X-ray fluorescence detector calibration device

Abstract

The invention relates to a calibration device for an X-ray fluorescence detector. Comprising a calibration cup, a calibration disc, a batching mechanism and a waste collection mechanism. A material opening is formed in the bottom of the calibration cup, a first one-way valve is arranged at the position of the material opening, a cup cover and an opening and closing mechanism are arranged at the position of an upper cup opening of the calibration cup, the calibration disc is provided with a containing groove, an upwards-protruding ejector rod is arranged at the center of the bottom of the containing groove and used for ejecting the first one-way valve, and a butt joint opening coaxial with the material opening in diameter is formed in the periphery of the ejector rod. The lower end of the butt joint port is connected with a two-position three-way valve, the other two ports of the two-position three-way valve are connected with a feeding connector and a discharging connector respectively, the batching mechanism is located in the calibration disc and comprises a batching barrel, the batching barrel is connected with a first feeding mechanism and a second feeding mechanism which can feed materials into an inner cavity of the batching barrel in a quantitative mode, and a stirring mechanism is further arranged in the batching barrel. And an outlet of the batching barrel is connected with a second one-way valve which is communicated downwards in one direction.

Description

Technical Field

[0001] This invention relates to a calibration device for an X-ray fluorescence detector. Background Technology

[0002] X-ray fluorescence detectors are mainly used for the quantitative analysis of heavy metal elements such as lead, cadmium, mercury, arsenic, and chromium in media such as food, water, and soil (when used for food testing, they are also called rapid food heavy metal detectors). They serve safety screening in fields such as food and drug supervision, environmental monitoring, and agricultural production. The working principle is as follows: primary X-rays are emitted from an X-ray tube and incident on the sample. The heavy metal elements to be measured in the sample are excited by high-energy X-rays and generate characteristic X-rays, which are received by a high-performance silicon drift detector. After data processing, the content of heavy metal elements is obtained.

[0003] like Figure 1 The image shows a commonly used X-ray fluorescence detector. It has mounting threaded holes on the bottom plate of the detection chamber and a sample tray is installed by bolts. The sample tray has multiple slots for placing sample cups. During detection, the sample in the slot is picked up by the gripper and placed at the detection position for detection.

[0004] To calibrate this X-ray fluorescence detector, the "Calibration Specification for Rapid Heavy Metal Detectors in Food JJF (Beijing) 113-2023" specifies the following requirements: First, calibration of indication error and measurement repeatability must be performed. Calibration of indication error requires meeting the following conditions: Values ​​must be taken within high (≥0.4 mg / kg), medium (0.2-0.4 mg / kg), and low (<0.2 mg / kg) content ranges (referring to the content of the target heavy metal in media such as corn starch or cereal starch), and standard substances must be provided for each value. Each standard substance must be measured three times, and the samples measured each time must be unique. For example, a standard substance with a content of 0.1 mg / kg must be provided, and the rapid heavy metal detector to be calibrated must be used to detect the standard substance. The error value between the detected reading and the calibrated content of the standard substance is compared to analyze the detection error for calibration adjustment. Calibration of measurement repeatability requires meeting the following requirements: Select a standard substance within the content range of 0.2-0.4 mg / kg and measure it seven times.

[0005] Because the standard requires that standard substances with different content ranges be measured multiple times, and some of them require that the samples measured each time be different, the traditional method generally requires more than a dozen sample cups to hold samples with different content values ​​to be tested, and then placing the sample cups one by one at the measurement station for measurement. Not only does the entire calibration process require the use of many sample cups, disposable containers and other accessories, but the entire process is also cumbersome, time-consuming and inefficient. Summary of the Invention

[0006] The purpose of this invention is to provide a calibration device for an X-ray fluorescence detector, which solves the technical problem that existing calibration methods use a large number of disposable containers, sample cups and other accessories, and are cumbersome, time-consuming and inefficient, which seriously restricts the calibration speed.

[0007] The technical solution of the present invention is as follows: An X-ray fluorescence detector calibration device includes: The calibration cup has the same external dimensions as the sample cup. A material inlet is located at the bottom axis, and a first one-way valve that leads upwards is located at the material inlet. A rotatable and closable cup lid and opening and closing mechanism are located at the upper part of the calibration cup. The calibration tray has a placement slot for placing calibration cups. A top rod protruding upwards is located at the center of the bottom of the placement slot for inserting into the material port and opening the first one-way valve. The outer periphery of the top rod has a mating interface with the same diameter and coaxiality as the material port. A two-position three-way valve is connected to the lower end of the mating interface. The other two ports of the two-position three-way valve are respectively connected to the feed connector and the discharge connector. The mixing mechanism, located inside the calibration plate, includes a mixing tank. The mixing tank is connected to a first feeding mechanism and a second feeding mechanism that can quantitatively add materials to its inner cavity. The mixing tank is also equipped with a stirring mechanism. The outlet of the mixing tank is connected to a second one-way valve that leads downwards. The lower part of the second one-way valve is connected to a three-way connector. The other two ports of the three-way connector are respectively connected to a high-pressure gas tank and a feeding pipe. The other end of the feeding pipe is connected to the inlet connector. An electric control valve is provided at the outlet of the high-pressure gas tank. The waste collection mechanism includes a waste collection bin, the inlet of which is connected to the discharge connector, and a collection vacuum pump is provided at the outlet of the waste collection bin.

[0008] The beneficial effects of this technical solution are as follows: During use, the sample tray on the rapid heavy metal detector can be removed, and a calibration tray of the same size as that in this application can be installed. The calibration cup is placed in the placement slot of the calibration tray, and the cup lid is closed via the opening and closing mechanism. The two-position three-way valve is switched to connect with the waste collection mechanism, and the waste collection mechanism is started. A vacuum pump is used to evacuate the calibration cup. The heavy metal powder to be tested and the starch powder to be tested are added to the first and second feeding mechanisms, respectively. According to the program settings, the first and second feeding mechanisms are controlled to add a fixed amount of heavy metal powder and material powder to the mixing tank, and the mixture is stirred evenly by the stirring mechanism. The vacuum pump is then turned off, and the two-position three-way valve is switched to connect the interface with the feed interface. With the head connected to the feed pipe, open the electric control valve of the high-pressure gas tank. High-pressure gas is ejected from the high-pressure gas tank and enters the three-way connector. Due to the setting of the second one-way valve, the high-pressure gas will enter the two-position three-way valve along the feed pipe, and then enter the calibration cup through the first one-way valve. At the same time, the vacuum suction opens the second one-way valve and draws the stirred sample in the mixing tank into the calibration cup. After the feeding is completed, close the electric control valve and take out the calibration cup and send it to the test position. The first one-way valve will close automatically. After the test is completed, put it back into the placement tank and repeat the above steps of the waste collection mechanism and the mixing mechanism to extract the sample in the sample cup and return it to the waste collection tank. Then, send the newly prepared sample into the sample cup for the next test, until all sample tests are completed.

[0009] It is clear from the above process that the solution proposed in this application does not require multiple sample cups. A single calibration cup can complete more than ten test calibrations. Moreover, it can meet the requirements of different samples and different sample concentrations for each test. Furthermore, the entire process does not require direct manual operation. The test can be completed automatically through a preset program, which significantly improves the degree of automation and further enhances the testing efficiency.

[0010] Based on the above scheme, further improvements are made as follows: the feed tubes are rigid tubes, with at least two arranged side-by-side and mounted on a rotating frame. The rotating frame is driven to rotate via a gear mechanism, allowing one of the feed tubes to connect with the inlet connector and the tee connector. The feed tubes also have a cleaning position during rotation. A cleaning mechanism is provided inside the calibration disc at the corresponding cleaning position. The cleaning mechanism includes a first cleaning tube and a second cleaning tube, which are respectively connected to the two ends of the feed tube in the cleaning position. The first cleaning tube contains a sponge projectile, and the other end of the second cleaning tube is connected to a cleaning tank. A cleaning vacuum pump is provided at the outlet of the cleaning tank. This cleaning mechanism, combined with the structure of at least two rigid feed tubes, allows the sponge projectile to remove and recover any small amount of sample adhering to the feed tube, preventing subsequent testing of samples of different concentrations from affecting the results.

[0011] Based on the above solution, further improvements are made as follows: multiple sponge projectiles are installed inside the first cleaning tube. Multiple sponge projectiles facilitate sealing and reduce the tediousness of frequent manual addition of sponge projectiles. Each cleaning cycle only removes one sponge projectile; only after the preceding sponge projectile detaches from the second cleaning tube will the subsequent sponge projectiles be attracted and move.

[0012] Based on the above scheme, further improvements are made as follows: the two end faces of the feed pipe are the first mating plane perpendicular to the axis of the feed pipe; the feed connector and the tee connector are mated to the first mating plane through the second mating plane; the first and second cleaning pipes are mated to the first mating plane through the third mating plane; and the first, second, and third mating planes are coplanar. The arrangement of the first, second, and third mating planes makes mating easier and more conducive to sealing when the feed pipe switches between the working position and the cleaning position.

[0013] Based on the above solution, the following improvements are made: a flat sealing gasket is embedded on the first mating surface. This further improves the sealing performance of the mating.

[0014] Based on the above scheme, further improvements are made as follows: Two powder inlets communicating with the inside of the mixing tank are provided on the upper side wall. The first and second feeding mechanisms are respectively connected to the two powder inlets. Both the first and second feeding mechanisms include cylindrical feeding chambers, within which a spiral feeding mechanism is installed. Arc-shaped cover plates are hinged to the inner wall of the mixing tank corresponding to the two powder inlets via hinge shafts. The cover plates are respectively placed over the powder inlets. A torsion spring is provided at the hinge shaft to provide elastic force for the cover plates to press towards the powder inlets. This structure allows for precise addition of both materials. The arc-shaped cover plate design prevents material from being sucked away from the feeding mechanism when the high-pressure gas tank aspirates the prepared sample.

[0015] Based on the above scheme, the following improvements are made: the feeding chamber is set with its axis gradually tilted upwards from the direction away from the powder inlet to the direction closer to the powder inlet.

[0016] Based on the above scheme, the following improvements are made: the rotating frame is rotatably mounted in the calibration disk via bearings, and the gear mechanism includes a drive motor, a driving gear, and a driven gear fixed on the rotating frame.

[0017] Based on the above solution, further improvements are made as follows: filters are installed at the outlets of the waste collection bin and the washing bin. This prevents sample powder from being blown out of the outlet, thereby achieving sample powder recovery.

[0018] Based on the above scheme, the following improvements are made: the mixing tank has a conical inner cavity that is larger at the top and smaller at the bottom; the stirring mechanism includes a stirring motor and a stirring paddle that are coaxially arranged with the mixing tank; the stirring paddle includes a stirring shaft and blades that are fitted against the cavity wall of the conical inner cavity; and the blades are connected to the stirring shaft through a connecting rod. Attached Figure Description

[0019] Figure 1 This is a front view of an existing X-ray fluorescence detector; Figure 2 This is a top view schematic diagram of a specific embodiment of an X-ray fluorescence detector calibration device according to the present invention; Figure 3 for Figure 2 Front view (partial section); Figure 4 for Figure 3 A magnified view of a section at point A in the middle; Figure 5 for Figure 3 A magnified view of a section at point B in the middle; Figure 6 for Figure 3 A magnified view of a section at point C; Figure 7 for Figure 3 A magnified view of a section at point D; Figure 8 for Figure 3 A magnified view of a section at point E in the middle; Figure 9 for Figure 3 A magnified view of a section at point F in the middle; Figure 10 for Figure 3 A magnified view of a section at point G in the middle; Figure 11 for Figure 3 A magnified view of a section at point H in the middle; In the diagram: 1-Base plate, 2-Sample tray, 3-Sample cup; 4-Calibration cup, 41-Material inlet, 42-First one-way valve, 43-Cup lid, 44-Opening and closing mechanism, 441-Opening and closing motor, 442-Bracket, 5-Calibration disc, 51-Placement slot, 52-Top rod, 53-Matching interface, 54-Two-position three-way valve, 541-Feed connector, 542-Discharge connector, 55-Bolt hole, 6-Dispensing mechanism, 61-Dispensing hopper, 611-Powder inlet, 612-Hinge shaft, 613-Torsion spring, 614-Cover plate, 62-First feeding mechanism, 621-Feeding chamber, 622-Screw feeding mechanism, 63-Second feeder Structure, 64-Stirring mechanism, 641-Stirring motor, 642-Stirring paddle, 6421-Stirring shaft, 6422-Paddle blade, 6423-Connecting rod, 65-Second check valve, 66-T-connector, 7-Feeding pipe, 71-Rotating frame, 72-Bearing, 73-Drive motor, 74-Driving gear, 75-Driven gear, 8-High-pressure gas tank, 81-Electrically controlled valve, 9-Waste collection mechanism, 91-Waste collection bucket, 92-Collection vacuum pump, 93-Filter screen, 10-Cleaning mechanism, 101-First cleaning pipe, 102-Second cleaning pipe, 103-Sponge projectile, 104-Cleaning bucket, 105-Cleaning vacuum pump. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, and not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0022] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0023] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0024] Specific embodiments of the X-ray fluorescence detector calibration device of the present invention: as follows Figure 2-11 As shown, the X-ray fluorescence detector calibration device includes a calibration cup 4 and a calibration plate 5, which can be easily disassembled and transported.

[0025] Among them, such as Figure 1 , 3 As shown, the calibration cup 4 has the same external dimensions as the sample cup, meaning its shape and size are identical, allowing for seamless adaptation of the grippers of the heavy metal rapid detector. A material inlet 41 is located at the bottom axis of the calibration cup 4, with a first one-way valve 42 providing unidirectional upward flow. A rotatable, openable cup lid 43 and an opening / closing mechanism 44 are located at the upper opening of the calibration cup 4. The first one-way valve 42 includes a conical spring, a sealing ball, and a conical surface. The cup lid 43 is sealed to the upper opening of the calibration cup 4 using a sealing gasket. The opening / closing mechanism 44 includes a bracket 442, with the cup lid 43 hinged to it. The hinge shaft 612 is driven to rotate by an opening / closing motor 441.

[0026] The external dimensions of the calibration plate 5, especially the bolt holes 55, are basically the same as those of the sample plate. The calibration plate 5 is provided with a placement groove 51 for placing the calibration cup 4. A top rod 52 protruding upward is provided at the bottom center of the placement groove 51 for inserting into the material port 41 and opening the first one-way valve 42. The outer periphery of the top rod 52 is provided with a mating interface 53 that is coaxial with the material port 41 and has the same diameter. The lower end of the mating interface 53 is connected to a two-position three-way valve 54. The other two ports of the two-position three-way valve 54 are respectively connected to the inlet connector 541 and the outlet connector 542. The two-position three-way valve 54 is a solenoid valve.

[0027] The batching mechanism 6 is located inside the calibration plate 5 and includes a batching tank 61. The batching tank 61 is connected to a first feeding mechanism 62 and a second feeding mechanism 63, which can quantitatively add materials to its inner cavity. A stirring mechanism 64 is also provided inside the batching tank 61. A second one-way valve 65, which is unidirectionally downward-directed, is connected to the outlet of the batching tank 61. A three-way connector 66 is connected to the lower part of the second one-way valve 65. The other two ports of the three-way connector 66 are respectively connected to a high-pressure gas tank 8 and a feeding pipe 7. The other end of the feeding pipe 7 is connected to the inlet connector 541. An electrically controlled valve 81 is provided at the outlet of the high-pressure gas tank 8. The first and second feeding mechanisms 63 include a feeding chamber 621. A spiral feeding mechanism 622 is rotatably mounted in the feeding chamber 621. The spiral feeding mechanism 622 includes a motor, a drive shaft, and spiral blades. The feeding chamber 621 is gradually inclined upwards from the direction away from the powder inlet 611 towards the direction closer to the powder inlet 611. The upper side wall of the mixing tank 61 has two powder inlets 611 communicating with the inside of the mixing tank 61. The first and second feeding mechanisms 63 are respectively connected to the two powder inlets 611. Both the first and second feeding mechanisms 63 include a cylindrical feeding chamber 621, within which a spiral feeding mechanism 622 is installed. Corresponding to the two powder inlets 611, the inner wall of the mixing tank 61 has an arc-shaped cover plate 614 hinged to it via a hinge shaft 612. The cover plate 614 covers the powder inlets 611. A torsion spring 613 is provided at the hinge shaft 612 to provide elastic force for the cover plate 614 to press towards the powder inlets 611. This structure allows for precise addition of both materials. The arc-shaped cover plate 614 design prevents the material in the feeding mechanism from being sucked away when the high-pressure gas tank 8 draws in the prepared sample. The mixing tank 61 has a conical inner cavity that is larger at the top and smaller at the bottom. The stirring mechanism 64 includes a stirring motor 641 and a stirring paddle 642 that are coaxially arranged with the mixing tank 61. The stirring paddle 642 includes a stirring shaft 6421 and blades 6422 that are fitted against the cavity wall of the conical inner cavity. The blades 6422 are connected to the stirring shaft 6421 through a connecting rod 6423.

[0028] The waste collection mechanism 9 includes a waste collection bin 91, the inlet of which is connected to the discharge connector 542, and a collection vacuum pump 92 is provided at the outlet of the waste collection bin 91.

[0029] The feed tubes 7 are rigid tubes, with at least two arranged side-by-side. In this embodiment, there are two tubes, mounted on a rotating frame 71. The rotating frame 71 is driven to rotate by a gear mechanism, so that one of the feed tubes 7 connects with the feed connector 541 and the tee connector 66. The feed tubes 7 also have a cleaning position during rotation with the rotating frame 71. A cleaning mechanism 10 is provided inside the calibration disc 5 corresponding to the cleaning position. The cleaning mechanism 10 includes a first cleaning tube 101 and a second cleaning tube 102, which are respectively connected to both ends of the feed tube 7 in the cleaning position. The first cleaning tube 101 contains a sponge projectile 103, and the other end of the second cleaning tube 102 is connected to a cleaning tank 104. A cleaning vacuum pump 105 is provided at the outlet of the cleaning tank 104. The cleaning mechanism 10, combined with the structure of at least two rigid feed tubes 7, allows the sponge projectile 103 to remove and recover small amounts of sample adhering to the feed tubes 7, preventing subsequent testing of samples of different concentrations from affecting the results. The two end faces of the feed pipe 7 are the first mating planes perpendicular to the axis of the feed pipe 7. The feed connector 541 and the tee connector 66 are mated to the first mating plane through the second mating plane. The first and second cleaning pipes 102 are mated to the first mating plane through the third mating plane. The first, second, and third mating planes are coplanar. The arrangement of the first, second, and third mating planes makes the mating of the feed pipe 7 more convenient when switching between the working position and the cleaning position, and also facilitates sealing. A flat sealing gasket is embedded in the first mating plane to further improve the sealing performance of the mating. The rotating frame 71 is rotatably mounted in the calibration disk 5 through the bearing 72. The gear mechanism includes a drive motor 73, a drive gear 74, and a driven gear 75 fixed on the rotating frame 71.

[0030] Multiple sponge projectiles 103 are installed inside the first cleaning tube 101. Multiple sponge projectiles 103 facilitate sealing and reduce the tediousness of frequently adding sponge projectiles 103 manually. Each cleaning cycle only sucks away one sponge projectile 103. Only after the preceding sponge projectile 103 is removed from the second cleaning tube 102 will the subsequent sponge projectile 103 be attracted and move.

[0031] The waste collection bin 91 and the washing bin 104 are equipped with filter screens 93 at their outlets. This prevents sample powder from being blown out of the outlets, thereby enabling the recovery of sample powder.

[0032] In use, the sample tray on the X-ray fluorescence detector can be removed and replaced with a calibration tray 5 of the same size as the calibration device of this application. The calibration cup 4 is placed in the placement slot 51 of the calibration tray 5, and the cup lid 43 is closed by the opening and closing mechanism 44. The two-position three-way valve 54 is switched to connect with the waste collection mechanism 9, and the waste collection mechanism 9 is started. The vacuum pump 92 is used to evacuate the calibration cup 4. The heavy metal powder to be tested and the starch and other medium powder to be tested are added to the first and second feeding mechanisms 63, respectively. According to the program setting, the first and second feeding mechanisms 63 are controlled to add a certain amount of heavy metal powder and other medium powder to the mixing tank 61, respectively, and the stirring mechanism 64 is used to stir them evenly. The vacuum pump 92 is turned off, and the two-position three-way valve 54 is switched to connect the interface 53 with the feed connector 541. Connect it to the feed pipe 7, open the solenoid valve 81 of the high-pressure gas tank 8, and the high-pressure gas tank 8 sprays high-pressure gas into the three-way connector 66. Due to the setting of the second one-way valve 65, the high-pressure gas will enter the two-position three-way valve 54 along the feed pipe 7, and then enter the calibration cup 4 through the first one-way valve 42. At the same time, the vacuum suction opens the second one-way valve 65 and draws the stirred sample in the mixing tank 61 into the calibration cup 4. After the feeding is completed, close the solenoid valve 81, take out the calibration cup 4 and send it to the test position. The first one-way valve 42 closes automatically. After the test is completed, put it back into the placement tank 51 and repeat the above steps of the waste collection mechanism 9 and the mixing mechanism 6 to extract the sample in the sample cup and return it to the waste collection tank 91. Then send the newly prepared sample into the sample cup for the next test until all sample tests are completed. The proposed solution eliminates the need for multiple sample cups; a single calibration cup 4 can complete more than ten test calibrations. It can also accommodate different samples and concentrations for each test. Furthermore, the entire process requires no manual operation; the test can be completed automatically through a pre-set program, significantly improving automation and testing efficiency.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. An X-ray fluorescence spectrometer calibration device, characterized by, The utility model relates to a kind of calibration device for powder material, including: Calibration cup, the outer dimension is consistent with sample cup, bottom axis is equipped with material port, material port is equipped with first one-way valve that is one-way upwardly communicated, the upper cup mouth of calibration cup is equipped with rotatable open and close cup cover and opening and closing mechanism; Calibration disc is equipped with placement slot, to place calibration cup, the bottom center of placement slot is equipped with upwardly protruding ejector rod, to insert material port and eject first one-way valve, the periphery of ejector rod is equipped with the butt joint of same coaxial diameter with material port, the lower end of butt joint is connected with two-position three-way valve, the other two ports of two-position three-way valve are respectively connected with feed connector and discharge connector; Batching mechanism is located inside calibration disc, including batching barrel, batching barrel is connected with first feeding mechanism and second feeding mechanism that can quantitatively feed into its inner cavity, batching barrel is further equipped with stirring mechanism in, the outlet of batching barrel is connected with second one-way valve that is one-way downwardly communicated, the lower part of second one-way valve is connected with three-way connector, the other two interfaces of three-way connector are respectively connected with high-pressure gas tank and feed pipe, the other end of feed pipe is connected with the feed connector, the gas outlet of high-pressure gas tank is equipped with electric control valve; Waste collection mechanism includes waste collection barrel, the import of waste collection barrel is connected with the discharge connector, and the outlet of waste collection barrel is equipped with collection vacuum pump.

2. The X-ray fluorescence detector calibration device of claim 1, wherein, Feed pipe is hard tube, and at least two are arranged in parallel, installed on rotating frame, rotating frame is driven to rotate by gear mechanism, so that one of feed pipe is connected with feed connector and three-way connector, feed pipe also has cleaning position in the process of rotating with rotating frame, the inside of calibration disc is equipped with cleaning mechanism corresponding to cleaning position, and cleaning mechanism includes first cleaning pipe and second cleaning pipe respectively connected with both ends of feed pipe in cleaning position, sponge projectile is arranged in first cleaning pipe, the other end of second cleaning pipe is connected with cleaning barrel, and the outlet of cleaning barrel is equipped with cleaning vacuum pump.

3. The X-ray fluorescence detector calibration device of claim 2, wherein, A plurality of sponge projectiles are arranged in the first cleaning pipe.

4. The X-ray fluorescence detector calibration device of claim 2, wherein, The end surface of the feed pipe is a first butt joint plane perpendicular to the axis of the feed pipe, the feed connector and the three-way connector are butt jointed with the first butt joint plane through a second butt joint plane, the first and second cleaning pipes are butt jointed with the first butt joint plane through a third butt joint plane, and the first, second and third butt joint planes are coplanar.

5. The X-ray fluorescence detector calibration device of claim 4, wherein, A flat gasket is embedded on the first butt joint plane.

6. The X-ray fluorescence detector calibration device of claim 1, wherein, Two powder inlets are provided on the upper side wall of the batching barrel and communicate with the inside of the batching barrel, the first and second feeding mechanisms are respectively butt jointed with the two powder inlets, the first and second feeding mechanisms each include a cylindrical feeding chamber, a spiral feeding mechanism is installed in the feeding chamber, and an arc-shaped cover plate is hinged on the inner wall of the batching barrel corresponding to the two powder inlets through a hinge shaft, the cover plate is respectively provided at the powder inlet, and a torsional spring is provided at the hinge shaft to provide an elastic force for the cover plate to press towards the powder inlet.

7. The X-ray fluorescence detector calibration device of claim 6, wherein, The axis of the feeding chamber is gradually inclined upward from the powder inlet to the powder inlet.

8. The X-ray fluorescence detector calibration device of claim 2, wherein, The rotating frame is rotatably assembled in the calibration disc through a bearing, and the gear mechanism includes a driving motor, a driving gear and a driven gear fixed on the rotating frame.

9. The X-ray fluorescence detector calibration device of claim 2, wherein, A filter screen is provided at the outlet of the waste collection barrel and the cleaning barrel.

10. The X-ray fluorescence detector calibration device of claim 1, wherein, The ingredient barrel has a conical inner cavity with a large upper part and a small lower part, the stirring mechanism comprises a stirring motor and a stirring paddle coaxially arranged with the ingredient barrel, the stirring paddle comprises a stirring shaft and a paddle blade arranged in close contact with the cavity wall of the conical inner cavity, and the paddle blade is connected with the stirring shaft through a connecting rod.

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