Multi-station charging cabinet for security and protection

Abstract

The invention relates to the technical field of charging cabinets, in particular to a security and protection multi-station charging cabinet which comprises a cabinet body, a cavity is formed in the cabinet body, a cabinet door is rotationally connected to one side in the cavity, a handle is connected to the side wall of the cabinet door, a pressure release valve is embedded in the cabinet door, a mounting plate is fixedly connected to the other side in the cavity, and the mounting plate is fixedly connected to the other side in the cavity. The installation plate and the cabinet door are symmetrically arranged, a ventilation hole is formed in the lower portion of the installation plate, a shell is fixedly connected to the portion, on the outer side of the ventilation hole, of the side wall of the installation plate, a draft fan is installed in the shell, and a ventilation groove is formed in the cabinet body. According to the invention, air in the cabinet body can be extracted through the operation of the draft fan and discharged outwards through the ventilation holes in the mounting plate, and external air enters the cabinet body through the ventilation slots and is blown to the tablet computer along the inclined part of the ventilation slots, so that the tablet computer in charging is cooled.

Description

Technical Field

[0001] The present invention relates to the technical field of charging cabinets, and in particular to a multi-station charging cabinet for security. Background Art

[0002] A charging cabinet refers to a device that can centrally charge a large number of digital electronic products of various types. The internal structure of existing multi-station charging cabinets mostly uses partitions to separate the charging devices. As a result, the charging devices in the multi-station charging cabinet are charged in the same space. When more charging devices are charged at the same time, a large amount of heat will be generated. However, existing multi-station charging cabinets mostly use ventilation holes on them to achieve heat dissipation and cooling. This method has low cooling efficiency, and the probability of fire increases with the increase in temperature. However, existing multi-station charging cabinets do not have better measures to prevent fires. Summary of the invention

[0003] In order to overcome the disadvantage that the existing multi-station charging cabinets achieve heat dissipation and cooling through ventilation holes thereon, this method has low cooling efficiency and the probability of fire increases with the increase in temperature, but the existing multi-station charging cabinets do not have better measures to avoid fire, the present invention provides a multi-station charging cabinet for security.

[0004] The technical implementation scheme of the present invention is: a multi-station charging cabinet for security, comprising a cabinet body, a cavity provided on the cabinet body, a cabinet door is rotatably connected to one side of the cavity, a handle is connected to the side wall of the cabinet door, a pressure relief valve is embedded in the cabinet door, a mounting plate is fixedly connected to the other side of the cavity, the mounting plate and the cabinet door are symmetrically arranged, a ventilation hole is opened at the lower part of the mounting plate, a shell is fixedly connected to the side wall of the mounting plate outside the ventilation hole, an exhaust fan is installed in the shell, a ventilation slot is opened on the cabinet body, and the ventilation slot is located at the lower side of the cabinet door and the mounting plate, a fixing frame is fixedly connected to the bottom of the cabinet body, a ventilation plate is connected to the top of the fixing frame, a groove is opened at the top of the fixing frame, a charging port is arranged in the middle of the groove, a bearing plate is provided on the upper side of the groove, an opening is opened on the bearing plate, a positioning clamping component connected to the bearing plate is provided on the fixing frame, and a symmetrically distributed limiting component is provided on the top of the bearing plate.

[0005] The top of described sliding panel also is provided with an interlocking structure, and the interlocking structure is hinged on the base plate, is fixed with a backing pin on the interlocking structure, and the interlocking structure is hinged on the base plate, is fixed with a backing pin on the interlocking structure, and the interlocking structure is hinged on the base plate, and the interlocking structure is hinged on the base plate, and the interlocking structure is hinged on the base plate

[0006] More preferably, the limit assembly includes a connecting block fixedly connected to the top of the supporting plate, the limit assembly includes a connecting block fixedly connected to the top of the supporting plate, the connecting block is slidably connected to a limit frame via a guide rod, and a spring is fixedly connected between the limit frame and the connecting block.

[0007] More preferably, the limiting frame is made of rubber material, and an upper portion of a side surface of the limiting frame facing the opening is arranged as an inclined surface.

[0008] More preferably, a storage shell for containing nitrogen is bonded to the top of the cavity, sliding rods are fixedly connected to the top of the cavity on both sides of the storage shell, a needle tip is fixedly connected between the bottom ends of the sliding rods on both sides through a support plate, a sliding plate is slidably connected between the sliding rods on both sides, a circular hole is opened in the middle of the sliding plate, the circular hole is located directly above the needle tip, the sliding plate is located on the lower side of the storage shell and the two are in contact and fit, a connecting plate is fixedly connected to the side wall of the sliding plate, a symmetrically distributed first rack is fixedly connected to the bottom of the connecting plate, and a shielding component for closing the ventilation holes and the ventilation slots is provided on the mounting plate.

[0009] More preferably, the bottom of the storage shell is made of a deformable elastic material.

[0010] More preferably, the shielding assembly includes symmetrically distributed transmission gears, the symmetrically distributed transmission gears are rotatably connected to the other side wall of the mounting plate, a second rack is provided on the lower side of the transmission gear, the transmission gear is respectively meshed with the first rack and the second rack, and the first rack and the second rack are staggered, a fixing rod is fixedly connected to the bottom of the second rack, a baffle is fixedly connected to the lower end of the fixing rod, a receiving groove is provided on the mounting plate, the receiving groove is connected to the ventilation hole, and the baffle is slidably connected to the receiving groove, a symmetrically distributed cylindrical groove is provided in the mounting plate, a shield is slidably connected to the lower side of the receiving groove, the shield is slidably connected to the cabinet, the bottom end of the shield is located in the ventilation groove, a second spring is fixedly connected between the shield and the cylindrical groove, and an extrusion rod is fixedly connected to the bottom of the baffle.

[0011] More preferably, the contact surface between the sliding plate and the sliding rod is a rough surface to form movement resistance, and the friction resistance between the sliding plate and the sliding rod is greater than the elastic force of the second spring.

[0012] More preferably, the lower portion of the shield is rectangular and the upper portion is trapezoidal, the lower end of the extrusion rod is rotatably connected to a contact ball, and the contact ball is in contact and fit with the inclined surface of the shield.

[0013] More preferably, a connecting frame is fixedly connected to the side wall of the cabinet outside the ventilation slot, a filter plate is fixedly connected to the connecting frame, a support plate is fixedly connected to the connecting frame, a moving rod is slidably connected to the support plate, a knocking ball is fixedly connected to the end of the moving rod close to the filter plate, a spring is fixedly connected between the moving rod and the support plate, and symmetrically distributed squeezing balls are fixedly connected to the side wall of the baffle.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] The present invention can extract the air in the cabinet through the ventilation holes on the mounting plate through the exhaust fan, and the outside air enters the cabinet through the ventilation slots and blows toward the tablet computer along the inclination thereof, so as to cool down the tablet computer being charged; when the temperature in the cabinet rises, the nitrogen in the storage shell gradually expands and pushes the sliding plate, the connecting plate and the first rack downward to drive the transmission gear to rotate, and the rotation of the transmission gear drives the second rack, the fixing rod and the baffle to move and gradually block the ventilation holes of the mounting plate, and the movement of the baffle pushes the baffle to gradually move downward to block the ventilation slots through the extrusion rod, and a closed space is formed by the cabinet, the cabinet door, the mounting plate and the baffle to isolate the oxygen in the outside air from entering, and the bottom of the storage shell breaks after contacting with the needle tip, and the nitrogen in the storage shell enters the closed space to dilute the oxygen content in the air (and the temperature of the nitrogen is relatively low, so it can quickly cool down the air in the space while diluting it), so as to reduce the oxygen content in the air, thereby eliminating the source of fire and preventing the tablet computer from generating excessive heat during the charging process and causing a fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0017] Figure 2 It is a rear-view stereoscopic structural schematic diagram of the present invention.

[0018] Figure 3 It is a side view and a cross-sectional three-dimensional structure schematic diagram of the cabinet of the present invention.

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the positioning and clamping assembly of the present invention.

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the limiting component of the present invention.

[0021] Figure 6 It is a schematic diagram of the three-dimensional structure of the storage shell of the present invention.

[0022] Figure 7 It is a schematic diagram of the three-dimensional structure of the limiting frame of the present invention.

[0023] Figure 8 It is a schematic diagram of the cross-sectional three-dimensional structure of the mounting plate of the present invention.

[0024] Fig. 9 It is a schematic diagram of the three-dimensional structure of the shielding plate of the present invention.

[0025] Fig.10 It is a schematic diagram of the three-dimensional structure of the filter plate of the present invention.

[0026] The markings of the components in the accompanying drawings are as follows: 1. cabinet, 101. cavity, 2. cabinet door, 3. handle, 4. pressure relief valve, 5. mounting plate, 501. ventilation hole, 6. housing, 7. exhaust fan, 8. ventilation slot, 9. fixing frame, 10. ventilation plate, 11. groove, 12. charging port, 13. bearing plate, 14. opening, 15. connecting rod, 16. first spring, 17. positioning block, 18. fixing block, 19. clamping plate, 20. wedge plate, 21. connecting frame, 22. extrusion plate, 2 3. connecting block, 24. limiting frame, 25. guide rod, 26. storage shell, 27. sliding rod, 28. needle tip, 29. sliding plate, 30. connecting plate, 31. first rack, 32. transmission gear, 33. second rack, 34. fixing rod, 35. baffle, 36. containing groove, 37. cylindrical groove, 38. shield, 39. second spring, 40. extrusion rod, 41. extrusion ball, 42. connecting frame, 43. filter plate, 44. support plate, 45. moving rod, 46. knocking ball. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Example 1

[0029] A multi-station charging cabinet for security, such as Figure 1-Figure 7As shown, it includes a cabinet body 1, and eight cavities 101 are provided on the cabinet body 1. The front side of the cavity 101 is rotatably connected to a cabinet door 2, and the front side wall of the cabinet door 2 is connected to a handle 3. A pressure relief valve 4 is embedded in the cabinet door 2. A mounting plate 5 is fixedly connected to the rear side of the cavity 101. The mounting plate 5 and the cabinet door 2 are symmetrically arranged. A ventilation hole 501 that penetrates front and back is opened at the lower part of the mounting plate 5. A shell 6 is fixedly connected to the rear side wall of the mounting plate 5, and the inner diameter of the shell 6 coincides with the outer diameter of the ventilation hole 501 on the mounting plate 5. An exhaust fan 7 is installed in the shell 6. A ventilation slot 8 connected to the cavity 101 is opened on the cabinet body 1 at the lower side of the cavity 101, and the rear side of the ventilation slot 8 is a water A flat groove, and its front side is an inclined groove inclined backward and upward, a fixed frame 9 is fixedly connected to the front side of the bottom of the cavity 101, a ventilation plate 10 is connected to the top rear side of the fixed frame 9, the inclined groove of the ventilation groove 8 faces the ventilation plate 10, a groove 11 is provided on the top of the fixed frame 9, and the groove 11 is located on the front side of the ventilation plate 10, a charging port 12 is provided in the middle of the groove 11, a supporting plate 13 is provided on the upper side of the groove 11, an opening 14 is provided in the middle of the supporting plate 13 and is sleeved on the outside of the charging port 12, a positioning and clamping assembly connected to the supporting plate 13 is provided on the fixed frame 9, and a symmetrically distributed limit assembly is provided on the top of the supporting plate 13.

[0030] The positioning clamping assembly includes two connecting rods 15 symmetrically distributed on the left and right sides. The left and right connecting rods 15 are slidably connected to the upper part of the fixed frame 9. A first spring 16 is fixedly connected between the connecting rod 15 and the fixed frame 9. One end of the connecting rod 15 is fixedly connected to the bottom of the bearing plate 13. The other end of the connecting rod 15 is fixedly connected to a positioning block 17, and the positioning block 17 is slidably connected to the fixed frame 9. The left and right sides of the front side wall of the ventilation plate 10 are fixedly connected to fixed blocks 18. The side walls of the fixed block 18 are connected to a clamping plate 19 through a spring. The bottom of the clamping plate 19 is matched with the top sliding limit of the fixed frame 9. A positioning groove is provided at the bottom of the clamping plate 19. The positioning block 17 is slidably located in the positioning groove of the clamping plate 19. A wedge plate 20 is fixedly connected to the front side wall of the clamping plate 19. A connecting frame 21 is slidably connected to the fixed frame 9. One end of the connecting frame 21 is fixedly connected to the bottom of the bearing plate 13, and the other end of the connecting frame 21 is fixedly connected to an extrusion plate 22 located on the upper side of the wedge plate 20.

[0031] The limiting assembly includes a connecting block 23 fixedly connected to the top of the supporting plate 13, and a limiting frame 24 is slidably connected to the connecting block 23 via a guide rod 25. A spring is fixedly connected between the limiting frame 24 and the connecting block 23. The limiting frame 24 is made of rubber material, and the upper side of the limiting frame 24 facing the opening 14 is set as an inclined surface.

[0032] During use, the user opens the cabinet door 2, and then the user moves the tablet computer that needs to be charged to the upper side of the supporting plate 13, and places the tablet computer vertically on the supporting plate 13, and makes the charging position of the tablet computer be located at the lower side. In the process of placing the tablet computer on the supporting plate 13, the lower part of the tablet computer will squeeze the limiting frames 24 on the front and rear sides, so that the springs between the limiting frames 24 and the connecting blocks 23 are compressed. Through the springs on the limiting frames 24, the limiting frames 24 can be closely contacted with the surface of the tablet computer to realize the vertical limitation of the tablet computer. After the tablet computer is placed on the supporting plate 13, the supporting plate 13 moves downward under the weight of the tablet computer thereon. The supporting plate 13 moves downward through the connecting rod 15 to make the blocking block 17 away from the blocking groove of the clamping plate 19, thereby releasing the limiting fixation of the clamping plate 19, and the first spring 16 is stretched accordingly. During the downward movement of the plate 13, the squeezing plate 22 is driven by the connecting frame 21 to push the wedge plate 20, so that the wedge plate 20 drives the clamping plate 19 to move closer to the side wall of the tablet computer. After the clamping plate 19 moves and contacts the side wall of the tablet computer, the side wall of the tablet computer can be fixed. For this reason, the above operation can achieve the limited fixation of the tablet computer, and the charging point of the tablet computer can be matched with the charging port 12 during the downward movement of the supporting plate 13, so as to realize charging of the tablet computer. After the tablet computer is placed, the user resets the cabinet door 2 and starts the exhaust fan 7. The exhaust fan 7 can draw the air in the cabinet 1 and discharge it outward through the ventilation holes 501 on the mounting plate 5, while the outside air enters the cabinet 1 through the ventilation slots 8 and blows toward the tablet computer along its inclination, so as to realize the cooling of the tablet computer being charged.

[0033] Example 2

[0034] On the basis of Example 1, Figure 2 , 3 As shown in 7-10, a storage shell 26 for containing nitrogen is bonded to the top of the cavity 101, and the bottom of the storage shell 26 is a deformable elastic material. The storage shell 26 is located directly above the fixed frame 9. Sliding rods 27 are fixedly connected to the top of the cavity 101 on the left and right sides of the storage shell 26. A needle tip 28 is fixedly connected between the bottom ends of the left and right sliding rods 27 through a support plate. The needle tip 28 is located directly below the deformable elastic material at the bottom of the storage shell 26. A sliding plate 29 is slidably connected between the left and right sliding rods 27, and a circular hole is opened in the middle of the sliding plate 29, and the circular hole on the sliding plate 29 is located directly above the needle tip 28. The sliding plate 29 is located on the lower side of the storage shell 26 and the two are in contact and cooperate. A connecting plate 30 is fixedly connected to the rear side wall of the sliding plate 29, and two first racks 31 symmetrically distributed on the left and right are fixedly connected to the bottom of the connecting plate 30. A shielding component for closing the ventilation hole 501 and the ventilation slot 8 is provided on the mounting plate 5.

[0035] The shielding assembly includes two transmission gears 32 that are symmetrically distributed on the left and right sides. The two transmission gears 32 are rotatably connected to the front side wall of the mounting plate 5. A second rack 33 is provided on the lower side of the transmission gear 32. The transmission gear 32 is meshed with the first rack 31 and the second rack 33 respectively, and the first rack 31 and the second rack 33 are staggered in front and back. A fixing rod 34 is fixedly connected to the bottom of the second rack 33, and a baffle 35 is fixedly connected to the lower end of the fixing rod 34. A receiving groove 36 is provided on the mounting plate 5. The receiving groove 36 is communicated with the ventilation hole 501, and the baffle 35 is slidably connected to the receiving groove 36. Two symmetrically distributed transmission gears 32 are provided in the mounting plate 5. The cylindrical groove 37 of the cloth, the lower side of the containing groove 36 is slidably connected with a baffle 38, and the baffle 38 is slidably connected to the cabinet 1, the bottom end of the baffle 38 is located in the ventilation groove 8, the lower part of the baffle 38 is rectangular, and the upper part is trapezoidal, a second spring 39 is fixedly connected between the baffle 38 and the cylindrical groove 37, the contact surface between the sliding plate 29 and the sliding rod 27 is a rough surface to form a moving resistance, and the friction resistance between the sliding plate 29 and the sliding rod 27 is greater than the elastic force of the second spring 39, the bottom of the baffle 35 is fixedly connected with an extrusion rod 40, the lower end of the extrusion rod 40 is rotatably connected with a contact ball, and the contact ball contacts and cooperates with the inclined surface of the baffle 38.

[0036] A connecting frame 42 is fixedly connected to the cabinet 1 on the rear side of the ventilation slot 8, and the connecting frame 42 is located on the outside of the ventilation slot 8, a filter plate 43 is fixedly connected in the connecting frame 42, a support plate 44 is fixedly connected in the connecting frame 42, a moving rod 45 is slidably connected to the support plate 44, a knocking ball 46 is fixedly connected to the rear end of the moving rod 45, a spring is fixedly connected between the moving rod 45 and the support plate 44, and two squeezing balls 41 symmetrically distributed up and down are fixedly connected to the rear side wall of the baffle 38.

[0037] When the temperature in the cabinet 1 rises, the temperature rise in the cabinet 1 can be transmitted to the nitrogen in the storage shell 26. When the temperature rises, the pressure of the nitrogen will gradually increase, and the pressure increase in the nitrogen will cause the deformable elastic material at the bottom of the storage shell 26 to expand downward. The deformable elastic material at the bottom of the storage shell 26 expands downward and pushes the sliding plate 29 to move downward on the sliding rod 27. The sliding plate 29 moves downward and drives the first rack 31 to move downward through the connecting plate 30, driving the transmission gear 32 to rotate. The rotation of the transmission gear 32 drives the second rack 33 to move through the fixing rod 34 to gradually block the ventilation hole 501 of the mounting plate 5. The baffle 35 moves and pushes the blocking hole 501 through the extrusion rod 40 thereon. The plate 38 gradually moves downward to block the ventilation slot 8. After the shielding plate 38 moves downward to block the ventilation slot 8, the cavity 101 cooperates with the adjacent cabinet door 2, the mounting plate 5, and the baffle 35 to form a closed space, thereby isolating the oxygen in the outside air from entering. At the same time, the bottom of the storage shell 26 ruptures after contacting the needle tip 28, and the nitrogen in the storage shell 26 enters the closed space to dilute the oxygen content in the air in the space (and the temperature of nitrogen is relatively low, so it can quickly cool down the air in the space while diluting it), thereby reducing the oxygen content in the air, thereby eliminating the source of fire and preventing the tablet computer from generating excessive heat during charging and causing flames to cause fires.

[0038] When the nitrogen in the storage shell 26 in the cavity 101 is released, there is a large amount of nitrogen in the cavity 101 at this time. When the user directly opens the cabinet door 2, it is easy to cause the nitrogen to flow out. At this time, the user will feel uncomfortable when inhaling the nitrogen. To avoid the above situation, the user discharges the gas in the cavity 101 through the pressure relief valve 4. This method reduces the area of ​​nitrogen discharge, so that it can be quickly diluted under the action of external air. Therefore, it can be avoided to directly open the cabinet door 2, which causes the nitrogen in the cavity 101 to be directly discharged over a large area. The user stands in front of the cavity 101, which causes the inhalation of part of the nitrogen to affect the body. Then, the cabinet door 2 is opened to remove and replace the storage shell 26, and then the sliding plate 29 is manually moved upward to reset. At this time, the baffle 35 and the shutter 38 are moved and reset.

[0039] During the downward movement of the shield 38, the squeezing ball 41 thereon squeezes the moving rod 45 to move, and the movement of the moving rod 45 drives the knocking ball 46 to collide with the filter plate 43, so that the filtered debris on it falls downward, avoiding the debris in the air from entering the cabinet 1 due to the air entering the cavity not being filtered (the user can also periodically clean the debris on the filter plate 43).

[0040] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-station charging cabinet for security, comprising a cabinet body (1), a cavity (101) provided on the cabinet body (1), a cabinet door (2) rotatably connected to one side of the cavity (101), a handle (3) connected to the side wall of the cabinet door (2), a pressure relief valve (4) embedded in the cabinet door (2), a mounting plate (5) fixedly connected to the other side of the cavity (101), the mounting plate (5) and the cabinet door (2) being symmetrically arranged, wherein: A ventilation hole (501) is provided at the lower part of the mounting plate (5), a shell (6) is fixedly connected to the side wall of the mounting plate (5) outside the ventilation hole (501), an exhaust fan (7) is installed in the shell (6), a ventilation slot (8) is provided on the cabinet (1), and the ventilation slot (8) is located at the lower side of the cabinet door (2) and the mounting plate (5), a fixing frame (9) is fixedly connected to the bottom of the cabinet (1), a ventilation plate (10) is connected to the top of the fixing frame (9), a groove (11) is provided at the top of the fixing frame (9), a charging port (12) is provided in the middle of the groove (11), a bearing plate (13) is provided on the upper side of the groove (11), an opening (14) is provided on the bearing plate (13), a positioning clamping component connected to the bearing plate (13) is provided on the fixing frame (9), and a symmetrically distributed limiting component is provided on the top of the bearing plate (13).

2. A multi-station charging cabinet for security according to claim 1, characterized in that: The positioning clamping assembly comprises symmetrically distributed connecting rods (15), the symmetrically distributed connecting rods (15) are slidably connected to the upper part of the fixed frame (9), a first spring (16) is fixedly connected between the connecting rod (15) and the fixed frame (9), one end of the connecting rod (15) is fixedly connected to the bottom of the bearing plate (13), the other end of the connecting rod (15) is fixedly connected to a positioning block (17), the positioning block (17) is slidably connected to the fixed frame (9), the side wall of the ventilation plate (10) is fixedly connected to a symmetrically distributed fixing block (18), the fixing block (18) is fixedly connected to the side wall of the ventilation plate (10), and the fixing block (18) is fixedly connected to the fixing frame (9). The side wall is connected to a clamping plate (19) through a spring, the bottom of the clamping plate (19) is slidably limited with the top of the fixed frame (9), a locking groove is provided at the bottom of the clamping plate (19), the locking block (17) is slidably located in the locking groove, the side wall of the clamping plate (19) is fixedly connected to a wedge plate (20), the fixed frame (9) is slidably connected to a connecting frame (21), one end of the connecting frame (21) is fixedly connected to the bottom of the bearing plate (13), and the other end of the connecting frame (21) is fixedly connected to an extrusion plate (22) located on the upper side of the wedge plate (20).

3. A multi-station charging cabinet for security according to claim 2, characterized in that: The limiting assembly comprises a connecting block (23) fixedly connected to the top of the supporting plate (13); the connecting block (23) is slidably connected to a limiting frame (24) via a guide rod (25); and a spring is fixedly connected between the limiting frame (24) and the connecting block (23).

4. A multi-station charging cabinet for security according to claim 3, characterized in that: The limiting frame (24) is made of rubber material, and an upper portion of a side surface of the limiting frame (24) facing the opening (14) is arranged as an inclined surface.

5. A multi-station charging cabinet for security use according to claim 3, characterized in that: A storage shell (26) for containing nitrogen is bonded to the top of the cavity (101), sliding rods (27) are fixedly connected to the top of the cavity (101) on both sides of the storage shell (26), a needle tip (28) is fixedly connected between the bottom ends of the sliding rods (27) on both sides through a support plate, a sliding plate (29) is slidably connected between the sliding rods (27) on both sides, a circular hole is opened in the middle of the sliding plate (29), and the circular hole is located just above the needle tip (28), the sliding plate (29) is located on the lower side of the storage shell (26) and the two are in contact and fit, a connecting plate (30) is fixedly connected to the side wall of the sliding plate (29), and a symmetrically distributed first rack (31) is fixedly connected to the bottom of the connecting plate (30), and a shielding component for closing the ventilation hole (501) and the ventilation slot (8) is provided on the mounting plate (5).

6. A multi-station charging cabinet for security according to claim 5, characterized in that: The bottom of the storage shell (26) is made of a deformable elastic material.

7. A multi-station charging cabinet for security according to claim 5, characterized in that: The shielding assembly comprises symmetrically distributed transmission gears (32), the symmetrically distributed transmission gears (32) are rotatably connected to the other side wall of the mounting plate (5), a second rack (33) is provided on the lower side of the transmission gear (32), the transmission gear (32) is respectively meshed with the first rack (31) and the second rack (33), and the first rack (31) and the second rack (33) are staggered, a fixing rod (34) is fixedly connected to the bottom of the second rack (33), a baffle (35) is fixedly connected to the lower end of the fixing rod (34), and a retaining plate (35) is provided on the mounting plate (5). The receiving groove (36) is connected to the ventilation hole (501), and the baffle (35) is slidably connected to the receiving groove (36). The mounting plate (5) is provided with symmetrically distributed cylindrical grooves (37). The lower side of the receiving groove (36) is slidably connected with a baffle (38). The baffle (38) is slidably connected to the cabinet body (1). The bottom end of the baffle (38) is located in the ventilation groove (8). A second spring (39) is fixedly connected between the baffle (38) and the cylindrical groove (37). The bottom of the baffle (35) is fixedly connected with an extrusion rod (40).

8. A multi-station charging cabinet for security according to claim 7, characterized in that: The contact surface between the sliding plate (29) and the sliding rod (27) is a rough surface to form movement resistance, and the friction resistance between the sliding plate (29) and the sliding rod (27) is greater than the elastic force of the second spring (39).

9. A multi-station charging cabinet for security use according to claim 8, characterized in that: The lower part of the shield (38) is rectangular, and the upper part is trapezoidal. The lower end of the extrusion rod (40) is rotatably connected to a contact ball, and the contact ball is in contact with the inclined surface of the shield (38).

10. A multi-station charging cabinet for security use according to claim 8, characterized in that: A connecting frame (42) is fixedly connected to the side wall of the cabinet (1) outside the ventilation slot (8), a filter plate (43) is fixedly connected inside the connecting frame (42), a support plate (44) is fixedly connected inside the connecting frame (42), a moving rod (45) is slidably connected to the support plate (44), a knocking ball (46) is fixedly connected to one end of the moving rod (45) close to the filter plate (43), a spring is fixedly connected between the moving rod (45) and the support plate (44), and symmetrically distributed squeezing balls (41) are fixedly connected to the side wall of the shielding plate (38).

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