An alternating current contactor arc starting sheet

Abstract

This utility model discloses an arc-starting plate for an AC contactor, relating to the field of arc-starting plate technology. It includes an arc-extinguishing cover and multiple grid-type arc-starting plates. A limiting strip is provided on the front side of the arc-extinguishing cover, with a limiting groove in the middle. L-shaped rods are fixedly connected to both ends of the limiting strip. Sliding grooves are provided on both side walls of the arc-extinguishing cover, with sliders slidably connected inside the grooves. A lifting plate is fixedly connected to one side wall of the slider. This utility model, by setting sliders and lifting plates that slide on the side walls of the arc-extinguishing cover, along with the limiting strip and limiting grooves, allows for the use of wastewater alcohol wiping pads to pass through the limiting grooves during cleaning to wipe the surface of the grid-type arc-starting plates. Because the wiping pads pass through the limiting grooves, the limiting strip restricts the wiping angle and position, preventing excessive wiping amplitude that could cause deformation and bending of the grid-type arc-starting plates. This controls the cleaning amplitude and angle, ensuring that the grid-type arc-starting plates are not deformed during cleaning.

Description

Technical Field

[0001] This utility model relates to the field of arc ignition sheet technology, and in particular to an arc ignition sheet for an AC contactor. Background Technology

[0002] The core principle of the contactor's arc-initiating plate is to guide the electric arc using electromagnetic force and accelerate the arc extinguishing through grid segmentation and cooling, thereby protecting the contacts from arc damage. Its design integrates the principles of electromagnetics, thermodynamics, and materials science, and is a key guarantee for the reliable operation of the contactor.

[0003] Currently, during long-term use, dust and carbonized powder accumulate on the surface of the contactor's arc ignition plates, which can easily affect their functionality. Cleaning is usually done by operators using lint-free cloths soaked in anhydrous alcohol. However, due to hand tremors and uneven wiping pressure, the wiping amplitude is often too large, and the wiping angle is off-center. This can cause the arc ignition plates to deform and bend, affecting their subsequent functionality. Furthermore, the grid-type arc ignition plates are arranged in multiple layers at equal intervals, causing mutual obstruction and making it difficult to observe and maintain the surface ablation condition. Utility Model Content

[0004] The purpose of this invention is to provide an arc-starting piece for an AC contactor to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an arc-quenching plate for an AC contactor, comprising an arc-extinguishing cover and a plurality of grid-type arc-quenching plates, wherein a limiting strip is provided on the front side of the arc-extinguishing cover, a limiting groove is provided in the middle of the limiting strip, and L-shaped rods are fixedly connected to both ends of the limiting strip; sliding grooves are provided on both side walls of the arc-quenching cover, and a slider is slidably connected inside the sliding groove; a lifting plate is fixedly connected to one side wall of the slider.

[0006] The back of the arc-extinguishing hood is provided with multiple strip-shaped grooves, and each of the multiple strip-shaped grooves is provided with a strip-shaped plate. A grinding plate is fixedly connected to the inner wall of the top of the strip-shaped groove, and an inclined plate is fixedly connected to the middle of the back of each of the multiple strip-shaped plates.

[0007] As a preferred embodiment of this utility model, one end of each of the two L-shaped rods is fixedly connected to an insert rod, and the middle part of the insert rod is inserted and connected to the middle part of the lifting plate.

[0008] With the above technical solution, the L-shaped rod can be connected to the lifting plate by means of the plug rod. Therefore, when the arc-inducing plate is working normally, the limit strip can be disassembled and then quickly reassembled during inspection and maintenance.

[0009] As a preferred technical solution of this utility model, multiple pairs of rubber protrusions are fixedly connected at equal intervals on both sides of the inner wall of the slide groove, and the two sides of the slider are in contact with the surface of the rubber protrusions.

[0010] Through the above technical solution, the rubber protrusions can increase resistance, thus providing a distinct tactile feel, allowing the operator to quickly position the slider when pushing it, while increasing friction to stabilize the slider at multiple fixed points in sequence.

[0011] As a preferred embodiment of this utility model, a plurality of the grid-type arc-inducing plates are equidistantly arranged inside the arc-extinguishing shroud, and the back sides of the plurality of grid-type arc-inducing plates are respectively fixedly connected to the front sides of a plurality of strip plates.

[0012] Through the above technical solution, multiple grid-type arc-initiating plates are installed inside the arc-extinguishing shroud using strip plates.

[0013] As a preferred embodiment of this utility model, a tool groove is provided at the top of the inclined plate.

[0014] The above technical solution allows the tool slot to be matched with tools such as screwdrivers used in contactor maintenance. When a screwdriver is inserted into the tool slot, it can move the inclined plate.

[0015] As a preferred embodiment of this utility model, a positioning rod is fixedly connected to the bottom of the back side of the strip plate, and one end of the positioning rod is inserted and connected to the back side of the arc extinguishing cover.

[0016] With the above technical solution, when the strip plate is pushed into the strip groove, the positioning rod is inserted into the back of the arc extinguishing cover to achieve further locking connection.

[0017] As a preferred embodiment of this utility model, the inner width of the limiting groove is the same as the spacing between two adjacent grid-type arc-inducing plates.

[0018] The above technical solution limits the wiping range of the wiping pad, preventing excessive wiping from causing the arc-inducing pad to bend and deform.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] This invention, by setting a slider and a lifting plate that slide on the side wall of the arc extinguishing hood, along with a limiting strip and a limiting groove, allows the wastewater alcohol wiping pad to pass through the limiting groove during the cleaning process to wipe and clean the surface of the grid-type arc ignition plate. Because it passes through the limiting groove, the limiting strip restricts the wiping angle and position, preventing the grid-type arc ignition plate from deforming and bending due to excessive wiping amplitude. It controls the cleaning amplitude and angle, ensuring that the grid-type arc ignition plate does not deform during cleaning.

[0021] This invention, by setting multiple strip plates, along with inclined plates and tool slots, allows for the quick pulling out of multiple grid-type arc-starting plates one by one for inspection, using a screwdriver. The surface condition of the current grid-type arc-starting plates is checked for burn pits or melting marks; plates with a burn depth exceeding 1mm require replacement. The included grinding plate cleans and polishes the surface of the grid-type arc-starting plates during repeated pulling, removing stubborn dirt and impurities. Thus, while inspecting the burn condition of multiple grid-type arc-starting plates, further surface cleaning can be performed simultaneously, facilitating rapid maintenance of the grid-type arc-starting plates. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the slide groove of this utility model;

[0024] Figure 3 This is a schematic diagram of the limiting groove of this utility model;

[0025] Figure 4 This is a schematic diagram of the inclined plate of this utility model.

[0026] In the diagram: 1. Arc extinguishing cover; 2. Grid-type arc ignition plate; 3. Slide groove; 4. Lifting plate; 5. L-shaped rod; 6. Limiting strip; 7. Rubber protrusion; 8. Slider; 9. Strip plate; 10. Positioning rod; 11. Inclined plate; 12. Tool groove; 13. Grinding plate; 14. Insert rod; 15. Limiting groove. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figures 1 to 4 This utility model provides a technical solution for an arc-starting piece in an AC contactor: Example

[0029] according to Figure 1 , Figure 2 and Figure 3As shown, an arc-extinguishing plate for an AC contactor includes an arc-extinguishing cover 1 and multiple grid-type arc-extinguishing plates 2. A limiting strip 6 is provided on the front side of the arc-extinguishing cover 1, and a limiting groove 15 is provided in the middle of the limiting strip 6. L-shaped rods 5 are fixedly connected to both ends of the limiting strip 6. Sliding grooves 3 are provided on both sides of the arc-extinguishing cover 1. A slider 8 is slidably connected inside the sliding groove 3. There is a certain friction at the sliding connection. The rubber protrusion 7 provides greater frictional resistance. Therefore, the operator needs to push the slider 8 with force each time it reaches the position of the rubber protrusion 7. As a result, the operator's tactile feedback is obvious, so as to clearly reach the gap position of the two grid-type arc-extinguishing plates 2. At this time, cleaning work can be carried out. A lifting plate 4 is fixedly connected to one side wall of the slider 8.

[0030] One end of each of the two L-shaped rods 5 is fixedly connected to a plug rod 14. The middle part of the plug rod 14 is inserted and connected to the middle part of the lifting plate 4. Multiple pairs of rubber protrusions 7 are fixedly connected at equal intervals on both sides of the inner wall of the slide groove 3. The two sides of the slider 8 are in contact with the surface of the rubber protrusions 7. Multiple grid-type arc-inducing plates 2 are equidistantly arranged inside the arc-extinguishing cover 1. The back of the multiple grid-type arc-inducing plates 2 is fixedly connected to the front of multiple strip plates 9 respectively.

[0031] In practical use, this utility model relates to an AC contactor arc ignition plate. Multiple grid-type arc ignition plates 2 are installed inside the arc extinguishing chamber 1 using multiple strip plates 9. After long-term use, carbon deposits (black powder) and dust may accumulate on the surface of the grid-type arc ignition plates 2. At this time, the operator can adjust the lifting and lowering movement of the limiting strip 6 so that the limiting groove 15 aligns sequentially with the gaps between the multiple grid-type arc ignition plates 2. Specifically, this adjustment can be achieved by adjusting the slider 8 to slide within the slide groove 3. When the slider 8 is obstructed, it touches the rubber protrusion 7, thus aligning with the gaps between a pair of grid-type arc ignition plates 2. The operator can then forcefully push the slider 8 to lock it into place on the pair of rubber protrusions. Between 7, the limiting groove 15 is now aligned with the gap between one pair of grid-type arc-inducing plates 2. At this point, the wastewater alcohol wiping pad can be passed through the limiting groove 15 to wipe and clean the surface of the grid-type arc-inducing plate 2. Because it passes through the limiting groove 15, the limiting strip 6 restricts the wiping angle and position, preventing the wiping process from being too large and causing the grid-type arc-inducing plate 2 to deform and bend. The cleaning amplitude and angle are controlled, ensuring that the grid-type arc-inducing plate 2 is not deformed while cleaning. The operator can follow the same steps to gradually push the slider 8 to move between each pair of rubber protrusions 7, thereby aligning the limiting groove 15 with the gap between multiple grid-type arc-inducing plates 2 for cleaning. Example

[0032] Based on Example 1, such as Figure 1 and Figure 4As shown, the back of the arc-extinguishing cover 1 has multiple strip grooves, and each of the multiple strip grooves has a strip plate 9 inside. A grinding plate 13 is fixedly connected to the inner wall of the top of the strip groove. The grinding plate 13 uses silicon carbide (SiC) abrasive with a particle size of 80# and phenolic resin as the binder. The surface roughness Ra=1.6μm and the grinding efficiency is 0.1mm² / s (for copper). An inclined plate 11 is fixedly connected to the middle of the back of each of the multiple strip plates 9. A tool groove 12 is opened at the top of the inclined plate 11. The tool groove 12 is adapted to a PH2 Phillips screwdriver. The groove depth is 5mm to prevent slippage. A positioning rod 10 is fixedly connected to the bottom of the back of the strip plate 9. One end of the positioning rod 10 is inserted and connected to the back of the arc-extinguishing cover 1. The inner width of the limiting groove 15 is the same as the spacing between two adjacent grid-type arc-inducing plates 2.

[0033] In practical use, this utility model of an AC contactor arc ignition piece allows the operator to use a screwdriver inserted into the tool slot 12 of the inclined plate 11 to push the inclined plate 11 and pull out the corresponding side of the arc ignition piece 2 during the inspection and maintenance of multiple grid-type arc ignition pieces 2. This allows for inspection of the surface condition of the current arc ignition piece 2, checking for burn pits or melting marks. If the burn depth exceeds 1mm, it needs to be replaced. The same steps can be used to inspect multiple arc ignition pieces 2 in sequence. During the pulling process, the surface of the arc ignition piece 2 will adhere to the strip groove. The grinding plate 13 set on the inner wall of the top of the strip groove can clean and grind the surface of the arc ignition piece 2 during repeated pulling and pulling, removing stubborn dirt and impurities. In this way, while inspecting the burn condition of multiple arc ignition pieces 2, the surface impurities can also be further removed simultaneously, facilitating quick maintenance of the arc ignition pieces 2.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "a solution," "some solutions," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that solution or example is included in at least one solution or example of this invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same solution or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more solutions or examples.

Claims

1. An AC contactor arc starter comprising an arc chute (1) and a plurality of grid-type arc starters (2), characterized in that: The front side of the arc extinguishing cover (1) is provided with a limiting strip (6), and a limiting groove (15) is opened in the middle of the limiting strip (6). Both ends of the limiting strip (6) are fixedly connected with L-shaped rods (5). Both sides of the arc extinguishing cover (1) are provided with sliding grooves (3). A slider (8) is slidably connected inside the sliding groove (3). A lifting plate (4) is fixedly connected to one side wall of the slider (8). The back of the arc extinguishing cover (1) is provided with multiple strip grooves, and each of the multiple strip grooves is provided with a strip plate (9). A grinding plate (13) is fixedly connected to the inner wall of the top of the strip groove, and an inclined plate (11) is fixedly connected to the middle of the back of each of the multiple strip plates (9).

2. An AC contactor arc starter according to claim 1, characterized in that: One end of each of the two L-shaped rods (5) is fixedly connected to a plug rod (14), and the middle part of the plug rod (14) is inserted and connected to the middle part of the lifting plate (4).

3. An AC contactor arc starter according to claim 1, characterized in that: Multiple pairs of rubber protrusions (7) are fixedly connected at equal intervals on both sides of the inner wall of the slide groove (3), and the two sides of the slider (8) are in contact with the surface of the rubber protrusions (7).

4. An AC contactor arc starter according to claim 1, wherein: Multiple grid-type arc-inducing plates (2) are equidistantly arranged inside the arc-extinguishing cover (1), and the back sides of the multiple grid-type arc-inducing plates (2) are respectively fixedly connected to the front sides of multiple strip plates (9).

5. An AC contactor arc starter according to claim 1, wherein: The top of the inclined plate (11) is provided with a tool slot (12).

6. An AC contactor arc starter according to claim 1, wherein: A positioning rod (10) is fixedly connected to the bottom of the back side of the strip plate (9), and one end of the positioning rod (10) is inserted and connected to the back side of the arc extinguishing cover (1).

7. An AC contactor arc starter according to claim 1, wherein: The inner width of the limiting groove (15) is the same as the spacing between two adjacent grid-type arc-leading plates (2).

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