Feeding device for sample preparation

Abstract

The utility model discloses a sample preparation feeding device, and belongs to the technical field of coal analysis. The sample preparation feeding device comprises a conveying main body, a feeding driving unit and a discharging adjusting unit, a conveying pipeline of the conveying main body extends in the first direction, a feeding port is formed in the upper pipe wall of the head end of the conveying pipeline, and a discharging port is formed in the lower pipe wall of the tail end of the conveying pipeline; the feeding driving unit is used for pushing materials in the conveying pipeline to be conveyed in the first direction, the feeding driving unit comprises a rotating rod and a spiral blade, the rotating rod is rotationally arranged in the conveying pipeline, the spiral blade is arranged on the rotating rod, and the screw pitch of the spiral blade is gradually increased in the direction opposite to the first direction; and the discharging adjusting unit comprises a baffle, and the baffle is arranged at the discharging port and used for adjusting the discharging amount of the materials at the discharging port. According to the utility model, the volatility of the material discharging amount can be reduced, and the pipeline is prevented from being blocked.

Description

Technical Field

[0001] This utility model relates to the field of coal analysis technology, and in particular to a sample preparation and feeding device. Background Technology

[0002] The entire process of sampling, sample preparation, and testing of materials (such as bulk materials like ore and coal) involves several key steps, including crushing, grinding, and fractionation. These steps place stringent requirements on the precision of sample feed control. As the core component of the sample preparation system, the feeding device plays a crucial role in accurately controlling the sample feed rate, and its performance directly determines the uniformity of the sample preparation process, processing efficiency, and overall equipment reliability.

[0003] Traditional feeding devices typically consist of four core components: a feeding mechanism, a feeding pipe, a piston pusher, and a drive mechanism. The feeding mechanism connects to the feeding pipe via a conduit, forming the initial channel for material transfer. One end of the piston pusher is rigidly connected to the drive mechanism, while the other end extends into the feeding pipe. The drive mechanism uses mechanical transmission or a hydraulic / pneumatic system to drive the piston pusher in a reciprocating linear motion within the feeding pipe. The device operates based on the periodic displacement of the piston pusher within the feeding pipe. When the piston pusher moves towards one end of the feeding pipe, a negative pressure environment is created, drawing material from the feeding mechanism into the feeding pipe. When the piston pusher moves in the opposite direction, positive pressure pushes the material out. Furthermore, the reciprocating motion of the piston pusher effectively removes residual material adhering to the inner wall of the feeding pipe, preventing material accumulation.

[0004] However, the existing technical solution suffers from a drawback: it relies on an intermittent piston-driven mechanism for material feeding. This operating mode results in significant periodic fluctuations in the material output, which not only reduces the stability of the sample preparation process but also increases the risk of blockage in the delivery pipeline. Specifically, when the piston rod is in the return phase, the material feed rate decreases sharply or even stops, while when the piston rod advances again, the material output rate may suddenly increase. This drastic change in output rate poses a challenge to the stable operation of subsequent sample preparation equipment. Furthermore, intermittent feeding easily leads to material accumulation in the pipeline, especially when the material is highly viscous or has uneven particle size, which can easily cause pipeline blockage and thus affect the continuity and reliability of the entire sample preparation system.

[0005] This section provides background information related to this application, which is not necessarily prior art. Utility Model Content

[0006] The purpose of this invention is to provide a sample feeding device that can reduce the fluctuation of material output and prevent pipeline blockage.

[0007] To achieve the above objectives, the following technical solution is provided:

[0008] Sample preparation and feeding device, including:

[0009] The conveying body includes a conveying pipe that extends along a first direction. The upper pipe wall at the beginning of the conveying pipe is provided with a feed inlet, and the lower pipe wall at the end of the conveying pipe is provided with a discharge outlet.

[0010] A feed drive unit is used to push the material in the conveying pipe to be conveyed along the first direction. The feed drive unit includes a rotating rod and a spiral blade. The rotating rod is rotatably disposed in the conveying pipe, and the spiral blade is disposed on the rotating rod. The pitch of the spiral blade gradually increases in the opposite direction to the first direction.

[0011] The discharge adjustment unit includes a baffle plate disposed at the discharge port, and the baffle plate is used to adjust the discharge amount of material at the discharge port.

[0012] As an optional solution for the sample feeding device, the conveying body further includes a first sealing cover and a second sealing cover, the first sealing cover and the second sealing cover being respectively sealed to both ends of the conveying pipe, and both ends of the rotating rod being rotatably connected to the first sealing cover and the second sealing cover respectively.

[0013] As an optional solution for the sample preparation and feeding device, the feed drive unit further includes:

[0014] A baffle plate is disposed at one end of the rotating rod near the second sealing cover, and the outer diameter of the baffle plate is not greater than the inner diameter of the conveying pipe;

[0015] A stirring blade, a plurality of the stirring blades are circumferentially spaced on the rotating rod and located between the spiral blade and the baffle plate, and a scraper is provided at the end of the stirring blade.

[0016] As an optional solution for the sample preparation and feeding device, the conveying body further includes a feeding hopper, which is disposed on the conveying pipeline and connected to the inlet, and the inner cavity of the feeding hopper gradually increases along the second direction.

[0017] As an optional solution for the sample preparation and feeding device, the feeding drive unit further includes a drive motor, the shaft of which is connected to the rotating rod for transmission, and the drive motor is used to drive the rotating rod to rotate.

[0018] As an optional solution for the sample preparation and feeding device, the conveying pipeline includes multiple split-type pipelines, each of which has a flange at its port, and fasteners are installed on the flanges of two adjacent split-type pipelines.

[0019] As an optional solution for the sample preparation and feeding device, the sample preparation and feeding device further includes a discharge unit, which includes a discharge pipe and a switch valve installed in the discharge pipe. The middle section of the conveying pipe is provided with a discharge port, and the discharge pipe is installed on the conveying pipe and communicates with the discharge port.

[0020] As an optional solution for the sample preparation and feeding device, the discharge adjustment unit further includes a discharge pipe, which is disposed on the conveying pipe and communicates with the discharge port. The baffle is slidably disposed at the opening of the discharge pipe and is used to adjust the size of the opening of the discharge pipe. The area of ​​the baffle is not less than the cross-sectional area of ​​the opening of the discharge pipe.

[0021] As an optional solution for the sample preparation and feeding device, the discharge adjustment unit further includes:

[0022] A linear drive module is used to drive the baffle to move along the first direction, and the linear drive module is connected to the baffle in a transmission connection.

[0023] As an optional solution for the sample feeding device, the discharge adjustment unit further includes a discharge pipe, which is disposed on the conveying pipe and connected to the discharge port. The baffle is rotatably disposed inside the discharge pipe and is used to adjust the size of the discharge pipe. The area of ​​the baffle is not greater than the cross-sectional area of ​​the discharge pipe.

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0025] The sample feeding device provided by this utility model has an inlet and an outlet on the conveying pipe of the conveying body. The material to be conveyed enters the conveying pipe through the inlet and exits through the outlet. The spiral blades of the feeding drive unit are fixed to a rotating rod. The material is conveyed along the conveying pipe by the rotating rod driving the spiral blades to rotate. Since the pitch of the spiral blades gradually increases in the opposite direction to the first direction (i.e., the pitch of the spiral blades corresponding to the inlet is larger), it prevents material accumulation; the pitch of the spiral blades corresponding to the outlet is smaller, which helps to pressurize and convey the material. Furthermore, the rotating rod can scrape off the material adhering to the inner wall of the conveying pipe when rotating in the opposite direction. A baffle of the discharge adjustment unit is installed at the outlet of the conveying pipe. By adjusting the position of the baffle, the discharge rate of the material can be controlled, reducing fluctuations in the discharge rate, preventing pipe blockage, and allowing the discharge rate to be adjusted according to different material characteristics. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model 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 the content of the embodiments of this utility model and these drawings without creative effort.

[0027] Figure 1 This is an assembly diagram of the sample feeding device in Embodiment 1 of this utility model;

[0028] Figure 2 This is a schematic diagram of the conveying body in Embodiment 1 of this utility model;

[0029] Figure 3 This is a schematic diagram of the feed drive unit in Embodiment 1 of this utility model;

[0030] Figure 4 This is a schematic diagram of the sample preparation and feeding device in Embodiment 2 of this utility model.

[0031] Figure label:

[0032] 1. Conveying body; 2. Feed drive unit; 3. Discharge adjustment unit; 4. Discharge unit;

[0033] 11. Conveying pipe; 111. Inlet; 112. Outlet; 113. Discharge port; 12. First sealing cover; 13. Second sealing cover; 14. Feed hopper;

[0034] 21. Rotating rod; 22. Spiral blade; 23. Baffle plate; 24. Agitator blade; 25. Drive motor;

[0035] 31. Baffle; 32. Discharge pipe; 33. Linear drive module;

[0036] 41. Discharge pipe; 42. Switch valve. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for 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 utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0039] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0041] To reduce fluctuations in material output and prevent pipe blockage, this embodiment provides a sample feeding device, which is described below in conjunction with... Figures 1 to 4 The specific content of this embodiment will be described in detail. It should be noted that the first direction mentioned in this embodiment is... Figure 1 The X direction in this embodiment, and the second direction mentioned in this embodiment are... Figure 1 in the Y direction.

[0042] Example 1

[0043] like Figures 1 to 3As shown, the sample feeding device in this embodiment includes a conveying body 1, a feeding drive unit 2, and a discharge adjustment unit 3. The conveying body 1 includes a conveying pipe 11, which extends along a first direction. The upper pipe wall at the beginning of the conveying pipe 11 is provided with a feed inlet 111, and the lower pipe wall at the end of the conveying pipe 11 is provided with a discharge outlet 112. The feeding drive unit 2 is used to push the material in the conveying pipe 11 to be conveyed along the first direction. The feeding drive unit 2 includes a rotating rod 21 and a spiral blade 22. The rotating rod 21 is rotatably disposed in the conveying pipe 11, and the spiral blade 22 is disposed on the rotating rod 21. The pitch of the spiral blade 22 gradually increases in the opposite direction to the first direction. The discharge adjustment unit 3 includes a baffle 31, which is disposed at the discharge outlet 112. The baffle 31 is used to adjust the discharge amount of material at the discharge outlet 112.

[0044] In summary, the sample feeding device provided by this utility model has an inlet 111 on the upper wall of the conveying pipe 11 of the conveying body 1, which provides a convenient channel for materials to enter the conveying pipe 11. The pitch of the spiral blade 22 in the feeding drive unit 2 gradually increases in the opposite direction of the first direction. At the corresponding position of the inlet 111, the larger pitch allows the material to enter the conveying pipe 11 easily and quickly, effectively avoiding the problem of material accumulation and blockage at the inlet 111, ensuring smooth feeding, and laying a good foundation for the subsequent conveying process. The rotating rod 21 drives the spiral blade 22 to rotate, pushing the material to be conveyed in the first direction. The structural characteristics of the spiral blade 22 ensure that the material is subjected to a uniform pushing force during the conveying process, enabling it to move stably within the conveying pipe 11. This conveying method not only improves the material conveying efficiency but also ensures the continuity of material conveying, reducing the risk of production interruption and equipment failure caused by unstable material conveying. At the corresponding position of the discharge port 112, the pitch of the spiral blade 22 is relatively small. When the material reaches this position, the pressure on the material gradually increases due to the decrease in pitch, which helps to pressurize and convey the material, ensuring that the material can be smoothly discharged from the discharge port 112. In addition, when the rotating rod 21 rotates in the opposite direction, the spiral blade 22 can scrape off the material adhering to the inner wall of the conveying pipe, preventing the material from accumulating and forming clumps on the inner wall of the pipe over a long period of time, thereby keeping the conveying pipe 11 clean and unobstructed, extending the service life of the equipment, and reducing the maintenance cost of the equipment. The baffle 31 of the discharge adjustment unit 3 is set at the discharge port 112. By adjusting the position of the baffle 31, the discharge amount of material at the discharge port 112 can be precisely controlled. When it is necessary to increase the material discharge amount, the baffle 31 is moved upward to increase the opening area of ​​the discharge port 112; when it is necessary to reduce the material discharge amount, the baffle 31 is moved downward to reduce the opening area of ​​the discharge port 112. This adjustment method is simple and easy to implement, and operators can quickly and accurately adjust the material discharge amount according to actual production needs. By adjusting the material discharge rate through baffle 31, the fluctuation of the material discharge rate can be effectively reduced. During production, a stable material discharge rate is crucial for ensuring product quality and production efficiency. The discharge adjustment unit 3 of this device can avoid production instability caused by excessive or insufficient material discharge, ensuring a stable material output and providing reliable support for subsequent production processes. Precise discharge rate control can also prevent pipe blockage. When the material discharge rate is too high, it can easily lead to material accumulation in the conveying pipe 11, causing blockage. By adjusting baffle 31 and controlling the material discharge rate within a suitable range, smooth material flow within the conveying pipe 11 can be ensured, effectively preventing blockage and reducing equipment downtime and maintenance costs caused by pipe blockage. Precise discharge rate control can also prevent pipe blockage. When the material discharge rate is too high, it can easily lead to material accumulation in the conveying pipe 11, causing blockage.By adjusting the baffle 31, the material discharge rate can be controlled within a suitable range, ensuring smooth flow of material in the conveying pipe 11, effectively preventing blockages, and reducing equipment downtime and maintenance costs caused by pipe blockages.

[0045] Furthermore, the conveying body 1 also includes a first sealing cover 12 and a second sealing cover 13. The first sealing cover 12 and the second sealing cover 13 are respectively sealed to both ends of the conveying pipe 11, and both ends of the rotating rod 21 are rotatably connected to the first sealing cover 12 and the second sealing cover 13. The first sealing cover 12 and the second sealing cover 13 are sealed to both ends of the conveying pipe 11, forming a closed conveying space. During material conveying, this sealing structure can effectively prevent material from leaking out from both ends of the conveying pipe 11. For example, in some industries with extremely strict requirements on material loss, material leakage will not only waste raw materials and increase production costs, but may also pollute the environment. The sealing design of this device can minimize material leakage, ensure that the material can be conveyed according to the predetermined path and output, and improve material utilization and production efficiency. The closed conveying environment can also prevent external impurities from entering the interior of the conveying pipe 11. During material conveying, if external impurities are mixed in, it may have an adverse effect on the quality of the material and reduce the purity and performance of the product. For example, in the food processing industry, the entry of external dust, bacteria and other impurities may contaminate food and endanger consumers' health. The sealed structure of this device provides a pure transport environment for materials, ensuring their quality and safety. The sealed transport pipeline 11 can maintain a relatively stable internal pressure. For materials requiring specific pressure conditions for transport, such as gases or liquids with a certain degree of fluidity, stable transport pressure helps ensure stable transport speed and output. For example, in natural gas transport, stable pressure ensures that natural gas can be delivered to the user at a constant output, meeting the user's normal usage needs. The sealed design of this device guarantees the maintenance of stable transport pressure. The two ends of the rotating rod 21 are rotatably connected to the first sealing cover 12 and the second sealing cover 13, respectively, providing reliable support for the rotating rod 21. During the process of the rotating rod 21 driving the spiral blade 22 to rotate and transport materials, the rotating rod 21 will be subjected to forces such as the resistance of the material and its own gravity. Without stable support, the rotating rod 21 may sway or deviate, causing the spiral blade 22 to rub against the inner wall of the transport pipeline 11, affecting the material transport effect and even damaging the equipment. The sealing cover support structure of this device ensures that the rotating rod 21 remains stable during rotation, improving the reliability of equipment operation. Stable support also reduces wear on the rotating rod 21 and the helical blade 22. When the rotating rod 21 wobbles or deviates, the friction between the helical blade 22 and the inner wall of the conveying pipe 11 intensifies, leading to faster wear on the blade and the inner wall of the pipe. The support structure of this device allows the rotating rod 21 to rotate smoothly, reducing unnecessary friction and thus extending the service life of the rotating rod 21 and the helical blade 22, lowering the maintenance and replacement costs of the equipment. The rotating connection between the rotating rod 21 and the sealing cover also facilitates the installation and maintenance of the equipment.During installation, the two ends of the rotating rod 21 can be first installed onto the first sealing cover 12 and the second sealing cover 13 respectively, and then the sealing cover can be sealed to the conveying pipe 11. The installation process is simple and quick. During equipment maintenance, the rotating rod 21 and the spiral blade 22 can be easily inspected, repaired and replaced simply by opening the sealing cover, which improves the maintainability of the equipment.

[0046] Furthermore, the feed drive unit 2 also includes a baffle plate 23 and stirring blades 24. The baffle plate 23 is located at one end of the rotating rod 21 near the second sealing cover 13, and its outer diameter is no greater than the inner diameter of the conveying pipe 11. Several stirring blades 24 are circumferentially spaced on the rotating rod 21 and located between the spiral blades 22 and the baffle plate 23. A scraper is provided at the end of each stirring blade 24. The baffle plate 23 is located at one end of the rotating rod 21 near the second sealing cover 13, and its outer diameter is no greater than the inner diameter of the conveying pipe 11. This design cleverly forms a material gathering area. During the process of the rotating rod 21 driving the spiral blades 22 to convey materials, the materials move forward continuously within the conveying pipe 11. When they reach the position of the baffle plate 23, the baffle plate 23 can prevent the materials from continuing to diffuse excessively towards the end of the conveying pipe 11, guiding the materials to the vicinity of the discharge port 112. This precise material guidance allows materials to be discharged more concentratedly from the discharge port 112, preventing materials from scattering and accumulating at the end of the conveying pipe 11, thus improving discharge efficiency. The baffle plate 23 also reduces the amount of material remaining at the end of the conveying pipe 11. After material conveying, without the baffle plate 23, some material might remain at the end of the conveying pipe 11, causing waste and potentially mixing with new material during the next conveying, affecting product quality. The baffle plate 23 effectively guides the material to the discharge port 112, reducing the possibility of material residue and ensuring the continuity of the production process and the consistency of product quality. During the rotation of the rotating rod 21, the stirring blades 24 thoroughly agitate the materials. For granular, powdery, or agglomerated materials, the stirring blades 24 can evenly disperse the materials, resulting in a more uniform particle distribution. When conveying multiple materials, the stirring blades 24 can also promote mixing between different materials. Driven by the rotating rod 21, the stirring blades 24 continuously tumble and agitate the materials, ensuring thorough and uniform mixing. For mixtures of materials with different densities, stratification is prone to occur during transportation. The continuous stirring of the agitator blades 24 can break this stratification tendency, ensuring the materials remain in a uniformly mixed state. A scraper is installed at the end of the agitator blades 24. When the rotating rod 21 rotates, the scraper rotates along with the agitator blades 24, scraping the inner wall of the conveying pipe 11. During material transportation, some material may adhere to the inner wall of the conveying pipe 11, accumulating over time to form clumps. This not only reduces the effective diameter of the conveying pipe 11, affecting material transportation efficiency, but may also lead to equipment malfunction. The scraper design can promptly remove adhering material from the pipe wall, keeping the conveying pipe 11 clean and unobstructed, extending the equipment's service life. The scraping action of the scraper also reduces the friction of the material on the inner wall of the conveying pipe 11, reducing the load on the rotating rod 21 and the spiral blades 22, and improving the operational stability of the equipment.Meanwhile, preventing material accumulation on the pipe wall also avoids equipment vibration and noise problems caused by uneven material pressure, providing a more stable and quieter environment for the production process. The scraper design can be adjusted and optimized according to different material characteristics. For example, for some highly viscous materials, a scraper with higher hardness and a sharper shape can be used to improve the scraping effect; for some materials with higher hardness, a scraper material with better wear resistance can be used to prevent the scraper from wearing out too quickly. This flexibility allows the device to adapt to the conveying needs of various materials, improving the equipment's versatility and practicality. Precise discharge guidance, thorough material mixing, and effective pipe wall cleaning make the entire material conveying process more efficient and smooth. It reduces production interruptions and adjustment time caused by poor discharge, uneven material distribution, and equipment failure, thereby improving production efficiency. Enterprises can produce more products in the same amount of time, reducing production costs. Uniform material mixing and stable material conveying help ensure product quality. In the production process, the uniformity and stability of materials are crucial to product performance and quality. The design of this device ensures that materials remain uniform throughout the conveying process, avoiding product quality issues caused by uneven material distribution and improving product qualification rates. The feed drive unit 2 of this sample preparation and feeding device features excellent versatility and adaptability, capable of handling various production scenarios and material characteristics. Whether in continuous or intermittent production, whether conveying a single material or a mixture of multiple materials, this device can achieve effective material conveying and mixing by adjusting parameters such as the rotation speed of the rotating rod 21 and the number and shape of the stirring blades 24. Based on these advantages, this sample preparation and feeding device has broad application prospects in various industries such as mining, metallurgy, chemical, building materials, food, pharmaceuticals, and environmental protection. It can provide reliable material conveying and mixing solutions for these industries, promoting technological progress and industrial upgrading.

[0047] Furthermore, an elastic adjustment mechanism is installed between the scraper and the stirring blade 24 to dynamically adjust the contact pressure between the scraper and the inner wall, avoiding hard friction. The elastic adjustment mechanism can be, but is not limited to, a spring or a rubber pad.

[0048] Furthermore, the conveying body 1 also includes a feeding hopper 14, which is mounted on the conveying pipe 11 and connected to the inlet 111. The inner cavity of the feeding hopper 14 gradually increases in size along the second direction. The feeding hopper 14's unique configuration on the conveying pipe 11 and connection to the inlet 111 greatly facilitates material addition. In actual production scenarios, materials can be added in various ways, either manually or in batches using automated equipment. The feeding hopper 14 ensures that materials can be easily introduced into the conveying system regardless of the addition method. The independent placement of the feeding hopper 14, compared to direct feeding through the opening on the conveying pipe 11, provides operators with a larger operating space and a clearer view. Operators can operate more calmly when adding materials, avoiding operational errors caused by limited space. Simultaneously, the clear view helps operators promptly identify potential problems during material addition, such as material blockage or foreign matter contamination, and take timely measures to address them, ensuring smooth production. As a relatively independent container, the feed hopper 14 can buffer and collect materials. During material addition, even if the operator accidentally shakes their hand or misplaces the material, the material will first fall into the feed hopper 14 instead of spilling directly around the conveying pipe 11 or on the ground. This not only reduces material waste and lowers production costs but also maintains a clean production site and reduces subsequent cleanup work. The feed hopper 14 is conical, with its inner cavity gradually increasing in the second direction. This unique design plays a crucial guiding role in the process of material entering the conveying pipe 11. When material is added to the feed hopper 14, due to the characteristics of the conical structure, the material will naturally converge towards the bottom of the feed hopper 14 under the action of gravity. This converging effect allows the material to quickly concentrate near the inlet 111, reducing the dispersion and residence time of the material in the feed hopper 14 and improving the efficiency of material entering the conveying pipe 11. For example, when conveying powdery materials with poor flowability, the conical feed hopper 14's converging effect effectively prevents bridging and clumping within the hopper, ensuring smooth entry into the conveying pipe 11. The conical structure of the feed hopper 14 has a degree of versatility, adapting to materials with different characteristics. For materials with larger particles and better flowability, the conical feed hopper 14 can quickly guide the material into the conveying pipe 11; while for materials with smaller particles that are easily scattered, the enclosed structure of the feed hopper 14 effectively reduces material scattering and loss, while still ensuring smooth material convergence and feeding. Furthermore, for materials with a certain degree of viscosity, the conical structure of the feed hopper 14 reduces material adhesion to the inner wall of the hopper, improving material conveying efficiency.

[0049] Furthermore, the feed drive unit 2 also includes a drive motor 25, whose shaft is connected to the rotating rod 21 for transmission. The drive motor 25 drives the rotating rod 21 to rotate. As a power source, the drive motor 25 provides strong and continuous power to the rotating rod 21. During material conveying, especially for materials with high viscosity, high density, or long conveying distances, sufficient power is needed to overcome the friction between the material and the inner wall of the conveying pipe 11, as well as the weight of the material itself. The efficient power output of the drive motor 25 ensures that the rotating rod 21 can rotate at a stable speed, thereby driving the spiral blades 22 and the stirring blades 24 to work normally, allowing the material to move smoothly within the conveying pipe 11, avoiding problems such as material blockage and conveying interruption due to insufficient power, and ensuring the continuity and stability of material conveying. The power and performance parameters of the drive motor 25 can be selected and adjusted according to different material characteristics and conveying requirements. For example, when conveying lightweight, free-flowing materials, a smaller power drive motor 25 can be selected to reduce energy consumption and equipment costs; while when conveying heavy, viscous materials, a larger power drive motor 25 is required to ensure sufficient power output. This flexibility allows the feed drive unit 2 to adapt to various complex working conditions, providing reliable power support for both small-scale laboratory experiments and large-scale material conveying in industrial production. A high-quality drive motor 25 exhibits excellent operational smoothness, generating minimal noise and vibration during rotation. This not only helps provide a quiet and comfortable working environment, reducing the impact on operator health, but also reduces the risk of wear and tear and equipment failure due to vibration. Stable operation also helps extend the equipment's service life and reduce maintenance and replacement costs. By controlling the speed of the drive motor 25, the rotational speed of the rotating rod 21 can be precisely adjusted, thereby achieving precise control of the material conveying speed. The speed control function of the drive motor 25 allows operators to flexibly adjust the material conveying speed according to actual needs, meeting the requirements of different production stages. In some production processes with high requirements for material metering, the precise speed control of the drive motor 25 can be combined with a metering device to achieve accurate measurement of the material conveying quantity. By accurately controlling the rotation speed and conveying time of the rotating rod 21, it can be ensured that the amount of material conveyed each time meets production requirements, improving product quality and stability. The drive motor 25's shaft is connected to the rotating rod 21 for transmission, enabling efficient energy transfer. Various transmission connection methods can be used, such as gear transmission, belt transmission, and coupling transmission, each with different characteristics and applicable ranges.

[0050] The conveying pipeline 11 comprises multiple split-type pipes, each with a flange at its port. Fasteners are installed on the flanges of adjacent split-type pipes. The split-type design of the conveying pipeline 11 allows for flexible adjustment of its length according to actual installation requirements. During installation, workers can select an appropriate number of split-type pipes to combine based on the site layout and material conveying path. For example, fewer split-type pipes can be selected in areas with limited space or obstacles, while more can be used in areas requiring long-distance material conveying. This flexibility avoids reprocessing or replacement due to unsuitable pipe lengths, significantly improving installation efficiency. The flanges facilitate easier positioning and alignment when connecting adjacent split-type pipes. Workers can quickly and accurately determine the pipe's installation position using markings or positioning holes on the flanges, ensuring the sealing and stability of the pipe connections. Simultaneously, the flat surface of the flanges provides a good foundation for fastener installation, reducing difficulties in fastener installation or insecure connections caused by pipe misalignment. Because the installation process of segmented pipelines is relatively simple and does not require complex processing and adjustments, it can greatly reduce installation time and labor costs. Workers only need to connect the segmented pipelines sequentially according to the predetermined installation order and secure them with fasteners. When a fault occurs in the conveying pipeline 11, the segmented design allows workers to quickly locate the fault. Since each segmented pipeline is an independent unit, workers can quickly find the problematic pipeline segment by checking it section by section, avoiding prolonged downtime caused by the difficulty of troubleshooting integrated pipelines. For example, if a leak or blockage is found in a certain pipeline segment, workers can directly repair or replace that segment without shutting down the entire conveying pipeline 11 for maintenance. During maintenance, if a segmented pipeline is damaged or aged, workers can easily disassemble it and replace it with a new segment. This partial replacement method not only reduces maintenance costs but also significantly shortens maintenance time, reducing production losses caused by equipment downtime. At the same time, the standardized design of the segmented pipelines also makes component replacement more convenient; workers can prepare spare pipeline segments in advance for immediate replacement when needed. The segmented pipeline design also facilitates the cleaning and maintenance of the conveying pipeline 11. Workers can periodically clean each segment individually, ensuring the cleanliness of the pipeline's inner wall and reducing the risk of material residue and blockage. Simultaneously, during maintenance, the connection points of each pipeline segment can be inspected and maintained, allowing for the timely detection and resolution of potential problems, thus extending the service life of the conveying pipeline 11. The segmented design also allows the conveying pipeline 11 to be disassembled into multiple smaller segments during transportation, significantly reducing the space required for transport.Compared to monolithic piping, modular piping allows for more compact stacking and transportation, improving efficiency and reducing costs. Due to their smaller size and lighter weight, modular piping is more stable during transport and less susceptible to damage from collisions and compression. Furthermore, even if a section of modular piping is damaged during transport, only that section needs to be replaced, without affecting the use of other sections, thus reducing transportation risks and losses.

[0051] Furthermore, the sample feeding device also includes a discharge unit 4, which includes a discharge pipe 41 and a switch valve 42 installed within the discharge pipe 41. A discharge port 113 is provided in the middle section of the conveying pipe 11, and the discharge pipe 41 is installed on the conveying pipe 11 and connected to the discharge port 113. The switch valve 42 can be, but is not limited to, an electric ball valve, a pneumatic gate valve, or an electric gate valve. The switch valve 42 provides a high degree of controllability to the discharge process. During normal sample feeding, the switch valve 42 is closed, ensuring that the material can be stably conveyed within the conveying pipe 11 along a preset path, guaranteeing the continuity and accuracy of the sample preparation process. When it is necessary to discharge specific materials or perform a discharge operation, simply open the switch valve 42, and the material can be smoothly discharged through the discharge pipe 41 under the recoil force generated by the reverse rotation of the rotating rod 21. This precise discharge control avoids disorderly material discharge, reduces material waste, and also facilitates accurate measurement and analysis of the discharged material, providing more accurate data support for subsequent sample preparation work. During sample preparation, different stages and materials may be involved. The design of the discharge unit 4 enables seamless connection between various stages of the sample preparation process. For example, after completing a certain stage of sample preparation, the intermediate materials generated in that stage need to be discharged to prepare for the next stage. At this time, by opening the switch valve 42 and rotating the rotating rod 21 in the reverse direction, the intermediate materials can be discharged quickly and accurately, avoiding material residue and cross-contamination in the conveying pipe 11, thus improving the efficiency of the sample preparation process and the accuracy of the sample preparation results. Different sample preparation tasks may have different requirements for material discharge. The flexibility of the discharge unit 4 allows this sample feeding device to meet diverse sample preparation needs. For example, for materials that need to be discharged in batches, the batch discharge can be achieved by controlling the opening time of the switch valve 42 and the reverse rotation speed of the rotating rod 21. For materials that need to be discharged in a specific direction, the outlet direction of the discharge pipe 41 can be adjusted to accurately discharge the material to the designated location. After the equipment has been running for a long time, some material may remain in the conveying pipe 11. These residual materials not only affect the normal operation of the equipment but may also lead to cross-contamination, affecting the accuracy of sample preparation results. The design of the discharge unit 4 makes cleaning residual materials more convenient. By opening the switch valve 42 and rotating the rotating rod 21 in the reverse direction, all residual materials in the conveying pipe 11 can be discharged, avoiding the tediousness and difficulty of manual cleaning. When components such as the conveying pipe 11 or the rotating rod 21 malfunction, the discharge unit 4 can serve as an important means of troubleshooting. For example, if a blockage occurs in the conveying pipe 11, the blockage can be attempted to be discharged by opening the switch valve 42 and rotating the rotating rod 21 in the reverse direction to restore the normal operation of the equipment. If the fault cannot be resolved by the discharge operation, the discharge unit 4 can also facilitate the disassembly and maintenance of the equipment.Workers can first drain the material from the conveying pipe 11 before disassembling and repairing the faulty parts, reducing the risk of material leakage and environmental pollution, while also lowering maintenance difficulty and costs. Regular cleaning and maintenance are crucial for extending equipment lifespan. The discharge unit 4 makes cleaning and maintenance more convenient and efficient. By promptly draining residual material and impurities from the conveying pipe 11, wear and corrosion of equipment components are reduced, improving equipment reliability and stability. Simultaneously, the design of the discharge unit 4 makes equipment maintenance more timely and accurate, avoiding equipment damage and production interruptions due to equipment failure, further extending equipment lifespan. Material blockage is a common problem during the operation of sample feeding devices. If blockage is not addressed promptly, it can lead to equipment damage, material leakage, or even safety accidents. The design of the discharge unit 4 provides an effective solution for handling material blockage. When a blockage is detected in the conveying pipe 11, workers can immediately open the switch valve 42 and reverse the rotating rod 21 to attempt to drain the blocked material. If the blockage is severe and cannot be resolved with a single discharge operation, the discharge operation can be repeated multiple times until the blockage is completely resolved. During the sample preparation and feeding process, if the conveying pipe 11 or the discharge pipe 41 is damaged or not properly sealed, it may lead to material leakage, causing environmental pollution and resource waste. The design of the discharge unit 4 can prevent material leakage and pollution to a certain extent. When a pipe is found to be damaged or leaking, the operator can promptly close the switch valve 42 to stop further leakage. Then, the damaged pipe can be repaired or replaced to ensure the normal operation of the equipment.

[0052] Furthermore, the discharge adjustment unit 3 also includes a discharge pipe 32, which is disposed on the conveying pipe 11 and connected to the discharge port 112. A baffle 31 is slidably disposed at the opening of the discharge pipe 32. The baffle 31 is used to adjust the size of the opening of the discharge pipe 32, and the area of ​​the baffle 31 is not less than the cross-sectional area of ​​the opening of the discharge pipe 32. The design of the baffle 31 being slidably disposed at the opening of the discharge pipe 32, and having an area not less than the cross-sectional area of ​​the opening, allows for precise adjustment of the opening size of the discharge pipe 32 by sliding the baffle 31 along the first direction. In actual production, the requirements for the material discharge volume vary at different process stages. For example, a larger discharge volume may be required in the initial mixing stage for rapid and uniform mixing, while a smaller discharge volume is required in the subsequent fine processing stage to ensure processing accuracy. This discharge adjustment unit 3 can flexibly adjust the position of the baffle 31 according to specific needs, precisely control the material discharge rate, ensure that the production process meets the process requirements, avoid material accumulation or insufficient supply due to improper discharge rate, and improve the rationality and efficiency of the production process. Precise discharge rate control helps stabilize the production rhythm. In continuous production, a stable material discharge rate is key to ensuring product quality and production efficiency. If the discharge rate is too high, it may lead to untimely processing of materials in subsequent processing stages, causing blockages or uneven processing; if the discharge rate is too low, it may cause equipment to be idle and reduce production efficiency. The discharge adjustment unit 3, by flexibly adjusting the size of the nozzle, keeps the material discharge rate always within a suitable range, ensuring the coordinated operation of each production stage, avoiding production problems caused by fluctuations in discharge rate, and maintaining the stability of the production rhythm. Precise discharge rate control can effectively reduce material waste. In traditional production, due to the difficulty in precisely controlling the discharge rate, material overflow or insufficient discharge often occurs. Overflow not only causes material waste but may also pollute the production environment; insufficient discharge affects production progress and product quality. The discharge adjustment unit 3 precisely controls the discharge rate, ensuring materials are output on demand, reducing unnecessary waste, lowering production costs, and minimizing environmental problems caused by improper material handling. A stable material discharge rate is crucial for normal equipment operation. Excessive discharge forces the equipment to withstand greater pressure, leading to accelerated wear and frequent malfunctions; insufficient discharge causes idling, wasting energy and damaging the equipment. The discharge adjustment unit 3 precisely controls the discharge rate, ensuring materials enter subsequent equipment at the appropriate speed and quantity, reducing the equipment's burden, extending its lifespan, and lowering maintenance and replacement costs. Uneven discharge rates during material transport can easily cause blockages or jams in pipes or equipment. This not only affects production efficiency but can also lead to equipment malfunctions or even production interruptions. The fine-tuning function of the discharge adjustment unit 3 ensures uniform and stable material output, effectively preventing blockages and jams, guaranteeing normal equipment operation, and improving production continuity and stability.In a multi-variety, small-batch production model, different products have different requirements for material output. The flexibility of the discharge adjustment unit 3 allows production to quickly adapt to different process requirements. For example, for products that require precise control of the discharge amount, the baffle 31 can be slid to a smaller pipe opening position to achieve a small discharge output; while for materials that require rapid conveying, the pipe opening size can be increased to improve the discharge amount.

[0053] Furthermore, the discharge adjustment unit 3 also includes a linear drive module 33, used to drive the baffle 31 to move along the first direction. The linear drive module 33 is connected to the baffle 31 in a transmission manner. The linear drive module 33 (such as a cylinder, hydraulic cylinder, electric cylinder, lead screw slide module, etc.) has high-precision displacement control capabilities. Taking the lead screw slide module as an example, it can achieve micron-level displacement adjustment of the baffle 31 along the first direction through the precise cooperation of the lead screw and nut. This high-precision adjustment makes the size of the discharge pipe 32 change extremely fine, thereby enabling precise control of the material discharge amount. Different production processes and products have different requirements for the material discharge amount. The linear drive module 33 can flexibly adjust the moving distance and speed of the baffle 31 according to actual needs, thereby precisely controlling the size of the discharge pipe 32 and achieving a wide range of adjustment from large to small discharge amounts. Traditional manual adjustment methods are easily affected by the operator's skill level, experience, and subjective judgment, resulting in large errors in the discharge amount control. The transmission connection between the linear drive module 33 and the baffle 31 automates the discharge rate control, eliminating human error. Operators only need to set the required discharge rate parameters, and the linear drive module 33 automatically and precisely adjusts the position of the baffle 31, ensuring the material discharge rate remains stable near the set value, significantly improving the accuracy and reliability of discharge rate control. The linear drive module 33 can be integrated with the factory's automation control system (such as a PLC) to achieve remote control and automated operation. Operators can set parameters and control the operation of the linear drive module 33 through a control terminal (such as a computer or touchscreen), eliminating the need for on-site manual operation. This remote control and automation integration not only improves the level of automation in production but also reduces manual intervention, lowers labor intensity, and increases production efficiency.

[0054] Furthermore, a silicone sealing strip is attached to the edge of the baffle 31, which fits tightly against the edge of the discharge port 112 when closed to prevent material leakage.

[0055] Example 2

[0056] This embodiment provides a sample preparation and feeding device. Compared with Embodiment 1, the basic structure of the sample preparation and feeding device provided in this embodiment is the same as that in Embodiment 1. Only the setting of the discharge adjustment unit 3 is different. This embodiment will not describe the structure that is the same as that in Embodiment 1 again.

[0057] like Figure 4 As shown, the discharge adjustment unit 3 further includes a discharge pipe 32, which is installed on the conveying pipe 11 and connected to the discharge port 112. A baffle 31 is rotatably installed inside the discharge pipe 32. The baffle 31 is used to adjust the size of the discharge pipe 32, and its area is not greater than the cross-sectional area of ​​the discharge pipe 32. The baffle 31 can be driven to rotate by a servo motor, and the flow area of ​​the discharge pipe 32 can be finely adjusted by precisely controlling the tilt angle of the baffle 31. Because the servo motor has high-precision position control capability, the rotation angle of the baffle 31 can be accurate to a very small unit, thereby achieving fine adjustment of the material discharge amount. Different materials have different physical properties, such as viscosity, particle size, and flowability, which affect the flow state of the material in the pipe. The rotating baffle 31 can be adjusted according to the material characteristics by adjusting the tilt angle to adapt to different material flow requirements. For materials with high viscosity, appropriately reducing the tilt angle of baffle 31 can increase the contact area between the material and the pipe wall, reducing material residue in the pipe. For materials with good flowability, the tilt angle can be increased to improve the material flow rate and achieve efficient discharge. The servo motor-driven rotating baffle 31 features fast response and precise control, and can adjust the position of baffle 31 in real time according to the set discharge parameters, effectively reducing discharge fluctuations.

[0058] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A sample preparation and feeding device, characterized in that, include: The conveying body (1) includes a conveying pipe (11), which extends along a first direction. The upper pipe wall at the beginning of the conveying pipe (11) is provided with a feed inlet (111), and the lower pipe wall at the end of the conveying pipe (11) is provided with a discharge outlet (112). The feed drive unit (2) is used to push the material in the conveying pipe (11) to be conveyed along the first direction. The feed drive unit (2) includes a rotating rod (21) and a spiral blade (22). The rotating rod (21) is rotatably disposed in the conveying pipe (11). The spiral blade (22) is disposed on the rotating rod (21). The pitch of the spiral blade (22) gradually increases in the opposite direction to the first direction. The discharge adjustment unit (3) includes a baffle (31), which is disposed at the discharge port (112) and is used to adjust the discharge amount of material at the discharge port (112).

2. The sample preparation and feeding device according to claim 1, characterized in that, The conveying body (1) further includes a first sealing cover (12) and a second sealing cover (13). The first sealing cover (12) and the second sealing cover (13) are respectively sealed to both ends of the conveying pipe (11), and both ends of the rotating rod (21) are rotatably connected to the first sealing cover (12) and the second sealing cover (13).

3. The sample preparation and feeding device according to claim 2, characterized in that, The feed drive unit (2) further includes: A baffle plate (23) is disposed at one end of the rotating rod (21) near the second closed cover (13), and the outer diameter of the baffle plate (23) is not greater than the inner diameter of the conveying pipe (11); A stirring blade (24) is provided. Several stirring blades (24) are circumferentially spaced on the rotating rod (21) and located between the spiral blade (22) and the baffle plate (23). A scraper is provided at the end of the stirring blade (24).

4. The sample preparation and feeding device according to claim 3, characterized in that, The conveying body (1) also includes a feeding hopper (14), which is disposed on the conveying pipe (11) and connected to the feed inlet (111). The inner cavity of the feeding hopper (14) gradually increases along the second direction.

5. The sample preparation and feeding device according to claim 3, characterized in that, The feed drive unit (2) further includes a drive motor (25), the shaft of which is connected to the rotating rod (21) for transmission, and the drive motor (25) is used to drive the rotating rod (21) to rotate.

6. The sample preparation and feeding device according to claim 3, characterized in that, The conveying pipeline (11) includes multiple split pipelines, each of which has a flange at its port and fasteners are installed on the flanges of two adjacent split pipelines.

7. The sample preparation and feeding device according to claim 3, characterized in that, The sample feeding device also includes a discharge unit (4), which includes a discharge pipe (41) and a switch valve (42) installed in the discharge pipe (41). The middle section of the conveying pipe (11) is provided with a discharge port (113). The discharge pipe (41) is installed on the conveying pipe (11) and is connected to the discharge port (113).

8. The sample preparation and feeding device according to any one of claims 1-7, characterized in that, The discharge adjustment unit (3) further includes a discharge pipe (32), which is disposed on the conveying pipe (11) and connected to the discharge port (112). The baffle (31) is slidably disposed at the opening of the discharge pipe (32). The baffle (31) is used to adjust the size of the opening of the discharge pipe (32). The area of ​​the baffle (31) is not less than the cross-sectional area of ​​the opening of the discharge pipe (32).

9. The sample preparation and feeding device according to claim 8, characterized in that, The discharge adjustment unit (3) also includes: A linear drive module (33) is used to drive the baffle (31) to move along the first direction, and the linear drive module (33) is connected to the baffle (31) in a transmission connection.

10. The sample preparation and feeding device according to any one of claims 1-7, characterized in that, The discharge adjustment unit (3) further includes a discharge pipe (32), which is disposed on the conveying pipe (11) and connected to the discharge port (112). The baffle (31) is rotatably disposed inside the discharge pipe (32). The baffle (31) is used to adjust the pipe size of the discharge pipe (32). The area of ​​the baffle (31) is not greater than the cross-sectional area of ​​the discharge pipe (32).

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