Circuit breaker arc extinguishing chamber, arc separating plate and arc separating seat

Abstract

The present invention provides an arc extinguishing chamber for a circuit breaker, belonging to the field of circuit breakers. It includes arc separating plates and two oppositely arranged arc separating seats. At least two arc guiding synapses are spaced apart at one end of the arc separating plate corresponding to the contact. The arc separating seats are provided with adjustment installation grooves for installing the arc separating plates, and the shapes of two adjacent adjustment installation grooves are different, so that the arc guiding synapses of the arc separating plate have different orientations after assembly or the arc guiding synapses of the arc separating plate and the adjacent arc separating plates are staggered with each other after assembly. The present invention enables the same type of arc separating plates assembled on the arc separating seats to be adaptively adjusted according to the shape differences of different adjustment installation grooves on the arc separating seats, so that the orientations of the arc guiding synapses thereon are different or the orientations of the arc guiding synapses are staggered, without the need to distinguish the front and reverse assembly of the arc separating plates, greatly reducing the assembly difficulty of the arc separating plates and making them convenient for assembly and use.

Description

Technical Field

[0001] The present invention relates to the field of circuit breakers, and particularly to an arc extinguishing chamber, an arc separating sheet and an arc separating seat of a circuit breaker. Background Art

[0002] During the operation of a circuit breaker when breaking a load, the voltage between the contacts causes air dielectric discharge to form an arc. Therefore, in switches such as circuit breakers and contactors, an arc extinguishing chamber is usually provided to extinguish the arc.

[0003] The structure of the current mainstream arc extinguishing chamber is like that of a universal circuit breaker arc extinguishing chamber with Chinese patent number CN201020607800.7. At one end of the arc extinguishing grid corresponding to the moving contact, there is an arc guiding angle in the shape of "V". The arc guiding angles at the arc extinguishing grids (1) adjacent to each other are staggered in a concave-convex manner to form a labyrinth structure. This universal circuit breaker arc extinguishing chamber adopts the arc extinguishing grid with a labyrinth structure and is equipped with an arc baffle, so that the arc can be quickly stretched, cooled and extinguished, and has a high breaking capacity.

[0004] However, the existing mainstream arc extinguishing chamber structure has the following problems: 1. When installing the arc extinguishing grids, they need to be installed one positive and one negative, which objectively causes inconvenience in installation. 2. The contour of the front edge of the arc extinguishing grid corresponding to the moving contact is set as a symmetric "V-shaped" or "U-shaped". In actual use, the arc extinguishing effect on the front side is not ideal.

[0005] Based on this, the application of this case is proposed. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the present invention provides an arc extinguishing chamber of a circuit breaker that is convenient to install, and at the same time improves the arc extinguishing effect of the arc extinguishing chamber, and solves the problems of inconvenient installation caused by the need to install the arc extinguishing grids one positive and one negative in the prior art and the unsatisfactory arc extinguishing effect of the arc extinguishing grids caused thereby.

[0007] To achieve the above object, the arc extinguishing chamber of the circuit breaker of the present invention includes an arc separating sheet, two relatively arranged arc separating seats, a flame extinguishing sheet and a cover. It is characterized in that at least two arc guiding synapses are arranged at intervals at one end of the arc separating sheet corresponding to the contact. An adjustment installation groove for installing the arc separating sheet is provided on the arc separating seat. The adjustment installation groove is adapted to the shape of the part of the arc separating sheet installed thereon. The structures of two adjacent adjustment installation grooves are different. After assembly, the arc guiding synapses on two adjacent arc separating sheets have different orientations or the arc guiding synapses of the arc separating sheet after assembly are staggered with those of the adjacent arc separating sheet.

[0008] The above structure, where "the shape of the position-adjusting installation groove is adapted to the shape of the arc separating piece", includes at least the following aspects: First, the width of the position-adjusting installation groove is adapted to the thickness of the arc separating piece. Through this width fit, the arc separating piece can be stably inserted above the position-adjusting installation groove after being embedded in the position-adjusting installation groove. Second, the shape of the bottom of the position-adjusting installation groove is adapted to the shape of the arc separating piece, so that the arc separating piece can be embedded therein and cooperate with the bottom of the groove, and the arc guiding synapses on adjacent arc separating pieces are staggered according to the specific structure of the bottom of the groove.

[0009] In the above structure, where "the shapes of the two position-adjusting installation grooves are different", it means that the shapes of the two position-adjusting installation grooves are adapted to the same arc separating piece. This adaptation difference is caused by the cooperation of the position-adjusting installation grooves with different positions on the arc separating piece. Such adjustment can be regarded as a certain deviation or fine adjustment in terms of position, height, angle, etc. of the arc separating piece after assembly.

[0010] The shape of the bottom of the adjacent position-adjusting installation grooves in the above structure is adapted to the arc but also has differences. When the arc separating piece is completely embedded in the corresponding position-adjusting installation groove, its whole body will adaptively adjust its position and angle, so that the arc guiding synapses on adjacent arc separating pieces are staggered through different height or angle offsets, thereby improving the arc guiding effect and sectioning ability of the arc separating piece and the arc extinguishing effect of the arc extinguishing chamber. Since the present invention realizes the staggered arrangement of the arc guiding synapses by using the differential structure of the bottom of the groove, in the present invention, the installation of the arc separating piece does not need to distinguish between the front and the back. During installation, the arc separating pieces are uniformly installed, and the arc separating piece will adaptively adjust its own position and angle according to the shape of the corresponding position-adjusting installation groove, without individually adjusting the installation position or installation direction of each arc separating piece one by one. The above passive adjustment makes the installation of the arc separating piece extremely simple and easy to implement, which can not only effectively improve the manual assembly efficiency, but also be suitable for automated installation using corresponding mechanical settings.

[0011] To improve the fit between the arc separating piece and the arc separating groove, the present invention is further provided as follows: The parts of adjacent arc separating pieces that are cooperatively installed with the position-adjusting installation grooves are arranged in a staggered manner. When the side structures of the arc separating pieces are the same, the contacts on the arc separating pieces can also be misaligned, but relative sliding or relative rotation is likely to occur between the arc separating piece and the installation groove. Through the above structural design, different parts on any side of the arc separating piece are cooperatively installed with the position-adjusting installation groove. Using this cooperative installation relationship can effectively ensure the assembly stability between the arc separating piece and the position-adjusting installation groove, and improve the durability and service performance of the structure of the present invention.

[0012] As a preferred embodiment, the arc guiding synapses on the adjacent arc separating sheets are distributed on the circumference of a virtual circle. The arc guiding synapses are fan-shaped distributed, which can effectively expand the arc guiding range, improve the arc guiding effect and accelerate the arc extinguishing efficiency while maintaining the same volume of the arc separating sheets and the arc extinguishing chamber. Especially in the present invention, for the arc separating sheet body structure with little change, the arc guiding synapses can also be fan-shaped distributed only by adjusting the position mounting grooves.

[0013] The present invention is further provided as follows: the bottom of the position adjusting mounting groove includes a supporting surface formed by sequentially connecting at least two short planes distributed along the length direction of the position adjusting mounting groove, and a fixed angle is formed between two adjacent short planes; the difference is that the angles and / or positions of the fixed angles of the supporting surfaces on two adjacent position adjusting mounting grooves are different; one end of the arc separating sheet corresponding to the position adjusting mounting groove has at least two side edges respectively corresponding to the supporting surface, and the angle between the side edges is the same as the fixed angle between the two corresponding short planes.

[0014] Through the above structure, the relative angle of two adjacent position adjusting mounting grooves can be adjusted during design or the relative angle and relative position of the two position adjusting mounting grooves can be controlled to realize the adjustment of the orientation of the arc guiding synapses on the arc separating sheet assembled therein, so that the arc guiding synapses on the adjacent arc separating sheets are staggered with each other or the depth of the arc guiding synapses is adjusted, so that the arc guiding synapses can be adjusted in terms of angle and depth.

[0015] As a preference, the present invention is further provided as follows: the supporting surface is divided into three categories: a reference position, a clockwise offset and a counterclockwise offset with the reference position as the reference.

[0016] The present invention is further provided as follows: the supporting surface is formed by sequentially connecting three short planes, and one end of the arc separating sheet corresponding to the arc separating seat has four side edges cooperating with the supporting surface. Compared with only using two short planes and two side edges for cooperation, this structure can not only realize a larger adjustment range of the arc guiding synapses in the circumferential direction and make the arc guiding synapses fill the internal space of the arc extinguishing chamber as much as possible and to the greatest extent, so as to improve the arc extinguishing effect of the arc extinguishing chamber. Moreover, the cooperation of three short planes and three side edges forms a triangular fixation for the arc separating sheet, which is equivalent to "holding" the arc separating sheet to further stably fix the arc separating sheet inclinedly assembled on the position adjusting mounting groove, ensuring the stability and reliability of the assembly of the arc separating sheet on the position adjusting mounting groove. In addition, compared with only using two short planes and two side edges for cooperation, the arc separating sheet is approximately circular, which is more convenient in terms of designing the offset position and offset angle of the position adjusting mounting groove as well as assembly and processing.

[0017] The present invention is further configured as follows: The position-adjusting mounting grooves on the arc separating seat are sequentially distributed in a clockwise offset, reference position, counterclockwise offset, and reference position. The above structure enables the arc separating sheets to be staggered when stacked, and at the same time, a certain distance is maintained between the arc guiding synapses on the same straight line, so that the high, medium, and low arc guiding synapses are staggered with each other to ensure the best arc ignition effect, thereby improving the arc extinguishing effect.

[0018] For the convenience of the design and processing of the position-adjusting mounting grooves and the adaptive adjustment of the arc separating sheets on the position-adjusting mounting grooves, the present invention is further configured as follows: The sides of the arc separating sheets are on different chord planes of the same virtual cylinder; the three short planes on the supporting surface are on different chord planes of the same virtual cylinder.

[0019] The present invention is further configured as follows: The arc guiding synapses are fan-shapedly distributed on the circumference of the virtual circle of the virtual cylinder where the arc separating sheets are located. Through the above optimized design, firstly, compared with a straight line, more arc guiding synapses can be arranged in an arc or fan shape, thereby enhancing the arc ignition effect. Secondly, making the arc guiding synapses and other sides on the same virtual circle can facilitate processing and reduce obstacles when the arc separating sheets are adaptively adjusted on the position-adjusting mounting grooves (for itself, it is a rotation process), ensuring the flexibility of use of the quasi-circular arc separating sheets. Thirdly, the arc guiding synapses located in the middle position can shorten the distance between it and the moving contact and the static contact, so as to ignite the arc in the first time, improve the timeliness of arc extinguishing treatment, and improve the arc extinguishing performance of the arc extinguishing chamber.

[0020] As a preferred structure that is easy to process, has a good arc ignition effect, and is extremely convenient for adaptive adjustment, the present invention is further configured as follows: The arc separating sheet is a symmetric structure, which has 5 straight edges and 2 arc edges, and the arc guiding synapses are fan-shapedly distributed on the circumference of the virtual circle of the virtual cylinder where the arc separating sheet is located between the 2 arc edges.

[0021] To improve the arc ignition effect, the present invention is further configured as follows: The arc guiding synapses are in a tooth shape, and at the same time, the tooth-shaped arc guiding synapses are also convenient for staggered arrangement.

[0022] The present invention is further configured as follows: There are 3 arc guiding synapses, and a V-shaped gap is formed between adjacent arc guiding synapses, which can not only ensure the arc ignition effect, but also keep a certain distance between the arc guiding synapses, which can not only expand the angle range of arc ignition, but also prevent interference between the arc guiding synapses.

[0023] To prevent interference between the arc guiding synapses, the present invention is further configured as follows: The size of the V-shaped gap is not less than the size of the arc guiding synapses.

[0024] Another object of the present invention is to provide an arc separating seat, on which there are a number of position-adjusting mounting grooves for inserting arc separating sheets. The adjacent position-adjusting mounting grooves are adapted to the same arc separating sheet, and the shapes of two adjacent position-adjusting mounting grooves are different, so as to make the arc guiding synapses have different orientations after the arc separating sheets are assembled or make the arc guiding synapses of the arc separating sheet and the adjacent arc separating sheets stagger each other after assembly.

[0025] In another aspect, the difference of the arc separating seat lies in that the groove depths of two adjacent position-adjusting mounting grooves are different, one is high and the other is low; the high and low position-adjusting mounting grooves on one arc separating seat respectively correspond to the low and high position-adjusting mounting grooves on the other arc separating seat.

[0026] In another aspect, the structure of the arc separating seat is further arranged as follows: the bottom of the position-adjusting mounting groove includes a supporting surface formed by sequentially connecting at least two short planes distributed along the length direction of the position-adjusting mounting groove, and a fixed angle is formed between two adjacent short planes; the difference lies in that the angles and positions of the supporting surfaces on two adjacent position-adjusting mounting grooves are different.

[0027] Another object of the present invention is to provide an arc separating sheet, the arc separating sheet is of a symmetrical structure, it has at least three side edges, and at least two arc guiding synapses are distributed between the ends of two of the side edges.

[0028] In another aspect, the structure of the arc separating sheet is further arranged as follows: it has at least 4 main side edges and 2 auxiliary side edges, and the arc guiding synapses of the arc separating sheet are fan-shapedly distributed on the circumference of the virtual circle of the virtual cylinder where the arc separating sheet is located between the 2 auxiliary side edges.

[0029] In another aspect, the structure of the arc separating sheet is further arranged as follows: it has 5 straight edges and 2 arc edges, and the arc guiding synapses are fan-shapedly distributed on the circumference of the virtual circle of the virtual cylinder where the arc separating sheet is located between the 2 arc edges.

[0030] In another aspect, the structure of the arc separating sheet is further arranged as follows: there are 3 arc guiding synapses, and a V-shaped gap is formed between adjacent arc guiding synapses, and the size of the V-shaped gap is not less than the size of the arc guiding synapses.

[0031] In another aspect, the structure of the arc separating sheet is further arranged as follows: the arc guiding synapses are in a tooth shape.

[0032] The beneficial effects of the present invention are as follows: By providing an arc separating seat that can adjust the position such as the angle and height of the inserted arc separating piece, the same type of arc separating pieces assembled on the arc separating seat can be adaptively adjusted according to the shape differences of different position-adjusting mounting grooves on the arc separating seat, so that the orientations of the arc guiding synaptic knobs thereon are different or the orientations of the arc guiding synaptic knobs are staggeredly arranged, without the need to distinguish between the front and reverse assembly of the arc separating pieces, greatly reducing the assembly difficulty of the arc separating pieces and making them convenient for assembly and use. At the same time, in combination with the increased number of arc guiding synaptic knobs, getting rid of the structure in which the contour of the front edge of the existing arc extinguishing grid piece is symmetrically "V-shaped" or "U-shaped", the front edge of the arc separating piece of the present invention can be designed as a "convex" structure, shortening the distance between it and the moving contact and the static contact, thereby enhancing the arc leading speed and arc leading effect, and further improving the arc extinguishing performance of the arc extinguishing chamber, making it more suitable for practical use. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic top view of the overall structure of Specific Embodiment 1 of the present invention.

[0034] Figure 2 It is a schematic exploded view of the overall structure of Specific Embodiment 1 of the present invention.

[0035] Figure 3 It is a schematic view of the support structure of Specific Embodiment 1 of the present invention.

[0036] Figure 4 It is a schematic view of the cover structure of Specific Embodiment 1 of the present invention.

[0037] Figure 5 It is a schematic view of the structure of the first arc separating seat of Specific Embodiment 1 of the present invention.

[0038] Figure 6 It is a schematic view of the structure of the arc separating piece of Specific Embodiment 1 of the present invention.

[0039] Figure 7 It is a front view of the arc separating piece of Specific Embodiment 1 of the present invention.

[0040] Figure 8 It is a schematic view of the assembly process of the first arc separating seat - arc separating piece of Specific Embodiment 1 of the present invention.

[0041] Figure 9 It is an assembly schematic view of the first arc separating seat - arc separating piece of Specific Embodiment 1 of the present invention.

[0042] Figure 10 It is a side view of the assembly of the first arc separating seat - arc separating piece of Specific Embodiment 1 of the present invention.

[0043] Figure 11 It is a top view of the first arc separating seat - arc separating piece of Specific Embodiment 1 of the present invention.

[0044] Figure 12 for Figure 11 Schematic diagram of section view in direction A.

[0045] Figure 13 for Figure 11 Schematic diagram of cross-section in direction B.

[0046] Figure 14 for Figure 11 Schematic diagram of section view in direction C.

[0047] Figure 15 for Figure 11 Schematic diagram of the cross-section in the direction of D.

[0048] Figure 16 It is a schematic diagram of the assembly of the arc isolation seat and the arc isolation plate of the specific embodiment 1 of the present invention.

[0049] Reference numerals: 1—first arc isolation seat, 2—second arc isolation seat, 3—arc striking plate, 4—arc isolation plate, 5—support, 6—flame extinguishing plate 1, 7—support, 8—flame extinguishing plate 2, 9—cover, 10—gas generating material plate, 11—short rivet, 12—long rivet;

[0050] 101—separator, 102—main short plane one, 103—main short plane two, 104—auxiliary short plane one, 105—auxiliary short plane two, 106—slot, 110—first adjustment mounting slot, 120—second adjustment mounting slot, 130—third adjustment mounting slot, 140—fourth adjustment mounting slot, 401—main side one, 402—main side two, 403—arc side one, 404—rear side, 405—arc guide synapse, 406—arc guide gap. DETAILED DESCRIPTION

[0051] Example 1 Combination Figure 1 and Figure 2 As shown, the present invention provides an arc extinguishing chamber of a circuit breaker, comprising a plurality of arc-isolating plates 4, a first arc-isolating seat 1, a second arc-isolating seat 2, flame-extinguishing plates 1 6 and 2 8 arranged opposite to each other, a support 5, a bracket 7 and a cover 9, wherein the arc-isolating plate 4 is provided with a plurality of side edges, each with two arc edges, between the two arc edges is the front end corresponding to the contact, and at least three arc-guiding contacts 405 are provided at intervals on the front end. Position adjustment installation grooves for installing the arc-isolating plates 4 are provided on the first arc-isolating seat 1 and the second arc-isolating seat 2 respectively, and a plurality of arc-isolating plates 4 are inserted into the position adjustment installation grooves. The rear ends of the first arc-isolating seat 1 and the second arc-isolating seat 2 are also provided with slots 106 corresponding to the positions, and the arc-starting plate 3 is fixedly installed on the first arc-isolating seat 1 and the second arc-isolating seat 2 through the slots 106. At the bottom ends of the first arc isolation seat 1 and the second arc isolation seat 2, three mounting holes arranged side by side are provided, and a gas-generating material sheet 10 is fixedly installed on each mounting hole through a short rivet 11, and the gas-generating material sheet 10 is close to the arc-guiding synapse 405 on the arc isolation sheet 4 while maintaining a certain distance.

[0052] See Figure 6 With Figure 7 As shown, there are five side edges and two arc edges provided on the arc separating piece 4, including the main side edge one 401 corresponding to the first arc separating seat 1, the main side edge two 402, the arc edge one 403, the main side edge three, the main side edge four, and the arc edge two corresponding to the second arc separating seat 2, as well as a common side edge - the rear side edge 404. There are evenly distributed dentate arc synaptic contacts 405 between the arc edge one 403 and the arc edge two. There are three arc synaptic contacts 405, and a V-shaped gap is formed between adjacent arc synaptic contacts 405. The size of the V-shaped gap is not less than the size of the arc synaptic contact 405, thereby forming a dentate structure with excellent arc ignition effect. The dentate structure and the V-shaped structure can achieve the functions of more quickly pulling the arc and dividing the arc.

[0053] Continue to refer to Figure 1 With Figure 2 As shown, two mounting holes are respectively opened at the tops of the first arc separating seat 1 and the second arc separating seat 2. Three mounting seats arranged in the same row and spaced apart are convexly provided on the surface of the support 5 facing away from the first arc separating seat 1 and the second arc separating seat 2. Two connecting seats arranged side by side are convexly provided on both sides of the bottom surface of the cover 9 corresponding to the positions of the mounting seats. The two connecting seats are respectively embedded into the two gaps formed between the three mounting seats, and finally fixed to the first arc separating seat 1 and the second arc separating seat 2 together with the long rivet 12. The flame extinguishing piece one 6 and the flame extinguishing piece two 8 are arranged between the support 5 and the cover 9. A bracket 7 is respectively clamped between the flame extinguishing piece one 6 and the flame extinguishing piece two 8 and between the surface of the flame extinguishing piece one 6 and the support 5, so that a certain distance is maintained between the flame extinguishing piece one 6 and the flame extinguishing piece two 8 and between the flame extinguishing piece one 6 and the support 5 to achieve arc extinguishing.

[0054] In this embodiment, the adjustment of the position is realized by the cooperation and installation of different side edges on the arc separating piece 4 with the adjustment installation groove: for example, in a general implementation manner, the above-mentioned main side edge one 401 and the main side edge two 402 cooperate to form the first part of the cooperation with the adjustment installation groove, and the main side edge two 402 and the arc edge one 403 cooperate to form the second part of the cooperation with the adjustment installation groove. In a superior implementation manner, the above-mentioned main side edge one 401, the main side edge two 402, and the rear side edge 404 cooperate to form the first part of the cooperation with the adjustment installation groove, and the main side edge one 401, the main side edge two 402, and the arc edge one 403 cooperate to form the second part of the cooperation with the adjustment installation groove. The cooperation parts formed by the combination of the three side edges make the adjustment installation groove wrap the arc separating piece 4 more tightly, ensuring the structural stability of the installation part of the arc separating piece 4 and the adjustment installation groove, and it is not easy to occur relative sliding or rotation.

[0055] Refer to Figure 5 As shown, the shapes of two adjacent adjustment installation grooves on the first arc separating seat 1 and the second arc separating seat 2 for inserting the arc separating piece 4 in this embodiment are different. In this embodiment, Figure 5As shown in the figure, it includes the first position-adjusting installation groove 110, the second position-adjusting installation groove 120, the third position-adjusting installation groove 130, and the fourth position-adjusting installation groove 140 as a group, with a total of three different shapes of position-adjusting installation grooves. Among them, the structures, shapes, and positions of the first installation groove and the third installation groove are the same and serve as the reference position. The second position-adjusting installation groove 120 is formed by rotating a certain angle clockwise based on the first position-adjusting installation, and the fourth position-adjusting installation groove 140 is formed by rotating a certain angle counterclockwise based on the first position-adjusting installation. Moreover, the difference between the fourth position-adjusting installation groove 140 and the first position-adjusting installation groove 110, the third position-adjusting installation groove 130, and the second position-adjusting installation groove 120 is that the first position-adjusting installation groove 110, the third position-adjusting installation groove 130, and the second position-adjusting installation groove 120 are all composed of the main short plane one 102, the main short plane two 103, and the auxiliary short plane one 104, and the auxiliary short plane one 104 is connected to the main short plane two 103; while the fourth position-adjusting installation groove 140 is composed of the main short plane one 102, the main short plane two 103, and the auxiliary short plane two 105, and the auxiliary short plane two 105 is connected to the main short plane one 102. That is to say, the auxiliary short plane one 104 and the auxiliary short plane two 105 are in different deflection directions.

[0056] In the above structure, the shapes of the first position-adjusting installation groove 110, the second position-adjusting installation groove 120, the third position-adjusting installation groove 130, and the fourth position-adjusting installation groove 140 are generally similar, but in other aspects, such as position, height, angle, etc., due to clockwise or counterclockwise rotation adjustment centered on the center of the virtual circle where the main short plane one 102 and the main short plane two 103 are located together, there are certain offsets or fine-tunings. As a result, while the first position-adjusting installation groove 110, the second position-adjusting installation groove 120, the third position-adjusting installation groove 130, and the fourth position-adjusting installation groove 140 can be used in cooperation with the arc separating piece 4, there are small differences in the specific cooperation situations at each place, causing the arc guiding synapses 405 on adjacent arc separating pieces 4 to be staggered. Therefore, in the present invention, the arc separating piece 4 can be installed without distinguishing between the front and the back. During installation, it is installed uniformly, and the arc separating piece 4 will adaptively adjust its own position and angle according to the shape of the corresponding position-adjusting installation groove.

[0057] Both sides of the arc separating piece 4 are inserted into the position-adjusting installation grooves on the first arc separating seat 1 and the second arc separating seat 2. For the assembly process, see Figure 8 、 Figure 13As shown in the figure, taking the insertion of one side of the arc separating piece 4 into the first adjustment groove of the first isolation seat as an example - the main side one 401 is matched with the main short plane one 102, the main side two 402 is matched with the main short plane two 103, and the arc side one 403 is matched with the auxiliary short plane one 104. The simultaneous cooperation of the above three makes the arc separating piece 4 completely embedded in the first adjustment groove and fully matched with the supporting surface jointly composed of the main short plane one 102, the main short plane two 103, and the auxiliary short plane one 104, so that the arc separating piece 4 can be adaptively adjusted following the shape and position of the first adjustment groove. At the same time, due to the common fixation of the first arc separating seat 1 and the second arc separating seat 2, the arc separating piece 4 is also clamped in the gap between the middle parts of the first arc separating seat 1 and the second arc separating seat 2. Figure 2 As shown in the figure, the front end of the arc separating piece 4 faces, and its arc guiding synapse 405 will face the moving contact and the static contact for arc guiding. When the electric arc passes through the main body part of the arc separating piece 4, it will be cut into different short arcs and then enter the first flame extinguishing piece 6 or the second flame extinguishing piece 8 to be extinguished.

[0058] It should be noted that to achieve the insertion and matching between the arc separating edge and the position adjustment installation groove, the groove width of the position adjustment installation groove should be adapted to the thickness of the arc separating piece 4, and the shape of the groove bottom of the position adjustment installation groove also needs to be adapted to the shape of the arc separating piece 4 installed on it.

[0059] Naturally, in the above-mentioned position adjustment installation groove, the angles between the main short plane one 102 and the main short plane two 103, between the auxiliary short plane one 104 and the main short plane two 103, and between the auxiliary short plane two 105 and the connection of the main short plane one 102 are all fixed angles. That is, in different position adjustment installation grooves, the angles between the above-mentioned short planes in the first position adjustment installation groove 110, the second position adjustment installation groove 120, the third position adjustment installation groove 130, and the fourth position adjustment installation groove 140 are all the same. The difference lies in the angles and positions of the supporting surfaces on two adjacent position adjustment installation grooves. That is, although different position adjustment installation grooves respectively correspond to different parts on the arc separating piece 4 and are matched with different parts, in one product, the structure of the arc separating piece 4 used is the same kind.

[0060] Through the above structure, the relative angle of two adjacent position adjustment installation grooves can be adjusted during design or the relative angle and relative position of the two position adjustment installation grooves can be controlled to realize the adjustment of the orientation of the arc guiding synapse 405 on the arc separating piece 4 assembled therein. Furthermore, the arc guiding synapses 405 on adjacent arc separating pieces 4 can be staggered with each other or the depth of the arc guiding synapse 405 can be adjusted, so that it can be adjusted in terms of angle and depth.

[0061] In addition to the position types of the first position adjustment installation groove 110, the second position adjustment installation groove 120, the third position adjustment installation groove 130, and the fourth position adjustment installation groove 140 described above, the following several implementation manners can also be considered: First, the first position adjustment installation groove 110, the second position adjustment installation groove 120, and the third position adjustment installation groove 130 are taken as a group with clockwise offset, reference position, and counterclockwise offset, and the remaining position adjustment installation grooves repeat the selected types of the first position adjustment installation groove 110 and the second position adjustment installation groove 120. Second, the first position adjustment installation groove 110 and the second position adjustment installation groove 120 adopt any two of clockwise offset, reference position, counterclockwise offset, and reference position, and the remaining position adjustment installation grooves repeat the selected types of the first position adjustment installation groove 110 and the second position adjustment installation groove 120. Third, a high reference position is added on the basis of the above three classifications. Specifically, the bearing surface can be classified into a low reference position, a high reference position, a low clockwise offset and a low counterclockwise offset based on the low reference position, and a high clockwise offset and a high counterclockwise offset based on the high reference position. The first position adjustment installation groove 110 and the second position adjustment installation groove 120 adopt two of the above, and the remaining position adjustment installation grooves repeat the selected types of the first position adjustment installation groove 110 and the second position adjustment installation groove 120; or, the first to sixth position adjustment installation grooves respectively select one of the above types, and the remaining position adjustment installation grooves repeat the first to sixth position adjustment installation grooves for sequential distribution or. The selection and arrangement of specific types can be selected according to specific usage requirements, and should not be limited to the distribution described in this application.

[0062] The side edges of the arc separating piece 4 are on different chord planes of the same virtual cylinder; the arc guiding synapses 405 are fan-shapedly distributed on the circumference of the virtual circle of the virtual cylinder where the arc separating piece 4 is located. Through the above optimized design, on the one hand, compared with a straight line, more arc guiding synapses 405 can be arranged in an arc or fan shape, so as to enhance the arc ignition effect. On the other hand, making the arc guiding synapses 405 and other side edges on the same virtual circle can facilitate processing and reduce obstacles when the arc separating piece 4 makes an adaptive adjustment (which is a rotation process for itself) on the position adjustment installation groove, ensuring the flexibility of use of the circular arc separating piece 4. On the third hand, the arc guiding synapses 405 located in the middle position can shorten the distance between it and the moving contact and the static contact, so as to arc ignition in the first time, improve the timeliness of arc extinguishing treatment, and improve the arc extinguishing performance of the arc extinguishing chamber.

[0063] The V-shaped gap size is not less than the size of the arc guiding synapse 405.

[0064] Embodiment 2 The purpose of this embodiment is to provide an arc separating seat, which is provided with a plurality of position adjustment installation grooves for inserting the arc separating piece 4. Adjacent position adjustment installation grooves are adapted to the same arc separating piece 4, and the shapes of adjacent two position adjustment installation grooves are different, so as to make the arc guiding synapses 405 of the arc separating piece 4 have different orientations after assembly or make the arc guiding synapses 405 of the arc separating piece 4 and the adjacent arc separating piece 4 intersect with each other after assembly.

[0065] As a preferred embodiment, the groove depths of two adjacent position-adjusting mounting grooves are one high and one low.

[0066] As another preferred embodiment, the difference between this embodiment and the embodiment provided in the previous paragraph lies in that in this embodiment, the arc separating piece 4 is mainly adapted to adjust its angle during assembly. The specific structure is as follows: The bottom of the position-adjusting mounting groove includes a supporting surface formed by sequentially connecting at least two short planes distributed along the length direction of the position-adjusting mounting groove, and a fixed angle is formed between two adjacent short planes; the difference is that the angles and positions of the supporting surfaces on two adjacent position-adjusting mounting grooves are different.

[0067] Embodiment 3 The purpose of this embodiment is to provide an arc separating piece 4, which is a symmetric structure and has at least three side edges, and at least two spaced-apart arc guiding synapses 405 are distributed between the ends of two of the side edges.

[0068] Of course, in order to enable the arc separating piece 4 to adapt to the arc separating seat provided in Embodiment 2 in a self-rotating manner, the arc separating piece 4 in this embodiment has at least 4 main side edges and 2 auxiliary side edges. One side includes main side edge one 401, main side edge two 402 and an auxiliary side edge. When it cooperates with the arc separating seat, taking the partial main side edge one 401 and all of the main side edge two 402 to cooperate with the position-adjusting mounting groove together as the first adjustment position, taking the partial main side edge one 401, the main side edge two 402 and the auxiliary side edge to cooperate with the position-adjusting mounting groove together as the second adjustment position, and taking all of the main side edge one 401 and all of the main side edge two 402 of the arc separating piece 4 to cooperate with the position-adjusting mounting groove together as the third adjustment position to achieve three adjustment positions. When corresponding to the same arc separating piece 4, the angle between the main side edge one 401 and the main side edge two 402 is fixed, and the angle between the main side edge two 402 and the auxiliary side edge is also fixed. The above partial or all of the cooperation is adjusted by rotating the angles between the main side edge one 401 and the main side edge two 402 relative to the surface plane of the arc separating seat body.

[0069] In one embodiment, the side edges of the arc separating piece 4 are on different chord tangent planes of the same virtual cylinder - that is, the above-mentioned main side edges and auxiliary side edges are all distributed on the same virtual circle. Further combined with the fact that the arc guiding synapses 405 are fan-shaped and distributed on the circumference of the same virtual circle between the 2 auxiliary side edges, the arc separating piece 4 as a whole can be approximated to a circular arc separating piece 4, so that the relative position of the arc separating piece 4 on the arc separating seat can be adjusted more flexibly to expand the arc guiding range. And the surface area of the rear end of the arc separating piece 4 is slightly larger than that of the common arc extinguishing chamber. While increasing the arc resistance by no less than that of the common arc extinguishing chamber, it can conduct more internal heat of the arc, reduce the movement speed of particles, accelerate the recombination speed, and extinguish the arc as soon as possible.

[0070] As a preferred specific embodiment described above, the arc separating piece 4 has five straight edges and two arc edges. The five straight edges and the two arc edges are on different chord tangent planes of the same virtual cylinder and are symmetrically distributed. The arc guiding synapses 405 are fan-shapedly distributed on the circumference of the virtual circle where the arc separating piece 4 is located between the two arc edges.

[0071] The arc guiding synapses 405 are dentate. There are three arc guiding synapses 405. A V-shaped gap is formed between adjacent arc guiding synapses 405. The size of the V-shaped gap is not less than the size of the arc guiding synapses 405, thereby forming a dentate structure with excellent arc starting effect. The dentate structure and the V-shaped structure can achieve the functions of more quickly pulling the arc and dividing the arc.

[0072] Embodiment 4 The difference between this embodiment and Embodiment 1 is that the groove depths of two adjacent position adjustment mounting grooves are different, one is high and the other is low. The high and low position adjustment mounting grooves on the first arc separating seat 1 correspond to the low and high position adjustment mounting grooves on the second arc separating seat 2 respectively. By providing different groove depths, the arc separating piece 4 embedded therein has different heights, so that when the same arc separating piece 4 is assembled into adjacent position adjustment mounting grooves, the arc guiding synapses 405 are arranged in parallel and staggered.

[0073] Embodiment 5 The difference between this embodiment and Embodiment 1 is that the radius of the virtual circle where the arc guiding synapses 405 are located is greater than the radius of the cross-section of the same virtual cylinder where multiple straight edges and arc edges of the arc separating piece 4 are located: the side surface of the arc separating piece 4 is approximately a virtual ellipse. The cross-section of the same virtual circle where multiple straight edges and arc edges are located is the minor axis of the virtual ellipse, and the radius of the virtual circle where the arc guiding synapses 405 are located is the major axis of the virtual ellipse. The advantage of this embodiment is that the shape and structure of the arc separating piece can be expanded. The disadvantage is that the arc guiding range of the arc guiding synapses 405 depending on the position change of the position adjustment mounting groove and the arc separating piece 4 will be smaller than the range when the arc separating piece 4 in Embodiment 1 is approximately a virtual circle.

[0074] Of course, in addition to the virtual ellipse described in this embodiment, the shape of the arc separating piece 4 can also be designed into other shapes, as long as it can change the orientation, position, height difference between adjacent ones, etc. of the arc guiding synapses 405 after being cooperatively installed with different parts of the position adjustment mounting groove in the way of its own rotation and / or sliding, and further expand the arc guiding range of the arc guiding synapses.

[0075] In summary, the present invention provides a circuit breaker arc extinguishing chamber, an arc separating piece 4 and an arc separating seat with a special structure. The arc extinguishing chamber is equipped with an arc separating piece 4 different from common arc extinguishing chamber components. According to the high and low installation structure on the arc separating seat, different installation angles are achieved. On the one hand, the same arc separating pieces 4 assembled on the arc separating seat can be adaptively adjusted according to the shape differences of different adjustment installation grooves on the arc separating seat, so that the orientations of the arc guiding synapses 405 thereon are different or the arc guiding synapses 405 are arranged staggeredly, without the need to distinguish the front and back assembly of the arc separating pieces 4, greatly reducing the assembly difficulty of the arc separating pieces 4 and making them convenient for assembly and use. On the other hand, by utilizing the toothed structure and V-shaped structure on the arc separating piece 4, the function of more quickly pulling and separating the arc is achieved. The surface area of the middle and rear ends of the arc separating piece 4 is slightly larger than that of the common arc extinguishing chamber. While increasing the arc resistance not less than that of the common arc extinguishing chamber, it can conduct more internal heat of the arc, reduce the movement speed of particles, accelerate recombination and extinguish the arc as soon as possible.

Claims

1. The arc extinguishing chamber of a circuit breaker, comprising arc dividing plates, two relatively arranged arc dividing seats, flame extinguishing plates, and a cover, characterized in that: The arc separating piece is provided with at least two arc guiding synapses that are spaced apart and distributed at one end corresponding to the contact. The arc separating seat is provided with an adjustment mounting groove for mounting the arc separating piece. The adjustment mounting groove is adapted to the shape of a part of the arc separating piece mounted thereon. The structures of two adjacent adjustment mounting grooves are different, so that the arc guiding synapses on two adjacent arc separating pieces have different orientations or the arc guiding synapses of the arc separating piece after assembly are staggered with those of the adjacent arc separating piece; the parts of the adjacent arc separating pieces that are cooperatively mounted with the adjustment mounting grooves are arranged in a staggered manner. The arc guiding synapses on the adjacent arc separating pieces are distributed on the circumference of a virtual circle; the bottom of the adjustment mounting groove includes a supporting surface formed by sequentially connecting at least two short planes distributed along the length direction of the adjustment mounting groove. A fixed angle is formed between two adjacent short planes; the difference lies in that the angles and / or positions of the fixed angles of the supporting surfaces on two adjacent adjustment mounting grooves are different; one end of the arc separating piece corresponding to the adjustment mounting groove has at least two side edges respectively corresponding to the supporting surface, and the angle between the side edges is the same as the fixed angle between the two corresponding short planes.

2. The arc extinguishing chamber of the circuit breaker according to claim 1, wherein: The supporting surface is formed by sequentially connecting three short planes. One end of the arc separating piece corresponding to the arc separating seat has four side edges that cooperate with the supporting surface.

3. The arc extinguishing chamber of the circuit breaker according to claim 1, characterized in that: The supporting surfaces are divided into three categories: a reference position, a clockwise offset based on the reference position, and a counterclockwise offset based on the reference position. The adjustment mounting grooves on the arc separating seat are distributed in sequence as clockwise offset, reference position, counterclockwise offset, and reference position.

4. The arc extinguishing chamber of the circuit breaker according to claim 1, wherein: The side edges of the arc separating piece are on different chord tangent planes of the same virtual cylinder; the three short planes on the supporting surface are on different chord tangent planes of the same virtual cylinder.

5. The arc extinguishing chamber of the circuit breaker according to claim 4, characterized in that: The arc guiding synapses are fan-shapedly distributed on the circumference of the virtual circle of the virtual cylinder where the arc separating piece is located.

6. The arc extinguishing chamber of the circuit breaker according to claim 4 or 5, characterized in that: The arc separating piece has a symmetric structure. It has 5 straight edges and 2 arc edges. The arc guiding synapses are fan-shapedly distributed on the circumference of the virtual circle of the virtual cylinder where the arc separating piece is located between the 2 arc edges.

7. The arc extinguishing chamber of the circuit breaker according to claim 1, characterized in that: The arc guiding synapses are in a tooth shape.

8. The arc extinguishing chamber of the circuit breaker according to claim 5 or 7, characterized in that: There are 3 arc guiding synapses, and a V-shaped gap is formed between adjacent arc guiding synapses.

9. An arc separating seat applied in the arc extinguishing chamber of the circuit breaker according to claim 1, characterized in that: There are a number of adjustment mounting grooves into which the arc separating piece can be inserted. Adjacent adjustment mounting grooves are adapted to the same arc separating piece, and the shapes of two adjacent adjustment mounting grooves are different, so that the arc guiding synapses of the arc separating piece have different orientations after assembly or the arc guiding synapses of the arc separating piece after assembly are staggered with those of the adjacent arc separating piece.

10. The arc separating seat according to claim 9, characterized in that: The difference of the arc separating seat lies in that the depths of two adjacent adjustment mounting grooves are different, one is high and the other is low; the high and low adjustment mounting grooves on one arc separating seat respectively correspond to the low and high adjustment mounting grooves on the other arc separating seat.

11. The arc separating seat according to claim 9, wherein: The bottom of the adjustment mounting groove includes a supporting surface formed by sequentially connecting at least two short planes distributed along the length direction of the adjustment mounting groove. A fixed angle is formed between two adjacent short planes; the difference lies in that the angles and positions of the supporting surfaces on two adjacent adjustment mounting grooves are different.

12. An arc separating plate applied to the arc extinguishing chamber of the circuit breaker according to claim 1, wherein the arc separating plate has a symmetrical structure, and is characterized in that: It has at least three side edges, and at least two arc guiding synapses that are spaced apart are distributed between the ends of two of the side edges.

13. The arc separating piece according to claim 12, characterized in that: It has at least 4 main side edges and 2 auxiliary side edges. The guiding arc synapses are fan-shapedly distributed on the circumference of the virtual circle of the virtual cylinder where the partition arc piece is located between the 2 auxiliary side edges; it has 5 straight edges and 2 arc edges, and the guiding arc synapses are fan-shapedly distributed on the circumference of the virtual circle of the virtual cylinder where the partition arc piece is located between the 2 arc edges.

14. The arc separating piece according to claim 12 or 13, characterized in that: There are 3 guiding arc synapses, and a V-shaped gap is formed between adjacent guiding arc synapses, and the size of the V-shaped gap is not less than the size of the guiding arc synapses; and / or the guiding arc synapses are serrated.

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