Slip-on quick-release sample cartridge for neutron testing of powder samples and method of loading the same
Patent Information
- Application Number
- CN202611408046.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-09-11
- Publication Date
- 2026-11-03
AI Technical Summary
In existing neutron scattering experiments, the loading and sealing of sample boxes are inadequate, affecting experimental repeatability and the reliability of results. Problems include long loading and unloading times, low efficiency, high non-sample scattering background, reliance on manual sealing, and uneven powder distribution.
The slide-top quick-release sample box features a labyrinthine design with inner and outer sealing strips, combined with a wedge-shaped clamping part and a compaction column, enabling rapid sample loading and efficient sealing. This avoids powder bridging and local accumulation, ensuring sealing performance and sample uniformity.
It improves the operational efficiency and repeatability of neutron scattering experiments, reduces non-sample scattering background, ensures sealing performance and powder distribution consistency, and enhances the reliability of experimental results.
Smart Images
Figure CN123029063A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of neutron scattering experimental technology, and in particular to a sliding-cover quick-release sample box for neutron testing of powder samples and its sample loading method. Background Technology
[0002] In neutron science research experiments, in order to analyze information such as the crystal structure and magnetic structure of samples, powder samples are usually placed in a low-background sample box designed specifically for low-temperature neutron scattering experiments. The low-background sample box not only provides a sealed space for the powder sample, but also allows neutrons to easily pass through it and irradiate the sample without generating too much stray signal, which makes low-temperature neutron scattering experiments possible and facilitates subsequent data analysis.
[0003] However, currently, commonly used laboratory sample boxes employ methods such as screw clamping, tape sealing, film bag encapsulation, or small-hole filling to load and seal samples. These methods present several problems: First, when sealing sample boxes with screw clamping, multiple screws are required to tighten them circumferentially, which is not only time-consuming and inefficient, but also inevitably introduces metal fasteners such as screws and nuts into or near the neutron beam region, introducing additional non-sample scattering background and reducing the signal-to-noise ratio of experimental data. Second, while tape sealing or film bag encapsulation can avoid introducing metal fasteners, the reliability of the seal depends on the consistency of manual operation. Repeated disassembly and reassembly can easily leave adhesive residue or create wrinkles on the sealing surface, leading to… The existing sample boxes suffer from several problems. First, the sealing effect varies significantly between batches, making it difficult to guarantee experimental repeatability. Second, the sample chambers of existing sample boxes are typically thin (on the order of 1 mm). When filling powder samples using methods such as small-hole filling, the powder is prone to bridging or local accumulation within the chamber. Simply tapping or shaking is insufficient to ensure uniform powder distribution within the thin chamber, leading to inconsistent powder density in different areas of the same sample box and affecting the comparability of experimental results between different batches. Third, existing sample boxes often lack effective isolation design between the powder filling port and the sealing structure. Powder scattered during filling can easily contaminate the sealing surface or sealing ring, further increasing the risk of seal failure and powder leakage. In summary, the existing sample boxes present intertwined problems in terms of operational efficiency, filling uniformity, sealing and leak prevention, and background suppression. Improving only one aspect is insufficient to address all these issues simultaneously, significantly impacting the repeatability of neutron scattering experiments and the reliability of experimental results.
[0004] Therefore, existing technologies still need to be improved and developed. Summary of the Invention
[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a sliding quick-release sample box for neutron testing powder samples and its sample loading method, aiming to solve the problem that the loading and sealing effect of existing sample boxes is insufficient, which affects the repeatability of neutron testing experiments and the reliability of experimental results.
[0006] The technical solution of the present invention is as follows: A sliding-cover quick-release sample box for neutron testing of powder samples, comprising: The box body has a sample cavity for containing powder samples; a guide rail is provided on the top of the box body, and a powder filling port communicating with the sample cavity is provided at the bottom of the guide rail; furthermore, the box body has an inner sealing groove and an outer sealing groove, which are nested around the powder filling port; the box body also has a labyrinth isolation flange, which is located between the inner sealing groove and the outer sealing groove. An inner sealing strip and an outer sealing strip are respectively disposed in the inner sealing groove and the outer sealing groove; when the inner sealing strip and the outer sealing strip are installed in place, the top surface of the labyrinth isolation flange is higher than the top surface of the inner sealing strip and the top surface of the outer sealing strip; A powder-filling funnel can slide along the guide rail to above the powder-filling opening; the powder-filling funnel is provided with a powder-adding channel for connecting with the powder-filling opening; the powder-filling funnel is provided with a protruding shielding part, when the powder-filling funnel is inserted into the guide rail and the powder-adding channel is aligned with the powder-filling opening, the shielding part is directly opposite the labyrinth isolation flange, located above the inner sealing groove and the outer sealing groove, and is used to shield the inner sealing groove and the outer sealing groove; A compaction column, adapted to the powder filling funnel; the compaction column is used to pass through the powder filling channel to the powder filling port and the sample cavity to compact the powder sample in the sample cavity; A sliding cover is detachably connected to the box body; the sliding cover is used to insert into the guide rail to cover the powder filling port; a wedge-shaped pressing part extending along the insertion direction of the sliding cover is provided on the top surface of the sliding cover; a sealing protrusion is provided on the bottom surface of the sliding cover; when the sliding cover slides on the guide rail, the wedge-shaped pressing part abuts against the guide rail, causing the sealing protrusion to press down on the inner sealing strip and the outer sealing strip.
[0007] The sliding-cover quick-release sample box for neutron testing powder samples, wherein the box body further includes: A support frame is provided with a test channel that runs through the front and back; the powder filling port is located above the test channel; on both sides of the support frame, a front mounting groove and a rear mounting groove are respectively provided around the periphery of the test channel. A front sealing frame and a rear sealing frame, wherein the front sealing frame is disposed within the front mounting groove; and the rear sealing frame is disposed within the rear mounting groove. A front window panel and a front pressure frame, wherein the front window panel is disposed on the side of the front sealing frame opposite to the support frame; and the front pressure frame is disposed on the side of the front window panel opposite to the front sealing frame. The rear window plate and the rear pressure frame are provided. The rear window plate is disposed on the side of the rear sealing frame opposite to the support frame. The rear pressure frame is disposed on the side of the rear window plate opposite to the rear sealing frame. The sample cavity is formed between the rear window plate and the front window plate. The front sealing frame is arranged along the edge of the front window plate to seal the assembly gap between the front window plate and the front mounting groove. The rear sealing frame is arranged along the edge of the rear window plate to seal the assembly gap between the rear window plate and the rear mounting groove. Two quick-release clamps are inserted from both sides of the support frame to simultaneously clamp the front pressure frame and the rear pressure frame.
[0008] The sliding quick-release sample box for neutron testing powder samples, wherein a front positioning slot is provided on the outer side of the front mounting groove; a front abutment block and a front positioning block are provided on the side of the front pressure frame facing the front window plate, the front abutment block is used to press against the front window plate, and the front positioning block is engaged with the front positioning slot; and / or, A rear positioning slot is provided on the outer side of the rear mounting groove; a rear abutment block and a rear positioning block are provided on the side of the rear pressure frame facing the rear window panel, the rear abutment block is used to press against the rear window panel, and the rear positioning block is engaged with the rear positioning slot.
[0009] The sliding quick-release sample box for neutron testing powder samples includes a bayonet on the side wall of the support frame; an assembly groove adapted to the support frame on the quick-release clamp; and the quick-release clamp is configured such that when the support frame is laterally inserted into the assembly groove, the side walls on both sides of the assembly groove abut against the front pressure frame and the rear pressure frame, respectively. The assembly channel is provided with an elastic buckle at the position opposite the bayonet, and the elastic buckle is used to lock the quick-release clamp onto the support frame.
[0010] The sliding quick-release sample box for neutron testing powder samples, wherein the front window plate and the rear window plate are any one of aluminum plate, vanadium plate, and zirconium-titanium alloy plate, and both the front window plate and the rear window plate are rolled dense foil with a thickness of 0.3-0.5 mm.
[0011] The sliding-cover quick-release sample box for neutron testing powder samples, wherein the free thickness of the inner sealing strip and the outer sealing strip is 0.6-1.0 mm, and the compression rate is 20%-30%; Both the inner sealing strip and the outer sealing strip are any one of the following: frame ring, O-ring, special-shaped lip ring, and thin sheet gasket; The inner sealing strip and the outer sealing strip are made of different materials or have different hardness.
[0012] The sliding quick-release sample box for neutron testing powder samples has a supporting wall at the edge of the shielding part, which surrounds the outer sealing groove, so that the shielding part is suspended above the inner sealing strip and the outer sealing strip.
[0013] The sliding-cover quick-release sample box for neutron testing powder samples, wherein the compaction column comprises: The compaction handle has a compaction sheet at the lower end and a gripping part at the top end; the compaction sheet is used to be inserted into the powder filling port to compact the powder sample; the cross-sectional area of the gripping part is larger than the cross-sectional area of the compaction sheet, and is used for gripping. A travel limiter engages with the compaction handle; the travel limiter includes a first limiter and a second limiter, the first limiter having a thickness of 0.4 mm and being used to level the powder sample; the second limiter having a thickness of 0.8 mm and being used to lightly press the powder sample.
[0014] The sliding-cover quick-release sample box for neutron testing powder samples is provided with a sliding groove on the guide rail and a positioning port on the side wall of the sliding groove. The sliding cover has an elastic locking protrusion on its side wall; the elastic locking protrusion is used to fit the positioning port.
[0015] This application also discloses a method for loading a sliding-cover quick-release sample box for neutron testing powder samples, applicable to the sliding-cover quick-release sample box for neutron testing powder samples as described in any of the preceding claims; wherein, it includes: Remove the sliding cover and open the powder filling port; Insert the powder funnel into the guide rail until the powder filling channel is aligned with the powder filling port; Weigh the powder sample to be tested quantitatively, divide it into multiple portions, and add it into the powder adding channel one by one until all the powder sample is loaded into the sample cavity; after each addition of powder sample, insert the compaction column and repeatedly level it 1-3 times, with each leveling and pressing time being 2-3 seconds. Remove the compaction column and the powder funnel, and remove any residual powder sample around the powder inlet; then push the sliding cover into the guide rail and lock it to seal the powder inlet; Invert the box for visual inspection and perform a shaking test on the tracer powder. If no powder leakage is confirmed, the sample loading is complete.
[0016] Compared with the prior art, the embodiments of the present invention have the following advantages: This invention discloses a sliding-cover quick-release sample box with a completely sealed box structure, achieving sample loading and sealing solely through the powder filling port. During loading, the sliding cover is first removed and the powder filling funnel is installed, opening the sample chamber and allowing the powder sample to fall smoothly into the chamber along the powder filling channel. Simultaneously, a compaction column applies appropriate pressure to the powder, effectively preventing powder bridging or localized accumulation and significantly improving the filling uniformity within the thin-layer chamber. During filling, the shielding part blocks the inner and outer sealing grooves, preventing powder from falling into them and keeping the top of the box clean. After the sample chamber is filled, the powder filling funnel is removed, and the sliding cover is reinserted along the guide rail to cover the powder filling port. The wedge-shaped clamping part presses the sliding cover against the inner and outer sealing strips, achieving a sealing effect at the powder filling port, thus completing the sealing and closure of the sample chamber.
[0017] The entire sample loading process is simple, quick to assemble and disassemble, and highly efficient. It eliminates the need for additional screws or tape for sealing, ensuring excellent leak-proof performance and preventing non-sample scattering background from extra fasteners entering the neutron beam region. More importantly, the compaction column provides controllable compaction depth and packing density, ensuring high consistency in the loading quality across different batches of samples, thereby effectively improving the repeatability of neutron scattering experiments and the reliability of data results. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of part of the structure of the sliding-cover quick-release sample box for neutron testing powder samples in this invention. Figure 2 for Figure 1 Cross-sectional view along the AA' direction; Figure 3 This is an exploded view of a portion of the structure of the sliding quick-release sample box for neutron testing powder samples in this invention. Figure 4 This is an exploded view of a portion of the sliding quick-release sample box for neutron testing of powder samples in this invention, taken from another angle. Figure 5 This is an exploded view of part of the box body structure and the sliding cover, inner sealing strip, and outer sealing strip in this invention; Figure 6 This is a schematic diagram of part of the structure of the sliding-cover quick-release sample box for neutron testing powder samples in this invention. Figure 7 This is an exploded view of a portion of the structure of the sliding quick-release sample box for neutron testing powder samples in this invention. Figure 8 This is an exploded view of a portion of the sliding quick-release sample box for neutron testing of powder samples in this invention, taken from another angle. Figure 9 This is a flowchart of the sample loading method for the sliding quick-release sample box used for neutron testing powder samples in this invention.
[0020] Among them, 100, box body; 101, sample chamber; 102, guide rail; 1021, positioning port; 103, powder filling port; 104, support frame; 1041, test channel; 1042, front mounting groove; 1043, rear mounting groove; 1044, front positioning slot; 1045, rear positioning slot; 1046, bayonet; 105, front sealing frame; 106, rear sealing frame; 107, front window plate; 108, front pressure frame; 1081, front abutment block; 1082, front positioning block; 109, rear window plate; 110, rear pressure frame; 1101, rear abutment block; 1102, etc. 111. Rear positioning block; 111. Quick-release clamp; 1111. Assembly channel; 1112. Elastic lock; 112. Inner sealing groove; 113. Outer sealing groove; 114. Labyrinth isolation flange; 200. Powder filling funnel; 201. Powder filling channel; 202. Guide part; 203. Connecting part; 204. Shielding part; 300. Compacting column; 301. Compacting handle; 3011. Compacting sheet; 3012. Grip part; 302. Stroke limiter; 400. Sliding cover; 401. Wedge-shaped clamping part; 402. Elastic locking protrusion; 500. Inner sealing strip; 600. Outer sealing strip. Detailed Implementation
[0021] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.
[0022] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the accompanying drawings may occur. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings, but include changes in shape that may occur during manufacturing. The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all contents, operations, or steps, nor do they necessarily need to be performed in the order described. For example, some operations or steps may be broken down, combined, or partially merged, so the actual order of execution may change depending on the specific circumstances.
[0023] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.
[0024] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.
[0025] For ease of description, spatial relational terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relational terms are intended to encompass not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways, and the spatial relational terms used herein will be interpreted accordingly.
[0026] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.
[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown in one embodiment of this invention application, a sliding-cover quick-release sample box for neutron testing powder samples is disclosed, including a box body 100, an inner sealing strip 500, an outer sealing strip 600, a powder funnel 200, a compaction column 300, and a sliding cover 400. The box body 100 is provided with a sample cavity 101 for containing powder samples. A guide rail 102 is provided on the top of the box body 100, and a powder filling port 103 communicating with the sample cavity 101 is provided at the bottom of the guide rail 102. Furthermore, the box body 100 is provided with an inner sealing groove 112 and an outer sealing groove 113, which are nested around the powder filling port 103. The box body 100 is also provided with a labyrinth isolation flange 114, which is located between the inner sealing groove 112 and the outer sealing groove 113. The inner sealing strip 500 and the outer sealing strip 600 are respectively disposed in the inner sealing groove 112 and the outer sealing groove 113; when the inner sealing strip 500 and the outer sealing strip 600 are installed in place, the top surface of the labyrinth isolation flange 114 is higher than the top surface of the inner sealing strip 500 and the top surface of the outer sealing strip 600.
[0028] like Figure 7 and Figure 8 As shown, the powder funnel 200 can slide along the guide rail 102 to above the powder inlet 103; the powder funnel 200 is provided with a powder feeding channel 201 for connecting with the powder inlet 103; the powder funnel 200 is provided with a protruding shielding part 204. When the powder funnel 200 is inserted into the guide rail 102 and the powder feeding channel 201 is aligned with the powder inlet 103, the shielding part 204 faces the labyrinth isolation flange 114 and is located above the inner sealing groove 112 and the outer sealing groove 113, and is used to shield the inner sealing groove 112 and the outer sealing groove 113. The compaction column 300 is adapted to the powder funnel 200; the compaction column 300 is used to pass through the powder feeding channel 201 to the powder inlet 103 and the sample chamber 101 to compact the powder sample in the sample chamber 101.
[0029] like Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, the sliding cover 400 is detachably connected to the box body 100; the sliding cover 400 is used to insert into the guide rail 102 to cover the powder filling port 103; a wedge-shaped pressing part 401 extending along the insertion direction of the sliding cover 400 is provided on the top surface of the sliding cover 400; a sealing protrusion (not shown in the figure) is provided on the bottom surface of the sliding cover 400; when the sliding cover 400 slides on the guide rail 102, the wedge-shaped pressing part 401 abuts against the guide rail 102, causing the sealing protrusion to press down on the inner sealing strip 500 and the outer sealing strip 600.
[0030] The sliding-cover quick-release sample box disclosed in this embodiment uses a completely sealed box body 100, and the sample loading and sealing are achieved only through the powder filling port 103. During sample loading, the sliding cover 400 is first removed and the powder filling funnel 200 is installed, opening the sample chamber 101. The powder sample can then smoothly fall into the chamber along the powder filling channel 201. Simultaneously, the compaction column 300 applies appropriate compression to the powder, effectively preventing powder bridging or local accumulation, and significantly improving the filling uniformity within the thin-layer chamber. After the sample chamber 101 is filled, the powder filling funnel 200 is removed, and the sliding cover 400 is reinserted along the guide rail 102 to cover the powder filling port 103, thus completing the sealing and closing of the sample chamber 101.
[0031] In this embodiment, the width of the powder filling port 103 can be set to be the same as the width of the sample cavity 101. In this way, when the powder sample is loaded, it can cover the effective sample width and fill the sample evenly, which can reduce the situation of sample accumulation in a local area.
[0032] In this embodiment, the powder filling port 103 is the only area of the sample chamber 101 that communicates with the outside. Therefore, an inner sealing strip 500 and an outer sealing strip 600 are arranged around the powder filling port 103 to achieve a double sealing effect. When the sliding cover 400 is placed on the powder filling port 103, the bottom surface of the sliding cover 400 contacts the inner sealing strip 500 and the outer sealing strip 600, which can improve airtightness. Furthermore, the additional labyrinth isolation flange 114 is higher than the inner sealing strip 500 and the outer sealing strip 600, so it can abut against the sliding cover 400, further increasing the unevenness of the contact gap between the sliding cover 400 and the box body 100, thereby forming a series leak-proof structure of "inner seal - labyrinth area - outer seal". In other words, the assembly gap between the sliding cover 400 and the box body 100 is further reduced, increasing airtightness.
[0033] like Figure 7 and Figure 8As shown, this embodiment discloses a powder-filling funnel 200 comprising a guide portion 202 and a docking portion 203 connected in sequence. The guide portion 202 is in the shape of an inverted cone. The docking portion 203 is used to dock with the powder-filling port 103. A blocking portion 204 is provided protruding from the outer side of the docking portion 203. In this embodiment, the blocking portion 204 is engaged in the guide rail 102, so the powder-filling funnel 200 can slide smoothly on the guide rail 102. When the powder-filling channel 201 is aligned with the powder-filling port 103, the two sides of the blocking portion 204 abut against the guide rail 102, and the bottom contacts the bottom of the guide rail 102, thereby maintaining stability. In addition, the guide part 202 has a wide opening shape, and the cross-sectional area of the powder feeding channel 201 is larger at the top and smaller at the bottom, which facilitates feeding and allows for the rapid addition of powder samples. During feeding, the docking part 203 is located at the port of the powder filling port 103. The powder sample enters the powder filling port 103 through the docking part 203, which reduces the chance of it scattering to the surroundings, thereby increasing the accuracy of the feeding operation. At the same time, it reduces the contamination of the inner sealing strip 500 and the outer sealing strip 600 around the powder filling port 103, and prevents powder from remaining in the inner sealing groove 112 or the outer sealing groove 113.
[0034] like Figure 5 As shown, in this embodiment, at least two wedge-shaped clamping parts 401 are arranged side by side on the top surface of the sliding cover 400. The wedge-shaped clamping parts 401 extend along the length of the sliding cover 400 and are used to abut against the top surface of the sliding groove. The length of the wedge-shaped clamping parts 401 is 6-10 mm and the height is 0.2-0.5 mm. By setting the wedge-shaped clamping parts 401, the sliding cover 400 can also generate a downward movement tendency during the process of being inserted laterally into the guide rail 102. The sealing protrusion provided on the bottom surface of the sliding cover 400 can contact the inner sealing strip 500 and the outer sealing strip 600, thereby squeezing the inner sealing strip 500 and the outer sealing strip 600, further improving the airtightness at the powder filling port 103. The length of the wedge-shaped clamping parts 401 should not be too short, and the height should not be too small, so as to prevent insufficient squeezing force between the wedge-shaped clamping parts 401 and the guide rail 102, which would prevent them from exerting an effective downward pressing effect. The height of the wedge-shaped clamping part 401 should not be too high, so as to prevent excessive friction between the wedge-shaped clamping part 401 and the sliding cover 400, which would make it difficult to disassemble and assemble the sliding cover 400.
[0035] In summary, the entire sample loading process is simple, quick to assemble and disassemble, and highly efficient. It eliminates the need for additional screws or tape for sealing, ensuring excellent leak-proof performance while preventing non-sample scattering background from extra fasteners entering the neutron beam region. The compaction column 300 provides controllable compaction depth and packing state, ensuring high consistency in the loading quality of different batches of samples, thereby effectively improving the repeatability of neutron scattering experiments and the reliability of data results.
[0036] like Figure 3 , Figure 4 and Figure 5 As shown, in another embodiment of this application, the box body 100 further includes a support frame 104, a front window panel 107, a rear window panel 109, a front sealing frame 105, a front pressure frame 108, a rear sealing frame 106, a rear pressure frame 110, and two quick-release clips 111. The support frame 104 is provided with a through-hole test channel 1041. The powder filling port 103 is located above the test channel 1041. On both sides of the support frame 104, a front mounting groove 1042 and a rear mounting groove 1043 are respectively provided around the periphery of the test channel 1041. The front sealing frame 105 is located within the front mounting groove 1042. The rear sealing frame 106 is located within the rear mounting groove 1043. The front window panel 107 is located on the side of the front sealing frame 105 facing away from the support frame 104. The front pressure frame 108 is located on the front window panel... The front window plate 107 is located on the side opposite to the front sealing frame 105; the rear window plate 109 is located on the side opposite to the support frame 104 on the rear sealing frame 106; the rear pressure frame 110 is located on the side opposite to the rear sealing frame 106 on the rear window plate 109; the sample cavity 101 is formed between the rear window plate 109 and the front window plate 107; and the front sealing frame 105 is arranged along the edge of the front window plate 107 to seal the assembly gap between the front window plate 107 and the front mounting groove 1042; the rear sealing frame 106 is arranged along the edge of the rear window plate 109 to seal the assembly gap between the rear window plate 109 and the rear mounting groove 1043; two quick-release clips 111 are inserted from both sides of the support frame 104 to simultaneously clamp the front pressure frame 108 and the rear pressure frame 110.
[0037] In this embodiment, the carrier frame 104 serves as the main carrier skeleton. A hollowed-out section in the middle of the carrier frame 104 forms a test channel 1041. A front window plate 107 and a rear window plate 109 are respectively provided on both sides of the test channel 1041 to shield it, forming a sample cavity 101 with a width of approximately 1 mm. Furthermore, a front sealing frame 105 is provided on the inner side of the front window plate 107, and a front pressure frame 108 is provided on the outer side. Both are set along the edge of the front window plate 107, forming an effective beam window in the middle. Similarly, a rear sealing frame 106 is provided on the inner side of the rear window plate 109, and a rear pressure frame 110 is provided on the outer side. Both are set along the edge of the rear window plate 109, also forming an effective beam window in the middle. Therefore, during the test, the neutron projection path passes through the effective beam window and only passes through the front window plate 107, the rear window plate 109, and the powder sample layer. This helps to reduce additional non-sample scattering background, reduce interference with the signal-to-noise ratio of the experimental data, and achieve the effect of controlling the neutron measurement background.
[0038] In this embodiment, the front mounting groove 1042 disclosed restricts the position of the front window plate 107, and the rear mounting groove 1043 restricts the position of the rear window plate 109; the front pressing frame 108 abuts against the front sealing frame 105. When the quick-release clamp 111 applies a clamping force to the front pressing frame 108, the front pressing frame 108 transmits the acting force to the front sealing frame 105, so that the front sealing frame 105 is clamped into the gap between the front window plate 107 and the front mounting groove 1042, thereby improving the air tightness of the sample chamber 101 and reducing the risk of powder leakage; similarly, when the rear pressing frame 110 receives the clamping force of the quick-release clamp 111, it transmits the acting force to the rear sealing frame 106, so that the rear sealing frame 106 is clamped into the gap between the rear window plate 109 and the rear mounting groove 1043, further improving the air tightness of the sample chamber 101.
[0039] In addition, since the quick-release clamp 111 applies pressure to both the front pressing frame 108 and the rear pressing frame 110 at the same time, the pressure received by the two is the same. According to the force transmission path, it can be inferred that the pressure received on the front window plate 107 and the rear window plate 109 is equal, so the forces on both sides of the bearing frame 104 are uniform, which further improves the stability and air tightness of the sample chamber 101 and prevents powder from leaking out from a single side.
[0040] Furthermore, both the front pressing frame 108 and the rear pressing frame 110 provided in this embodiment are annular, and are arranged around the edges of the front window plate 107 and the rear window plate 109 respectively. The quick-release clamp 111 can adopt an elastic U-shaped clamp, a sliding-in dovetail clamp, an eccentric buckle or a shrapnel locking clamp, which can provide holding force to the front pressing frame 108 and the rear pressing frame 110; when under pressure, the front pressing frame 108 uniformly transmits the pressure to the front window plate 107, and the rear pressing frame 110 uniformly transmits the pressure to the rear window plate 109, reducing local stress concentration and avoiding the warping problem of the front window plate 107 or the rear window plate 109; in addition, the compression amount at each position on the front sealing frame 105 and the rear sealing frame 106 is stabilized, the problem of insufficient local air tightness is avoided, and the air tightness of the sample chamber 101 is further improved.
[0041] Specifically, the quick-release clamp 111 disclosed in this embodiment can be configured in a "U" shape, and two quick-release clamps 111 respectively enclose the bearing frame 104 from both sides. The distance between the two side walls of the quick-release clamp 111 can be set to be equal to or slightly less than the width of the bearing frame 104. When the quick-release clamp 111 is assembled with the bearing frame 104, the two side walls of the quick-release clamp 111 can respectively press tightly against the front pressing frame 108 and the rear pressing frame 110 to fix the structure of the box body 100.
[0042] In conclusion, the box body 100 disclosed in this embodiment is assembled from a plurality of components, no additional bolts or pins are required for fixation, which facilitates rapid maintenance; the assembly is simple, and both structural stability and air tightness are achieved.
[0043] Specifically, the assembly process of the box 100 disclosed in this embodiment is as follows: Step A1: Clean the front mounting groove 1042 and rear mounting groove 1043 on both sides of the carrier frame 104 to ensure there is no dust, burrs and scratches; Step A2: Place the front sealing frame 105 and the rear sealing frame 106 into the front mounting groove 1042 and the rear mounting groove 1043 respectively; Step A3: Place the front window plate 107 and the rear window plate 109 into the front mounting groove 1042 and the rear mounting groove 1043 respectively, so that the effective transparent / low background area is aligned with the test channel 1041; Step A4: Install the front pressure frame 108 and the rear pressure frame 110 on the outer sides of the front window panel 107 and the rear window panel 109 respectively, so that the opening between the front pressure frame 108 and the rear pressure frame 110 avoids the effective window. Step A5: Push the two quick-release clamps 111 on the left and right sides into place along the clamping guide positions on both sides of the bearing frame 104, so that the front pressure frame 108 and the rear pressure frame 110 are squeezed at the same time, and the front sealing frame 105 and the rear sealing frame 106 are pressed tightly. Step A6: Check whether the front window panel 107 and the rear window panel 109 are continuous and whether there is any warping around them, and perform leak prevention verification with tracer powder or facility approval.
[0044] In another embodiment of this invention, the assembled box 100 has external dimensions of approximately 60mm × 50mm × 3.4mm, an effective beam window of 30mm × 30mm, and a sample layer thickness of 1.00mm between the inner surfaces of the front window plate 107 and the rear window plate 109. The powder inlet 103 has a width of 32mm and a thickness dimension of 1.50mm. The dimensions of the front window plate 107 and the rear window plate 109 are approximately 40mm × 38mm × 0.4mm.
[0045] Specifically, as another embodiment of this application, it is disclosed that the front sealing frame 105 and the rear sealing frame 106 have the same specifications and the same material, and the free thickness of both is 0.35 mm, the thickness after compression is about 0.27 mm, and the compression rate is about 22.9%.
[0046] For example Figure 3 and Figure 4As shown in another embodiment of this application, a front positioning slot 1044 is provided on the outer side of the front mounting groove 1042; a front abutment block 1081 and a front positioning block 1082 are provided on the side of the front pressure frame 108 facing the front window plate 107. The front abutment block 1081 is used to press against the front window plate 107, and the front positioning block 1082 is engaged with the front positioning slot 1044. By limiting the front pressure frame 108 through the front positioning slot 1044 and the front positioning block 1082, the front pressure frame 108 and the front window plate 107 will not shift even when subjected to pressure in the assembled state, thereby maintaining structural stability and avoiding affecting the airtightness of the sample chamber 101.
[0047] For example Figure 3 and Figure 4 As shown in the figure, this embodiment also discloses that a rear positioning slot 1045 is provided on the outer side of the rear mounting groove 1043; a rear abutment block 1101 and a rear positioning block 1102 are provided on the side of the rear pressure frame 110 facing the rear window plate 109. The rear abutment block 1101 is used to press against the rear window plate 109, and the rear positioning block 1102 is engaged with the rear positioning slot 1045. Through the rear positioning slot 1045 and the rear positioning block 1102, the stability of the rear window plate 109, the rear sealing frame 106 and the rear pressure plate can be maintained, the displacement can be reduced, and the stability of the box body 100 structure can be further improved.
[0048] For example Figure 4 and Figure 5 As shown, in another embodiment of this application, a bayonet 1046 is provided on the side wall of the support frame 104; the quick-release clamp 111 is provided with an assembly channel 1111 adapted to the support frame 104; and the quick-release clamp 111 is configured such that when the support frame 104 is laterally inserted into the assembly channel 1111, the side walls on both sides of the assembly channel 1111 respectively abut against the front pressure frame 108 and the rear pressure frame 110; an elastic buckle 1112 is provided in the assembly channel 1111 at a position opposite to the bayonet 1046, and the elastic buckle 1112 is used to lock the quick-release clamp 111 onto the support frame 104.
[0049] In this embodiment, when the quick-release clamp 111 is assembled with the support frame 104, the elastic latch 1112 engages with the bayonet 1046, preventing the quick-release clamp 111 from automatically detaching. Only when the housing 100 is removed, the operator manually or by controlling a robotic arm to push the elastic latch 1112 outwards, separating it from the bayonet 1046, can the quick-release clamp 111 be removed. Therefore, the connection between the quick-release clamp 111 and the support frame 104 is robust, and the structure of the housing 100 remains stable during use. Moreover, compared to screws or nuts, the use of the elastic latch 1112 in this embodiment simplifies operation and improves assembly and maintenance efficiency.
[0050] Specifically, as another embodiment of this application, the front window plate 107 is disclosed as any one of an aluminum plate, a vanadium plate, or a zirconium-titanium alloy plate; or, the rear window plate 109 is any one of an aluminum plate, a vanadium plate, or a zirconium-titanium alloy plate. In this embodiment, the front window plate 107 and the rear window plate 109 can be made of the same material. Low-background aluminum, vanadium, or zirconium-titanium alloys can suppress stray coherent scattering while ensuring high neutron penetration and tolerance to extreme environments; moreover, they are non-magnetic and can be rolled into a dense foil of uniform thickness, which is beneficial for maintaining neutron optical path consistency in the beam spot region.
[0051] Specifically, as another embodiment of this application, it is disclosed that the support frame 104 can be fabricated using facility-approved low-background aluminum alloy; the sliding cover 400, the powder funnel 200, and the compaction column 300 can be fabricated using polyetheretherketone (PEEK) or other suitable engineering plastics.
[0052] Specifically, in another embodiment of this invention, the free thickness of the inner sealing strip 500 and the outer sealing strip 600 is disclosed to be 0.6-1.0 mm, and the compression rate is 20-30%. Preferably, the free thickness of the inner sealing strip 500 and the outer sealing strip 600 is 0.8 mm, and the compressed thickness is 0.62 mm, with a compression rate of approximately 22.5%. Moreover, both the inner sealing strip 500 and the outer sealing strip 600 can be any one of a frame ring, O-ring, shaped lip ring, or thin sheet gasket, and the inner and outer seals can be made of different materials or combinations of different hardnesses.
[0053] like Figure 8As shown, in another embodiment of this invention, the shielding part 204 is disclosed as a structure that protrudes laterally from the mating part 203, which can shield the inner sealing groove 112 and the outer sealing groove 113 during material feeding. Specifically, a support wall is provided at the edge of the shielding part 204, surrounding the periphery of the outer sealing groove 113, so that the shielding part 204 is suspended above the inner sealing strip 500 and the outer sealing strip 600. The shielding part 204 can prevent powder from accidentally leaking into the inner sealing groove 112 or the outer sealing groove 113 during material feeding, thus avoiding affecting the tightness of the contact between the sliding cover 400 and the inner sealing strip 500, or between the sliding cover 400 and the outer sealing strip 600. In other words, it avoids affecting the airtightness at the end face of the powder filling port 103.
[0054] For example Figure 8 As shown, in another embodiment of this application, the compaction column 300 includes a compaction handle 301 and a stroke limiting member 302. The lower end of the compaction handle 301 is provided with a compaction sheet 3011, and the top end is provided with a gripping part 3012. The compaction sheet 3011 is used to insert into the powder filling port 103 to compact the powder sample. The cross-sectional area of the gripping part 3012 is larger than the cross-sectional area of the compaction sheet 3011, and it is used for gripping. The stroke limiting member 302 is engaged with the compaction handle 301. The stroke limiting member 302 has a first limiting member and a second limiting member. The thickness of the first limiting member is 0.4 mm, and the first limiting member is used to level the powder sample. The thickness of the second limiting member is 0.8 mm, and the second limiting member is used to lightly press the powder sample.
[0055] The compaction sheet 3011 disclosed in this embodiment is adapted to the shape of the sample cavity 101 and can be set as a relatively thin sheet. To facilitate gripping and pressure application, a gripping part 3012 is provided above the compaction sheet 3011. When compacting the powder, the gripping part 3012 can be grasped manually or by a robotic arm, and then the compaction column 300 is moved vertically downward. The compaction sheet 3011 can enter the powder feeding channel 201, pass through the powder filling port 103, and finally enter the sample cavity 101 to push the powder sample. The bottom of the compaction sheet 3011 can be chamfered to facilitate smooth entry into the sample cavity 101 and reduce friction with the side wall of the sample cavity 101, reducing the risk of scratching the front window plate 107 or the rear window plate 109 and avoiding the generation of debris.
[0056] Specifically, in this embodiment, a travel limiter 302 is provided to engage with the compaction sheet 3011. When the travel limiter 302 abuts against the inner wall of the powder hopper, it achieves the effect of limiting the travel of the compaction sheet 3011. Specifically, the travel limiter 302 is U-shaped and laterally engages with the compaction sheet 3011. As the compaction sheet 3011 gradually descends, the travel limiter 302 can move up and down along the movement direction of the compaction sheet 3011, thereby adjusting the depth of the compaction sheet 3011 inserted into the sample cavity 101. In this way, excessive pressure can be avoided, preventing the sample cavity 101 from breaking and being damaged due to pressure exceeding the limit.
[0057] Specifically, the stroke limiting component 302 disclosed in this embodiment includes a first limiting component with a thickness of 0.4 mm and a second limiting component with a thickness of 0.8 mm. The first and second limiting components are alternative components and can be used selectively, corresponding to two different working conditions: leveling and light pressing. In the initial stage of sample loading, the powder is not yet fully filled and the accumulation is loose. If the pressing stroke of the compaction sheet 3011 is too large, it is easy to cause local powder to be over-compacted and the sample layer to have uneven thickness. At this time, the second limiting component with a thickness of 0.8 mm can be used to limit the pressing depth of the compaction sheet 3011 and achieve a light pressing effect. When the sample cavity 101 is almost full and final leveling is required, if the pressing stroke is too small, it is difficult to compact the surface powder to the designed density. At this time, the first limiting component with a thickness of 0.4 mm can be replaced to increase the pressing depth of the compaction sheet 3011 and achieve a leveling effect.
[0058] By replacing the stroke limiter 302 with different thicknesses, the compaction depth can be flexibly adjusted according to the powder accumulation state at different stages of the sample loading process without changing the main structure of the compaction column 300. This avoids the problem of local over-compression or under-compression that may be caused by a single fixed stroke compaction column 300, and takes into account both the uniformity of filling and the structural safety of the sample cavity 101, the front window plate 107, and the rear window plate 109.
[0059] For example Figure 5 As shown, in another embodiment of this application, a sliding groove is provided on the guide rail 102, and a positioning port 1021 is provided on the side wall of the sliding groove; an elastic locking protrusion 402 is provided on the side wall of the sliding cover 400; the elastic locking protrusion 402 is used to adapt to the positioning port 1021.
[0060] After the sliding cover 400 disclosed in this embodiment is installed in place, the elastic latch 402 aligns with the positioning port 1021 and pops out laterally, thereby locking it in place. This prevents the sliding cover 400 from accidentally slipping off the guide rail 102. In this way, the box body 100 and the sliding cover 400 can remain stable during the experiment, further improving the stability of the experiment, increasing the repeatability of the experiment, and enhancing the reliability of the experimental results.
[0061] like Figure 9 As shown, this application also discloses a method for loading a sliding-cover quick-release sample box for neutron testing powder samples, applicable to any of the sliding-cover quick-release sample boxes for neutron testing powder samples described above; wherein, it includes: Step S10: Remove the sliding cover 400 and open the powder filling port 103.
[0062] Step S20: Insert the powder funnel 200 into the guide rail 102 until the powder filling channel 201 is aligned with the powder filling port 103.
[0063] Step S30: Weigh the powder sample to be tested quantitatively, divide it into multiple portions, and add it to the powder adding channel 201 one by one until all the powder samples are loaded into the sample cavity 101; wherein, after each addition of powder sample, insert the compaction column 300 to repeatedly level it 1-3 times, and the leveling and pressing time is 2-3 seconds each time.
[0064] Add the powder sample in batches, and tap the powder funnel 200 lightly if necessary to promote powder falling into the sample cavity 101 and reduce residue on the inner wall of the powder funnel 200. Press lightly 1-2 times each time the powder is added to reduce bridging and voids; after the powder is completely added, compact and level it, repeating the light pressing 2-3 times to improve the flatness and uniformity of the sample in the entire sample cavity 101.
[0065] It should be noted that the number of leveling operations and the compression time must be balanced between "filling uniformity" and "structural safety of sample cavity 101": too few leveling operations or too short compression time can easily lead to bridging or local voids between powder samples, resulting in uneven density distribution within sample cavity 101 and affecting the repeatability of neutron scattering experimental data; while too many leveling operations or too long single compression time will cause the force exerted by the compaction column 300 on the inner wall of sample cavity 101 to accumulate continuously, increasing the risk of fatigue deformation or even cracking of the front window plate 107 and rear window plate 109 due to repeated compression, and also reducing the overall efficiency of sample loading. Controlling the number of leveling operations to 1-3 times and the single compression time to 2-3 seconds is an operational method determined by ensuring the uniformity of powder filling within the thin sample cavity 101 (approximately 1 mm thick) while taking into account the structural safety of the window plate and sample loading efficiency, and is not a conventional parameter optimization aimed at a single indicator.
[0066] Step S40: Remove the compaction column 300 and the powder funnel 200, and remove the residual powder sample around the powder inlet 103; then push the sliding cover 400 into the guide rail 102 and lock it to close the powder inlet 103.
[0067] Powder samples around the powder inlet 103 can be removed with a fiber-free wiping tool.
[0068] Step S50: Flip the box 100 to perform an appearance inspection and a tracer powder flipping and shaking test. If it is confirmed that there is no powder leakage, the sample loading is completed.
[0069] In this embodiment, by removing the sliding cover 400, the powder sample is added and compacted in stages, which quickly completes the powder sample filling operation and improves the uniformity of filling. The operation method is simple and highly repeatable. After filling, the box body 100 is sealed by the sliding cover 400 and the airtightness is checked, which ensures the sample box has stable sample quality and high repeatability. This is beneficial for batch verification of experimental results, improves the repeatability of the experiment, and increases the reliability of the experimental results.
[0070] In summary, this application discloses a sliding-cover quick-release sample box for neutron testing powder samples and its sample loading method, including a box body 100, an inner sealing strip 500, an outer sealing strip 600, a powder loading funnel 200, a compaction column 300, and a sliding cover 400. The box body 100 is provided with a sample cavity 101 for accommodating powder samples. A guide rail 102 is provided on the top of the box body 100, and a powder loading port 103 communicating with the sample cavity 101 is provided at the bottom of the guide rail 102. Furthermore, the box body 100 is provided with an inner sealing groove 112 and an outer sealing groove 113, which are nested around the powder loading port 103. The box body 100 is also provided with a labyrinth isolation flange 114, which is located between the inner sealing groove 112 and the outer sealing groove 113. The inner sealing strip 500 and the outer sealing strip 600 are respectively disposed in the inner sealing groove 112 and the outer sealing groove 113; the top surface of the labyrinth isolation flange 114 is higher than the height of the inner sealing strip 500 and the height of the outer sealing strip 600. The powder funnel 200 can slide along the guide rail 102 to above the powder filling port 103; the powder funnel 200 is provided with a powder filling channel 201 for connecting with the powder filling port 103; the powder funnel 200 is provided with a protruding blocking part 204. When the powder funnel 200 is inserted into the guide rail 102 and the powder filling channel 201 is aligned with the powder filling port 103, the blocking part 204 faces the labyrinth isolation flange 114 and is located above the inner sealing groove 112 and the outer sealing groove 113, and is used to block the inner sealing groove 112 and the outer sealing groove 113. The compaction column 300 is adapted to the powder funnel 200; the compaction column 300 is used to pass through the powder filling channel 201 to the powder filling port 103 and the sample chamber 101 to compact the powder sample in the sample chamber 101; the sliding cover 400 is detachably connected to the box body 100; the sliding cover 400 is used to insert into the guide rail 102 to cover the powder filling port 103; a wedge-shaped pressing part 401 extending along the insertion direction of the sliding cover 400 is provided on the top surface of the sliding cover 400; a sealing protrusion is provided on the bottom surface of the sliding cover 400; when the sliding cover 400 slides on the guide rail 102, the wedge-shaped pressing part 401 abuts against the guide rail 102, causing the sealing protrusion to press down on the inner sealing strip 500 and the outer sealing strip 600. Powder samples can be efficiently filled by assembling and disassembling the powder funnel 200 and sliding cover 400. Simultaneously, the compaction column 300 applies appropriate compression to the powder, effectively preventing powder bridging or localized accumulation and significantly improving the filling uniformity within the thin-layer cavity. The sample loading process is simple, quick to assemble and disassemble, highly efficient, and maintains a high degree of consistency in loading quality, thereby effectively improving the repeatability of neutron scattering experiments and the reliability of data results.
[0071] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.
[0072] It should be noted that this invention uses a sliding quick-release sample box for neutron testing powder samples and its sample loading method as an example to introduce the specific structure and working principle of the invention. However, the application of this invention is not limited to the sliding quick-release sample box for neutron testing powder samples and its sample loading method, and can also be applied to the production and use of other similar workpieces.
[0073] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.
[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A sliding-cover quick-release sample box for neutron testing of powder samples, characterized in that, include: The box body has a sample cavity for containing powder samples. The top of the box is provided with a guide rail, and the bottom of the guide rail is provided with a powder filling port that communicates with the sample chamber; in addition, the box is provided with an inner sealing groove and an outer sealing groove, which are nested around the powder filling port; the box is also provided with a labyrinth isolation flange, which is located between the inner sealing groove and the outer sealing groove. An inner sealing strip and an outer sealing strip are respectively disposed in the inner sealing groove and the outer sealing groove; when the inner sealing strip and the outer sealing strip are installed in place, the top surface of the labyrinth isolation flange is higher than the top surface of the inner sealing strip and the top surface of the outer sealing strip; A powder-filling funnel can slide along the guide rail to above the powder-filling opening; the powder-filling funnel is provided with a powder-adding channel for connecting with the powder-filling opening; the powder-filling funnel is provided with a protruding shielding part, when the powder-filling funnel is inserted into the guide rail and the powder-adding channel is aligned with the powder-filling opening, the shielding part is directly opposite the labyrinth isolation flange, located above the inner sealing groove and the outer sealing groove, and is used to shield the inner sealing groove and the outer sealing groove; A compaction column, adapted to the powder filling funnel; the compaction column is used to pass through the powder filling channel to the powder filling port and the sample cavity to compact the powder sample in the sample cavity; A sliding cover is detachably connected to the box body; the sliding cover is used to insert into the guide rail to cover the powder filling port; a wedge-shaped pressing part extending along the insertion direction of the sliding cover is provided on the top surface of the sliding cover; a sealing protrusion is provided on the bottom surface of the sliding cover; when the sliding cover slides on the guide rail, the wedge-shaped pressing part abuts against the guide rail, causing the sealing protrusion to press down on the inner sealing strip and the outer sealing strip.
2. The sliding-cover quick-release sample box for neutron testing powder samples according to claim 1, characterized in that, The housing also includes: A support frame is provided with a test channel that runs through the front and back; the powder filling port is located above the test channel; on both sides of the support frame, a front mounting groove and a rear mounting groove are respectively provided around the periphery of the test channel. A front sealing frame and a rear sealing frame, wherein the front sealing frame is disposed within the front mounting groove; and the rear sealing frame is disposed within the rear mounting groove. A front window panel and a front pressure frame, wherein the front window panel is disposed on the side of the front sealing frame opposite to the support frame; and the front pressure frame is disposed on the side of the front window panel opposite to the front sealing frame. The rear window plate and the rear pressure frame are provided. The rear window plate is disposed on the side of the rear sealing frame opposite to the support frame. The rear pressure frame is disposed on the side of the rear window plate opposite to the rear sealing frame. The sample cavity is formed between the rear window plate and the front window plate. The front sealing frame is arranged along the edge of the front window plate to seal the assembly gap between the front window plate and the front mounting groove. The rear sealing frame is arranged along the edge of the rear window plate to seal the assembly gap between the rear window plate and the rear mounting groove. Two quick-release clamps are inserted from both sides of the support frame to simultaneously clamp the front pressure frame and the rear pressure frame.
3. The sliding-cover quick-release sample box for neutron testing powder samples according to claim 2, characterized in that, A front positioning slot is provided on the outer side of the front mounting groove; a front abutment block and a front positioning block are provided on the side of the front pressure frame facing the front window panel, the front abutment block is used to press against the front window panel, and the front positioning block is engaged with the front positioning slot; and / or, A rear positioning slot is provided on the outer side of the rear mounting groove; a rear abutment block and a rear positioning block are provided on the side of the rear pressure frame facing the rear window panel, the rear abutment block is used to press against the rear window panel, and the rear positioning block is engaged with the rear positioning slot.
4. The sliding-cover quick-release sample box for neutron testing powder samples according to claim 2, characterized in that, The side wall of the support frame is provided with a bayonet; the quick-release clamp is provided with an assembly groove adapted to the support frame; and the quick-release clamp is configured such that when the support frame is laterally inserted into the assembly groove, the side walls on both sides of the assembly groove abut against the front pressure frame and the rear pressure frame respectively. The assembly channel is provided with an elastic buckle at the position opposite the bayonet, and the elastic buckle is used to lock the quick-release clamp onto the support frame.
5. The sliding-cover quick-release sample box for neutron testing powder samples according to claim 2, characterized in that, Both the front window plate and the rear window plate are made of aluminum plate, vanadium plate, or zirconium-titanium alloy plate, and both the front window plate and the rear window plate are made of dense foil material formed by rolling, with a thickness of 0.3-0.5 mm.
6. The sliding-cover quick-release sample box for neutron testing powder samples according to claim 1, characterized in that, The free thickness of the inner sealing strip and the outer sealing strip is 0.6-1.0 mm, and the compression rate is 20%-30%. Both the inner sealing strip and the outer sealing strip are any one of the following: frame ring, O-ring, special-shaped lip ring, and thin sheet gasket; The inner sealing strip and the outer sealing strip are made of different materials or have different hardness.
7. The sliding-cover quick-release sample box for neutron testing powder samples according to claim 1, characterized in that, The edge of the shielding part is provided with a support wall, which surrounds the outer sealing groove, so that the shielding part is suspended above the inner sealing strip and the outer sealing strip.
8. The sliding-cover quick-release sample box for neutron testing powder samples according to claim 1, characterized in that, The compaction column includes: The compaction handle has a compaction sheet at the lower end and a gripping part at the top end; the compaction sheet is used to be inserted into the powder filling port to compact the powder sample; the cross-sectional area of the gripping part is larger than the cross-sectional area of the compaction sheet, and is used for gripping. A travel limiter engages with the compaction handle; the travel limiter includes a first limiter and a second limiter, the first limiter having a thickness of 0.4 mm and being used to level the powder sample; the second limiter having a thickness of 0.8 mm and being used to lightly press the powder sample.
9. The sliding-cover quick-release sample box for neutron testing powder samples according to claim 1, characterized in that, The guide rail is provided with a sliding groove, and the side wall of the sliding groove is provided with a positioning port; The sliding cover has an elastic locking protrusion on its side wall; the elastic locking protrusion is used to fit the positioning port.
10. A method for loading a sliding-cover quick-release sample box for neutron testing powder samples, applied to the sliding-cover quick-release sample box for neutron testing powder samples as described in any one of claims 1 to 9; characterized in that, include: Remove the sliding cover and open the powder filling port; Insert the powder funnel into the guide rail until the powder filling channel is aligned with the powder filling port; Weigh the powder sample to be tested quantitatively, divide it into multiple portions, and add it into the powder adding channel one by one until all the powder sample is loaded into the sample cavity; after each addition of powder sample, insert the compaction column and repeatedly level it 1-3 times, with each leveling and pressing time being 2-3 seconds. Remove the compaction column and the powder funnel, and remove any residual powder sample around the powder inlet; then push the sliding cover into the guide rail and lock it to seal the powder inlet; Invert the box for visual inspection and perform a shaking test on the tracer powder. If no powder leakage is confirmed, the sample loading is complete.