Intelligent cable branch box

Abstract

The invention discloses an intelligent cable branch box which comprises a cable branch box body and further comprises a top cover fixedly installed on the outer wall of the top end of the cable branch box body; the fire extinguishing mechanism is fixedly mounted on the top cover; the plurality of exhaust ports are arranged on the inner wall of one side of the cable branch box body in a penetrating manner, and the plurality of exhaust ports are arranged close to the upper part; the two air inlets are symmetrically formed in the inner walls of the two sides of the cable branch box body in a penetrating mode, the two air inlets are arranged close to the lower portion, and a plurality of grids are fixedly connected into each air inlet; the cleaning mechanism is respectively connected with the two air inlets; the two first sliding grooves are symmetrically formed in the inner walls of the two sides of the cable branch box body, and the inner wall of each first sliding groove is fixedly communicated with a second sliding groove; and the two baffles are movably connected into the two sliding grooves I. The intelligent cable branch box disclosed by the invention has the effects of realizing a self-adaptive heat dissipation function, reducing the use energy consumption and keeping a proper temperature in the cable branch box body.

Description

Technical Field

[0001] This invention relates to the field of cable branch box technology, and more particularly to an intelligent cable branch box. Background Technology

[0002] In power systems, cable distribution boxes serve as critical nodes in the distribution network, and their internal temperature and operational stability directly impact the reliability of the entire power grid. With accelerated urbanization and increasing industrial electricity demand, power distribution equipment operates under high loads for extended periods, making internal temperature control a core issue for ensuring equipment lifespan and safety.

[0003] Traditional heat dissipation solutions mostly rely on fixed fans for forced cooling, which has drawbacks such as high energy consumption and poor environmental adaptability. Furthermore, power distribution equipment commonly faces safety hazards such as condensation and overheating, and existing technologies struggle to achieve intelligent control under dynamic environments. Therefore, developing a low-energy-consumption, highly adaptable cable distribution box with intelligent temperature management capabilities has become a pressing technical challenge for the power industry. Summary of the Invention

[0004] This invention discloses an intelligent cable branch box, aiming to solve the technical problem of how to develop a cable branch box with low energy consumption, high adaptability and intelligent temperature management function.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An intelligent cable distribution box includes a cable distribution box body, and further includes: a top cover, fixedly installed on the top outer wall of the cable distribution box body; a fire extinguishing mechanism, fixedly installed on the top cover; multiple exhaust ports, penetrating one inner wall of the cable distribution box body, with the multiple exhaust ports positioned at the top; two air inlets, symmetrically penetrating both inner walls of the cable distribution box body, with the two air inlets positioned at the bottom, each air inlet having multiple grilles fixedly connected inside; a cleaning mechanism, respectively connected to the two air inlets; and two sliding grooves, symmetrically arranged on both sides of the cable distribution box body. The inner wall of each slide 1 is fixedly connected to slide 2; two baffles are movably connected to the two slide 1s respectively, and a horizontal plate is fixedly connected to the inner wall of each baffle, and the two horizontal plates are movably connected to the two slide 2s respectively; two air rods are fixedly connected to the inner walls of both sides of the cable branch box body respectively, and the output ends of the two air rods are fixedly connected to the top outer wall of the horizontal plate respectively; a temperature sensor is fixedly installed on the inner wall of one side of the cable branch box body; a guide fan is fixedly embedded in the inner wall of one side of the cable branch box body and is symmetrically arranged with multiple exhaust ports; Each of the exhaust ports has a filter screen embedded on one side of its inner wall. The bottom of the cable branch box body is fixedly connected to a base. Limiting frames are fixedly connected to the inner walls of both sides of the cable branch box body, and the air rod is fixedly installed on the limiting frames. The top of the horizontal plate is fixedly connected to a limiting rod, which is movably inserted into the limiting frame. The bottom ends of the two baffles are respectively fixedly connected to sealing strips, which are movably attached to the inner walls of the bottom ends of the two air inlets.

[0006] During daily use, the temperature sensor can measure the temperature inside the cable distribution box in real time. In low-temperature environments, the air spring can be controlled to push the baffle down, reducing or eliminating the air intake to stabilize the internal temperature of the cable distribution box and prevent condensation caused by excessively low internal temperatures. In medium-temperature environments, the air inlet and outlet can form a circulation channel to meet daily heat dissipation needs. In high-temperature environments, the guide fan can be controlled to turn on simultaneously to accelerate airflow and greatly improve heat dissipation efficiency. Thus, an adaptive heat dissipation function can be achieved. Compared with existing fan cooling, it can effectively reduce energy consumption and better adapt to ambient temperature, effectively maintaining a suitable temperature inside the cable distribution box.

[0007] In a preferred embodiment, the fire extinguishing mechanism includes: a high-pressure gas storage chamber, which is fixedly installed on the top outer wall of the top cover by multiple mounting brackets; and a gas supply pipe, which is fixedly connected to the bottom inner wall of the high-pressure gas storage chamber. The fire extinguishing mechanism also includes: a temperature-sensing glass bulb, which is fixedly blocked inside the gas supply pipe; and multiple temperature-conducting ribs, which are equidistantly fixedly connected to the outer circumference of the gas supply pipe, and the multiple temperature-conducting ribs are bent downwards. The fire extinguishing mechanism further includes: a diversion pipe, which is fixedly connected to the inner walls of both sides of the gas supply pipe; multiple powder storage tanks, which are fixedly connected to the inner wall of the bottom end of the diversion pipe at equal intervals, and each powder storage tank is filled with ultrafine dry powder; and multiple sealing diaphragms, which are fixedly sealed to the output ends of the multiple powder storage tanks.

[0008] Equipped with a fire extinguishing mechanism, when the fire temperature rises sharply, the temperature-sensing glass bulb ruptures rapidly, and the gas inside the high-pressure gas storage chamber is quickly ejected, causing the sealing diaphragm at the bottom of each powder storage tank to rupture. At this time, the ultrafine dry powder inside the powder storage tank is quickly sprayed downwards to achieve the purpose of fire extinguishing, effectively suppressing the spread of fire and providing protection.

[0009] In a preferred embodiment, the cleaning mechanism includes: two inclined guide plates, symmetrically fixedly connected to the inner walls of opposite sides of the cable branch box body, with their top ends fixedly attached to the bottom end of the air inlet; and two through slots, symmetrically arranged on the inner wall of the base, with the two ends of the through slots penetrating the top end and one side of the base, respectively. The cleaning mechanism further includes: two baffles, which are fixedly connected to the bottom inner wall of the cable branch box body; and two water guide plates, which are symmetrically fixedly connected to the two outer walls of the cable branch box body and respectively attached to the bottom of the two air inlets. The cleaning mechanism further includes: multiple leakage micro-holes, which are disposed through the bottom inner wall of each water guide plate; and two slots, which are respectively disposed on one side inner wall of each water guide plate. The cleaning mechanism further includes: two inserts, each interference-fitted into two slots; and an extension plate, fixedly connected to one outer wall of the two inserts.

[0010] With a cleaning mechanism, the outdoor cable distribution box allows rainwater to be guided by a water guide plate and washed away by the attached dust on the air inlet and the inner wall of the grille. The dust then flows into the interior of the cable distribution box with the water flow, and is guided by the baffle plate to flow into the channel and out of the cable distribution box. This completes the automatic cleaning of the air inlet and grille, ensuring smooth air intake every day.

[0011] As described above, an intelligent cable distribution box includes a cable distribution box body, and further includes: a top cover, fixedly installed on the top outer wall of the cable distribution box body; a fire extinguishing mechanism, fixedly installed on the top cover; multiple exhaust ports, penetrating one inner wall of the cable distribution box body, with the multiple exhaust ports positioned at the top; two air inlets, symmetrically penetrating the inner walls of both sides of the cable distribution box body, with the two air inlets positioned at the bottom, and each air inlet having multiple grilles fixedly connected inside; a cleaning mechanism, respectively connected to the two air inlets; and two sliding grooves, symmetrically arranged on the cable distribution box body. The cable branch box has two inner walls on both sides, and each inner wall of the first slide is fixedly connected to a second slide; two baffles are movably connected to the two first slides, and the inner wall of each baffle is fixedly connected to a horizontal plate, which is movably connected to the two second slides; two air rods are fixedly connected to the inner walls on both sides of the cable branch box body, and the output ends of the two air rods are fixedly connected to the top outer wall of the horizontal plate; a temperature sensor is fixedly installed on one inner wall of the cable branch box body; and a guide fan is fixedly embedded in one inner wall of the cable branch box body and is symmetrically arranged with multiple exhaust ports. The intelligent cable branch box provided by this invention has the technical effect of achieving adaptive heat dissipation, reducing energy consumption while maintaining a suitable temperature inside the cable branch box body. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of an intelligent cable branch box proposed in this invention.

[0013] Figure 2 This is a schematic diagram of the internal structure of an intelligent cable branch box proposed in this invention.

[0014] Figure 3 This is a schematic diagram showing the disassembled air inlet adjustment structure of an intelligent cable branch box proposed in this invention.

[0015] Figure 4This is a schematic diagram showing the disassembled cleaning mechanism of an intelligent cable branch box proposed in this invention.

[0016] Figure 5 This is a schematic diagram showing the disassembled fire extinguishing mechanism of an intelligent cable branch box proposed in this invention.

[0017] In the diagram: 1. Cable branch box body; 2. Exhaust port; 3. Filter screen one; 4. Top cover; 5. Fire extinguishing mechanism; 6. Base; 7. Cleaning mechanism; 8. Air inlet; 9. Grille; 10. Limiting bracket; 11. Baffle; 12. Slide groove one; 13. Slide groove two; 14. Sealing strip; 15. Horizontal plate; 16. Limiting rod; 17. Gas rod; 18. Guide fan; 19. Temperature sensor; 501. Mounting bracket; 502. High-pressure gas storage chamber; 503. Diverter pipe; 504. Powder storage tank; 505. Temperature-sensing glass bulb; 506. Sealing diaphragm; 507. Temperature-conducting rib; 508. Gas delivery pipe; 701. Inclined guide plate; 702. Baffle plate; 703. Through groove; 704. Water guide plate; 705. Extension plate; 706. Socket; 707. Slot; 708. Leakage micropore. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] The intelligent cable branch box disclosed in this invention is mainly used in scenarios where cable branch boxes are used.

[0020] Reference Figures 1-3 An intelligent cable distribution box includes a cable distribution box body 1, an exhaust port 2, a top cover 4, a fire extinguishing mechanism 5, a cleaning mechanism 7, an air inlet 8, a grille 9, a baffle 11, a slide 12, an air rod 17, a guide fan 18, and a temperature sensor 19. The top cover 4 is fixedly installed on the top outer wall of the cable distribution box body 1; the fire extinguishing mechanism 5 is fixedly installed on the top cover 4; and the cleaning mechanism 7 is connected to two air inlets 8 respectively.

[0021] Multiple exhaust ports 2 are installed through one inner wall of the cable branch box body 1, and the multiple exhaust ports 2 are located at the top; each inner wall of one side of the exhaust port 2 is inlaid with a filter screen 3, and the filter screen 3 can prevent external garbage from entering the cable branch box body 1 through the exhaust port 2; a base 6 is fixedly connected to the bottom of the cable branch box body 1, and limit frames 10 are fixedly connected to the inner walls of both sides of the cable branch box body 1, and the air rod 17 is fixedly installed on the limit frame 10.

[0022] Two air inlets 8 are symmetrically arranged through the inner walls of both sides of the cable branch box body 1, with the two air inlets 8 positioned at the bottom. Multiple grilles 9 are fixedly connected to each air inlet 8. Two slide grooves 12 are symmetrically arranged on the inner walls of both sides of the cable branch box body 1, and slide grooves 13 are fixedly connected to the inner walls of each slide groove 12. Two baffles 11 are movably connected to the two slide grooves 12, and a horizontal plate 15 is fixedly connected to the inner wall of each baffle 11. The two horizontal plates 15 are movably connected to the two slide grooves 13. Two air rods 17 are fixedly connected to the inner walls of both sides of the cable branch box body 1, and the output ends of the two air rods 17 are fixedly connected to the top outer wall of the horizontal plate 15. A guide fan 18 is fixedly embedded in the inner wall of one side of the cable branch box body 1 and is symmetrically arranged with multiple exhaust ports 2. A temperature sensor 19 is fixedly installed on the inner wall of one side of the cable branch box body 1.

[0023] Reference Figure 3 In a preferred embodiment, a limiting rod 16 is fixedly connected to the top of the horizontal plate 15, and the limiting rod 16 is movably inserted into the limiting frame 10; the setting of the limiting rod 16 can ensure the stability of the baffle 11 during the lifting process; the bottom ends of the two baffles 11 are respectively fixedly connected to sealing strips 14, and the sealing strips 14 are movably attached to the bottom inner wall of the two air inlets 8; the setting of the sealing strips 14 can ensure the sealing performance of the baffles 11 after they are pressed down.

[0024] Internal heat dissipation is achieved by forming an air circulation channel through the air inlet 8 located near the bottom and the exhaust port 2 located near the top, along with the guide fan 18. During daily use, the temperature inside the cable branch box 1 can be measured in real time by the temperature sensor 19, and three temperature range thresholds (low, medium, and high) can be set. In low-temperature environments, the air rod 17 can be activated, extending its output end to push the baffle 11 downward, reducing the space of the air inlet 8 or closing it directly. By reducing or eliminating the intake, the internal temperature of the cable branch box 1 can be stabilized, preventing condensation caused by excessively low internal temperatures. In medium-temperature environments, the air inlet 8 can be fully opened, forming a circulation channel with the exhaust port 2 to meet daily heat dissipation needs without the use of electricity. In high-temperature environments, the guide fan 18 can be activated simultaneously, accelerating airflow and greatly improving heat dissipation efficiency. Thus, an adaptive heat dissipation function can be achieved, which can effectively reduce energy consumption compared to existing fan-based heat dissipation, while also better adapting to ambient temperatures and effectively maintaining a suitable temperature inside the cable branch box 1.

[0025] Reference Figure 3 and Figure 4In a preferred embodiment, the cleaning mechanism 7 includes inclined guide plates 701, baffle plates 702, through slots 703, and water guide plates 704. Two inclined guide plates 701 are symmetrically fixedly connected to the inner walls of opposite sides of the cable branch box body 1, with their top ends fixedly attached to the bottom end of the air inlet 8. Two through slots 703 are symmetrically arranged on the inner wall of the base 6, with both ends of the through slots 703 penetrating through the top end and one side of the base 6, respectively. Two baffle plates 702 are respectively fixedly connected to the inner wall of the bottom end of the cable branch box body 1; two water guide plates 704 are symmetrically fixedly connected to the outer walls of both sides of the cable branch box body 1, and respectively attached to the bottom ends of the two air inlets 8.

[0026] With prolonged use, especially when used outdoors, dust easily accumulates on the inner walls of the air inlet 8 and the grille 9, affecting air intake efficiency. Due to the structure of the grille 9 inside the air inlet 8, manual cleaning is also difficult. With the cleaning mechanism 7, when it rains, rainwater from the outdoor cable distribution box can be guided by the water guide plate 704 to wash away the dust adhering to the inner walls of the air inlet 8 and the grille 9. The dust enters the interior of the cable distribution box body 1 with the water flow, and flows into the through groove 703 under the guidance of the baffle plate 702 and is discharged from the cable distribution box body 1. This completes the automatic cleaning of the air inlet 8 and the grille 9, ensuring smooth daily air intake.

[0027] Reference Figure 4 In a preferred embodiment, the cleaning mechanism 7 further includes an extension plate 705, a bracket 706, a slot 707, and a leakage micro-hole 708; a plurality of leakage micro-holes 708 are disposed through the bottom inner wall of each water guide plate 704; two slots 707 are respectively disposed on one side inner wall of each water guide plate 704; two brackets 706 are respectively interference-fitted into the two slots 707; and the extension plate 705 is fixedly connected to one side outer wall of the two brackets 706.

[0028] During heavy rain, the controllable baffle 11 can fall and block the air inlet, preventing excessive rainfall from entering the cable branch box body 1. Based on the multiple leakage micro-holes 708 on the water guide plate 704, rainwater accumulated at the bottom of the water guide plate 704 can slowly drain out, preventing long-term rainwater accumulation and corrosion. The extension plate 705 expands the rain-receiving area, optimizing rainwater utilization. Furthermore, since the extension plate 705 is connected via a connector 706, its use can be selected based on actual needs, offering high adaptability.

[0029] Reference Figure 5In a preferred embodiment, the fire extinguishing mechanism 5 includes a mounting bracket 501, a high-pressure gas storage chamber 502, a diversion pipe 503, a powder storage tank 504, a temperature-sensing glass bulb 505, a sealing diaphragm 506, a temperature-conducting rib 507, and a gas delivery pipe 508; the high-pressure gas storage chamber 502 is fixedly mounted to the top outer wall of the top cover 4 via multiple mounting brackets 501; the diversion pipe 503 is fixedly connected to the inner walls of both sides of the gas delivery pipe 508; and multiple powder storage tanks 504 are equidistantly fixedly connected to the inner walls of the gas delivery pipe 508. The bottom inner wall of the diversion pipe 503 is filled with ultrafine dry powder in each powder storage tank 504; the temperature-sensing glass ball 505 is fixedly blocked inside the gas transmission pipe 508; multiple sealing diaphragms 506 are fixedly blocked at the output ends of multiple powder storage tanks 504 respectively; multiple temperature-conducting ribs 507 are equidistantly fixedly connected to the outer circumference of the gas transmission pipe 508, and the multiple temperature-conducting ribs 507 are bent downwards; the gas transmission pipe 508 is fixedly connected to the bottom inner wall of the high-pressure gas storage chamber 502.

[0030] Based on the function of multiple heat-conducting ribs 507, a heat conduction path is established between the gas pipe 508 and the internal temperature of the cable branch box body 1 by extending downwards, which can accelerate the temperature sensing rate of the temperature-sensing glass ball 505 and shorten the response time.

[0031] In the fire extinguishing mechanism 5, the internal temperature of the cable branch box body 1 is sensed by the heat-sensing glass bulb 505. When the fire temperature rises sharply and reaches the rupture threshold of the heat-sensing glass bulb 505, the heat-sensing glass bulb 505 ruptures rapidly, and the gas inside the high-pressure gas storage chamber 502 is rapidly ejected. The gas is then diverted through the diversion pipe 503 and enters multiple powder storage tanks 504. By pressurizing, the sealing diaphragm 506 at the bottom of each powder storage tank 504 ruptures. At this time, the ultrafine dry powder in the powder storage tank 504 is rapidly ejected downwards to achieve the purpose of fire extinguishing and effectively suppress the spread of fire.

[0032] Working principle: Air is introduced through the air inlet 8 located near the bottom and exhausted through the exhaust port 2 located near the top, along with the guide fan 18, forming an air circulation channel to achieve internal heat dissipation. During daily use, the temperature sensor 19 can measure the temperature inside the cable branch box 1 in real time and set thresholds for three temperature ranges: low, medium, and high. In low-temperature environments, the air rod 17 can be activated, extending its output end to push the baffle 11 downward, reducing the space of the air inlet 8 or closing it directly. By reducing or eliminating the intake, the internal temperature of the cable branch box 1 is stabilized, preventing condensation caused by excessively low internal temperatures. In medium-temperature environments, the air inlet 8 can be fully opened, forming a circulation channel with the exhaust port 2 to meet daily heat dissipation needs without the use of electricity. In high-temperature environments, the guide fan 18 can be activated simultaneously, accelerating airflow and greatly improving heat dissipation efficiency. Thus, an adaptive heat dissipation function is achieved, which can effectively reduce energy consumption compared to existing fan-based heat dissipation, while also better adapting to ambient temperatures and effectively maintaining a suitable temperature inside the cable branch box 1.

[0033] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An intelligent cable branch box, comprising a cable branch box body (1), characterized in that, Also includes: Top cover (4) is fixedly installed on the top outer wall of the cable branch box body (1); The fire extinguishing mechanism (5) is fixedly installed on the top cover (4); Multiple exhaust ports (2) are installed through the inner wall of one side of the cable branch box body (1), and the multiple exhaust ports (2) are installed at the top; Two air inlets (8) are symmetrically arranged through the inner walls of the cable branch box body (1) on both sides, and the two air inlets (8) are arranged at the bottom. Each air inlet (8) is fixedly connected with multiple grilles (9). The cleaning mechanism (7) is connected to two air inlets (8) respectively; Two slide grooves (12) are symmetrically arranged on the inner walls of the two sides of the cable branch box body (1), and each slide groove (12) is fixedly connected to a slide groove (13) on its inner wall. Two baffles (11) are movably connected to two slide grooves (12), and each baffle (11) has a horizontal plate (15) fixedly connected to its inner wall. The two horizontal plates (15) are movably connected to two slide grooves (13). Two air rods (17) are fixedly connected to the inner walls of the two sides of the cable branch box body (1), and the output ends of the two air rods (17) are fixedly connected to the top outer wall of the horizontal plate (15). Temperature sensor (19) is fixedly installed on one side of the inner wall of the cable branch box body (1); The guide fan (18) is fixedly embedded in the inner wall of one side of the cable branch box body (1) and is symmetrically arranged with multiple exhaust ports (2).

2. The intelligent cable branch box according to claim 1, characterized in that, Each of the exhaust ports (2) has a filter screen (3) embedded on one side of its inner wall. The bottom of the cable branch box body (1) is fixedly connected to a base (6). Limiting frames (10) are fixedly connected to the inner walls on both sides of the cable branch box body (1), and the air rod (17) is fixedly installed on the limiting frame (10).

3. The intelligent cable branch box according to claim 1, characterized in that, The top of the horizontal plate (15) is fixedly connected to a limiting rod (16), and the limiting rod (16) is movably inserted into the limiting frame (10). The bottom ends of the two baffles (11) are respectively fixedly connected to sealing strips (14), and the sealing strips (14) are movably attached to the bottom inner wall of the two air inlets (8).

4. The intelligent cable branch box according to claim 2, characterized in that, The cleaning mechanism (7) includes: Two inclined guide plates (701) are symmetrically fixed to the inner walls of the opposite sides of the cable branch box body (1), and their top ends are fixedly attached to the bottom end of the air inlet (8). Two through slots (703) are symmetrically arranged on the inner wall of the base (6), and the two ends of the through slots (703) pass through the top and one side of the base (6) respectively.

5. The intelligent cable branch box according to claim 4, characterized in that, The cleaning mechanism (7) further includes: Two baffles (702) are fixedly connected to the bottom inner wall of the cable branch box body (1); Two water guide plates (704) are symmetrically fixed to the outer walls of the cable branch box body (1) on both sides and respectively attached to the bottom of the two air inlets (8).

6. The intelligent cable branch box according to claim 5, characterized in that, The cleaning mechanism (7) further includes: Multiple leakage micro-holes (708) are provided through the bottom inner wall of each water guide plate (704); Two slots (707) are respectively provided on one side of the inner wall of each water guide plate (704).

7. The intelligent cable branch box according to claim 6, characterized in that, The cleaning mechanism (7) further includes: Two inserters (706) are respectively interference-fitted into two slots (707); An extension plate (705) is fixedly connected to one side of the outer wall of the two inserts (706).

8. The intelligent cable branch box according to claim 1, characterized in that, The fire extinguishing mechanism (5) includes: The high-pressure gas storage chamber (502) is fixedly installed on the top outer wall of the top cover (4) by multiple mounting brackets (501); The gas pipeline (508) is fixedly connected to the inner wall of the bottom end of the high-pressure gas storage chamber (502).

9. The intelligent cable branch box according to claim 8, characterized in that, The fire extinguishing mechanism (5) also includes: A temperature-sensitive glass bulb (505) is fixedly plugged inside the gas delivery pipe (508); Multiple heat-conducting ribs (507) are fixedly connected at equal intervals to the outer circumference of the gas transmission pipe (508), and the multiple heat-conducting ribs (507) are bent downwards.

10. An intelligent cable branch box according to claim 9, characterized in that, The fire extinguishing mechanism (5) also includes: The diversion pipe (503) is fixedly connected to the inner walls of both sides of the gas transmission pipe (508); Multiple powder storage tanks (504) are fixedly connected at equal intervals to the inner wall of the bottom end of the diversion pipe (503), and each powder storage tank (504) is filled with ultrafine dry powder. Multiple sealing diaphragms (506) are fixedly sealed at the output ends of multiple powder storage tanks (504).

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