A ventilation mechanism for positive pressure explosion-proof distribution cabinet

Abstract

The utility model relates to the technical field of power distribution cabinets, and in particular to a ventilation mechanism of a positive pressure explosion-proof power distribution cabinet, comprising a power distribution cabinet, wherein an air inlet device is arranged on the top of the power distribution cabinet, the air inlet device comprises a box body arranged on the top of the power distribution cabinet, an air inlet is opened on the side of the box body, a dust cover is arranged on the outer side of the air inlet, the bottom of the box body is connected with the inside of the power distribution cabinet body through a through hole opened on the top of the power distribution cabinet body, a filter bin is arranged inside the box body, a heat dissipation device is arranged at the bottom end of the inside of the power distribution cabinet body, the heat dissipation device is composed of a heat exchange box, a cooling pipe and a support box, and is used to reduce the heat generated by the long-term use of electrical components in the cabinet. The ventilation mechanism of the positive pressure explosion-proof power distribution cabinet realizes the replacement of clean gas inside the power distribution cabinet through the air inlet device and the air outlet pipe, realizes efficient heat dissipation inside the power distribution cabinet through the unique heat dissipation device, increases practicality, and further improves the safety of the positive pressure explosion-proof power distribution cabinet.

Description

Technical Field

[0001] The utility model relates to the technical field of power distribution cabinets, in particular to a ventilation mechanism of a positive pressure explosion-proof power distribution cabinet. Background Art

[0002] With the rapid development of industries such as kerosene chemical, metal smelting, and chemical pharmaceuticals, the equipment in these industries is often in explosive and dangerous environments. In these environments, electrical equipment and distribution cabinets may generate sparks or form high-temperature surfaces. Once they encounter explosive gas mixtures on site, they may cause explosion accidents, directly endangering the property and life safety of users.

[0003] The emergence of positive pressure explosion-proof distribution cabinets has greatly improved the safety of equipment in explosive hazardous environments. It uses positive pressure technology to continuously inject fresh air into the cabinet to ensure that the internal positive pressure is maintained, thereby effectively preventing the entry of potential explosive gas mixtures from the outside. However, the risk of gas leakage during the ventilation process is always a problem that needs to be solved. Although the traditional ventilation method can maintain positive pressure to a certain extent, problems such as poor cabinet sealing or loose air pipe connections may become safety hazards. Once a gas leak occurs, it will not only make the positive pressure protection ineffective, but may also cause external explosive gas mixtures to enter the cabinet, causing serious consequences. In order to further improve the safety of positive pressure explosion-proof distribution cabinets, a more efficient, safer and more convenient ventilation device is needed to improve its ventilation process. Utility Model Content

[0004] The utility model aims to provide a ventilation mechanism for a positive pressure explosion-proof distribution cabinet to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A ventilation mechanism for a positive pressure explosion-proof power distribution cabinet comprises a power distribution cabinet, an air inlet device is arranged on the top of the power distribution cabinet, the air inlet device comprises a box body arranged on the top of the power distribution cabinet, an air inlet is opened on the side of the box body, a dust cover is arranged on the outside of the air inlet, the bottom of the box body is connected with the inside of the power distribution cabinet body through a through hole opened on the top of the power distribution cabinet body, a filter bin is arranged inside the box body, a heat dissipation device is arranged at the bottom end of the inside of the power distribution cabinet body, the heat dissipation device is composed of a heat exchange box, a cooling pipe and a support box, and is used to reduce the heat generated by the long-term use of electrical components in the cabinet.

[0007] Preferably, a fan is installed inside the box, the air inlet end of the fan is connected to the filter bin, a one-way air inlet valve is arranged inside the air inlet end, the air outlet end of the fan is sealed and connected to the through hole on the top of the power distribution cabinet through a sealing ring, the filter bin comprises a filter screen and an installation frame, installation grooves are recessed on both sides of the installation frame, a filter screen is slidably connected inside the installation groove, a handle is installed on the outside of the filter screen, and a cover door is hinged on the outer side of the box body through a hinge.

[0008] Preferably, the heat exchanger box is installed at the bottom of the power distribution cabinet, and a support box is arranged above the heat exchanger box. A cooling pipe and a blower are installed in the support box. A liquid inlet pipe is installed at one end of the cooling pipe, and the liquid inlet pipe is connected to the liquid inlet end of the circulating pump arranged outside the heat exchanger box. The liquid outlet end of the circulating pump is connected to the heat exchanger box, and a liquid outlet pipe is installed on the outer wall of the heat exchanger box away from the circulating pump, and one end of the liquid outlet pipe extends to the inside of the cooling pipe.

[0009] Preferably, the air outlet passes through the power distribution cabinet and is connected to the air supply duct, an air duct is installed on the inner wall of the power distribution cabinet, the air supply duct is connected to the air duct, and a plurality of air outlets are opened on the wall of the air duct.

[0010] Preferably, exhaust pipes are provided at the bottom ends of both sides of the power distribution cabinet, one-way exhaust valves are provided inside the exhaust pipes, and sealing covers are respectively provided on the outer walls of the exhaust pipes.

[0011] Preferably, a pressure sensor and a temperature sensor are provided inside the cabinet.

[0012] Compared with the prior art, the technical effects and advantages of the utility model are:

[0013] By setting up an air inlet device, external dust and impurities can be effectively prevented from entering the distribution cabinet, protecting electrical components from pollution and damage. The air quality inside the distribution cabinet can be effectively maintained to prevent electrical components from being polluted and damaged. By setting up a heat dissipation device, the heat generated during the operation of the electrical components can be effectively reduced to ensure the normal operation and service life of the equipment. At the same time, the stability of the internal pressure of the distribution cabinet can be ensured to prevent accidents such as fire and explosion, thereby ensuring the normal operation and service life of the distribution cabinet and electrical components. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the utility model at A;

[0017] Figure 4This is a schematic diagram of the box structure of the utility model;

[0018] Figure 5 This is a schematic diagram of the installation frame and filter structure of the utility model.

[0019] In the figure: 1. distribution cabinet; 2. air inlet device; 3. box body; 4. air inlet; 5. dust cover; 6. through hole; 7. filter compartment; 8. heat dissipation device; 9. heat exchange box; 10. cooling pipe; 11. support box; 12. fan; 13. air inlet end; 14. air outlet end; 15. sealing ring; 16. filter screen; 17. installation frame; 18. installation slot; 19. handle; 20. cover door; 21. blower; 22. liquid inlet pipe; 23. circulation pump; 24. liquid outlet pipe; 25. air supply pipe; 26. air guide pipe; 27. air outlet; 28. one-way air inlet valve; 29. ​​exhaust pipe; 30. one-way exhaust valve; 31. sealing cover; 32. pressure sensor; 33. temperature sensor. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figures 1 to 5 The utility model provides a technical solution

[0022] A ventilation mechanism of a positive pressure explosion-proof power distribution cabinet, comprising a power distribution cabinet 1, an air inlet device 2 is arranged on the top of the power distribution cabinet 1, the air inlet device 2 comprises a box 3 arranged on the top of the power distribution cabinet 1, an air inlet 4 is opened on the side of the box 3, a dust cover 5 is arranged on the outside of the air inlet 4, the bottom of the box 3 is connected to the inside of the power distribution cabinet 1 through a through hole 6 opened on the top of the power distribution cabinet 1, a filter bin 7 is arranged inside the box 3, and the dust and impurities from the outside are effectively prevented from entering the power distribution cabinet 1 through the dust cover 5 and the filter bin 7 of the air inlet device 2. Inside the cabinet 1, the electrical components are protected from pollution and damage, and the quality of the air entering the distribution cabinet 1 is guaranteed. The filtered air enters the distribution cabinet 1 through the through hole 6, and is then discharged by the exhaust pipe 29 to keep the air in the cabinet clean and explosion-proof. A heat dissipation device 8 is provided at the bottom end of the distribution cabinet 1. The heat dissipation device 8 is composed of a heat exchange box 9, a cooling pipe 10 and a support box 11. The heat exchange box 9 and the cooling pipe 10 of the heat dissipation device 8 can effectively reduce the heat generated during the operation of the electrical components, thereby ensuring the normal operation and service life of the equipment.

[0023] Specifically, a fan 12 is installed inside the box 3, and the air inlet end 13 of the fan 12 is connected to the filter bin 7. A one-way air inlet valve 28 is arranged inside the air inlet end 13. The air outlet end 14 of the fan 12 is sealed and connected to the through hole 6 on the top of the power distribution cabinet 1 through a sealing ring 15. The filter bin 7 includes a filter screen 16 and a mounting frame 17. The mounting frame 17 has mounting grooves 18 on both sides. The filter screen 16 is slidably connected inside the mounting groove 18. A handle 19 is installed on the outside of the filter screen 16. The outer side of the box 3 is hinged by a hinge. There is a cover door 20, and the fan 12 generates suction to inhale the outside air through the air inlet 4 and the dust cover 5. The inhaled air first enters the filter compartment 7, and the filter 16 filters the air. The filter 16 can be easily removed and replaced from the installation frame 17 through the handle 19 to maintain the filtering effect. At the same time, the cover door 20 is hinged by hinges, which is easy to open and close, and convenient for cleaning and maintenance of the inside of the box body 3. The filtered air is pushed by the fan 12 and sealed and connected with the through hole 6 on the top of the distribution cabinet 1 through the sealing ring 15 to enter the inside of the distribution cabinet 1. Due to the pushing action of the fan and the inflow of fresh air, positive pressure is formed, and the original gas in the cabinet is discharged through the exhaust pipe 29 to maintain the air cleanliness and explosion-proof safety in the cabinet.

[0024] Specifically, the heat exchange box 9 is installed at the bottom of the power distribution cabinet 1, and a support box 11 is arranged above the heat exchange box 9. A cooling pipe 10 and a blower 21 are installed in the support box 11. A liquid inlet pipe 22 is installed at one end of the cooling pipe 10. The liquid inlet pipe 22 is connected to the liquid inlet end of a circulating pump 23 arranged outside the heat exchange box 9. The liquid outlet end of the circulating pump 23 is connected to the heat exchange box 9. A liquid outlet pipe 24 is installed on the outer wall of the heat exchange box 9 away from the circulating pump 23. One end of the liquid outlet pipe 24 extends to the cooling pipe 10. Inside the tube 10, the electrical components inside the distribution cabinet 1 transfer heat to the inside of the heat exchange box 9, and the circulating pump 23 transports the low-temperature liquid inside the cooling tube 10 to the inside of the heat exchange box 9 through the liquid inlet pipe 22. The high-temperature liquid generated after the heat exchange is transported to the inside of the cooling tube 10 through the liquid outlet pipe 24. Turn on the blower 21, and in the support box 11, the blower 21 blows air to the cooling tube 10 to accelerate the cooling and heat dissipation of the cooling tube 10, thereby realizing efficient heat dissipation of the distribution cabinet and extending the service life of the electrical components inside the distribution cabinet.

[0025] Specifically, the air outlet end 14 passes through the distribution cabinet 1 and is connected with the air supply duct 25. An air duct 26 is installed on the inner wall of the distribution cabinet 1. The air supply duct 25 is connected to the air duct 26. A plurality of air outlets 27 are opened on the wall of the air duct 26. By setting the air duct 26, the air of the air supply duct can be evenly guided to all corners inside the distribution cabinet. The air outlet ensures that the air can be evenly and widely distributed inside the distribution cabinet, further reducing the temperature of the electrical components, avoiding excessive temperature differences inside the distribution cabinet 1, enhancing the ventilation effect, and maintaining the stability of the internal environment.

[0026] Specifically, exhaust pipes 29 are provided at the bottom ends of both sides of the distribution cabinet 1. One-way electromagnetic exhaust valves 30 are provided inside the exhaust pipes 29 to adjust and control the pressure inside the distribution cabinet 1 to ensure that the internal pressure is always maintained within a safe range. The outer walls of the exhaust pipes 29 are respectively provided with sealing covers 31, which can protect the exhaust pipes 29 from external dust and moisture.

[0027] Specifically, a pressure sensor 32 and a gas detector 33 are provided inside the cabinet. By installing the pressure sensor 32 and the temperature sensor 33, the pressure and temperature inside the cabinet can be monitored in real time. Once abnormal pressure or excessive temperature is found, the internal environment of the distribution cabinet 1 can be monitored and adjusted in real time through the intelligent regulation of the PLC control system.

[0028] The working principle of this embodiment is as follows: During actual use, the pressure sensor 32 will continuously monitor the pressure state inside the distribution cabinet 1. Once it finds that the pressure inside the cabinet is too low, it will immediately send a signal to the connected PLC control system. After receiving the signal, the PLC control system will respond quickly, control the one-way air intake valve 28 to open, and start the fan 12. After the fan 12 is started, it starts to inhale external air through the air inlet 4 of the air inlet device 2. The air will first pass through the dust cover 5 for preliminary dust filtration, and then enter the filter bin 7 inside the box 3 for more refined filtration to ensure that the air entering the distribution cabinet 1 is clean. The filtered clean air then enters the air supply duct 25 through the air outlet end 14, and is evenly guided and dispersed to the distribution cabinet 1 by the air guide duct 26 and the air outlet 27. Every corner inside provides a uniform and clean working environment for the electrical components. When the electrical components generate heat during operation, the heat will be transmitted to the inside of the heat exchange box 9. If the temperature sensor 33 detects that the temperature inside the cabinet is too high, the PLC control system will immediately start the circulation pump 23 and the blower 21. The circulation pump 23 pumps the low-temperature liquid in the cooling pipe 10 into the heat exchange box 9 through the liquid inlet pipe 22. After the liquid absorbs heat in the heat exchange box 9, the temperature rises and then returns to the cooling pipe 10 through the liquid outlet pipe 24, forming a circulating cooling system. At the same time, the blower 21 will blow air to the cooling pipe 10 in the support box 11 to speed up the heat dissipation. If the pressure inside the distribution cabinet 1 is too high, the exhaust valve 30 in the exhaust pipe 29 will automatically open to release excess gas to ensure the pressure balance inside the cabinet.

[0029] The utility model can also circulate and replace the gas in the distribution cabinet 1 regularly as needed. Specifically, the PLC control system program is set to regularly control the one-way air intake valve 28 to open, and start the fan 12 to suck new air into the distribution cabinet 1 under negative pressure, and at the same time control the exhaust valve 30 to open. After the fan 12 has worked for a period of time, the exhaust valve 30 is closed, and the fan 12 continues to suck air into the distribution cabinet 1 until the set time is reached. At this time, the one-way air intake valve 28 is controlled to be closed and the fan 12 is stopped.

[0030] The remaining parts not described in this utility model are existing or known technologies.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ventilation mechanism for a positive pressure explosion-proof distribution cabinet, characterized in that: The invention comprises a power distribution cabinet (1), wherein an air inlet device (2) is arranged on the top of the power distribution cabinet (1), wherein the air inlet device (2) comprises a box (3) arranged on the top of the power distribution cabinet (1), wherein an air inlet (4) is provided on the side of the box (3), wherein a dust cover (5) is provided on the outside of the air inlet (4), wherein the bottom of the box (3) is connected to the inside of the power distribution cabinet (1) through a through hole (6) provided on the top of the power distribution cabinet (1), wherein a filter compartment (7) is arranged inside the box (3), and wherein a heat dissipation device (8) is arranged at the bottom of the inside of the power distribution cabinet (1), wherein the heat dissipation device (8) is composed of a heat exchange box (9), a cooling pipe (10) and a support box (11), and is used to reduce the heat generated by the electrical components in the cabinet during long-term use.

2. The ventilation mechanism of a positive pressure explosion-proof distribution cabinet according to claim 1 is characterized in that: A fan (12) is installed inside the box (3); an air inlet end (13) of the fan (12) is connected to a filter bin (7); a one-way air inlet valve (28) is arranged inside the air inlet end (13); an air outlet end (14) of the fan (12) is sealedly connected to a through hole (6) at the top of the power distribution cabinet (1) via a sealing ring (15); the filter bin (7) comprises a filter screen (16) and a mounting frame (17); mounting grooves (18) are recessed on both sides of the mounting frame (17); a filter screen (16) is slidably connected inside the mounting groove (18); a handle (19) is installed on the outside of the filter screen (16); and a cover door (20) is hingedly connected to the outer side of the box (3) via a hinge.

3. The ventilation mechanism of a positive pressure explosion-proof distribution cabinet according to claim 1 is characterized in that: The heat exchange box (9) is installed at the bottom of the power distribution cabinet (1), and a support box (11) is arranged above the heat exchange box (9). A cooling pipe (10) and a blower (21) are installed in the support box (11). A liquid inlet pipe (22) is installed at one end of the cooling pipe (10), and the liquid inlet pipe (22) is connected to the liquid inlet end of a circulation pump (23) arranged outside the heat exchange box (9). The liquid outlet end of the circulation pump (23) is connected to the heat exchange box (9). A liquid outlet pipe (24) is installed on the outer wall of the heat exchange box (9) away from the circulation pump (23), and one end of the liquid outlet pipe (24) extends to the inside of the cooling pipe (10).

4. The ventilation mechanism of a positive pressure explosion-proof distribution cabinet according to claim 2 is characterized in that: The air outlet end (14) passes through the power distribution cabinet (1) and is connected to the air supply pipe (25); an air guide pipe (26) is installed on the inner wall of the power distribution cabinet (1); the air supply pipe (25) is connected to the air guide pipe (26); and a plurality of air outlets (27) are provided on the wall of the air guide pipe (26).

5. The ventilation mechanism of a positive pressure explosion-proof distribution cabinet according to claim 1, characterized in that: Exhaust pipes (29) are arranged at the bottom ends of both sides of the power distribution cabinet (1), one-way exhaust valves (30) are arranged inside the exhaust pipes (29), and sealing covers (31) are respectively mounted on the outer walls of the exhaust pipes (29).

6. The ventilation mechanism of a positive pressure explosion-proof distribution cabinet according to claim 1, characterized in that: A pressure sensor (32) and a temperature sensor (33) are arranged inside the cabinet.

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