Material taking mechanism and sample pretreatment equipment

Abstract

The utility model discloses a material taking mechanism and sample pretreatment equipment, the material taking mechanism comprises a first material taking assembly used for drawing a first material, the first material comprises a fixed part and a moving part which are arranged in a relative sliding mode, a cavity is formed between the fixed part and the moving part, one end of the fixed part is provided with an opening communicated with the cavity, and the other end of the fixed part is provided with a second material taking assembly. The moving direction of the moving part in the fixed part changes the size of a cavity between the fixed part and the moving part; the first material taking assembly comprises a first supporting seat, a clamping part and a push-pull part, and the push-pull part is arranged in a sliding mode relative to the clamping part so as to move towards and away from the clamping part; the clamping part is used for being fixedly connected with the fixed part, and the push-pull part is used for being fixedly connected with the moving part. According to the utility model, the fixed part and the moving part on the first material are respectively fixed through the first material taking assembly, and the push-pull part is driven to realize the relative movement of the fixed part and the moving part, so that the liquid absorption and liquid injection of the first material are realized, and the automation degree and the accuracy of a sample split charging process are improved.

Description

Technical Field

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

[0002] Sample dispensing is a production step in various fields such as petrochemicals, biological testing, and reagent production. Currently, the sample dispensing process often involves drawing samples from storage containers and adding them to sample containers. This process is complex, requiring transfer equipment to perform actions such as drawing, moving, aligning, and dispensing. Current equipment can only achieve partial automation, requiring manual intervention to complete the entire process. Furthermore, in some scenarios, frequent changes of transfer equipment are necessary to avoid cross-contamination risks when sample requirements differ, demanding a higher level of equipment intelligence. However, relying entirely on manual labor, or combining partial automation with manual operation, increases labor costs and introduces human error due to differences in operator experience.

[0003] Therefore, how to improve the accuracy of the sample packaging process and reduce the cost of the production process is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a material handling mechanism to improve the accuracy of the sample dispensing process and reduce the cost of the production process.

[0005] Another objective of this invention is to provide a sample pretreatment device that includes the aforementioned material handling mechanism.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A material-grabbing mechanism includes a first material-grabbing component for picking up a first material. The first material includes a fixed part and a moving part that are slidably disposed relative to each other. A cavity is formed between the fixed part and the moving part. One end of the fixed part is provided with an opening communicating with the cavity. The movement direction of the moving part in the fixed part changes the size of the cavity between the fixed part and the moving part. The first material-grabbing component includes a first support base and a clamping part and a pushing and pulling part disposed on the first support base. The pushing and pulling part is slidably disposed relative to the clamping part to move toward and away from the clamping part. The clamping part is used to fix the fixed part, and the pushing and pulling part is used to fixally connect the moving part.

[0008] Preferably, in the above-mentioned material handling mechanism, the clamping part includes a plurality of spaced-apart grippers, the grippers are connected to the driving part to adjust the clamping range of the grippers, and the outer diameter of the fixing part is located within the clamping range of the grippers; the clamping part also includes a first pressure plate, and the outer wall of the fixing part has a protrusion;

[0009] The first pressure plate engages with the edge of one of the clamping claws to axially press the protrusion against the fixing portion, or the first pressure plate has a recessed groove to axially engage the protrusion against the fixing portion.

[0010] Preferably, in the above-described material handling mechanism, the protrusion is an annular structure and is disposed at the end edge of the fixing part.

[0011] Preferably, in the above-mentioned material handling mechanism, the first pressure plate is a bent plate with an outwardly flared opening side.

[0012] Preferably, in the above-mentioned material handling mechanism, the push-pull part is circumferentially engaged and fixed to the end of the moving part, and the push-pull part includes a second pressure plate, which abuts against the end of the moving part when the push-pull part is fixed to the moving part.

[0013] Preferably, the above-mentioned material handling mechanism further includes a second material handling component for extracting the second material. The second material handling component includes a second support base and a clamping unit disposed on the second support base. The clamping unit clamps the second material from opposite sides of the second material through expansion and contraction actions.

[0014] Preferably, in the above-mentioned material handling mechanism, the lowest operating height of the clamping unit in the vertical direction is lower than the highest operating height of the clamping part in the vertical direction.

[0015] Preferably, in the above-mentioned material handling mechanism, the first support base and the second support base are attached and fixedly disposed on one side, and the clamping unit and the clamping part are located on opposite sides of the first support base.

[0016] Preferably, in the above-mentioned material handling mechanism, the first material is a syringe, the second material is an oil drum, and the first support and the second support are slidably disposed on the track bracket to drive the clamping part, the pushing and pulling part and the clamping unit to move in the guide area of ​​the track bracket; the guide area of ​​the track bracket covers the placement area of ​​the first material and the second material.

[0017] A sample pretreatment device includes the material handling mechanism described in any of the above embodiments.

[0018] As can be seen from the above technical solution, the material handling mechanism provided by this utility model fixes the fixed part of the first material through the clamping part of the first material handling component, and fixes the moving part of the first material through the push-pull part in the first material handling component; the first material handling component can realize the movement of the moving part of the first material relative to the fixed part by driving the movement of the push-pull part relative to the clamping part, and can realize the change of cavity space between the fixed part and the moving part by adjusting the direction of movement; when the cavity between the fixed part and the moving part expands, the external sample can enter the cavity between the fixed part and the moving part from the cavity opening position of the first material through the negative pressure; when the cavity between the fixed part and the moving part shrinks, the first material can be discharged from the cavity opening position. The first material handling component can realize the automated suction and output of the first material sample, thereby improving the automation level of the material handling mechanism and reducing the labor intensity and error of manual operation. Attached Figure Description

[0019] 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 these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the material handling mechanism provided in an embodiment of the present utility model;

[0021] Figure 2 for Figure 1 A schematic diagram of the first material handling component in the process;

[0022] Figure 3 A detailed view of the clamping and pushing / pulling parts in the first material handling assembly;

[0023] Figure 4 A schematic diagram of the sample pretreatment equipment provided in an embodiment of this utility model.

[0024] Wherein, 10-first material handling assembly; 110-first support base; 120-clamping part; 1210-gripper; 1220-first pressure plate; 130-push-pull part; 1310-second pressure plate; 20-first material; 210-fixing part; 2110-protrusion part; 220-moving part; 30-track bracket; 40-second material handling assembly; 410-second support base; 420-clamping unit; 50-second material; 100-material handling mechanism. Detailed Implementation

[0025] The core of this utility model lies in disclosing a material handling mechanism to improve the accuracy of the sample dispensing process and reduce the cost of the production process.

[0026] Another objective of this utility model is to disclose a sample pretreatment device that includes the above-mentioned material handling mechanism.

[0027] To enable those skilled in the art to better understand the present invention, embodiments of the present invention will be described below with reference to the accompanying drawings. Furthermore, the embodiments shown below do not limit the scope of the invention as described in the claims. Additionally, the complete contents of the configurations shown in the following embodiments are not limited to those necessary for the solution of the invention as described in the claims.

[0028] like Figure 1 As shown, the material handling mechanism provided in this embodiment of the present invention includes a first material handling component 10 for extracting a first material 20. It should be noted that the first material 20 here is a container for sample extraction and dispensing, while the first material handling component 10 is a component for picking up, placing, and transferring the first material 20. Specifically, the first material 20 includes a fixed part 210 and a moving part 220. The fixed part 210 and the moving part 220 are sleeved together to form a cavity with a single opening, so that the sample can be drawn and dispensed from the opening of the cavity. The opening of the cavity is located at one end of the fixed part 210. At the same time, the fixed part 210 and the moving part 220 are slidably arranged. The cavity with only a single opening can expand when the fixed part 210 and the moving part 220 slide relative to each other, forming a cavity with a negative pressure state for sample drawing. At the same time, when the fixed part 210 and the moving part 220 slide relative to each other, the cavity can shrink, allowing the sample inside the cavity to flow out from the opening for dispensing.

[0029] Based on this, the first material handling assembly 10 includes a first support base 110, a clamping part 120, and a push-pull part 130. The first support base 110 is a basic load-bearing structure, while the clamping part 120 and the push-pull part 130 are both disposed on the first support base 110. In particular, the push-pull part 130 is slidably disposed relative to the clamping part 120 to enable movement toward and away from the push-pull part 130. It should be noted that in some embodiments of this utility model, the clamping part 120 is fixedly disposed on the first support base 110 by bolts, and the first support base 110 is also provided with a sliding groove. One side of the push-pull part 130 is provided with a protrusion to insert into the sliding groove, so that the push-pull part 130 can slide relative to the clamping part 120 in the guiding direction of the sliding groove. The movement drive of the push-pull part 130 can be realized by commonly used power components such as motors, cylinders, or hydraulic cylinders, which will not be described in detail here.

[0030] For the first material handling component 10 provided in the above embodiment, the clamping part 120 is used to fix and lock the fixing part 210 in the first material 20 so that the clamping part 120 and the fixing part 210 maintain the same operating state; while the push-pull part 130 is used to be fixedly connected to the moving part 220 in the first material 20. Based on the assembly relationship between the clamping part 120 and the push-pull part 130 on the first support 110, after the clamping part 120 is connected to the fixing part 210 and the push-pull part 130 is fixed to the moving part 220, the push-pull part 130 drives the moving part 220 to move away from and towards the fixing part 210 by performing a moving away and approaching action relative to the clamping part 120. The cavity structure formed by the moving part 220 and the fixing part 210 can generate spatial changes, thereby realizing the suction and filling of the sample.

[0031] It should also be noted that the material handling mechanism provided in this embodiment of the present invention can also be provided with a track support 30, and the first support seat 110 can be slidably disposed on the track support 30 so that, under the guidance of the track support 30, the clamping part 120 and the pushing and pulling part 130 can move within the guide area of ​​the track support 30. The track support 30 is configured according to the actual working conditions. It needs to meet the requirement that the first support seat 110 can carry the clamping part 120 and the pushing and pulling part 130 to various working positions. Typically, the guide area of ​​the track support 30 is set along at least three mutually perpendicular directions. That is, with the horizontal plane as the reference plane, the setting direction of the track support 30 needs to be set along the X, Y and Z directions. The setting length of each direction is extended or shortened according to the operating requirements of the first support seat 110 so that the first support seat 110 can be adjusted in the X, Y and Z directions within the setting space of the track support 30, thereby enabling the clamping part 120 and the pushing and pulling part 130 to smoothly switch working positions.

[0032] Based on the above structure, in some embodiments of this utility model, the first support base 110 drives the clamping part 120 and the push-pull part 130 to move to the placement area of ​​the first material 20, and moves under the guidance of the track bracket 30, so that the clamping part 120 in the first material taking component 10 fixes the fixing part 210 of the first material 20, and the push-pull part 130 in the first material taking component 10 fixes the moving part 220 of the first material 20; after the first material taking component 10 completes the clamping of the first material 20, the first support base 110 moves to the first position under the guidance of the track bracket 30. The first position is the sample taking position, where the sample material with an opening is placed. After the first support base 110 drives the extraction area of ​​the first material 20 to insert the sample, the power element drives the push-pull part 130 to move away from the clamping part 120, so that the cavity between the fixed part 210 and the moving part 220 expands, and the sample enters the cavity between the fixed part 210 and the moving part 220 through negative pressure. After the sample is aspirated, the first support base 110 moves to the second position under the guidance of the track bracket 30. The second position is the sample filling position, which is equipped with a container for dispensing the sample. After the first support base 110 drives the extraction area of ​​the first material 20 to align with the container for dispensing the sample, the power element drives the push-pull part 130 to move closer to the clamping part 120, so that the cavity between the fixed part 210 and the moving part 220 contracts, and pushes the sample in the cavity into the container for dispensing the sample, thus completing the sample dispensing.

[0033] It should also be noted that if the first material 20 needs to be replaced, it is only necessary to release or remove the used first material 20, and then move the clamping part 120 and the push-pull part 130 to the placement area of ​​the first material 20 again through the first support 110, and then fix the unused first material 20 in the placement area.

[0034] Furthermore, in some embodiments of this utility model, the clamping part 120 includes a plurality of spaced-apart grippers 1210, and the grippers 1210 are tractively connected to a driving part for adjusting the opening and clamping range of the grippers 1210. Preferably, the grippers 1210 are open on one side to improve the convenience of the clamping action. It should also be noted that the outer diameter of the fixing part 210 is within the clamping range of the grippers 1210. Based on this, the grippers 1210 can open under the action of the driving part, and make its clamping size larger than the outer diameter of the fixing part 210. The first support seat 110 drives the clamping part 120 to move toward the first material 20, thereby realizing the engagement of the opening of the grippers 1210 with the fixing part 210. After the grippers 1210 have completed engagement with the fixing part 210, the driving part drives the grippers 1210 to retract to achieve rapid clamping of the fixing part 210. Similarly, when it is necessary to release the first material 20 after use, the gripper 1210 only needs to open to unlock the fixing part 210, thereby removing the first material 20.

[0035] Based on the above embodiments, it is preferable that at least two sets of grippers 1210 are arranged in parallel, and the two sets of grippers 1210 are spaced apart along the axial direction of the first material 20, so as to improve the gripping stability of the clamping part 120 on the fixing part 210 and avoid the fixing part 210 from slipping off when the clamping force of a single set of grippers 1210 fails, thus affecting the production process.

[0036] It should be noted that the gripper 1210 can also be a structure that is fixed on one side and movable on the other side, and its gripping area can be expanded and contracted by a motor drive. Thus, the gripper 1210 can expand to surround the outer wall of the fixed part 210, and then contract to clamp the fixed part 210.

[0037] Furthermore, to improve the connection stability between the clamping part 120 and the fixing part 210, in some embodiments of this utility model, the clamping part 120 further includes a first pressure plate 1220. Correspondingly, the outer wall of the fixing part 210 has a protrusion 2110, which protrudes from the outer wall of the fixing part 210 in a direction away from the axis of the fixing part 210. The first pressure plate 1220 is used to lock and limit the protrusion 2110. Since the connection between the clamping part 120 and the fixing part 210 is achieved through the friction between the gripper 1210 and the fixing part 210, the fixing part 210 will be subjected to an axial force during the process of the clamping part 120 driving the moving part 220 to slide relative to the fixing part 210 to achieve the absorption and discharge of the sample in the first material 20. Therefore, there is a risk that the fixing part 210 will slide relative to the clamping part 120 to overcome the friction. Thus, the first pressure plate 1220 is provided to improve the stability of the fixing part 210 during the sample absorption and discharge process.

[0038] In some embodiments of this utility model, the first pressure plate 1220 and the edge of a single gripper 1210 are spaced apart axially in the fixing part 210. The space between the gripper 1210 and the first pressure plate 1220 is used to limit the fixing part 210 axially. The first pressure plate 1220 only needs to be a single-layer plate structure to cooperate with the gripper 1210 to limit and lock the fixing part 210. In other embodiments of this utility model, the first pressure plate 1220 has a recessed groove structure to clamp the protrusion 2110 axially in the fixing part 210. It should be noted that the recessed groove can be a single pressure plate recess or two spaced pressure plates, as long as the first material handling assembly 10 has a structure that can clamp and limit the protrusion 2110 axially.

[0039] Furthermore, in the material handling mechanism provided in this embodiment of the present invention, the protrusion 2110 provided on the outer wall of the fixing part 210 is preferably configured as an annular structure, so as to have a circumferential protrusion in all directions, so that when the clamping part 120 is connected to the fixing part 210 at any angle, the first pressure plate 1220 can dock with a part of the protrusion 2110 to limit the fixing part 210. It should also be noted that the protrusion 2110 is preferably located at the end edge of the fixing part 210 to avoid the protrusion 2110 affecting the main structure of the fixing part 210. The gripper 1210 can connect and fix the main body in the main area of ​​the fixing part 210, while the first pressure plate 1220 can lock the fixing part 210 at the end. When the first pressure plate 1220 cooperates with a single gripper 1210 to axially press the fixing part 210, the gripper 1210 can also be located at the end of the fixing part 210, and can cooperate with other grippers 1210 to achieve the effect of connecting and locking the fixing part 210 at both ends in the axial direction, thereby improving the connection stability of the fixing part 210 and reducing the risk of the fixing part 210 deflecting when the moving part 220 moves relative to it.

[0040] Furthermore, considering that the first pressure plate 1220 engages with the protrusion 2110 by lateral insertion when pressing it, which requires high precision and carries a certain risk of engagement failure, in order to improve the engagement difficulty between the first pressure plate 1220 and the protrusion 2110, in some embodiments of this utility model, the first pressure plate 1220 is a bent plate with an outwardly expanding opening side. This makes the recessed groove structure formed by the first pressure plate 1220 itself, or the edge of the first pressure plate 1220 and the gripper 1210, a variable cross-section recessed structure with a larger spacing on the opening side and a smaller spacing on the closed side. The outwardly expanding first pressure plate 1220 can provide a larger docking opening, thereby reducing the docking precision requirement of the protrusion 2110 on the fixing part 210 and reducing the difficulty of limiting the protrusion 2110 by the first pressure plate 1220.

[0041] Furthermore, in the material handling mechanism provided in this embodiment of the present invention, the push-pull part 130 also needs to be connected to the moving part 220 circumferentially when it is fixedly connected to the moving part 220. However, based on the structure of the first material 20, the push-pull part 130 needs to apply an axial force to the moving part 220 to drive it. When the suction and filling resistance of the sample is large, there is a certain risk of the push-pull part 130 falling off in the small contact area with the moving part 220. Therefore, in some embodiments of the present invention, the push-pull part 130 includes a second pressure plate 1310. Specifically, the second pressure plate 1310 is integrally fixed with the push-pull part 130, and when the push-pull part 130 is fixed to the moving part 220, it abuts against the end of the moving part 220. This allows the push-pull part 130 to apply a force to the moving part 220 through the circumferential fixing effect and the surface contact effect at the end when it drives the moving part 220 to move, thereby improving the driving stability of the push-pull part 130 on the moving part 220.

[0042] To improve the versatility of the material-taking mechanism provided in this embodiment, in some embodiments of this utility model, the material-taking mechanism further includes a second material-taking component 40 for extracting the second material 50. It should be noted that the second material 50 is a container structure for holding the sample before dispensing, which is placed in a designated position after the operator adds the sample. Correspondingly, the second material-taking component 40 specifically includes a second support base 410 and a clamping unit 420 disposed on the second support base 410. Similar to the first support base 110, the second support base 410 is also slidably disposed on the track bracket 30 to drive the clamping unit 420 to move within the guide area of ​​the track bracket 30, thereby achieving positional movement of the clamping unit 420. It should be noted that the position adjustment range of the second support base 410 includes at least the placement position of the second material 50 and the suction position for extracting the sample from the second material 50. The clamping unit 420 can adopt a two-plate structure. The clamping plates cooperate with the opposite side structures of the second material 50 to fit against the side walls of the second material 50. At the same time, the two clamping plates of the clamping unit 420 can move relative to each other or in opposite directions to clamp the second material 50 from opposite sides through the expansion and contraction of the two clamping plates. Then, the second material 50 is transferred through the sliding action of the second support 410.

[0043] Based on the above structure, the material-taking mechanism can clamp the second material 50 placed at a designated position through the second material-taking component 40, and transfer the second material 50 to the working position for sample aspiration from the second material 50 through the sliding action of the second support base 410. Correspondingly, the first material-taking component 10 clamps the first material 20 at the setting position, and moves the first material 20 above the second material 50 through the sliding action of the first support base 110. Then, through the action of the push-pull part 130 in the first material-taking component 10, the moving part 220 slides relative to the fixed part 210, thereby realizing the process of sample aspiration from the second material 50 into the first material 20. After the sample aspiration is completed in the first material 20, the first support base 110 moves the first material 20 to the sample dispensing position, and through the action of the push-pull part 130, the moving part 220 slides relative to the fixed part 210, thereby realizing the sample output dispensing action from the inside of the first material 20.

[0044] Furthermore, to avoid interference between the first material-picking component 10 and the second material-picking component 40 during operation, especially when the first material 20 and the second material 50 are arranged in a batch array, there is a risk of collision between the other material-picking component and the material when a single material-picking component is picking up a single material. Therefore, in some embodiments of this utility model, the lowest operating height of the clamping unit 420 is lower than the highest operating height of the clamping part 120 in the vertical direction. At this time, when the clamping unit 420 picks up the second material 50, it descends to the lowest height while the clamping part 120 rises to the highest operating height. The clamping part 120 will not come into contact with or collide with the second material 50 in the height direction, thus ensuring the smooth operation of the second material-picking component 40.

[0045] It should also be noted that when the first material 20 is also at risk of collision, the minimum operating height of the clamping part 120 in the vertical direction can also be lower than the maximum operating height of the clamping unit 420, so as to meet the safe handling requirements of the first material 20.

[0046] It should be further explained that the first support base 110 and the second support base 410 can be separately mounted on the track bracket 30 to move independently along the guide area of ​​the track bracket 30. At the same time, in order to improve the integration of the material picking mechanism, the first support base 110 and the second support base 410 are attached and fixed on one side to form an integral structure. Meanwhile, the clamping unit 420 and the clamping part 120 are located on opposite sides of the first support base 110. At the same time, the material picking mechanism picks up the first material 20 and the second material 50 independently and not synchronously. That is, the material picking mechanism can only pick up one type of material at a single point in time, and after completing the picking up and placement of one type of material, it will pick up the other type of material.

[0047] Furthermore, in some embodiments of this utility model, the first material 20 is a syringe, the second material 50 is an oil drum, and the guide area of ​​the track support 30 needs to cover the placement areas of the first material 20 and the second material 50 so as to enable the syringe and oil drum in different areas to be accessed.

[0048] Furthermore, this utility model embodiment also provides a sample pretreatment device, which includes the material handling mechanism 100 provided in any of the above embodiments. It should be noted that, since the material handling mechanism 100 possesses the aforementioned technical effects, the sample pretreatment device also possesses the aforementioned technical effects, which will not be elaborated upon here.

[0049] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0050] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0051] The above description is merely a preferred embodiment of this utility model and an explanation of the technical principles employed, and is not intended to limit this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. The scope of this utility model is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this utility model.

Claims

1. A material taking-out mechanism characterized by comprising: The utility model provides a first material taking assembly (10) for drawing first material (20), and the first material (20) includes fixed part (210) and moving part (220) of relative sliding arrangement, and the fixed part (210) and the moving part (220) form cavity between, and the fixed part (210) one end is provided with the opening of communication with the cavity, and the moving part (220) in the fixed part (210) movement direction changes the cavity size between the fixed part (210) and the moving part (220), and the first material taking assembly (10) includes first support seat (110) and setting on the first support seat (110) clamping part (120) and push -and -pull part (130), and the push -and -pull part (130) is relative clamping part (120) sliding arrangement to move towards and away from clamping part (120), and clamping part (120) is used for fixing the fixed part (210), and the push -and -pull part (130) is then used for fixing connection moving part (220).

2. The material taking-out mechanism according to claim 1, wherein The clamping part (120) includes a plurality of interval arrangement's clamping jaw (1210), and the clamping jaw (1210) is driven part transmission connection to adjust the clamping range of clamping jaw (1210), and the outer diameter of fixed part (210) is located in the clamping range of clamping jaw (1210), and the clamping part (120) further includes first pressing plate (1220), and the outer wall of fixed part (210) has protruding part (2110). The first pressing plate (1220) cooperates with the edge of a single clamping jaw (1210) to axially compress the protruding part (2110) of the fixed part (210), or the first pressing plate (1220) has a recessed groove to axially clamp the protruding part (2110) of the fixed part (210).

3. The material taking-out mechanism according to claim 2, wherein The protruding part (2110) is an annular structure and is arranged at the end edge of the fixed part (210).

4. The material taking-out mechanism according to claim 2, wherein The first pressing plate (1220) is a bent plate member with an open side expanding outward.

5. The material taking-out mechanism according to claim 1, wherein The push -and -pull part (130) is circumferentially clamped and fixed with the end of the moving part (220), and the push -and -pull part (130) includes a second pressing plate (1310), which abuts against the end of the moving part (220) when the push -and -pull part (130) is fixed with the moving part (220).

6. The material taking-out mechanism according to claim 1, wherein The utility model also provides a second material taking assembly (40) for extracting second material (50), and the second material taking assembly (40) includes a second support seat (410) and a clamping unit (420) arranged on the second support seat (410), and the clamping unit (420) clamps the second material (50) from the opposite sides of the second material (50) through expansion and contraction action.

7. The material taking-out mechanism according to claim 6, wherein The lowest running height of the clamping unit (420) in the vertical direction is lower than the highest running height of the clamping part (120) in the vertical direction.

8. The material taking-out mechanism according to claim 6, wherein The first support base (110) is fixedly arranged on one side of the second support base (410), and the clamping unit (420) and the clamping part (120) are located on the opposite sides of the first support base (110).

9. The material taking-out mechanism according to claim 6, wherein The first material (20) is a syringe, the second material (50) is an oil drum, the first support base (110) and the second support base (410) are both slidingly arranged on a track support (30) to drive the clamping part (120), the push-pull part (130) and the clamping unit (420) to move in a guide area of the track support (30); the guide area of the track support (30) covers a placement area of the first material (20) and the second material (50).

10. A sample pre-treatment device, characterized by The material taking mechanism (100) according to any one of claims 1-9.

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