Sampling device, sampling probe and sampling method

Abstract

The invention discloses a sampling device. The sampling device comprises two sample molds and a flow guide pipe, an opening concave cavity is formed in the inner side surface of each sample mold, and the inner side surfaces of the two sample molds are relatively closed to form the sampling device with a cavity; a groove is formed in the outer side surface of the sample mold; a through hole communicated with an inner cavity of the sampling device is formed in the top of the sampling device; one end of the flow guide pipe is connected with the sampling probe, and the other end of the flow guide pipe is communicated with the through hole. The invention also discloses a sampling probe and a sampling method. According to the invention, the metal sample and the sampling mold can be easily separated, and the handle part formed by solidification of metal in the flow guide pipe cannot be remained on the sample, so that the procedures of automatic treatment after probe sampling, subsequent automatic sorting and the like are facilitated, the probe post-treatment time is saved, and the production efficiency is improved.

Description

Technical Field

[0001] This invention relates to a tooling for extracting metal samples from molten metal, and more specifically, to a sampling device, a sampling probe, and a sampling method. Background Technology

[0002] In steelmaking and continuous casting processes, it is necessary to extract molten metal samples from ladles containing liquid metal to analyze parameters such as composition. Typically, a sampling probe is inserted into the ladle containing the molten metal. The molten metal flows through the sampling port of the probe into a sampling mold. When the sampling probe is removed from the ladle, the molten metal solidifies in the mold to form a sample. Sampling probes for this purpose usually consist of two long, oval paper tubes: a clamping section and a sampling section. The sampling section includes a sampling mold for forming and containing the metal sample and an oval paper tube encapsulating the sample. The sampling section, which comes into contact with the molten metal, has channels made of refractory material or ceramic to inject the molten metal into a guide tube, which then flows into the sampling mold. The clamping section has an oval paper tube for easy gripping by a mechanism.

[0003] Typically, the sampling mold is a cylindrical metal piece with a circular inner side. The inner sides of two sampling molds face each other and are fixed together with metal clamps, forming a sample formation space between the two molds. A circular hole on the side of the sample forms a hollow cylindrical glass guide tube. The formed metal sample is disc-shaped, with a handle formed by the solidification of the liquid metal within the hollow portion of the guide tube.

[0004] After sampling, the elongated paper tube of the probe sampling section usually needs to be manually broken to separate the sampling mold containing the metal sample from the metal clamp. The metal sample is then removed from the sampling mold, and the metal stalk formed inside the guide tube is broken off, resulting in a disc-shaped sample without a stalk for sample transport. Due to the presence of the metal clamp fixing the sampling mold and the stalk remaining on the sample, the existing probe structure is not conducive to automatically separating the metal sample after probe sampling using automated equipment.

[0005] In existing patent applications, such as Chinese Patent Publication No. CN113834696A, a system for automatically breaking up a sampling bullet and removing a sample after molten steel sampling is proposed. The system includes a bullet handle clamping and rotating device that grips the handle of the sampling bullet and rotates it; a telescopic drive that moves a pneumatic vibrator and a crushing claw closer to or away from the sample; the pneumatic vibrator that vibrates the crushing claw; and a sliding component that moves a sliding bracket and a sliding pneumatic claw closer to or away from the sample. A sample transfer mechanism not only grips the sample on the sliding pneumatic claw but also moves the sample to a cooling water tank for cooling. However, this patented technology suffers from difficulties in controlling the degree of breakage after the sampling bullet is broken, and its internal components are complex. The angle of the sample handle varies after each breakage, and the sliding pneumatic claw lacks the flexibility to effectively grasp the sample handle, making it challenging to achieve this.

[0006] For example, Chinese Patent Application No. 201320071997.0 discloses a device for automatically exposing a sample body, wherein the sample body is arranged in a probe tube for sampling from molten metal within a housing. The sample body is guided to a housing removal device after passing through a region separating the probe tube and including the housing and the sample body. There, the housing is broken by a centrifuge, and the exposed sample body is removed from the sample removal area. One embodiment utilizes the dimensional constraints between the centrifuge and the base plate, allowing only the separated sample, mold housing, and filler material to pass through. Unseparated components are thrown towards a collision body by the centrifuge impeller, often resulting in disintegration. The disintegrated sample and mold housing pass through the gap under the centrifuge impeller. Due to the tilt of the base plate and the action of the vibrating motor, the sampling mold housing and filler material slide downwards along the metal plate. When passing a baffle, the shorter mold housing and filler material pass through the channel, and the sample is guided by the baffle into the sample removal area. This device achieves separation through the size limitation between the centrifuge device and the base plate. Because the probe paper tube, sample, sampling mold and other components have complex structures, jamming failures are prone to occur here, affecting the overall level of automation. Summary of the Invention

[0007] To address the shortcomings of existing technologies, the present invention aims to provide a sampling device, sampling probe, and sampling method that facilitates the separation of metal samples from sampling molds and prevents the stalk formed by the solidification of metal in the guide tube from remaining on the sample. This facilitates automatic processing after probe sampling and subsequent automatic picking processes, saving probe post-processing time and thus improving production efficiency.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] The first aspect of the present invention provides a sampling device, comprising two sample molds and a flow guide tube;

[0010] The inner side of the sample mold is provided with an open cavity, and the inner sides of the two sample molds are closed to form a sampling device with a cavity.

[0011] The outer surface of the sample mold is provided with grooves;

[0012] The top of the sampling device is provided with a through hole that communicates with its internal cavity;

[0013] One end of the guide tube is connected to the sampling probe, and the other end is connected to the through hole.

[0014] Preferably, the sample mold is cylindrical, with an open cavity at the top.

[0015] Preferably, a semi-circular hole is provided at the top of the side wall of the sample mold;

[0016] The two sample molds are closed relative to each other to form the through hole.

[0017] Preferably, the groove has 3 grooves;

[0018] The three grooves intersect each other and extend to the top of the side wall of the sample mold.

[0019] Preferably, the depth of the groove is 1 / 2 of the thickness of the sample mold;

[0020] The bottom of the groove is set as a semi-circle.

[0021] Preferably, the material of the sample mold is a graphite-based sintered material.

[0022] Preferably, the material of the guide tube is quartz.

[0023] Preferably, the end of the guide tube that is connected to the through hole is set to be tapered or circular, and its inner diameter is smaller than the inner diameter of the end connected to the sampling probe.

[0024] Preferably, the outer surfaces of the two sample molds are fixed by wrapping them with paper fixing tape.

[0025] A second aspect of the present invention provides a sampling probe, comprising a sampling part and a clamping part connected in sequence, wherein the sampling part is provided with the sampling device provided in the first aspect of the present invention.

[0026] Preferably, the sampling section is further provided with a ceramic profile and a paper tube for supporting the sampling device.

[0027] The third aspect of the present invention provides a sampling method, which uses the sampling probe provided in the second aspect of the present invention to perform a sampling operation with one cut and a sampling operation with two cuts.

[0028] Preferably, the sampling operation involving one shearing step specifically includes:

[0029] The sampling probe is inserted into the molten iron, and the molten iron enters the cavity of the sampling device through the guide tube and solidifies to form a sample. At this time, the paper fixing strip burns and loses its function of fixing the two sample molds.

[0030] The robotic arm grips the sampling probe and, along a pre-set cutting position of the sampling probe relative to the length direction of the upper shearing blade, inserts the sampling probe into the gap between the upper and lower shearing blades.

[0031] After the detection device detects that the sampling part of the sampling probe has reached a preset position relative to the lower shear blade, it stops the movement of the robot arm and drives the upper shear blade to move up and down to cut off the sampling part of the sampling probe that is placed horizontally on the lower shear blade.

[0032] Preferably, the sampling operation involving two shearing steps specifically includes:

[0033] The sampling probe is inserted into the molten iron, and the molten iron enters the cavity of the sampling device through the guide tube and solidifies to form a sample. At this time, the paper fixing strip burns and loses its function of fixing the two sample molds.

[0034] The robotic arm grips the sampling probe and, along a pre-set cutting position of the sampling probe relative to the length direction of the upper shearing blade, inserts the sampling probe into the gap between the upper and lower shearing blades.

[0035] After the detection device detects that the sampling part of the sampling probe has reached the preset first cutting position relative to the lower shear blade, it stops the movement of the robot arm and drives the upper shear blade to move up and down to cut off the rear part of the sampling part of the sampling probe that is placed horizontally on the lower shear blade.

[0036] The robotic arm continues to feed the sampling probe into the lower shear blade. After the detection device detects that the sampling part of the sampling probe has reached the preset second shearing position relative to the lower shear blade, it stops the movement of the robotic arm and drives the upper shear blade to move up and down to cut off the sampling part of the sampling probe containing the sample and the sampling device, which is placed horizontally on the lower shear blade.

[0037] This invention provides a sampling device, sampling probe, and sampling method. The sampling probe facilitates the separation of the sample from the sampling mold and paper tube, and the stalk formed by the solidification of metal in the guide tube does not remain on the sample. This facilitates automatic processing after sampling and subsequent automatic sorting processes, saving post-processing time and improving production efficiency. This invention replaces traditional automated separation sampling devices while accelerating sampling efficiency and improving safety and reliability. Therefore, it can be beneficially applied in industries such as iron and steel manufacturing. Attached Figure Description

[0038] Figure 1 This is a three-dimensional structural schematic diagram of the sampling device of the present invention;

[0039] Figure 2 This is a front view schematic diagram of the sampling device of the present invention;

[0040] Figure 3 yes Figure 2 Schematic sectional view along the middle AA direction;

[0041] Figure 4 This is a three-dimensional structural diagram of the inner side of the sampling mold in the sampling device of the present invention;

[0042] Figure 5 This is a three-dimensional structural diagram of the outer side of the sampling mold in the sampling device of the present invention;

[0043] Figure 6 This is a schematic diagram showing that one end of the guide tube in the sampling device of the present invention is set in a conical shape;

[0044] Figure 7 This is a schematic diagram showing that one end of the guide tube in the sampling device of the present invention is circular;

[0045] Figure 8 This is a schematic diagram of a sampling operation involving one shearing step in the sampling method of this invention;

[0046] Figure 9 This is a schematic diagram of the sampling operation involving two cuts in the sampling method of the present invention;

[0047] Figure 10 This is a schematic diagram of the screening machine conveying the sampling probe;

[0048] Figure 11 This is a schematic diagram of the sample. Detailed Implementation

[0049] To better understand the above-mentioned technical solutions of the present invention, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0050] Combination Figures 1 to 5 As shown, the sampling device provided by the present invention includes two sample molds 1 and a guide tube 2.

[0051] Each sample mold 1 has an open cavity 3 on its inner side, and the inner sides of two sample molds 1 are closed to form a sampling device with a cavity.

[0052] Each sample mold 1 is set to be cylindrical, with an open cavity 3 at the top of the cylinder.

[0053] Each sample mold 1 has 3 grooves 4 on its outer side surface. The 3 grooves 4 intersect each other and extend to the top of the side wall of the sample mold 2.

[0054] The top of the sampling device has a through hole that communicates with its internal cavity, specifically:

[0055] Each sample mold 1 has a semi-circular hole 5 on the top of its side wall, and the semi-circular holes 5 of two sample molds 1 are closed to each other to form a through hole.

[0056] The two sample molds 1 are fixed in relative position by wrapping paper fixing tape 6 around their outer surfaces. The tape can burn or melt at a temperature of 500°C or higher and lose its fixing effect.

[0057] One end of the guide tube is connected to the sampling probe, and the other end is connected to the through hole.

[0058] The end face of the guide tube 2 that connects to the through hole is set to a tapered shape (e.g., Figure 6 (as shown) or circular (such as) Figure 7 (as shown), and the inner diameter is smaller than the inner diameter of the end connected to the sampling probe.

[0059] The depth of groove 4 is half the thickness of sample mold 1, and the bottom of groove 4 is set as semi-circular.

[0060] The sample mold 1 is made of graphite-based sintered material, and the guide tube 2 is made of quartz, which makes the thermal conductivity of the sample mold 1 much greater than that of the guide tube 2.

[0061] Combination Figure 8 and Figure 9 As shown, the present invention also provides a sampling probe 7, including a sampling part 701 and a clamping part 702 connected in sequence, and the sampling part 702 is equipped with the sampling device of the present invention.

[0062] The sampling section 701 also has a ceramic profile 8 and a paper tube 9 for supporting the sampling device.

[0063] Continue to refer to Figures 8 to 10 As shown, the present invention also provides a sampling method, which uses the sampling device of the present invention to perform sampling operations with one cut and sampling operations with two cuts.

[0064] A sampling operation involving one shearing step specifically includes:

[0065] The sampling probe 7 is inserted into the molten iron. The molten iron enters the cavity of the sampling device through the guide tube 2, where the two sample molds 1 close and solidify, thus forming a disc-shaped sample 10 (e.g., ...). Figure 11 As shown), at the same time, the paper fixing tape 6 loses its function of fixing the two sample molds 1 due to high temperature combustion.

[0066] The gripper 702 of the robotic arm 11 holds the sampling probe 7 and feeds the sampling probe 7 into the gap between the upper shear blade 12 and the lower shear blade 13 of the shearing device along the pre-set shearing position of the sampling probe 7 relative to the length direction of the upper shear blade 12.

[0067] After the detection device 14 detects that the sampling part 701 of the sampling probe 7 has reached the preset position relative to the lower shear blade 13, the control system stops the movement of the robot arm 11 and instead drives the upper shear blade 12 to move up and down to cut off the sampling part 701 of the sampling probe 7, which is placed horizontally on the lower shear blade 13. The cutting position is at the middle of the guide tube 2, which is 10 mm away from the sample mold 1. The cut-off sampling part 701 is conveyed to the screening machine 16 by the conveying device 15. The two screens arranged on the upper and lower sides of the screening machine 16 convey the sampling part 701 from the inlet 1601 to the outlets 1602 and 1603 through vibration. The sample 10 is conveyed to the outlet 1603, and the two sample molds 1 and the paper tube 9 are conveyed to the outlet 1602.

[0068] The sampling process involving two cuts specifically includes:

[0069] The sampling probe 7 is inserted into the molten iron. The molten iron enters the cavity of the sampling device through the guide tube 2, where the two sample molds 1 close and solidify, thus forming a disc-shaped sample 10 (e.g., ...). Figure 11 As shown), at the same time, the paper fixing tape 6 loses its function of fixing the two sample molds 1 due to high temperature combustion.

[0070] The gripper 702 of the robotic arm 11 holds the sampling probe 7 and feeds the sampling probe 7 into the gap between the upper shear blade 12 and the lower shear blade 13 of the shearing device along the pre-set shearing position of the sampling probe 7 relative to the length direction of the upper shear blade 12.

[0071] First cut: After the detection device 14 detects that the sampling part 701 of the sampling probe 7 has reached the preset first cut position relative to the lower shear blade 12, the control system stops the movement of the robot arm 11 and drives the upper shear blade 12 to move up and down to cut off the rear part of the sampling part 701 of the sampling probe 7 that is horizontally placed on the lower shear blade 13. At this time, the cut part does not contain the sample 10.

[0072] Second shearing: The robotic arm 11 continues to feed the sampling probe 7's gripping part 701 into the shearing device. After the detection device 14 detects that the sampling part 701 of the sampling probe 7 has reached the preset second shearing position relative to the lower shearing blade 13, the control system stops the robotic arm 11 and instead drives the upper shearing blade 12 to move up and down, cutting off the sampling part 701 of the sampling probe 7, which is horizontally placed on the lower shearing blade 13, containing the sample 10 and the sampling device. The cutting position is the middle of the guide tube 2, which is 10 mm away from the sample mold 1.

[0073] The cut-off sampling section 701 is conveyed to the screening machine 16 via the conveying device 15. The two screens arranged on the upper and lower parts of the screening machine 16 convey the sampling section 701 from the inlet 1601 to the outlets 1602 and 1603 by vibration. Among them, the sample 10 is conveyed to the outlet 1603, and the two sample molds 1 and the paper tube 9 are conveyed to the outlet 1602.

[0074] Those skilled in the art should recognize that the above embodiments are merely illustrative of the present invention and are not intended to limit the present invention. Any variations or modifications to the above embodiments that are within the spirit and essence of the present invention will fall within the scope of the claims of the present invention.

Claims

1. A sampling device, characterized in that: Includes two sample molds and a flow guide tube; The inner side of the sample mold is provided with an open cavity, and the inner sides of the two sample molds are closed to form a sampling device with a cavity. The outer surface of the sample mold is provided with grooves; The top of the sampling device is provided with a through hole that communicates with its internal cavity; One end of the guide tube is connected to the sampling probe, and the other end is connected to the through hole.

2. The sampling device according to claim 1, characterized in that: The sample mold is cylindrical, with an open cavity at the top.

3. The sampling device according to claim 2, characterized in that: A semi-circular hole is provided at the top of the side wall of the sample mold; The two sample molds are closed relative to each other to form the through hole.

4. The sampling device according to claim 3, characterized in that: The trench has three grooves; The three grooves intersect each other and extend to the top of the side wall of the sample mold.

5. The sampling device according to claim 4, characterized in that: The depth of the groove is 1 / 2 of the thickness of the sample mold; The bottom of the groove is set as a semi-circle.

6. The sampling device according to claim 1, characterized in that: The material of the sample mold is a graphite-based sintered material.

7. The sampling device according to claim 1, characterized in that: The material of the guide tube is quartz.

8. The sampling device according to claim 7, characterized in that: The end of the guide tube that connects to the through hole is set to be tapered or circular, and its inner diameter is smaller than the inner diameter of the end connected to the sampling probe.

9. The sampling device according to claim 1, characterized in that: The outer surfaces of the two sample molds are fixed by wrapping them with paper fixing tape.

10. A sampling probe, comprising a sampling part and a clamping part connected in sequence, characterized in that: The sampling section is provided with a sampling device as described in any one of claims 1-9.

11. The sampling probe according to claim 10, characterized in that: The sampling section is also provided with a ceramic profile and a paper tube for supporting the sampling device.

12. A sampling method, characterized in that: The sampling probe described in claim 11 is used to perform sampling operations with one cut and sampling operations with two cuts.

13. The sampling method according to claim 12, characterized in that, The sampling operation involving one shearing step specifically includes: The sampling probe is inserted into the molten iron, and the molten iron enters the cavity of the sampling device through the guide tube and solidifies to form a sample. At this time, the paper fixing strip burns and loses its function of fixing the two sample molds. The robotic arm grips the sampling probe and, along a pre-set cutting position of the sampling probe relative to the length direction of the upper shearing blade, inserts the sampling probe into the gap between the upper and lower shearing blades. After the detection device detects that the sampling part of the sampling probe has reached a preset position relative to the lower shear blade, it stops the movement of the robot arm and drives the upper shear blade to move up and down to cut off the sampling part of the sampling probe that is placed horizontally on the lower shear blade.

14. The sampling method according to claim 12, characterized in that, The sampling operation involving two shearing steps specifically includes: The sampling probe is inserted into the molten iron, and the molten iron enters the cavity of the sampling device through the guide tube and solidifies to form a sample. At this time, the paper fixing strip burns and loses its function of fixing the two sample molds. The robotic arm grips the sampling probe and, along a pre-set cutting position of the sampling probe relative to the length direction of the upper shearing blade, inserts the sampling probe into the gap between the upper and lower shearing blades. After the detection device detects that the sampling part of the sampling probe has reached the preset first cutting position relative to the lower shear blade, it stops the movement of the robot arm and drives the upper shear blade to move up and down to cut off the rear part of the sampling part of the sampling probe that is placed horizontally on the lower shear blade. The robotic arm continues to feed the sampling probe into the lower shear blade. After the detection device detects that the sampling part of the sampling probe has reached the preset second shearing position relative to the lower shear blade, it stops the movement of the robotic arm and drives the upper shear blade to move up and down to cut off the sampling part of the sampling probe containing the sample and the sampling device, which is placed horizontally on the lower shear blade.

Images