Sampling detection device for monitoring loose bulk density of powder on line

Abstract

The utility model discloses a sampling detection device for monitoring loose bulk density of powder on line. The sampling detection device comprises a mounting plate, a linear cylinder, a sampling rod, a rotary cylinder and a weighing instrument, the fixed end of the linear cylinder is connected with the mounting plate; one end of the sampling rod is connected with a sampling part, a sampling groove is formed in the surface of the sampling part, the other end of the sampling rod is rotationally connected with a rotary supporting seat, the sampling rod penetrates through the rotary supporting seat, the rotary supporting seat is connected with the telescopic end of the linear cylinder, and the linear cylinder drives the sampling rod to move through the rotary supporting seat; the rotary cylinder is connected with the rotary supporting seat, and the output end of the rotary cylinder is connected with the sampling rod and drives the sampling rod to rotate; and the mounting plate is arranged at the top of the weighing end of the weighing instrument. The sampling detection device disclosed by the utility model can be used for online sampling and detection, and the detection result is accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, and more specifically to a sampling and detection device for on-line monitoring of the loose bulk density of powder. Background Art

[0002] Selective laser sintering (SLS) forming technology uses the thermal effect of laser to sinter and stack solid powder materials layer by layer, and finally form a part prototype or functional part. The powder materials that are not scanned by the laser during the forming process will not be sintered at high temperature, and these powders are in a loose state and can be reused. Usually, after printing is completed, these used powders are separated and collected, and mixed with new powders that have not been printed according to a certain ratio and screened. The undersize fraction is used as the raw material for the next printing for secondary utilization. Since 3D printing has certain requirements for the particle size of the powder, it is usually necessary to detect the mixed powder to determine whether it meets the requirements for secondary use.

[0003] Regarding whether the mixed powder is qualified, a certain amount is usually taken from the discharged powder, and the bulk density of the material is calculated by measuring the weight and volume to determine whether the powder is qualified. At present, sampling is achieved manually, and the measurement needs to transfer the sample to another weighing instrument for measurement. There is a certain risk of dispersion during the transfer of the material, and at the same time, the powder may be compacted due to vibration or other reasons, resulting in the final measured powder bulk density being the compacted density rather than the required loose bulk density. At the same time, due to the time difference between transfer and external measurement, when the measurement result comes out, the material corresponding to the result may have been used, resulting in the detection result being meaningless.

[0004] Therefore, it is an urgent problem for those skilled in the art to develop a sampling and detection device for on-line monitoring of the loose bulk density of powder that can sample and detect on-line and has accurate detection results. Content of the Utility Model

[0005] In view of this, the utility model provides a sampling and detection device for on-line monitoring of the loose bulk density of powder that can sample and detect on-line and has accurate detection results.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A sampling and detection device for on-line monitoring of the loose bulk density of powder, comprising:

[0008] A mounting plate,

[0009] A linear cylinder, the fixed end of the linear cylinder is connected to the mounting plate;

[0010] Sampling rod, one end of the sampling rod is connected with a sampling part, a sampling groove is formed on the surface of the sampling part, the other end of the sampling rod is rotatably connected with a rotary support seat, the sampling rod penetrates through the rotary support seat, the rotary support seat is connected with the telescopic end of the linear cylinder, and the linear cylinder drives the sampling rod to move through the rotary support seat;

[0011] Rotary cylinder, the rotary cylinder is connected with the rotary support seat, and the output end of the rotary cylinder is connected with the sampling rod and drives the sampling rod to rotate;

[0012] Weighing instrument, the mounting plate is placed on the top of the weighing end of the weighing instrument.

[0013] The beneficial effects of adopting the above technical solutions are that in the present utility model, the linear cylinder drives the sampling rod to move for sampling through the rotary support seat. After the sampling is completed and the sampling rod is driven to move back to the original position, it can be directly weighed by the weighing instrument, which can realize online sampling and detection, with a fast response speed and improved work efficiency.

[0014] Preferably, the sampling and detection device further includes a connecting plate and a protective cylinder; the connecting plate is connected to the bottom of the weighing instrument, the protective cylinder is connected to the connecting plate, and the sampling part of the sampling rod is placed inside the protective cylinder. The connecting plate plays a supporting role for the protective cylinder, and the protective cylinder can prevent powder leakage and pollution.

[0015] Preferably, one end of the protective cylinder away from the rotary cylinder is open and is connected with a docking flange. The docking flange facilitates the connection of the protective cylinder with the flange on the side wall of the mixer or storage bin.

[0016] Preferably, a scraping plate is hinged at the opening of the end of the protective cylinder provided with the docking flange, and the bottom of the scraping plate is flush with the top edge of the sampling groove. The scraping plate scrapes off the excess powder on the top of the sampling groove.

[0017] Preferably, a silica gel gasket is provided at one end of the protective cylinder close to the rotary cylinder, and the sampling rod penetrates through the silica gel gasket. The silica gel gasket plays a sealing role.

[0018] Preferably, on one side of the sampling part where the sampling groove is provided, and at one end close to the silica gel gasket, a boss is provided. The setting of the boss can lift the scraping plate to prevent the scraping plate from affecting the rotation of the sampling part.

[0019] Preferably, a bearing is arranged inside the rotary support seat, and the sampling rod penetrates through the inner ring of the bearing.

[0020] Preferably, a guide rail is slidably connected to the bottom of the rotary support seat, and the guide rail is connected to the mounting plate. The guide rail can play a role in limiting the movement of the rotary support seat.

[0021] Preferably, a jet nozzle is provided at the bottom of the silica gel gasket, and the jet nozzle blows air into the protective cylinder through the silica gel gasket. The jet nozzle can clean the area inside the protective cylinder when the material is poured back into the storage bin during retraction, preventing the material from getting stuck as it enters with the sampling rod.

[0022] Through the above technical solutions, compared with the prior art, the present invention discloses a sampling and detection device for on-line monitoring of the loose bulk density of powder, and its beneficial effects are as follows:

[0023] (1) The sampling and detection device in the present invention can realize on-line sampling and detection, real-time monitoring of the loose bulk density of the powder in the silo, with a fast response speed and high work efficiency;

[0024] (2) It can realize continuous sampling and detection, and the detected powder is directly sent back into the silo, and the next sampling can be carried out without additional treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0026] Figure 1 It is a schematic structural diagram of the sampling and detection device provided by the present invention;

[0027] Figure 2 It is the front view of the sampling and detection device provided by the present invention;

[0028] Figure 3 It is the top view of the sampling and detection device provided by the present invention;

[0029] Figure 4 It is provided by the present invention Figure 3 The cross-sectional view at A-A in

[0030] Among them, in the figure,

[0031] 1 - mounting plate; 2 - linear cylinder;

[0032] 3 - sampling rod;

[0033] 31 - sampling part; 32 - sampling groove; 33 - boss;

[0034] 4 - Rotary cylinder; 5 - Weighing instrument; 6 - Connecting plate; 7 - Protective cylinder; 8 - Docking flange; 9 - Scraping plate; 10 - Silicone gasket; 11 - Rotary support seat; 12 - Bearing; 13 - Guide rail; 14 - Jet nozzle. Detailed implementation manners

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] An embodiment of the present invention discloses a sampling and detection device for on - line monitoring of the loose bulk density of powder, including:

[0037] Mounting plate 1,

[0038] Linear cylinder 2, the fixed end of the linear cylinder 2 is connected to the mounting plate 1;

[0039] Sampling rod 3, one end of the sampling rod 3 is connected with a sampling part 31, a sampling groove 32 is arranged on the surface of the sampling part 31, the other end of the sampling rod 3 is rotatably connected with a rotary support seat 11, the sampling rod 3 penetrates through the rotary support seat 11, the rotary support seat 11 is connected with the telescopic end of the linear cylinder 2, and the linear cylinder 2 drives the sampling rod 3 to move through the rotary support seat 11;

[0040] Rotary cylinder 4, the rotary cylinder 4 is connected with the rotary support seat 11, and the output end of the rotary cylinder 4 is connected with the sampling rod 3 and drives the sampling rod 3 to rotate;

[0041] Weighing instrument 5, the mounting plate 1 is placed on the top of the weighing end of the weighing instrument 5. The weighing instrument 5 can weigh the weights of the mounting plate 1, the linear cylinder 2, the rotary cylinder 4, the sampling rod 3, the rotary support seat 11 and the guide rail 13, and take this weight as the basic weight during detection. The weight of the taken material can be measured through the weight difference before and after sampling. The loose bulk density of the material can be calculated through the volume of the sampling groove 32 and the weight of the taken material, and the real-time detection of the material can be realized. The detection data is fed back to the control system to determine whether the current batch of mixed powder is qualified. If it is unqualified, corresponding solutions can be taken in time, which can improve the response speed and work efficiency.

[0042] To further optimize the above technical solution, the sampling and detection device further includes a connecting plate 6 and a protective cylinder 7; the connecting plate 6 is connected to the bottom of the weighing instrument 5, the protective cylinder 7 is connected to the connecting plate 6, and the sampling part 31 of the sampling rod 3 is placed inside the protective cylinder 7.

[0043] To further optimize the above technical solution, one end of the protective cylinder 7 away from the rotary cylinder 4 is open and is connected with a docking flange 8.

[0044] To further optimize the above technical solution, a scraping plate 9 is hinged at the opening of the end of the protective cylinder 7 where the docking flange 8 is provided, and the bottom of the scraping plate 9 is flush with the top edge of the sampling groove 32.

[0045] To further optimize the above technical solution, a silica gel gasket 10 is provided at the end of the protective cylinder 7 close to the rotary cylinder 4, and the sampling rod 3 penetrates through the silica gel gasket 10. The silica gel gasket 10 can not only play a sealing role but also isolate the weight, so that the weighing instrument 5 does not weigh the weights of the connecting plate 6 and the protective cylinder 7 during weighing.

[0046] To further optimize the above technical solution, on one side of the sampling part 31 where the sampling groove 32 is provided, a boss 33 is provided at the end close to the silica gel gasket 10.

[0047] To further optimize the above technical solution, a bearing 12 is arranged inside the rotary support base 11, and the sampling rod 3 penetrates through the inner ring of the bearing 12.

[0048] To further optimize the above technical solution, as Figure 4 shown, a rotating shaft is provided at the rotating output end of the rotary cylinder 4. The rotating shaft extends into the sampling rod 3 and can drive the sampling rod 3 to rotate through key connection.

[0049] To further optimize the above technical solution, a guide rail 13 is slidably connected to the bottom of the rotary support base 11, and the guide rail 13 is connected to the mounting plate 1.

[0050] To further optimize the above technical solution, an air jet nozzle 14 is provided at the bottom of the silica gel gasket 10. The air jet nozzle 14 blows air into the protective cylinder 7 through the silica gel gasket 10.

[0051] Working principle:

[0052] The installation of the device can be completed by docking the docking flange 8 on the protective cylinder 7 with the matching flange on the side wall of the mixer or the storage bin. When sampling and detection are required, the linear cylinder 2 pushes the sampling rod 3 into the bin through the rotary support base 11. The powder in the bin falls into the sampling groove 32 on the sampling rod 3. The linear cylinder 2 retracts the sampling rod 3 through the rotary support base 11, and the excess material on the sampling rod 3 is scraped back into the bin by the scraping plate 9. At this time, the sampling rod 3 is no longer in contact with the material in the bin, and the weighing instrument 5 at the bottom can start measuring the increased weight (i.e., the increased powder weight in the sampling groove 32). Since the volume of the sampling groove 32 is fixed, the loose bulk density of the powder can be calculated based on the powder weight and volume in the sampling groove 32. When the measurement is completed, the linear cylinder 2 pushes the sampling rod 3 back into the bin through the rotary support base 11. Under the action of the rotary cylinder 4, the sampling rod 3 rotates 180°, and the sampling groove 32 dumps the material back into the bin. Then the linear cylinder 2 operates to withdraw the sampling rod 3 from the bin through the rotary support base 11. At the same time, a jet nozzle 14 is installed at the bottom of the silicone gasket 10. When the sampling rod 3 retracts, compressed air starts to clean the area inside the protective cylinder 7 to prevent the material from entering and causing jamming. The scraping plate 9 is fixed to the docking flange 8 through a movable hinge. When the sampling rod 3 retracts, the scraping plate 9 scrapes the excess powder along the upper edge of the sampling groove 32 and drops it into the bin. When the sampling rod 3 extends into the bin, the scraping plate 9 can be lifted by its own boss 33 so that the rotation of the sampling rod 3 is not affected.

[0053] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.

[0054] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An on-line sampling and detection device for monitoring the loose bulk density of powder, characterized in that Comprising: Mounting plate (1), Linear cylinder (2), the fixed end of the linear cylinder (2) is connected to the mounting plate (1); Sampling rod (3), one end of the sampling rod (3) is connected with a sampling part (31), a sampling groove (32) is formed on the surface of the sampling part (31), the other end of the sampling rod (3) is rotatably connected with a rotating support seat (11), the sampling rod (3) penetrates through the rotating support seat (11), the rotating support seat (11) is connected with the telescopic end of the linear cylinder (2), and the linear cylinder (2) drives the sampling rod (3) to move through the rotating support seat (11); Rotary cylinder (4), the rotary cylinder (4) is connected with the rotating support seat (11), and the output end of the rotary cylinder (4) is connected with the sampling rod (3) and drives the sampling rod (3) to rotate; Weighing instrument (5), the mounting plate (1) is placed on the top of the weighing end of the weighing instrument (5).

2. The sampling and detection device for on-line monitoring of the loose bulk density of powder according to claim 1, characterized in that, The sampling and detecting device further comprises a connecting plate (6) and a protective cylinder (7); the connecting plate (6) is connected to the bottom of the weighing instrument (5), the protective cylinder (7) is connected to the connecting plate (6), and the sampling part (31) of the sampling rod (3) is placed inside the protective cylinder (7).

3. The sampling and detection device for online monitoring of the loose bulk density of powder according to claim 2, characterized in that, One end of the protective cylinder (7) away from the rotary cylinder (4) is open and is connected with a docking flange (8).

4. The sampling and detection device for online monitoring of the loose bulk density of powder according to claim 3, wherein, A scraping plate (9) is hinged at the opening of the end of the protective cylinder (7) provided with the docking flange (8), and the bottom of the scraping plate (9) is flush with the top edge of the sampling groove (32).

5. The sampling and detection device for on-line monitoring of the loose bulk density of powder according to claim 2, characterized in that, A silica gel gasket (10) is arranged at one end of the protective cylinder (7) close to the rotary cylinder (4), and the sampling rod (3) penetrates through the silica gel gasket (10).

6. The sampling and detection device for online monitoring of the loose bulk density of powder according to claim 5, characterized in that, On one side of the sampling part (31) provided with the sampling groove (32) and close to one end of the silica gel gasket (10), a boss (33) is arranged.

7. The sampling and detection device for online monitoring of the loose bulk density of powder according to claim 1, characterized in that, A bearing (12) is arranged inside the rotating support seat (11), and the sampling rod (3) penetrates through the inner ring of the bearing (12).

8. The sampling and detection device for online monitoring of the loose bulk density of powder according to claim 7, characterized in that, The bottom of the rotating support seat (11) is slidably connected with a guide rail (13), and the guide rail (13) is connected to the mounting plate (1).

9. The sampling and detection device for online monitoring of the loose bulk density of powder according to claim 5, characterized in that, A jet nozzle (14) is arranged at the bottom of the silica gel gasket (10), and the jet nozzle (14) blows air into the protective cylinder (7) through the silica gel gasket (10).

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