A low voltage cabinet protection structure for a substation

Abstract

The application discloses a low-voltage cabinet protection structure for a transformer substation, and relates to the technical field of low-voltage cabinets, which comprises a cabinet body, two threaded rods rotatably connected to the cabinet body, mounting plates threadedly connected to the threaded rods, and a fire extinguishing mechanism arranged on the mounting plates and the cabinet body. When a fire occurs in the low-voltage cabinet, the fire triggers the starting mechanism, and then the starting mechanism starts to control the first motor to work. The first motor drives the mounting plates and the fire extinguishing mechanism to move rapidly through the threaded rods, so that the fire extinguishing mechanism is accurately and rapidly moved to the fire position. Then, the fire extinguishing device sprays a large amount of carbon dioxide gas to the fire position to accurately extinguish the fire, thereby greatly improving the fire extinguishing effect in the low-voltage cabinet, timely controlling the fire, reducing the damage degree of components in the low-voltage cabinet, and further improving the protection effect of the low-voltage cabinet.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of low-voltage cabinets, in particular to a low-voltage cabinet protection structure for a substation. BACKGROUND

[0002] The rated current of the low-voltage distribution cabinet of the substation is a power, lighting and distribution power conversion and control system with a rated voltage of 380v and a rated frequency of 50Hz. The product has the characteristics of strong breaking capacity, good dynamic and thermal stability, flexible electrical scheme, convenient combination, strong series and practicality, and novel structure.

[0003] At present, when the low-voltage distribution cabinet used in the substation is used, due to the simple structure of the low-voltage cabinet, when the components in the low-voltage distribution cabinet are overloaded and burned out, combustion will occur in the low-voltage distribution cabinet. When this fire occurs, the fire in the low-voltage distribution cabinet cannot be extinguished in time, the internal components are poorly protected, the fire will burn other components in the low-voltage distribution cabinet or cause a serious fire, thereby causing great loss. SUMMARY

[0004] The purpose of the present application is to provide a low-voltage cabinet protection structure for a substation to solve the problems in the background art.

[0005] The purpose of the present application can be achieved by the following technical solutions:

[0006] A low-voltage cabinet protection structure for a substation, comprising a cabinet body and two threaded rods rotatably connected to the cabinet body, the two threaded rods being drivingly connected by a transmission wheel and a transmission belt, one end of one of the threaded rods being fixedly connected to a first motor fixedly connected to the cabinet body, and the threaded rod being threadedly connected to a mounting plate;

[0007] A fire extinguishing mechanism is provided on the mounting plate and the cabinet body, and the fire extinguishing mechanism is used to extinguish the fire source in the cabinet body;

[0008] A ventilation and heat dissipation mechanism is provided on the cabinet body, and the ventilation and heat dissipation mechanism is used to supply air to the cabinet body.

[0009] As a further scheme of the present application: the fire extinguishing mechanism comprises a first mounting pipe fixedly connected with the mounting plate, a fire extinguishing cover fixedly connected with the first mounting pipe, a plurality of first plastic hoses fixedly connected with the first mounting pipe through threaded pipes, a first spring fixedly connected in the cabinet, a first transmission plate fixedly connected with the top end of the first spring, a first air bag connected with the cabinet and arranged below the first transmission plate, a first hose fixedly connected with the first mounting pipe and fixedly connected with the outer surface of the first air bag, a first control switch fixedly connected with the cabinet, a carbon dioxide gas tank fixedly connected with the cabinet, a second hose fixedly connected with the first mounting pipe and fixedly connected with the output end of the carbon dioxide gas tank, and an electromagnetic valve arranged on the second hose.

[0010] The cabinet is provided with a starting mechanism for controlling the operation of the first motor, and the starting mechanism is used for timely discovering the fire in the cabinet and controlling the first motor to work.

[0011] As a further scheme of the present application: the starting mechanism comprises a mounting box fixedly connected with the cabinet, a second air bag fixedly connected in the mounting box, a second mounting pipe fixedly connected with the output end of the second air bag, a plurality of second plastic hoses fixedly connected with the outer surface of the second mounting pipe through threaded pipes, a pressing plate slidingly connected in the mounting box, a second spring fixedly connected with the mounting box and fixedly connected with the bottom of the pressing plate, and a second control switch fixedly connected in the mounting box.

[0012] As a further scheme of the present application: the top and the bottom of the cabinet are provided with first ventilation holes, the top of the first transmission plate is fixedly connected with a transmission column slidingly connected with the cabinet, the top end of the transmission column is fixedly connected with a second transmission plate, the bottom of the first transmission plate and the second transmission plate are fixedly connected with sealing columns slidingly connected with the first ventilation holes, the bottom of the second transmission plate is fixedly connected with a third spring fixedly connected with the cabinet, and the first transmission plate and the second transmission plate are provided with second ventilation holes.

[0013] As a further scheme of the present application: the ventilation and heat dissipation mechanism comprises an air inlet cover fixedly connected with the cabinet, a first air inlet pipe fixedly connected with the bottom of the air inlet cover, a dehumidification box fixedly connected with the cabinet and fixedly connected with one end of the first air inlet pipe, a second air inlet pipe fixedly connected with the top of the dehumidification box, an air inlet box fixedly connected with the cabinet and fixedly connected with one end of the second air inlet pipe, a second motor fixedly connected with the air inlet box, a first transmission shaft fixedly connected with the output end of the second motor through a shaft coupling, a fan blade fixedly connected with the outer surface of the first transmission shaft, and a first filter screen plate fixedly connected with the first transmission shaft and rotatingly connected with the air inlet box.

[0014] The outer surface of the first transmission shaft is transmissionally connected with a drying disturbance mechanism connected with the dehumidification box, and the drying disturbance mechanism is used for drying the drying agent in the dehumidification box.

[0015] As a further scheme of the present application, the drying disturbance mechanism comprises a second transmission shaft rotationally connected with the dehumidification box, the first transmission shaft and the second transmission shaft are transmissionally connected through a transmission wheel and a transmission belt, the outer surface of the second transmission shaft is fixedly sleeved with a first gear, the outer surface of the first gear is meshingly connected with a second gear, the middle of the second gear is fixedly sleeved with a third transmission shaft rotationally connected with the dehumidification box, the outer surface of the third transmission shaft is fixedly connected with a plurality of stirring rods, a plurality of electric heating plates are fixedly connected in the dehumidification box, and a heat dissipation hole is formed in the top of the dehumidification box.

[0016] As a further scheme of the present application, the outer surface of the first transmission shaft is fixedly connected with a cleaning brush slidingly connected with the first filter screen plate.

[0017] As a further scheme of the present application, one end of the first air inlet pipe is fixedly connected with a filter screen.

[0018] As a further scheme of the present application, the top of the cabinet body is fixedly connected with a shielding plate.

[0019] As a further scheme of the present application, the top of the cabinet body is fixedly connected with an exhaust pipe, and an electromagnetic valve is arranged on the exhaust pipe.

[0020] The present application has the following beneficial effects:

[0021] (1) When a fire occurs in the low-voltage cabinet, the fire-triggered starting mechanism is started, and then the starting mechanism starts to control the first motor to work, the first motor drives the mounting plate and the fire extinguishing mechanism to move quickly through the threaded rod, so that the fire extinguishing mechanism accurately and quickly moves to the fire position, and then the fire extinguishing device sprays a large amount of carbon dioxide gas to the fire position to accurately extinguish the fire, greatly improving the fire extinguishing effect in the low-voltage cabinet, timely controlling the fire, reducing the damage degree of components in the low-voltage cabinet, and further improving the protection effect of the low-voltage cabinet.

[0022] (2) When a fire occurs, the first transmission plate moves downward, the first transmission plate drives the second transmission plate to move downward through the transmission column, the sealing columns on the first transmission plate and the second transmission plate are inserted into the first ventilation hole, air cannot enter the cabinet body, the oxygen content in the cabinet body is reduced, the fire in the cabinet body is blocked faster, and the protection effect of the low-voltage cabinet is further improved.

[0023] (3) The outside air is filtered through the ventilation and heat dissipation mechanism, and then the filtered air is introduced into the dehumidification box. The moisture in the air is then fully dried by the silica gel desiccant in the dehumidification box, and then introduced into the cabinet to dissipate heat in the cabinet. This achieves heat dissipation by drying the air in the cabinet, reducing the damage of the components in the cabinet to the moisture in the air, and improving the heat dissipation effect of the low-voltage cabinet.

[0024] (4) By controlling the second motor to rotate slowly, the electric heating plate in the dehumidification box is heated, and the second motor drives the first transmission shaft to rotate slowly. The first transmission shaft drives the second transmission shaft to rotate, and the second transmission shaft drives the third transmission shaft and the stirring rod to rotate through the first gear and the second gear, so that the desiccant in the dehumidification box is fully heated and dried. The dried moisture is discharged from the heat dissipation hole, thereby realizing the reuse of the desiccant in the dehumidification box. Attached Figure Description

[0025] The invention will now be further described with reference to the accompanying drawings.

[0026] Figure 1 This is a first perspective view of the external structure of the present invention;

[0027] Figure 2 This is a second perspective view of the external structure of the present invention;

[0028] Figure 3 This is a third perspective view of the external structure of the present invention;

[0029] Figure 4 This is a front view of the internal structure of the mounting box of the present invention;

[0030] Figure 5 This is a front view of the internal structure of the dehumidification box and air inlet box of the present invention;

[0031] Figure 6 This is the present invention. Figure 2 Enlarged view of A in the middle;

[0032] Figure 7 This is the present invention. Figure 1 Enlarged view of B in the middle;

[0033] Figure 8 This is the present invention. Figure 3 A magnified view of C.

[0034] In the figure: 1, cabinet body; 2, threaded rod; 3, first motor; 4, mounting plate; 11, first mounting pipe; 12, fire extinguishing cover; 13, first plastic hose; 14, first spring; 15, first transmission plate; 16, first air bag; 17, first hose; 18, first control switch; 19, carbon dioxide gas tank; 190, second hose; 21, mounting box; 22, second air bag; 23, second mounting pipe; 24, second plastic hose; 25, pressing plate; 26, second spring; 27, second control switch; 31, first ventilation hole; 32, transmission column; 33, second transmission plate; 34, sealing column; 35, third spring; 36, second ventilation hole; 41, air inlet cover; 42, first air inlet pipe; 43, dehumidification box; 44, second air inlet pipe; 45, air inlet box; 46, second motor; 47, first transmission shaft; 48, fan blade; 49, first filter screen; 490, cleaning brush; 51, second transmission shaft; 52, first gear; 53, second gear; 54, third transmission shaft; 55, stirring rod; 56, electric heating plate; 57, heat dissipation hole. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0036] Embodiment one

[0037] Please refer to Figures 1-8 As shown in the figure, the present application is a low-voltage cabinet protection structure for a transformer substation, which comprises a cabinet body 1 and two threaded rods 2 rotatably connected to the cabinet body 1. The two threaded rods 2 are drivingly connected through a transmission wheel and a transmission belt. One end of one of the threaded rods 2 is fixedly connected with a first motor 3 fixedly connected with the cabinet body 1 through a shaft coupling. The first motor 3 is controlled by a PLC programming program, which can control the threaded rod 2 of the first motor 3 to threadedly cooperate with a mounting plate 4. The mounting plate 4 is provided with a fire extinguishing mechanism connected with the cabinet body 1. The fire extinguishing mechanism is used for extinguishing the fire source in the cabinet body 1. A ventilation and heat dissipation mechanism is arranged in the cabinet body 1, which is used for supplying air to the cabinet body 1. A baffle plate is fixedly connected to the top of the cabinet body 1. An exhaust pipe is arranged on the top of the cabinet body 1, and an electromagnetic valve is arranged on the exhaust pipe.

[0038] The fire extinguishing mechanism accurately and automatically monitors the position of the fire in the low-voltage cabinet, then drives the threaded rod 2 to rotate through the first motor 3, the threaded rod 2 drives the mounting plate 4 to move, the mounting plate 4 drives the fire extinguishing mechanism to move to the position of the fire to extinguish the fire in time, greatly improving the accuracy of extinguishing the fire in the low-voltage cabinet, further improving the safety of the low-voltage cabinet work, and at the same time in the daily use process, the dry outside cold air is supplied into the low-voltage cabinet through the ventilation and heat dissipation mechanism, and the moisture in the outside air is filtered, further improving the heat dissipation effect in the low-voltage cabinet.

[0039] Embodiment two

[0040] On the basis of embodiment one, please refer to Figure 1 、 Figure 2 、 Figure 4 and Figure 6 , the fire extinguishing mechanism includes a first mounting pipe 11 fixedly connected with the mounting plate 4, a fire extinguishing cover 12 fixedly connected with the first mounting pipe 11, a plurality of first plastic hoses 13 fixedly connected with the first mounting pipe 11 through threaded pipes, a first spring 14 fixedly connected in the cabinet 1, a first transmission plate 15 fixedly connected with the top end of the first spring 14, a first air bag 16 connected with the cabinet 1 below the first transmission plate 15, a first hose 17 fixedly connected with the first mounting pipe 11 on the outer surface of the first air bag 16, a first control switch 18 fixedly connected with the cabinet 1, a carbon dioxide gas tank 19 fixedly connected with the cabinet 1, a second hose 190 fixedly connected with the first mounting pipe 11 at the output end of the carbon dioxide gas tank 19, an electromagnetic valve provided on the second hose 190, a starting mechanism provided on the cabinet 1 for controlling the operation of the first motor 3, the starting mechanism is used for discovering the fire in the cabinet 1 in time and controlling the first motor 3 to work, the starting mechanism includes a mounting box 21 fixedly connected with the cabinet 1, a second air bag 22 fixedly connected in the mounting box 21, a second mounting pipe 23 fixedly connected with the output end of the second air bag 22, a plurality of second plastic hoses 24 fixedly connected with the outer surface of the second mounting pipe 23 through threaded pipes, a pressing plate 25 slidingly connected in the mounting box 21, a second spring 26 fixedly connected with the mounting box 21 at the bottom of the pressing plate 25, and a second control switch 27 fixedly connected in the mounting box 21.

[0041] When the fire occurs in the cabinet 1, the burning flame burns one of the second plastic hoses 24 on the second installation pipe 23, the second plastic hose 24 is burned, the second plastic hose 24 is deflated, the second air bag 22 in the installation box 21 starts to shrink, the pressing plate 25 in the installation box 21 moves under the action of the second spring 26 and starts to press the second control switch 27 in the installation box 21, the second control switch 27 starts to trigger, the second control switch 27 starts to control the first motor 3 to work, the first motor 3 drives the threaded rod 2 to rotate, the threaded rod 2 drives the installation plate 4 to move upward rapidly, when the first plastic hose 13 on the first installation pipe 11 on the installation plate 4 moves to the fire position, the first plastic hose 13 is burned and melted by the fire, the first air bag 16 is deflated and shrinks, the first transmission plate 15 moves downward under the action of the first spring 14, and the first transmission plate 15 starts to trigger the first control switch 18 on the cabinet 1, the first control switch 18 closes the first motor 3 to work, so that the installation plate 4 stops moving, the fire extinguishing cover 12 on the first installation pipe 11 on the installation plate 4 moves to the fire position, the electromagnetic valve on the second hose 190 is opened, the carbon dioxide gas in the carbon dioxide tank 19 enters the first installation pipe 11 through the second hose 190, and then a large amount of carbon dioxide gas is blown into the position where the fire occurs through the fire extinguishing cover 12 on the first installation pipe 11 to accurately extinguish the fire, so that the fire is timely controlled and the damage degree of the low-voltage cabinet is reduced.

[0042] Embodiment three

[0043] On the basis of embodiment two, please refer to Figure 1 Figure 2 and Figure 7 As shown in the drawings, the top and bottom of the cabinet 1 are provided with first ventilation holes 31, the top of the first transmission plate 15 is fixedly connected with a transmission column 32 which is slidably connected with the cabinet 1, the top end of the transmission column 32 is fixedly connected with a second transmission plate 33, the bottom of the first transmission plate 15 and the second transmission plate 33 are fixedly connected with sealing columns 34 which are slidably connected with the first ventilation holes 31, the bottom of the second transmission plate 33 is fixedly connected with a third spring 35 which is fixedly connected with the cabinet 1, and the first transmission plate 15 and the second transmission plate 33 are provided with second ventilation holes 36.

[0044] When the fire occurs, the installation plate 4 moves to the fire position, and the first air bag 16 is deflated and reduced in size. At this time, the first transmission plate 15 moves downward under the action of the first spring 14, and the first transmission plate 15 drives the second transmission plate 33 to move downward through the transmission column 32. The sealing column 34 on the first transmission plate 15 and the second transmission plate 33 is inserted into the first ventilation hole 31, the first ventilation hole 31 at the top and bottom of the cabinet 1 is closed, the air cannot enter the cabinet 1, the oxygen content in the cabinet 1 is reduced, and the fire in the cabinet 1 is blocked faster, thereby further improving the protection effect of the cabinet 1.

[0045] Embodiment four

[0046] On the basis of embodiment three, please refer to Figure 2 、 Figure 3 、 Figure 5 and Figure 8 , the ventilation and heat dissipation mechanism includes an air inlet cover 41 fixedly connected with the cabinet 1, a first air inlet pipe 42 fixedly connected at the bottom of the air inlet cover 41, a filter screen fixedly connected at one end of the first air inlet pipe 42, a dehumidification box 43 fixedly connected at one end of the first air inlet pipe 42 and fixedly connected with the cabinet 1, silica gel desiccant contained in the dehumidification box 43, a second air inlet pipe 44 fixedly connected at the top of the dehumidification box 43, an air inlet box 45 fixedly connected at one end of the second air inlet pipe 44 and fixedly connected with the cabinet 1, a second motor 46 fixedly connected on the air inlet box 45, the second motor 46 being controlled by a PLC programming program to control the second motor 46 to rotate forward and reverse and the rotation angle, a first transmission shaft 47 fixedly connected at the output end of the second motor 46 through a shaft coupling, a fan blade 48 fixedly connected on the outer surface of the first transmission shaft 47, a first filter screen plate 49 fixedly connected in the air inlet box 45 and rotatably connected with the first transmission shaft 47, and a cleaning brush 490 fixedly connected on the outer surface of the first transmission shaft 47 and slidably connected with the first filter screen plate 49;

[0047] The outer surface of the first transmission shaft 47 is drivingly connected with a drying disturbance mechanism connected with the dehumidification box 43, and the drying disturbance mechanism is used for drying the desiccant in the dehumidification box 43;

[0048] The drying disturbance mechanism includes a second transmission shaft 51 rotatably connected with the dehumidification box 43, the first transmission shaft 47 and the second transmission shaft 51 being drivingly connected through a transmission wheel and a transmission belt, a first gear 52 fixedly sleeved on the outer surface of the second transmission shaft 51, a second gear 53 meshingly connected on the outer surface of the first gear 52, a third transmission shaft 54 rotatably sleeved in the middle of the second gear 53 and rotatably connected with the dehumidification box 43, a plurality of stirring rods 55 fixedly connected on the outer surface of the third transmission shaft 54, a plurality of electric heating plates 56 fixedly connected in the dehumidification box 43, and a heat dissipation hole 57 formed at the top of the dehumidification box 43;

[0049] The first transmission shaft 47 drives the fan blade 48 to rotate, and the fan blade 48 blows air into the air inlet box 45. Then, the first filter screen 49 filters dust and sundries in the air. The filtered air enters the dehumidification box 43 through the second air inlet pipe 44. Then, the silica gel desiccant in the dehumidification box 43 dries the moisture in the air. During the drying process, the first transmission shaft 47 drives the second transmission shaft 51 to rotate. The second transmission shaft 51 drives the third transmission shaft 54 to rotate through the first gear 52 and the second gear 53. The third transmission shaft 54 drives the stirring rod 55 to rotate. The stirring rod 55 slowly stirs the silica gel desiccant in the dehumidification box 43, so that the desiccant fully contacts with the moisture in the air, greatly improving the drying effect of the air. The dried air enters the air inlet hood 41 through the first air inlet pipe 42. Then, the air inlet hood 41 supplies the air into the cabinet 1 through the first air vent 31. Then, the air enters the cabinet 1 through the second air vent 36 on the first transmission plate 15 in the cabinet 1, blowing and cooling the components in the cabinet 1. The hot air after cooling is discharged through the second air vent 36 at the top of the cabinet 1, so as to realize drying and cooling of the air in the cabinet 1, reducing the damage of the moisture in the air to the components in the cabinet 1.

[0050] At the same time, every time interval, the second motor 46 is controlled to rotate slowly, and the electric heating plate 56 in the dehumidification box 43 is electrically heated. At the same time, the second motor 46 drives the first transmission shaft 47 to rotate slowly. The first transmission shaft 47 drives the second transmission shaft 51 to rotate. The second transmission shaft 51 drives the third transmission shaft 54 and the stirring rod 55 to rotate through the first gear 52 and the second gear 53, so that the desiccant in the dehumidification box 43 is fully heated and dried. The dried moisture is discharged from the heat dissipation hole 57, so as to realize repeated use of the desiccant in the dehumidification box 43.

[0051] The working principle of the present application: when the fire occurs in the cabinet 1, at this time the burning flame burns to one of the second plastic hose 24 on the second installation pipe 23, at this time the second plastic hose 24 is burned, at this time the second plastic hose 24 deflates, at this time the second air bag 22 in the installation box 21 starts to shrink, at this time the pressing plate 25 in the installation box 21 moves under the action of the second spring 26 and starts to press the second control switch 27 in the installation box 21, the second control switch 27 starts to trigger, at this time the second control switch 27 starts to control the first motor 3 to work, the first motor 3 drives the threaded rod 2 to rotate, the threaded rod 2 drives the mounting plate 4 to move upward rapidly, when the first plastic hose 13 on the first installation pipe 11 on the mounting plate 4 moves to the fire position, at this time the first plastic hose 13 is burned and melted, at this time the first air bag 16 deflates and shrinks, at this time the first transmission plate 15 moves downward under the action of the first spring 14, at the same time the first transmission plate 15 starts to trigger the first control switch 18 on the cabinet 1, the first control switch 18 closes the first motor 3 to work, so that the mounting plate 4 stops moving, at this time the fire extinguishing cover 12 on the first installation pipe 11 on the mounting plate 4 moves to the fire position, at this time the electromagnetic valve on the second hose 190 opens, the carbon dioxide gas in the carbon dioxide gas tank 19 enters the first installation pipe 11 through the second hose 190, and then a large amount of carbon dioxide gas is blown into the position where the fire occurs through the fire extinguishing cover 12 on the first installation pipe 11 to accurately extinguish the fire, so that the fire is timely controlled, and the damage degree of the components in the low-voltage cabinet is reduced.

[0052] The first transmission shaft 47 drives the fan blade 48 to rotate, and the fan blade 48 blows air into the air inlet box 45. Then, the first filter screen 49 filters dust and sundries in the air. The filtered air enters the dehumidifying box 43 through the second air inlet pipe 44. Then, the silica gel drying agent in the dehumidifying box 43 dries the moisture in the air. During the drying process, the first transmission shaft 47 drives the second transmission shaft 51 to rotate. The second transmission shaft 51 drives the third transmission shaft 54 to rotate through the first gear 52 and the second gear 53. The third transmission shaft 54 drives the stirring rod 55 to rotate. The stirring rod 55 slowly stirs the silica gel drying agent in the dehumidifying box 43, so that the drying agent fully contacts with the moisture in the air, greatly improving the drying effect of the air. The dried air enters the air inlet cover 41 through the first air inlet pipe 42. Then, the air inlet cover 41 supplies the air into the cabinet 1 through the first air vent 31. Then, the air enters the cabinet 1 through the second air vent 36 on the first transmission plate 15 in the cabinet 1, blows and cools the components in the cabinet 1. The hot air after cooling is discharged through the second air vent 36 on the top of the cabinet 1, so as to realize the drying and cooling of the air in the cabinet 1, and reduce the damage of the moisture in the air to the components in the cabinet 1.

[0053] The above describes one embodiment of the present application in detail, but the above description is only a preferred embodiment of the present application, and cannot be considered as limiting the scope of the present application. Any equivalent changes and improvements made according to the scope of the present application should still belong to the scope of the present application.

Claims

1. A low voltage cubicle protection structure for a substation, characterized in that, Including cabinet (1) and two threaded rods (2) rotatably connected on the cabinet (1), the two threaded rods (2) are drivingly connected through transmission wheel and transmission belt, one end of one of the threaded rods (2) is fixedly connected with the first motor (3) fixedly connected with the cabinet (1), the threaded rod (2) is threadedly connected with the mounting plate (4); The fire extinguishing mechanism is arranged on the mounting plate (4) and the cabinet (1), and is used for extinguishing the fire source in the cabinet (1); The ventilation and heat dissipation mechanism is arranged on the cabinet (1), and is used for supplying air to the cabinet (1); The fire extinguishing mechanism includes a first mounting pipe (11) fixedly connected with the mounting plate (4), a fire extinguishing cover (12) fixedly connected with the first mounting pipe (11), a plurality of first plastic hoses (13) fixedly connected with the first mounting pipe (11) through threaded pipes, a first spring (14) fixedly connected in the cabinet (1), a first transmission plate (15) fixedly connected to the top end of the first spring (14), a first air bag (16) connected with the cabinet (1) arranged below the first transmission plate (15), a first hose (17) fixedly connected with the first mounting pipe (11) fixedly connected to the outer surface of the first air bag (16), a first control switch (18) fixedly connected with the cabinet (1), a carbon dioxide gas tank (19) fixedly connected with the cabinet (1), a second hose (190) fixedly connected with the first mounting pipe (11) fixedly connected to the output end of the carbon dioxide gas tank (19), and an electromagnetic valve arranged on the second hose (190); The cabinet (1) is provided with a starting mechanism for controlling the operation of the first motor (3), and the starting mechanism is used for timely discovering the fire in the cabinet and controlling the operation of the first motor (3); The starting mechanism includes a mounting box (21) fixedly connected with the cabinet (1), a second air bag (22) fixedly connected in the mounting box (21), a second mounting pipe (23) fixedly connected to the output end of the second air bag (22), a plurality of second plastic hoses (24) fixedly connected with the outer surface of the second mounting pipe (23) through threaded pipes, a pressing plate (25) slidingly connected in the mounting box (21), a second spring (26) fixedly connected with the mounting box (21) fixedly connected to the bottom of the pressing plate (25), and a second control switch (27) fixedly connected in the mounting box (21). When the fire occurs in the cabinet (1), the burning flame burns one of the second plastic hoses (24) on the second installation pipe (23), at this time the second plastic hose (24) is burned, at this time the second plastic hose (24) is deflated, at this time the second air bag (22) in the installation box (21) starts to shrink, at this time the pressing plate (25) in the installation box (21) moves under the action of the second spring (26) and starts to press the second control switch (27) in the installation box (21), the second control switch (27) starts to trigger, at this time the second control switch (27) starts to control the first motor (3) to work, the first motor (3) drives the threaded rod (2) to rotate, the threaded rod (2) drives the mounting plate (4) to move upward rapidly, when the first plastic hose (13) on the first installation pipe (11) on the mounting plate (4) moves to the fire position, at this time the first plastic hose (13) is burned and melted, at this time the first air bag (16) is deflated and shrinks, at this time the first transmission plate (15) moves downward under the action of the first spring (14), at the same time the first transmission plate (15) starts to trigger the first control switch (18) on the cabinet (1), the first control switch (18) closes the first motor (3) to work, so that the mounting plate (4) stops moving, at this time the fire cover (12) on the first installation pipe (11) on the mounting plate (4) moves to the fire position, at this time the electromagnetic valve on the second hose (190) is opened, the carbon dioxide gas in the carbon dioxide gas tank (19) enters the first installation pipe (11) through the second hose (190), and then a large amount of carbon dioxide gas is blown into the position where the fire occurs through the fire cover (12) on the first installation pipe (11) to accurately extinguish the fire.

2. A low voltage cubicle protection structure for a substation according to claim 1, characterized in that, The top and bottom of the cabinet (1) are provided with first ventilation holes (31), the top of the first transmission plate (15) is fixedly connected with a transmission column (32) which is slidably connected with the cabinet (1), the top end of the transmission column (32) is fixedly connected with a second transmission plate (33), the bottom of the first transmission plate (15) and the second transmission plate (33) are fixedly connected with sealing columns (34) which are slidably connected with the first ventilation holes (31), the bottom of the second transmission plate (33) is fixedly connected with a third spring (35) which is fixedly connected with the cabinet (1), and the first transmission plate (15) and the second transmission plate (33) are provided with second ventilation holes (36).

3. A low voltage cubicle protection structure for a substation according to claim 1, characterized in that, The ventilation and heat dissipation mechanism comprises an air inlet cover (41) fixedly connected with the cabinet body (1), a first air inlet pipe (42) fixedly connected with the bottom of the air inlet cover (41), a dehumidification box (43) fixedly connected with one end of the first air inlet pipe (42) and the cabinet body (1), a second air inlet pipe (44) fixedly connected with the top of the dehumidification box (43), an air inlet box (45) fixedly connected with one end of the second air inlet pipe (44) and the cabinet body (1), a second motor (46) fixedly connected with the air inlet box (45), a first transmission shaft (47) fixedly connected with the output end of the second motor (46) through a shaft coupling, a fan blade (48) fixedly connected with the outer surface of the first transmission shaft (47), and a first filter screen plate (49) fixedly connected with the first transmission shaft (47) in the air inlet box (45). The outer surface of the first transmission shaft (47) is drivingly connected with a drying disturbance mechanism connected with the dehumidification box (43), and the drying disturbance mechanism is used for drying the drying agent in the dehumidification box (43).

4. A low voltage cubicle protection structure for a substation according to claim 3, characterized in that, The drying disturbance mechanism comprises a second transmission shaft (51) rotatably connected with the dehumidification box (43), the first transmission shaft (47) and the second transmission shaft (51) are drivingly connected through a transmission wheel and a transmission belt, a first gear (52) is fixedly sleeved with the outer surface of the second transmission shaft (51), a second gear (53) is meshingly connected with the outer surface of the first gear (52), a third transmission shaft (54) rotatably connected with the dehumidification box (43) is fixedly sleeved with the middle of the second gear (53), a plurality of stirring rods (55) are fixedly connected with the outer surface of the third transmission shaft (54), a plurality of electric heating plates (56) are fixedly connected in the dehumidification box (43), and a heat dissipation hole (57) is formed in the top of the dehumidification box (43).

5. A low voltage cubicle protection structure for a substation according to claim 3, characterized in that, The outer surface of the first transmission shaft (47) is fixedly connected with a cleaning brush (490) slidingly connected with the first filter screen plate (49).

6. A low voltage cubicle protection structure for a substation according to claim 3, characterized in that, One end of the first air inlet pipe (42) is fixedly connected with a filter screen.

7. A low voltage cubicle protection structure for a substation as claimed in claim 1, wherein, The top of the cabinet body (1) is fixedly connected with a shielding plate.

8. A low voltage cubicle protection structure for a substation according to claim 1, characterized in that, The top of the cabinet body (1) is provided with an exhaust pipe, and the exhaust pipe is provided with an electromagnetic valve. The top of the cabinet body (1) is provided with an exhaust pipe, and the exhaust pipe is provided with an electromagnetic valve.

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