Intelligent switch cabinet with automatic pressure relief protection function

Abstract

The invention discloses an intelligent switch cabinet with automatic pressure relief protection, which comprises a cabinet body, a cabinet door is hinged to the front surface of the cabinet body, a heat dissipation channel is fixed on the back surface of the cabinet body, and a motor and a heat dissipation fan are respectively mounted in the heat dissipation channel; first pressure relief openings are formed in the upper portions of the left side and the right side of the cabinet body, blocking plates are arranged on the two sides of the cabinet body and located below the first pressure relief openings, and a second pressure relief opening is formed in the top of the cabinet body. According to the intelligent switch cabinet with the automatic pressure relief protection function, the first pressure relief opening and the second pressure relief opening can be gradually opened according to the pressure of the cabinet body, so that high-pressure gas is rapidly exhausted, graded pressure relief can be performed, pressure is released gently, pressure fluctuation is reduced, and the stability of a system is improved; and high-pressure gas can be discharged in the direction of the plugging plate in the inclined state, so that the gas is prevented from directly impacting surrounding personnel or equipment during pressure relief, and the safety risk is reduced.

Description

Technical Field

[0001] The present invention relates to the field of switch cabinets, and in particular to an intelligent switch cabinet with autonomous pressure relief protection. Background Art

[0002] The intelligent switch cabinet is a new type of switch cabinet that integrates advanced sensor technology, control technology, communication technology and intelligent software. It can realize the functions of status monitoring, fault diagnosis, automatic control and information interaction of electrical equipment in the switch cabinet; Defect 1: The existing intelligent switch cabinet usually uses a pressure relief valve to relieve pressure when in use. After long-term use, the spring elasticity of the pressure relief valve will become loose, resulting in failure to properly relieve pressure or affecting the sealing of the switch cabinet. In addition, if a spring with too high strength is used during use, it will affect the pressure relief of the pressure relief valve; In order to solve the defect 1, the existing technology (application number: 202122062234.7, authorization announcement date is 20 The Chinese patent of 22-03-22 discloses an intelligent switch cabinet with pressure relief protection function. Through the designed nut and screw, the screw is driven to rotate by a motor during use, and the screw drives the push rod to move in cooperation with the nut, so that the push rod drives the push plate to press on the guide rod. When the elastic force of the guide rod becomes smaller, the guide rod is pressed tightly to ensure that the blocking head is blocked on the pressure relief port; through the designed push ring, side spring and sliding block, when the pressure is released, the blocking head is forced to drive the sliding plate to slide up, and the push ring pushes the sliding block to compress on the side spring, and cooperates with the guide rod to assist in pushing the sliding plate, thereby avoiding the phenomenon that the elastic force of the guide rod becomes smaller and difficult to block, without changing the strength of the guide rod. The auxiliary sliding plate is placed under the switch cabinet to avoid the phenomenon that the pressure relief is affected by the use of a guide rod that is too strong; Defect 2: However, there are still some deficiencies in the existing switch cabinet. There is a lack of reliable leakage protection measures during its use. At the same time, its cabinet door takes up too much space and is inconvenient to fold, which affects the use and maintenance of equipment by personnel; In order to solve the second defect, the existing technology (application number: 202122890843.1, Chinese patent with authorization announcement date of 2022-04-19) discloses an intelligent switch cabinet with a protective pressure relief component. The protective leakage component ensures that the leakage will flow through the current along Line 2 through the metal drainage layer; the voltage detector and the ground wire interface enter the ground and are discharged to prevent them from directly interfering with the internal All electronic components work to avoid dangerous situations. At the same time, its current and voltage detectors detect current changes and cut off the power supply of the air switch through the circuit board to maintain stable cut-off of the equipment to prevent short circuit and leakage, which will damage personnel and equipment; the folding cabinet door assembly rotates the cabinet door to drive the turn block to rotate, so that the cabinet door can be aligned with the slot frame, and then the cabinet door is inserted into the slot frame, which can greatly save the space occupied by the cabinet door, facilitate personnel use and maintenance, and reduce the space obstruction of the cabinet door; the inner surface of the turn block is provided with a slide groove, and one end of the slide groove is provided with a groove, and the outer surface of the groove is slidably connected to a card block, which is fixedly connected to one end of the cabinet door to ensure that the cabinet door can slide, and is equipped with a limit card block to prevent damage.

[0003] In the existing technology, a single pressure relief method can usually only perform one-time pressure relief when the pressure reaches a certain threshold, and cannot be fine-tuned according to the actual pressure changes. At the same time, the pressure relief capacity of a single pressure relief device is limited. If the pressure that the system needs to release exceeds its maximum relief capacity, it will not be able to complete the pressure relief task in a timely and effective manner, which may cause the internal pressure of the switch cabinet to continue to rise, posing a safety hazard, and the direction of the pressure relief cannot be changed, so that when the switch cabinet is relieved, the gas directly impacts the surrounding personnel or equipment, increasing the safety risk. Therefore, we propose an intelligent switch cabinet with autonomous pressure relief protection to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide an intelligent switch cabinet with autonomous pressure relief protection to solve the problems mentioned in the above background technology, such as the inability to fine-tune the pressure changes according to the actual pressure changes by using a single pressure relief method, the limited pressure relief capacity, which may cause the pressure to continue to rise and bring safety hazards, and the inability to change the direction of the pressure relief, which may impact surrounding personnel or equipment and increase safety risks.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an intelligent switch cabinet with autonomous pressure relief protection, comprising a cabinet body, a cabinet door hinged on the front of the cabinet body, and a heat dissipation channel fixed to the back of the cabinet body, a motor and a cooling fan respectively installed inside the heat dissipation channel; a first pressure relief port is opened on the upper left and right sides of the cabinet body, and a sealing plate is provided on both sides of the cabinet body below the first pressure relief port, a second pressure relief port is opened on the top of the cabinet body, and a sealing block is provided inside the second pressure relief port, a pressure sensor is installed on the right bolt inside the cabinet body, a driven gear is fixed to the axial end of the sealing plate, a limit frame is fixed on the upper left and right sides of the interior of the cabinet body, and an air bag is provided on the inner wall of the limit frame, and a drive rack is slidably connected to the drive rack on both sides of the interior of the cabinet body below the drive rack.

[0006] Preferably, the bottom of the blocking plate is connected to the inside of the cabinet through an axial rotation, the driving rack is arranged in an "L" shape, and one end of the driving rack extends into the interior of the limit frame, and the side surface of one end of the driving rack is bonded to the outside of the airbag, and the driving rack and the driven gear are slidably connected.

[0007] Preferably, the heat dissipation fan is rotatably connected to the inside of the heat dissipation channel via a shaft, and the tail end of the heat dissipation fan is fixedly connected to the output end of the motor.

[0008] Preferably, a transmission rod is connected to the upper bearing of the heat dissipation channel on the back of the cabinet, and the bottom of the transmission rod is connected to the outer side of the cooling fan shaft end through a bevel gear set. A reciprocating screw is sleeved on the outer side of the upper end of the transmission rod, and a ratchet assembly is installed between the reciprocating screw and the transmission rod. A fixed rod is fixedly connected to the right side of the top of the cabinet, and a movable plate is sleeved on the outer sides of the fixed rod and the reciprocating screw.

[0009] Preferably, the bottom of the movable plate is fixedly connected to the top of the blocking block, and the blocking block is narrow at the bottom and wide at the top. The movable plate is threadedly connected to the reciprocating screw rod, and the movable plate is slidably connected to the fixed rod.

[0010] Preferably, the bottom of the transmission rod extends into the interior of the heat dissipation channel, and the reciprocating screw rod forms a one-way rotation structure through the transmission rod and the ratchet assembly.

[0011] Preferably, a fixed contact switch is fixed on the outer side of the upper end of the fixed rod, a movable contact switch is installed on the right bolt on the top of the movable plate, a buzzer alarm is connected to the right bolt on the top of the cabinet, and the positions of the fixed contact switch correspond to those of the movable contact switch.

[0012] Preferably, a pipeline is fixed above the inside of the cabinet, and nozzles are installed at equal intervals at the bottom of the pipeline. A storage box is fixed on the left side of the top of the cabinet, and the storage box and the pipeline are connected through a connecting pipe. A sealing plate is provided above the inside of the connecting pipe, and a return spring is installed between the right side of the sealing plate and the inner wall of the cabinet, and the sealing plate and the movable plate are connected by a traction rope.

[0013] Preferably, HFC-227ea fire extinguishing agent is stored inside the storage box, and both ends of the traction rope are fixedly connected between the right side of the sealing plate and the left side of the bottom of the movable plate.

[0014] Preferably, the right side of the sealing plate extends into the interior of the cabinet, and the sealing plate is in sliding connection with the cabinet and the connecting pipe.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the intelligent switch cabinet with autonomous pressure relief protection can gradually open the first pressure relief port and the second pressure relief port according to the cabinet pressure, so that the high-pressure gas is discharged quickly, thereby achieving graded pressure relief and relatively smooth pressure release, reducing pressure fluctuations and improving the stability of the system. Moreover, when the two blocking plates rotate outward, the high-pressure gas will be discharged along the direction of the blocking plates in the inclined state, avoiding the gas from directly impacting the surrounding personnel or equipment during pressure relief, thereby reducing safety risks. The specific contents are as follows:

[0016] (1) When the pressure inside the cabinet reaches a lower set value, the second pressure relief port will not open. At this time, the airbag expands due to the high-pressure gas and pushes the rack to move, so that the rack drives the meshing driven gear to rotate, and then the two blocking plates rotate outward and no longer block the first pressure relief port, so that the high-pressure gas is quickly discharged, thereby preventing the cabinet from exploding or deforming due to excessive internal pressure. When the pressure inside the cabinet reaches a higher set value, the motor drives the cooling fan to rotate in the opposite direction, and uses the bevel gear set to drive the transmission rod to rotate, so that the transmission rod uses the ratchet assembly to drive the reciprocating screw to rotate, and then the movable plate drives the blocking block to move upward and separate from the second pressure relief port, so that the second pressure relief port can be opened, thereby enabling graded pressure relief and relatively smooth pressure release, reducing pressure fluctuations and improving system stability.

[0017] (2) When the two sealing plates rotate outward, the high-pressure gas will be discharged along the direction of the inclined sealing plates, avoiding the gas from directly impacting the surrounding personnel or equipment during pressure release, thereby reducing safety risks; further, the heat dissipation fan is driven by the motor to rotate, which can quickly discharge the heat inside the cabinet from the heat dissipation channel, ensuring that the electrical components work in a stable temperature environment, improving their performance stability, reducing the probability of failure caused by overheating, and ensuring the reliable operation of the power system.

[0018] (3) When the movable plate drives the blocking block to move upward, it can drive the movable contact switch to move toward the fixed contact switch and make contact, which can automatically start the buzzer alarm to alert people around to stay away, thereby further improving safety.

[0019] (4) When the movable plate moves upward, the sealing plate is pulled by the traction rope so that it no longer blocks the connecting pipe. At this time, the HFC-227ea fire extinguishing agent in the storage box enters the pipeline through the connecting pipe and is sprayed into the cabinet from multiple nozzles, achieving pressure relief and fire extinguishing at the same time, thereby improving fire extinguishing efficiency, extinguishing the flames more quickly, and reducing damage to equipment caused by fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the main cross-sectional structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the rotating structure of the blocking plate of the present invention;

[0022] Figure 3 This is a schematic diagram of the three-dimensional structure of the cabinet and storage box of the present invention;

[0023] Figure 4 This is a schematic diagram of the connection structure of the pipeline, connecting pipe and storage box of the present invention;

[0024] Figure 5This is a schematic diagram of the three-dimensional structure of the blocking plate, limiting frame and airbag of the present invention;

[0025] Figure 6 Schematic diagram of the connection structure of the transmission rod, reciprocating screw rod and ratchet assembly of the present invention;

[0026] Figure 7 This is a schematic diagram of the connection structure between the movable plate and the reciprocating screw rod of the present invention;

[0027] Figure 8 For the present invention Figure 1 A in the middle is an enlarged structural diagram;

[0028] Figure 9 For the present invention Figure 1 The enlarged structural diagram at B in the middle;

[0029] Figure 10 It is a schematic diagram of the main cross-sectional structure of the reciprocating screw rod of the present invention.

[0030] In the figure: 1. Cabinet body; 2. Cabinet door; 3. Heat dissipation channel; 4. Cooling fan; 5. Pressure sensor; 6. Buzzer alarm; 7. Pipeline; 8. First pressure relief port; 9. Sealing plate; 10. Driven gear; 11. Limiting frame; 12. Airbag; 13. Drive rack; 14. Second pressure relief port; 15. Movable plate; 16. Reciprocating screw; 17. Transmission rod; 18. Fixed rod; 19. Fixed contact switch; 20. Movable contact switch; 21. Traction rope; 22. Connecting pipe; 23. Sealing plate; 24. Return spring; 25. Storage box; 26. Sealing block; 27. Ratchet assembly. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] See also Figures 1-10 , the present invention provides the following technical solutions: an intelligent switch cabinet with autonomous pressure relief protection;

[0033] Example 1: In order to solve the problems in the prior art of intelligent switch cabinets using a single pressure relief method that cannot be finely adjusted according to actual pressure changes, the limited pressure relief capacity easily causes the pressure to continue to rise and bring safety hazards, and the inability to change the direction of the pressure relief, which impacts the surrounding personnel or equipment and increases the safety risk, the following solution is disclosed. Figure 1-Figure 3 and Figure 5-Figure 8 and Figure 10As shown, it includes a cabinet body 1, a cabinet door 2 is hinged on the front of the cabinet body 1, and a heat dissipation channel 3 is fixed on the back of the cabinet body 1, a motor and a heat dissipation fan 4 are respectively installed inside the heat dissipation channel 3, the heat dissipation fan 4 is connected to the inside of the heat dissipation channel 3 through an axis rotation, and the tail end of the heat dissipation fan 4 is fixedly connected to the output end of the motor; a first pressure relief port 8 is opened above the left and right sides of the cabinet body 1, and a blocking plate 9 is provided on both sides of the cabinet body 1 below the first pressure relief port 8, and a second pressure relief port 14 is opened on the top of the cabinet body 1. A blocking block 26 is provided inside the second pressure relief port 14, a pressure sensor 5 is installed on the right bolt inside the cabinet 1, a driven gear 10 is fixed to the shaft end of the blocking plate 9, and a limit frame 11 is fixed above the left and right sides of the cabinet 1, and an air bag 12 is provided on the inner wall of the limit frame 11. The driving rack 13 is slidably connected to the lower side of the driving rack 13 on both sides of the cabinet 1. The bottom of the blocking plate 9 is connected to the inside of the cabinet 1 through an axis rotation. The driving rack 13 is set in an "L" shape, and the driving One end of the rack 13 extends into the interior of the limit frame 11, and the side surface of one end of the driving rack 13 is bonded to the outside of the airbag 12. The driving rack 13 and the driven gear 10 are in sliding connection. The upper bearing of the heat dissipation channel 3 on the back of the cabinet 1 is connected to a transmission rod 17, and the bottom of the transmission rod 17 is connected to the outer side of the shaft end of the cooling fan 4 through a bevel gear set. The outer side of the upper end of the transmission rod 17 is sleeved with a reciprocating screw 16, and a ratchet assembly 27 is installed between the reciprocating screw 16 and the transmission rod 17. A fixed rod 18 is fixedly connected to the right side of the top of the cabinet 1, and a movable plate 15 is sleeved on the outside of the fixed rod 18 and the reciprocating screw rod 16. The bottom of the movable plate 15 is fixedly connected to the top of the blocking block 26, and the blocking block 26 is set in a shape that is narrow at the bottom and wide at the top. The movable plate 15 and the reciprocating screw rod 16 are threadedly connected, and the movable plate 15 and the fixed rod 18 are slidingly connected. The bottom of the transmission rod 17 extends into the interior of the heat dissipation channel 3, and the reciprocating screw rod 16 forms a one-way rotation structure through the transmission rod 17 and the ratchet assembly 27.

[0034] When the pressure of the cabinet 1 increases due to a fault (such as a short circuit, electric arc, etc.), and the pressure sensor 5 is able to quickly and accurately sense the pressure change, and when the pressure reaches a lower set value, the second pressure relief port 14 will not open. At this time, the airbag 12 is expanded by the high-pressure gas and pushes the drive rack 13 to move, so that the drive rack 13 drives the meshing driven gear 10 to rotate, and then the two blocking plates 9 rotate outward and no longer block the first pressure relief port 8, so that the high-pressure gas is quickly discharged, thereby preventing the cabinet 1 from exploding or deforming due to excessive internal pressure. Dangerous situations, such as explosion, deformation, etc., then when the pressure inside the cabinet 1 reaches a higher set value, the pressure sensor 5 transmits a signal to the control system, and the control system processes and judges the pressure detection signal, controls the motor to drive the cooling fan 4 to rotate in the opposite direction, and uses the bevel gear group to drive the transmission rod 17 to rotate, so that the transmission rod 17 drives the reciprocating screw 16 to rotate through the ratchet assembly 27, and then the movable plate 15 drives the blocking block 26 to move upward and separate from the second pressure relief port 14. The second pressure relief port 14 can be opened to discharge the high-pressure gas, thereby enabling graded pressure relief and relatively smooth pressure release, reducing pressure fluctuations and improving the stability of the system. At the same time, when the two blocking plates 9 rotate outward, the high-pressure gas will be discharged along the direction of the tilted blocking plate 9, which can avoid the gas directly impacting the surrounding personnel or equipment during pressure relief, reducing safety risks. Then, when a large amount of heat accumulates inside the cabinet 1, the motor drives the cooling fan 4 to rotate, which can quickly discharge the heat inside the cabinet 1 from the heat dissipation channel 3, ensuring that the electrical components operate in a stable temperature environment, improving their performance stability, reducing the probability of failure caused by overheating, and ensuring the reliable operation of the power system. Finally, as the reciprocating screw 16 continues to rotate, the movable plate 15 drives the blocking block 26 to move downward and re-block the second pressure relief port 14. At the same time, the sealing plate 23 is reset under the elastic force of the reset spring 24, and the connecting pipe 22 is blocked, and the movable contact switch 20 is separated from the fixed contact switch 19, thereby turning off the buzzer alarm 6 for the next use.

[0035] Example 2: Different from Example 1, this embodiment drives the movable contact switch 15 to contact the fixed contact switch 19 20 through the movable plate 15, which can automatically start the buzzer alarm 6 to sound an alarm, thereby reminding the surrounding people to stay away, further improving safety. For specific reference Figure 1-Figure 3 and Figure 7 As shown, a fixed contact switch 19 is fixed to the outer side of the upper end of the fixed rod 18, a movable contact switch 20 is installed on the right bolt on the top of the movable plate 15, and a buzzer alarm 6 is connected to the right bolt on the top of the cabinet 1. The positions of the fixed contact switch 19 and the movable contact switch 20 correspond to each other.

[0036] When the movable plate 15 drives the blocking block 26 to move upward, it can drive the movable contact switch 20 to move toward the fixed contact switch 19 and make contact, the control circuit is turned on, the relay is energized, its normally open contact is closed, and the buzzer alarm 6 is automatically started to sound an alarm, thereby reminding people around to stay away and further improving safety.

[0037] Example 3: Different from Example 2, this example uses multiple nozzles on the pipe 7 to spray HFC-227ea fire extinguishing agent into the cabinet 1, which can achieve pressure relief and fire extinguishing at the same time, thereby improving fire extinguishing efficiency, extinguishing the flame more quickly, and reducing the damage to the equipment caused by the fire. For details, please refer to Figure 1 、 Figure 4 and Figure 9 As shown, a pipe 7 is fixed on the upper part of the interior of the cabinet 1, and nozzles are installed at equal intervals at the bottom of the pipe 7. A storage box 25 is fixed on the left side of the top of the cabinet 1, and the storage box 25 is communicated with the pipe 7 through a connecting pipe 22. A sealing plate 23 is provided on the upper part of the connecting pipe 22. The right side of the sealing plate 23 extends into the interior of the cabinet 1, and the sealing plate 23 is slidingly connected to the cabinet 1 and the connecting pipe 22. A return spring 24 is installed between the right side of the sealing plate 23 and the inner wall of the cabinet 1, and the sealing plate 23 is connected to the movable plate 15 by a traction rope 21. HFC-227ea fire extinguishing agent is stored in the storage box 25, and the two ends of the traction rope 21 are fixedly connected between the right side of the sealing plate 23 and the left side of the bottom of the movable plate 15 respectively.

[0038] When the movable plate 15 moves upward, the sealing plate 23 is pulled by the traction rope 21 so that it no longer blocks the connecting pipe 22. At this time, the HFC-227ea fire extinguishing agent in the storage box 25 enters the pipeline 7 through the connecting pipe 22 and is sprayed into the cabinet 1 from multiple nozzles, achieving pressure relief and extinguishing the fire at the same time, thereby improving the fire extinguishing efficiency, extinguishing the flames more quickly, and reducing the damage to the equipment caused by the fire. Then, when it is necessary to replenish the HFC-227ea fire extinguishing agent, the sealing cover on the storage box 25 is unscrewed with a tool. The sealing cover is separated from the charging port, and the HFC-227ea fire extinguishing agent is replenished into the storage box 25 through the charging port.

[0039] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An intelligent switch cabinet with autonomous pressure relief protection, comprising a cabinet body (1), a cabinet door (2) hingedly connected to the front of the cabinet body (1), and a heat dissipation channel (3) fixedly provided on the back of the cabinet body (1), wherein a motor and a heat dissipation fan (4) are respectively installed inside the heat dissipation channel (3); characterized in that: A first pressure relief port (8) is provided above both left and right sides of the cabinet (1), and a blocking plate (9) is provided below the first pressure relief port (8) on both sides of the cabinet (1). A second pressure relief port (14) is provided on the top of the cabinet (1), and a blocking block (26) is provided inside the second pressure relief port (14). A pressure sensor (5) is installed on the right bolt inside the cabinet (1), and a driven gear (10) is fixed to the shaft end of the blocking plate (9). A limit frame (11) is fixed above both left and right sides of the cabinet (1), and an air bag (12) is provided on the inner wall of the limit frame (11). A driving rack (13) is slidably connected to the driving rack (13) on both sides of the cabinet (1).

2. The intelligent switch cabinet with autonomous pressure relief protection according to claim 1, characterized in that: The bottom of the blocking plate (9) is connected to the inside of the cabinet (1) through an axis rotation, the driving rack (13) is arranged in an "L" shape, and one end of the driving rack (13) extends into the inside of the limit frame (11), and the side surface of one end of the driving rack (13) is bonded to the outside of the airbag (12), and the driving rack (13) and the driven gear (10) are in sliding connection.

3. The intelligent switch cabinet with autonomous pressure relief protection according to claim 1, characterized in that: The heat dissipation fan (4) is rotatably connected to the interior of the heat dissipation channel (3) via an axis, and the tail end of the heat dissipation fan (4) is fixedly connected to the output end of the motor.

4. The intelligent switch cabinet with autonomous pressure relief protection according to claim 1, characterized in that: The upper bearing of the heat dissipation channel (3) on the back of the cabinet (1) is connected to a transmission rod (17), and the bottom of the transmission rod (17) is connected to the outer side of the shaft end of the heat dissipation fan (4) through a bevel gear set. The outer side of the upper end of the transmission rod (17) is sleeved with a reciprocating screw rod (16), and a ratchet assembly (27) is installed between the reciprocating screw rod (16) and the transmission rod (17). The right side of the top of the cabinet (1) is fixedly connected to a fixed rod (18), and the outer sides of the fixed rod (18) and the reciprocating screw rod (16) are sleeved with a movable plate (15).

5. The intelligent switch cabinet with autonomous pressure relief protection according to claim 4, characterized in that: The bottom of the movable plate (15) is fixedly connected to the top of the blocking block (26), and the blocking block (26) is arranged in a shape that is narrow at the bottom and wide at the top. The movable plate (15) and the reciprocating screw rod (16) are threadedly connected, and the movable plate (15) and the fixed rod (18) are slidably connected.

6. The intelligent switch cabinet with autonomous pressure relief protection according to claim 4, characterized in that: The bottom of the transmission rod (17) extends into the interior of the heat dissipation channel (3), and the reciprocating screw rod (16) forms a one-way rotation structure through the transmission rod (17) and the ratchet assembly (27).

7. The intelligent switch cabinet with autonomous pressure relief protection according to claim 4, characterized in that: A fixed contact switch (19) is sleeved and fixed on the outer side of the upper end of the fixed rod (18), a movable contact switch (20) is installed on the right bolt on the top of the movable plate (15), and a buzzer alarm (6) is connected to the right bolt on the top of the cabinet (1), and the positions of the fixed contact switch (19) and the movable contact switch (20) correspond to each other.

8. The intelligent switch cabinet with autonomous pressure relief protection according to claim 1, characterized in that: A pipe (7) is fixed above the interior of the cabinet (1), and nozzles are installed at equal intervals at the bottom of the pipe (7). A storage box (25) is fixed on the left side of the top of the cabinet (1), and the storage box (25) and the pipe (7) are connected through a connecting pipe (22). A sealing plate (23) is provided above the interior of the connecting pipe (22), and a return spring (24) is installed between the right side of the sealing plate (23) and the inner wall of the cabinet (1), and the sealing plate (23) and the movable plate (15) are connected through a traction rope (21).

9. The intelligent switch cabinet with autonomous pressure relief protection according to claim 8, characterized in that: The storage box (25) stores HFC-227ea fire extinguishing agent inside, and the two ends of the traction rope (21) are fixedly connected between the right side of the sealing plate (23) and the left side of the bottom of the movable plate (15).

10. The intelligent switch cabinet with autonomous pressure relief protection according to claim 8, characterized in that: The right side of the sealing plate (23) extends into the interior of the cabinet (1), and the sealing plate (23), the cabinet (1) and the connecting pipe (22) are all in sliding connection.

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