Integrated arc extinguishing system structure

Abstract

The utility model discloses an integrated arc extinguishing system structure, which relates to the technical field of direct current contactors and comprises arc extinguishing chambers, a moving contact assembly and static contact assemblies, the two sides of the moving contact assembly are respectively and symmetrically connected with independent arc extinguishing chambers, the upper sides of the arc extinguishing chambers on the two sides are respectively and correspondingly provided with the static contact assemblies, and the static contact assemblies are respectively and correspondingly connected with the moving contact assembly. 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 utility model relates to a direct current contactor technical field, concretely relates to a kind of integrated arc extinguishing system structure. BACKGROUND

[0002] High-voltage direct current contactor is a kind of electrical control element, mainly applied in new energy field, for example, electric vehicle usually adopts high-voltage direct current contactor to be responsible for the switching on and switching off of power battery system, and can be disconnected when accident occurs High-voltage battery system is a kind of "automatic switch" for operating with small current to control large current, which plays the role of automatic regulation, safety protection, conversion circuit in electrical system. Arc is the discharge phenomenon of gas between contacts under the action of strong electric field, which directly affects the working reliability of contactor, and even can cause accident, so it is very necessary to set arc extinguishing device for contactor.

[0003] The contactor applied to electric vehicle requires small size and high operating load, and the current high-voltage direct current contactor usually adopts ceramic sealing and inert gas filling to extinguish arc. One of the arc extinguishing means is to make the metal phase arc horizontally elongated by sealing and filling gas and adding magnetic field, and the arc is cooled and recombined in the arc extinguishing medium. However, under the condition of meeting the requirement of small size, the arc extinguishing space is limited, and the cooling gas filled is also limited. Since the cooling of arc completely depends on gas, the arc extinguishing capacity is limited, which cannot meet the requirements of high voltage such as electric vehicle. In addition, this technical means needs to set multiple magnets, and the manufacturing process is complex and the production cost is high. The second arc extinguishing means commonly used by high-voltage direct current contactor is to surround at least part of the movement path of the moving contact with a cooling ring to cool the arc. In the limited space, the number of arc extinguishing grids is small, which cannot realize the promotion to 1500VDC, and cannot meet the demand of 2500VDC energy storage direct current high voltage.

[0004] In addition, the existing air type arc extinguishing chamber is placed in the product as a section of the product arc extinguishing system, and the arc leading structure of the front section and the exhaust structure of the rear section exist independently without forming a single integrated module structure arc extinguishing system. Moreover, the arc extinguishing measures of the front and rear sections are not the same, some have magnetic steel and some do not, and the comprehensive fluency of arc extinguishing depends on the characteristics of each arc extinguishing structure, which cannot fully improve the efficiency of arc extinguishing. UTILITY MODEL CONTENTS

[0005] The utility model aims to solve the technical problem of providing an integrated arc extinguishing system structure, which solves the problems of poor effect, high cost and inability to meet customer requirements of the existing vacuum arc extinguishing chamber.

[0006] TECHNICAL SCHEME

[0007] To solve the above problems, the technical scheme provided by the utility model is:

[0008] The application discloses an integrated arc extinguishing system structure which is composed of arc extinguishing chambers, a moving contact assembly and a static contact assembly. The moving contact assembly is symmetrically connected with single arc extinguishing chambers on both sides, and the static contact assemblies are correspondingly arranged on the upper sides of the arc extinguishing chambers on both sides. The moving contact assembly is provided with moving arc starting sheets on both sides, and the static contact assembly is provided with a static arc starting sheet. Each single arc extinguishing chamber is correspondingly provided with a moving arc starting sheet and a static arc starting sheet. The moving arc starting sheet and the static arc starting sheet are correspondingly arranged on the side close to the moving contact assembly. The arc extinguishing chambers symmetrically arranged on both sides of the moving contact assembly are of the same structure. The single arc extinguishing chamber comprises an upper arc separation cover and a lower arc separation cover. The upper arc separation cover and the lower arc separation cover are symmetrically and fixedly connected. The internal structures of the upper arc separation cover and the lower arc separation cover are also symmetrically designed and have the same structure. The upper arc separation cover and the lower arc separation cover are both internally provided with magnetic steel. The outer surfaces of the upper arc separation cover and the lower arc separation cover are both provided with magnetic conductive sheets. The upper arc separation cover and the lower arc separation cover are fixedly provided with arc extinguishing grid sheets. The arc extinguishing grid sheets in the upper arc separation cover and the lower arc separation cover are provided with a gap pressurizing window on the side away from the moving contact assembly. The gap pressurizing window is connected with a curved arc discharge channel. The curved arc discharge channel is provided with an arc separation net at the end. The upper arc separation cover and the lower arc separation cover are both provided with a lower arc starting sheet on the side of the arc extinguishing grid sheet.

[0009] Further, the moving arc starting sheet is provided with a moving contact point at the end close to the moving contact assembly, the static arc starting sheet is provided with a static contact point at the end close to the moving contact assembly, the moving contact point and the static contact point are correspondingly arranged, the moving contact assembly comprises a moving contact, the moving arc starting sheet is fixed on both sides of the moving contact, the moving contact point and the static contact point can be contacted and separated by the up-down movement of the moving contact, and the end of the static arc starting sheet away from the static contact point is located on the upper side of the arc extinguishing grid sheet.

[0010] Further, the lower arc starting sheet is of a curved structure, a part of the lower arc starting sheet is located at the bottom of the arc extinguishing grid sheet, and the other part of the lower arc starting sheet is led out from the part at the bottom of the arc extinguishing grid sheet and curved to the side of the arc extinguishing grid sheet facing the moving contact assembly.

[0011] Further, the moving arc starting sheet is of a curved structure, the part of the moving arc starting sheet provided with the moving contact point is mounted at the end of the moving contact, and the other part of the moving arc starting sheet is curved to the side of the arc extinguishing grid sheet facing the moving contact assembly.

[0012] Further, the moving arc starting sheet located on the side of the moving contact assembly is corresponding to the lower arc starting sheet located on the side of the moving contact assembly.

[0013] Further, the position of the magnetic steel in the upper arc separation cover and the lower arc separation cover is located on both sides of the corresponding position of the moving contact of the moving arc blade and the static contact of the static arc blade.

[0014] Further, the arc-extinguishing grid piece is composed of a plurality of separate grid pieces uniformly distributed in parallel, the separate grid pieces are mirror-distributed between the upper and lower grid pieces, the grid piece is provided with an arc-extinguishing groove and an arc-extinguishing through hole, the arc-extinguishing groove is a triangular notch, and the arc-extinguishing through hole extends into the grid piece along any one side of the two sides of the triangular notch of the arc-extinguishing groove.

[0015] Further, the gap pressurization window is provided with a plurality of same baffle pieces, and gaps are arranged between adjacent baffle pieces.

[0016] Further, the curved arc discharge channel is a U-shaped channel, and the curved arc discharge channel is composed of an inner channel and an outer channel, a partition plate is arranged between the inner channel and the outer channel, a plurality of connecting openings are arranged on the lower side of the partition plate, a protrusion is arranged in the outer channel, the protrusion is a beveled protrusion, and the beveled direction of the protrusion is gradually protruding along the gas flow direction.

[0017] Further, the arc separation net is a single-layer or double-layer folded net hole arranged in a fine manner.

[0018] Beneficial effects

[0019] Compared with the prior art, the technical scheme has the following beneficial effects:

[0020] The air integrated arc-extinguishing chamber system integrates arc striking, arc blowing, arc extinguishing, gap pressurization, arc discharge and arc blocking, and has a compact structure, can replace the air-filled arc-extinguishing chamber, and achieves good arc-extinguishing effect; when the upper moving contact of the electromagnetic mechanism is disconnected and moves downward, the moving contact and the static contact generate an arc, the arc is struck in the arc-extinguishing chamber beside the arc, the arc is blown, the arc is extinguished, the arc is discharged, and the arc blocking series combination function is held to quickly and effectively extinguish the arc, zero arc flying can be achieved, the requirements of small volume and high operating load of the contactor are met, the arc-extinguishing structure and process manufacturing are relatively simple, and the cost is relatively low. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 FIG. 1 is a schematic view of the utility model embodiment 1;

[0022] Figure 2 FIG. 2 is a schematic view of the internal structure of the utility model embodiment 1;

[0023] Figure 3This is a schematic plan view of the internal structure of Example 1 of the present utility model;

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

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

[0026] Figure 6 This is a cross-sectional view of the arc extinguishing chamber of Example 1 of the present utility model;

[0027] Figure 7 This is a schematic diagram of the odd-numbered layers of the arc-quenching grid in Example 1 of the present utility model;

[0028] Figure 8 Schematic diagram of odd and even layers of arc-quenching grids in Example 1 of the present utility model;

[0029] Figure 9 This is a schematic diagram of the arc motion trajectory of the arc extinguishing chamber of Example 1 of the present utility model;

[0030] Figure 10 A schematic diagram showing the arrangement of a single-pole contactor group in an arc extinguishing chamber provided in Example 2 of the present utility model;

[0031] Figure 11 A schematic diagram showing the arrangement of two groups of two-pole contactors in an arc extinguishing chamber according to embodiment 2 of the present invention;

[0032] Figure 12 A schematic diagram showing the arrangement of two groups of single-pole contactors in an arc extinguishing chamber according to embodiment 2 of the present invention;

[0033] Figure 13 for Figure 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 attachment Figures 1-9The utility model provides an integrated arc extinguishing system structure for arc extinguishing of the arc generated in the operation of contactor, which is composed of an arc extinguishing chamber 00, a moving contact assembly 30 and a static contact assembly 40, 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 comprises a moving contact 31, the arc extinguishing chamber 00 is arranged on both sides of the moving contact 11 of the moving contact assembly 30 in the form of an independent individual, and a single static contact assembly 40 is arranged on the upper side of the arc extinguishing chamber 00 on both sides of the moving contact assembly 30, that is, the static contact assembly 40 is also symmetrically arranged on both sides of the moving contact assembly 30.

[0037] The moving contact assembly 00 is provided with a moving arc piece 12 on both sides of the moving contact 31, and the static contact assembly 40 is provided with a static arc piece 14 facing the arc extinguishing chamber 00, the moving arc piece 12 is a curved structure, one end of the moving arc piece 12 is fixed on both ends of the moving contact 11 of the moving contact assembly 30, a moving contact point 121 is fixed on the inner side of the moving arc piece 12 on both ends of the moving contact 11, the static contact assembly 40 is composed of a base 13 and the static arc piece 14, the base 13 is a fixed structure and cannot be moved in the conventional use mode, the static arc piece 14 is fixed on the bottom of the base 13, one end of the static arc piece 14 fixed on the base 13 is provided with a static contact point 141 close to one side of the moving contact assembly 30, the static contact point 141 is arranged correspondingly with the moving contact point 121, since the moving contact 11 moves up and down in the use process of the contactor, the up-and-down movement of the moving contact 11 will cause the moving contact point 121 of the moving arc piece 12 and the static contact point 141 of the static arc piece 14 to be in contact and separated, thereby generating an arc.

[0038] Each single arc extinguishing chamber 00 on both sides of the moving contact assembly 30 is correspondingly provided with a moving arc piece 12 and a static arc piece 14,

[0039] The arc extinguishing chamber 00 is provided with an arc extinguishing grid 7, the arc extinguishing grid 7 is a multilayer composite structure, the arc extinguishing grid 7 is composed of a plurality of single grids which are uniformly distributed in parallel, the moving arc piece 12 is a curved structure, the part of the moving arc piece 12 provided with the moving contact point 121 is installed on the end of the moving contact 11, the part of the moving arc piece 12 away from the moving contact point 121 is curved on the side of the arc extinguishing grid 7 as an arc angle facing the moving contact assembly 30, and the part of the static arc piece 14 away from the static contact point 141 is located on the upper side of the arc extinguishing grid 7 as an arc angle.

[0040] The bottom side of the arc extinguishing grid 7 in the arc extinguishing chamber 00 is further provided with a lower arc piece 5, the lower arc piece 5 is also a curved structure, one part of the lower arc piece 5 is located at the bottom of the arc extinguishing grid 7, and the other part of the lower arc piece 5 is led out from the part at the bottom of the arc extinguishing grid 7 and curved to the side of the arc extinguishing grid 7 facing the moving contact assembly 30, the part of the lower arc piece 5 facing the moving contact assembly 30 as an arc angle faces the side of the arc extinguishing grid 7 facing the moving contact assembly 30,

[0041] The dynamic arc blade 12 located on the side of the dynamic contact assembly 30 corresponds to the lower arc blade 5 located on the side of the dynamic contact assembly, so as to achieve better arc striking and arc extinguishing effects.

[0042] The arc extinguishing chamber comprises a lower arc separation cover 1 and an upper arc separation cover 9 which are completely symmetrically arranged and constitute the arc extinguishing chamber. The upper arc separation cover 9 is completely identical to the components mounted on the lower arc separation cover 1. The upper arc separation cover 9 and the lower arc separation cover 1 are correspondingly arranged, one side of the upper arc separation cover 9 abuts against the lower arc separation cover 1, and the other side is provided with an open type opening. The open type opening of the upper arc separation cover 9 and the lower arc separation cover 1 is the arc striking port of the arc extinguishing chamber.

[0043] The abutting end of the upper arc separation cover 9 and the lower arc separation cover 1 is the outer side, and the end of the upper arc separation cover 9 and the lower arc separation cover 1 located at the arc striking port of the arc extinguishing chamber is the inner side.

[0044] The arc extinguishing grid 7 is fixed between the lower arc separation cover 1 and the upper arc separation cover 9. The arc extinguishing grid 7 is a multi-layer structure. The arc extinguishing grid 7 is composed of a plurality of separate grid plates which are uniformly distributed in parallel. Adjacent grid plates are provided with a certain gap and the distance is equal. The separate grid plates are divided into odd layers and even layers. The single grid plate is provided with an arc extinguishing groove 71 and an arc extinguishing through hole 72. The arc extinguishing groove 71 is a triangular notch. The opening direction of the triangular notch of the arc extinguishing groove 71 is towards the open type opening end of the upper arc separation cover 9 and the lower arc separation cover 1. The arc extinguishing through hole 72 extends into the grid plate along any one side of the two sides of the triangular notch of the arc extinguishing groove 71. The arc extinguishing through holes 72 on adjacent grid plates extend inwardly from different sides of the arc extinguishing groove 71. The arc extinguishing through holes 72 on the alternately arranged separate grid plates extend inwardly from different sides of the arc extinguishing groove 71 in the odd layers and the even layers. The separate grid plates in the odd layers and the even layers are staggered structures. Adjacent grid plates are arranged in mirror image in the transverse axis direction of the grid plate. A plurality of separate grid plates are arranged and installed in the upper arc separation cover 9 and the lower arc separation cover 1 in this way to form the arc extinguishing grid 7. The end of the arc extinguishing grid 7 towards the opening of the upper arc separation cover 9 and the lower arc separation cover 1 is staggered designed, which is used for better separating the arc generated by the electrical components, so as to achieve better arc extinguishing effect.

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

[0046] In other embodiments, the arc extinguishing grid 7 is L-shaped or U-shaped around the arc.

[0047] The both sides of each single arc-extinguishing grid piece 7 are provided with tenons for fixation, and the upper arc-shield 9 and the lower arc-shield 1 are provided with mortises corresponding to the tenons, so that the plurality of single grid pieces are fixed between the upper arc-shield 9 and the lower arc-shield 1 by inserting the tenons into the mortises. In order to ensure the structural strength of the upper arc-shield 9 and the lower arc-shield 1, the positions of the mortises of each layer of the upper arc-shield 9 and the lower arc-shield 1 are arranged in a staggered manner, so that the tenons of the corresponding adjacent single grid pieces are also arranged in a staggered manner, thereby fixing the upper arc-shield 9, the lower arc-shield 1 and the arc-extinguishing grid piece 7 into an integral structure.

[0048] The upper arc-shield 9 and the lower arc-shield 1 are located on the inner side of the arc-extinguishing grid piece 7, and are respectively provided with a first magnetic guide piece 6 and a second magnetic guide piece 3 on the outer side surfaces thereof. The upper arc-shield 9 and the lower arc-shield 1 are provided with 7-shaped grooves for mounting the first magnetic guide piece 6 and the second magnetic guide piece 3. The upper arc-shield 9 and the lower arc-shield 1 are respectively provided with a 7-shaped magnetic guide piece, i.e. the first magnetic guide piece 6 and the second magnetic guide piece 3, thereby enhancing the arc-blowing tendency of the arc-extinguishing chamber. The shapes of the first magnetic guide piece 6 and the second magnetic guide piece 3 are not limited to 7-shaped, and can also be rectangular and the like. The first magnetic guide piece 6 and the second magnetic guide piece 3 have a magnetic guide function.

[0049] The upper arc-shield 9 and the lower arc-shield 1 located on the inner side of the first magnetic guide piece 6 and the second magnetic guide piece 3 are provided with a first magnetic steel 4 and a second magnetic steel 2. 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 rectangular, and can also be oval, circular and the like.

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

[0051] A gap pressurization window is arranged between the upper arc-shield 9 and the lower arc-shield 1 on the outer side of the arc-extinguishing grid piece 7. The gap pressurization window is arranged in a plurality of same blocking pieces in a spaced manner. The adjacent blocking pieces are provided with gaps. The gaps between the adjacent blocking pieces are equal. The gaps between the blocking pieces are used for increasing the pressure of the arc-extinguishing grid piece 7, so that the gas has a higher flow rate. The heights of the plurality of blocking pieces correspond to the arc-extinguishing grid piece, thereby achieving the effect of fully pressurizing the gas flowing out from the arc-extinguishing grid piece 7. Preferably, the upper arc-shield 9 and the lower arc-shield 1 are provided with two groups of square baffles combined in a staggered manner. The adjacent square baffles form a narrow window to form a gas channel, thereby achieving the effect of pressurization and arc-extinguishing.

[0052] The curved arc discharge channel is a U-shaped channel, which is composed of an inner channel located on one side of the pinch pressurized window and an outer channel located on the other side of the pinch pressurized window. A partition is arranged between the inner channel and the outer channel. The inner channel and the outer channel are only connected at the lower side. The lower side of the partition between the inner channel and the outer channel is provided with a plurality of connecting ports for connecting the inner channel and the outer channel. The connecting ports are arranged from the lowermost side of the partition between the inner channel and the outer channel upwards. The plurality of connecting ports facilitate the smooth entry of the gas flow in the inner channel into the outer channel. The upper side of the partition between the inner channel and the outer channel completely isolates the inner channel and the outer channel, preventing the gas flow 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 pinch pressurized window, so that the gas flowing out of the pinch pressurized window can 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 towards the outer side of the upper arc shield 9 and the lower arc shield 1. The inner side of the outer channel of the curved arc discharge channel is provided with a protrusion, which is a slope protrusion. The slope direction of the protrusion gradually protrudes along the gas flow direction.

[0054] The curved arc discharge channel not only controls the flow direction of the arc space, but also can increase the pressure of the high-temperature gas in the arc-extinguishing chamber, accelerate the transfer speed of the arc column to the arc-extinguishing grid, and reduce the arc stagnation and the time of entering the arc-extinguishing grid.

[0055] The outer side of the upper arc shield 9 and the lower arc shield 1 is provided with an arc separation net 8, which corresponds to the opening of the outer channel of the curved arc discharge channel. The gas flowing out of the opening of the curved arc discharge channel passes through the arc separation net 8. The arc separation net 8 is arranged at the middle of the end of the upper arc shield 9 and the lower arc shield 1. The arc separation net 8 is a single-layer or double-layer folded net with fine mesh arrangement. The arc separation net 8 has the functions of arc separation, arc blocking, and arc hole exhaust.

[0056] Preferably, three close arc separation nets 8 are arranged. In addition to serving as exhaust ports, each arc separation net 8 is made by stacking two layers, which is used to block residual arc light of the arc-extinguishing system, and finally achieves the effect of zero flying arc.

[0057] The end of the upper arc shield 9 and the lower arc shield 1 is provided with a plurality of matched buckles to assist the locking and fixing of the upper arc shield 9 and the lower arc shield 1. Preferably, one buckle is arranged on the upper, middle and lower of the end of the upper arc shield 9 and the lower arc shield 1, which is used to strengthen the overall bonding strength of the arc-extinguishing chamber and prevent the gas from scattering.

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

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

[0060] The top of the upper arc shield 9 and the lower arc shield 1 is fixed with a base 13, which is fixed on the upper side of the upper arc shield 9 and the lower arc shield 1. One end of the static arc guide 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 shield 9 and the lower arc shield 1 and the base 13. The static arc guide piece 14 functions to guide the arc generated at the moment of contact and disconnection of the moving contact 121 and the static contact 141 to the direction of the arc extinguishing chamber. The moving arc guide piece 12 and the lower arc guide piece 5 of the arc extinguishing chamber form a physical arc guide connection at the disconnection stop motion position, which is beneficial to the effective entry of arc gas into the arc extinguishing chamber cavity for arc extinguishing by the arc extinguishing grid 7.

[0061] The upper arc shield 9 and the lower arc shield 1 of the arc extinguishing chamber are provided with an arc blocking rib on one side of the side surface of the base 13, which is installed in the clamping groove of the base and is relatively sealed, so as to block the leakage of arc gas from the side surface and improve the arc gas pressure.

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

[0063] The lower arc guide piece 5 is arranged on the side of the arc extinguishing chamber away from the static contact 141, and the head of the lower arc guide piece 5 is bent and elongated to extend a certain distance into the arc guide opening of the arc extinguishing chamber, which is used to connect the moving arc guide piece 12 on the moving contact plate of the moving contact 121 and the lower arc guide piece 5 when the moving contact 121 and the static contact 141 are disconnected, so as to accelerate the transmission of the arc to the inside of 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 points to one side of the moving and static contacts, and the other magnetic pole 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 when the moving contact 121 and the static contact 141 are in contact, which is used to guide the arc into the arc extinguishing chamber.

[0065] The first magnetic steel 4 and the second magnetic steel 2 are arranged on the upper and lower arc shields of the arc extinguishing chamber in N-S pole pairs, and the direction of the magnetic pole is perpendicular to the direction of the current generated between the moving and static contacts. Since the arc is affected by the magnetic field force, 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] As Figure 7, the N-pole setting direction of the first magnetic steel 4 and the second magnetic steel 2 on both sides of the arc-extinguishing chamber of the moving contact 121 and the stationary contact 141 is perpendicular to the plane and outward, according to the left-hand rule, the electric arc on the left side is accelerated to move toward the left arc-extinguishing chamber space under the action of the magnetic field force, and the electric arc on the right side is accelerated to move toward the right arc-extinguishing chamber space under the action of the magnetic field force; until entering the arc-extinguishing spaces on both sides. The electric arc in the arc-extinguishing spaces is fully cut by the arc-extinguishing grid with the interlocking mouth shape, so that the arc extinguishing is realized.

[0067] In addition, the first magnetic guide sheet 6 and the second magnetic guide sheet 3 inlaid on the front segment of the outer side of the upper arc separation cover 9 and the lower arc separation cover 1 strengthen the strength of the magnetic field and guide the electric arc to move to the arc-extinguishing chamber under the action of the magnetic blowing force.

[0068] The working principle of the arc-extinguishing chamber is as follows: in the opening and closing procedure of the moving contact 121 and the stationary contact 141, the arc gas is introduced to the arc-extinguishing grid through the upper arc introduction grid sheet, the moving arc introduction plate, the lower arc introduction grid sheet, then passes through the narrow slit pressure window formed by the upper arc separation cover 9 and the lower arc separation cover 1, and then passes through the U-shaped labyrinth exhaust passage, finally passes through the three arc separation nets 8 after the airflow is turned, and the hot gas is exhausted, and the arc extinguishing is completed.

[0069] At the moment of the opening and closing of the moving contact 121 and the stationary contact 141, the electric arc generated by the contactor under the high-voltage state can be effectively extinguished by the combined series functions of the arc introduction of the stationary arc introduction sheet 14 and the lower arc introduction sheet 5, the arc blowing of the first magnetic steel 4 and the second magnetic steel 2, the magnetic guidance of the first magnetic guide sheet 6 and the second magnetic guide sheet 3, the arc extinguishing of the arc-extinguishing grid 7, the arc discharge of the curved arc discharge channel, and the arc blocking of the arc separation net 8. The arc-extinguishing chamber has high arc-extinguishing performance, compact structure, small volume, low cost, and does not need complex manufacturing and assembly processes, and can meet the higher voltage application requirements of the product.

[0070] The arc-extinguishing chamber accelerates the electric arc to enter the internal arc-extinguishing space, cuts the electric arc by the multiple arc-extinguishing grids arranged in the arc-extinguishing space, then passes through the multiple filter nets in the narrow channel, so as to achieve the purpose of fast arc extinguishing and zero arc flying. The arc-extinguishing chamber can quickly extinguish the arc in a small space, and has multiple arc-extinguishing grids, strong arc-extinguishing capacity, and can realize the improvement to 1500VDC, and meet the zero arc flying requirements of the customer.

[0071] The above arc-extinguishing device is modularized and designed, and can be switched by any two groups or four groups as needed, can quickly extinguish the arc in a small space, has strong arc-extinguishing capacity, and meets the excellent arc-extinguishing effect of the contactor with small volume.

[0072] In actual application, one group of circuits includes at least two arc-extinguishing chambers 00, two groups of circuits include at least four arc-extinguishing chambers 00, and the arc-extinguishing chambers 00 are respectively and symmetrically arranged.

[0073] In other embodiments, the exhaust system of the arc extinguishing chamber can be completely arranged at the rear end of the arc extinguishing chamber, including the pinch pressurizing window, the curved arc discharge channel, the arc separation net, and the final exhaust port, which is finally integrated with the base 13, the upper arc separation cover 9 and the lower arc separation cover 1 to achieve a safe exhaust effect.

[0074] In other embodiments, the above technical solution can be changed to the scheme of a traditional dispersed air arc extinguishing system. The components are independent, and the components in the upper arc separation cover 9 and the lower arc separation cover 1 are removed from the intermediate main arc extinguishing grid, and the related components of the arc striking, arc blowing, magnetic guiding, arc discharge channel and arc separation net are independently arranged and designed on the base, and are not connected with the main body of the arc extinguishing chamber, and work independently to realize the arc extinguishing function.

[0075] In other embodiments, a simple arc extinguishing device: the arc blowing, magnetic guiding and arc extinguishing grid are integrated through the arc cover, the arc striking is front-mounted, there is no arc discharge channel, and the exhaust is directly discharged to the outside of the shell through the rear-mounted arc separation grid.

[0076] In other embodiments, the moving contact assembly is provided with one curved moving arc striking plate or one curved moving arc striking plate symmetrically arranged at each end, and the starting point of the curved moving arc striking plate is close to the contact point of the moving contact assembly, which is used for striking arc to the side of the arc extinguishing chamber.

[0077] In other embodiments, the static spring assembly is provided with one curved static arc striking plate, and the starting point of the curved static arc striking plate is close to the static contact point of the static spring assembly, which is used for striking arc to the side of the arc extinguishing chamber; one curved static arc striking plate and the upper arc striking grid can be separately arranged, and one static curved arc striking plate and the upper arc striking grid can also be integrally formed.

[0078] Example 2

[0079] Regarding the application of the integrated arc extinguishing chamber device contactor in Example 1, the attached drawings are combined Figures 10-13 A schematic diagram of several positions of an arc extinguishing chamber for a contactor is provided for the embodiments of the present application;

[0080] Among them Figure 10 A schematic diagram of the arrangement position of a single group of one-pole contactors of an arc extinguishing chamber: the contactor includes one group of two modular arc extinguishing chamber devices 15, which are symmetrically arranged on both sides of the electromagnetic mechanism 16;

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

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

[0083] The above-described embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the present application. It should be pointed out that, for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. An integrated arc quenching system structure, characterized by, The arc-extinguishing chamber, the moving contact assembly and the static contact assembly, the moving contact assembly is symmetrically connected with a single arc-extinguishing chamber on both sides, the static contact assembly is correspondingly arranged on the upper side of the arc-extinguishing chamber on both sides, the moving contact assembly is provided with a moving arc-starting sheet on both sides, the static contact assembly is provided with a static arc-starting sheet, each single arc-extinguishing chamber is correspondingly provided with a moving arc-starting sheet and a static arc-starting sheet, the moving arc-starting sheet and the static arc-starting sheet are correspondingly arranged on the side close to the moving contact assembly, the arc-extinguishing chambers symmetrically arranged on both sides of the moving contact assembly are of the same structure, the single arc-extinguishing chamber comprises an upper arc-shielding cover and a lower arc-shielding cover, the upper arc-shielding cover and the lower arc-shielding cover are symmetrically and fixedly connected, the internal structures of the upper arc-shielding cover and the lower arc-shielding cover are also symmetrically designed and of the same structure, the upper arc-shielding cover and the lower arc-shielding cover are both provided with a magnetic steel, the outer surfaces of the upper arc-shielding cover and the lower arc-shielding cover are both provided with a magnetic conducting sheet, the upper arc-shielding cover and the lower arc-shielding cover are both fixedly provided with an arc-extinguishing grid sheet, the arc-extinguishing grid sheet in the upper arc-shielding cover and the lower arc-shielding cover is provided with a gap pressurizing window on the side away from the moving contact assembly, the gap pressurizing window is communicated with a curved arc-discharging channel, the curved arc-discharging channel is provided with an arc-shielding net at the end, and the upper arc-shielding cover and the lower arc-shielding cover are both provided with a lower arc-starting sheet on the side of the arc-extinguishing grid sheet.

2. An integrated arc quenching system structure according to claim 1, characterized in that, The moving arc-starting sheet is provided with a moving contact point at the end close to the moving contact assembly, the static arc-starting sheet is provided with a static contact point at the end close to the moving contact assembly, the moving contact point and the static contact point are correspondingly arranged, the moving contact assembly comprises a moving contact, the moving arc-starting sheet is fixed on both sides of the moving contact, the moving contact point and the static contact point can be contacted and separated by the up-down movement of the moving contact, and the end of the static arc-starting sheet away from the static contact point is located on the upper side of the arc-extinguishing grid sheet.

3. An integrated arc quenching system structure according to claim 2, wherein The lower arc-starting sheet is of a curved structure, a part of the lower arc-starting sheet is located at the bottom of the arc-extinguishing grid sheet, and the other part of the lower arc-starting sheet is led out from the part at the bottom of the arc-extinguishing grid sheet and curved to the side of the arc-extinguishing grid sheet facing the moving contact assembly.

4. An integrated arc quenching system structure according to claim 3, wherein The moving arc-starting sheet is of a curved structure, the part of the moving arc-starting sheet provided with the moving contact point is mounted at the end of the moving contact, and the other part of the moving arc-starting sheet is curved to the side of the arc-extinguishing grid sheet facing the moving contact assembly.

5. An integrated arc quenching system structure according to claim 4, wherein The moving arc-starting sheet located on the side of the moving arc-starting sheet facing the moving contact assembly corresponds to the lower arc-starting sheet located on the side of the lower arc-starting sheet facing the moving contact assembly.

6. The integrated arc extinguishing system structure of claim 2, wherein The positions of the magnetic steels in the upper arc-shielding cover and the lower arc-shielding cover are located on both sides of the corresponding positions of the moving contact point of the moving arc-starting sheet and the static contact point of the static arc-starting sheet.

7. The integrated arc extinguishing system structure of claim 1, wherein The arc-extinguishing grid sheet is composed of a plurality of single grid sheets which are uniformly distributed in parallel, the single grid sheets are mirror-distributed, the grid sheet is provided with an arc-extinguishing groove and an arc-extinguishing through hole, the arc-extinguishing groove is a triangular notch, and the arc-extinguishing through hole extends into the grid sheet along any one side of the two sides of the triangular notch of the arc-extinguishing groove.

8. The integrated arc extinguishing system structure of claim 1, wherein, The slit pressurization window is arranged with multiple same baffles, and gaps are arranged between adjacent baffles.

9. The integrated arc extinguishing system structure of claim 1, wherein, The curved arc discharge channel is a U-shaped channel, and the curved arc discharge channel is composed of an inner channel and an outer channel. A partition plate is arranged between the inner channel and the outer channel. A plurality of connecting ports are arranged on the lower side of the partition plate. A protrusion is arranged in the outer channel. The protrusion is a beveled protrusion, and the bevel direction of the protrusion is gradually protruding along the gas flow direction.

10. The integrated arc extinguishing system structure of claim 1, wherein, The arc separation net is a single-layer or double-layer folded net with fine arrangement.

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