Arc extinguishing cover with good stability

Abstract

The utility model discloses an arc extinguishing cover with good stability performance relates to arc extinguishing cover technical field, this arc extinguishing cover with good stability performance is through setting up the heat dissipation mechanism in left shell, left inner casing, right shell and right inner casing inside and setting up the exhaust mechanism of left shell top end's setting, when contact separates and produces electric arc, high temperature high pressure gas penetrates the air -permeable hole of left inner casing and right inner casing surface, enters the interlayer annular channel formed by double -wall, gas mixes the airflow of tangential inlet introduction in annular channel and forms high -speed cyclone, and the full contact metal wall surface realizes high -efficient heat dissipation, and the interlayer space absorbs arc pressure impact simultaneously and reduces the temperature of outer wall significantly, and the high pressure gas accumulated in annular channel rises to the exhaust port of left shell and right shell top end, and overcomes the small spring tension and opens the baffle, and the hot gas and metal particle directional discharge, and the arc is extinguished, and the pressure drops, and the small spring pulls the baffle and closes exhaust port closely.

Description

Technical Field

[0001] This utility model relates to the field of arc extinguishing cover technology, specifically to an arc extinguishing cover with good stability. Background Technology

[0002] An arc extinguishing chamber is a commonly used device that brings the electric arc into contact with a solid medium, reducing the arc temperature and thus accelerating the extinguishing of the arc.

[0003] Utility model patent CN217008986U discloses an arc-extinguishing cover with stable performance, comprising an arc-extinguishing cover, a base plate, and a mounting plate. The base plate is fixedly installed at the bottom of the arc-extinguishing cover, and the mounting plate is installed on the left and right sides of the bottom of the arc-extinguishing cover. Several slots are formed on the inner wall of the arc-extinguishing cover, and arc-extinguishing grid plates are movably connected to these slots. Limiting blocks that cooperate with the slots are provided on both sides of the arc-extinguishing grid plates. Slider blocks are provided on the side walls of the limiting blocks, and slide rails are provided on the slots to cooperate with the sliding sliders. The arc-extinguishing grid plates are inserted into the slots of the arc-extinguishing cover through the limiting blocks, and the sliders on the limiting blocks are inserted along the slide rails on the slots, further ensuring a tight fit between the limiting blocks of the arc-extinguishing grid plates and the slots of the arc-extinguishing cover, thereby enhancing the arc-extinguishing effect of the arc-extinguishing cover.

[0004] However, the airflow circulation efficiency of the arc extinguishing cover heat dissipation mechanism is insufficient, which means that the high-temperature gas of the electric arc cannot be cooled quickly. Long-term heat accumulation in the metal parts can easily cause the material to overheat and age. At the same time, the slow drop in arc temperature leads to a longer recovery time of the medium, which poses certain safety issues. Utility Model Content

[0005] This invention provides an arc-extinguishing shroud with good stability to solve the problems of insufficient airflow circulation efficiency of the existing arc-extinguishing shroud heat dissipation mechanism, which leads to the inability to quickly cool the high-temperature gas of the electric arc, and the long-term heat accumulation of metal parts, which can easily cause the material to overheat and age. At the same time, the slow drop in arc temperature leads to a prolonged medium recovery time, which poses certain safety issues.

[0006] This utility model provides the following technical solution: an arc-extinguishing cover with good stability, comprising a left outer shell and a left inner shell disposed on the inner wall of the left outer shell, and further comprising: a right outer shell disposed on one side of the left outer shell, the inner wall of the right outer shell being fixedly connected to the right inner shell; a heat dissipation mechanism disposed inside the left outer shell, the left inner shell, the right outer shell, and the right inner shell, the heat dissipation mechanism comprising an annular channel, a tangential air inlet, a vent hole, and an exhaust outlet; an exhaust mechanism disposed at the top of the left outer shell, the exhaust mechanism comprising a baffle and a small spring; and an insertion interface disposed on the inner wall of the left inner shell and the right inner shell, the insertion interface comprising an arc-extinguishing mechanism inserted into the inside, the arc-extinguishing mechanism comprising a front row of arc-extinguishing grid plates and a rear row of arc-extinguishing grid plates.

[0007] As a preferred technical solution of this utility model, the annular channel is disposed inside the left outer shell, the left inner shell, the right outer shell and the right inner shell. A tangential air inlet is provided through the bottom of one side of the left outer shell and the right outer shell. A number of vent holes are provided through the surface of the left inner shell and the right inner shell. A number of exhaust ports are provided through the top of the left outer shell and the right outer shell.

[0008] As a preferred technical solution of this utility model, multiple sets of baffles are disposed at the top of the left outer shell, and small springs are fixedly connected to one side of the bottom of each set of baffles.

[0009] As a preferred technical solution of this utility model, multiple sets of the front row arc extinguishing grid plates are inserted into the inside of the insertion interface, and multiple sets of rear row arc extinguishing grid plates are provided on one side of the multiple sets of the front row arc extinguishing grid plates.

[0010] As a preferred embodiment of this utility model, multiple sets of baffles are disposed above the exhaust port, and multiple sets of baffles are rotatably connected to the left outer casing on the side of the exhaust port.

[0011] As a preferred embodiment of this utility model, a support block is fixedly connected to one side of the exhaust port, and the small spring is fixedly connected above the exhaust support block.

[0012] As a preferred embodiment of this utility model, the multiple sets of front-row arc-extinguishing grid plates and the multiple sets of rear-row arc-extinguishing grid plates are arranged in parallel, and the multiple sets of front-row arc-extinguishing grid plates and the multiple sets of rear-row arc-extinguishing grid plates are intersected and arranged inside the left inner shell and the right inner shell.

[0013] As a preferred embodiment of this utility model, a groove is provided on one side of both the right outer shell and the right inner shell, and a plug-in block is fixedly connected to one side of both the left outer shell and the left inner shell. The size of the groove is adapted to the size of the plug-in block, and the left outer shell is threaded to one side of the right outer shell.

[0014] Compared with the prior art, this utility model provides an arc-extinguishing shroud with good stability, and has the following beneficial effects:

[0015] 1. This high-stability arc extinguishing hood, through the heat dissipation mechanism located inside the left outer shell, left inner shell, right outer shell, and right inner shell, and the exhaust mechanism located at the top of the left outer shell, allows high-temperature, high-pressure gas to penetrate the vents on the surfaces of the left and right inner shells and enter the double-walled annular channel when the contacts separate and generate an electric arc. The gas mixes with the airflow introduced by the tangential air inlet within the annular channel to form a high-speed cyclone, fully contacting the metal wall surface for efficient heat dissipation. Simultaneously, the interlayer space absorbs the arc pressure impact and significantly reduces the outer wall temperature. The high-pressure gas accumulated in the annular channel rises to the exhaust port at the top of the left and right outer shells, overcoming the tension of the small spring to open the baffle, directionally discharging the hot gas and metal particles. After the arc is extinguished and the pressure drops, the small spring pulls the baffle to tightly close the exhaust port, thereby maximizing heat exchange through the cyclone airflow, rapidly cooling the arc gas, preventing component overheating and failure. This effectively avoids the defects of traditional arc extinguishing hoods, such as insufficient heat dissipation leading to overheating aging and pressure runaway, significantly improving arc extinguishing reliability, structural lifespan, and operational safety.

[0016] 2. This high-stability arc-extinguishing shroud, through the arc-extinguishing mechanism set inside the connector, when the contacts separate and an arc is generated, the arc is introduced into the arc-extinguishing mechanism composed of front and rear arc-extinguishing grids. The arc is first divided into multiple short arc segments by the cross-arranged front arc-extinguishing grids, and its energy is absorbed and dissipated by the grids. The residual arc is further divided and cooled by the rear arc-extinguishing grids. The metal surface of the grids quickly absorbs heat and causes the arc voltage to rise. Through the division, elongation and cooling of the arc by the multi-stage grids, the arc resistance increases sharply, and finally, due to insufficient energy, it is forcibly extinguished. Thus, through the cross-arrangement of the front and rear grids, the number of arc divisions is maximized, the arc path length and cooling area are significantly increased, the metal grids quickly absorb the arc heat, reduce the arc temperature, accelerate the deionization process, directly improve the arc extinguishing speed and reliability, and ensure the safe interruption of large currents by the switching equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the heat dissipation mechanism of this utility model;

[0019] Figure 3 This is a schematic diagram of the exhaust mechanism of this utility model;

[0020] Figure 4 This is a schematic diagram of the arc-extinguishing mechanism of this utility model.

[0021] In the diagram: 1. Left outer shell; 2. Left inner shell; 3. Right outer shell; 4. Right inner shell; 5. Heat dissipation mechanism; 501. Annular channel; 502. Tangential air inlet; 503. Vent hole; 504. Exhaust port; 6. Exhaust mechanism; 601. Baffle; 602. Small spring; 7. Plug-in interface; 8. Arc extinguishing mechanism; 801. Front row of arc extinguishing grids; 802. Rear row of arc extinguishing grids; 9. Support block; 10. Plug-in block. Detailed Implementation

[0022] 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.

[0023] Please see Figures 1-4 This utility model discloses an arc-extinguishing cover with good stability, including a left outer shell 1 and a left inner shell 2 disposed on the inner side wall of the left outer shell 1, and further including: a right outer shell 3 disposed on one side of the left outer shell 1, and a right inner shell 4 fixedly connected to the inner side wall of the right outer shell 3; a heat dissipation mechanism 5 disposed inside the left outer shell 1, the left inner shell 2, the right outer shell 3 and the right inner shell 4, the heat dissipation mechanism 5 including an annular channel 501, a tangential air inlet 502, a vent 503 and an exhaust port 504; an exhaust mechanism 6 disposed at the top of the left outer shell 1, the exhaust mechanism 6 including a baffle 601 and a small spring 602; and an insertion interface 7 disposed on the inner side wall of the left inner shell 2 and the right inner shell 4, the insertion interface 7 being into which an arc-extinguishing mechanism 8 is inserted, the arc-extinguishing mechanism 8 including a front row of arc-extinguishing grid plates 801 and a rear row of arc-extinguishing grid plates 802.

[0024] Specifically, the annular channel 501 is located inside the left outer shell 1, the left inner shell 2, the right outer shell 3, and the right inner shell 4. A tangential air inlet 502 is provided through the bottom of one side of the left outer shell 1 and the right outer shell 3. Several sets of vent holes 503 are provided through the surface of the left inner shell 2 and the right inner shell 4. Several sets of exhaust ports 504 are provided through the top of the left outer shell 1 and the right outer shell 3.

[0025] In this embodiment, when the contacts separate and generate an electric arc, the high-temperature and high-pressure gas penetrates the vent holes 503 on the surfaces of the left inner shell 2 and the right inner shell 4 and enters the double-walled annular channel 501. The gas mixes with the airflow introduced by the tangential air inlet 502 in the annular channel 501 to form a high-speed cyclone, which fully contacts the metal wall surface to achieve efficient heat dissipation. At the same time, the interlayer space absorbs the pressure impact of the electric arc and significantly reduces the temperature of the outer wall. Finally, the gas is discharged through the exhaust port 504, completing the arc extinguishing process.

[0026] Multiple sets of baffles 601 are disposed at the top of the left outer shell 1, and small springs 602 are fixedly connected to one side of the bottom of each set of baffles 601.

[0027] In this embodiment, when the contacts separate and generate an electric arc, the high-pressure gas accumulated in the interlayer annular channel 501 rises to the exhaust port 504 at the top of the left outer shell 1 and the right outer shell 3, overcomes the pulling force of the small spring 602 and breaks through the baffle 601, directionally discharging the hot gas and metal particles. After the electric arc is extinguished and the pressure drops, the small spring 602 pulls the baffle 601 to tightly close the exhaust port 504.

[0028] Specifically, multiple sets of front-row arc-extinguishing grid plates 801 are inserted into the inside of the insertion interface 7, and multiple sets of rear-row arc-extinguishing grid plates 802 are provided on one side of the multiple sets of front-row arc-extinguishing grid plates 801.

[0029] In this embodiment, when the contacts separate and generate an electric arc, the arc is introduced into the arc extinguishing mechanism 8, which consists of a front row of arc extinguishing grids 801 and a rear row of arc extinguishing grids 802. The arc is first divided into multiple short arc segments by the cross-arranged front row of arc extinguishing grids 801, and its energy is absorbed and dissipated by the grids. The residual arc is further divided and cooled by the rear row of arc extinguishing grids 802. The metal surface of the grids quickly absorbs heat and causes the arc voltage to rise. Through the division, elongation and cooling effect of the arc by the multi-stage grids, the arc resistance increases sharply and is eventually forced to extinguish due to insufficient energy.

[0030] Specifically, multiple baffles 601 are all located above the exhaust port 504, and multiple baffles 601 are rotatably connected to the left outer shell 1 located on one side of the exhaust port 504. A support block 9 is fixedly connected to one side of the exhaust port 504, and a small spring 602 is fixedly connected above the exhaust support block 9.

[0031] In this embodiment, when the high-pressure gas in the interlayer rises to the exhaust port 504, the gas pressure pushes the bottom of the baffle 601 vertically upward, overcoming the tension of the small spring 602, causing the baffle 601 to rotate outward around the axis and open, forming a directional exhaust channel. After the arc is extinguished, the pressure drops, and the small spring 602 pulls the baffle 601 to swing inward, tightly covering the exhaust port 504 to form a physical seal, blocking the backflow of external air. In the closed state, the exhaust port 504 is completely covered, preventing dust and moisture from entering the arc-extinguishing chamber. The rotating shaft connection method ensures that the baffle 601 rotates only along a single degree of freedom, avoiding jamming or offset, and ensuring accurate and reliable opening and closing actions.

[0032] Specifically, multiple sets of front-row arc-extinguishing grid plates 801 and multiple sets of rear-row arc-extinguishing grid plates 802 are arranged in parallel, and the multiple sets of front-row arc-extinguishing grid plates 801 and multiple sets of rear-row arc-extinguishing grid plates 802 are intersected inside the left inner shell 2 and the right inner shell 4.

[0033] In this embodiment, after the electric arc is initially cut by the front row of arc-extinguishing grid plates 801, the rear row of arc-extinguishing grid plates 802 precisely blocks the gaps in the front row, forcing the electric arc to strike the rear row of arc-extinguishing grid plates 802 a second time, further dividing it into shorter and more segmented arc strings, accelerating energy dissipation. The cross structure significantly increases the contact area and path length between the grid plates and the electric arc, and the metal sheet efficiently absorbs the heat of the electric arc and conducts it through the shell, inhibiting heat accumulation.

[0034] Specifically, a groove is provided on one side of both the right outer shell 3 and the right inner shell 4, and a plug-in block 10 is fixedly connected to one side of both the left outer shell 1 and the left inner shell 2. The size of the groove is adapted to the size of the plug-in block 10, and the left outer shell 1 is threaded to one side of the right outer shell 3.

[0035] In this embodiment, the precise fit between the plug block 10 and the groove enables the rapid positioning and alignment of the left inner shell 2 and the right inner shell 4, and the left outer shell 1 and the right outer shell 3, ensuring that the arc-extinguishing grid plates arranged inside are precisely misaligned. At the same time, the threaded connection between the left outer shell 1 and the right outer shell 3 provides rigid constraints, forming a dual locking mechanism.

[0036] The working principle and usage process of this utility model are as follows: When the contacts separate and generate an electric arc, the high-temperature and high-pressure gas penetrates the vent holes 503 on the surfaces of the left inner shell 2 and the right inner shell 4 and enters the double-walled annular channel 501. The gas mixes with the airflow introduced by the tangential air inlet 502 in the annular channel 501 to form a high-speed cyclone, which fully contacts the metal wall surface to achieve efficient heat dissipation. At the same time, the interlayer space absorbs the pressure impact of the electric arc and significantly reduces the temperature of the outer wall. The high-pressure gas accumulated in the annular channel 501 rises to the exhaust port 504 at the top of the left outer shell 1 and the right outer shell 3, overcomes the pulling force of the small spring 602 and breaks through the baffle 601, directionally discharging the hot gas and metal particles. After the electric arc is extinguished and the pressure drops, the small spring 602 pulls the baffle 601 to tightly close the exhaust port 504.

[0037] When the contacts separate and generate an electric arc, the arc is introduced into the arc extinguishing mechanism 8, which consists of a front row of arc extinguishing grids 801 and a rear row of arc extinguishing grids 802. The arc is first divided into multiple short arc segments by the cross-arranged front row of arc extinguishing grids 801, and its energy is absorbed and dissipated by the grids. The residual arc is further divided and cooled by the rear row of arc extinguishing grids 802. The metal surface of the grids quickly absorbs heat and causes the arc voltage to rise. Through the division, elongation and cooling of the arc by the multi-stage grids, the arc resistance increases sharply and is eventually forced to extinguish due to insufficient energy.

[0038] In summary, this high-stability arc extinguishing shroud effectively avoids problems such as component overheating and aging, and pressure runaway and bursting caused by insufficient heat dissipation, through the heat dissipation mechanism 5 set inside the left outer shell 1, left inner shell 2, right outer shell 3 and right inner shell 4, and the arc extinguishing mechanism 8 set inside the plug interface 7. At the same time, the cross grid design overcomes the defects of insufficient arc segmentation and limited cooling area of ​​single-row grids, ensuring stability during high current interruption and long service life of the equipment.

[0039] It should be noted that, in this document, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An arc-extinguishing shield with good stability, comprising a left outer shell (1) and a left inner shell (2) disposed on the inner sidewall of the left outer shell (1), characterized in that, Also includes: A right outer shell (3) is provided on one side of the left outer shell (1). The inner wall of the right outer shell (3) is fixedly connected to a right inner shell (4). A heat dissipation mechanism (5) is provided inside the left outer shell (1), the left inner shell (2), the right outer shell (3) and the right inner shell (4). The heat dissipation mechanism (5) includes an annular channel (501), a tangential air inlet (502), a vent (503) and an exhaust port (504). An exhaust mechanism (6) is provided at the top of the left outer casing (1), the exhaust mechanism (6) including a baffle (601) and a small spring (602). An insertion interface (7) is provided on the inner sidewall of the left inner shell (2) and the right inner shell (4). An arc extinguishing mechanism (8) is inserted into the insertion interface (7). The arc extinguishing mechanism (8) includes a front row of arc extinguishing grid plates (801) and a rear row of arc extinguishing grid plates (802).

2. The arc-extinguishing shroud with good stability according to claim 1, characterized in that: The annular channel (501) is located inside the left outer shell (1), the left inner shell (2), the right outer shell (3) and the right inner shell (4). A tangential air inlet (502) is provided through the bottom of one side of the left outer shell (1) and the right outer shell (3). Several sets of vent holes (503) are provided through the surface of the left inner shell (2) and the right inner shell (4). Several sets of exhaust ports (504) are provided through the top of the left outer shell (1) and the right outer shell (3).

3. The arc-extinguishing shroud with good stability according to claim 1, characterized in that: Multiple sets of baffles (601) are disposed at the top of the left outer shell (1), and small springs (602) are fixedly connected to one side of the bottom end of each set of baffles (601).

4. The arc-extinguishing shroud with good stability according to claim 1, characterized in that: Multiple sets of the front row arc extinguishing grid plates (801) are inserted into the inside of the insertion interface (7), and multiple sets of rear row arc extinguishing grid plates (802) are provided on one side of the multiple sets of the front row arc extinguishing grid plates (801).

5. The arc-extinguishing shroud with good stability according to claim 1, characterized in that: Multiple sets of baffles (601) are disposed above the exhaust port (504), and multiple sets of baffles (601) are rotatably connected to the left outer shell (1) on one side of the exhaust port (504).

6. The arc-extinguishing shroud with good stability according to claim 1, characterized in that: A support block (9) is fixedly connected to one side of the exhaust port (504), and the small spring (602) is fixedly connected above the exhaust support block (9).

7. The arc-extinguishing shroud with good stability according to claim 1, characterized in that: The multiple sets of front-row arc-extinguishing grid plates (801) and the multiple sets of rear-row arc-extinguishing grid plates (802) are arranged in parallel, and the multiple sets of front-row arc-extinguishing grid plates (801) and the multiple sets of rear-row arc-extinguishing grid plates (802) are intersected and arranged inside the left inner shell (2) and the right inner shell (4).

8. The arc-extinguishing shroud with good stability according to claim 6, characterized in that: The right outer shell (3) and the right inner shell (4) are provided with grooves on one side, and the left outer shell (1) and the left inner shell (2) are fixedly connected with plug blocks (10) on one side. The size of the groove is adapted to the size of the plug blocks (10), and the left outer shell (1) is threaded to one side of the right outer shell (3).

Images