A sampling device for detecting carbon content in cemented carbide powder

Abstract

The present invention relates to a sampling device for detecting the carbon content of cemented carbide powder, which is applied to the field of carbon content detection. The device comprises a base, the top of the base is fixedly connected to an infrared analyzer and a side frame, and the top of the side frame is fixedly connected to a bracket. The present invention can transfer samples or additives in parallel by setting a suction net, so that the samples or additives can be spread flat in a crucible for combustion, thereby preventing the samples from being insufficiently burned and affecting the accuracy of the results. Furthermore, by setting a mixed vibration base and a homogenous vibration base and other devices, three transfer modes of layering, wrapping and mixing of samples and additives can be realized, which adapts to different particle sizes and combustion requirements, makes the samples more fully burned, and improves the accuracy of the detection results. Furthermore, by setting a decomposition net, in the process of transferring the samples or additives, the phenomenon of residual samples or additives during the transfer process can be avoided, thereby further improving the accuracy of the detection results.

Description

Technical Field

[0001] The invention relates to a detection sampling device, in particular to a hard alloy powder carbon content detection sampling device applied in the field of carbon content detection. Background Art

[0002] The alloy powder infrared carbon content analyzer is a high-precision analytical device used to determine the carbon content in alloy powder. The instrument usually uses the combustion-infrared absorption method: the sample is burned at high temperature, and the released carbon dioxide gas is detected by the infrared sensor, thereby calculating the carbon content. It is widely used in quality control and research and analysis in the fields of metallurgy, powder metallurgy, and new materials.

[0003] Chinese patent application publication number CN118980661A discloses a method for determining carbon content using a high-frequency infrared carbon-sulfur analyzer. Before testing, a sample and an additive are mixed and burned in a guide tube to release carbon dioxide. Chinese patent application publication number CN116793987A discloses a method for determining the carbon content in ultra-low carbon steel using an infrared carbon-sulfur analyzer. Tungsten particles are added to the sample and burned in a crucible, and the carbon content of the sample is calculated based on the carbon dioxide generated during combustion.

[0004] From the above, we can see that whether the sample burns sufficiently or not greatly affects the accuracy of the test results, and the uniformity of the additives and samples affects whether the sample burns sufficiently. When the sample is placed in the crucible, it needs to be spread evenly.

[0005] Currently, samples and additives are generally mixed, but the mixing method is single and cannot be applied to samples of different diameters. Moreover, it is not convenient to spread the mixed samples flat inside the crucible, which requires further improvement. Summary of the Invention

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that currently, samples and additives are generally mixed, and the mixing method is single and cannot be applied to samples of different diameters.

[0007] In order to solve the above problems, the present invention provides a cemented carbide powder carbon content detection and sampling device, comprising a base, the top of the base is fixedly connected to an infrared analyzer and a side frame, the top of the side frame is fixedly connected to a bracket, two sliding rods are fixedly connected between the bracket and the side frame, a connecting block is slidably connected between the two sliding rods, one end of the bracket is fixedly connected to a driving motor, the output end of the driving motor is fixedly connected to a screw rod, one end of the screw rod passes through the connecting block and is threadedly connected thereto, one end of the connecting block is fixedly connected to an electric telescopic rod, the output end of the electric telescopic rod is fixedly connected to an installation box, the inner wall of the installation box is fixedly connected to a fan, and the installation box is fixedly connected to the inner wall of the installation box. The bottom end of the box is fixedly connected with an exhaust pipe and an exhaust pipe, the two ends of the fan are respectively connected with the exhaust pipe and the exhaust pipe, one end of the exhaust pipe is connected with a negative pressure hood, the inner wall of the open end of the negative pressure hood is fixedly connected with an air uniformity plate and a suction net, the air uniformity plate is located on the outside of the suction net, the middle part of the base is fixedly connected with a mixed vibration seat and a uniform vibration seat, the tops of the mixed vibration seat and the uniform vibration seat are fixedly connected with a clamp, a combustion furnace is provided inside the infrared analyzer, the bottom end of the infrared analyzer is fixedly connected with a first feeding push rod, the output end of the first feeding push rod is fixedly connected with a first storage platform, and also includes a crucible and a leveling pot.

[0008] As a further improvement of the present application, the exhaust pipe and the negative pressure hood are connected by a rubber tube, and a plurality of material shaking vibrators are fixedly connected to the top of the negative pressure hood.

[0009] As a further improvement of the present application, the electric telescopic rod and the mounting box are fixedly connected by a frame, a rotating shaft is rotatably connected between the frame and the mounting box, a rotating motor is fixedly connected to the side wall of the frame, and the output end of the rotating motor is fixedly connected to one end of the rotating shaft.

[0010] As a further improvement of the present application, a decomposition net matching the suction net is also included, and the decomposition net is set to be a polyvinyl alcohol material.

[0011] As another improvement of the present application, the middle part of the base is fixedly connected to a pre-processing seat, one end of the pre-processing seat is fixedly connected to a second feeding push rod, and the output end of the second feeding push rod is fixedly connected to a second storage platform and a sealing plate.

[0012] As another improved supplement to the present application, the other end of the pre-treatment seat is fixedly connected to a high-temperature decomposition furnace, a door opening matching the sealing plate is opened on one side of the high-temperature decomposition furnace, a heating wire is fixedly connected to the inside of the high-temperature decomposition furnace, an inert gas cylinder is fixedly connected to the top of the high-temperature decomposition furnace, and one end of the inert gas cylinder is connected to the high-temperature decomposition furnace.

[0013] As another improved supplement of the present application, the decomposition network is configured as a multi-layer network structure.

[0014] As another improvement of the present application, the leveling pot includes a material tube, the inner wall of the material tube is fixedly connected to a ventilation net, and the bottom end of the material tube is provided with a plurality of evenly distributed air inlet holes, which are located on the lower side of the ventilation net.

[0015] In summary, the present invention can transfer the sample or additive in parallel by setting the suction net, so that the sample or additive can be spread flat in the crucible and burned, thereby preventing the sample from being burned incompletely and affecting the accuracy of the results;

[0016] The hybrid setting of the mixing vibration base and the homogenizing vibration base can realize three transfer modes of sample and additive: layering, wrapping and mixing, which can adapt to different particle sizes and combustion requirements, make the sample more fully burned, and improve the accuracy of the test results.

[0017] Furthermore, by setting up the decomposition net, the phenomenon of sample or auxiliary agent residue can be avoided during the transfer process, thereby further improving the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is an overall front view of the first and second embodiments of the present application;

[0019] Figure 2 This is a front cross-sectional view of the installation box in the first and second embodiments of the present application;

[0020] Figure 3 This is a front cross-sectional view of the negative pressure cover in the first and second embodiments of the present application;

[0021] Figure 4 This is a front cross-sectional view of the crucible in the first and second embodiments of the present application;

[0022] Figure 5 This is a front cross-sectional view of the leveling pot in the first and second embodiments of the present application;

[0023] Figure 6 This is a state diagram of the negative pressure cover being located inside the material pipe in the first and second embodiments of the present application;

[0024] Figure 7 This is a state diagram of the sample when the auxiliary agent is wrapped in the first and second embodiments of the present application;

[0025] Figure 8 This is a side view of the installation box in the second embodiment of the present application;

[0026] Figure 9 This is a front cross-sectional view of the high-temperature decomposition furnace in the second embodiment of the present application.

[0027] Description of the numbers in the figure:

[0028] 1. Base; 2. Infrared analyzer; 201. Combustion furnace; 3. Side frame; 4. Bracket; 5. Sliding rod; 6. Connecting block; 7. Drive motor; 8. Screw; 9. Electric telescopic rod; 10. Installation box; 11. Fan; 12. Exhaust pipe; 13. Suction pipe; 14. Negative pressure cover; 15. Air uniformity plate; 16. Suction net; 17. Mixing vibration seat; 18. Uniform vibration seat; 19. Clamp; 20. First feeding push rod; 21. First storage Platform; 22. Crucible; 23. Leveling pot; 2301. Material tube; 2302. Ventilation net; 2303. Air inlet; 24. Frame; 25. Rotating shaft; 26. Rotating motor; 27. Decomposition net; 28. Pre-treatment seat; 29. Second feeding push rod; 30. Second storage platform; 31. Closing plate; 32. High-temperature decomposition furnace; 33. Door opening; 34. Heating wire; 35. Inert gas cylinder; 36. Rubber tube; 37. Material shaking vibrator. DETAILED DESCRIPTION

[0029] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0030] The first implementation method:

[0031] Figure 1-Figure 7 The present invention shows a device for detecting and sampling the carbon content of cemented carbide powder, comprising a base 1, wherein the top of the base 1 is fixedly connected to an infrared analyzer 2 and a side frame 3, the top of the side frame 3 is fixedly connected to a bracket 4, two slide rods 5 are fixedly connected between the bracket 4 and the side frame 3, a connecting block 6 is slidably connected between the two slide rods 5, one end of the bracket 4 is fixedly connected to a drive motor 7, the output end of the drive motor 7 is fixedly connected to a screw rod 8, one end of the screw rod 8 passes through the connecting block 6 and is threadedly connected thereto, one end of the connecting block 6 is fixedly connected to an electric telescopic rod 9, the output end of the electric telescopic rod 9 is fixedly connected to an installation box 10, the inner wall of the installation box 10 is fixedly connected to a fan 11, and the bottom end of the installation box 10 is fixedly connected to an exhaust pipe 12 and a suction pipe 13. The air pipe 13 and the two ends of the fan 11 are respectively connected to the exhaust pipe 12 and the exhaust pipe 13. One end of the exhaust pipe 13 is connected to the negative pressure cover 14. The inner wall of the open end of the negative pressure cover 14 is fixedly connected with a uniform wind plate 15 and a suction net 16. The uniform wind plate 15 is located on the outside of the suction net 16. The middle part of the base 1 is fixedly connected with a mixed vibration seat 17 and a uniform vibration seat 18. The tops of the mixed vibration seat 17 and the uniform vibration seat 18 are fixedly connected with a clamp 19. A combustion furnace 201 is provided inside the infrared analyzer 2. The bottom end of the infrared analyzer 2 is fixedly connected with a first feeding push rod 20. The output end of the first feeding push rod 20 is fixedly connected with a first storage platform 21. It also includes a crucible 22 and a leveling pot 23.

[0032] Before the test, the crucible 22 and the leveling pot 23 are placed on the mixing vibration seat 17 and the uniform vibration seat 18 respectively and fixed by the clamp 19, then the auxiliary agent is weighed and placed inside the leveling pot 23, the uniform vibration seat 18 is started to drive the leveling pot 23 to vibrate, so that the auxiliary agent inside the leveling pot 23 is spread flat on its bottom end, and then the negative pressure cover 14 is driven to move by the driving motor 7 and the electric telescopic rod 9 until the suction net 16 is in contact with the auxiliary agent, and the fan 11 is started to make the interior of the negative pressure cover 14 a negative pressure state, so that the suction net 16 can absorb the auxiliary agent inside the leveling pot 23, and then the negative pressure cover 14 is moved to the inside of the crucible 22, and the installation box 10 is closed to restore the interior of the negative pressure cover 14 to normal pressure, so that the auxiliary agent on the surface of the suction net 16 falls into the inside of the crucible 22. Similarly, the sample is weighed and placed inside the leveling pot 23, and the sample is transferred to the inside of the crucible 22 through the suction net 16.

[0033] Through the above arrangement, the sample or the auxiliary agent can be transferred into the crucible 22 in a layered distribution form.

[0034] The layered distribution of samples and additives can be suitable for different application scenarios. For example, when the sample diameter is small, the sample may fly during the heating process. In this case, the sample layer can be placed on the upper side of the additive layer. In this case, the additive layer can protect the sample layer and prevent the flying sample from affecting the measurement results.

[0035] For another example, when the diameter of the sample is large, a structure in which two layers of additives wrap one layer of sample can be adopted, so that the sample layer in the central area can be better heated and avoid incomplete combustion of the sample.

[0036] For another example, when an additive and a sample need to be mixed and burned, the sample and the additive are arranged in two layers and distributed according to the diameters of the additive and the sample. The sample or additive with a large diameter is placed under the sample or additive with a small diameter, and then the mixing vibration seat 17 is started to drive the crucible 22 to vibrate. Under the action of the "Brazil nut effect", the one with a small diameter moves downward and the one with a large diameter moves upward. By controlling the vibration time of the mixing vibration seat 17, the sample and the additive can be mixed together, so that the sample can be better burned with the assistance of the additive.

[0037] The above-mentioned setting enables the additives and samples to be burned in different arrangements, which is more suitable for different application scenarios and greatly improves the accuracy of the detection effect.

[0038] After the sample and the additive are mixed inside the crucible 22, the crucible 22 is removed from the mixing vibration seat 17 and placed on the first storage platform 21. The first feeding push rod 20 drives the crucible 22 into the interior of the combustion furnace 201 for combustion. When the sample burns, the carbon inside it is oxidized into carbon dioxide and sent to the infrared detection unit. Infrared absorption detects the carbon dioxide concentration and converts it into carbon content.

[0039] The exhaust pipe 13 and the negative pressure cover 14 are connected through a rubber tube 36 , and a plurality of material shaking vibrators 37 are fixedly connected to the top of the negative pressure cover 14 .

[0040] With the above arrangement, when the sample or the auxiliary agent is discharged from the suction net 16 , the decomposition net 27 can drive the suction net 16 to vibrate, thereby avoiding the residue of the auxiliary agent or the sample on the suction net 16 .

[0041] The leveling pot 23 includes a material tube 2301 , the inner wall of which is fixedly connected to a ventilation net 2302 , and a plurality of evenly distributed air inlet holes 2303 are formed at the bottom end of the material tube 2301 , which are located on the lower side of the ventilation net 2302 .

[0042] Through the above-mentioned arrangement, the additive or sample is placed on the surface of the ventilation net 2302. When the suction net 16 absorbs the sample or additive, the gas will enter the interior of the material tube 2301 through the air inlet 2303 and flow upward through the ventilation net 2302. At this time, the sample or additive on the surface of the ventilation net 2302 can be better adsorbed on the suction net 16, avoiding residue on the ventilation net 2302, thereby further improving the accuracy of the test results.

[0043] Second implementation method:

[0044] Figures 1-9 A device for detecting and sampling the carbon content of cemented carbide powder is shown. Unlike the first embodiment, the electric telescopic rod 9 and the installation box 10 are fixedly connected by a frame 24. A rotating shaft 25 is rotatably connected between the frame 24 and the installation box 10. A rotating motor 26 is fixedly connected to the side wall of the frame 24. The output end of the rotating motor 26 is fixedly connected to one end of the rotating shaft 25. A decomposition net 27 that matches the suction net 16 is also included. The decomposition net 27 is set to polyvinyl alcohol material. The middle part of the base 1 is fixedly connected to the pre-processing seat 2 8. One end of the pre-processing seat 28 is fixedly connected to the second feeding push rod 29, and the output end of the second feeding push rod 29 is fixedly connected to the second storage platform 30 and the sealing plate 31. The other end of the pre-processing seat 28 is fixedly connected to the high-temperature decomposition furnace 32. A door opening 33 matching the sealing plate 31 is provided on one side of the high-temperature decomposition furnace 32. A heating wire 34 is fixedly connected to the inside of the high-temperature decomposition furnace 32. An inert gas cylinder 35 is fixedly connected to the top of the high-temperature decomposition furnace 32, and one end of the inert gas cylinder 35 is connected to the high-temperature decomposition furnace 32.

[0045] When transferring a sample with a smaller diameter into the crucible 22 , the sample may get stuck in the suction net 16 , resulting in the sample being unable to be completely discharged from the suction net 16 , thereby affecting the test results.

[0046] Through the above arrangement, before the suction net 16 absorbs the sample, the decomposition net 27 can be placed on the suction net 16, and then the sample is adsorbed. In this way, the sample is adsorbed on the decomposition net 27, and then the rotary motor 26 is started to drive the installation box 10 to rotate so that the decomposition net 27 is horizontally facing upward. The decomposition net 27 is manually separated from the suction net 16, and the decomposition net 27 containing the sample is placed inside the crucible 22. Similarly, the decomposition net 27 containing the auxiliary agent can also be placed inside the crucible 22.

[0047] Then place the crucible 22 on the second storage platform 30, start the second feeding push rod 29 to move the crucible 22 to the inside of the high-temperature decomposition furnace 32, and release inert gas into the inside of the high-temperature decomposition furnace 32 through the inert gas bottle 35. The inert gas can be nitrogen. Then start the heating wire 34 and heat it to 250-350 degrees. At this temperature, polyvinyl alcohol is pyrolyzed into water vapor and slightly volatile substances. Then take out the crucible 22 and put it into the interior of the combustion furnace 201 for testing. Because there is no oxygen inside the high-temperature decomposition furnace 32, the carbon component of the sample will not be oxidized, and will not affect subsequent testing. The above setting can enable the sample or auxiliary agent to be transferred without loss during the transfer process, further improving the test results.

[0048] Polyvinyl chloride can also be replaced by other similar materials, which need to have the following characteristics: the temperature during decomposition will not affect the performance and carbon content of the sample or additive, and there will be no residue after decomposition or the residual material will not affect the combustion of the additive or sample.

[0049] The decomposition net 27 is set to a multi-layer mesh structure. Through the above setting, when the decomposition net 27 adsorbs the sample or auxiliary agent, the sample or auxiliary agent can be adsorbed inside the decomposition net 27, which can fix the sample or auxiliary agent and prevent the sample or auxiliary agent from falling off when it is transferred with the decomposition net 27.

[0050] In view of current actual needs, the protection scope of the above-mentioned implementation mode adopted in this application is not limited to this. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. A sampling device for detecting carbon content in cemented carbide powder, comprising a base (1), characterized in that: The top of the base (1) is fixedly connected to an infrared analyzer (2) and a side frame (3), the top of the side frame (3) is fixedly connected to a bracket (4), two sliding rods (5) are fixedly connected between the bracket (4) and the side frame (3), a connecting block (6) is slidably connected between the two sliding rods (5), one end of the bracket (4) is fixedly connected to a driving motor (7), the output end of the driving motor (7) is fixedly connected to a screw rod (8), one end of the screw rod (8) passes through the connecting block (6) and is threadedly connected thereto, one end of the connecting block (6) is fixedly connected to an electric telescopic rod (9), the output end of the electric telescopic rod (9) is fixedly connected to an installation box (10), the inner wall of the installation box (10) is fixedly connected to a fan (11), the bottom end of the installation box (10) is fixedly connected to an exhaust pipe (12) and an exhaust pipe (13), the fan (1 The two ends of the base (1) are respectively connected to the exhaust pipe (12) and the exhaust pipe (13), one end of the exhaust pipe (13) is connected to the negative pressure cover (14), the inner wall of the open end of the negative pressure cover (14) is fixedly connected to the uniform wind plate (15) and the suction net (16), the uniform wind plate (15) is located on the outside of the suction net (16), the middle part of the base (1) is fixedly connected to the mixed vibration seat (17) and the uniform vibration seat (18), the top of the mixed vibration seat (17) and the uniform vibration seat (18) are fixedly connected to the clamp (19), the interior of the infrared analyzer (2) is provided with a combustion furnace (201), the bottom end of the infrared analyzer (2) is fixedly connected to the first feeding push rod (20), the output end of the first feeding push rod (20) is fixedly connected to the first storage platform (21), and the device also includes a crucible (22) and a leveling pot (23).

2. A cemented carbide powder carbon content detection and sampling device according to claim 1, characterized in that: The exhaust pipe (13) and the negative pressure cover (14) are connected via a rubber tube (36), and a plurality of material shaking vibrators (37) are fixedly connected to the top end of the negative pressure cover (14).

3. The device for detecting and sampling carbon content in cemented carbide powder according to claim 1, wherein: The electric telescopic rod (9) and the installation box (10) are fixedly connected via a frame (24); a rotating shaft (25) is rotatably connected between the frame (24) and the installation box (10); a rotating motor (26) is fixedly connected to a side wall of the frame (24); and an output end of the rotating motor (26) is fixedly connected to one end of the rotating shaft (25).

4. A cemented carbide powder carbon content detection and sampling device according to claim 3, characterized in that: It also includes a decomposition net (27) that matches the suction net (16), and the decomposition net (27) is configured to be a polyvinyl alcohol material.

5. The device for detecting and sampling carbon content in cemented carbide powder according to claim 4, characterized in that: The middle of the base (1) is fixedly connected to a pre-processing seat (28), one end of the pre-processing seat (28) is fixedly connected to a second feeding push rod (29), and the output end of the second feeding push rod (29) is fixedly connected to a second storage platform (30) and a sealing plate (31).

6. The device for detecting and sampling carbon content in cemented carbide powder according to claim 5, characterized in that: The other end of the pre-treatment seat (28) is fixedly connected to a high-temperature decomposition furnace (32), and a door opening (33) matching the sealing plate (31) is opened on one side of the high-temperature decomposition furnace (32). A heating wire (34) is fixedly connected to the interior of the high-temperature decomposition furnace (32), and an inert gas cylinder (35) is fixedly connected to the top of the high-temperature decomposition furnace (32), and one end of the inert gas cylinder (35) is connected to the high-temperature decomposition furnace (32).

7. A cemented carbide powder carbon content detection and sampling device according to claim 6, characterized in that: The decomposition net (27) is configured as a multi-layered net structure.

8. The device for detecting and sampling carbon content in cemented carbide powder according to claim 1, characterized in that: The leveling pot (23) comprises a material tube (2301), the inner wall of the material tube (2301) is fixedly connected to a ventilation net (2302), and the bottom end of the material tube (2301) is provided with a plurality of evenly distributed air inlet holes (2303), and the air inlet holes (2303) are located on the lower side of the ventilation net (2302).

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