Safe explosion-proof power supply cabinet

Abstract

The invention relates to the technical field of power supply cabinets, and particularly provides a safe explosion-proof power supply cabinet which comprises an installation cabinet and an explosion-proof cabinet located above the installation cabinet, an air inlet fan and an air outlet are arranged on the explosion-proof cabinet, a smoke sensor is installed on the inner wall of the explosion-proof cabinet, a flow guide pipe is fixed in the explosion-proof cabinet, and a plurality of nozzles are installed on the flow guide pipe. The flow guide pipe is communicated and connected with the dry powder tank, the dry powder tank is connected with the high-pressure tank through a valve, the dry powder tank and the high-pressure tank are fixed to the outer side wall of the explosion-proof cabinet, and the smoke sensor is in communication connection with the valve through the controller. Dry powder in the dry powder tank is pushed to the flow guide pipe through gas release in the high-pressure tank and then sprayed out from the spray head, the insulating dry powder can rapidly and efficiently extinguish flames, secondary disasters are avoided, harm to personnel and equipment is reduced, the overall safety of a mine is improved, and the life safety of the personnel is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of power cabinets, and specifically provides a safe and explosion-proof power cabinet. Background Art

[0002] In a mine environment, the requirements for power cabinets are relatively high. This is mainly because explosive gases and dust often exist in the mine environment. Once an explosion occurs in the power cabinet, it will ignite the explosive gases and dust, resulting in an explosion accident. Therefore, positive pressure explosion-proof power cabinets are used in mines. Its working principle is mainly to maintain a positive pressure state inside the cabinet, discharge the combustible gases generated inside the cabinet, avoid the accumulation of gases reaching the explosion limit, and also prevent external explosive gases, dust, etc. from entering the cabinet, thereby avoiding potential explosion risks.

[0003] However, if a fire breaks out inside the power cabinet, the power cabinets of the existing technology cannot extinguish the fire source point. Although flame retardant covers are provided at the connection points between the power cabinet and the outside world, if the fire inside the power cabinet is relatively large, the high temperature generated by the flame is also likely to ignite the surrounding explosive gases and dust, causing a larger range of explosions and endangering the safety of the mine workers. Summary of the Invention

[0004] In view of the above defects, the present invention provides a safe and explosion-proof power cabinet, and its purpose is to solve the problem that the fire source point cannot be quickly extinguished after a fire breaks out inside the power cabinet in the existing technology.

[0005] To achieve the above purpose, the present invention provides a safe and explosion-proof power cabinet, which includes an installation cabinet and an explosion-proof cabinet located above the installation cabinet. The explosion-proof cabinet is configured with an air inlet fan and an air outlet. A flame retardant cover is provided at the outlet position of the air outlet, and the flame retardant cover is fixed on the side of the explosion-proof cabinet. A smoke sensor is installed on the inner wall of the explosion-proof cabinet. A diversion pipe is fixed inside the explosion-proof cabinet, and a plurality of nozzles are installed on the diversion pipe. The diversion pipe is connected and communicated with a dry powder tank, and the dry powder tank is connected to a high-pressure tank through a valve. The dry powder tank and the high-pressure tank are fixed on the outer side wall of the explosion-proof cabinet. The smoke sensor is communicatively connected to the valve through a controller; A partition is configured inside the explosion-proof cabinet. The partition is elastically connected to the top of the explosion-proof cabinet. A first through hole is opened on the partition, and a flame retardant net is fixed in the first through hole. One end of an air outlet cylinder is fixed on the partition, and the air outlet cylinder is coaxially arranged with the first through hole. The other end of the air outlet cylinder can be movably configured inside a diversion cylinder, and the diversion cylinder is fixed on the top of the explosion-proof cabinet. A first rotating shaft is rotatably installed inside the air outlet cylinder, and the first rotating shaft is fixed to a baffle. One end of a first connecting rod is fixed to the end of the first rotating shaft, and the other end of the first connecting rod is hinged to a second connecting rod. The second connecting rod is hinged to the top of the explosion-proof cabinet.

[0006] Preferably, a hook is fixed to the bottom of the partition board. The hook can be lapped with a pin shaft. The pin shaft is fixed on a slide bar. A first lever is fixed to the bottom of the slide bar. The first lever can be lapped with a knife arm. One end of the knife arm is hinged to a first contact piece. The other end of the knife arm can be lapped with a second contact piece. Both the first contact piece and the second contact piece are fixed to the inner wall of the explosion-proof cabinet through an insulating cross arm.

[0007] Preferably, the slide bar is slidably arranged in a guide rail. The guide rail is fixed to the inner wall of the explosion-proof cabinet. A plurality of locking teeth are fixed on the slide bar. A first groove is formed in the side wall of the guide rail. A first spring is arranged in the first groove. One end of the first spring is fixed to the inner wall of the first groove. The other end of the first spring is fixed to a stop block. The stop block is slidably arranged in the first groove. The locking teeth can abut against the stop block.

[0008] Preferably, one end of a guide rod is fixed to the partition board. The guide rod is movably arranged in a guide cylinder. The guide cylinder is fixedly connected to the explosion-proof cabinet. A second spring is arranged in the guide rod and the guide cylinder. One end of the second spring is fixedly connected to the explosion-proof cabinet. The other end of the second spring is fixed to the partition board. A convex ring is fixed to the outer wall of the guide rod. The convex ring can abut against a limit ring. The limit ring is fixed to the inner wall of the guide cylinder.

[0009] Preferably, a second rotating shaft is rotatably installed in the explosion-proof cabinet. The second rotating shaft is fixedly connected to an equipment board. Electrical components are installed on the equipment board. A handle is fixed to the equipment board. A second lever is fixed to the equipment board. The second lever can be lapped with the knife arm.

[0010] Preferably, a first support block is fixed to the inner wall of the explosion-proof cabinet. A limit groove is formed in the side wall of the explosion-proof cabinet. A limit bolt is slidably installed on the equipment board. The limit bolt can be slidably matched with the limit groove. A second support block is fixed to the bottom wall of the explosion-proof cabinet.

[0011] Preferably, two mounting pieces are fixed to the first contact piece. A third rotating shaft is rotatably installed on the mounting pieces. The third rotating shaft is fixedly connected to the knife arm. One end of a damping spring is fixed to the mounting pieces. The other end of the damping spring is fixed to the knife arm.

[0012] Preferably, a first dust-proof cover is arranged at the outlet position of the flow guide cylinder. The first dust-proof cover is fixed to the top surface of the explosion-proof cabinet.

[0013] The purpose of the present invention is to provide a safe explosion-proof power cabinet, which has the following beneficial effects: ① In the present invention, by setting the gas release in the high-pressure tank, the dry powder in the dry powder tank is pushed towards the diversion pipe and then ejected from the nozzle. The insulating dry powder can quickly and efficiently extinguish the flame, avoid secondary disasters such as gas and coal dust explosions caused by the spread of the fire, reduce the harm to personnel and equipment, improve the overall safety of the mine, and ensure the safety of personnel's lives.

[0014] ② In the present invention, by setting the partition to move upward to drive the baffle to rotate, the first through hole, the air outlet cylinder and the diversion cylinder can form a gas flow channel, preventing the excessive air pressure in the explosion-proof cabinet body from causing damage such as deformation and rupture to the cabinet body after the dry powder is introduced, and ensuring the structural integrity of the explosion-proof cabinet. Description of the Drawings

[0015] Figure 1 is the front view of a safety explosion-proof power cabinet; Figure 2 is the structural schematic diagram of the explosion-proof cabinet of the present invention; Figure 3 is the position schematic diagram of the partition of the present invention; Figure 4 is the cooperation schematic diagram of the diversion cylinder and the air outlet cylinder of the present invention; Figure 5 is the cooperation schematic diagram of the slide bar and the guide rail of the present invention; Figure 6 is Figure 5 the partial enlarged view of A of Figure 7 is the cooperation schematic diagram of the locking tooth and the stop block of the present invention; Figure 8 is the cooperation schematic diagram of the guide rod and the guide cylinder of the present invention; Figure 9 is the dynamic change diagram of the explosion-proof cabinet of the present invention; Figure 10 is Figure 9 the partial enlarged view of B of

[0016] In the figure: 1 - installation cabinet; 2 - explosion-proof cabinet; 3 - inlet fan; 4 - air outlet; 5 - flame-retardant cover; 10 - diversion pipe; 11 - nozzle; 12 - dry powder tank; 13 - high-pressure tank; 21 - partition; 22 - first through hole; 23 - flame-retardant net; 24 - air outlet cylinder; 25 - diversion cylinder; 26 - first rotating shaft; 27 - baffle; 28 - first connecting rod; 29 - second connecting rod; 30 - hook; 31 - pin shaft; 32 - slide bar; 33 - first shift lever; 34 - cutter arm; 35 - first contact piece; 36 - second contact piece; 37 - insulating cross arm; 40 - guide rail; 41 - locking tooth; 42 - first groove; 43 - first spring; 44 - stop block; 50 - guide rod; 51 - guide cylinder; 52 - second spring; 53 - convex ring; 54 - limit ring; 60 - second rotating shaft; 61 - equipment board; 62 - handle; 63 - second shift lever; 70 - first support block; 71 - limit groove; 72 - limit bolt; 73 - second support block; 81 - mounting plate; 82 - third rotating shaft; 83 - damping spring; 84 - first dust-proof cover. Detailed implementation manner

[0017] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0018] As Figures 1 - 10 shown, the present invention provides a safe explosion-proof power cabinet, including an installation cabinet 1, in which electrical components without explosion risk are mainly installed. An explosion-proof cabinet 2 is arranged above the installation cabinet 1, and electrical components with higher explosion risk are installed in the explosion-proof cabinet 2. An inlet fan 3 and an air outlet 4 are arranged on the explosion-proof cabinet 2. The inlet fan 3 continuously introduces protective gas into the explosion-proof cabinet 2. The inlet fan 3 and the air outlet 4 are symmetrically arranged left and right. If the density of the protective gas is greater than the density of air, the horizontal height of the inlet fan 3 is higher than that of the air outlet 4. If the density of the protective gas is less than the density of air, the horizontal height of the inlet fan 3 is lower than that of the air outlet 4. At the same time, the airtightness of the explosion-proof cabinet 2 itself should be ensured when the cabinet door is closed to form an effective air flow cycle. A flame-retardant cover 5 is arranged at the outlet position of the air outlet 4. The flame-retardant cover 5 is fixed on the side of the explosion-proof cabinet 2. The flame-retardant cover 5 is preferably made of ceramic fiber material, which can not only ensure the passage of air flow but also block flames and particulate matter.

[0019] A smoke sensor is installed on the inner wall of the explosion-proof cabinet 2 to monitor the smoke concentration inside the cabinet in real time. An explosion-proof smoke sensor is preferably used, and the signal is transmitted to the controller through an explosion-proof junction box to ensure the stable operation of the sensor. A diversion pipe 10 is fixed inside the explosion-proof cabinet 2. Specifically, the diversion pipe 10 is fixed to the inner wall of the explosion-proof cabinet 2 using an insulating bracket. A plurality of nozzles 11 are installed on the diversion pipe 10, and a check valve is provided inside the nozzles 11 to prevent the gas inside the explosion-proof cabinet 2 from entering the diversion pipe through the nozzles 11 due to high pressure. The diversion pipe 10 is connected and communicated with a dry powder tank 12, and the dry powder tank 12 is filled with ultra-fine insulating dry powder. The dry powder tank 12 is connected to a high-pressure tank 13 through a valve, and the valve is an explosion-proof solenoid valve. The dry powder tank 12 and the high-pressure tank 13 are fixed to the outer side wall of the explosion-proof cabinet 2. The smoke sensor is communicatively connected to the valve through the controller, and the response time is less than 50 milliseconds.

[0020] The insulating dry powder mainly extinguishes fires through a chemical inhibition effect. After the insulating dry powder is released, the chemical components therein can quickly react with the free radicals in the combustion reaction, interrupt the chain reaction of combustion, and thus achieve the purpose of extinguishing the fire.

[0021] After the smoke sensor detects that the smoke concentration in the explosion-proof cabinet 2 exceeds the standard, the valve is opened, and the gas in the high-pressure tank 13 pushes the dry powder in the dry powder tank 12 into the diversion pipe 10, and then sprays out from the nozzles 11. After spraying, the pressure inside the explosion-proof cabinet 2 will rise suddenly, and it is impossible to balance the air pressure in a short time only by exhausting through the air outlet 4. Therefore, a partition 21 is arranged inside the explosion-proof cabinet 2. The partition 21 divides the internal space of the explosion-proof cabinet 2 into two parts. The partition 21 is elastically connected to the top of the explosion-proof cabinet 2. A first through hole 22 is opened on the partition 21, and a flame-retardant net 23 is fixed in the first through hole 22. One end of an air outlet cylinder 24 is fixed to the partition 21, and the air outlet cylinder 24 is coaxially arranged with the first through hole 22. The other end of the air outlet cylinder 24 can be movably arranged inside a diversion cylinder 25, and the diversion cylinder 25 is communicated with the outside of the explosion-proof cabinet 2. That is to say, the first through hole 22, the air outlet cylinder 24 and the diversion cylinder 25 can form a gas flow channel. The diversion cylinder 25 is fixed to the top of the explosion-proof cabinet 2. A first rotating shaft 26 is rotatably installed inside the air outlet cylinder 24, and the first rotating shaft 26 is fixed to a baffle 27. One end of a first connecting rod 28 is fixed to the end of the first rotating shaft 26, and the other end of the first connecting rod 28 is hinged to one end of a second connecting rod 29. The other end of the second connecting rod 29 is hinged to the top of the explosion-proof cabinet 2.

[0022] Through the release of the gas in the high-pressure tank 13, the dry powder in the dry powder tank 12 is pushed into the diversion pipe 10 and then sprayed out from the nozzles 11. The insulating dry powder can quickly and efficiently extinguish the fire, prevent the spread of the fire from causing secondary disasters such as gas and coal dust explosions, reduce the harm to personnel and equipment, improve the overall safety of the mine, and ensure the life safety of personnel.

[0023] Normally, the baffle 27 closes the inner channel of the air outlet cylinder 24. When the pressure in the high-pressure tank 13 suddenly rises, the air pressure pushes the partition plate 21 upward, thereby driving the air outlet cylinder 24 upward. The air outlet cylinder 24 is inserted into the flow guide cylinder 25 to form a gas flow channel. Under the transmission of the first connecting rod 28 and the second connecting rod 29, the first rotating shaft 26 rotates, thereby driving the baffle 27 to rotate. The blockage of the inner channel of the air outlet cylinder 24 by the baffle 27 becomes smaller, the fluid channel expands, and the gas can be discharged along the air outlet cylinder 24 and the flow guide cylinder 25. The flame retardant net 23 is preferably a ceramic fiber flame retardant net, which can not only ensure the passage of air flow but also block flames and particulate matter.

[0024] If the gas release rate of the high-pressure tank 13 is too low, the dry powder ejected cannot act on the fire source point in time. If the gas release rate of the high-pressure tank 13 is too high, it is easy to exceed the pressure-bearing limit of the explosion-proof cabinet 2. Therefore, the partition plate 21 is set to move upward to drive the baffle 27 to rotate, forming a new air flow channel, preventing the excessive air pressure in the explosion-proof cabinet 2 from deforming or cracking the cabinet body after the dry powder is introduced, and ensuring the structural integrity of the explosion-proof cabinet 2. At the same time, the pressure in the high-pressure tank 13 and the opening of the valve need to be preset in advance to balance the gas release rate and the pressure growth rate in the explosion-proof cabinet 2. The relationship between the opening and the pressure can be determined through experiments or simulations, so that the gas release amount during the powder spraying stage can ensure the dry powder spraying efficiency and lift the partition plate 21 without exceeding the pressure-bearing limit of the explosion-proof cabinet 2.

[0025] As a further explanation of this embodiment, a hook 30 is fixed to the bottom of the partition plate 21. The hook 30 can be lapped with a pin shaft 31. The pin shaft 31 is fixed on a slide bar 32. The bottom of the slide bar 32 is fixed with a first lever 33. The first lever 33 is made of insulating material. The first lever 33 can be lapped with a knife arm 34. Specifically, an extension rod is fixed at a position near the rotating end of the upper part of the knife arm 34. The first lever 33 can be lapped with the extension rod. One end of the knife arm 34 is hinged to a first contact piece 35. The first contact piece 35 is connected to the wire leading into the cabinet body. The other end of the knife arm 34 can be lapped with a second contact piece 36. The second contact piece 36 is connected to the electrical components in the cabinet body through a wire. Both the first contact piece 35 and the second contact piece 36 are fixed to the inner wall of the explosion-proof cabinet 2 through an insulating cross arm 37. After such a setting, the rotation of the knife arm 34 can control the opening and closing of the circuit. When the partition plate 21 moves upward, the slide bar 32 is driven to move upward through the hook 30, thereby driving the first lever 33 to move upward. When the first lever 33 moves upward, it is lapped with the extension rod of the knife arm 34, thereby driving the knife arm 34 to rotate around its hinge point with the first contact piece 35. The knife arm 34 rotates until it is no longer lapped with the second contact piece 36, and the circuit is disconnected.

[0026] As a further explanation of this embodiment, in order to ensure the stability of the upward movement of the partition plate 21 under pressure, a guiding mechanism is added in this solution. Specifically, one end of a guiding rod 50 is fixed to the partition plate 21, and the guiding rod 50 is movably arranged in a guiding cylinder 51. The guiding cylinder 51 is fixed to the bottom surface of the top of the explosion-proof cabinet 2. A second spring 52 is arranged in the guiding rod 50 and the guiding cylinder 51. One end of the second spring 52 is fixedly connected to the explosion-proof cabinet 2, and the other end of the second spring 52 is fixed to the partition plate 21. A convex ring 53 is fixed to the outer wall of the guiding rod 50, and the convex ring 53 can abut against a limiting ring 54. The limiting ring 54 is fixed to the inner wall of the guiding cylinder 51.

[0027] When the explosion-proof cabinet 2 is working normally, the convex ring 53 can abut against the limiting ring 54 to prevent the partition plate 21 from falling downward due to gravity. When the nozzle 11 sprays out dry powder, the pressure in the high-pressure tank 13 suddenly rises, pushing the partition plate 21 upward and compressing the second spring 52. The second spring 52 can produce a certain buffer for this pressure, and the guiding rod 50 moves upward in the guiding cylinder 51 to ensure the stability of the movement of the partition plate 21.

[0028] As a further explanation of this embodiment, the slide bar 32 is slidably arranged in the guide rail 40. The guide rail 40 is fixed to the inner wall of the explosion-proof cabinet 2. A plurality of locking teeth 41 are fixed to the slide bar 32. A first groove 42 is formed in the side wall of the guide rail 40. A first spring 43 is arranged in the first groove 42. One end of the first spring 43 is fixed to the inner wall of the first groove 42, and the other end of the first spring 43 is fixed to a stop block 44. The stop block 44 is slidably arranged in the first groove 42, and the locking teeth 41 can abut against the stop block 44. Specifically, the top surface of the locking teeth 41 is an arc surface, and the bottom surface of the stop block 44 is an inclined surface. When the slide bar 32 moves upward, the arc surface of the locking teeth 41 abuts against the inclined surface of the stop block 44, causing the stop block 44 to move into the first groove 42 and compress the first spring 43. When the slide bar 32 stops moving upward, the horizontal bottom surface of the locking teeth 41 abuts against the horizontal top surface of the stop block 44 to prevent the slide bar 32 from sliding down due to gravity.

[0029] Preferably, in order to prevent dry powder from entering the air inlet fan 3 due to the sudden rise in pressure in the explosion-proof cabinet 2, a one-way valve is installed at the connection position between the air inlet fan 3 and the explosion-proof cabinet 2, allowing only the air inlet fan 3 to introduce gas into the explosion-proof cabinet 2.

[0030] The reason for limiting the slider 32 is that after the first lever 33 drives the knife arm 34 to disengage from the second contact piece 36, the circuit is disconnected. Subsequently, the ultra-fine dry powder ejected by the nozzle 11 extinguishes the flame in the explosion-proof cabinet 2. After the extinguishment, no more dry powder is introduced, and the partition 21 descends. However, it is still necessary to ensure that the circuit remains disconnected. Therefore, a stop block 44 is provided to cooperate with the locking tooth 41 to prevent the slider 32 from descending. The first lever 33 can still support the knife arm 34 to ensure the disconnected state of the circuit.

[0031] Since the installation of the slider 32 on the inner wall of the explosion-proof cabinet 2 occupies some space, and to prevent the staff from damaging the nozzle 11 or being bumped by the nozzle 11 when overhauling the electrical components inside the explosion-proof cabinet 2, this solution chooses to install the electrical components on a separate equipment board 61. When maintenance is required, the equipment board 61 can be rotated to the horizontal position. Specifically, a second rotating shaft 60 is rotatably installed in the explosion-proof cabinet 2, and the second rotating shaft 60 is fixedly connected to the equipment board 61. Electrical components are installed on the equipment board 61, and a handle 62 is fixed on the equipment board 61. When maintenance is required, the staff pulls the handle to rotate the equipment board 61 to the horizontal state for maintenance.

[0032] Since the circuit also needs to be disconnected during maintenance, a second lever 63 can be fixed on the equipment board 61, and the second lever 63 can also be lapped with the knife arm 34. Specifically, the second lever 63 is installed at a position near the bottom of the equipment board 61. As the equipment board 61 rotates, the second lever 63 gradually laps with the extension rod of the knife arm 34, thereby driving the knife arm 34 to rotate around its hinge point with the first contact piece 35. The knife arm 34 rotates until it no longer laps with the second contact piece 36, and the circuit is disconnected. Maintenance is carried out in a power-off environment to ensure the safety of maintenance.

[0033] When the equipment board 61 rotates to the horizontal state, in order to support the equipment board 61, two first support blocks 70 are fixed on the inner wall of the explosion-proof cabinet 2, and the two first support blocks 70 are arranged oppositely; when the equipment board 61 is in the vertical state, it is also necessary to support the equipment board 61. Therefore, a second support block 73 is fixed on the bottom wall of the explosion-proof cabinet 2. A limiting groove 71 is opened on the side wall of the explosion-proof cabinet 2, and a limiting bolt 72 is slidably installed on the equipment board 61. The limiting bolt 72 can be inserted into the limiting groove 71 and slidably cooperate with the limiting groove 71.

[0034] As a further explanation of this embodiment, two mounting pieces 81 are fixed on the first contact piece 35, and a third rotating shaft 82 is rotatably mounted on the mounting piece 81, and the third rotating shaft 82 is fixedly connected to the knife arm 34. One end of a damping spring 83 is fixed on the mounting piece 81, and the other end of the damping spring 83 is fixedly connected to the knife arm 34. When the knife arm 34 rises under the toggle of the first lever 33 or the second lever 63, the damping spring 83 is compressed to store elastic potential energy, and when the first lever 33 or the second lever 63 no longer contacts the knife arm 34, the damping spring 83 is reset to drive the knife arm 34 to overlap with the second contact piece 36 again.

[0035] In order to prevent dust from falling into the explosion-proof cabinet 2 , a first dust cover 84 is provided at the outlet of the guide tube 25 , and the first dust cover 84 is fixed on the top surface of the explosion-proof cabinet 2 .

[0036] The present invention is not limited to the above-mentioned specific implementation modes. Various changes made by ordinary technicians in this field based on the above-mentioned concepts without creative work are all within the protection scope of the present invention.

Claims

1. A safety explosion-proof power cabinet, comprising an installation cabinet and an explosion-proof cabinet located above the installation cabinet. An air inlet fan and an air outlet are configured on the explosion-proof cabinet. A flame retardant cover is arranged at the outlet position of the air outlet, and the flame retardant cover is fixed on the side surface of the explosion-proof cabinet. It is characterized in that, A smoke sensor is installed on the inner wall of the explosion-proof cabinet. A diversion pipe is fixed inside the explosion-proof cabinet, and a plurality of nozzles are installed on the diversion pipe. The diversion pipe is communicated with and connected to a dry powder tank. The dry powder tank is connected to a high-pressure tank through a valve. The dry powder tank and the high-pressure tank are fixed on the outer side wall of the explosion-proof cabinet. The smoke sensor is communicatively connected to the valve through a controller; A partition is arranged inside the explosion-proof cabinet. The partition is elastically connected to the top of the explosion-proof cabinet. A first through hole is opened on the partition, and a flame-retardant net is fixed in the first through hole. One end of an air outlet cylinder is fixed on the partition. The air outlet cylinder is coaxially arranged with the first through hole. The other end of the air outlet cylinder can be movably arranged in a diversion cylinder. The diversion cylinder is fixed on the top of the explosion-proof cabinet. A first rotating shaft is rotatably installed in the air outlet cylinder. The first rotating shaft is fixed to a baffle. One end of a first connecting rod is fixed to the end of the first rotating shaft. The other end of the first connecting rod is hinged to a second connecting rod. The second connecting rod is hinged to the top of the explosion-proof cabinet.

2. The safety explosion-proof power cabinet according to claim 1, characterized in that, A hook is fixed to the bottom of the partition. The hook can be lapped with a pin shaft. The pin shaft is fixed on a sliding strip. A first shifting rod is fixed to the bottom of the sliding strip. The first shifting rod can be lapped with a knife arm. One end of the knife arm is hinged to a first contact piece. The other end of the knife arm can be lapped with a second contact piece. The first contact piece and the second contact piece are both fixed to the inner wall of the explosion-proof cabinet through an insulating cross arm.

3. The safety explosion-proof power cabinet according to claim 2, characterized in that, The sliding strip is slidably arranged in a guide rail. The guide rail is fixed to the inner wall of the explosion-proof cabinet. A plurality of locking teeth are fixed on the sliding strip. A first groove is opened on the side wall of the guide rail. A first spring is arranged in the first groove. One end of the first spring is fixed to the inner wall of the first groove. The other end of the first spring is fixed to a stopper. The stopper is slidably arranged in the first groove. The locking teeth can abut against the stopper.

4. The safety explosion-proof power cabinet according to claim 3, wherein, One end of a guide rod is fixed to the partition. The guide rod is movably arranged in a guide cylinder. The guide cylinder is fixedly connected to the explosion-proof cabinet. A second spring is arranged in the guide rod and the guide cylinder. One end of the second spring is fixedly connected to the explosion-proof cabinet. The other end of the second spring is fixed to the partition. A convex ring is fixed to the outer wall of the guide rod. The convex ring can abut against a limit ring. The limit ring is fixed to the inner wall of the guide cylinder.

5. The safety explosion-proof power cabinet according to claim 4, characterized in that, A second rotating shaft is rotatably installed inside the explosion-proof cabinet. The second rotating shaft is fixedly connected to an equipment board. Electrical components are installed on the equipment board. A handle is fixed to the equipment board. A second shifting rod is fixed to the equipment board. The second shifting rod can be lapped with the knife arm.

6. The safety explosion-proof power cabinet according to claim 5, wherein A first support block is fixed to the inner wall of the explosion-proof cabinet. A limit groove is opened on the side wall of the explosion-proof cabinet. A limit bolt is slidably installed on the equipment board. The limit bolt can be slidably matched with the limit groove. A second support block is fixed to the bottom wall of the explosion-proof cabinet.

7. The safety explosion-proof power cabinet according to claim 5, characterized in that, Two mounting pieces are fixed to the first contact piece. A third rotating shaft is rotatably installed on the mounting pieces. The third rotating shaft is fixedly connected to the knife arm. One end of a damping spring is fixed to the mounting pieces. The other end of the damping spring is fixed to the knife arm.

8. The safety explosion-proof power cabinet according to claim 1, characterized in that, A first dust-proof cover is arranged at the outlet position of the draft tube, and the first dust-proof cover is fixed on the top surface of the explosion-proof cabinet.

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