A circuit breaker and an arc extinguishing chamber thereof

Abstract

The present invention relates to a circuit breaker and an arc extinguishing chamber thereof. The arc extinguishing chamber comprises: a sealed housing, a moving and static contact assembly and a potential triggering electrode module, wherein the potential triggering electrode module comprises a potential triggering electrode having a discharge end located at a closing butt end position of the contact of the corresponding contact assembly; the potential triggering electrode is used to discharge from the discharge end toward the opposite contact at a position close to the end of the moving contact closing stroke and at the required switching phase of the circuit breaker to establish a conduction path between the moving and static contacts. The arc extinguishing chamber of the present invention is provided with a potential triggering electrode, so that at the end of the closing stroke of the moving contact, that is, in the process of being close to the static contact but not yet completely closed, as required, at the required switching phase, the potential triggering electrode can be used to trigger the generation of a breakdown path between the moving and static contacts, that is, to establish a conduction path, thereby getting rid of the constraints and restrictions of the closing control of the moving and static contacts, and achieving the purpose of accurate switching according to the required switching phase.

Description

Technical Field

[0001] The invention relates to the field of high voltage switches, and in particular to a circuit breaker and an arc extinguishing chamber thereof. Background Art

[0002] Vacuum circuit breakers are currently widely used in the interruption of AC power grids in the medium and low voltage fields. They are the core components that determine whether vacuum circuit breakers can successfully interrupt fault currents. They have the characteristics of high reliability, maintenance-free, and strong interruption capacity. In order to meet the needs of economic and industrial development, my country has gradually increased the intensity of power grid transformation and capacity expansion, and the investment in the power equipment industry has also increased significantly, which has promoted the development of vacuum interrupters towards high voltage and large capacity. Then, when the power system switches on and off inductive and capacitive electrical equipment, if the circuit breaker switching phase, time, and strategy are improperly controlled, it will bring about transient overvoltage or overcurrent, which will have a greater impact on the power equipment and power system, and have a great adverse impact on the production work of the power equipment and power system. Therefore, how to enable the arc extinguishing chamber to accurately achieve phase selection and closing is of great significance. Summary of the invention

[0003] The purpose of the present invention is to provide a circuit breaker capable of achieving accurate phase selection and closing, so as to solve the problem that the existing circuit breakers cannot achieve phase selection and closing, which has an adverse effect on power equipment and power systems. At the same time, the purpose of the present invention is also to provide an arc extinguishing chamber matching the above circuit breaker.

[0004] The arc extinguishing chamber of the present invention comprises:

[0005] A sealed housing having a closed inner cavity;

[0006] The stationary contact assembly comprises a stationary conductive rod and a stationary contact, which is relatively fixed and sealedly connected to the sealing housing;

[0007] The moving contact assembly includes a moving conductive rod and a moving contact, is arranged opposite to the stationary contact assembly, and is movably and hermetically connected to the sealed housing, and can move closer to or farther from the stationary contact assembly relative to the sealed housing to perform opening and closing actions;

[0008] The potential trigger electrode module, corresponding to one of the contact assembly arrangements, comprises:

[0009] A potential triggering electrode is insulated and isolated from a contact of a corresponding contact assembly, and has a discharge end located at a closing butt end position of the contact of the corresponding contact assembly;

[0010] The potential trigger electrode is used to discharge from the discharge end toward the opposite contact at the end position of the moving contact closing stroke and the required switching phase of the circuit breaker to establish a conduction path between the moving and static contacts.

[0011] The arc extinguishing chamber of the present invention is provided with a potential trigger electrode. At the end of the closing stroke of the moving contact, that is, in the process of approaching the static contact but not yet completely closing, the discharge of the potential trigger electrode can trigger the generation of a breakdown path between the moving and static contacts at the required switching phase as needed, that is, establish a conduction path. In this way, the constraints and restrictions of the closing control of the moving and static contacts are broken down, and the purpose of accurate switching according to the required switching phase is achieved, thereby avoiding the adverse effects of traditional circuit breakers on the power system when closing.

[0012] Furthermore, the potential trigger electrode is arranged corresponding to the stationary contact assembly, which has a simpler structure than arranging the potential trigger electrode corresponding to the moving contact assembly.

[0013] Furthermore, the potential trigger electrode extends in a straight line along the axial direction of the conductive rod of the corresponding contact, with one end extending to the closing end of the corresponding contact and the other end extending out of the sealed housing. This arrangement makes the overall structure of the arc extinguishing chamber more regular, which is convenient for ensuring the uniformity of the internal electric field.

[0014] Furthermore, the contact of the contact assembly corresponding to the potential trigger electrode is disc-shaped, the disc-shaped contact is located at the end of the conductive rod and radially protrudes from the conductive rod, a through hole penetrating in the axial direction of the conductive rod is provided on the portion of the disc-shaped contact radially protruding from the conductive rod, and one end of the potential trigger electrode extending into the through hole is a discharge end. This arrangement facilitates the fixed installation of the potential trigger electrode and helps meet the electric field requirements inside the arc extinguishing chamber.

[0015] Furthermore, the middle part of the side of the disc-shaped contact facing the other contact is a plane, the outer periphery is an inclined surface, the through hole is opened corresponding to the area where the inclined surface is located, and the discharge end extends out of the through hole and is not higher than the middle plane part. The discharge end extends out of the through hole, which is convenient for discharging toward the opposite contact and for forming a breakdown path between the moving and static contacts.

[0016] Furthermore, the potential trigger electrode module includes an insulating tube, in which the potential trigger electrode is installed, and the insulating tube is used to achieve insulation isolation between the potential trigger electrode and the contact, so that insulation isolation between the potential trigger electrode and the contact can be achieved conveniently and reliably.

[0017] Furthermore, the potential triggering electrode module is arranged close to the conductive rod, so that the electric field requirement in the arc extinguishing chamber can be better met.

[0018] In addition, the sealed shell includes a cylindrical shell and a moving end cover plate and a static end cover plate sealed and installed at both ends of the cylindrical shell. The moving contact assembly is sealed and movably installed on the moving end cover plate, and the end for closing and docking is in the cylindrical shell. The static contact assembly is sealed and fixedly installed on the static end cover plate, and one end of the potential trigger electrode module extends out of the sealed shell from the static end cover plate.

[0019] The circuit breaker of the present invention comprises:

[0020] Operating mechanism, arc extinguishing chamber and control system;

[0021] The arc extinguishing chamber includes:

[0022] A sealed housing having a closed inner cavity;

[0023] The stationary contact assembly comprises a stationary conductive rod and a stationary contact, which is relatively fixed and sealedly connected to the sealing housing;

[0024] The moving contact assembly includes a moving conductive rod and a moving contact, is arranged opposite to the stationary contact assembly, and is movably and hermetically connected to the sealed housing, and can move closer to or farther from the stationary contact assembly relative to the sealed housing to perform opening and closing actions;

[0025] The potential trigger electrode module, corresponding to one of the contact assembly arrangements, comprises:

[0026] A potential triggering electrode is insulated and isolated from a contact of a corresponding contact assembly, and has a discharge end located at a closing butt end of the contact of the corresponding contact assembly;

[0027] The potential trigger electrode is used to discharge from the discharge end to the opposite contact at the end position of the moving contact closing stroke and the required switching phase of the circuit breaker to establish a conduction path between the moving and static contacts;

[0028] The control system is connected to the operating mechanism and the potential trigger electrode module of the arc extinguishing chamber. When the moving contact is near the end position of the closing stroke and the required switching phase of the circuit breaker, the control system controls the potential trigger electrode module to discharge to the opposite contact to establish a conduction path between the moving and static contacts.

[0029] The arc extinguishing chamber of the present invention is provided with a potential trigger electrode. At the end of the closing stroke of the moving contact, that is, in the process of approaching the static contact but not yet completely closing, the discharge of the potential trigger electrode can trigger the generation of a breakdown path between the moving and static contacts at the required switching phase as needed, that is, establish a conduction path. In this way, the constraints and restrictions of the closing control of the moving and static contacts are broken down, and the purpose of accurate switching according to the required switching phase is achieved, thereby avoiding the adverse effects of traditional circuit breakers on the power system when closing.

[0030] Furthermore, the potential trigger electrode is arranged corresponding to the stationary contact assembly, which has a simpler structure than arranging the potential trigger electrode corresponding to the moving contact assembly.

[0031] Furthermore, the potential trigger electrode extends in a straight line along the axial direction of the conductive rod of the corresponding contact, with one end extending to the closing end of the corresponding contact and the other end extending out of the sealed housing. This arrangement makes the overall structure of the arc extinguishing chamber more regular, which is convenient for ensuring the uniformity of the internal electric field.

[0032] Furthermore, the contact of the contact assembly corresponding to the potential trigger electrode is disc-shaped, the disc-shaped contact is located at the end of the conductive rod and radially protrudes from the conductive rod, a through hole penetrating in the axial direction of the conductive rod is provided on the portion of the disc-shaped contact radially protruding from the conductive rod, and one end of the potential trigger electrode extending into the through hole is a discharge end. This arrangement facilitates the fixed installation of the potential trigger electrode and helps meet the electric field requirements inside the arc extinguishing chamber.

[0033] Furthermore, the middle part of the side of the disc-shaped contact facing the other contact is a plane, the outer periphery is an inclined surface, the through hole is opened corresponding to the area where the inclined surface is located, and the discharge end extends out of the through hole and is not higher than the middle plane part. The discharge end extends out of the through hole, which is convenient for discharging toward the opposite contact and for forming a breakdown path between the moving and static contacts.

[0034] Furthermore, the potential trigger electrode module includes an insulating tube, in which the potential trigger electrode is installed, and the insulating tube is used to achieve insulation isolation between the potential trigger electrode and the contact, so that insulation isolation between the potential trigger electrode and the contact can be achieved conveniently and reliably.

[0035] Furthermore, the potential triggering electrode module is arranged close to the conductive rod, so that the electric field requirement in the arc extinguishing chamber can be better met.

[0036] In addition, the sealed shell includes a cylindrical shell and a moving end cover plate and a static end cover plate sealed and installed at both ends of the cylindrical shell. The moving contact assembly is sealed and movably installed on the moving end cover plate, and the end for closing and docking is in the cylindrical shell. The static contact assembly is sealed and fixedly installed on the static end cover plate, and one end of the potential trigger electrode module extends out of the sealed shell from the static end cover plate.

[0037] Moreover, the circuit breaker further comprises a multifunctional module, which is fixedly mounted on the arc extinguishing chamber and connected to the potential trigger electrode module, and is connected to the control system, and comprises a charging unit and a battery module, so as to supply energy to the potential trigger electrode module. In this way, the potential trigger electrode module can be supplied with energy by the multifunctional module alone, and there is no need to connect a long energy supply line from the potential trigger electrode module, thereby simplifying the structure of the circuit breaker.

[0038] In addition, the arc extinguishing chamber is a vacuum arc extinguishing chamber, and the multifunctional module also includes a vacuum degree measuring module for detecting the vacuum degree in the vacuum arc extinguishing chamber. In this way, when the discharge end needs to discharge, the discharge parameters can be adjusted accordingly according to the vacuum degree in the vacuum arc extinguishing chamber, and the generation of the breakdown path can be reliably guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a structural schematic diagram of the arc extinguishing chamber part in the first embodiment of the circuit breaker of the present invention;

[0040] Figure 2 for Figure 1 Schematic diagram of the internal structure of the display part;

[0041] Figure 3 To display Figure 2 Structural diagram of the moving and static contacts, the floating potential trigger electrode module and the multifunctional module in the open state;

[0042] Figure 4 To display Figure 2 Structural diagram of the moving and static contacts, the floating potential trigger electrode module and the multifunctional module in the closed state;

[0043] Figure 5 for Figure 4 An enlarged view of the connection position between the moving and static contacts;

[0044] Figure 6 It is a structural schematic diagram of the arc extinguishing chamber of the present invention.

[0045] In the figure: 101, static conductive rod; 102, static contact; 103, moving contact; 104, moving conductive rod; 105, static end cover; 106, static contact shielding cover; 107, cylindrical shell; 108, intermediate shielding cover; 110, bellows; 111, moving contact shielding cover; 112, moving end cover; 113, ceramic insulating sleeve; 114, potential trigger electrode; 201, static contact assembly; 202, moving contact assembly; 203, multi-function module; 204, floating potential trigger electrode module. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0047] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0048] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0049] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0050] Specific embodiment 1 of the circuit breaker of the present invention:

[0051] The circuit breaker of this embodiment includes a vacuum interrupter chamber mainly used for circuit breaking, an operating mechanism connected to the vacuum interrupter chamber, and a control system. The control system is connected to the operating mechanism and can control the operation of the operating mechanism as required.

[0052] Figure 1 The structure of the arc extinguishing chamber in the circuit breaker of this embodiment is mainly shown. The arc extinguishing chamber mainly includes a sealed shell and a moving and static contact assembly 201 arranged in the sealed shell. The moving contact assembly 202 includes a moving conductive rod 104 and a moving contact 103 connected to the end of the moving conductive rod 104. The static contact assembly 201 includes a static conductive rod 101 and a static contact 102 connected to the end of the static conductive rod 101.

[0053] The sealed housing includes a cylindrical housing 107 and a moving end cover plate 112 and a static end cover plate 105 which are sealed and installed at both ends of the cylindrical housing 107. The moving contact assembly 202 is sealed and connected to the moving end cover plate 112 through a flexible connection. The end of the moving contact assembly 202 that is connected to the closing position, namely, the moving contact 103, is located in the cylindrical housing 107. The static contact assembly 201 is sealed and connected to the static end cover plate 105 and is fixedly connected to the static end cover plate 105. The end of the static contact assembly 201 that is connected to the closing position, namely, the static contact 102, is located in the cylindrical housing 107. The connection between the moving contact assembly 202 and the moving end cover plate 112 adopts the more common bellows 110 connection form, that is, one end of the bellows 110 is sealed and connected to the through hole on the moving end cover plate 112, and the other end is sealed and connected to the moving conductive rod 104 of the moving contact assembly 202, so as to achieve the sealing between the moving contact assembly 202 and the sealed housing when the opening action is performed relative to the sealed housing. The action output end of the operating mechanism is connected to the moving conductive rod 104 through a transmission structure, thereby driving the moving contact 103 to complete the opening and closing actions.

[0054] A cylindrical intermediate shielding cover 108 is fixed at the position where the moving and static contacts are opened and closed in the sealed shell, and the moving contact shielding cover 111 is fixedly connected to the inner side of the moving contact cover plate in the sealed shell, and the static contact shielding cover 106 is fixedly connected to the inner side of the static end cover plate 105, so as to respectively play the role of uniform internal electric field.

[0055] In this embodiment, a suspended potential trigger electrode module 204 is also configured in the arc extinguishing chamber. The suspended potential trigger electrode module 204 is mainly used to generate a breakdown path between the suspended potential trigger electrode module 204 and the receiving contact by discharging a high-voltage pulse to one of the contacts (referred to as the receiving contact) when the moving and static contacts are about to close but have not yet closed, and the current is at the required switching phase, thereby forcing a breakdown path to be generated between the two contacts and forcing the moving and static contacts to be turned on. Of course, in order to generate a breakdown path between the suspended potential trigger electrode module 204 and the receiving contact to cause a breakdown path to be generated between the moving and static contacts, certain requirements need to be placed on the position of the suspended potential trigger electrode module 204. Since the principle and application of generating a breakdown path between the switch contacts through the trigger electrode have been embodied in the existing trigger switch, this article will not elaborate on its working principle in detail.

[0056] In this embodiment, the assembly relationship of the floating potential trigger electrode module 204 in the arc extinguishing chamber is as follows: Figure 2-6As shown, the floating potential trigger electrode module 204 includes a potential trigger electrode 114 and a porcelain insulating tube. The potential trigger electrode 114 is linear and installed in the insulating tube. The static contact 102 and the moving contact 103 are both disc-shaped contacts. The static conductive rod 101 and the moving conductive rod 104 are both linear round rods. The diameters of the static contact 102 and the moving contact 103 are both larger than the outer diameters of the corresponding conductive rods. Therefore, the static contact 102 and the moving contact 103 both have disc parts that protrude radially from the corresponding conductive rods. The disc-shaped moving and static contacts are connected to each other through their respective side disc surfaces when the switch is closed. The side disc surface is called the docking disc surface. The middle part of the docking disc surface is a circular plane. The outer periphery of the docking disc surface is an annular inclined surface, that is, a conical surface. The disc part where the conical surface is located is the part that protrudes radially from the conductive rod. A through hole is provided on the static contact 102 on the disc portion radially protruding from the static conductive rod 101. One end of the insulating tube is inserted into the through hole, and the other end is sealed and fixedly connected to the static end cover plate 105 and extends out of the static end cover plate 105. One end of the potential trigger electrode 114 installed in the insulating tube extends out from the insulating tube, passes through the through hole and is exposed at one end of the through hole facing the moving contact 103. This end of the potential trigger electrode 114 is the discharge end, and the other end of the potential trigger electrode 114 installed in the insulating tube extends out from the insulating tube. The insulating tube and the potential trigger electrode 114 are also sealed and matched, thereby ensuring the sealing between the inner cavity of the sealed housing and the outside world.

[0057] The discharge end protrudes from the conical surface and is not higher than the circular plane. In this way, when the moving and static contacts are closed and connected, the discharge end is in the tiny gap between the conical surfaces of the moving and static contacts, and the potential trigger electrode 114 will not be collided or impacted. Of course, in other embodiments, if the discharge end is set to be flush with the docking end face of the static contact 102, it does not matter whether the discharge end is set in the area where the circular plane of the static contact 102 is located or the area where the conical surface of the static contact 102 is located; alternatively, the static contact 102 can also be a pancake-shaped structure, and the docking end face is a circular plane as a whole.

[0058] Of course, in this embodiment, preferably, in order to more easily meet the electric field requirements in the arc extinguishing chamber, the potential trigger electrode 114 module is arranged at a position close to the static conductive rod 101.

[0059] One end of the potential trigger electrode 114 located on the outside of the static end cover 105 is connected to a power supply unit. At the required time, the control system controls the power supply unit to provide a high-voltage pulse current to the potential trigger electrode 114. The discharge end of the potential trigger electrode 114 can discharge toward the moving contact 103 on the opposite side and break down the space between the two. At this time, due to the high potential difference between the moving and static contacts, the static contact 102 can establish a breakdown path with the moving contact 103 with the help of the breakdown path between the potential trigger electrode 114 and the moving contact 103, thereby realizing the conduction of the moving and static contacts, and then realizing the phase selection and switching of the circuit breaker.

[0060] Moreover, the circuit breaker switches on and off with alternating current, and the potential trigger electrode 114 emits high-voltage and high-frequency pulses. Optionally, when the potential trigger electrode 114 discharges, the polarity of the static contact 102 can be the same as that of the potential trigger electrode 114, or different, and can be both positive or negative, or one can be positive and the other negative.

[0061] As a preferred solution, in this embodiment, Figure 1 As shown, the circuit breaker is equipped with a multifunctional module 203 for the floating potential trigger electrode module 204. The multifunctional module 203 is connected to the control system and can transmit signals and electric energy with the control system. The multifunctional module 203 can be detachably installed on the static end cover plate 105 of the arc extinguishing chamber and connected to the potential trigger electrode 114 module. The multifunctional module 203 includes a wired or wireless charging unit and a battery module. The battery module can be charged by the charging unit, and the battery module energy storage can complete the triggering within a certain time and number of times. When a wireless charging unit is used, a signal transceiver module is set in the multifunctional module 203 to establish a connection with the control system, so that there is no need to arrange lines, simplifying the structure of the circuit breaker. Of course, more optimized, the multifunctional module 203 also includes a vacuum detection module, which can detect the vacuum degree in the arc extinguishing chamber. When the potential trigger electrode 114 discharges, the discharge parameters are controlled by the control system according to the vacuum degree in the arc extinguishing chamber to ensure that the breakdown path can be reliably established.

[0062] Through the introduction of the above embodiments, it can be seen that the circuit breaker of the present invention can realize accurate phase selection and switching through the potential trigger electrode 114 module, thereby avoiding the adverse effects of inappropriate switching time and phase of traditional circuit breakers on the power system.

[0063] The circuit breaker of the present invention is not limited to the embodiments described above. In other embodiments, the outer side of the potential trigger electrode of the potential trigger electrode module is coated with an insulating layer to achieve insulation isolation between it and the static contact; the suspended potential trigger electrode module can also correspond to the moving contact configuration, in which case it is required to move synchronously with the moving contact, and the assembly method, position relationship, etc. between the suspended potential trigger electrode module and the arc extinguishing chamber and the moving contact assembly are corresponding and consistent with the assembly method, position relationship, etc. between the suspended point trigger electrode module and the arc extinguishing chamber and the static contact assembly described in the above embodiments; in other embodiments, the suspended potential trigger electrode module can be configured to move synchronously with the moving contact, and ... In the embodiment, the potential trigger electrode can also be arranged in a spiral shape around the conductive rod corresponding to the contact, with the discharge end exposed from the contact and the other end passing through the arc extinguishing chamber from the tail of the conductive rod; in other embodiments, the contact can be directly composed of the end of the conductive rod, and the discharge end of the potential trigger electrode is at the edge of the end of the conductive rod, and is used to discharge toward the contact on the opposite side; in other embodiments, the arc extinguishing chamber can be an arc extinguishing chamber filled with insulating gas (sulfur hexafluoride or nitrogen), and at this time, the vacuum detection module of the multi-function module can be correspondingly replaced with a pressure detection module for detecting the pressure of the insulating gas.

[0064] The specific structure of the arc extinguishing chamber in the specific embodiment of the present invention is the same as the structure of the arc extinguishing chamber in the various embodiments of the circuit breaker introduced above, and will not be described in detail herein.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. An arc extinguishing chamber, comprising: A sealed housing having a closed inner cavity; The stationary contact assembly comprises a stationary conductive rod and a stationary contact, which is relatively fixed and sealedly connected to the sealing housing; The moving contact assembly includes a moving conductive rod and a moving contact, is arranged opposite to the stationary contact assembly, and is movably and hermetically connected to the sealed housing, and can move closer to or farther from the stationary contact assembly relative to the sealed housing to perform opening and closing actions; Its characteristic is that the arc extinguishing chamber also includes: The potential trigger electrode module is arranged corresponding to the stationary contact assembly and includes: The potential trigger electrode is insulated and isolated from the contact of the static contact assembly, and has a discharge end located at the closing and docking end of the contact of the static contact assembly. A through hole is provided on the portion of the static contact radially protruding from the static conductive rod, and one end of the potential trigger electrode extending into the through hole is the discharge end. The static contact is disc-shaped, and the middle part of the side surface of the disc-shaped contact facing the moving contact is a plane, and the outer periphery is a conical surface. The through hole is provided in the area corresponding to the conical surface, and the discharge end protrudes from the conical surface and is not higher than the middle plane. The potential trigger electrode is used to discharge from the discharge end toward the moving contact at the end position of the moving contact closing stroke and the required switching phase of the circuit breaker to establish a conduction path between the moving and static contacts.

2. The arc extinguishing chamber according to claim 1, characterized in that: The potential trigger electrode extends in a straight line along the axial direction of the conductive rod of the stationary contact, with one end extending to the closing butt end of the stationary contact and the other end extending out of the sealed housing.

3. The arc extinguishing chamber according to claim 2, characterized in that: The disc-shaped contact is located at the end of the conductive rod and radially protrudes from the conductive rod. A through hole penetrating in the axial direction of the conductive rod is provided on the portion of the disc-shaped contact radially protruding from the conductive rod.

4. The arc extinguishing chamber according to claim 2, characterized in that: The potential trigger electrode module comprises an insulating tube, in which the potential trigger electrode is installed, and the insulating tube is used to achieve insulation isolation between the potential trigger electrode and the contact.

5. The arc extinguishing chamber according to claim 2, characterized in that: The potential triggering electrode module is arranged close to the conductive rod.

6. The arc extinguishing chamber according to claim 4, characterized in that: The sealed shell includes a cylindrical shell and a moving end cover plate and a static end cover plate sealed and installed at both ends of the cylindrical shell. The moving contact assembly is sealed and movably installed on the moving end cover plate, and the end for closing and docking is in the cylindrical shell. The static contact assembly is sealed and fixedly installed on the static end cover plate, and one end of the potential trigger electrode module extends out of the sealed shell from the static end cover plate.

7. A circuit breaker comprising: Operating mechanism, arc extinguishing chamber and control system; It is characterized in that the arc extinguishing chamber is the arc extinguishing chamber according to any one of claims 1 to 6, The control system is connected to the operating mechanism and the potential trigger electrode module of the arc extinguishing chamber. When the moving contact is near the end position of the closing stroke and the required switching phase of the circuit breaker, the control system controls the potential trigger electrode module to discharge to the moving contact to establish a conduction path between the moving and static contacts.

8. The circuit breaker according to claim 7, characterized in that: The circuit breaker also includes a multifunctional module, which is fixedly mounted on the arc extinguishing chamber and connected to the potential triggering electrode module. The multifunctional module is connected to the control system and includes a charging unit and a battery module to supply energy to the potential triggering electrode module.

9. The circuit breaker according to claim 8, characterized in that: The arc extinguishing chamber is a vacuum arc extinguishing chamber, and the multifunctional module further comprises a vacuum degree measuring module for detecting the vacuum degree in the vacuum arc extinguishing chamber.

Images