Precise fixing device for photoelectric module of access monitoring system in control area of nuclear power plant

Abstract

The utility model relates to an accurate fixing device for a photoelectric module of a nuclear power plant control area access monitoring system, which is used for accurately positioning a personnel, vehicle and equipment photoelectric module of the control area access monitoring system and improving the accuracy of personnel and vehicle radiation monitoring equipment. Comprising a stainless steel support with a semicircular groove, a photoelectric module is arranged in the semicircular groove, a long-strip-shaped hole is formed in the support, and the fixing position of the support is adjusted through a positioning bolt in the hole. And the photoelectric module is fixed with the original photoelectric base of the personnel and vehicle monitor body through the device. The hole and the personnel and vehicle monitor body are locked through a bolt. According to the utility model, the working convenience and the stability / effectiveness of equipment monitoring are ensured in practical application.

Description

Technical Field

[0001] This utility model relates to a precise fixing device for photoelectric modules in a nuclear power plant control area access monitoring system, used for the precise positioning of photoelectric modules of personnel, vehicles and equipment in the control area access monitoring system, thereby improving the accuracy of personnel and vehicle radiation monitoring equipment. Background Technology

[0002] Currently, the photoelectric module precision fixing device of the access control system in the Fuqing site frequently malfunctions, causing numerous problems in on-site operations, such as: low on-site work efficiency; low stability of daily operation measurements; difficult equipment maintenance; and increased radiation dose to personnel. Therefore, a precise fixing device for the photoelectric module of the nuclear power plant control area access control system is needed. This device should address the diverse needs of all stages of normal operation of personnel and vehicle radiation monitoring equipment and personnel / vehicle position sensing devices within the nuclear power plant control area access control system. It should serve the equipment maintenance work of nuclear power plant operation and maintenance personnel, the detection of equipment radiation source efficiency, and parameter verification, making subsequent operation and maintenance activities of the nuclear power plant control area access control system more efficient and accurate. Utility Model Content

[0003] This utility model comprehensively considers installation stability, work efficiency, and equipment maintenance convenience, providing a precise fixing device for photoelectric modules in a nuclear power plant control area access monitoring system. It includes a stable mounting component for the photoelectric module, as well as adjustment devices, forming this precise fixing device. In practical applications, it ensures ease of operation and the stability / effectiveness of equipment monitoring. It solves the following technical problems: Low on-site work efficiency. Without a precise fixing device for photoelectric modules, workers need to constantly adjust the position to begin correct measurements. Furthermore, during measurement, the photoelectric module may deviate from its set position, requiring the test to be restarted, reducing work efficiency; Low stability of daily operation measurements. During daily operation, because personnel, vehicles, and equipment are installed in an open environment, they are constantly affected by high temperatures, rain, and strong winds (the Fuqing Nuclear Power Plant site, the first site of the Hualong One reactor, experiences frequent strong winds), causing the fixing device to rust and deform. This leads to frequent angular deviations of the photoelectric module, preventing it from entering measurement mode when personnel or vehicles pass by, resulting in low equipment measurement reliability / stability; Difficult equipment maintenance. After the adjusting bolts on the upper and lower parts of the fixing device rusted and deformed, they could not be removed from the fixing device, and the entire fixing device had to be replaced. However, the average procurement cycle for spare parts is 5 months, which seriously affects the operation of the pollution monitoring instrument.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A precise fixing device for photoelectric modules in a nuclear power plant control area access monitoring system includes a stainless steel bracket with a semi-circular groove, in which the photoelectric module is placed. The bracket has elongated holes, and the fixing position of the bracket is adjusted by positioning bolts inside the holes.

[0006] The device is made of stainless steel.

[0007] The photoelectric module is fixed to the original photoelectric base of the personnel and vehicle monitoring instrument body through this device.

[0008] The hole is secured to the personnel and vehicle monitoring device body with bolts.

[0009] Use two positioning bolts to fix the lower half of the main body of the fixing device to the mounting bracket of the vehicle pollution monitor at the hole. The fixing position can be adjusted horizontally as needed.

[0010] The photoelectric module is placed in the semi-circular groove, and the upper part of the fixing device is covered. The upper and lower parts of the fixing device are connected by inserting adjusting bolts into the hexagonal bolt holes on both sides of the semi-circular groove.

[0011] By loosening the positioning bolts in the hexagonal bolt holes on both sides of the semi-circular groove, the installation angle of the photoelectric module can be continuously and stably adjusted, so that the photoelectric modules on both sides of the vehicle pollution monitor can be accurately fixed.

[0012] The beneficial effects achieved by this utility model are as follows:

[0013] The personnel and vehicle contamination monitoring system in the controlled area of ​​a nuclear power plant adopts a channel-type installation method. When pedestrians or vehicles pass through the channel, the detector detects them and determines whether they are carrying radioactive materials. When the photoelectric device detects personnel or vehicles passing through, the monitor automatically switches to measurement mode to monitor the passing personnel. When personnel are detected to be contaminated, the monitor automatically issues an audible and visual alarm. When no personnel are passing through, the equipment should conduct dynamic background monitoring. Features of this device: fixed photoelectric module; adjustable height and mobility for quick and accurate location of the radiation source during detector calibration; simple and convenient operation, significantly reducing on-site workload. It improves equipment measurement accuracy and reliability; increases work efficiency, reduces labor costs, and lowers the dose received by personnel; improves equipment maintenance difficulties, reduces the probability of device malfunction, and increases equipment availability. Attached Figure Description

[0014] Figure 1 A front view of a photoelectric module precision fixing device for a nuclear power plant control area access monitoring system;

[0015] Figure 2 A side view of a precise fixing device for photoelectric modules in a nuclear power plant control area access monitoring system.

[0016] Figure 3 A top view of a precise fixing device for photoelectric modules in a nuclear power plant control area access monitoring system.

[0017] Figure 4 The side of the monitoring device mounting bracket;

[0018] In the diagram: Bolt holes 1 and 2 are used to install positioning bolts for fixing the photoelectric module; bolt hole 3 is used to install adjusting bolts to fix this device to the monitoring instrument mounting bracket 5-8; groove 4 is used to install the photoelectric module. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0020] A precise fixing device for photoelectric modules in a nuclear power plant controlled area access monitoring system is disclosed. This device combines a position fixing component that stably mounts the photoelectric module with the original photoelectric base of a personnel and vehicle monitoring instrument. The design incorporates a stainless steel bracket with a semi-circular groove. The photoelectric module is placed within this groove. The bracket has a long, narrow hole, allowing adjustment of the bracket's position via positioning bolts, thus enabling adjustment of the photoelectric module.

[0021] The general usage method and equipment structure are as follows: The photoelectric module is fixed to the original photoelectric base of the personnel and vehicle monitoring instrument body through this device. The elongated hole on the device is locked to the personnel and vehicle monitoring instrument body with bolts. The device is made of stainless steel.

[0022] The installation method is as follows: During installation, use two positioning bolts to fix the lower half of the main body of the device to the mounting bracket of the vehicle pollution monitor at the slotted hole. This fixing position can be adjusted horizontally as needed. Place the photoelectric module in the semi-circular groove, cover it with the upper half of the fixing device, and connect the upper and lower parts of the fixing device by inserting adjusting bolts into the hexagonal bolt holes on both sides of the semi-circular groove. By loosening the positioning bolts in the hexagonal bolt holes on both sides of the semi-circular groove, the installation angle of the photoelectric module can be continuously and stably adjusted, thereby accurately fixing the photoelectric modules on both sides of the vehicle pollution monitor.

[0023] During the installation, commissioning, operation, and maintenance of the personnel and vehicle radioactivity monitoring equipment in the Hualong One control area access system, the placement of the photoelectric module is critical. The photoelectric module must be precisely centered on the receiving module, ensuring complete alignment. When pedestrians or vehicles pass through the passage, the detector can detect their passage, assess their radioactivity, and determine if they are carrying radioactive materials. The monitor automatically switches to measurement mode to monitor the passing personnel. If the photoelectric module is not precisely fixed in place using this device, it may result in: loss of radioactivity level measurement for personnel and vehicles; jamming of the internal bolts of the photoelectric module mounting device; low on-site work efficiency; and increased radiation dose to personnel. Therefore, this device can precisely control the position of the photoelectric module, is easy to operate, and reduces the time personnel are exposed to the radiation source.

[0024] During installation, use two positioning bolts at bolt hole 3 to fix the lower half of the main body of the fixing device to the mounting bracket 5-8 of the vehicle pollution monitor. This fixing position can be adjusted horizontally as needed. Place the photoelectric module in the groove 4, cover it with the upper half of the fixing device, and connect the upper and lower parts of the fixing device with the positioning bolts at bolt holes 1 and 2. By loosening the positioning bolts at bolt holes 1 and 2, the installation angle of the photoelectric module can be continuously and stably adjusted, thereby accurately fixing the photoelectric modules on both sides of the vehicle pollution monitor.

[0025] Located outdoors, this mounting device may experience rust or deformation of the positioning bolts at bolt holes 1 and 2 under conditions of high temperature, strong winds, and rain, causing the photoelectric module to shift position. During routine maintenance, simply replacing the adjusting bolts will restore the normal function of the mounting device; there is no need to replace the entire device.

Claims

1. A precise fixing device for photoelectric modules in a nuclear power plant controlled area access monitoring system, characterized in that: It includes a stainless steel bracket with a semi-circular groove, in which the photoelectric module is placed. The bracket has elongated holes, and the bracket's fixed position can be adjusted by positioning bolts inside the holes.

2. The precise fixing device for photoelectric modules of the nuclear power plant control area access monitoring system according to claim 1, characterized in that: The device is made of stainless steel.

3. The precise fixing device for photoelectric modules of the nuclear power plant control area access monitoring system according to claim 1, characterized in that: The photoelectric module is fixed to the original photoelectric base of the personnel and vehicle monitoring instrument body through this device.

4. The precise fixing device for photoelectric modules of the nuclear power plant control area access monitoring system according to claim 1, characterized in that: The hole is secured to the personnel and vehicle monitoring device body with bolts.

5. The precise fixing device for photoelectric modules of the nuclear power plant control area access monitoring system according to claim 1, characterized in that: Use two positioning bolts to fix the lower half of the main body of the fixing device to the mounting bracket of the vehicle pollution monitor at the hole. The fixing position can be adjusted horizontally as needed.

6. The precise fixing device for photoelectric modules of the nuclear power plant control area access monitoring system according to claim 5, characterized in that: The photoelectric module is placed in the semi-circular groove, and the upper part of the fixing device is covered. The upper and lower parts of the fixing device are connected by inserting adjusting bolts into the hexagonal bolt holes on both sides of the semi-circular groove.

7. The precise fixing device for photoelectric modules of the nuclear power plant control area access monitoring system according to claim 6, characterized in that: By loosening the positioning bolts in the hexagonal bolt holes on both sides of the semi-circular groove, the installation angle of the photoelectric module can be continuously and stably adjusted, so that the photoelectric modules on both sides of the vehicle pollution monitor can be accurately fixed.

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