Pneumatic locking mineral powder sampling device and use method

Abstract

The invention discloses a pneumatic locking mineral powder sampling device and a use method, and belongs to the technical field of mine metallurgy mineral powder sampling, the pneumatic locking mineral powder sampling device comprises a sampling rod of a hollow structure, the top of the sampling rod is provided with an opening, and the side wall of the bottom end of a sampling pipe is symmetrically provided with two holes; the air pipe is attached to the outer side of the sampling rod; an air source connector is formed in the top of the air pipe; the elastic rubber sheet covers the hole in the bottom end of the sampling rod close to the air pipe and is fixed through a screw; the metal shell is arranged at the bottom of the air pipe to press the elastic rubber sheet and is spaced with the elastic rubber sheet to form an air chamber; the unloading hole is a hole at one end of the sampling rod far away from the air pipe; the bent support is connected to the outer wall of the air pipe. The problems of insufficient sampling depth, material adhesion and leakage, complicated maintenance and the like in the prior art can be solved, the elastic rubber sheet is driven by air pressure to deform to realize material locking and unloading, and the sampling depth, the reliability and the maintenance convenience are remarkably improved by combining with structural optimization.

Description

Technical Field

[0001] The present invention relates to the technical field of sampling of mine metallurgy ore powder, and specifically relates to a pneumatic locking ore powder sampling device and a using method thereof. Background Art

[0002] In the mining industry, when the concentrate powder warehouse produced by the concentrator is sold, both the buyer and the seller often need to sample the ore powder. After the sampled ore powder is tested in the laboratory, the test indexes are used for settlement. Therefore, representative sampling of the concentrate powder is a key link in quality control, and the quality inspection of the concentrate powder is also the core basis for transaction settlement. Its sampling representativeness directly affects the accuracy of the test results.

[0003] Traditional manual sampling has problems such as strong subjectivity, low efficiency, and being easily interfered by humans. In the prior art, the sampling process is made unmanned by using robots or other automation equipment to prevent human interference with the sampling results. However, the prior art still has the following defects:

[0004] Insufficient sampling depth: Since most of the samplers on the market use a mechanical structure at the end of the sampling tube to block the sampling tube orifice, the traditional mechanical plugging sampler has a large volume and high resistance, and can only obtain surface samples. Often due to resistance, the sampling tube cannot be inserted deep into the ore powder, so that the sampled ore sample is a surface ore sample, lacking representativeness;

[0005] Problems of sticking material and leaking material: Due to the different moisture content and ore properties of the ore powder, problems such as dropping material and sticking material often occur during the sampling process. When the moisture content of the ore powder is high, it is easy to adhere to the inner wall of the sampling tube, and the mechanical material locking structure is easy to jam, resulting in residual unloading or leakage during transportation;

[0006] Complex maintenance: The current sealing method of the sampler is set as a mechanical structure. After the ore powder enters the mechanical structure, it is easy to store material and jam the operation of the mechanical structure. The maintenance amount is large. The mechanical plugging mechanism needs to be frequently cleaned, and the maintenance cost is high, affecting the continuous operation efficiency;

[0007] Poor adaptability: Existing samplers are difficult to adapt to different ore powder characteristics (such as particle size, viscosity), and the versatility is low. Summary of the Invention

[0008] Aiming at the problems existing in the prior art, the present invention provides a pneumatic locking ore powder sampling device and a using method thereof, which can solve the problems of insufficient sampling depth, sticking and leaking materials, and complex maintenance in the prior art. By driving the deformation of an elastic rubber sheet by air pressure to realize material locking and unloading, combined with structural optimization, the sampling depth, reliability, and maintenance convenience are significantly improved.

[0009] The technical solution of the present invention is as follows:

[0010] In the first aspect of the present invention, a pneumatic locking ore powder sampling device is provided, including:

[0011] A sampling rod with a hollow structure, an opening is provided at the top of the sampling rod, and two holes are symmetrically opened on the side wall at the bottom end of the sampling tube;

[0012] An air pipe, the air pipe is attached to the outside of the sampling rod, and an air source connection port is provided at the top of the air pipe;

[0013] An elastic rubber sheet, the elastic rubber sheet covers the hole at one end of the bottom of the sampling rod close to the air pipe and is fixed by screws;

[0014] A metal shell, the metal shell is arranged at the bottom of the air pipe to press the elastic rubber sheet and forms an air chamber with a certain space from the elastic rubber sheet;

[0015] A discharge hole, the discharge hole is the hole at one end of the bottom of the sampling rod far from the air pipe;

[0016] A bent bracket, the bent bracket is connected to the outer wall of the air pipe.

[0017] In some embodiments of the present invention, the air pipe is a metal air pipe, and a metal shell is provided on the outer wall at the bottom end of the metal air pipe.

[0018] In some embodiments of the present invention, the air source connection port is connected to an external air source, and the air chamber is communicated with the external air source through the metal air pipe.

[0019] In some embodiments of the present invention, a plunger-type push rod is configured at the opening at the top of the sampling rod, and the plunger-type push rod can axially move in the inner cavity of the sampling rod.

[0020] In some embodiments of the present invention, the metal shell is arranged in a hemispherical structure.

[0021] In some embodiments of the present invention, the bent bracket is connected to an external manipulator or an automated actuator.

[0022] In some embodiments of the present invention, the sampling rod is made of a wear-resistant alloy material, and the opening at the bottom end of the sampling rod is set as an inclined chamfer structure.

[0023] In some embodiments of the present invention, the diameter of the discharge hole is greater than or equal to 1 / 3 of the inner diameter of the sampling rod.

[0024] In some embodiments of the present invention, the air pipe and the sampling rod are arranged axially parallel to each other.

[0025] In the second aspect of the present invention, a method for using a pneumatic locking ore powder sampling device is provided, including:

[0026] When taking samples of ore powder, insert the bottom end of the sampling rod into the ore powder for tube-type deep sampling. After the sampling device is taken out and leaves the ore powder area, connect the air source connection port to an external air source to form air pressure in the air chamber at the bottom end of the metal air pipe, causing the elastic rubber sheet to expand and deform towards the discharge hole on the side of the sampling rod, squeezing the powder in the area of the sampling rod in contact with the elastic rubber sheet until the powder is extruded from the discharge hole of the sampling rod. The elastic rubber sheet blocks the bottom position of the sampling rod and the discharge hole, completing the blockade of the powder in the sampling rod.

[0027] When discharging the ore powder, disconnect or close the external air source to stop inflating the metal air pipe. The elastic rubber sheet retracts due to the loss of inflation effect. The opening at the bottom position of the sampling rod and the discharge hole are opened. A plunger-type push rod is inserted into the inner cavity of the sampling rod from the top of the sampling rod to axially push the powder in the sampling rod to complete the discharging.

[0028] One or more technical solutions of the present invention have the following beneficial effects:

[0029] The pneumatic locking ore powder sampling device and its using method provided by the present invention can solve the problems of insufficient sampling depth, sticking and leaking of materials, and complex maintenance in the prior art. By driving the deformation of the elastic rubber sheet by air pressure to achieve material locking and discharging, combined with structural optimization, it significantly improves the sampling depth, reliability and maintenance convenience. Specifically:

[0030] The hollow sampling rod serves as the sampling main body. Its hollow design allows the ore powder to freely enter the interior. Circular holes are symmetrically opened at the bottom end, with an elastic rubber sheet covering one side and a discharge hole on the other side, providing a physical channel for material locking and discharging. The hollow sampling rod is made of wear-resistant alloy material to ensure structural strength while achieving structural lightweight. The edges of the bottom holes are chamfered to reduce the insertion resistance. The pneumatic locking mechanism does not require complex mechanical structures, and the sampling rod can easily penetrate deep into the ore powder for sampling. The sampling rod cooperates with the pneumatic mechanism to replace the mechanical structure for material locking, further realizing deep sampling with reduced friction and balanced sampling with low resistance.

[0031] A metal air pipe is arranged attached to the outside of the sampling rod, connected to the air source at the top, and a sealed air chamber is formed with the elastic rubber sheet through a metal shell at the bottom. When the air source is turned on, the air pressure acts on the elastic rubber sheet evenly through the air chamber, driving its deformation. The elastic rubber sheet covers the hole on one side of the bottom end, and after expanding under the air pressure, it squeezes towards the inner side of the sampling rod, forcing the sample material to be discharged from the discharge hole and simultaneously closing the bottom hole to prevent material leakage. After the air source is turned off, the elastic rubber sheet resets, and the plunger push rod is inserted from the top opening to completely push out the sample material, achieving zero-residue discharging. The air pressure drives the deformation of the elastic rubber sheet to complete material locking and discharging without step-by-step operation. The sealed design of the air chamber ensures stable air pressure and avoids energy loss, realizing the integration of pneumatic locking and discharging.

[0032] Using a wear-resistant alloy sampling rod and a highly elastic rubber sheet can extend the service life of the device. The hemispherical metal shell disperses stress and improves the structural durability of the device.

[0033] The bent bracket connects to an external manipulator or automated equipment to ensure the precise positioning of the sampler and unmanned operation, enabling convenient adjustment and control of the sampling position, improving the accuracy of the sampling position. The air source quick connector supports compatibility with multiple devices, enhancing the practicality of the device. Brief Description of the Drawings

[0034] Figure 1 Figure 1 is a side schematic view of the overall structure of a pneumatic locking mineral powder sampling device provided in Embodiment 1 of the present invention;

[0035] Figure 2 Figure 2 is a front schematic view of the overall structure of a pneumatic locking mineral powder sampling device provided in Embodiment 1 of the present invention;

[0036] Figure 3 Figure 3 is a schematic view of the structure of the elastic rubber sheet connected to the circular hole of the sampling rod provided in Embodiment 1 of the present invention.

[0037] In the figures: 1. Sampling rod; 2. Metal air pipe; 3. Elastic rubber sheet; 4. Metal shell; 5. Discharge hole; 6. Air chamber; 7. Open port; 8. Air source connection port; 9. Bent bracket; 10. Screw. Detailed Embodiments

[0038] The present invention will be further described below in conjunction with the drawings and embodiments.

[0039] Embodiment 1

[0040] In a typical embodiment of the present invention, a pneumatic locking mineral powder sampling device is proposed, including:

[0041] A sampling rod 1 with a hollow structure, an open port 7 is provided at the top of the sampling rod 1, and two holes are symmetrically opened on the side wall at the bottom of the sampling tube;

[0042] An air pipe, the air pipe is attached to the outside of the sampling rod 1, and an air source connection port 8 is provided at the top of the air pipe;

[0043] An elastic rubber sheet 3, the elastic rubber sheet 3 covers the hole at one end of the bottom of the sampling rod 1 close to the air pipe and is fixed by screws 10;

[0044] A metal shell 4, the metal shell 4 is arranged at the bottom of the air pipe to press the elastic rubber sheet 3 and form an air chamber 6 with a certain space from the elastic rubber sheet 3;

[0045] A discharge hole 5, the discharge hole 5 is the hole at the end of the bottom of the sampling rod 1 far from the air pipe;

[0046] The bent bracket 9 is connected to the outer wall of the trachea.

[0047] Since most of the samplers on the market use a mechanical structure to block the sampling port at the end of the sampling tube, the traditional mechanical plugging sampler has a large volume and high resistance, and can only obtain surface samples. Often, due to resistance, the sampling tube cannot be inserted deep into the ore powder, so that the obtained ore sample is a surface ore sample, lacking representativeness. Moreover, due to the different moisture content and properties of the ore powder, problems such as material dropping and sticking often occur during the sampling process. When the moisture content of the ore powder is high, it is easy to adhere to the inner wall of the sampling tube, and the mechanical material locking structure is prone to jamming, resulting in residual unloading or material leakage during transportation.

[0048] In this embodiment, the hollow sampling rod 1 is designed to allow deep penetration to the full depth of the cross-section of the ore powder, ensuring sampling representativeness; the pneumatic locking mechanism composed of the trachea, the elastic rubber sheet 3, the discharge hole 5 and the metal shell 4 replaces the traditional mechanical structure, which can reduce resistance and avoid jamming during the sampling process; the modular component design simplifies the maintenance process and can extend the service life of the device.

[0049] Specifically, the hollow sampling rod 1 is the sampling main body. Its hollow structure design allows the ore powder to freely enter the interior. Circular holes are symmetrically opened at the bottom end. One side is covered with an elastic rubber sheet 3, and the other side is set as the discharge hole 5, providing a physical channel for material locking and discharging. The hollow sampling rod 1 is made of wear-resistant alloy material to achieve structural lightweight while ensuring structural strength. The edges of the bottom holes are chamfered to reduce the insertion resistance. The pneumatic locking mechanism does not require a complex mechanical structure, and the sampling rod 1 can easily penetrate deep into the ore powder for sampling. The sampling rod 1 cooperates with the pneumatic mechanism to replace the mechanical structure for material locking, further realizing deep sampling with reduced friction and balanced sampling with low resistance.

[0050] A metal trachea 2 is attached to the outside of the sampling rod 1. The top is connected to the air source, and the bottom forms a sealed air chamber 6 with the elastic rubber sheet 3 through the metal shell 4. When the air source is turned on, the air pressure acts uniformly on the elastic rubber sheet 3 through the air chamber 6, driving its deformation. The elastic rubber sheet 3 covers one side hole at the bottom end and squeezes inward against the sampling rod 1 after expanding under the air pressure, forcing the sample material to be discharged from the discharge hole 5 and simultaneously closing the bottom hole to prevent material leakage; after the air source is turned off, the elastic rubber sheet 3 resets, and the plunger push rod is inserted from the top opening 7 to completely push out the sample material, realizing zero-residual unloading; the air pressure drives the deformation of the elastic rubber sheet 3 to complete material locking and discharging without step-by-step operation. The sealed design of the air chamber 6 ensures stable air pressure and avoids energy loss, realizing the integration of pneumatic locking and discharging.

[0051] In this embodiment, the thickness and hardness of the elastic rubber sheet 3 are adaptively adjusted according to the characteristics of the ore powder, such as the moisture content and particle size of the ore powder, to ensure the efficient pneumatic locking and discharging of the device. The high-elasticity material can ensure rapid reset after deformation, extend the service life of the elastic rubber sheet 3, and at the same time, the customized design of the thickness and hardness of the elastic rubber sheet 3 can improve the adaptability to different ore powders. The elastic rubber sheet 3 covers the hole at one end of the bottom of the sampling rod 1 near the air pipe and is fixed by a plurality of screws 10 to achieve stable connection of the elastic rubber sheet 3 and avoid air leakage during use.

[0052] Further, the air pipe adopts a metal air pipe 2, and a metal shell 4 is provided on the outer wall of the bottom end of the metal air pipe 2. In this embodiment, the air pipe is made of wear-resistant alloy material to form the metal air pipe 2, which realizes the lightweight of the overall structure of the device while ensuring the structural strength of the air pipe and improving the durability of the device.

[0053] Further, the air source connection port 8 is connected to an external air source, and the air chamber 6 is communicated with the external air source through the metal air pipe 2. When the air source is turned on, the air pressure acts uniformly on the elastic rubber sheet 3, forcing it to expand towards the discharging hole 5, squeezing the bottom powder out of the discharging hole 5. At the same time, the elastic rubber sheet 3 can seal the opening at the bottom end of the sampling rod 1 after deformation to prevent material leakage during transportation. The residue at the bottom can be completely discharged during the squeezing process, solving the problem of incomplete discharging of traditional samplers. In addition, the elastic rubber sheet 3 adapts to deformation and seals, adapting to ore powders with different humidities and reducing the problem of the traditional sampling rod 1 adhering to mechanical mechanisms.

[0054] In this embodiment, a pneumatic driving form is adopted to provide a stable acting force on the elastic rubber sheet 3, which can ensure the consistency of the deformation of the elastic rubber sheet 3, avoid the failure of the mechanical structure caused by ore powder adhesion, and in addition, the closed design of the air chamber 6 can improve the energy utilization efficiency and reduce the air source consumption.

[0055] Further, a plunger-type push rod is configured at the top opening 7 of the sampling rod 1, and the plunger-type push rod can axially move in the inner cavity of the sampling rod 1. When the air source is turned off, the elastic rubber sheet 3 resets, and the plunger-type push rod is inserted through the top opening 7 of the sampling rod 1 to push out the sample material at one time. With such a setting, the plunger-type push rod can push out all the powder in the sampling rod 1, avoiding adhesion to the inner wall of the sampling rod 1, so that the powder will not remain during the discharging process, avoiding manual cleaning of the inside of the sampling rod 1, reducing the labor intensity of the operators, improving the work efficiency, and facilitating the maintenance of the device. In addition, the design of the top opening 7 of the sampling rod 1 can be compatible with various specifications of plunger-type push rods, and the appropriate plunger-type push rod specification can be selected according to the properties of different powders, with strong adaptability, improving the practicality of the device, and facilitating efficient discharging.

[0056] Furthermore, the metal shell 4 is arranged in a hemispherical structure, forming a sealed air chamber 6 with the elastic rubber sheet 3 to ensure uniform distribution of air pressure. The hemispherical metal shell 4 can disperse stress, preventing the elastic rubber sheet 3 from being locally torn due to uneven local stress, enhancing the overall service strength of the device, avoiding frequent replacement of the elastic rubber sheet 3. At the same time, the sealed air chamber 6 improves air pressure stability, enhances the reliability of material locking, and prevents powder leakage during the sampling process.

[0057] Furthermore, the bent bracket 9 is connected to an external manipulator or an automated actuator. In this embodiment, one end of the bent bracket 9 is provided with a first connecting rod parallel to the metal air pipe 2, and a second connecting rod is vertically connected to one end of the first connecting rod and extends in a direction away from the metal air pipe 2. Then, a third connecting rod is vertically connected to the other end of the second connecting rod to achieve connection and fixation with other mechanisms.

[0058] With such an arrangement, connecting the bent bracket 9 to an external manipulator or an automated actuator can achieve precise positioning and automated operation of the sampling device, avoiding errors caused by manual operation and improving the efficiency and accuracy of sampling operations.

[0059] The bent bracket 9 and the external manipulator or automated actuator can be connected in a rigid manner to reduce vibration errors during sampling, improve the accuracy of the sampling position, and the bent bracket 9 can be adapted to a variety of automated equipment to promote unmanned operation.

[0060] Furthermore, the sampling rod 1 is made of wear-resistant alloy material, and the bottom opening of the sampling rod 1 is provided with an inclined chamfer structure. With such an arrangement, the use of wear-resistant alloy material can extend the service life of the sampling rod 1 and reduce the replacement frequency, while the chamfer design at the bottom of the sampling rod 1 can reduce the insertion resistance into the sample powder during sampling, improve the deep penetration efficiency, and the extracted ore sample is a deep-layer ore sample, realizing deep sampling of the entire cross-section of the ore powder.

[0061] Furthermore, the diameter of the discharge hole 5 is greater than or equal to one-third of the inner diameter of the sampling rod 1. Due to the different moisture content and properties of the ore powder, problems such as material dropping and sticking often occur during sampling. When the moisture content of the ore powder is high, it is easy to adhere to the inner wall of the sampling tube. Setting the diameter of the discharge hole 5 to be greater than or equal to one-third of the inner diameter of the sampling rod 1, the large aperture can reduce the risk of blockage of the discharge hole 5, especially suitable for highly viscous ore powder, and the structural strength and discharge efficiency are balanced, preventing the sampling rod 1 from deforming during use.

[0062] Furthermore, the air pipe is arranged parallel to the axis of the sampling rod 1.

[0063] In this embodiment, the trachea and the sampling rod 1 are arranged axially parallel to each other, and the diameter of the sampling rod 1 is larger than that of the metal trachea 2, which facilitates the insertion of the sampling rod 1 into the mineral powder for sampling. The metal trachea 2 is fixed to the sampling rod 1 by welding, which can ensure the strength and stability of the overall structure. The metal trachea 2 can also be fixed to the sampling rod 1 in the form of a buckle, which facilitates the disassembly, connection and assembly of the trachea and the sampling rod 1 for use. In addition, the air source connection port 8 can be configured with a quick connector, and the quick connector supports the switching of multiple external air source systems. Appropriate quick connectors can be selected according to the actual situation to connect the external air source to the trachea, improving the compatibility and practicality of the device.

[0064] In the second aspect of the present invention, a method for using a pneumatic locking mineral powder sampling device is provided, including:

[0065] When sampling mineral powder, insert the bottom end of the sampling rod 1 into the interior of the mineral powder for tube-type deep penetration sampling. After the sampling device is taken out and leaves the mineral powder area, the air source connection port 8 is connected to an external air source, and air pressure is formed in the air chamber 6 at the bottom end of the metal trachea 2, causing the elastic rubber sheet 3 to expand and deform towards the discharge hole 5 on the side of the sampling rod 1, squeezing the powder in the area of the sampling rod 1 in contact with the elastic rubber sheet 3 until the powder is extruded from the discharge hole 5 of the sampling rod 1. The elastic rubber sheet 3 blocks the bottom end position of the sampling rod 1 and the discharge hole 5, completing the blockade of the powder in the sampling rod 1.

[0066] When discharging the mineral powder, disconnect or close the external air source to stop inflating the metal trachea 2, and the elastic rubber sheet 3 retracts due to the loss of inflation effect. The opening at the bottom end position of the sampling rod 1 and the discharge hole 5 are opened, and a plunger-type push rod is used to axially push the powder in the sampling rod 1 by extending into the inner cavity of the sampling rod 1 from the top of the sampling rod 1 to complete the discharge.

[0067] The pneumatic locking mineral powder sampling device and the using method provided by the present invention can solve problems such as insufficient sampling depth, sticking and leaking of materials, and complex maintenance in the prior art. By driving the deformation of the elastic rubber sheet 3 with air pressure to achieve material locking and unloading, combined with structural optimization, the sampling depth, reliability and maintenance convenience are significantly improved.

[0068] Using a wear-resistant alloy sampling rod 1 and a high-elastic rubber sheet 3 can extend the service life of the device, and the hemispherical metal shell 4 disperses stress, improving the structural durability of the device.

[0069] The bent bracket 9 is connected to an external manipulator or automation equipment to ensure the accurate positioning and unmanned operation of the sampler, realize convenient adjustment and control of the sampling position, improve the accuracy of the sampling position, and the air source quick connector supports multi-device compatibility, improving the practicality of the device.

[0070] The present invention can be widely applied to the sampling of highly viscous powders in the fields of mining, metallurgy, chemical engineering, etc., and is particularly suitable for integration into automated production lines. Through pneumatic locking, structural optimization, and automation integration, it not only solves the core problems of ore powder sampling and provides an efficient and reliable sampling solution for the industry, but also can be extended to powder sampling scenarios in fields such as chemical engineering and grains, promoting the industry to develop in the direction of high efficiency, intelligence, and low energy consumption.

[0071] Although the specific implementation manners of the present invention are described above in conjunction with the accompanying drawings, they do not limit the protection scope of the present invention. Those skilled in the art should understand that, based on the technical solutions of the present invention, various modifications or deformations that can be made without creative efforts by those skilled in the art are still within the protection scope of the present invention.

Claims

1. A pneumatic locking mineral powder sampling device, characterized in that Comprising: A sampling rod with a hollow structure, an open mouth is provided at the top of the sampling rod, and two holes are symmetrically opened on the side wall at the bottom end of the sampling tube; An air pipe, the air pipe is attached to the outside of the sampling rod, and an air source connection port is provided at the top of the air pipe; An elastic rubber sheet, the elastic rubber sheet covers the hole at one end of the bottom end of the sampling rod close to the air pipe and is fixed by screws; A metal shell, the metal shell is arranged at the bottom of the air pipe to press the elastic rubber sheet and form an air chamber at a certain space interval from the elastic rubber sheet; A discharge hole, the discharge hole is the hole at one end of the bottom end of the sampling rod away from the air pipe; A bent bracket, the bent bracket is connected to the outer wall of the air pipe.

2. The pneumatic locking type ore powder sampling device according to claim 1, wherein The air pipe is made of a metal air pipe, and a metal shell is provided on the outer wall at the bottom end of the metal air pipe.

3. The pneumatic locking type ore powder sampling device according to claim 1, wherein, The air source connection port is connected to an external air source, and the air chamber is communicated with the external air source through the metal air pipe.

4. The pneumatic locking type ore powder sampling device according to claim 1, characterized in that, A plunger-type push rod is arranged at the open mouth at the top of the sampling rod, and the plunger-type push rod can axially move in the inner cavity of the sampling rod.

5. The pneumatic locking type ore powder sampling device according to claim 1, wherein The metal shell is arranged in a hemispherical structure.

6. The pneumatic locking type ore powder sampling device according to claim 1, characterized in that, The bent bracket is connected to an external manipulator or an automated actuator.

7. The pneumatic locking type ore powder sampling device according to claim 1, wherein, The sampling rod is made of a wear-resistant alloy material, and the opening at the bottom end of the sampling rod is arranged in an inclined chamfer structure.

8. The pneumatic locking type ore powder sampling device according to claim 1, wherein, The diameter of the discharge hole is greater than or equal to 1 / 3 of the inner diameter of the sampling rod.

9. The pneumatic locking type ore powder sampling device according to claim 1, characterized in that, The air pipe and the sampling rod are arranged axially parallel to each other.

10. The usage method of a pneumatic locking ore powder sampling device according to any one of claims 1-9, characterized in that, Comprising: When sampling ore powder, insert the bottom end of the sampling rod into the ore powder for tubular deep penetration sampling. After the sampling device is taken out and leaves the ore powder area, the air source connection port is connected to an external air source, and air pressure is formed in the air chamber at the bottom end of the metal air pipe, causing the elastic rubber sheet to expand and deform towards the discharge hole on the side of the sampling rod, squeezing the powder in the area of the sampling rod in contact with the elastic rubber sheet until the powder is extruded from the discharge hole of the sampling rod. The elastic rubber sheet blocks the bottom end position of the sampling rod and the discharge hole, completing the blockage of the powder in the sampling rod; When discharging the ore powder, disconnect or close the external air source to stop inflating the metal air pipe, the elastic rubber sheet retracts due to the loss of the inflation effect, the opening at the bottom end position of the sampling rod and the discharge hole are opened, and the plunger-type push rod is used to axially push the powder in the sampling rod by extending into the inner cavity of the sampling rod from the top of the sampling rod to complete the discharging.

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