Food pollutant sampling device for MOF material experiment

Abstract

The invention belongs to the technical field of food detection, and discloses a food pollutant sampling device for MOF material experiments, which comprises a pipe body, a moving rod arranged at the top of the pipe body, a telescopic rod fixedly mounted at the bottom of the moving rod, a piston fixedly mounted at the bottom of the telescopic rod and movably connected with the inner wall of the pipe body, and a sampling head fixedly mounted at the bottom of the pipe body. A protective shell is arranged outside the pipe body, a button is arranged at one end of the protective shell, a fixing block is fixedly mounted at one end of the pipe body, a mounting plate is arranged at the bottom of the fixing block, and an electric push rod is fixedly mounted at the top of the mounting plate. The length of the sampling tube can be increased through movement of the protective shell, containers with different lengths and sizes can be sampled conveniently, meanwhile, the bottom of the sampling tube is supported through the first supporting rod and the second supporting rod, a certain distance is kept between the sampling head and the bottom of the container, the sampling head is prevented from touching the bottom of the container, and liquid is prevented from entering the tube smoothly; and the sample is polluted, so that the sampling accuracy is influenced.

Description

Technical Field

[0001] The invention belongs to the technical field of food detection, and in particular relates to a food contaminant sampling device for MOF material experiments. Background Art

[0002] MOF stands for "metal organic framework material", which is a new type of functional material. It is formed by coordination bonding between metal ions and organic framework molecules. MOF materials have a highly ordered pore structure and can be used in gas storage, chemical separation, catalytic reactions and other fields. Due to the characteristics of highly ordered pore structure and reversibility of MOF materials, they have broad application prospects in many fields. For example, they can be used to prepare high-efficiency catalysts, high-efficiency adsorbents, high-performance sensors, etc. In addition, MOF materials can also be used in gas storage and separation, adsorption of atmospheric pollutants and other fields. When experimenting with MOF materials, it is necessary to use a food contaminant sampling device to take samples for detection tests.

[0003] However, in the prior art, sampling needs to be performed through a sampling tube, and the sampling tube cannot be adjusted according to the length of the sample container. At the same time, when the sampling tube is placed in the sample container, the bottom of the sampling tube is likely to touch the bottom of the container, affecting the smooth entry of the liquid into the tube and contaminating the sample, thereby affecting the accuracy of the sampling. Summary of the invention

[0004] The present invention aims at the problems in the prior art and proposes the following technical solutions: a food contaminant sampling device for MOF material experiments, comprising a tube body, a moving rod is arranged on the top of the tube body, a telescopic rod is fixedly installed on the bottom of the moving rod, a piston is fixedly installed on the bottom of the telescopic rod, the piston is movably connected to the inner wall of the tube body, a sampling head is fixedly installed on the bottom of the tube body, a protective shell is arranged on the outside of the tube body, a button is arranged on one end of the protective shell, a fixed block is fixedly installed on one end of the tube body, a mounting plate is arranged on the bottom of the fixed block, an electric push rod is fixedly installed on the top of the mounting plate, a round convex is fixedly installed on the top of the electric push rod, and the four corners of the fixed block are fixedly provided with a protective shell. A mounting groove is provided at the bottom, a moving opening is provided at the bottom of the mounting groove, a moving block is movably connected inside the mounting groove, a first magnetic block is fixedly installed on one side of the moving block, and a connecting spring is fixedly installed on the other side, one end of the connecting spring is fixedly installed on the inner wall of the mounting groove, a second magnetic block is fixedly installed on the inner wall of the protective block, the first magnetic block is magnetically connected to the second magnetic block, a connecting ring is fixedly installed at the bottom of the protective shell and at the top end of the tube body, a first support rod is fixedly installed at the bottom of the connecting ring, a second support rod is arranged inside one end of the first support rod, a moving structure is arranged on the top of the connecting ring, and the moving structure is symmetrically arranged around the center of the tube body.

[0005] As a preferred embodiment of the above technical solution, the button is electrically connected to the electric push rod, the moving rod is located at the top of the protective shell, a round hole is provided at the bottom of the protective shell, the first support rod is located on both sides of the sampling head, a slide groove is provided on one side of the protective shell, and an adjustment structure is provided inside the slide groove and on one side of the protective shell.

[0006] As a preferred embodiment of the above technical solution, the mounting plate is fixedly installed on the tube body, the convex protrusion is arranged corresponding to the moving port, the moving block is L-shaped, the side of the moving block close to the moving port is an inclined surface, the electric push rod and the convex protrusion extend through the moving port to the inclined surface of the moving block, the number of the first magnetic blocks is the same as the number of the second magnetic blocks, and they are arranged corresponding to the moving block.

[0007] As a preferred embodiment of the above technical solution, movable openings are opened at both ends of the top of the connecting ring, and the movable openings pass through the middle of the first support rod. A movable plate is movably connected inside the first support rod, a compression spring is fixedly installed at the bottom of the movable plate, and a second support rod is fixedly installed at the bottom of the compression spring.

[0008] As a preferred embodiment of the above technical solution, the movable structure includes a first rack, one side of the first rack is fixedly installed on the inner wall of the protective shell, a gear is provided on one side of the first rack, a rotating rod is fixedly installed in the middle of the gear, mounting rings are provided at both ends of the rotating rod, the inner wall of the mounting ring is fixedly installed on the tube body, mounting openings are opened at both ends of the mounting ring, both ends of the rotating rod are rotatably connected to the mounting openings, a second rack is meshed with one side of the gear, and a push rod is fixedly installed at the bottom of the second rack.

[0009] As a preferred embodiment of the above technical solution, the first rack is located above the second rack, the first rack and the second magnetic block are arranged in a cross-symmetrical manner, one end of the second rack is located at the installation port, the second rack is slidably connected to the outer side of the tube body away from the gear side, and the gear and the second rack are located at the top of the circular hole.

[0010] As a preferred embodiment of the above technical solution, one end of the push rod extends through the movable opening to the top of the movable plate, the compression spring is in a compressed state, the second support rod extends through the movable opening to the bottom of the first support rod, and the bottom end of the second support rod is located below the sampling head.

[0011] As a preferred embodiment of the above technical solution, the adjustment structure includes a slider, a strip-shaped opening is opened in the middle of the slider, a movable rod is rotatably connected to the inner wall of the strip-shaped opening, a connecting block is fixedly installed in the middle of the movable rod, a groove is opened inside the connecting block, a fixed spring is fixedly installed on the inner wall of the groove, and a sealing cover is fixedly installed on one end of the fixed spring.

[0012] As a preferred embodiment of the above technical solution, limiting grooves are provided on both sides of the slide groove, limiting blocks are fixedly installed on both sides of the slide block, the limiting blocks are slidably connected to the limiting grooves, and a clamping block is fixedly installed at one end of the bottom of the cover.

[0013] The beneficial effects of the present invention are:

[0014] (1) The present invention can increase the length of the sampling tube by moving the protective shell, which is convenient for sampling containers of different lengths. At the same time, the bottom of the sampling tube is supported by the first support rod and the second support rod, so that the sampling head maintains a certain distance from the bottom of the container, preventing the sampling head from touching the bottom of the container, affecting the smooth entry of the liquid into the tube, and contaminating the sample, thereby affecting the accuracy of sampling;

[0015] (2) The present invention moves the slider and rotates the cover, and pulls the cover through the block so that the cover can be stuck on one side of the container to support the tube body. When the tube body is placed for sampling, it will shake, affecting the sampling. After the sampling is completed, the protective shell is moved so that the tube body and the sampling head can be moved into the protective shell, and then the slider is moved to the bottom of the protective shell, and the sealing cover is rotated so that the cover and the block can be pressed against the bottom of the protective shell for shielding and protection, thereby preventing the sampling head from being damaged and facilitating use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 What is shown is a schematic diagram of the overall structure of the embodiment;

[0017] Figure 2 What is shown is the structural diagram of the protective shell and the sampling head of the embodiment;

[0018] Figure 3 Shown is a cross-sectional view of the overall structure of the embodiment;

[0019] Figure 4 The embodiment shown is Figure 3 A magnified image of point A;

[0020] Figure 5 Shown is a top cross-sectional view of an embodiment protective housing;

[0021] Figure 6 What is shown is the internal structure diagram of the protective shell of the embodiment;

[0022] Figure 7 Shown is a structural diagram of a fixing block and a mounting plate of an embodiment;

[0023] Figure 8 What is shown is the internal structure diagram of the fixed block of the embodiment;

[0024] Fig. 9 Shown is a block diagram of an embodiment regulation structure.

[0025] In the figure: 1, tube body; 2, moving rod; 3, telescopic rod; 4, piston; 5, sampling head; 6, protective shell; 7, button; 8, fixed block; 9, mounting plate; 10, electric push rod; 11, round convex; 12, moving block; 13, first magnetic block; 14, connecting spring; 15, second magnetic block; 16, connecting ring; 17, first support rod; 18, adjustment structure; 181, slider; 182, movable rod; 183, connecting block; 184, fixed spring; 185, cover; 19, moving plate; 20, compression spring; 21, second support rod; 22, first rack; 23, gear; 24, rotating rod; 25, mounting ring; 26, second rack; 27, pushing rod; 28, block; 29, limiting block. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0027] The present invention provides a food contaminant sampling device for MOF material experiments, such as Figures 1 to 8 As shown, it includes a tube body 1, a moving rod 2 is arranged on the top of the tube body 1, a telescopic rod 3 is fixedly installed on the bottom of the moving rod 2, a piston 4 is fixedly installed on the bottom of the telescopic rod 3, the piston 4 is movably connected to the inner wall of the tube body 1, a sampling head 5 is fixedly installed on the bottom of the tube body 1, a protective shell 6 is arranged on the outside of the tube body 1, a button 7 is arranged on one end of the protective shell 6, a fixed block 8 is fixedly installed on one end of the tube body 1, a mounting plate 9 is arranged on the bottom of the fixed block 8, an electric push rod 10 is fixedly installed on the top of the mounting plate 9, a round convex 11 is fixedly installed on the top of the electric push rod 10, mounting grooves are provided at the four corners of the fixing block 8, and a moving opening is provided at the bottom of the mounting groove. A moving block 12 is movably connected inside the groove, a first magnetic block 13 is fixedly installed on one side of the moving block 12, and a connecting spring 14 is fixedly installed on the other side, one end of the connecting spring 14 is fixedly installed on the inner wall of the mounting groove, a second magnetic block 15 is fixedly installed on the inner wall of the protective block, the first magnetic block 13 is magnetically connected to the second magnetic block 15, a connecting ring 16 is fixedly installed at the bottom of the protective shell 6 and at the top of the tube body 1, a first support rod 17 is fixedly installed at the bottom of the connecting ring 16, a second support rod 21 is arranged inside one end of the first support rod 17, a moving structure is arranged on the top of the connecting ring 16, and the moving structure is symmetrically arranged around the center of the tube body 1.

[0028] The length of the tube body 1 is adjusted according to the length of the container, and the button 7 is pressed to start the electric push rod 10, and the electric push rod 10 is installed through the mounting plate 9. The electric push rod 10 drives the round protrusion 11 to move downward, and the moving block 12 is no longer squeezed by the round protrusion 11. At the same time, under the action of the connecting spring 14, the moving block 12 and the first magnetic block 13 are driven to move to the inside of the mounting groove, so that the first magnetic block 13 is separated from the second magnetic block 15, and then the protective shell 6 is moved upward. The protective shell 6 moves upward with the moving rod 2, so that the telescopic tube is extended. After moving to a suitable position, the button 7 is pressed again to make the electric push rod 10 drive the round protrusion 11 to move upward, so that the round protrusion 11 moves to the inside of the mounting groove through the moving opening, and moves along the inclined surface of the moving block 12, squeezing the moving block 12, so that the moving block 12 drives the first magnetic block 13 to move to the outside of the mounting groove, and at the same time, the connecting spring 14 is stretched, so that the first magnetic block 13 is magnetically connected with the second magnetic block 15, and the protective shell 6 is moved upward. The position of the shell 6 is fixed. When the position adjustment of the protective shell 6 is completed, the sampling head 5 is placed inside the container, and the bottom of the container is supported and fixed by the first support rod 17 and the second support rod 21, so that the sampling head 5 maintains a certain distance from the bottom of the container to prevent the sampling head 5 from contacting the bottom of the container, affecting the smooth entry of the liquid into the tube, and contaminating the sample inside the container. When the sampling is completed, the button 7 is pressed to make the electric push rod 10 drive the round protrusion 11 to move downward again, and the moving block 12 drives the first magnetic block 13 to move to the inside of the mounting groove through the action of the connecting spring 14, separates from the first magnetic block 13, and then moves the protective shell 6 downward. At the same time, the second support rod 21 is moved to the inside of the first support rod 17 through the action of the moving structure, and the protective shell 6 is continued to be moved downward so that the sampling head 5 and the first support rod 17 are moved to the inside of the protective shell 6 to protect it, so as to prevent the sampling head 5 from being damaged and affecting its use.

[0029] like Figure 1 to Figure 2 As shown, the button 7 is electrically connected to the electric push rod 10, the moving rod 2 is located at the top of the protective shell 6, a round hole is provided at the bottom of the protective shell 6, the first support rod 17 is located on both sides of the sampling head 5, a slide groove is provided on one side of the protective shell 6, and an adjustment structure 18 is provided inside the slide groove and on one side of the protective shell 6.

[0030] The button 7 can be used to control the electric push rod 10 to drive the movement of the round protrusion 11, so that the moving block 12 inside the fixed block 8 and the first magnetic block 13 can move. Through the magnetic connection with the first magnetic block 13, it is convenient to fix the position of the protective shell 6 after moving, and it is convenient to adjust the length of the tube body 1. Through the circular hole at the bottom of the protective shell 6, it is convenient to move the connecting ring 16, the first support rod 17, and the sampling head 5 to the inside of the protective shell 6 for protection. The first support rod 17 facilitates the movement of the second support rod 21, so that the second support rod 21 can support and fix the sampling head 5. The slide groove on one side of the protective shell 6 facilitates the movement of the adjustment structure 18. When the adjustment structure 18 moves to the top of the slide groove, it is convenient to support and fix the sampling tube body 1 to prevent shaking during sampling. When the sampling head 5 and the first support rod 17 move to the inside of the protective shell 6, the adjustment structure 18 moves to the bottom of the slide groove. The adjustment structure 18 shields and protects the bottom of the protective shell 6, further improving the use of the protective shell 6 and reducing damage to the sampling head 5.

[0031] like Figures 3 to 7 As shown, the mounting plate 9 is fixedly installed on the tube body 1, the round protrusion 11 is arranged corresponding to the moving port, the moving block 12 is L-shaped, and the side of the moving block 12 close to the moving port is an inclined surface. The electric push rod 10 and the round protrusion 11 extend through the moving port to the inclined surface of the moving block 12, and the number of the first magnetic blocks 13 is the same as the number of the second magnetic blocks 15, and they are arranged corresponding to the moving block 12.

[0032] The mounting plate 9 is convenient for fixing the electric push rod 10. Starting the electric push rod 10 drives the round protrusion 11 to move through the moving opening, so that the round protrusion 11 can move into the mounting groove, and the moving block 12 is squeezed, so that the moving block 12 drives the first magnetic block 13 to move to the outside of the mounting groove and connect with the second magnetic block 15, and the position of the protective shell 6 is fixed. The L-shaped moving block 12 is convenient for connecting the connecting spring 14 to the mounting groove. When the moving block 12 moves to the inside of the mounting groove, the connecting spring 14 is stretched. When the electric push rod 10 drives the round protrusion 11 to move downward through the moving opening, the moving block 12 is no longer squeezed. Through the action of the connecting spring 14, it is convenient to return to the inside of the mounting groove, so that the first magnetic block 13 and the second magnetic block 15 are no longer connected, so that the position of the protective shell 6 can be moved.

[0033] like Figures 4 to 8As shown, movable openings are provided at both ends of the top of the connecting ring 16, and the movable openings pass through the middle of the first support rod 17. A movable plate 19 is movably connected inside the first support rod 17. A compression spring 20 is fixedly installed at the bottom of the movable plate 19, and the bottom of the compression spring 20 is fixedly installed with the second support rod 21. The movable structure includes a first rack 22, one side of the first rack 22 is fixedly installed with the inner wall of the protective shell 6, a gear 23 is provided on one side of the first rack 22, a rotating rod 24 is fixedly installed in the middle of the gear 23, and mounting rings 25 are provided at both ends of the rotating rod 24. The inner wall of the mounting ring 25 is fixedly installed with the tube body 1, and mounting openings are provided at both ends of the mounting ring 25. Both ends of the rotating rod 24 are rotatably connected with the mounting openings, a second rack 26 is meshed with one side of the gear 23, and a push rod 27 is fixedly installed at the bottom of the second rack 26.

[0034] When the first support rod 17 and the sampling head 5 are located inside the protective shell 6, the first rack 22 and the gear 23 are in meshing state, the second rack 26 is located above the first rack 22, and the push rod 27 is located at the top of the connecting ring 16. When the sampling head 5 needs to be exposed for sampling, the protective shell 6 is moved upward, so that the sampling head 5 and the first support rod 17 are moved to the outside of the protective shell 6 through the circular hole. When the protective shell 6 moves upward, the first rack 22 is driven to move upward, so that the gear 23 drives the rotating rod 24 to rotate, and the rotating rod 24 rotates along the inner walls of the mounting opening on both sides of the mounting ring 25, driving the second rack 26 to move downward, and the second rack 26 drives the push rod 27 to move downward through the movable opening at the top of the connecting ring 16. The push rod 27 moves to the inside of the first support rod 17 and pushes the movable plate 19 to drive the compression spring 20 to compress, so that the second support rod 21 moves to the bottom of the first support rod 17 to support the sampling head 5, so that the sampling head 5 will not touch the bottom of the container when sampling, thereby facilitating sampling.

[0035] like Figures 3 to 5 As shown, the first rack 22 is located above the second rack 26, the first rack 22 and the second magnetic block 15 are cross-symmetrically arranged, one end of the second rack 26 is located at the installation opening, the second rack 26 is slidably connected to the outer side of the tube body 1 away from the gear 23, the gear 23 and the second rack 26 are located at the top of the circular hole, one end of the push rod 27 extends through the movable opening to the top of the movable plate 19, the compression spring 20 is in a compressed state, the second support rod 21 extends through the movable opening to the bottom of the first support rod 17, and the bottom end of the second support rod 21 is located below the sampling head 5.

[0036] When the second support rod 21 moves to the bottom of the sampling head 5, the pushing rod 27 pushes the moving plate 19 to move downward along the inner wall 17 of the first support rod, so that the compression spring 20 is in a compressed state and can push the second support rod 21 to move downward. When the protective shell 6 continues to be moved to adjust the length of the tube body 1, the first rack 22 is separated from the gear 23, and the first rack 22 moves to the top of the second rack 26, so that the position of the second support rod 21 is fixed. The circular hole facilitates the gear 23 and the second rack 26 to move out of the protective shell 6, so that the protective shell 6 can continue to move upward, thereby facilitating adjustment according to the length of the container and improving applicability.

[0037] like Fig. 9 As shown, the adjustment structure 18 includes a slider 181, a strip-shaped opening is opened in the middle of the slider 181, a movable rod 182 is rotatably connected to the inner wall of the strip-shaped opening, a connecting block 183 is fixedly installed in the middle of the movable rod 182, a groove is opened inside the connecting block 183, a fixing spring 184 is fixedly installed on the inner wall of the groove, and a cover 185 is fixedly installed on one end of the fixing spring 184.

[0038] By moving the slider 181, the connecting block 183 and the cover 185 are driven to move, so that the cover 185 moves to the top of the container, and by pulling the cover 185, the fixed spring 184 is stretched, so that the cover 185 can be adjusted to containers of different radii, so that the cover 185 can be moved to the top of the container to support one side of the tube body 1. When the sampling is completed, the sampling head 5 and the first support rod 17 are moved to the inside of the protective shell 6, and the slider 181 is moved downward to move the connecting block 183 and the cover 185 to the bottom of the slide groove, and then the connecting block 183 is rotated to rotate the cover 185 to a horizontal state with the protective shell 6, and located at the bottom of the protective shell 6, the circular hole at the bottom thereof is blocked, and the protective effect is further improved.

[0039] like Figure 1 , Figure 2 , Fig. 9 As shown, limiting grooves are provided on both sides of the slide groove, limiting blocks 29 are fixedly installed on both sides of the slider 181, the limiting blocks 29 are slidably connected to the limiting grooves, and a clamping block 28 is fixedly installed at one end of the bottom of the cover 185.

[0040] When the slider 181 moves, it drives the limiting block 29 to move along the limiting groove, preventing the slider 181 from moving into the sliding groove, making it inconvenient to support the tube body 1 through the cover 185 and protect the protective shell 6. When the cover 185 is rotated to a horizontal state with the container, the cover 185 moves to the top of the container, and the cover 185 is limited by the block 28, so that the cover 185 can be stuck on the top of the container to support the tube body 1. When the cover 185 is located at the bottom of the protective shell 6, the block 28 can be used to improve the stability of the shielding protection of the bottom of the protective shell 6.

[0041] Working principle: When in use, the sampling head 5 and the first support rod 17 are located inside the protective shell 6. The cover 185 is rotated first, so that the connecting block 183 drives the movable rod 182 to rotate along the strip-shaped opening in the middle of the slider 181, so that the cover 185 is rotated to one side of the protective shell 6 to expose the round hole. The button 7 is pressed, so that the electric push rod 10 drives the round protrusion 11 to move to the bottom of the fixed block 8 through the moving opening. The moving block 12 is no longer squeezed, and the connecting spring 14 drives the moving block 12 and the first magnetic block 13 to move to the installation groove. The first rack 22 is moved upwards, and the first support rod 17 and the connecting ring 16 are no longer connected to the inside of the tube body 1, and the protective shell 6 is moved upwards, so that the sampling head 5, the first support rod 17 and the connecting ring 16 are moved to one side of the protective shell 6, so that the connecting ring 16 is located at the circular hole. When the protective shell 6 moves, the first rack 22 is driven to move upwards at the same time, so that the gear 23 drives the rotating rod 24 and the second rack 26 to move downwards along the outer side of the tube body 1. When the first rack 22 moves upwards and separates from the gear 23, the second rack 26 drives the push rod 27 to pass through the movable opening at the top of the connecting ring 16 and extend to the second rack 26. The first support rod 17 is moved inside, and the moving plate 19 is squeezed, so that the compression spring 20 compresses and pushes the second support rod 21 to move to the bottom of the first support rod 17, and is located below the sampling head 5. According to the length of the container, the protective shell 6 is continued to be moved upward. When it moves to the appropriate position, the button 7 is pressed, and the electric push rod 10 drives the round protrusion 11 to move upward to the inside of the mounting groove, squeezes the moving block 12, so that the connecting spring 14 is stretched, and the moving block 12 drives the first magnetic block 13 and the second magnetic block 15 to be magnetically connected, and the position of the protective shell 6 is fixed. The slider 181 is moved upward, so that the limiting block 29 moves upward along the limiting groove, so that the cover 185 moves to the top of the container, and the tube body 1 is placed in the container so that the second support rod 21 contacts the bottom of the container, and then the slider 181 is moved downward so that the cover 185 is located at the top of the container, and the cover 185 is pulled to stretch the connecting spring 14, and the block 28 is clamped on one side of the container to support the tube body 1, and then the moving rod 2 is moved upward to drive the telescopic tube and the piston 4 to move, so that the sampling head 5 can be sampled.

[0042] When sampling is completed, the button 7 is pressed to move downward through the electric push rod and the round protrusion 11, and the connecting spring 14 contracts. The moving block 12 drives the first magnetic block 13 to separate from the second magnetic block 15, and moves the protective shell 6 downward, so that the first rack 22 moves downward. When the first rack 22 is engaged with the gear 23, the gear 23 and the rotating rod 24 are driven to rotate, so that the second rack 26 drives the push rod 27 to move upward, and the moving plate 19 is no longer squeezed. The compression spring 20 stretches and drives the second support rod 21 to move toward the inside of the first support rod 17. When the second rack 26 drives the push rod 27 to move to the top of the connecting ring 16, the moving plate 19 moves to the top inside the first support rod 17, and the compression spring 20 It is in a stretched state, and the second support rod 21 moves to the inside of the first support rod 17, and then the protective shell 6 is continued to be moved downward, so that the first support rod 17 and the sampling head 5 are completely moved to the inside of the protective shell 6, and then the slider 181 is moved downward, so that the slider 181 drives the connecting block 183, the connecting spring 14 and the cover 185 to move to the bottom end of the slide groove, and the connecting block 183 is rotated to drive the movable rod 182 to rotate along the middle strip opening of the slider 181, so that the cover 185 is rotated to the bottom of the protective shell 6 and keeps it level with it, and then the block 29 is pulled to stretch the fixed spring 184, and the block 28 is located on one side of the protective shell 6 to limit the cover 185, so as to shield and protect the bottom of the protective shell 6.

[0043] The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them.

Claims

1. A food contaminant sampling device for MOF material experiments, comprising a tube body (1), characterized in that: The top of the tube body (1) is provided with a moving rod (2), the bottom of the moving rod (2) is fixedly mounted with a telescopic rod (3), the bottom of the telescopic rod (3) is fixedly mounted with a piston (4), the piston (4) is movably connected to the inner wall of the tube body (1), the bottom of the tube body (1) is fixedly mounted with a sampling head (5), the outer side of the tube body (1) is provided with a protective shell (6), one end of the protective shell (6) is provided with a button (7), one end of the tube body (1) is fixedly mounted with a fixed block (8), the bottom of the fixed block (8) is provided with a mounting plate (9), the top of the mounting plate (9) is fixedly mounted with an electric push rod (10), the top of the electric push rod (10) is fixedly mounted with a round convex (11), the four corners of the fixed block (8) are provided with mounting grooves, and the bottom of the mounting groove is provided with a moving A movable block (12) is movably connected inside the installation groove, a first magnetic block (13) is fixedly installed on one side of the movable block (12), and a connecting spring (14) is fixedly installed on the other side, one end of the connecting spring (14) is fixedly installed on the inner wall of the installation groove, a second magnetic block (15) is fixedly installed on the inner wall of the protective block, the first magnetic block (13) and the second magnetic block (15) are magnetically connected, a connecting ring (16) is fixedly installed at the bottom of the protective shell (6) and located at the top of the tube body (1), a first support rod (17) is fixedly installed at the bottom of the connecting ring (16), a second support rod (21) is arranged inside one end of the first support rod (17), and a movable structure is arranged on the top of the connecting ring (16), and the movable structure is arranged symmetrically with respect to the center of the tube body (1).

2. A food contaminant sampling device for MOF material experiments according to claim 1, characterized in that: The button (7) is electrically connected to the electric push rod (10), the moving rod (2) is located at the top of the protective shell (6), a round hole is provided at the bottom of the protective shell (6), the first support rod (17) is located at both sides of the sampling head (5), a slide groove is provided on one side of the protective shell (6), and an adjustment structure (18) is provided inside the slide groove and on one side of the protective shell (6).

3. The food contaminant sampling device for MOF material experiments according to claim 1, characterized in that: The mounting plate (9) is fixedly mounted on the tube body (1); the circular protrusion (11) is arranged corresponding to the moving opening; the moving block (12) is L-shaped; the side of the moving block (12) close to the moving opening is an inclined surface; the electric push rod (10) and the circular protrusion (11) pass through the moving opening and extend to the inclined surface of the moving block (12); the number of the first magnetic blocks (13) is the same as the number of the second magnetic blocks (15), and they are arranged corresponding to the moving block (12).

4. The food contaminant sampling device for MOF material experiments according to claim 1, characterized in that: Both ends of the top of the connecting ring (16) are provided with movable openings, and the movable openings penetrate the middle of the first support rod (17). A movable plate (19) is movably connected inside the first support rod (17), a compression spring (20) is fixedly installed at the bottom of the movable plate (19), and a second support rod (21) is fixedly installed at the bottom of the compression spring (20).

5. The food contaminant sampling device for MOF material experiments according to claim 1, characterized in that: The moving structure comprises a first rack (22), one side of the first rack (22) is fixedly mounted on the inner wall of the protective shell (6), a gear (23) is arranged on one side of the first rack (22), a rotating rod (24) is fixedly mounted in the middle of the gear (23), both ends of the rotating rod (24) are provided with mounting rings (25), the inner wall of the mounting ring (25) is fixedly mounted on the tube body (1), both ends of the mounting ring (25) are provided with mounting openings, both ends of the rotating rod (24) are rotatably connected to the mounting openings, a second rack (26) is meshed on one side of the gear (23), and a push rod (27) is fixedly mounted at the bottom of the second rack (26).

6. A food contaminant sampling device for MOF material experiments according to claim 5, characterized in that: The first rack (22) is located above the second rack (26); the first rack (22) and the second magnetic block (15) are arranged in a cross-symmetric manner; one end of the second rack (26) is located at the installation opening; the side of the second rack (26) away from the gear (23) is slidably connected to the outer side of the tube body (1); and the gear (23) and the second rack (26) are located at the top of the circular hole.

7. A food contaminant sampling device for MOF material experiments according to claim 5, characterized in that: One end of the push rod (27) passes through the movable opening and extends to the top of the movable plate (19), the compression spring (20) is in a compressed state, the second support rod (21) passes through the movable opening and extends to the bottom of the first support rod (17), and the bottom end of the second support rod (21) is located below the sampling head (5).

8. A food contaminant sampling device for MOF material experiments according to claim 2, characterized in that: The adjustment structure (18) comprises a slider (181), a strip-shaped opening is provided in the middle of the slider (181), a movable rod (182) is rotatably connected to the inner wall of the strip-shaped opening, a connecting block (183) is fixedly installed in the middle of the movable rod (182), a groove is provided inside the connecting block (183), a fixing spring (184) is fixedly installed on the inner wall of the groove, and a sealing cover (185) is fixedly installed on one end of the fixing spring (184).

9. A food contaminant sampling device for MOF material experiments according to claim 8, characterized in that: Limiting grooves are provided on both sides of the slide groove, limiting blocks (29) are fixedly installed on both sides of the slider (181), the limiting blocks (29) are slidably connected to the limiting grooves, and a clamping block (28) is fixedly installed at one end of the bottom of the cover (185).

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