A radiation monitoring device

Abstract

This invention relates to the field of radiation monitoring technology, and more particularly to a radiation monitoring device. The technical solution includes: a detection mounting cavity formed inside a housing, the detection mounting cavity having a radiation entry window; a rotating shielding assembly disposed between the radiation entry window and the detection mounting cavity; the rotating shielding assembly including a shielding disk and a rotating shaft; the shielding disk being rotatably connected to the housing via the rotating shaft; functional areas spaced circumferentially on the shielding disk; a detection channel disposed at the rear end of the rotating shielding assembly; the front end of the detection channel communicating with the detection mounting cavity and facing the shielding disk; and a mounting chamber for installing a sensor disposed at the rear end of the detection channel; the shielding disk rotating selectively aligns different functional areas with the detection channel. This invention has a simple structure, enables rapid switching of radiation entry modes, and possesses good protective performance and detection stability, thus having high practical value.

Description

Technical Field

[0001] This invention relates to the field of radiation monitoring technology, and in particular to a radiation monitoring device. Background Technology

[0002] Radiation monitoring devices are equipment used to detect the intensity of radioactive radiation in the environment. They are widely used in nuclear power plants, radiological medical facilities, industrial flaw detection, and nuclear safety monitoring. Radiation monitoring devices typically use sensors to detect radiation such as gamma rays, beta rays, or X-rays in the environment, and use the detection results for environmental radiation level assessment or radiation safety monitoring.

[0003] Most existing radiation monitoring devices have radiation entry windows directly installed on the casing, allowing external radiation to directly enter the detection area and be detected by the sensor. However, in practical applications, different scenarios have different requirements for radiation monitoring. For example, in high-radiation environments, it is necessary to reduce the radiation flux entering the sensor to avoid sensor saturation, while in low-radiation environments, it is necessary to maximize the amount of radiation entering to improve detection sensitivity.

[0004] In existing technologies, if different detection modes are required, it is usually necessary to replace the collimator with a different specification or add a shielding component. This method is not only structurally complex, but also inconvenient to operate in the field and difficult to quickly switch detection modes. In addition, the radiation entry window is exposed to the external environment for a long time and is easily affected by dust, water vapor or pollutants, which affects the stability and service life of the internal structure of the device.

[0005] Therefore, we propose a radiation monitoring device to solve the existing problems. Summary of the Invention

[0006] The purpose of this invention is to address the problems existing in the background art by proposing a radiation monitoring device.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a radiation monitoring device, comprising:

[0008] The housing has a detection mounting cavity formed inside it, and a radiation entry window is provided at the front end of the detection mounting cavity;

[0009] A rotating shielding assembly is disposed between the radiation entry window and the detection mounting cavity. The rotating shielding assembly includes a shielding disk and a rotating shaft, and the shielding disk is rotatably connected to the housing via the rotating shaft.

[0010] The shielding disk is provided with functional areas spaced apart along the circumference, and the functional areas include through-hole areas and shielding areas;

[0011] The detection channel is located at the rear end of the rotating shielding assembly. The front end of the detection channel communicates with the detection mounting cavity and faces the shielding disk. The rear end of the detection channel is provided with a mounting chamber for installing sensors. When the shielding disk rotates, different functional areas are selectively aligned with the detection channel.

[0012] Preferably, the through-hole area includes a fully open window formed by a large-diameter through-hole and a collimating window formed by a small-diameter through-hole, and the shielding area includes a fully shielded area without through-hole structure. The fully open window, the collimating window and the fully shielded area are arranged at intervals along the circumference of the shielding disk.

[0013] Preferably, the outer edge of the shielding disk is provided with positioning grooves spaced apart along the circumference, and the housing is provided with positioning components that cooperate with the positioning grooves.

[0014] Preferably, the positioning component includes a positioning shell installed on the outer wall of the housing, a positioning pin slidably disposed inside the positioning shell, and a spring disposed between the positioning shell and the positioning pin. The spring is used to push the positioning pin to move toward the shielding disk, so that the positioning pin can be embedded in the positioning groove to achieve the angular positioning of the shielding disk.

[0015] Preferably, one end of the rotating shaft is fixedly connected to the shielding disk, and the other end passes through the housing and is connected to an operating knob. Rotating the operating knob drives the shielding disk to rotate.

[0016] Preferably, the housing, the mounting chamber, and the shielding disk are all provided with a shielding material layer.

[0017] Preferably, the detection channel is a cylindrical channel arranged along the front-rear direction of the housing, and the axis of the detection channel is parallel to the axis of the rotating shaft.

[0018] Preferably, a protective window assembly is provided on the outside of the radiation entry window. The protective window assembly includes a transparent protective window and a clamping ring. The transparent protective window is detachably installed on the housing via the clamping ring, and a sealing ring is provided on the contact surface between the transparent protective window and the housing.

[0019] Preferably, the housing is provided with an annular protrusion, and the annular protrusion has mounting holes along its circumferential direction for installation and fixing.

[0020] The detection channel is detachably provided with a filter mounting slot, and a radiation filter is adapted to be installed in the filter mounting slot. The radiation filter is one of a beta-ray filter, an X-ray filter, or a gamma-ray filter.

[0021] Preferably, the housing is provided with an annular mounting groove for mounting the shielding disk, and a dustproof sealing structure is provided between the shielding disk and the annular mounting groove.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] This device has a rotating shielding assembly between the radiation entry window and the detection mounting cavity. By setting through-hole areas and shielding areas on the shielding plate, and selectively aligning different functional areas with the detection channel through the shielding plate, the device can quickly switch the radiation entry mode and adapt to the detection needs under different radiation intensity environments.

[0024] By setting a fully open window, a collimation window, and a fully shielded area on the shielding disk, the device can achieve multiple working states such as high-sensitivity detection, collimation detection, and radiation shielding, thereby improving the applicability and detection flexibility of the radiation monitoring device.

[0025] By setting positioning grooves on the outer edge of the shielding disk and cooperating with positioning components for angular positioning, the shielding disk can be stably positioned in different functional areas, thereby ensuring the accuracy and stability when switching between different detection modes;

[0026] By installing a protective window assembly on the outside of the radiation entry window, radiation can enter the device through the transparent protective window, while effectively blocking dust, moisture and pollutants from entering the device, thereby improving the device's environmental adaptability and extending its service life.

[0027] By setting shielding material layers inside the housing, mounting chamber, and shielding disk, the interference of external stray radiation on the sensor can be effectively reduced, thereby improving the accuracy and stability of radiation detection results. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0029] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0030] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0031] Figure 4 This is a cross-sectional view of the positioning component of the present invention;

[0032] Figure 5 This is a schematic diagram of the shielding disk structure of the present invention.

[0033] Figure label:

[0034] 1. Housing; 2. Mounting hole; 3. Mounting chamber; 4. Positioning assembly; 401. Positioning shell; 402. Spring; 403. Positioning pin; 5. Protective window assembly; 501. Transparent protective window; 502. Compression ring; 6. Detection channel; 7. Shielding disc; 701. Fully shielded area; 702. Collimation window; 703. Fully open window; 704. Rotating shaft; 705. Positioning groove; 8. Radiation entry window. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] like Figures 1-5 As shown, the radiation monitoring device proposed in this invention includes a housing 1, with a detection mounting cavity formed inside the housing 1. A radiation entry window 8 is provided at the front end of the housing 1, through which radiation enters the detection mounting cavity. A rotating shielding assembly is provided between the radiation entry window 8 and the detection mounting cavity.

[0037] The rotating shielding assembly includes a shielding disk 7 and a rotating shaft 704. The shielding disk 7 is rotatably connected to the housing 1 via the rotating shaft 704. Functional areas are spaced along the circumference of the shielding disk 7. The functional areas include through-hole areas and shielding areas. A detection channel 6 is provided at the rear end of the rotating shielding assembly. The front end of the detection channel 6 communicates with the detection mounting cavity and faces the shielding disk 7. A mounting chamber 3 for mounting sensors is provided at the rear end of the detection channel 6. By rotating the shielding disk 7, different functional areas can be selectively aligned with the detection channel 6, thereby realizing the switching of different radiation measurement modes.

[0038] The functional areas on the shielding disk 7 are further configured as follows: the through-hole area includes a fully open window 703 formed by a large-diameter through-hole and a collimation window 702 formed by a small-diameter through-hole; the shielding area includes a fully shielded area 701 without through-hole structure; the fully open window 703, the collimation window 702 and the fully shielded area 701 are arranged at intervals along the circumference of the shielding disk 7.

[0039] When the fully open window 703 is rotated to align with the detection channel 6, radiation enters the detection channel 6 through the large-diameter through-hole. At this time, the sensor can receive a strong radiation signal, which is suitable for high-sensitivity measurement or background measurement. When the collimating window 702 is rotated to the aligned position, radiation enters only through the small-diameter through-hole, forming a collimated beam, which is suitable for directional measurement or measurement requiring spatial resolution. When the fully shielded area 701 is rotated to align with the detection channel 6, the radiation is shielded, and background measurement or zero-point calibration can be performed.

[0040] To ensure accurate positioning of the shielding disk 7 when it rotates to a specific position, the outer edge of the shielding disk 7 is provided with positioning grooves 705 distributed circumferentially. The housing 1 is provided with a positioning component 4 that cooperates with the positioning grooves 705. The positioning component 4 includes a positioning shell 401 installed on the outer wall of the housing 1. A positioning pin 403 is slidably disposed in the positioning shell 401. A spring 402 is disposed between the positioning shell 401 and the positioning pin 403. The spring 402 is used to push the positioning pin 403 to move toward the shielding disk 7, so that the positioning pin 403 can be embedded in the positioning grooves 705. When the shielding disk 7 rotates, the positioning pin 403 slides into different positioning grooves 705 under the action of the spring 402, thereby providing a clear sense of positioning and ensuring that the functional area is accurately aligned with the detection channel 6.

[0041] To facilitate manual operation, one end of the rotating shaft 704 is fixedly connected to the shielding disk 7, and the other end passes through the housing 1 and can be connected to the operating knob through a gear transmission structure. By rotating the operating knob, the shielding disk 7 can be rotated to achieve mode switching. An indicator mark can be set on the operating knob to display the current mode.

[0042] To enhance the shielding effect, shielding material layers are provided inside the housing 1, the mounting chamber 3, and the shielding plate 7. The shielding material can be lead, tungsten, or other high-density materials to block unnecessary radiation and improve measurement accuracy.

[0043] The detection channel 6 is a cylindrical channel arranged along the front and rear direction of the housing 1. The axis of the detection channel 6 is parallel to the axis of the rotating shaft 704. This design makes the structure compact and easy to process and assemble.

[0044] A protective window assembly 5 is provided on the outside of the radiation entry window 8. The protective window assembly 5 includes a transparent protective window 501 and a clamping ring 502. The transparent protective window 501 is detachably installed on the housing 1 through the clamping ring 502. A sealing ring is provided on the contact surface between the transparent protective window 501 and the housing 1 to prevent dust and moisture from entering the interior. The transparent protective window 501 can be made of thin quartz glass, which has very little radiation attenuation but can block particulate matter.

[0045] To facilitate the installation of the entire device in the required location, the housing 1 is provided with an annular protrusion, and the annular protrusion has mounting holes 2 along the circumferential direction for installation and fixing. The device can be fixed to the wall, equipment panel or other supporting structure through the mounting holes 2.

[0046] To prevent dust from entering the detection mounting cavity through the rotation gap of the shielding disk 7, an annular mounting groove for mounting the shielding disk 7 is provided inside the housing 1. A dustproof sealing structure is provided between the shielding disk 7 and the annular mounting groove. The dustproof sealing structure can be in the form of a brush, rubber ring, etc., to ensure flexible rotation while effectively blocking external dust.

[0047] The detection channel 6 is detachably equipped with a filter mounting slot, which is fitted with a radiation filter, which can be one of a beta-ray filter, an X-ray filter, or a gamma-ray filter. Radiation is often a mixed radiation field (such as the simultaneous presence of X-rays and gamma rays in nuclear medical facilities, or beta-rays and gamma rays in nuclear waste areas). If the radiation sensor directly detects mixed radiation, signal superposition and data distortion are likely to occur. The radiation filter can filter out interfering radiation other than the monitored target in advance, allowing only the target radiation to enter the detection channel and be detected by the sensor. This effectively avoids stray radiation interfering with the detection results. Combined with the original device's design of "shielding material layer to reduce external stray radiation interference," it forms a dual anti-interference system, further improving detection stability and data accuracy. The filter mounting slot is detachable and compatible with various filters. Operators can operate flexibly according to actual monitoring needs: when there is no need to distinguish radiation type, the filter can be removed, and the device can be restored to the general radiation monitoring mode; when specific detection is required, the corresponding filter (beta / X / γ) can be quickly installed, switching to the specific detection mode. Different types of radiation cause varying degrees of damage to sensors. Some types of radiation (such as high-energy beta rays), if directly exposed to sensors for extended periods, can accelerate sensor aging, reduce detection accuracy, and even cause irreversible damage. Corresponding filters can attenuate or filter out this type of high-loss radiation in advance, allowing only the radiation type compatible with the sensor to enter the detection channel, thus reducing direct radiation damage to the sensor. While the original device can be adapted to different sensors through structural adjustments to the installation chamber, adding filters allows for the compensation of "radiation detection blind spots / sensitivity differences" between different sensors by replacing the filters. For example, some sensors are highly sensitive to gamma rays but susceptible to beta ray interference. After installing a beta ray filter, the sensor can accurately detect gamma rays without needing to replace it with a dedicated sensor, reducing equipment usage and maintenance costs and improving the compatibility and versatility of the sensor and device.

[0048] Working principle:

[0049] During operation, the sensor, such as a scintillator detector, is installed in the installation chamber 3. According to the measurement requirements, the shielding disk 7 is rotated by operating the knob to align the corresponding functional area with the detection channel 6. The positioning component 4 ensures that the position is correct each time it is rotated. The radiation enters the window 8 and the selected functional area through the radiation input window and reaches the sensor through the detection channel 6, thus realizing radiation monitoring.

[0050] The above specific embodiments are merely several preferred embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

[0051] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A radiation monitoring device, characterized in that, include: The housing (1) has a detection mounting cavity inside, and a radiation entry window (8) is provided at the front end of the detection mounting cavity. A rotating shielding assembly is disposed between the radiation entry window (8) and the detection mounting cavity. The rotating shielding assembly includes a shielding disk (7) and a rotating shaft (704). The shielding disk (7) is rotatably connected to the housing (1) through the rotating shaft (704). The shielding disk (7) is provided with functional areas at intervals along the circumference, the functional areas including through-hole areas and shielding areas; The detection channel (6) is located at the rear end of the rotating shielding assembly. The front end of the detection channel (6) is connected to the detection mounting cavity and faces the shielding disk (7). The rear end of the detection channel (6) is provided with a mounting chamber (3) for installing sensors. When the shielding disk (7) rotates, different functional areas are selectively aligned with the detection channel (6).

2. The radiation monitoring device according to claim 1, characterized in that: The through-hole area includes a fully open window (703) formed by a large-diameter through-hole and a collimation window (702) formed by a small-diameter through-hole. The shielding area includes a fully shielded area (701) without through-hole structure. The fully open window (703), the collimation window (702) and the fully shielded area (701) are arranged at circumferential intervals along the shielding disk (7).

3. The radiation monitoring device according to claim 1, characterized in that: The outer edge of the shielding disk (7) is provided with positioning grooves (705) spaced out in the circumferential direction, and the housing (1) is provided with a positioning component (4) that cooperates with the positioning grooves (705).

4. A radiation monitoring device according to claim 3, characterized in that: The positioning component (4) includes a positioning shell (401) installed on the outer wall of the housing (1). A positioning pin (403) is slidably disposed inside the positioning shell (401). A spring (402) is disposed between the positioning shell (401) and the positioning pin (403). The spring (402) is used to push the positioning pin (403) to move toward the shielding disk (7), so that the positioning pin (403) can be embedded in the positioning tooth groove (705) to achieve the angular positioning of the shielding disk (7).

5. A radiation monitoring device according to claim 1, characterized in that: One end of the rotating shaft (704) is fixedly connected to the shielding disk (7), and the other end passes through the housing (1) and is connected to an operating knob. The shielding disk (7) is rotated by rotating the operating knob.

6. A radiation monitoring device according to claim 1, characterized in that: The housing (1), the mounting chamber (3), and the shielding plate (7) are all provided with a shielding material layer.

7. A radiation monitoring device according to claim 1, characterized in that: The detection channel (6) is a cylindrical channel arranged along the front and rear direction of the housing (1), and the axis of the detection channel (6) is parallel to the axis of the rotating shaft (704).

8. A radiation monitoring device according to claim 1, characterized in that: A protective window assembly (5) is provided on the outside of the radiation entry window (8). The protective window assembly (5) includes a transparent protective window (501) and a clamping ring (502). The transparent protective window (501) is detachably installed on the housing (1) through the clamping ring (502). A sealing ring is provided on the contact surface between the transparent protective window (501) and the housing (1). An annular protrusion is provided on the housing (1), and a mounting hole (2) for installation and fixing is provided on the annular protrusion along the circumferential direction.

9. A radiation monitoring device according to claim 8, characterized in that: The detection channel (6) is detachably provided with a filter mounting slot, and a radiation filter is adapted to be installed in the filter mounting slot. The radiation filter is one of a beta-ray filter, an X-ray filter, or a gamma-ray filter.

10. A radiation monitoring device according to claim 1, characterized in that: The housing (1) is provided with an annular mounting groove for installing the shielding disk (7), and a dustproof sealing structure is provided between the shielding disk (7) and the annular mounting groove.

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