Safety interlocking device in radiation workplace

Abstract

The utility model discloses a safety interlocking device in a radiation working place. The safety interlocking device comprises an upper computer, a PLC (Programmable Logic Controller), a plurality of site cleaning control boxes and an emergency stop control box, the PLC is respectively connected with each site cleaning control box and each emergency stop control box; the emergency stop control box comprises a frame, an emergency stop button, an emergency stop strobe lamp and an emergency stop indicator lamp are arranged outside the frame, and a terminal strip, a relay and a voice prompter are arranged inside the frame; the field cleaning control box comprises a control box shell, a field cleaning warning lamp and a field cleaning button are arranged outside the field cleaning control box, and a voice prompter, a relay and a terminal strip are arranged inside the field cleaning control box; the emergency stop stroboscope lamp is used for being lightened to prompt evacuation in the process that the accelerator is ready to operate and is lightened to trigger an interlocking protection signal when the emergency stop button is shot down; the emergency stop button is used for sending a signal to the PLC to cut off the accelerator beam when the emergency stop button is shot down; the site cleaning warning lamp is used for reminding workers in the tunnel to leave, and the site cleaning button is used for confirming that site cleaning of the corresponding area takes effect.

Description

Technical Field

[0001] The utility model is composed of a set of emergency stop and clearing devices, including a cabinet, circuit design, wiring design, and electronic device design, and belongs to the field of particle accelerator radiation protection. Background Art

[0002] Electron or proton accelerators generate radiation when in operation. If workers have not yet exited the tunnel when the accelerator is turned on, they are at risk of exposure, causing irreparable damage to their health. Therefore, on the one hand, an emergency stop device is required within the radiation workplace control area. In an emergency, workers can press the emergency stop button to immediately cut off the accelerator beam or prevent the accelerator from starting. On the other hand, multiple search and clearance devices are deployed within the radiation workplace control area. Before the accelerator is turned on, the radiation workplace control area needs to be searched and cleared. During the search and clearance process, search personnel will pass through search points in sequence along a predetermined route, check and clear personnel within the control area, and confirm that all personnel in the tunnel have evacuated.

[0003] Clearance and emergency stop devices should be designed according to the electrical manual. Switches, indicators, relays, and other devices should be integrated into a control box connected to the PLC. When triggered, they should send a signal immediately, allowing the system to follow the programmed process and protect personnel safety.

[0004] Currently, particle accelerators in China and abroad employ numerous safety interlock devices within radiation workplaces, typically consisting of emergency stop buttons, clear buttons, and indicator lights. While these devices meet practical requirements, they lack intelligence and lack clear human-machine interaction. Furthermore, internal wiring is cluttered and messy, leading to high maintenance costs.

[0005] To sum up, these two more intelligent devices are urgently needed. The components inside the control box should be safe and reliable, the appearance should be simple, the color should be eye-catching, it should be easy to install, and the human-computer interaction should be simple and clear. Utility Model Content

[0006] In response to the problems existing in the prior art, the purpose of the utility model is to provide an emergency stop and clearance device for a radiation workplace, which has the characteristics of small size, simple operation, rapid response and more friendly human-computer interaction.

[0007] This utility model integrates all necessary components into a single control box for both the clearing control box and the emergency stop control box. The emergency stop control box includes a metal frame, an emergency stop strobe light, an emergency stop status indicator, an emergency stop button, a voice prompt, relays, and a terminal block. The clearing control box also includes a control box housing, a clearing warning light, three-state clearing indicators, a clearing button, a voice prompt, relays, and a terminal block. The connected PLC logic has also been optimized.

[0008] This control box is used in radioactive workplaces, so the design principles should follow the following:

[0009] 1. Hardware reliability: key interlocking signals must be given by hardware devices through hard connections;

[0010] 2. Failure protection: When key equipment fails, the system has corresponding emergency protection measures to restore the system to a safe state;

[0011] 3. Redundant design: Redundant design should be adopted for key signals to ensure system reliability and reduce system failure time.

[0012] 4. People-oriented: The system should have humanized characteristics - simple and reasonable, easy to operate, good human-computer interaction, and easy maintenance.

[0013] The technical solution of the utility model is:

[0014] A safety interlock device for a radiation workplace, characterized by comprising a host computer, a PLC controller, and a plurality of clearance control boxes and emergency stop control boxes for deployment in the radiation workplace; the PLC controller is connected to each of the clearance control boxes and the emergency stop control box, respectively, and the host computer is connected to the PLC controller for monitoring the status of the PLC controller;

[0015] The emergency stop control box includes a frame, the outside of which is provided with an emergency stop button, an emergency stop strobe light, and an emergency stop indicator light; the inside of the frame is provided with a voice prompter;

[0016] The clearing control box includes a control box shell, the outside of the control box shell is provided with a clearing warning light and a clearing button, and the inside of the control box shell is provided with a voice prompter;

[0017] The emergency stop strobe light is connected to the PLC controller and is used to light up to remind staff to evacuate the site when the accelerator is ready to run; and is used to light up and trigger an interlock protection signal when the emergency stop button is pressed;

[0018] The emergency stop indicator light is connected to the PLC controller and is used to indicate whether the emergency stop button is effective when it is pressed; when the emergency stop button is pressed, the controller PLC turns on the emergency stop indicator light to prompt the operator that the emergency stop button is effectively pressed;

[0019] The emergency stop button is connected to the PLC controller and is used to send a signal to the PLC controller to cut off the accelerator beam when the emergency stop button is pressed;

[0020] The voice prompter is connected to the PLC controller and is used to broadcast corresponding voices when receiving different trigger conditions of the PLC controller;

[0021] The clearance warning light is connected to the PLC controller. When the accelerator is in the process of preparing to start or searching and clearing the tunnel, the PLC controller controls the clearance warning light to light up, so as to remind the staff in the tunnel to leave.

[0022] The clearing button is connected to the PLC controller and is used to generate a trigger signal to the PLC controller when the clearing personnel presses the search and clearing button, confirming that the clearing of the corresponding area of ​​the search and clearing button is effective; the PLC controller controls the voice prompter in the control box to broadcast the voice of the completion of the clearing according to the trigger signal.

[0023] Furthermore, the emergency stop control box is also provided with an emergency stop control box lock for prohibiting non-operating personnel from opening the emergency stop control box.

[0024] Furthermore, the emergency stop control box is also provided with an emergency stop control box handle for facilitating maintenance personnel to open the emergency stop control box during maintenance.

[0025] Furthermore, a not-yet-searched clearance indicator light is provided on the outside of the control box housing, and the PLC controller controls the state of the not-yet-searched clearance indicator light through the terminal block, so as to send a reminder to the clearance personnel that the clearance status of the area where the clearance indicator light is located has not yet been searched.

[0026] Furthermore, a searching and clearing indicator light is provided on the outside of the control box housing, and the PLC controller controls the state of the searching and clearing indicator light through the terminal block, so that the indicator light is lit during the clearing process.

[0027] Furthermore, a clearing completion indicator light is provided on the outside of the control box housing, and the PLC controller controls the state of the clearing completion indicator light through the terminal block to prompt the clearing personnel that the corresponding area has been cleared.

[0028] Furthermore, the clearing control box is provided with a clearing control box lock for prohibiting non-operating personnel from opening the clearing control box.

[0029] Furthermore, the clearing control box is provided with a clearing control box handle for facilitating maintenance personnel to open the clearing control box during maintenance.

[0030] The emergency stop control box of the present application includes a basic frame of the control box, and an emergency stop button, a strobe light, and an emergency stop indicator light are arranged on the outside of the frame; a terminal block, a relay, and a voice prompter are arranged inside the basic frame.

[0031] The design scheme diagram is as followsFigure 1 (a) Figure 2 、 Figure 4 shown.

[0032] Emergency stop strobe light 1: Directly connected to the PLC controller, it serves as a warning device. It illuminates when the accelerator is preparing to operate, prompting personnel to evacuate the site. It also illuminates when someone presses the emergency stop button, alerting maintenance personnel that the button has been pressed, triggering a normal interlock protection signal. This interlock protection signal is generated by the PLC controller of the personal safety interlock system, and when triggered, the accelerator stops operating.

[0033] Emergency Stop Indicator 2: Directly connected to the PLC controller, it serves as a status indicator. It indicates whether the emergency stop button 3 at this location has been pressed. When the emergency stop button at this location is pressed, the PLC controller responds promptly and outputs a signal to Emergency Stop Indicator 2 via a relay. Emergency Stop Indicator 2 illuminates, alerting the operator that the button has been pressed.

[0034] Emergency Stop Button 3: When the button is pressed, a signal is sent via hardwire to the PLC controller, which then shuts off the accelerator beam to ensure personnel safety. After the emergency stop button is pressed, the operator must notify the operator to reset the button using a dedicated key at the trigger location. The operator must then confirm the reset operation at the control station cabinet. Multiple emergency stop control boxes are typically deployed within the control area of ​​the radiation workplace, spaced approximately 13 meters apart. This ensures that nearby personnel can promptly press the button to ensure their own safety.

[0035] Voice Prompt: Hardwired to the PLC controller via relays, the PLC controller triggers the voice prompt to play corresponding voice messages based on specific trigger conditions. The voice prompt includes multiple Chinese and English voice options, and plays corresponding content in appropriate situations. For example, when the accelerator is about to start, it will broadcast "Accelerator is about to start, please leave immediately. If you are trapped in the interlocked area, please press the emergency stop button"; when the emergency stop button is triggered, it will broadcast "Accelerator Emergency Stop" and other corresponding content.

[0036] Emergency stop control box lock 4: Lock the emergency stop control box and non-operating personnel are prohibited from opening it.

[0037] The emergency stop control box handle 5 is convenient for maintenance personnel to open the emergency stop control box during maintenance.

[0038] Clearance Warning Light 6: The PLC controller controls whether the strobe light is on or off. The prerequisites for the clearance warning light to illuminate are: ① During the accelerator preparation and start-up process; ② During the search and clearance process. The main purpose of the strobe light is to prompt personnel in the tunnel to leave as soon as possible.

[0039] Unsearched Clearance Indicator 7: This indicator is controlled by the PLC controller and is used to provide information to the clearance personnel. It is green and illuminates when the site has not been cleared or when the clearance of the entire area has been disrupted. It turns off when the site is cleared.

[0040] Searching for clearing indicator light 8: This light is yellow and is on during the clearing process.

[0041] Point Clearance Complete Indicator 9: This indicator is used as a reminder for the clearing personnel. This indicator is red and turns on after the search and clearance steps for this point are completed.

[0042] Search and Clear Button 10: When clearing the area, press this button to activate the point-by-point clearing. This button is designed to be self-resetting, so pressing it multiple times will not affect the entire search and clearing logic. When the clearing personnel press the search and clear button, a trigger signal is generated to the PLC controller. Based on the trigger signal, the PLC controller controls the voice prompt in the control box to broadcast "Search and Clear at this point has taken effect" and controls the point-by-point clearing completion indicator to light up.

[0043] Voice prompt: The voice prompt is embedded with various Chinese and English voice content, which is played in appropriate situations. For example, during the entire clearing process, it will repeatedly broadcast "This area is being cleared, please leave immediately..." until the entire clearing process is completed or canceled; when the clearing is completed, it will prompt "Search and clearing are completed"; during the clearing process, when you press the search and clear button 10 at each new clearing point, it will prompt "Search and clearing at this point has taken effect, please proceed to the next point to continue clearing."

[0044] Clearance control box lock 11: Lock the clearance control box and non-operating personnel are prohibited from opening it.

[0045] Clearance control box handle 12: It is convenient for maintenance personnel to open the clearance control box during maintenance.

[0046] The interior of both control boxes is composed of signal terminal blocks, relays, and voice prompters.

[0047] Signal terminal block 13: This is used to transfer signals between the emergency stop and clearance control box's internal hardware and the PLC controller, as well as power to electrical components. Signal terminal block 13 connects the PLC controller to the emergency stop strobe light 1, emergency stop indicator light 2, emergency stop button 3, clearance warning light 6, search and clearance indicator light 7, search and clearance indicator light 8, current point clearance complete indicator light 9, and search and clearance button 10. The emergency stop button 3 and search and clearance button 10 are inputs to the PLC controller, while the others are output signals.

[0048] Relay 14: Relays act as circuit isolation within the circuit. By switching the relay on and off, they isolate the PLC control circuit from the field device circuit, preventing interference. This design helps protect circuits and devices, preventing terminal device circuit problems from affecting the normal operation of the PLC controller. Voice prompter 15 is connected to the PLC controller's output module via a relay, with each voice prompt triggered by a different output address of the PLC controller.

[0049] Voice Prompt 15: Both the emergency stop and clear control boxes have a built-in voice prompt. Multiple Chinese and English voice messages are embedded in the voice prompt. The PLC controller drives the speaker to broadcast the corresponding content in different scenarios.

[0050] System architecture such as Figure 5 The diagram below shows the communication between the clearing control box and the emergency stop control box. It is divided into three layers: the upper layer is the host computer operation display interface, the middle layer is the PLC controller, and the bottom layer is the emergency stop clearing control box operating equipment. The upper and middle layers communicate using the TCP / IP protocol, while the middle and bottom layers communicate using RVVP hard-wired connections.

[0051] The advantages of this utility model are as follows:

[0052] The application scenario of the clearing device of this utility model is to be deployed in a radiation workplace. Before the accelerator is operated, it forces the staff to search and clear the radiation workplace according to a predetermined route within a fixed time, check and clear the personnel in the control area, and effectively ensure personal safety.

[0053] The application scenario of the emergency stop device of the utility model is to be deployed in a radiation workplace. In an emergency, the staff can press the emergency stop button to immediately cut off the accelerator beam or prevent the accelerator from starting up to ensure personal safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 This is the external schematic diagram of the emergency stop and clearance control box;

[0055] (a) Emergency stop control box, (b) Clearance control box.

[0056] Figure 2 This is the side view of the emergency stop control box;

[0057] Figure 3 Side view of the clearing control box

[0058] Figure 4 This is a schematic diagram of the interior of the emergency stop control box and the clearance control box.

[0059] Figure 5 This is the system architecture diagram.

[0060] Among them, 1-Emergency stop strobe light, 2-Emergency stop indicator light, 3-Emergency stop button, 4-Emergency stop control box lock, 5-Emergency stop control box handle, 6-Clearance warning light, 7-Clearance indicator light not yet searched, 8-Searching for clearance indicator light, 9-Clearance completion indicator light for this point, 10-Search for clearance button, 11-Clearance control box lock, 12-Clearance control box handle, 13-Signal terminal block, 14-Relay, 15-Voice prompter, 16-Upper computer, 17-PLC controller, 18-Clearance control box, 19-Emergency stop control box. DETAILED DESCRIPTION

[0061] The present invention will be described in further detail below with reference to the accompanying drawings. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0062] Clearance Control Boxes: Several clearance control boxes are deployed within the radiation workplace. Before the accelerator is turned on, the radiation workplace must be searched and cleared. During this process, search personnel follow a predetermined route, passing through search points in sequence, verifying that the controlled area is clear of personnel, and then operate the search and clearance devices to complete the search and clearance process. When a worker presses the clear button, the PLC controller receives a signal and sends it to the clearance control box, which executes a series of interlocking actions, including illuminating the search and clearance indicator light, illuminating the clearance warning light, and announcing "This area is being cleared..."

[0063] Emergency stop control box: Emergency stop devices are installed every 10-15 meters within the radiation workplace control area. In an emergency, a worker can press an emergency stop button to immediately shut off the accelerator beam. When triggered, the emergency stop button transmits a signal to the PLC controller. The PLC controller, based on program logic, issues a command to the emergency stop control box, causing the clearing warning light to flash and the voice prompt to "Accelerator Emergency Stop." It also sends a signal to the accelerator control system to shut off the beam.

[0064] While specific embodiments of the present invention are disclosed for illustrative purposes, their purpose is to facilitate understanding and implementation of the present invention. Those skilled in the art will appreciate that various substitutions, variations, and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the present invention should not be limited to the disclosed preferred embodiments; the scope of protection claimed by the present invention shall be determined by the scope of the claims.

Claims

1. A safety interlock device in a radiation workplace, characterized in that: It includes a host computer, a PLC controller, and several clearance control boxes and emergency stop control boxes for deployment in a radiation workplace; the PLC controller is connected to each of the clearance control boxes and the emergency stop control box, and the host computer is connected to the PLC controller to monitor the status of the PLC controller; The emergency stop control box includes a frame, the outside of which is provided with an emergency stop button, an emergency stop strobe light, and an emergency stop indicator light; the inside of the frame is provided with a voice prompter; The clearing control box includes a control box shell, the outside of the control box shell is provided with a clearing warning light and a clearing button, and the inside of the control box shell is provided with a voice prompter; The emergency stop strobe light is connected to the PLC controller and is used to light up to remind staff to evacuate the site when the accelerator is ready to run; and is used to light up and trigger an interlock protection signal when the emergency stop button is pressed; The emergency stop indicator light is connected to the PLC controller and is used to indicate whether the emergency stop button is effective when it is pressed; when the emergency stop button is pressed, the PLC controller turns on the emergency stop indicator light to prompt the operator that the emergency stop button is effectively pressed; The emergency stop button is connected to the PLC controller and is used to send a signal to the PLC controller to cut off the accelerator beam when the emergency stop button is pressed; The voice prompter is connected to the PLC controller and is used to broadcast corresponding voices when receiving different trigger conditions of the PLC controller; The clearance warning light is connected to the PLC controller. When the accelerator is in the process of preparing to start or searching and clearing the tunnel, the PLC controller controls the clearance warning light to light up, so as to remind the staff in the tunnel to leave. The clearing button is connected to the PLC controller and is used to generate a trigger signal to the PLC controller when the clearing personnel presses the search and clearing button, confirming that the clearing of the corresponding area of ​​the search and clearing button is effective; the PLC controller controls the voice prompter in the control box to broadcast the voice of the completion of the clearing according to the trigger signal.

2. The safety interlock device in the radiation workplace according to claim 1, characterized in that: The emergency stop control box is also provided with an emergency stop control box lock for prohibiting non-operating personnel from opening the emergency stop control box.

3. The safety interlock device in the radiation workplace according to claim 2, characterized in that: The emergency stop control box is also provided with an emergency stop control box handle, which is used to facilitate maintenance personnel to open the emergency stop control box during maintenance.

4. The safety interlock device in a radiation workplace according to claim 1, 2 or 3, characterized in that: The control box housing is provided with an indicator light for not yet searched and cleared. The PLC controller controls the state of the indicator light for not yet searched and cleared via a terminal block, and is used to send a reminder to the clearing personnel that the area where the indicator light is located has not yet been searched for clearance.

5. The safety interlock device in a radiation workplace according to claim 1, 2 or 3, characterized in that: The outside of the control box housing is provided with a searching and clearing indicator light, and the PLC controller controls the state of the searching and clearing indicator light through the terminal block, so that the indicator light is lit during the clearing process.

6. The safety interlock device in a radiation workplace according to claim 1, 2 or 3, characterized in that: A clearing completion indicator light is provided on the outside of the control box housing, and the PLC controller controls the state of the clearing completion indicator light through a terminal block to prompt the clearing personnel that the corresponding area has been cleared.

7. The safety interlock device in a radiation workplace according to claim 1, characterized in that: The clearing control box is provided with a clearing control box lock for prohibiting non-operating personnel from opening the clearing control box.

8. The safety interlock device in a radiation workplace according to claim 1, characterized in that: The clearing control box is provided with a clearing control box handle for facilitating maintenance personnel to open the clearing control box during maintenance.

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