Switching arc extinction unit

Abstract

The application relates to the technical field of arc extinguishing units and discloses a switch arc extinguishing unit which comprises an insulating base and an insulating sleeve, a first cavity is arranged in the insulating sleeve, at least two first columns are arranged on the outer surface of the insulating base and can move along the central axis direction of the insulating sleeve, at least two second columns are arranged in the first cavity and can move along the central axis direction of the insulating sleeve, and a plurality of scraping pieces are arranged in the first cavity and the outer surfaces of the scraping pieces abut against the end faces of the second columns and the first columns; the scraping pieces can rotate, the end faces of the second columns and the first columns are scraped before the two columns contact, the traces and dirt caused by the arcing of the second columns and the first columns are scraped clean, the electrical connection stability of the second columns and the first columns is ensured, the heat generation is reduced, and the switch is prevented from being damaged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of arc extinguishing units, in particular to a switch arc extinguishing unit. BACKGROUND

[0002] The load switch arc extinguishing structure is mainly used to extinguish the arc generated when the switch breaks the circuit. Its working principle is to use various physical or chemical methods to quickly extinguish the arc, thereby protecting the switch device and ensuring the safety of the circuit. Common arc extinguishing structures include gas compression type, in which the moving contact moves to compress the gas when the switch breaks, causing the gas to be blown out at high speed to extinguish the arc. There is also a gas generating type, which uses the high temperature of the arc to decompose the solid gas generating material in the arc extinguishing chamber to generate gas, which is used to extinguish the arc. The magnetic blow type arc extinguishing structure relies on the magnetic field force acting on the arc to lengthen and cool the arc, and eventually extinguish it. These arc extinguishing structures can effectively improve the performance of the load switch and prolong its service life, and play a key role in the field of power systems.

[0003] At the moment of contact between the two conductive ends of the environmentally friendly gas-filled cabinet load switch, an arc will be generated, so the switch needs to have arc extinguishing function. After the arc extinguishing process is completed, metal vapor will be generated. These metal vapor may adhere to the surface of the conductive end, affecting the electrical connection of the conductive end. At the same time, the generated arc will burn the contact surface of the conductive end, thereby forming a burn mark and leaving dirt. The metal surface after burning is no longer smooth, and oxides or other undesirable materials may form on the surface, which will increase the resistance of the contact. The increase in resistance will cause more heat to be generated, further exacerbating the burning phenomenon, forming a vicious cycle, and ultimately damaging the switch. SUMMARY

[0004] The purpose of the present application is to solve the problems existing in the prior art and provide a switch arc extinguishing unit.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0006] The switch arc extinguishing unit comprises an insulating base and an insulating sleeve, a first cavity is formed in the inside of the insulating sleeve, and the switch arc extinguishing unit further comprises:

[0007] At least two first columns are arranged on the outer surface of the insulating base, and the first columns can move along the central axis direction of the insulating sleeve;

[0008] At least two second columns are arranged in the inside of the first cavity and can move along the central axis direction of the insulating sleeve;

[0009] A plurality of wipers are arranged in the inside of the first cavity, the outer surface of the plurality of wipers abuts against the end surface of the second column and the first column, and the plurality of wipers are arranged to be able to rotate around the central axis of the insulating sleeve.

[0010] As a further scheme of the present application, the top end of the first column is provided with a first inclined surface, the bottom end of the second column is provided with a second inclined surface matched with the first inclined surface, and an included angle is formed between the plurality of scrapers and the central axis of the insulating sleeve, and the included angle is matched with the first inclined surface.

[0011] As a further scheme of the present application, the inside of the second column is provided with a through hole, a rod body is slidingly inserted into the inner wall of the through hole, and the bottom end of the rod body penetrates the bottom end of the second column and is fixedly connected with the plurality of scrapers.

[0012] As a further scheme of the present application, the top end of the rod body is fixedly installed with a guide column penetrating the top end of the second column, the inner wall of the first cavity is provided with a spiral groove, the guide column is slidingly installed with the inner wall of the spiral groove, the top end of the second column is fixedly installed with a connecting column, and the outer surface of the connecting column close to the bottom end is provided with a notch.

[0013] As a further scheme of the present application, the top end of the rod body is fixedly connected with a spring, the top end of the spring abuts against the top wall of the notch and can slide relative to the notch, the top end of the second column is fixedly installed with a sheet body, the sheet body is arranged at the position of the notch, the outer surface of the sheet body is provided with a horizontal groove and a vertical groove, the horizontal groove and the vertical groove are communicated, the guide column abuts against the inner wall of the horizontal groove and the vertical groove, the outer surface of the rod body close to the top end is fixedly installed with a stop ring, and the lower surface of the stop ring is flush with the end surface of the second column.

[0014] As a further scheme of the present application, the top end of the connecting column is fixedly installed with a copper bar penetrating the top end of the insulating sleeve, the outer surface of the connecting column is sleeved with a tension spring, one end of the tension spring is fixedly connected with the lower surface of the copper bar, and the other end of the tension spring is fixedly connected with the end surface of the top end of the insulating sleeve.

[0015] As a further scheme of the present application, the inside of the rod body is provided with an air channel, the top end of the air channel penetrating the rod body is communicated with the first cavity, and the circumferential outer surface of the rod body close to the bottom end is provided with a plurality of exhaust holes, and the exhaust holes are communicated with the through groove.

[0016] As a further scheme of the present application, the copper bar is electrically connected with the second column through the connecting column, the second column is electrically connected with the first column, and the insulating sleeve is connected through an insulating connecting block.

[0017] As a further scheme of the present application, the second column is provided with a plurality of through grooves close to one end of the first column, and the scrapers are slidingly installed with the inner wall of the through grooves.

[0018] As a further scheme of the present application, the first column, the second column and the insulating sleeve are arranged at the same center.

[0019] The application sets the wiper which can rotate, and the end face of the second column and the first column is scraped before the two columns contact, so that the second column and the first column are scraped clean because of the trace dirt generated by the arc, which ensures the stability of the electrical connection of the second column and the first column, reduces the heat generation, and prevents the switch from being damaged. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The overall structure schematic diagram of the switch arc extinguishing unit is provided for the application;

[0021] Figure 2 The rear view structure schematic diagram of the switch arc extinguishing unit is provided for the application;

[0022] Figure 3 The insulating sleeve schematic diagram of the switch arc extinguishing unit is provided for the application;

[0023] Figure 4 The second column schematic diagram of the switch arc extinguishing unit is provided for the application;

[0024] Figure 5 The insulating sleeve sectional view schematic diagram of the switch arc extinguishing unit is provided for the application;

[0025] Figure 6 The connecting column schematic diagram of the switch arc extinguishing unit is provided for the application;

[0026] Figure 7 The second column sectional view schematic diagram of the switch arc extinguishing unit is provided for the application;

[0027] Figure 8 The second column sectional view schematic diagram of the switch arc extinguishing unit is provided for the application;

[0028] Figure 9 The rod body schematic diagram of the switch arc extinguishing unit is provided for the application;

[0029] Figure 10 The rod body sectional view schematic diagram of the switch arc extinguishing unit is provided for the application;

[0030] Figure 11 The sheet body schematic diagram of the switch arc extinguishing unit is provided for the application.

[0031] In the drawings:

[0032] 100, insulating base; 200, insulating sleeve; 210, first cavity; 220, spiral groove;

[0033] 300, insulating connecting block; 400, first column; 410, first inclined surface;

[0034] 500, second post; 510, second inclined surface; 520, through slot; 530, through hole; 600, connecting post; 610, notch;

[0035] 700, copper bar; 800, tension spring; 900, rod body; 910, air channel; 920, exhaust hole; 930, blocking ring; 940, guide post; 1000, scraper; 1100, spring; 1200, sheet body; 1210, horizontal slot; 1220, vertical slot. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in conjunction with specific embodiments.

[0037] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be broadly understood, for example, "connection" can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication between the two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In order to remove the dirt marks generated by the arc burning of the contact conductive end, as shown in Figure 1 , Figure 2 and Figure 3 , the present application proposes a switch arc extinguishing unit, which comprises an insulating base 100, an insulating sleeve 200, two first posts 400, two second posts 500 and a plurality of scrapers 1000. Specifically, as shown in Figure 1 , the two first posts 400 are fixedly installed on the outer surface of the insulating base 100, as shown in Figure 3 , the two second posts 500 are fixedly installed on the outer surface of the insulating sleeve 200, and the plurality of scrapers 1000 are arranged between the two first posts 400 and the two second posts 500.As shown, two second columns 500 are arranged inside the first cavity 210, so that the first column 400 and the second column 500 can be switched from the separated state to the electrically connected state, and the two first columns 400 can move along the central axis of the insulating sleeve 200, so that the end surface of the first column 400 can abut against the end surface of the second column 500, thereby realizing electrical connection. In practice, in order to enable the first column 400 to move along the central axis of the insulating sleeve 200 towards the second column 500, the first column 400 is fixedly connected to the external telescopic rod through the insulating base 100, so that the telescopic rod is extended to move and drive the first column 400 to move towards the second column 500, thereby realizing electrical connection between the first column 400 and the second column 500.

[0040] In order to enable the first column 400 to move towards the second column 500, the first column 400, the second column 500 and the insulating sleeve 200 are arranged at the same center, and the two insulating sleeves 200 are fixedly connected together through the insulating connecting block 300.

[0041] In order to clean the contact surfaces of the first column 400 and the second column 500, as shown, Figure 3 a plurality of wipers 1000 are arranged inside the first cavity 210, and the outer surfaces of the plurality of wipers 1000 abut against the end surfaces of the second column 500 and the first column 400. Since the plurality of wipers 1000 are arranged to rotate around the central axis of the insulating sleeve 200, the wipers 1000 can rotate relative to the first column 400 and the second column 500, thereby scraping off dirt on the contact surfaces of the second column 500 and the first column 400. It should be noted that when the wipers 1000 are selected, ceramic materials with good wear resistance and insulation are used, and the contact positions of the wipers 1000, the first column 400 and the second column 500 are provided with sharp-edged chamfers, so that the wipers 1000 can easily scrape off dirt on the surfaces of the first column 400 and the second column 500. The device is provided with wipers 1000 that can rotate, and the end surfaces of the second column 500 and the first column 400 are scraped before contact, so that the second column 500 and the first column 400 are scraped clean of traces of dirt caused by arcing, thereby ensuring the stability of the electrical connection between the second column 500 and the first column 400, reducing the generation of heat, and preventing the switch from being damaged.

[0042] In actual use, in order to make the area of the end surfaces of the second column 500 and the first column 400 in contact large enough to reduce uneven current flow and reduce arcing, as shown, Figure 2 and Figure 8As shown, the top end of the first column 400 is provided with a first inclined surface 410, and the bottom end of the second column 500 is provided with a second inclined surface 510 matched with the second inclined surface 510. Through the arrangement of the first inclined surface 410 and the second inclined surface 510, the contact surface of the second column 500 and the first column 400 is increased, so that the uneven flow of current and the occurrence of arcing can be reduced. At the same time, in order to enable the wiper 1000 to adapt to the first inclined surface 410 and the second inclined surface 510, the first inclined surface 410 and the second inclined surface 510 are matched with the angle between the plurality of wipers 1000 and the central axis of the insulating sleeve 200. Figure 9 As shown, the plurality of wipers 1000 and the central axis of the insulating sleeve 200 are provided with an included angle, and the included angle is matched with the first inclined surface 410.

[0043] In order to enable the wiper 1000 to rotate around the central axis of the insulating sleeve 200, the second column 500 is provided with a through hole 530. Figure 8 As shown, the inner wall of the through hole 530 is slidably provided with a rod body 900, and the bottom end of the rod body 900 penetrates the bottom end of the second column 500 and is fixedly connected with the plurality of wipers 1000. By rotating the rod body 900, the plurality of wipers 1000 are driven to rotate, and the surfaces of the first inclined surface 410 and the second inclined surface 510 are scraped. Figure 7

[0044] Specifically, in order to enable the rod body 900 to rotate, the top end of the rod body 900 penetrates the top end of the second column 500 and is fixedly installed with a guide column 940. Figure 6 As shown, the inner wall of the first cavity 210 is provided with a spiral groove 220. Figure 5 As shown, the guide column 940 and the inner wall of the spiral groove 220 are slidably installed. When the rod body 900 moves away from the insulating base 100 along the central axis of the insulating sleeve 200, the rod body 900 is rotated by the cooperation of the guide column 940 and the spiral groove 220, thereby driving the plurality of wipers 1000 to rotate. Figure 4 In order to enable the rod body 900 to move away from the insulating base 100 along the central axis of the insulating sleeve 200, the second column 500 is arranged to be movable along the central axis of the insulating sleeve 200. Specifically, when the first column 400 is inserted into the inside of the insulating sleeve 200 by the extension rod, the first column 400 moves towards the second column 500, thereby contacting the wiper 1000. When the first column 400 continues to move towards the second column 500, the second column 500 and the plurality of wipers 1000 move away from the insulating base 100. At this time, the guide column 940 slides relative to the spiral groove 220, thereby rotating the rod body 900.

[0045]

[0046] ​​In order to enable the first inclined surface 410 and the second inclined surface 510 to abut against each other, and at the same time, the first inclined surface 410 is always abutted against when the blade 1000 scrapes trace dirt, as shown in Figure 7 As shown in the figure, the top end of the second column 500 is fixedly installed with a connecting column 600, the top end of the connecting column 600 penetrates the top end of the insulating sleeve 200 and is fixedly installed with a copper bar 700, the outer surface of the connecting column 600 is sleeved with a tension spring 800, one end of the tension spring 800 is fixedly connected with the lower surface of the copper bar 700, and the other end of the tension spring 800 is fixedly connected with the end face of the top end of the insulating sleeve 200. Through the elastic force of the tension spring 800, the blade 1000 can abut against the first inclined surface 410, and at the same time, the copper bar 700 is electrically connected with the external cable.

[0047] In order to enable the blade 1000 to abut against the first column 400 and then move the second column 500 through the rod body 900, as shown in Figure 7 As shown in the figure, the outer surface of the connecting column 600 close to the bottom end is provided with a notch 610, and the top end of the second column 500 is fixedly installed with a sheet body 1200. Since the sheet body 1200 is arranged at the position of the notch 610, as shown in Figure 11 As shown in the figure, the outer surface of the sheet body 1200 is provided with a horizontal groove 1210 and a vertical groove 1220, the horizontal groove 1210 and the vertical groove 1220 are communicated, the guide column 940 abuts against the inner walls of the horizontal groove 1210 and the vertical groove 1220, and since the outer surface of the rod body 900 close to the top end is fixedly installed with a stop ring 930, the lower surface of the stop ring 930 is flush with the end face of the second column 500. When the guide column 940 is at the position of the horizontal groove 1210, the axial position of the guide column 940 is limited, so the guide column 940 can only rotate.

[0048] In order to enable the lower surface of the stop ring 930 to be flush with the end face of the second column 500, as shown in Figure 7 As shown in the figure, the top end of the rod body 900 is fixedly connected with a spring 1100, the top end of the spring 1100 abuts against and can slide relative to the top wall of the notch 610. Through the elastic force of the spring 1100, the lower surface of the stop ring 930 is flush with the end face of the second column 500.

[0049] As the rod 900 continues to rotate until the guide post 940 abuts against the inner wall of the vertical groove 1220, the tension spring 800 prevents the second post 500 from rotating relative to the insulating sleeve 200 under a small force. At this point, the guide post 940 continues to slide along the spiral groove 220, and then slides relative to the second post 500 along the central axis of the second post 500 into the top of the vertical groove 1220 and abuts against its top. This is because the second post 500 is close to the first post 40. One end of the column 0 has multiple through slots 520. The scraper 1000 is slidably installed on the inner wall of the through slot 520. Therefore, the rod 900 drives multiple scrapers 1000 into the interior of the through slot 520. At this time, the first inclined surface 410 and the second inclined surface 510 are in complete contact and flat, thereby realizing the electrical connection between the first column 400 and the second column 500. Before the first inclined surface 410 and the second inclined surface 510 come into contact, the surface is scraped clean, ensuring the stability of the electrical connection. When the guide post 940 slides into the top of the vertical groove 1220, the rod 900 does not rotate or move axially relative to the second post 500. At this point, as the first post 400 continues to push, the guide post 940 will cause the second post 500 to rotate slightly relative to the first post 400, thus causing the first inclined surface 410 and the second inclined surface 510 to slide slightly relative to each other. Through this sliding movement, small particles of dirt remaining between the first inclined surface 410 and the second inclined surface 510 can be carried out, and the carried-out dirt will slide into the through groove 52. The internal storage of 0 further ensures the tightness of the contact between the first inclined surface 410 and the second inclined surface 510, making the electrical connection more stable. It should be noted that the slight rotation of the second column 500 will not affect the function of the tension spring 800. At the same time, the tension spring 800 can drive the second column 500 to reset after the first column 400 leaves, and the spring 1100 drives the guide column 940 to leave the top of the vertical groove 1220 and then return to the horizontal groove 1210 along the spiral groove 220.

[0050] To remove the dirt and grime scraped off by the 1000 scraper, such as Figure 10 As shown, the rod body 900 has an air passage 910 inside, and the air passage 910 passes through the top of the rod body 900 and is connected to the first cavity 210. The outer circumferential surface of the rod body 900 near the bottom end has multiple exhaust holes 920, which are connected to the through groove 520. By moving the second column 500 upward, the air inside the first cavity 210 can be squeezed, so that the air passes through the air passage 910 and is discharged from the exhaust holes 920, blowing away the traces and dirt scraped off by the scraper 1000. It should be noted that in order to allow the gas to flow normally, the outer surface of the first column 400 has many small grooves, so that there is a gap between it and the inner wall of the first cavity 210.

[0051] The copper bar 700 is electrically connected with the second column 500 through the connecting column 600, and the second column 500 is electrically connected with the first column 400 by abutting, so that the first column 400 is electrically connected with the copper bar 700, and the other end of the first column 400 is electrically connected with the electrical element.

[0052] It should be noted that the control mode of the electrical element in the scheme is controlled by the peripheral controller matched with the electrical element, and the control circuit can be realized by simple programming of the person skilled in the art, which belongs to the common knowledge in the art, and only the use is described, and no improvement is made, and the present application is mainly used to protect the mechanical device, so the control mode and the circuit connection of the present application will not be explained in detail.

[0053] The basic principles and main features of the present application and the advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited to the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application.

Claims

1. A switch arc-extinguishing unit comprising an insulating base (100) and an insulating sleeve (200), an interior of the insulating sleeve (200) being provided with a first cavity (210), characterized in that, The switch arc extinguishing unit further comprises: at least two first columns (400) arranged on the outer surface of the insulating base (100), which can move along the central axis direction of the insulating sleeve (200); at least two second columns (500) arranged inside the first cavity (210) and capable of moving along the central axis direction of the insulating sleeve (200); a plurality of wipers (1000) arranged inside the first cavity (210), the outer surface of the plurality of wipers (1000) abutting against the end surface of the second column (500) and the first column (400), and the plurality of wipers (1000) being arranged to be capable of rotating with the central axis of the insulating sleeve (200) as the rotation center; the top end of the first column (400) is provided with a first inclined surface (410), the bottom end of the second column (500) is provided with a second inclined surface (510) matched with the second inclined surface (510), an included angle is provided between the plurality of wipers (1000) and the central axis of the insulating sleeve (200), the included angle is matched with the first inclined surface (410), a through hole (530) is provided in the inside of the second column (500), a rod body (900) is slidingly inserted into the inner wall of the through hole (530), the bottom end of the rod body (900) penetrates through the bottom end of the second column (500) and is fixedly connected with the plurality of wipers (1000), the top end of the rod body (900) penetrates through the top end of the second column (500) and is fixedly installed with a guide column (940), a spiral groove (220) is provided in the inner wall of the first cavity (210), the guide column (940) is slidingly installed with the inner wall of the spiral groove (220), and the top end of the second column (500) is fixedly installed with a connecting column (600), the outer surface of the connecting column (600) close to the bottom end is provided with a notch (610).

2. The switch arc extinguishing unit according to claim 1, characterized in that the top end of the rod body (900) is fixedly connected with a spring (1100), the top end of the spring (1100) abuts against the top wall of the notch (610) and can slide relative to the top wall, the top end of the second column (500) is fixedly installed with a sheet body (1200), the sheet body (1200) is arranged at the position of the notch (610), the outer surface of the sheet body (1200) is provided with a horizontal groove (1210) and a vertical groove (1220), the horizontal groove (1210) and the vertical groove (1220) are communicated, the guide column (940) abuts against the inner walls of the horizontal groove (1210) and the vertical groove (1220), the outer surface of the rod body (900) close to the top end is fixedly installed with a stop ring (930), and the lower surface of the stop ring (930) is flush with the end surface of the second column (500).

3. The switch arc extinguishing unit according to claim 2, characterized in that the top end of the connecting column (600) penetrates through the top end of the insulating sleeve (200) and is fixedly installed with a copper bar (700), the outer surface of the connecting column (600) is sleeved with a tension spring (800), one end of the tension spring (800) is fixedly connected with the lower surface of the copper bar (700), and the other end of the tension spring (800) is fixedly connected with the end surface of the top end of the insulating sleeve (200).

4. The switch arc extinguishing unit according to claim 3, characterized in that The rod body (900) is internally provided with an air passage (910), the top end of the air passage (910) penetrating through the rod body (900) is communicated with the first cavity (210), and the circumferential outer surface of the rod body (900) close to the bottom end is provided with a plurality of exhaust holes (920), and the exhaust holes (920) are communicated with the through grooves (520).

5. The switch arc extinguishing unit of claim 3, wherein, The copper bar (700) is electrically connected with the second column (500) through the connecting column (600), the second column (500) is electrically connected with the first column (400) through abutting, and the insulating sleeve (200) is connected through the insulating connecting block (300).

6. The switch arc extinction unit of claim 1, wherein, The second column (500) is provided with a plurality of through grooves (520) at one end close to the first column (400), and the scraping piece (1000) is slidingly installed with the inner wall of the through groove (520).

7. The switch arc extinguishing unit of claim 1, wherein, The first column (400), the second column (500) and the insulating sleeve (200) are arranged at the same center.

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