A centrifuge sampling device

Abstract

This utility model relates to the field of centrifuge equipment technology, and in particular to a centrifuge sampling device. The centrifuge includes a feeding pipe, and the sampling device is disposed on the feeding pipe. The sampling device includes: a sampling tube disposed on the feeding pipe and communicating with the inside of the feeding pipe; a sampler, which includes a sampling cylinder, a sampling component, and a driving component. The sampling cylinder is connected to the feeding pipe, the sampling component is disposed inside the sampling cylinder, and the driving component is disposed on the sampling tube and used to realize the movement of the sampling component inside the sampling cylinder. A sampling port is opened on the sampling cylinder. The sampling tube and the feeding pipe of the sampling device are fixedly disposed and communicated to form a closed sampling space. The sampling component moves back and forth in the sampling space to realize the pressure change in the sampling space, and delivers the sample to the sampling port through physical movement contact, thereby realizing closed sampling, completely avoiding the pollution problems caused by traditional sampling processes, and realizing pollution-free and rapid sampling.

Description

Technical Field

[0001] This utility model relates to the field of centrifuge equipment technology, and in particular to a centrifuge sampling device. Background Technology

[0002] In the lithium carbonate production process, centrifuges have a significant design flaw—they lack a dedicated sampling port. This makes sample collection extremely inconvenient, requiring sampling to be performed through a manhole in the hopper after the centrifugation process is complete.

[0003] Manholes are typically located high up in the equipment, requiring operators to use climbing tools to reach the sampling position. This not only increases the complexity and labor intensity of the operation but also poses certain safety hazards, such as the risk of slipping and falling. Furthermore, sampling through the hopper manhole presents a serious problem: the risk of introducing foreign matter. During sampling, operators need to open the manhole cover, allowing direct contact between the external environment and the hopper's interior. Dust, impurities in the air, as well as tools and clothing fibers carried by the operators, can all enter the hopper and contaminate the sample. These foreign objects not only affect the quality and representativeness of the sample but may also lead to deviations in subsequent analytical results, thus impacting quality control and process optimization throughout the entire production process. Utility Model Content

[0004] The main purpose of this invention is to provide a centrifuge sampling device, which aims to solve the problem of foreign matter contamination that easily occurs when centrifuges take samples in the prior art.

[0005] To achieve the above objectives, this utility model provides a centrifuge sampling device, wherein the centrifuge includes a feed pipe, and the sampling device is disposed on the feed pipe. The sampling device includes:

[0006] A sampling tube is provided on the feeding tube and communicates with the inside of the feeding tube;

[0007] A sampler includes a sampling cylinder, a sampling component, and a driving component. The sampling cylinder is connected to the feed pipe. The sampling component is disposed inside the sampling cylinder. The driving component is disposed on the sampling pipe and is used to realize the movement of the sampling component inside the sampling cylinder. A sampling port is provided on the sampling cylinder.

[0008] Optionally, the sampling component includes two parallel sampling plates, the output end of the driving component is provided with a sampling rod, the two sampling plates are disposed on the sampling rod, and the sampling port is opened between the two sampling plates.

[0009] Optionally, the area between the two sampling plates forms a sampling cavity within the sampling tube, and the sampling cavity reciprocates at the sampling port to transport the sample in the feed tube to the sampling port.

[0010] Optionally, the drive assembly includes a gas spring or a hydraulic rod.

[0011] Optionally, the sampling port is equipped with a valve, and a sampling bucket is provided below the sampling port.

[0012] Optionally, a gasket is provided on the outer periphery of the sampling piece, and the sampling piece with the gasket abuts against the inner diameter of the sampling cylinder.

[0013] Optionally, the sampling rod has a spiral assembly placed between the sampling chambers, and the spiral assembly rotates relative to the sampling chambers when the sampling port changes position.

[0014] Optionally, the spiral assembly includes two spiral seats disposed on the sampling rod, and a plurality of spiral blades are spirally disposed between the two spiral seats.

[0015] Optionally, the drive assembly includes a drive cylinder connected to the sampling cylinder. The drive cylinder has an internal thread, and the end of the sampling rod away from the feeding cylinder is a screw that matches the thread. The screw is connected to the output end of the gas spring or hydraulic rod.

[0016] Optionally, the sampling tube is inclined, and the angle between the axes of the sampling tube and the feeding tube is in the range of 50° to 70°.

[0017] This invention proposes a centrifuge sampling device. A sampling device is installed on the feed pipe of the centrifuge. The sampling pipe of the sampling device is fixedly installed and connected to the feed pipe to form a closed sampling space. A sampling component is also installed in the sampling space. The sampling component moves back and forth in the sampling space to realize the pressure change in the sampling space. The sample is transported to the sampling port through physical movement and contact, thereby realizing closed sampling. This completely avoids the pollution problems caused by traditional sampling processes and realizes pollution-free and rapid sampling. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the sampling device in an embodiment of the present invention;

[0020] Figure 3 This is another internal structure diagram of the sampling device in an embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram of the spiral assembly in an embodiment of the present invention;

[0022] Figure label:

[0023] 1-Feeding pipe, 2-Sampling device, 3-Sampling pipe, 4-Sampler, 5-Sampling port, 6-Sampling bucket;

[0024] 41-Sampling cylinder, 42-Sampling assembly, 43-Drive assembly, 44-Spiral assembly;

[0025] 421 - Sample piece;

[0026] 431 - Sampling rod;

[0027] 441 - Helical seat, 442 - Helical plate.

[0028] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0033] Example:

[0034] Please refer to the attached document as well. Figures 1 to 4 This embodiment proposes a centrifuge sampling device 2. The centrifuge includes a feed pipe 1, and the sampling device 2 is disposed on the feed pipe 1. The sampling device 2 includes:

[0035] Sampling tube 3 is disposed on the feeding tube 1 and communicates with the inside of the feeding tube 1;

[0036] The sampler 4 includes a sampling cylinder 41, a sampling component 42, and a driving component 43. The sampling cylinder 41 is connected to the feed pipe 1. The sampling component 42 is disposed inside the sampling cylinder 41. The driving component 43 is disposed on the sampling pipe 3 and is used to realize the movement of the sampling component 42 inside the sampling cylinder 41. The sampling cylinder 41 is provided with a sampling port 5.

[0037] It should be noted that existing centrifuges do not have a dedicated sampling port 5, which makes sample sampling extremely inconvenient. Samples must be taken through the manhole of the hopper after the centrifugation process is completed. However, sampling through the manhole poses a significant contamination problem. Based on the above problems, this embodiment proposes a centrifuge sampling device 2. A sampling device 2 is installed on the centrifuge's discharge pipe 1, and the sampling pipe 3 of the sampling device 2 is fixedly installed and connected to the discharge pipe 1 to form a closed sampling space. A sampling component 42 is also installed in this sampling space. The sampling component 42 moves back and forth in the sampling space to change the pressure in the sampling space and physically moves to transport the sample to the sampling port 5, thereby achieving closed sampling and completely avoiding the contamination problem caused by traditional sampling processes, realizing pollution-free and rapid sampling.

[0038] More specifically, the feed pipe 1 integrates a single, sealed sampling system consisting of a sampling tube 3 and a sampler 4. The sampling tube 3 is fixedly connected to the feed pipe 1 and internally interconnected, forming an initial channel directly connected to the material flow channel. The sampler 4 further includes a sampling cylinder 41, a sampling component 42, and a drive component 43. The sampling cylinder 41, as the core container, is sealed to the feed pipe 1 and internally houses the movable sampling component 42. The drive component 43 precisely controls the reciprocating motion trajectory of the sampling component 42 along the axial direction of the sampling cylinder 41. The working principle of this device profoundly reflects the synergistic effect of physical isolation and mechanical transmission: when the centrifuge is running and the material flows through the feed pipe 1, the drive component 43 starts and pushes the sampling component 42 to move along the sampling cylinder 41 in the direction of material flow. During this process, the sampling component 42 acts like a dynamic piston. Its outer edge forms an interference fit with the inner wall of the sampling cylinder 41 through a precisely designed gasket, ensuring that the inside of the sampling cylinder 41 remains completely sealed throughout the entire movement, completely isolating it from the external environment. As the sampling component 42 advances deeper into the material, the material to be sampled in the feed pipe 1 naturally fills the cavity formed by the specific structure of the sampling component 42 under the action of gravity and fluid. Subsequently, the drive component 43 performs a return motion, causing the sampling component 42 to move in the opposite direction with the intercepted material sample, leaving the main channel area and returning to the predetermined position of the sampling cylinder 41. At this time, the sampling port 5, which is pre-opened on the wall of the sampling cylinder 41, opens in a timely manner under program control, and the material carried in the sampling cavity falls precisely into the receiving sampling bucket 6 below under the action of gravity or auxiliary pressure difference.

[0039] Based on the above process, the source of contamination introduced by opening the cover during traditional manhole sampling is fundamentally eliminated, greatly improving the purity of the sample and the accuracy of the test results, especially meeting the quality control requirements of high-purity materials such as lithium carbonate; transforming high-risk high-altitude climbing sampling into an automated operation that can be completed on the ground or a safe platform, significantly reducing the probability of safety accidents such as slips and falls, and improving working conditions; through the programmed control of the drive component 43 and the intelligent valve coordination of the sampling port 5, rapid and batch sampling is achieved, greatly improving sampling efficiency and reducing downtime; sampling directly in the dynamic flow of the feed pipe 1 reflects the real-time process status better than static silo sampling, and the sample representativeness is stronger; the modular design makes the device easy to install and maintain, and the sealed structure simultaneously reduces material volatilization loss and environmental pollution.

[0040] In this embodiment, the sampling component 42 includes two parallel sampling plates 421, and the output end of the driving component 43 is provided with a sampling rod 431. The two sampling plates 421 are disposed on the sampling rod 431, and the sampling port 5 is opened between the two sampling plates 421.

[0041] In this embodiment, the area between the two sampling pieces 421 forms a sampling cavity in the sampling tube 41. The sampling cavity moves back and forth at the sampling port 5 to transport the sample in the feed tube 1 to the sampling port 5.

[0042] Based on the above structure, the two sampling pieces 421 are fixedly mounted on the sampling rod 431. The sampling rod 431 is driven to reciprocate along the axis of the sampling cylinder 41. It can be understood that the sampling pieces 421 will first move into the feed tube 1 as the sampling rod 431 moves. At this time, the sample will move between the two sampling pieces 421 under its own gravity. Subsequently, the sampling pieces 421 move away from the feed tube 1 through the sampling rod 431, which is the return process of the drive component 43. The sample between the two sampling pieces 421 is pulled back to the sampling cylinder 41, and finally falls to the sampling port 5 to complete the sampling process.

[0043] More specifically, the sampling component 42 is embodied in two parallel rigid sampling plates 421, which are vertically fixed to the sampling rod 431 of the drive component 43 to form a rigid frame. Simultaneously, the sampling port 5 is located on the cylindrical wall between the two sampling plates 421, creating a strict geometric correspondence between the physical space of the sampling port 5 and the core working area of ​​the sampling component 42. When the drive component 43 pushes the sampling rod 431 to move centripetally, the two parallel sampling plates 421 are simultaneously inserted into the material flow of the feed pipe 1. At this time, the area between the two plates naturally forms a cylindrical "sampling cavity" within the sampling cylinder 41. This cavity, with the interference fit between the sealing gasket on the outer edge of the sampling plate 421 and the inner wall of the sampling cylinder 41, becomes a mobile, sealed container completely isolated from the external environment.

[0044] Understandably, the rigid cavity formed by the parallel sampling plates 421 ensures the physical integrity of the sample during the interception and transportation process, especially for fragile crystalline materials such as lithium carbonate, avoiding particle size distribution distortion caused by compression and breakage; the geometric matching design of the sampling port 5 and the sampling cavity realizes point-to-point direct discharge from the cavity to the port, significantly reducing material residue, while completely avoiding material splashing contamination that may occur with traditional side openings.

[0045] In this embodiment, the drive component 43 includes a gas spring or a hydraulic rod. It is understood that the pure fluid drive of the above-mentioned preferred structure completely eliminates the risk of electrical sparks, meets the highest level requirements of ATEX explosion-proof certification, and solves the safety access problem for sampling equipment in high-risk environments; the constant force output characteristic of the gas spring / hydraulic rod reduces the fluctuation rate of single sampling, significantly improving the comparability of test data; furthermore, the reset process of the above two preferred structures can utilize gravitational potential energy conversion, with energy consumption only 1 / 10 of that of electric drive, and no heat dissipation requirement, making it particularly suitable for high-temperature centrifuge stations.

[0046] In this embodiment, the sampling port 5 is equipped with a valve, and a sampling bucket 6 is disposed below the sampling port 5. The valve increases the overall sealing performance of the sampling device 2.

[0047] In some embodiments, the valve is preferably a CNC solenoid valve, which opens and closes intermittently as the drive assembly 43 moves.

[0048] In this embodiment, a gasket is provided on the outer periphery of the sampling piece 421, and the sampling piece 421 with the gasket abuts against the inner diameter of the sampling cylinder 41.

[0049] In some embodiments, the gasket is preferably a dynamic seal composed of three functional materials: the core layer is a high-elasticity nickel-titanium alloy skeleton that provides constant radial preload; the middle layer is a carbon fiber woven mesh impregnated with molybdenum disulfide, which has both thermal conductivity and impact resistance; and the surface layer is a 0.5 mm thick modified polytetrafluoroethylene wear-resistant coating.

[0050] In this embodiment, the sampling rod 431 has a spiral assembly 44 positioned between the sampling chambers. When the sampling chambers change position at the sampling port 5, the spiral assembly 44 rotates relative to them. It is understood that since the sample composition within the feed tube 1 is already fixed, a spiral assembly 44 is added within the sampling chambers to achieve more uniform sampling, and a power assembly is selectively configured to control the rotation of the spiral assembly 44. Specifically, when the drive assembly 43 pushes the sampling rod 431 to move centripetally, the sampling chamber carries the material deeper into the feed tube 1. At this time, the material flowing at high speed through the spiral assembly 44 generates positive fluid resistance, pushing the spiral blades 442 to rotate around the axis of the sampling rod 431. When the sampling rod 431 retracts, the material flowing in the opposite direction drives the spiral blades 442 to rotate in the opposite direction. This bidirectional self-driven rotation mechanism makes the spiral assembly 44 a dynamic mixing core.

[0051] In some embodiments, the spiral assembly 44 includes two spiral seats 441 disposed on the sampling rod 431, with a plurality of spiral blades 442 spirally disposed between the two spiral seats 441. Specifically, two high-precision spiral seats 441 are fixed to both ends of the sampling cavity section of the sampling rod 431 with an interference fit, forming a rigid torque transmission base; between the two seats, three or more sets of independent spiral blades 442 are distributed in a gradient, each set of spiral blades 442 adopts an asymmetric airfoil design with variable pitch and variable inclination angle, and forms an ultra-low resistance rotating pair with the spiral seats 441 through bearings. Preferably, there is an axial gap between adjacent spiral blades 442, and this gap area generates periodic pressure oscillations during rotation: when the wide-pitch blades push the material to form a high-pressure pulse, the narrow-pitch blades are exactly in the negative pressure phase, and the resulting pumping effect causes the material to flow through at high speed in the axial gap, completely eliminating the mixing dead zone at the end of the cavity, and further increasing the sampling volume and sampling efficiency.

[0052] In this embodiment, the driving assembly 43 includes a driving cylinder connected to the sampling cylinder 41. The driving cylinder has an internal thread, and the end of the sampling rod 431 away from the feeding cylinder is a screw that matches the thread. The screw is connected to the output end of the gas spring or hydraulic rod.

[0053] Understandably, the drive cylinder and the sampling cylinder 41 are connected in series on the same axis. The inner wall of the drive cylinder is precisely machined with a multi-start trapezoidal internal thread, and the extension section of the sampling rod 431 is modified into a high-strength screw that meshes with it. The end of the screw is rigidly connected to the piston rod of the gas spring / hydraulic rod through a floating coupling, thus constructing a helical reciprocating transmission chain.

[0054] In some embodiments, the sampling tube 3 is inclined, and the angle between the axes of the sampling tube 3 and the feeding tube 1 is in the range of 50° to 70°. It can be understood that the inclined arrangement of the sampling tube 3 can effectively prevent the sample from entering the sampling assembly 42 through the sampling tube 3 during the normal feeding process of the feeding tube 1.

[0055] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A centrifuge sampling device, characterized by, The centrifuge includes a feed pipe, and the sampling device is disposed on the feed pipe. The sampling device includes: A sampling tube is provided on the feeding tube and communicates with the inside of the feeding tube; A sampler includes a sampling cylinder, a sampling component, and a driving component. The sampling cylinder is connected to the feed pipe. The sampling component is disposed inside the sampling cylinder. The driving component is disposed on the sampling pipe and is used to realize the movement of the sampling component inside the sampling cylinder. A sampling port is provided on the sampling cylinder.

2. A centrifuge sampling device as claimed in claim 1, wherein, The sampling component includes two parallel sampling plates, and the output end of the driving component is provided with a sampling rod. The two sampling plates are disposed on the sampling rod, and the sampling port is opened between the two sampling plates.

3. A centrifuge sampling device as claimed in claim 2, wherein, The area between the two sampling plates forms a sampling cavity inside the sampling tube. The sampling cavity moves back and forth at the sampling port to transport the sample in the feed tube to the sampling port.

4. A centrifuge sampling device as defined in claim 1, wherein, The drive assembly includes a gas spring or a hydraulic rod.

5. A centrifuge sampling device as defined in claim 1, wherein, The sampling port is equipped with a valve, and a sampling bucket is located below the sampling port.

6. A centrifuge sampling device as defined in claim 2, wherein, A gasket is provided on the outer periphery of the sampling piece, and the sampling piece with the gasket abuts against the inner diameter of the sampling cylinder.

7. A centrifuge sampling device as claimed in claim 3, wherein, The sampling rod has a spiral assembly placed between the sampling chambers. When the sampling chambers change position at the sampling port, the spiral assembly rotates relative to them.

8. A centrifuge sampling device as claimed in claim 7, wherein, The spiral assembly includes two spiral seats disposed on the sampling rod, and a plurality of spiral blades are spirally disposed between the two spiral seats.

9. A centrifuge sampling device as described in claim 4, characterized in that, The drive assembly includes a drive cylinder connected to the sampling cylinder. The drive cylinder has an internal thread. The end of the sampling rod away from the feeding cylinder is a screw that matches the thread. The screw is connected to the output end of the gas spring or hydraulic rod.

10. A centrifuge sampling device as described in claim 1, characterized in that, The sampling tube is inclined, and the angle between the axes of the sampling tube and the feeding tube is in the range of 50° to 70°.

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