Intelligent air switch with explosion-proof function
Through the design of nested structure and telescopic columns, combined with arc extinguishing gates and vents, the explosion problem during air switch trips is solved, long-term stability of functions and convenient replacement of parts are achieved, and the reliability and use of smart air switches is improved. life.
Patent Information
- Application Number
- CN202420784280.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-16
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-04-16
AI Technical Summary
Existing air switches are prone to explosive gas when tripping, resulting in damage to internal parts, and their functions are reduced after long-term use. The explosion-proof structure cannot be maintained for a long time, making internal parts inconvenient to replace and repair, which seriously restricts the development of intelligent switches.
The inner shell and outer shell design adopt a nested structure, and the air pressure balance and cooling are achieved using telescopic columns and vents. The arc extinguishing gate and coil structure are combined to prevent arc generation and gas expansion, and the shell is quickly removed to facilitate parts replacement.
Effectively prevent the generation of explosive gas, maintain long-term functional stability, facilitate parts replacement and maintenance, extend equipment life, and improve the reliability and service life of smart air switches.
Smart Images
Figure CN222260921U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of air switches, in particular to an intelligent air switch with an explosion-proof function. Background Art
[0002] At present, the low-voltage equipment management of most substations in the market is partially realized manually and partially realized through fieldbus. The low-voltage intelligentization accounts for less than 10%, which seriously restricts the development of intelligent power stations. The intelligentization of air switches is a technical problem that needs to be solved urgently. When traditional air switches trip, they will produce explosive gas, which will not cause much damage to the internal parts of the air switch. However, long-term use will inevitably affect the function of the air switch. This situation is common in unmanned intelligent switches, so an explosion-proof air switch is needed.
[0003] Chinese patent CN213546221U discloses an intelligent air switch with an explosion-proof structure that is easy to install and disassemble, including a wall, a wiring terminal, an isolating switch, an air switch body and an explosion-proof door. A mounting plate is arranged in front of the wall, and the outer side of the mounting plate is internally connected with a fastening bolt, a connecting rod is arranged in front of the middle of the mounting plate, and a connecting groove is arranged on the outer side of the connecting rod, a protective box is arranged on the outer side of the connecting groove, and a movable block is connected to the inner side of the bottom of the protective box, and a push rod is passed through the inside of the movable block, a fixing plate is fixed on the top of the protective box, an isolating switch is arranged in front of the wiring terminal, and an explosion-proof door is arranged in front of the air switch body. The intelligent air switch with an explosion-proof structure that is easy to install and disassemble is convenient to install and disassemble, and is not easy to shake after installation and fixing, so that the internal circuit connection is more stable, convenient to use, and has an explosion-proof structure.
[0004] There are still several problems with the above documents: the explosion-proof structure cannot maintain its effect for a long time; the internal parts are inconvenient to replace and repair. Utility Model Content
[0005] To solve the problems of the prior art, the utility model provides an intelligent air switch with an explosion-proof function, comprising an inner shell, an outer shell and a switch valve, the inner shell comprising an interface, a coil, an arc extinguishing grid and a telescopic column, the inner shell and the outer shell are shells with a cavity and have the same shape, the size of the outer shell is slightly larger than the inner shell, the two are nested and installed, the switch valve is arranged on the side of the inner shell and passes through the outer shell, the interface is arranged at both ends of the inner cavity of the inner shell, the coil is installed in the cavity of the inner shell and connected to the interface close to the coil, one end of the arc extinguishing grid is connected to the coil, and the other end is connected to the interface on the other side, the telescopic column is arranged inside the inner shell, one end of the telescopic column is connected to the inner shell, and the other end is connected to the outer shell.
[0006] Preferably, the interface includes a wire hole and a plug hole, the wire hole passes through the inner shell and the outer shell and communicates with the interface, and the plug hole passes through the inner shell and the outer shell and is vertically connected to the wire hole.
[0007] Preferably, the coil comprises a fixing frame, a magnet and a striker, the fixing frame is installed in the cavity of the inner shell, the magnet is surrounded by the coil and connected to the fixing frame, and the striker is arranged at the bottom of the magnet.
[0008] Preferably, the arc extinguishing grid comprises an arc plate and a connecting plate, the arc plate is connected to one end of the arc extinguishing grid and the other end is connected to a side interface, and the connecting plate is installed on the side of the arc extinguishing grid.
[0009] Preferably, the telescopic column includes a gasket, a spring and a threaded hole, the gasket is installed on the top of the telescopic column, the spring is surrounded by the outside of the telescopic column, one end of the spring is connected to the inner shell, and the other end is connected to the gasket, and the threaded hole is set at the center of the gasket.
[0010] Preferably, the shell includes a positioning hole, a threaded nail and a vent, the positioning hole is arranged on the surface of the shell, and its position corresponds to the position of the telescopic column, the threaded nail passes through the positioning hole and is connected to the telescopic column, and the vent is arranged on the side of the shell.
[0011] Preferably, the switch valve includes an elastic frame, a rotating shaft and a conductive plate, the rotating shaft is installed in the cavity of the inner shell, the elastic frame rotates around the rotating shaft, one side of the elastic frame is located below the coil, and the other side is connected to the switch valve, one end of the conductive plate is connected to the coil, and the middle part of the conductive plate is connected to the elastic frame.
[0012] Preferably, the conductive plate includes a wiring and a metal plate, the wiring is connected below the conductive plate and connected to the metal plate, and the metal plate is connected to an interface away from a side of the coil.
[0013] Compared with the prior art, the utility model has the following beneficial effects:
[0014] 1. The utility model uses a telescopic column as an explosion-proof structure, which can still maintain functional operation after long-term use. Specifically, when the air switch trips, as the air pressure increases and the temperature rises, the spring is stretched to increase the internal space to slow down the rapid increase in air pressure. When the air pressure is balanced, the spring resets to allow the inner shell and the outer shell to nest again.
[0015] 2. The utility model uses a nested structure, which is convenient for quickly opening the shell to replace parts. Specifically, the nested installation of the shell and the outer shell facilitates the rapid installation and disassembly of the air switch, and the inner shell and the outer shell can be quickly separated by turning down the threaded nails.
[0016] 3. The utility model uses vents for ventilation, balancing the air pressure while preventing dust from entering. Specifically, when the telescopic column opens the outer shell, the vents connect the inner shell with the external air, so that the external gas can form convection with the internal high-temperature air pressure, achieving the effect of cooling and reducing pressure. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1It is a three-dimensional diagram of an intelligent air switch with explosion-proof function.
[0018] Figure 2 It is a three-dimensional diagram of the inner shell of an intelligent air switch with explosion-proof function.
[0019] Figure 3 It is a three-dimensional diagram of the coil in an intelligent air switch with explosion-proof function.
[0020] Figure 4 It is a three-dimensional diagram of the arc extinguishing grid in an intelligent air switch with explosion-proof function.
[0021] Figure 5 It is a three-dimensional diagram of a telescopic column in an intelligent air switch with explosion-proof function.
[0022] Figure 6 It is a three-dimensional diagram of the shell of an intelligent air switch with explosion-proof function.
[0023] Figure 7 It is a three-dimensional diagram of a switch valve in an intelligent air switch with explosion-proof function.
[0024] The numbers in the figure are: 1, inner shell; 2, interface; 21, wire hole 22, jack; 3, coil; 31, fixing bracket; 32, magnet; 33, striker; 4, arc extinguishing grid; 41, arc plate; 42, connecting plate; 5, telescopic column; 51, gasket; 52, spring; 53, threaded hole 6, outer shell; 61, positioning hole; 62, threaded nail; 63, vent; 7, switch valve; 71, elastic frame; 72, rotating shaft; 73, conductive plate; 731, wiring; 732, metal plate. DETAILED DESCRIPTION
[0025] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0026] See also Figure 1 to Figure 7 As shown, an intelligent air switch with explosion-proof function includes an inner shell 1, an outer shell 6 and a switch valve 7. The inner shell 1 includes an interface 2, a coil 3, an arc extinguishing grid 4 and a telescopic column 5. The inner shell 1 and the outer shell 6 are shells with cavities and have the same shape. The size of the outer shell 6 is slightly larger than the inner shell 1, and the two are nested and installed. The switch valve 7 is arranged on the side of the inner shell 1 and passes through the outer shell 6. The interface 2 is arranged at both ends of the inner cavity of the inner shell 1. The coil 3 is installed in the cavity of the inner shell 1 and connected to the interface 2 close to the coil 3. One end of the arc extinguishing grid 4 is connected to the coil 3, and the other end is connected to the interface 2 on the other side. The telescopic column 5 is arranged inside the inner shell 1, one end of which is connected to the inner shell 1, and the other end is connected to the outer shell 6.
[0027] The device controls the circuit connectivity in the air switch through the switch valve 7. The inner shell 1 and the outer shell 6 are nested and installed to facilitate quick installation and disassembly of the air switch. The interface 2 is used to connect to the line. The coil 3 is used to automatically control the switch valve 7 to disconnect the circuit. The telescopic column 5 is used to open the inner shell 1 and the outer shell 6 to increase the distance between the two. When the current in the circuit is too large, the coil 3 generates a magnetic field based on the electromagnetic principle to push the switch valve 7 to close. At the same time, a strong arc will be generated when the circuit is disconnected. The arc extinguishing grid 4 divides the arc and absorbs it to produce a large amount of high-temperature gas. The gas expands between the inner shell 1 and the outer shell 6. The telescopic column 5 is forced to support the distance between the inner shell 1 and the outer shell 6, thereby increasing the pressure reduction of the internal space and sucking in external air for cooling to prevent explosion.
[0028] See also Figure 1-2 As shown, the interface 2 includes a wire hole 21 and a plug hole 22 . The wire hole 21 passes through the inner shell 1 and the outer shell 6 and communicates with the interface 2 . The plug hole 22 passes through the inner shell 1 and the outer shell 6 and is vertically connected to the wire hole 21 .
[0029] The wire holes 21 at both ends are used to insert the current line so that the entire air switch is connected to the circuit, and the jacks 22 are used to rotate the mounting studs to firmly install the wires in the wire holes 21.
[0030] See also Figure 2-Figure 3 As shown, the coil 3 includes a fixing frame 31 , a magnet 32 and a striker 33 . The fixing frame 31 is installed in the cavity of the inner shell 1 . The magnet 32 is surrounded by the coil 3 and connected to the fixing frame 31 . The striker 33 is arranged at the bottom of the magnet 32 .
[0031] The fixing frame 31 is used to hold up the entire magnet 32. When the current in the coil 3 increases, the magnetic field generated by the coil 3 increases, the attraction of the magnet 32 to the striker 33 increases, and the striker 33 hits the switch valve 7 to quickly disconnect the circuit in the air switch.
[0032] See also Figure 2 to Figure 4 As shown, the arc extinguishing grid 4 includes an arc plate 41 and a connecting plate 42 . The arc plate 41 is connected to one end of the arc extinguishing grid 4 and the other end is connected to a side interface 2 . The connecting plate 42 is installed on the side of the arc extinguishing grid 4 .
[0033] The arc extinguishing grid 4 mainly relies on magnetic blowing and gas blowing to divide and extinguish the arc. The magnetic field generated by the arc current blows the plasma in the arc outward. The heat energy generated by the arc heats the gas in the arc extinguishing chamber. The temperature rises and the gas expands to blow the arc outward. The arc plate 41 is used to connect the circuit to the switch valve 7, and the connecting plate 42 is used to connect multiple arc extinguishing grids 4 in series to increase the arc extinguishing effect.
[0034] See also Figure 2 to Figure 5As shown, the telescopic column 5 includes a gasket 51, a spring 52 and a threaded hole 53. The gasket 51 is installed at the top of the telescopic column 5. The spring 52 is surrounded by the outside of the telescopic column 5, one end of which is connected to the inner shell 1, and the other end is connected to the gasket 51. The threaded hole 53 is set at the center of the gasket 51.
[0035] When the air switch operates normally, the telescopic column 5 connects the inner shell 1 and the outer shell 6 and ensures that the two are nested. When the air switch trips, as the air pressure increases and the temperature rises, there is a tendency for the inner shell 1 and the outer shell 6 to explode. The spring 52 is stretched to increase the internal space to slow down the rapid increase in air pressure. When the air pressure is balanced, the spring 52 is reset to allow the inner shell 1 and the outer shell 6 to nest again. The gasket 51 is used to reduce the point pressure between the telescopic column 5 and the outer shell 6 to avoid damage to parts.
[0036] See also Figure 1 to Figure 6 As shown, the shell 6 includes a positioning hole 61, a threaded nail 62 and a vent 63. The positioning hole 61 is set on the surface of the shell 6, and its position corresponds to the position of the telescopic column 5. The threaded nail 62 passes through the positioning hole 61 and is connected to the telescopic column 5. The vent 63 is set on the side of the shell 6.
[0037] The outer shell 6 ensures the push-pull effect of the telescopic column 5 by the cooperation of the threaded nail 62 and the threaded hole 53 on the gasket 51. The inner shell 1 can be quickly separated from the outer shell 6 by turning down the threaded nail 62. When the air switch operates normally, the vent 63 covers the inner shell 1. When the telescopic column 5 opens the outer shell 6, the vent 63 connects the inner shell 1 with the external air, so that the external gas can form convection with the internal high temperature air pressure, thereby achieving the effect of cooling and reducing pressure.
[0038] See also Figure 2 to Figure 7 As shown, the switch valve 7 includes an elastic frame 71, a rotating shaft 72 and a conductive plate 73. The rotating shaft 72 is installed in the cavity of the inner shell 1. The elastic frame 71 rotates around the rotating shaft 72. One side of the elastic frame 71 is located below the coil 3, and the other side is connected to the switch valve 7. One end of the conductive plate 73 is connected to the coil 3, and the middle part of the conductive plate 73 is connected to the elastic frame 71.
[0039] The elastic frame 71 rotates according to the rotating shaft 72 and controls the connection state between the conductive plate 73 and the arc plate 41 on the arc extinguishing grid 4. When the switch valve 7 is opened, the conductive plate 73 is connected with the arc plate 41 to enable the circuit to operate normally. When the circuit breaker trips, the elastic frame 71 is pushed by the striker 33 on the coil 3 to disconnect the connection between the conductive plate 73 and the arc plate 41, and the circuit is disconnected.
[0040] Figure 7 As shown, the conductive plate 73 includes a wiring 731 and a metal plate 732 . The wiring 731 is connected below the conductive plate 73 and connected to the metal plate 732 . The metal plate 732 is connected to the interface 2 on the side away from the coil 3 .
[0041] When the circuit load is too large, the current is diverted more, and the current at this time is not enough to increase the magnetic field of the coil 3 to control the jumping of the switch valve 7. In this case, the metal plate 732 is softened by heat and disconnected from the wiring 731. The air switch disconnects the circuit when the circuit load is too large.
[0042] The above embodiments only express one or several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the attached claims.
Claims
1. An intelligent air switch with explosion-proof function, comprising an inner shell (1), an outer shell (6) and a switch valve (7); It is characterized in that The inner shell (1) comprises an interface (2), a coil (3), an arc extinguishing grid (4) and a telescopic column (5); the inner shell (1) and the outer shell (6) are shells provided with cavities and have the same shape; the outer shell (6) is slightly larger than the inner shell (1); the two are nested and installed; the switch valve (7) is arranged on the side of the inner shell (1) and passes through the outer shell (6); the interface (2) is arranged at both ends of the inner cavity of the inner shell (1); the coil (3) is installed in the cavity of the inner shell (1) and connected to the interface (2) close to the coil (3); one end of the arc extinguishing grid (4) is connected to the coil (3) and the other end is connected to the interface (2) on the other side; the telescopic column (5) is arranged inside the inner shell (1) and one end of the telescopic column is connected to the inner shell (1) and the other end is connected to the outer shell (6).
2. The intelligent air switch with explosion-proof function according to claim 1 is characterized in that: The interface (2) comprises a wire hole (21) and a plug hole (22); the wire hole (21) passes through the inner shell (1) and the outer shell (6) and communicates with the interface (2); the plug hole (22) passes through the inner shell (1) and the outer shell (6) and is vertically connected to the wire hole (21).
3. The intelligent air switch with explosion-proof function according to claim 1 is characterized in that: The coil (3) comprises a fixing frame (31), a magnet (32) and a striker (33); the fixing frame (31) is installed in the cavity of the inner shell (1); the magnet (32) is surrounded by the coil (3) and connected to the fixing frame (31); and the striker (33) is arranged at the bottom of the magnet (32).
4. The intelligent air switch with explosion-proof function according to claim 1 is characterized in that: The arc extinguishing grid (4) comprises an arc plate (41) and a connecting plate (42); the arc plate (41) is connected to one end of the arc extinguishing grid (4) and the other end is connected to a side interface (2); the connecting plate (42) is installed on the side of the arc extinguishing grid (4).
5. The intelligent air switch with explosion-proof function according to claim 1 is characterized in that: The telescopic column (5) comprises a gasket (51), a spring (52) and a threaded hole (53). The gasket (51) is mounted on the top end of the telescopic column (5). The spring (52) surrounds the outside of the telescopic column (5), one end of which is connected to the inner shell (1) and the other end of which is connected to the gasket (51). The threaded hole (53) is arranged at the center of the gasket (51).
6. The intelligent air switch with explosion-proof function according to claim 1 is characterized in that: The housing (6) comprises a positioning hole (61), a screw thread (62) and a vent (63); the positioning hole (61) is arranged on the surface of the housing (6) and its position corresponds to the position of the telescopic column (5); the screw thread (62) passes through the positioning hole (61) and is connected to the telescopic column (5); and the vent (63) is arranged on the side of the housing (6).
7. The intelligent air switch with explosion-proof function according to claim 1 is characterized in that: The switch valve (7) comprises an elastic frame (71), a rotating shaft (72) and a conductive plate (73). The rotating shaft (72) is installed in the cavity of the inner shell (1). The elastic frame (71) rotates around the rotating shaft (72). One side of the elastic frame (71) is located below the coil (3), and the other side is connected to the switch valve (7). One end of the conductive plate (73) is connected to the coil (3), and the middle part of the conductive plate (73) is connected to the elastic frame (71).
8. The intelligent air switch with explosion-proof function according to claim 7, characterized in that: The conductive plate (73) comprises a wiring (731) and a metal plate (732), wherein the wiring (731) is connected below the conductive plate (73) and is connected to the metal plate (732), and the metal plate (732) is connected to an interface (2) at a side away from the coil (3).