A film sampling device

Abstract

The utility model discloses a kind of film sampling devices, belong to membrane material sampling device technical field, including base, the base top is fixedly connected with sampling bin, sampling bin side is hingedly provided with taking and placing cover, the sampling bin rear wall is provided with the placing assembly for placing the finished product membrane material wound on core pipe, the sampling bin inside is equipped with the sampling assembly for sampling the membrane material on finished product membrane material. The utility model membrane material sampling whole process is carried out in closed sampling bin, can isolate external object, prevent membrane material from scratch or breakage due to friction, collision, simultaneously, by the fixed clamping rod and the moving clamping rod matched with the width of membrane material, membrane material is evenly clamped, can avoid the uneven problem of pulling force when artificial pulling, prevent membrane surface wrinkle, tensile deformation, ensure sampling integrity, the moving wheel of base and handle are directly pushed to detection area after sampling, and reduce secondary injury and pollution risk.

Description

Technical Field

[0001] This utility model relates to a thin film sampling device, belonging to the technical field of membrane material sampling devices. Background Technology

[0002] Polymer films are widely used in various industries. Material companies mostly process film materials in roll form. Sampling and inspection of raw materials, semi-finished products and finished products are key links in quality control. Therefore, a film sampling device is needed to sample film materials.

[0003] The mainstream method for sampling membrane materials in the industry still relies on manual operation. The specific process is as follows: the operator manually pulls the rolled membrane material open, cuts a certain number of meters of sample according to the inspection requirements, and then transports the sample to the testing department by manual handling.

[0004] However, the above solution has the following shortcomings in practical use:

[0005] When manually sampling membrane materials, it is difficult to ensure uniform tension. Furthermore, the membrane material is prone to friction or collision with surrounding objects during the operation, which can lead to problems such as wrinkles and stretching deformation on the membrane surface. This is especially true for membrane materials in multi-layer components such as composite films, where deformation can damage the interlayer bonding and directly affect the integrity of the sample. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a thin film sampling device.

[0007] The technical solution adopted by this utility model to solve its technical problem is:

[0008] A film sampling device includes a base, a sampling chamber fixedly connected to the top of the base, a pick-and-place cover hinged to one side of the sampling chamber, and a placement component for placing the finished film material wound on the core tube on the rear wall of the sampling chamber.

[0009] The sampling chamber is equipped with a sampling component for sampling the film material on the finished film material.

[0010] Preferably, the placement assembly includes an air shaft and a first stepper motor, the air shaft is disposed inside the sampling chamber, and the end of the air shaft is rotatably connected to the inner surface of the rear wall of the sampling chamber;

[0011] The side wall of the first stepper motor is fixedly connected to the rear wall of the sampling chamber, and the output shaft of the first stepper motor is fixedly connected to the end of the air expansion shaft.

[0012] In this scheme, after the finished film material wound on the core tube is placed on the air expansion shaft, the moving parts on the outer periphery of the air expansion shaft can be expanded by inflating the air expansion shaft valve port, thereby completing the fixation of the finished film material.

[0013] Preferably, the sampling assembly includes a winding structure for winding the film material and a moving structure for moving the end of the finished film material wound on the core tube to the center of the winding assembly.

[0014] Preferably, the winding structure includes a mounting plate, which is detachably connected to the front side of the sampling chamber. A sampling cylinder is rotatably mounted on one side of the mounting plate, and a second stepper motor is fixedly connected to the other side of the mounting plate. The output shaft of the second stepper motor is fixedly connected to the end of the sampling cylinder.

[0015] The sampling cylinder is open at the end away from the second stepper motor, and through slots are provided on both sides of the sampling cylinder.

[0016] In this scheme, when the end of the finished film material wound on the core tube is clamped and moved by the moving structure, and passes through the through groove on the outer periphery of the sampling cylinder and moves to the center position of the sampling cylinder and is fixed, the sampling cylinder is driven to rotate by the second stepper motor. The sampling cylinder can wind the section of film material to be tested around the outer periphery of the sampling cylinder. When it is necessary to remove this section of film material, the moving structure is first stopped to clamp the end of the film material. Then, the film material to be tested can be removed by rotating the sampling roller in the opposite direction and directly extracting the film material. Alternatively, the mounting plate and the sampling cylinder connected to it can be removed. In this way, the sampling cylinder and the film material to be tested can be removed at the same time.

[0017] Preferably, the movable structure includes a mounting frame, the front side of which is fixedly connected to the rear wall of the sampling chamber, and a sliding groove is provided through the rear wall of the sampling chamber at the corresponding position of the mounting frame. A movable component is provided inside the sliding groove. The movable component is U-shaped and has two guide grooves on its surface. The movable component is slidably connected to the inner wall of the sliding groove through the two guide grooves.

[0018] The inner wall of the mounting frame is rotatably provided with a first threaded rod, and a drive sleeve is threadedly connected to the outer circumference of the first threaded rod. The top of the drive sleeve is fixedly connected to the moving part. A third stepper motor is fixedly connected to the side wall of the mounting frame, and the output shaft of the third stepper motor is fixedly connected to the first threaded rod.

[0019] A through groove is provided in the middle of the movable part, and a clamping component is provided on the side wall of the movable part;

[0020] In this scheme, by starting the third stepper motor and controlling its rotation direction, the first threaded rod can be driven to rotate in the forward or reverse direction. At the same time, the first threaded rod can drive the drive sleeve connected to it to move along the axis of the first threaded rod, and the drive sleeve can drive the moving part to move synchronously and adjust the position of the moving part relative to the outer periphery of the first threaded rod, thereby completing the adjustment of the clamping component.

[0021] Preferably, the clamping component includes a fixed clamping rod, a second threaded rod, and a fourth stepper motor, wherein the side wall of the fixed clamping rod is fixedly connected to the moving part;

[0022] The top and bottom of the second threaded rod are rotatably connected to the inner wall of the moving part. A connecting rod is threadedly connected to the middle of the second threaded rod. A stabilizing rod is provided through the middle of the connecting rod. Both ends of the stabilizing rod are fixedly connected to the inner wall of the moving part. The connecting rod and the stabilizing rod are slidably connected.

[0023] The bottom of the fourth stepper motor is fixedly connected to the moving part, and the output shaft of the fourth stepper motor is fixedly connected to the second threaded rod;

[0024] The end of the connecting rod is provided with a through groove, and a movable clamping rod is fixedly connected to the end of the connecting rod, the movable clamping rod being matched with the fixed clamping rod;

[0025] In this design, starting the fourth stepper motor to rotate forward or backward can drive the second threaded rod to rotate forward or backward. Simultaneously, the second threaded rod can drive the connecting rod connected to it to move along the axis of the second furnace temperature rod. The connecting rod can also drive the movable clamping rod to move synchronously and adjust its position. When the movable clamping rod moves upward and abuts against the fixed clamping rod, it can clamp the membrane material passing between the movable and fixed clamping rods. Because the lengths of the movable and fixed clamping rods match the width of the membrane material, pulling the end of the membrane material after clamping it can make the force on the membrane material more uniform, thus avoiding wrinkling of the membrane material due to uneven force.

[0026] Preferably, the base is provided with four casters at the bottom, and a handle is fixedly connected to the side wall of the base;

[0027] This solution incorporates casters on the base, allowing for easy movement of the membrane material directly to the testing area via a handle after sampling, thus avoiding secondary transfer of the membrane material. Furthermore, since the membrane material is in a closed environment within the sampling chamber, it is protected from contamination by dust and other external substances during the transfer process.

[0028] Preferably, a snap-fit ​​structure is provided between the pick-up and drop-off cover and the sampling chamber, the snap-fit ​​structure including a handle and a locking block, the locking block matching the handle;

[0029] In this solution, a handle is provided to facilitate the opening and closing of the retrieval cover, and the locking block can engage with the handle when the retrieval cover is closed, thereby facilitating the locking of the retrieval cover;

[0030] Preferably, a first silicone pad is fixedly connected to the bottom of the fixed clamping rod, and a second silicone pad is fixedly connected to the top of the movable clamping rod;

[0031] In this solution, the silicone pad has a certain degree of elasticity, which can buffer the pressure during clamping and increase the friction with the membrane material to prevent the membrane material from slipping during movement.

[0032] Preferably, the length of the fixed clamping rod matches the length of the sampling cylinder, and the length of the movable clamping rod matches the length of the sampling cylinder;

[0033] In this scheme, the length of the sampling tube is matched with the width of the membrane material to be sampled. By using fixed clamping rods and movable clamping rods that match the width of the membrane material to evenly clamp the membrane material, the problem of uneven pulling force when manually pulling can be avoided.

[0034] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0035] 1. The entire membrane sampling process is carried out in a closed sampling chamber, which can isolate external objects and prevent the membrane from being scratched or damaged due to friction or collision. At the same time, the membrane is evenly clamped by fixed and movable clamping rods that match the width of the membrane, which can avoid the problem of uneven tension when manually pulling it, prevent membrane wrinkles and stretching deformation, protect the interlayer bonding state of the composite film, ensure the integrity of the sampling, and provide accurate samples for subsequent testing.

[0036] 2. The air shaft can quickly fix the finished membrane material wound on the core tube. Combined with the multi-step motor driven moving and winding structure, it simplifies the traditional manual pulling and cutting process, reduces manual reliance and labor intensity. After sampling, the base's moving wheels and handle make it easy to push the device directly to the testing area after sampling. The closed sampling chamber can prevent the membrane material from being contaminated by dust during transfer, reducing the risk of secondary damage and contamination. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the components shown in these drawings without creative effort.

[0038] Figure 1 This is a first-view perspective perspective view of the present invention;

[0039] Figure 2 This is a second-view perspective perspective view of the present invention;

[0040] Figure 3 An exploded view of the sampling chamber of this utility model;

[0041] Figure 4 This is a schematic diagram of the winding structure of this utility model;

[0042] Figure 5 This is a schematic diagram of the movable structure of this utility model;

[0043] Figure 6 This is a partial structural diagram of the clamping component of this utility model;

[0044] Figure 7 This utility model Figure 2 Enlarged view of the A-section structure;

[0045] Figure 8 This utility model Figure 5 Enlarged view of the structure of section B;

[0046] Figure 9 This utility model Figure 5 Enlarged view of the C-section structure.

[0047] In the picture:

[0048] 1. Base; 11. Sampling chamber; 12. Placement cover;

[0049] 2. Component placement; 21. Air shaft; 22. First stepper motor;

[0050] 3. Sampling components;

[0051] 31. Rewinding structure; 311. Mounting plate; 312. Sampling cylinder; 313. Second stepper motor; 314. Through slot;

[0052] 32. Moving structure; 321. Mounting frame; 322. Slide groove; 323. Moving part; 324. First threaded rod; 325. Drive sleeve; 326. Third stepper motor; 327. Through slot;

[0053] 328. Clamping component; 329. Guide groove;

[0054] 3281. Fixed clamping rod; 3282. Second threaded rod; 3283. Fourth stepper motor;

[0055] 3284. Connecting rod; 3285. Stabilizing rod; 3286. Moving clamping rod;

[0056] 4. Casters; 5. Handlebars;

[0057] 6. Snap-fit ​​structure; 61. Handle; 62. Locking block;

[0058] 7. First silicone pad; 8. Second silicone pad. Detailed Implementation

[0059] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0060] Please see Figure 1 , Figure 2 and Figure 3 This utility model provides a technical solution:

[0061] A film sampling device includes a base 1, a sampling chamber 11 fixedly connected to the top of the base 1, a pick-and-place cover 12 hinged to one side of the sampling chamber 11, and a placement component 2 for placing the finished film material wound on the core tube on the rear wall of the sampling chamber 11.

[0062] The sampling chamber 11 is equipped with a sampling component 3 for sampling the film material on the finished film material.

[0063] For further information, please refer to [link / reference]. Figure 3 The placement component 2 includes an air shaft 21 and a first stepper motor 22. The air shaft 21 is located inside the sampling chamber 11, and the end of the air shaft 21 is rotatably connected to the inner surface of the rear wall of the sampling chamber 11.

[0064] The side wall of the first stepper motor 22 is fixedly connected to the rear wall of the sampling chamber 11, and the output shaft of the first stepper motor 22 is fixedly connected to the end of the air expansion shaft 21.

[0065] Specifically, the main body of the air shaft 21 is made of high-strength seamless steel pipe, which combines good rigidity and lightweight characteristics, avoiding deformation problems caused by long-term support of the membrane roll. Its outer movable expansion parts are made of aging-resistant nitrile rubber. This material not only has strong elastic recovery ability, which can tightly fit the membrane core tubes of different inner diameters after inflation, but also has excellent wear resistance, which can reduce the wear caused by long-term contact with the inner wall of the core tube, extend the service life of the air shaft 21, and prevent rubber debris from falling off and contaminating the membrane surface.

[0066] For further information, please refer to [link / reference]. Figure 3 The sampling assembly 3 includes a winding structure 31 for winding the film material and a moving structure 32 for moving the end of the finished film material wound on the core tube to the center of the winding assembly.

[0067] For further information, please refer to [link / reference]. Figure 4The winding structure 31 includes a mounting plate 311, which is detachably connected to the front side of the sampling chamber 11. A sampling cylinder 312 is rotatably mounted on one side of the mounting plate 311, and a second stepper motor 313 is fixedly connected to the other side of the mounting plate 311. The output shaft of the second stepper motor 313 is fixedly connected to the end of the sampling cylinder 312.

[0068] The sampling cylinder 312 is open at one end away from the second stepper motor 313, and through slots 314 are provided on both sides of the sampling cylinder 312.

[0069] Specifically, the sampling cylinder 312 is made of 304 stainless steel, and the edges of the through groove 314 are rounded to prevent the membrane material from being scratched when it passes through.

[0070] For further information, please refer to [link / reference]. Figure 5 The movable structure 32 includes a mounting frame 321. The front side of the mounting frame 321 is fixedly connected to the rear wall of the sampling chamber 11. A sliding groove 322 is provided through the rear wall of the sampling chamber 11 at the corresponding position of the mounting frame 321. A movable part 323 is provided inside the sliding groove 322. The movable part 323 is U-shaped. Two guide grooves 329 are opened on the surface of the movable part 323. The movable part 323 is slidably connected to the inner wall of the sliding groove 322 through the two guide grooves 329.

[0071] The inner wall of the mounting frame 321 is rotatably provided with a first threaded rod 324, and the outer circumference of the first threaded rod 324 is threadedly connected to a drive sleeve 325. The top of the drive sleeve 325 is fixedly connected to the moving part 323. The side wall of the mounting frame 321 is fixedly connected to a third stepper motor 326, and the output shaft of the third stepper motor 326 is fixedly connected to the first threaded rod 324.

[0072] A through groove 327 is provided through the middle of the movable part 323, and a clamping part 328 is provided on the side wall of the movable part 323;

[0073] Specifically, both the first threaded rod 324 and the second threaded rod 3282 are made of 40Cr alloy structural steel. After quenching and tempering and surface nitriding, they not only have high strength and high hardness, which can withstand the load generated by long-term threaded transmission, but also have excellent wear resistance and corrosion resistance. This can prevent thread corrosion and jamming caused by changes in environmental humidity or slight dust adhesion, and ensure that the drive sleeve 325 and the connecting rod 3284 can slide smoothly along the threaded rod, thus ensuring the movement accuracy of the moving structure 32 and the clamping component 328.

[0074] For further information, please refer to [link / reference]. Figure 5 The clamping component 328 includes a fixed clamping rod 3281, a second threaded rod 3282 and a fourth stepper motor 3283. The side wall of the fixed clamping rod 3281 is fixedly connected to the moving component 323.

[0075] The top and bottom of the second threaded rod 3282 are rotatably connected to the inner wall of the moving part 323. A connecting rod 3284 is threadedly connected to the middle of the second threaded rod 3282. A stabilizing rod 3285 is provided through the middle of the connecting rod 3284. Both ends of the stabilizing rod 3285 are fixedly connected to the inner wall of the moving part 323. The connecting rod 3284 and the stabilizing rod 3285 are slidably connected.

[0076] The bottom of the fourth stepper motor 3283 is fixedly connected to the moving part 323, and the output shaft of the fourth stepper motor 3283 is fixedly connected to the second threaded rod 3282;

[0077] The end of the connecting rod 3284 is provided through the through groove 327, and the end of the connecting rod 3284 is fixedly connected to the movable clamping rod 3286, which is matched with the fixed clamping rod 3281.

[0078] For further information, please refer to [link / reference]. Figure 1 The base 1 has four casters 4 at its bottom and a handle 5 fixedly connected to the side wall of the base 1;

[0079] Specifically, the movable wheels 4 at the bottom of the base 1 adopt a polyurethane wheel body with a ball bearing structure. The polyurethane wheel body has good shock absorption performance, which can reduce the impact of ground bumps on the membrane material inside the sampling chamber 11 when the device is moved, and prevent the membrane material from shifting or wrinkling due to vibration. The ball bearing setting can reduce the frictional resistance when the movable wheels 4 rotate, so that the device can be easily moved on the ground in different scenarios such as laboratories and workshops. At the same time, it can prevent the wheels from getting stuck after long-term use, and improve the convenience of device transfer.

[0080] For further information, please refer to [link / reference]. Figure 7 A snap-fit ​​structure 6 is provided between the take-up cover 12 and the sampling chamber 11. The snap-fit ​​structure 6 includes a handle 61 and a snap block 62, and the snap block 62 matches the handle 61.

[0081] Specifically, in the latching structure 6 between the pick-up and place cover 12 and the sampling chamber 11, the handle 61 is made of ABS engineering plastic and is ergonomically designed in an arc shape, making it easy for operators to hold and exert force with one hand to easily open or close the pick-up and place cover 12; the latch 62 is made of wear-resistant nylon material and has a matching concave-convex structure design with the latching surface of the handle 61, which can form a stable latching force when latched, preventing the pick-up and place cover 12 from being accidentally opened during device movement or sampling. At the same time, the toughness of the nylon material can reduce the wear caused by the long-term latching of the latch 62 and the handle 61, and extend the service life of the latching structure 6.

[0082] For further information, please refer to [link / reference]. Figure 9 The bottom of the fixed clamping rod 3281 is fixedly connected to the first silicone pad 7, and the top of the movable clamping rod 3286 is fixedly connected to the second silicone pad 8.

[0083] For further information, please refer to [link / reference]. Figure 3 The length of the fixed clamping rod 3281 matches the length of the sampling cylinder 312, and the length of the movable clamping rod 3286 matches the length of the sampling cylinder 312.

[0084] The workflow of this embodiment is as follows:

[0085] Finished membrane material fixing stage:

[0086] First, manually place the finished film material, wound onto the core tube, onto the air expansion shaft 21 on the rear wall of the sampling chamber 11. Inflate the valve port of the air expansion shaft 21 to expand the outer peripheral moving parts of the air expansion shaft 21 and tightly fit the inner wall of the core tube, thus stabilizing and fixing the finished film material. At the same time, manually pass the end of the finished film material on the roll through the fixed clamping rod 3281 and the movable clamping rod 3286 on the moving part 323 to prepare for subsequent clamping operations.

[0087] Membrane end clamping and positioning:

[0088] When clamping the end of the membrane material, the fourth stepper motor 3283 of the clamping component 328 is started, and its output shaft drives the second threaded rod 3282 to rotate. The connecting rod 3284, which is threaded to the second threaded rod 3282, slides along the stabilizing rod 3285, which is fixed at both ends to the inner wall of the moving part 323. This pushes the movable clamping rod 3286 at the end of the connecting rod 3284 to approach and abut against the fixed clamping rod 3281, thus stably clamping the end of the membrane material that passes between the fixed clamping rod 3281 and the movable clamping rod 3286.

[0089] When positioning the end of the membrane material: the third stepper motor 326 of the moving structure 32 is started, driving the first threaded rod 324 in the mounting frame 321 to rotate in the forward or reverse direction. The drive sleeve 325, which is threadedly connected to the first threaded rod 324, moves along the axis of the threaded rod. Since the top of the drive sleeve 325 is fixed to the U-shaped moving part 323, and the moving part 323 is slidably set in the slide groove 322 on the rear wall of the sampling chamber 11 through two guide grooves 329, the drive sleeve 325 drives the moving part 323 to slide synchronously along the slide groove 322. After the moving part 323 moves to the appropriate position, the clamped end of the membrane material moves to the middle of the sampling cylinder 312 after passing through the through groove 314 on the outer periphery of the sampling cylinder 312, thus completing the positioning and fixing of the end of the membrane material.

[0090] Membrane material winding and sampling stage:

[0091] The second stepper motor 313 of the winding structure 31 is started, and its output shaft drives the sampling cylinder 312 to rotate. The sampling cylinder 312 evenly winds the section of film material to be tested around the outer circumference of the sampling cylinder 312. After winding is completed, the film material is manually cut off. Then the air shaft 21 is depressurized, causing the outer peripheral moving parts to contract. The roll still containing the remaining finished film material is removed from the air shaft 21 and returned to its original position.

[0092] Transfer of membrane material after sampling:

[0093] Using the four casters 4 at the bottom of the base 1 and the handle 61 fixed to the side wall, the device is pushed to the testing equipment. The wound membrane material can be directly extracted by rotating the sampling cylinder 312 in the opposite direction, or the mounting plate 311 that is detachably connected to the front of the sampling chamber 11 can be removed together with the sampling cylinder 312 to realize the transportation of the sampling cylinder 312 with the wound membrane material to the testing equipment.

[0094] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A thin film sampling device, comprising a base (1), characterized in that, The base (1) is fixedly connected to the top of a sampling chamber (11), and a pick-up and put-down cover (12) is hinged to one side of the sampling chamber (11). The rear wall of the sampling chamber (11) is provided with a placement component (2) for placing the finished film material wound on the core tube. The sampling chamber (11) is equipped with a sampling component (3) for sampling the film material on the finished film material.

2. The thin-film sampling device according to claim 1, characterized in that, The placement assembly (2) includes an air shaft (21) and a first stepper motor (22). The air shaft (21) is disposed inside the sampling chamber (11), and the end of the air shaft (21) is rotatably connected to the inner surface of the rear wall of the sampling chamber (11). The side wall of the first stepper motor (22) is fixedly connected to the rear wall of the sampling chamber (11), and the output shaft of the first stepper motor (22) is fixedly connected to the end of the air expansion shaft (21).

3. The thin-film sampling device according to claim 1, characterized in that, The sampling assembly (3) includes a winding structure (31) for winding the film material and a moving structure (32) for moving the end of the finished film material wound on the core tube to the center of the winding assembly.

4. A thin-film sampling device according to claim 3, characterized in that, The winding structure (31) includes a mounting plate (311), which is detachably connected to the front side of the sampling chamber (11). A sampling cylinder (312) is rotatably mounted on one side of the mounting plate (311), and a second stepper motor (313) is fixedly connected to the other side of the mounting plate (311). The output shaft of the second stepper motor (313) is fixedly connected to the end of the sampling cylinder (312). The sampling cylinder (312) is open at one end away from the second stepper motor (313), and through slots (314) are provided on both sides of the sampling cylinder (312).

5. A thin-film sampling device according to claim 4, characterized in that, The movable structure (32) includes a mounting frame (321), the front side of which is fixedly connected to the rear wall of the sampling chamber (11). A sliding groove (322) is provided through the rear wall of the sampling chamber (11) at the corresponding position of the mounting frame (321). A movable component (323) is provided inside the sliding groove (322). The movable component (323) is U-shaped. Two guide grooves (329) are provided on the surface of the movable component (323). The movable component (323) is slidably connected to the inner wall of the sliding groove (322) through the two guide grooves (329). The inner wall of the mounting frame (321) is rotatably provided with a first threaded rod (324), and the outer circumference of the first threaded rod (324) is threadedly connected with a drive sleeve (325). The top of the drive sleeve (325) is fixedly connected to the moving part (323). The side wall of the mounting frame (321) is fixedly connected with a third stepper motor (326), and the output shaft of the third stepper motor (326) is fixedly connected to the first threaded rod (324). The moving part (323) has a through groove (327) through its middle, and the moving part (323) has a clamping component (328) on its side wall.

6. A thin-film sampling device according to claim 5, characterized in that, The clamping component (328) includes a fixed clamping rod (3281), a second threaded rod (3282), and a fourth stepper motor (3283). The side wall of the fixed clamping rod (3281) is fixedly connected to the moving part (323). The top and bottom of the second threaded rod (3282) are rotatably connected to the inner wall of the moving part (323). A connecting rod (3284) is threadedly connected to the middle of the second threaded rod (3282). A stabilizing rod (3285) is provided through the middle of the connecting rod (3284). Both ends of the stabilizing rod (3285) are fixedly connected to the inner wall of the moving part (323). The connecting rod (3284) and the stabilizing rod (3285) are slidably connected. The bottom of the fourth stepper motor (3283) is fixedly connected to the moving part (323), and the output shaft of the fourth stepper motor (3283) is fixedly connected to the second threaded rod (3282); The end of the connecting rod (3284) is provided with a through groove (327), and a movable clamping rod (3286) is fixedly connected to the end of the connecting rod (3284). The movable clamping rod (3286) is matched with the fixed clamping rod (3281).

7. A thin-film sampling device according to claim 1, characterized in that, The base (1) is provided with four casters (4) at the bottom, and a handle (5) is fixedly connected to the side wall of the base (1).

8. A thin-film sampling device according to claim 1, characterized in that, A snap-fit ​​structure (6) is provided between the pick-up and drop-off cover (12) and the sampling chamber (11). The snap-fit ​​structure (6) includes a handle (61) and a locking block (62), and the locking block (62) matches the handle (61).

9. A thin-film sampling device according to claim 6, characterized in that, The bottom of the fixed clamping rod (3281) is fixedly connected to a first silicone pad (7), and the top of the movable clamping rod (3286) is fixedly connected to a second silicone pad (8).

10. A thin-film sampling device according to claim 6, characterized in that, The length of the fixed clamping rod (3281) matches the length of the sampling tube (312), and the length of the movable clamping rod (3286) matches the length of the sampling tube (312).

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