Metal powder detection device

Abstract

The utility model provides a metal powder detection device which comprises a material storage part and a detection part which are vertically arranged at an interval, an outlet of the material storage part is connected with a funnel, and an outlet of the funnel extends to an inlet of the detection part. The detection part comprises a detection box and a sunken detection space, a cylinder is arranged between the material storage part and the detection part, the lower part of the funnel is sleeved with the cylinder, one end of the cylinder is driven to abut against the interior of the detection space, the cylinder is filled with raw materials in the material storage part through the funnel, and the cylinder is driven to move upwards to move out of the detection space. A monitoring part is arranged in the detection space and is used for monitoring the height of the raw materials scattered in the detection space. The detection device further comprises a mounting frame, a connecting frame and a first driving part, and the at least one storage part and the detection part are arranged on the connecting frame. The first driving part drives the storage part and the detection part to exchange up and down positions, and a timer is arranged on the first driving part. According to the utility model, the data accuracy is improved, the repeated manual working time is reduced, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of metal powder detection, and particularly relates to a metal powder detection device. Background Technique

[0002] Flowability is one of the key indicators in 3D printing technology, directly affecting the uniformity of powder spreading and the stability of powder feeding during the printing process. Among the three test points related to flowability, the angle of repose, the outflow velocity, and the compressibility, the angle of repose is the maximum angle formed by the free inclined plane of the powder accumulation layer and the horizontal plane, and is measured when the gravity and the frictional force between particles reach equilibrium and the particles are in a static state while sliding on the free inclined plane of the powder accumulation layer. The outflow velocity is described by the time required for all the materials to flow out after being added to the funnel. The compressibility reflects the cohesiveness and soft state of the powder and is an important indicator of powder flowability.

[0003] Currently, two types of flow meters are often used to measure the flowability of powders: the Hall flowmeter funnel and the Carney funnel. In the actual use process of the detection methods of these two funnels, there are many factors affecting the measurement accuracy, and calibration and improvement need to be carried out repeatedly. Repeated measurements will cause loss of some raw materials, especially for metal powders. Moreover, during the repeated detection process, manual operations are complicated, which is not conducive to improving the work efficiency in the detection work. Content of the Utility Model

[0004] In view of this, the utility model aims to provide a metal powder detection device, which can improve the accuracy of the metal powder flowability test and avoid the loss of raw materials during the detection process.

[0005] To achieve the above object, the technical solution of the utility model is realized as follows:

[0006] A metal powder detection device includes a storage part and a detection part arranged at intervals up and down;

[0007] The outlet of the storage part is connected with a funnel, and the outlet of the funnel extends to the inlet of the detection part;

[0008] The detection part includes a detection box, and an indented detection space is formed in the detection box.

[0009] A cylinder is further arranged between the storage part and the detection part. The cylinder is sleeved on the lower part of the funnel, and one end of the cylinder is driven to press against the detection space. The raw materials in the storage part are filled in the cylinder through the funnel and are moved out of the detection space due to the upward movement of the cylinder being driven.

[0010] A monitoring part that can move in the height direction is arranged in the detection space, and the monitoring part is used to monitor the height of the raw materials scattered in the detection space.

[0011] The detection device further includes a mounting bracket, a connecting bracket pivotally connected to the mounting bracket, and a first driving part for driving the connecting bracket to rotate;

[0012] At least one of the storage parts and the detection part is arranged on the connecting bracket;

[0013] The first driving part drives the upper and lower positions of the storage part and the detection part to be interchanged. The raw material enters the storage part from the detection part via the funnel. A timer is arranged on the first driving part.

[0014] Furthermore, along the length direction of the connecting bracket, a transmission shaft is arranged therethrough, and the transmission shaft is connected to the power output end of the first driving part.

[0015] Furthermore, the connecting bracket includes an upper connecting plate and a lower connecting plate which are arranged at an interval up and down, and a supporting plate arranged between the upper connecting plate and the lower connecting plate;

[0016] The transmission shaft is arranged therethrough along the length direction of the supporting plate.

[0017] Furthermore, a second driving part is arranged on the upper connecting plate. A support plate is connected to the power output end of the second driving part, and the support plate is inserted into the cylinder in the radial direction of the cylinder.

[0018] Furthermore, two oppositely arranged arc plates are arranged in the detection space, and a telescopic disc is arranged on the upper part of each arc plate;

[0019] A third driving part is connected to the detection box, and the power output end of each third driving part is connected to the corresponding arc plate;

[0020] When the second driving part drives the two arc plates to approach each other, a storage space is formed among the two arc plates, the telescopic discs and the bottom wall of the detection box;

[0021] The funnel outlet is communicated with the storage space, and the two telescopic discs abut against the outside of the funnel.

[0022] Furthermore, a guide rail slider assembly is arranged on the inner side of each arc plate. The guide rail slider assembly is arranged along the height direction of the detection space, and the monitoring part is arranged on the slider of the guide rail slider assembly;

[0023] The two monitoring parts adopt a group of laser ranging sensors. A height sensor is arranged on the slider, and the height sensor is used for monitoring the slider and the bottom wall of the detection box.

[0024] Further, the telescopic disc includes a fixing plate connected to the upper end of the arc plate, and a movable plate elastically connected to the fixing plate;

[0025] The movable plate has a notch adapted to the outer shape of the funnel.

[0026] Further, the fixing plate is a semi-circular flat plate, a semi-circular groove is provided on the straight edge of the fixing plate, the movable plate is formed as a semi-circular flat plate, and the extruded part of the movable plate is inserted into the groove;

[0027] At least one elastic member is provided between the movable plate and the fixing plate. When the two movable plates are driven to press against each other, the elastic member is squeezed and stores energy; when the two movable plates move away from each other, the elastic member releases energy so that the notch abuts against the outside of the funnel.

[0028] Further, a blocking plate for blocking the opening is provided at the lower opening of the funnel, a connecting plate is provided on the funnel, and the blocking plate is pivotally connected to the connecting plate;

[0029] A fourth driving part is provided at the upper part of the funnel, the power output end of the fourth driving part moves up and down along the height direction of the funnel, and the fourth driving part drives the blocking plate to pivot relative to the connecting plate so that the opening is blocked or opened.

[0030] Further, an extension plate is provided on one side of the blocking plate, a lengthening rod is connected to the power output end of the fourth driving part, and the lengthening rod is pivotally connected to the extension plate;

[0031] One ends of the two connecting plates are arranged outside the funnel, and the other ends are pivotally connected to both sides of the connecting plate.

[0032] Compared with the prior art, the present utility model has the following advantages:

[0033] For the metal powder detection device of the present utility model, by providing a material storage part, a detection part and a funnel, storing the metal powder to be detected in the material storage part, before detection, first abut the bottom of the cylinder against the detection space, the metal powder enters the cylinder through the funnel, by driving the cylinder out of the detection space, the metal powder is scattered in the detection space in a conical shape, by monitoring the highest point of the conical metal powder by the monitoring part, obtaining the height and the maximum circle diameter of the cone, so as to calculate the angle of repose, which is used as the first evaluation criterion for evaluating the metal powder.

[0034] Secondly, the connecting frame is driven to rotate by the first driving part. The detection part is located above the material storage part. The metal powder as the raw material flows back into the material storage part through the funnel. By means of the timer arranged on the first driving part, the initial time for the raw material to flow into the material storage part can be obtained according to the rotation angle of the first driving part. Then, when it is confirmed that there is no raw material in the detection space, the end time is determined. By calculating the time required for the quantitative metal powder to flow through the inner hole of the funnel, since the metal powder is not taken out and lost, the final metal powder fluidity data is also calculated through the experimental results of two different principles, improving the accuracy of the data and reducing most of the repetitive manual working time, thereby improving the detection efficiency. Description of the Drawings

[0035] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0036] Figure 1 It is a top view schematic diagram of the metal powder detection device according to the embodiment of the present utility model;

[0037] Figure 2 is Figure 1 a cross-sectional schematic diagram at A-A in

[0038] Figure 3 It is a connection schematic diagram of the detection part, the third driving part, and the guide rail slider assembly according to the embodiment of the present utility model;

[0039] Figure 4 is Figure 3 a top view schematic diagram of

[0040] Figure 5 It is a cross-sectional schematic diagram of the telescopic disc according to the embodiment of the present utility model;

[0041] Figure 6 It is a connection schematic diagram of the funnel, the fourth driving part, the extension rod, the plug plate, and the connecting plate according to the embodiment of the present utility model.

[0042] Description of the Reference Numerals:

[0043] 1. Material storage part; 2. Detection part; 3. Funnel; 4. Cylinder; 5. Monitoring part; 6. Mounting frame; 7. Connecting frame; 8. Transmission shaft; 9. First driving part; 10. Second driving part; 11. Support plate; 12. Arc plate; 13. Telescopic disc; 14. Third driving part; 15. Guide rail slider assembly; 16. Laser distance sensor; 17. Height sensor; 18. Fourth driving part; 19. Extension rod; 20. Plug plate; 21. Connecting plate; 22. Extension plate;

[0044] 201. Detection box; 202. Detection space;

[0045] 701. Upper connecting plate; 702. Lower connecting plate; 703. Support plate;

[0046] 1301. Fixed plate; 1302. Movable plate; 1303. Elastic member;

[0047] 1501. Guide rail; 1502. Slide block. Detailed implementation manner

[0048] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0049] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "back", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0050] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", "connecting member" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with specific situations.

[0051] The present utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0052] This embodiment relates to a metal powder detection device. The detection device includes a storage part 1 and a detection part 2 which are arranged at intervals up and down. The outlet of the storage part 1 is connected with a funnel 3, and the outlet of the funnel 3 extends to the inlet of the detection part 2. The detection part 2 includes a detection box 201, and an indented detection space 202 is formed inside the detection box 201. A cylinder 4 is also arranged between the storage part 1 and the detection part 2. The cylinder 4 is sleeved on the lower part of the funnel 3, and one end of the cylinder 4 is driven to press against the detection space 202. The raw materials in the storage part 1 are filled in the cylinder 4 through the funnel 3, and are moved out of the detection space 202 because the cylinder 4 is driven to move upward.

[0053] Among them, a monitoring unit 5 that can move in the height direction is provided in the detection space 202. The monitoring unit 5 is used to monitor the height of the raw materials scattered in the detection space 202. The detection device further includes a mounting frame 6, a connecting frame 7 pivotally connected to the mounting frame 6, and a first driving unit 9 that drives the connecting frame 7 to rotate. At least one storage unit 1 and a detection unit 2 are provided on the connecting frame 7. The first driving unit 9 drives the upper and lower positions of the storage unit 1 and the detection unit 2 to be interchanged. The raw materials enter the storage unit 1 from the detection unit 2 via a funnel 3, and a timer is provided on the first driving unit 9.

[0054] For the metal powder detection device of this embodiment, by providing a storage unit 1, a detection unit 2, and a funnel 3, before detection, the bottom of the cylinder 4 is abutted against the detection space 202, and the metal powder enters the cylinder 4 through the funnel 3. By driving the cylinder 4 out of the detection space 202, the metal powder is scattered in the detection space 202 in a conical shape. The highest point of the conical metal powder is monitored by the monitoring unit 5 to obtain the height and the maximum circle diameter of the cone, so as to calculate the angle of repose, which is used as the first evaluation criterion for evaluating the metal powder.

[0055] Secondly, the connecting frame 7 is driven to rotate by the first driving unit 9, and the detection unit 2 is located above the storage unit 1. The metal powder as the raw material flows back into the storage unit 1 through the funnel 3. By means of the timer provided on the first driving unit 9, the initial time for the raw material to flow into the storage unit 1 can be obtained according to the rotation angle of the first driving unit 9. Then, the end time is determined when it is confirmed that there is no raw material in the detection space 202. By calculating the time required for the quantitative metal powder to flow through the inner hole of the funnel 3, since the metal powder is not taken out and lost, the final metal powder fluidity data is also calculated through the experimental results of two different principles, improving the accuracy of the data and reducing most of the repetitive manual working time, thereby improving the detection efficiency.

[0056] Based on the above overall introduction, an exemplary structure of the metal powder detection device of this embodiment is as Figures 1 to 2 shown. The storage unit 1 and the detection unit 2 are respectively arranged on the connecting frame 7 at intervals. The first driving unit 9 of this embodiment adopts a servo motor. The mounting frame 6 is formed into a U-shaped plate with an upward opening, and the first driving unit 9 is connected to one side of the mounting frame 6.

[0057] The storage unit 1 is a storage box for containing metal powder raw materials. An automatic cut-off valve is provided at the opening of the storage box, which can be used to control the opening and closing of the inlet of the storage box. In this embodiment, a control system is also provided. The control system adopts, for example, PLC control in the prior art. The automatic cut-off valve, the monitoring unit 5, and the timer are all signal-connected to the control system. Each driving unit described in this embodiment is electrically connected to the control system, so as to meet the requirements of automatic detection.

[0058] In order to facilitate obtaining the end time of the raw material flowing into the storage bin, in this embodiment, the storage bin is made of a transparent material, and an infrared sensor can also be arranged at the opening of the storage bin to detect whether an object passes by to determine this end time.

[0059] As Figure 1 and Figure 2 shown, in this embodiment, four storage parts 1 and detection parts 2 are respectively arranged, which can detect metal powder samples of different particles simultaneously, and realize the testing of multiple metal powders in one detection, improving the detection efficiency of the metal powder detection device.

[0060] Preferably, still as Figure 1 and Figure 2 shown, along the length direction of the connecting frame 7, a transmission shaft 8 is arranged through, and the transmission shaft 8 is connected to the power output end of the first driving part 9. The transmission shaft 8 is pivotally connected to the U-shaped plate. Further, the connecting frame 7 includes an upper connecting plate 701 and a lower connecting plate 702 arranged at intervals up and down, and a support plate 703 arranged between the upper connecting plate 701 and the lower connecting plate 702. The transmission shaft 8 is arranged through along the length direction of the support plate 703. The support plate 703, the upper connecting plate 701 and the lower connecting plate 702 form an I-shaped structure, and the transmission shaft 8 passes through the support plate 703.

[0061] As Figure 1 shown, the detection box 201 is a rectangular block connected to the lower connecting plate 702, and a groove with an upward opening is formed inside it. A detection space 202 is formed in the groove. The structure of the funnel 3 is the same as that of the prior art, and its lower end extends into the detection space 202.

[0062] Further, as Figure 1 shown, a second driving part 10 is arranged on the upper connecting plate 701. A support plate 11 is connected to the power output end of the second driving part 10. The support plate 11 is inserted into the cylinder 4 along the radial direction of the cylinder 4. The second driving part 10 adopts a telescopic cylinder. The piston rod of the second driving part 10 is connected to the support plate 11. The support plate 11 is a flat plate structure and is inserted and fixed with the cylinder 4.

[0063] In addition, as Figure 1 、 Figure 3 、 Figure 4 shown, two relatively arranged arc plates 12 are arranged in the detection space 202. A telescopic disc 13 is arranged on the upper part of each arc plate 12. A third driving part 14 is connected to the detection box 201. The power output end of each third driving part 14 is connected to the corresponding arc plate 12. The third driving part 14 in this embodiment adopts a telescopic cylinder and is fixedly connected to both sides of the detection box 201.

[0064] When the second driving part 10 drives the two arc plates 12 to approach each other, a storage space is formed among the two arc plates 12, the telescopic disc 13 and the bottom wall of the detection box 201. The outlet of the funnel 3 is communicated with the storage space, and the two telescopic discs 13 are abutted against the outer side of the funnel 3.

[0065] Furthermore, as Figure 3 shown, a guide rail slider assembly 15 is provided on the inner side of each arc plate 12. The guide rail slider assembly 15 is arranged along the height direction of the detection space 202, and the monitoring part 5 is arranged on the slider 1502 of the guide rail slider assembly 15. Two monitoring parts 5 adopt a group of laser distance sensors 16, and a height sensor 17 is provided on the slider 1502. The height sensor 17 is used to monitor the slider 1502 and the bottom wall of the detection box 201.

[0066] Specifically, a rack is provided between the guide rail slider assemblies 15 of this embodiment. A gear and a motor are provided inside the slider 1502. The motor drives the gear to rotate so that the slider 1502 meshes with the rack on the guide rail 1501, and the slider 1502 moves up and down along the guide rail 1501.

[0067] As a specific implementation manner, as Figures 3 to 5 shown, the telescopic disc 13 includes a fixed plate 1301 connected to the upper end of the arc plate 12, and a movable plate 1302 elastically connected to the fixed plate 1301. The movable plate 1302 has a notch adapted to the outer shape of the funnel 3.

[0068] Still as Figure 5 shown, the fixed plate 1301 is a semi-circular flat plate. A semi-circular groove is provided on the straight edge of the fixed plate 1301. The movable plate 1302 is formed as a semi-circular flat plate, and the extruded part of the movable plate 1302 is inserted into the groove. At least one elastic member 1303 is provided between the movable plate 1302 and the fixed plate 1301. When the two movable plates 1302 are driven to abut, the elastic member 1303 is extruded to store energy; when the two movable plates 1302 move away from each other, the elastic member 1303 releases energy so that the notch abuts against the outer side of the funnel 3. The elastic member 1303 adopts a telescopic spring, one end is connected to the movable plate 1302, and the other end is connected to the groove of the fixed plate 1301.

[0069] In addition, as Figure 1 and Figure 6 shown, a plug plate 20 for blocking the opening is provided at the lower opening of the funnel 3. A connecting plate 21 is provided on the funnel 3, and the plug plate 20 is pivotally connected to the connecting plate 21. A fourth driving part 18 is provided at the upper part of the funnel 3. The power output end of the fourth driving part 18 moves up and down along the height direction of the funnel 3. The fourth driving part 18 drives the plug plate 20 to pivot relative to the connecting plate 21 so that the opening is blocked or opened. The fourth driving part 18 adopts a telescopic cylinder.

[0070] As Figure 6As shown, an extension plate 22 is provided on one side of the plug plate 20. The power output end of the fourth driving part 18 is connected with an extension rod 19, and the extension rod 19 is pivotally connected with the extension plate 22. One ends of two connecting plates 21 are arranged outside the funnel 3, and the other ends are pivotally connected to both sides of the connecting plates 21.

[0071] The implementation process of the metal powder detection device in this embodiment is as follows:

[0072] First, the second driving part 10 drives the cylinder 4 to descend into the detection space 202 and abut against the detection box 201. The automatic cut-off valve located on the storage part 1 is opened, and the metal powder enters the funnel 3. The fourth driving part 18 drives the plug plate 20 to open, and the raw material flows into the cylinder 4. By driving the cylinder 4 to move upward through the second driving part 10, the metal powder forms a cone. At this time, the height and diameter of the conical powder are obtained through the height sensor 17 and the laser distance sensor 16 to obtain the angle of repose. The smaller the angle of repose, the smaller the friction force and the better the fluidity. Generally, it is considered that when θ≤40°, the production fluidity requirements can be met.

[0073] Then, the third driving part 14 drives the two arc plates 12 to approach each other, collects the conical metal powder into the storage space, drives the plug plate 20 to seal the opening of the funnel 3 through the fourth driving part 18, drives the connecting frame 7 to rotate through the first driving part 9, and the detection box 201 is located directly above the storage part 1. When the fourth driving part 18 drives the funnel 3 to open, the timer starts timing. The end time is obtained by observing or detecting through the infrared sensor, and the fluid outflow velocity is obtained by calculation.

[0074] Finally, the two fluidity data are evaluated to obtain the fluidity evaluation result of the metal powder, and the metal powder that does not meet the requirements is reprocessed.

[0075] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A metal powder detection device, characterized in that: It comprises a material storage part (1) and a detection part (2) which are arranged at intervals in an upper and lower manner; The outlet of the material storage part (1) is connected to a funnel (3), and the outlet of the funnel (3) extends to the inlet of the detection part (2); The detection section (2) comprises a detection box (201), wherein a recessed detection space (202) is formed in the detection box (201). A cylinder (4) is further provided between the material storage portion (1) and the detection portion (2); the cylinder (4) is sleeved on the lower portion of the funnel (3), and one end of the cylinder (4) is driven to press against the detection space (202); the raw material in the material storage portion (1) is filled into the cylinder (4) through the funnel (3), and the cylinder (4) is driven to move upward and moves out of the detection space (202); A monitoring unit (5) movable in a height direction is provided in the detection space (202), and the monitoring unit (5) is used to monitor the height of the raw materials scattered in the detection space (202); The detection device further comprises a mounting frame (6), a connecting frame (7) pivotally connected to the mounting frame (6), and a first driving part (9) for driving the connecting frame (7) to rotate; At least one of the material storage part (1) and the detection part (2) is arranged on the connecting frame (7); The first driving part (9) drives the upper and lower positions of the material storage part (1) and the detection part (2) to interchange, and the raw material enters the material storage part (1) from the detection part (2) via the funnel (3). The first driving part (9) is provided with a timer.

2. The metal powder detection device according to claim 1, characterized in that: A transmission shaft (8) is provided along the length direction of the connecting frame (7), and the transmission shaft (8) is connected to the power output end of the first driving part (9).

3. The metal powder detection device according to claim 2, characterized in that: The connecting frame (7) comprises an upper connecting plate (701) and a lower connecting plate (702) which are spaced apart from each other, and a supporting plate (703) arranged between the upper connecting plate (701) and the lower connecting plate (702); The transmission shaft (8) is arranged to penetrate along the length direction of the support plate (703).

4. The metal powder detection device according to claim 3, characterized in that: The upper connecting plate (701) is provided with a second driving part (10), the power output end of the second driving part (10) is connected to a support plate (11), and the support plate (11) is inserted into the cylinder (4) along the radial direction of the cylinder (4).

5. The metal powder detection device according to claim 4, characterized in that: Two arc plates (12) arranged opposite to each other are provided in the detection space (202), and a telescopic disc (13) is provided on the upper part of each arc plate (12); The detection box (201) is connected to a third driving unit (14), and a power output end of each third driving unit (14) is connected to a corresponding arc plate (12); When the second driving part (10) drives the two arc plates (12) to approach each other, a storage space is formed among the two arc plates (12), the telescopic disc (13), and the bottom wall of the detection box (201); The outlet of the funnel (3) is communicated with the storage space, and the two telescopic discs (13) abut against the outer side of the funnel (3).

6. The metal powder detection device according to claim 5, characterized in that: A guide rail slider assembly (15) is arranged on the inner side of each arc plate (12), the guide rail slider assembly (15) is arranged along the height direction of the detection space (202), and the monitoring part (5) is arranged on the slider of the guide rail slider assembly (15); The two monitoring parts (5) adopt a group of laser distance sensors (16), a height sensor (17) is arranged on the slider, and the height sensor (17) is used for monitoring the slider and the bottom wall of the detection box (201).

7. The metal powder detection device according to claim 5, characterized in that: The telescopic disc (13) includes a fixed plate (1301) connected to the upper end of the arc plate (12), and a movable plate (1302) elastically connected to the fixed plate (1301); The movable plate (1302) has a notch adapted to the outer shape of the funnel (3).

8. The metal powder detection device according to claim 7, characterized in that: The fixed plate (1301) is a semi-circular flat plate, a semi-circular groove is provided on the straight edge of the fixed plate (1301), the movable plate (1302) is formed as a semi-circular flat plate, and the extruded part of the movable plate (1302) is inserted into the groove; At least one elastic member (1303) is arranged between the movable plate (1302) and the fixed plate (1301). When the two movable plates (1302) are driven to abut against each other, the elastic member (1303) is extruded to store energy; when the two movable plates (1302) move away from each other, the elastic member (1303) releases energy so that the notch abuts against the outer side of the funnel (3).

9. The metal powder detection device according to claim 1, characterized in that: A plug plate (20) for blocking the opening is provided at the lower opening of the funnel (3), a connecting plate (21) is provided on the funnel (3), and the plug plate (20) is pivotally connected to the connecting plate (21); A fourth driving part (18) is provided at the upper part of the funnel (3), the power output end of the fourth driving part (18) moves up and down along the height direction of the funnel (3), and the fourth driving part (18) drives the plug plate (20) to pivot relative to the connecting plate (21) so that the opening is blocked or opened.

10. The metal powder detection device according to claim 9, characterized in that: An extension plate (22) is provided on one side of the plug plate (20), the power output end of the fourth driving part (18) is connected with an extension rod (19), and the extension rod (19) is pivotally connected to the extension plate (22); One end of each of the two connecting plates (21) is arranged on the outer side of the funnel (3), and the other end is pivotally connected to both sides of the connecting plate (21).

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