Sample pretreatment device

Abstract

The utility model relates to sample detection technical field provides a kind of sample pretreatment device, comprising: rack, pulverization jar, pulverization subassembly and rotating component;Pulverization jar is rotatably arranged in rack, pulverization jar has pulverization cavity and with the feed inlet and discharge port of pulverization cavity communication, feed inlet and discharge port are all located in the top end of pulverization jar;Pulverization subassembly is arranged in pulverization jar, at least part pulverization subassembly is liftable and is arranged in pulverization cavity, to carry out pulverization treatment to sample in pulverization cavity;Rotating component is arranged in rack, rotating component and pulverization jar are connected, to drive pulverization jar overturn relative to rack.The sample pretreatment device shown in the utility model ensures the pulverization effect of sample, avoids the problem that sample pulverization treatment appears leakage, and can automatically discharge sample after pulverization treatment, solves the poor pulverization effect of existing pulverizer to sample, and there is the problem that discharge design is not reasonable.

Description

Technical Field

[0001] This utility model relates to the field of sample testing technology, and in particular to a sample pretreatment device. Background Technology

[0002] Currently, before testing food samples, it is usually necessary to use a grinder to pulverize the samples into relatively uniform small particles to facilitate subsequent testing and analysis. However, in practical applications, it has been found that existing grinders have poor sample pulverization effects, and their discharge design is unreasonable, making automatic discharge difficult and prone to leakage during operation. Utility Model Content

[0003] This utility model provides a sample pretreatment device to at least solve or improve the problems of poor sample crushing effect and unreasonable discharge design of existing crushers.

[0004] This utility model provides a sample pretreatment device, comprising: frame; A pulverizing tank is rotatably mounted on the frame. The pulverizing tank has a pulverizing chamber and an inlet and an outlet communicating with the pulverizing chamber. Both the inlet and the outlet are located at the top of the pulverizing tank. A pulverizing assembly is disposed in the pulverizing tank, and at least a portion of the pulverizing assembly is vertically and vertically disposed within the pulverizing chamber to pulverize the sample within the pulverizing chamber; A rotating assembly is disposed on the frame and connected to the grinding tank to drive the grinding tank to rotate relative to the frame.

[0005] According to the sample pretreatment device provided by this utility model, the pulverizing component includes: A driving component is disposed at the top of the pulverizing tank. The driving component includes a lifting part and a rotating part, which are connected to drive the rotating part to move up and down. A blade holder is disposed in the grinding chamber, the top end of the blade holder passing through an opening located at the top of the grinding tank and connected to the rotating part.

[0006] According to the sample pretreatment device provided by this utility model, the driving component further includes a housing, and the lifting part and the rotating part are disposed inside the housing; The lifting part includes a drive motor, a lead screw, and a lifting frame. The drive motor and the lead screw are connected by a transmission to drive the lead screw to rotate. The lead screw is rotatably disposed in the housing in the vertical direction. The lifting frame is movably disposed in the housing in the vertical direction. The rotating part is disposed in the lifting frame. The lifting frame has a threaded hole, and the lead screw is threadedly engaged with the threaded hole.

[0007] According to the sample pretreatment device provided by this utility model, the lead screw has two screws, the lifting frame has two threaded holes, the two lead screws are connected to the two threaded holes one-to-one, and the rotating part is located between the two lead screws. The lifting mechanism includes two sets of bevel gears. Each set of bevel gears includes a first bevel gear and a second bevel gear that mesh with each other. The drive motor is coaxially connected to the first bevel gears of the two sets of bevel gears via connecting rods. The second bevel gears of the two sets of bevel gears are connected to the two lead screws one-to-one.

[0008] According to the present invention, a sample pretreatment device is provided, wherein the lifting frame has a groove, and two connecting parts are formed on both sides of the groove, and the rotating part is disposed in the groove; Each of the connecting parts is provided with a threaded hole, and the two lead screws are threadedly connected to the corresponding threaded holes of the two connecting parts in a one-to-one correspondence.

[0009] According to the present invention, a sample pretreatment device is provided, wherein the knife holder includes a vertical bar and at least one horizontal bar; The upper end of the vertical rod passes through the opening and is connected to the rotating part, and the horizontal rod is perpendicularly connected to the vertical rod.

[0010] According to the sample pretreatment device provided by this utility model, the rotating assembly includes: Telescopic components are installed on the frame; A power conversion component includes a first part and a second part, wherein the first part is connected to the telescopic component, and the second part is connected to the first part in a transmission manner; A rotating shaft is rotatably mounted on the frame, the second part is connected to the rotating shaft, and the rotating shaft is connected to the side wall of the crushing tank; The first part and the second part cooperate to convert the telescopic movement of the telescopic member into a rotational movement that drives the rotating shaft to rotate.

[0011] According to the present invention, a sample pretreatment device is provided, wherein the first part includes a transmission rod, and the second part includes a meshing first gear and a second gear; The first end of the transmission rod is rotatably connected to the telescopic end of the telescopic component, the second end of the transmission rod is rotatably connected to the eccentric position on the first gear, and the second gear and the rotating shaft are coaxially connected.

[0012] According to the sample pretreatment device provided by this utility model, the rotating assembly further includes: A protective cover is connected to the frame, and the power conversion component and at least a portion of the telescopic component are disposed within the protective cover.

[0013] According to the present invention, a sample pretreatment device is provided, the frame comprising: A base, wherein the bottom of the base is provided with support legs; A first arm and a second arm are spaced apart from each other and arranged side by side on the base, and the pulverizing tank is rotatably disposed between the first arm and the second arm.

[0014] The sample pretreatment device provided by this utility model features a tiltable pulverizing tank based on a frame, with a portion of the pulverizing components vertically mounted within the pulverizing chamber. When the sample is fed into the pulverizing chamber through the inlet, the lifting motion of the pulverizing components allows for pulverization of samples at different heights within the chamber, ensuring effective pulverization. Furthermore, by placing the outlet at the top of the pulverizing tank, the integrity of the tank structure is maintained, preventing leakage during sample pulverization and ensuring the durability, hygiene, and safety of the entire device. After pulverization, a rotating component drives the pulverizing tank to tilt relative to the frame, automatically discharging the pulverized sample from the outlet. The operation is simple and convenient. This design effectively solves the problems of poor sample pulverization effect and unreasonable discharge design in existing pulverizers. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the sample pretreatment device provided by this utility model.

[0017] Figure 2 This is a side view of the sample pretreatment device provided by this utility model.

[0018] Figure 3 This is a schematic diagram of the installation structure of the crushing component and crushing tank provided by this utility model.

[0019] Figure 4This is a schematic diagram of the structure of the crushing component provided by this utility model.

[0020] Figure 5 This is a schematic diagram of the installation structure of the rotating component provided by this utility model on the frame.

[0021] Figure label: 1. Frame; 11. Base; 12. First arm; 13. Second arm; 2. Grinding tank; 21. Tank body; 22. Cover; 201. Grinding chamber; 202. Feed inlet; 203. Discharge outlet; 211. Support ring; 3. Crushing assembly; 31. Drive unit; 311. Lifting part; 3111. Drive motor; 3112. Lead screw; 3113. Lifting frame; 3101. Groove; 3114. Bevel gear set; 312. Rotating part; 32. Blade holder; 321. Vertical rod; 322. Horizontal rod; 313. Outer shell; 4. Rotating assembly; 41. Telescopic component; 42. Power conversion component; 421. First part; 422. Second part; 43. Rotating shaft; 44. Protective cover; 5. Tray; 6. Cup. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] The following is combined Figures 1-5 The sample pretreatment device provided by the utility model embodiment will be described in detail through specific embodiments and application scenarios.

[0024] like Figure 1 , Figure 2 and Figure 5 As shown, this utility model embodiment provides a sample pretreatment device, including: a frame 1, a pulverizing tank 2, a pulverizing component 3, and a rotating component 4; The pulverizing tank 2 is rotatably mounted on the frame 1. The pulverizing tank 2 has a pulverizing chamber 201 and an inlet 202 and an outlet 203 communicating with the pulverizing chamber 201. The inlet 202 and the outlet 203 are both located at the top of the pulverizing tank 2. The pulverizing component 3 is mounted on the pulverizing tank 2. At least part of the pulverizing component 3 is vertically and vertically mounted in the pulverizing chamber 201 to pulverize the sample in the pulverizing chamber 201. The rotating component 4 is mounted on the frame 1 and connected to the pulverizing tank 2 to drive the pulverizing tank 2 to rotate relative to the frame 1.

[0025] It is understandable that food samples enter the crushing chamber 201 through the feed inlet 202 and are crushed by the crushing component 3 in the crushing chamber 201. This design can finely crush the sample while avoiding splashing during the crushing process.

[0026] Meanwhile, by placing the feed inlet 202 at the top of the grinding tank 2, the amount of material contained in the grinding tank 2 can be ensured. A flip-up cover can be installed at the feed inlet 202 to ensure that the feed inlet 202 is in a closed state after the sample is added, preventing the sample from splashing out through the feed inlet 202 during the grinding process. By placing the discharge outlet 203 at the top of the grinding tank 2, the integrity of the overall structure of the grinding tank 2 can be avoided by opening it at the bottom or side wall, and it also helps to prevent the sample from overflowing from the discharge outlet 203 during the grinding process.

[0027] During the sample pulverization process, the lifting and lowering of the pulverizing component 3 within the pulverizing chamber 201 can be controlled to pulverize samples at different heights, ensuring pulverization effectiveness and avoiding the uneven pulverization problem inherent in traditional fixed-height blade pulverization. In practical applications, the portion of the pulverizing component 3 within the pulverizing chamber 201 can employ a stirring element or an ultrasonic pulverizer. The stirring element utilizes the shearing force during rotation to pulverize the sample, while the ultrasonic pulverizer utilizes generated ultrasonic waves to pulverize the sample (e.g., a liquid sample).

[0028] After the sample pulverization process is completed, the rotating component 4 can be used to drive the pulverizing tank 2 to rotate relative to the frame 1 by a preset angle, for example, a preset angle of 60° to 180°, or optionally, a preset angle of 90° to 150°, to ensure that the pulverized sample in the pulverizing tank 2 is discharged from the discharge port 203 into the holding cup 6; wherein... Figure 2 The illustration shows the holding cup 6 placed on a tray 5 located on one side of the frame 1, and the discharge port 203 on the crushing tank 2 located at the edge of the crushing tank 2 and configured in a bucket shape to facilitate discharge.

[0029] The sample pretreatment device of this utility model features a rotatable pulverizing tank 2 mounted on a frame 1. A portion of the pulverizing components 3 are vertically and flexibly positioned within the pulverizing chamber 201 of the pulverizing tank 2. When a sample is fed into the pulverizing chamber 201 through the inlet 202, the pulverizing components 3 can be used to pulverize samples at different heights within the pulverizing chamber 201, ensuring effective pulverization. Furthermore, by positioning the outlet 203 at the top of the pulverizing tank 2, the integrity of the tank 2 structure is maintained, preventing leakage during sample pulverization and ensuring the durability, hygiene, and safety of the entire device. After sample pulverization, the pulverizing tank 2 is automatically discharged from the outlet 203 by rotating the component 4 to rotate it relative to the frame 1. The operation is simple and convenient. This design effectively solves the problems of poor sample pulverization effect and unreasonable discharge design in existing pulverizers.

[0030] In some embodiments, such as Figure 3 and Figure 4 As shown, the crushing assembly 3 includes a drive member 31 and a blade holder 32. The drive member 31 is disposed at the top of the crushing tank 2. The drive member 31 includes a lifting part 311 and a rotating part 312. The lifting part 311 and the rotating part 312 are connected to drive the rotating part 312 to rise and fall. The blade holder 32 is disposed in the crushing chamber 201. The top of the blade holder 32 passes through the opening located at the top of the crushing tank 2 and is connected to the rotating part 312.

[0031] It is understandable that the drive unit 31 is located outside the crushing tank 2, while only the blade holder 32 is located inside the crushing tank 2. The area where the top of the blade holder 32 and the opening of the crushing tank 2 meet can adopt a sliding seal design to prevent the sample from being accidentally contaminated during the crushing process.

[0032] The lifting part 311 of the drive component 31 can be a linear motor or a lead screw 3112 lifting mechanism, without specific limitation. The rotating part 312 of the drive component 31 is used to drive the blade holder 32 to rotate in the crushing chamber 201, so as to use the shearing force generated when the blade holder 32 rotates to crush the sample. The rotating part 312 can be a servo motor to facilitate the control of the rotation angle and speed of the blade holder 32.

[0033] In some embodiments, such as Figure 4 As shown, the drive unit 31 also includes a housing 313, and the lifting part 311 and the rotating part 312 are disposed inside the housing 313. The housing 313 can be used to provide physical protection for the lifting part 311 and the rotating part 312. The lifting part 311 includes a drive motor 3111, a lead screw 3112, and a lifting frame 3113. The drive motor 3111 and the lead screw 3112 are connected by a transmission to drive the lead screw 3112 to rotate. The lead screw 3112 is rotatably disposed in the housing 313 in the vertical direction. The lifting frame 3113 is movablely disposed in the housing 313 in the vertical direction. The rotating part 312 is disposed in the lifting frame 3113. The lifting frame 3113 has a threaded hole, and the lead screw 3112 is threadedly engaged with the threaded hole.

[0034] It is understandable that the lifting frame 3113 serves as the carrier for mounting the rotating part 312, and is used to drive the rotating part 312 to move up and down, thereby driving the blade holder 32 to move up and down, so as to adjust the arrangement height of the blade holder 32 relative to the crushing chamber 201.

[0035] Meanwhile, a vertical guide structure is provided between the lifting frame 3113 and the outer shell 313. For example, the vertical guide structure includes a slide groove and a slide rail. The slide rail is slidably disposed in the slide groove and is disposed on one side of the lifting frame 3113 facing the outer shell 313. The slide groove is disposed on the inner wall surface of the outer shell 313.

[0036] In practical applications, the drive motor 3111 is fixedly connected to the housing 313 and drives the lead screw 3112 to rotate relative to the housing 313. Based on the threaded engagement between the lead screw 3112 and the threaded hole of the lifting frame 3113, the lead screw can drive the lifting frame 3113 to move up and down relative to the housing 313.

[0037] In some embodiments, such as Figure 4 As shown, in order to more stably control the lifting frame 3113 to move up and down relative to the outer shell 313, there are two lead screws 3112, the lifting frame 3113 has two threaded holes, the two lead screws 3112 are connected to the two threaded holes one by one, and the rotating part 312 is located between the two lead screws 3112. The lifting mechanism 311 includes two sets of bevel gear sets 3114. Each set of bevel gear sets 3114 includes a first bevel gear and a second bevel gear that mesh with each other. The drive motor 3111 is coaxially connected to the corresponding first bevel gears of the two sets of bevel gear sets 3114 via connecting rods. The corresponding second bevel gears of the two sets of bevel gear sets 3114 are respectively connected to two lead screws 3112. The connecting rods are horizontally arranged.

[0038] In some embodiments, such as Figure 4As shown, in order to ensure the compactness of the design structure of the entire drive component 31, the lifting frame 3113 has a groove 3101, and two connecting parts are formed on both sides of the groove 3101, and the rotating part 312 is disposed in the groove 3101; each connecting part is provided with a threaded hole, and the two lead screws 3112 are threadedly connected to the corresponding threaded holes of the two connecting parts one by one.

[0039] In some embodiments, such as Figure 3 and Figure 4 As shown, the tool holder 32 includes a vertical rod 321 and at least one horizontal rod 322; the upper end of the vertical rod 321 passes through the opening and is connected to the rotating part 312, and the horizontal rod 322 is vertically connected to the vertical rod 321.

[0040] It is understood that the vertical rod 321 can be arranged along the central axis of the crushing tank 2 in the crushing chamber 201 of the crushing tank 2, and at least one horizontal rod 322 is arranged in the area near the lower end of the vertical rod 321, and each horizontal rod 322 is arranged symmetrically with respect to the vertical rod 321.

[0041] For example, the crossbar 322 is provided by at least two crossbars 322, which are arranged at intervals along the height direction of the vertical bar 321.

[0042] In some embodiments, such as Figure 1 and Figure 3 As shown, the crushing tank 2 includes a tank body 21 and a cover 22. The tank body 21 is open at the top, and the cover 22 is detachably disposed at the open end of the tank body 21. For example, the cover 22 is threadedly connected to the open end of the tank body 21. The tank body 21 and the cover 22 form a crushing chamber 201. The cover 22 is provided with a feed inlet 202, a discharge outlet 203 and a drive component 31 for the crushing assembly 3, and the cover 22 is provided with a through hole that is adapted to the top of the blade holder 32.

[0043] In some embodiments, such as Figure 1 and Figure 5 As shown, the rotating assembly 4 includes: a telescopic component 41, a power conversion component 42, and a rotating shaft 43; The telescopic component 41 is mounted on the frame 1. The power conversion component 42 includes a first part 421 and a second part 422. The first part 421 is connected to the telescopic component 41, and the second part 422 is connected to the first part 421 in a transmission manner. The rotating shaft 43 is rotatably mounted on the frame 1. The second part 422 is connected to the rotating shaft 43, and the rotating shaft 43 is connected to the side wall of the crushing tank 2. The first part 421 and the second part 422 cooperate to convert the telescopic movement of the telescopic member 41 into the rotational movement that drives the rotating shaft 43 to rotate.

[0044] It is understood that the telescopic component 41 can be a hydraulic cylinder or an electric push rod, and there is no specific limitation on this. The side wall of the crushing tank 2 is fitted with a support ring 211. The mechanical strength of the support ring 211 is greater than that of the crushing tank 2. The support ring 211 and the crushing tank 2 can be fastened together by bolts. The rotating shaft 43 is configured to be connected to the support ring 211 (e.g., by welding).

[0045] To ensure the stability of the grinding tank 2 relative to the frame 1, a first-side connection can be made between the rotating shaft 43 and the support ring 211, and a support shaft can be provided on the second side of the support ring 211. The support shaft is rotatably connected to the frame 1. This design can provide support for the grinding tank 2 on both sides by the rotating shaft 43 and the support shaft; wherein the rotating shaft 43 and the support shaft are coaxially arranged.

[0046] In practical applications, the telescopic member 41 drives the first part 421 to move along the first direction. The first part 421 and the second part 422 cooperate with each other, and the second part 422 drives the rotating shaft 43 to rotate in the clockwise direction, ensuring that the rotating shaft 43 drives the crushing tank 2 to flip towards the holding cup 6 so that the sample in the crushing tank 2 can be discharged into the holding cup 6 through the discharge port 203. After the sample is discharged, the telescopic member 41 can drive the first part 421 to move along the second direction opposite to the first direction, so that the second part 422 drives the rotating shaft 43 to rotate in the counterclockwise direction, and then the rotating shaft 43 returns to the vertical state.

[0047] In some examples, the first part 421 of the power conversion component 42 can be a connecting rod, and the second part 422 of the power conversion component 42 can be a crank. The telescopic end of the telescopic component 41 is rotatably connected to the first end of the connecting rod, and the second end of the connecting rod is rotatably connected to the end of the crank. The first end of the crank is sleeved on the rotating shaft 43. When the telescopic component 41 drives the connecting rod to move in a straight line, based on the transmission cooperation between the connecting rod and the crank, the crank can drive the rotating shaft 43 to rotate within a certain angle range.

[0048] In some examples, the first part 421 of the power conversion component 42 can be a hinged rod, and the second part 422 of the power conversion component 42 can be a rotating wheel. The telescopic end of the telescopic component 41 is rotatably connected to the first end of the hinged rod, and the second end of the hinged rod is rotatably connected to an eccentric position on the rotating wheel. The rotating wheel is sleeved on the rotating shaft 43. When the telescopic component 41 drives the hinged rod to move in a straight line, based on the transmission cooperation between the hinged rod and the rotating wheel, the rotating wheel can drive the rotating shaft 43 to rotate within a certain angle range.

[0049] In some examples, such as Figure 5As shown, the power conversion component 42 can also be configured with a first part 421 including a transmission rod, and a second part 422 including a meshing first gear and a second gear; the first end of the transmission rod is rotatably connected to the telescopic end of the telescopic component 41, the second end of the transmission rod is rotatably connected to an eccentric position on the first gear, and the second gear and the rotating shaft 43 are coaxially connected. When the telescopic component 41 drives the transmission rod to move in a straight line, based on the transmission engagement between the transmission rod and the first gear, the first gear can drive the second gear to rotate, and then the second gear can drive the rotating shaft 43 to rotate within a certain angle range.

[0050] In order to facilitate the control of the crushing tank 2 to rotate at a relatively large angle, the gear ratio of the first gear and the second gear can be set to be greater than 1.

[0051] Meanwhile, in order to meet actual deployment requirements, a transition piece can also be provided between the telescopic component 41 and the transmission rod. For example, the telescopic end of the telescopic component 41 is connected to one end of the transition piece, and the other end of the transition piece is rotatably connected to the first end of the transmission rod.

[0052] In some embodiments, such as Figure 5 As shown, the rotating assembly 4 also includes a protective cover 44, which is connected to the frame 1. The power conversion component 42 and at least part of the telescopic component 41 are disposed inside the protective cover 44. This design can use the protective cover 44 to provide physical protection for the transmission structure between the power conversion component 42 and the telescopic component 41.

[0053] In some embodiments, such as Figure 1 As shown, the frame 1 includes: a base 11, a first support arm 12 and a second support arm 13; the bottom of the base 11 is provided with support feet, the first support arm 12 and the second support arm 13 are spaced apart from each other and arranged side by side on the base 11, and the crushing tank 2 is rotatably arranged between the first support arm 12 and the second support arm 13.

[0054] Understandably, the four corners of the base 11 can be provided with support feet to suspend the base 11, which helps to reduce the impact of moisture on the base 11 and the crushing tank 2.

[0055] Multiple crushing tanks 2 can be set up, and multiple crushing tanks 2 are arranged side by side on the frame 1. Each crushing tank 2 has a first support arm 12 and a second support arm 13 on its two sides.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A sample pretreatment device, characterized in that, include: frame; A pulverizing tank is rotatably mounted on the frame. The pulverizing tank has a pulverizing chamber and an inlet and an outlet communicating with the pulverizing chamber. Both the inlet and the outlet are located at the top of the pulverizing tank. A pulverizing assembly is disposed in the pulverizing tank, and at least a portion of the pulverizing assembly is vertically and vertically disposed within the pulverizing chamber to pulverize the sample within the pulverizing chamber; A rotating assembly is disposed on the frame and connected to the grinding tank to drive the grinding tank to rotate relative to the frame.

2. The sample pretreatment apparatus according to claim 1, characterized in that, The crushing component includes: A driving component is disposed at the top of the pulverizing tank. The driving component includes a lifting part and a rotating part, which are connected to drive the rotating part to move up and down. A blade holder is disposed in the grinding chamber, the top end of the blade holder passing through an opening located at the top of the grinding tank and connected to the rotating part.

3. The sample pretreatment apparatus according to claim 2, characterized in that, The drive unit also includes a housing, and the lifting part and the rotating part are disposed within the housing; The lifting part includes a drive motor, a lead screw, and a lifting frame. The drive motor and the lead screw are connected by a transmission to drive the lead screw to rotate. The lead screw is rotatably disposed in the housing in the vertical direction. The lifting frame is movably disposed in the housing in the vertical direction. The rotating part is disposed in the lifting frame. The lifting frame has a threaded hole, and the lead screw is threadedly engaged with the threaded hole.

4. The sample pretreatment apparatus according to claim 3, characterized in that, The lead screw has two parts, the lifting frame has two threaded holes, the two lead screws are connected to the two threaded holes one-to-one, and the rotating part is located between the two lead screws; The lifting mechanism includes two sets of bevel gears. Each set of bevel gears includes a first bevel gear and a second bevel gear that mesh with each other. The drive motor is coaxially connected to the first bevel gears of the two sets of bevel gears via connecting rods. The second bevel gears of the two sets of bevel gears are connected to the two lead screws one-to-one.

5. The sample pretreatment apparatus according to claim 4, characterized in that, The lifting frame has a groove, and two connecting parts are formed on both sides of the groove, and the rotating part is disposed in the groove; Each of the connecting parts is provided with a threaded hole, and the two lead screws are threadedly connected to the corresponding threaded holes of the two connecting parts in a one-to-one correspondence.

6. The sample pretreatment apparatus according to claim 2, characterized in that, The tool holder includes a vertical bar and at least one horizontal bar; The upper end of the vertical rod passes through the opening and is connected to the rotating part, and the horizontal rod is perpendicularly connected to the vertical rod.

7. The sample pretreatment apparatus according to any one of claims 1 to 6, characterized in that, The rotating component includes: Telescopic components are installed on the frame; A power conversion component includes a first part and a second part, wherein the first part is connected to the telescopic component, and the second part is connected to the first part in a transmission manner; A rotating shaft is rotatably mounted on the frame, the second part is connected to the rotating shaft, and the rotating shaft is connected to the side wall of the crushing tank; The first part and the second part cooperate to convert the telescopic movement of the telescopic member into a rotational movement that drives the rotating shaft to rotate.

8. The sample pretreatment apparatus according to claim 7, characterized in that, The first part includes a transmission rod, and the second part includes a meshing first gear and a second gear; The first end of the transmission rod is rotatably connected to the telescopic end of the telescopic component, the second end of the transmission rod is rotatably connected to the eccentric position on the first gear, and the second gear and the rotating shaft are coaxially connected.

9. The sample pretreatment apparatus according to claim 7, characterized in that, The rotating assembly also includes: A protective cover is connected to the frame, and the power conversion component and at least a portion of the telescopic component are disposed within the protective cover.

10. The sample pretreatment apparatus according to any one of claims 1 to 6, characterized in that, The rack includes: A base, wherein the bottom of the base is provided with support legs; A first arm and a second arm are spaced apart from each other and arranged side by side on the base, and the pulverizing tank is rotatably disposed between the first arm and the second arm.

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