CN112151301B - Arc extinguish chamber and circuit breaker - Google Patents

Arc extinguish chamber and circuit breaker Download PDF

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Publication number
CN112151301B
CN112151301B CN202010543507.7A CN202010543507A CN112151301B CN 112151301 B CN112151301 B CN 112151301B CN 202010543507 A CN202010543507 A CN 202010543507A CN 112151301 B CN112151301 B CN 112151301B
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China
Prior art keywords
static
contact
movable
support
moving
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CN202010543507.7A
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Chinese (zh)
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CN112151301A (en
Inventor
江经华
张洪铁
李俊锋
魏建巍
段晓辉
卞志文
张银穗
孙清超
张超军
郭艳雪
赵建磊
王祯
姚明明
陈晔
魏登峰
井琼琼
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Fujian Electric Power Co Ltd
Pinggao Group Co Ltd
Original Assignee
State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Fujian Electric Power Co Ltd
Pinggao Group Co Ltd
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Application filed by State Grid Corp of China SGCC, Electric Power Research Institute of State Grid Fujian Electric Power Co Ltd, Pinggao Group Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN202010543507.7A priority Critical patent/CN112151301B/en
Publication of CN112151301A publication Critical patent/CN112151301A/en
Application granted granted Critical
Publication of CN112151301B publication Critical patent/CN112151301B/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/42—Driving mechanisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/72—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber

Abstract

The invention relates to an arc extinguish chamber and a circuit breaker, wherein the arc extinguish chamber comprises an opening and closing main circuit and an opening and closing resistance branch circuit which are arranged in parallel, the opening and closing main circuit comprises a main fracture, the opening and closing resistance branch circuit comprises a closing resistor, a movable side resistance contact and a static side resistance contact, the movable side resistance contact and the static side resistance contact form a resistance fracture, the resistance fracture and the main fracture are arranged in parallel in the width direction of the arc extinguish chamber, the closing resistor comprises a movable side closing resistor and a static side closing resistor which are respectively arranged at two sides of the resistance fracture, when the resistance fracture is closed preferentially, the movable side closing resistor and the static side closing resistor share the voltage in a part of the opening and closing resistance branch circuit respectively, so that the pressure difference between the position of the resistance fracture and the static contact is reduced, the insulation distance between the main fracture and the resistance fracture meeting the insulation requirements can be reduced, the compactness of the arc extinguish chamber structure is improved, the size of the arc extinguish chamber in the width direction is reduced, and the volume of the arc extinguish chamber and the whole circuit breaker is reduced.

Description

Arc extinguish chamber and circuit breaker
Technical Field
The invention relates to an arc extinguish chamber and a circuit breaker.
Background
The switching-on resistor is an important component of the ultrahigh voltage and extra-high voltage circuit breaker, can well limit switching-on overvoltage of an alternating current system, and prevents the generation of operating overvoltage which endangers the safety of a power grid when a no-load long line is switched on and off. The arc extinguish chamber of the circuit breaker in the prior art is generally cylindrical, the arc extinguish chamber comprises a switching main circuit where a main fracture is located, the main fracture is formed by a moving contact and a fixed contact which are connected in series in the switching main circuit, the arc extinguish chamber further comprises a switching resistance branch circuit which is connected in parallel on the main circuit, a switching resistance and a resistance fracture are arranged in the switching resistance branch circuit, the resistance fracture is formed by a moving side resistance contact and a static side resistance contact which are connected in series in the switching resistance branch circuit, the arc extinguish chamber further comprises a driving mechanism, and the driving mechanism is used for driving the moving contact and the moving side resistance contact so as to realize the closing and the opening of the main fracture and the resistance fracture. Closing resistor generally sets up at the side of moving or quiet side of closing a floodgate circuit branch road, the resistance fracture generally is arranged side by side with the main fracture of divide-shut brake main road in the footpath of explosion chamber, for guaranteeing the insulation between main fracture and the resistance fracture, need reserve the insulation distance between main fracture and resistance fracture, the corresponding external diameter that can increase shielding structure and explosion chamber, in order to guarantee the insulating reliability of circuit breaker, the insulation distance between explosion chamber and the circuit breaker casing is unchangeable, therefore the size of circuit breaker casing also can be great, the quantity of sulfur hexafluoride in the circuit breaker casing also can increase.
Disclosure of Invention
The invention aims to provide an arc extinguish chamber, which aims to solve the technical problem that the arc extinguish chamber with a closing resistor branch circuit in the prior art has larger volume; correspondingly, the invention also aims to provide a circuit breaker to solve the technical problems that the circuit breaker with the closing resistor branch in the prior art is large in size and the consumption of sulfur hexafluoride in the circuit breaker is large.
The arc extinguish chamber adopts the following technical scheme:
the explosion chamber includes:
the opening and closing main circuit comprises a moving contact and a static contact, and the moving contact and the static contact form a main fracture;
the opening and closing resistance branch circuit is arranged in parallel with the opening and closing main circuit and comprises a closing resistance, a moving side resistance contact and a static side resistance contact, and the moving side resistance contact and the static side resistance contact form a resistance fracture;
the transmission mechanism is in transmission connection with the operating mechanism to drive the moving contact and the moving side resistance contact so as to realize the closing and the opening of the main fracture and the resistance fracture;
the switching-on resistor comprises a moving side switching-on resistor and a static side switching-on resistor, the moving side switching-on resistor is connected between the moving contact and the moving side resistor contact in a conductive manner, and the static side switching-on resistor is connected between the static contact and the static side resistor contact in a conductive manner.
The invention has the beneficial effects that: according to the arc extinguish chamber, the switching-on resistor comprises a movable side switching-on resistor and a static side switching-on resistor, the movable side switching-on resistor and the static side switching-on resistor are respectively arranged on two sides of the resistor fracture, when the main fracture is closed preferentially at the resistor fracture, the movable side switching-on resistor and the static side switching-on resistor share part of voltage in a switching-on resistor branch, so that the voltage difference between the position of the resistor fracture and a charged static contact is reduced, the insulation distance between the main fracture and the resistor fracture meeting the insulation requirement can be reduced, the compactness of the arc extinguish chamber structure is improved, the size of the arc extinguish chamber in the width direction is reduced, and the volume of the arc extinguish chamber is reduced.
Furthermore, the arc extinguish chamber further comprises a movable support and a static support, the static support and the movable support are used for being fixed in a breaker shell, the movable contact is arranged on the movable support in a conductive mode, the static contact is arranged on the static support in a conductive mode, the static side resistance contact is arranged on the static support in a penetrating mode, the dynamic side resistance contact is arranged on the dynamic side resistance contact, and the dynamic side resistance contact is fixedly connected with the movable support in an insulating mode so that the main fracture and the resistance fracture are located between the static support and the movable support.
The beneficial effects are as follows: in the above arrangement of the structure of the moving-side resistor contact, the moving-side resistor contact is arranged in the moving support in a penetrating manner, the static-side resistor contact is arranged in the static support in a penetrating manner, the moving contact is arranged on the moving support in a conductive manner, and the static contact is arranged on the static support in a conductive manner, so that the main fracture and the resistor fracture are both positioned between the static support and the moving support, the main fracture and the resistor fracture are not limited by the sizes of the static support and the moving support, the requirement of using the minimum distance between the main fracture and the resistor port under the condition of the requirement of the insulation distance is met, and the structure compactness of the arc extinguish chamber is improved.
Furthermore, the moving side closing resistor and the static side closing resistor are arranged in an extending manner in the moving direction of the moving contact;
the movable side closing resistors are arranged in groups, the movable side closing resistors which are arranged in groups are arranged in parallel in the direction perpendicular to the moving direction of the movable contact, the movable side closing resistors which are arranged in groups are connected in series, the movable contact conductive connecting end which is connected with the movable contact in a conductive mode on the movable side closing resistors which are connected in series is fixedly connected with the movable support in a conductive mode, and the movable side resistance contact conductive connecting end which is connected with the movable side resistance contact in a conductive mode on the movable side closing resistors which are connected in series is fixedly connected with the movable side resistance contact seat in a conductive mode; and/or quiet side closing resistance is provided with at least two sets ofly, and the quiet side closing resistance who arranges in groups arranges in parallel in the direction that the perpendicular to moving contact removed, and the quiet side closing resistance who arranges in groups establishes ties, and the static contact conductive connection end and the electrically conductive fixed connection of quiet support of electrically conductive connection with the static contact on the quiet side closing resistance who establishes ties, and the quiet side resistance contact conductive connection end and the electrically conductive fixed connection of quiet side resistance contact seat of electrically conductive connection with quiet side resistance contact on the quiet side closing resistance who establishes ties.
The beneficial effects are as follows: the size of the movable side closing resistor and/or the size of the static side closing resistor in the moving direction of the movable contact can be reduced by the aid of the structure, and the size of the arc extinguish chamber in the moving direction of the movable contact is reduced.
Furthermore, the conductive connecting end of the movable side resistor contact and the conductive connecting end of the movable contact are both one ends of the movable side closing resistor close to the movable support.
The beneficial effects are as follows: the structure can enable the moving side resistance contact conductive connecting end and the moving contact conductive connecting end to be close to the moving support, so that the moving side closing resistance is fixedly connected with the moving support and the moving side resistance contact base respectively.
Furthermore, in the moving direction of the moving contact, the moving side closing resistor is arranged on one side of the moving support, which faces away from the main fracture, one end of the moving side closing resistor, which is close to the moving support, is fixed on the moving support, and the end, which is far away from the moving support, is fixed on the transmission mechanism through the moving side insulating part.
The beneficial effects are as follows: in the structural arrangement, one end of the moving side closing resistor in the two ends of the moving direction of the moving contact is fixed on the moving support, and the other end of the moving side closing resistor is fixed on the transmission mechanism, so that the structural stability of the moving side closing resistor in the arc extinguish chamber is improved.
Furthermore, the moving side resistance contact is provided with a moving side resistance contact rod, the moving side resistance contact rod extends along the moving direction of the moving contact, and two groups of moving side closing resistors which are arranged in groups are arranged at intervals in the moving direction perpendicular to the moving direction of the moving contact to form a moving space for the moving side resistance contact rod to reciprocate in the moving direction of the moving contact.
The beneficial effects are as follows: in the structural arrangement, the movable side resistor contact rod is movably arranged between the two groups of movable side closing resistors, so that the compactness of the arc extinguish chamber structure is improved, and the volume of the arc extinguish chamber can be reduced.
Furthermore, the static side resistance contact conductive connecting end and the static contact conductive connecting end are both one ends close to the static support on the static side closing resistor.
The beneficial effects are as follows: the structure can enable the static side resistance contact conductive connecting end and the static contact conductive connecting end to be close to the static support, so that the static side closing resistance is fixedly connected with the static support and the static side resistance contact base respectively.
Furthermore, in the moving direction of the moving contact, the static side closing resistor is arranged on one side, back to the main fracture, of the static support, one end, close to the static support, of the static side closing resistor is fixed on the static support, and the end, far away from the static support, of the static side closing resistor is fixed on the static side resistor contact base through the static side insulating part.
The beneficial effects are as follows: in the structure, one end of the static side closing resistor in the two ends of the moving direction of the moving contact is fixed on the static support, and the other end of the static side closing resistor is fixed on the static side resistor contact seat, so that the structural stability of the static side closing resistor in the arc extinguish chamber is improved.
Further, the movable side resistor contact seat is fixed on the movable support through a movable side insulator, the static side resistor contact seat is fixed on the static support through a static side insulator, and at least one of the movable side insulator and the static side insulator is fixed between the movable support and the static support.
The beneficial effects are as follows: because the main fracture needs great installation space in the moving direction of the moving contact, the structure can make full use of the space between the moving support and the static support, thereby being beneficial to increasing the compactness of the arc extinguish chamber structure and reducing the size of the arc extinguish chamber in the moving direction of the moving contact.
The circuit breaker adopts the following technical scheme: the circuit breaker, including the circuit breaker casing, be equipped with operating mechanism and explosion chamber in the circuit breaker casing, operating mechanism is connected with the explosion chamber transmission, and the explosion chamber includes:
the switching-on and switching-off main circuit comprises a moving contact and a static contact, and the moving contact and the static contact form a main fracture;
the opening and closing resistance branch circuit is arranged in parallel with the opening and closing main circuit and comprises a closing resistance, a movable side resistance contact and a static side resistance contact, and the movable side resistance contact and the static side resistance contact form a resistance fracture;
the transmission mechanism is in transmission connection with the operating mechanism to drive the moving contact and the moving side resistance contact so as to realize the closing and the opening of the main fracture and the resistance fracture;
the closing resistor comprises a moving side closing resistor and a static side closing resistor, the moving side closing resistor is in conductive connection between the moving contact and the moving side resistor contact, and the static side closing resistor is in conductive connection between the static contact and the static side resistor contact.
The beneficial effects of the invention are: according to the arc extinguish chamber of the circuit breaker, the switching-on resistor comprises the moving side switching-on resistor and the static side switching-on resistor, the moving side switching-on resistor and the static side switching-on resistor are respectively arranged on two sides of the resistor fracture, when the main fracture is closed preferentially at the resistor fracture, the moving side switching-on resistor and the static side switching-on resistor share part of voltage in a switching-on resistor branch, so that the voltage difference between the position of the resistor fracture and a charged static contact is reduced, the insulation distance between the main fracture and the resistor fracture meeting the insulation requirement can be reduced, the compactness of the arc extinguish chamber and the circuit breaker in the width direction is improved, the size of the arc extinguish chamber and the circuit breaker in the width direction is reduced, and the size of the arc extinguish chamber and the circuit breaker is reduced.
Furthermore, the arc extinguish chamber further comprises a movable support and a static support, the static support and the movable support are used for being fixed in a breaker shell, the movable contact is arranged on the movable support in a conductive mode, the static contact is arranged on the static support in a conductive mode, the static side resistance contact is arranged on the static support in a penetrating mode, the static side resistance contact is arranged on the static side resistance contact in a penetrating mode, the static side resistance contact is arranged on the static support in a penetrating mode, the movable side resistance contact is arranged on the movable support in an insulating mode, and the movable side resistance contact is fixedly connected with the movable support in an insulating mode, so that the main fracture and the resistance fracture are located between the static support and the movable support.
The beneficial effects are as follows: in the above arrangement of the structure of the moving-side resistor contact, the moving-side resistor contact is arranged in the moving support in a penetrating manner, the static-side resistor contact is arranged in the static support in a penetrating manner, the moving contact is arranged on the moving support in a conductive manner, and the static contact is arranged on the static support in a conductive manner, so that the main fracture and the resistor fracture are both positioned between the static support and the moving support, the main fracture and the resistor fracture are not limited by the sizes of the static support and the moving support, the requirement of using the minimum distance between the main fracture and the resistor port under the condition of the requirement of the insulation distance is met, and the improvement of the structural compactness of the arc extinguish chamber and the circuit breaker is facilitated.
Furthermore, the moving side closing resistor and the static side closing resistor are arranged in an extending manner in the moving direction of the moving contact;
the movable side switching-on resistors are arranged in at least two groups, the movable side switching-on resistors which are arranged in groups are arranged in parallel in the direction perpendicular to the moving direction of the movable contact, the movable side switching-on resistors which are arranged in groups are connected in series, the movable contact conductive connecting end which is connected with the movable contact in a conductive manner on the movable side switching-on resistors which are connected in series is fixedly connected with the movable support in a conductive manner, and the movable side resistor contact conductive connecting end which is connected with the movable side resistor contact in a conductive manner on the movable side switching-on resistors which are connected in series is fixedly connected with the movable side resistor contact in a conductive manner; and/or quiet side closing resistance is provided with at least two sets ofly, and the quiet side closing resistance who arranges in groups arranges in parallel in the direction that the perpendicular to moving contact removed, and the quiet side closing resistance who arranges in groups establishes ties, and the static contact conductive connection end and the electrically conductive fixed connection of quiet support of electrically conductive connection with the static contact on the quiet side closing resistance who establishes ties, and the quiet side resistance contact conductive connection end and the electrically conductive fixed connection of quiet side resistance contact seat of electrically conductive connection with quiet side resistance contact on the quiet side closing resistance who establishes ties.
The beneficial effects are as follows: the size of the movable side closing resistor and/or the size of the static side closing resistor in the moving direction of the movable contact can be reduced by the aid of the structure, and the size of the arc extinguish chamber and the size of the breaker in the moving direction of the movable contact are reduced.
Furthermore, the movable side resistance contact conductive connecting end and the movable contact conductive connecting end are both one ends, close to the movable support, of the movable side closing resistor.
The beneficial effects are as follows: the structure can enable the moving side resistance contact conductive connecting end and the moving contact conductive connecting end to be close to the moving support, so that the moving side closing resistance is fixedly connected with the moving support and the moving side resistance contact base respectively.
Furthermore, in the moving direction of the moving contact, the moving side closing resistor is arranged on one side of the moving support, which faces away from the main fracture, one end of the moving side closing resistor, which is close to the moving support, is fixed on the moving support, and the end, which is far away from the moving support, is fixed on the transmission mechanism through the moving side insulating part.
The beneficial effects are as follows: in the structural arrangement, one end of the moving side closing resistor in the two ends of the moving direction of the moving contact is fixed on the moving support, and the other end of the moving side closing resistor is fixed on the transmission mechanism, so that the structural stability of the moving side closing resistor in the arc extinguish chamber is improved.
Furthermore, the moving side resistance contact is provided with a moving side resistance contact rod, the moving side resistance contact rod extends along the moving direction of the moving contact, and two groups of moving side closing resistors which are arranged in groups are arranged at intervals in the moving direction perpendicular to the moving direction of the moving contact to form a moving space for the moving side resistance contact rod to reciprocate in the moving direction of the moving contact.
The beneficial effects are as follows: among the above-mentioned structural setting, move the activity of side resistance contact pole and set up between two sets of side closing resistance that move, help improving the compactedness of explosion chamber and whole circuit breaker structure, can reduce the volume of explosion chamber and circuit breaker.
Furthermore, the static side resistance contact conductive connecting end and the static contact conductive connecting end are both one ends close to the static support on the static side closing resistor.
The beneficial effects are as follows: the structure can enable the static side resistance contact conductive connecting end and the static contact conductive connecting end to be close to the static support, so that the static side closing resistance is fixedly connected with the static support and the static side resistance contact base respectively.
Furthermore, in the moving direction of the moving contact, the static side closing resistor is arranged on one side, back to the main fracture, of the static support, one end, close to the static support, of the static side closing resistor is fixed on the static support, and the end, far away from the static support, of the static side closing resistor is fixed on the static side resistor contact seat through the static side insulating part.
The beneficial effects are as follows: in the structure, one end of the static side closing resistor in the two ends of the moving direction of the moving contact is fixed on the static support, and the other end of the static side closing resistor is fixed on the static side resistor contact base, so that the structural stability of the static side closing resistor in the arc extinguish chamber is improved.
Further, the movable side resistor contact seat is fixed on the movable support through a movable side insulator, the static side resistor contact seat is fixed on the static support through a static side insulator, and at least one of the movable side insulator and the static side insulator is fixed between the movable support and the static support.
The beneficial effects are as follows: because the main fracture needs great installation space on the moving direction of the moving contact, the structure can make full use of the space between the moving support and the static support, thereby being beneficial to increasing the compactness of the structures of the arc extinguish chamber and the circuit breaker and reducing the sizes of the arc extinguish chamber and the circuit breaker in the moving direction of the moving contact.
Drawings
Fig. 1 is a simplified schematic diagram of a circuit breaker according to an embodiment 1 of the circuit breaker of the present invention;
fig. 2 is a simplified structural schematic diagram of an arc chute in embodiment 1 of the circuit breaker of the present invention;
fig. 3 is a schematic structural view of an arc chute in embodiment 1 of the circuit breaker of the present invention;
FIG. 4 is a schematic view of the structure at A in FIG. 2;
fig. 5 is a partial structural schematic view of an arc extinguishing chamber in embodiment 1 of the circuit breaker of the present invention;
fig. 6 is a schematic structural diagram of a moving-side resistance contact, a moving-side resistance contact seat, and a moving-side insulating rod in embodiment 1 of the circuit breaker of the present invention;
fig. 7 is a schematic structural diagram of a moving-side resistor contact seat in embodiment 1 of the circuit breaker of the present invention;
fig. 8 is a schematic structural view of a stationary-side resistive contact, a stationary-side resistive contact holder, a stationary-side insulating rod, and an end cap in embodiment 1 of the circuit breaker of the present invention;
fig. 9 is a schematic structural diagram of a dead-side resistive contact base in embodiment 1 of the circuit breaker of the present invention;
in the figure: 1-a circuit breaker shell, 2-an operating mechanism, 3-an arc extinguish chamber, 4-a moving contact, 5-a moving side resistance contact, 6-a static side resistance contact, 7-a resistance fracture, 8-a main fracture, 9-a moving side closing resistance, 10-a static side closing resistance, 11-a moving contact rod, 12-a moving side resistance contact rod, 13-a transmission box, 14-an insulating support cylinder, 15-a transmission connecting plate, 16-a connecting rod, 17-a transmission rod, 18-a moving support, 19-a guide shaft, 21-a static support, 22-a static side resistance contact rod, 23-an insulating rod, 25-an outlet end, 26-a high-voltage inlet end, 27-a moving side resistance contact seat, 28-a static side resistance contact seat, 29-an end cover, 30-a spring, 31-a moving side connecting boss, 32-a moving side insulating rod, 33-a static side connecting boss, 34-a static side insulating rod, 35-a moving side conductive plate, 36-a moving side conductive boss, 37-a moving side insulating piece, 38-a static side conductive piece, 39-a static side conductive piece and 40-a static side insulating piece.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
Embodiment 1 of the circuit breaker of the present invention:
as shown in fig. 1 to 3, the circuit breaker includes a circuit breaker housing 1, an operating mechanism 2 and an arc-extinguishing chamber 3 are provided in the circuit breaker housing 1, the arc-extinguishing chamber 3 is integrally formed in an elongated structure, the arc-extinguishing chamber 3 includes a main opening and closing circuit and a branch circuit of the opening and closing circuit extending in a longitudinal direction thereof, the main opening and closing circuit and the branch circuit of the opening and closing circuit are arranged in parallel, a moving contact 4 and a stationary contact are provided on the main opening and closing circuit, a main opening 8 is formed between the moving contact 4 and the stationary contact, the moving contact 4 is movable in a reciprocating manner in the longitudinal direction of the arc-extinguishing chamber, a moving side resistive contact 5 and a stationary side resistive contact 6 are provided on the branch circuit of the opening and closing circuit, the stationary contact includes a moving side closing resistor 9 and a stationary side closing resistor 10, a movable side closing resistor 9 is provided on the branch circuit, the moving side closing resistor 9 is connected between the moving side closing resistor 4 and the moving side closing resistor 5, the stationary side closing resistor 10 is connected between the closing resistor 9 and the switching circuit-extinguishing chamber 6, and the switching resistor 10 are connected in parallel, and the same direction, and the switching resistor 9 is provided on the same side of the same side opening, when a voltage difference between the moving side opening and the main opening 7 is reduced, and the same side switching circuit breaker, and the same is required voltage of the same, and the same terminal, and the same, the size of the arc extinguish chamber 3 in the width direction is reduced, the volume of the arc extinguish chamber 3 and the whole circuit breaker is reduced, and further the using amount of sulfur hexafluoride used in the circuit breaker shell 1 can be reduced.
In this embodiment, as shown in fig. 1 to 4, the moving contact 4 is connected to a moving contact rod 11, the arc extinguish chamber 3 includes a transmission mechanism connected to the moving contact rod 11, the moving-side resistive contact 5 is connected to a moving-side resistive contact rod 12, the transmission mechanism is connected to the moving-side resistive contact rod 12, and the transmission mechanism is connected to an output shaft of the operating mechanism 2, so as to drive the moving-side resistive contact 5 and the moving contact 4 to reciprocate along the length direction of the arc extinguish chamber 3 through the operating mechanism 2 and the transmission mechanism, thereby realizing opening and closing of the main fracture 8 and the resistive fracture 7. Specifically, the transmission mechanism comprises a transmission case 13, the transmission case 13 is fixedly connected with the circuit breaker shell 1 through an insulating support cylinder 14, the transmission mechanism further comprises a transmission connecting plate 15, the transmission connecting plate 15 is located in the transmission case 13, a connecting rod 16 is hinged to the transmission connecting plate 15, the connecting rod 16 penetrates out of the transmission case 13 and is in transmission connection with an output shaft of the operating mechanism 2, the transmission connecting plate 15 is further in transmission connection with the moving contact 4 and the moving side resistance contact 5 respectively, the transmission connecting plate 15 is directly hinged to the end portion of the moving contact rod 11, and two hinged shafts hinged to the connecting rod 16 and the end portion of the moving contact rod on the transmission connecting plate 15 are arranged at intervals in the length direction of the arc extinguish chamber 3. The transmission mechanism further comprises a transmission rod 17 connected between the transmission connecting plate 15 and the moving-side resistance contact rod 12, one end of the transmission rod 17 is hinged to the transmission connecting plate 15, a hinged shaft of the transmission rod 17 is arranged beside a straight line where two hinged shafts hinged to the connecting rod 16 and the end portion of the moving contact rod 15 are respectively located, and the other end of the transmission rod 17 is hinged to the end portion of the moving-side resistance contact rod 12.
In this embodiment, as shown in fig. 1 to fig. 3, a movable support 18 is connected to a side of the transmission case 13 away from the insulating support cylinder, the movable contact rod 11 and the movable side resistance contact rod 12 both penetrate through the movable support 18, a guide shaft 19 is further disposed in the transmission case 13, the guide shaft 19 extends along the length direction of the arc extinguish chamber 3, one end of the guide shaft 19 is fixed on a case wall of the transmission case 13, the other end of the guide shaft is fixed on the movable support 18, and a transmission link plate 15 is installed in the guide shaft 19 in a guiding manner to move the transmission link plate 15 along the length direction of the arc extinguish chamber 3 when the operating mechanism 2 operates, so as to drive the movable contact 4 and the movable side resistance contact 5 to operate simultaneously, thereby ensuring the synchronization of the operations of the movable contact 4 and the movable side resistance contact 5.
In this embodiment, as shown in fig. 2, 3, and 5, the movable support 18 is provided with a movable contact rod through hole and a movable side resistance contact rod through hole, the movable support 18 is provided with a static support 21 on a side facing away from the transmission case, the static side resistance contact 6 is connected with a static side resistance contact rod 22, the static support 21 is used to fix the static side resistance contact rod 22, the movable side resistance contact 5 and the static side resistance contact 6 are both located between the movable support 18 and the static support 21, the main fracture 8 and the resistance fracture 7 are both located between the movable support 18 and the static support 21, and in the width direction of the arc extinguish chamber, the main fracture 8 and the resistance fracture are arranged in parallel, so as to reduce the distance between the resistance fracture 8 and the resistance port in the width direction of the arc extinguish chamber 3, which is beneficial to reducing the size of the arc extinguish chamber 3 and the circuit breaker in the width direction.
The moving contact is electrically conducted and configured on the moving support, the static contact is electrically conducted and configured on the static support, the static side resistance contact is configured with a static side resistance contact seat, the static side resistance contact seat is arranged in the static support in a penetrating mode and is fixedly connected with the static support in an insulating mode, the moving side resistance contact is configured with a moving side resistance contact seat, and the moving side resistance contact seat is arranged in the moving support in a penetrating mode and is fixedly connected with the moving support in an insulating mode, so that the main fracture and the resistance fracture are located between the static support and the moving support.
As shown in fig. 2, 3 and 5, the external profiles of the movable support 18 and the static support 21 are both cylindrical, the movable support 18 is provided with an insulating rod 23 for supporting the static support 21, the insulating rod 23 is arranged at intervals along the circumferential direction of the movable support 18, the movable support 18 is provided with a movable support slot with a notch facing the static support 21, the static support 21 is provided with a static support slot with a notch facing the movable support 18, two ends of the insulating rod 23 are respectively connected to the bottom of the movable support slot and the bottom of the static support slot, the above structure is configured to shield the main fracture 8 and the resistance fracture 7 by the side wall of the slotted slot on the movable support 18 and the side wall of the slotted slot on the static support 21, which is helpful for improving the insulation reliability of the arc extinguish chamber 3 and the whole circuit breaker.
In this embodiment, as shown in fig. 1 to 3, the movable contact 4 is fixed on the movable support 18 through the movable contact base, the movable contact base is electrically and fixedly connected with the movable support 18, the movable support 18 is provided with a wire outlet 25, the movable contact base is electrically and slidably connected with the movable contact rod 11 through the contact finger, the fixed contact is fixed on the fixed support 21 through the fixed contact base, the fixed contact base is electrically and fixedly connected with the fixed contact through the contact finger, the fixed support 21 is provided with a high-voltage wire inlet 26, and the movable contact rod 11 reciprocates in the movable contact base under the action of the operating mechanism 2 and the transmission mechanism to realize the switching operation of the breaker.
In the present embodiment, as shown in fig. 2, 3 and 5, the movable side resistance contact rod 12 is provided with a movable side resistance contact seat 27, the movable side resistance contact seat 27 is a cylindrical structure, the movable side resistance contact rod 12 is slidably inserted into the movable side resistance contact seat 27, the movable side resistance contact seat 27 is inserted into the movable side resistance contact rod through hole, and the movable side resistance contact seat 27 is electrically connected to the movable side resistance contact rod 12 through a contact finger. The static side resistance contact rod 22 is provided with a static side resistance contact seat 28, the static support 21 is provided with a static side resistance contact rod through hole, the static side resistance contact seat 28 is arranged in the static side resistance contact rod through hole in a penetrating manner, the static side resistance contact seat 28 is of a cylindrical structure, an end cover 29 is arranged at the end part, far away from the moving side resistance contact 5, of the static side resistance contact seat 28 in the length direction of the arc extinguish chamber, a spring 30 is arranged in the static side resistance contact seat 28, the static side resistance contact rod 22 is inserted in the static side resistance contact seat 28 in a guiding manner and is in conductive connection with the static side resistance contact seat 28 through contact fingers, under the driving action of the operating mechanism 2 and the transmission mechanism, the moving side resistance contact rod 12 can move in a guiding manner in the moving side resistance contact seat 27 to realize the opening and closing of the resistance fracture 7 in the opening and closing resistance branch, and the setting of the spring 30 in the static side resistance contact seat 28 can enable the resistance fracture 7 in the opening and closing resistance branch to be preferentially opened and closed and preferentially to the main fracture 8, and can effectively avoid the occurrence of overvoltage operation phenomenon in the electric power system.
In the present embodiment, as shown in fig. 5 to 9, the end of the moving-side resistance contact seat 27 facing the stationary-side resistance contact 6 is provided with two moving-side connection bosses 31, the moving-side connection bosses 31 are arranged in the radial direction of the moving-side resistance contact seat 27, each moving-side connection boss 31 is connected to the moving support 18 through a moving-side insulator, the moving-side insulator is a moving-side insulation rod 32 to ensure insulation between the moving-side resistance contact seat 27 and the moving support 18, the moving-side insulation rod 32 is arranged in the horizontal direction, and the moving-side insulation rod 32 is connected to the groove bottom of the slot of the moving support 18, so that the moving-side insulation rod 32 is located between the moving support 18 and the stationary support 21, since the main fracture requires a large installation space in the arc extinguish chamber length direction, the above-mentioned structure can fully utilize the space between the moving support 18 and the stationary support 21, can reduce the movement stroke of the moving-side resistance contact 5, contribute to increase the compactness of the arc extinguish chamber 3 and the circuit breaker, and can reduce the size of the arc extinguish chamber 3 and the circuit breaker in the length direction. The end of the static side resistance contact seat 28, which faces away from the dynamic side resistance contact 5, is provided with two static side connection bosses 33, the included angle between the two static side connection bosses 33 in the circumferential direction of the static side resistance contact seat 28 is less than 180 degrees, each static side connection boss 33 is connected with the static support 21 through a static side insulator, the static side insulator is a static side insulation rod 34, as shown in fig. 1, the static side insulation rod 34 is connected with the dynamic support seat side, which faces away from the static support seat 21, so as to reserve a stroke space for the reciprocating motion of the dynamic side resistance contact 5 between the dynamic support seat 18 and the static support seat 21, the two static side connection bosses 33 are arranged under the bias, and the two static side insulation rods 34 are also arranged in a downward inclined manner.
In this embodiment, as shown in fig. 2 and fig. 3, two sets of moving-side closing resistors 9 are provided, the two sets of moving-side closing resistors 9 are located on the side of the moving support 18 facing away from the static support and are respectively arranged to extend in the length direction of the arc extinguish chamber 3, and the moving-side closing resistors 9 arranged in groups are arranged in parallel at intervals in the width direction of the arc extinguish chamber 3, so as to form a moving space between the two moving-side closing resistors 9, in which the moving-side resistor contact rod 12 reciprocates in the length direction of the arc extinguish chamber. Two ends of two groups of movable side closing resistors 9 far away from the movable support 18 are connected through a movable side conductive plate 35 so as to form a U-shaped structure for the movable side closing resistors, one end of the two movable side closing resistors 9 is a movable contact conductive connecting end used for being in conductive connection with the movable contact 4, the other end of the two movable side closing resistors 9 is a movable side resistive contact conductive connecting end used for being in conductive connection with the movable side resistive contact, the movable contact conductive connecting end is in conductive fixed connection with the end, opposite to the static support 21, of the movable support 18 through a conductive piece and a bolt, and the movable side resistive contact conductive connecting end is in conductive fixed connection with the movable side resistive contact seat 27 through a conductive piece and a bolt. Specifically, a movable side conductive boss 36 is arranged on the outer side wall of the other end of the movable side resistance contact seat 27, and a movable side resistance contact conductive connecting end is fixed on the movable side conductive boss 36 through a conductive plate and a bolt, so that the movable side closing resistance 9 is conductively connected with the movable side resistance contact seat 27 and the movable support 18.
In the present embodiment, as shown in fig. 1, 2 and 3, the moving-side closing resistor 9 is arranged in parallel with the transmission case 13 in the width direction of the arc extinguish chamber, and in the orientation shown in fig. 2, the moving-side closing resistor 9 is located at the lower side of the transmission case 13, so as to reduce the installation space of the arc extinguish chamber 3 occupied by the moving-side closing resistor 9 in the length direction of the arc extinguish chamber 3, which is helpful for reducing the size of the arc extinguish chamber 3 and the size of the circuit breaker in the radial direction of the arc extinguish chamber 3. The movable side conducting plate 35 is connected with a movable side insulating part 37, the movable side insulating part 37 is fixed on the transmission box 13 through bolts, the movable side closing resistor 9 is hung on the outer side wall of the transmission box 13 through the movable side insulating part 37, and the structural stability of the movable side closing resistor 9, the arc extinguish chamber 3 and the circuit breaker is improved.
In this embodiment, as shown in fig. 3, two sets of static-side closing resistors 10 are provided, the two sets of static-side closing resistors 10 are located on the side of the static support 21 opposite to the movable support and respectively extend in the length direction of the arc-extinguishing chamber 3, and the static-side closing resistors 10 arranged in groups are arranged in parallel at intervals in the width direction of the arc-extinguishing chamber 3. The two ends of the two groups of static side closing resistors 10 far away from the static support 21 are connected through the static side current conducting plate 38, so that the static side closing resistors form a U-shaped structure, one end of the two groups of static side closing resistors 10 is a static contact current conducting connecting end used for being in conductive connection with a static contact, the other end of the two groups of static side closing resistors 10 is a static side resistance contact current conducting connecting end used for being in conductive connection with the static side resistance contact, the static contact current conducting connecting end is in conductive fixed connection with the end, back to the movable support 18, of the static support 21 through a conductive piece and a bolt, and the static side resistance contact current conducting connecting end is in conductive fixed connection with the static side resistance contact seat 28 through the current conducting plate and the bolt. Specifically, a static conductive boss 39 is provided on the outer side wall of the static resistive contact seat 28, and the static conductive connection end of the static resistive contact is fixed on the static conductive boss 39 through a conductive plate and a bolt, so as to realize the conductive connection between the static closing resistor 10 and the static resistive contact seat 28 and the static support 21.
In the present embodiment, as shown in fig. 2, 3 and 5, the static side resistance contact seat 28 is arranged to protrude from the movable support in the length direction of the arc extinguish chamber 3, so that the end cap 29 of the static side resistance contact seat 28 overhangs the static support 21, in the orientation shown in fig. 2, the static side closing resistor 10 is located on the upper side of the static side resistance contact seat 28, the static side conductive plate 38 at the end of the static side closing resistor 10 is connected to the end cap 29 through the static side insulating member 40, the static side insulating member 40 is a cylindrical insulating tube, the static side insulating member 40 is arranged in parallel to the static side closing resistor 10, the connection inserts are mounted at both ends of the static side insulating member 40, the connection insert of the static side insulating member 40 facing the end of the end cap 29 is a stud, the static side insulating member 40 is fixed to the end cap 20 through the stud, accordingly, the connection insert of the static side insulating member 40 facing away from the end cap 29 is a conductive insert, the conductive insert is provided with a threaded hole, the conductive insert is fixedly connected to the static side conductive plate 38 through a bolt, so that the static side insulating member 40 is connected to the static side insulating insert 38, and the static side closing resistor support the arc extinguish chamber 3, and the static side closing circuit breaker 10, and increase the stability of the static side closing structure.
In this embodiment, as shown in fig. 1 and 3, since the two stationary-side connecting bosses 33 are disposed downward and the two stationary-side insulating rods 34 are also disposed downward obliquely, the distance between the stationary-side insulating rod 34 and the bolt provided at the end of the stationary closing resistor 10 can be increased, and insulation between the stationary closing resistor 10 and the stationary insulating plate 34 can be ensured.
Embodiment 2 of the circuit breaker of the present invention:
it differs from the specific example 1 in that: the movable support is only provided with a through hole for penetrating the movable contact rod, so that the main fracture is positioned between the movable support and the static support, and the side wall of the groove formed in the movable support and the side wall of the groove formed in the static support have a shielding effect on the main fracture.
Move the side resistance and touch the seat through setting up move the side insulation connecting piece and move the insulating fixed connection of support in the radial outside of support, quiet side resistance touches the seat through setting up the quiet side insulation connecting piece and the insulating fixed connection of quiet support in the radial outside of quiet support, and the resistance fracture setting is moving the radial outside of support, and corresponds the setting and moving between support and the quiet support, but moves grooved slot side wall on grooved slot side wall and the quiet support on the support and do not have the shielding effect to the resistance fracture.
The structural arrangement in the embodiment can reduce the radial dimension of the movable support and the static support, so as to reduce the distance between the resistance fracture and the main fracture and reduce the dimension of the arc extinguish chamber and the circuit breaker in the radial direction of the arc extinguish chamber.
Embodiment 3 of the circuit breaker of the present invention:
it differs from the specific example 1 in that: the movable side switching-on resistor and the static side switching-on resistor are both provided with a group and are arranged along the length direction of the arc extinguish chamber in an extending mode, the end part of the movable side switching-on resistor, which is far away from the movable support, is a movable side resistor contact conductive connecting end, the movable side resistor contact conductive connecting end is fixed on the movable side resistor contact seat through a movable side conductive part, the end part of the movable side switching-on resistor, which is close to the movable support, is a movable contact conductive connecting end, and the movable contact conductive connecting end is fixed on the end face, which is back to the static support, of the movable support through a bolt. The end part of the movable side closing resistor, which is far away from the movable support, is hoisted on the outer side wall of the transmission case through the movable side insulating part, so that the structural stability of the movable side closing resistor, the arc extinguish chamber and the circuit breaker is improved.
The end part of the static side closing resistor, which is far away from the static contact, is a static side resistor contact conductive connecting end, the static side resistor contact conductive connecting end is fixed on the static side resistor contact seat through a static side conductive piece, the end part of the static side closing resistor, which is close to the static support, is a static contact conductive connecting end, and the static contact conductive connecting end is fixed on the end surface of the static support, which faces away from the dynamic support, through a bolt. The end part of the static side closing resistor, which is far away from the static support, is supported on the end cover of the static side resistor contact seat through the static side insulating part, so that the structural stability of the static side closing resistor, the arc extinguish chamber and the circuit breaker is improved.
In this embodiment, the closing resistor structure arranged in the above structure may also reduce a voltage difference between the resistor fracture and the static contact when the resistor fracture is closed, and reduce a distance between the resistor fracture and the main fracture, which meets an insulation requirement, thereby facilitating reduction of sizes of the arc extinguish chamber and the circuit breaker in a length direction of the arc extinguish chamber, reducing volumes of the arc extinguish chamber and the circuit breaker, and reducing usage amount of sulfur hexafluoride gas in the arc extinguish chamber.
In other embodiments, the group number of the moving-side closing resistors and the group number of the static-side closing resistors can be three groups or four groups, the closing resistors on the corresponding sides are all connected in series, the two ends of the moving-side closing resistors which are connected in series and arranged in groups are respectively connected to the moving support and the moving-side resistor contact base, the two ends of the static-side closing resistors which are connected in series and arranged in groups are respectively connected to the static support and the static-side resistor contact base, so that the installation space occupied by the closing resistors in the arc extinguish chamber in the length direction of the arc extinguish chamber is reduced, and the size of the arc extinguish chamber and the size of the circuit breaker in the length direction of the arc extinguish chamber are reduced.
In other embodiments, the number of sets of the dynamic side closing resistors is different from the number of sets of the static side closing resistors. For example, the moving-side closing resistors may be set as one group, and the static-side closing resistors may be set as two groups, or only the static-side closing resistors may be set as one group, and the moving-side closing resistors may be set as two or three groups.
Embodiment 4 of the circuit breaker of the present invention:
it differs from the specific example 1 in that: in the length direction of the arc extinguish chamber, the moving-side switching-on resistor and the transmission mechanism are arranged in parallel, the connecting rod is an insulating rod and penetrates through the moving-side switching-on resistor, and the arc extinguish chamber and the circuit breaker can form a slender structure by the structural arrangement, so that the installation and the use of the circuit breaker in a special demand space are met.
Embodiment 5 of the circuit breaker of the present invention:
it differs from the specific example 1 in that: in the position shown in fig. 2, the main fracture is located at the lower side of the resistor port, the moving-side closing resistor is located at the upper side of the transmission case, the static-side closing resistor is located at the lower side of the static-side resistor contact seat, so that the moving-side closing resistor is supported on the wall of the transmission case through the moving-side insulating part, and the static-side closing resistor is hoisted on the static-side resistor contact seat through the static-side insulating part, so that the structural stability of the moving-side closing resistor and the static-side closing resistor is improved.
In other embodiments, the static closing resistor may be located on the upper side of the static resistor contact base, and the dynamic closing resistor may be located on the upper side of the transmission case, so that the static closing resistor is supported on the end cover through the static insulating element, and the dynamic closing resistor is supported on the wall of the transmission case through the dynamic insulating element.
In other embodiments, the static side closing resistor may be located on the lower side of the static side resistor contact seat, and the dynamic side closing resistor may be located on the lower side of the transmission case, so that the static side closing resistor is hoisted on the end cover through the static side insulating member, and the dynamic side closing resistor is hoisted on the case wall of the transmission case through the dynamic side insulating member.
Embodiment 6 of the circuit breaker of the present invention:
it differs from the specific example 1 in that: move the side resistance and touch the seat and fix on the terminal surface of moving the quiet support of the back of the support through moving the side insulating rod to it is located the quiet support side that deviates from of moving the support to move the side insulating rod, quiet side resistance touches the seat and fixes on the terminal surface of moving the support towards of quiet support through quiet side insulating rod, so that quiet side insulating rod is located quiet support and moves between the support, and this kind of structure setting also can reduce the size of explosion chamber on its length direction.
Embodiment 7 of the circuit breaker of the present invention:
it differs from the specific example 1 in that: move the side resistance and touch the seat and fix on the terminal surface of moving the quiet support of orientation of support through moving the side insulating rod, quiet side resistance touches the seat and fixes on the terminal surface of moving the support of orientation of quiet support through quiet side insulating rod to it all lies in quiet support and moves between the support to move side insulating rod and quiet side insulating rod, helps increasing the compactedness of explosion chamber structure, reduces the size of explosion chamber on its length direction.
Embodiment 8 of the circuit breaker of the present invention:
it differs from the specific example 1 in that: the movable side switching-on resistors are provided with three groups, the three groups of movable side switching-on resistors are connected in series end to end so as to form a Z-shaped structure, the conductive connecting end of the movable side resistor contact of each movable side switching-on resistor is far away from the movable support and is electrically connected with the movable side resistor contact seat through the movable side conductive part, and the conductive connecting end of the movable contact is close to the movable support and is electrically connected with the movable support through a bolt.
The static side switch-on resistors are correspondingly provided with three groups, the three groups of static side switch-on resistors are connected in series end to end, so that the static side switch-on resistors form a Z-shaped structure, the static side resistor conductive connecting ends of the static side switch-on resistors are far away from the static support and are fixedly connected with the static side resistor contact seat in a conductive mode through static side conductive pieces, and the static contact conductive connecting ends are close to the static support and are fixedly connected with the static support in a conductive mode through bolts.
The specific embodiment of the arc extinguishing chamber of the invention:
the structure of the arc extinguish chamber in the invention is the same as that of the arc extinguish chamber in the embodiments 1 to 8 of the circuit breaker, and the description is omitted here.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.

Claims (8)

1. An arc chute, comprising: the switching-on and switching-off main circuit comprises a moving contact and a static contact, and the moving contact and the static contact form a main fracture; the opening and closing resistance branch circuit is arranged in parallel with the opening and closing main circuit and comprises a closing resistance, a movable side resistance contact and a static side resistance contact, and the movable side resistance contact and the static side resistance contact form a resistance fracture; the transmission mechanism is in transmission connection with the operating mechanism to drive the moving contact and the moving side resistance contact so as to realize the closing and the opening of the main fracture and the resistance fracture; the dynamic side switching-on resistor is conductively connected between the dynamic contact and a dynamic side resistor contact, and the static side switching-on resistor is conductively connected between the static contact and a static side resistor contact; the arc extinguish chamber further comprises a movable support and a static support, the static support and the movable support are fixed in a breaker shell, the movable contact is arranged on the movable support in a conductive mode, the static contact is arranged on the static support in a conductive mode, the static side resistance contact is arranged on the static support in a penetrating mode, the static side resistance contact is provided with a static side resistance contact seat, the static side resistance contact seat is fixedly connected with the static support in an insulating mode, the movable side resistance contact is arranged on the movable support in a penetrating mode, the movable side resistance contact is provided with a movable side resistance contact seat, and the movable side resistance contact seat is fixedly connected with the movable support in an insulating mode so that the main fracture and the resistance fracture are located between the static support and the movable support; the moving side closing resistor and the static side closing resistor are arranged in an extending mode in the moving direction of the moving contact; the movable side closing resistors are arranged in groups, the movable side closing resistors which are arranged in groups are arranged in parallel in the direction perpendicular to the moving direction of the movable contact, the movable side closing resistors which are arranged in groups are connected in series, the movable contact conductive connecting end which is connected with the movable contact in a conductive mode on the movable side closing resistors which are connected in series is fixedly connected with the movable support in a conductive mode, and the movable side resistance contact conductive connecting end which is connected with the movable side resistance contact in a conductive mode on the movable side closing resistors which are connected in series is fixedly connected with the movable side resistance contact seat in a conductive mode; and/or quiet side closing resistance is provided with at least two sets ofly, and the quiet side closing resistance who arranges in groups arranges in parallel in the direction that the perpendicular to moving contact removed, and the quiet side closing resistance who arranges in groups establishes ties, and the static contact conductive connection end and the electrically conductive fixed connection of quiet support of electrically conductive connection with the static contact on the quiet side closing resistance who establishes ties, and the quiet side resistance contact conductive connection end and the electrically conductive fixed connection of quiet side resistance contact seat of electrically conductive connection with quiet side resistance contact on the quiet side closing resistance who establishes ties.
2. The arc extinguish chamber according to claim 1, wherein the movable side resistor contact conductive connecting end and the movable contact conductive connecting end are both arranged at one end of the movable side closing resistor close to the movable support.
3. The arc extinguish chamber according to claim 1 or 2, wherein in the moving direction of the movable contact, the movable side closing resistor is arranged on one side of the movable support, which faces away from the main fracture, one end of the movable side closing resistor, which is close to the movable support, is fixed on the movable support, and the other end, which is far away from the movable support, is fixed on the transmission mechanism through the movable side insulating part.
4. The arc extinguish chamber according to claim 3, wherein the moving side resistance contact is configured with a moving side resistance contact rod, the moving side resistance contact rod is arranged to extend along the moving direction of the movable contact, and two groups of the moving side closing resistors arranged in groups are arranged at intervals in a direction perpendicular to the moving direction of the movable contact to form a moving space for the moving side resistance contact rod to move back and forth in the moving direction of the movable contact.
5. The arc extinguish chamber according to claim 1, wherein the static side resistance contact conductive connecting end and the static contact conductive connecting end are both arranged at one end of the static side closing resistor close to the static support.
6. The arc extinguish chamber according to claim 1 or 5, wherein in the moving direction of the movable contact, the static side closing resistor is arranged on one side, facing away from the main fracture, of the static support, one end, close to the static support, of the static side closing resistor is fixed on the static support, and the other end, far away from the static support, of the static side closing resistor is fixed on the static side resistor contact seat through the static side insulating part.
7. The arc extinguish chamber according to claim 1, wherein the dynamic side electric resistance contact base is fixed on the dynamic support base through a dynamic side insulator, the static side electric resistance contact base is fixed on the static support base through a static side insulator, and at least one of the dynamic side insulator and the static side insulator is fixed between the dynamic support base and the static support base.
8. A circuit breaker, including the circuit breaker casing, be equipped with operating mechanism and explosion chamber in the circuit breaker casing, operating mechanism and explosion chamber transmission connection, characterized in that, explosion chamber be any one in claims 1 to 7 the explosion chamber.
CN202010543507.7A 2020-06-15 2020-06-15 Arc extinguish chamber and circuit breaker Active CN112151301B (en)

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