阅读说明：本技术 液压电磁式断路器的快速动作机构及具有其的断路器 (Quick action mechanism of hydraulic electromagnetic type circuit breaker and circuit breaker with quick action mechanism ) 是由 施宏伟 孙良权 李一炜 刘福 周泉淼 黄杰 陈林生 胡媛 于 2021-06-29 设计创作，主要内容包括：传统的液压电磁式断路器在过载和短路时,靠工作衔铁吸合断路,实现过载和短路保护。这样的保护方式耗时长,并且在应对较大的短路电流时可靠性不足。为了解决上述问题,本发明采用了以下的技术方案：液压电磁式断路器的快速动作机构,包括动触头杆,以及铆接在所述动触头杆上的磁轭与快动衔铁,所述磁轭与动触头杆联动,所述快动衔铁设置在所述动触头杆一端,能够相对动触头杆灵活转动,所述磁轭与所述快动衔铁通过弹性装置相连；所述锁扣设置在所述快动衔铁的转动路径上,所述动触头杆另一端还设有动触头,所述动触头杆的转动路径上对应设有静触头。本方案中的快速动作机构能够在2-5ms内快速解锁断路,实现快速可靠的短路保护。(When the traditional hydraulic electromagnetic circuit breaker is overloaded and short-circuited, the circuit breaker is closed by the actuation of the working armature, so that the overload and short-circuit protection is realized. Such protection is time-consuming and is not reliable enough to handle large short-circuit currents. In order to solve the problems, the invention adopts the following technical scheme: the quick action mechanism of the hydraulic electromagnetic circuit breaker comprises a movable contact rod, and a magnetic yoke and a quick action armature which are riveted on the movable contact rod, wherein the magnetic yoke is linked with the movable contact rod, the quick action armature is arranged at one end of the movable contact rod and can flexibly rotate relative to the movable contact rod, and the magnetic yoke is connected with the quick action armature through an elastic device; the lock catch is arranged on a rotating path of the quick-acting armature, a moving contact is further arranged at the other end of the moving contact rod, and a static contact is correspondingly arranged on the rotating path of the moving contact rod. The quick action mechanism in the scheme can quickly unlock the open circuit within 2-5ms, and quick and reliable short circuit protection is realized.)

1. The utility model provides a quick operating mechanism of hydraulic pressure magnetic circuit breaker which characterized in that: a movable contact rod (4) is rotationally arranged in the shell, and a magnetic yoke (2) and a quick-acting armature (1) are riveted on the movable contact rod (4), the magnetic yoke (2) is linked with the movable contact rod (4), the quick-acting armature (1) is arranged at one end of the movable contact rod (4) and can flexibly rotate relative to the movable contact rod (4), and the magnetic yoke (2) is connected with the quick-acting armature (1) through an elastic device; the lock catch (8) is arranged on a rotating path of the quick-acting armature (1), when the short circuit occurs, the magnet yoke (2) can be electrified to attract the quick-acting armature (1), and when the quick-acting armature (1) rotates, the lock catch (8) is shifted to enable the lock catch (8) and the buckle piece to be disengaged, so that the open circuit is completed; the moving contact is characterized in that a moving contact (7) is further arranged at the other end of the moving contact rod (4), a static contact (6) is correspondingly arranged on a rotating path of the moving contact rod (4), during closing, the moving contact rod (4) moves downwards, the moving contact (7) is abutted to the static contact (6), during circuit breaking, the moving contact (7) is separated from the static contact (6), the moving contact rod (4) comprises two linked swing arms, the moving contact (7) is arranged at one end of each of the two swing arms, the static contacts (6) corresponding to the two swing arms are arranged on a swinging path of the two swing arms respectively, and the magnet yoke (2) and the quick-acting armature (1) are arranged on one of the swing arms.

2. The quick action mechanism of a hydraulic electromagnetic circuit breaker according to claim 1, characterized in that: the elastic device is a spring (3), the spring (3) penetrates through a rivet (5) for fixing the quick-acting armature (1) and is fixed on the movable contact rod (4), and the two spring (3) angles respectively abut against the quick-acting armature (1) and the magnet yoke (2).

3. The quick action mechanism of a hydraulic electromagnetic circuit breaker according to claim 1, characterized in that: the quick-acting armature (1) extends outwards to be provided with a poking arm, and when the short circuit occurs, the poking arm pokes the lock catch (8) to enable the lock catch (8) and the buckle piece to be disengaged, so that the open circuit is completed.

4. A hydraulic electromagnetic circuit breaker is characterized in that: quick action mechanism comprising a hydraulic electromagnetic circuit breaker according to any one of claims 1 to 3.

5. The hydraulic electromagnetic circuit breaker according to claim 4, characterized in that: the electromagnetic circuit breaker is also provided with a short circuit overload release (9) in parallel.

6. A hydraulic electromagnetic circuit breaker according to claim 5, characterized in that: the short circuit overload release (9) is completely independent from an electromagnetic circuit of a quick action mechanism of the hydraulic electromagnetic circuit breaker.

Technical Field

The invention relates to the technical field of circuit breakers, in particular to a quick action mechanism of a hydraulic electromagnetic circuit breaker and a circuit breaker with the quick action mechanism.

Background

When the traditional hydraulic electromagnetic circuit breaker is overloaded and short-circuited, the lock catch is pushed to unlock and release after the traditional hydraulic electromagnetic circuit breaker is closed by the working armature, so that the overload and short-circuit protection is realized. For example, the invention patent with publication number CN1103732A entitled "circuit breaker operating mechanism" discloses a circuit breaker operating mechanism comprising: a magnetic frame; a coil passing a load current and forming an axis. A pole piece aligned with the coil axis for concentrating the magnetic flux generated by the current in the coil, and an armature supported on the magnetic frame and movable transversely to the coil axis toward the pole piece under magnetic attraction between the armature and the pole piece. The tripping of the unhooking structure needs to meet the requirements of overload and short circuit. Meanwhile, according to actual short-circuit test data, the Joule integral value I2t of the breaker short circuit influences the short-circuit breaking capacity of the breaker, the short-circuit breaking time of the traditional hydraulic electromagnetic breaker is 8-12ms, and the breaking capacity of the breaker is difficult to improve in the action time. Modern appliances require a more responsive circuit breaker.

Disclosure of Invention

In order to solve the above problems, an object of the present invention is to provide a quick operation mechanism of a hydraulic electromagnetic circuit breaker and a circuit breaker having the same.

In order to achieve the purpose, the invention adopts the following technical scheme:

the quick action mechanism of the hydraulic electromagnetic circuit breaker comprises a movable contact rod, a magnetic yoke and a quick action armature, wherein the magnetic yoke and the quick action armature are rotationally arranged in a shell, the magnetic yoke and the quick action armature are riveted on the movable contact rod, the magnetic yoke is linked with the movable contact rod, the quick action armature is arranged at one end of the movable contact rod and can flexibly rotate relative to the movable contact rod, and the magnetic yoke and the quick action armature are connected through an elastic device; the lock catch is arranged on a rotating path of the quick-acting armature, when the short circuit occurs, the magnet yoke can be electrified to attract the quick-acting armature down, and when the quick-acting armature rotates, the lock catch is shifted to enable the lock catch and the buckle piece to be released, so that the circuit break is completed.

When the circuit breaker quick action mechanism passes normal current or overload current of a small multiple, the generated magnetic force is not enough to resist the reverse elasticity of the elastic device because the current is small, and the quick action mechanism does not act; when the circuit breaker suddenly appears the short circuit, short-circuit current passes through the movable contact pole and produces very big magnetic field, and the magnetic field forms closed circuit through quick-action armature and yoke, through the quick actuation quick-action armature of yoke to carry out the tripping to the hasp through quick-action armature. After a short circuit occurs, the quick action mechanism in the scheme can quickly unlock the open circuit within 2-5ms, and quick and reliable short circuit protection is realized. After the action, the fast action electromagnet structure and the contact rod act together to the opening position.

Preferably, the elastic device is a spring, the spring passes through a rivet for fixing the quick-acting armature and is fixed on the movable contact rod, and two spring angles respectively abut against the quick-acting armature and the magnetic yoke. The setting of spring makes quick action mechanism can be through the power value of adjustment spring, and the adjustment triggers quick action mechanism and carries out the electric current size that opens circuit.

Preferably, the quick-acting armature extends outwards to be provided with a poking arm, and when the short circuit occurs, the poking arm pokes the lock catch to enable the lock catch to be disengaged from the buckle piece, so that the circuit breaking is completed. The setting of the poking arm enables the volume of the quick-acting armature to be very small, so that the actuation reaction is further accelerated, and the space in the circuit breaker is also saved.

Preferably, the other end of the movable contact rod is further provided with a movable contact, a fixed contact is correspondingly arranged on a rotating path of the movable contact rod, the movable contact rod moves downwards when the movable contact rod is switched on, the movable contact abuts against the fixed contact, and the movable contact is separated from the fixed contact when the movable contact rod is switched off. The quick action mechanism is connected and disconnected with the control circuit through the contact between the moving contact at the other end of the moving contact rod and the fixed contact. The moving contact rod is fixed by a fixed rotating shaft in the middle, one end of the moving contact rod is provided with a quick action mechanism, and the other end of the moving contact rod is provided with a moving contact and is connected to form a lever structure. When the switch is normally switched on, the moving contact is in attractive contact with the static contact through the electrical property, the circuit is electrified, and the quick action mechanism enters a working state; when short circuit occurs, the magnetic yoke sucks down the quick-acting armature, the moving contact is separated from the static contact, and the quick-acting mechanism falls back downwards. When a short-circuit point exists in a circuit in an open circuit state, during closing, the quick-acting mechanism can quickly open a circuit at the moment of contact of the movable contact and the static contact, the circuit breaking protection is started without requiring complete closing, and the traditional circuit breaker implements protection after complete closing. The circuit breaking efficiency is greatly improved.

Preferably, the movable contact rod comprises two linked swing arms, one end of each of the two swing arms is provided with a movable contact, a fixed contact corresponding to the movable contact is arranged on a swing path of each of the two swing arms, and the magnetic yoke and the quick-acting armature are arranged on one of the swing arms.

A hydraulic electromagnetic circuit breaker comprises the quick action mechanism of any hydraulic electromagnetic circuit breaker. The hydraulic electromagnetic type circuit breaker of this scheme can only protect through foretell circuit breaker quick action mechanism.

Preferably, the electromagnetic circuit breaker is further provided with a short circuit overload release in parallel. The hydraulic electromagnetic type circuit breaker of this scheme also can set up at hydraulic electromagnetic type circuit breaker with traditional short circuit overload breaker together, protects simultaneously. When overload and short circuit with small current occur, the circuit can be broken through the traditional circuit breaking device; when the short-circuit current is large, the current can be quickly cut off through the quick action mechanism. Meanwhile, the reliability of the system is improved by the two parallel circuit breaking protection devices.

Preferably, the short circuit overload release is completely independent from the electromagnetic circuit of the quick action mechanism of the hydraulic electromagnetic circuit breaker. Conventional short-circuit protection devices and snap-action mechanisms are parallel and independent cut-off devices.

The technical scheme of the invention discloses a circuit breaker which can be provided with a traditional circuit breaking structure and a quick-action circuit breaking mechanism in parallel, improves the breaking speed of the circuit breaker when a large current is short-circuited, and can realize better protection on equipment.

Drawings

Fig. 1 is a schematic perspective sectional view of a hydraulic electromagnetic circuit breaker according to an embodiment of the present invention;

fig. 2 is a front schematic view of a fast acting mechanism in a hydraulic electromagnetic circuit breaker according to an embodiment of the present invention;

fig. 3 is a rear view of a fast acting mechanism in a hydraulic electromagnetic circuit breaker according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a magnetic field loop in the circuit breaking instant fast acting mechanism of the hydraulic electromagnetic circuit breaker according to an embodiment of the present invention;

fig. 5 is a schematic view of a working plane of the hydraulic electromagnetic circuit breaker in a normal closing state and without short-circuit current according to an embodiment of the present invention;

fig. 6 is a schematic perspective view illustrating a normal closing state of the hydraulic electromagnetic circuit breaker and a working state of the hydraulic electromagnetic circuit breaker without a short-circuit current according to an embodiment of the present invention;

fig. 7 is a schematic plan view illustrating an instantaneous trip process of the hydraulic electromagnetic circuit breaker when a short-circuit current suddenly occurs in a normal closing state of the circuit breaker according to an embodiment of the present invention;

fig. 8 is a schematic perspective view illustrating an instantaneous trip process of the hydraulic electromagnetic circuit breaker when a short-circuit current suddenly occurs in a normal closing state of the circuit breaker according to an embodiment of the present invention;

fig. 9 is a schematic plan view illustrating an instantaneous trip process of a hydraulic electromagnetic circuit breaker according to an embodiment of the present invention when a short-circuit point exists in a line during a closing process of the circuit breaker;

fig. 10 is a schematic perspective view illustrating an instantaneous trip process of the hydraulic electromagnetic circuit breaker according to an embodiment of the present invention, when a short-circuit point exists in a line during a closing process of the hydraulic electromagnetic circuit breaker.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example 1

As shown in fig. 1-10, a quick acting mechanism of a hydraulic electromagnetic circuit breaker, a movable contact rod 4, a magnetic yoke 2 and a quick acting armature 1 riveted on the movable contact rod 4 are rotatably arranged in a housing, the magnetic yoke 2 is linked with the movable contact rod 4, the quick acting armature 1 is arranged at one end of the movable contact rod 4 and can flexibly rotate relative to the movable contact rod 4, a spring 3 is fixed on the movable contact rod 4 by passing through a rivet 5 for fixing the quick acting armature 1, and two spring angles respectively abut against the quick acting armature 1 and the magnetic yoke 2. The quick-acting armature 1 extends outwards to be provided with a poking arm, the lock catch 8 is arranged on a rotating path of the poking arm of the quick-acting armature 1, during short circuit, the magnet yoke 2 can be electrified to attract the quick-acting armature 1, and the lock catch 8 is poked when the quick-acting armature 1 rotates, so that the lock catch 8 and the buckle piece are disengaged, and the circuit breaking is completed. The other end of the movable contact rod is also provided with a movable contact 7, a fixed contact 6 is correspondingly arranged on a rotating path of the movable contact rod 4, when the movable contact rod is switched on, the movable contact rod 4 moves downwards, the movable contact 7 is abutted against the fixed contact 6, and when the movable contact rod is switched off, the movable contact 7 is separated from the fixed contact 6. The quick action mechanism is connected and disconnected with a disconnection control circuit through the contact of a moving contact 7 and a fixed contact 6 at the other end of a moving contact rod 4. The moving contact rod 4 comprises two linked swing arms, moving contacts 7 are arranged at one ends of the two swing arms, fixed contacts 6 corresponding to the moving contacts are arranged on swing paths of the two swing arms, and the magnetic yoke 2 and the quick-acting armature 1 are arranged on one of the swing arms.

When the circuit breaker quick action mechanism passes normal current or overload current with smaller multiple, the generated magnetic force is not enough to resist the reverse elasticity of the spring because the current is small, the quick action mechanism does not act, and at the moment, if protection is needed, the short circuit overload release performs protection; when the breaker suddenly has a short circuit with larger current, the short circuit current passes through the movable contact rod and causes the magnetic yoke to generate a large magnetic field, the magnetic field forms a closed loop through the quick-acting armature and the magnetic yoke, the quick-acting armature is quickly attracted through the magnetic yoke, and the latch is unlocked through the quick-acting armature. After a short circuit occurs, the quick action mechanism in the scheme can quickly unlock the open circuit within 2-5ms, so that quick short circuit protection is realized. When a short-circuit point exists in a circuit in an open circuit state, during closing, the quick-acting mechanism can quickly open a circuit at the moment of contact of the movable contact and the static contact, the circuit breaking protection is started without requiring complete closing, and the traditional circuit breaker implements protection after complete closing. The circuit breaking efficiency is greatly improved. After the action, the fast action electromagnet structure and the contact rod act together to the opening position. The setting of spring makes quick action mechanism can be through the power value of adjustment spring, and the adjustment triggers quick action mechanism and carries out the electric current size that opens circuit. The setting of the poking arm enables the volume of the quick-acting armature to be very small, so that the actuation reaction is further accelerated, and the space in the circuit breaker is also saved.

The moving contact rod is fixed by a fixed rotating shaft in the middle, one end of the moving contact rod is provided with a quick action mechanism, and the other end of the moving contact rod is provided with a moving contact and is connected to form a lever structure. When the switch is normally switched on, the moving contact is in attractive contact with the static contact through the electrical property, the circuit is electrified, and the quick action mechanism enters a working state; when short circuit occurs, the magnetic yoke sucks down the quick-acting armature, the moving contact is separated from the static contact, and the quick-acting mechanism falls back downwards.

The quick action mechanism in the technical scheme can effectively improve the short-circuit speed when a large-current short circuit occurs, and the trigger current is adjustable. According to the condition that the value of the Joule integral value I2t born by the circuit breaker is not changed, the breaking time t is reduced, the reliability of the short-circuit current of the breaking circuit can be improved, and under the condition that the breaking time t is not changed, the larger short-circuit current can be broken, and the breaking capacity of the circuit breaker is improved.

Example 2

As shown in fig. 1-10, the fast acting mechanism in this solution can be used alone in a circuit breaker, and can be set in a linkage manner with a conventional short circuit overload trip device, or can be set in parallel independently from a conventional circuit breaker. The hydraulic electromagnetic circuit breaker related in this embodiment includes the above-mentioned quick action mechanism of any hydraulic electromagnetic circuit breaker, and is provided with a conventional short circuit overload release in parallel. The traditional short circuit overload release is completely independent from an electromagnetic loop of a quick action mechanism of the hydraulic electromagnetic type circuit breaker, and the traditional short circuit overload release and the quick action mechanism of the hydraulic electromagnetic type circuit breaker can protect the circuit breaker independently.

In the embodiment, when overload and short circuit with small current occur, the circuit can be disconnected through the traditional circuit breaker; when the short-circuit current is large, the current can be quickly cut off through the quick action mechanism. Meanwhile, the reliability of the system is improved by the two parallel circuit breaking protection devices.

The technical scheme of the invention discloses a circuit breaker which can be provided with a traditional circuit breaking structure and a quick-action circuit breaking mechanism in parallel, improves the breaking speed of the circuit breaker when a large current is short-circuited, and can realize better protection on equipment.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.