Nuclear power ventilation system door safety prevention and control system

Abstract

The utility model relates to a kind of house door safety prevention and control system of nuclear power ventilation system, including server, several gateways and several groups of door lock device, each group of door lock device is installed on the door body of each room of nuclear power ventilation system.The server is connected with three waste main control platform, and the switch of corresponding door lock device is controlled by gateway. Any door lock device includes shell, lock body structure and control module, step motor and lock rod are equipped in lock body structure, step motor drives lock rod to extend or retract;Control module is connected with step motor and gateway, lock rod action is controlled according to instruction, and whether lock rod is in place is judged by current and step number;The system also includes photoelectric sensor and proximity sensor, respectively for detecting the in-place state of lock rod and door body.The system is coordinated by electric type door lock and multiple sensors, realizes the interlock of multiple doors in nuclear power ventilation system and state monitoring, significantly improves the safety and management efficiency of nuclear power plant ventilation system operation.

Description

Technical Field

[0001] This utility model relates to the field of nuclear power safety, and in particular to a door security and control system for a nuclear power plant ventilation system. Background Technology

[0002] Currently, when nuclear power plant workers enter the relevant rooms of the DVW (Discharge Ventilation Waste System) and DVN (Discharge Ventilation Normal System), they must first inform the main control personnel of the three wastes by phone of the specific room information, and then the three wastes personnel will accompany them to the site with the key to complete the door opening and closing operation.

[0003] However, this lock-on and management model relying on traditional locks has significant problems: on the one hand, the process is time-consuming and labor-intensive; on the other hand, improper operation can easily lead to both doors opening simultaneously. Since many rooms in a nuclear power plant can form air ducts, opening both doors at the same time will trigger low airflow and high humidity alarms, thereby causing unexpected equipment unavailability risks. In addition, due to the high negative pressure in the rooms, if personnel are accidentally trapped inside, they will also face personal safety risks. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a door security and control system for a nuclear power plant ventilation system.

[0005] The technical solution adopted by this utility model to solve its technical problem is: to construct a door security and control system for a nuclear power plant ventilation system, including a server, several gateways, and several sets of door lock devices connected to the several gateways; each set of door lock devices includes multiple door lock devices for installation on each door in the corresponding room of the nuclear power plant ventilation system; The server is used to connect to the waste control platform, and the server controls the opening and closing of at least one door lock device through a gateway. Any door lock device includes a housing, and a lock body structure and a control module disposed in the housing; the lock body structure is installed in the housing and is provided with a stepper motor and a locking rod; the stepper motor is configured to drive the locking rod to extend out of the housing or retract into the housing; The control module is connected to the stepper motor and the corresponding gateway respectively. The control module is configured to command the stepper motor to extend and retract the locking rod according to the instructions received from the gateway. The control module has a judgment unit to determine whether the locking rod has extended or retracted in place based on the current and number of steps of the stepper motor. The door security control system also includes a photoelectric sensor for determining whether the locking bar has extended or retracted to the correct position, and a proximity sensor for determining whether the door has closed to the correct position. The photoelectric sensor is installed in the housing, and the proximity sensor is installed on the door.

[0006] In some embodiments, the lock body structure further includes a toothed plate and a sliding block; the toothed plate is disposed between the stepper motor and the sliding block; the sliding block is movably disposed and fixedly connected to the lock rod; The stepper motor provides power to the gear, which drives the sliding block to move, thereby causing the locking rod to extend and retract.

[0007] In some embodiments, the toothed plate has teeth on the side adjacent to the stepper motor, and rotates by meshing with the stepper motor; the toothed plate has a transmission arm on the side adjacent to the sliding block, which is connected to the sliding block to drive the sliding block to move linearly when the toothed plate rotates.

[0008] In some embodiments, the housing is provided with a mounting sidewall for mounting the lock body structure; The sliding block is located between the transmission arm and the mounting sidewall; two baffles are connected to the side of the sliding block facing away from the mounting sidewall; the transmission arm is located between the two baffles and drives the sliding block to move by contacting one of the baffles.

[0009] In some embodiments, the housing is provided with a mounting sidewall for mounting the lock body structure; One end of the locking rod is embedded in the sliding block, and the other end of the locking rod is located outside the sliding block; a guide rail is provided between the sliding block and the mounting side wall for the sliding block to be installed and slide on it.

[0010] In some embodiments, the lock body structure further includes a mechanical lock cylinder, which has a lock hole and a rotatable movable member. The movable member is connected to the toothed plate, and the lock hole is used for inserting a key to rotate the toothed plate.

[0011] In some embodiments, the control module includes a TB6600 two-phase hybrid stepper motor chip.

[0012] In some embodiments, the door lock device further includes an alarm module for emitting sound and a mute button for turning off the sound of the alarm module; the alarm module is connected to the control module, and the mute button is mounted on the housing.

[0013] In some embodiments, the door lock device is further provided with an SOS module, the SOS module having an emergency call button mounted on the housing.

[0014] In some embodiments, each gateway includes a logic control module for independently commanding at least one door lock device to open or close.

[0015] The implementation of this utility model has the following beneficial effects: The door security and control system of this nuclear power plant ventilation system realizes the interlocking configuration of airtight doors in the nuclear power plant through the collaboration of electric door locks and multiple sensors, which significantly improves the safety and convenience of the nuclear power plant ventilation system. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 This is a system schematic diagram of the door security and control system of the nuclear power plant ventilation system in some embodiments of the present invention; Figure 2 This is a schematic diagram of the door lock device of this utility model in some embodiments; Figure 3 This is a circuit diagram of the stepper motor chip used in some embodiments of the door lock device of this utility model.

[0017] Figure label: Server 1; Gateway 2; Door lock device 3; Housing 31; Mounting side wall 311; Lock body structure 32; Stepper motor 321; Lock rod 322; Gear 323; Gear 3231; Transmission arm 3232; Sliding block 324; Baffle 325; Stepper motor chip 331; Mechanical lock cylinder 34; Lock hole 341; Moving parts 342; Three waste main control platform 4. Detailed Implementation

[0018] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0019] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0020] In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0021] Please refer to Figure 1 This utility model constructs a door security and control system for a nuclear power plant ventilation system, which mainly includes a server 1, several gateways 2, and several sets of door lock devices 3 connected to the several gateways 2; each set of door lock devices 3 includes multiple door lock devices 3.

[0022] Server 1 is connected to the waste management platform 4 and is used to receive instructions from and send data to the waste management platform 4. Instructions may include door opening and closing commands. Data may include door lock status, alarm information, and operational data such as permission logs.

[0023] Gateway 2 is used to establish a connection and forward data between server 1 and door lock device 3, enabling regional door lock control and status detection. Preferably, gateway 2 includes a communication module, a logic control module, a power management module, and a data storage unit; wherein, the communication module is used to establish a wired or wireless communication connection with server 1, receive control commands issued by server 1, and upload door lock status information; the logic control module is used to send unlocking or locking signals to the corresponding door lock device 3 according to the instructions of server 1 or local policies; the data storage unit is used to record door lock operation logs and communication data so that local control and post-event traceability can still be achieved in the event of network interruption or abnormality.

[0024] Door lock device 3 is used to install on the door in the nuclear power plant ventilation system.

[0025] Server 1 can control at least one door lock device 3 to open and close based on received instructions via gateway 2. Alternatively, gateway 2 can independently control at least one door lock device 3 to open and close based on local policies.

[0026] For example, in a nuclear power plant ventilation system, multiple rooms are arranged. Each room is equipped with multiple doors. The number of gateways 2 is adapted to the number of rooms, and each gateway 2 is connected to a set of door lock devices 3; any set of door lock devices 3 represents the door lock devices 3 installed on each door in a single room. This door security and control system can be configured as follows: when workers need to open a door, the system provides the necessary door opening information to the waste disposal personnel; the waste disposal personnel confirm the door opening area and then issue an opening command to the server 1 through the waste disposal main control platform 4; after receiving the command, the server 1 controls the corresponding door lock device 3 to open via the corresponding gateway 2. After the workers complete their work, they provide feedback to the waste disposal main control platform 4. If the corresponding door lock is a controlled door, the waste disposal personnel issue a closing command through the waste disposal main control platform 4, and the server 1 executes the locking operation via gateway 2; if the corresponding door lock is a non-controlled door, the door lock device 3 can automatically perform interlocking closure through gateway 2, without manual intervention from the waste disposal personnel.

[0027] Secondly, the doors in the nuclear power plant's ventilation system are airtight, designed to prevent the leakage of radioactive gases and maintain stable pressure in specific areas. For safety reasons, only one door can be opened at a time.

[0028] Please refer to Figure 2Any door lock device 3 may include a housing 31, and a lock body structure 32 and a control module (not shown) disposed within the housing 31. The housing 31 has a mounting sidewall 311 for mounting the lock body structure 32. The lock body structure 32 has a movable locking rod 322, which is configured to extend out of the housing 31 to enter the latch groove, or retract from the housing 31 into the housing 31. The control module is connected to the lock body structure 32 and the corresponding gateway 2 respectively, to control the lock body structure 32 to open and close the lock according to the instructions received from the gateway 2.

[0029] The directions in which the locking rod 322 extends and retracts are referred to as the telescopic direction.

[0030] Continue reading Figure 2 The lock body structure 32 may include a stepper motor 321, a toothed plate 323, a sliding block 324, and a locking rod 322. The stepper motor 321 provides power and is connected to a control module. The control module drives the stepper motor 321 to operate based on received signals. The toothed plate 323 is connected to the stepper motor 321 for transmission. The sliding block 324 is fixedly connected to the locking rod 322. The toothed plate 323 can drive the sliding block 324 to move in the extension / retraction direction, and the locking rod 322 moves along with the sliding block 324, thereby realizing the locking and unlocking mechanism.

[0031] A toothed plate 323 is disposed between a stepper motor 321 and a sliding block 324. The toothed plate 323 has teeth 3231 on the side adjacent to the stepper motor 321. Correspondingly, at least one gear structure is provided between the stepper motor 321 and the toothed plate 323, transmitting the power generated by the stepper motor 321 to the toothed plate 323 through meshing, allowing the toothed plate 323 to rotate. A transmission arm 3232 is provided on the side of the toothed plate 323 adjacent to the sliding block 324, extending towards the sliding block 324 to drive the sliding block 324 to move.

[0032] In this embodiment, as Figure 2 As shown, the sliding block 324 is positioned between the transmission arm 3232 and the mounting side wall 311 of the housing 31. Correspondingly, two baffles 325 are fixed on the side of the sliding block 324 facing away from the mounting side wall 311. The two baffles 325 are arranged at intervals and are located on the same plane as the transmission arm 3232. The transmission arm 3232 is located between the two baffles 325 and drives the sliding block 324 to extend or retract by contacting one of the baffles 325.

[0033] The locking rod 322 is fixedly connected to the sliding block 324, so that the locking rod 322 and the sliding block 324 move together. One end of the locking rod 322 is embedded in the side of the sliding block 324 facing the locking groove, and the other end of the locking rod 322 is located outside the sliding block 324.

[0034] The sliding block 324 is movably disposed on the mounting side wall 311 of the housing 31 and can move along the extension direction. For example, a guide rail is provided between the sliding block 324 and the mounting side wall 311, the extension direction of the guide rail is parallel to the extension direction, the sliding block 324 is mounted on the guide rail and can slide on the guide rail.

[0035] Stepper motor 321 can be any stepper motor 321. (See reference.) Figure 3 The control module includes a TB6600 two-phase hybrid stepper motor chip 331. The stepper motor chip 331 may have CLK, DIR, and EN pins. The CLK pin drives the stepper motor 321 to rotate one step angle for each received pulse. The DIR pin switches the rotation direction (clockwise / counterclockwise) of the stepper motor 321 based on received high / low level signals. The EN pin switches the stepper motor 321 between operating and sleep states based on received high / low level signals.

[0036] Secondly, the control module includes a judgment unit (not shown in the figure), which is configured to determine whether the extension or retraction of the locking lever 322 is complete based on the current supplied to the stepper motor 321 and the number of steps taken by the stepper motor 321. Understandably, during the process of driving the locking lever 322 to extend or retract, the current value of the stepper motor 321 corresponds to the load resistance. When the locking lever 322 moves to its limit position (i.e., fully extended or fully retracted), the rotation of the motor is blocked by the mechanical limiting structure, resulting in a momentary increase in load and current, while the number of steps taken by the stepper motor 321 no longer increases. The judgment unit of the control module monitors the drive current and step count of the stepper motor 321 in real time. When a sudden change in current is detected and the number of steps reaches a preset threshold, it determines that the locking lever 322 is in place, thereby achieving electrical judgment of the locking lever 322's operational state.

[0037] The door lock device 3 is also equipped with a photoelectric sensor (not shown) to determine whether the extension or retraction of the locking rod 322 is complete. Understandably, the photoelectric sensor is positioned along the movement path of the locking rod 322. When the locking rod 322 extends or retracts to a predetermined position, it blocks or releases the emitted beam of the photoelectric sensor, thereby causing a change in the signal state at the receiving end. The control module determines whether the current state of the locking rod 322 is complete based on the signal change from the photoelectric sensor.

[0038] The door security system also includes a proximity sensor (not shown in the figure), which can be installed on the edge of the door to determine whether the door is fully closed. Understandably, the proximity sensor can be in the form of a Hall element, reed switch, or capacitive proximity switch, working in conjunction with a corresponding magnet or metal trigger on the door or door frame. When the door is fully closed, the trigger enters the sensing range of the proximity sensor, generating a detection signal; when the door is not fully closed or is open, the sensor output signal disappears. Gateway 2 determines in real time whether the door is in the fully closed state based on the output status of the proximity sensor, thereby achieving automatic monitoring of the door position and linkage control of the locking status; of course, information on whether the door is in the fully closed state is also transmitted back to the waste control platform 4.

[0039] Through the aforementioned multiple detection methods, the system can simultaneously acquire the door lock's operational status and the door's closing status, achieving full-process monitoring of the door lock device 3. It can also accurately determine whether the door has been successfully closed, thus achieving logical interlocking and allowing only one airtight door to open at a time. When contradictory detection results occur (e.g., the locking lever 322 has extended but the door is not closed), the system can trigger an alarm or prevent further operation, further improving the reliability and intelligence level of the nuclear power plant's ventilation system safety control. The door lock device 3 is also equipped with an alarm module (not shown in the figure). The alarm module can be a buzzer or a voice alarm, capable of emitting sound. The alarm module is connected to the control module and can be configured to emit a pre-set voice prompt indicating the door is closing when the door lock is opened. Optionally, the pre-set duration can be 8-10 seconds.

[0040] The door lock device 3 is also equipped with a mute button (not shown). Operators can press this mute button to turn off the alarm module's sound.

[0041] The door lock device 3 is also equipped with an SOS module (not shown). The SOS module has a distress button installed on the housing 31. The operator can use this distress button to send a distress signal to the waste control platform 4.

[0042] Secondly, you can refer to Figure 2 The lock body structure 32 may also include a mechanical lock cylinder 34. Understandably, the lock body structure 32 can be opened and closed via electronic control or on-site mechanical triggering, depending on site requirements. The mechanical lock cylinder 34 has a keyhole 341 and a rotatable movable component 342. The movable component 342 is connected to a toothed plate 323. A key can be inserted into the keyhole 341 and rotated, causing the movable component 342 to rotate, thereby driving the toothed plate 323 to rotate.

[0043] In summary, this application, by constructing a door security and control system for the nuclear power plant ventilation system, achieves interlocked configuration of airtight doors within the nuclear power plant, significantly improving the safety and convenience of the nuclear power plant ventilation system. Specifically: This door security system is equipped with multiple detection methods to monitor the door's open / closed status and lock position in real time. Based on the system's hardware, logical interlocking can be implemented, allowing only one airtight door to open at a time, ensuring stable ventilation system pressure and radiation protection safety. If a door is abnormally opened, the system can automatically control the locks of other doors in the area to remain closed or automatically close, preventing the risk of airtightness breaches and radioactive gas leaks caused by multiple doors opening simultaneously.

[0044] This system features both local and remote alarm functions. In case of accidental opening, prolonged failure to close, or abnormal operation, alarm prompts can be simultaneously issued at the door lock and the waste control platform 4. For example, if the door is left open for more than a preset time (e.g., 10 seconds) without being closed, the local lock box can emit an alarm sound to urge personnel to close the door in time, thus avoiding affecting airflow and equipment operation.

[0045] Secondly, this door lock device 3 adopts a highly efficient and energy-saving power management mode. In standby mode, except for necessary sensors and the communication unit of the control module, all other electronic components enter a low-power mode, significantly reducing energy consumption. In addition, the door lock device 3 is equipped with a rechargeable battery as the main power source. When the external power is interrupted, the battery can still ensure the normal operation of the door lock, enhancing the reliability and emergency response capability of the system. When the battery is depleted, it can be manually unlocked using a mechanical key, ensuring safe entry or evacuation even in extreme circumstances.

[0046] Finally, it should be noted that this application mainly protects the hardware part of the door security and control system. As for the software logic program part, relevant technologies can be consulted, and it will not be elaborated here.

[0047] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A door security and control system for a nuclear power plant ventilation system, characterized in that, It includes a server (1), several gateways (2), and several sets of door lock devices (3) connected to the several gateways (2); each set of door lock devices (3) contains multiple door lock devices (3) for installation on the doors of the corresponding rooms in the nuclear power plant ventilation system; The server (1) is used to connect to the three wastes main control platform (4), and the server (1) controls the opening and closing of at least one corresponding door lock device (3) through the gateway (2); Any door lock device (3) includes a housing (31), a lock body structure (32) and a control module disposed in the housing (31); the lock body structure (32) is installed in the housing (31) and is provided with a stepper motor (321) and a locking rod (322); the stepper motor (321) is configured to drive the locking rod (322) to extend out of the housing (31) or retract into the housing (31); The control module is connected to the stepper motor (321) and the corresponding gateway (2) respectively. The control module is configured to command the stepper motor (321) to drive the locking rod (322) to extend and retract according to the instructions received from the gateway (2). The control module has a judgment unit to determine whether the locking rod (322) has extended or retracted in place according to the current and number of steps of the stepper motor (321). The door security control system also includes a photoelectric sensor for determining whether the locking rod (322) has extended or retracted to the correct position, and a proximity sensor for determining whether the door has closed to the correct position. The photoelectric sensor is installed in the housing (31), and the proximity sensor is installed on the door.

2. The door security and control system of the nuclear power plant ventilation system according to claim 1, characterized in that, The lock body structure (32) further includes a toothed plate (323) and a sliding block (324); the toothed plate (323) is disposed between the stepper motor (321) and the sliding block (324); the sliding block (324) is movably disposed and fixedly connected to the lock rod (322); The stepper motor (321) provides power to the toothed plate (323), which drives the sliding block (324) to move, thereby driving the locking rod (322) to extend and retract.

3. The door security and control system of the nuclear power plant ventilation system according to claim 2, characterized in that, The toothed plate (323) has teeth (3231) on the side adjacent to the stepper motor (321), and the toothed plate (323) rotates by meshing with the stepper motor (321); the toothed plate (323) has a transmission arm (3232) on the side adjacent to the sliding block (324), which is connected to the sliding block (324) to drive the sliding block (324) to move linearly when the toothed plate (323) rotates.

4. The door security and control system of the nuclear power plant ventilation system according to claim 3, characterized in that, The housing (31) is provided with a mounting sidewall (311) for mounting the lock body structure (32). The sliding block (324) is located between the transmission arm (3232) and the mounting sidewall (311); the side of the sliding block (324) facing away from the mounting sidewall (311) is connected to two baffles (325) arranged at intervals; the transmission arm (3232) is located between the two baffles (325) and drives the sliding block (324) to move by contacting one of the baffles (325).

5. The door security and control system of the nuclear power plant ventilation system according to claim 3, characterized in that, The housing (31) is provided with a mounting sidewall (311) for mounting the lock body structure (32). One end of the locking rod (322) is embedded in the sliding block (324), and the other end of the locking rod (322) is located outside the sliding block (324); a guide rail is provided between the sliding block (324) and the mounting side wall (311) for the sliding block (324) to be installed and slide on it.

6. The door security and control system of the nuclear power plant ventilation system according to claim 3, characterized in that, The lock body structure (32) also includes a mechanical lock cylinder (34), which has a lock hole (341) and a rotatable movable part (342). The movable part (342) is connected to the toothed plate (323), and the lock hole (341) is used for inserting a key to drive the toothed plate (323) to rotate.

7. The door security and control system of the nuclear power plant ventilation system according to claim 1, characterized in that, The control module includes a TB6600 two-phase hybrid stepper motor chip (331).

8. The door security and control system of the nuclear power plant ventilation system according to claim 1, characterized in that, The door lock device (3) is also provided with an alarm module for sound generation and a mute button for turning off the sound of the alarm module; the alarm module is connected to the control module and the mute button is installed on the housing (31).

9. The door security and control system of the nuclear power plant ventilation system according to claim 1, characterized in that, The door lock device (3) is also provided with an SOS module, which has an emergency call button installed on the housing (31).

10. The door security and control system of the nuclear power plant ventilation system according to claim 1, characterized in that, Each of the gateways (2) is provided with a logic control module for independently commanding at least one door lock device (3) to open or close.

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