PLC (programmable logic controller) control cabinet with dustproof structure for tunnel

Abstract

The invention relates to the technical field of control cabinets, in particular to a plc control cabinet with a dustproof structure for a tunnel. Comprising a cabinet body; the opening and closing door is rotationally connected to the cabinet body, the opening and closing door is fixedly connected with a sealing strip used for keeping the cabinet body sealed, and electronic components are placed in the cabinet body; the first ventilation shell is fixedly connected in the cabinet body, and the first ventilation shell is fixedly connected and communicated with a corrugated pipe; the second ventilation shell is fixedly connected in the cabinet body and is communicated with the first ventilation shell; and the symmetrical ventilation shells are fixedly connected and communicated with the cabinet body, and the symmetrical ventilation shells are slidably connected with sliding shells. The states of the exhaust fans are monitored in real time, when it is detected that a certain exhaust fan stops rotating, the standby cooling channel is automatically switched, it is ensured that the standby cooling channel can carry out key cooling on electronic components in the plc control cabinet, and meanwhile the remaining exhaust fans continue to complete the cooling task on the electronic components.

Description

Technical Field

[0001] The invention relates to the technical field of control cabinets, and in particular to a PLC control cabinet with a dustproof structure for tunnels. Background Art

[0002] The plc control cabinet is an advanced programmable control cabinet specially used to accurately control the opening and closing of electrical equipment. In the tunnel environment, the plc control cabinet plays a vital role. It can not only intelligently adjust the lighting system to ensure the appropriate light in the tunnel, but also effectively control the ventilation system to maintain the air quality and temperature in the tunnel. In addition, the plc control cabinet can also monitor traffic flow in real time through vehicle detection devices to ensure smooth and safe traffic in the tunnel. These functions together improve the safety of the tunnel and provide drivers and passengers with a more comfortable and reliable travel experience.

[0003] During the use of the existing PLC control cabinet, the electronic components inside it will generate heat when working. If the heat is not dissipated in time, the temperature inside the cabinet will increase, which will affect the performance and life of the equipment. Therefore, the existing PLC control cabinet usually has exhaust fans installed on the upper and lower sides to maintain air circulation inside. Through the operation of the exhaust fan, cold air from the outside can be drawn into the cabinet and the heat can be discharged, thereby achieving effective cooling and heat dissipation of air circulation in the cabinet and electronic components.

[0004] However, if one of the exhaust fans stops rotating due to equipment abnormality, it will not be able to provide effective air extraction or exhaust, and the cooling efficiency of electronic components will be greatly reduced. If electronic components are in a high temperature environment for a long time, their service life will be affected. Summary of the invention

[0005] In order to solve the problems mentioned in the above background technology, the present invention provides a PLC control cabinet with a dustproof structure for tunnels.

[0006] The technical solution of the present invention is: a PLC control cabinet with a dustproof structure for a tunnel, comprising: Cabinet; A switch door is rotatably connected to the cabinet body, the switch door is fixed with a sealing strip for keeping the cabinet body sealed, and electronic components are placed in the cabinet body; A first ventilation shell is fixedly connected to the cabinet, and the first ventilation shell is fixedly connected to and communicated with a bellows passing through the switch door and fixedly connected thereto; A second ventilation shell, fixedly connected to the cabinet and communicated with the first ventilation shell; Symmetrical ventilation shells are all fixedly connected to and communicated with the cabinet body, and the symmetrical ventilation shells are all slidably connected to sliding shells, one of the sliding shells is slidably connected to the second ventilation shell, and the other sliding shell is slidably connected to the first ventilation shell, and the second ventilation shell, the first ventilation shell and the symmetrical ventilation shells are all fixedly connected to filter elements, and a driving element is arranged in the sliding shell; An air induction component is arranged in the sliding shell and is used to guide the wind; A control component is arranged in the cabinet and is used for controlling the movement of all the sliding shells.

[0007] Further description, the air induction component includes: The rotating shell is fixedly connected to the driving shaft of the driving member. The rotating shell is rotatably connected to the swing blades distributed in a ring array. The wind force is controlled by changing the swing angle of the swing blades.

[0008] Further description, the air induction component also includes: The L-shaped frames distributed in a ring array are all slidably connected in the rotating shell, the swing blades are provided with spaced oblique grooves, the L-shaped frames are fixed with spaced fixed pins, and the fixed pins on the L-shaped frames slide in adjacent oblique grooves in adjacent swing blades; The number of counterweight blocks is consistent with the number of the L-shaped frames on the rotating shell, and they are respectively fixed to the L-shaped frames distributed in a ring array, and the counterweight blocks are slidingly connected to the rotating shell. A spring rod is fixed in the swing blade, and the telescopic end of the spring rod is limitedly rotatably connected to the adjacent L-shaped frame.

[0009] It is further explained that the rotating shell is slidably connected to a sliding frame, the sliding frame is hinged with hinged rods with the same number as the counterweight blocks on adjacent rotating shells, and the hinged rods are hinged to adjacent counterweight blocks.

[0010] Further description, the control component includes: An electric push rod, fixedly connected to the first ventilation shell; A U-shaped frame is slidably connected to the cabinet, the telescopic end of the electric push rod is fixedly connected to the U-shaped frame, the symmetrical sliding shells are fixedly connected to the U-shaped frame, and the rotating shell and the sliding shell are jointly provided with a speed sensor; The flow guide component is arranged on the first ventilation shell and is used for guiding the gas in the first ventilation shell.

[0011] Further description, the diversion component includes: A first air guide shell, fixedly connected to and connected to the first ventilation shell; The air guide block is fixedly connected to the inner side of the first ventilation shell. The air guide block is fixedly connected to the first air guide shell. The air guide block is provided with a communication hole.

[0012] Further explanation: the first air guide shell is composed of a parallelogram cavity, a rectangular cavity and an arc cavity which are interconnected. The arc cavity in the first air guide shell is connected to the first ventilation shell. The rectangular cavity of the first air guide shell is located between the parallelogram cavity and the arc cavity above it. The first air guide shell is fixedly connected and connected to an air outlet pipe. The air outlet pipe on the first air guide shell is connected to the parallelogram cavity inside it. The arc cavity in the first air guide shell is located on one side inside the first ventilation shell facing downward, and the air guide block is located at the arc cavity in the first air guide shell.

[0013] Further description, the diversion component also includes: An exhaust shell is fixedly connected to and communicated with the first ventilation shell, the exhaust shell is located above the first air guide shell, the exhaust shell is provided with a through hole, the side of the exhaust shell located in the first ventilation shell faces upward, two trapezoidal blocks are fixedly connected in the first ventilation shell, the side of the exhaust shell located in the first ventilation shell is located between the two trapezoidal blocks in the first ventilation shell, and the exhaust shell passes through the adjacent trapezoidal blocks in the first ventilation shell and is fixedly connected thereto.

[0014] Further explanation includes: The second air guide shell is fixedly connected to the switch door, one side of the second air guide shell is an air inlet, the other side of the second air guide shell is an air outlet, and the corrugated pipe is fixedly connected to and communicated with the second air guide shell.

[0015] Further description, the bellows is fixedly connected to and communicated with a bend pipe located in the second air guide shell, and the bend pipe of the bellows is located on one side in the second air guide shell facing the air outlet of the second air guide shell, a fixing ring is fixedly connected to the middle part of the second air guide shell, the cross-section of the fixing ring of the second air guide shell is trapezoidal, and the bend pipe of the bellows is located in the fixing ring in the middle part of the second air guide shell.

[0016] Compared with the prior art, the present invention has the following beneficial effects: the present invention aims to solve the problem that the exhaust fan used for air circulation in the existing PLC control cabinet stops rotating due to equipment abnormality, resulting in the inability to effectively cool down the electronic components. Specifically, the present invention monitors the status of the exhaust fan in real time, and when it is detected that a certain exhaust fan stops rotating, it automatically switches to the spare cooling channel to ensure that the spare cooling channel can focus on cooling down the electronic components in the PLC control cabinet, while allowing the remaining exhaust fans to continue to complete the cooling task of the electronic components, and in the process of cooling down the PLC control cabinet, the dust prevention in the PLC control cabinet is achieved through the cooperation of the sealing strip and the filter element; The present invention adopts a method of changing the exhaust fan structure when focusing on cooling down electronic components, so that the blades of the exhaust fan can remain in a vertical state when they stop rotating, reducing the obstruction of the air inlet or outlet of the PLC control cabinet, thereby improving the air circulation efficiency; When emergency cooling of electronic components is performed, a direct blowing method is used to allow the cooling gas to blow directly onto the electronic components. While lowering the temperature of the electronic components, the hot air around the electronic components is blown upwards to reduce the retention time of the hot air around the electronic components, thereby enhancing the cooling efficiency of the electronic components. In addition, a negative pressure extraction method is used to actively extract the hot air on the upper side of the electronic components, further shortening the retention time of the hot air around the electronic components. When the gas is discharged from the bellows, the second air guide shell comes into contact with the external natural wind, thereby achieving the effect of actively extracting the gas in the bellows, so that the gas in the bellows can be discharged faster. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the opening and closing door of the present invention; Figure 3 It is a three-dimensional structural sectional view of the cabinet of the present invention; Figure 4 It is a three-dimensional structural cross-sectional view of the first ventilation shell of the present invention; Figure 5 is a three-dimensional structural cross-sectional view of the second ventilation shell of the present invention; Figure 6 It is a three-dimensional structural cross-sectional view of the sliding shell of the present invention; Figure 7 It is a three-dimensional structural cross-sectional view of the rotating shell of the present invention; Figure 8 It is a three-dimensional structural cross-sectional view of the swing blade of the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure of the first ventilation shell and the second ventilation shell of the present invention; Fig.10 It is a three-dimensional structural cross-sectional view of the first ventilation shell of the present invention; Fig.11 is a three-dimensional structural cross-sectional view of the first air guide shell of the present invention; Fig.12 It is a cross-sectional view of the three-dimensional structure of the second air guide shell of the present invention.

[0018] In the above drawings: 10-cabinet, 11-switch door, 12-electronic components, 13-first ventilation shell, 131-bellows, 14-second ventilation shell, 15-ventilation shell, 16-sliding shell, 17-filter, 18-drive member, 20-rotating shell, 21-swinging blade, 30-L-shaped frame, 31-counterweight, 32-spring rod, 40-sliding frame, 41-hinged rod, 50-speed sensor, 60-electric push rod, 61-U-shaped frame, 70-first air guide shell, 71-air guide block, 72-exhaust shell, 80-second air guide shell. DETAILED DESCRIPTION

[0019] The preferred technical solutions of the present invention are described in detail below with reference to the accompanying drawings.

[0020] The present invention aims to solve the problem that the exhaust fan used for air circulation in the existing PLC control cabinet stops rotating due to equipment abnormality, thereby failing to effectively cool down the electronic components. Specifically, the present invention monitors the status of the exhaust fans in real time, and when it detects that a certain exhaust fan stops rotating, it automatically switches to the spare cooling channel, so that the spare cooling channel can focus on cooling the electronic components in the PLC control cabinet, while ensuring that the remaining exhaust fans continue to complete the cooling task of the electronic components.

[0021] Embodiment 1: A PLC control cabinet with dustproof structure for tunnel, such as Figure 1-Figure 5 and Fig. 9 As shown, it includes: a cabinet 10; a switch door 11, which is rotatably connected to the cabinet 10, and the switch door 11 is fixedly connected to a sealing strip for keeping the cabinet 10 sealed, and electronic components 12 are placed in the cabinet 10; a first ventilation shell 13, which is fixedly connected to the cabinet 10, and the first ventilation shell 13 is fixedly connected and communicated with a bellows 131 that passes through the switch door 11 and is fixed thereto; a second ventilation shell 14, which is fixedly connected to the cabinet 10 and communicated with the first ventilation shell 13; symmetrical ventilation shells 15, both of which are fixedly connected and communicated with the cabinet 10 The symmetrical ventilation shells 15 are all slidably connected to the sliding shells 16, one of the sliding shells 16 is slidably connected to the second ventilation shell 14, and the other sliding shell 16 is slidably connected to the first ventilation shell 13. The second ventilation shell 14, the first ventilation shell 13 and the symmetrical ventilation shells 15 are all fixedly connected with the filter element 17, and a driving element 18 is arranged in the sliding shell 16; an air induced draft component is arranged in the sliding shell 16 for guiding the wind; a control component is arranged in the cabinet 10 for controlling the movement of all the sliding shells 16.

[0022] In the above scheme, the sealing strip between the switch door 11 and the cabinet 10 is used to prevent insects from entering the two. The dustproof inside the cabinet 10 is achieved by the cooperation of the sealing strip and the filter element 17. The electronic components 12 are used to control the opening and closing of the power equipment in the tunnel. The first ventilation shell 13 is fixed to the lower side of the cabinet 10 through two bolt seats, and the second ventilation shell 14 is fixed to the upper side of the cabinet 10. The lower side of the second ventilation shell 14 is provided with an inclined surface for guiding the gas flowing through the first ventilation shell 13. The two symmetrical ventilation shells 15 are used to provide daily ventilation in the cabinet 10. The filter element 17 is a filter screen, and the drive element 18 is a single-axis drive motor.

[0023] like Figure 5-Figure 8 As shown, the wind induced assembly includes: a rotating shell 20 fixed to the driving shaft of the driving member 18, the rotating shell 20 is rotatably connected to the swing blades 21 distributed in a ring array, and the wind force is controlled by changing the swing angle of the swing blades 21.

[0024] In the above scheme, when the swing blade 21 is in a vertical state, the shielding area of ​​the ventilation shell 15 is reduced. When the swing blade 21 is in an inclined state, the swing blade 21 and the rotating shell 20 rotate to realize the extraction of gas.

[0025] like Figure 7 and Figure 8 As shown, the air induction assembly also includes: L-shaped frames 30 distributed in a circular array, all of which are slidably connected to the rotating shell 20, and the swing blades 21 are provided with spaced inclined grooves. The L-shaped frames 30 are fixed with spaced fixed pins, and the fixed pins on the L-shaped frames 30 slide in adjacent inclined grooves in adjacent swing blades 21; counterweights 31, the number of which is consistent with the number of L-shaped frames 30 on the rotating shell 20, are respectively fixed to the L-shaped frames 30 distributed in a circular array, and the counterweights 31 are slidably connected to the rotating shell 20, a spring rod 32 is fixed in the swing blade 21, and the telescopic end of the spring rod 32 is limitedly rotatably connected to the adjacent L-shaped frame 30, and the rotating shell 20 is slidably connected to the sliding frame 40, and the sliding frame 40 is hinged with hinged rods 41 that are consistent with the number of counterweights 31 on the adjacent rotating shells 20, and the hinged rods 41 are hinged to the adjacent counterweights 31.

[0026] In the above scheme, when the fixing pin on the L-shaped frame 30 is located on the side where the adjacent bevel groove in the adjacent swing blade 21 is away from the adjacent rotating shell 20, the swing blade 21 is in an inclined state; when the fixing pin on the L-shaped frame 30 is located on the side where the adjacent bevel groove in the adjacent swing blade 21 is close to the adjacent rotating shell 20, the swing blade 21 is in a vertical state. The switching of the state of the swing blade 21 is achieved by the cooperation between the fixing pin on the L-shaped frame 30 and the bevel groove in the swing blade 21.

[0027] like Figure 4-Figure 6 and Fig. 9As shown, the control component includes: an electric push rod 60, fixedly connected to the first ventilation shell 13; a U-shaped frame 61, slidably connected to the cabinet 10, the telescopic end of the electric push rod 60 is fixedly connected to the U-shaped frame 61, and the symmetrical sliding shells 16 are fixedly connected to the U-shaped frame 61, and the rotating shell 20 and the sliding shell 16 are jointly provided with a speed sensor 50; a guide component is arranged on the first ventilation shell 13, and is used to guide the gas in the first ventilation shell 13.

[0028] In the above scheme, the symmetrical sliding shell 16 is driven to move by the U-shaped frame 61 to switch the cooling mode in the cabinet 10. The speed sensor 50 is composed of a measured gear ring and a sensor. The sensor is fixedly connected to the adjacent sliding shell 16, and the measured gear ring is fixedly connected to the adjacent rotating shell 20.

[0029] like Figure 3 , Figure 4 , Fig.10 and Fig.11 As shown, the air guide component includes: a first air guide shell 70, fixedly connected to and connected to the first ventilation shell 13; an air guide block 71, fixedly connected to the inner side of the first ventilation shell 13, the air guide block 71 is fixedly connected to the first air guide shell 70, and the air guide block 71 is provided with a connecting hole. The first air guide shell 70 is composed of a parallelogram cavity, a rectangular cavity and an arc cavity that are connected to each other. The arc cavity in the first air guide shell 70 is connected to the first ventilation shell 13, and the rectangular cavity of the first air guide shell 70 is located between the parallelogram cavity and the arc cavity above it. The first air guide shell 70 is fixedly connected to and connected with an air outlet pipe, and the air outlet pipe on the first air guide shell 70 is connected to the parallelogram cavity inside it. The arc cavity in the first air guide shell 70 is located on one side inside the first ventilation shell 13 facing downward, and the air guide block 71 is located at the arc cavity in the first air guide shell 70.

[0030] In the above scheme, the connecting holes on the air guide block 71 are used to increase the movement speed of the gas flowing through the air guide block 71 so that the gas can be discharged quickly. The electronic components 12 are composed of a processor and a switch, but in the present invention, there are two electronic components 12, and the first air guide shell 70 is located directly below the processor in the electronic components 12.

[0031] like Fig.10 As shown, the air guide component also includes: an exhaust shell 72, which is fixedly connected to and connected to the first ventilation shell 13, the exhaust shell 72 is located above the first air guide shell 70, and the exhaust shell 72 is provided with a through hole, the exhaust shell 72 is located on one side of the first ventilation shell 13 facing upward, and two trapezoidal blocks are fixedly connected to the first ventilation shell 13, the exhaust shell 72 is located on one side of the first ventilation shell 13 between the two trapezoidal blocks in the first ventilation shell 13, and the exhaust shell 72 passes through the adjacent trapezoidal blocks in the first ventilation shell 13 and is fixedly connected thereto.

[0032] In the above scheme, the exhaust shell 72 is composed of a rectangular shell and a triangular shell fixed to each other. The triangular shell inside the exhaust shell 72 is located in the first ventilation shell 13. The triangular shell of the exhaust shell 72 is located between two trapezoidal blocks in the first ventilation shell 13, and the outlet of the triangular shell in the exhaust shell 72 faces the upper side of the first ventilation shell 13. When the gas flows through the first ventilation shell 13, negative pressure is generated around the exhaust shell 72 on the upper part of the first ventilation shell 13, thereby producing a negative pressure exhaust effect. The exhaust shell 72 is located directly above the processor in the electronic component 12.

[0033] When it is necessary to control the electrical equipment in the tunnel through the cabinet 10, the staff closes the switch door 11 so that the sealing strip on the switch door 11 contacts the cabinet 10, thereby achieving sealing inside the cabinet 10. After the cabinet 10 is kept sealed, the electrical equipment in the tunnel is controlled through the electronic components 12.

[0034] As the electronic components 12 work, they generate heat. At this time, the staff controls the telescopic part of the electric push rod 60 to retract, so that the telescopic part of the electric push rod 60 drives the two sliding shells 16 to move forward through the U-shaped frame 61, so that the two sliding shells 16 slide between the two ventilation shells 15 respectively. At that time, the telescopic part of the electric push rod 60 stops moving.

[0035] The two sliding shells 16 are both located between the two ventilation shells 15, and the ventilation shells 15 are then connected to the adjacent sliding shells 16, and then the staff starts the two driving parts 18, which drive the rotating shell 20 and its accessory parts on its driving shaft to rotate. During the rotation of the rotating shell 20, the measured gear ring in the speed sensor 50 is driven to rotate, and the sensor in the speed sensor 50 remains stationary. The rotation of the measured gear ring in the speed sensor 50 is driven by the rotating shell 20, so that the measured gear ring in the speed sensor 50 responds to the sensor in the speed sensor 50, thereby realizing the monitoring of the rotation speed of the rotating shell 20.

[0036] Taking the movement process of one of the counterweights 31 in the rotating shell 20 as an example, when the rotating shell 20 rotates, the centrifugal force generated prompts the counterweight 31 to overcome the supporting force of the adjacent spring rod 32, and then the counterweight 31 drives the adjacent L-shaped frame 30 to move outward along the rotating shell 20 and squeezes the telescopic portion of the adjacent spring rod 32 (in the process of moving the counterweight 31, the adjacent sliding frame 40 is driven downward by the adjacent hinge rod 41, so that the remaining hinge rods 41 respectively drive the adjacent counterweights 31 to move, so that all the counterweights 31 are moved at the same time, avoiding eccentric rotation in the rotating shell 20). In the process of moving the L-shaped frame 30, the fixed pin thereon squeezes the adjacent inclined groove in the swing blade 21, so that the swing blade 21 swings and gradually tilts, thereby generating a suction force on the gas.

[0037] During the rotation of the rotating shell 20 on the lower side, all the swinging blades 21 thereon are driven to rotate, so that the external air passes through the filter element 17 and the ventilation shell 15 on the lower front side, thereby drawing the external air into the cabinet 10. During the rotation of the rotating shell 20 on the upper side, all the swinging blades 21 thereon are driven to rotate, so that the air in the cabinet 10 passes through the ventilation shell 15 and is discharged. Through the above-mentioned operating steps, the gas circulation in the cabinet 10 is achieved.

[0038] When the driving member 18 on the upper side stops rotating due to its own abnormality (the driving member 18 is damaged), the rotation speed of the rotating shell 20 on the upper side gradually decreases. At this time, the speed sensor 50 transmits a signal to the electric push rod 60, and the electric push rod 60 drives the U-shaped frame 61 to move backward, so that the U-shaped frame 61 drives the two sliding shells 16 to move to contact the upper side of the second ventilation shell 14 and the lower side of the first ventilation shell 13 respectively, so as to realize the replacement of the ventilation channel.

[0039] After the rotation speed of the rotating shell 20 located on the upper side decreases, the spring rod 32 drives the adjacent L-shaped frame 30 to reset and move. During the movement of the L-shaped frame 30, the fixing pin thereon reversely squeezes the inclined groove in the adjacent swing blade 21, so that the swing blade 21 resets and swings. During the movement of the L-shaped frame 30, the counterweight block 31 drives the adjacent hinge rod 41 to reset. Through the cooperation of the hinge rod 41 and the adjacent sliding frame 40, all the counterweight blocks 31 in the rotating shell 20 can be reset and moved at the same time. When the driving shaft of the upper driving member 18 stops rotating completely, the rotating shell 20 located on the upper side stops rotating, and the status of the parts in the rotating shell 20 can refer to Figure 6 and Figure 7 , through the change of the above parts, the switching of the ventilation duct is realized.

[0040] The rotating shell 20 on the lower side and the swinging blades 21 thereon draw the external air into the first ventilation shell 13 through the filter element 17 on the rear side during the rotation process, and the first ventilation shell 13 guides the air. When the air passes through the two first air guide shells 70, part of the gas continues to move upward between the two first air guide shells 70, and the other part of the gas enters the two first air guide shells 70. When the gas enters the arc cavity in the first air guide shell 70, part of the gas entering the arc cavity in the first air guide shell 70 enters the rectangular cavity of the first air guide shell 70, and then enters the parallelogram cavity in the first air guide shell 70, and is discharged through the air outlet pipe on the first air guide shell 70. When exhausting the air through the air outlet pipe on the first air guide shell 70, the electronic components 12 are directly cooled, focusing on reducing the temperature around the electronic components 12, and the gas discharged through the air outlet pipe on the first air guide shell 70 blows the hot air emitted by the electronic components 12 upward, increasing the speed of the hot air flowing upward, so as to enhance the cooling efficiency of the electronic components 12.

[0041] Another part of the gas in the arc-shaped cavity of the first air guide shell 70 is guided by the connecting holes in the air guide block 71. When it is ejected from the connecting holes in the air guide block 71, the speed of gas outflow is accelerated, thereby increasing the flow rate of the gas in the first ventilation shell 13. The gas moving upward between the two first air guide shells 70 immediately passes through the two exhaust shells 72, and then enters the bellows 131 and is ejected from the bellows 131.

[0042] When the gas passes through the exhaust shell 72, negative pressure is generated in the exhaust shell 72 (according to the Bernoulli effect, when the gas flows through the two trapezoidal blocks in the upper part of the first ventilation shell 13, the flow area is reduced, and the flow rate of the gas is increased, thereby reducing the pressure here, thereby achieving the effect of negative pressure extraction), so that the gas around the exhaust shell 72 can enter the exhaust shell 72 through the through holes on the exhaust shell 72, thereby realizing the active extraction of the gas on the upper side of the electronic components 12, further reducing the residence time of the hot air around the electronic components 12, and through the above steps, emergency treatment in the cabinet 10 is achieved.

[0043] When the speed of the rotating shell 20 on the lower side decreases, the above switching steps can be repeated. The difference from the above is that the output shaft of the upper driving member 18 rotates in the opposite direction, so that the gas enters the second ventilation shell 14 through the filter element 17 on the upper rear side, and enters the first ventilation shell 13 through the second ventilation shell 14. The subsequent steps and effects are consistent with the above.

[0044] When the staff finds the abnormality in the cabinet 10 , they go to the site to replace the damaged parts and restore the ventilation mode by the two ventilation shells 15 .

[0045] Embodiment 2: Based on embodiment 1, Figure 2 and Fig.12 As shown, it also includes: a second air guide shell 80, which is fixedly connected to the switch door 11, one side of the second air guide shell 80 is an air inlet, and the other side of the second air guide shell 80 is an air outlet, the bellows 131 is fixedly connected and connected to the second air guide shell 80, the bellows 131 is fixedly connected and connected with a bent pipe located in the second air guide shell 80, and the bent pipe of the bellows 131 is located on one side of the second air guide shell 80 facing the air outlet of the second air guide shell 80, and a fixing ring is fixedly connected to the middle part of the second air guide shell 80, the cross-section of the fixing ring of the second air guide shell 80 is trapezoidal, and the bent pipe of the bellows 131 is located in the fixing ring in the middle part of the second air guide shell 80.

[0046] In the above scheme, when the present invention is used to control the opening or closing of the power equipment in the tunnel, the staff places the cabinet 10 in an embedded manner (existing placement method) in the tunnel. During the placement process, the second air guide shell 80 is exposed to the tunnel. Ventilation equipment is usually installed in the existing tunnel, and the ventilation direction of the ventilation equipment is consistent with the driving direction of the car. Therefore, the air inlet of the second air guide shell 80 corresponds to the air inlet of the tunnel, and the air outlet of the second air guide shell 80 corresponds to the air outlet of the tunnel.

[0047] Working principle: the gas discharged through the bellows 131 enters the second air guide shell 80, and the gas in the tunnel enters the second air guide shell 80 from the left side and is ejected from the right side. When the airflow passes through the second air guide shell 80, the bellows 131 is subjected to negative pressure extraction (according to the Bernoulli effect, when the gas flows through the arc ring in the middle of the second air guide shell 80, the cross-section of the fixed ring in the middle of the second air guide shell 80 is trapezoidal, so that the gas flow area is reduced and the flow rate of the gas is increased when the gas flows through the fixed ring in the middle of the second air guide shell 80, thereby reducing the pressure here and achieving the effect of negative pressure extraction), speeding up the outflow speed of the gas in the bellows 131, thereby enhancing the cooling efficiency, and when the gas is discharged through the bend on the bellows 131, it is directly ejected from the air outlet of the second air guide shell 80, so as to avoid impurities carried by the second air guide shell 80 entering the bellows 131 when the gas in the bellows 131 is discharged.

[0048] The second air guide shell 80 assists in the exhaust of gas in the cabinet 10 and the emergency cooling of the electronic components 12 mentioned in Example 1, so that the cabinet 10 maintains a stable gas flow and the electrical components in the cabinet 10 operate normally.

[0049] Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation shall fall within the protection scope of the present invention.

Claims

1. A PLC control cabinet with a dustproof structure for a tunnel, comprising: Cabinet (10); A switch door (11) is rotatably connected to the cabinet (10), the switch door (11) being fixedly connected to a sealing strip for keeping the cabinet (10) sealed, and electronic components (12) are placed in the cabinet (10), wherein the switch door (11) further comprises: A first ventilation shell (13) is fixedly connected inside the cabinet (10), wherein the first ventilation shell (13) is fixedly connected to and communicates with a bellows (131) that passes through the switch door (11) and is fixedly connected thereto; A second ventilation shell (14) is fixedly connected to the cabinet (10) and is in communication with the first ventilation shell (13); Symmetrical ventilation shells (15) are all fixedly connected to and communicated with the cabinet (10); the symmetrical ventilation shells (15) are all slidably connected to sliding shells (16); one of the sliding shells (16) is slidably connected to the second ventilation shell (14); the other sliding shell (16) is slidably connected to the first ventilation shell (13); the second ventilation shell (14), the first ventilation shell (13) and the symmetrical ventilation shells (15) are all fixedly connected to filter elements (17); and a driving element (18) is provided in the sliding shell (16); An air induction component, arranged in the sliding shell (16) and used for guiding wind; A control component is arranged in the cabinet (10) and is used to control the movement of all the sliding shells (16).

2. A PLC control cabinet with a dustproof structure for tunnel according to claim 1, characterized in that: The air induction component comprises: The rotating shell (20) is fixedly connected to the driving shaft of the driving member (18); the rotating shell (20) is rotatably connected to swing blades (21) distributed in a ring array, and wind force is controlled by changing the swing angle of the swing blades (21).

3. The PLC control cabinet with dustproof structure for tunnel according to claim 2 is characterized in that: The air induction component also includes: L-shaped frames (30) distributed in a ring array are all slidably connected to the rotating shell (20), the swing blades (21) are provided with spaced oblique grooves, the L-shaped frames (30) are fixed with spaced fixing pins, and the fixing pins on the L-shaped frames (30) slide in adjacent oblique grooves in adjacent swing blades (21); The number of the counterweight blocks (31) is the same as the number of the L-shaped frames (30) on the rotating shell (20), and they are respectively fixed to the L-shaped frames (30) distributed in a ring array, and the counterweight blocks (31) are slidably connected to the rotating shell (20), and a spring rod (32) is fixed inside the swing blade (21), and the telescopic end of the spring rod (32) is connected to the adjacent L-shaped frame (30) in a limited rotational manner.

4. The PLC control cabinet with dustproof structure for tunnel according to claim 3 is characterized by: The rotating shell (20) is slidably connected to a sliding frame (40), the sliding frame (40) is hinged with hinged rods (41) having the same number as the counterweight blocks (31) on the adjacent rotating shell (20), and the hinged rods (41) are hinged to the adjacent counterweight blocks (31).

5. The PLC control cabinet with dustproof structure for tunnel according to claim 4 is characterized in that: The control component comprises: An electric push rod (60) fixedly connected to the first ventilation shell (13); A U-shaped frame (61) is slidably connected to the cabinet (10), the telescopic end of the electric push rod (60) is fixedly connected to the U-shaped frame (61), the symmetrical sliding shells (16) are both fixedly connected to the U-shaped frame (61), and the rotating shell (20) and the sliding shell (16) are jointly provided with a rotation speed sensor (50); A flow guide component is arranged on the first ventilation shell (13) and is used to guide the gas in the first ventilation shell (13).

6. The PLC control cabinet with dustproof structure for tunnel according to claim 5 is characterized in that: The flow guide assembly comprises: A first air guide shell (70) fixedly connected to and in communication with the first ventilation shell (13); An air guide block (71) is fixedly connected to the inner side of the first ventilation shell (13); the air guide block (71) is fixedly connected to the first air guide shell (70); and the air guide block (71) is provided with a communication hole.

7. A PLC control cabinet with a dustproof structure for use in a tunnel according to claim 6, characterized in that: The first air guide shell (70) is composed of a parallelogram cavity, a rectangular cavity and an arc cavity that are interconnected. The arc cavity in the first air guide shell (70) is connected to the first ventilation shell (13). The rectangular cavity of the first air guide shell (70) is located between the parallelogram cavity and the arc cavity above it. The first air guide shell (70) is fixedly connected to and connected to an air outlet pipe. The air outlet pipe on the first air guide shell (70) is connected to the parallelogram cavity inside it. The arc cavity in the first air guide shell (70) is located on one side of the first ventilation shell (13) facing downward. The air guide block (71) is located at the arc cavity in the first air guide shell (70).

8. The PLC control cabinet with dustproof structure for tunnel according to claim 6 is characterized in that: The flow guide assembly also includes: An exhaust shell (72) is fixedly connected to and communicated with the first ventilation shell (13); the exhaust shell (72) is located above the first air guide shell (70); the exhaust shell (72) is provided with a through hole; the exhaust shell (72) is located on one side of the first ventilation shell (13) facing upward; two trapezoidal blocks are fixedly connected to the first ventilation shell (13); the exhaust shell (72) is located on one side of the first ventilation shell (13) between the two trapezoidal blocks in the first ventilation shell (13); and the exhaust shell (72) passes through adjacent trapezoidal blocks in the first ventilation shell (13) and is fixedly connected thereto.

9. A PLC control cabinet with dustproof structure for tunnel according to claim 1, characterized in that: include: The second air guide shell (80) is fixedly connected to the switch door (11); one side of the second air guide shell (80) is an air inlet portion; the other side of the second air guide shell (80) is an air outlet portion; and the bellows (131) is fixedly connected to and communicates with the second air guide shell (80).

10. The PLC control cabinet with dustproof structure for tunnel according to claim 9 is characterized in that: The bellows (131) is fixedly connected to and communicates with a bent pipe located in the second air guide shell (80), and the bent pipe of the bellows (131) is located on one side of the second air guide shell (80) facing the air outlet of the second air guide shell (80), a fixing ring is fixedly connected to the middle of the second air guide shell (80), the cross-section of the fixing ring of the second air guide shell (80) is trapezoidal, and the bent pipe of the bellows (131) is located in the fixing ring in the middle of the second air guide shell (80).

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