An arc chamber for a switch

Abstract

The utility model relates to an arc extinguishing chamber of a switch belongs to switch technical field. Including grid piece, grid piece is many and is set up between each other interval, is equipped with the hole plate in the gas outlet side of grid piece, the hole plate includes the exhaust part in upper portion and the shielding portion in lower portion, is equipped with the air hole on the exhaust part, characterized by: the grid piece is equipped with the blocking piece between the hole plate, and the grid piece includes the cooperation grid piece group with the blocking piece cooperation and the lower grid piece group under the blocking piece cooperation;Form the first gas cavity between the blocking piece and the hole plate, and form the second gas cavity in the corresponding cooperation grid piece group and the blocking piece outside;The gas that cooperation grid piece group discharged enters the second gas cavity and is discharged outward through the exhaust part;And the gas that lower grid piece group discharged only enters the first gas cavity upward and is discharged outward through the exhaust part. Advantage: prevent the airflow of different areas from interfering with each other, guarantee arc to enter the whole arrayed grid piece group smoothly, thereby help arc to extinguish fast, and further improve the arc extinguishing performance of arc extinguishing chamber.

Description

Technical Field

[0001] This utility model belongs to the field of switch technology, specifically relating to an arc-extinguishing chamber for a switch. Background Technology

[0002] Switches, as important components in the field of low-voltage electrical appliances, are mainly used to conduct or switch current to meet the needs of the power supply network. Furthermore, when encountering a fault current, they can automatically disconnect the fault current to ensure the safety of their load and protect it from the effects of the fault current. Therefore, they are widely used.

[0003] The switch consists of an arc-extinguishing chamber and a contact system. The arc-extinguishing chamber contains an array of grid plates. When the electric arc generated by the contact system enters the arc-extinguishing chamber, it is cut by the grid plates, thus quickly extinguishing the arc. The contact system includes moving and stationary contacts. The grid plates are arranged in the direction of the line connecting the moving and stationary contacts; therefore, one end of the array of grid plates faces the moving contact, and the other end faces the stationary contact. However, for the arc-extinguishing chamber, due to the different positions of the air outlets between the grid plates, the airflow from the grid plates with stronger airflow can impact the airflow from the grid plates with weaker airflow, resulting in arc backflow. This prevents the arc from smoothly entering the entire grid plate array, thus hindering the rapid extinguishing of the arc. Utility Model Content

[0004] The objective of this invention is to provide an arc-extinguishing chamber for a switch. This chamber utilizes a sealing element between the grid plates and the orifice plate. The grid plates include a mating grid plate group that cooperates with the sealing element and a lower grid plate group located below the sealing element. A first air chamber is formed between the sealing element and the orifice plate, while a second air chamber is formed corresponding to the mating grid plate group and located outside the sealing element. Gas discharged from the mating grid plate group enters the second air chamber and is discharged outwards through an exhaust section. Gas discharged from the lower grid plate group only enters the first air chamber upwards and is discharged outwards through the exhaust section, preventing airflow interference between different areas and ensuring that the electric arc smoothly enters the entire grid plate group.

[0005] The present invention achieves its objective as follows: an arc-extinguishing chamber for a switch includes multiple grid plates spaced apart from each other. A perforated plate is provided on the outlet side of each grid plate. The perforated plate includes an upper exhaust portion and a lower blocking portion. Air holes are provided in the exhaust portion. A sealing member is provided between the grid plates and the perforated plate. The grid plates include a mating grid plate group that cooperates with the sealing member and a lower grid plate group located below the sealing member. A first air chamber is formed between the sealing member and the perforated plate, and a second air chamber is formed corresponding to the mating grid plate group and located outside the sealing member. Gas discharged from the mating grid plate group enters the second air chamber and is discharged outwards through the exhaust portion. Gas discharged from the lower grid plate group only enters the first air chamber upwards and is discharged outwards through the exhaust portion.

[0006] In a specific embodiment of this utility model, the arc-extinguishing chamber further includes a partition wall, the sealing member has a sealing part and an abutment edge, the sealing part is used to block part of the air outlet of the grid plate that it cooperates with, and the abutment edge separates the first air chamber and the second air chamber, and the partition wall is used to prevent the gas discharged from the lower grid plate group from entering the second air chamber.

[0007] In another specific embodiment of this utility model, the sealing part is plate-shaped and is placed horizontally on one side of part of the air outlet of the end grid plate group, or the sealing part is composed of multiple inserts inserted between adjacent grid plates, and the sealing part is inserted between adjacent grid plates in the mating grid plate group.

[0008] In another specific embodiment of this utility model, the mating grid plate assembly includes a first grid plate and a second grid plate, wherein the second grid plate is used to mate with the sealing member, the partition is a protrusion on the air outlet side of the second grid plate, the protrusion mates with the sealing member, and in the width direction of the grid plate, the abutment edge is at least located on the side of the sealing member close to the protrusion.

[0009] In another specific embodiment of this utility model, the partition is the isolation portion of the sealing member. In the width direction of the grid plate, the isolation portion extends from the sealing member toward the end of the grid plate away from the sealing portion, and the abutment edge is at least located on the side of the sealing portion close to the isolation portion.

[0010] In another specific embodiment of this utility model, the abutting edge is a pair. In the width direction of the grid plate, the pair of abutting edges are located on both sides of the sealing portion, and the abutting edge is used to abut against the perforated plate.

[0011] In a further specific embodiment of this utility model, the sealing parts are a pair. In the width direction of the grid plate, the pair of sealing parts correspond to the two ends of the air outlet of the grid plate in the width direction of the grid plate. The pair of sealing parts are spaced apart from each other, and an opening is formed between the pair of sealing parts. The abutting edges are a pair. In the width of the grid plate, the abutting edges are respectively located on both sides of the opening. The partition is the isolation part of the sealing member. The isolation part is located between the pair of abutting edges.

[0012] In a further specific embodiment of the present invention, in the width direction of the grid plate, the blocking portion is located between a pair of abutting edges; the partition is the isolation portion of the blocking member, and there is a pair of isolation portions. In the width direction of the grid plate, the isolation portion extends from the abutting edge to the side away from the blocking portion; an exhaust port is formed on the outer side of the pair of abutting edges, and there is also a pair of exhaust ports.

[0013] In yet another specific embodiment of this utility model, the protrusions are a pair, located on both sides of the sealing member and cooperating with the sealing member; the abutment edges are a pair, located on both sides of the sealing portion.

[0014] In yet another specific embodiment of this utility model, the sealing member further has a slot, which is located on the side of the sealing member facing the grid plate, and the slot is used to engage with the grid plate.

[0015] This utility model, due to the above-mentioned structure, has the following beneficial effects: A sealing member is provided between the grid plate and the orifice plate. The grid plate includes a mating grid plate group that cooperates with the sealing member and a lower grid plate group located below the sealing member. A first air chamber is formed between the sealing member and the orifice plate, while a second air chamber is formed corresponding to the mating grid plate group and located outside the sealing member. Gas discharged from the mating grid plate group enters the second air chamber and is discharged outward through the exhaust section. Gas discharged from the lower grid plate group only enters the first air chamber upward and is discharged outward through the exhaust section, preventing airflow interference between different areas and ensuring that the electric arc smoothly enters the entire grid plate group, thereby facilitating rapid arc extinguishing and improving the arc extinguishing performance of the arc-extinguishing chamber. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the internal structure of the switch involved in this utility model; Figure 2 This is an exploded view of the first embodiment of the present invention; Figure 3 This is a schematic diagram of the sealing member and the grid plate after being installed together in the first embodiment of this utility model; Figure 4 This is a schematic diagram of the second grid sheet in the first embodiment of the present invention; Figure 5 This is a schematic diagram of the sealing member in the first embodiment of the present utility model; Figure 6 This is a schematic diagram of the sealing member in the second embodiment of the present utility model; Figure 7 This is a schematic diagram of the installation of the sealing member and the grid plate in the second embodiment of the present utility model; Figure 8 This is a schematic diagram illustrating another possible assembly of the sealing member and the grid plate in the second embodiment of this utility model; Figure 9 This is a schematic diagram of the sealing member in the third embodiment of the present utility model; Figure 10 This is a schematic diagram of the installation of the sealing member and the grid plate in the third embodiment of this utility model; Figure 11 This is a schematic diagram of the sealing member in the fourth embodiment of this utility model; Figure 12 This is a schematic diagram illustrating the installation of the sealing member and the grid plate in the fourth embodiment of this utility model. Figure 13 This is a schematic diagram illustrating another possible assembly of the sealing member and the grid plate in the fourth embodiment of this utility model; Figure 14 This is an exploded view of the fourth embodiment of the present invention; Figure 15 This is a schematic diagram of the second grid sheet in the fifth embodiment of the present invention; Figure 16 This is a schematic diagram of the installation of the sealing member and the grid plate in the fifth embodiment of this utility model; Figure 17 This is an exploded view of the fifth embodiment of the present invention; In the figure: 1. Arc-extinguishing chamber; 11. Grid plate; 111. First grid plate; 112. Second grid plate; 1121. Cutting part; 1122. Grid plate leg; 1123. Notch; 1124. Protrusion; 1125. Mounting protrusion; 13. Arc-starting plate; 14. Sealing part; 141. Sealing part; 142. Abutting edge; 143. Slot; 144. Isolation part; 145. Opening; 146. Exhaust port; 100. Orifice plate; 101. Exhaust part; 102. Shielding part; 200. Housing; 300. Static conductive rod; 400. First air chamber; 500. Second air chamber. Detailed Implementation

[0017] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. However, the description of the embodiments is not a limitation on the technical solution. Any formal but not substantive changes made based on the concept of this utility model should be considered within the protection scope of this utility model.

[0018] In the following description, all directional (or orientational) concepts involving up, down, left, right, front, and back refer to the position of the figure being described, and are intended to facilitate public understanding. Therefore, they should not be construed as a special limitation on the technical solution provided by this utility model.

[0019] like Figure 1 This is a schematic diagram of the internal structure of a switch. The switch includes an arc-extinguishing chamber 1, a contact system (not shown), and a housing 200. The housing 200 is hollow inside to accommodate the arc-extinguishing chamber 1 and the contact system. Typically, the arc-extinguishing chamber 1 is positioned on the open side of the contact system, allowing the electric arc generated on the contact system to enter and be extinguished within the arc-extinguishing chamber 1. An orifice plate 100 is provided on the outlet side of the arc-extinguishing chamber 1. The orifice plate 100 includes an upper exhaust section 101 and a lower blocking section 102. The exhaust section 101 has vent holes. That is, the airflow in the lower part of the arc-extinguishing chamber 1 is blocked by the blocking section 102, moves upwards to the exhaust section 101, and can then be discharged through the vent holes. The airflow in the upper part of the arc-extinguishing chamber 1 can be discharged through the vent holes of the exhaust section 101. In other words, in the array direction of the grid plates 11, the exhaust section 101 is biased on the side of the orifice plate 100 closer to the moving conductive rod.

[0020] Combination Figure 2 The contact system includes a moving conductive rod (not shown) and a stationary conductive rod 300. Preferably, the stationary conductive rod 300 has a U-shaped structure, which is used to increase the magnetic field driving force of the electric arc. The stationary conductive rod 300 is fixed, while the moving conductive rod is movable; preferably, the moving conductive rod is rotatable. The moving conductive rod can be referred to as a moving contact, and the stationary conductive rod 300 can be referred to as a stationary contact.

[0021] The arc-extinguishing chamber 1 includes grid plates 11, side walls 12, and arc-inducing plates 13. The grid plates 11 and the arc-inducing plates 13 are both disposed between a pair of side walls 12. Multiple grid plates 11 are provided, spaced apart from each other. The arc-inducing plates 13 correspond to one side of the moving conductive rod and are used to cooperate with the moving conductive rod.

[0022] Combination Figure 3 A sealing member 14 is provided between the grid plate 11 and the perforated plate 100. The sealing member 14 is biased at the upper part. The grid plate 11 includes a mating grid plate group that cooperates with the sealing member 14 and a lower grid plate group located below the sealing member 14. A first air chamber 400 is formed between the sealing member 14 and the perforated plate 100, and a second air chamber 500 is formed corresponding to the mating grid plate group and located outside the sealing member 14. The gas discharged from the mating grid plate group enters the second air chamber 500 and is discharged outward through the exhaust section 101. The gas discharged from the lower grid plate group only enters the first air chamber 400 upward and is discharged outward through the exhaust section 101.

[0023] The orifice plate 100 can be fixed to the arc-extinguishing chamber 1, or the orifice plate 100 can be disposed on the housing 200. Specifically, the sealing member 14 is biased at the upper part. That is, in the array direction of the grid plates 11, the sealing member 14 is biased on the side closer to the moving conductive rod, or, in other words, the sealing member 14 is biased on the side away from the stationary conductive rod 300.

[0024] See you later Figure 3 The grid plate 11 includes a first grid plate 111 and a second grid plate 112. Specifically, the mating grid plate group includes the first grid plate 111 and the second grid plate 112. Of course, the lower grid plate group only includes the first grid plate 111. The second grid plate 112 is used to cooperate with the sealing member 14, and the two cooperate to separate the air outlet side of the grid plate 11. In this description, the first grid plate 111 and the second grid plate 112 refer to the distinction in shape of the grid plate 11. The mating grid plate group and the lower grid plate group refer to the distinction in the distribution position of the grid plates 11.

[0025] like Figure 4 This is a schematic diagram of the second grid plate 112. The second grid plate 112 includes a cutting portion 1121, grid plate legs 1122, and a notch 1123. The cutting portion 1121 is used to cut the electric arc and can also be referred to as the base. The grid plate legs 1122 extend from the cutting portion 1121 into the contact system. In this embodiment, since the notch 1123 is offset, it forms only one grid plate leg 1122 on one side. Of course, the grid plate legs 1122 can also be a pair, and the notch 1123 is located between the pair of grid plate legs 1122.

[0026] The difference between the second grid plate 112 and the first grid plate 111 is that the second grid plate 112 has a protrusion 1124 on the air outlet side, and the protrusion 1124 cooperates with the sealing member 14 to divide the air cavity of the air outlet.

[0027] The second grid plate 112 also has mounting protrusions 1125 on both sides. The mounting protrusions 1125 are used for mounting and fixing the second grid plate 112 to the pair of sidewalls 12.

[0028] like Figure 5This is a schematic diagram of the sealing member 14. The sealing member 14 is made of insulating material. The sealing member 14 has a sealing portion 141, an abutment edge 142, and a slot 143. In the width direction of the grid plate 11, the abutment edge 142 is located at least on the side of the sealing portion 141 near the protrusion 1124. Preferably, there is a pair of abutment edges 142, located on both sides of the sealing portion 141, and the abutment edges 142 are used to abut against the perforated plate 100. That is, the sealing portion 141 is located between the pair of abutment edges 142.

[0029] The slot 143 is located on the side of the sealing member 14 facing the grid plate 11. The slot 143 is used to engage with the grid plate 11, thereby realizing the engagement and installation of the sealing member 14 and the grid plate 11.

[0030] In this embodiment, the blocking portion 141 is biased on the side of the array of grid plates 11 closest to the moving conductive rod. Due to the obstruction of the blocking portion 141, the grid plates 11 that cooperate with the blocking portion 141 can only exhaust gas through the portion not blocked by the blocking portion 141. That is, the gas discharged from the cooperating grid plate assembly enters the second gas chamber 500 and is discharged outward through the exhaust portion 101.

[0031] See Figure 2 , Figure 4 Because the protrusion 1124 cooperates with the sealing member 14, the air outlet channels of the grid plates on both sides of the protrusion 1124 are isolated. This prevents the airflow on the outlet side from interfering with each other and ensures that the electric arc can smoothly enter the grid plate 11. In the array of grid plates 11, a first air chamber 400 is formed between the sealing member 14 and the perforated plate 100, and a second air chamber 500 is formed corresponding to the cooperating grid plate group and located outside the sealing member 14. The gas discharged from the cooperating grid plate group enters the second air chamber 500 and is discharged outward through the exhaust part 101; while the gas discharged from the lower grid plate group only enters the first air chamber 400 upward and is discharged outward through the exhaust part 101.

[0032] During the above process, due to the cooperation between the protrusion 1124 and the sealing member 14, the air chambers on both sides of the protrusion 1124 are isolated in the direction of the grid array 11, preventing mutual influence or interference of airflow. In other words, the air chambers on both sides of the protrusion 1124 are isolated. In this embodiment, the first air chamber 400 and the second air chamber 500 are isolated.

[0033] like Figure 6 , Figure 7 , Figure 8This is a schematic diagram of the second embodiment. The difference from the first embodiment is that the sealing member 14 further includes an isolation portion 144, located on one side of the sealing member 14. The isolation portion 144 is used to isolate the air chambers on both sides, thereby forming a first air chamber 400 and a second air chamber 500 that are isolated according to design requirements. To optimize the isolation effect of the isolation portion 144, the isolation portion 144 is inserted between the grid plates 11, thereby achieving a better isolation effect.

[0034] Preferably, the isolation portion 144 is plate-shaped. In the width direction of the grid plate 11, the isolation portion 144 extends from the blocking member 14 towards the other end of the grid plate 11. The abutment edge 142 is located at least on the side of the blocking portion 141 closest to the isolation portion 144. Preferably, the abutment edges 142 are a pair and are located on both sides of the blocking portion 141 in the width direction of the grid plate 11. That is, the blocking portion 141 is also located between the pair of abutment edges 142.

[0035] In the width direction of the grid plate 11, the blocking member 14 is offset to one side. Thus, on the air outlet side of the grid plate 11, the blocking member 14 blocks one side of the air outlet of the grid plate 11, while the grid plate 11 that cooperates with the blocking member 14 can release air from the other side that is not blocked by the blocking member 14.

[0036] In this embodiment, the function of the isolation part 144 is the same as that of the protrusion 1124 in the first embodiment, both of which are used to separate the airflow on both sides.

[0037] like Figure 7 In the array direction of the grid 11, the blocking member 14 extends from one end corresponding to the moving conductive rod toward the middle of the grid 11.

[0038] like Figure 8 In the array direction of the grid plates 11, the blocking member 14 is only biased on the side of the grid plate 11 closest to the moving conductive rod, but does not engage with the end corresponding to the moving conductive rod. At this time, there is also an upper grid plate group above the engaging grid plate group.

[0039] The positions of the two types of sealing members 14 described above can be summarized as follows: the sealing member 14 is offset at the upper part. Specifically, the sealing member 14 is offset on the side of the grid plate 11 near the moving conductive rod.

[0040] like Figure 9 , Figure 10This is a schematic diagram of the third embodiment. The sealing member 14 has a pair of sealing portions 141. Along the width direction of the grid plate 11, the pair of sealing portions 141 correspond to the two ends of the air outlet of the grid plate 11 along its width direction. The pair of sealing portions 141 are spaced apart from each other, forming an opening 145 between them. A first air chamber 400 is formed between the sealing member 14 and the perforated plate 100; and a second air chamber 500 is formed corresponding to the mating grid plate assembly and located outside the sealing member 14. In this embodiment, the second air chamber 500 is the air chamber formed by the opening 145.

[0041] The abutment edges 142 are a pair. Along the width of the grid plate 11, the abutment edges 142 are located on both sides of the opening 145. The abutment edges 142 abut against the perforated plate 100, thereby isolating the airflow between the pair of abutment edges 142 from the airflow on the side of the abutment edges 142 away from the opening 145, forming separated air chambers. That is, a pair of sealing portions 141 are located on the outer sides of the pair of abutment edges 142.

[0042] The sealing member 14 also has the slot 143. The slot 143 is located on the side of the sealing member 14 facing the grid plate 11, and the slot 143 is used to engage with the grid plate 11.

[0043] The isolation portion 144 is located between the pair of abutment edges 142. It also serves to isolate the air cavity. Preferably, in the array direction of the grid plates 11, the isolation portion 144 is located at the end of the sealing member 14 away from the moving conductive rod.

[0044] Similarly, in this embodiment, the blocking member 14 is biased at the upper part. Specifically, the blocking member 14 is biased on the side of the grid plate 11 near the moving conductive rod.

[0045] like Figure 11 , Figure 12 , Figure 13 , Figure 14 This is a schematic diagram of the fourth embodiment. In the width direction of the grid plate 11, the blocking portion 141 is located between a pair of abutment edges 142, that is, the pair of abutment edges 142 are located at both ends of the blocking portion 141. In the width direction of the grid plate 11, the blocking portion 141 blocks the middle of the air outlet, while the two outer sides of the blocking portion 141 are used for air outlet. Similarly, the blocking member 14 also has the slot 143. The slot 143 is located on the side of the blocking member 14 facing the grid plate 11, and the slot 143 is used for engaging with the grid plate 11.

[0046] The isolation portions 144 are a pair. Along the width direction of the grid plates 11, the isolation portions 144 are located on the outer sides of the pair of abutment edges 142. That is, the isolation portions 144 extend from the abutment edges 142 away from the sealing portion 141 to isolate the air cavity. Preferably, the isolation portions 144 are inserted between adjacent grid plates 11 for better isolation.

[0047] Exhaust ports 146 are formed on the outer sides of the pair of abutment edges 142, and there is a corresponding pair of exhaust ports 146. These are used for venting the grid plates 11 that cooperate with the sealing member 14. A first air chamber 400 is formed between the sealing member 14 and the perforated plate 100; and a second air chamber 500 is formed corresponding to the cooperating grid plate group and located on the outer side of the sealing member 14. In this embodiment, the second air chamber 500 is the air chamber formed by the exhaust ports 146.

[0048] like Figure 12 In the array direction of the grid 11, the blocking member 14 is only biased on the side of the grid 11 near the moving conductive rod, but does not cooperate with the end of the moving conductive rod.

[0049] like Figure 13 In the array direction of the grid 11, the blocking member 14 extends from one end corresponding to the moving conductive rod toward the middle of the grid 11.

[0050] like Figure 14 The placement of the two types of sealing members 14 described above can be summarized as follows: the sealing member 14 is offset at the upper part. Specifically, the sealing member 14 is offset on the side of the grid plate 11 near the moving conductive rod.

[0051] like Figure 15 , Figure 16 , Figure 17 This is a schematic diagram of the fifth embodiment.

[0052] like Figure 15 This is a schematic diagram of the second grid plate 112 in this embodiment. The second grid plate 112 includes a cutting portion 1121, grid plate legs 1122, and a notch 1123. The cutting portion 1121 is used to cut the electric arc and can also be referred to as the base. The grid plate legs 1122 extend from the cutting portion 1121 towards the contact system. In this embodiment, since the notch 1123 is offset, it forms only one grid plate leg 1122 on one side. Of course, the grid plate legs 1122 can also be a pair, and the notch 1123 is located between the pair of grid plate legs 1122.

[0053] The abutment edges 142 are a pair, and the pair of abutment edges 142 are located on both sides of the sealing part 141.

[0054] The second grid plate 112 has a protrusion 1124 on the air outlet side. The protrusion 1124 cooperates with the sealing member 14 to divide the air cavity of the air outlet. Specifically, there is a pair of protrusions 1124, located on both sides of the sealing member 14, and cooperates with the sealing member 14. In this case, the sealing member 14 no longer has the isolation portion 144. The difference between this embodiment and the fourth embodiment is that the pair of isolation portions 144 are replaced by a pair of protrusions 1124.

[0055] Similarly, the sealing member 14 and the perforated plate 100 cooperate to form a first air chamber 400, and the openings on both sides of the sealing member 14 form the second air chamber 500. The perforated plate 100 has an exhaust section 101 for discharging gas outward.

[0056] This invention provides a sealing member 14 on the air outlet side of the grid plate 11, and a perforated plate 100 on the side of the sealing member 14 away from the grid plate 11. The sealing member 14, the perforated plate 100 and the grid plate 11 cooperate to form at least two isolated air chambers on the air outlet side of the grid plate 11 to prevent mutual interference of airflow and ensure that the electric arc can smoothly enter the entire row of grid plates 11.

[0057] Specifically, the blocking portion 141 blocks part of the air outlet of its mating grid plate 11, while the abutment edge 142 isolates the air cavity along the width of the grid plate 11. Correspondingly, the isolation portion 144 on the blocking member 14 and the protrusion 1124 of the second grid plate 112 serve the same function, that is, they cooperate with the blocking member 14 to isolate the air cavity in the array direction of the grid plates 11. The isolation portion 144 and the protrusion 1124 can be collectively referred to as a partition wall, that is, the partition wall isolates the air passage in the array direction of the grid plates 11.

[0058] In the present invention, the sealing part 141 described in the above embodiments is plate-shaped and is placed horizontally on one side of a portion of the air outlet of the end grid assembly. Of course, if the sealing part 141 is adjusted to consist of multiple inserts that are inserted between adjacent grid plates 11, and the sealing member 14 is inserted between adjacent grid plates 11 in the mating grid plate group, it can also seal part of the air outlet of the mating grid plate group that mates with the sealing member 14, and isolate the first air chamber 400 from the second air chamber 500. This also achieves the same effect and falls within the protection scope of this invention.

[0059] It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of this utility model. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

[0060] In summary, the technical solution provided by this utility model makes up for the shortcomings of the prior art, successfully completes the invention task, and faithfully realizes the technical effects described by the applicant in the above technical effect column.

Claims

1. An arc-extinguishing chamber for a switch, comprising multiple grid plates (11) spaced apart from each other, and a perforated plate (100) provided on the outlet side of each grid plate (11), the perforated plate (100) comprising an upper exhaust portion (101) and a lower shielding portion (102), the exhaust portion (101) having air holes, characterized in that: A sealing member (14) is provided between the grid plate (11) and the perforated plate (100). The grid plate (11) includes a mating grid plate group that cooperates with the sealing member (14) and a lower grid plate group located below the sealing member (14). A first air chamber (400) is formed between the sealing member (14) and the perforated plate (100), and a second air chamber (500) is formed corresponding to the mating grid plate group and located outside the sealing member (14). The gas discharged from the mating grid plate group enters the second air chamber (500) and is discharged outward through the exhaust section (101). The gas discharged from the lower grid plate group only enters the first air chamber (400) upward and is discharged outward through the exhaust section (101).

2. The arc-extinguishing chamber of a switch according to claim 1, characterized in that: The arc-extinguishing chamber (1) further includes a partition wall. The sealing member (14) has a sealing part (141) and an abutment edge (142). The sealing part (141) is used to block part of the air outlet of the grid plate (11) that it cooperates with, while the abutment edge (142) separates the first air chamber (400) and the second air chamber (500). The partition wall is used to prevent the gas discharged from the lower grid plate group from entering the second air chamber (500).

3. The arc-extinguishing chamber of a switch according to claim 2, characterized in that: The sealing part (141) is plate-shaped and is placed horizontally on one side of part of the air outlet of the end grid plate group. Alternatively, the sealing part (141) is composed of multiple inserts that are inserted between adjacent grid plates (11). The sealing part (141) is inserted between adjacent grid plates (11) in the mating grid plate group.

4. The arc-extinguishing chamber of a switch according to claim 2, characterized in that: The mating grid assembly includes a first grid (111) and a second grid (112), wherein the second grid (112) is used to mate with the sealing member (14), and the partition is a protrusion (1124) on the air outlet side of the second grid (112), wherein the protrusion (1124) mates with the sealing member (14), and in the width direction of the grid (11), the abutment edge (142) is located at least on the side of the sealing member (141) near the protrusion (1124).

5. The arc-extinguishing chamber of a switch according to claim 2, characterized in that: The partition is the isolation portion (144) of the sealing member (14). In the width direction of the grid plate (11), the isolation portion (144) extends from the sealing member (14) toward the end of the grid plate (11) away from the sealing portion (141). The abutment edge (142) is located at least on the side of the sealing portion (141) near the isolation portion (144).

6. The arc-extinguishing chamber of a switch according to claim 4 or 5, characterized in that: The abutting edges (142) are a pair. In the width direction of the grid plate (11), the pair of abutting edges (142) are located on both sides of the sealing part (141). The abutting edges (142) are used to abut against the perforated plate (100).

7. The arc-extinguishing chamber of a switch according to claim 3, characterized in that: The sealing parts (141) are a pair. In the width direction of the grid plate (11), the pair of sealing parts (141) correspond to the two ends of the air outlet of the grid plate (11) in the width direction of the grid plate (11). The pair of sealing parts (141) are spaced apart from each other, and an opening (145) is formed between the pair of sealing parts (141). The abutting edges (142) are a pair. In the width of the grid plate (11), the abutting edges (142) are located on both sides of the opening (145). The partition is the isolation part (144) of the sealing member (14). The isolation part (144) is located between the pair of abutting edges (142).

8. The arc-extinguishing chamber of a switch according to claim 3, characterized in that: In the width direction of the grid plate (11), the blocking portion (141) is located between a pair of abutting edges (142); the partition is the isolation portion (144) of the blocking member (14), the isolation portion (144) is a pair, and in the width direction of the grid plate (11), the isolation portion (144) extends from the abutting edge (142) to the side away from the blocking portion (141); an exhaust port (146) is formed on the outside of the pair of abutting edges (142), and the exhaust port (146) is also a pair.

9. The arc-extinguishing chamber of a switch according to claim 4, characterized in that: The protrusions (1124) are a pair, located on both sides of the sealing member (14) and cooperating with the sealing member (14). The abutment edges (142) are a pair, located on both sides of the sealing part (141).

10. The arc-extinguishing chamber of a switch according to claim 3, characterized in that: The sealing member (14) also has a slot (143) located on the side of the sealing member (14) facing the grid plate (11), and the slot (143) is used to engage with the grid plate (11).

Images