Exhaust structure

Abstract

The utility model relates to the field of low-voltage electric appliances, in particular to an exhaust structure, a shell arc extinguishing structure is used for being matched with arc extinguishing chambers in a one-to-one mode, an inner air channel is formed between an air guide structure and the shell side wall of a shell, the air guide structure is arranged between the inner air channel and an arc extinguishing area, and an air outlet is formed in the shell side wall; one side of each guide plate of the air guide structure faces the side wall of the shell, the other side of each guide plate is used for facing an exhaust port of an arc extinguish chamber arranged in the arc extinguish area, the guide plates are sequentially arranged on one side of the arc extinguish area in the moving direction of the movable contact part, and an air passing channel is arranged between every two adjacent guide plates. An air passage is arranged between one end, close to the contact position, of the guide plate close to the contact position and the side wall of the shell, an air passage is arranged at one end, close to the disconnection position, of the guide plate close to the disconnection position, and the air passage is used for communicating the inner air passage with an exhaust port corresponding to the arc extinguish chamber; the exhaust structure improves the arc extinguishing effect and ensures that the arc gas is efficiently exhausted.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, in particular to an exhaust structure. Background Art

[0002] Existing rotary disconnectors consist of an operating mechanism and a switch unit. The switch unit comprises multiple stacked switch units, each of which includes a rotating movable contact mechanism and a stationary contact. The movable contact mechanism is driven by the operating mechanism to close and open with the stationary contact. Each switch unit also has an arc extinguishing chamber. Arc gas generated by the arc extinguishing chamber is directly discharged into the internal air duct of the switch unit and then discharged through an outlet provided on the side wall of the unit housing. The disorderly flow of arc gas significantly affects the discharge efficiency. Furthermore, relying solely on the arc extinguishing chamber to extinguish the arc lacks effective measures to improve arc extinguishing performance. Furthermore, the arc remains in the arc extinguishing chamber for a short time, often resulting in incomplete arc extinguishing. Utility Model Content

[0003] The purpose of the present invention is to overcome at least one defect of the prior art and provide an exhaust structure that improves the arc extinguishing effect and ensures that arc gas is efficiently discharged.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An exhaust structure includes a housing for accommodating a contact system and an arc extinguishing chamber, wherein the contact system includes a contact pair that matches the arc extinguishing chamber one-to-one and includes a static contact portion and a dynamic contact portion;

[0006] The housing includes a housing arc extinguishing structure for one-to-one cooperation with the arc extinguishing chamber, the housing arc extinguishing structure includes an arc extinguishing area for accommodating the arc extinguishing chamber, a gas guide structure and an inner gas channel, and a gas outlet provided on a side wall of the housing, wherein the inner gas channel is formed between the gas guide structure and the side wall of the housing, and the gas guide structure is provided between the inner gas channel and the arc extinguishing area;

[0007] The air guide structure includes at least two guide plates, one side of each guide plate faces the side wall of the shell and the other side is used to face the exhaust port of the arc extinguishing chamber arranged in the arc extinguishing area, and each guide plate is arranged in sequence on one side of the arc extinguishing area along the movement direction of the moving contact part. An air duct is provided between adjacent guide plates, an air duct is provided between the end of the guide plate close to the contact position adjacent to the contact position and the side wall of the shell, and an air duct is provided at the end of the guide plate close to the disconnection position adjacent to the disconnection position. The air duct is used to connect the internal air duct and the exhaust port of the corresponding arc extinguishing chamber.

[0008] Furthermore, the shell also includes a contact position for accommodating the static contact part and a disconnect position for accommodating the dynamic contact part moving to the disconnect position. The contact position and the disconnect position are respectively arranged corresponding to the two ends of the arc extinguishing area. The contact position is arranged on the outside of one end of the corresponding arc extinguishing area, and the disconnect position is arranged at the other end of the corresponding arc extinguishing area.

[0009] Furthermore, the air outlet is located between the contact position and the disconnection position, and the air outlet is arranged close to the contact position relative to the disconnection position or close to the disconnection position relative to the contact position.

[0010] Furthermore, the arc extinguishing area is a fan-shaped area, and the guide plates of the air guide structure are arranged in an arc shape, and the guide plates are arranged around the arc extinguishing area along the movement direction of the dynamic contact part.

[0011] Furthermore, the shell also includes a shell shaft hole arranged on its bottom wall and used to support the rotation of the contacts of the moving contact mechanism; the sides of the guide plate for the exhaust port facing the arc extinguishing chamber are all arc-shaped sides, and each arc-shaped side is arranged concentrically and coincides with the axis of the shell shaft hole.

[0012] Furthermore, the side of the guide plate facing the arc extinguishing area is also used to cooperate with the side edge of the arc extinguishing chute of the arc extinguishing chamber to limit the arc extinguishing chamber in the working position.

[0013] Furthermore, the number of guide plates of the air guide structure is m, where m is an integer and is ≥3.

[0014] Furthermore, the shell also includes a combing column arranged in the inner air channel and matched one-to-one with the air outlet, and the combing column is located on one side of the inner end of the corresponding air outlet and is arranged opposite to it.

[0015] Furthermore, the combing column is a polygonal column, and one edge of the combing column is opposite to the inner end of the air outlet; or, the combing column is a cylinder.

[0016] Furthermore, the shell includes four shell side walls, which are a left side wall and a right side wall arranged opposite to each other, and a front side wall and a rear side wall arranged opposite to each other. The left side wall, the rear side wall, the right side wall and the front side wall are connected end to end in sequence and form four shell inner corners. The air outlet is arranged on a side wall of the shell and is arranged near an inner corner of the shell.

[0017] Furthermore, the direction of the air outlet is perpendicular to the side wall of the shell where the air outlet is located.

[0018] Furthermore, the housing includes two groups of housing arc extinguishing structures respectively arranged on both radial sides of the housing shaft hole of the housing.

[0019] Further, the two sets of the arc extinguishing structures of the housing are respectively the left arc extinguishing structure of the housing and the right arc extinguishing structure of the housing. The left arc extinguishing structure of the housing and the right arc extinguishing structure of the housing are centrosymmetric structures with the axis of the housing shaft hole as the central symmetry axis;

[0020] The gas guiding structure, arc extinguishing area, inner air duct, and air outlet of the left arc extinguishing structure of the housing are the left gas guiding structure, left arc extinguishing area, left inner air duct, and left air outlet respectively. The contact position and disconnection position of the housing corresponding to the left arc extinguishing area are the rear contact position and the front disconnection position respectively; the left gas guiding structure includes a first left guide plate, a second left guide plate, and a third left guide plate that are arranged in sequence around the corresponding arc extinguishing area along the movement direction of the corresponding moving contact part. Each left guide plate is an arc-shaped plate, and all the left guide plates as a whole form an arc-shaped structure. Air channels are provided between adjacent left guide plates. The first left guide plate is arranged near the rear contact position of the housing, the third left guide plate is arranged near the front disconnection position of the housing. An air channel is provided between one end of the first left guide plate near the rear contact position and the rear side wall of the housing, and an air channel is provided between one end of the third left guide plate near the front disconnection position and the front side wall of the housing. Each air channel is connected to the left inner air duct.

[0021] Further, the combing column of the housing cooperating with the left air outlet is the left combing column; the left gas guiding structure further includes a first left auxiliary plate and a second left auxiliary plate. One end of the first left auxiliary plate is connected to the middle of the first left guide plate, and the other end extends into the left inner air duct and extends towards the left air outlet, and this end is denoted as the free end of the first left auxiliary plate. The first left auxiliary plate and the first left guide plate as a whole form an "丄" shaped structure. One end of the second left auxiliary plate extends into the air channel between the first left guide plate and the second left guide plate, and this end is denoted as the inner end of the second left auxiliary plate, and the other end extends towards the free end of the first left auxiliary plate, and this end is denoted as the outer end of the second left auxiliary plate. The inner end of the second left auxiliary plate is in abutting limit fit with the side edge of the arc extinguishing partition of the corresponding arc extinguishing chamber. The outer end of the second left auxiliary plate extends into the left inner air duct and is arranged at an interval relative to the free end of the second left auxiliary plate, and the gap between the outer end of the second left auxiliary plate and the second left auxiliary plate faces the left combing column.

[0022] Further, the two sets of the arc extinguishing structures of the housing are respectively the left arc extinguishing structure of the housing and the right arc extinguishing structure of the housing; the gas guiding structure, arc extinguishing area, inner air duct, and air outlet of the left arc extinguishing structure of the housing are the left gas guiding structure, left arc extinguishing area, left inner air duct, and left air outlet respectively. The contact position and disconnection position of the housing corresponding to the left arc extinguishing area are the rear contact position and the front disconnection position respectively; the gas guiding structure, arc extinguishing area, inner air duct, and air outlet of the right arc extinguishing structure of the housing are the right gas guiding structure, right arc extinguishing area, right inner air duct, and right air outlet respectively. The contact position and disconnection position of the housing corresponding to the right arc extinguishing area are the front contact position and the rear disconnection position respectively;

[0023] The left gas guiding structure includes a first left guide plate, a second left guide plate, and a third left guide plate that surround the left arc extinguishing area and are arranged in sequence along the movement direction of the corresponding moving contact part. Each left guide plate is an arc-shaped plate, and all the left guide plates form an arc-shaped structure as a whole. An air passage is provided between adjacent left guide plates. The first left guide plate is arranged near the rear contact position, and the third left guide plate is arranged near the front disconnection position. An air passage is provided between one end of the first left guide plate near the rear contact position and the rear side wall of the housing, and an air passage is provided between one end of the third left guide plate near the front disconnection position and the front side wall of the housing. Each air passage is connected to the left inner air passage;

[0024] The right gas guiding structure includes a first right guide plate, a second right guide plate, a third right guide plate, and a fourth right guide plate that surround the right arc extinguishing area and are arranged in sequence along the movement direction of the corresponding moving contact part. Each right guide plate is an arc-shaped plate structure, and all the right guide plates form an arc-shaped structure as a whole. The first right guide plate is arranged near the front contact position, and the fourth right guide plate is arranged near the rear disconnection position. An air passage is provided between one end of the first right guide plate near the front contact position and the front side wall of the housing, and an air passage is provided between one end of the fourth right guide plate near the rear disconnection position and the rear side wall of the housing. An air passage is provided between each adjacent right guide plate, and each air passage is connected to the right inner air passage.

[0025] Further, the combing column of the housing that cooperates with the left air outlet is the left combing column; the combing column of the housing that cooperates with the right air outlet is the right combing column;

[0026] The left gas guiding structure further includes a first left auxiliary plate and a second left auxiliary plate. One end of the first left auxiliary plate is connected to the middle of the first left guide plate, and the other end extends towards the left air outlet, and this end is denoted as the free end of the first left auxiliary plate. The first left auxiliary plate extends into the left inner air passage, and an air passage is provided between it and the rear side wall. The first left auxiliary plate and the first left guide plate form an "丄" shaped structure as a whole. One end of the second left auxiliary plate extends into the air passage between the first left guide plate and the second left guide plate, and this end is denoted as the inner end of the second left auxiliary plate. The other end extends towards the free end of the first left auxiliary plate, and this end is denoted as the outer end of the second left auxiliary plate. The outer end of the second left auxiliary plate extends into the left inner air passage. The inner end of the second left auxiliary plate is in abutting and limiting fit with the side edge of the arc extinguishing partition of the corresponding arc extinguishing chamber. The outer end of the second left auxiliary plate is arranged at a relative interval with the free end of the second left auxiliary plate, and the gap between the outer end of the second left auxiliary plate and the free end of the second left auxiliary plate faces the left combing column;

[0027] The right air guide structure also includes a first right auxiliary plate, a second right auxiliary plate and a third right auxiliary plate, one end of the first right auxiliary plate is connected to an end of the first right guide plate close to the second right guide plate, the other end extends to the gap between the second right guide plate and the right side wall and this end is recorded as the free end of the first right auxiliary plate, the first right auxiliary plate extends into the right inner air duct and an air duct is provided between it and the right side wall, one end of the second right auxiliary plate is inserted into the air duct between the third right guide plate and the fourth right guide plate and this end is recorded as the inner end of the second right auxiliary plate, the other end extends to the gap between the fourth right guide plate and the right side wall and this end is recorded as the outer end of the second right auxiliary plate, the inner end of the second right auxiliary plate is aligned with the extinguishing end of the corresponding arc extinguishing chamber The side edges of the arc partition plate are pressed against each other and limited, the outer end of the second right auxiliary plate extends into the right inner airway and is spaced apart from the right side wall, the second right auxiliary plate as a whole is spaced apart from the right side wall, one end of the third right auxiliary plate is connected to the bent end of the fourth right guide plate close to the rear breaking position, and the other end extends to the gap between the right combing column and the rear side wall and this end is recorded as the free end of the third right auxiliary plate, the free end of the third right auxiliary plate extends into the right inner airway and an air passage is provided between the rear side wall, the fourth right guide plate and the third right auxiliary plate are V-shaped as a whole, the opening of the V-shaped structure faces the right side wall, and the gap between the outer end of the second right auxiliary plate and the free end of the third right auxiliary plate is opposite to the right combing column.

[0028] The exhaust structure of the present invention and its gas guide structure bring the following benefits: 1. The guide plates of the gas guide structure can prolong the retention time of the arc in the arc extinguishing chamber, so that the arc can be extinguished more fully; 2. The gas discharged from the arc extinguishing chamber enters the spacious internal air duct through the narrow air duct, so that the gas undergoes a process of compression and expansion, which is conducive to further extinguishing the arc escaping from the arc extinguishing chamber; 3. The guide plates of the gas guide structure have a combing effect on the gas discharged from the arc extinguishing chamber, eliminating or improving the disordered flow of the gas discharged from the arc extinguishing chamber, and allowing the gas to be discharged from the shell more smoothly.

[0029] In addition, since there are differences in the flow rates of the airflow entering the inner air duct of the arc extinguishing chamber through each air duct, when each airflow flows back to the combing column in the inner air duct, they interact with each other. Without affecting the movement of the airflow, the rate at which the airflow discharges from the shell can be delayed, forming a certain pressure-maintaining space in the shell, allowing as many arc-extinguishing grids as possible to act on the arc cutting, thereby improving the arc voltage and arc extinguishing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a projection view of the A-layer switch unit of the present invention;

[0031] Figure 2 This is an exploded view of the A-layer switch unit of the utility model;

[0032] Figure 3 It is a projection view of the A-layer shell of the utility model;

[0033] Figure 4 This is a projection view of the B-layer switch unit of the present invention;

[0034] Figure 5 This is an exploded view of the B-layer switch unit of the utility model;

[0035] Figure 6 It is a projection view of the B layer shell of the utility model;

[0036] Figure 7 This is a schematic diagram of the relative position relationship of the contact systems of the adjacent A-layer switch units and B-layer switch units of the present invention;

[0037] Figure 8 This is a projection view of the A-layer switch unit of the present invention, showing the arrangement of the arc extinguishing grids of the arc extinguishing chamber;

[0038] Figure 9 This is a schematic diagram of the three-dimensional structure of the A-layer switch unit of the present invention, showing the arrangement of the arc extinguishing grids of the arc extinguishing chamber;

[0039] Figure 10 This is a projection view of the universal switch unit of the utility model;

[0040] Figure 11 This is an exploded view of the universal switch unit of the utility model;

[0041] Figure 12 This is a projection view of the housing of the universal switch unit of the present utility model;

[0042] Figure 13 This is a schematic structural diagram of the contact system of the universal switch unit of the present utility model;

[0043] Figure 14 This is a projection view of the universal switch unit of the present invention, showing the arrangement of the arc extinguishing grids of the arc extinguishing chamber;

[0044] Figure 15 It is a three-dimensional structural diagram of the universal switch unit of the utility model, showing the arrangement of the arc extinguishing grids of the arc extinguishing chamber.

[0045] Description of Reference Numerals

[0046] A-layer switch unit u1; B-layer switch unit u2; universal switch unit u3;

[0047] A shell 1-1; B shell 1-2;

[0048] Front partition plate 1-11f, rear partition plate 1-11b;

[0049] Shell shaft hole 1-12;

[0050] Left arc extinguishing area 1-13l, right arc extinguishing area 1-13r;

[0051] Left air outlet 1-14l, right air outlet 1-14r;

[0052] Left internal airway 1-15l, right internal airway 1-51r;

[0053] Left air guide structure 1-16l, first left guide plate 1-161l, second left guide plate 1-162l, third left guide plate 1-163l, first left auxiliary plate 1-164l, second left auxiliary plate 1-165l, right air guide structure 1-16r, first right guide plate 1-160r, second right guide plate 1-161r, third right guide plate 1-162r, fourth right guide plate 1-163r, first right auxiliary plate 1-165r, second right auxiliary plate 1-166r, third right auxiliary plate 1-167r, fourth right auxiliary plate 1-168r; fifth right auxiliary plate 1-169r;

[0054] Front contact position 1-17f, rear contact position 1-17b;

[0055] Front divider 1-18f, rear divider 1-18b;

[0056] Left side wall 1-19l, right side wall 1-19r, front side wall 1-19f, back side wall 1-19b;

[0057] Left combing column 1-20l, right combing column 1-20r;

[0058] Left arc extinguishing chamber 21; right arc extinguishing chamber 2r; arc extinguishing chute 2-1, arc extinguishing grid 2-2, inner grid 2-21, outer grid 2-22;

[0059] Contact system c;

[0060] Moving contact mechanism 3;

[0061] Front static contact 4f; rear static contact 4b;

[0062] Arc isolation device 5, upper arc isolation device 5h, upper arc isolation wall 5-0h, upper magnetic conductive plate 5-1h, lower arc isolation device 5d, lower arc isolation plate 5-0d, lower magnetic conductive plate 5-1d; DETAILED DESCRIPTION

[0063] The following embodiments are combined with the accompanying drawings to further illustrate the specific implementation of the switch electrical apparatus of the present invention. The switch electrical apparatus of the present invention is not limited to the description of the following embodiments.

[0064] The present invention discloses a switch electrical appliance, which is preferably an isolating switch, specifically a rotary isolating switch. The following is an embodiment of the switch electrical appliance of the present invention.

[0065] like Figure 1-2 As shown in Figures 4-5, 8, 10-11, and 14-15, the switching electrical appliance of the present invention includes an operating mechanism (not shown in the figures) and a switch part. The switch part includes at least one switch unit. The switch unit includes a shell and a contact system c and an arc extinguishing chamber respectively arranged in the shell. The contact system c includes a contact pair that matches the arc extinguishing chamber one-to-one. The contact pair includes a static contact part and a moving contact part that are used in conjunction with each other. The arc extinguishing chamber is used to extinguish the arc generated by the closing and disconnection of the corresponding moving contact part and the static contact part (that is, the closing and disconnection of the contact system c). The operating mechanism drives each moving contact part to move and close and disconnect with the static contact part; one end of the arc extinguishing chamber that matches the contact pair is the arc inlet of the arc extinguishing chamber and the other end is the exhaust port of the arc extinguishing chamber. Furthermore, the contact system c includes a moving contact mechanism 3 and a static contact that are used in conjunction with each other. The moving contact mechanism 3 includes a moving contact portion, and the static contact includes a static contact portion. The operating mechanism is transmission-connected to the moving contact mechanism 3 of each switch unit, driving each moving contact mechanism 3 to move and close and open with the corresponding static contact (i.e., the moving contact portion and the static contact portion close and open). Furthermore, in the switch unit, the moving contact mechanism 3 is rotatably arranged; the operating mechanism and the switch portion are stacked along the direction of the rotating axis of the moving contact mechanism 3 (referred to as the first direction); the switch portion preferably includes two or more switch units, each of which is stacked along the first direction.

[0066] Specifically, such as Figure 1-2As shown in Figures 4-5, 8-9, 10-11, and 14-15, the switch unit includes two sets of arc extinguishing chambers, the contact system c includes two sets of static contacts, the moving contact mechanism 3 includes a moving contact, and the moving contact includes two sets of moving contact portions. The two sets of moving contact portions are preferably arranged at both radial ends of the moving contact mechanism 3. Each set of static contacts includes a static contact portion. The two sets of moving contact portions cooperate with the two sets of static contact portions to form two contact pairs. The two sets of arc extinguishing chambers are respectively arranged on both radial sides of the moving contact mechanism 3 and are used in conjunction with the two sets of contact pairs. Each arc extinguishing chamber is used to extinguish the arc generated by the opening and closing of the corresponding contact pair. In the switch unit, the two sets of static contacts are respectively the front static contact 4f and the rear static contact 4d, and the two sets of arc extinguishing chambers are respectively the left arc extinguishing chamber 2l and the right arc extinguishing chamber 2r. The left arc extinguishing chamber 2l, the rear static contact 4d, the right arc extinguishing chamber 2r, and the front static contact 4f are arranged in sequence around the moving contact mechanism 3. The arc extinguishing chamber includes two arc extinguishing chute plates 2-1 spaced apart from each other and a plurality of arc extinguishing grids 2-2 spaced apart and arranged side by side in a second direction (the second direction is also the direction of movement of the moving contact portion / the extension direction of the moving contact portion's movement trajectory / the rotation direction of the moving contact mechanism 3). Each arc extinguishing grid 2-2 is disposed between the two arc extinguishing chute plates 2-1 and is fixedly connected to the arc extinguishing chute plates 2-1. In the second direction, the two ends of the arc extinguishing chamber are the front end of the arc extinguishing chamber (i.e., the end of the arc extinguishing chamber that cooperates with the corresponding static contact) and the rear end of the arc extinguishing chamber (i.e., the end of the arc extinguishing chamber that cooperates with the moving contact portion that moves to the disconnected position). The moving contact mechanism 3 includes a contact support and a moving contact. The contact support includes a support body into which the moving contact is inserted. The moving contact mechanism 3 is rotatably arranged by the contact support. A moving contact portion is provided at each end of the moving contact. The housing includes a housing shaft hole 1-12 disposed on the bottom wall of the housing for the contact support to rotate therein. The arc extinguishing chamber is a fan-shaped structure in the projection perpendicular to the first direction, and the two arc extinguishing chute plates 2-1 of the arc extinguishing chamber are preferably both fan-shaped structures and symmetrically arranged.

[0067] As another embodiment of the arc extinguishing chamber, the arc extinguishing chamber is not provided with the arc chute 2 - 1 , and each arc extinguishing grid 2 - 2 is fixedly provided on the grid fixing structure of the housing.

[0068] like Figure 1 、 3 As shown in Figures 4, 6, 8-10, 12, and 14-15, the housing further includes two sets of partitions, which are respectively arranged on both radial sides of the housing shaft hole 1-12 and on both radial sides of the movable contact mechanism 3. The two sets of partitions cooperate with the movable contact mechanism 3 (specifically, the contact supports of the movable contact mechanism 3) to divide the interior space of the housing into two subspaces. Specifically, the two partitions are a front partition 1-18f and a rear partition 1-18b.

[0069] like Figure 1 、3 , 4, 6, 10, 12, 14-15, the shell also includes a shell arc extinguishing structure that matches the arc extinguishing chamber one-to-one, the shell arc extinguishing structure includes an arc extinguishing area, an inner air duct, an air guide structure and an air outlet, the inner air duct, the air guide structure and the arc extinguishing area are all arranged in the shell, the arc extinguishing area is used to accommodate the arc extinguishing chamber (that is, the arc extinguishing chamber is arranged in the arc extinguishing area), the air guide structure is used to match with the exhaust port of the arc extinguishing chamber (that is, the air guide structure is relatively matched with the exhaust port of the arc extinguishing chamber), an inner air duct is formed between the air guide structure and the side wall of the shell, the air outlet is arranged on the side wall of the shell and is used to connect the inner air duct with the external environment (that is, the external environment where the switch unit is located); the air guide structure includes at least two guide plates, each guide plate moves along the direction of movement of the corresponding dynamic contact part ( Figure 1 The double-arrow arc line in the middle represents the movement direction of the dynamic contact part) is arranged in sequence, one side of each guide plate faces the side wall of the shell and the other side is used to face the exhaust port of the arc extinguishing chamber arranged in the arc extinguishing area, and air ducts are provided between adjacent guide plates. An air duct is provided between the end of the guide plate close to the contact position adjacent to the contact position and the side wall of the shell, and an air duct is provided at the end of the guide plate close to the disconnection position adjacent to the disconnection position. The air duct is used to connect the internal air duct and the exhaust port of the arc extinguishing chamber, and the gas in the arc extinguishing chamber is discharged into the external environment through the air duct, the internal air duct and the air outlet.

[0070] The gas guide structure, internal gas duct and gas outlet can bring the following benefits: 1. The guide plates of the gas guide structure can extend the retention time of the arc in the arc extinguishing chamber, so that the arc can be extinguished more fully; 2. The gas discharged from the arc extinguishing chamber enters the spacious internal gas duct through the narrow gas duct, so that the gas undergoes a process of compression and expansion, which is conducive to further extinguishing the arc escaping from the arc extinguishing chamber; 3. The guide plates of the gas guide structure have a combing effect on the gas discharged from the arc extinguishing chamber, eliminating or improving the disordered flow of the gas discharged from the arc extinguishing chamber, and allowing the gas to be discharged from the shell more smoothly.

[0071] Furthermore, the housing also includes a contact position for accommodating the static contact part and a disconnection position for accommodating the dynamic contact part that moves to the disconnection position. The contact position is matched one-to-one with the static contact part, and the disconnection position is matched one-to-one with the dynamic contact part. That is, the static contact part is arranged in the corresponding contact position, and the dynamic contact part is located in the disconnection position when it moves to the disconnection position. The contact position and the disconnection position are respectively arranged in correspondence with the two ends of the arc extinguishing area. In other words, the contact position and the disconnection position are respectively arranged in correspondence with the two ends of the arc extinguishing chamber in the arc extinguishing area; the guide plates of the air guide structure are sequentially arranged on one side of the corresponding arc extinguishing area along the direction from the corresponding contact position to the disconnection position. Furthermore, the contact position is arranged outside one end of the corresponding arc extinguishing area, and the disconnection position is arranged at the other end of the corresponding arc extinguishing area.

[0072] Furthermore, the number of guide plates of the air guide structure is m, where m is an integer and is ≥3.

[0073] Further, such as Figure 1 、 4 As shown in Figures 8, 10, and 14-15, the guide plates of the gas guide structure are also used to cooperate with the side edges of the arc-extinguishing chute 2-1 of the corresponding arc-extinguishing chamber to limit the arc-extinguishing chamber in the operating position. Furthermore, each guide plate is spaced apart from the end of the corresponding arc-extinguishing grid 2-2 located within the exhaust port of the arc-extinguishing chamber.

[0074] Furthermore, as shown in 1, 3, 4, 6, 8, 10, 12, and 14-15, the air outlet is disposed between the corresponding contact position and the disconnect position, with the air outlet being disposed closer to the contact position relative to the disconnect position, or closer to the disconnect position relative to the contact position. Furthermore, the direction of the air outlet is perpendicular to the side wall where the air outlet is located. The direction of the air outlet can be adjusted according to actual needs and is not limited to being perpendicular to the side wall where the air outlet is located.

[0075] Specifically, in the switch unit, the housing includes two sets of arc-extinguishing structures disposed radially on opposite sides of the housing's housing axis hole 1-12. The two sets of arc-extinguishing chambers are spaced apart and contained within two oppositely disposed arc-extinguishing regions. When mated with the two contact pairs of the contact system c, the arc inlets of the two sets of arc-extinguishing chambers are positioned opposite each other. One end of each arc-extinguishing chamber is positioned adjacent to the corresponding static contact, and the other end extends to the corresponding disconnected position. Furthermore, the two sets of arc-extinguishing chambers are located radially on opposite sides of the moving contact mechanism 3, and the two sets of housing arc-extinguishing structures are disposed radially on opposite sides of the moving contact mechanism 3. Furthermore, the shell arc extinguishing structure used to cooperate with the left arc extinguishing chamber 2l is the shell left arc extinguishing structure, and the arc extinguishing area, internal air duct, air guiding structure and air outlet of the shell left arc extinguishing structure are respectively the left arc extinguishing area 1-13l, the left internal air duct 1-15l, the left air guiding structure 1-16l and the left air outlet 1-14l; the shell arc extinguishing structure used to cooperate with the right arc extinguishing chamber 2r is the shell right arc extinguishing structure, and the arc extinguishing area, internal air duct, air guiding structure and air outlet of the shell right arc extinguishing structure are respectively the right arc extinguishing area 1-13r, the right internal air duct 1-15r, the right air guiding structure 1-16r and the right air outlet 1-14r. The contact position and disconnection position corresponding to the two ends of the left arc extinguishing area 1-13l are respectively the rear contact position 1-17b and the front disconnection position, and the rear contact position 1-17b is located in the left arc extinguishing area 1-13l The front disconnect position is arranged on the outside of one end of the left arc extinguishing area 1-13l, and the contact position and disconnect position corresponding to the right arc extinguishing area 1-13r are the front contact position 1-17f and the rear disconnect position respectively. The front contact position 1-17f is located on the outside of one end of the right arc extinguishing area 1-13r and the rear disconnect position is arranged on the other end of the right arc extinguishing area 1-13r. The rear contact position 1-17b, the rear disconnect position, the front contact position 1-17f and the front disconnect position are arranged in sequence around the moving contact mechanism 3. The rear contact position 1-17b and the rear disconnect position are arranged on one radial side of the moving contact mechanism 3 and the front contact position 1-17f and the front disconnect position are arranged on the other radial side of the moving contact mechanism 3. The rear contact position 1-17b is used to accommodate the static contact part of the rear static contact 4b, and the front contact position 1-17f is used to accommodate the static contact part of the front static contact 4f. Furthermore, the front contact position 1-17f is adjacent to the front partition 1-18f, the rear contact position 1-17b is adjacent to the rear partition 1-18f, and the contact position, partition, and arc extinguishing area are arranged in turn around the moving contact mechanism 3 / shell shaft hole 1-12, that is, the front contact position 1-17f, the front partition 1-18f, the left arc extinguishing area 1-13l, the rear contact position 1-17b, the rear partition 1-18b, and the right arc extinguishing area 1-13r are arranged in turn around the moving contact mechanism 3 / shell shaft hole 1-12.

[0076] Furthermore, the shell includes four shell side walls, which are respectively a left side wall 1-19l and a right side wall 1-19r arranged relatively at intervals, and a rear side wall 1-19b and a front side wall 1-19f arranged relatively at intervals. The left side wall 1-19l, the rear side wall 1-19b, the right side wall 1-19r, and the front side wall 1-19f are connected end to end in sequence and form four shell inner corners. The shell bottom wall is respectively connected to the left side wall 1-19l, the rear side wall 1-19b, the right side wall 1-19r, and the front side wall 1-19f; the rear contact position 1-17b and the rear disconnect position are located between the rear side wall 1-19b and the shell shaft hole 1-12, the front contact position 1-17f and the front disconnect position are located between the front side wall 1-19f and the shell shaft hole 1-12, and the left arc extinguishing chamber 2l, the shell shaft hole 1-12, and the right arc extinguishing chamber 2r are arranged in sequence on the left side wall 1-19l and Between the right side wall 1-19r, the left arc extinguishing chamber 2l, the moving contact mechanism 3, and the right arc extinguishing chamber 2r are arranged in sequence between the left side wall 1-19l and the right side wall 1-19r. In the second direction, the two ends of the arc extinguishing chamber (i.e., the front end of the arc extinguishing chamber and the rear end of the arc extinguishing chamber) are respectively arranged close to the front side wall 1-19f and the rear side wall 1-19b. Specifically, the front end of the arc extinguishing chamber and the rear end of the arc extinguishing chamber of the left arc extinguishing chamber 2l are respectively arranged close to the rear side wall 1-19b and the front side wall 1-19f, and the front end of the arc extinguishing chamber and the rear end of the arc extinguishing chamber of the left arc extinguishing chamber 2l are also respectively arranged close to the rear contact position 1-17b and the front partition 1-18f, and the front end of the arc extinguishing chamber and the rear end of the arc extinguishing chamber of the right arc extinguishing chamber 2r are respectively arranged close to the front side wall 1-19f and the rear side wall 1-19b, and the front end of the arc extinguishing chamber and the rear end of the arc extinguishing chamber of the right arc extinguishing chamber 2r are also respectively arranged close to the front contact position 1-17f and the rear partition 1-18b.

[0077] like Figure 1 、 3 As shown in , 4, 6, 8-10, 12, and 14-15, the housing further includes a combing column disposed within the inner air passage and cooperating one-to-one with the air outlet. The combing column is located on the inner end side of the corresponding air outlet and is disposed opposite thereto. The airflows entering the arc extinguishing chamber through the various air passages have different flow rates. When the various airflows flow back to the combing columns within the inner air passage, they interact with each other. Without affecting the movement of the airflow, the rate at which the airflow exits the housing is delayed, forming a certain pressure-maintaining space within the housing, allowing as many arc-extinguishing grids as possible to act on the arc cutting, thereby improving arc pressure and arc extinguishing efficiency.

[0078] Furthermore, the combing column is an n-prism, where n is an integer and ≥3. The airflow from the internal airway converging to the combing column will be broken up by the edges of the combing column, further curbing the rate at which the airflow is discharged from the shell through the air outlet, thereby extending the pressure holding time in the shell. Furthermore, n is an even number, and the line connecting the edge of the combing column opposite to the inner end of the corresponding air outlet and the opposite edge of the edge is parallel to the direction of the air outlet; for example: the combing column is a rhombus-shaped column, one of its edges is opposite to the inner end of the corresponding air outlet, and the line connecting the edge and the opposite edge is parallel to the direction of the air outlet; or, the combing column is a regular square prism; or, the combing column is a regular hexagonal column.

[0079] Furthermore, each corner of the combing column is rounded or chamfered.

[0080] As another embodiment of the carding cylinder, the carding cylinder is a cylinder.

[0081] Specifically, in the switch unit, a combing column is provided in each of the left inner air duct 1-15l and the right inner air duct 1-15r, namely a left combing column 1-20l and a right combing column 1-20r. The left combing column 1-20l is arranged opposite to the inner end of the left air outlet 1-14l, and the right combing column 1-20r is arranged opposite to the inner end of the right air outlet 1-14r. The left combing column 1-20l is located at the inner corner of the shell formed by the left side wall 1-19l and the rear side wall 1-19b, and the right combing column 1-20r is located at the inner corner of the shell formed by the right side wall 1-19r and the rear side wall 1-19b.

[0082] like Figure 8-9 , 14-15, the following is an embodiment of the arc extinguishing chamber.

[0083] like Figure 8-9As shown in Figures 14-15, among at least some of the arc-extinguishing grids 2-2 of the arc-extinguishing chamber, some of the arc-extinguishing grids 2-2 serve as inner grids 2-21, and other parts of the arc-extinguishing grids 2-2 serve as outer grids 2-22. At least one outer grid 2-22 is provided between adjacent inner grids 2-21, and the outer grids 2-22 are offset relative to the inner grids 2-21 in a direction away from the motion trajectory of the moving contact portion (in other words, the inner grid 2-21 is closer to the motion trajectory of the moving contact portion relative to the outer grid 2-22), that is, the outer grid 2-22 is offset relative to the inner grid 2-21 toward the side where the exhaust port of the arc-extinguishing chamber is located. The arrangement of the inner grids 2-21 and outer grids 2-22 can bring the following benefits: 1. It is conducive to reducing the resistance of the arc entering the arc extinguishing chamber, improving the efficiency of the arc entering the arc extinguishing chamber, and thus improving the arc extinguishing efficiency; 2. It can allow the arc extinguishing chamber to be loaded with a larger number of arc extinguishing grids 2-2 without increasing or significantly increasing the resistance of the arc entering the arc extinguishing chamber, thereby further improving the arc extinguishing performance of the arc extinguishing chamber. Furthermore, the inner grids 2-21 and outer grids 2-22 are arranged alternately in sequence. Furthermore, among all the arc extinguishing grids 2-2 in the arc extinguishing chamber, some of the arc extinguishing grids 2-2 serve as inner grids 2-21 and other parts of the arc extinguishing grids 2-2 serve as outer grids 2-22.

[0084] Further, such as Figure 8-9 As shown in Figures 14-15, in the arc extinguishing chamber, the arc extinguishing grids 2-2 are radially arranged around the movable contact mechanism 3 / the housing shaft hole 1-12 / the first axis (i.e., the rotation axis of the movable contact mechanism 3 / the axis of the housing shaft hole 1-12). All the arc extinguishing grids 2-2 in the arc extinguishing chamber are formed into an arc-shaped structure.

[0085] As another embodiment of the arrangement of the arc-quenching grids 2-2 of the arc-quenching chamber, when the arc-quenching chamber is used in other types of switching devices (such as circuit breakers and contactors), the arc-quenching grids 2-2 are arranged in a straight line. Specifically, the inner grids 2-21 are positioned entirely along a straight path, and the outer grids 2-22 are positioned entirely along a straight path, with the two straight paths being parallel to each other. Accordingly, the gas guide structure can also be adaptively adjusted, that is, the guide plates are also arranged along a straight path and are positioned opposite the exhaust port of the arc-quenching chamber.

[0086] Furthermore, the angle between adjacent arc-extinguishing grids 2 - 2 of the arc-extinguishing chamber is α, 0°≤α≤5°, which ensures the compactness of the arc-extinguishing grid layout and effectively controls the space required for the arc-extinguishing chamber.

[0087] Furthermore, the minimum distance between adjacent arc-extinguishing grids of the arc-extinguishing chamber is L1, 0.6 mm ≤ L1 ≤ 1.0 mm, to ensure the compactness of the arc-extinguishing grid layout and to ensure that the arc smoothly enters between the arc-extinguishing grids.

[0088] Furthermore, the minimum distance between adjacent outer grids 2-22 of the arc extinguishing chamber is L3, 1.5mm≤L3≤2.5mm, to ensure the compactness of the arc extinguishing grid layout and to ensure that the arc smoothly enters between the arc extinguishing grids.

[0089] Furthermore, the exhaust port of the arc extinguishing chamber is an arc-shaped structure, and each guide plate of the gas guide structure is arranged around the corresponding arc extinguishing chamber, and each guide plate of the gas guide structure is also arranged around the corresponding arc extinguishing area for accommodating the arc extinguishing chamber. Specifically, the left guide plate of the left gas guide structure 1-16l is arranged around the left arc extinguishing chamber 2l, and the left gas guide structure 1-16l is also arranged around the left arc extinguishing area 1-13l for accommodating the left arc extinguishing chamber 2l. The right guide plate of the right gas guide structure 1-16r is arranged around the right arc extinguishing chamber 2r, and the right gas guide structure 1-16r is also arranged around the right arc extinguishing area 1-13r for accommodating the right arc extinguishing chamber 2r. The guide plates of the left gas guide structure 1-16l and the right gas guide structure 1-16r are also arranged around the moving contact mechanism 3 / housing shaft hole 1-12.

[0090] Furthermore, the side of the guide plate of the air-guiding structure facing the exhaust port of the arc-extinguishing chamber abuts against the side edge of the arc-extinguishing chute 2-1 to limit the arc-extinguishing chamber in the operating position. The end of each arc-extinguishing grid 2-2 located within the exhaust port of the arc-extinguishing chamber is spaced apart from the corresponding guide plate. Furthermore, the minimum spacing between each arc-extinguishing grid 2-2 and the corresponding guide plate is L2, where L2 is ≥ 0.8 mm. Furthermore, each guide plate is an arc-shaped plate, with the axis of the arc plate being the first axis. The side edge of each arc-extinguishing chute 2-1 opposite the guide plate structure is an arc-shaped side edge, with the axis of the arc-shaped side edge being the first axis. The shape of each guide plate matches the shape of the arc-shaped side edge of the corresponding arc-extinguishing chute 2-1. Specifically, the arc chute 2-1 is a sector-shaped plate, comprising an inner and outer arc-shaped edge disposed opposite each other. The radius of the inner edge is smaller than the radius of the outer edge, and the axes of both the inner and outer edges are the first axis. The inner edge is positioned proximate to the arc inlet of the arc extinguishing chamber, and the outer edge is positioned proximate to the exhaust port of the arc extinguishing chamber. As another embodiment of the mating relationship between the guide plate and the arc chute 2-1, the guide plate is not a curved plate, but rather the side of the guide plate facing the arc chute 2-1 is a curved side surface, the axis of the curved side surface being the first axis. The curved side surface of the guide plate matches the shape of the curved side edge of the arc chute 2-1, and the two are mutually restrained and engaged.

[0091] like Figure 1-2As shown in Figures 4-5, 8-11, and 14-15, the switch unit further includes an arc isolation device 5, which includes an upper arc isolation device 5h and a lower arc isolation device 5d. The upper arc isolation device 5h includes an upper arc isolation wall 5-0h, and the lower arc isolation device 5d includes a lower arc isolation wall 5-0d. The upper arc isolation wall 5-0h and the lower arc isolation wall 5-0d are spaced relative to each other in a direction perpendicular to the movement plane of the moving contact portion to form a contact gap. The contact gap is respectively matched one-to-one with the contact pair and the arc extinguishing chamber of the contact system c. One end of the contact gap is connected to the arc inlet of the corresponding arc extinguishing chamber. The moving contact portion moves within the contact gap to close and open with the corresponding static contact portion. The contact gap formed by the arc isolation device 5 prevents the arc generated by the opening and closing of the contact pair from overflowing, ensuring that all or most of the arc enters the arc extinguishing chamber and is extinguished. Furthermore, in a direction perpendicular to the plane of motion of the moving contact portion, the width of the contact gap is less than the height of the gap between adjacent arc-extinguishing grids, thereby facilitating the transfer of the arc from the contact gap into the arc-extinguishing chamber, thereby improving arc extinguishing efficiency. Furthermore, at least one of the upper arc-isolating wall 5-0h and the lower arc-isolating wall 5-0d is made of a gas-generating material. The arc burns the arc-isolating wall to generate gas, which further accelerates the transfer of the arc into the arc-extinguishing chamber.

[0092] Furthermore, the upper arc-isolating device 5h also includes an upper magnetic plate 5-1h disposed on the upper arc-isolating wall 5-0h, and the lower arc-isolating device 5d includes a lower magnetic plate 5-1d disposed on the lower arc-isolating wall 5-0d. The upper magnetic plate 5-1h and the lower magnetic plate 5-1d are arranged opposite each other in a direction perpendicular to the motion plane of the moving contact portion, located on either side of the upper arc-isolating wall 5-0h and the lower arc-isolating wall 5-1h, respectively, and surround the motion trajectory of the moving contact portion from both sides. The upper magnetic plate 5-1h and the lower magnetic plate 5-1d are both made of magnetic material, which helps accelerate the transfer of the arc into the arc-extinguishing chamber. The upper magnetic plate 5-1h and the lower magnetic plate 5-1d can be locally reinforced in the moving area according to the movement of the arc. Furthermore, the arc-isolating device 5 of this embodiment can also be provided without the upper magnetic plate 5-1h and the lower magnetic plate 5-1d.

[0093] Specifically, the upper arc-isolating wall 5-0h and the lower arc-isolating wall 5-0d are arranged relative to each other along a first direction (i.e., a direction perpendicular to the plane of motion of the moving contact portion), forming two contact gaps located on either side of the moving contact mechanism 3 in the radial direction. These gaps respectively cooperate with the two contact pairs of the contact system c and the two arc-extinguishing chambers. In the first direction, the width of the contact gap is less than the height of the gap between adjacent arc-extinguishing grids. The upper arc-isolating wall 5-0h and the lower arc-isolating wall 5-0d are both circular plate-shaped structures and are provided with an arc-isolating wall shaft hole in the middle. The arc-isolating wall shaft hole allows external force to pass through and be applied to the moving contact mechanism 3. The upper arc-isolating wall 5-0h and the lower arc-isolating wall 5-0d are both circular ring-shaped structures. The outer edges of the upper arc-isolating wall 5-0h and the lower arc-isolating wall 5-0d are respectively overlapped with or abutted against the side edges of the two arc-extinguishing diaphragms 2-1 of the arc-extinguishing chamber, and the inner edges of the upper arc-isolating wall 5-0h and the lower arc-isolating wall 5-0d are respectively overlapped with the radial ends of the supporting body of the contact support. The upper magnetic conductive plate 5-1h and the lower magnetic conductive plate 5-1d are arranged relative to each other along a first direction and are respectively located on both sides of the upper arc-isolating wall 5-0h and the lower arc-isolating wall 5-0d in the first direction. The upper magnetic conductive plate 5-1h and the lower magnetic conductive plate 5-1d are preferably fan-shaped plates that adapt to the arc-shaped motion trajectory of the corresponding moving contact part and surround the motion trajectory of the corresponding moving contact part from both sides.

[0094] like Figure 1-9 FIG. 1 is an embodiment of the switch portion.

[0095] Among the switch units of the switch portion of this embodiment, one part is the A-layer switch unit u1, and the other part is the B-layer switch unit u2. The structures of the A-layer switch unit u1 and the B-layer switch unit u2 are different and are arranged alternately in sequence along the first direction; the shell of the A-layer switch unit u1 is the A-layer shell 1-1, and the shell of the B-layer switch unit is the B-layer shell 1-2. The contact system c of the A-layer switch unit u1 is the A-layer contact system, and the contact system c of the B-layer switch unit u2 is the B-layer contact system.

[0096] like Figure 1-2, 4-5, and 7-9, the differences between the A-layer switch unit and the B-layer switch unit mainly lie in: the structural differences between the A-layer contact system and the B-layer contact system and the corresponding structural changes of the shell. Specifically, the structures of the moving contact mechanism 3 and the rear static contact 4b of the A-layer contact system and the B-layer contact system are the same. On the projection of the switch portion perpendicular to the first direction, the moving contact mechanism 3 and the rear static contact 4b of the A-layer contact system overlap with the moving contact mechanism 3 and the rear static contact 4b of the B-layer contact system respectively. The structures of the front static contact 4f of the A-layer contact system and the B-layer contact system are different. On the projection of the switch portion perpendicular to the first direction, the front static contact 4f of the A-layer contact system and the B-layer contact system are the A-layer front static contact and the B-layer front static contact respectively. The A-layer front static contact The static contact parts of the contact and the front static contact of the B layer completely overlap or the static contact parts used to cooperate with the dynamic contact parts overlap. The terminal ends of the front static contact 4f of the A layer front static contact and the B layer front static contact are staggered and arranged side by side. Specifically, the A layer front static contact and the B layer front static contact are both Z-shaped structures, including static contact parts, static contact connecting parts and terminal ends that are bent and connected in sequence. One end of the static contact connecting part of the A layer static contact is bent and connected to the corresponding static contact part, and one end of the static contact connecting part of the B layer static contact is bent and connected to the corresponding static contact part. The other end of the connecting part of the A layer static contact and the connecting part of the B layer static contact extend in opposite directions respectively. This structural setting is conducive to improving the insulation distance and creepage clearance of the terminal ends of the A layer static contact and the B layer static contact. Furthermore, the front side wall 1-19f of the shell includes a front inner wall 1-191f and a front outer wall 1-192f that are relatively spaced apart, and a connection portion receiving groove for accommodating the static contact connection portion of the front static contact 4f is provided between the front inner wall 1-191f and the front outer wall 1-192f, and one end of the connection portion receiving groove is connected to the front contact position 1-17f. On the projection of the switch portion perpendicular to the first direction, one end of the connection portion receiving grooves of the A layer shell 1-1 and the B layer shell 1-2 overlap or partially overlap and the other ends extend in two opposite directions respectively.

[0097] like Figure 1-3 As shown in 8-9, in the A-layer switch unit u1, the left air outlet 1-14l is arranged on the rear side wall 1-19b, and the left air outlet 1-14l is arranged close to the inner corner of the shell formed by the rear side wall 1-19b and the left side wall 1-19l, and the right air outlet 1-14r is arranged on the right side wall 1-19r, and the right air outlet 1-14r is arranged close to the inner corner of the shell formed by the right side wall 1-19r and the rear side wall 1-19b; Figure 4-6As shown, in the B-layer switch unit u2, the left air outlet 1-14l is disposed on the left side wall 1-14l, near the inner corner of the housing formed by the left side wall 1-19l and the rear side wall 1-19b. The right air outlet 1-14r is disposed on the rear side wall 1-19b, near the inner corner of the housing formed by the rear side wall 1-19b and the right side wall 1-19r. Furthermore, in the adjacent A-layer switch unit u1 and B-layer switch unit u2, the two left air outlets 1-14l have different orientations, preferably perpendicular to each other, and the two right air outlets 1-14r have different orientations, preferably perpendicular to each other. In the adjacent A-layer switch unit u1 and B-layer switch unit u2, the two left air outlets 1-14l are staggered and have different directions, and the two right air outlets 1-14r are staggered and have different directions, which is conducive to further improving the insulation distance and creepage clearance between the A-layer switch unit u1 and the B-layer switch unit u2.

[0098] like Figure 1 、 3, as shown in FIGS. 8-9, is an embodiment of the left air guiding structure 1-16l and the left carding column 1-20l of the A-layer switch unit u1: The left air guiding structure 1-16l includes a first left guide plate 1-161l, a second left guide plate 1-162l, and a third left guide plate 1-163l that are arranged in sequence around the corresponding arc extinguishing chamber (left arc extinguishing chamber 2l) and along the direction from the rear contact position 1-17b to the front disconnection position. Each left guide plate is an arc-shaped plate, and all the left guide plates form an arc-shaped structure as a whole. Air channels are provided between adjacent left guide plates. The first left guide plate 1-161l is arranged close to the rear contact position 1-17b, and the first left guide plate 1-161l is also close to the rear side wall 1-19b and the front end of the arc extinguishing chamber of the left arc extinguishing chamber 2l. The third left guide plate 1-163l is arranged close to the front disconnection position, and the third left guide plate 1-163l is also close to the front side wall 1-19f and the rear end of the arc extinguishing chamber of the left arc extinguishing chamber 2l. An air channel is provided between one end of the first left guide plate 1-161l close to the rear contact position 1-17b (which is also one end of the first left guide plate 1-161l close to the front end of the arc extinguishing chamber of the left arc extinguishing chamber 2l) and the side wall of the housing (specifically, the rear side wall 1-19b). An air channel is provided between one end of the third left guide plate 1-163l close to the front disconnection position (which is also one end of the third left guide plate 1-163l close to the rear end of the arc extinguishing chamber of the left arc extinguishing chamber 2l) and the side wall of the housing (specifically, the front side wall 1-19f). Each air channel is connected to the left inner air channel 1-15l. Further, the left air guiding structure 1-16l further includes a first left auxiliary plate 1-164l and a second left auxiliary plate 1-165l. One end of the first left auxiliary plate 1-164l is connected to the middle of the first left guide plate 1-161l, and the other end (denoted as the free end of the first left auxiliary plate 1-164l) extends into the left inner air channel 1-15l and extends towards the left air outlet 1-14l. The first left auxiliary plate 1-164l and the first left guide plate 1-161l form a "丄" - shaped structure as a whole. One end of the second left auxiliary plate 1-165l (denoted as the inner end of the second left auxiliary plate 1-165l) extends into the air channel between the first left guide plate 1-161l and the second left guide plate 1-162l, and the other end (denoted as the outer end of the second left auxiliary plate 1-165l) extends towards the free end of the first left auxiliary plate 1-164l. The outer end of the second left auxiliary plate 1-165l extends into the left inner air channel 1-15l. The inner end of the second left auxiliary plate 1-165l is preferably in abutting and limiting fit with the side edge of the arc extinguishing partition 2-1 of the corresponding arc extinguishing chamber (i.e., the left arc extinguishing chamber 2l). The outer end of the second left auxiliary plate 1-165l is relatively spaced from the free end of the first left auxiliary plate 1-164l, and the gap between the two faces the left carding column 1-20l.Furthermore, the left combing column 1-20l is a diamond column, the line connecting a pair of its edges is parallel to the direction of the left air outlet 1-14l and perpendicular to the rear side wall 1-19b, and the line connecting the other pair of edges is parallel to the rear side wall 1-19b. The second left auxiliary plate 1-165l includes the lower side of the second left auxiliary plate and the upper side of the second left auxiliary plate. The lower side of the second left auxiliary plate and the upper side of the second left auxiliary plate are bent and connected and form a V-shaped structure as a whole. The opening of the V-shaped structure faces the exhaust port of the corresponding arc extinguishing chamber (left arc extinguishing chamber 2l). One end of the lower side of the second left auxiliary plate is connected to the second left guide plate 1-162l and the other end is bent and connected to one end of the upper side of the second left auxiliary plate. The other end of the upper side of the second left auxiliary plate extends to the free end of the first left auxiliary plate 1-164l. The upper side of the second left auxiliary plate is located between the left combing column 1-20l and the first left guide plate 1-161l. The upper side of the second left auxiliary plate is arranged parallel to one side of the left combing column 1-20l.

[0099] like Figure 1 、 38-9 shows an embodiment of the right air guide structure 1-16r and the right combing column 1-20r of the A-layer switch unit u1: the right air guide structure 1-16r includes a first right guide plate 1-160r, a second right guide plate 1-161r, a third right guide plate 1-162r, and a fourth right guide plate 1-163r which are arranged around the right arc extinguishing chamber 2r and in sequence from the front contact position 1-17f to the rear disconnection position. Each right guide plate is an arc-shaped plate structure and all right guide plates are integrally formed into an arc-shaped structure. The first right guide plate 1-160r is arranged close to the front contact position 1-17f. The first right guide plate 1-160r is also arranged close to the front side wall 1-19f and the front end of the arc extinguishing chamber of the right arc extinguishing chamber 2r. The fourth right guide plate 1-163r It is arranged close to the rear disconnection position, and the fourth right guide plate 1-163r is also arranged close to the rear side wall 1-19b and the rear end of the arc extinguishing chamber of the right arc extinguishing chamber 2r. An air duct is provided between one end of the first right guide plate 1-160r close to the front contact position 1-17f (which is also the end of the first right guide plate 1-160r close to the front end of the arc extinguishing chamber of the right arc extinguishing chamber 2r) and the side wall (front side wall 1-19f) of the shell. An air duct is provided between one end of the fourth right guide plate 1-163r close to the rear disconnection position (which is also the end of the fourth right guide plate 1-163r close to the rear end of the arc extinguishing chamber of the right arc extinguishing chamber 2r) and the side wall (rear side wall 1-19b) of the shell. An air duct is provided between each adjacent right guide plate, and each air duct is connected to the right inner air duct 1-15r.Furthermore, the right air guide structure 1-16r also includes a first right auxiliary plate 1-165r, a second right auxiliary plate 1-166r and a third right auxiliary plate 1-167r, one end of the first right auxiliary plate 1-165r is connected to the end of the first right guide plate 1-160r close to the second right guide plate 1-161r and the other end (referred to as the free end of the first right auxiliary plate 1-165r) is extended to the gap between the second right guide plate 1-161r and the right side wall 1-19r (that is, the right inner air duct 1-15r is located at The first right auxiliary plate 1-165r extends into the right inner airway 1-15r, and one end of the second right auxiliary plate 1-166r (recorded as the inner end of the second right auxiliary plate 1-166r) is inserted into the airway between the third right guide plate 1-162r and the fourth right guide plate 1-163r, and the other end (recorded as the outer end of the second right auxiliary plate 1-166r) is extended into the gap between the fourth right guide plate 1-163r and the right side wall 1-19r (i.e., the right inner airway 1-15r The portion located on one side of the fourth right guide plate 1-163r extends, the inner end of the second right auxiliary plate 1-166r is preferably matched with the side edge of the arc extinguishing partition 2-1 of the corresponding arc extinguishing chamber (right arc extinguishing chamber 2r), the outer end of the second right auxiliary plate 1-166r extends into the right inner air duct 1-15r and is spaced apart from the right side wall 1-19r, the second right auxiliary plate 1-166r is spaced apart from the right side wall 1-19r as a whole, and one end of the third right auxiliary plate 1-167r is close to the fourth right guide plate 1-163r. One end near the rear disconnection position is bent and connected, and the other end (recorded as the free end of the third right auxiliary plate 1-167r) extends to the gap between the right combing column 1-20r and the rear side wall 1-19b. The fourth right guide plate 1-163r and the third right auxiliary plate 1-167r are in a V-shaped structure as a whole. The opening of the V-shaped structure faces the right side wall 1-19r. The gap between the outer end of the second right auxiliary plate 1-166r and the free end of the third right auxiliary plate 1-167r is opposite to the corresponding combing column (right combing column 1-20r). Furthermore, the right combing column 1-20r is a diamond column, and the line connecting one pair of its edges is parallel to the direction of the right outlet 1-14r and perpendicular to the right side wall 1-19r, and the line connecting the other pair of edges is parallel to the right side wall 1-19r and perpendicular to the rear side wall 1-19b.

[0100] Figure 4-6 An embodiment of the left air guide structure 1-16l and the left combing column 1-20l, and an embodiment of the right air guide structure 1-16r and the right combing column 1-20r of the B-layer switch unit u2 are shown; the left air guide structure 1-16l, the left combing column 1-20l, the right air guide structure 1-16r, and the right combing column 1-20r of the B-layer switch unit u2 and the A-layer switch unit u1 preferably have the same structure.

[0101] like Figure 1 、 3-4, 6, 8-9, in the switch part of this embodiment, each switch unit includes a rear phase partition plate 1-11b, which is arranged on the outer side surface of the shell (the outer side surface of the rear side wall 1-19b) and is used to separate the connection terminals of the rear static contacts 4b of adjacent switch units.

[0102] like Figure 10-15 FIG. 2 shows another embodiment of the switch portion.

[0103] like Figure 10-15 As shown, in the switch portion of this embodiment, the structures of the switch units are the same, and each switch unit is recorded as a universal switch unit u3. In the contact system c of the universal switch unit u3, the front static contact 4f and the rear static contact 4b are centrally symmetrical structures with the rotation axis of the moving contact mechanism 3 as the central symmetry axis; on the projection of the switch portion perpendicular to the first direction, the contact systems c of each universal switch unit u3 overlap.

[0104] like Figure 10-12 As shown in , , 14-15, in the switch portion of this embodiment, the shells of the universal switch units u3 have the same structure; on the projection of the switch portion perpendicular to the first direction, the shells of the universal switch units u3 overlap. Further, the shells of the universal switch units u3 are symmetrical structures with the rotation axis of the moving contact mechanism 3 as the central symmetry axis. Further, the static contact includes a static contact portion, a static contact connecting portion and a terminal connected in sequence, the static contact portion, the static contact connecting portion and the terminal are all plate-like structures, the static contact portion and the static contact connecting portion are coplanar, and the plane where the static contact connecting portion is located is perpendicular to the plane where the terminal is located. Further, the static contact portion and the static contact connecting portion are integrally formed into a straight plate-shaped structure.

[0105] The number of parts of the universal switch unit u3 itself is reduced, which is beneficial to reducing the number of parts of the switch electrical appliance and simplifying the overall structure of the switch electrical appliance.

[0106] like Figure 10 、 12 As shown in Figures 14-15, in the universal switch unit u3, the left air outlet 1-14l and the right air outlet 1-14r are respectively arranged corresponding to a pair of vertex corners of the shell, that is, the left air outlet 1-14l and the right air outlet 1-14r can be respectively arranged at the vertices of a pair of vertex corners of the shell, or the left air outlet 1-14l and the right air outlet 1-14r are respectively arranged close to a pair of vertex corners of the shell.

[0107] Furthermore, the left air outlet 1-14l and the right air outlet 1-14r are respectively arranged on a pair of side walls of the shell (specifically the left side wall 1-19l and the right side wall 1-19r), and the two are parallel in direction. Furthermore, the left air outlet 1-14l and the right air outlet 1-14r are centrally symmetrical structures with the rotation axis of the moving contact mechanism 3 as the central symmetry axis. As other embodiments, the left air outlet 1-14l and the right air outlet 1-14r can also be respectively arranged on the front side wall 1-19f and the rear side wall 1-19b; or, the left air outlet 1-14l can be selectively arranged on the left side wall 1-19f, the rear side wall 1-19b or the front side wall 1-19f, and the right air outlet 1-14r can be selectively arranged on the right side wall 1-19r, the rear side wall 1-19b or the front side wall 1-19f.

[0108] like Figure 10 、 12 As shown in 14-15, in the universal switch unit u3, there are two groups of arc extinguishing areas - left arc extinguishing area 1-13l and right arc extinguishing area 1-13r, two groups of gas guide structures - left gas guide structure 1-16l and right gas guide structure 1-16r, two groups of internal air ducts - left internal air duct 1-15l and right internal air duct 1-15r, two groups of contact positions - front contact position 1-17f and rear contact position 1-17b, two groups of disconnection positions - front disconnection position and rear disconnection, two groups of partitions - front partition 1-18f and rear partition 1-18b, two groups of air outlets - left air outlet 1-14l and right air outlet 1-14r, two groups of arc extinguishing chambers - left arc extinguishing chamber 2l and right arc extinguishing chamber Chamber 2r, all are centrally symmetrical structures with the rotation axis of the moving contact mechanism 3 (i.e., the axis of the shell shaft hole 1-12) as the central symmetry axis; that is, in the universal switch unit 3, two groups of shell arc extinguishing structures-the left arc extinguishing structure of the shell and the right arc extinguishing structure of the shell, two groups of contact positions-the front contact position 1-17f and the rear contact position 1-17b, two groups of disconnection positions-the front disconnection position and the rear disconnection, two groups of partitions-the front partition 1-18f and the rear partition 1-18b, and two groups of arc extinguishing chambers-the left arc extinguishing chamber 2l and the right arc extinguishing chamber 2r, all are centrally symmetrical structures with the rotation axis of the moving contact mechanism 3 (i.e., the axis of the shell shaft hole 1-12) as the central symmetry axis.

[0109] Furthermore, the shell of the universal switch unit u3 is a centrally symmetrical structure with the axis of the shell shaft hole 1-12 as the central symmetry axis.

[0110] The following is an embodiment of the left air guiding structure 1-16l and the left carding column 1-20l of the general switch unit u3: The left air guiding structure 1-16l includes a first left guide plate 1-161l, a second left guide plate 1-162l, and a third left guide plate 1-163l that are arranged in sequence around the corresponding arc extinguishing chamber (left arc extinguishing chamber 1-20l) along the direction from the rear contact position 1-17b to the front disconnection position (which is also the movement direction of the moving contact part). That is, each left guide plate is arranged around the left arc extinguishing chamber 1-20l (and also around the left arc extinguishing area 1-13l). Each left guide plate is an arc-shaped plate, and an air passage is provided between adjacent left guide plates. The first left guide plate 1-161l is arranged close to the rear contact position 1-17b, and the first left guide plate 1-161l is also close to the rear side wall 1-19b and the front end of the arc extinguishing chamber of the left arc extinguishing chamber 2l. The third left guide plate 1-163l is arranged close to the front disconnection position, and the third left guide plate 1-163l is also close to the front side wall 1-19f and the rear end of the arc extinguishing chamber of the left arc extinguishing chamber 2l. An air passage is provided between one end of the first left guide plate 1-161l close to the rear contact position 1-17b (which is also one end of the first left guide plate 1-161l close to the front end of the arc extinguishing chamber of the left arc extinguishing chamber 2l) and the side wall of the housing (specifically the rear side wall 1-19b). An air passage is provided between one end of the third left guide plate 1-163l close to the front disconnection position (which is also one end of the first left guide plate 1-163l close to the rear end of the arc extinguishing chamber of the left arc extinguishing chamber 2l) and the side wall of the housing (specifically the front side wall 1-19f). Each air passage is connected to the left inner air passage 1-15l. Further, the left air guiding structure 1-16l further includes a first left auxiliary plate 1-164l and a second left auxiliary plate 1-165l. One end of the first left auxiliary plate 1-164l is connected to the middle of the first left guide plate 1-161l, and the other end (denoted as the free end of the first left auxiliary plate 1-164l) extends towards the left air outlet 1-14l. The free end of the first left auxiliary plate 1-164l extends into the left inner air passage 1-15l. The first left auxiliary plate 1-164l and the first left guide plate 1-161l form a "丄" shaped structure as a whole. One end of the second left auxiliary plate 1-165l (denoted as the inner end of the second left auxiliary plate 1-165l) extends into the air passage between the first left guide plate 1-161l and the second left guide plate 1-162l, and the other end (denoted as the outer end of the second left auxiliary plate 1-165l) extends towards the free end of the first left auxiliary plate 1-164l. The second left auxiliary plate 1-165l extends into the left inner air passage 1-15l. The inner end of the second left auxiliary plate 1-165l is preferably in abutting and limiting fit with the side edge of the arc extinguishing partition 2-1 of the corresponding arc extinguishing chamber (left arc extinguishing chamber 2l). The outer end of the second left auxiliary plate 1-165l is relatively spaced from the free end of the first left auxiliary plate 1-164l, and the gap between the two faces towards the left carding column 1-20l.Furthermore, the left combing column 1-20l is a diamond column, the line connecting a pair of its edges is parallel to the direction of the left air outlet 1-14l and perpendicular to the rear side wall 1-19b, and the line connecting the other pair of edges is parallel to the rear side wall 1-19b. The second left auxiliary plate 1-165l includes the lower side of the second left auxiliary plate and the upper side of the second left auxiliary plate. The lower side of the second left auxiliary plate and the upper side of the second left auxiliary plate are bent and connected and form a V-shaped structure as a whole. The opening of the V-shaped structure faces the exhaust port of the corresponding arc extinguishing chamber (left arc extinguishing chamber 2l). One end of the lower side of the second left auxiliary plate is connected to the second left guide plate 1-162l and the other end is bent and connected to one end of the upper side of the second left auxiliary plate. The other end of the upper side of the second left auxiliary plate extends to the free end of the first left auxiliary plate 1-164l. The upper side of the second left auxiliary plate is located between the left combing column 1-20l and the first left guide plate 1-161l. The upper side of the second left auxiliary plate is arranged parallel to one side of the left combing column 1-20l.

[0111] like Figure 10 、 12 As shown in Figures 14-15, the right air guide structure 1-16r includes a first right guide plate 1-160r, a second right guide plate 1-161r, and a third right guide plate 1-162r, which are centrally symmetrical with the axis of the housing shaft hole 1-12 and are mutually centrally symmetrical with the first left guide plate 1-161l, the second left guide plate 1-162l, and the third left guide plate 1-163l. Furthermore, the right air guide structure 1-16r also includes a fourth right auxiliary plate 1-168r and a ninth right auxiliary plate 1-169r, which are centrally symmetrical with the first left auxiliary plate 1-164l and the second left auxiliary plate 1-165l, respectively, with the axis of the housing shaft hole 1-12 as the central axis.

[0112] like Figure 10 、 12 As shown in Figures 14-15, in the switch portion of this embodiment, each universal switch unit u3 includes a front phase partition plate 1-11f and a rear phase partition plate 1-11b, which are respectively arranged on the outer surfaces of a pair of side walls (front side wall 1-19f and rear side wall 1-19b) of the shell. The front phase partition plate 1-11f is used to separate the connection terminals of the front static contacts 4f of adjacent universal switch units u3, and the rear phase partition plate 1-11b is used to separate the connection terminals of the rear static contacts 4b of adjacent universal switch units u3.

[0113] The present invention also discloses an exhaust structure, which includes a shell, and the shell includes a shell arc extinguishing structure. Furthermore, the shell also includes a contact position and a disconnect position. Furthermore, the shell also includes a combing column. The specific implementation of the exhaust structure of the present invention is described above. The exhaust structure of the present invention is not only used for the above-mentioned rotary disconnector, but can also be applied to other types of switching electrical appliances (such as circuit breakers, contactors, etc.). In addition to being used in pairs as mentioned above, the shell arc extinguishing structure can be used alone, that is, only one set of shell arc extinguishing structures and a set of contact pairs matched therewith are provided in the shell. The specific implementation method can be designed by those skilled in the art according to actual needs, and will not be repeated here. When the switching electrical appliance of the present invention is a circuit breaker or a contactor, each phase of the switching electrical appliance is a switch unit; when the switching electrical appliance of the present invention is a single-phase switching electrical appliance, the whole is a switch unit.

[0114] The present invention also discloses an arc extinguishing mechanism, which includes a housing and an arc extinguishing chamber provided in the housing, wherein the housing includes a housing arc extinguishing mechanism. The specific implementation of the arc extinguishing mechanism of the present invention is described above. The arc extinguishing mechanism of the present invention is not only used for the above-mentioned rotary disconnector, but can also be applied to other types of switching electrical appliances (such as circuit breakers, contactors, etc.). In addition to being used in pairs as described above, the arc extinguishing mechanism can also be used alone, that is, only one set of housing arc extinguishing structures and a set of contact pairs cooperating therewith are provided in the housing.

[0115] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, or are conventionally placed directions or positional relationships during use. They are intended solely for ease of description and do not imply that the devices or components referred to must have a specific direction. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely for distinction and description and should not be construed as indicating relative importance.

[0116] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. An exhaust structure comprising a housing for accommodating a contact system (c) and an arc extinguishing chamber, wherein the contact system (c) comprises a contact pair that matches the arc extinguishing chamber one-to-one and comprises a static contact portion and a dynamic contact portion; Its characteristics are: The housing includes a housing arc extinguishing structure for one-to-one cooperation with the arc extinguishing chamber, the housing arc extinguishing structure includes an arc extinguishing area for accommodating the arc extinguishing chamber, a gas guide structure and an inner gas channel, and a gas outlet provided on a side wall of the housing, wherein the inner gas channel is formed between the gas guide structure and the side wall of the housing, and the gas guide structure is provided between the inner gas channel and the arc extinguishing area; The air guide structure includes at least two guide plates, one side of each guide plate faces the side wall of the shell and the other side is used to face the exhaust port of the arc extinguishing chamber arranged in the arc extinguishing area, and each guide plate is arranged in sequence on one side of the arc extinguishing area along the movement direction of the moving contact part. An air duct is provided between adjacent guide plates, an air duct is provided between the end of the guide plate close to the contact position adjacent to the contact position and the side wall of the shell, and an air duct is provided at the end of the guide plate close to the disconnection position adjacent to the disconnection position. The air duct is used to connect the internal air duct and the exhaust port of the corresponding arc extinguishing chamber.

2. The exhaust structure according to claim 1, characterized in that: The housing also includes a contact position for accommodating a static contact part and a disconnect position for accommodating a dynamic contact part that moves to a disconnect position. The contact position and the disconnect position are respectively arranged corresponding to the two ends of the arc extinguishing area. The contact position is arranged outside one end of the corresponding arc extinguishing area, and the disconnect position is arranged at the other end of the corresponding arc extinguishing area.

3. The exhaust structure according to claim 2, characterized in that: The air outlet is located between the contact position and the disconnection position. The air outlet is arranged close to the contact position relative to the disconnection position or close to the disconnection position relative to the contact position.

4. The exhaust structure according to claim 1, characterized in that: The arc extinguishing area is a fan-shaped area, and the guide plates of the air guide structure are arranged in an arc shape. The guide plates are arranged around the arc extinguishing area along the movement direction of the dynamic contact part.

5. The exhaust structure according to claim 4, characterized in that: The housing further comprises a housing shaft hole (1-12) arranged on its bottom wall and used for supporting the contacts of the movable contact mechanism (3) to rotate therein; the side surfaces of the guide plate used for facing the exhaust port of the arc extinguishing chamber are all arc-shaped side surfaces, and the arc-shaped side surfaces are arranged concentrically and coincide with the axis of the housing shaft hole (1-12).

6. The exhaust structure according to claim 5, characterized in that: The side of the guide plate facing the arc extinguishing area is also used to cooperate with the side edge of the arc extinguishing chute (2-1) of the arc extinguishing chamber to limit the arc extinguishing chamber to a working position.

7. The exhaust structure according to claim 1, characterized in that: The number of guide plates of the air guide structure is m, where m is an integer and is ≥3.

8. The exhaust structure according to any one of claims 1 to 7, characterized in that: The shell further comprises a combing column arranged in the inner air channel and matched with the air outlet in a one-to-one manner. The combing column is located on one side of the inner end of the corresponding air outlet and is arranged opposite to it.

9. The exhaust structure according to claim 8, characterized in that: The combing column is a polygonal column, and one edge of the combing column is opposite to the inner end of the air outlet; or, the combing column is a cylinder.

10. The exhaust structure according to any one of claims 1 to 7, characterized in that: The shell includes four shell side walls, which are a left side wall (1-19l) and a right side wall (1-19r) arranged opposite to each other, and a front side wall (1-19f) and a rear side wall (1-19b) arranged opposite to each other. The left side wall (1-19l), the rear side wall (1-19b), the right side wall (1-19r) and the front side wall (1-19f) are connected end to end in sequence to form four shell inner corners, and the air outlet is arranged on a side wall of the shell and close to an inner corner of the shell.

11. The exhaust structure according to claim 10, characterized in that: The direction of the air outlet is perpendicular to the side wall of the shell where the air outlet is located.

12. The exhaust structure according to claim 10, characterized in that: The shell comprises two groups of shell arc extinguishing structures respectively arranged on both radial sides of a shell shaft hole (1-12) of the shell.

13. The exhaust structure according to claim 12, characterized in that: The two groups of shell arc extinguishing structures are respectively a shell left arc extinguishing structure and a shell right arc extinguishing structure, and the shell left arc extinguishing structure and the shell right arc extinguishing structure are mutually centrally symmetrical structures with the axis of the shell shaft hole (1-12) as the central symmetry axis; The air guide structure, arc extinguishing area, inner air duct and air outlet of the left arc extinguishing structure of the shell are a left air guide structure (1-16l), a left arc extinguishing area (1-13l), a left inner air duct (1-15l) and a left air outlet (1-14l), and the contact position and disconnection position of the shell corresponding to the left arc extinguishing area are a rear contact position (1-17b) and a front disconnection position respectively; the left air guide structure (1-16l) includes a first left guide plate (1-161l), a second left guide plate (1-162l) and a third left guide plate (1-163l) which are arranged in sequence around the corresponding arc extinguishing area and along the movement direction of the corresponding dynamic contact part, and each left guide plate The plates are all arc-shaped plates and all left guide plates are in an arc-shaped structure as a whole. Air ducts are provided between adjacent left guide plates. The first left guide plate (1-161l) is arranged close to the rear contact position (1-17b) of the shell, and the third left guide plate (1-163l) is arranged close to the front disconnection position of the shell. An air duct is provided between one end of the first left guide plate (1-161l) close to the rear contact position (1-17b) and the rear side wall (1-19b) of the shell, and an air duct is provided between one end of the third left guide plate (1-163l) close to the front disconnection position and the front side wall (1-19f) of the shell, and each air duct is connected to the left inner air duct (1-15l).

14. The exhaust structure according to claim 13, characterized in that: The combing column of the housing that cooperates with the left air outlet (1-14l) is the left combing column (1-20l); the left air guiding structure (1-16l) further includes a first left auxiliary plate (1-164l) and a second left auxiliary plate (1-165l). One end of the first left auxiliary plate (1-164l) is connected to the middle of the first left guide plate (1-161l), and the other end extends into the left inner air passage (1-15l) and extends towards the left air outlet (1-14l), and this end is denoted as the free end of the first left auxiliary plate (1-164l). The first left auxiliary plate (1-164l) and the first left guide plate (1-161l) form an "丄" shaped structure as a whole. One end of the second left auxiliary plate (1-165l) extends into the air passage between the first left guide plate (1-161l) and the second left guide plate (1-162l), and this end is denoted as the inner end of the second left auxiliary plate (1-165l), and the other end extends towards the free end of the first left auxiliary plate (1-164l), and this end is denoted as the outer end of the second left auxiliary plate (1-165l). The inner end of the second left auxiliary plate (1-165l) is in abutting and limiting fit with the side edge of the arc extinguishing partition plate (2-1) of the corresponding arc extinguishing chamber. The outer end of the second left auxiliary plate (1-165l) extends into the left inner air passage (1-15l) and is arranged at an interval relative to the free end of the first left auxiliary plate ( 15. The exhaust structure according to claim 10, characterized in that: ​ The left air guide structure (1-16l) comprises a first left guide plate (1-161l), a second left guide plate (1-162l), and a third left guide plate (1-163l) which are arranged around the left arc extinguishing area (1-13l) and in sequence along the movement direction of the corresponding dynamic contact portion, each left guide plate is an arc-shaped plate and all the left guide plates are integrally formed into an arc-shaped structure, and air passages are provided between adjacent left guide plates, the first left guide plate (1-161l) is provided near the rear contact position (1-17b), the third left guide plate (1-163l) is provided near the front disconnection position, an air passage is provided between one end of the first left guide plate (1-161l) near the rear contact position (1-17b) and the rear side wall (1-19b) of the shell, and an air passage is provided between one end of the third left guide plate (1-163l) near the front disconnection position and the front side wall (1-19f) of the shell, and each air passage is connected to the left inner air passage (1-15l); The right air guide structure (1-16r) includes a first right guide plate (1-160r), a second right guide plate (1-161r), a third right guide plate (1-162r), and a fourth right guide plate (1-163r) which are arranged in sequence around the right arc extinguishing area (1-13r) and along the movement direction of the corresponding dynamic contact portion. Each right guide plate is an arc-shaped plate structure and all right guide plates are integrally formed into an arc-shaped structure. The first right guide plate (1-160r) is arranged near the front contact position (1-17f). The fourth right guide plate (1-163r) is arranged close to the rear disconnection position, an air passage is provided between one end of the first right guide plate (1-160r) close to the front contact position (1-17f) and the front side wall (1-19f) of the shell, an air passage is provided between one end of the fourth right guide plate (1-163r) close to the rear disconnection position and the rear side wall (1-19b) of the shell, and air passages are provided between each adjacent right guide plate, and each air passage is connected to the right inner air passage (1-15r).

16. The exhaust structure according to claim 15, characterized in that: The combing column of the housing that cooperates with the left air outlet (1-14l) is the left combing column (1-20l); the combing column of the housing that cooperates with the right air outlet (1-14r) is the right combing column (1-20r); The left air guiding structure (1-16l) further includes a first left auxiliary plate (1-164l) and a second left auxiliary plate (1-165l). One end of the first left auxiliary plate (1-164l) is connected to the middle of the first left guide plate (1-161l), and the other end extends towards the left air outlet (1-14l), and this end is denoted as the free end of the first left auxiliary plate (1-164l). The first left auxiliary plate (1-164l) extends into the left inner air passage (1-15l), and there is an air passage between the first left auxiliary plate (1-164l) and the rear side wall (1-19b). The first left auxiliary plate (1-164l) and the first left guide plate (1-161l) form an "丄" shaped structure as a whole. One end of the second left auxiliary plate (1-165l) extends into the air passage between the first left guide plate (1-161l) and the second left guide plate (1-162l), and this end is denoted as the inner end of the second left auxiliary plate (1-165l). The other end extends towards the free end of the first left auxiliary plate (1-164l), and this end is denoted as the outer end of the second left auxiliary plate (1-165l). The outer end of the second left auxiliary plate (1-165l) extends into the left inner air passage (1-15l). The inner end of the second left auxiliary plate (1-165l) is in abutting and limiting fit with the side edge of the arc extinguishing partition plate (2-1) of the corresponding arc extinguishing chamber. The outer end of the second left auxiliary plate (1-165l) is arranged at a relative interval with respect to the free end of the first left auxiliary plate (1-164l), and the gap between the outer end of the second left auxiliary plate (1-165l) and the free end of the first left auxiliary plate (1-164l) faces the left combing column (1-20l); The right air guide structure (1-16r) further includes a first right auxiliary plate (1-165r), a second right auxiliary plate (1-166r) and a third right auxiliary plate (1-167r), one end of the first right auxiliary plate (1-165r) is connected to an end of the first right guide plate (1-160r) close to the second right guide plate (1-161r), and the other end extends to the gap between the second right guide plate (1-161r) and the right side wall (1-19r), and the end is recorded as the free end of the first right auxiliary plate (1-165r). r) extends into the right inner airway (1-15r) and an airway is provided between the right side wall (1-19r), one end of the second right auxiliary plate (1-166r) is inserted into the airway between the third right guide plate (1-162r) and the fourth right guide plate (1-163r) and this end is recorded as the inner end of the second right auxiliary plate (1-166r), and the other end extends to the gap between the fourth right guide plate (1-163r) and the right side wall (1-19r) and this end is recorded as the outer end of the second right auxiliary plate (1-166r), the inner end of the second right auxiliary plate (1-166r) The second right auxiliary plate (1-166r) is matched with the side edge of the arc extinguishing chute (2-1) of the corresponding arc extinguishing chamber, and the outer end of the second right auxiliary plate (1-166r) extends into the right inner air duct (1-15r) and is spaced apart from the right side wall (1-19r). The second right auxiliary plate (1-166r) is spaced apart from the right side wall (1-19r) as a whole. One end of the third right auxiliary plate (1-167r) is bent and connected to one end of the fourth right guide plate (1-163r) close to the rear disconnection position, and the other end extends to the gap between the right combing column (1-20r) and the rear side wall (1-19b). The end is marked as the free end of the third right auxiliary plate (1-167r), the free end of the third right auxiliary plate (1-167r) extends into the right inner air duct (1-15r) and an air passage is provided between the free end of the third right auxiliary plate (1-167r) and the rear side wall (1-19b), the fourth right guide plate (1-163r) and the third right auxiliary plate (1-167r) are in a V-shaped structure as a whole, the opening of the V-shaped structure faces the right side wall (1-19r), and the gap between the outer end of the second right auxiliary plate (1-166r) and the free end of the third right auxiliary plate (1-167r) is opposite to the right combing column (1-20r).

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