A material cylinder capable of high-precision dosing

Abstract

The utility model discloses a kind of material cylinders with high-precision sampling, including cylinder and the discharging mechanism in cylinder, the discharging mechanism includes plug rod and sleeve;One end of the plug rod is arranged in the discharge port of cylinder for opening or closing discharge port, the other end of the plug rod is used to and driving mechanism connection to drive plug rod lifting or rotation;The sleeve is sleeved on the plug rod, and stirring element is provided on the sleeve towards discharge port;Linkage limiting structure is provided between the plug rod and the sleeve, for enabling the plug rod can be independently lifted relative to sleeve to open discharge port, and make rotating plug rod drive sleeve and stirring element together rotate when discharging.The utility model has the advantages of simple and compact structure, convenient and reliable operation, rod lifting does not affect stirring effect, high sampling precision and the like.

Description

Technical Field

[0001] This utility model relates to the field of material sampling technology, specifically to a material cylinder capable of high-precision sampling. Background Technology

[0002] In industries such as chemical engineering, pharmaceuticals, and biotechnology, precise quantitative dosing of powders, granules, and other materials is frequently required. As a common device for storing and distributing materials, the dosing accuracy of the material container directly affects product quality, formulation consistency, and production efficiency. For materials that are prone to settling, agglomerating, or have poor flowability, a stirring device is usually required inside the material container to agitate the material before or during dosing, ensuring its uniformity. This is a prerequisite for achieving high-precision dosing. In existing technologies, a common solution is to use an integrated stirring-discharge rod. This structure integrates stirring and opening / closing functions onto a single rod. This rod rotates as a stirring rod to disperse the material, and its bottom acts as a stopper rod, opening or closing the discharge port through lifting and lowering motion. This existing technology has the following shortcomings: During the sample feeding and discharging process, the lifting and lowering of the blocking rod will drive the lifting and lowering of the stirring rod. For some powders that are prone to clumping, when the lifting and lowering of the blocking rod drives the stirring rod away from the discharge port, clumps will form at the discharge port, which will seriously affect the discharge effect, resulting in slow discharge or no discharge, and thus the fine and high-precision feeding operation cannot be achieved.

[0003] Secondly, it cannot achieve high-precision stepless adjustment of multiple discharge flow rates. To achieve multiple discharge flow rates, the discharge port must have multiple opening sizes (the larger the opening, the larger the discharge volume; the smaller the opening, the smaller the discharge volume), which means that the blocking rod must be raised and lowered at multiple heights to adjust the various opening sizes of the discharge port. However, because the raising and lowering of the blocking rod will cause the stirring rod to rise and fall together, the rising and falling movement of the stirring rod during the adjustment will cause clumping or blockage at the discharge port. If the discharge is clumped or completely blocked, then high-precision multi-discharge flow rate sampling is out of the question. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a material cylinder with a simple and compact structure, convenient and reliable operation, and high-precision sample addition that does not affect the stirring effect when the rod is raised or lowered.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A high-precision sample dispensing cylinder includes a cylinder body and a dispensing mechanism disposed within the cylinder body. The dispensing mechanism includes a plug rod and a sleeve. One end of the plug rod passes through the dispensing port of the cylinder body to open or close the dispensing port, and the other end of the plug rod is connected to a drive mechanism to drive the plug rod to rise, fall, or rotate. The sleeve is fitted over the plug rod, and a stirring element is provided on the sleeve facing the dispensing port. A linkage limiting structure is provided between the plug rod and the sleeve to allow the plug rod to rise and fall independently relative to the sleeve to open the dispensing port, and to cause the rotating plug rod to drive the sleeve and the stirring element to rotate together during dispensing.

[0006] As a further improvement to the above technical solution: The linkage limiting structure includes a vertical limiting groove and a limiting bolt. The vertical limiting groove is vertically opened on the sleeve, and the limiting bolt is movably inserted into the vertical limiting groove and fixedly connected to the blocking rod.

[0007] The linkage limiting structure includes a meshing toothed part and a toothed groove part; the toothed part and the toothed groove part are respectively provided on the contact surface of the plug rod and the sleeve, which are used to allow the plug rod to move up and down independently along the axial direction relative to the sleeve, or to drive the sleeve to rotate synchronously when the plug rod rotates.

[0008] The bottom end of the plug rod is provided with a conical plug that matches the discharge port. When discharging, the plug rod drives the conical plug to rise and fall within the discharge port to control the discharge flow rate.

[0009] The stirring component includes stirring blades and connecting plates. One end of the stirring blades is detachably mounted on the sleeve via the connecting plates, and the bottom of the other end of the stirring blades is positioned near the discharge port to ensure smooth discharge from the discharge port during rotation.

[0010] It is also equipped with a rotary lifting drive mechanism, which is connected to the top end of the blocking rod to drive the blocking rod to perform lifting or rotating movements.

[0011] The rotary lifting drive mechanism includes a servo motor for driving the lifting of the stop bar and a stepper motor for driving the rotation of the stop bar.

[0012] The sleeve is rotatably mounted on the cylinder body via at least two bearing seats. The end of the blocking rod extending upward beyond the sleeve is provided with a protruding limiting block. A reset elastic element is fitted on the blocking rod between the limiting block and the top of the sleeve so that the blocking rod can be reset when it moves up and down.

[0013] The top of the cylinder is provided with a barrel cover, on which a feed port and a drive port are opened. One end of the plug rod extends from the drive port to facilitate connection with the drive mechanism.

[0014] An installation cylinder is connected to the barrel cover below the drive port, and the sleeve is rotatably installed inside the installation cylinder; a hopper is formed inside the cylinder on one side of the installation cylinder, and the hopper is connected to the discharge port and the inlet port respectively.

[0015] Compared with the prior art, the advantages of this utility model are: Firstly, this utility model features a high-precision sample dispensing cylinder. Through the design of a special plug rod, sleeve, and linkage limiting structure, the plug rod can independently rise and fall relative to the sleeve to open the discharge port. This ensures that the mixing end of the agitator is always in an optimal mixing position, preventing blockage of the discharge port. Furthermore, during subsequent discharge, the rotating plug rod drives the agitator, which is in the optimal mixing position, to rotate as well, preventing caking, slow discharge, or no discharge at all. This ensures smooth discharge and excellent sample dispensing results. By opening a small-diameter discharge port and coordinating the rapid response of the plug rod, fine, high-precision dispensing operations are effectively achieved.

[0016] Secondly, the high-precision sample dispensing cylinder of this invention features a stopper rod that can be independently raised and lowered relative to the sleeve. The agitator is always in the optimal agitation position, allowing for stepless adjustment of the stopper rod's height and achieving high-precision stepless adjustment of various discharge flow rates. In other words, regardless of whether the discharge port has a large or small opening diameter, the agitator in the optimal position ensures smooth discharge through agitation, resulting in excellent high-precision sample dispensing.

[0017] Thirdly, the high-precision sample feeding cylinder of this utility model, with its stirring component always in an optimal stirring position, can effectively and continuously shear and mix the material near the discharge port, ensuring the uniformity of the material state and thus guaranteeing the consistency of each sample feeding.

[0018] Fourthly, the high-precision sample-adding cylinder of this utility model features a limiting bolt that moves vertically within a vertical limiting groove. When the plug rod rises or falls, the limiting bolt in the vertical direction can move up and down within the groove without causing the sleeve to rise or fall with it. However, when the plug rod rotates, the limiting bolt in the horizontal direction causes the sleeve to rotate with it. This linkage limiting structure design is simple to process, easy to manufacture, and highly stable. The plug rod and sleeve can be disassembled, cleaned, replaced, or repaired simply by removing the limiting bolt.

[0019] Fifth, the high-precision sample feeding cylinder of this utility model can withstand greater rotational resistance by setting toothed body and toothed groove, so it can be equipped with larger and more effective stirring blades for stirring materials with extremely high viscosity, and avoids single-point stress concentration, which greatly improves the fatigue resistance and wear resistance of the cylinder and extends its service life.

[0020] Sixth, this utility model's high-precision sample dispensing cylinder uses a conical plug to continuously and precisely control the discharge flow rate. When the conical plug is driven to its highest point by the drive mechanism, its conical surface tightly fits the conical inner wall (or edge) of the discharge port, forming a line or surface contact seal. This provides excellent sealing and achieves zero leakage, which is the foundation for high-precision sample dispensing. When the drive mechanism precisely lowers the plug rod a certain distance, an annular gap is formed between the conical plug and the discharge port. The cross-sectional area of ​​this gap determines the material flow capacity. The larger the gap, the greater the flow rate; the smaller the gap, the smaller the flow rate. Because the lifting and lowering of the plug rod is controlled by a high-precision drive mechanism, its lifting height can be precisely controlled. The design of the conical plug, combined with the design that the stirring component is always in an optimal stirring position, achieves extremely precise and continuous adjustment of the discharge gap size (i.e., the discharge flow rate).

[0021] Seventh, this utility model features a high-precision sample dispensing cylinder. By using a connecting plate, the stirring blades can be detachably connected to the sleeve, facilitating blade replacement and significantly reducing maintenance costs. Furthermore, stirring blades of different sizes and materials can be used for materials of varying viscosities and properties, greatly improving the device's applicability. Positioning the stirring blades close to the discharge port effectively prevents blockage and significantly improves the uniformity of the material at the discharge port.

[0022] Eighth, the material cylinder of this utility model can be used to add samples with high precision. By connecting a rotary lifting drive mechanism to the top of the plug rod, the plug rod can be driven to move up and down or rotate, so as to accurately control the lifting height of the plug rod. This allows for precise control of the annular gap between the conical plug and the discharge port, and enables stepless and precise adjustment of the material flow rate.

[0023] Ninthly, the high-precision sample-adding cylinder of this utility model significantly improves the stability of the cylinder rotation by setting a bearing seat, and bears radial force when the stirring component rotates, preventing the cylinder from deforming under stress. Furthermore, by setting a protruding limiting block at the end of the plug rod extending upwards beyond the cylinder, and setting a reset elastic element on the plug rod between the limiting block and the top of the cylinder, when the servo motor stops rising, the plug rod, under the action of the reset elastic element, has its conical plug subjected to a constant and repeatable force pressed against the discharge port, ensuring that the sealing force is consistent each time it closes, thereby guaranteeing the repeatability of the closure and the reliability of the seal, preventing material leakage. On the other hand, the reset elastic element acts as a buffer, reducing wear on the sealing surface and extending the service life of the device.

[0024] The tenth feature is a high-precision sample dispensing cylinder. The cylinder is easily disassembled and reassembled with a lid, greatly reducing maintenance difficulty and improving efficiency. A drive port is provided, and one end of a plug rod extends from the drive port to connect with the drive mechanism, preventing vibrations from the drive mechanism operating inside the cylinder that could cause unstable connections between components.

[0025] The eleventh feature of this utility model is a high-precision sample feeding cylinder. By setting an installation cylinder to isolate the material from the sleeve, it avoids the lubricating oil inside the sleeve from contaminating the material, and also prevents the material from entering between the sleeve and the plug rod and affecting the independent lifting and lowering movement of the plug rod, thus further improving the reliability of the device. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the three-dimensional structure of a material cylinder capable of high-precision sample addition according to this utility model.

[0027] Figure 2 This is a schematic diagram of the cross-sectional structure of this utility model.

[0028] Figure 3 This is a schematic diagram of the explosion structure principle of this utility model.

[0029] The labels in the diagram represent: 1. Cylinder body; 11. Discharge port; 12. Bucket cover; 13. Feed inlet; 14. Drive port; 15. Mounting cylinder; 16. Hopper; 2. Plug rod; 21. Conical plug; 22. Limiting block; 3. Sleeve; 31. Vertical limiting groove; 32. Bearing seat; 4. Agitator; 41. Agitator blade; 42. Connecting piece; 5. Limiting bolt; 6. Reset elastic element. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] Example 1 like Figures 1 to 3 As shown, the high-precision sample feeding cylinder of this embodiment includes a cylinder body 1 and a discharge mechanism disposed within the cylinder body 1. The discharge mechanism includes a plug rod 2 and a sleeve 3. One end of the plug rod 2 passes through the discharge port 11 of the cylinder body 1 to open or close the discharge port 11, and the other end of the plug rod 2 is used to connect with a drive mechanism to drive the plug rod 2 to rise or rotate. The sleeve 3 is sleeved outside the plug rod 2, and a stirring element 4 is provided on the sleeve 3 facing the discharge port 11. A linkage limiting structure is provided between the plug rod 2 and the sleeve 3 to allow the plug rod 2 to rise and fall independently relative to the sleeve 3 to open the discharge port 11, and to cause the rotating plug rod 2 to drive the sleeve 3 and the stirring element 4 to rotate together during discharge.

[0035] The specific implementation principle is as follows: like Figure 2As shown, at this time, the blocking rod 2 blocks the discharge port 11, and the end of the agitator 4 on one side of the blocking rod 2 is close to the discharge port 11, in an optimal agitation position. When high-precision sample addition and discharge are required, the drive mechanism drives the blocking rod 2 to descend, and the blocking rod 2 no longer blocks the discharge port 11, allowing the discharge port 11 to be opened for discharge. Because there is a linkage limiting structure between the blocking rod 2 and the sleeve 3, the descending blocking rod 2 can descend independently relative to the sleeve 3. Therefore, the sleeve 3 will not descend with the blocking rod 2, and the agitator 4 on the sleeve 3 will not descend with the blocking rod 2. Thus, the agitator end of the agitator 4 is still in an optimal agitation position and will not block the discharge port 11. Then the drive mechanism drives the plug rod 2 to rotate. Due to the special design of the linkage limit structure, the rotating plug rod 2 will drive the sleeve 3 to rotate together, which in turn drives the agitator 4 on the sleeve 3, which is in the optimal stirring position, to rotate together. This allows the discharge port 11 to discharge smoothly, regardless of whether the opening diameter is large or small. By opening the small diameter discharge port 11 and cooperating with the rapid response of the plug rod 2, high-precision sample feeding can be achieved.

[0036] When the high-precision sample addition and discharging operation is completed, the drive mechanism drives the blocking rod 2 to rise, and the blocking rod 2 blocks the discharge port 11 again, closing the discharge port 11. Because of the linkage limiting structure between the blocking rod 2 and the sleeve 3, the rising blocking rod 2 can rise independently relative to the sleeve 3. Therefore, the sleeve 3 does not rise with the blocking rod 2, and the stirring component 4 on the sleeve 3 also does not rise with the blocking rod 2. Thus, the end of the stirring component 4 remains in an optimal stirring position, effectively ensuring the next high-precision sample addition and stirring operation. The above-mentioned special scientific design has the following advantages: Firstly, the high-precision sample dispensing cylinder of this invention, through the setting of a special plug rod 2, sleeve 3, and linkage limiting structure, allows the plug rod 2 to rise and fall independently relative to the sleeve 3 to open the discharge port 11. This ensures that the stirring end of the stirring component 4 is always in an optimal stirring position, preventing blockage of the discharge port 11. Furthermore, during subsequent dispensing, the rotating plug rod 2 can drive the stirring component 4, which is in the optimal stirring position, to rotate together, preventing caking, slow dispensing, or no dispensing at all, thus ensuring smooth dispensing and excellent sample dispensing effect. By opening a small-diameter discharge port 11 and coordinating with the rapid response of the plug rod 2, fine and high-precision dispensing operations are also well achieved.

[0037] Secondly, the high-precision sample dispensing cylinder of this invention features a stopper rod 2 that can be independently raised and lowered relative to the sleeve 3, ensuring that the agitator 4 is always in the optimal agitation position. Therefore, the raising and lowering of the stopper rod 2 can be infinitely adjusted to multiple heights, achieving high-precision infinitely adjustable discharge flow rates. In other words, regardless of whether the discharge port 11 has a large or small opening diameter, the agitator 4 in the optimal position can ensure smooth discharge through agitation, resulting in excellent high-precision sample dispensing.

[0038] Thirdly, the high-precision sample feeding cylinder of this utility model, with the stirring component 4 always in an optimal stirring position, can continuously shear and mix the material near the discharge port 11 with excellent effect, which ensures the uniformity of the material state and thus ensures the consistency of each sample feeding.

[0039] like Figure 2 and Figure 3 As shown, in this embodiment, the linkage limiting structure includes a vertical limiting groove 31 (including an oblong hole, a rectangular groove, etc.) and a limiting bolt 5. The vertical limiting groove 31 is vertically formed on the sleeve 3, and the limiting bolt 5 is movably inserted into the vertical limiting groove 31 and fixedly connected to the blocking rod 2. By setting the limiting bolt 5 to move vertically through the vertical limiting groove 31, when the blocking rod 2 rises and falls, the limiting bolt 5 in the vertical direction can move up and down within the vertical limiting groove 31, and the limiting bolt 5 will not drive the sleeve 3 to rise and fall together. However, when the blocking rod 2 rotates, the limiting bolt 5 in the left and right direction will drive the sleeve 3 to rotate together. This linkage limiting structure design is simple to process, easy to manufacture, and has strong stability. Only the limiting bolt 5 needs to be removed to disassemble, clean, replace, or repair the blocking rod 2 and the sleeve 3.

[0040] like Figure 2 and Figure 3As shown, in this embodiment, the bottom end of the plug rod 2 is provided with a conical plug 21 that cooperates with the discharge port 11. During discharge, the plug rod 2 drives the conical plug 21 to rise and fall within the discharge port 11 to control the discharge flow rate. It should be noted that in this embodiment, the conical plug 21 has a small top diameter and a large bottom diameter. The conical plug 21 is located outside the cylinder 1. The discharge port 11 is opened by descending downwards, and the size of the discharge port 11 is gradually adjusted by rising upwards to close the discharge port 11. In other embodiments, a conical plug 21 with a large top diameter and a small bottom diameter can also be used. The conical plug 21 is located inside the cylinder 1. The discharge port 11 is opened by rising upwards, and the size of the discharge port 11 is gradually adjusted by descending downwards to close the discharge port 11. All of these are within the protection scope of this utility model. By setting a conical plug 21, the discharge flow rate can be continuously and precisely controlled. When the conical plug 21 is driven to its highest point by the drive mechanism, its conical surface fits tightly against the conical inner wall (or edge) of the discharge port 11, forming a line contact or surface contact seal. The sealing effect is excellent, achieving zero leakage, which is the basis for high-precision sample addition. When the drive mechanism controls the plug rod 2 to descend precisely a certain distance, an annular gap is formed between the conical plug 21 and the discharge port 11. The cross-sectional area of ​​this gap determines the material flow capacity. The larger the gap, the greater the flow rate; the smaller the gap, the smaller the flow rate. Since the lifting and lowering of the plug rod 2 is controlled by a high-precision drive mechanism, its lifting height can be precisely controlled. The design of the conical plug 21, combined with the design of the agitator 4 always being in an optimal agitation position, achieves extremely precise and continuous adjustment of the discharge gap size (i.e., the discharge flow rate).

[0041] like Figure 2 and Figure 3 As shown, in this embodiment, the stirring component 4 includes a stirring blade 41 and a connecting piece 42. One end of the stirring blade 41 is detachably mounted on the sleeve 3 via the connecting piece 42, and the bottom of the other end of the stirring blade 41 is positioned near the discharge port 11 to ensure smooth material discharge from the discharge port 11 during rotation. By detachably connecting the stirring blade 41 to the sleeve 3 via the connecting piece 42, it is easy to replace the stirring blade 41, greatly reducing maintenance costs. Furthermore, stirring blades 41 of different sizes and materials can be used for materials of different viscosities and properties, greatly improving the applicability of the device. Positioning the stirring blade 41 close to the discharge port 11 effectively prevents blockage of the discharge port 11 and significantly improves the uniformity of the material at the discharge port 11.

[0042] like Figures 1 to 3As shown, in this embodiment, a rotary lifting drive mechanism is also provided. The rotary lifting drive mechanism is connected to the top end of the plug rod 2 to drive the plug rod 2 to perform lifting or rotating movements. By connecting the rotary lifting drive mechanism to the top end of the plug rod 2 to drive the plug rod 2 to perform lifting or rotating movements, the lifting height of the plug rod 2 can be precisely controlled, thereby precisely controlling the annular gap between the conical plug 21 and the discharge port 11, and realizing stepless and precise adjustment of the material flow rate.

[0043] In this embodiment, the rotary lifting drive mechanism includes a servo motor for driving the lifting of the plug rod 2 and a stepper motor for driving the rotation of the plug rod 2. The servo motor used in this embodiment is a 42AIM10 servo motor from Shidai Chaoqun, and the stepper motor is an STP-43D2119 stepper motor from Rongmai Motors. The servo motor offers the advantage of precise flow control and rapid start-stop. The stepper motor provides sufficient torque, making it ideal for applications like stirring that require continuous and stable speeds. It can operate stably at a fixed speed, ensuring consistent stirring results. like Figure 2 and Figure 3 As shown, in this embodiment, the sleeve 3 is rotatably mounted on the cylinder 1 via two bearing seats 32 (of course, multiple bearing seats 32 can be provided in other embodiments). A protruding limiting block 22 is provided at the end of the plug rod 2 extending upwards beyond the sleeve 3. A reset elastic element 6 (including a coil spring or rubber column, etc.) is fitted between the limiting block 22 and the top of the sleeve 3 on the plug rod 2 to reset the plug rod 2 during its lifting and lowering movement. The bearing seats 32 significantly improve the rotational stability of the sleeve 3 and allow it to withstand radial force when the stirring element 4 rotates, preventing deformation of the sleeve 3. Furthermore, by setting a protruding limiting block 22 at the end of the plug rod 2 extending upward beyond the sleeve 3, and setting a reset elastic element 6 on the plug rod 2 between the limiting block 22 and the top of the sleeve 3, when the servo motor stops rising, the tapered plug 21 of the plug rod 2 is pressed against the discharge port 11 by the elastic force under the action of the reset elastic element 6, ensuring that the sealing force is consistent each time it is closed, thereby ensuring the repeatability of the closure and the reliability of the seal, and avoiding material leakage. On the other hand, the reset elastic element 6 plays a buffering role, reducing the wear of the sealing surface and extending the service life of the device.

[0044] like Figures 1 to 3As shown, in this embodiment, the top of the cylinder 1 is provided with a lid 12, on which a feed port 13 and a drive port 14 are opened. One end of the plug rod 2 extends from the drive port 14 to facilitate connection with the drive mechanism. By providing the lid 12, the cylinder can be disassembled and assembled, greatly reducing the difficulty of maintenance and improving maintenance efficiency. By providing the drive port 14 and having one end of the plug rod 2 extend from the drive port 14 to connect with the drive mechanism, the vibration of the drive mechanism running inside the cylinder 1 is prevented from causing unstable connections between components.

[0045] like Figure 2 and Figure 3 As shown, in this embodiment, an installation cylinder 15 is connected to the barrel cover 12 below the drive port 14, and the sleeve 3 is rotatably installed inside the installation cylinder 15. A hopper 16 is formed inside the cylinder 1 on one side of the installation cylinder 15, and the hopper 16 is connected to the discharge port 11 and the inlet port 13 respectively. By setting the installation cylinder 15 to isolate the material from the sleeve 3, the lubricating oil in the sleeve 3 is prevented from contaminating the material, and the material is also prevented from entering between the sleeve 3 and the blocking rod 2 and affecting the independent lifting and lowering movement of the blocking rod 2, thereby further improving the reliability of the device.

[0046] Example 2 The other parts of this embodiment are the same as those in Embodiment 1, except that the linkage limiting structure in this embodiment includes a meshing toothed part and a toothed groove part. The toothed part and the toothed groove part are respectively provided on the contact surface of the plug rod 2 and the sleeve 3 (in this embodiment, the toothed part is arranged in a circle around the circumference of the plug rod 2, and the toothed groove part is arranged in a circle around the inner wall of the sleeve 3. In other embodiments, the toothed part can also be arranged in a circle around the inner wall of the sleeve 3, and the toothed groove part can be arranged in a circle around the circumference of the plug rod 2. Furthermore, the toothed part and the toothed groove part can also be only a small section, all of which are within the protection scope of this utility model). This is used to allow the plug rod 2 to rise and fall independently along the axial direction relative to the sleeve 3, or to drive the sleeve 3 to rotate synchronously when the plug rod 2 rotates. By setting the toothed part and the toothed groove part, it can withstand greater rotational resistance, so it can be equipped with larger and more effective stirring blades 41 for stirring materials with extremely high viscosity, and avoid single-point stress concentration, greatly improving the fatigue resistance and wear resistance of the barrel and extending its service life.

[0047] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A high-precision sample dispensing cylinder, comprising a cylinder body (1) and a dispensing mechanism disposed within the cylinder body (1), characterized in that: The discharge mechanism includes a plug rod (2) and a sleeve (3); one end of the plug rod (2) is inserted into the discharge port (11) of the cylinder (1) to open or close the discharge port (11), and the other end of the plug rod (2) is connected to the drive mechanism to drive the plug rod (2) to rise or rotate; the sleeve (3) is sleeved outside the plug rod (2), and the sleeve (3) is provided with a stirring element (4) facing the discharge port (11); a linkage limiting structure is provided between the plug rod (2) and the sleeve (3) to allow the plug rod (2) to rise and fall independently relative to the sleeve (3) to open the discharge port (11), and to make the rotating plug rod (2) drive the sleeve (3) and the stirring element (4) to rotate together during discharge.

2. The high-precision sample feeding cylinder according to claim 1, characterized in that: The linkage limiting structure includes a vertical limiting groove (31) and a limiting bolt (5). The vertical limiting groove (31) is vertically opened on the sleeve (3). The limiting bolt (5) is movably inserted into the vertical limiting groove (31) and fixedly connected to the blocking rod (2).

3. The high-precision sample feeding cylinder according to claim 1, characterized in that: The linkage limiting structure includes a meshing toothed part and a toothed groove part; the toothed part and the toothed groove part are respectively provided on the contact surface of the plug rod (2) and the sleeve (3), which are used to enable the plug rod (2) to rise and fall independently along the axial direction relative to the sleeve (3), or to drive the sleeve (3) to rotate synchronously when the plug rod (2) rotates.

4. The high-precision sample feeding cylinder according to claim 1, characterized in that: The bottom end of the plug rod (2) is provided with a conical plug (21) that matches the discharge port (11). When discharging, the plug rod (2) drives the conical plug (21) to rise and fall within the discharge port (11) to control the discharge flow rate.

5. The high-precision sample feeding cylinder according to claim 1, characterized in that: The stirring component (4) includes stirring blades (41) and connecting piece (42). One end of the stirring blade (41) is detachably mounted on the sleeve (3) via the connecting piece (42). The bottom of the other end of the stirring blade (41) is set near the discharge port (11) to ensure smooth discharge at the discharge port (11) when rotating.

6. The high-precision sample feeding cylinder according to claim 1, characterized in that: It is also provided with a rotary lifting drive mechanism, which is connected to the top end of the stop rod (2) to drive the stop rod (2) to perform lifting or rotating movements.

7. The high-precision sample feeding cylinder according to claim 6, characterized in that: The rotary lifting drive mechanism includes a servo motor for driving the stop rod (2) to lift and lower, and a stepper motor for driving the stop rod (2) to rotate.

8. The high-precision sample feeding cylinder according to claim 1, characterized in that: The sleeve (3) is rotatably mounted on the cylinder (1) via at least two bearing seats (32). The end of the plug rod (2) extending upward out of the sleeve (3) is provided with a protruding limiting block (22). A reset elastic element (6) is fitted on the plug rod (2) between the limiting block (22) and the top of the sleeve (3) so that the plug rod (2) can be reset when it moves up and down.

9. The high-precision sample feeding cylinder according to claim 1, characterized in that: The top of the cylinder (1) is provided with a barrel cover (12), and the barrel cover (12) has a feed port (13) and a drive port (14). One end of the plug rod (2) extends from the drive port (14) to facilitate connection with the drive mechanism.

10. The high-precision sample feeding cylinder according to claim 9, characterized in that: An installation cylinder (15) is connected to the barrel cover (12) below the drive port (14), and the sleeve (3) is rotatably installed inside the installation cylinder (15); a hopper (16) is formed inside the cylinder (1) on one side of the installation cylinder (15), and the hopper (16) is connected to the discharge port (11) and the inlet port (13) respectively.

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