A sampling device for titanium dioxide detection

Abstract

The present invention discloses a sampling device for titanium dioxide detection, comprising an extraction mechanism, a sampling mechanism is sleeved on the outer side of the extraction mechanism, a lower pressure plate is fixedly connected to the bottom of the sampling mechanism, the extraction mechanism comprises an extraction tube, the outer side of the extraction tube is fixedly connected to the inner side of the sampling mechanism, the top of the extraction tube is fixedly connected to a collection box, and the bottom of the collection box is fixedly connected to the top of the sampling mechanism. The present invention relates to the field of titanium dioxide detection technology. The sampling device for titanium dioxide detection can effectively solve the problem in the prior art that in the process of packaging, transportation and storage, titanium dioxide needs to be sampled and tested regularly in polyethylene bags to prevent it from being squeezed and agglomerated. The existing sampling often only observes and samples the surface powder, and the quality of the deep powder cannot be clearly understood. The representativeness of the sampling is also affected, and the particle size difference and distribution law of titanium dioxide at different positions cannot be analyzed.

Description

Technical Field

[0001] The invention relates to the technical field of titanium dioxide detection, and in particular to a sampling device for titanium dioxide detection. Background Art

[0002] Titanium dioxide is the common name for titanium dioxide used as a pigment. It has a wide range of uses. As one of the white pigments with the best performance in the world, it occupies a large market share in the coating, plastic, ink, papermaking and other industries. In actual production applications, it is necessary to select titanium dioxide raw materials with different properties according to different industries and product uses. However, the properties of titanium dioxide determine that it is not easy to transport. Because titanium dioxide particles are heavy and abrasive, it needs to be carefully selected in the design of the transportation process.

[0003] Titanium dioxide has strong adsorption and corrosive properties, so it is difficult to transport stably and easily accumulates into agglomerates. Titanium dioxide is generally stored in polyethylene bags of about 500 kg. During packaging, transportation and storage, in order to prevent titanium dioxide from being squeezed and agglomerated, it is necessary to regularly sample and test the titanium dioxide in the polyethylene bags. Existing sampling often only observes and samples the surface powder, and the quality of the deep powder cannot be clearly determined. The representativeness of the sampling is also affected, and the particle size differences and distribution patterns of titanium dioxide at different locations cannot be analyzed. Summary of the invention

[0004] Technical issues solved

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a sampling device for titanium dioxide detection, which can effectively solve the problem in the prior art that in order to prevent titanium dioxide from being squeezed and agglomerated during packaging, transportation and storage, the titanium dioxide in the polyethylene bag needs to be sampled and tested regularly. The existing sampling often only observes and samples the surface powder for testing, and the quality of the deep powder cannot be clearly determined. The representativeness of the sampling is also affected, and the problem of the difference in particle size and distribution pattern of titanium dioxide at different positions cannot be analyzed.

[0006] Technical Solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] The present invention provides a sampling device for titanium dioxide detection, comprising an extraction mechanism, a sampling mechanism is sleeved on the outer side of the extraction mechanism, and a lower pressure plate is fixedly connected to the bottom end of the sampling mechanism;

[0009] Wherein, the extraction mechanism includes an extraction tube, the outer side of the extraction tube is fixedly connected to the inner side of the sampling mechanism, the top of the extraction tube is fixedly connected to a collecting box, the bottom of the collecting box is fixedly connected to the top of the sampling mechanism, the bottom end of the extraction tube is fixedly connected to the inner side of the lower pressure plate, a spiral conveying blade is arranged inside the extraction tube, a rotating rod is fixedly connected inside the spiral conveying blade, a driver is fixedly installed on the top of the rotating rod, and the lower pressure plate is rotatably installed with the bottom end of the rotating rod through a tripod arranged on the inner side thereof.

[0010] Furthermore, the collection box is designed as a cylindrical empty shell, and a revolving door is rotatably installed inside the cylindrical empty shell through a hinge group, and a handrail is fixedly connected to the outside of the cylindrical empty shell.

[0011] Furthermore, the driver is composed of an external line, a servo motor and a mounting plate. The servo motor is detachably mounted on the top of the collection box through the mounting plate arranged on the outside thereof, and the inside of the servo motor is fixedly connected to the top of the rotating rod.

[0012] Furthermore, the lower pressure plate is composed of a conical arc plate and an annular plate, the bottom end of the extraction tube is fixedly connected to the inner side of the conical arc plate, the outer side of the tripod is fixedly connected to the inner side of the annular plate, the annular plate is designed with a thin edge, and the thickness of the annular plate becomes thinner from the inside to the outside, and the diameter of the annular plate is larger than the diameter of the sampling mechanism.

[0013] Furthermore, the sampling mechanism includes a lightweight column, the inner side of the lightweight column is fixedly connected to the outer side of the extraction tube, the top end of the lightweight column is fixedly connected to the bottom of the collecting box, the bottom end of the lightweight column is fixedly connected to the outer side of the lower pressure plate, a plurality of groups of slide grooves are provided inside the lightweight column, a sealing plate is slidably connected inside the plurality of slide grooves, a sliding rod is slidably connected inside the sealing plate, a spring group is sleeved on the outer side of the sliding rod, the bottom end of the spring group is fixedly connected to the top of the sealing plate, the sliding rod is fixedly connected to the bottom inside the slide groove by a strong spring arranged at its bottom end, and a sampler is arranged on the inside of the sealing plate.

[0014] Furthermore, a plurality of groups of built-in grooves are provided inside the lightweight column, and a plurality of the built-in grooves are located between adjacent slide grooves. The sampler comprises a material collecting shell, and the material collecting shell is rotatably connected to the inside of the built-in grooves via a rotating shaft arranged inside the material collecting shell. A bending spring is fixedly connected to the bottom of the material collecting shell, and one end of the bending spring away from the material collecting shell is fixedly connected to the inner wall of the built-in groove, and the outer side of the material collecting shell is adapted to the inside of the built-in groove.

[0015] Furthermore, the sealing plate is composed of a push block, an arc-shaped bent plate and a straight plate. The outer side of the straight plate is slidably connected to the inner side of the slide groove, the inner side of the straight plate is slidably connected to the outer side of the slide rod, the lower end side of the arc-shaped bent plate is designed as an arc-shaped thin edge, the outer side of the arc-shaped bent plate is slidably connected to the outer side of the lightweight column, and the outer side of the arc-shaped bent plate is tightly fitted to the outer side of the material extraction shell.

[0016] Furthermore, the material taking shell is composed of a straight plate with an arc edge and a curved concave arc plate, and the outer side of the curved concave arc plate is designed with a thin edge.

[0017] Beneficial Effects

[0018] Compared with the known public technology, the technical solution provided by the present invention has the following beneficial effects:

[0019] The present invention utilizes the combined effect of the lower pressing plate and the extraction mechanism to continuously extract the titanium dioxide powder in the cavity surrounded by the lower pressing plate, so that the sampling mechanism can quickly slide into the interior of the titanium dioxide powder for sampling. The extracted titanium dioxide powder forms a sliding channel, so as to avoid the uninterrupted extrusion of the titanium dioxide powder in the cavity surrounded by the lower pressing plate, which may cause the titanium dioxide powder to be extruded, deformed and agglomerated, and affect the inspection. At the same time, the titanium dioxide powder is prevented from generating stress due to the extrusion, and the titanium dioxide powder around the sampling mechanism is continuously extruded and frictionally rolled, which may affect the particle size difference and distribution law of the titanium dioxide powder at different positions. After the lower pressing plate and the sampling mechanism slide into the specified length, the rotation of the servo motor in the driver is stopped, the spiral conveying blade stops conveying the titanium dioxide powder, and the lower pressing plate stops moving forward. At this time, the sliding rod in the sampling mechanism is pulled forcefully. The top handle drives the sealing plate to slide upward in the slide groove, driving the strong spring to undergo elastic deformation, and the sealing plate continuously separates from the material collection shell in the sampler. The material collection shell is subjected to the elastic force of the bending spring and rotates around the built-in groove through the rotating shaft. The material collection shell is composed of an arc-edged straight plate and a curved concave arc plate, and the outer side of the curved concave arc plate is designed with a thin edge, which is convenient for the thin edge of the curved concave arc plate to quickly dig out the titanium dioxide powder on the outer side of the lightweight column. At the same time, the thin edge reduces the extrusion of the curved concave arc plate on the titanium dioxide powder, and reduces the change in the physical properties of the titanium dioxide powder. The curved concave arc plate is convenient for the storage of titanium dioxide powder. The material collection shell is designed with several groups evenly distributed on the circumferential side of the lightweight column, which is convenient for sampling and testing of multiple groups of titanium dioxide powder at different depths in the bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2 It is a structural schematic diagram of a three-dimensional partial section of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the three-dimensional separation of the present invention;

[0024] Figure 4 It is a three-dimensional structural schematic diagram of the lower pressure plate of the present invention;

[0025] Figure 5 It is a three-dimensional structural schematic diagram of the sampling mechanism of the present invention;

[0026] Figure 6 It is a schematic diagram of the three-dimensional multi-state structure of the sampling mechanism of the present invention;

[0027] Figure 7 It is a schematic diagram of the structure of the three-dimensional separation of the sampler of the present invention.

[0028] The numbers in the figure represent: 1. Extraction mechanism; 11. Extraction tube; 12. Collection box; 13. Spiral conveying blade; 14. Rotating rod; 15. Driver; 16. Tripod; 17. Revolving door; 18. Handrail; 2. Sampling mechanism; 21. Light column; 22. Slide; 23. Sealing plate; 24. Slide; 25. Spring group; 26. Strong spring; 27. Sampler; 271. Material shell; 272. Rotating shaft; 273. Bending spring; 28. Built-in groove; 3. Lower pressure plate. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The present invention will be further described below in conjunction with the embodiments.

[0031] Example:

[0032] See also Figure 1-7 The present invention provides a technical solution: a sampling device for titanium dioxide detection, comprising an extraction mechanism 1, a sampling mechanism 2 is sleeved on the outer side of the extraction mechanism 1, and a lower pressure plate 3 is fixedly connected to the bottom end of the sampling mechanism 2;

[0033] Among them, the extraction mechanism 1 includes an extraction tube 11, the outer side of the extraction tube 11 is fixedly connected to the inner side of the sampling mechanism 2, the top of the extraction tube 11 is fixedly connected to a collecting box 12, the bottom of the collecting box 12 is fixedly connected to the top of the sampling mechanism 2, the bottom end of the extraction tube 11 is fixedly connected to the inner side of the lower pressure plate 3, a spiral conveying blade 13 is arranged inside the extraction tube 11, a rotating rod 14 is fixedly connected inside the spiral conveying blade 13, a driver 15 is fixedly installed on the top of the rotating rod 14, and the lower pressure plate 3 is rotatably installed with the bottom end of the rotating rod 14 through a tripod 16 arranged on its inner side.

[0034] The collecting box 12 is designed as a cylindrical empty shell, and a revolving door 17 is installed inside the cylindrical empty shell through a hinge group to facilitate the rapid removal of titanium dioxide in the collecting box 12 and avoid waste of titanium dioxide. A handrail 18 is fixedly connected to the outside of the cylindrical empty shell to facilitate sampling of the device.

[0035] The driver 15 is composed of an external line, a servo motor and a mounting plate. The servo motor is detachably mounted on the top of the collection box 12 through the mounting plate arranged on the outside thereof, and the inside of the servo motor is fixedly connected to the top of the rotating rod 14.

[0036] The lower pressure plate 3 is composed of a truncated cone arc plate and an annular plate. The bottom end of the extraction tube 11 is fixedly connected to the inner side of the truncated cone arc plate. The outer side of the tripod 16 is fixedly connected to the inner side of the annular plate. The annular plate is designed with thin edges, and the thickness of the annular plate becomes thinner from the inside to the outside, which reduces the effective contact area between the lower pressure plate 3 and the titanium dioxide and facilitates the rapid sliding of the lower pressure plate 3. The diameter of the annular plate is larger than the diameter of the sampling mechanism 2, which facilitates the rapid sliding of the sampling mechanism 2, prevents the titanium dioxide around the sampling mechanism 2 from being compressed and deformed, and greatly reduces the fluidity of the titanium dioxide around the sampling mechanism 2.

[0037] The sampling mechanism 2 includes a lightweight column 21, the inner side of the lightweight column 21 is fixedly connected to the outer side of the extraction tube 11, the top of the lightweight column 21 is fixedly connected to the bottom of the collecting box 12, the bottom of the lightweight column 21 is fixedly connected to the outer side of the lower pressure plate 3, a plurality of groups of slide grooves 22 are provided inside the lightweight column 21, a sealing plate 23 is slidably connected inside the plurality of slide grooves 22, a sliding rod 24 is slidably connected inside the sealing plate 23, a spring group 25 is sleeved on the outer side of the sliding rod 24, the bottom end of the spring group 25 is fixedly connected to the top of the sealing plate 23, the sliding rod 24 is fixedly connected to the inner bottom of the slide groove 22 by a strong spring 26 arranged at its bottom end, the elastic force of the strong spring 26 is much greater than the elastic force of the individual spring group 25, and a sampler 27 is arranged on the inner side of the sealing plate 23.

[0038] A plurality of groups of built-in grooves 28 are provided inside the lightweight column 21, and a plurality of built-in grooves 28 are located between adjacent slide grooves 22. The sampler 27 comprises a material collection shell 271, and the material collection shell 271 is rotatably connected to the inside of the built-in groove 28 via a rotating shaft 272 arranged inside the material collection shell 271. A bending spring 273 is fixedly connected to the bottom of the material collection shell 271, and one end of the bending spring 273 away from the material collection shell 271 is fixedly connected to the inner wall of the built-in groove 28, and the outer side of the material collection shell 271 is adapted to the inside of the built-in groove 28.

[0039] The sealing plate 23 is composed of a push block, an arc-shaped bent plate and a straight plate. The outer side of the straight plate is slidably connected to the inner side of the slide groove 22, and the inner side of the straight plate is slidably connected to the outer side of the slide rod 24. The lower end side of the arc-shaped bent plate is designed as an arc-shaped thin edge, and the outer side of the arc-shaped bent plate is slidably connected to the outer side of the lightweight column 21. The outer side of the arc-shaped bent plate is tightly fitted with the outer side of the material extraction shell 271 to prevent the leakage of titanium dioxide in the material extraction shell 271 and the mixing of other titanium dioxide.

[0040] The material taking shell 271 is composed of an arc-edged straight plate and a curved concave arc plate, and the outer side of the curved concave arc plate is designed with a thin edge to reduce the extrusion damage to the titanium dioxide. At the same time, the curved concave arc plate is convenient for the storage of titanium dioxide and prevents the subsequent material taking shell 271 from expanding outward and spilling.

[0041] refer to Figure 1-7During packaging, transportation and storage, titanium dioxide is generally stored in a polyethylene bag of about 500 kg. The bag is opened, and the sampling device for titanium dioxide detection is placed on the titanium dioxide. The lower pressure plate 3 penetrates steadily into the upper surface layer of the titanium dioxide. The top button of the driver 15 is started. The driver 15 is composed of an external line, a servo motor and a mounting plate. The servo motor drives the spiral conveying blade 13 to rotate through the rotating rod 14 in the extraction mechanism 1. The titanium dioxide wrapped by the lower pressure plate 3 is continuously transported upward through the spiral conveying blade 13. The height of the spiral conveying blade 13 is higher than the height of the extraction tube 11. The titanium dioxide continuously transported from the top of the spiral conveying blade 13 falls into the collecting box 12. The titanium dioxide in the lower pressure plate 3 is continuously extracted, and the lower pressure plate 3 continuously penetrates into the interior of the titanium dioxide, driving the sampling mechanism 2 to continuously penetrate into the interior of the titanium dioxide. The lower pressure plate 3 and the extraction mechanism 1 work together. , the titanium dioxide in the cavity surrounded by the lower pressing plate 3 is continuously extracted, which is convenient for the sampling mechanism 2 to quickly slide into the titanium dioxide for sampling. The extracted titanium dioxide forms a sliding channel to avoid the uninterrupted extrusion of the titanium dioxide in the cavity surrounded by the lower pressing plate 3, which causes the titanium dioxide to be extruded, deformed and agglomerated, affecting the inspection. At the same time, it avoids the stress caused by the extrusion of titanium dioxide, and continuously produces extrusion and friction rolling on the titanium dioxide around the sampling mechanism 2, which affects the particle size difference and distribution law of titanium dioxide at different positions. The lower pressing plate 3 is composed of a frustum arc plate and an annular plate. The annular plate is designed with a thin edge. The thickness of the annular plate becomes thinner from the inside to the outside, which reduces the effective contact area between the lower pressing plate 3 and the titanium dioxide, and facilitates the rapid sliding of the lower pressing plate 3. The diameter of the annular plate is larger than the diameter of the sampling mechanism 2, which facilitates the rapid sliding of the sampling mechanism 2, prevents the titanium dioxide around the sampling mechanism 2 from being compressed and deformed, and greatly reduces the fluidity of the titanium dioxide around the sampling mechanism 2;After the lower platen 3 and the sampling mechanism 2 slide into the specified length, the servo motor in the driver 15 stops rotating, the spiral conveying blade 13 stops conveying titanium dioxide, and the lower platen 3 stops moving forward. At this time, the top handle of the slide rod 24 in the sampling mechanism 2 is pulled hard to drive the sealing plate 23 to slide upward in the slide groove 22, driving the strong spring 26 to undergo elastic deformation, and the sealing plate 23 is continuously separated from the material taking shell 271 in the sampler 27. The material taking shell 271 is subjected to the elastic force of the bending spring 273, and the rotating shaft 272 is rotated around The built-in groove 28 rotates, and the material collection shell 271 is composed of an arc-edge straight plate and a curved concave arc plate, and the outer side of the curved concave arc plate is designed with a thin edge, which is convenient for the thin edge of the curved concave arc plate to quickly dig out the titanium dioxide outside the lightweight column 21. At the same time, the thin edge reduces the squeezing of the curved concave arc plate on the titanium dioxide, reduces the change in the physical properties of the titanium dioxide, and the curved concave arc plate is convenient for the storage of titanium dioxide. The material collection shell 271 is designed with several groups evenly distributed on the circumferential side of the lightweight column 21, which is convenient for multiple groups of titanium dioxide samples at different depths in the bag. The detection only needs to be pulled, which is fast and efficient, and the uniformity is consistent, which is convenient for the accuracy of detection. After the handle at the top of the slide bar 24 is loosened, the sealing plate 23 slides again to the top of the material taking shell 271 under the elastic force of the strong spring 26, and squeezes the material taking shell 271, driving the material taking shell 271 to rotate inside the built-in groove 28. The sealing plate 23 fits tightly to the material taking shell 271 and seals the material taking shell 271 to prevent other titanium dioxide from mixing into the material taking shell 271 when the device is taken out, affecting the detection. After the device is taken out as a whole, when it is necessary to detect titanium dioxide at a certain depth and angle, it is only necessary to pull the push block in the sealing plate 23 to drive the curved plate and the straight plate to slide upward, and the curved plate will be separated from the top of the material taking shell 271 at a certain depth and angle, and the corresponding spring group 25 will be elastically deformed, and the material taking shell 271 will be expanded again under the elastic force of the bending spring 273, which is convenient for rapid detection of titanium dioxide at a certain depth and angle. At the same time, the expansion of the material taking shell 271 will not cause titanium dioxide to fall, and it is highly practical. ;

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sampling device for titanium dioxide detection, characterized in that: It comprises an extraction mechanism (1), a sampling mechanism (2) is sleeved on the outer side of the extraction mechanism (1), and a lower pressure plate (3) is fixedly connected to the bottom end of the sampling mechanism (2); The extraction mechanism (1) comprises an extraction tube (11), the outer side of the extraction tube (11) is fixedly connected to the inner side of the sampling mechanism (2), the top of the extraction tube (11) is fixedly connected to a collecting box (12), the bottom of the collecting box (12) is fixedly connected to the top of the sampling mechanism (2), the bottom end of the extraction tube (11) is fixedly connected to the inner side of a lower pressure plate (3), a spiral conveying blade (13) is arranged inside the extraction tube (11), a rotating rod (14) is fixedly connected inside the spiral conveying blade (13), a driver (15) is fixedly installed at the top of the rotating rod (14), and the lower pressure plate (3) is rotatably installed with the bottom end of the rotating rod (14) via a tripod (16) arranged inside the lower pressure plate (3).

2. A sampling device for titanium dioxide detection according to claim 1, characterized in that: The collection box (12) is designed as a cylindrical hollow shell, and a revolving door (17) is rotatably installed inside the cylindrical hollow shell through a hinge group, and a handrail (18) is fixedly connected to the outside of the cylindrical hollow shell.

3. A sampling device for titanium dioxide detection according to claim 1, characterized in that: The driver (15) is composed of an external line, a servo motor and a mounting plate. The servo motor is detachably mounted on the top of the collection box (12) via a mounting plate arranged on the outside of the servo motor. The interior of the servo motor is fixedly connected to the top of the rotating rod (14).

4. A sampling device for titanium dioxide detection according to claim 1, characterized in that: The lower pressure plate (3) is composed of a truncated cone arc plate and an annular plate. The bottom end of the extraction tube (11) is fixedly connected to the inner side of the truncated cone arc plate. The outer side of the tripod (16) is fixedly connected to the inner side of the annular plate. The annular plate is designed with a thin edge, and the thickness of the annular plate gradually becomes thinner from the inside to the outside. The diameter of the annular plate is larger than the diameter of the sampling mechanism (2).

5. A sampling device for titanium dioxide detection according to claim 1, characterized in that: The sampling mechanism (2) comprises a lightweight column (21), the inner side of the lightweight column (21) is fixedly connected to the outer side of the extraction tube (11), the top end of the lightweight column (21) is fixedly connected to the bottom of the collection box (12), the bottom end of the lightweight column (21) is fixedly connected to the outer side of the lower pressure plate (3), a plurality of groups of slide grooves (22) are provided inside the lightweight column (21), a sealing plate (23) is slidably connected inside the plurality of slide grooves (22), a sliding rod (24) is slidably connected inside the sealing plate (23), a spring group (25) is sleeved on the outer side of the sliding rod (24), the bottom end of the spring group (25) is fixedly connected to the top of the sealing plate (23), the sliding rod (24) is fixedly connected to the inner bottom of the sliding groove (22) via a strong spring (26) arranged at its bottom end, and a sampler (27) is arranged inside the sealing plate (23).

6. A sampling device for titanium dioxide detection according to claim 5, characterized in that: A plurality of groups of built-in grooves (28) are provided inside the lightweight column (21), and a plurality of the built-in grooves (28) are located between adjacent slide grooves (22). The sampler (27) comprises a material taking shell (271), and the material taking shell (271) is rotatably connected to the inside of the built-in groove (28) via a rotating shaft (272) arranged inside the material taking shell (271). A bending spring (273) is fixedly connected to the bottom of the material taking shell (271), and one end of the bending spring (273) away from the material taking shell (271) is fixedly connected to the inner wall of the built-in groove (28), and the outer side of the material taking shell (271) is adapted to the inside of the built-in groove (28).

7. A sampling device for titanium dioxide detection according to claim 6, characterized in that: The sealing plate (23) is composed of a push block, an arc-shaped bent plate and a straight plate. The outer side of the straight plate is slidably connected to the inner side of the slide groove (22), and the inner side of the straight plate is slidably connected to the outer side of the slide rod (24). The lower end side of the arc-shaped bent plate is designed as an arc-shaped thin edge. The outer side of the arc-shaped bent plate is slidably connected to the outer side of the lightweight column (21), and the outer side of the arc-shaped bent plate is tightly fitted with the outer side of the material extraction shell (271).

8. A sampling device for titanium dioxide detection according to claim 6, characterized in that: The material taking shell (271) is composed of a straight plate with an arc edge and a curved concave arc plate, and the outer side of the curved concave arc plate is designed with a thin edge.

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