Device for detecting attenuation performance of gamma-ray protection material

Abstract

The invention discloses a gamma-ray protection material attenuation performance detection device, and relates to the technical field of material attenuation performance detection. The gamma-ray protection material attenuation performance detection device comprises a bottom-layer support, a moving table, a sample table, a right mounting rack, a left mounting rack and an ionization chamber, wherein the right mounting rack and the left mounting rack are used for fixing a wire harness diaphragm; the left mounting frame is provided with a switching assembly for switching detection modes, a conversion assembly for ensuring authenticity of test conditions and a positioning assembly for assisting operation of the conversion assembly, and the switching assembly comprises a diaphragm plate which is located at the left mounting frame and used for changing the diameter of a light beam irradiated on the sample table according to detection requirements; the gear ring and the side wall of the outer ring are fixed with one end of the diaphragm plate, so that three-dimensional automatic positioning of the sample is realized, manual adjustment errors are eliminated, overall and local performance data of the sample in various radiation fields are output at one time, the detection efficiency is greatly improved, and a powerful experimental tool is provided for research and development of gradient, multi-layer and functional integrated materials.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material attenuation performance detection, in particular to a gamma ray protection material attenuation performance detection device. BACKGROUND

[0002] Gamma rays are high-energy electromagnetic radiation released during the decay process of atomic nuclei or subatomic particles. Due to its extremely high energy, gamma rays have strong penetrating power and can penetrate most materials. Gamma rays usually have a wavelength of less than 0.1 nanometers, which is the shortest wavelength in the electromagnetic spectrum. In 1900, French physicist Paul Villard first observed a new type of radiation with higher energy than X-rays. He distinguished this radiation from the already discovered alpha and beta rays and named it gamma rays. The gamma ray protection material attenuation performance detection device is a device specially designed to detect the attenuation performance of protective materials.

[0003] The existing protective material attenuation performance detection method generally needs to manually adjust the sample position, and the positioning accuracy is insufficient, so that the existing protective material attenuation performance detection method cannot clearly detect the point position and the data is not accurate enough. Moreover, when switching between different detection modes, it takes a long time to replace the light barrier with different apertures. For example, the X-ray protective material attenuation performance detection device disclosed in the publication number CN111579566B has the problems of insufficient positioning accuracy and long time consumption when switching between different detection modes. Therefore, a gamma ray protection material attenuation performance detection device is proposed. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a gamma ray protection material attenuation performance detection device to solve the problems raised in the background art.

[0005] To achieve the above purpose, the present application is implemented by the following technical scheme: a gamma ray protection material attenuation performance detection device, comprising a bottom support with a Z-axis direction guide rail, a movable platform movably installed on the Z-axis direction guide rail and having a Y-axis direction movement capability, a sample platform installed on the top of the movable platform through an X-axis direction guide rail, a right mounting bracket and a left mounting bracket for fixing the wire harness light barrier, and an ionization chamber, the left mounting bracket is provided with a switching assembly for switching detection mode, a transformation assembly for ensuring the authenticity of test conditions, and a positioning assembly for assisting the operation of the transformation assembly, the switching assembly comprises: A light barrier plate is located at the left mounting bracket, which changes the diameter of the light beam irradiated on the sample platform according to the detection requirement; A gear ring, the outer circle side wall is fixed with one end of the light barrier plate; A gear is engaged on the gear ring to drive the gear ring to rotate and change the position of the light barrier plate at the left mounting bracket.

[0006] Preferably, the switching assembly further comprises: a rotating shaft, one end of which is fixed on the gear; and a switching motor, an output end of which is connected with the other end of the rotating shaft, for driving the gear to rotate.

[0007] Preferably, the switching assembly further comprises: an isolation block, which is slidingly installed in the left mounting frame, one end of which abuts against the diaphragm plate, and which fills the gap between the left mounting frame and the diaphragm plate; a guide column, one end of which is fixed on the left mounting frame; and a sliding rod, one end of which is fixed on the isolation block, which is slidingly sleeved on the guide column, and the other end of which is provided with an inclined slot, which drives the isolation block to move under the action of external force.

[0008] Preferably, the switching assembly further comprises: a pressing plate, which is provided with an inclined block at the bottom, which is matched with the inclined slot, and which moves under the action of external force, and which drives the inclined slot to move through the inclined block; a limiting rod, one end of which is fixed on the left mounting frame, and the other end of which is slidingly arranged in the pressing plate, for limiting the moving direction of the pressing plate; and an auxiliary push rod, an output end of which is fixed on the top of the pressing plate, and the other end of which is fixed on the left mounting frame.

[0009] Preferably, the switching assembly further comprises: an isolation arc plate, which is fixed in the diaphragm plate; a limiting electromagnet, which is installed on the diaphragm plate; a filter plate, which is slidingly installed in the diaphragm plate, and which changes the energy level of incident rays according to detection requirements; and a magnet, which is fixed at the bottom of the filter plate, and which is magnetically matched with the limiting electromagnet after being electrified, for fixing the filter plate after the position is changed.

[0010] Preferably, the switching assembly further comprises: a driving rod, which is slidingly abutted with the magnet, and which drives the magnet to move to the side where the limiting electromagnet is located under the action of external force; a sliding sleeve, one end of which is slidingly arranged in the left mounting frame, and the other end of which is slidingly sleeved on the driving rod; a deformation air bag, one end of which is fixed in the sliding sleeve, and the other end of which is fixed on the driving rod, for changing the length of the driving rod extending out of the sliding sleeve.

[0011] Preferably, the switching assembly further comprises: a storage air bag, which is fixed at the top of the sliding sleeve, and which is communicated with the deformation air bag; a pressing plate, which is fixed at the top of the storage air bag, for driving the storage air bag to move; a lower electromagnet, which is fixed at the top of the pressing plate; and an upper electromagnet, which is located directly above the lower electromagnet, and which is magnetically matched with the lower electromagnet.

[0012] Preferably, the switching assembly further comprises: a limiting column, which is fixed at the bottom of the sliding sleeve, and which is slidingly arranged out of the pressing plate and finally fixed at the bottom of the upper electromagnet; a power rod, one end of which is fixed at the top of the sliding sleeve; and a driving push rod, an output end of which is fixed on the power rod, and the other end of which is fixed on the top of the left mounting frame.

[0013] Preferably, the positioning assembly comprises: an extrusion rod, one end of which is fixed to the side wall of the extrusion plate; a limiting plate, the side wall of which is fixed to the sliding sleeve; and a baffle plate, which is hinged to the limiting plate by a torsional spring and limits the movement distance of the extrusion rod.

[0014] Preferably, the positioning assembly further comprises: a positioning magnet, which is fixed in the baffle plate; a fixed electromagnet, which is installed in the limiting plate above the positioning magnet; and a positioning electromagnet, which is installed in the limiting plate beside the positioning magnet and cooperates with the fixed electromagnet to fix the position of the positioning magnet.

[0015] The application provides a gamma ray protection material attenuation performance detection device. (1) The gamma ray protection material attenuation performance detection device realizes three-dimensional automatic positioning of a sample through a moving table (with a lifting range of ±150 mm) and an electric translation table (with a stroke of ±150 mm), eliminates human adjustment errors, and achieves millimeter-level detection point accuracy. The center of the sample table is fixed at a height from the ground, ensuring the consistency of the ray incidence angle (0.5° collimation), and the device has multiple safety interlocking mechanisms, including power failure protection, intelligent circuit breaker seamless switching to UPS power supply, and automatic closing of the radiation port by the electric push rod; door-source linkage, real-time control of the output device and the lead box radiation port to forcibly close when the protective door is opened; emergency stop in series, emergency stop button, door travel switch, and control box in series, which immediately closes the gate and cuts off the ray output upon any trigger; remote monitoring and operation, control box integrated with status indicator lights (such as "output device working" red light), and camera for real-time feedback of the aperture state; all cables are connected through aviation plug standardization to reduce the risk of wiring errors.

[0016] (2) The gamma ray protection material attenuation performance detection device can be remotely controlled and switched through software to realize an automatic measurement process, output overall and local performance data of the sample under multiple radiation fields at one time, greatly improve detection efficiency, provide a powerful experimental tool for the research and development of gradient, multi-layer, and functionally integrated materials, ensure the geometric position of the diaphragm plate to be highly repeatable and stable after each switch, and provide a mechanical basis for high-precision and repeatable measurement. The rotating wheel is responsible for switching, and the isolation block is responsible for precise positioning and locking. This "motion-position separation" design can effectively prolong the service life of the core motion components and improve the long-term reliability of the entire device.

[0017] (3) The gamma ray protection material attenuation performance detection device, for different layers of gradient material, respectively applies the ray quality representing the designed protection energy area (such as low-energy filter for the bottom layer and high-energy filter for the top layer), and accurately measures the performance of each layer by using a small beam spot, verifies whether the design meets the standard, systematically changes the effective energy (HVL, TVL) of the incident ray, thereby simulating various situations from soft X-ray to high-energy gamma ray, realizes high-throughput, multi-parameter material screening: detailed performance data of the material in a wide energy spectrum range can be obtained in a short time, the energy spectrum dependence of the material is revealed: it is clear whether the new material is "wide spectrum general type" or "specific energy area optimization type", supports complex material design verification: provides a powerful experimental tool for the research and development of gradient, multi-layer and function integrated materials.

[0018] (4) The gamma ray protection material attenuation performance detection device, by more accurate control of the inflation degree of the deformation air bag, accurately drives the required increased filter plate thickness, thereby ensuring the consistency of the measurement conditions of different batches and different times, which is the basis of data comparability, when the system appears abnormal such as switching failure, the accurate position and counting information provided by the positioning assembly can help quickly diagnose the problem, and significantly improve the accuracy, safety and efficiency of the measurement.

[0019] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the application. The objects and other advantages of the present application can be achieved and obtained by the structure particularly pointed out in the written description and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is another view of the overall structure of the present application; Figure 3 It is a side view of the structure of the mobile station of the present application; Figure 4 It is a position structure diagram of the diaphragm plate of the present application; Figure 5 It is a top view of the structure of the left mounting bracket of the present application; Figure 6 It is a sectional view of the left mounting bracket of the present application; Figure 7 It is a position structure diagram of the switching motor of the present application; Figure 8 It is a position structure diagram of the auxiliary push rod of the present application; Figure 9 It is a combined state diagram of the lower pressing plate of the present application; Figure 10 It is an exploded state diagram of the lower pressing plate of the present application; Figure 11 Assembled state schematic view of the isolation arc plate of the present application; Figure 12 Exploded state schematic view of the isolation arc plate of the present application; Figure 13 Positional structure view of the power rod of the present application; Figure 14 Assembled state schematic view of the limiting plate of the present application; Figure 15 Side sectional view of the sliding sleeve of the present application; Figure 16 Exploded state schematic view of the push rod of the present application; Figure 17 Positional structure view of the baffle of the present application.

[0021] In the figure: 1, bottom support; 11, moving table; 12, sample table; 13, right mounting bracket; 14, ionization chamber; 15, left mounting bracket; 2, switching motor; 21, rotating shaft; 22, gear; 23, gear ring; 24, support rod; 25, diaphragm plate; 26, isolation block; 27, guide column; 28, sliding rod; 29, pressing plate; 210, limiting rod; 211, auxiliary push rod; 3, isolation arc plate; 31, limiting electromagnet; 32, filter plate; 301, magnet; 33, push rod; 34, sliding sleeve; 35, deformation air bag; 36, gas storage bag; 37, extrusion plate; 38, lower electromagnet; 39, upper electromagnet; 310, limiting column; 311, power rod; 312, driving push rod; 4, extrusion rod; 41, limiting plate; 42, baffle; 43, positioning magnet; 44, fixed electromagnet; 45, positioning electromagnet. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0023] In the embodiments of the present application, the devices or elements impliedly indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. In the description of the embodiments of the present application, the meaning of “multiple” is two or more than two, unless otherwise specified precisely and specifically.

[0024] Please refer to Figures 1-2 The present application provides the following technical solutions: Embodiment one: a kind of gamma ray protection material attenuation performance detection device, the top of bottom layer support 1 is fixedly installed a Z-axis direction guide rail, mobile station 11 can be movably installed on Z-axis direction guide rail and have Y-axis direction moving ability, the top of mobile station 11 is fixedly installed an X-axis direction guide rail, sample table 12 can be movably installed on X-axis direction guide rail for placing the sample to be detected, right mounting bracket 13 and left mounting bracket 15 for fixing wire bundle diaphragm and ionization chamber 14 located right side of right mounting bracket 13.

[0025] When using, first, the sample to be measured is placed on the sample table 12 on the top of the mobile station 11, and the mobile station 11 is driven by the control system along the guide rail on the bottom layer support 1 in the Z-axis direction according to the preset coordinates, the height of the mobile station 11 is changed to move in the Y-axis direction, and the sample table 12 is driven to move in the X direction along the guide rail on the top of the mobile station, so as to adjust the position of the sample, and the detection point is aligned with the center of the ray path with an error of ≤±0.5mm.

[0026] Subsequently, the ray output control phase is entered: Safety verification: after detecting that the protection door is closed, the emergency stop circuit is not triggered, and the system power supply is normal, the radioactive source is allowed to be turned on.

[0027] Collimation adjustment: the motor of the control box drive output is driven, the inner layer radiation port is rotated through the gear bearing to the opening position 90° limit switch to trigger stop; the lead box outlet is opened synchronously to form a gamma ray beam.

[0028] Finally, the attenuation performance detection phase is entered: After the gamma rays penetrate the sample, the intensity data after attenuation is collected by the ionization chamber 14; the beam-limiting diaphragm constrains the diameter of the ray beam to be 20mm at 0.5m, ensuring the consistency of the detection area, and the beam-limiting diaphragm is installed on the right mounting bracket 13 and the left mounting bracket 15 respectively.

[0029] Emergency shutdown mode in special circumstances: When any emergency stop button is pressed, the protection door is opened or powered off, the controller immediately outputs a signal: the electric push rod drives the output to reset to the 0° position limit switch to trigger; the lead box outlet is closed to maintain safety logic power supply until the action is completed.

[0030] Please refer to Figures 3-10 The present application provides the following technical solutions: The embodiment two is different from the technical scheme of the embodiment one, and includes that the left mounting frame 15 is provided with a switching assembly for switching detection modes, the switching assembly includes that the output end of a switching motor 2 is fixedly connected with the other end of a rotating shaft 21, the switching motor 2 is used for driving a gear 22 to rotate, one end of the rotating shaft 21 is fixedly installed on the gear 22, the gear 22 is engaged on a tooth ring 23, the tooth ring 23 is driven to rotate to change the position of an aperture plate 25 at the left mounting frame 15, the outer circle sidewall of the tooth ring 23 is fixedly connected with one end of the aperture plate 25, one end of a supporting rod 24 is slidably arranged in the tooth ring 23, the other end of the supporting rod 24 is fixedly installed on the left mounting frame 15, the tooth ring 23 is guided and limited, the aperture plate 25 is located at the left mounting frame 15, the diameter of a light beam irradiated on the sample table 12 is changed according to detection requirements, an isolation block 26 is slidably installed in the left mounting frame 15, one end of the isolation block 26 abuts against the aperture plate 25, the isolation block 26 is used for filling the gap between the left mounting frame 15 and the aperture plate 25, one end of a guide column 27 is fixedly installed on the left mounting frame 15, one end of a sliding rod 28 is fixedly installed on the isolation block 26, the sliding rod 28 is slidably arranged on the guide column 27, the other end of the sliding rod 28 is provided with an inclined groove, the sliding rod 28 can drive the isolation block 26 to move under the action of an external force, a reset spring is further arranged between the sliding rod 28 and the inner wall of the left mounting frame 15, and the reset spring is used for driving the sliding rod 28 to reset to an initial position under the action of no external force, the bottom of a pressing plate 29 is provided with an inclined block matched with the inclined groove, the pressing plate 29 moves under the action of an external force, the inclined block pushes the inclined groove to move, one end of a limiting rod 210 is fixedly installed on the left mounting frame 15, the other end of the limiting rod 210 is slidably arranged in the pressing plate 29, and the limiting rod 210 is used for limiting the moving direction of the pressing plate 29, the output end of an auxiliary push rod 211 is fixedly installed on the top of the pressing plate 29, and the other end of the auxiliary push rod 211 is fixedly installed on the left mounting frame 15.

[0031] In use, when it is needed to use a large beam spot to measure the average attenuation performance of the whole region of a sample, the switching motor 2 is started by the control console, the rotating shaft 21 is driven to rotate by the switching motor 2, the gear 22 is driven to rotate by the rotating shaft 21, the supporting rod 24 can guide and limit the tooth ring 23 by the meshing of the gear 22 and the tooth ring 23 and the sliding cooperation between the tooth ring 23 and the supporting rod 24, the tooth ring 23 can be driven to rotate by the gear 22, the aperture plate 25 is driven to rotate by the tooth ring 23, the required large-aperture aperture plate 25 is rotated to the left mounting frame 15, and the switching motor 2 is stopped. Subsequently, the auxiliary push rod 211 is started by the console control, the lower pressing plate 29 is moved by the auxiliary push rod 211, the lower pressing plate 29 is guided and limited by the limiting rod 210 through the sliding fit between the lower pressing plate 29 and the limiting rod 210, so that the lower pressing plate 29 can only move linearly, the inclined groove on the sliding rod 28 is extruded by the inclined block at the bottom of the lower pressing plate 29, the sliding rod 28 is guided and limited by the guide column 27 through the sliding fit between the guide column 27 and the sliding rod 28, so that the sliding rod 28 can only move linearly along the guide column 27 under the extrusion of the lower pressing plate 29, the isolation block 26 is moved by the sliding rod 28, so that the isolation block 26 shields the gap between the left mounting frame 15 and the diaphragm plate 25, and unintended leakage of the rays is avoided; The isolation block 26 is arranged in a zigzag manner on the side close to the diaphragm plate 25, so that the friction between the isolation block 26 and the diaphragm plate 25 is increased, and further, the zigzag surface matched with the isolation block 26 can also be additionally arranged on the surface of the diaphragm plate 25, so that the zigzag surfaces on the isolation block 26 and the diaphragm plate 25 are clamped with each other, the gap between the left mounting frame 15 and the diaphragm plate 25 is shielded, and the position of the diaphragm plate 25 is fixed, so that the displacement of the diaphragm plate 25 during detection does not cause deviation of the position of the ray irradiation. When the use of the current aperture diaphragm plate 25 is completed and the aperture diaphragm plate 25 of the next aperture needs to be switched, the auxiliary push rod 211 is moved upward by the console control, so that the auxiliary push rod 211 no longer provides the downward pressure to the sliding rod 28 through the lower pressing plate 29, at this time, the sliding rod 28 can drive the isolation block 26 to reset to the left mounting frame 15 under the action of the reset spring, and after resetting, the aperture diaphragm plate 25 of another aperture can be switched by controlling the switching motor 2 to be started again, so that different mode detection operations can be performed.

[0032] Please refer to Figures 11-16 The application provides the following technical solutions: In this embodiment, the technical solutions of the embodiment two are different, and the left mounting frame 15 is provided with a transformation assembly for ensuring the authenticity of the test conditions, and the transformation assembly comprises: The isolation arc plate 3 is fixedly installed in the diaphragm plate 25, the limiting electromagnet 31 is fixedly installed on the diaphragm plate 25, and the filter plate 32 is slidably installed in the diaphragm plate 25. According to the detection requirement, the energy of the incident ray is changed, the bottom of the magnet 301 is fixedly installed on the top of the filter plate 32, the magnet 301 is magnetically matched with the limiting electromagnet 31 after being electrified, the filter plate 32 after being fixedly changed is transformed, the sliding rod 33 is slidably connected with the magnet 301, the magnet 301 is driven to move to the side where the limiting electromagnet 31 is located under the action of external force, one end of the sliding sleeve 34 is slidably arranged in the left mounting frame 15, the other end of the sliding sleeve 34 is slidably arranged outside the sliding rod 33, one end of the deformation air bag 35 is fixedly installed in the sliding sleeve 34, the other end of the deformation air bag 35 is fixedly installed on the sliding rod 33, the deformation air bag 35 is used for changing the length of the sliding rod 33 extending out of the sliding sleeve 34, the bottom of the storage air bag 36 is fixedly installed on the top of the sliding sleeve 34, the storage air bag 36 is communicated with the deformation air bag 35, the bottom of the extrusion plate 37 is fixedly installed on the top of the storage air bag 36, the extrusion plate 37 is used for driving the storage air bag 36 to move, the bottom of the lower electromagnet 38 is fixedly installed on the top of the extrusion plate 37, the upper electromagnet 39 is located directly above the lower electromagnet 38 and is magnetically matched with the lower electromagnet 38, the bottom of the limiting column 310 is fixedly installed on the top of the sliding sleeve 34, the top of the limiting column 310 is slidably arranged in the extrusion plate 37 and is finally fixedly installed on the bottom of the upper electromagnet 39, one end of the power rod 311 is fixedly installed on the top of the sliding sleeve 34, the output end of the driving push rod 312 is fixedly installed on the power rod 311, and the other end of the driving push rod 312 is fixedly installed on the top of the left mounting frame 15.

[0033] In use, in the process of detecting by using different aperture diaphragm plates 25, the local protection performance of the verification component under different equipment, different radiation source beams and different actual use conditions needs to be verified, and the attenuation under different energies needs to be measured; At this time, the upper electromagnet 39 and the lower electromagnet 38 are controlled to be magnetically repelled after being electrified, the lower electromagnet 38 is driven to move downwards under the action of repulsion, the extrusion plate 37 is driven to move by the lower electromagnet 38, the extrusion plate 37 is slidably matched with the limiting column 310, the limiting column 310 guides and limits the extrusion plate 37, the extrusion plate 37 can only move up and down along the limiting column 310, the storage air bag 36 is pressed downwards by the extrusion plate 37, the gas in the storage air bag 36 is transported to the deformation air bag 35 through the gas conveying pipe, the deformation air bag 35 is inflated, the deformation air bag 35 is extruded after being inflated, the sliding rod 33 is extended out of the sliding sleeve 34, and the sliding rod 33 is elongated to different lengths according to the required filter thickness, so that different numbers of magnets 301 and filter plates 32 can be driven to move; After the toggle lever 33 is extended to the desired length from the sliding sleeve 34, the drive push rod 312 is started by the control console control, the power lever 311 is moved by the drive push rod 312, the sliding sleeve 34 is moved by the power lever 311, the toggle lever 33 is moved by the sliding sleeve 34, the magnet 301 is moved by the toggle lever 33, the filter plate 32 is moved by the magnet 301, the filter plate 32 is slidably connected with the diaphragm plate 25, so that the filter plate 32 can only move linearly in the diaphragm plate 25, until the magnet 301 abuts against the limiting electromagnet 31, at this time the limiting electromagnet 31 is energized, so that the limiting electromagnet 31 and the magnet 301 are magnetically attracted together, thereby enabling the filter plate 32 to be kept at the position, at this time the control console controls the drive push rod 312 to drive the sliding sleeve 34 to reset to the initial position shown in the figure again, waiting for the next adjustment. Figure 8 Further, the material of the filter plate 32 on each diaphragm plate 25 can be changed, thereby simulating different radiation conditions, such as a diagnostic X-ray machine: using aluminum Al filters of different thicknesses to "harden" the ray beam to filter out low-energy components, forming standard RQR or DQA ray qualities; CT equipment: using copper Cu filters; Nuclear medicine such as Tc-99m: energy fixed at 140keV, only thin Al filter low-energy tail.

[0034] In another embodiment different from the foregoing embodiments, the toggle lever 33 is also replaced with an electromagnet, so that when the filter thickness needs to be switched, the toggle lever 33 is energized to make the toggle lever 33 and the magnet 301 magnetically together, after the magnet 301 and the limiting electromagnet 31 are magnetically attracted together, the toggle lever 33 is de-energized, when the filter thickness needs to be changed to the initial state, the toggle lever is energized to drive the magnet 301 and the filter plate 32 to reset to the initial position.

[0035] Please refer to Figure 16 、 Figure 17 , the present application provides the following technical solutions: Embodiment four, the technical solutions of the embodiment different from the foregoing embodiments include: the left mounting frame 15 is provided with a positioning assembly for assisting the operation of the conversion assembly, the positioning assembly includes: One end of the pressing lever 4 is fixedly installed on the side wall of the pressing plate 37, the side wall of the limiting plate 41 is fixedly installed on the sliding sleeve 34, one end of the baffle 42 is hingedly connected to the limiting plate 41 through a torsion spring, the baffle 42 is used to limit the movement distance of the pressing lever 4, the positioning magnet 43 is fixedly installed in the baffle 42, the fixed electromagnet 44 is fixedly installed in the limiting plate 41 and located above the positioning magnet 43, the positioning electromagnet 45 is fixedly installed in the limiting plate 41 and located beside the positioning magnet 43, the positioning electromagnet 45 cooperates with the fixed electromagnet 44, thereby fixing the position of the positioning magnet 43. ​

[0036] In use, during the switching of different thickness filter sheets, according to the number of filter plates 32 to be driven, the console controls the energization and de-energization of the fixed electromagnet 44 or the positioning electromagnet 45; When only one filter plate 32 needs to be driven Figure 17 The uppermost fixed electromagnet 44 is energized, so that the magnetic attraction between the fixed electromagnet 44 and the positioning magnet 43 is generated, at the same time, the repulsion between the lower electromagnet 38 and the upper electromagnet 39 is generated, so that the squeezing plate 37 synchronously drives the squeezing rod 4 to move, the squeezing rod 4 is tightly pressed against the uppermost baffle 42, at this time, the storage air bag 36 is squeezed to make the deformation air bag 35 expand, and then the toggle lever 33 is only driven to extend 1.5 cm out of the sliding sleeve 34, at this time, only one filter plate 32 can be driven to move; When two filter plates 32 need to be driven Figure 17 The uppermost fixed electromagnet 44 and the positioning electromagnet 45 are energized, so that the magnetic repulsion between the fixed electromagnet 44 and the positioning magnet 43 is generated, and the magnetic attraction between the positioning electromagnet 45 and the positioning magnet 43 is generated, so that the squeezing rod 4 can pass through the upper baffle 42 and be tightly pressed against the top of the lower baffle 42 under the driving of the squeezing plate 37, at this time, the movement distance of the squeezing plate 37 can squeeze the air outlet of the storage air bag 36, which is just enough to make the deformation air bag 35 expand to squeeze the toggle lever 33 out of the sliding sleeve 34 by 2 cm, at this time, two filter plates 32 can be driven; When three filter plates 32 need to be driven, the fixed electromagnet 44 and the positioning electromagnet 45 on the limiting plate 41 are energized, so that the squeezing rod 4 can move to the lowest point with the squeezing plate 37, so that the deformation air bag 35 expands to the maximum, the toggle lever 33 is squeezed out of the sliding sleeve 34 by 2.5 cm, thereby driving three filter plates 32 to move synchronously; After the detection is completed, the limiting electromagnet 31 is de-energized, and all the magnets 301 and the filter plates 32 are reset to the initial position shown in Figure 11 by the toggle lever 33, the sliding sleeve 34, the power rod 311, and the driving push rod 312, waiting for the next switching of the filter thickness, at the same time, after the squeezing rod 4 is reset to the position shown in Figure 14 the positioning electromagnet 45 is de-energized and the fixed electromagnet 44 is energized, so that the magnetic attraction between the fixed electromagnet 44 and the positioning magnet 43 is generated, at this time, the baffle 42 is reset to the position shown in Figure 17 under the combined action of the torsional spring and the magnetic attraction, and is kept, waiting for the next use.

[0037] Meanwhile, the contents not described in detail in the specification all belong to the prior art known to those skilled in the art.

[0038] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and illustrative figures, it should be apparent that the scope of the present application is not limited to these specific embodiments.

[0039] While the embodiments of the application have been shown and described herein, it will be understood by those skilled in the art that many changes, modifications, substitutions and alterations to these embodiments can be made without departing from the principles and spirits of the application, and it is intended that the scope of the application be limited solely by the scope of the appended claims and the equivalents thereof.

Claims

1. A device for testing the attenuation performance of gamma-ray shielding materials, comprising a bottom support (1) with a Z-axis guide rail, a movable stage (11) movably mounted on the Z-axis guide rail and capable of moving in the Y-axis direction, a sample stage (12) mounted on top of the movable stage (11) via an X-axis guide rail, a right mounting bracket (13) and a left mounting bracket (15) for fixing the beam aperture, and an ionization chamber (14), characterized in that: The left mounting bracket (15) is provided with a switching component for switching detection modes, a transformation component to ensure the authenticity of test conditions, and a positioning component to assist the operation of the transformation component. The switching component includes: The aperture plate (25) is located at the left mounting bracket (15) and changes the diameter of the beam illuminating the sample stage (12) according to the detection requirements; The toothed ring (23) has its outer sidewall fixed to one end of the aperture plate (25); The gear (22) meshes with the gear ring (23) and drives the gear ring (23) to rotate, changing the position of the aperture plate (25) at the left mounting bracket (15).

2. The gamma-ray shielding material attenuation performance testing device according to claim 1, characterized in that: The switching component also includes: The rotating shaft (21) is fixed at one end to the gear (22); Switch the motor (2), and connect the output end to the other end of the rotating shaft (21) to drive the gear (22) to rotate.

3. The gamma-ray shielding material attenuation performance testing device according to claim 1, characterized in that: The switching component also includes: The isolation block (26) is slidably installed in the left mounting bracket (15), with one end pressed against the aperture plate (25), filling the gap between the left mounting bracket (15) and the aperture plate (25); The guide post (27) is fixed at one end to the left mounting bracket (15); The sliding rod (28) is fixed at one end to the isolation block (26) and slidably sleeved outside the guide post (27). The other end has an inclined groove, which drives the isolation block (26) to move under the action of external force.

4. The gamma-ray shielding material attenuation performance testing device according to claim 3, characterized in that: The switching component also includes: The lower pressure plate (29) has an inclined block at the bottom that is adapted to the inclined groove. It moves under the action of external force and pushes the inclined groove to move through the inclined block. The limiting rod (210) is fixed at one end to the left mounting bracket (15) and the other end slides through the lower pressure plate (29) to limit the movement direction of the lower pressure plate (29); The auxiliary push rod (211) has its output end fixed to the top of the lower pressure plate (29) and its other end fixed to the left mounting bracket (15).

5. The gamma-ray shielding material attenuation performance testing device according to claim 1, characterized in that: The transformation component includes: An isolation arc plate (3) is fixed inside the aperture plate (25); A limiting electromagnet (31) is installed on the aperture plate (25); The filter plate (32) is slidably installed inside the aperture plate (25) to change the energy level of the incident rays according to the detection requirements; The magnet (301) is fixed at the top of the filter plate (32) and magnetically engages with the energized limiting electromagnet (31) to fix the filter plate (32) after its position is changed.

6. The gamma-ray shielding material attenuation performance testing device according to claim 5, characterized in that: The transformation component also includes: The lever (33) slides against the magnet (301) and drives the magnet (301) to move towards the side where the limiting electromagnet (31) is located under the action of external force; The sliding sleeve (34) has one end slidably inserted inside the left mounting bracket (15) and the other end slidably inserted outside the lever (33); The deformable airbag (35) is fixed at one end inside the sliding sleeve (34) and at the other end on the actuating rod (33), changing the amount by which the actuating rod (33) extends out of the sliding sleeve (34).

7. The gamma-ray shielding material attenuation performance testing device according to claim 6, characterized in that: The transformation component also includes: The storage airbag (36) is fixed at the top of the sliding sleeve (34) and communicates with the deformation airbag (35); The compression plate (37) is fixed at the bottom to the top of the air storage bag (36), which drives the air storage bag (36) to move. The lower electromagnet (38) is fixed at the top of the extrusion plate (37); The upper electromagnet (39) is located directly above the lower electromagnet (38) and is magnetically coupled with the lower electromagnet (38).

8. The gamma-ray shielding material attenuation performance testing device according to claim 7, characterized in that: The transformation component also includes: The limiting post (310) is fixed at the bottom of the sliding sleeve (34) and slides out of the extrusion plate (37) and is finally fixed at the bottom of the upper electromagnet (39); The power rod (311) is fixed at one end to the top of the sliding sleeve (34); The drive push rod (312) has its output end fixed to the power rod (311) and its other end fixed to the top of the left mounting bracket (15).

9. The gamma-ray shielding material attenuation performance testing device according to claim 7, characterized in that: The positioning component includes: The extrusion rod (4) is fixed at one end to the side wall of the extrusion plate (37); The limiting plate (41) has its sidewalls fixed to the sliding sleeve (34); The baffle (42) is hinged to the limiting plate (41) by a torsion spring, which limits the movement distance of the squeezing rod (4).

10. The gamma-ray shielding material attenuation performance testing device according to claim 9, characterized in that: The positioning component also includes: Positioning magnet (43) is fixed inside baffle (42); A fixed electromagnet (44) is installed in the limiting plate (41) and located above the positioning magnet (43); A positioning electromagnet (45) is installed in a limiting plate (41) and located to the side of the positioning magnet (43), cooperating with a fixing electromagnet (44) to limit the position of the positioning magnet (43).

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