Underground intelligent personnel limiting door

Abstract

The underground intelligent personnel limiting door comprises a protective cover, a base is arranged at the bottom of the protective cover, barrier gate main machines are arranged on the two sides of the top of the base respectively, mining pneumatic boxes are installed in the barrier gate main machines, and rotating rods are rotationally connected to the sides, close to each other, of the barrier gate main machines; the rotating rods are in transmission connection with the mining pneumatic box, personnel limiting gates are arranged on the sides, close to each other, of the rotating rods, and anti-pinch infrared sensors are arranged on the sides, close to each other, of the barrier gate main machines at equal intervals. The utility model relates to the technical field of mining equipment, and solves the technical problems that in the prior art, a manual warning personnel limiting device is generally adopted in a coal mine, great inconvenience exists in use, a specially-assigned person needs to be arranged for guarding, manpower and material resources are wasted, the number of underground operators cannot be strictly controlled, the number of underground operators cannot be counted in real time, and the working efficiency is high. And safety management of coal mine enterprises is not facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of mining equipment, in particular to an underground intelligent limited-passenger door. Background Art

[0002] In the daily management of coal mine production safety, the management of personnel access to underground working areas is crucial. Traditional access control systems for underground coal mines mostly use mechanical locks or simple electronic locks, which cannot achieve intelligent access control and safety warnings. When the number of underground workers exceeds the safety limit, the traditional access control system cannot respond in time, increasing the risk of safety accidents. In the prior art, manual warning limit devices are generally used in underground coal mines, which are very inconvenient to use. At the same time, special personnel need to be arranged to guard, which wastes manpower and material resources. It is impossible to strictly control the number of underground workers, and it is impossible to count the number of underground workers in real time, which is not conducive to the safety management of coal mine enterprises. Summary of the invention

[0003] In view of the deficiencies in the prior art, the utility model provides an underground intelligent limited-occupancy door, which solves the problem that in the prior art, manual warning and limiting devices are generally used in coal mines, which is very inconvenient to use and requires special personnel to guard, wasting manpower and material resources, and cannot achieve strict control over the number of underground workers. The number of underground workers cannot be counted in real time, which is not conducive to the safety management of coal mining enterprises.

[0004] To achieve the above-mentioned purpose, the utility model is implemented through the following technical solutions: an underground intelligent limited-personnel door, including a protective cover, a base is provided at the bottom of the protective cover, and gate hosts are provided on both sides of the top of the base, a mining pneumatic box is installed inside the gate host, a rotating rod is rotatably connected to the side where the gate hosts are close to each other, and the rotating rod is transmission-connected to the mining pneumatic box, a limited-personnel gate is provided on the side where the rotating rods are close to each other, and anti-pinch infrared sensors are equidistantly provided on the side where the gate hosts are close to each other, mining pyroelectric infrared sensors are installed on the front and back of the top of the protective cover, an audible and visual alarm is installed on one side of the inner wall of the protective cover, an underground intrinsic safety screen is installed on one side of the inner wall of the protective cover, and a PLC controller is provided on one side of the inner wall of the protective cover, and the PLC controller is electrically connected to the mining pneumatic box, the mining pyroelectric infrared sensor, the audible and visual alarm, the PLC controller and the anti-pinch infrared sensor respectively.

[0005] Preferably, the interior of the barrier gate host is fixedly connected to a limit rail, the inner wall of the limit rail is cooperatively connected to a rack, the rack is fixedly connected to the output end of the mining pneumatic box, the outer wall of the rotating rod is fixedly connected to a gear, the gear is meshingly connected to the rack, the interior of the barrier gate host is fixedly connected to a side away from the mining pneumatic box with a displacement sensor, the displacement sensor is electrically connected to the PLC controller, and the sensing end of the displacement sensor is fixedly connected to the rack.

[0006] Preferably, connecting rods are fixedly connected to the upper and lower sides of the rotating rods where they are close to each other, the connecting rods are socketed with the limited-personnel gate, fixing holes are equidistantly provided on the side of the limited-personnel gate close to the connecting rods, fixing bolts are equidistantly provided on the outer wall of the connecting rods, and the fixing bolts are threadedly connected to the fixing holes.

[0007] Preferably, magnetic card recognition modules are provided on both sides of the barrier gate host, a camera is provided on the barrier gate host above the magnetic card recognition module, and passage indicator lights are provided on both sides of the limited-capacity gate, and the passage indicator lights, magnetic card recognition module and camera are all electrically connected to the PLC controller.

[0008] Preferably, an evacuation alarm light is installed on the top of the gate host, and the evacuation alarm light is electrically connected to the PLC controller.

[0009] The utility model provides an underground intelligent limited-personnel door. It has the following beneficial effects: the underground intelligent limited-personnel door, through the cooperation between the protective cover, the base, the gate host, the mining pneumatic box, the rotating rod, the limited-personnel gate, the mining pyro-infrared sensor, the sound and light alarm, the PLC controller and the underground intrinsic safety screen, senses the operators at both ends of the limited-personnel door through the mining pyro-infrared sensor, uses the PLC controller to control the automatic opening and closing of the limited-personnel door, and performs real-time statistics on the number of operators in the mine. When the number of operators reaches the required number, corresponding measures are taken, and there is no need to use a manual warning limited-personnel device or arrange special personnel for guarding. It can intelligently control the entry and exit of underground personnel, and strictly control the number of underground operators to avoid the number of operators exceeding the safety limit value, reduce the risk of safety accidents, and thus facilitate coal mine enterprises to better manage safety.

[0010] Through the coordination among the gate host, mining pneumatic box, rotating rod, limited-personnel gate, PLC controller, limit rail, rack, gear and displacement sensor, the mining pneumatic box drives the rack to move, and utilizes the meshing between the rack and the gear to rotate the gear, thereby controlling the opening or closing of the limited-personnel gate. Compared with the traditional cylinder or motor drive method, the mining pneumatic box has higher stability and safety in the mine environment, and the driving structure of the limited-personnel gate is simplified, which can make the opening and closing of the limited-personnel gate more stable, thereby improving the use stability and service life of the limited-personnel gate equipment in the underground environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 This is a top view of the structure of the gate host, mining pneumatic box and rack;

[0013] Figure 3 for Figure 1 A partial enlarged view of the middle A area;

[0014] Figure 4 for Figure 2 A partial enlarged view of area B in the middle.

[0015] In the figure: 1. Protective cover, 2. Base, 3. Gate host, 4. Mining pneumatic box, 5. Rotating rod, 6. Limited-capacity gate, 7. Mining pyroelectric infrared sensor, 8. Sound and light alarm, 9. PLC controller, 10. Underground intrinsically safe screen, 11. Anti-pinch infrared sensor, 12. Connecting rod, 13. Fixing hole, 14. Fixing bolt, 15. Pass indicator light, 16. Limit rail, 17. Rack, 18. Gear, 19. Displacement sensor, 20. Magnetic card recognition module, 21. Camera, 22. Evacuation alarm light. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] In the prior art, manual warning and limiting devices are generally used in coal mines, which are very inconvenient to use and require special personnel to guard, wasting manpower and material resources. It is impossible to strictly control the number of people working underground, and it is impossible to count the number of people working underground in real time, which is not conducive to the safety management of coal mine enterprises.

[0018] In view of this, the utility model provides an underground intelligent limited-capacity door. Through the cooperation among the protective cover, the base, the gate host, the mining pneumatic box, the rotating rod, the limited-capacity gate, the mining pyroelectric infrared sensor, the sound and light alarm, the PLC controller and the underground intrinsic safety screen, the operating personnel are sensed at both ends of the limited-capacity door through the mining pyroelectric infrared sensor, the limited-capacity door is automatically opened and closed by the PLC controller, and the number of workers underground is counted in real time. When the number of workers required is met, corresponding measures are taken without the need to use manual warning limited-capacity devices or arrange special personnel for guarding, so as to realize intelligent control of the entry and exit of underground personnel, and strictly control the number of underground workers, so as to facilitate coal mine enterprises to better manage safety.

[0019] Through the personnel in this field, all the electrical components in this case are connected to their corresponding power supplies through wires, and appropriate controllers and encoders should be selected according to actual conditions to meet the control requirements. The specific connection and control sequence should refer to the following working principle, and the electrical connection between the electrical components is completed in the order of working in sequence. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principles and processes, and no longer explains the electrical control.

[0020] Depend on Figure 1-4It can be seen that an underground intelligent limited-personnel door includes a protective cover 1, which is used to provide protection for the limited-personnel door equipment and personnel, and improve the safety of the equipment and personnel. A base 2 is arranged at the bottom of the protective cover 1, and the base 2 is used to support and fix the limited-personnel door equipment and cover and protect the power transmission line. Gate hosts 3 are arranged on both sides of the top of the base 2, and a mining pneumatic box 4 is installed inside the gate host 3. The side of the gate host 3 that is close to each other is rotatably connected with a rotating rod 5, and the rotating rod 5 is transmission-connected to the mining pneumatic box 4. A limited-personnel gate 6 is arranged on the side where the rotating rod 5 is close to each other, and anti-pinch infrared sensors 11 are equidistantly arranged on the side where the gate hosts 3 are close to each other. The anti-pinch infrared sensor 11 is used to sense the passage of people between the gate hosts 3. Mine pyrolytic infrared sensors 7 are installed on the front and back of the top of the protective cover 1. 7 is an explosion-proof infrared sensor used in a mine environment. Based on the principle of pyroelectric effect, it is used to detect and sense changes in infrared radiation at both ends of a restricted door and convert it into an electrical signal output. An audible and visual alarm 8 is installed on one side of the inner wall of the protective cover 1. The audible and visual alarm 8 is used to emit sound and light alarm signals. According to the signal transmitted by the PLC controller 9, the information of restricted personnel is reminded. An underground intrinsic safety screen 10 is installed on one side of the inner wall of the protective cover 1. A PLC controller 9 is provided on one side of the inner wall of the protective cover 1. The PLC controller 9 is used to collect signals and issue control commands. At the same time, it is connected to the mine monitoring network to transmit the information of the number of people working underground in real time, which is convenient for enterprises to conduct remote monitoring. The PLC controller 9 is electrically connected to the mining pneumatic box 4, the mining pyroelectric infrared sensor 7, the audible and visual alarm 8, the PLC controller 9 and the anti-pinch infrared sensor 11 respectively;

[0021] In the specific implementation process, it is worth pointing out that the protective cover 1 is used to provide protection for the limited-personnel door equipment and personnel, improve the safety of the equipment and personnel, the base 2 is used to support and fix the limited-personnel door equipment, and cover and protect the power transmission line. Through the cooperation between the gate host 3, the mining pneumatic box 4, the rotating rod 5 and the limited-personnel gate 6, the mining pneumatic box 4 drives the rotating rod 5 to rotate, so as to realize the opening and closing of the limited-personnel gate 6. Compared with the traditional cylinder or motor driving method, the mining pneumatic box 4 is more stable and safe when used in the mine, which improves the service life of the limited-personnel door equipment. The anti-pinch infrared sensor 11 is used to sense the passage of personnel between the gate host 3, and the mining thermal The infrared sensor 7 is an explosion-proof infrared sensor used in the mine environment. It is based on the principle of pyroelectric effect and is used to detect and sense the changes in infrared radiation at both ends of the limited-personnel door, and convert it into electrical signals and output it to the PLC controller 9. The PLC controller 9 is used to collect signals and issue control commands. At the same time, it is connected to the mine monitoring network to transmit the information of the number of people working underground in real time, which is convenient for enterprises to conduct remote monitoring. Through the cooperation between the protective cover 1, the base 2, the gate host 3, the mining pneumatic box 4, the rotating rod 5, the limited-personnel gate 6, the mining pyroelectric infrared sensor 7 and the PLC controller 9, when the staff moves to the two ends of the limited-personnel door, the mining pyroelectric infrared sensor 7 senses the changes in infrared radiation at both ends of the limited-personnel door. The sensing signal is transmitted to the PLC controller 9 in real time. The PLC controller 9 controls the mining pneumatic box 4 to drive the limited-personnel gate 6 to open automatically, and automatically close after the personnel pass through, so as to realize the automatic opening and closing of the limited-personnel gate. The PLC controller 9 counts the number of personnel entering and exiting, and controls the number of people working underground. The sound and light alarm 8 is used to emit sound and light alarm signals. According to the signal transmitted by the PLC controller 9, the information of the restricted personnel is reminded. The underground intrinsic safety screen 10 is used to display the number of existing working personnel underground and the number of remaining people who can enter, so that the staff can grasp the number of working personnel underground in real time. Through the gate host 3, the mining pneumatic box 4, the rotating rod 5, the limit The cooperation between the personnel gate 6, the mining pyro-infrared sensor 7, the sound and light alarm 8, the PLC controller 9 and the underground intrinsic safety screen 10, the mining pyro-infrared sensor 7 senses the operating personnel at both ends of the limited-personnel gate, so that the PLC controller 9 can automatically open and close the limited-personnel gate 6, and count the number of people passing through the limited-personnel gate according to the PLC controller 9. After the number of people reaches the operating number requirement, the PLC controller 9 stops opening the limited-personnel gate 6, stops the entry of people, and sends out sound and light reminders through the sound and light alarm 8. At this time, the limited-personnel gate can only exit but not enter, until the number of people is less than the operating number requirement, thereby realizing automatic control of the limited-personnel gate 6 and strict control of the number of people working underground.Through the cooperation among the protective cover 1, the base 2, the gate host 3, the mining pneumatic box 4, the rotating rod 5, the limited-personnel gate 6, the mining pyro-infrared sensor 7, the sound and light alarm 8, the PLC controller 9 and the underground intrinsic safety screen 10, the mining pyro-infrared sensor 7 is used to sense the operating personnel at both ends of the limited-personnel gate, and the PLC controller 9 is used to control the automatic opening and closing of the limited-personnel gate, and the number of operating personnel in the mine is counted in real time. After the number of operating personnel is met, corresponding measures are taken, and there is no need to use a manual warning limited-personnel device or arrange special personnel for guarding, so as to realize the intelligent control of the entry and exit of underground personnel, and strictly control the number of underground workers, so as to facilitate coal mine enterprises to better manage safety. The specific models of the mining pneumatic box 4, the mining pyro-infrared sensor 7, the sound and light alarm 8, the PLC controller 9 and the underground intrinsic safety screen 10 are not limited, and they can meet the use requirements;

[0022] Further, the interior of the barrier mainframe 3 is fixedly connected with a limit rail 16, the inner wall of the limit rail 16 is matched with a rack 17, the rack 17 is fixedly connected to the output end of the mining pneumatic box 4, the outer wall of the rotating rod 5 is fixedly connected with a gear 18, the gear 18 is meshed with the rack 17, the interior of the barrier mainframe 3 is fixedly connected with a displacement sensor 19 on the side away from the mining pneumatic box 4, the displacement sensor 19 is electrically connected to the PLC controller 9, and the sensing end of the displacement sensor 19 is fixedly connected to the rack 17;

[0023] In the specific implementation process, it is worth pointing out that, through the cooperation between the gate host 3, the mining pneumatic box 4, the limit rail 16 and the rack 17, the mining pneumatic box 4 is controlled to make the telescopic rod of the mining pneumatic box 4 telescopically move, thereby driving the rack 17 to move inside the limit rail 16, and the displacement sensor 19 is used to sense the moving position of the rack 17, and transmit the sensing signal to the PLC controller 9 in real time, so that the PLC controller 9 can control the mining pneumatic box 4, through the gate host 3, the mining pneumatic box 4, the rotating rod 5, the limit gate 6, the PLC controller 9, the limit rail 16 , the rack 17, the gear 18 and the displacement sensor 19 are matched, the rack 17 is driven to move by the mining pneumatic box 4, and the gear 18 is rotated by the meshing between the rack 17 and the gear 18, thereby controlling the opening or closing of the limited-personnel gate 6. Compared with the traditional cylinder or motor driving method, the mining pneumatic box 4 has higher stability and safety in the mine environment, and simplifies the driving structure of the limited-personnel gate 6, so that the opening and closing of the limited-personnel gate 6 is more stable, and the use stability and service life of the limited-personnel gate equipment are improved. The specific model of the displacement sensor 19 is not limited, and it can meet the use requirements;

[0024] Furthermore, the upper and lower sides of the rotating rods 5 that are close to each other are fixedly connected with connecting rods 12, the connecting rods 12 are sleeved with the limited-personnel gate 6, and the limited-personnel gate 6 is equidistantly provided with fixing holes 13 on the side close to the connecting rods 12, and the outer wall of the connecting rods 12 is equidistantly provided with fixing bolts 14, and the fixing bolts 14 are threadedly connected with the fixing holes 13;

[0025] In the specific implementation process, it is worth pointing out that, through the cooperation between the rotating rod 5, the limited-personnel gate 6, the connecting rod 12, the fixing hole 13 and the fixing bolt 14, the connecting rod 12 and the limited-personnel gate 6 are fixed by the fixing bolt 14, so that the rotating rod 5 can drive the limited-personnel gate 6 to rotate, and by fixing the fixing bolt 14 with the fixing holes 13 at different positions, the distance between the limited-personnel gate 6 and the rotating rod 5 can be adjusted, so that the width of the limited-personnel gate 6 can be adjusted accordingly according to the channel distance between the two gate hosts 3, ensuring that the limited-personnel gate 6 has a good sealing effect on the channel between the gate hosts 3;

[0026] Further, magnetic card recognition modules 20 are provided on both sides of the gate host 3, and a camera 21 is provided above the magnetic card recognition module 20 of the gate host 3, and a passage indicator light 15 is provided on both sides of the limited-passenger gate 6. The passage indicator light 15 is used to display information on whether the limited-passenger gate 6 can be opened. The passage indicator light 15, the magnetic card recognition module 20 and the camera 21 are all electrically connected to the PLC controller 9;

[0027] In the specific implementation process, it is worth pointing out that, through the cooperation between the gate host 3, the PLC controller 9, the magnetic card recognition module 20 and the camera 21, by adding a magnetic card recognition and facial recognition system to the intelligent limited-personnel door, the intelligent limited-personnel door has a variety of recognition methods, can identify and record the identity of the operator, and transmit the identity recognition information to the enterprise's monitoring network in real time through the PLC controller 9, which is convenient for the enterprise to count and record the identity information of the underground workers and improve the convenience of enterprise management. The access indicator light 15 is used to display information on whether the limited-personnel gate 6 can be opened. The specific models of the access indicator light 15, the magnetic card recognition module 20 and the camera 21 are not limited, and can meet the use requirements;

[0028] Furthermore, an evacuation alarm light 22 is installed on the top of the gate host 3. The evacuation alarm light 22 is used to provide passage guidance for underground workers in case of emergency. The evacuation alarm light 22 is electrically connected to the PLC controller 9;

[0029] In the specific implementation process, it is worth pointing out that the evacuation alarm light 22 is used to provide passage guidance for underground workers in case of emergency, and can be remotely controlled by the PLC controller 9;

[0030] Specifically, when the underground intelligent limited-personnel door is used, the underground workers move to the entrance side of the limited-personnel door, and the pyro-infrared sensor 7 senses the change of infrared radiation at the entrance position, and transmits the sensing signal to the PLC controller 9 in real time. After receiving the signal, the PLC controller 9 sends an opening command of the limited-personnel gate 6 to the mining pneumatic box 4. The mining pneumatic box 4 controls the telescopic rod to extend, driving the rack 17 to move in the limit rail 16. The rack 17 meshes with the gear 18 to rotate the gear 18 90 degrees, so that the limited-personnel gate 6 is opened. The personnel gate 6 is opened to the side away from the entrance end. At the same time, the communication indicator light 15 on the personnel gate 6 gives a passage prompt. When the anti-pinch infrared sensor 11 senses the passage of personnel, it transmits the sensing signal to the PLC controller 9. After the personnel pass through, the PLC controller 9 automatically controls the telescopic rod of the mining pneumatic box 4 to retract, so that the personnel gate 6 is closed again. The PLC controller 9 counts the number of people passing through, and displays the number of underground workers and the remaining number of people who can enter through the underground intrinsic safety screen 10. When the intelligent When the number of people passing through the limited-personnel door reaches the safety limit, the PLC controller 9 turns on the sound and light alarm 8 to make a no-entry reminder. After the personnel reach the entrance position of the limited-personnel door, the PLC controller 9 will no longer open the limited-personnel gate 6 until an operator leaves from the exit side of the limited-personnel door. The corresponding number of people can be allowed to enter, so that the number of operators in the mine is always kept within the limit. Through the cooperation between the protective cover 1, the base 2, the gate host 3, the mining pneumatic box 4, the rotating rod 5, the limited-personnel gate 6, the mining pyro-infrared sensor 7, the sound and light alarm 8, the PLC controller 9 and the underground intrinsic safety screen 10, the mining pyro-infrared sensor 7 is used to sense the operators at both ends of the limited-personnel door, and the PLC controller 9 is used to control the automatic opening and closing of the limited-personnel door, and the number of operators in the mine is counted in real time. After the number of operators is reached, corresponding measures are taken, and there is no need to use a manual warning limit device or arrange special personnel to guard, so as to realize the intelligent control of the entry and exit of underground personnel, and strictly control the number of underground operators, so as to facilitate coal mine enterprises to better manage safety.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0032] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An underground intelligent restricted door, comprising a protective cover (1), characterized in that: A base (2) is provided at the bottom of the protective cover (1), and a gate host (3) is provided on both sides of the top of the base (2), and a mining pneumatic box (4) is installed inside the gate host (3). A rotating rod (5) is rotatably connected to the side of the gate host (3) that is close to each other, and the rotating rod (5) is transmission-connected to the mining pneumatic box (4). A limited-staff gate (6) is provided on the side of the rotating rod (5) that is close to each other, and anti-pinch infrared sensors (11) are equidistantly provided on the side of the gate host (3) that is close to each other. The top and rear of the protective cover (1) are both equipped with mining pyroelectric infrared sensors (7); one side of the inner wall of the protective cover (1) is equipped with an audible and visual alarm (8); one side of the inner wall of the protective cover (1) is equipped with an underground intrinsic safety screen (10); one side of the inner wall of the protective cover (1) is provided with a PLC controller (9); the PLC controller (9) is electrically connected to the mining pneumatic box (4), the mining pyroelectric infrared sensor (7), the audible and visual alarm (8), the PLC controller (9) and the anti-pinch infrared sensor (11), respectively.

2. The underground intelligent restricted door according to claim 1, characterized in that: The gate host (3) is fixedly connected to a limit rail (16) inside, the inner wall of the limit rail (16) is matched with a rack (17), the rack (17) is fixedly connected to the output end of the mining pneumatic box (4), the outer wall of the rotating rod (5) is fixedly connected to a gear (18), the gear (18) is meshingly connected to the rack (17), the inside of the gate host (3) is fixedly connected to a side away from the mining pneumatic box (4), the displacement sensor (19) is electrically connected to the PLC controller (9), and the sensing end of the displacement sensor (19) is fixedly connected to the rack (17).

3. The underground intelligent restricted door according to claim 1, characterized in that: The sides of the rotating rods (5) close to each other are fixedly connected with connecting rods (12) at the upper and lower sides, the connecting rods (12) are sleeved with the limited-personnel gate (6), the limited-personnel gate (6) is provided with fixing holes (13) at equal intervals on the side close to the connecting rod (12), and the outer wall of the connecting rod (12) is provided with fixing bolts (14) at equal intervals, and the fixing bolts (14) are threadedly connected with the fixing holes (13).

4. The underground intelligent restricted door according to claim 1, characterized in that: Magnetic card recognition modules (20) are provided on both sides of the barrier gate host (3); a camera (21) is provided on the barrier gate host (3) above the magnetic card recognition module (20); and traffic indicator lights (15) are provided on both sides of the limited-passenger gate (6); the traffic indicator lights (15), the magnetic card recognition module (20) and the camera (21) are all electrically connected to a PLC controller (9).

5. The underground intelligent restricted door according to claim 1, characterized in that: An evacuation alarm light (22) is installed on the top of the gate host (3), and the evacuation alarm light (22) is electrically connected to the PLC controller (9).

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