Electric power distribution box capable of resisting instant-lap sparks

Abstract

The invention discloses an instantaneous-spark-resistant power distribution box, which is characterized by comprising a distribution box body, an air switch group and an instantaneous-spark-resistant fire-fighting switch, the air switch group and the anti-instantaneous-lap-spark fire-fighting switches are respectively arranged in the distribution box body, the number of air switches in the air switch group is twice that of the anti-instantaneous-lap-spark fire-fighting switches, and each anti-instantaneous-lap-spark fire-fighting switch is connected with two air switches. The instant-lap-spark-resistant fire-fighting switch comprises a magnetorheological fluid assembly and a shunt assembly, the magnetorheological fluid assembly and the shunt assembly are connected in parallel to form a shunt circuit, and if current flowing through an electromagnetic coil is large, magnetorheological fluid in a magnetorheological fluid storage pipe changes under the influence of a magnetic field generated by the electromagnetic coil, so that the magnetorheological fluid in the magnetorheological fluid storage pipe is separated from the shunt circuit. Therefore, the current of the main circuit can be prevented from being too large, electric sparks are prevented from being generated under the conditions of wire lapping and the like, and safe and stable operation of a circuit system is effectively protected.

Description

Technical Field

[0001] The invention relates to the technical field of distribution boxes, and in particular to an instantaneous spark-resistant power distribution box. Background Art

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] In the use of power distribution boxes, instantaneous sparks are a common but dangerous problem. When the circuit is connected or closed, the instantaneous current impact may cause sparks, which will not only damage the equipment on the circuit, but also cause fire and other safety accidents. Especially in some occasions with high requirements for current stability, such as industrial production, medical equipment and other fields, the problem of instantaneous sparks is more prominent.

[0004] Traditional distribution boxes often use some conventional protection measures to deal with instantaneous spark problems, such as circuit breakers, fuses, air switches, etc. However, these measures may not be able to effectively prevent the generation of sparks in a timely manner in some cases. For example, when the load current suddenly changes or short-circuits, the response speed of traditional protection devices may not be fast enough to quickly cut off the circuit, resulting in the generation of sparks. Improper operation during the wiring process, or forced closing of the circuit breaker without eliminating the fault, may all lead to the generation of sparks. Traditional protection devices have limited ability to prevent such human factors, which can easily cause casualties to workers.

[0005] In addition, with the increase in circuit load and the complexity of circuit systems, higher requirements are placed on the safety and stability of distribution boxes. In actual applications, due to abnormal loads, circuit aging and other reasons, the temperature inside the distribution box may rise suddenly, which also increases the risk of sparks and fires. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides an electric power distribution box that is resistant to instantaneous sparks, which solves the problem of sparks caused by abnormal load or wiring during wiring. Through the design of the shunt circuit, part of the current can be coordinated to flow to the branch to protect the equipment and load on the main circuit, thereby avoiding excessive current in the main circuit and preventing sparks from being generated in wiring situations, thereby effectively protecting the safe and stable operation of the circuit system.

[0007] A spark-resistant power distribution box comprises a distribution box body, an air switch group and an spark-resistant fire switch; the air switch group and the spark-resistant fire switch are respectively arranged in the distribution box body, the number of air switches in the air switch group is twice the number of spark-resistant fire switches, and each spark-resistant fire switch is connected to two air switches.

[0008] Furthermore, the anti-instantaneous spark fire switch includes a fire switch housing, a shielding cover, a shunt component and a magnetorheological fluid component; the two ends of the fire switch housing are respectively provided with a front terminal and a rear terminal, the shielding cover is arranged in the fire switch housing, the shunt component and the magnetorheological fluid component are respectively arranged in the shielding cover, the magnetorheological fluid component is connected to the rear terminal, and the shunt component is connected to the front terminal.

[0009] Furthermore, the air switches in the air switch group are divided into two groups, one group is connected to the magnetorheological fluid component through the rear terminal, and the other group is connected to the shunt component through the copper component, the terminal and the wire. The shunt component is connected in parallel with the magnetorheological fluid component, and the shunt component is the shunt circuit of the magnetorheological fluid component.

[0010] Furthermore, the magnetorheological fluid assembly includes a magnetorheological fluid storage tube, a main wiring copper body, a rear wiring copper body and a lifting tube; the magnetorheological fluid storage tube is connected to the rear wiring terminal through the rear wiring copper body, and the connection can be welding. The magnetorheological fluid storage tube is connected to the rear wiring terminal through the main wiring copper body and the connecting device. Magnetorheological fluid is stored in the magnetorheological fluid storage tube, and an air valve is installed on the top of the magnetorheological fluid storage tube.

[0011] Furthermore, the connection device includes a lifting tube connected to the bottom of the magnetorheological fluid storage tube and an electromagnet provided on the front terminal. The top of the lifting tube is limitedly slidably connected to a driving terminal block. When the anti-instantaneous spark fire switch is working, the electromagnet attracts the driving terminal block to move so as to connect the circuit. An insulating seat is connected above the front terminal, a button switch is fixedly connected to the top of the insulating seat, an electromagnet is installed at the bottom of the button switch, and the electromagnet is electrically connected to the button switch.

[0012] Furthermore, the conductive rods on the front and rear side walls of the magnetorheological fluid storage tube, which are respectively used to connect the main wiring copper body and the rear wiring copper body, are in contact with the magnetorheological fluid inside the magnetorheological fluid storage tube.

[0013] Furthermore, the shunt component includes an electromagnetic coil and a winding rod group; the electromagnetic coil is wound around the outside of the winding rod group, and the electromagnetic coil is connected to the front terminal through a front wiring copper body and a connecting device. When current flows through the electromagnetic coil, the electromagnetic coil excites a magnetic field, and the magnetic field affects the state of the magnetorheological fluid.

[0014] Furthermore, a built-in power supply is provided on the outside of the shielding cover, the battery wiring copper body and the push button switch are welded to the charging end of the built-in power supply, the discharge end of the built-in power supply is connected to a lifting electric cylinder, the movable end of the lifting electric cylinder is connected to an elastic air storage bag, the top of the elastic air storage bag is connected to a detection rod, the magnetorheological fluid assembly also includes a detection bent rod, and the top of the detection rod is limitedly slidably connected to the tube of the detection bent rod.

[0015] Furthermore, the elastic air storage bag is connected to a high-pressure air storage tank. A bellows is fixedly connected to the center of the rear side wall of the elastic air storage bag, and an air injection pipe is fixedly connected to the rear end of the bellows, and the other end of the air injection pipe is connected to the high-pressure air storage tank.

[0016] Furthermore, the elastic air storage bag is provided with an air release port, which is directly opposite to the inner cavity in the fire switch housing for engaging the main wiring copper body, the front wiring copper body, the drive wiring seat and the front wiring terminal.

[0017] Furthermore, the shielding cover is made of magnetic shielding material.

[0018] The beneficial effects of this program are:

[0019] The magnetorheological fluid component and the shunt component are connected in parallel to form a shunt circuit. If the current flowing through the electromagnetic coil is large, the magnetorheological fluid in the magnetorheological fluid storage tube is affected by the magnetic field generated by the electromagnetic coil, and the internal magnetic particles are rapidly arranged into a chain or columnar structure along the direction of the magnetic field, so that the viscosity and yield strength of the magnetorheological fluid increase instantly. Due to the change in the state of the magnetorheological fluid, its resistance will increase sharply. According to Ohm's law, the increase in resistance will lead to a decrease in current. Therefore, more current will flow from the shunt circuit and flow into the circuit monitoring equipment, thereby adjusting the power supply of the load. At the same time, the current flowing through the main circuit is reduced, which can avoid excessive current in the main circuit, thereby preventing electric sparks in cases such as wiring, and effectively protecting the safe and stable operation of the circuit system.

[0020] After the internal wiring of the distribution box is completed and the air switch is combined, if a short circuit or a sudden change in load current occurs, the magnetic field intensity flowing through the electromagnetic coil becomes higher. At this time, the magnetorheological fluid inside the magnetorheological fluid storage tube will be converted from Newtonian fluid to Bingham fluid, increasing the viscosity and yield strength of the magnetorheological fluid. At this time, because the magnetorheological fluid inside the magnetorheological fluid storage tube behaves in a quasi-solid state, the magnetic force generated by the electromagnet cannot overcome the friction between the magnetorheological fluid and the inner wall of the magnetorheological fluid storage tube, making it impossible for the drive terminal block to continue to rise, which in turn causes the main circuit to be unable to be smoothly connected, avoiding damage to the main circuit equipment caused by instantaneous current shock due to wiring short circuit. Secondly, it can effectively prevent electrical faults caused by overload of the main circuit, such as tripping, equipment burning, etc. At the same time, it can protect the main circuit and extend its service life.

[0021] When the distribution box is working normally, if the current flowing through the electromagnetic coil is too large, the detection rod will be blocked during the lifting process, and the elastic air storage bag will produce a certain deformation. When the elastic air storage bag is deformed, the vent will also deform, causing the high-pressure gas stored in the elastic air storage bag to be discharged. When the high-pressure gas is discharged, it will be quickly blown into the inner cavity of the shielding cover, thereby reducing the temperature of the magnetorheological fluid assembly, shunt assembly, drive terminal block and front terminal, and filling these components with inert gas to avoid the occurrence of safety accidents caused by electric sparks due to sudden temperature rise caused by current changes.

[0022] If the current fluctuation range is too large, the magnetorheological fluid in the magnetorheological fluid storage tube will change to a quasi-solid state. At this time, the detection rod will be completely unable to move in the detection curved rod, and the elastic air storage bag will be excessively deformed. The entire elastic air storage bag will be completely damaged, and the high-pressure gas will be directly ejected from the bellows, thereby quickly cooling down the entire distribution box, fully avoiding the occurrence of safety accidents such as fire caused by abnormal load or circuit aging.

[0023] If the load abnormality lasts for a long time, the detection rod will be blocked in the detection curved rod for a long time, which will also cause the elastic air storage bag to be excessively deformed and damaged, and the high-pressure gas will be directly blown out. This design can provide a certain buffer time for load adjustment. After the gate is opened, the electromagnet loses its magnetic force. At this time, under the action of gravity, the magnetorheological fluid in the lifting tube will flow back into the magnetorheological fluid storage tube, driving the wiring seat to reset, and the entire anti-instantaneous spark fire switch will automatically break the circuit, avoiding the occurrence of safety accidents caused by negligence of the staff and direct wiring on the anti-instantaneous spark fire switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, and the above and / or other advantages of the present invention will become more clear.

[0025] Figure 1 The figure is a schematic diagram of the interior of the power distribution box resistant to instantaneous sparks of the present invention.

[0026] Figure 2 The figure is an external front view of the instantaneous spark resistant power distribution box of the present invention.

[0027] Figure 3 The present invention is a three-dimensional diagram of an anti-instantaneous spark power distribution box.

[0028] Figure 4 The diagram is a connection diagram of the anti-instantaneous spark fire switch and the high-pressure gas storage tank of the present invention.

[0029] Figure 5 The internal structure of the anti-instantaneous spark fire switch of the present invention Figure 1 .

[0030] Figure 6 This is a partial enlarged view of the anti-instantaneous spark fire switch of the present invention.

[0031] Figure 7 The internal structure of the anti-instantaneous spark fire switch of the present invention Figure 2 .

[0032] Figure 8 The internal structure of the anti-instantaneous spark fire switch of the present invention Figure 3 . DETAILED DESCRIPTION

[0033] The reference numerals in the accompanying drawings are: 1-distribution box body; 2-air switch group; 3-anti-instantaneous spark fire switch; 31-fire switch housing; 310-front terminal; 311-insulating seat; 312-button switch; 313-electromagnet; 314-rear terminal; 315-drive terminal seat; 316-vent; 32-built-in power supply; 33-bellows; 34-elastic air storage bag; 35-lifting electric cylinder; 36-detection rod; 37-shielding cover; 38-shunt assembly; 381-electromagnetic coil; 382-front wiring copper body; 383-winding rod group; 384-battery wiring copper body; 39-magnetorheological fluid assembly; 391-magnetorheological fluid storage tube; 392-main wiring copper body; 393-detection bent rod; 394-rear wiring copper body; 395-lifting tube; 396-gas valve; 4-high-pressure gas storage tank; 5-gas injection pipe.

[0034] Embodiment 1

[0035] like Figure 1 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, an embodiment of the present invention provides an anti-instantaneous spark power distribution box, comprising a distribution box body 1 and an air switch group 2 arranged inside the distribution box body 1, and a plurality of anti-instantaneous spark fire switches 3 are installed at the bottom of the distribution box body 1, wherein the number of air switches in the air switch group 2 is twice that of the anti-instantaneous spark fire switches 3,

[0036] The anti-instantaneous spark fire switch 3 includes a fire switch housing 31, a front terminal 310 is embedded and installed at the front position of the top of the fire switch housing 31, a rear terminal 314 is embedded and installed at the rear position of the top of the fire switch housing 31, a shielding cover 37 is installed in the middle position of the fire switch housing 31, the shielding cover 37 is made of magnetic shielding material to avoid mutual interference between internal and external magnetic fields, a magnetorheological fluid component 39 is installed at the upper end of the shielding cover 37, and a shunt component 38 is installed at the lower end of the shielding cover 37.

[0037] The air switches in the air switch group 2 are divided into two groups, one group of air switches is connected to the magnetorheological fluid component 39 through the rear terminal 314, and the other group of air switches is connected to the shunt component 38 through the front terminal 310 and the drive terminal block 315. The shunt component 38 is connected in parallel with the magnetorheological fluid component 39, wherein the shunt component 38 constitutes a shunt circuit of the magnetorheological fluid component 39, and utilizes parallel shunt to coordinate the current of the circuit on the main circuit.

[0038] like Figure 7 and Figure 8 As shown, the magnetorheological fluid assembly 39 includes a magnetorheological fluid storage tube 391, the front side wall of the magnetorheological fluid storage tube 391 is fixedly connected to a main wiring copper body 392, the rear side of the magnetorheological fluid storage tube 391 is fixedly connected to a rear wiring copper body 394, the rear wiring copper body 394 is welded to the rear wiring terminal 314, the bottom of the magnetorheological fluid storage tube 391 is fixedly connected to a lifting tube 395, and an air valve 396 is installed on the top of the magnetorheological fluid storage tube 391, the air valve 396 maintains the air pressure balance inside the magnetorheological fluid storage tube 391, and the magnetorheological fluid assembly 39 and a group of air switches constitute a main circuit.

[0039] like Figure 7 and Figure 8 As shown, the top of the lifting tube 395 is limitedly and slidably connected to a driving terminal seat 315 through an insulating rod, and the driving terminal seat 315 can be made of conductive materials such as copper; the top of the front terminal 310 is connected to an insulating seat 311, and the top of the insulating seat 311 is fixedly connected to a button switch 312, and the bottom of the button switch 312 is installed with an electromagnet 313, and the electromagnet 313 is electrically connected to the button switch 312, and the magnetorheological fluid is stored in the magnetorheological fluid storage tube 391, and the conductive rods on the front and rear side walls of the magnetorheological fluid storage tube 391, which are respectively used to connect the main wiring copper body 392 and the rear wiring copper body 394, are in contact with the magnetorheological fluid inside the magnetorheological fluid storage tube 391.

[0040] The shunt assembly 38 includes a winding rod group 383, the outside of which is wound with a spiral electromagnetic coil 381, and the front end of the electromagnetic coil 381 is fixedly connected to a front wiring copper body 382. The shunt assembly 38 is a protection circuit for shunt. When current flows through the electromagnetic coil 381, a magnetic field is excited around the electromagnetic coil 381, and the magnetic field affects the magnetorheological fluid inside the magnetorheological fluid storage tube 391 above it.

[0041] During normal operation, the front wiring copper body 382 and the main wiring copper body 392 are in contact with the drive wiring seat 315, the upper part of the middle slot of the drive wiring seat 315 is in contact with the main wiring copper body 392, and the lower part of the slot of the drive wiring seat 315 is in contact with the front wiring copper body 382. The drive wiring seat 315 as a whole is actually composed of two conductors, which are separated by an insulating material in the middle position of the two conductors. In the process of rising, since the top of the drive wiring seat 315 is inclined, the drive wiring seat 315 first contacts the front wiring terminal 310, and then contacts the front wiring. The copper body 382 is in contact, which can improve the stability of power connection, because connecting to the power terminal first can form a stable electrical path on the power side first, and then connecting the load terminal after the power side is stable, so that the entire circuit can establish a connection in a more stable state, which helps to reduce the voltage and current fluctuations caused by the interaction between the power supply and the load (such as capacitor charging, inductor energy storage, etc.) at the moment of circuit connection, improve the stability of circuit operation, and reduce electromagnetic interference caused by circuit fluctuations to other related equipment (such as other sensitive equipment in the same power grid as the circuit).

[0042] If a short circuit or a sudden change in load current occurs, the magnetic field intensity flowing through the electromagnetic coil 381 becomes higher. At this time, the magnetorheological fluid inside the magnetorheological fluid storage tube 391 will be converted from a Newtonian fluid to a Bingham fluid, increasing the viscosity and yield strength of the magnetorheological fluid. At this time, because the magnetorheological fluid inside the magnetorheological fluid storage tube 391 is in a quasi-solid state, the magnetic force generated by the electromagnet 313 cannot overcome the friction between the magnetorheological fluid and the inner wall of the magnetorheological fluid storage tube 391. At this time, the magnetorheological fluid cannot flow, which causes the insulating rod under the drive terminal block 315 to be unable to pull the magnetorheological fluid inside the lifting tube 395 to continue to rise, making the drive terminal block 315 unable to continue to rise, and then causing the main circuit to be unable to be smoothly connected, avoiding damage to the main circuit equipment caused by instantaneous current shock due to wiring short circuit. Secondly, it can effectively prevent electrical faults caused by overload of the main circuit, such as tripping, equipment burning, etc. At the same time, it can protect the main circuit and extend its service life.

[0043] After the shunt circuit is connected, if the current flowing through the electromagnetic coil 381 is large, but the magnetorheological fluid in the magnetorheological fluid storage tube 391 cannot be converted into a solid-like Bingham fluid, the driving terminal block 315 can still rise normally under the attraction of the electromagnet 313, but the magnetorheological fluid in the magnetorheological fluid storage tube 391 is under the influence of the magnetic field generated by the electromagnetic coil 381, and the internal magnetic particles are rapidly arranged into a chain or columnar structure along the direction of the magnetic field, so that the viscosity and yield strength of the magnetorheological fluid increase instantly. Due to the change in the state of the magnetorheological fluid, its resistance will increase sharply. According to Ohm's law, an increase in resistance will lead to a decrease in current. Therefore, more current will flow from the shunt circuit and flow into the circuit monitoring equipment, thereby increasing the power supply of the load. At the same time, the current flowing through the main circuit is reduced, which can avoid excessive current in the main circuit, thereby preventing electric sparks in situations such as wiring, and effectively protecting the safe and stable operation of the circuit system.

[0044] Embodiment 2

[0045] like Figure 5 , Figure 7 and Figure 8 As shown, this embodiment provides another technical solution based on the first embodiment. The rear end of the electromagnetic coil 381 is connected to a battery wiring copper body 384, and a built-in power supply 32 is embedded on the outside of the shielding cover 37. The battery wiring copper body 384 and the push button switch 312 are welded to the charging end of the built-in power supply 32. The discharge end of the built-in power supply 32 is connected to a lifting cylinder 35. The movable end of the lifting cylinder 35 is connected to an elastic air storage bag 34, and a detection rod 36 is fixedly connected to the top of the elastic air storage bag 34. The magnetorheological fluid assembly 39 also includes a detection bent rod 393. The top limit sliding connection of the detection rod 36 is inside the tube of the detection bent rod 393.

[0046] When the distribution box is working normally, the lifting cylinder 35 will drive the elastic air storage bag 34 to rise and fall repeatedly. If the current flowing through the electromagnetic coil 381 is too large at this time, thereby increasing the stiffness of the magnetorheological fluid in the magnetorheological fluid storage tube 391, the detection rod 36 will be blocked during the lifting process, and the active end of the lifting cylinder 35 will still perform repeated lifting actions. At this time, the elastic air storage bag 34 located between the detection rod 36 and the active end of the lifting cylinder 35 will be stretched or compressed, causing it to undergo a certain deformation. When the elastic air storage bag 34 is deformed, the vent 316 will also deform, causing the high-pressure gas stored in the elastic air storage bag 34 to be discharged. When the high-pressure gas is discharged, it will be quickly blown into the inner cavity of the shielding cover 37, thereby reducing the temperature of the magnetorheological fluid component 39, the shunt component 38, the drive terminal block 315 and the front terminal 310, and filling these components with inert gas to avoid the occurrence of safety accidents caused by electric sparks due to sudden temperature rise caused by current changes.

[0047] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 7 and Figure 8 As shown, a bellows 33 is fixedly connected at the center of the rear side wall of the elastic air storage bag 34, and an air injection pipe 5 is fixedly connected to the rear end of the bellows 33. The other end of the air injection pipe 5 is connected to the high-pressure air storage box 4. An air vent 316 is installed at the center of the front side wall of the elastic air storage bag 34. The air vent 316 is opposite to the inner cavity in the fire switch housing 31 for engaging the main wiring copper body 392, the front wiring copper body 382, ​​the drive wiring seat 315 and the front wiring terminal 310.

[0048] If the current fluctuation range is too large, the magnetorheological fluid in the magnetorheological fluid storage tube 391 will change to a quasi-solid state. At this time, the detection rod 36 cannot move in the detection curved rod 393 at all, and the elastic air storage bag 34 will be over-deformed. The entire elastic air storage bag 34 will be completely damaged, and the high-pressure gas will be directly ejected from the bellows 33, thereby quickly cooling the entire distribution box, fully avoiding the occurrence of safety accidents such as fire caused by abnormal load or circuit aging. Similarly, if the load abnormality lasts for a long time, the detection rod 36 will be blocked in the detection curved rod 393. A long time will also cause the elastic air storage bag 34 to be excessively deformed and damaged, and the high-pressure gas will be directly blown out. This design can provide a certain buffer time for load adjustment. After the gate is opened, the electromagnet 313 loses its magnetic force. At this time, under the action of gravity, the magnetorheological fluid in the lifting tube 395 will flow back into the magnetorheological fluid storage tube 391, driving the terminal block 315 to reset, and the entire anti-instantaneous spark fire switch 3 will automatically break the circuit, avoiding the occurrence of safety accidents caused by negligence of the staff and direct wiring on the anti-instantaneous spark fire switch 3.

[0049] The present invention aims to suppress the anti-instantaneous spark of an electric power distribution box, comprising a distribution box body and an air switch group arranged inside the distribution box body, a plurality of anti-instantaneous spark fire switches are installed at the bottom of the distribution box body, wherein the number of air switches in the air switch group is twice that of the anti-instantaneous spark fire switch, the anti-instantaneous spark fire switch comprises a fire switch housing, a front wiring terminal is embedded and installed at the front position of the top of the fire switch housing, a rear wiring terminal is embedded and installed at the rear position of the top of the fire switch housing, and a shielding cover is installed at the middle position of the fire switch housing;

[0050] A magnetorheological fluid component is installed at the upper end of the shielding cover, a magnetorheological fluid component is installed at the upper end of the shielding cover, and a flow diversion component is installed at the lower end of the shielding cover;

[0051] The air switches in the air switch group are divided into two groups, one group of air switches is connected to the magnetorheological fluid component through the rear terminal, and the other group of air switches is connected to the shunt component through the copper component, the terminal and the wire. The shunt component is connected in parallel with the magnetorheological fluid component, and the shunt component constitutes a shunt circuit of the magnetorheological fluid component.

[0052] The present invention provides a concept and method for an electric power distribution box that resists instantaneous sparks. There are many methods and ways to implement the technical solution. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention. All components not specified in this embodiment can be implemented using existing technologies.

Claims

1. A power distribution box resistant to instantaneous sparks, characterized in that: The invention comprises a distribution box body (1), an air switch group (2) and an anti-instantaneous spark fire switch (3); the air switch group (2) and the anti-instantaneous spark fire switch (3) are respectively arranged in the distribution box body (1); the number of air switches in the air switch group (2) is twice the number of the anti-instantaneous spark fire switch (3); and each anti-instantaneous spark fire switch (3) is connected to two air switches.

2. The instantaneous spark resistant power distribution box according to claim 1, characterized in that: The anti-instantaneous spark fire switch (3) comprises a fire switch housing (31), a shielding cover (37), a flow shunt component (38) and a magnetorheological fluid component (39); two ends of the fire switch housing (31) are respectively provided with a front wiring terminal (310) and a rear wiring terminal (314); the shielding cover (37) is arranged in the fire switch housing (31); the flow shunt component (38) and the magnetorheological fluid component (39) are respectively arranged in the shielding cover (37); the magnetorheological fluid component (39) is connected to the rear wiring terminal (314); and the flow shunt component (38) is connected to the front wiring terminal (310).

3. The instantaneous spark resistant power distribution box according to claim 2, characterized in that: The air switches in the air switch group (2) are divided into two groups, one group is connected to the magnetorheological fluid component (39) through the rear terminal (314), and the other group is connected to the shunt component (38) through the copper component, the terminal and the wire. The shunt component (38) is connected in parallel with the magnetorheological fluid component (39), and the shunt component (38) is a shunt circuit of the magnetorheological fluid component (39).

4. The instantaneous spark resistant power distribution box according to claim 3, characterized in that: The magnetorheological fluid component (39) comprises a magnetorheological fluid storage tube (391), a main wiring copper body (392), a rear wiring copper body (394) and a lifting tube (395); the magnetorheological fluid storage tube (391) is connected to the rear wiring terminal (314) via the rear wiring copper body (394), the magnetorheological fluid storage tube (391) is connected to the rear wiring terminal (314) via the main wiring copper body (392) and a connecting device, and magnetorheological fluid is stored in the magnetorheological fluid storage tube (391).

5. The instantaneous spark resistant power distribution box according to claim 4, characterized in that: The connection device comprises a lifting tube (395) connected to the bottom of the magnetorheological fluid storage tube (391) and an electromagnet (313) arranged on the front terminal (310); the top of the lifting tube (395) is limitedly slidably connected to a driving terminal block (315); when the anti-instantaneous spark fire switch (3) is in operation, the electromagnet (313) attracts the driving terminal block (315) to move so as to connect the circuit.

6. The instantaneous spark resistant power distribution box according to claim 5, characterized in that: The shunt assembly (38) comprises an electromagnetic coil (381) and a winding rod group (383); the electromagnetic coil (381) is wound around the outside of the winding rod group (383); the electromagnetic coil (381) is connected to the front wiring terminal (310) through a front wiring copper body (382) and a connecting device; when current flows through the electromagnetic coil (381), the electromagnetic coil (381) excites a magnetic field, and the magnetic field affects the state of the magnetorheological fluid.

7. The instantaneous spark resistant power distribution box according to claim 6, characterized in that: The shielding cover (37) is provided with a built-in power supply (32) on the outside, the discharge end of the built-in power supply (32) is connected to a lifting electric cylinder (35), the movable end of the lifting electric cylinder (35) is connected to an elastic air storage bag (34), the top of the elastic air storage bag (34) is connected to a detection rod (36), and the magnetorheological fluid component (39) also includes a detection curved rod (393), and the top of the detection rod (36) is limitedly slidably connected in the tube of the detection curved rod (393).

8. The instantaneous spark resistant power distribution box according to claim 7, characterized in that: The elastic air storage bag (34) is provided with an air release port (316).

9. The instantaneous spark resistant power distribution box according to claim 8, characterized in that: The elastic air storage bag (34) is connected to the high-pressure air storage box (4).

10. The instantaneous spark resistant power distribution box according to claim 2, characterized in that: The shielding cover (37) is made of magnetic shielding material.

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