An outdoor protection type electric appliance cabinet applied to a power system

Abstract

The application relates to the technical field of electric appliance cabinets, and discloses an outdoor protection type electric appliance cabinet applied to a power system, which comprises an electric appliance cabinet main body, a bottom box fixedly installed at the bottom of the electric appliance cabinet main body, a plurality of gas tanks arranged in the bottom box, a plurality of air injection pipes arranged on the cabinet door of the electric appliance cabinet main body, a gas conveying pipe jointly connected between the plurality of gas tanks and the plurality of air injection pipes, a sealing assembly arranged on the inner wall of the electric appliance cabinet main body at a ventilation opening, and drive mechanisms arranged at the two ends of one of the air injection pipes, wherein the drive mechanisms are used for driving a baffle to rotate to seal the ventilation hole. While the air injection pipes inject inert gas into the cabinet body, the gas pressure drives the connecting rod to ascend to release the limit of the baffle, the baffle rotates downward to seal the ventilation opening, the ventilation hole is sealed, the oxygen in the cabinet body is diluted by the inert gas to a concentration that cannot burn, and the fire extinguishing efficiency and reliability are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of electrical cabinet technology, and in particular to an outdoor protective electrical cabinet for use in power systems. Background Technology

[0002] Outdoor protective electrical cabinets, as key infrastructure of the power system, shoulder the important responsibilities of power distribution, protection, control and monitoring. Their core function is to build a barrier for the internal precision electrical equipment, resist the invasion of harsh outdoor environments, and thus ensure the continuity of power supply and the stable operation of the system.

[0003] Faulty electrical equipment inside the cabinet, such as short circuits, overloads, poor connections, and electric arcs, are major sources of fire risk. Therefore, outdoor electrical cabinets are generally equipped with fire suppression systems for protection. Currently, some outdoor electrical cabinets use inert gas fire suppression systems. While this system has the advantage of being clean, it has the following drawbacks in outdoor applications:

[0004] The principle of inert gas fire suppression is to smother the fire by diluting the oxygen concentration below the level that supports combustion (usually to about 12%-15%). This extinguishing concentration must be maintained for a sufficient time (generally more than 10-20 minutes) to ensure the flame is completely extinguished and reignition is prevented. However, any significant leak will cause the oxygen concentration inside the cabinet to rise rapidly, leading to fire suppression failure. Although existing distribution cabinets can seal the gaps in the cabinet doors and cable inlets and outlets, the high heat generated by the equipment inside usually requires ventilation openings for forced or natural cooling. These openings allow inert gas to escape outside the cabinet, while outside oxygen can re-enter, increasing the possibility of reignition of electrical components. Sealing these openings would severely affect the temperature control inside the cabinet, causing equipment overheating failures. Summary of the Invention

[0005] Given that existing technologies have problems such as poor cabinet sealing when using inert gas to extinguish fires, making it difficult to maintain a sealed effect inside the cabinet for a long time and increasing the probability of reignition of electrical components, an outdoor protective electrical cabinet for power systems is proposed.

[0006] Its purpose is to use the power generated when inert gas is injected to drive the sealing component, which closes the component and blocks the ventilation opening of the cabinet, keeping the cabinet in a sealed state for a long time, preventing oxygen from entering and improving the fire extinguishing effect.

[0007] The technical solution of the present invention is an outdoor protective electrical cabinet for use in power systems, comprising an electrical cabinet body, a base box fixedly installed at the bottom of the electrical cabinet body, and multiple gas cylinders disposed in the base box, the gas cylinders containing compressed inert gas, multiple air jet pipes disposed on the cabinet door of the electrical cabinet body, the multiple gas cylinders and the multiple air jet pipes being connected by a gas supply pipe, a sealing component disposed on the inner wall of the electrical cabinet body at the ventilation opening, the sealing component comprising a fixed frame fixedly connected to the inner wall of the electrical cabinet body, multiple partitions being rotatably connected within the fixed frame, and a driving mechanism disposed at both ends of one of the air jet pipes, the driving mechanism being used to drive the partitions to rotate and close the ventilation opening;

[0008] The drive mechanism includes an L-shaped tube communicating with the jet pipe and a connecting rod vertically slidably connected to the inner wall of the main body of the electrical cabinet. A top rod is vertically slidably connected inside the L-shaped tube. A piston plate is fixedly connected to the lower end of the top rod. A fixing cylinder is provided above the top rod. The fixing cylinder is connected and fixed to the connecting rod. The connecting rod is used to limit the position of the partition.

[0009] Furthermore, the gas supply pipe includes a flexible hose, both ends of which are fixedly connected to a fixed pipe. One of the fixed pipes is connected to the gas tank, and the other fixed pipe is connected to the jet pipe.

[0010] Furthermore, a solenoid valve is installed on the fixed pipe connected to the gas tank, a flame sensor and a smoke sensor are installed on the cabinet door of the main body of the electrical cabinet, and a power supply box is installed in the bottom box. The solenoid valve, flame sensor and smoke sensor are all linearly connected to the power supply box.

[0011] Furthermore, louvers are installed on both symmetrical side walls of the base box.

[0012] Furthermore, the jet pipe is horizontally fixedly installed on the cabinet door, and the jet pipe has multiple air holes axially spaced at equal intervals on one side facing the interior of the electrical cabinet body, and the multiple jet pipes are vertically distributed at equal intervals.

[0013] Furthermore, the multiple partitions are vertically and equally spaced, and a fixing rod is fixedly connected to the side of the partition facing the connecting rod. The fixing frame has a notch that matches the fixing rod.

[0014] Multiple inclined limiting blocks are fixedly connected to one side wall of the connecting rod facing the fixed frame. The multiple limiting blocks are distributed laterally symmetrically and staggered. The fixed rod abuts against the corresponding limiting block.

[0015] Furthermore, a rectangular plate is fixedly connected to the side of the fixed frame facing the ventilation hole, and a sealing gasket is provided on the side of the rectangular plate facing the partition.

[0016] Furthermore, a fixed seat is movably sleeved on the outer wall of the fixed cylinder, and the fixed seat is fixedly connected to the inner wall of the main body of the electrical cabinet. A through hole is opened on the fixed cylinder, and a limit rod is rotatably connected to the through hole. A counterweight is fixedly connected to the lower end of the limit rod, and the upper end of the limit rod has a bent structure and extends to the outside of the fixed cylinder.

[0017] Furthermore, an air guide shroud is movably sleeved on the outer wall of the jet pipe. The air guide shroud has a V-shaped cross-section. Rotating rings are fixed at both ends of the air guide shroud along the axial direction. A positioning ring is fixedly sleeved at the end of the outer wall of the jet pipe. A protrusion is fixed on the side of the rotating ring facing the positioning ring. A positioning groove that matches the protrusion is opened on the positioning ring.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. While the jet nozzle injects inert gas into the cabinet, the air pressure drives the connecting rod to rise and remove the limit on the partition, causing the partition to rotate downwards to block the ventilation opening. In the initial stage when the gas tank pressure is high, the connecting rod remains suspended, allowing oxygen in the cabinet to escape to the outside through the gaps in the sealing components along with the inert gas, reducing the oxygen concentration in the cabinet. Subsequently, when the gas tank pressure decreases, the connecting rod descends, causing the partition to come into tight contact with the sealing gasket, achieving complete sealing of the ventilation opening. The oxygen in the cabinet is diluted by the inert gas to a non-combustible concentration, significantly improving fire extinguishing efficiency and reliability.

[0020] 2. The counterweight and the limit rod work together to limit the movement of the fixed cylinder, preventing the connecting rod from rising accidentally due to the shaking of the cabinet caused by external force, thereby preventing the sealing component from closing unexpectedly, ensuring the linkage stability between the sealing component and the drive mechanism, and ensuring normal heat dissipation inside the cabinet.

[0021] 3. When the gas is injected through the jet pipe, it causes the gas guide to swing from bottom to top, so that the gas mixes inside the gas guide and evenly covers the surface of all electrical components and the gaps between electrical components, eliminating blind spots and achieving effective suppression of fire by the initial inert gas. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the internal structure of the electrical cabinet body of the present invention;

[0024] Figure 3 This is a schematic diagram of the internal structure of the bottom box of the present invention;

[0025] Figure 4 This is a schematic diagram of the cabinet door and air jet pipe structure of the main body of the electrical cabinet of the present invention;

[0026] Figure 5 This is a schematic diagram of the drive mechanism and enclosed component structure of the present invention;

[0027] Figure 6 This is a schematic diagram showing the disassembled structure of the closed component of the present invention;

[0028] Figure 7 This is a schematic cross-sectional view of the drive mechanism structure of the present invention;

[0029] Figure 8 This is a schematic diagram of the limiting block and fixing rod structure of the present invention.

[0030] Figure 9 This is a schematic cross-sectional view of the fixed cylinder structure of the present invention;

[0031] Figure 10 This is a schematic diagram of the jet pipe and air guide shroud structure of the present invention;

[0032] Figure 11 This is a schematic diagram of the connection structure between the fixed pipe and the jet pipe of the present invention;

[0033] Figure 12 This is a schematic diagram of the limiting block and fixing rod structure of the present invention from another perspective.

[0034] In the picture:

[0035] 1. Electrical cabinet body; 2. Base box; 3. Gas tank; 4. Gas supply pipe; 41. Hose; 42. Fixing pipe; 5. Solenoid valve; 6. Jet pipe; 7. Sealing assembly; 71. Fixing frame; 72. Partition plate; 73. Fixing rod; 74. Rectangular plate; 8. Drive mechanism; 81. L-shaped tube; 82. Top rod; 83. Piston plate; 84. Connecting rod; 85. Fixing cylinder; 86. Limiting block; 9. Fixing seat; 10. Limiting rod; 11. Counterweight; 12. Air guide hood; 13. Rotating ring; 14. Protrusion; 15. Positioning ring; 16. Positioning groove. Detailed Implementation

[0036] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0037] Example 1, referring to Figures 1-7This is the first embodiment of the present invention, providing an outdoor protective electrical cabinet for use in power systems. The cabinet includes a main body 1, a base box 2 fixedly mounted at the bottom of the main body 1, and multiple gas cylinders 3 housed within the base box 2. The gas cylinders 3 contain compressed inert gas. Multiple air jet pipes 6 are installed on the cabinet door of the main body 1. A gas supply pipe 4 connects the multiple gas cylinders 3 and the multiple air jet pipes 6. A sealing component 7 is installed on the inner wall of the main body 1 at the ventilation opening. The sealing component 7 includes a fixing frame 71 fixedly connected to the inner wall of the main body 1. Multiple partitions 72 are rotatably connected inside the fixed frame 71. One of the jet pipes 6 has a drive mechanism 8 at both ends. The drive mechanism 8 is used to drive the partition 72 to rotate and close the ventilation hole. The drive mechanism 8 includes an L-shaped pipe 81 that communicates with the jet pipe 6 and a connecting rod 84 that is vertically slidably connected to the inner wall of the electrical cabinet body 1. A top rod 82 is vertically slidably connected inside the L-shaped pipe 81. A piston plate 83 is fixedly connected to the lower end of the top rod 82. A fixed cylinder 85 is provided above the top rod 82. The fixed cylinder 85 is connected and fixed to the connecting rod 84. The connecting rod 84 is used to limit the position of the partition 72.

[0038] Specifically, when a fire occurs inside the main body 1 of the electrical cabinet, the gas cylinder 3 releases compressed inert gas. This gas is delivered to each jet pipe 6 via the gas supply pipe 4 and sprayed evenly to quickly extinguish the fire on the electrical components inside the cabinet. Simultaneously, the inert gas in one of the jet pipes 6 flows into the connected L-shaped pipe 81. The gas pressure in the L-shaped pipe 81 pushes the piston plate 83 upward, causing the push rod 82 to lift the fixed cylinder 85, which in turn causes the connecting rod 84 to rise vertically. After the connecting rod 84 rises, it releases the restriction on the partition 72, which rotates naturally under its own weight until it fits tightly against the fixed frame 71, thus quickly sealing the ventilation holes of the cabinet and creating a relatively sealed space inside the main body 1 of the electrical cabinet. In this sealed environment, the inert gas continuously accumulates and dilutes the oxygen concentration, eventually reducing the oxygen content inside the cabinet to a level where the flame cannot sustain combustion, achieving complete fire extinguishing.

[0039] By linking fire extinguishing and sealing actions, it can both extinguish fires directly using inert gas and prevent external oxygen replenishment by quickly sealing the cabinet, significantly improving fire extinguishing efficiency and reliability; by using gas pressure to drive the mechanical structure, no additional power source is required, simplifying the device structure while ensuring a fast response in emergency situations.

[0040] Reference Figure 3 , Figure 4 and Figure 11 The gas supply pipe 4 includes a hose 41, with fixed pipes 42 fixedly connected to both ends of the hose 41. One fixed pipe 42 is connected to the gas tank 3, and the other fixed pipe 42 is connected to the jet pipe 6.

[0041] Specifically, the hose 41 is designed to adapt to the positional changes of the cabinet door when it is opened and closed, so that the gas supply pipe 4 is always connected to the gas tank 3 and the jet pipe 6.

[0042] Reference Figure 3 A solenoid valve 5 is installed on the fixed pipe 42 connected to the gas tank 3. A flame sensor and a smoke sensor are installed on the cabinet door of the main body 1 of the electrical cabinet. A power supply box is installed in the bottom box 2. The solenoid valve 5, the flame sensor, and the smoke sensor are all linearly connected to the power supply box.

[0043] Specifically, the power supply box is used to work with the flame sensor and smoke sensor to monitor the cabinet in real time. When the flame sensor detects a fire or the smoke sensor detects smoke, it transmits a signal to the power supply box. The power supply box controls the solenoid valve 5 to open, so that the inert gas in the gas tank 3 is discharged into the gas supply pipe 4.

[0044] The flame sensor detects the presence of an open flame inside the cabinet by detecting infrared light of a specific wavelength, while the smoke sensor detects the presence of smoke inside the cabinet by detecting particulate matter concentration. The power supply box includes a battery and a control module. The control module is connected to the battery via wires and provides power to the flame sensor, smoke sensor, and solenoid valve 5 via wires. If there is an open flame inside the cabinet, the flame sensor will capture the characteristic spectrum of the flame, triggering a "fire signal" in the internal circuit, which is then transmitted to the control module via a signal line. If smoke is generated inside the cabinet (without an open flame but with signs of combustion), the smoke sensor will trigger a "smoke signal" due to excessive particulate matter concentration, which is transmitted to the control module via a signal line. When the control module receives either signal, it immediately outputs drive power to the solenoid valve 5, causing the gas tank 3 to open.

[0045] Understandably, using a self-contained independent power supply to power the solenoid valve 5, flame sensor, and smoke sensor effectively avoids power outages caused by short circuits or other malfunctions within the cabinet, ensuring these critical devices can still operate normally in emergencies. Simultaneously, this independent battery can be connected to the cabinet's internal power supply, continuously charging it to keep it fully charged. Even when the cabinet's power supply is unavailable, the battery itself has the capacity to provide power for extended periods, further guaranteeing system reliability.

[0046] In addition, the control module is equipped with a wireless signal transmission module. When the control module triggers the opening of solenoid valve 5, it simultaneously sends a signal to the base station through this wireless signal transmission module. This allows nearby patrol personnel to receive fire information in a timely manner and quickly arrive at the scene to handle subsequent fire-related matters, thereby improving the efficiency of emergency response.

[0047] Reference Figure 2 Louvers are installed on both symmetrical side walls of the bottom box 2.

[0048] Specifically, the louvers allow air to circulate between the bottom chamber 2 and the outside, preventing the pressure in the gas tank 3 from rising due to high temperature buildup inside. This not only ensures the safe use of the gas tank 3 but also adds another layer of protection for the stable operation of the entire equipment.

[0049] Reference Figure 4 , Figure 10 The jet pipe 6 is horizontally fixed on the cabinet door. The jet pipe 6 has multiple air holes axially spaced at equal intervals on one side facing the inside of the electrical cabinet body 1, and the multiple jet pipes 6 are vertically spaced at equal intervals.

[0050] Specifically, the six air holes of the jet pipe are set facing the inside of the cabinet. When the inert gas is sprayed out through the air holes, it can quickly reach the surface of the electrical components, which greatly shortens the fire extinguishing response time, realizes rapid and efficient suppression of the fire, and effectively reduces the losses caused by the fire.

[0051] Understandably, referring to Figure 4 By installing the jet pipe 6 on the inner wall of the cabinet door, it is possible to avoid encroaching on the internal space of the cabinet. At the same time, the jet pipe 6 is set to correspond to the mounting bracket of the electrical components, so that the inert gas sprayed by the jet pipe 6 is directed at the electrical components. This allows the inert gas to cover the surface of the electrical components to the maximum extent, quickly diluting the oxygen in the ignition point area, thereby effectively controlling the spread of the fire in the early stage of the fire.

[0052] Reference Figures 5-8 Multiple partitions 72 are vertically and equally spaced. A fixing rod 73 is fixedly connected to the side of the partition 72 facing the connecting rod 84. A notch adapted to the fixing rod 73 is opened on the fixing frame 71. Multiple inclined limiting blocks 86 are fixedly connected to the side wall of the connecting rod 84 facing the fixing frame 71. The multiple limiting blocks 86 are horizontally symmetrically and staggered. The fixing rod 73 abuts against the corresponding limiting block 86.

[0053] Specifically, the air pressure inside the L-shaped tube 81 pushes the piston plate 83 to rise, causing the top rod 82 to drive the connecting rod 84 connected to the fixed cylinder 85 to rise. At the same time, the limiting block 86, which is in contact with the fixed rod 73, rises synchronously and causes the partition plate 72 to rotate upward. When the fixed rod 73 rotates to the point where it loses contact with the limiting block 86, the partition plate 72 rotates downward under its own weight until it fits against the fixed frame 71, thereby sealing the ventilation hole.

[0054] Among them, reference Figure 12 , Figures 6-8When the top rod 82 is not in contact with the fixed cylinder 85, the connecting rod 84 is in its lowest position. At this time, the fixed rod 73 abuts against the upper inclined surface of the right limit block 86, restricting the downward rotation of the partition 72. The two adjacent partitions 72 are set in parallel, ensuring normal air exchange between the cabinet and the outside. When the air pressure in the L-shaped tube 81 pushes the piston plate 83 upward, causing the top rod 82 to drive the connecting rod 84 upward, the right limit block 86 will gradually release its contact with the fixed rod 73, and the fixed rod 73 will rotate into the corresponding notch. Subsequently, during the descent of the connecting rod 84, the lower inclined surface of the left limit block 86 will abut against the fixed rod 73, limiting the rotation of the partition 72, so that the partition 72 is stably connected to the fixed frame 71, thus sealing the ventilation hole. This structure can quickly block the airflow between the cabinet and the outside in the event of a fire, reducing the entry of oxygen. Combined with the release of inert gas, it further enhances the fire extinguishing effect. Under normal conditions, it can also ensure good air exchange and maintain a suitable environment inside the cabinet.

[0055] Reference Figure 6 A rectangular plate 74 is fixedly connected to the side of the fixed frame 71 facing the ventilation hole, and a sealing gasket is provided on the side of the rectangular plate 74 facing the partition 72.

[0056] Specifically, when the left limiting block 86 abuts against the fixing rod 73, the abutting force applied by the connecting rod 84 makes the partition 72 and the sealing gasket come into close contact, further improving the sealing effect and keeping the inside of the cabinet sealed for a long time, thus improving the fire extinguishing effect.

[0057] It should be noted that the total area of ​​the openings of all gas cylinders 3 is greater than the total area of ​​the air holes of all jet pipes 6. When the solenoid valve 5 is opened, the inert gas in the gas cylinder 3 will be completely ejected through the air holes after a certain period of time. During the initial stage of gas injection, due to the high gas pressure in the gas cylinder 3, the top rod 82 always drives the connecting rod 84 to remain in an elevated and suspended state. Subsequently, when the partition 72 rotates to contact the fixed frame 71, the gas inside the cabinet can escape to the outside through the gap between the partition 72 and the fixed frame 71. This design allows the original oxygen inside the cabinet to be quickly discharged along with the inert gas, causing the internal oxygen concentration to decrease rapidly. Subsequently, when the gas pressure in the gas cylinder 3 decreases, the connecting rod 84 descends, causing the partition 72 to come into close contact with the sealing gasket, keeping the cabinet sealed. At this time, the inert gas dilutes the oxygen to a concentration that cannot be burned.

[0058] Example 2, refer to Figure 7 , Figure 9 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that: a fixed seat 9 is movably sleeved on the outer wall of the fixed cylinder 85, the fixed seat 9 is fixedly connected to the inner wall of the electrical cabinet body 1, a through hole is opened on the fixed cylinder 85, a limit rod 10 is rotatably connected to the through hole, a counterweight 11 is fixedly connected to the lower end of the limit rod 10, and the upper end of the limit rod 10 has a bent structure and extends to the outside of the fixed cylinder 85.

[0059] Specifically, under the gravity of the counterweight 11, the upper end of the limiting rod 10 will abut against the bottom surface of the fixed base 9. At this time, the fixed cylinder 85 is restricted from rising, thus effectively limiting the rise of the connecting rod 84. This design can prevent the connecting rod 84 from rising accidentally due to the shaking of the cabinet caused by external forces, thereby preventing the sealing component 7 from closing unexpectedly and ensuring normal heat dissipation inside the cabinet. When the top rod 82 is inserted into the fixed cylinder 85, the upper end of the top rod 82 will push the counterweight 11, causing the upper end of the limiting rod 10 to retract into the fixed cylinder 85, releasing the restriction on the fixed cylinder 85. At this time, the connecting rod 84 can move freely vertically.

[0060] The aforementioned mechanical structure enables precise limiting and unlocking of the connecting rod 84, preventing accidental operation under unnecessary circumstances, ensuring the stability of the cabinet's heat dissipation function, and reliably releasing the restriction when needed, ensuring the normal operation of the enclosed component 7, and improving the safety and reliability of equipment operation. The remaining structures are the same as those in Embodiment 1.

[0061] Example 3, referring to Figure 10 This is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that: an air guide shroud 12 is movably sleeved on the outer wall of the jet pipe 6. The air guide shroud 12 has a V-shaped cross-section. Rotating rings 13 are fixed at both ends of the air guide shroud 12 along the axial direction. A positioning ring 15 is fixedly sleeved at the end of the outer wall of the jet pipe 6. A protrusion 14 is fixed on the side of the rotating ring 13 facing the positioning ring 15. A positioning groove 16 that matches the protrusion 14 is opened on the positioning ring 15.

[0062] Specifically, the gas ejected from the nozzle 6 is gathered by the gas guide shroud 12 and then evenly sprayed out through the opening, allowing the inert gas to more evenly cover the surface of each electrical component. Simultaneously, with the cooperation of the protrusion 14 and the positioning groove 16, the gas guide shroud 12 has a certain amount of rotational space. Under its own gravity, the opening of the gas guide shroud 12 is tilted downwards; as gas is ejected from the nozzle, the flowing gas gradually drives the gas guide shroud 12 to rotate upwards, thus achieving automatic upward swinging of the gas guide shroud 12. Through the gathering and swinging action of the gas guide shroud 12, the uniformity of the inert gas injection is improved, its coverage area is expanded, and dead zones are effectively eliminated, thereby accelerating the dilution efficiency of the oxygen concentration and improving the fire resistance of the equipment.

[0063] In this embodiment, the air vent of the jet pipe 6 faces one side of the cabinet and is inclined upwards. When gas is ejected from the air vent, the flowing gas gradually overcomes the friction between the air guide shroud 12 and the jet pipe 6, causing the air guide shroud 12 to slowly rotate upwards. The rest of the structure is the same as that of Embodiment 2.

[0064] Based on embodiments 1-3, the working principle of this invention is as follows: When the flame sensor detects a fire inside the cabinet or the smoke sensor detects smoke inside the cabinet, the solenoid valve 5 and the gas tank 3 release compressed inert gas, which is sent to the jet pipe 6 through the gas supply pipe 4 and sprayed out from the gas hole to extinguish the fire. At the same time, some gas flows into the L-shaped pipe 81, pushing the piston plate 83 and the push rod 82 to rise, causing the connecting rod 84 to move upward and release the restriction on the partition 72. Under its own weight, the partition 72 rotates to close the ventilation hole. In the initial stage of gas injection, the original oxygen in the cabinet is discharged from the gaps with the gas; after the gas pressure in the gas tank 3 decreases, the connecting rod 84 descends, and the partition 72 is in close contact with the sealing gasket to maintain a seal. The inert gas continues to dilute the oxygen to the extinguishing concentration.

[0065] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An outdoor protective electrical cabinet applied to a power system, comprising an electrical cabinet main body (1), a bottom box (2) is fixedly installed at the bottom of the electrical cabinet main body (1), characterized in that, Also include a plurality of gas tank (3) is arranged in the bottom box (2), the gas tank (3) is filled with compressed inert gas, the cabinet door of the electric appliance cabinet body (1) is provided with a plurality of gas injection pipe (6), a plurality of gas tank (3) and a plurality of gas injection pipe (6) are connected with gas pipe (4), the electric appliance cabinet body (1) is located at the inner wall of the ventilation opening is provided with a closed assembly (7), the closed assembly (7) includes a fixed frame (71) fixedly connected with the inner wall of the electric appliance cabinet body (1), a plurality of partitions (72) are rotatably connected in the fixed frame (71), one end of one of the gas injection pipe (6) is provided with a driving mechanism (8), the driving mechanism (8) is used for driving the partition (72) to rotate and make the ventilation hole closed, a plurality of the partition (72) is vertically and equidistantly distributed, the side of the partition (72) towards the connecting rod (84) is fixedly connected with a fixed rod (73), the fixed frame (71) is provided with a notch matched with the fixed rod (73), the side wall of the connecting rod (84) towards the fixed frame (71) is fixedly connected with a plurality of limiting blocks (86) arranged obliquely, a plurality of the limiting blocks (86) are horizontally symmetrically and staggeredly distributed, the fixed rod (73) is in abutment with the corresponding limiting block (86). The driving mechanism (8) includes an L-shaped pipe (81) communicated with the gas injection pipe (6), and a connecting rod (84) vertically and slidably connected to the inner wall of the electric appliance cabinet body (1), a top rod (82) is vertically and slidably connected in the L-shaped pipe (81), a piston plate (83) is fixedly connected to the lower end of the top rod (82), a fixed cylinder (85) is arranged above the top rod (82), the fixed cylinder (85) is connected with the connecting rod (84), the connecting rod (84) is used for limiting the partition (72), a fixed seat (9) is movably sleeved on the outer wall of the fixed cylinder (85), the fixed seat (9) is fixedly connected to the inner wall of the electric appliance cabinet body (1), a through hole is formed in the fixed cylinder (85), a limiting rod (10) is rotatably connected to the through hole, a counterweight (11) is fixedly connected to the lower end of the limiting rod (10), the upper end of the limiting rod (10) is bended and extends to the outside of the fixed cylinder (85). The outer wall of the gas injection pipe (6) is movably sleeved with a gas guide cover (12), the cross section of the gas guide cover (12) is V-shaped structure, rotating rings (13) are fixedly arranged at the axial ends of the gas guide cover (12), a positioning ring (15) is fixedly sleeved on the outer wall of the gas injection pipe (6), protrusions (14) are fixedly arranged on the side of the rotating ring (13) towards the positioning ring (15), positioning grooves (16) matched with the protrusions (14) are formed in the positioning ring (15).

2. The outdoor protective electrical cabinet for use in a power system according to claim 1, characterized in that, The gas pipe (4) includes a hose (41), the both ends of the hose (41) are fixedly connected with fixed pipes (42), one of the fixed pipes (42) is communicated with the gas tank (3), the other fixed pipe (42) is communicated with the gas injection pipe (6).

3. The outdoor protective electrical cabinet for use in a power system according to claim 2, characterized in that, An electromagnetic valve (5) is arranged on a fixed pipe (42) in communication with the gas tank (3), a flame sensor and a smoke sensor are installed on the cabinet door of the electric cabinet body (1), a power supply box is installed in the bottom box (2), and the electromagnetic valve (5), the flame sensor and the smoke sensor are linearly connected with the power supply box.

4. The outdoor protective electrical cabinet for power system according to claim 1, characterized in that, Both sides of the bottom box (2) are symmetrically provided with louvers.

5. The outdoor protective electrical cabinet for power system according to claim 1, characterized in that, The jet pipes (6) are transversely fixedly installed on the cabinet door, a plurality of air holes are axially and equidistantly arranged on one side of the jet pipe (6) facing the inside of the electric cabinet body (1), and a plurality of jet pipes (6) are vertically and equidistantly distributed.

6. The outdoor protective electrical cabinet for power system according to claim 1, characterized in that, The fixed frame (71) is fixedly connected with a rectangular plate (74) on the side facing the air vent, and the rectangular plate (74) is provided with a sealing gasket on the side facing the partition plate (72).

Images