Dual-power switching box

Abstract

The invention belongs to the technical field of dual-power-supply switch boxes, and particularly relates to a dual-power-supply switching box which comprises a box body and a static change-over switch installed in the box body, flame-retardant partition plates and a cover plate are further installed in the box body, and the two flame-retardant partition plates are arranged side by side and used for dividing the inner space of the box body into three unit cavities; wiring assemblies used for allowing cables to penetrate through penetrate through the unit cavities, the cover plates are arranged at openings of the unit cavities, rubber films and butt clamps penetrate through the cover plates, the two butt clamps are arranged in pairs, and an elastic rope and a fire extinguishing bottle are arranged between the two butt clamps. During maintenance, the butt clamp is pulled by the elastic rope to clamp the wiring assembly so as to hang the cover plate and cover the unit cavity, so that external moisture is blocked. The three unit cavities are separated and sealed through the cover plates, each unit cavity is opened during maintenance, all switches are prevented from being exposed in a humid environment, the overall humidity resistance is improved, and the cover plates automatically fall off and are opened for heat dissipation by loosening the butt clamps during thermal runaway.

Description

Technical Field

[0001] The present invention belongs to the technical field of dual-power supply switch boxes, and particularly relates to a dual-power supply switching box. Background Art

[0002] A dual-power supply switching box is based on intelligent control and automatically switches to a standby power supply when the main power supply fails to ensure continuous and stable power supply. Among them, the STS (Static Transfer Switch) continuously monitors the status of the two power supplies, including parameters such as voltage, frequency, and phase. When a power supply failure or a situation that does not meet the preset working range occurs, it determines whether a power supply switch is required according to the fault detection result.

[0003] The alloy components of the two power supplies need to be waterproof and moisture-proof, and a dual-power supply switching box is often used for external protection. For example, a Chinese invention with the publication number CN114256008A discloses a dual-power supply switch, which mainly uses a fan and a condensing pipe to gather moisture in the air, and then absorbs this part of moisture through silica gel desiccants to prevent water vapor from wetting metal components. There are still the following points to be improved: 1. When the dual-power supply switching box is opened, the STS is directly exposed to the air. For example, in humid southern conditions and considering the time required for maintenance, metal components and manual operation knobs may rust due to contact with moisture in the air, easily causing phenomena such as electric leakage, creepage, or short circuit, which is not conducive to its internal moisture-proof performance.

[0004] 2. Inside the dual-power supply switching box, there is a gap between the STS and the air switch, but they are not separately isolated. If any one of them short-circuits and generates heat, it is easy to cause the temperature of the other to rise, which is not conducive to curbing thermal runaway inside the box. Summary of the Invention

[0005] The purpose of the present invention is to provide a dual-power supply switching box, which separates three unit cavities and seals them with a cover plate. When performing maintenance, each unit cavity can be opened individually to avoid all switches being exposed to a humid environment, improving the overall moisture-proof performance. When thermal runaway occurs, the cover plate automatically falls off by loosening the clamp to allow heat dissipation.

[0006] The technical solution adopted by the present invention is specifically as follows: A dual-power supply switching box includes a box body and a static transfer switch installed inside the box body. The following are also installed inside the box body: Flame-retardant partitions, two of which are arranged side by side to divide the internal space of the box body into three unit cavities, and each unit cavity is penetrated by a wiring component for passing through cables; Cover plates, which are arranged at the openings of the unit cavities. The cover plates are penetrated by rubber membranes and clamps. Two of the clamps are arranged in pairs, and an elastic rope and a fire extinguisher are arranged between the two clamps; During maintenance, the clamp is clamped under the pulling of the elastic rope to hold the wiring assembly, so as to hang the cover plate to cover the unit cavity, thereby blocking external moisture. In case of thermal runaway, through the explosion of the fire extinguisher under heat, the fire extinguishing agent is ejected to contain the thermal runaway, and the clamp is released, so that the cover plate automatically falls off to open heat dissipation.

[0007] As an alternative, the wiring assembly includes a wire pipe passing through the unit cavity, two semi-circular rubber plugs located at the ports of the wire pipe, and a lining film arranged on the surface of the semi-circular rubber plugs; When the clamp is clamped, the wire pipe and the semi-circular rubber plugs are deformed to stick to the cable, so as to block external moisture, thereby improving the sealing degree of the unit cavity.

[0008] As an alternative, frames for supporting the cover plate and guide posts fixed on the outer surfaces of the frames are fixed at the edges of the three unit cavities, and a glass viewing window and a magnetic ring for attracting the guide posts are arranged at intervals on the cover plate; When the magnetic ring sleeves the guide post, the clamp is limited and faces the wire pipe.

[0009] As an alternative, a hollow cage located inside the unit cavity and a desiccant located inside the hollow cage are arranged on the surface of the rubber film. The hollow cage is in a hollow ring shape to limit the clamp. When humid air circulates inside the unit cavity, moisture is absorbed by the desiccant.

[0010] As an alternative, a center ball for limiting the clamp and an isolation strip connected to the center ball penetrate through the middle of the rubber film. When the clamp is pressed, the clamp swings around the center ball and the isolation strip.

[0011] As an alternative, an arc-shaped clamp head adapted to the wire pipe, a friction protrusion installed on the inner side of the arc-shaped clamp head, and a magnetic ball installed at the end of the arc-shaped clamp head are arranged at one end of the clamp. When two adjacent magnetic balls attract each other, the arc-shaped clamp head and the friction protrusion are driven to squeeze the wire pipe, and a limit sleeve for limiting the arc-shaped clamp head is sleeved on the outer surface of the wire pipe; Among them, the friction protrusion is made of granular water-absorbing resin material and is used for absorbing moisture in the unit cavity.

[0012] As an alternative, a loop is hinged to the end of one clamp, and a hook is fixed to the end of the other clamp. When the clamp is pressed, the loop hooks the hook to lock the clamp in the open state, so as to free the hands.

[0013] As an optional solution, a pressing portion for rubbing against a hand and a heat conductive wire are fixed to the outer side of the pair of clips, and the heat conductive wire partially penetrates the pair of clips to conduct the heat inside the unit cavity and dissipate it to the external environment through its exposed part.

[0014] As an optional solution, the fire extinguisher bottle is provided with interconnected hollow glass beads and traction wires, and the hollow glass beads are filled with any one of carbon dioxide, nitrogen, argon and neon. When thermal runaway occurs, the hollow glass beads burst due to the heat and are used to burst the fire extinguisher bottle.

[0015] As an optional solution, a lubricating oil tank, a sealing cover located at the mouth of the lubricating oil tank, and an oiling brush passing through the sealing cover are hung on the outside of the box body. During maintenance, the lubricating oil in the lubricating oil tank is dipped into the oiling brush and applied to the static transfer switch to prevent moisture.

[0016] The technical effects achieved by the present invention are: The interior of the box of the present invention is divided into three unit cavities of the same size, and the three switches are sealed and separated, which is conducive to curbing the thermal runaway inside the box, preventing the fire from spreading, and providing precious rescue time for fire rescue; at the same time, the clamps clamp the threading tube to hang the cover plate to cover the unit cavity, thereby blocking external moisture, and squeezing the threading tube and the half-moon-shaped rubber plug to deform and stick to the cable, further improving the airtightness of the unit cavity. During maintenance, the cover plate is opened individually to expose only the switch to be repaired, avoiding all switches from being exposed to a humid environment, and improving the overall moisture-proof performance. When thermal runaway occurs, the fire extinguisher bottle bursts due to heat, spraying the fire extinguishing agent to curb the thermal runaway, and the clamps are loosened to make the cover plate automatically fall off and open for heat dissipation.

[0017] The clamping device of the present invention drives the arc-shaped clamping head and the friction protrusion to squeeze the threading tube. On the one hand, the friction effect is used to achieve biting and anti-slipping. On the other hand, the threading tube and the half-moon-shaped rubber plug are squeezed to fit tightly against the cable. The friction protrusion is made of a granular water-absorbing resin material, which has a certain hardness to squeeze the threading tube and can be used for emergency moisture absorption when the unit cavity is opened. Once the friction protrusion softens and fails, the entire cover plate can be replaced with a dry friction protrusion.

[0018] When the clamp is pressed, the clip is hooked by flipping the paper buckle, and after releasing the hand, the clamp in the open state is locked, thereby freeing the hand and keeping the clamp in the open state. When the cover plate is transferred, the clamp automatically covers the threading tube, and then the paper buckle and the hook are separated one by one. Under the rebound effect of the elastic rope, the clamp is automatically clamped, so that the cover plate can be installed at one time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view of a dual power switching box in a closed state in the first embodiment of the present invention; Figure 2It is the front view of a dual - power switching box in the open state in Embodiment 1 of the present invention; Figure 3 It is the front view of three unit cavities in Embodiment 1 of the present invention; Figure 4 It is the front view of the wiring state of the static transfer switch in Embodiment 1 of the present invention; Figure 5 It is the front view of the static transfer switch located in the unit cavity in Embodiment 1 of the present invention; Figure 6 It is the rear view of the cover plate in Embodiment 1 of the present invention; Figure 7 It is the top view of the clamp in Embodiment 1 of the present invention; Figure 8 It is the side view of the clamp in Embodiment 1 of the present invention; Figure 9 It is the bottom view of the rubber membrane in Embodiment 1 of the present invention; Figure 10 It is the sectional view of the fire extinguisher bottle in Embodiment 1 of the present invention; Figure 11 It is the top view of the wire threading pipe in Embodiment 1 of the present invention; Figure 12 It is the front view of the lubricating oil tank in the open state in Embodiment 1 of the present invention; Figure 13 It is a schematic diagram of a dual - power switching box connected to the power grid in Embodiment 2 of the present invention.

[0020] In the attached drawings, the list of components represented by each label is as follows: 1. Box body; 2. Static transfer switch; 201. Main air switch; 202. Sub - air switch; 3. Flame - retardant partition; 301. Wire threading pipe; 302. Semi - circular rubber plug; 303. Lining film; 4. Cover plate; 401. Frame; 402. Glass viewing window; 403. Guide post; 404. Magnetic ring; 5. Rubber membrane; 501. Hollow cage; 502. Desiccant; 503. Central ball; 504. Isolation strip; 6. Clamp; 601. Arc - shaped chuck; 602. Friction protrusion; 603. Magnetic ball; 604. Limit sleeve; 605. Return - shaped buckle; 606. Hook; 607. Pressing part; 608. Heat - conducting wire; 7. Elastic rope; 8. Fire extinguisher bottle; 801. Hollow glass bead; 802. Traction wire; 9. Lubricating oil tank; 901. Sealing cover; 902. Oil - painting brush; 10. Main voltmeter; 11. Main power indicator light; 12. Main power closing light; 13. Main buzzer; 14. Backup voltmeter; 15. Backup power indicator light; 16. Backup power closing light; 17. Backup buzzer. Detailed implementation manners

[0021] In order to make the objectives and advantages of the present invention clearer and more explicit, the present invention will be specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific implementation manners of the present invention, and does not strictly limit the scope of protection specifically claimed for the present invention.

[0022] Embodiment 1: As Figures 1-12 shown, a dual-power switching box includes a box body 1 and a static transfer switch 2, a main air switch 201, and a secondary air switch 202 installed inside the box body 1. The main air switch 201 is used to connect to the commercial power, and the secondary air switch 202 is used to connect to the backup power supply. The static transfer switch 2 is connected in series between the main air switch 201, the secondary air switch 202, and the load. By selectively closing the main air switch 201 or the secondary air switch 202 through a program, with the commercial power supply as the main, once the commercial power fails, the backup power supply is immediately connected.

[0023] The static transfer switch 2 can select an automatic transfer switch of the TOMZN TOQ3-632P model. The intelligent control system monitors the status of the two power supplies (main power supply and backup power supply) in real time. When the main power supply experiences a power outage, overload, unstable voltage, or abnormal frequency, the controller will immediately issue an instruction to switch the actuator (such as a circuit breaker or a relay) to switch the load to the backup power supply within milliseconds. After the main power supply is restored, the system can automatically or manually switch back to the main power supply for power supply, realizing seamless connection of the dual power supplies.

[0024] Among them, in the manual mode of the static transfer switch 2, maintenance personnel can manually turn the knob to switch between the main power supply and the backup power supply. Due to the adoption of the main air switch 201 and the secondary air switch 202, they can automatically trip in case of a short circuit, playing a protective role.

[0025] Referring to the attached Figure 1 and Figure 2 , on the cover of the box body 1, a main voltage meter 10, a main power indicator light 11, a main power closing light 12, a main buzzer 13, a backup voltage meter 14, a backup power indicator light 15, a backup power closing light 16, and a backup buzzer 17 that are electrically connected to the controller are installed at intervals; When the reading of the main voltage meter 10 is greater than 0, it indicates that the main power supply has power; When the reading of the backup voltage meter 14 is greater than 0, it indicates that the backup power supply has power; When the main power indicator light 11 is on, it indicates that the main power supply is online; When the backup power indicator light 15 is on, it indicates that the backup power supply is online; When the main power closing light 12 is on, it indicates that the main power supply is connected and supplies power to the load; When the backup power closing light 16 is on, it indicates that the backup power supply is connected and supplies power to the load; When the main buzzer 13 sounds a harsh sound, it means that the main power supply is faulty or disconnected (it should be connected, but it is not connected); When the standby buzzer 17 sounds a harsh sound, it indicates that the standby power supply fails or is disconnected (it should be connected, but is not connected).

[0026] See attached Figure 1 , Figure 3 and Figure 11 , a flame retardant partition 3 is also installed inside the box 1 by screws. Two flame retardant partitions 3 are arranged side by side to divide the internal space of the box 1 into three unit cavities of the same size. Each unit cavity is penetrated by a threading tube 301 for inserting cables, two half-moon-shaped rubber plugs 302 located at the ends of the threading tube 301, and an inner lining film 303 bonded to the surface of the half-moon-shaped rubber plug 302. When installing, first punch holes in the box 1 and the flame retardant partition 3 to insert the threading tube 301, glue the edges with a waterproof agent, and then fix the static transfer switch 2, the main air switch 201, and the auxiliary air switch 202 with bolts, and then connect the cable, see Figure 11 The arc-shaped notches of two half-moon-shaped rubber plugs 302 are used in conjunction with the inner lining film 303 to bite the cable and are tightly inserted into the end of the threading tube 301 to close it.

[0027] At the same time, the static transfer switch 2, the main air switch 201, and the auxiliary air switch 202 are isolated. If any one of the three generates heat through a short circuit, the heat is blocked in the corresponding unit cavity, which is beneficial to curb the thermal runaway inside the box 1, prevent the fire from spreading, and provide precious rescue time for fire rescue.

[0028] Among them, the inner lining film 303 can be made of either PTFE (Polytetrafluoroethylene) or PET (Polyethylene Terephthalate). When thermal runaway occurs, it expands due to heat and further plugs the threading tube 301 to prevent the flame from spreading to the adjacent unit cavity. In addition, the flame-retardant partition 3, the threading tube 301, and the half-moon rubber plug 302 can all be coated with flame-retardant coating to improve the fireproof performance and avoid spontaneous combustion causing a larger fire.

[0029] In areas with high humidity, inspectors regularly open the box 1 to check the static transfer switch 2, the main air switch 201, the auxiliary air switch 202, or perform routine maintenance. If the unit cavity is not sealed, the three switches are directly exposed to a humid environment, causing the metal components and manual operating knobs to rust due to contact with moisture in the air, which can easily cause leakage, creepage or short circuit, which is not conducive to the internal moisture-proof performance.

[0030] See attached Figure 3 , Figure 7 and Figure 8, to improve the internal moisture-proof performance, in this embodiment, a cover plate 4 is provided at the opening of the unit cavity. The unit cavity is covered with the cover plate 4 made of alloy material for sealing, closing the three switches. When performing maintenance, only the cover plate 4 needs to be opened individually, and only the switch to be repaired needs to be exposed, avoiding all switches being exposed to a humid environment and improving the overall moisture-proof performance; Further, since the cover plate 4 is penetrated by a rubber membrane 5 and a pair of clips 6, when installing the cover plate 4, the two paired clips 6 can be pressed by hand, and swing forward relative to the connection between the two and the rubber membrane 5 to open them for sleeving the threading pipe 301. Moreover, since an elastic cord 7 and a fire extinguisher 8 are provided between the two, after releasing, the elastic cord 7 rebounds and pulls the pair of clips 6 to swing backward. When performing maintenance, the pair of clips 6 clamp the threading pipe 301 to hang the cover plate 4 and cover the unit cavity, thereby blocking external moisture. The threading pipe 301 and the semi-circular rubber plug 302 are deformed to stick to the cable to block external moisture, thereby improving the sealing degree of the unit cavity.

[0031] Among them, the pair of clips 6 is formed by pouring molten plastic or integrally formed with the rubber membrane 5 through 3D printing technology and then glued to the cover plate 4, and the processing is relatively simple.

[0032] Refer to the appendix Figure 7 and Figure 8 , there are four pairs of the pair of clips 6 paired with each cover plate 4, which is not convenient for one-time clamping. Therefore, in this embodiment, a snap fastener 605 is hinged to the end of one pair of clips 6, and a hook 606 is bonded to the end of the other pair of clips 6. When pressing the pair of clips 6, the snap fastener 605 is flipped to hook the hook 606. After releasing, the pair of clips 6 in the open state is locked, so that the hand can be freed to keep the pair of clips 6 in the open state. Thus, when moving the cover plate 4, the pair of clips 6 automatically sleeving the threading pipe 301, and then the snap fastener 605 and the hook 606 are separated one by one. Under the rebounding action of the elastic cord 7, the pair of clips 6 automatically clamps to install the cover plate 4 at one time.

[0033] Refer to the appendix Figure 6 , Figure 7 and Figure 9 , a center ball 503 for limiting the pair of clips 6 and a partition strip 504 connected to the center ball 503 are penetrated through the middle of the rubber membrane 5. The center ball 503 and the partition strip 504 are made of aluminum alloy material. When pressing the pair of clips 6, the pair of clips 6 swings around the center ball 503 and the partition strip 504, as parallel as possible to the three switches to prevent collision, and the center ball 503 can separate the two pairs of clips 6 to maintain a sufficient distance for opening and closing.

[0034] Refer to the appendix Figure 7 , Figure 8 and Figure 11, in order to achieve the rapid closing of the unit cavity, in this embodiment, one end of the pair of clips 6 is provided with an arc-shaped chuck 601 adapted to the threading pipe 301, a friction protrusion 602 installed on the inner side of the arc-shaped chuck 601, and a magnetic ball 603 installed at the end of the arc-shaped chuck 601. The arc-shaped chucks 601 of the two pairs of clips 6 can sleeved the threading pipe 301 from both sides for limiting. When two adjacent magnetic balls 603 attract each other, it drives the arc-shaped chuck 601 and the friction protrusion 602 to squeeze the threading pipe 301. On the one hand, through the friction effect, it realizes firm biting and anti-detachment. On the other hand, it squeezes the threading pipe 301 and the semi-circular rubber plug 302 to closely adhere to the cable. In addition, a limit sleeve 604 for limiting the arc-shaped chuck 601 is sleeved on the outer surface of the threading pipe 301. Both the limit sleeve 604 and the threading pipe 301 can be made of silicone rubber material, which can deform, has good weather resistance and puncture resistance, and is mainly used to prevent the pair of clips 6 from axially shifting along the threading pipe 301; Among them, the friction protrusion 602 is made of granular water-absorbing resin material, which not only has a certain hardness to squeeze the threading pipe 301, but also can be used for emergency moisture absorption when the unit cavity is opened. Once the friction protrusion 602 softens and fails, the entire cover plate 4 can be replaced with a dry friction protrusion 602.

[0035] Refer to the appendix Figure 1 、 Figure 5 and Figure 6 , at the edges of the three unit cavities, there are all welded with a frame 401 for supporting the cover plate 4 and a guide post 403 fixed on the outer surface of the frame 401. The cover plate 4 is provided with glass viewing windows 402 and magnetic rings 404 for attracting the guide posts 403 at intervals. Due to the limitation of the frame 401, it avoids the entire cover plate 4 falling into the unit cavity and hitting the three switches; When the magnetic ring 404 sleeved the guide post 403, it limits the pair of clips 6 to face the threading pipe 301. Also, through the magnetic attraction effect, it can pull the cover plate 4, and cooperate with the sealing ring of the frame 401 to further seal the unit cavity.

[0036] Refer to the appendix Figure 7 and Figure 9 , on the surface of the rubber membrane 5, there is a hollow cage 501 located inside the unit cavity and a desiccant 502 located inside the hollow cage 501. The hollow cage 501 is in a hollow ring shape, bonded to the inner surface of the rubber membrane 5, and surrounds the pair of clips 6 to limit the pair of clips 6. When the unit cavity is closed, the humid air flowing inside passes through the desiccant 502 for moisture absorption, which helps to prevent the three switches from getting damp and rusty.

[0037] Refer to the appendix Figure 8, since the pressing part 607 and the heat-conducting wire 608 that rub against the hand are adhesively bonded to the outside of the clip 6, the hand can be placed on the pressing part 607 made of silicone material, which is relatively soft and has a strong sense of comfort during operation. The heat-conducting wire 608 made of copper alloy partially penetrates into the clip 6 to conduct the heat inside the unit cavity and dissipate it to the external environment through its exposed part, ensuring that the enclosed unit cavity can continuously dissipate heat.

[0038] In terms of heat dissipation, a heat sink fan can also be installed in each unit cavity for independent heat dissipation. The hot air and fresh air are filtered through drying substances such as activated carbon to prevent external moisture from entering the unit cavity.

[0039] Refer to the appendix Figure 1 , Figure 7 and Figure 10 , there is a possibility of short circuit in the three switches, which may then induce thermal runaway. Therefore, in this embodiment, a fire extinguishing agent, hollow glass beads 801 and a traction wire 802 that are interconnected are provided inside the fire extinguisher 8. The hollow glass beads 801 are filled with any one of carbon dioxide, nitrogen, argon, and neon. When thermal runaway occurs, refer to Figure 10 , the traction wire 802 pulls the hollow glass beads 801 to the center, and the hollow glass beads 801 burst due to heat, which is used to break open the fire extinguisher 8. Through the heat-induced bursting of the fire extinguisher 8, the fire extinguishing agent is ejected to contain thermal runaway, and the clip 6 is released, causing the cover plate 4 to automatically fall off and opening for heat dissipation.

[0040] Among them, the fire extinguishing agent can be selected from any one of heptafluoropropane or perfluoropropanone, which can vaporize and absorb heat, expel air, inhibit oxygen, cause no damage to electrical components, and leave no residue after release. The hollow glass beads 801 and the traction wire 802 can be pre-stuck into the glass fire extinguisher 8, then an excessive amount of fire extinguishing agent is poured in, and finally sealed to complete the preparation of the fire extinguisher 8; Then, the fire extinguisher 8 is adhered between two elastic ropes 7 with glue and can be installed on the clip 6 along with the elastic ropes 7.

[0041] Refer to the appendix Figure 1 and Figure 12 , an oil can 9, a sealing cap 901 located at the bottle mouth of the oil can 9, and an oil brush 902 penetrating through the sealing cap 901 are suspended outside the box body 1. During maintenance, the lubricating oil in the oil can 9 is dipped with the oil brush 902 and applied to the static transfer switch 2 to prevent moisture, eliminating the need for maintenance personnel to carry lubricating oil with them. Only the oil can 9 needs to be refilled with lubricating oil regularly.

[0042] The working principle of the present invention is as follows: During operation, the main air switch 201 is used to connect to the mains power supply, and the auxiliary air switch 202 is used to connect to the backup power supply. The main air switch 201 or the auxiliary air switch 202 is selectively closed through a program, with the mains power supply as the main supply. Once a mains power failure occurs, the backup power supply is promptly connected.

[0043] The internal space of the box body 1 is divided into three unit cavities of the same size, sealed by the cover plate 4, separating the static transfer switch 2, the main air switch 201, and the auxiliary air switch 202. If any of the three is short-circuited and generates heat, the heat is blocked within the corresponding unit cavity, which is beneficial to curbing the thermal runaway inside the box body 1, preventing the spread of fire, and providing valuable rescue time for fire rescue.

[0044] During maintenance, the clamp 6 clamps the conduit 301 to hang the cover plate 4 to cover the unit cavity, thereby blocking external moisture. The conduit 301 and the semi-circular rubber plug 302 deform to stick to the cable to block external moisture, thereby improving the tightness of the unit cavity and enclosing the three switches. Then, the cover plate 4 is opened individually, and only the switch to be repaired needs to be exposed, avoiding all switches being exposed to a humid environment and improving the overall moisture-proof performance.

[0045] When pressing the clamp 6, the flip-back buckle 605 hooks the hook 606. After releasing the hand, the clamp 6 in the open state is locked, thus freeing the hand to keep the clamp 6 in the open state. When moving the cover plate 4, the clamp 6 automatically sleeves the conduit 301, and then the flip-back buckle 605 and the hook 606 are separated one by one. Under the elastic return of the elastic rope 7, the clamp 6 automatically clamps to install the cover plate 4 at one time.

[0046] When there is a thermal runaway, the traction wire 802 pulls the hollow glass bead 801 to the center. The hollow glass bead 801 is heated and bursts to break the fire extinguisher 8. Through the bursting of the heated fire extinguisher 8, the fire extinguishing agent is sprayed to curb the thermal runaway, and the clamp 6 is released to make the cover plate 4 fall off automatically and open for heat dissipation.

[0047] Embodiment 2: As Figure 13 shown, a dual-power switching box uses a group of UPS (Uninterruptible Power System) connected to the main power supply, responsible for providing a stable power supply and performing voltage regulation, filtering, etc. on the power supply to protect the load equipment from power fluctuations and interference. The backup power supply can be another group of independent UPS or a backup generator, etc., usually in a standby state. When the main power supply fails, the backup power supply can quickly take over the power supply.

[0048] Among them, the static transfer switch 2 and the UPS are used in combination to provide higher power reliability and redundancy; the UPS is responsible for stabilizing and protecting the power supply, while the static transfer switch 2 is responsible for monitoring and switching the power supply to ensure seamless switching to the backup power supply in case of a main power supply failure and maintaining continuous power supply to the load; this configuration can effectively protect the safety of key equipment and data.

[0049] At the same time, the auxiliary air switch 202 is connected to the power distribution cabinet and can branch out several branches. For example, see Figure 13, with loads such as 10KW, 15KW, 20KW, etc.

[0050] The above are only alternative embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention. The structures, devices, and operation methods not specifically described and explained in the present invention are implemented according to the conventional means in the art without special instructions and limitations.

Claims

1. A dual-power switching box, comprising a box body (1) and a static transfer switch (2) installed inside the box body (1), characterized in that, Inside the box body (1), the following components are also installed: Flame-retardant partitions (3), two of which are arranged side by side to divide the internal space of the box body (1) into three unit cavities, and wiring components for passing cables are penetrated through each unit cavity; Cover plates (4), which are arranged at the openings of the unit cavities. Rubber membranes (5) and pairs of clips (6) are penetrated through the cover plates (4). Two of the pairs of clips (6) are arranged in pairs, and an elastic rope (7) and a fire extinguisher bottle (8) are arranged between them; During maintenance, the pair of clips (6) clamp the wiring component under the pull of the elastic rope (7) to hang the cover plate (4) and cover the unit cavity, thereby blocking external moisture. In case of thermal runaway, the fire extinguisher bottle (8) bursts when heated, spraying fire extinguishing agent to contain the thermal runaway and releasing the pair of clips (6), causing the cover plate (4) to fall off automatically and opening for heat dissipation.

2. A dual-power switching box according to claim 1, characterized in that: The wiring component includes a wire pipe (301) penetrated through the unit cavity, two semi-circular rubber plugs (302) located at the ports of the wire pipe (301), and a lining film (303) arranged on the surfaces of the semi-circular rubber plugs (302); When the pair of clips (6) clamps, the wire pipe (301) and the semi-circular rubber plugs (302) deform and stick to the cable to block external moisture.

3. The double power supply switching box according to claim 2, characterized in that: Frames (401) for supporting the cover plate (4) and guide posts (403) fixed on the outer surfaces of the frames (401) are fixed at the edges of all three unit cavities. Glass viewing windows (402) and magnetic rings (404) for attracting the guide posts (403) are arranged at intervals on the cover plate (4); When the magnetic ring (404) sleeves the guide post (403), the pair of clips (6) is limited and faces the wire pipe (301).

4. A dual-power switching box according to claim 1, characterized in that: A hollow cage (501) located inside the unit cavity and a desiccant (502) located inside the hollow cage (501) are arranged on the surface of the rubber membrane (5). The hollow cage (501) is in a hollow ring shape to limit the pair of clips (6). When humid air circulates inside the unit cavity, the desiccant (502) absorbs moisture.

5. A dual-power switching box according to claim 1, characterized in that: A center ball (503) for limiting the pair of clips (6) and an isolation strip (504) connected to the center ball (503) are penetrated through the middle of the rubber membrane (5). When pressing the pair of clips (6), the pair of clips (6) swings around the center ball (503) and the isolation strip (504).

6. A dual-power switching box according to claim 2, characterized in that: One end of the pair of clips (6) is provided with an arc-shaped clip head (601) adapted to the wire pipe (301), a friction protrusion (602) installed on the inner side of the arc-shaped clip head (601), and a magnetic ball (603) installed at the end of the arc-shaped clip head (601). When two adjacent magnetic balls (603) attract each other, the arc-shaped clip head (601) and the friction protrusion (602) are driven to squeeze the wire pipe (301), and a limit sleeve (604) for limiting the arc-shaped clip head (601) is sleeved on the outer surface of the wire pipe (301); Among them, the friction protrusion (602) is made of granular water-absorbing resin and is used for moisture absorption in the unit cavity.

7. A dual-power switching box according to claim 1, characterized in that: One end of the pair of clips (6) is hinged with a paper clip (605), and the other end of the pair of clips (6) is fixed with a hook (606). When the pair of clips (6) is pressed, the hook (606) is hooked by the paper clip (605) to lock the pair of clips (6) in the open state.

8. A dual-power switching box according to claim 1, characterized in that: The outer side of the pair of clips (6) is fixed with a pressing part (607) for friction with the hand and a heat-conducting wire (608). The heat-conducting wire (608) partially penetrates into the pair of clips (6) and is used for conducting the heat inside the unit cavity and dissipating it to the external environment through its exposed part.

9. A dual-power switching box according to claim 1, characterized in that: Inside the fire extinguisher bottle (8), there are interconnected hollow glass beads (801) and a traction wire (802). The hollow glass beads (801) are filled with any one of carbon dioxide, nitrogen, argon, and neon. When thermal runaway occurs, the hollow glass beads (801) are heated and burst to break the fire extinguisher bottle (8).

10. A dual-power switching box according to claim 1, characterized in that: A lubricating oil can (9), a sealing cap (901) located at the bottle mouth of the lubricating oil can (9), and an oil brush (902) penetrating through the sealing cap (901) are suspended on the outer side of the box body (1). During maintenance, the oil brush (902) is used to dip the lubricating oil in the lubricating oil can (9) and apply it to the static transfer switch (2) for moisture-proofing.

Images