristics of traditional thermal-electromagnetic releases are highly dependent on the ambient temperature and may not work stably under extreme temperature conditions (such as below -40°C or above +85°C).

[0043] The adjustable hydraulic electromagnetic release provided in this embodiment uses silicone oil as a damping medium. Silicone oil has a low viscosity temperature variation coefficient, which enables the release to operate stably in a wide temperature range of -40°C to +85°C. In addition, the introduced intelligent control module 220 is also not affected by temperature.

[0044] 3. Cost and size issues of electronic trip units: Electronic trip units can achieve more rated current specifications and a certain adjustment range, but their high cost and large size limit their widespread application.

[0045] In general, the adjustable hydraulic electromagnetic release provided in this embodiment detects the loop current and compares the electromagnetic force of the first coil 216 to give the corresponding current direction and current magnitude of the second coil 222, thereby achieving the selection of multiple rated current specifications. In addition, the intelligent control module 220 is used to achieve precise control of the tripping response time, eliminating the need for complex electronic components, reducing manufacturing costs and equipment size, while maintaining high-precision current setting capabilities and flexible protection characteristic adjustment capabilities.

[0046] This innovative design provides a more reliable, efficient and economical circuit protection solution for the power system, greatly improves the safety and stability of electrical equipment, and provides a highly reliable, highly adaptable and low-cost intelligent protection solution for medium and low voltage circuit breakers.

[0047] In addition, regarding the rated current adjustment function, it should be added that in the actual design and manufacture of circuit breakers, the installation space is highly limited, and the trip module must implement all functions within a limited volume. Therefore, the first coil 216, which generates the main driving electromagnetic force, has its winding space, wire diameter, and total number of turns subject to strict physical limitations. To address the above problem, by integrating the intelligent control module 220 in the trip unit and introducing a controllable second electromagnetic force, the bottleneck of the number of turns of the first coil 216 due to space limitations is cleverly circumvented. This allows the rated current to be flexibly adjusted without changing the number of turns of the first coil 216 or increasing the size of the trip unit.

[0048] Without increasing the volume or changing the structure of the first coil 216, the flexible adjustment of the rated current is achieved through electromagnetic force superposition control technology. This is one of the key innovations of the present invention in the design of compact and intelligent circuit breakers, and has outstanding practical value and industrial advantages.

[0049] In summary, the present invention achieves at least the following breakthrough improvements by introducing a controllable second electromagnetic force into the traditional hydraulic electromagnetic tripping structure:

[0050] 1. Flexible and adjustable protection characteristics are achieved without sacrificing environmental adaptability and reliability: It retains the advantages of the hydraulic structure of being insensitive to temperature and having strong anti-electromagnetic interference capabilities, while achieving intelligent protection through electromagnetic regulation, taking into account the high reliability of mechanical releases and the functional flexibility of electronic releases.

[0051] 2. Break through space limitations, achieve multi-level adjustable rated current, and improve product versatility and adaptability: Under the premise that the internal space of the circuit breaker is limited and the number of turns of the first coil 216 cannot be increased, an adjustable second electromagnetic force is applied through the intelligent control module 220 to equivalently adjust the synthetic magnetomotive force. This can adapt to different rated current requirements without replacing the coil or the trip unit body 210. The same model of circuit breaker can cover multiple current levels, significantly reducing product models and lowering production, inventory and operation and maintenance costs.

[0052] 3. It avoids the temperature dependence of thermal elements and solves the problem of performance drift of traditional trip units under extreme temperatures: The system completely eliminates heat-sensitive components such as bimetallic strips, and the tripping action is based on an electromagnetic-hydraulic mechanism, ensuring that the protection characteristics remain highly consistent when starting at low temperatures of -40°C or operating at high temperatures of +85°C, making it suitable for applications in harsh environments.

[0053] 4. It achieves functional flexibility close to that of electronic trip units at a lower cost, combining high cost performance with high performance: Without the need for complex microprocessors, A / D sampling circuits, and high-power power supply modules, multi-level protection settings can be achieved simply by DC regulating the current in the second coil 222, significantly reducing the complexity and manufacturing cost of the electronic system and being suitable for large-scale promotion and application.

[0054] 5. The structural design is reasonable and easy to integrate and transform on the existing circuit breaker platform, with good engineering application prospects: The adjustable hydraulic release 200 can be embedded into the existing circuit breaker architecture as a modular component without the need to redesign the entire arc extinguishing system or operating mechanism, facilitating product upgrades and shortening the R&D cycle.

[0055] The following is a detailed description of the adjustable hydraulic release 200

[0056] Preferably, the intelligent control module 220 is configured as follows: The control core 221 is close to the end surface of the oil cup core 213; The second coil 222 is wound around the outside of the control core 221; The DC power supply module 223 is electrically connected to the second coil 222. The DC power supply module 223 outputs a set current so that the second coil 222 generates a specific DC magnetic flux and magnetizes the control core 221. The control core 221 generates an attraction or thrust (i.e., a second electromagnetic force) on the oil cup core 213, thereby adjusting the speed at which the oil cup core 213 moves toward the pole shoe 215.

[0057] The operating principle is described as follows: When an overcurrent occurs in the main circuit of the circuit breaker, the first coil 216 (the main excitation coil) is energized to generate a first electromagnetic force, driving the oil cup core 213 to accelerate toward the pole shoe 215. At the same time, according to the preset protection characteristics, the DC power supply module 223 outputs a controllable DC current to the second coil 222. This current establishes a stable DC magnetic flux in the control core 221. Since the control core 221 faces the end surface of the oil cup core 213, the control core 221 generates an axial suction or thrust (i.e., a second electromagnetic force) on the oil cup core 213. The second electromagnetic force acts on the initial stage and acceleration of the movement of the oil cup core 213. Since the magnitude of the second electromagnetic force is controllable (by adjusting the magnitude of the DC current), the time required for the oil cup core 213 to reach the pole shoe 215 can be accurately controlled, thereby achieving adjustable tripping action time.

[0058] Furthermore, the control core 221 is coaxially arranged with the oil cup core 213. The second electromagnetic force generated by the control core 221 acts on the axial end face of the oil cup core 213, forming an end-face magnetic coupling structure. This minimizes the magnetic flux path and losses, significantly improving magnetic field efficiency and system response speed, and ensuring a rapid response to overcurrent conditions. In addition, by precisely adjusting the current output by the DC power supply module 223, the intensity of the second electromagnetic force can be flexibly adjusted, achieving fine control of the tripping time and meeting the protection characteristics required in different application scenarios. In addition, this compact design not only reduces the overall size of the equipment, making it easier to integrate into miniaturized or compact circuit breakers, but also improves space utilization, which is in line with the development trend of miniaturization of modern electrical equipment. At the same time, since there are no complex mechanical components involved in the adjustment process, it only relies on stable electromagnetic effects for control, which greatly reduces the failure rate and improves the long-term operation stability and reliability of the system.

[0059] Furthermore, the following is an overall layout description of the intelligent control module 220 in this embodiment: The intelligent control module 220 further includes a plastic fixing sleeve 224 , which is sleeved on the end of the oil cup 212 and used to mount the control iron core 221 and the second coil 222 , thereby ensuring the structural stability and electromagnetic performance of the entire intelligent control module 220 .

[0060] Specifically, the plastic fixing sleeve 224 is divided into a first installation space 2241 and a second installation space 2242, wherein: The first mounting space 2241 is coaxially arranged with the oil cup core 213 and is used to mount the control core 221, ensuring precise alignment between the control core 221 and the oil cup core 213. Furthermore, the shape of the first mounting space 2241 matches the control core 221, firmly securing the control core 221 and preventing displacement or deflection during operation, thereby ensuring the stability of the magnetic field and the effective transmission of the electromagnetic force. The second installation space 2242 surrounds the outside of the first installation space 2241 and is used to install the second coil 222. This surround design allows the second coil 222 to tightly surround the control iron core 221, optimizes the magnetic flux path, and improves the magnetic field efficiency. In addition, by placing the second coil 222 in an independent second installation space 2242, not only can good electrical isolation be achieved to avoid external interference, but it can also provide additional physical protection for the coil and extend its service life.

[0061] Overall, this layout not only optimizes the magnetic field path, reduces air gaps and magnetic resistance, but also ensures the efficient transmission of the second electromagnetic force, improving the accuracy and response speed of tripping time adjustment. At the same time, the modular layout simplifies the assembly process, reduces production costs, and provides good sealing, thereby improving the equipment's protection level and long-term operational reliability.

[0062] It is also worth mentioning that the adjustable hydraulic electromagnetic release provided in this embodiment also has a composite damping force, which further enhances its control accuracy and flexibility, as described in detail below: First, the oil cup 212 is filled with silicone oil. When the oil cup core 213 is driven axially by the first electromagnetic force under overcurrent conditions, the flow of silicone oil generates a physical damping force on the oil cup core 213. This physical damping force slows down the movement of the oil cup core 213 through the viscous resistance of the liquid, thus providing a time delay. Furthermore, the viscosity of the silicone oil is less affected by temperature changes, ensuring consistent performance of the trip unit over a wide temperature range. Secondly, the second electromagnetic force generated by the intelligent control module 220 generates an adjustable electromagnetic force on the movement of the oil cup core 213. This adjustable electromagnetic force is achieved by magnetizing the control core 221 by outputting a set current through the DC power supply module 223, applying a suction force or a thrust force to the oil cup core 213, thereby adjusting the movement time of the oil cup core 213 toward the pole shoe 215. The two damping forces - physical damping force and adjustable electromagnetic force - are superimposed to form a composite force. While retaining the inherent advantages of physical damping force, the delay effect is dynamically adjusted by electromagnetic force, thereby achieving precise control of the tripping response time and improving the overall stability and reliability of the system. By adjusting the output current of the intelligent control module 220, the intensity of the adjustable electromagnetic force can be flexibly adjusted, thereby fine-tuning the tripping time according to actual needs to meet the protection requirements in different application scenarios.

[0063] In summary, this composite damping mechanism combines the physical damping of silicone oil with the adjustable electromagnetic force generated by the intelligent control module 220, significantly enhancing the adjustment capability and adaptability of the trip unit and providing an efficient and reliable overcurrent protection solution. It not only optimizes the time control of the tripping action, but also improves the stability and durability of the equipment in complex environments.

[0064] The following is a detailed description of the tripping structure and principle of the circuit breaker body 100.

[0065] Preferably, the tripping transmission mechanism includes: A rotating frame 300 connected to an external operating handle 301; A trip bracket 310 is disposed in the rotating frame 300 and connected to the rotating frame 300; The release member 320 and the rotating shaft 330 are provided through the rotating frame 300. The release member 320 is rotatably provided on the rotating shaft 330 and is linked to the armature 217. One end of the trip plate 340 is hinged to the rotating frame 300 , and the other end thereof forms a locking fit with the trip bracket 310 and the release member 320 .

[0066] The release member 320 includes a first release portion 321 and a second release portion 322 . The first release portion 321 is in linkage with the armature 217 , and the second release portion 322 is in linkage with the trip plate 340 .

[0067] Specifically, the trip plate 340 is provided with a trip slot 341 and has a locking position and a tripping position, wherein: When the trip plate 340 is in the locked position, the second tripping portion 322 abuts against the outer wall of the trip plate 340 to restrict the rotation of the trip plate 340. The trip bracket 310 extends into the trip groove 341 and abuts against the trip plate 340. At this time, the trip plate 340 restricts the rotation of the trip bracket 310. When the trip plate 340 is switched to the trip position, the armature 217 attracts and pushes the first trip portion 321 to rotate the trip member 320. The second trip portion 322 rotates to the position of the trip groove 341 to release the limit on the trip plate 340. The trip plate 340 rotates onto the second trip portion 322 and the trip bracket 310 is disengaged from the trip groove 341.

[0068] In addition, the rotating frame 300 is also connected to: A movable contact bracket 350 is used to mount a movable contact 351. The movable contact 351 and a fixedly mounted static contact 360 form a main contact system. A connecting rod 370, whose two ends are respectively connected to the moving contact bracket 350 and the rotating frame 300; A trip spring 380 , one end of which is connected to the top of the rotating frame 300 , and the other end of which is connected to one end of the connecting rod 370 for connecting to the rotating frame 300 ; When the trip plate 340 is switched to the trip position, the trip spring 380 pulls the connecting rod 370 and the movable contact bracket 350 upwards, so that the movable contact 351 is separated from the static contact 360 .

[0069] Detailed explanation of the tripping process principle (full-stage action flow) The tripping transmission mechanism of the present invention realizes a complete automatic protection process from fault signal sensing to main contact disconnection through a precise mechanical linkage design. The entire tripping process can be divided into four stages:

[0070] Phase 1: Fault Detection and Signal Triggering When overcurrent occurs in the main circuit (such as short circuit or overload): An abnormal current flows through the first coil 216 in the adjustable hydraulic release 200, generating a first electromagnetic force. Driven by the first electromagnetic force, the oil cup core 213 overcomes the silicon hydraulic pressure and moves toward the pole shoe 215. When the core approaches the pole shoe 215, the magnetic flux density increases sharply, and the armature 217 is quickly attracted, generating mechanical rotation.

[0071] Phase 2: Linkage unlocking (unfastening element 320 degrees) After the armature 217 is attracted, it pushes its linkage component, the first release portion 321 of the release member 320, and the release member 320 rotates around its rotation axis 330. The second release portion 322 at the other end rotates accordingly, and the position originally pressed against the outer wall of the trip plate 340 is released. The trip plate 340 loses the limiting constraint from the second release portion 322 and enters a freely rotatable state.

[0072] Phase 3: Lock release (trip plate 340 and trip bracket 310 are decoupled) After losing the limit, the trip plate 340 begins to rotate around its hinge point in the tripping direction, and the trip groove 341 on the trip plate 340 rotates and shifts accordingly. The trip bracket 310 originally embedded in the trip groove 341 is released and disengaged from the trip groove 341. At this point, the rotational freedom of the rotating frame 300 is completely released.

[0073] Stage 4: Main contacts quickly disconnect Once the trip bracket 310 is disengaged, the energy stored in the trip spring 380 is released, pulling the connecting rod 370 upward. The connecting rod 370 drives the moving contact bracket 350 to rise rapidly, and the moving contact 351 is separated from the static contact 360, and the circuit is physically disconnected. At the same time, the arc enters the arc extinguishing chamber 400 and is divided and cooled by the arc extinguishing grid 410, completing the arc extinguishing.

[0074] The tripping transmission mechanism adopts a composite mechanism of "double-stage interlocking + lever triggering + spring drive", which has the following significant advantages:

[0075] 1. High reliability locking to prevent accidental tripping Adopts double mechanical locking mechanism: First stage: The trip bracket 310 is locked into the trip groove 341 of the trip plate 340, restricting the movement of the rotating frame 300; Second stage: the second release portion 322 of the release member 320 abuts against the outer wall of the trip plate 340 to prevent the trip plate 340 from rotating on its own.

[0076] Among them, the two-level locking forms a "logical AND" relationship, and both conditions must be met at the same time to unlock, which greatly improves the stability in the closed state and effectively resists external disturbances such as vibration, impact, and electromagnetic interference.

[0077] 2. Sensitive and reliable unbuttoning response By using the release member 320 as an intermediate transmission member, the small-stroke attraction action of the armature 217 is converted into a clear release instruction for the trip plate 340. The lever structure has a force amplification effect, and even if the driving force of the armature 217 is small, it can reliably trigger subsequent actions.

[0078] 3. Clear action sequence to avoid jamming The entire tripping process follows a strict sequential logic: first, the trip plate 340 limit is released, then the trip bracket 310 is released, and finally, the trip spring 380 drives the main contact system to disconnect. The movement path of each component is clear and there is no cross-interference, avoiding jamming caused by assembly errors or wear.

[0079] 4.Support fast breaking and high breaking ability The trip spring 380 is pre-energized and drives the contacts 351 to separate immediately after the lock is released. The breaking speed is not affected by the operating speed. The spring force can be optimized according to the breaking capacity requirements to meet the requirements of rapid opening under high short-circuit currents. In conjunction with the arc extinguishing system, the current limiting performance and electrical life of the circuit breaker are significantly improved.

[0080] 5. Compact structure, conducive to miniaturization integration All components are centrally arranged around the rotating frame 300, which has high space utilization and can be modularly integrated with the adjustable hydraulic release 200, making it easy to replace and upgrade in the existing circuit breaker platform.

[0081] Example 2 like Figure 5 As shown, the difference between the second embodiment and the first embodiment is that the second embodiment provides an adjustable hydraulic release 200 of another structure, and its intelligent control module 220 adopts a different configuration, which is specifically described as follows:

[0082] Preferably, the intelligent control module 220 is configured as follows: The second coil 222 is wound around the outside of the oil cup core 213; The DC power supply module 223 is electrically connected to the second coil 222 . The DC power supply module 223 outputs a set current to enable the second coil 222 to generate a specific DC magnetic flux. The DC magnetic flux forms a second electromagnetic force applied to the oil cup core 213 .

[0083] Unlike the first embodiment, the second embodiment adopts a circumferential magnetic coupling structure, that is, the second coil 222 is directly mounted on the outer periphery of the oil cup core 213. After power is applied, an axially distributed DC magnetic field is established around the oil cup core 213, and a second electromagnetic force is generated on the oil cup core 213 using the principle of electromagnetic induction. The direction of the second electromagnetic force is the same as or opposite to the direction of the first electromagnetic force generated by the first coil 216, achieving the same effect as the solution in the first embodiment.

[0084] Specifically, the plastic fixing sleeve 224 is sleeved on the end of the oil cup 212 and is used to install the second coil 222. In particular, one end of the oil cup core 213 extends into the plastic fixing sleeve 224 so that the DC magnetic flux generated by the second coil 222 is applied to the radial circumference of the oil cup core 213.

[0085] This structural design eliminates the complex separation space in the independent control iron core 221 and the plastic fixing sleeve 224, making the structure simpler and easier to assemble. At the same time, it reduces the number of parts, which is conducive to reducing manufacturing costs and improving reliability. By adjusting the output current of the DC power supply module 223, the second electromagnetic force can still be precisely controlled, thereby achieving adjustability of the tripping time.

[0086] It is also worth mentioning that the two solutions provided in Example 1 and Example 2 act on the oil cup core 213 at different positions and intensities, and can be applied to different characteristic curve requirements: In the first embodiment, the intelligent control module 220 generates a second electromagnetic force by controlling the iron core 221, which acts on the axial end face of the oil cup iron core 213, forming an end-face magnetic coupling structure. This design provides a stronger second electromagnetic force and is suitable for applications requiring a larger damping force to slow the movement of the oil cup iron core 213, particularly those requiring a longer trip time or heavy loads. In the second embodiment, the second coil 222 is wound directly around the outer circumference of the oil cup core 213, generating a second electromagnetic force through radially applied DC magnetic flux. This method generates a relatively uniform electromagnetic force with a wider range of action, making it suitable for scenarios requiring fine-tuning of trip response time. Its more compact structure and reduced component count make it more suitable for space-constrained or cost-sensitive applications.

[0087] These two solutions can meet diverse protection requirements through different mechanical layouts and electromagnetic force application methods. Users can choose the appropriate solution based on the specific application scenario to achieve the best overcurrent protection effect.

[0088] Whether strong electromagnetic damping force or precise timing control is required, these two designs can provide flexible and efficient solutions, enhancing the circuit breaker's ability to adapt to different working conditions.

[0089] The technical means disclosed in the solutions of the present invention are not limited to the technical means disclosed in the above technical means, but also include technical solutions composed of any combination of the above technical features. The above is a specific embodiment of the present invention. It should be noted that for those skilled in the art, without departing from the principles of the present invention, various improvements and modifications can be made, and such improvements and modifications are also considered to be within the scope of protection of the present invention.

[0090] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0091] In addition, in the present invention, descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly defined. The terms "connected", "fixed", etc. should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0092] The technical solutions between the various embodiments of the present invention can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0093] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. A circuit breaker integrated with an adjustable hydraulic release, characterized in that: include: The circuit breaker body has an adjustable hydraulic trip unit, a trip transmission mechanism, and a main contact system; The adjustable hydraulic release includes a release body and an intelligent control module, wherein: The tripper body comprises an oil cup, an axially movable oil cup iron core, a pole shoe provided at the end of the oil cup, a first coil wound around the outer wall of the oil cup, and an armature, wherein the armature is linked to the tripping transmission mechanism; When the first coil is energized, a first electromagnetic force is generated to drive the oil cup core to move toward the pole shoe. When the oil cup core moves close to the pole shoe, the first electromagnetic force attracts the armature to rotate, and triggers the trip transmission mechanism to rotate to disconnect the main contact system. The intelligent control module is disposed at the end of the oil cup and is used to generate a second electromagnetic force in the same direction or opposite direction as the first electromagnetic force to act on the oil cup core. By adjusting the direction and magnitude of the second electromagnetic force, the following is achieved: Rated current adjustment: active adjustment to equivalently change the synthetic ampere-turns of the first coil; Overload protection adjustment: Based on the real-time current of the first coil, the direction and magnitude of the second electromagnetic force are automatically adjusted to dynamically control the time for the oil cup core to move to the pole shoe.

2. A circuit breaker integrated with an adjustable hydraulic release according to claim 1, characterized in that: The intelligent control module is configured as follows: a control iron core, which is close to the end surface of the oil cup iron core; a second coil wound outside the control iron core; A DC power supply module is electrically connected to the second coil, and outputs a set current through the DC power supply module to cause the second coil to generate a specific DC magnetic flux and magnetize the control iron core, and the control iron core generates the second electromagnetic force on the oil cup iron core.

3. The circuit breaker integrated with an adjustable hydraulic release according to claim 1, characterized in that: The intelligent control module is configured as follows: a second coil wound around the outside of the oil cup core; A DC power supply module is electrically connected to the second coil, and a set current is outputted by the DC power supply module to cause the second coil to generate a specific DC magnetic flux, which forms the second electromagnetic force applied to the oil cup core.

4. A circuit breaker integrated with an adjustable hydraulic release according to claim 1, characterized in that: The oil cup is filled with silicone oil, and during the axial movement of the oil cup core, the flow of the silicone oil generates a physical damping force on the movement of the oil cup core; The second electromagnetic force generated by the intelligent control module generates an adjustable electromagnetic force on the movement of the oil cup iron core.

5. A circuit breaker integrated with an adjustable hydraulic release according to claim 4, characterized in that: The physical damping force and the adjustable electromagnetic force are superimposed to form a composite force, which accelerates or delays the time for the oil cup iron core to move toward the pole shoe.

6. The circuit breaker integrated with an adjustable hydraulic release according to claim 1, characterized in that: The tripping transmission mechanism comprises: A rotating frame connected to an external operating handle; A trip bracket, which is arranged in the rotating frame and the two are connected; A release member and a rotating shaft, wherein the rotating shaft is passed through the rotating frame, and the release member is sleeved on the rotating shaft and linked to the armature; A trip plate has one end hinged to the rotating frame, and the other end is locked with the trip bracket and the rotating shaft.

7. A circuit breaker integrated with an adjustable hydraulic release according to claim 6, characterized in that: The release member comprises a first release portion and a second release portion, wherein the first release portion is in linkage with the armature, and the second release portion is in linkage with the trip plate.

8. A circuit breaker integrated with an adjustable hydraulic release according to claim 7, characterized in that: The trip plate is provided with a trip groove and has a locking position and a tripping position, wherein, When the trip plate is in the locked position, the second tripping portion abuts against the outer wall of the trip plate to restrict the rotation of the trip plate, and the trip bracket extends into the trip groove and abuts against the trip plate. At this time, the trip plate restricts the rotation of the trip bracket; When the trip plate is switched to the trip position, the armature attracts and pushes the first trip portion to rotate the trip member, and the second trip portion rotates to the position of the trip groove to release the limit on the trip plate. The trip plate rotates onto the second trip portion and causes the trip bracket to disengage from the trip groove.

9. The circuit breaker integrated with an adjustable hydraulic release according to claim 8, characterized in that: The rotating frame is further connected with: A moving contact bracket, which is used to install the moving contact, and the moving contact and the fixedly installed static contact form a main contact system; A connecting rod, both ends of which are connected to the moving contact bracket and the rotating frame respectively; a trip spring, one end of which is connected to the top of the rotating frame, and the other end of which is connected to one end of the connecting rod for connecting to the rotating frame; When the trip plate is switched to the trip position, the trip spring pulls the connecting rod and the moving contact bracket upwards to separate the moving contact from the static contact.

10. The circuit breaker integrated with an adjustable hydraulic release according to claim 1, characterized in that: An arc extinguishing chamber is further provided in the circuit breaker body. The arc extinguishing chamber is composed of multiple layers of arc extinguishing grids. The main contact system is located in the arc extinguishing chamber. The arc extinguishing grids are used to extinguish the high-voltage arc generated when the main contact system is disconnected.

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