Integrated arc extinguishing system structure

Abstract

The invention discloses an integrated arc extinguishing system structure, and relates to the technical field of direct current contactors, the integrated arc extinguishing system structure is composed of arc extinguishing chambers, a moving contact assembly and static contact assemblies, the two sides of the moving contact assembly are symmetrically connected with independent arc extinguishing chambers respectively, and the upper sides of the arc extinguishing chambers located on the two sides are correspondingly provided with the static contact assemblies respectively. Two sides of the movable contact assembly are provided with movable arc striking sheets, the static contact assembly is provided with static arc striking sheets, each independent arc extinguishing chamber is correspondingly provided with a movable arc striking sheet and a static arc striking sheet, and one side, close to the movable contact assembly, of each movable arc striking sheet and one side, close to the movable contact assembly, of each static arc striking sheet are correspondingly arranged. The arc extinguish chambers symmetrically arranged on the two sides of the moving contact assembly are the same in structure and have a good arc extinguish effect, and the contactor is small in size, high in operation load, relatively simple in arc extinguish structure and process manufacturing and low in cost.

Description

Technical Field

[0001] The invention relates to the technical field of direct current contactors, and in particular to an integrated arc extinguishing system structure. Background Art

[0002] High-voltage DC contactors are electrical control components that are mainly used in the field of new energy. For example, electric vehicles usually use high-voltage DC contactors to connect and disconnect the power battery system, and can disconnect the high-voltage battery system in the event of an accident. It is an "automatic switch" that uses a small current to control a large current operation. It plays the role of automatic regulation, safety protection, and circuit conversion in the electrical system. The arc is a discharge phenomenon caused by the gas between the contacts under the action of a strong electric field. This discharge phenomenon directly affects the working reliability of the contactor and may even cause accidents. Therefore, it is very necessary to set an arc extinguishing device for the contactor.

[0003] The contactors used in electric vehicles require small size and high operating load. At present, high-voltage DC contactors usually use ceramic seals and inert gas to extinguish arcs. One of the arc extinguishing methods used is to extend the metal phase arc laterally by sealing and filling an external magnetic field. The arc is cooled, compounded and deionized in the arc extinguishing medium. However, under the condition of small size, the arc extinguishing space is limited and the cooling gas filled is also limited. Since the cooling of the arc is completely dependent on the gas, the arc extinguishing capacity is limited and cannot meet the high voltage requirements of electric vehicles. In addition, this technical method requires the installation of multiple magnets, the manufacturing process is complex, and the production cost is high. The second arc extinguishing method commonly used by high-voltage DC contactors is to surround at least part of the moving path of the moving contact with a cooling ring to cool the arc. The number of arc extinguishing grids is small in a limited space, and it is impossible to achieve an upgrade to 1500VDC, let alone meet the 2500VDC energy storage DC high voltage requirements.

[0004] In addition, most of the existing air-type arc extinguishing chambers are placed in the product as a section of the product's arc extinguishing system. The arc striking structure of the front section and the exhaust structure of the rear section exist independently, and an arc extinguishing system with a single integrated module structure is not formed. Moreover, the arc extinguishing measures of the front and rear sections are not the same. Some have magnetic steel and some do not. The comprehensive smoothness of the arc extinguishing depends on the characteristics of the arc extinguishing structure of each section, and cannot be fully improved to meet the high efficiency requirements of arc extinguishing. Summary of the invention

[0005] Purpose of the invention: The technical problem to be solved by the present invention is to provide an integrated arc extinguishing system structure, which solves the problem that the existing vacuum arc extinguishing chamber has poor effect, high cost and cannot meet customer requirements.

[0006] Technical Solution

[0007] To solve the above problems, the technical solution provided by the present invention is:

[0008] An integrated arc extinguishing system structure, consisting of an arc extinguishing chamber, a moving contact assembly and a static contact assembly, wherein separate arc extinguishing chambers are symmetrically connected on both sides of the moving contact assembly, and static contact assemblies are correspondingly arranged on the upper sides of the arc extinguishing chambers on both sides, moving arc-striking pieces are arranged on both sides of the moving contact assembly, and static arc-striking pieces are arranged on the static contact assembly, and each separate arc extinguishing chamber corresponds to a moving arc-striking piece and a static arc-striking piece, and the moving arc-striking piece and the static arc-striking piece are arranged correspondingly on one side close to the moving contact assembly, and the arc extinguishing chambers symmetrically arranged on both sides of the moving contact assembly have the same structure, and the separate arc extinguishing chambers include an upper arc-striking cover and a lower arc-striking cover, and the upper arc-striking cover and the lower arc-striking cover are connected The arc isolation covers are symmetrical to each other and fixedly connected, and the internal structures of the upper arc isolation cover and the lower arc isolation cover are also symmetrically designed and have the same structure. Magnets are provided in the upper arc isolation cover and the lower arc isolation cover, and magnetic conductive sheets are provided on the outer surfaces of the upper arc isolation cover and the lower arc isolation cover. Arc extinguishing grids are fixedly provided between the upper arc isolation cover and the lower arc isolation cover, and a slit boosting window is provided on the side of the arc extinguishing grid in the upper arc isolation cover and the lower arc isolation cover away from the moving contact assembly, and the slit boosting window is connected to a curved arc discharge channel, and an arc isolation net is provided at the end of the curved arc discharge channel. The upper arc isolation cover and the lower arc isolation cover are also provided with a lower arc-starting sheet on the side of the arc extinguishing grid.

[0009] Furthermore, a moving contact is provided at one end of the moving arc-striking piece close to the moving contact assembly, and a static contact is provided at one end of the static arc-striking piece close to the moving contact assembly, the moving contact and the static contact are arranged correspondingly, the moving contact assembly includes a moving contact, the moving arc-striking piece is fixed on both sides of the moving contact, and the moving contact can move up and down to make the moving contact contact and separate from the static contact, and the end of the static arc-striking piece away from the static contact is located on the upper side of the arc extinguishing grid.

[0010] Furthermore, the lower arc-starting piece is a curved structure, a portion of the lower arc-starting piece is located at the bottom of the arc-extinguishing grid, and another portion of the lower arc-starting piece is led out from the portion located at the bottom of the arc-extinguishing grid and bent to the side of the arc-extinguishing grid facing the moving contact assembly.

[0011] Furthermore, the moving arc-striking piece is a curved structure, the portion of the moving arc-striking piece provided with the moving contact is installed at the end of the moving contact, and the curvature of another portion of the moving arc-striking piece is maintained on the side of the arc extinguishing grid facing the moving contact assembly.

[0012] Further, the movable arc-striking piece located on the side of the movable arc-striking piece facing the movable contact assembly corresponds to the lower arc-striking piece located on the side of the lower arc-striking piece facing the movable contact assembly.

[0013] Furthermore, the position of the magnetic steel in the upper arc isolation cover and the lower arc isolation cover is located on both sides of the corresponding positions of the moving contact of the moving arc-striking piece and the static contact of the static arc-striking piece.

[0014] Furthermore, the arc-extinguishing grid is composed of a plurality of individual grids evenly distributed in parallel up and down, and the individual grids distributed up and down are mirror-imaged, and arc-extinguishing grooves and arc-extinguishing holes are provided on the grid, and the arc-extinguishing grooves are triangular notches, and the arc-extinguishing holes extend into the grid along any side edge of both sides of the triangular notch of the arc-extinguishing groove.

[0015] Furthermore, the slotted pressurization window is a plurality of identical baffles arranged at intervals, gaps are provided between adjacent baffles, and the gaps between adjacent baffles are equal.

[0016] Furthermore, the curved arc discharge channel is a U-shaped channel, and is composed of an inner channel and an outer channel. A partition is provided between the inner channel and the outer channel, and a plurality of connecting ports are provided on the lower side of the partition. A protrusion is provided inside the outer channel, and the protrusion is a sloped protrusion, and the slope direction of the protrusion is gradually protruding along the gas flow direction.

[0017] Furthermore, the arc-isolating net is a single-layer or double-layer folded mesh with densely arranged holes.

[0018] Beneficial Effects

[0019] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0020] The technical solution provided by the present invention solves the problems of poor arc extinguishing ability, low current limiting ability and low switching voltage of ordinary high-voltage DC contactors. The air-type integrated arc extinguishing chamber system integrates arc striking, arc blowing, arc extinguishing, slit pressurization, arc discharge, arc blocking and exhaust, has a compact structure, can replace the inflatable arc extinguishing chamber, and achieves a good arc extinguishing effect; when the moving contact on the electromagnetic mechanism is disconnected and moves downward, the moving and static contacts generate an arc, and the arc is quickly and effectively extinguished with the combined functions of arc striking, arc blowing, arc extinguishing, arc discharge and arc blocking in the arc extinguishing chamber next to it, and zero arcing can be achieved, which meets the requirements of small size and high operating load of the contactor, and the arc extinguishing structure and process manufacturing are relatively simple and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of embodiment 1 of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of Embodiment 1 of the present invention;

[0023] Figure 3 This is a schematic plan view of the internal structure of Embodiment 1 of the present invention;

[0024] Figure 4 It is a schematic axonometric diagram of the structure of the arc extinguishing chamber of Example 1 of the present invention;

[0025] Figure 5 It is a schematic axonometric diagram of the rear structure of the arc extinguishing chamber of Example 1 of the present invention;

[0026] Figure 6 is a cross-sectional view of the arc extinguishing chamber of Embodiment 1 of the present invention;

[0027] Figure 7 Schematic diagram of odd-numbered layers of arc-extinguishing grids according to Embodiment 1 of the present invention;

[0028] Figure 8 Schematic diagram of odd and even layers of arc extinguishing grids in Example 1 of the present invention;

[0029] Fig. 9 Schematic diagram of arc motion trajectory of the arc extinguishing chamber of Embodiment 1 of the present invention;

[0030] Fig.10 A schematic diagram showing the arrangement of a single group of arc extinguishing chamber single-pole contactors provided in Embodiment 2 of the present invention;

[0031] Fig.11 A schematic diagram showing the arrangement of two groups of two-pole contactors in an arc extinguishing chamber provided in Embodiment 2 of the present invention;

[0032] Fig.12 A schematic diagram showing the arrangement of two groups of single-pole contactors in an arc extinguishing chamber provided in Embodiment 2 of the present invention;

[0033] Fig.13 for Fig.12 Schematic diagram of the structure. DETAILED DESCRIPTION

[0034] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Example 1

[0036] Combined with Figure 1-9 , an integrated arc extinguishing system structure, used for extinguishing the arc generated by the contactor during operation, and composed of an arc extinguishing chamber 00, a moving contact assembly 30 and a static contact assembly 40 with independent structures. The arc extinguishing chamber 00 cooperates with the moving contact assembly 30 and the static contact assembly 40 to complete the arc extinguishing work. The moving contact assembly 30 includes a moving contact 31. The arc extinguishing chamber 00 is arranged on both sides of the moving contact 11 on the moving contact assembly 30 in the form of an independent individual. The upper sides of the arc extinguishing chambers 00 on both sides of the moving contact assembly 30 are correspondingly provided with separate static contact assemblies 40, that is, the static contact assemblies 40 are also symmetrically arranged on both sides of the moving contact assembly 30.

[0037] The moving contact 31 of the moving contact assembly 00 is provided with moving arc-striking pieces 12 on both sides, and the static contact assembly 40 is provided with a static arc-striking piece 14 facing the arc extinguishing chamber 00. The moving arc-striking piece 12 is a curved structure, and one end of the moving arc-striking piece 12 is fixed to the two ends of the moving contact 11 on the moving contact assembly 30. The moving contact 121 is fixedly provided on the inner side of the moving arc-striking piece 12 at the two ends of the moving contact 11. The static contact assembly 40 is composed of a base 13 and a static arc-striking piece 14. The base 13 is a fixed structure. In conventional use, The static arc-striking piece 14 is fixed at the bottom of the base 13, and a static contact 141 is provided on one end of the static arc-striking piece 14 fixed on the base 13, close to the side of the moving contact assembly 30. The static contact 141 is arranged corresponding to the moving contact 121. During the use of the contactor, the moving contact 11 moves up and down. Therefore, the up and down movement of the moving contact 11 will cause the moving contact 121 of the moving arc-striking piece 12 to contact and separate with the static contact 141 of the static arc-striking piece 14, thereby generating an arc.

[0038] Each separate arc extinguishing chamber 00 located on both sides of the moving contact assembly 30 corresponds to a moving arc-striking piece 12 and a static arc-striking piece 14.

[0039] An arc extinguishing grid 7 is provided in the arc extinguishing chamber 00. The arc extinguishing grid 7 is a multi-layer composite structure. The arc extinguishing grid 7 is composed of a plurality of individual grids which are evenly distributed in parallel up and down. The moving arc-striking plate 12 is a curved structure. The moving arc-striking plate 12 is provided with a portion of a moving contact 121 which is installed at the end of the moving contact 11. The bending of the portion of the moving arc-striking plate 12 away from the moving contact 121 is maintained on the side of the arc extinguishing grid 7 facing the moving contact assembly 30 as an arc-striking angle. The portion of the static arc-striking plate 14 away from the static contact 141 is located on the upper side of the arc extinguishing grid 7 as an arc-striking angle.

[0040] A lower arc-starting piece 5 is also provided on the bottom side of the arc-extinguishing grid 7 in the arc-extinguishing chamber 00. The lower arc-starting piece 5 is also a curved structure. A part of the lower arc-starting piece 5 is located at the bottom of the arc-extinguishing grid 7, and another part of the lower arc-starting piece 5 is led out from the part located at the bottom of the arc-extinguishing grid 7 and bent to the side of the arc-extinguishing grid 7 facing the moving contact assembly 30. The part of the lower arc-starting piece 5 facing the moving contact assembly 30 serves as an arc-starting angle and faces the side of the arc-extinguishing grid 7 facing the moving contact assembly 30.

[0041] The moving arc-striking piece 12 located on the side of the moving arc-striking piece 12 facing the moving contact assembly 30 and the lower arc-striking piece 5 located on the side of the lower arc-striking piece 5 facing the moving contact assembly are arranged correspondingly, thereby achieving better arc-striking and arc-extinguishing effects.

[0042] The arc extinguishing chamber includes a lower arc shield 1 and an upper arc shield 9 which are completely symmetrically arranged. The lower arc shield 1 and the upper arc shield 9 constitute an arc extinguishing chamber. The components installed on the upper arc shield 9 and the lower arc shield 1 are exactly the same. The upper arc shield 9 and the lower arc shield 1 are arranged correspondingly. The upper arc shield 9 abuts against one side of the lower arc shield 1, and the other side is provided with an open opening. The open opening between the upper arc shield 9 and the lower arc shield 1 is the arc striking port of the arc extinguishing chamber.

[0043] The end where the upper arc shield 9 abuts against the lower arc shield 1 is the outer side, and the end where the upper arc shield 9 and the lower arc shield 1 are located at the arc striking port of the arc extinguishing chamber is the inner side.

[0044] An arc extinguishing grid 7 is fixedly provided between the lower arc shield 1 and the upper arc shield 9. The arc extinguishing grid 7 is a multi-layer structure. The arc extinguishing grid 7 is composed of a plurality of individual grids evenly distributed in parallel up and down. A certain gap is provided between adjacent grids and the distance is equal. The individual grids are divided into odd-numbered layers and even-numbered layers. An arc extinguishing groove 71 and an arc extinguishing through hole 72 are provided on a single grid. The arc extinguishing groove 71 is a triangular notch. The opening direction of the triangular notch of the arc extinguishing groove 71 is toward one end of the upper arc shield 9 and the lower arc shield 1, which is an open opening. The arc extinguishing through hole 72 extends into the grid along any side edge of the two sides of the triangular notch of the arc extinguishing groove 71. Adjacent The arc extinguishing through holes 72 on the grid extend inwardly from different sides of the arc extinguishing groove 71. The arc extinguishing through holes 72 of the alternating individual grids extend inwardly from different sides of the arc extinguishing groove 71 in the odd and even layers. The individual grids of the odd and even layers are staggered structures. The adjacent grids are mirror-imaged in the transverse axial direction of the grids. Multiple individual grids are arranged in an upper and lower arrangement between the upper arc isolation cover 9 and the lower arc isolation cover 1 in this manner, thereby forming an arc extinguishing grid 7. The end of the arc extinguishing grid 7 facing the opening of the upper arc isolation cover 9 and the lower arc isolation cover 1 is staggered, which is used to better separate the arcs generated by the electrical components, thereby achieving a better arc extinguishing effect.

[0045] The arc extinguishing grid 7 is preferably composed of 23 separate grids, which can effectively cut and cool the arc to achieve a rapid arc extinguishing effect.

[0046] In other embodiments, the arc extinguishing grids 7 are L-shaped or U-shaped and stacked around the arc.

[0047] Tenons for fixing are provided on both sides of each individual arc extinguishing grid 7, and tenons for the tenons are provided on the upper arc isolation cover 9 and the lower arc isolation cover 1. By inserting the tenons into the tenons, multiple individual grids are fixed in sequence between the upper arc isolation cover 9 and the lower arc isolation cover 1. In order to ensure the structural strength of the upper arc isolation cover 9 and the lower arc isolation cover 1, the tenon positions of each layer of the upper arc isolation cover 9 and the lower arc isolation cover 1 can be staggered, so that the tenons of the corresponding adjacent individual grids are also staggered, so that the upper arc isolation cover 9 and the lower arc isolation cover 1 and the arc extinguishing grid 7 can be fixed to each other as an integrated structure.

[0048] The upper arc isolation cover 9 and the lower arc isolation cover 1 are on the inner side of the arc extinguishing grid 7, and the first magnetic conductive sheet 6 and the second magnetic conductive sheet 3 are respectively provided on the outer surface of the upper arc isolation cover 9 and the lower arc isolation cover 1. The upper arc isolation cover 9 and the lower arc isolation cover 1 are provided with 7-shaped grooves for installing the first magnetic conductive sheet 6 and the second magnetic conductive sheet 3. The 7-shaped grooves on the upper arc isolation cover 9 and the lower arc isolation cover 1 are each installed with a 7-shaped magnetic conductive sheet, namely the first magnetic conductive sheet 6 and the second magnetic conductive sheet 3, to enhance the magnetic conductivity and arc blowing tendency of the arc extinguishing chamber; the shape of the first magnetic conductive sheet 6 and the second magnetic conductive sheet 3 is not limited to the 7-shaped shape, and can also be a rectangle, etc. The first magnetic conductive sheet 6 and the second magnetic conductive sheet 3 have a magnetic conductive function.

[0049] The upper arc isolation cover 9 and the lower arc isolation cover 1 located on the inner side of the first magnetic conductive sheet 6 and the second magnetic conductive sheet 3 are provided with the first magnetic steel 4 and the second magnetic steel 2 inside. The first magnetic steel 4 and the second magnetic steel 2 are used for magnetic blowing. The shapes of the first magnetic steel 4 and the second magnetic steel 2 are not limited to rectangles, but may also be elliptical, circular, etc.

[0050] The positions of the first magnetic steel 4 and the second magnetic steel 2 in the upper arc isolation cover 1 and the lower arc isolation cover 9 are located on both sides of the corresponding positions of the moving contact 121 of the moving arc-striking piece 12 and the static contact 141 of the static arc-striking piece 14 .

[0051] A slit pressurization window is provided between the upper arc isolation cover 9 and the lower arc isolation cover 1 on the outside of the arc extinguishing grid 7. The slit pressurization window is arranged at intervals between multiple identical baffles, and there are gaps between adjacent baffles. The gaps between adjacent baffles are equal. The gaps between the baffles are used to increase other pressures of the arc extinguishing grid 7, so that the gas has a higher flow rate. The heights of the multiple baffles are set corresponding to the arc extinguishing grids, so that the gas flowing out of the arc extinguishing grid 7 can be fully pressurized. Preferably, the baffles of the upper arc isolation cover 9 and the lower arc isolation cover 1 are provided with two groups of staggered square baffles, and slit windows are formed between the connected square baffles to form a narrow gas channel to achieve a pressurized arc extinguishing effect.

[0052] A curved arc discharge channel is provided on the outside of the slot pressurization window, and the curved arc discharge channel is a U-shaped channel. The curved arc discharge channel consists of an inner channel located on the inner side close to the slot pressurization window, and an outer channel on the side away from the slot pressurization window. A partition is provided between the inner channel and the outer channel, and only the lower side of the inner channel and the outer channel are connected. A connecting port for connecting the inner channel and the outer channel is provided on the lower side of the partition between the inner channel and the outer channel. There are multiple connecting ports, which are arranged from the lowest side of the partition between the inner channel and the outer channel upward. The multiple connecting ports are provided to facilitate the airflow in the inner channel to enter the outer channel smoothly. The upper side of the partition between the inner channel and the outer channel completely isolates the inner channel and the outer channel, thereby preventing the airflow entering the outer channel from flowing back into the inner channel from the upper side of the outer channel, thereby hindering the gas flow.

[0053] The inner channel of the curved arc discharge channel is at the same height as the slot pressurization window, so that the gas flowing out of the slot pressurization window can all enter the inner channel of the curved arc discharge channel. The upper side of the outer channel of the curved arc discharge channel is provided with an opening toward the outside of the upper arc isolation cover 9 and the lower arc isolation cover 1, and a protrusion is provided inside the outer channel of the curved arc discharge channel. The protrusion is a sloped protrusion, and the slope direction of the protrusion is gradually protruding along the gas flow direction.

[0054] The curved arc discharge channel not only controls the flow direction of the arc burning space, but also increases the high-temperature gas pressure in the arc extinguishing chamber, speeds up the transfer of the arc column to the arc extinguishing grid, and reduces the time of arc stagnation and entering the arc extinguishing grid.

[0055] An arc isolation net 8 is provided on the outer side of the upper arc isolation cover 9 and the lower arc isolation cover 1. The arc isolation net 8 corresponds to the opening of the outer channel of the curved arc discharge channel. All the gases flowing out from the opening of the curved arc discharge channel pass through the arc isolation net 8. The arc isolation net 8 is arranged in the middle of the ends of the upper arc isolation cover 9 and the lower arc isolation cover 1. The arc isolation net 8 is a single-layer or double-layer folded mesh with a dense arrangement. The arc isolation net 8 has the functions of arc isolation, arc blocking, and arc isolation mesh exhaust.

[0056] Preferably, three dense arc-isolating nets 8 are provided. In addition to serving as exhaust ports, each arc-isolating net 8 is made of two superimposed layers to block the residual arc light of the arc extinguishing system, ultimately achieving a zero arcing effect.

[0057] Several matching buckles are provided at the ends of the upper arc isolation cover 9 and the lower arc isolation cover 1 to assist in locking and fixing the upper arc isolation cover 9 and the lower arc isolation cover 1. Preferably, a buckle is provided at the upper, middle and lower ends of the upper arc isolation cover 9 and the lower arc isolation cover 1 to strengthen the overall bonding strength of the arc extinguishing chamber and prevent gas from scattering.

[0058] Due to the bending structure of the lower arc-striking piece 5 , the distance between the static arc-striking piece 14 and the lower arc-striking piece 5 gradually increases in the direction away from the static contact 141 , and expands in both the depth and width directions.

[0059] The static contact 141 and the moving contact 121 , the moving arc-striking piece 12 , and the static arc-striking piece 14 are all located on the upper side of the arc-extinguishing chamber, and are all located on one side of the arc-striking opening of the arc-extinguishing chamber.

[0060] A base 13 is fixed on the top of the upper arc isolation cover 9 and the lower arc isolation cover 1. The base 13 is flatly fixed on the upper side of the upper arc isolation cover 9 and the lower arc isolation cover 1. One end of a static arc-striking piece 14 is connected to the base 13, and the other end extends between the upper end top surface of the arc extinguishing grid 7 of the upper arc isolation cover 9 and the lower arc isolation cover 1 and the base 13. The function of the static arc-striking piece 14 is to guide the arc generated by it toward the arc extinguishing chamber at the moment when the moving contact 121 and the static contact 141 of the contactor are in contact and disconnected. The moving arc-striking piece 12 forms a physical arc-striking connection with the lower arc-striking piece 5 of the arc extinguishing chamber at the disconnection stop movement position, which is conducive to the effective entry of arc gas into the arc extinguishing chamber cavity for arc extinguishing of the arc extinguishing grid 7.

[0061] The upper arc shield 9 and the lower arc shield 1 of the arc extinguishing chamber are respectively provided with an arc blocking rib on the side of one side of the base 13, which is installed in the card slot of the base and is relatively sealed to prevent the arc gas from leaking from the side and increase the arc pressure.

[0062] The static arc-striking piece 14 and the lower arc-striking piece 5 on the arc-extinguishing chamber form a pair, which are respectively arranged at the upper and lower ends of the arc-striking opening of the arc-extinguishing chamber to effectively introduce the arc into the arc-extinguishing chamber.

[0063] Since the lower arc-striking piece 5 is arranged on the side of the arc extinguishing chamber away from the static contact 141, the head of the lower arc-striking piece 5 is bent and slender and extends a certain distance into the arc-striking port of the arc extinguishing chamber. It is used to connect the moving arc-striking piece 12 on the moving contact plate of the moving contact 121 and the lower arc-striking piece 5 when the moving contact 121 and the static contact 141 are disconnected, thereby accelerating the transmission of the arc to the lower side of the arc extinguishing chamber.

[0064] One magnetic pole of the first magnetic steel 4 and the second magnetic steel 2 inside the arc extinguishing chamber 00 points to one side of the moving and static contacts, and the other magnetic pole of the magnetic steel points to the other side of the moving and static contacts, and the direction of the magnetic pole is perpendicular to the direction of the current generated by the moving contact 121 and the static contact 141 when the two are in contact, which is used to introduce the arc into the arc extinguishing chamber.

[0065] The first magnetic steel 4 and the second magnetic steel 2 are placed in the upper and lower arc isolation covers of the arc extinguishing chamber in a pair of N and S poles, and the direction of the magnetic poles is perpendicular to the direction of the current generated between the moving and static contacts. Due to the action of the magnetic field force on the arc, the magnet can blow the arc into the arc extinguishing chamber for arc extinguishing. The first magnetic steel 4 and the second magnetic steel 2 are permanent magnets.

[0066] like Figure 7 The N poles of the first magnetic steel 4 and the second magnetic steel 2 of the arc extinguishing chambers on both sides of the moving contact 121 and the static contact 141 are placed perpendicular to the plane and face outward. According to the left-hand rule, the arc on the left side is accelerated by the magnetic field force to move toward the arc extinguishing chamber space on the left side, and the arc on the right side is accelerated by the magnetic field force to move toward the arc extinguishing chamber space on the right side until entering the arc extinguishing space on both sides. The arc in the arc extinguishing space is fully cut by the arc extinguishing grids arranged in a jigsaw pattern, thereby achieving arc extinguishing.

[0067] In addition, the first magnetic conductive sheet 6 and the second magnetic conductive sheet 3 embedded in the front section of the outer side of the upper arc isolation cover 9 and the lower arc isolation cover 1 strengthen the strength of the magnetic field and guide the arc to move toward the arc extinguishing chamber in the case of magnetic blowing relay.

[0068] Working principle of arc extinguishing chamber: The specific internal exhaust structure of the arc extinguishing chamber is as follows: During the disconnection procedure of the moving and static contacts, the arc gas is led to the arc extinguishing grid through the upper arc-striking grid, the moving arc-striking plate, and the lower arc-striking grid, and then passes through the slit pressurization window formed by the upper arc-isolating cover 9 and the lower arc-isolating cover 1, and then passes through the U-shaped maze exhaust duct. After the air flow turns, the hot gas is finally discharged through the three arc-isolating nets 8 to complete the arc extinguishing.

[0069] At the moment when the moving contact 121 and the static contact 141 are disconnected, the arc generated by the contactor under high voltage state can be effectively extinguished through the combined series of functions such as arc striking by the static arc striking piece 14 and the lower arc striking piece 5, arc blowing by the first magnetic steel 4 and the second magnetic steel 2, magnetic conduction by the first magnetic conductive piece 6 and the second magnetic conductive piece 3, arc extinguishing by the arc extinguishing grid 7, arc extinguishing by the curved arc discharge channel, arc blocking by the arc isolation net 8, etc. The arc extinguishing performance is high, the structure is compact, the volume is small, the cost is low, the manufacturing and assembly do not require complicated processes, and the higher voltage application requirements of the product can be met.

[0070] The arc extinguishing chamber accelerates the arc into the internal arc extinguishing space, cuts the arc through multiple arc extinguishing grids set in the arc extinguishing space, and then passes through multiple filters in the narrow channel to achieve the purpose of rapid arc extinguishing and zero arcing. The arc extinguishing chamber can quickly extinguish the arc in a smaller space, and the number of arc extinguishing grids is large, the arc extinguishing ability is strong, and it can achieve an upgrade to 1500VDC to meet customers' zero arcing needs.

[0071] The above arc extinguishing devices are modularly designed and can be switched between any two or four groups as needed. They can quickly extinguish arcs in a smaller space and have a strong arc extinguishing ability, meeting the requirements of small contactor volume range and achieving the best possible arc extinguishing effect.

[0072] In practical applications, one group of circuits includes at least two arc extinguishing chambers 00, and two groups of circuits include at least four arc extinguishing chambers 00, and the arc extinguishing chambers 00 are symmetrically arranged correspondingly.

[0073] In other embodiments, the exhaust system of the arc extinguishing chamber can be completely set at the rear end of the arc extinguishing chamber, including a slot booster window, a curved arc discharge channel, an arc isolation net, and a final exhaust port, and finally installed and integrated with the base 13, the upper arc isolation cover 9 and the lower arc isolation cover 1 to achieve a safe exhaust effect.

[0074] In other embodiments, the above technical solution can be changed to a solution of a traditional decentralized air-type arc extinguishing system, and each component is independent. Except for the arc extinguishing grid in the middle body, the components in the upper arc extinguishing cover 9 and the lower arc extinguishing cover 1 are separately placed and designed on the base for arc striking, arc blowing, magnetic conduction, arc discharge channel and arc extinguishing net, and are not connected to the arc extinguishing chamber body, and work independently to realize the arc extinguishing function.

[0075] In other embodiments, a simple arc extinguishing device: arc blowing, magnetic conduction and arc extinguishing grids are integrated through an arc extinguishing cover, arc initiation is placed in front, there is no arc discharge channel, and the air is directly exhausted to the outside of the shell through the rear arc isolation grid.

[0076] In other embodiments, the moving contact assembly is provided with a movable curved arc-striking plate or a curved movable arc-striking plate is symmetrically provided at both ends, and the starting point of the curved movable arc-striking plate is close to the contact point of the moving contact assembly, which is used to strike an arc toward the arc extinguishing chamber side.

[0077] In other embodiments, the static spring assembly is provided with a curved static arc-starting plate, the starting point of the curved static arc-starting plate is close to the static contact point of the static spring assembly, and is used to start an arc toward the arc extinguishing chamber side; a curved static arc-starting plate and an upper arc-starting grid can be separately provided, and a static curved arc-starting plate and an upper arc-starting grid can also be integrally formed.

[0078] Example 2

[0079] Regarding the application of the integrated arc extinguishing chamber device contactor in Example 1, in combination with the attached Figure 10-13 A schematic diagram showing several positions of an arc extinguishing chamber arranged in a contactor according to an embodiment of the present application;

[0080] in Fig.10 It is a schematic diagram of the arrangement position of a single group of arc extinguishing chamber one-pole contactors: the contactor comprises a group of two modular arc extinguishing chamber devices 15, which are symmetrically arranged on both sides of the electromagnetic mechanism 16;

[0081] Fig.11 A schematic diagram of the arrangement of two groups of arc extinguishing chamber two-pole contactors: the contactor includes two groups of four modular arc extinguishing chamber devices 15, which are symmetrically arranged on the front, back, left and right sides of the electromagnetic mechanism 17;

[0082] Fig.12 The schematic diagram of the arrangement of two groups of arc extinguishing chamber single pole contactors is as follows: the contactor includes two groups of four modular arc extinguishing chamber devices 15, two of which are symmetrically arranged on the front and rear left and right sides of the electromagnetic mechanism 17. Figure 5 The difference is that a connecting copper bar 18 is added to one end of the contactor to connect the two poles in series as one pole. Fig.13 It is a schematic diagram of the actual structure of a double-group arrangement position of a single-pole contactor in an arc extinguishing chamber.

[0083] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An integrated arc extinguishing system structure, characterized in that: It is composed of an arc extinguishing chamber, a moving contact assembly and a static contact assembly, wherein the moving contact assembly is symmetrically connected to separate arc extinguishing chambers on both sides, and the upper sides of the arc extinguishing chambers on both sides are respectively provided with static contact assemblies, and the moving contact assembly is provided with moving arc-striking pieces on both sides, and the static contact assembly is provided with a static arc-striking piece, and each separate arc extinguishing chamber corresponds to a moving arc-striking piece and a static arc-striking piece, and the moving arc-striking piece and the static arc-striking piece are correspondingly arranged on one side close to the moving contact assembly, and the arc extinguishing chambers symmetrically arranged on both sides of the moving contact assembly have the same structure, and the separate arc extinguishing chambers include an upper arc-striking cover and a lower arc-striking cover, and the upper arc-striking cover and the lower arc-striking cover are mutually connected. Symmetrically and fixedly connected, the internal structures of the upper arc isolation cover and the lower arc isolation cover are also symmetrically designed and have the same structure, magnetic steel is provided in the upper arc isolation cover and the lower arc isolation cover, and magnetic conductive sheets are provided on the outer surfaces of the upper arc isolation cover and the lower arc isolation cover, and arc extinguishing grids are fixedly provided between the upper arc isolation cover and the lower arc isolation cover, and a slit boosting window is provided on the side of the arc extinguishing grid in the upper arc isolation cover and the lower arc isolation cover away from the moving contact assembly, and the slit boosting window is connected to a curved arc discharge channel, and an arc isolation net is provided at the end of the curved arc discharge channel, and a lower arc-starting sheet is also provided on the side of the arc extinguishing grid on the upper arc isolation cover and the lower arc isolation cover.

2. An integrated arc extinguishing system structure according to claim 1, characterized in that: A moving contact is provided at one end of the moving arc-striking piece close to the moving contact assembly, and a static contact is provided at one end of the static arc-striking piece close to the moving contact assembly. The moving contact and the static contact are arranged correspondingly. The moving contact assembly includes a moving contact, and the moving arc-striking piece is fixed on both sides of the moving contact. The moving contact can make the moving contact contact and separate from the static contact by moving up and down. The end of the static arc-striking piece away from the static contact is located on the upper side of the arc extinguishing grid.

3. The integrated arc extinguishing system structure according to claim 2, characterized in that: The lower arc-starting piece is a curved structure, a part of which is located at the bottom of the arc-extinguishing grid, and another part of which is led out from the part located at the bottom of the arc-extinguishing grid and bent to the side of the arc-extinguishing grid facing the moving contact assembly.

4. The integrated arc extinguishing system structure according to claim 3, characterized in that: The movable arc-striking piece is a curved structure, the portion of the movable arc-striking piece provided with the movable contact is installed at the end of the movable contact, and the bend of the other portion of the movable arc-striking piece is maintained on the side of the arc-extinguishing grid facing the movable contact assembly.

5. The integrated arc extinguishing system structure according to claim 4, characterized in that: The movable arc-striking piece located on the side of the movable arc-striking piece facing the movable contact assembly corresponds to the lower arc-striking piece located on the side of the lower arc-striking piece facing the movable contact assembly.

6. The integrated arc extinguishing system structure according to claim 2, characterized in that: The position of the magnetic steel in the upper arc isolation cover and the lower arc isolation cover is located on both sides of the corresponding positions of the moving contact of the moving arc-striking piece and the static contact of the static arc-striking piece.

7. The integrated arc extinguishing system structure according to claim 1, characterized in that: The arc-extinguishing grid is composed of a plurality of individual grids evenly distributed in parallel up and down, and the individual grids distributed up and down are mirror-imaged, and arc-extinguishing grooves and arc-extinguishing through holes are provided on the grid, and the arc-extinguishing grooves are triangular notches, and the arc-extinguishing through holes extend into the grid along any one side edge of the two sides of the triangular notch of the arc-extinguishing groove.

8. The integrated arc extinguishing system structure according to claim 1, characterized in that: The slotted pressurization window is composed of a plurality of identical baffles arranged at intervals, gaps are provided between adjacent baffles, and the gaps between adjacent baffles are equal.

9. The integrated arc extinguishing system structure according to claim 1, characterized in that: The curved arc discharge channel is a U-shaped channel, and is composed of an inner channel and an outer channel. A partition is provided between the inner channel and the outer channel, and a plurality of connecting ports are provided on the lower side of the partition. A protrusion is provided inside the outer channel, and the protrusion is a sloped protrusion, and the slope direction of the protrusion is gradually protruding along the gas flow direction.

10. The integrated arc extinguishing system structure according to claim 1, characterized in that: The arc-isolating net is a single-layer or double-layer folded mesh with densely arranged meshes.

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