A recoverable contact with excitation function

Abstract

A kind of recoverable contactors with excitation function, including shell, contact system, drive system, electronic ignition component and action execution component;Electronic ignition component includes electronic ignition tube shell and electronic ignition tube, exhaust hole is opened in electronic ignition tube shell and communicated with outside;One end of action execution component supported by elastic component is located in electronic ignition tube shell, and the other end is set corresponding to movable contact component;When abnormal situation, electronic ignition tube releases high-pressure gas and drives action execution component displacement, so that movable contact component and static contact are opened and tripped with large opening distance, high-pressure gas in shell is discharged to outside of shell by exhaust hole, and movable contact component resets to normal tripping position.By the setting of exhaust hole and elastic component, after main circuit is disconnected when abnormal situation, contactor can recover normal opening and closing function.

Description

Technical Field

[0001] This invention relates to the field of circuits, specifically to a resettable contactor with excitation function used for controlling circuit switches and circuit protection. Background Technology

[0002] Currently, protection schemes in DC circuits generally rely on matching DC contactors with fuses. However, due to the limited breaking capacity of contactors, when a short-circuit current occurs in the circuit, the fuse blows to resolve the issue. If the fuse and contactor are not properly matched, and the fuse fails to blow in time, the contactor may explode or its contacts may stick together. In such cases, the product cannot be used further. Furthermore, after a fuse blows, it needs to be removed and replaced, resulting in high maintenance costs. Replacing a fuse also requires disassembling the copper busbar, demanding a high level of expertise from maintenance personnel. Additionally, the high-voltage DC contactors used in electric vehicles often employ a sealed gas-filled design to meet their high-current breaking requirements, resulting in complex processes and high costs. Summary of the Invention

[0003] The purpose of this invention is to integrate an excitation device into the contactor so that, in the event of an abnormal situation, the excitation device can promptly force the contact system to trip, disconnect the main circuit, and protect the main circuit. At the same time, by setting an exhaust port, the normal function of the contactor can be restored after the contactor trips at a large opening distance.

[0004] To achieve the above objectives, the present invention provides a resettable contactor with excitation function, comprising a housing, a contact system, a drive system, an electronic ignition assembly, and an actuation assembly;

[0005] The contact system includes a moving contact assembly and a stationary contact, and the driving system drives the moving contact assembly to move and open / close with the stationary contact;

[0006] The electronic ignition assembly is disposed on the housing and is in sealed contact with the housing; the electronic ignition assembly includes an electronic ignition tube housing and an electronic ignition tube fixedly disposed in the electronic ignition tube housing, and an exhaust port communicating with the outside is provided on the electronic ignition tube housing;

[0007] One end of the actuation component is disposed corresponding to the moving contact component, and the other end is located in the housing of the electronic ignition tube, and is in sealed contact with the housing of the electronic ignition tube. The driving force released by the electronic ignition tube acts on one end of the actuation component located in the housing of the electronic ignition tube. The actuation component is supported by an elastic component. In the initial position, the one end of the actuation component located in the housing of the electronic ignition tube prevents the exhaust port from communicating with the cavity where the high-pressure gas is released from the electronic ignition tube.

[0008] During normal operation, the drive system drives the contact system to perform opening and closing operations under normal conditions;

[0009] In case of an abnormal situation, the electronic ignition tube releases high-pressure gas as a driving force to drive the actuation component to displace, thereby driving the moving contact component to open the circuit with a large gap between the moving contact and the stationary contact. During the large-gap opening process, the elastic force of the elastic component gradually increases. After the large-gap opening, the high-pressure gas inside the housing is discharged to the outside of the housing through the exhaust port. When the elastic force of the elastic component is greater than the gas pressure inside the housing, the actuation component resets under the action of the elastic force of the elastic component, and then the moving contact component resets to the position where it was normally opened.

[0010] Preferably, the reset time of the moving contact assembly is adjusted by the size and / or length of the vent hole.

[0011] Preferably, the elastic component is a spring component.

[0012] Preferably, the spring assembly consists of springs with different stiffness coefficients.

[0013] Preferably, in the spring assembly, the spring with a small stiffness coefficient directly abuts against the actuation component, while the spring with a large stiffness coefficient abuts between the spring with the small stiffness coefficient and the housing.

[0014] Preferably, the spring assembly includes a first spring, a second spring and a disc spring located within the first spring, wherein the stiffness coefficients of the first spring and the second spring are less than the stiffness coefficient of the disc spring; the disc spring abuts against the adjacent end of the second spring, and the opposite end, as well as both ends of the first spring, abut against one end of the housing and one end of the actuation component, respectively; the disc spring is located between the second spring and the housing.

[0015] Preferably, a sleeve is provided in the electronic ignition housing, one end of the actuation component is located in the sleeve and is in sealed contact with the sleeve; an exhaust hole communicating with the electronic ignition tube is provided on the sleeve.

[0016] Preferably, a through hole is provided on the shell wall of the housing, and a tubular adapter is provided in the through hole. One end of the adapter is closed and the other end is open. The open end of the adapter is sealed to the outer periphery of the shell of the through hole. The outer shell of the electronic ignition tube is in sealed contact with the housing. The actuation component passes through the sealed end of the adapter. The elastic component is sleeved on the outer periphery of the actuation component, with one end abutting against the sealed end of the adapter and the other end abutting against the end of the actuation component located in the outer shell of the electronic ignition tube.

[0017] Preferably, one end of the adapter opening is a flanged structure, which is mounted on the surface of the housing facing the electronic ignition assembly, and the electronic ignition tube housing is in sealed contact with the flanged structure.

[0018] Preferably, the action execution component includes a piston and a push rod assembly, the push rod assembly includes a push rod and a push rod head, the piston is disposed corresponding to the moving contact assembly, the push rod head is located in the electronic ignition tube housing and is in sealed contact with the electronic ignition tube housing, the push rod passes through the adapter and is connected to the piston and the push rod head respectively; the elastic component is sleeved on the push rod.

[0019] Preferably, the push rod is threaded to the push rod head and fixedly connected to the piston. A limiting structure is provided on the outer periphery of the push rod located in the chamber where the contact system is located. In the initial position, the limiting structure abuts against the shell wall of the housing.

[0020] Preferably, the moving contact assembly includes a moving contact support assembly and a moving contact plate. The moving contact support assembly includes a mounting base, a bracket, a stationary magnet, a moving magnet, and a contact spring. The bracket is connected to the mounting base. The stationary magnet is fixedly connected to the end of the bracket away from the mounting base. The moving contact plate is connected and fixed to the moving magnet. The contact spring is disposed between the moving magnet and the mounting base.

[0021] Preferably, a magnetic steel frame is provided on both opposite outer sides of the displacement path of the moving contact assembly, and a permanent magnet is provided on the magnetic steel frame.

[0022] Preferably, a metal wire mesh is provided on the outside of the displacement path of the moving contact assembly, and the permanent magnet blows the electric arc generated when the contact system opens and closes to the metal wire mesh to extinguish the arc.

[0023] The resettable contactor of this invention, through an electronic ignition component, can promptly trip the contact system and disconnect the main circuit to achieve main circuit protection in the event of an abnormal situation. Simultaneously, the vent reduces the gas pressure inside the housing, making the spring force greater than the internal gas pressure, thereby restoring the contactor to its normal tripped position and enabling it to regain normal opening and closing functions. By combining the vent with an elastic component, the moving contact assembly is reset, allowing the contactor to resume normal opening and closing operations. The reset time of the moving contact assembly can be controlled by adjusting the size and length of the vent.

[0024] By using springs with different stiffness coefficients to form a spring assembly, the displacement speed of the actuating component can be quickly reduced after the moving contact assembly and stationary contact are disconnected. This allows the moving contact assembly to stop moving quickly after reaching the disconnected position, preventing the moving contact assembly from continuously moving at high speed and causing damage to it.

[0025] An exhaust port is provided in the housing of the electronic ignition tube. When the moving contact assembly is disconnected from the stationary contact, the gas inside the housing is partially discharged to the outside of the housing through the exhaust port, thereby reducing the pressure inside the housing and avoiding the impact on the housing caused by the housing being under high pressure, thus improving the safety and reliability of the housing. At the same time, the reset time of the moving contact assembly can be adjusted by the size and length of the exhaust port.

[0026] The integrated electronic ignition assembly enables main circuit protection in case of abnormal situations. At the same time, the moving and stationary contacts of the contactor can still engage normally, effectively preventing explosions or contactor contact sticking that may occur due to the fuse not blowing in time. Furthermore, it eliminates the need to fill the contactor with arc-extinguishing gas; arc extinguishing can be achieved by setting up a metal wire mesh, a magnetic steel frame, and a permanent magnet, reducing the complexity of the gas filling process and effectively lowering costs. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0028] Figure 2 This is a schematic diagram of the action execution component and the electronic ignition component.

[0029] Figure 3 This is a schematic diagram of the exhaust port structure.

[0030] Figure 4 This is a schematic diagram of the moving contact assembly.

[0031] Figure 5 This is a schematic diagram of the moving contact assembly in the initial position.

[0032] Figure 6 This is a schematic diagram of the moving contact assembly after closing.

[0033] Figure 7 This is a schematic diagram of the iron core assembly structure.

[0034] Figure 8 This is a schematic diagram of the push rod assembly structure.

[0035] Figure 9 This is a schematic diagram of the electronic ignition assembly.

[0036] Figure 10 This is a schematic diagram of the spring assembly structure.

[0037] Figure Labels

[0038] 1. Electronic ignition tube; 2. Sleeve; 3. First spring; 4. Second spring; 5. Disc spring; 6. Adapter; 7. Sealing ring; 8. Sealing gasket; 9. Piston; 10. Metal wire mesh; 11. Moving contact plate; 12. Permanent magnet; 13. Magnet frame; 14. Coil; 15. Push rod assembly; 15. Push rod head; 151. Push rod; 152. Iron core assembly; 16. Moving iron core; 161. Stationary iron core; 162. Contact bracket assembly; 17. Bracket; 171. Stationary magnetic conductor; 172. Moving magnetic conductor; 173. Bracket base; 174. Contact spring; 18. Upper housing; 19. Lower housing; 20. Electronic ignition tube outer shell; 21. Support plate; 22. Stationary contact; 23. Exhaust port; 211. Detailed Implementation

[0039] The resettable contactor with excitation function of the present invention includes a housing, a contact system, a drive system, an electronic ignition assembly, and an actuation assembly;

[0040] The contact system includes a moving contact assembly and a stationary contact, and the drive system drives the moving contact assembly to move and open / close with the stationary contact;

[0041] The electronic ignition assembly is mounted on the housing and is in sealed contact with the housing; the electronic ignition assembly includes an electronic ignition tube housing and an electronic ignition tube fixedly mounted in the electronic ignition tube housing, and an exhaust port communicating with the outside is provided on the electronic ignition tube housing.

[0042] One end of the actuation component is set corresponding to the moving contact component, and the other end is located in the housing of the electronic ignition tube, making sealed contact with the housing of the electronic ignition tube. The driving force released by the electronic ignition tube acts on one end of the actuation component located in the housing of the electronic ignition tube. The actuation component is supported by an elastic component. In the initial position, the one end of the actuation component located in the housing of the electronic ignition tube prevents the exhaust port from communicating with the cavity where the high-pressure gas is released from the electronic ignition tube.

[0043] During normal operation, the drive system drives the contact system to perform opening and closing operations under normal conditions;

[0044] In case of an abnormal situation, the electronic ignition tube releases high-pressure gas as a driving force to drive the actuation component to move, and drive the moving contact component to open the circuit with a large gap between the moving and stationary contacts. During the large-gap opening process, the elastic force of the elastic component gradually increases. After the large-gap opening, the high-pressure gas inside the housing is discharged to the outside of the housing through the exhaust port. When the elastic force of the elastic component is greater than the gas pressure inside the housing, the actuation component is reset under the action of the elastic force of the elastic component. Subsequently, the moving contact component is reset to the position where it was normally opened.

[0045] Large opening distance tripping refers to the position where the moving contact plate assembly is forcibly driven to trip after the electronic ignition component is activated. In this tripping position, the distance between the moving contact plate and the stationary contact is greater than the distance between the moving contact plate and the stationary contact during normal tripping.

[0046] The following describes preferred embodiments in detail with reference to the accompanying drawings. The directional terms used are for reference only and do not constitute a limitation on the technical solution of this invention.

[0047] The resettable contactor with excitation function of the present invention, see [link / reference]. Figures 1 to 9 It includes a housing, a contact system, a magnetic drive system, an electronic ignition assembly, and an actuation assembly;

[0048] The magnetic drive system drives the contact system to open and close. When an abnormal situation occurs, the electronic ignition component activates, releasing high-pressure gas as a driving force to drive the actuation component to move. The actuation component drives the moving contact component to move away from the stationary contact, forcing the contact system to open with a large gap and disconnect the main circuit.

[0049] The housing is formed by joining an upper housing 19 and a lower housing 20. A magnetic guide plate is disposed between the upper housing 19 and the lower housing 20, dividing the internal space of the housing into two chambers. The magnetic drive system and the contact system are located in different chambers within the housing. The magnetic drive system includes a drive coil 14, an iron core assembly 16, and a return spring. See also... Figure 1 and Figure 7 The core assembly 16 includes a moving core 161 and a stationary core 162. The stationary core 162 is a sleeve-shaped structure disposed in the hollow part of the drive coil 14, with one end connected and fixed to a partition plate and the other end sealed. The moving core 161 is movably disposed within the stationary core 162. A reaction spring is disposed between the moving core 161 and the magnetic guide plate.

[0050] A moving guide rod is fixedly installed on the moving iron core 161. One end of the moving guide rod passes through the magnetic plate and is located in the chamber where the contact system is located. A moving contact support assembly 17 is installed on the moving guide rod.

[0051] A receiving groove is provided on the side wall of the upper housing 19. A magnetic steel frame 13 is provided on the outside of the receiving groove, and a permanent magnet 12 is installed on the inside of the magnetic steel frame 13. The magnetic steel frame 13 is mounted on a magnetic guide plate.

[0052] The contact system includes a moving contact assembly and two stationary contacts 23. See also Figures 4 to 6The moving contact assembly includes a moving contact support assembly 17 and a moving contact plate 11. The moving contact support assembly 17 includes a support 171, a stationary magnetic conductor 172, a moving magnetic conductor 173, and a support base 174. The support base 174 is fixedly connected to the moving guide rod, and the support 171 is attached to the support base 174 via a snap-fit ​​connection. Between the support 171 and the support base 174, the stationary magnetic conductor 172, the moving contact plate 11, and the moving magnetic conductor 173 are arranged sequentially from top to bottom. A contact spring 18 in a compressed state is provided between the moving magnetic conductor 173 and the support base 174. The stationary magnetic conductor 172 is fixedly connected to the top of the support 171. The moving magnetic conductor 173 has a U-shaped structure, and the moving contact plate 11 is engaged in the U-shaped groove of the moving magnetic conductor 173 and moves together with the moving magnetic conductor 173. When the circuit is closed, as the moving iron core is displaced, the stationary contact abuts against the moving contact plate 11. The moving contact plate 11 and the moving magnetic conductor 173 move away from the stationary magnetic conductor 172. At the same time, the magnetic force of the stationary magnetic conductor 172 attracts the moving magnetic conductor to move towards the stationary magnetic conductor, preventing the moving contact plate from bouncing and improving short-term withstand capability.

[0053] Two stationary contacts 23 are insulated and fixedly mounted on the top of the upper housing 19, with one end located outside the housing and the other end inside, corresponding to the moving contact plate 11. The contact surfaces of the stationary contacts 23 and the upper housing 19 are sealed. An annular mounting structure is provided on the top outer surface of the upper housing 19, and a through hole penetrating the inside and outside of the upper housing is opened in the top of the upper housing 19 within the annular mounting structure. A connector 6 is inserted through this through hole. The connector 6 has a tubular structure and a certain rigidity, providing support for the elastic component. Preferably, one end of the connector 6 is closed and the other end is open. One open end of the connector 6 is provided with a flange structure, which is attached to the top outer surface of the upper housing 19 and sealed to the upper housing 19 by welding. The closed end is located in the through hole at the top of the upper housing 19.

[0054] A metal wire mesh 10 is provided on the outside of the moving contact support assembly and the stationary contact. Under the magnetic force of the permanent magnet 12, the generated electric arc can be blown to the metal wire mesh 10 to extinguish the arc.

[0055] See Figure 2 and Figure 9The electronic ignition assembly includes an electronic ignition housing 21 and an electronic ignition tube 1 fixedly installed in the electronic ignition tube housing 21. The electronic ignition tube housing 21 is installed in the annular mounting structure of the upper housing 19. The electronic ignition tube housing 21 is a tubular structure. The electronic ignition tube 1 is fixedly installed on the top of the electronic ignition tube housing 21, and the top is closed. One end of the electronic ignition tube 1 that releases the driving force is located in the electronic ignition tube housing 21. The electronic ignition tube 1 can be installed in the electronic ignition tube housing 21 by interference fit or by other fixing methods. For easy disassembly, the electronic ignition tube housing 21 is preferably installed in the annular mounting structure by a pluggable connection, such as by screw connection to the housing or by snap-fit ​​connection. When the electronic ignition tube 1 is activated, the electronic ignition tube housing and the electronic ignition tube can be replaced. An exhaust port 211 is provided on the electronic ignition tube housing 21, and the exhaust port 211 communicates with the outside of the housing.

[0056] The end of the electronic ignition tube housing 21 abuts against the flanged structure of the adapter 6. A sealing gasket 8 is provided between the end of the electronic ignition tube housing 21 and the flanged structure of the adapter 6 to ensure a sealed contact between the end of the electronic ignition tube housing 21 and the flanged structure of the adapter 6. A sleeve 2 is provided inside the electronic ignition tube housing 21, and the sleeve 2 is fitted against the inner wall of the electronic ignition tube housing 21. One end of the sleeve 2 abuts against the top of the electronic ignition tube housing 21, and the other end is on the flanged structure of the adapter 6. An exhaust hole communicating with the exhaust hole 211 is provided at the position corresponding to the exhaust hole 211 on the sleeve 2. In the initial position, the actuation component closes the exhaust port 211. The exhaust port 211 can be closed by the end of the actuation component directly closing the exhaust port on the sleeve, or by the end of the actuation component extending beyond the exhaust port on the sleeve, isolating the exhaust port 211 from the cavity where the end of the electronic ignition tube 1 releases high-pressure gas. Only when the actuation component actuates, causing the moving contact plate and the stationary contact to open at a large distance, can the exhaust port 211 communicate with the cavity where the end of the electronic ignition tube 1 releases high-pressure gas, thereby discharging the high-pressure gas to the outside of the housing and reducing the gas pressure acting on the end of the actuation component.

[0057] By adjusting the size and length of the exhaust port 211, or simultaneously adjusting both, the speed and volume of gas discharged from the housing to the outside of the housing can be changed, thereby adjusting the time of gas pressure change within the housing and thus regulating the reset time of the moving contact assembly. In this embodiment, a sleeve is provided; however, in some embodiments, a sleeve may not be provided in the electronic ignition tube housing.

[0058] The actuation components include a push rod assembly 15 and a piston 9. In the chamber containing the contact system, a piston 9 is positioned corresponding to the moving contact plate 11. The push rod assembly 15 is fixedly connected to the piston 9. The placement of the piston 9 does not affect the normal opening and closing operation of the contact system. (See reference...) Figure 8 The push rod assembly 15 includes a push rod head 151 and a push rod 152. The piston 9 is fixedly connected to one end of the push rod 152, and the other end of the push rod 152 is threadedly connected to the push rod head 151. The push rod head 151 is located in the sleeve 2 inside the electronic ignition tube housing 21, and the push rod 151 passes through the adapter 6 and is connected to the push rod head 151. A limiting structure is provided on the outer periphery of the push rod 152 outside the piston 9. In the initial position, the limiting structure is engaged at one end of the through hole at the top inside the upper housing 19. A sealing ring 7 is provided on the outer periphery of the push rod head 151 to ensure a sealed contact between the push rod head 151 and the sleeve 2.

[0059] A resilient assembly is provided between the push rod head 151 and the closed end of the adapter 6. See Figure 10 The elastic component is a spring assembly, which consists of at least two springs with different stiffness coefficients. In this embodiment, the spring assembly includes a first spring 3, a second spring 4, and several disc springs 5. The stiffness coefficients of the first spring 3 and the second spring 4 are smaller than the stiffness coefficients of the disc springs 5. That is, the first spring 3 and the second spring 4 are easier to compress or stretch than the disc springs 5. The stiffness coefficients of the first spring 3 and the second spring 4 can be different. The first spring 3 is fitted against the inner wall of the adapter 6 and the sleeve 2. Several stacked disc springs 5 ​​are arranged within the first spring 3. One end of each disc spring 5 is located at the closed end of the adapter 6 and is supported by the closed end of the adapter 6. A support plate 22 is located on the other end of each disc spring 5, and a second spring 4 is mounted on the support plate 22. The push rod head 151 is located above the first spring 3 and the second spring 4. The first spring 3, the second spring 4, and the disc springs 5 ​​are all in a compressed state. The push rod head 151 is supported by the first spring 3, the second spring 4, and the disc springs 5. Under the support of the spring force, the limiting structure on the push rod 152 is engaged with the top of the upper housing, providing support and positioning for the initial position of the piston 9. The high-pressure gas release end of the electronic ignition tube 1 is positioned corresponding to the push rod head 151. In the initial position, the push rod head 151 isolates the exhaust port 211 at the sleeve 2 from the chamber containing the high-pressure gas release end of the electronic ignition tube 1. When the push rod head 151 moves the piston 9 and causes the moving contact plate 11 to separate from the stationary contact, the push rod head 151 passes through the opening of the exhaust port 211 at the sleeve 2, so that the chamber where the high-pressure gas release end of the electronic ignition tube 1 is located is connected to the exhaust port 211, and a part of the high-pressure gas is discharged to the outside of the housing through the exhaust port 211, thereby reducing the gas pressure inside the housing.

[0060] Working principle:

[0061] Under normal operating conditions, the magnetic drive system drives the moving iron core, which in turn moves the moving contact support assembly and the moving contact plate 11, causing the moving contact plate 11 to make conductive contact with the stationary contact 23, thus closing the contact system. During the closing process, as soon as the moving contact plate 11 contacts the stationary contact 23, the stationary contact 23 obstructs the moving contact plate 11. As the moving iron core moves further, the moving contact plate 11 further abuts against the stationary contact 23, causing the moving contact plate 11 to move further away from the upper magnetic conductor. The contact spring is further compressed until the moving iron core stops moving. Because the magnetic force of the upper magnetic conductor acts on the lower magnetic conductor, when an electro-repulsive force is generated, the magnetic force exerted by the upper magnetic conductor on the lower magnetic conductor can counteract the electro-repulsive force, improving the short-term withstand performance of the contact system during closing.

[0062] When an abnormal situation occurs (such as a short circuit current or other situations requiring immediate disconnection of the contact system), the electronic ignition tube 1 acts according to the received trigger signal, releasing high-pressure gas as a driving force to drive the push rod assembly 15, which in turn moves the piston 9 along the sleeve 2 toward the moving contact plate 11. The piston 9 drives the moving contact plate 11, along with the moving contact support assembly and the moving iron core, to move away from the stationary contact 23, thus forcibly opening the circuit. During the opening process of the chamber, the push rod assembly further compresses the first spring 3 and the second spring 4. As the first and second springs are further compressed to incompressibility, the disc spring 5 begins to be compressed. When the disc spring 5 begins to be compressed, the moving contact plate and the stationary contact have already disengaged, and the circuit is forcibly opened. At this time, the speed of the piston 9 can be reduced rapidly. Therefore, as the disc spring 5 is further compressed, due to the large stiffness coefficient of the disc spring 5, the generated elastic force is relatively large. Thus, the piston 9 can quickly reduce its speed until it stops moving. At this time, the moving contact plate 11 is in the large-opening-distance opening position. As the push rod assembly moves, once the moving contact plate disengages from the stationary contact and the forced tripping is successful, the push rod head passes the vent 211. A portion of the high-pressure gas released by the electronic ignition tube is discharged from the housing through the vent 211, reducing the gas pressure inside the housing, shortening the period the housing is subjected to high-pressure gas, and improving the housing's safety performance. As the gas pressure decreases, the moving contact plate remains in the large-distance tripping position for a period of time; the duration of this position is determined by the size and length of the vent vent. When the gas pressure inside the housing decreases to a certain level, the elastic force of the first spring, the second spring, and the disc spring exceeds the gas pressure. Under the action of this elastic force, the push rod assembly, along with the piston 9, resets. The moving contact plate and the moving contact support assembly, under the combined action of the contact spring and the reaction spring, reset to the position where the contact system was tripped. Once the abnormal situation is resolved, the magnetic drive system can restart the contact system's tripping and closing mechanism. To restore the contactor's energizing function, since the electronic ignition assembly is pluggable and mounted on the housing, after the electronic ignition assembly trips to protect the main circuit, it is only necessary to remove the electronic ignition assembly and replace the electronic ignition tube or the electronic ignition assembly itself.

[0063] During normal and forced tripping, the generated arc is blown towards the metal wire mesh 10 under the magnetic force of the permanent magnet 12, causing the arc to lengthen. At the same time, the arc is segmented and cooled by the metal wire mesh 10, thereby extinguishing the arc.

[0064] By adjusting the size and length of the vent hole, the rate at which the gas pressure inside the housing decreases can be adjusted, thereby regulating the reset time of the moving contact plate.

[0065] The integrated electronic ignition assembly enables main circuit protection in case of abnormal situations. At the same time, the moving and stationary contacts of the contactor can still engage normally, effectively preventing explosions or contactor contact sticking that may occur due to the fuse not blowing in time. Furthermore, it eliminates the need to fill the contactor with arc-extinguishing gas; arc extinguishing can be achieved by setting up a metal wire mesh, a magnetic steel frame, and a permanent magnet, reducing the complexity of the gas filling process and effectively lowering costs.

Claims

1. A resettable contactor with excitation function, characterized in that, It includes the housing, contact system, drive system, electronic ignition assembly, and actuation assembly; The contact system includes a moving contact assembly and a stationary contact, and the driving system drives the moving contact assembly to move and open / close with the stationary contact; The electronic ignition assembly is disposed on the housing and is in sealed contact with the housing; the electronic ignition assembly includes an electronic ignition tube housing and an electronic ignition tube fixedly disposed in the electronic ignition tube housing, and an exhaust port communicating with the outside is provided on the electronic ignition tube housing; One end of the action execution component is disposed corresponding to the moving contact component, and the other end is located in the housing of the electronic ignition tube and is in sealed contact with the housing of the electronic ignition tube. The driving force released by the electronic ignition tube acts on one end of the action execution component located in the housing of the electronic ignition tube. The action execution component is supported by an elastic component. In the initial position, one end of the action execution component located in the housing of the electronic ignition tube prevents the exhaust port from communicating with the cavity where the high-pressure gas is released from the electronic ignition tube. During normal operation, the drive system drives the contact system to perform opening and closing operations under normal conditions; In case of an abnormal situation, the electronic ignition tube releases high-pressure gas as a driving force to drive the actuation component to displace, thereby driving the moving contact component to open the circuit with a large gap between the moving contact and the stationary contact. During the large-gap opening process, the elastic force of the elastic component gradually increases. After the large-gap opening, the high-pressure gas inside the housing is discharged to the outside of the housing through the exhaust port. When the elastic force of the elastic component is greater than the gas pressure inside the housing, the actuation component resets under the action of the elastic force of the elastic component, and then the moving contact component resets to the position where it was normally opened.

2. The resettable contactor according to claim 1, characterized in that, The reset time of the moving contact assembly can be adjusted by the size and / or length of the vent hole.

3. The resettable contactor according to claim 1, characterized in that, The elastic component is a spring assembly.

4. The resettable contactor according to claim 3, characterized in that, The spring assembly consists of springs with different stiffness coefficients.

5. The resettable contactor according to claim 3, characterized in that, In the spring assembly, the spring with a small stiffness coefficient directly abuts against the actuation component, while the spring with a large stiffness coefficient abuts between the spring with the small stiffness coefficient and the housing.

6. The resettable contactor according to claim 5, characterized in that, The spring assembly includes a first spring, a second spring and a disc spring located within the first spring, wherein the stiffness coefficients of the first spring and the second spring are less than the stiffness coefficient of the disc spring; the disc spring abuts against the adjacent end of the second spring, and the opposite end, as well as both ends of the first spring, abut against one end of the housing and one end of the actuation assembly, respectively; the disc spring is located between the second spring and the housing.

7. The resettable contactor according to claim 1, characterized in that, A sleeve is provided in the electronic ignition housing, one end of the action execution component is located in the sleeve and is in sealed contact with the sleeve; an exhaust hole communicating with the electronic ignition tube is provided on the sleeve.

8. The resettable contactor according to claim 1, characterized in that, A through hole is provided on the shell wall of the housing, and a tubular adapter is provided in the through hole. One end of the adapter is closed and the other end is open. The open end of the adapter is sealed to the outer periphery of the housing of the through hole. The outer shell of the electronic ignition tube is in sealed contact with the housing. The actuation component passes through the sealed end of the adapter. The elastic component is sleeved on the outer periphery of the actuation component, with one end abutting against the sealed end of the adapter and the other end abutting against the end of the actuation component located in the outer shell of the electronic ignition tube.

9. The resettable contactor according to claim 8, characterized in that, One end of the adapter opening is a flanged structure, which is mounted on the surface of the housing facing the electronic ignition assembly. The outer shell of the electronic ignition tube is in sealed contact with the flanged structure.

10. The resettable contactor according to claim 8, characterized in that, The actuation component includes a piston and a push rod assembly. The push rod assembly includes a push rod and a push rod head. The piston is positioned corresponding to the moving contact assembly. The push rod head is located in the housing of the electronic ignition tube and is in sealed contact with the housing of the electronic ignition tube. The push rod passes through the adapter and is connected to the piston and the push rod head respectively. The elastic component is sleeved on the push rod.

11. The resettable contactor according to claim 10, characterized in that, The push rod is threadedly connected to the push rod head and fixedly connected to the piston. A limiting structure is provided on the outer periphery of the push rod located in the chamber where the contact system is located. In the initial position, the limiting structure abuts against the shell wall of the housing.

12. The resettable contactor according to claim 1, characterized in that, The moving contact assembly includes a moving contact support assembly and a moving contact plate. The moving contact support assembly includes a mounting base, a bracket, a stationary magnetic conductor, a moving magnetic conductor, and a contact spring. The bracket is connected to the mounting base. The stationary magnetic conductor is fixedly connected to the end of the bracket away from the mounting base. The moving contact plate is connected and fixed to the moving magnetic conductor. The contact spring is disposed between the moving magnetic conductor and the mounting base.

13. The resettable contactor according to claim 1, characterized in that, A magnetic steel frame is provided on both opposite sides of the displacement path of the moving contact assembly, and a permanent magnet is provided on the magnetic steel frame.

14. The resettable contactor according to claim 13, characterized in that, A metal wire mesh is provided on the outside of the displacement path of the moving contact assembly, and the permanent magnet blows the electric arc generated when the contact system opens and closes to the metal wire mesh to extinguish the arc.

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