Arc extinguish chamber

Abstract

An arc extinguish chamber belongs to the technical field of low-voltage apparatuses. Comprising a pair of side plates and a plurality of grid sheets arranged between the pair of side plates, and the grid sheets are arranged at intervals; the LED lamp is characterized by further comprising a pair of partition plates made of insulating materials without glass fibers, and each partition plate is attached to the inner side of one side plate. The grid plate has the advantages that the side plates are prevented from being burnt by electric arcs, particles cannot be generated after the partition plate is burnt, and normal work of the grid plate cannot be affected.

Description

Technical Field

[0001] This utility model belongs to the field of low-voltage electrical technology, specifically relating to an arc-extinguishing chamber. Background Technology

[0002] Switches are crucial electrical appliances in power supply and distribution lines. They interrupt the current carrying the circuit, protecting the lines and electrical equipment. A switch typically includes a contact system, which consists of moving and stationary contacts. When the moving contact actuates, it contacts or separates from the stationary contact, thus enabling the switch to conduct or disconnect. As is known in the industry, when a switch breaks, an electric arc is generated between the moving and stationary contacts. Due to the relatively large energy of the arc, breaking the switch becomes extremely difficult. Therefore, switches usually include an arc-extinguishing chamber to extinguish the arc generated when the moving and stationary contacts separate. The circuit is only broken when the arc is extinguished. The role of the arc-extinguishing chamber in ensuring the safe operation of electrical equipment is undeniable.

[0003] The arc-extinguishing chamber includes a pair of side plates and multiple grid plates arranged between them. In practice, when an electric arc enters the arc-extinguishing chamber, it burns the side plates on both sides. Existing side plates are typically made of insulating materials with fiberglass, and when burned, they produce particles that adhere to the grid plates, affecting their normal operation. Utility Model Content

[0004] The objective of this invention is to provide an arc-extinguishing chamber, which prevents the side plate from being burned by an electric arc by attaching a partition made of insulating material that does not contain glass fiber to the inside of the side plate. Furthermore, the partition does not produce particles after being burned, and does not affect the normal operation of the grid plate.

[0005] The present invention accomplishes its objective as follows: an arc-extinguishing chamber includes a pair of side plates and a grid plate disposed between the pair of side plates, wherein there are multiple grid plates and they are spaced apart from each other; it also includes a pair of partitions made of insulating material that does not contain glass fiber, each partition plate being attached to the inner side of one of the side plates.

[0006] In a specific embodiment of this utility model, the partition is provided with an elbow at the air outlet end corresponding to the grid plate, so that the partition forms an "L" shape, and the elbow is flat and rests on the steps on both sides of the air outlet end of the grid plate.

[0007] In another specific embodiment of this utility model, a perforated plate and a deionization component are provided on the air outlet side of the grid plate. The deionization component includes a bracket, which is hollow inside to form a receiving cavity. The perforated plate is located inside the receiving cavity. A flange is formed at the air outlet end of the grid plate. The flange is located between a pair of steps. The front end of the flange extends into the interior of the bracket and abuts against the perforated plate. The elbow abuts against the lower edge of the bracket.

[0008] In another specific embodiment of this utility model, the grid plate includes mounting bosses located on both sides of the grid plate in the width direction; the partition plate has a first mating hole for the mounting bosses to pass through.

[0009] In another specific embodiment of this utility model, a pair of gas generating elements are provided on the air inlet side of the array grid, and a second mating hole is also provided on the partition plate, the second mating hole being used for the installation end of the gas generating element to pass through.

[0010] In another specific embodiment of this utility model, a movable arc-inducing plate is provided on one side of the array of grid plates. The upper end of the movable arc-inducing plate is located outside the array of grid plates along the grid plate array direction, and its lower end extends into the arc-extinguishing chamber. A third mating hole is also provided on the partition plate, which is used for the passage of the mounting end of the movable arc-inducing plate.

[0011] In a further specific embodiment of this utility model, a pair of gas generating elements are provided on the air inlet side of the array grid, and a clearance recess is provided on the side of the partition plate near the gas generating elements, the clearance recess distancing the contact surface between the gas generating elements and the side plate.

[0012] In a further specific embodiment of this utility model, the partition is held between the grid plate and the side plate.

[0013] In yet another specific embodiment of this utility model, a movable arc-inducing plate is provided on one side of the array of grid plates. The upper end of the movable arc-inducing plate is located outside the array of grid plates along the grid plate array direction, and its lower end extends into the arc-extinguishing chamber. In the width direction of the grid plates, the projection of the movable arc-inducing plate on the side plate is located inside the projection of the partition plate on the side plate.

[0014] In yet another specific embodiment of this utility model, the side plate is made of an insulating material containing glass fiber.

[0015] Due to the above-mentioned structure, this utility model has the following advantages: a partition made of insulating material without glass fiber is attached to the inner side of the side plate, thereby preventing the side plate from being burned by electric arc, and the partition will not produce particles after being burned, thus not affecting the normal operation of the grid plate. Attached Figure Description

[0016] Figure 1 This is an exploded view of the switch described in this utility model;

[0017] Figure 2 This is an exploded view of the arc-extinguishing chamber described in this utility model;

[0018] Figure 3 This is a schematic diagram showing the lateral fit between the arc-extinguishing chamber and the contact system described in this utility model;

[0019] Figure 4 This is a three-dimensional schematic diagram of the grid plate and the perforated plate described in this utility model;

[0020] Figure 5 This is a schematic diagram showing the cooperation between the grid plate and the perforated plate of this utility model;

[0021] Figure 6 This is a schematic diagram of the electric arc after the grid plate and the perforated plate of this utility model are engaged;

[0022] Figure 7 This is a schematic diagram of the partition described in this utility model.

[0023] In the diagram: 1. Arc-extinguishing chamber; 11. Side plate; 12. Grid plate; 121. Notch; 122. Grid plate leg; 123. Mounting boss; 124. Step; 125. Flange; 13. Gas generating component; 14. De-ionization assembly; 141. Bracket; 142. Flame extinguishing plate bracket; 143. Filter assembly; 144. Sealing gasket; 15. Arc-extinguishing cover; 16. Pin assembly; 2. Contact system; 21. Moving contact; 2 2. Stationary contact; 3. Housing; 31. Base; 32. Bottom plate; 100. Partition; 101. Elbow; 102. First mating hole; 103. Second mating hole; 104. Third mating hole; 105. Relief recess; 200. Moving arc-drawing plate; 201. Gas-generating plate; 300. Orifice plate; 301. First vent hole row; 3011. Circular hole; 3012. Strip hole; 302. Second vent hole row. Detailed Implementation

[0024] 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.

[0025] 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.

[0026] like Figure 1 The switch includes a disconnector and a circuit breaker. The switch comprises an arc-extinguishing chamber 1, a contact system 2, and a housing 3. The housing 3 includes a base 31 and a bottom plate 32, which are joined together to form the housing 3. Typically, the base 31 and the bottom plate 32 are secured using threaded fastening.

[0027] The contact system 2 includes a moving contact 21 and a stationary contact 22. The moving contact 21 is mounted on the base 31, while the stationary contact 22 is mounted on the base plate 32. Specifically, the moving contact 21 is rotatably mounted, while the stationary contact 22 is fixedly mounted. After the moving contact 21 actuates, it makes contact with or separates from the stationary contact 22. The arc-extinguishing chamber 1 is located on one side of the contact system 2 in the opening direction.

[0028] like Figure 2 , Figure 3 The arc-extinguishing chamber 1 includes a pair of side plates 11 and multiple grid plates 12 disposed between the pair of side plates 11. It also includes a pair of partitions 100, each partition 100 being attached to the inner side of one side plate 11. A moving arc-inducing plate 200 is also provided on the side of the arrayed grid plates 12 corresponding to the moving contact 21. A gas-generating element 13 is provided on the air inlet side of the arrayed grid plates 12. The gas-generating elements 13 are a pair, each wrapping around one of the two grid plate legs 122 of the grid plate 12. An orifice plate 300 and an anti-ionization component 14 are provided on the air outlet side of the grid plate 12, and an arc-extinguishing cover 15 is installed above the anti-ionization component 14. Specifically, the orifice plate 300 is adjacent to the grid plate 12. Similarly, the anti-ionization component 14 is located on the air outlet side of the grid plate 12, and the arc-extinguishing cover 15 is located above the anti-ionization component 14. The gas generating component 13 is fixed to the grid leg 122 of the grid plate 12 by a pin assembly 16, and the gas generating component 13 is simultaneously riveted to the corresponding side plate 11.

[0029] like Figure 2The flame extinguishing component 14 includes a support 141, which is hollow to form a receiving cavity. Inside the receiving cavity are a perforated plate 300, a flame extinguishing disc support 142, a filter assembly 143, and a sealing gasket 144. The perforated plate 300 is located at the bottom and adjacent to the grid plate 12, while the flame extinguishing disc support 142 is located above the perforated plate 300, and the filter assembly 143 is located above the flame extinguishing disc support 142. Specifically, the perforated plate 300, the flame extinguishing disc support 142, and the filter assembly 143 are all located inside the support 141 and are stacked on top of each other. The sealing gasket 144 covers the opening of the support 141, and the arc-extinguishing cap 15 covers the sealing gasket 144, that is, the arc-extinguishing cap 15 and the support 141 clamp the sealing gasket 144. The sealing gasket 144 can seal the installation gap around the bracket 141 and the arc-extinguishing cover 15, thereby improving the airtightness of the assembly between the arc-extinguishing cover 15 and the bracket 141.

[0030] The bracket 141 is fixed to a pair of side plates 11, for example by snap-fit ​​or riveting. The bracket 141 is fixed to the arc-extinguishing cover 15 by screws, thereby integrating the orifice plate 300, the flame extinguishing disc bracket 142, the filter assembly 143, and the sealing gasket 144 into a single unit.

[0031] like Figure 3 , Figure 4 This is a side view of the arc-extinguishing chamber 1 and the contact system 2. The figure includes three directions: a first direction, a second direction, and a third direction, all perpendicular to each other. The first direction is the array direction of the grid plates 12, the second direction is the width direction of the grid plates 12, and the third direction is the height direction of the arc-extinguishing chamber, which can also be considered as the extension direction of the grid plates 12. See [link / reference] Figure 3In this configuration, the upper end of the grid plate 12 in the third direction is the air outlet, and the lower end is the air inlet. Multiple grid plates 12 are arranged in an array spaced apart from each other in the first direction. A movable arc-inducing plate 200 is located on the side of the array of grid plates 12 corresponding to the moving contact 21. The upper end of the movable arc-inducing plate 200 is located on the outer side of the array of grid plates 12 along the first direction, and its lower end extends into the arc-extinguishing chamber 1. The movable arc-inducing plate 200 is located on the periphery of the array of grid plates 12. An air passage, or arc passage, is formed on the side of the movable arc-inducing plate 200 near the grid plate 12. The arc near the movable arc-inducing plate 200 moves along the air passage by the traction of the movable arc-inducing plate 200 and enters the grid plates 12 on the side of the array of grid plates 12 near the movable arc-inducing plate 200. A gas-generating plate 201 is also installed on the lower end of the movable arc-inducing plate 200 near the moving contact 21. The perforated plate 300 is located at the air outlet end of the grid plate 12 and is adjacent to the grid plate 12.

[0032] like Figure 4 The grid plate 12 includes a notch 121, grid plate legs 122, and mounting bosses 123. The notch 121 is located between a pair of grid plate legs 122, while the mounting bosses 123 are located on both sides of the width direction of the grid plate 12, that is, on both sides of the second direction. The mounting bosses 123 are used for riveting with the side plate 11.

[0033] The perforated plate 300 is arrayed with vent holes, which form multiple first vent hole rows 301 and multiple second vent hole rows 302 in the width direction of the grid plate 12. Each first vent hole row 301 and each second vent hole row 302 corresponds to a gap between adjacent grid plates 12. In the array direction of the grid plates 12, i.e., the first direction, the first vent hole row 301 corresponds to the side of the moving contact 21 and includes circular holes 3011 and strip holes 3012; while the second vent hole row 302 corresponds to the side of the stationary contact 22 and includes only circular holes 3011. Due to the presence of strip holes 3012, which have better ventilation efficiency than circular holes 3011, it is beneficial for the electric arc to enter the grid plate 12 corresponding to the side of the moving contact 21.

[0034] Preferably, in the width direction of the grid 12, i.e., the second direction, the length of the strip hole 3012 is greater than the distribution length of the three circular holes 3011. Although in this embodiment, the diameters of the circular holes 3011 are not the same, the length occupied by the three circular holes 3011 in the second direction is the distribution length of the three circular holes 3011.

[0035] Preferably, in the array direction of the grid 12, the number of the first vent array 301 is greater than the number of the second vent array 302. More preferably, the number of the first vent array 301 is twice the number of the second vent array 302.

[0036] Preferably, in the height direction of the arc-extinguishing chamber 1, i.e., upward, the projection of the lower end of the moving arc-inducing plate 200 near the moving contact 21 on the orifice plate 300 is located within the distribution area of ​​the first vent row 301.

[0037] like Figure 5 In the first direction, the notches 121 on adjacent grid plates 12 are staggered. Specifically, in the second direction, one notch 121 on an adjacent grid plate 12 is located on the left and the other on the right. More specifically, with respect to the center line L of the grid plate 12 in the second direction, the notches 121 on adjacent grid plates 12 are located on both sides of the center line L, thus forming a staggered arrangement. Typically, after the grid plates 12 are manufactured, the aforementioned staggered notch 121 arrangement is achieved by flipping the adjacent grid plates 12.

[0038] In the width direction of the grid plate 12, i.e., the second direction, the strip hole 3012 of the first vent hole row 301 is located at one end of the second direction, while the strip hole 3012 of another first vent hole row 301 adjacent to the first vent hole row 301 is located at the other end of the second direction. For example, if the strip hole 3012 of one first vent hole row 301 is located at the left end, then the strip hole 3012 of the first vent hole row 301 adjacent to that first vent hole row 301 is located at the right end. That is, the strip holes 3012 of two adjacent first vent hole rows 301 are respectively located at both ends of the width direction of the grid plate 12, i.e., both ends of the second direction.

[0039] Preferably, there is only one strip hole 3012 in a first vent row 301.

[0040] Preferably, in the width direction of the grid plate 12, i.e., in the second direction, the length of the strip hole 3012 is less than half the length of the first vent hole row 301.

[0041] See you later Figure 5Regarding the array of grid plates 12, in the array direction of the grid plates 12, i.e., the first direction, the lower end of the array of grid plates 12 corresponds to one end of the moving contact 21, while the upper end of the array of grid plates 12 corresponds to one end of the stationary contact 22. The offset direction of the strip-shaped holes 3012 in the first vent array 301 is consistent with the offset direction of the notches 121 on the grid plates 12 near the moving contact 21 corresponding to the first vent array 301. For example, in Figure 5 If the strip hole 3012 in the first vent hole row 301 is located at the left end in the second direction, then the notch 121 of the grid plate 12 below it is also offset to the left; if the strip hole 3012 in the first vent hole row 301 is located at the right end in the second direction, then the notch 121 of the grid plate 12 below it is also offset to the right.

[0042] like Figure 6 During the arc opening process, the upper end of the array of grid plates 21 in the first direction corresponds to the stationary contact 22, and the lower end in the first direction corresponds to the moving contact 21. When the moving contact 21 separates from the stationary contact 22, an arc is generated between them. The arc extends from point A to point B as the moving contact 21 opens. During the above process, since the strip holes 3012 in the adjacent first vent array 301 are located at both ends of the width direction of the grid plate 12, i.e., at both ends of the second direction, the resulting airflow field stretches the arc into a Z-shape. At the same time, since the offset direction of the strip holes 3012 in the first vent array 301 is consistent with the offset direction of the notch 121 on the grid plate 12 near the moving contact 21 corresponding to the first vent array 301, the arc is stretched into a Z-shape. Thus, the Z-shaped arrangement of the array of grid plates 12, with its multiple notches 12 arranged in a matching shape, facilitates the rapid entry of the electric arc into the notches 12 of the grid plates 12, thereby enabling the electric arc to quickly enter the array of grid plates 12.

[0043] like Figure 7 This is a schematic diagram of the partition 100. The partition 100 is made of insulating material. The partition 100 is a pair, each attached to the inner surface of a pair of side plates 11. The inner surface refers to the two sides of the pair of side plates 11 that face each other.

[0044] The partition 100 is made of an insulating material that does not contain fiberglass. The side plate 11 is made of an insulating material that contains fiberglass. The two are bonded together, and the partition 100 is located inside the side plate 11. This arrangement prevents the side plate 11 from being burned by the electric arc and prevents particles from adhering to the grid plate 12 after being burned, thus affecting the normal operation of the grid plate 12. Furthermore, the retention of the side plate 11, which has high strength, ensures the structural stability of the arc-extinguishing chamber 1. The partition 100, which does not contain fiberglass, is located inside the side plate 11, preventing the side plate 11 from being burned by the electric arc and protecting it; therefore, the material composition of the side plate 11 is not a concern. Moreover, the partition 100 does not produce particles after being burned, and this will not affect the normal operation of the grid plate 12.

[0045] Combination Figure 2 , 4 Specifically, the partition 100 has an elbow 101 at the air outlet end corresponding to the grid plate 12, thus forming an "L" shape. The elbow 101 is flat and rests on the steps 124 on both sides of the air outlet end of the grid plate 12. The steps 124 are located on both sides of the end of the grid plate 12 closest to the perforated plate 300, that is, on both sides of the upper end of the grid plate 12 in the third direction.

[0046] A flange 125 is formed at the air outlet end of the grid plate 12. Specifically, the flange 125 is located between a pair of steps 124, and the front end of the flange 125 extends into the interior of the bracket 141 and abuts against the perforated plate 300. The elbow 101 abuts against the lower edge of the bracket 141.

[0047] Preferably, the shape of the partition 100 matches the shape of the side plate 11, so that, in the width direction of the grille 12, i.e., the second direction, the projection of the portion of the step 124 of the grille 12 facing the air inlet side of the grille 12 onto the side plate 11 is located inside the projection of the partition 100 onto the side plate 11. That is, the projection of the portion of the grille 12 located at the lower part of the step 124 in the third direction onto the side plate 11 is located inside the projection of the partition 100 onto the side plate 11. More preferably, in the width direction of the grille 12, i.e., the second direction, the projection of the movable arc-guiding plate 200 onto the side plate 11 is located inside the projection of the partition 100 onto the side plate 11.

[0048] The partition 100 has a first mating hole 102, a second mating hole 103, and a third mating hole 104. Specifically, the first mating hole 102 is used for the mounting boss 123 to pass through. Preferably, the shape of the first mating hole 102 matches that of the mounting boss 123, and both are square.

[0049] The second mating hole 103 is used for the installation end of the gas generating component 13 to pass through, that is, after the installation end of the gas generating component 13 passes through the second mating hole 103, it is riveted to the side plate 11.

[0050] The third mating hole 104 is used for the mounting end of the moving arc-guiding piece 200 to pass through, that is, after the mounting end of the moving arc-guiding piece 200 passes through the third mating hole 104, it is riveted to the side plate 11.

[0051] The partition 100 has a clearance recess 105 on the side near the gas generating component 13. That is, the partition 100 has a clearance recess 105 at its lower end in the third direction. The clearance recess 105 clears the contact surface between the gas generating component 13 and the side plate 11.

[0052] Preferably, after the partition 100 is installed, the partition 100 is clamped by the grid plate 12 and the side plate 11 to improve the installation and positioning effect of the partition 100.

Claims

1. An arc-extinguishing chamber, comprising a pair of side plates (11) and grid plates (12) disposed between the pair of side plates (11), wherein there are multiple grid plates (12) spaced apart from each other; characterized in that: It also includes a pair of partitions (100) made of insulating material that does not contain glass fiber, each partition (100) being attached to the inside of a side plate (11).

2. The arc-extinguishing chamber according to claim 1, characterized in that: The partition (100) is provided with an elbow (101) at the air outlet end corresponding to the grid plate (12), so that the partition (100) forms an "L" shape, and the elbow (101) is flat and rests on the steps (124) on both sides of the air outlet end of the grid plate (12).

3. The arc-extinguishing chamber according to claim 2, characterized in that: A perforated plate (300) and a deionization component (14) are also provided on one side of the air outlet of the grid plate (12). The deionization component (14) includes a bracket (141). The bracket (141) is hollow inside to form a receiving cavity. The perforated plate (300) is located inside the receiving cavity. A flange (125) is formed at the air outlet end of the grid plate (12). The flange (125) is located between a pair of steps (124). The front end of the flange (125) extends into the interior of the bracket (141) and abuts against the perforated plate (300). The elbow (101) abuts against the lower edge of the bracket (141).

4. The arc-extinguishing chamber according to claim 1, characterized in that: The grid plate (12) includes mounting bosses (123) located on both sides of the grid plate (12) in the width direction; the partition plate (100) has a first mating hole (102) for the mounting bosses (123) to pass through.

5. An arc-extinguishing chamber according to claim 1, characterized in that: A pair of gas generating elements (13) are provided on the air inlet side of the array grid (12), and a second mating hole (103) is also provided on the partition plate (100), the second mating hole (103) being used for the passing through the mounting end of the gas generating element (13).

6. An arc-extinguishing chamber according to claim 1, characterized in that: A movable arc-inducing plate (200) is provided on one side of the array of grid plates (12). The upper end of the movable arc-inducing plate (200) is located outside the array of grid plates (12) along the array direction of the grid plates (12), and its lower end extends into the arc-extinguishing chamber (1). A third mating hole (104) is also provided on the partition plate (100), which is used for the passage of the mounting end of the movable arc-inducing plate (200).

7. An arc-extinguishing chamber according to claim 1, characterized in that: A pair of gas generating elements (13) are provided on the air inlet side of the grid plate (12) of the array. The partition plate (100) is provided with a relief recess (105) on the side near the gas generating element (13). The relief recess (105) allows the contact surface between the gas generating element (13) and the side plate (11) to be separated.

8. An arc-extinguishing chamber according to claim 1, characterized in that: The partition (100) is held between the grid plate (12) and the side plate (11).

9. An arc-extinguishing chamber according to claim 1, characterized in that: A movable arc-inducing plate (200) is provided on one side of the array of grid plates (12). The upper end of the movable arc-inducing plate (200) is located outside the array of grid plates (12) along the array direction of the grid plates (12), and its lower end extends into the arc-extinguishing chamber (1). In the width direction of the grid plates (12), the projection of the movable arc-inducing plate (200) on the side plate (11) is located inside the projection of the partition plate (100) on the side plate (11).

10. An arc-extinguishing chamber according to claim 1, characterized in that: The side panel (11) is made of an insulating material containing glass fiber.

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