Waterproof and dustproof power distribution cabinet

Abstract

The invention discloses a waterproof and dustproof power distribution cabinet, and relates to the technical field of power distribution cabinets, the waterproof and dustproof power distribution cabinet comprises a cabinet body mechanism, the cabinet body mechanism comprises a sealed cabinet body, the front surface of the sealed cabinet body is provided with a cabinet door, the surface of the cabinet door is provided with an observation window, and the lower end of the front surface of the cabinet door is provided with a control panel; and an internal circulation cooling mechanism. The semiconductor cooler is adopted in a heat dissipation mode, heat in air in the power distribution cabinet is directly transferred out, dust is prevented from invading the power distribution cabinet due to internal and external air exchange, meanwhile, the motor and the fan blades are arranged, air internal circulation is formed in the power distribution cabinet, and the heat exchange efficiency of the cold end of the semiconductor cooler and air is improved; the cabinet door is provided with multiple sealing structures to prevent external air and rainwater from entering the power distribution cabinet along gaps of the cabinet door, the air pressure sensors are arranged inside and outside the cabinet body to detect air pressure inside and outside the power distribution cabinet in real time, the inert gas cylinder is utilized to improve the air pressure inside the power distribution cabinet, and dust and water vapor invasion caused by aging of sealing strips is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution cabinets, and in particular to a waterproof and dustproof power distribution cabinet. Background Art

[0002] The distribution cabinet is divided into power distribution cabinet, lighting distribution cabinet and metering cabinet. It is the final equipment of the power distribution system. The distribution cabinet is a general term for the motor control center. The distribution cabinet is suitable for occasions with relatively dispersed loads and fewer circuits; the motor control center is used for occasions with concentrated loads and more circuits. They distribute the power of a circuit of the upper-level distribution equipment to the nearest load. This level of equipment should provide protection, monitoring and control for the load.

[0003] At present, when traditional distribution cabinets are used outdoors or in humid and dusty environments, they are often infiltrated by water vapor and dust due to insufficient sealing performance and fan heat dissipation leading to internal and external air circulation, causing short circuits and corrosion of internal electrical components. When a short circuit occurs, the cable rubber is easily ignited, causing a fire. Therefore, a waterproof and dustproof distribution cabinet is proposed. Summary of the invention

[0004] The present invention provides a waterproof and dustproof power distribution cabinet to solve the problem mentioned in the above background technology that when a traditional power distribution cabinet is used outdoors or in a humid and dusty environment, it is often due to insufficient sealing performance, fan heat dissipation causing internal and external air circulation, etc., which leads to the intrusion of water vapor and dust, causing short circuit and corrosion of internal electrical components. When a short circuit occurs, the cable rubber is easily ignited, thereby causing a fire.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A waterproof and dustproof power distribution cabinet comprises a cabinet mechanism, wherein the cabinet mechanism comprises a sealed cabinet, a cabinet door is arranged on the front of the sealed cabinet, an observation window is arranged on the surface of the cabinet door, and a control panel is arranged at the lower end of the front of the cabinet door; an internal circulation cooling mechanism, wherein the internal circulation cooling mechanism comprises a semiconductor refrigerator, the surface of the semiconductor refrigerator is fixedly connected to the inside of the sealed cabinet, a heat release end is arranged on one side of the semiconductor refrigerator, and a heat absorption end is arranged on the other side of the semiconductor refrigerator; a positive pressure maintaining and fire prevention mechanism in the cabinet, wherein the positive pressure maintaining and fire prevention mechanism in the cabinet comprises a mounting frame, the surface of the mounting frame is fixedly connected to the bottom of the inner cavity of the sealed cabinet, an inert gas cylinder is arranged inside the mounting frame, and the gas outlet of the inert gas cylinder is connected to a hose; a rainwater collecting mechanism, wherein the rainwater collecting mechanism comprises a collecting ceiling, the bottom of the collecting ceiling is fixedly connected to the top of the sealed cabinet, and a guide channel is arranged at the bottom of one side of the collecting ceiling.

[0007] A further improvement of the technical solution of the present invention is that: the cabinet mechanism also includes a first sealing layer, the first sealing layer is fixedly connected to a side of the sealed cabinet close to the cabinet door, the side of the cabinet door close to the sealed cabinet is fixedly connected to a second sealing layer, the side of the second sealing layer close to the first sealing layer is fixedly connected to a third sealing layer, the inner wall of the sealed cabinet is fixedly connected to a distributor, and one side of the third sealing layer is tightly against one side of the first sealing layer.

[0008] A further improvement of the technical solution of the present invention is that: the first sealing layer adopts a magnetic sealing strip, the second sealing layer adopts a polyurethane foam strip, and the third sealing layer adopts a honeycomb silicone sealing strip.

[0009] A further improvement of the technical solution of the present invention is that the internal circulation cooling mechanism also includes a cold air circulation cavity, which is arranged on the back side of the inner cavity of the sealed cabinet, and a circulation port is arranged on one side of the inner cavity of the cold air circulation cavity.

[0010] A further improvement of the technical solution of the present invention is that the heat absorption end is arranged on one side of the inner cavity of the cold air circulation cavity, the inner wall of the cold air circulation cavity is fixedly connected with a mounting frame, the interior of the mounting frame is fixedly connected with a motor, one end of the motor shaft is fixedly connected with a fan blade, and the motor is electrically connected to the control panel.

[0011] A further improvement of the technical solution of the present invention is that the positive pressure maintaining and fire protection mechanism in the cabinet also includes a solenoid valve, which is arranged inside the hose, and one side of the solenoid valve is fixedly connected to the surface of the cabinet door.

[0012] A further improvement of the technical solution of the present invention is that the solenoid valve is electrically connected to the control panel, one end of the hose is connected to a hollow air outlet frame, one side of the hollow air outlet frame is fixedly connected to one side of the cabinet door, and an air outlet is provided on the surface of the hollow air outlet frame.

[0013] A further improvement of the technical solution of the present invention is that: a fixing block is fixedly connected to the surface of the mounting frame, a guide rod is fixedly connected to the surface of the fixing block, a pressure rod is slidably connected to the surface of the guide rod, the surface of the pressure rod is tightly abutted against the surface of the inert gas cylinder, and a threaded rod is connected to the internal thread of one end of the pressure rod away from the guide rod.

[0014] A further improvement of the technical solution of the present invention is that the positive pressure maintaining and fire protection mechanism in the cabinet also includes a first air pressure sensor and a second air pressure sensor, one side of the first air pressure sensor is fixedly connected to the side of the cabinet door close to the sealed cabinet body, and one side of the second air pressure sensor is fixedly connected to the side of the cabinet door away from the sealed cabinet body, and the first air pressure sensor and the second air pressure sensor are both electrically connected to the control panel.

[0015] A further improvement of the technical solution of the present invention is that the rainwater collection mechanism also includes a diverter trough, one side of which is fixedly connected to the back of the sealed cabinet, and the bottom of the diverter trough is provided with a water outlet corresponding to the heat sink on the surface of the heat release end, and the diverter trough, the guide channel and the interior of the collection ceiling are connected.

[0016] Due to the adoption of the above technical solution, the present invention has the following technical advances compared with the prior art:

[0017] The present invention provides a waterproof and dustproof power distribution cabinet. A semiconductor refrigerator is used in a heat dissipation manner to directly transfer heat in the air inside the power distribution cabinet, thereby preventing dust from intruding into the power distribution cabinet due to the exchange of internal and external air. A motor and a fan blade are arranged at the same time, so that an internal air circulation is formed inside the cabinet, thereby improving the heat exchange efficiency between the cold end of the semiconductor refrigerator and the air. A cabinet door is provided with multiple sealing structures to prevent outside air and rainwater from entering the power distribution cabinet along the cabinet door gap. Air pressure sensors are arranged inside and outside the cabinet to detect the air pressure inside and outside the power distribution cabinet in real time. An inert gas cylinder is used to increase the air pressure inside the power distribution cabinet, thereby preventing dust and water vapor from intruding due to aging of sealing strips. At the same time, the oxygen content in the power distribution cabinet can be reduced, thereby inhibiting the burning of cable rubber during short circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the back structure of the present invention;

[0021] Figure 4 It is a schematic diagram of the back structure of the present invention in a disassembled state;

[0022] Figure 5 This is a schematic diagram of the front structure of the present invention in a decomposed state;

[0023] Figure 6 It is a side cross-sectional structural schematic diagram of the present invention;

[0024] Figure 7 It is a schematic diagram of the exploded structure of the positive pressure maintenance and fire prevention mechanism in the cabinet of the present invention;

[0025] Figure 8 For the present invention Figure 7 The enlarged structural diagram at A in the middle;

[0026] Fig. 9 For the present invention Figure 6 The enlarged structural diagram at B in the middle;

[0027] Fig.10 For the present invention Figure 7 Enlarged structural diagram at point C in the middle.

[0028] In the figure: 11, sealed cabinet; 12, cabinet door; 13, observation window; 14, control panel; 15, first sealing layer; 16, second sealing layer; 17, third sealing layer; 18, distributor; 21, semiconductor refrigerator; 22, heat release end; 23, heat absorption end; 24, cold air circulation cavity; 25, installation frame; 26, motor; 27, fan blade; 28, circulation port; 31, installation frame; 32, inert gas bottle; 33, hose; 34, solenoid valve; 35, hollow air outlet frame; 36, fixing block; 37, guide rod; 38, pressure rod; 39, threaded rod; 310, first air pressure sensor; 311, second air pressure sensor; 41, collecting ceiling; 42, diversion channel; 43, diversion trough. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with embodiments:

[0030] Example 1

[0031] like Figure 1-10 As shown, the present invention provides a waterproof and dustproof power distribution cabinet, including a cabinet body mechanism, the cabinet body mechanism includes a sealed cabinet 11, a cabinet door 12 is arranged on the front of the sealed cabinet 11, an observation window 13 is arranged on the surface of the cabinet door 12, and a control panel 14 is arranged at the lower end of the front of the cabinet door 12; an internal circulation cooling mechanism, the internal circulation cooling mechanism includes a semiconductor refrigerator 21, the surface of the semiconductor refrigerator 21 is fixedly connected to the inside of the sealed cabinet 11, a heat release end 22 is arranged on one side of the semiconductor refrigerator 21, and a heat absorption end 23 is arranged on the other side of the semiconductor refrigerator 21; a positive pressure maintaining and fire prevention mechanism in the cabinet, the positive pressure maintaining and fire prevention mechanism in the cabinet includes a mounting frame 31, the surface of the mounting frame 31 is fixedly connected to the bottom of the inner cavity of the sealed cabinet 11, an inert gas cylinder 32 is arranged inside the mounting frame 31, and the gas outlet of the inert gas cylinder 32 It is connected with a hose 33; a rainwater collecting mechanism, which includes a collecting ceiling 41, the bottom of which is fixedly connected to the top of the sealed cabinet 11, a guide channel 42 is provided at the bottom of one side of the collecting ceiling 41, and the cabinet mechanism also includes a first sealing layer 15, the first sealing layer 15 is fixedly connected to a side of the sealed cabinet 11 close to the cabinet door 12, a second sealing layer 16 is fixedly connected to a side of the cabinet door 12 close to the sealed cabinet 11, a third sealing layer 17 is fixedly connected to a side of the second sealing layer 16 close to the first sealing layer 15, a distributor 18 is fixedly connected to the inner wall of the sealed cabinet 11, one side of the third sealing layer 17 is tightly against one side of the first sealing layer 15, the first sealing layer 15 adopts a magnetic sealing strip, the second sealing layer 16 adopts a polyurethane foam strip, and the third sealing layer 17 adopts a honeycomb silicone sealing strip.

[0032] In this embodiment, efficient sealing is achieved by sealing the cabinet body 11 and the cabinet door 12 through three-level sealing layers. When the cabinet door 12 is closed, the third sealing layer 17 first fits tightly with the first sealing layer 15 of the sealed cabinet body 11, and the elasticity of the silicone is used to fill the gap; at the same time, the second sealing layer 16 forms a buffer seal on the inner side of the cabinet door 12, and the magnetic force of the magnetic sealing strip further enhances the sealing stability. The three work together to block rainwater and dust from entering the interior of the cabinet. The observation window 13 uses high-strength tempered glass with a hydrophobic and dust-proof surface treatment to facilitate external observation of the status of the equipment in the cabinet; the control panel 14 integrates an operating interface and connects internal electrical components to achieve intelligent control of the distribution cabinet.

[0033] Example 2

[0034] like Figure 1-10As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, it includes a cabinet mechanism, the cabinet mechanism includes a sealed cabinet 11, a cabinet door 12 is provided on the front of the sealed cabinet 11, an observation window 13 is provided on the surface of the cabinet door 12, and a control panel 14 is provided at the lower end of the front of the cabinet door 12; an internal circulation cooling mechanism, the internal circulation cooling mechanism includes a semiconductor refrigerator 21, the surface of the semiconductor refrigerator 21 is fixedly connected to the inside of the sealed cabinet 11, a heat release end 22 is provided on one side of the semiconductor refrigerator 21, and a heat absorption end 23 is provided on the other side of the semiconductor refrigerator 21; a positive pressure maintaining and fire prevention mechanism in the cabinet, the positive pressure maintaining and fire prevention mechanism in the cabinet includes a mounting frame 31, the surface of the mounting frame 31 is fixedly connected to the bottom of the inner cavity of the sealed cabinet 11, an inert gas cylinder 32 is arranged inside the mounting frame 31, and the gas outlet of the inert gas cylinder 32 is connected to a hose 33; a rainwater collection mechanism, the rainwater collection mechanism includes a collection ceiling 41, the bottom of the collection ceiling 41 is fixedly connected to the top of the sealed cabinet 11, and a guide channel 42 is arranged at the bottom of one side of the collection ceiling 41. The cabinet mechanism also includes a first sealing layer 15, the first sealing layer 15 is fixedly connected to a side of the sealed cabinet 11 close to the cabinet door 12, and the cabinet door 12 is fixedly connected to a second sealing layer 16 on a side close to the sealed cabinet 11, and the second sealing layer 16 is fixedly connected to a side close to the first sealing layer 15. A third sealing layer 17 is connected, and a distributor 18 is fixedly connected to the inner wall of the sealed cabinet 11. One side of the third sealing layer 17 is tightly against one side of the first sealing layer 15. The first sealing layer 15 adopts a magnetic sealing strip, the second sealing layer 16 adopts a polyurethane foam strip, and the third sealing layer 17 adopts a honeycomb silicone sealing strip. The internal circulation cooling mechanism also includes a cold air circulation cavity 24, which is arranged on the back of the inner cavity of the sealed cabinet 11, and a circulation port 28 is arranged on one side of the inner cavity of the cold air circulation cavity 24. The heat absorption end 23 is arranged on one side of the inner cavity of the cold air circulation cavity 24, and the inner wall of the cold air circulation cavity 24 is fixedly connected to a mounting frame 25, and the inside of the mounting frame 25 is fixedly connected to a motor 26 One end of the rotating shaft of the motor 26 is fixedly connected with a fan blade 27, and the motor 26 is electrically connected to the control panel 14. The positive pressure maintaining and fire protection mechanism in the cabinet also includes a solenoid valve 34, which is arranged inside the hose 33, and one side of the solenoid valve 34 is fixedly connected to the surface of the cabinet door 12, and the solenoid valve 34 is electrically connected to the control panel 14. One end of the hose 33 is connected to a hollow air outlet frame 35, and one side of the hollow air outlet frame 35 is fixedly connected to one side of the cabinet door 12, and an air outlet is arranged on the surface of the hollow air outlet frame 35. A fixed block 36 is fixedly connected to the surface of the mounting frame 31, and a guide rod 37 is fixedly connected to the surface of the fixed block 36, and a pressure rod 38 is slidably connected to the surface of the guide rod 37.

[0035] In this embodiment, when the temperature in the cabinet is lowered, the heat absorbing end 23 of the semiconductor refrigerator 21 is located in the cold air circulation cavity 24 on the back of the sealed cabinet 11, and the fan blade 27 is driven by the motor 26 to rotate, so that the hot air in the cabinet is sucked into the cold air circulation cavity 24. After being cooled by the heat absorbing end 23, the cold air returns to the inside of the cabinet through the circulation port 28 to form an internal circulation. The heat sink on the surface of the heat releasing end 22 transfers the heat to the outside of the cabinet. In conjunction with the diversion groove 43 of the rainwater collection mechanism, rainwater flows through the heat sink on rainy days and takes away the heat by evaporation, thereby enhancing the heat dissipation efficiency. At the same time, the surface of the heat releasing end 22 is rinsed to prevent dust accumulation from affecting the heat dissipation. On sunny days, the heat sink dissipates heat naturally to ensure the long-term and stable operation of the semiconductor refrigerator 21. At the same time, the temperature threshold can be preset through the control panel 14. When the temperature sensor in the cabinet detects that the temperature is too high, the motor 26 and the semiconductor refrigerator 21 are automatically started to adjust the wind speed and cooling power to maintain the temperature in the cabinet within a safe range.

[0036] Example 3

[0037] like Figure 1-10As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, it includes a cabinet mechanism, the cabinet mechanism includes a sealed cabinet 11, a cabinet door 12 is provided on the front of the sealed cabinet 11, an observation window 13 is provided on the surface of the cabinet door 12, and a control panel 14 is provided at the lower end of the front of the cabinet door 12; an internal circulation cooling mechanism, the internal circulation cooling mechanism includes a semiconductor refrigerator 21, the surface of the semiconductor refrigerator 21 is fixedly connected to the inside of the sealed cabinet 11, a heat release end 22 is provided on one side of the semiconductor refrigerator 21, and a heat absorption end 23 is provided on the other side of the semiconductor refrigerator 21; a positive pressure maintaining and fire prevention mechanism in the cabinet, The positive pressure maintenance and fire prevention mechanism in the cabinet includes a mounting frame 31, the surface of the mounting frame 31 is fixedly connected to the bottom of the inner cavity of the sealed cabinet 11, an inert gas cylinder 32 is arranged inside the mounting frame 31, and the gas outlet of the inert gas cylinder 32 is connected to a hose 33; a rainwater collection mechanism, the rainwater collection mechanism includes a collection ceiling 41, the bottom of the collection ceiling 41 is fixedly connected to the top of the sealed cabinet 11, and a guide channel 42 is arranged at the bottom of one side of the collection ceiling 41. The cabinet mechanism also includes a first sealing layer 15, the first sealing layer 15 is fixedly connected to one side of the sealed cabinet 11 close to the cabinet door 12, and the cabinet door 12 is fixed to one side of the sealed cabinet 11. A second sealing layer 16 is connected, and a third sealing layer 17 is fixedly connected to one side of the second sealing layer 16 close to the first sealing layer 15. A distributor 18 is fixedly connected to the inner wall of the sealed cabinet 11. One side of the third sealing layer 17 is tightly against one side of the first sealing layer 15. The first sealing layer 15 adopts a magnetic sealing strip, the second sealing layer 16 adopts a polyurethane foam strip, and the third sealing layer 17 adopts a honeycomb silicone sealing strip. The surface of the pressure rod 38 is tightly against the surface of the inert gas cylinder 32. The internal thread of the pressure rod 38 away from the guide rod 37 is connected to a threaded rod 39. The positive pressure maintenance and fire prevention mechanism in the cabinet also includes a first air pressure sensor 3 10 and a second air pressure sensor 311, one side of the first air pressure sensor 310 is fixedly connected to the side of the cabinet door 12 close to the sealed cabinet body 11, one side of the second air pressure sensor 311 is fixedly connected to the side of the cabinet door 12 away from the sealed cabinet body 11, the first air pressure sensor 310 and the second air pressure sensor 311 are both electrically connected to the control panel 14, the rainwater collection mechanism also includes a diverter groove 43, one side of the diverter groove 43 is fixedly connected to the back side of the sealed cabinet body 11, the bottom of the diverter groove 43 is provided with a water outlet corresponding to the heat sink on the surface of the heat release end 22, and the diverter groove 43, the guide channel 42 and the collection ceiling 41 are internally connected.

[0038] In this embodiment, the inert gas cylinder 32 is fixed by the mounting frame 31, and the hollow air outlet frame 35 is connected by the hose 33. The first air pressure sensor 310 and the second air pressure sensor 311 monitor the air pressure inside and outside the cabinet respectively. When the air pressure inside the cabinet is lower than that outside, such as due to a slight leakage in the seal, the control panel 14 triggers the solenoid valve 34, and the inert gas such as nitrogen flows into the hollow air outlet frame 35 through the hose 33, and is evenly filled into the cabinet through the surface air outlet, so that the air pressure inside the cabinet is slightly higher than that outside, forming a positive pressure barrier to prevent dust and rainwater from flowing back. When the temperature sensor inside the cabinet detects When an abnormally high temperature is detected, the control panel 14 immediately fully opens the solenoid valve 34 to quickly release the inert gas, reduce the oxygen concentration, and suppress the spread of fire. The fixed structure composed of the pressure rod 38 and the threaded rod 39 ensures the stability of the inert gas cylinder 32 to avoid gas leakage caused by vibration: the collection ceiling 41 is designed to be inclined, and the rainwater is collected into the diversion channel 42 and guided to the back of the cabinet through the diversion groove 43. The water outlet at the bottom of the diversion groove 43 is aligned with the heat sink of the heat release end 22. When the rainwater flows through the heat sink, it absorbs heat, reducing the heat dissipation load of the semiconductor refrigerator 21.

[0039] The following is a detailed description of the working principle of this waterproof and dustproof distribution cabinet.

[0040] like Figure 1-10As shown, the sealed cabinet 11 and the cabinet door 12 are efficiently sealed through three-level sealing layers. When the cabinet door 12 is closed, the third sealing layer 17 first fits tightly with the first sealing layer 15 of the sealed cabinet 11, and the elasticity of the silicone is used to fill the gap; at the same time, the second sealing layer 16 forms a buffer seal on the inner side of the cabinet door 12, and the magnetic force of the magnetic sealing strip further enhances the sealing stability. The three work together to block rainwater and dust from entering the cabinet. The observation window 13 is made of high-strength tempered glass, and the surface is treated with hydrophobic and dust-proof treatment, which is convenient for external observation of the status of the equipment in the cabinet; the control panel 14 integrates an operation interface and connects internal electrical components to realize intelligent control of the distribution cabinet and the cabinet. When cooling inside, the heat absorbing end 23 of the semiconductor refrigerator 21 is located in the cold air circulation cavity 24 on the back of the sealed cabinet 11, and the fan blade 27 is driven by the motor 26 to rotate, so that the hot air in the cabinet is sucked into the cold air circulation cavity 24. After cooling at the heat absorbing end 23, the cold air returns to the inside of the cabinet through the circulation port 28, forming an internal circulation. The heat sink on the surface of the heat releasing end 22 transfers the heat to the outside of the cabinet, and cooperates with the diversion groove 43 of the rainwater collection mechanism. On rainy days, rainwater flows through the heat sink and takes away the heat by evaporation, thereby enhancing the heat dissipation efficiency; at the same time, the surface of the heat releasing end 22 is washed to prevent dust accumulation from affecting the heat dissipation. On sunny days, the heat sink dissipates heat naturally, ensuring that the semiconductor refrigerator 21 Long-term stable operation, and the temperature threshold can be preset through the control panel 14. When the temperature sensor in the cabinet detects that the temperature is too high, the motor 26 and the semiconductor refrigerator 21 are automatically started to adjust the wind speed and cooling power to maintain the temperature in the cabinet within a safe range. At the same time, the mounting frame 31 fixes the inert gas bottle 32, and connects the hollow air outlet frame 35 through the hose 33. The first air pressure sensor 310 and the second air pressure sensor 311 monitor the air pressure inside and outside the cabinet respectively. When the air pressure inside the cabinet is lower than that outside, such as due to a slight leakage in the seal, the control panel 14 triggers the solenoid valve 34, and the inert gas such as nitrogen flows into the hollow air outlet frame 35 through the hose 33 and is evenly filled into the cabinet through the surface outlet. , so that the air pressure inside the cabinet is slightly higher than that outside, forming a positive pressure barrier to prevent dust and rainwater from flowing back. When the temperature sensor in the cabinet detects an abnormally high temperature, the control panel 14 immediately fully opens the solenoid valve 34 to quickly release the inert gas, reduce the oxygen concentration, and suppress the spread of the fire. The fixed structure composed of the pressure rod 38 and the threaded rod 39 ensures the stability of the inert gas cylinder 32 to avoid gas leakage caused by vibration: the collection ceiling 41 is designed to be inclined, and the rainwater is collected into the diversion channel 42 and guided to the back of the cabinet through the diversion groove 43. The water outlet at the bottom of the diversion groove 43 is aligned with the heat sink of the heat release end 22. When the rainwater flows through the heat sink, it absorbs heat, reducing the heat dissipation load of the semiconductor refrigerator 21.

[0041] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A waterproof and dustproof power distribution cabinet, characterized in that: include A cabinet mechanism, the cabinet mechanism comprising a sealed cabinet (11), a cabinet door (12) being arranged on the front of the sealed cabinet (11), an observation window (13) being arranged on the surface of the cabinet door (12), and a control panel (14) being arranged at the lower end of the front of the cabinet door (12); An internal circulation cooling mechanism, the internal circulation cooling mechanism comprising a semiconductor refrigerator (21), the surface of the semiconductor refrigerator (21) being fixedly connected to the inside of the sealed cabinet (11), a heat release end (22) being provided on one side of the semiconductor refrigerator (21), and a heat absorption end (23) being provided on the other side of the semiconductor refrigerator (21); A positive pressure maintaining and fire prevention mechanism in a cabinet, the positive pressure maintaining and fire prevention mechanism in the cabinet comprising a mounting frame (31), the surface of the mounting frame (31) being fixedly connected to the bottom of the inner cavity of the sealed cabinet (11), an inert gas bottle (32) being arranged inside the mounting frame (31), and a gas outlet of the inert gas bottle (32) being connected to a hose (33); A rainwater collection mechanism, the rainwater collection mechanism comprising a collection ceiling (41), the bottom of the collection ceiling (41) being fixedly connected to the top of the sealed cabinet (11), and a guide channel (42) being provided at the bottom of one side of the collection ceiling (41).

2. A waterproof and dustproof power distribution cabinet according to claim 1, characterized in that: The cabinet structure further comprises a first sealing layer (15), the first sealing layer (15) being fixedly connected to a side of the sealed cabinet (11) close to the cabinet door (12), a second sealing layer (16) being fixedly connected to a side of the cabinet door (12) close to the sealed cabinet (11), a third sealing layer (17) being fixedly connected to a side of the second sealing layer (16) close to the first sealing layer (15), a distributor (18) being fixedly connected to an inner wall of the sealed cabinet (11), and one side of the third sealing layer (17) being in close contact with one side of the first sealing layer (15).

3. A waterproof and dustproof power distribution cabinet according to claim 2, characterized in that: The first sealing layer (15) adopts a magnetic sealing strip, the second sealing layer (16) adopts a polyurethane foam strip, and the third sealing layer (17) adopts a honeycomb silicone sealing strip.

4. The waterproof and dustproof power distribution cabinet according to claim 1, characterized in that: The internal circulation cooling mechanism also includes a cold air circulation cavity (24), which is arranged on the back side of the inner cavity of the sealed cabinet (11), and a circulation port (28) is arranged on one side of the inner cavity of the cold air circulation cavity (24).

5. A waterproof and dustproof power distribution cabinet according to claim 4, characterized in that; The heat absorption end (23) is arranged on one side of the inner cavity of the cold air circulation cavity (24); the inner wall of the cold air circulation cavity (24) is fixedly connected to a mounting frame (25); the interior of the mounting frame (25) is fixedly connected to a motor (26); one end of the rotating shaft of the motor (26) is fixedly connected to a fan blade (27); and the motor (26) is electrically connected to the control panel (14).

6. The waterproof and dustproof power distribution cabinet according to claim 1, characterized in that: The positive pressure maintaining and fire prevention mechanism in the cabinet further comprises a solenoid valve (34), wherein the solenoid valve (34) is arranged inside the hose (33), and one side of the solenoid valve (34) is fixedly connected to the surface of the cabinet door (12).

7. The waterproof and dustproof power distribution cabinet according to claim 6, characterized in that: The solenoid valve (34) is electrically connected to the control panel (14); one end of the hose (33) is connected to a hollow air outlet frame (35); one side of the hollow air outlet frame (35) is fixedly connected to one side of the cabinet door (12); and an air outlet is provided on the surface of the hollow air outlet frame (35).

8. The waterproof and dustproof power distribution cabinet according to claim 1, characterized in that: A fixing block (36) is fixedly connected to the surface of the mounting frame (31), a guide rod (37) is fixedly connected to the surface of the fixing block (36), a pressure rod (38) is slidably connected to the surface of the guide rod (37), the surface of the pressure rod (38) is tightly abutted against the surface of the inert gas bottle (32), and a threaded rod (39) is internally threadedly connected to one end of the pressure rod (38) away from the guide rod (37).

9. The waterproof and dustproof power distribution cabinet according to claim 1, characterized in that: The positive pressure maintaining and fire prevention mechanism in the cabinet further comprises a first air pressure sensor (310) and a second air pressure sensor (311); one side of the first air pressure sensor (310) is fixedly connected to a side of the cabinet door (12) close to the sealed cabinet body (11); one side of the second air pressure sensor (311) is fixedly connected to a side of the cabinet door (12) away from the sealed cabinet body (11); and both the first air pressure sensor (310) and the second air pressure sensor (311) are electrically connected to the control panel (14).

10. The waterproof and dustproof power distribution cabinet according to claim 1, characterized in that: The rainwater collection mechanism further comprises a diversion groove (43), one side of which is fixedly connected to the back side of the sealed cabinet (11), a water outlet corresponding to the heat sink on the surface of the heat release end (22) is provided at the bottom of the diversion groove (43), and the diversion groove (43), the guide channel (42) and the interior of the collection ceiling (41) are connected.

Images