A zero-loss deep current limiting protection device

Abstract

The application discloses a zero-loss deep current-limiting protection device, and relates to the technical field of protection devices.The device comprises a base, a control cabinet is arranged on one side of the top end of the base, a plurality of protection devices are arranged on one side of the control cabinet, and a refrigeration mechanism is arranged in the control cabinet.The refrigeration mechanism comprises a gas feeding pipe, a refrigeration device, an arc-shaped pipe, a flow guide pipe, a guide plate and a partition plate, the refrigeration device is arranged at the bottom end in the control cabinet, and the gas feeding pipe is arranged at the bottom end of the refrigeration device.The protection device comprises a fixing seat, a quick circuit breaker, a cylinder-type converter and a current-limiting reactor, the bottom end of the fixing seat is in contact with the top end of the base, and the quick circuit breaker is fixedly connected to the top end of the fixing seat.The zero-loss deep current-limiting protection device can guarantee the cooling effect, reduce the influence of liquid water on internal elements, and can complete the closing and opening operations in a short time because the vortex disc force direction is coaxial with the moving contact movement direction.

Description

Technical Field

[0001] This invention relates to the field of protection device technology, and in particular to a zero-loss deep current limiting protection device. Background Technology

[0002] As is well known, when a short circuit fault occurs in a power system, the short circuit current is typically more than ten times the rated current. This causes significant damage to electrical equipment such as transformers, generators, circuit breakers, and transmission lines. Currently, the breaking capacity of relatively economical and practical vacuum circuit breakers is below 40kA, and the breaking time is only tens of milliseconds. With the surge in electricity load, the capacity of main transformers has also increased accordingly. The short circuit current faced by the power grid system has approached and reached the maximum operating limit of load vacuum circuit breakers, which will affect the safety of various devices. Zero-loss deep current limiting protection devices can solve the current predicament.

[0003] Currently, zero-loss deep current limiting protection devices on the market typically use fast circuit breakers to perform short-term opening and closing operations. They also increase the impedance of the transformer inside the control cabinet to solve the problems of current limiting and loss. However, simply increasing the impedance does not reduce the electrodynamic force much, and the depth of current limiting is insufficient. It also brings problems such as active and reactive power losses and increased investment costs, resulting in the inability to effectively protect major electrical equipment such as generators and transformers.

[0004] However, existing zero-loss deep current limiting protection devices generate a lot of heat in their internal components during normal operation. The heat accumulation inside the protection device affects the normal operation of the components. Therefore, a cooling mechanism needs to be designed to cool the protection device. However, during the cooling process, when cold air comes into contact with hot air, the gaseous water inside will condense into liquid water and drip onto the components, which poses a certain safety hazard. In addition, the protection device usually uses the internal fast circuit breaker to complete the opening and closing functions, but the opening and closing speed is slow and cannot quickly and accurately solve the current limiting problem, resulting in poor protection effect. Summary of the Invention

[0005] The main objective of this invention is to provide a zero-loss deep current limiting protection device, which can effectively solve the problem that in existing zero-loss deep current limiting protection devices, a large amount of heat is generated by the internal components during normal operation. The heat accumulation inside the protection device affects the normal operation of the components, so a cooling mechanism needs to be designed to cool the protection device. However, during the cooling process, when cold air comes into contact with hot air, the gaseous water inside will condense into liquid water and drip onto the components, which poses a certain safety hazard. In addition, protection devices usually use the internal fast circuit breaker to complete the opening and closing functions, but the opening and closing speed is slow and cannot quickly and accurately solve the current limiting problem, resulting in poor protection effect.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A zero-loss deep current limiting protection device of the present invention includes a base, a control cabinet is provided on one side of the top of the base, a plurality of protection devices are provided on one side of the control cabinet, and a cooling mechanism is provided inside the control cabinet.

[0007] The refrigeration mechanism includes an air supply pipe, a refrigeration device, an arc-shaped pipe, a guide pipe, a guide plate, and a partition plate. The refrigeration device is located at the bottom of the control cabinet, and an air supply pipe is located at the bottom of the refrigeration device. The bottom end of the air supply pipe extends into the interior of the base. An arc-shaped pipe is connected to one side of the air supply pipe. A micro motor is inclinedly arranged on the other side of the bottom of the control cabinet. A rotating blade is provided at the output end of the micro motor. A limit plate is located at the top of the refrigeration device. The limit plate has multiple openings inside, each containing an inverted V-shaped water absorption mesh. A heat absorption layer is located inside the limit plate. A partition plate is located at the top of the limit plate, and a flow groove is located inside the partition plate. A fixing plate is located in the middle of the flow groove. A guide plate is located at the top of the fixing plate, with the top width of the guide plate being greater than its bottom width. A guide pipe is located at the bottom of the flow groove, extending into the interior of the base.

[0008] The protection device includes a fixed base, a fast circuit breaker, a cylindrical converter, and a current-limiting reactor. The bottom end of the fixed base contacts the top end of the base. The fast circuit breaker is fixedly connected to the top end of the fixed base. A sealing plate is provided in the middle of the fast circuit breaker. An upper pull rod is provided in the middle of the sealing plate. A moving contact is provided at the top end of the upper pull rod. Corrugated pipes are symmetrically arranged on both sides of the bottom end of the moving contact. A stationary contact is provided at the top end of the moving contact. A pull rod insulator is provided at the bottom end of the upper pull rod. A pull rod is fixedly connected to the bottom end of the pull rod insulator. An armature is provided on the surface of the pull rod. Two closing holding permanent magnets are symmetrically arranged at the top of the armature, and two opening holding permanent magnets are symmetrically arranged at the bottom of the armature. An opening coil is provided at the bottom of the opening holding permanent magnet. An eddy current disk is provided at the bottom of the opening coil. A closing coil is provided at the bottom of the eddy current disk. A cylindrical converter is provided at the top of the fast circuit breaker, and a current-limiting reactor is provided at the top of the cylindrical converter.

[0009] Preferably, the base has an annular tube inside, a connecting tube is fixedly connected to one side of the annular tube, one end of the connecting tube is connected to the bottom end of the air supply pipe, multiple sets of air inlet pipes are symmetrically arranged at the top of the annular tube, the top of each set of air inlet pipes extends into the interior of the corresponding fixed base, and a C-shaped pipe is provided at the top of each air inlet pipe. Two C-shaped pipes are arranged opposite each other, and a protective cover plate is provided at the top of the two C-shaped pipes. A barrier plate is provided at the top of the protective cover plate, and multiple inclined plates are inclinedly arranged inside the barrier plate.

[0010] Preferably, the bottom of the fixing base is convex, and two water outlet pipes are symmetrically arranged at the bottom of the fixing base. The water outlet pipes have a U-shaped cross-section, and one end of the water outlet pipe extends to the outside of the fixing base.

[0011] Preferably, a plurality of load-bearing plates are vertically arranged on one side of the partition plate, and a cable matching device is provided on one side of the top of the limiting plate. A voltage sensor is provided at the top of each of the two load-bearing plates, a wall-penetrating sleeve is provided in the middle of the partition plate, and a current sensor is provided at the bottom of the wall-penetrating sleeve.

[0012] Preferably, the load-bearing plates are arranged in parallel, and the interior of each load-bearing plate is provided with a plurality of heat dissipation holes at equal intervals, and a mounting hole is provided on one side of each heat dissipation hole.

[0013] Preferably, an opening is provided directly above the top of the arc-shaped tube, and the central axis of the rotating blade intersects the opening after being extended.

[0014] Preferably, the two ends of the water outlet pipe are at different heights, with one end of the water outlet pipe extending into the fixing base being higher than the other end, and the two water outlet pipes are symmetrically arranged along the central axis of the fixing base.

[0015] Preferably, a micro-channel is provided at the bottom end of the annular tube, and the bottom end of the micro-channel coincides with the bottom end of the guide tube.

[0016] Preferably, the housing of the fast circuit breaker is made of ceramic.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. In this invention, through the arrangement of the refrigeration mechanism, an air supply pipe is provided at the bottom of the refrigeration device, and an arc-shaped pipe is connected to one side of the air supply pipe, with the top of the arc-shaped pipe higher than the other end. Thus, when the refrigeration device is working, cold air enters the arc-shaped pipe through the air supply pipe and then exits. During the exit process, some gaseous water is restricted by the shape of the arc-shaped pipe and adheres to the inner wall of the arc-shaped pipe, being transported downwards under the action of gravity. A micro motor is inclinedly arranged on the other side of the bottom of the control cabinet, and a rotating blade is provided at the output end of the micro motor. Since lower-temperature gases are generally at the bottom, the micro motor drives the rotating blade to rotate, which can better transport the cold air upwards. A limit plate is provided at the top of the refrigeration device, and multiple openings are provided inside the limit plate. Each opening is equipped with an inverted V-shaped water absorption net. The limit plate is further equipped with... There is a heat-absorbing layer. Cold air enters the top of the control cabinet through the opening. As the cold air passes through the opening, the gaseous water adheres to the water-absorbing mesh, forming water droplets that then drip down. Under the influence of the cold air, the temperature of the heat-absorbing layer gradually decreases, and it can slowly neutralize the hot air from the outside during subsequent use, improving the utilization rate of the cold air. Furthermore, because a partition plate is set at the top of the limiting plate, and a flow channel is opened inside the partition plate, a fixed plate is set in the middle of the flow channel, and a guide plate is set at the top of the fixed plate. The top width of the guide plate is wider than the bottom width, and a guide pipe is set at the bottom of the flow channel. The cold air is gradually transported upward with the wind force and pressure until it reaches the top of the control cabinet. At this time, the condensed liquid water is sent to the flow channel through the guide plate and then sent out by the guide pipe. This ensures the cooling effect while reducing the impact of liquid water on internal components.

[0019] 2. In this invention, a fast circuit breaker is configured with a sealing plate in the middle, an upper pull rod in the middle of the sealing plate, a moving contact at the top of the upper pull rod, bellows symmetrically arranged on both sides of the bottom of the moving contact, a stationary contact at the top of the moving contact, a pull rod insulator at the bottom of the upper pull rod, a lower pull rod fixedly connected to the bottom of the pull rod insulator, an armature on the surface of the lower pull rod, two closing holding permanent magnets symmetrically arranged at the top of the armature, two opening holding permanent magnets symmetrically arranged at the bottom of the armature, and a opening coil at the bottom of the opening holding permanent magnet. The bottom of the coil is equipped with an eddy current disk, and the bottom of the eddy current disk is equipped with a closing coil. The moving contact, upper pull rod, pull rod insulator, armature, eddy current disk, bellows, and lower pull rod are all moving parts. They are lightweight and move quickly. First, the coil magnetic flux induces a reverse magnetic field in the eddy current disk, forming a repulsive force. This force is then transmitted to the moving contact of the switch through the pull rod, which can quickly complete the closing and opening actions. The direction of the force of the eddy current disk is coaxial with the direction of movement of the moving contact. There is no crank arm or lever. The mechanical transfer function of the drive system is simple and stable, and the action time dispersion is precise. The closing and opening operations can be completed in a short time.

[0020] 3. In this invention, through the arrangement of the annular tube and the baffle plate, the base is equipped with an annular tube, one side of which is fixedly connected to a connecting pipe. One end of the connecting pipe is connected to the bottom end of the air supply pipe. Multiple sets of air inlet pipes are symmetrically arranged at the top of the annular tube. The top of each set of air inlet pipes extends into the interior of the corresponding fixed base, and each air inlet pipe is equipped with a C-shaped pipe at its top. Two C-shaped pipes are arranged opposite each other, and the tops of the two C-shaped pipes are equipped with protective covers. The cold air in the air supply pipe is sent into the air inlet pipe through the annular tube. Then, the two air inlet pipes blow air towards each other. Under the action of the protective covers, the air pressure of the cold air decreases and rises slowly. Since the top of the protective covers is equipped with a baffle plate, and multiple inclined plates are arranged inside the baffle plate, the gaseous water in the cold air rises and adheres to the inclined plates. The cold air continues to be transported upward, and the gaseous water forms liquid water droplets on the inclined plates and then falls out through the water outlet pipe. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of a zero-loss deep current limiting protection device according to the present invention;

[0022] Figure 2 This is a cross-sectional view of the control cabinet in a zero-loss deep current limiting protection device of the present invention;

[0023] Figure 3 This is a three-dimensional structural diagram of the load-bearing plate in a zero-loss depth current limiting protection device of the present invention;

[0024] Figure 4 This is a three-dimensional structural diagram of the partition plate in a zero-loss deep current limiting protection device of the present invention;

[0025] Figure 5 This is a cross-sectional view of the mounting base in a zero-loss depth current limiting protection device of the present invention;

[0026] Figure 6 This is a three-dimensional structural diagram of the barrier plate in a zero-loss depth current limiting protection device of the present invention;

[0027] Figure 7 This is a cross-sectional view of the fast circuit breaker in a zero-loss deep current limiting protection device of the present invention;

[0028] Figure 8 This is a schematic diagram of the structure of a zero-loss deep current limiting protection device according to the present invention;

[0029] Figure 9 This is a circuit diagram of a fast circuit breaker in a zero-loss deep current limiting protection device of the present invention.

[0030] In the diagram: 1. Base; 101. Ring pipe; 102. Connecting pipe; 2. Control cabinet; 201. Cable accessories; 202. Voltage sensor; 203. Through-wall bushing; 204. Current sensor; 3. Fixing base; 301. Barrier plate; 302. C-shaped pipe; 303. Protective cover plate; 304. Water outlet pipe; 305. Air inlet pipe; 306. Inclined plate; 4. Fast circuit breaker; 401. Stationary contact; 402. Moving contact; 403. Corrugated pipe; 404. Sealing plate; 405. Upper pull rod; 406. Pull rod insulator; 407. 408. Pull-down rod; 409. Closing holding permanent magnet; 410. Armature; 411. Opening holding permanent magnet; 412. Opening coil; 413. Eddy current disk; 414. Closing coil; 5. Cylindrical converter; 6. Current limiting reactor; 7. Air supply pipe; 8. Refrigeration unit; 9. Arc-shaped pipe; 10. Guide pipe; 11. Micro motor; 12. Rotating blade; 13. Limiting plate; 131. Heat absorption layer; 132. Opening; 133. Water absorption net; 14. Load-bearing plate; 15. Guide plate; 16. Divider plate; 161. Fixing plate; 162. Flow channel. Detailed Implementation

[0031] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0032] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] Please refer to Figure 1 As shown in Figure 9, this embodiment includes a base 1, a control cabinet 2 is provided on one side of the top of the base 1, a plurality of protective devices are provided on one side of the control cabinet 2, and a refrigeration mechanism is provided inside the control cabinet 2.

[0035] The refrigeration mechanism includes an air supply pipe 7, a refrigeration unit 8, an arc-shaped pipe 9, a guide pipe 10, a guide plate 15, and a partition plate 16. The refrigeration unit 8 is located at the bottom of the control cabinet 2, and the air supply pipe 7 is located at the bottom of the refrigeration unit 8. The bottom end of the air supply pipe 7 extends into the interior of the base 1. An arc-shaped pipe 9 is connected to one side of the air supply pipe 7. When the refrigeration unit 8 is working, cold air enters the arc-shaped pipe 9 through the air supply pipe 7 and is then discharged. During the discharge process, some gaseous water is constrained by the shape of the arc-shaped pipe 9 and adheres to the inner wall of the arc-shaped pipe 9, being transported downwards under gravity. A micro motor 11 is inclinedly installed on the other side of the bottom of the control cabinet 2. A rotating blade 12 is installed at the output end of the micro motor 11. Since low-temperature gases are generally... Below, the micro motor 11 drives the rotating blades 12 to rotate, which can better transport the cold air upward. A limit plate 13 is installed at the top of the refrigeration unit 8. Multiple openings 132 are provided inside the limit plate 13. An opening 132 is located directly above the top of the arc-shaped tube 9, and the extended central axis of the rotating blades 12 intersects with the opening 132. Starting the micro motor 11 can drive the rotating blades 12 to generate thrust, causing the cold air to rise. Each opening 132 is equipped with an inverted V-shaped water-absorbing mesh 133. A heat-absorbing layer 131 is installed inside the limit plate 13. Cold air enters the control cabinet 2 above through the openings 132, and as the cold air passes through the openings 132, gaseous water adheres to the water-absorbing mesh 133, forming water droplets that then drip down. The heat-absorbing layer 131... Under the influence of the air conditioning, the temperature will gradually decrease, and it can slowly neutralize the hot air from the outside during subsequent use, improving the utilization rate of the air conditioning. A partition plate 16 is provided at the top of the limiting plate 13. A flow channel 162 is opened inside the partition plate 16. A fixing plate 161 is provided in the middle of the flow channel 162. A guide plate 15 is provided at the top of the fixing plate 161. The top width of the guide plate 15 is greater than the bottom width. A guide pipe 10 is provided at the bottom of the flow channel 162, and the bottom end of the guide pipe 10 extends into the interior of the base 1. Multiple load-bearing plates 14 are vertically arranged on one side of the partition plate 16. A cable matching device 201 is provided on one side of the top of the limiting plate 13. Voltage sensors 202 are provided at the top of two of the load-bearing plates 14. A wall-penetrating sleeve 203 is provided in the middle of the partition 16, and a current sensor 204 is provided at the bottom of the wall-penetrating sleeve 203. Multiple load-bearing plates 14 are arranged in parallel, and multiple heat dissipation holes are opened at equal intervals inside the load-bearing plates 14. An installation hole is provided on one side of the heat dissipation hole. The cold air is gradually transported upward through the heat dissipation holes by wind force and pressure until it reaches the top of the control cabinet 2. At this time, the condensed liquid water will be sent to the flow channel 162 through the guide plate 15, and then sent out by the guide pipe 10. This ensures the cooling effect while reducing the impact of liquid water on internal components. The use of the current sensor 204, voltage sensor 202 and cable matching device 201 can ensure the integrity of the internal circuit of the protection device and provide a certain degree of safety guarantee.

[0036] The protection device includes a fixed base 3, a fast circuit breaker 4, a cylindrical converter 5, and a current-limiting reactor 6. The bottom end of the fixed base 3 contacts the top end of the base 1. The bottom interior of the fixed base 3 is convex, and two water outlet pipes 304 are symmetrically arranged on the bottom interior of the fixed base 3. The cross-section of the water outlet pipes 304 is U-shaped, and one end of the water outlet pipes 304 extends to the outside of the fixed base 3. The two ends of the water outlet pipes 304 are at different heights, with the end of the water outlet pipe 304 extending into the fixed base 3 being higher than the other end. The two water outlet pipes 304 are symmetrically arranged along the central axis of the fixed base 3. The U-shaped water outlet pipes 304 help to drain the water inside the fixed base 3. The top end of the fixed base 3 is fixedly connected to the fast circuit breaker 4. The casing of circuit breaker 4 is made of ceramic. A sealing plate 404 is located in the middle of the fast circuit breaker 4. An upper pull rod 405 is located in the middle of the sealing plate 404. A moving contact 402 is located at the top of the upper pull rod 405. Corrugated pipes 403 are symmetrically arranged on both sides of the bottom end of the moving contact 402. A stationary contact 401 is located at the top of the moving contact 402. A pull rod insulator 406 is located at the bottom of the upper pull rod 405. A lower pull rod 407 is fixedly connected to the bottom end of the pull rod insulator 406. An armature 409 is located on the surface of the lower pull rod 407. Two closing holding permanent magnets 408 are symmetrically arranged at the top of the armature 409, and two opening holding permanent magnets 410 are symmetrically arranged at the bottom of the armature 409. A tripping coil 411 is located at the bottom of the permanent magnet 410, an eddy current disk 412 is located at the bottom of the tripping coil 411, and a closing coil 413 is located at the bottom of the eddy current disk 412. The moving contact 402, upper pull rod 405, pull rod insulator 406, armature 409, eddy current disk 412, bellows 403, and lower pull rod 407 are all moving parts. They are lightweight and move quickly. First, the coil magnetic flux induces a reverse magnetic field in the eddy current disk 412, forming a repulsive force. This force is transmitted through the lower pull rod 407 to the pull rod insulator 406, causing the upper pull rod 405 to move upwards, thereby causing the moving contact 402 to rise. This allows for rapid completion of the closing and tripping actions. The direction of the force exerted by the eddy current disk 412 is... The moving contact 402 moves in the same direction, without any levers or cranks. The mechanical transfer function of the drive system is simple and stable, and the action time dispersion is precise. The closing control requires a closing energy storage capacitor, and the opening control requires a opening energy storage capacitor. The energy storage capacitor discharges the two coils of closing and opening. The driving force is proportional to the energy stored in the capacitor. The capacitor energy storage method can output a large discharge current, allowing the switch to open within 5ms. Furthermore, the closing and opening operations are controlled by a thyristor, which results in a faster response to relay protection commands and can complete the closing and opening operations in a short time. A cylindrical converter 5 is installed at the top of the fast circuit breaker 4, and a current-limiting reactor 6 is installed at the top of the cylindrical converter 5.

[0037] The base 1 has an annular tube 101 inside, and a micro-pipe is provided at the bottom end of the annular tube 101. The bottom end of the micro-pipe coincides with the bottom end of the guide tube 10. A connecting tube 102 is fixedly connected to one side of the annular tube 101. One end of the connecting tube 102 is connected to the bottom end of the air supply tube 7. Multiple sets of air inlet pipes 305 are symmetrically arranged at the top end of the annular tube 101. The top end of each set of air inlet pipes 305 extends into the interior of the corresponding fixed base 3, and a C-shaped pipe 302 is provided at the top end of each air inlet pipe 305. Two C-shaped pipes 302 are arranged opposite each other, and a protective cover plate 303 is provided at the top end of each C-shaped pipe 302. A baffle plate 301 is provided at the top end of the protective cover plate 303. Multiple inclined plates are inclinedly arranged inside the baffle plate 301. 306. Two C-shaped pipes 302 are arranged opposite each other, and the top of the two C-shaped pipes 302 is provided with a protective cover plate 303. The cold air in the air supply pipe 7 is sent into the air inlet pipe 305 through the annular pipe 101. Then the two air inlet pipes 305 blow air towards each other. Under the action of the protective cover plate 303, the air pressure of the cold air becomes smaller and rises slowly. Since the top of the protective cover plate 303 is provided with a baffle plate 301, and multiple inclined plates 306 are arranged inside the baffle plate 301, the gaseous water in the cold air rises and adheres to the inclined plates 306. The cold air continues to be transported upward, and the gaseous water forms liquid water droplets on the inclined plates 306 and then falls out through the water outlet pipe 304, thus ensuring that the liquid water does not affect the internal components of the protection device.

[0038] The working principle of this invention is as follows: After installing the protection device and control cabinet 2, during closing, a reverse magnetic field is induced in the eddy current disk 412 through the coil magnetic flux, forming a repulsive force. This force is transmitted to the pull rod insulator 406 through the pull rod 407, causing the pull rod 405 to move upward, thereby causing the moving contact 402 to rise. This allows for rapid closing. Opening is achieved simply by canceling the coil magnetic flux. The force direction of the eddy current disk 412 is coaxial with the movement direction of the moving contact 402. There is no crank arm or lever, resulting in a simple and stable mechanical transfer function for the drive system, precise action time dispersion, and the use of a closing energy storage capacitor for both closing and opening control. The energy storage capacitor discharges to both the closing and opening coils, and the driving force intensity is proportional to the energy stored in the capacitor. The energy storage method can output a large discharge current, enabling the switch to trip within 5ms and start the cooling device 8 and micro motor 11. Some of the cold air enters the upper part of the control cabinet 2 through the opening 132. When the cold air passes through the opening 132, the gaseous water adheres to the water absorption net 133, forming water droplets that then drip down. Under the influence of the cold air, the temperature of the heat absorption layer 131 gradually decreases, and it can slowly neutralize the hot air from the outside during subsequent use. Another part of the cold air is sent into the air inlet pipe 305 through the annular pipe 101. The gaseous water in the cold air rises and adheres to the inclined plate 306. The cold air continues to be transported upward, and the gaseous water forms liquid water droplets on the inclined plate 306 and then drips down, and is then discharged through the water outlet pipe 304, thus ensuring that the liquid water does not affect the internal components of the protection device.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A zero-loss depth current limiting protection device, characterized in that: Includes a base (1), a control cabinet (2) is provided on one side of the top of the base (1), a plurality of protective devices are provided on one side of the control cabinet (2), and a refrigeration mechanism is provided inside the control cabinet (2); The refrigeration mechanism includes an air supply pipe (7), a refrigeration device (8), an arc-shaped pipe (9), a guide pipe (10), a guide plate (15), and a partition plate (16). The refrigeration device (8) is located at the bottom of the control cabinet (2). The air supply pipe (7) is located at the bottom of the refrigeration device (8). The bottom of the air supply pipe (7) extends into the interior of the base (1). An arc-shaped pipe (9) is connected to one side of the air supply pipe (7). A micro motor (11) is inclinedly arranged on the other side of the bottom of the control cabinet (2). A rotating blade (12) is provided at the output end of the micro motor (11). A limit plate (13) is provided at the top of the refrigeration device (8). The interior has multiple openings (132), and each opening (132) is provided with an inverted V-shaped water absorption net (133). The interior of the limiting plate (13) is provided with a heat absorption layer (131). The top of the limiting plate (13) is provided with a partition plate (16). The interior of the partition plate (16) is provided with a flow groove (162). The middle of the flow groove (162) is provided with a fixing plate (161). The top of the fixing plate (161) is provided with a guide plate (15). The top width of the guide plate (15) is greater than the bottom width. The bottom of the flow groove (162) is provided with a guide pipe (10). The bottom of the guide pipe (10) extends into the interior of the base (1). The protection device includes a fixed base (3), a fast circuit breaker (4), a cylindrical converter (5), and a current-limiting reactor (6). The bottom end of the fixed base (3) is in contact with the top end of the base (1). The fast circuit breaker (4) is fixedly connected to the top end of the fixed base (3). A sealing plate (404) is provided in the middle of the fast circuit breaker (4). An upper pull rod (405) is provided in the middle of the sealing plate (404). A moving contact (402) is provided at the top end of the upper pull rod (405). Corrugated pipes (403) are symmetrically arranged on both sides of the bottom end of the moving contact (402). A stationary contact (401) is provided at the top end of the moving contact (402). A pull rod insulator (406) is provided at the bottom end of the upper pull rod (405). A pull rod (407) is fixedly connected to the bottom end of the pull rod insulator (406). An armature (409) is provided on the surface of the pull rod (407). Two closing holding permanent magnets (408) are symmetrically arranged at the top of the armature (409). Two opening holding permanent magnets (410) are symmetrically arranged at the bottom of the armature (409). An opening coil (411) is provided at the bottom of the opening holding permanent magnet (410). An eddy current disk (412) is provided at the bottom of the opening coil (411). A closing coil (413) is provided at the bottom of the eddy current disk (412). A cylindrical converter (5) is provided at the top of the fast circuit breaker (4). A current-limiting reactor (6) is provided at the top of the cylindrical converter (5).

2. The zero-loss deep current limiting protection device according to claim 1, characterized in that: The base (1) is provided with an annular tube (101) inside. A connecting tube (102) is fixedly connected to one side of the annular tube (101). One end of the connecting tube (102) is connected to the bottom end of the air supply tube (7). Multiple sets of air inlet tubes (305) are symmetrically arranged at the top of the annular tube (101). The top of each set of air inlet tubes (305) extends into the interior of the corresponding fixed seat (3). The top of each air inlet tube (305) is provided with a C-shaped tube (302). Two C-shaped tubes (302) are arranged opposite each other. The top of the two C-shaped tubes (302) is provided with a protective cover plate (303). The top of the protective cover plate (303) is provided with a barrier plate (301). Multiple inclined plates (306) are inclined inside the barrier plate (301).

3. The zero-loss deep current limiting protection device according to claim 2, characterized in that: The bottom of the fixed base (3) is protruding, and two water outlet pipes (304) are symmetrically arranged at the bottom of the fixed base (3). The cross-section of the water outlet pipe (304) is U-shaped, and one end of the water outlet pipe (304) extends to the outside of the fixed base (3).

4. The zero-loss deep current limiting protection device according to claim 3, characterized in that: Multiple load-bearing plates (14) are vertically arranged on one side of the partition plate (16), and a cable matching device (201) is provided on one side of the top of the limiting plate (13). A voltage sensor (202) is provided at the top of each of the two load-bearing plates (14), and a wall sleeve (203) is provided in the middle of the partition plate (16). A current sensor (204) is provided at the bottom of the wall sleeve (203).

5. A zero-loss depth current limiting protection device according to claim 4, characterized in that: Multiple load-bearing plates (14) are arranged in parallel, and multiple heat dissipation holes are provided inside the load-bearing plates (14) at equal intervals, and a mounting hole is provided on one side of each heat dissipation hole.

6. A zero-loss depth current limiting protection device according to claim 5, characterized in that: An opening (132) is provided directly above the top of the arc-shaped tube (9), and the central axis of the rotating blade (12) intersects the opening (132) after being extended.

7. A zero-loss depth current limiting protection device according to claim 6, characterized in that: The two ends of the water outlet pipe (304) are at different heights. One end of the water outlet pipe (304) extending into the fixed base (3) is higher than the other end, and the two water outlet pipes (304) are symmetrically arranged along the central axis of the fixed base (3).

8. A zero-loss depth current limiting protection device according to claim 7, characterized in that: The bottom end of the annular tube (101) is provided with a micro-channel, and the bottom end of the micro-channel coincides with the bottom end of the guide tube (10).

9. A zero-loss depth current limiting protection device according to claim 8, characterized in that: The casing of the fast circuit breaker (4) is made of ceramic.

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