A multi-layer composite arc-extinguishing grid structure

Abstract

This utility model discloses a multi-layer composite arc-extinguishing grid structure, including a shell, with a uniformly distributed assembly frame installed on the upper side of the shell. The left and right walls of the shell are provided with uniformly distributed slot 1, and the left and right walls of the assembly frame are each provided with slot 2. Metal grids are engaged between adjacent slot 1 and adjacent slot 2 laterally. The structure also includes a reinforcing mechanism; the reinforcing mechanism includes slots, inserts, and locking components. The slots are respectively located at the middle of the left and right ends of the metal grids. This multi-layer composite arc-extinguishing grid structure increases the number of arc segments in the overall arc-extinguishing grid structure through the assembly of the arc-extinguishing grids, thereby increasing the overall arc resistance and accelerating the arc extinguishing speed. Simultaneously, the device reinforces the engaged arc-extinguishing grids through multiple insertions, reducing the risk of the arc-extinguishing grids falling off during use.

Description

Technical Field

[0001] This utility model relates to the field of arc-extinguishing circuit breaker technology, specifically a multi-layer composite arc-extinguishing grid structure. Background Technology

[0002] Arc extinguishing in circuit breakers refers to extinguishing the electric arc between the moving and stationary contacts. Arc-extinguishing grids are one of the basic methods for extinguishing arcs in circuit breakers. In AC low-voltage switchgear, when an arc is generated between the contacts, the arc is drawn into the arc-extinguishing grids under the contraction force of magnetic lines of force, dividing a long arc into multiple short arcs. When the AC current crosses zero, all short arcs are extinguished simultaneously. (Existing technology: Authorization Publication No. CN 222421854) U's patent discloses a double-break arc-extinguishing structure and circuit breaker with a composite arc-extinguishing chamber. The double-break arc-extinguishing structure incorporates a metal grid arc-extinguishing chamber and a double-insulated narrow-slit arc-extinguishing chamber. This effectively combines the cutting effect of the metal grid on high-current arcs with the compression and cooling effect of the insulating narrow slits on low-current arcs. It also avoids the damage caused by repeated arc erosion of the metal grid arc-extinguishing chamber under rated current and the poor effect of high-current arcs entering the narrow slits. To ensure that bidirectional DC currents can quickly enter both arc-extinguishing chambers, this invention employs a permanent magnet, a U-shaped magnetic plate, and a moving arc-running track. In combination, a magnetic field force is generated that can drive both bidirectional current arcs toward the arc-extinguishing chamber. This utility model combines the advantages of metal grid arc-extinguishing chamber and double-insulated narrow-slit arc-extinguishing chamber, solving the problem that the metal grid is damaged after repeated DC arc ablation, affecting its service life. The structure is simple and easy to implement. However, the metal grid of this device is connected to the insulating plate by a snap-fit ​​method. When the device is impacted, the snap-fit ​​part is easy to come out of the slot, which will cause the metal grid to fall off the insulating plate. Therefore, we propose a multi-layer composite arc-extinguishing grid structure. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a multi-layer composite arc-extinguishing grid structure. This device increases the number of arc segments of the overall arc-extinguishing grid by assembling the arc-extinguishing grid, thereby increasing the overall arc resistance and accelerating the arc extinguishing speed. At the same time, the device reinforces the arc-extinguishing grid by multiple insertions, thereby reducing the risk of the arc-extinguishing grid falling off during use. This can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a multi-layer composite arc-extinguishing grid structure, including a shell, an assembly frame evenly distributed on the upper side of the shell, a slot 1 evenly distributed on the left and right walls of the shell, a slot 2 on the left and right walls of the assembly frame, metal grids being snapped between adjacent slot 1 and adjacent slot 2, and a reinforcing mechanism. The reinforcement mechanism includes slots, inserts, and locking components. The slots are respectively located at the middle of the left and right ends of the metal grid. An insert is inserted between each vertically adjacent slot. Locking components are provided between the inserts and the outer shell. This device increases the number of arc segments of the overall arc-extinguishing grid by assembling the arc-extinguishing grid, thereby increasing the overall arc resistance and accelerating the arc extinguishing speed. At the same time, the device reinforces the arc-extinguishing grid by inserting it multiple times, thereby reducing the risk of the arc-extinguishing grid falling off during use.

[0005] Furthermore, dovetail grooves are provided on the upper left and right ends of the outer shell and the upper left and right ends of the assembly frame, and dovetail seats are provided on the lower left and right ends of the assembly frame. The dovetail seats are slidably connected to the vertically adjacent dovetail grooves to splice the assembly frame within the multi-layer composite arc-extinguishing grid structure.

[0006] Furthermore, the reinforcement mechanism also includes guide ramps, which are respectively opened at the lower outer edge of the insert. By reducing the diameter, the insert inside the multi-layer composite arc-extinguishing grid structure can pass through the slot.

[0007] Furthermore, the locking assembly includes a socket, a fixing seat, a plug rod, a lever, and a spring. The socket is respectively opened at the lower middle part of the plug bar. Fixing seats are provided on both the left and right sides of the outer shell. A plug rod is slidably connected in the circular hole in the middle of the fixing seat. The plug rod is inserted into the adjacent socket. A lever is provided at the rear end of the plug rod. A spring is provided between the lever and the longitudinally adjacent fixing seat. The spring is movably sleeved on the outer end of the adjacent plug rod to vertically lock the plug bar in the multi-layer composite arc-extinguishing grid structure.

[0008] Furthermore, the reinforcement mechanism also includes a limiting seat, which is respectively disposed on the lower ends of the left and right sides of the outer shell. The limiting seat is installed in conjunction with the vertically adjacent insert, thereby limiting the vertical position of the insert within the multi-layer composite arc-extinguishing grid structure.

[0009] Furthermore, ventilation holes are provided at both the rear left and right ends of the outer shell and the rear left and right ends of the assembly frame to prevent the risk of explosion due to a sudden increase in air pressure.

[0010] Furthermore, the outer sides of both the outer shell and the assembly frame are coated with an alumina ceramic coating to improve the insulation and wear resistance of the inner and outer shells and the assembly frame of the multi-layer composite arc-extinguishing grid structure.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This multi-layer composite arc-extinguishing grid structure has the following advantages: 1. When using a multi-layer composite arc-extinguishing grid structure, the number of arc-extinguishing grids in the whole device can be increased by assembling the frame, thereby increasing the number of arc segments of the whole arc-extinguishing grid, and thus increasing the overall arc resistance and accelerating the arc extinguishing speed.

[0012] 2. When using a multi-layer composite arc-extinguishing grid structure, the device uses a reinforcement mechanism to install and reinforce the snap-fit ​​arc-extinguishing grid by means of plug-in limiting and re-locking the limiting element, thereby reducing the risk of the arc-extinguishing grid falling off during use. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the rear structure of this utility model; Figure 3 This is a schematic diagram of the assembly frame structure of this utility model; Figure 4 This is a schematic diagram of the metal grid structure of this utility model; Figure 5 This is an enlarged structural diagram of point A in this utility model.

[0014] In the diagram: 1. Outer shell, 2. Assembly frame, 3. Dovetail groove, 4. Dovetail base, 5. Metal grid plate, 6. Reinforcing mechanism, 61. Slot, 62. Insert strip, 63. Guide slope, 64. Locking assembly, 641. Insertion hole, 642. Fixing base, 643. Insert rod, 644. Pulley, 645. Spring, 65. Limiting seat, 7. Vent hole. Detailed Implementation

[0015] 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.

[0016] Please see Figure 1-5This embodiment provides a technical solution: a multi-layer composite arc-extinguishing grid structure, including a shell 1, with uniformly distributed assembly frames 2 installed on the upper side of the shell 1, uniformly distributed slots 1 on the left and right walls of the shell 1, and slots 2 on the left and right walls of the assembly frame 2. Metal grid plates 5 are engaged between adjacent slots 1 and adjacent slots 2 in the horizontal direction. Dovetail grooves 3 are provided at the upper left and right ends of the shell 1 and the upper left and right ends of the assembly frame 2, and dovetails are provided at the lower left and right ends of the assembly frame 2. Seat 4 and dovetail seat 4 are slidably connected to the vertically adjacent dovetail groove 3. Ventilation holes 7 are provided at both ends of the rear left and right sides of the outer shell 1 and the rear left and right sides of the assembly frame 2. The outer sides of the outer shell 1 and the assembly frame 2 are coated with an alumina ceramic coating. When using multi-layer composite arc-extinguishing grid plates, the staff first selects an appropriate number of assembly frames 2 according to the usage environment. Then, the metal grid plates 5 are respectively snapped into the horizontally adjacent slot 1 of the outer shell 1 and the slot 2 on the assembly frame 2. Then, the staff pushes the assembly frame 2 through the bottom dovetail groove. The tailstock 4 slides longitudinally from back to front into the dovetail groove 3 on the top of the outer shell 1, thus realizing the assembly operation between the two. Then, the workers assemble two vertically adjacent assembly frames 2 in the same way, thus realizing the assembly operation between multiple assembly frames 2 and the outer shell 1. By increasing the number of metal grids 5 on the outer shell 1 through the assembly frames 2, the multi-layered metal grids 5 divide the arc generated by the short circuit of the circuit breaker into more short arcs in series. By increasing the overall arc resistance, the arc extinguishing speed is accelerated. During the use of the device, the arc gas is promoted to be discharged through the vent 7, which can prevent the risk of explosion due to sudden increase in gas pressure. The alumina ceramic coating has excellent wear resistance and insulation. By spraying the alumina ceramic coating, the insulation and wear resistance of the outer shell 1 and the assembly frame 2 are increased. The device increases the number of arc segments of the arc extinguishing grid through the assembly operation of the arc extinguishing grid, thereby increasing the overall arc resistance and accelerating the arc extinguishing speed. It also includes a reinforcement mechanism 6. The reinforcement mechanism 6 includes slots 61, inserts 62, and locking components 64. Slots 61 are respectively located at the middle of the left and right ends of the metal grid 5. An insert 62 is inserted between vertically adjacent slots 61. Locking components 64 are provided between the inserts 62 and the outer casing 1. The reinforcement mechanism 6 also includes guide ramps 63, which are respectively located at the lower outer edge of the inserts 62. The locking component 64 includes insertion holes 641, fixing seats 642, insert rods 643, a lever 644, and a spring 645. Insert holes 641 are respectively located at the lower middle end of the inserts 62. Fixing seats 642 are provided on both the left and right sides of the outer casing 1. 2. Each of the centrally located circular holes has a slidingly connected insertion rod 643. Each insertion rod 643 is inserted into an adjacent insertion hole 641. Each insertion rod 643 has a lever plate 644 at its rear end. Each lever plate 644 and the longitudinally adjacent fixed seat 642 is equipped with a spring 645. Each spring 645 is movably sleeved on the outer end of the adjacent insertion rod 643. The reinforcement mechanism 6 also includes a limiting seat 65, which is respectively located on the lower left and right sides of the outer shell 1. Each limiting seat 65 is installed in conjunction with the vertically adjacent insertion bar 62. When the operator simultaneously moves the two lever plates 644 backward, it causes the corresponding insertion rod 643 to move longitudinally backward, and the spring 645 elastically stretches (spring 64... 5 is always in a stretched state), thus avoiding interference from the insertion rod 643 with the subsequent vertical insertion of the insertion strip 62 and slot 61. Then, the staff inserts the insertion strip 62 sequentially from top to bottom along the vertically adjacent slots 61 between the metal grid plates 5. By inserting the insertion strip 62 into the slot 61, the engagement between the metal grid plate 5 and the slot is locked and reinforced, preventing separation. At the same time, as the insertion strip 62 moves vertically downward, the guide slope 63 reduces the diameter of the bottom of the insertion strip 62, making it easier for the bottom of the insertion strip 62 to pass through the corresponding slot 61. When the insertion strip 62 moves vertically downward to the vertically adjacent limit seat... When contact is made at 65, the insertion rod 643 is horizontally aligned with the longitudinally adjacent slot 61. Then, the external force applied to the lever plate 644 is released, and the spring 645 is stretched and reset, causing the insertion rod 643 to automatically engage with the adjacent slot 61, thereby locking the vertical movement of the insertion strip 62. After the device has been used for a period of time, the fixing seat 642 and its upper components are replaced (the fixing seat 642 is fixed to the side of the outer casing 1 by bolts) to prevent the spring 645 from aging after long-term use. The device reinforces the arc-extinguishing grid plate by repeated insertion and connection, thereby reducing the risk of the arc-extinguishing grid plate falling off during use.

[0017] The working principle of the multi-layer composite arc-extinguishing grid structure provided by this utility model is as follows: When using the multi-layer composite arc-extinguishing grid, the operator first selects an appropriate number of assembly frames 2 according to the usage environment. Then, the metal grid plates 5 are respectively snapped into the horizontally adjacent slot 1 of the outer shell 1 and the slot 2 on the assembly frame 2. Then, the operator slides the assembly frame 2 vertically from back to front through the dovetail seat 4 at the bottom to the dovetail groove 3 on the top of the outer shell 1, thereby realizing the assembly operation between the two. Then, the operator assembles two vertically adjacent assembly frames 2 in the same way, thereby realizing the connection between multiple assembly frames 2 and the outer shell 1. In the splicing operation, the number of metal grids 5 on the outer shell 1 is increased by assembling frame 2, so that the multi-layered metal grids 5 divide the arc generated by the short circuit of the circuit breaker into more short arcs in series. By increasing the overall arc resistance, the arc extinguishing speed is accelerated. Then, the operator simultaneously moves two levers 644 backward, causing the corresponding plug rod 643 to move longitudinally backward. The spring 645 is elastically stretched (the spring 645 is always in a stretched state), thereby avoiding interference from the plug rod 643 to the vertical insertion of the subsequent plug strip 62 and slot 61. Then, the operator moves the plug strip 62 along the vertically adjacent metal grids 5. The slots 61 are inserted sequentially from top to bottom, and the insert 62 is inserted into the slot 61, thereby locking and reinforcing the engagement between the metal grid 5 and the slot, preventing separation. Simultaneously, as the insert 62 moves vertically downwards, the guide slope 63 reduces the diameter of the bottom of the insert 62, making it easier for the bottom of the insert 62 to pass through the corresponding slot 61. When the insert 62 moves vertically downwards and contacts the vertically adjacent limit seat 65, the insert rod 643 is horizontally aligned with the longitudinally adjacent slot 61. Then, the external force applied to the lever plate 644 is released, and the spring 645 returns to its original position. Force is applied to automatically insert the plug 643 into the adjacent slot 61, thereby locking the plug 62 vertically. During use, the vent 7 promotes the discharge of arc gas, preventing the risk of explosion due to sudden pressure increase. After a period of use, the fixing seat 642 and its upper components are replaced (the fixing seat 642 is fixed to the side of the outer shell 1 by bolts) to avoid aging of the spring 645 after long-term use. The alumina ceramic coating has excellent wear resistance and insulation. The alumina ceramic coating increases the insulation and wear resistance of the outer shell 1 and the assembly frame 2.

[0018] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A multi-layer composite arc-extinguishing fin structure, characterized by: The device includes an outer shell (1), on the upper side of which is a uniformly distributed assembly frame (2), and on the left and right walls of the outer shell (1) are uniformly distributed slots 1. On the left and right walls of the assembly frame (2), slots 2 are opened. Metal grid plates (5) are snapped between the horizontally adjacent slots 1 and between the horizontally adjacent slots 2. The device also includes a reinforcing mechanism (6). The reinforcement mechanism (6) includes a slot (61), a strip (62) and a locking component (64). The slots (61) are respectively opened at the middle of the left and right ends of the metal grid (5). A strip (62) is inserted between each vertically adjacent slot (61). A locking component (64) is provided between the strip (62) and the outer shell (1).

2. A multi-layer composite arc-extinguishing grid structure according to claim 1, characterized in that: The upper left and right ends of the outer shell (1) and the upper left and right ends of the assembly frame (2) are provided with dovetail grooves (3), and the lower left and right ends of the assembly frame (2) are provided with dovetail seats (4). The dovetail seats (4) are slidably connected to the vertically adjacent dovetail grooves (3).

3. The multi-layer composite arc-extinguishing grid structure according to claim 1, characterized in that: The reinforcement mechanism (6) also includes guide ramps (63), which are respectively opened at the lower outer edge of the insert (62).

4. The multi-layer composite arc-extinguishing grid structure of claim 1, wherein: The locking assembly (64) includes a socket (641), a fixing seat (642), a plug rod (643), a lever (644), and a spring (645). The socket (641) is respectively opened at the lower middle part of the plug bar (62). The fixing seats (642) are provided on both the left and right sides of the outer shell (1). The plug rod (643) is slidably connected in the round hole opened in the middle of the fixing seat (642). The plug rod (643) is inserted into the adjacent socket (641). The rear end of the plug rod (643) is provided with a lever (644). The lever (644) and the longitudinally adjacent fixing seat (642) are provided with a spring (645). The spring (645) is movably sleeved on the outer end of the adjacent plug rod (643).

5. The multi-layer composite arc barrier grid structure of claim 1, wherein: The reinforcement mechanism (6) also includes a limiting seat (65), which is respectively located at the lower ends of the left and right sides of the outer shell (1). The limiting seat (65) is installed in conjunction with the vertically adjacent insert (62).

6. The multi-layer composite arc barrier grid structure of claim 1, wherein: Ventilation holes (7) are provided at both the left and right rear ends of the outer shell (1) and the left and right rear ends of the assembly frame (2).

7. The multi-layer composite arc barrier grid structure of claim 1, wherein: The outer sides of the outer shell (1) and the assembly frame (2) are both coated with an alumina ceramic coating.

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