A sample dosing device

Abstract

The utility model belongs to the technical field of feeder, disclose a kind of sample feeder, including feeder tank and baffle mechanism, feeder tank is equipped with inlet, outlet and accommodating cavity, inlet and outlet are communicated with accommodating cavity, sample material can enter accommodating cavity by inlet, and can discharge accommodating cavity by outlet, baffle mechanism includes baffle and first driving part, baffle is attached with the inner wall of accommodating cavity and movably connected, the orthographic projection area of baffle on the inner wall of accommodating cavity is greater than or equal to the cross-sectional area that inlet is communicated with accommodating cavity, first driving part is drivingly connected to baffle, first driving part is used to drive baffle to move on the inner wall of accommodating cavity, the moving track of baffle covers inlet, baffle is used to adjust the size of the section that inlet is communicated with accommodating cavity. The sample feeder can infinitely adjust the feeding amount discharged from outlet to accommodating cavity, and can also clean the inner wall of accommodating cavity online.

Description

Technical Field

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

[0002] In the sampling, sample preparation, and testing of materials such as ores and coal, many steps have requirements on the sample feed rate, such as the crushing, grinding, and fractionation stages.

[0003] Existing sample feeding devices can only perform coarse adjustment of the feeding rate, thus failing to provide precise control over the feeding rate. Furthermore, existing sample feeding devices require periodic shutdowns for cleaning, reducing sample preparation efficiency.

[0004] Therefore, there is an urgent need to develop a sample feeding device to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a sample feeding device that can infinitely adjust the amount of material discharged from the outlet into the receiving cavity, and can also clean the inner wall of the receiving cavity online.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A sample feeding device, comprising:

[0008] The feeding box is equipped with an inlet, an outlet, and a receiving cavity. Both the inlet and the outlet are connected to the receiving cavity. The sample material can enter the receiving cavity through the inlet and exit the receiving cavity through the outlet.

[0009] The baffle mechanism includes a baffle and a first driving member. The baffle is attached to and movably connected to the inner wall of the receiving cavity. The orthographic projection area of ​​the baffle on the inner wall of the receiving cavity is greater than or equal to the cross-sectional area of ​​the feed inlet communicating with the receiving cavity. The first driving member is driven and connected to the baffle. The first driving member is used to drive the baffle to move on the inner wall of the receiving cavity. The movement trajectory of the baffle covers the feed inlet. The baffle is used to adjust the size of the cross-section of the feed inlet communicating with the receiving cavity.

[0010] Optionally, the receiving cavity is cylindrical, and the baffle is an arc-shaped plate with the same curvature as the inner wall of the receiving cavity. The first driving member is used to drive the baffle to rotate around the axis of the receiving cavity.

[0011] Optionally, the sample feeding device further includes an impeller mechanism, which includes an impeller and a second driving member. The impeller is located in the receiving cavity, and the inlet and outlet are distributed vertically. The inlet is located above the impeller, and the outlet is located below the impeller. The impeller includes a base and at least two blades. The blades are connected to the base, and all blades are distributed circumferentially along the base. A material trough is formed between two adjacent blades. The cross-sectional area of ​​the trough opening is greater than or equal to the cross-sectional area of ​​the inlet and the receiving cavity. The second driving member is driven and connected to the base. The second driving member is used to drive the base to rotate about the axis of the base so that the trough opening points to the inlet or the outlet.

[0012] Optionally, the base body and the receiving cavity are coaxial, and the side of the blade away from the base body is attached to and movably connected to the side of the baffle away from the inner wall of the receiving cavity.

[0013] Optionally, the blade includes a body and a scraping part. One side of the body is connected to the base and the other side is connected to the scraping part. The scraping part is attached to and movably connected to the side of the baffle away from the inner wall of the receiving cavity, and the scraping part is attached to and movably connected to the inner wall of the receiving cavity. The scraping part is an elastic element or a flexible element.

[0014] Optionally, the blades and the base can be detachably connected.

[0015] Optionally, the sample feeding device may also include a vibration mechanism;

[0016] The vibration mechanism includes a first vibrator, which is mounted on the feed box;

[0017] And / or, the vibration mechanism includes a second vibrator, the feed box is provided with a feed hopper, the feed hopper is connected to the feed inlet, and the second vibrator is disposed on the feed hopper.

[0018] Optionally, the sample feeding device also includes a torque sensor and a controller. The torque sensor is used to detect the torsional torque of the impeller. Both the torque sensor and the vibration mechanism are communicatively connected to the controller. The controller can start the vibration mechanism and / or change at least one of the amplitude, frequency, and speed of the vibration mechanism.

[0019] Optionally, the first drive unit is communicatively connected to the controller, which can start and stop the first drive unit;

[0020] And / or, the second drive unit is communicatively connected to the controller, which is able to change the rotational speed of the drive end of the second drive unit.

[0021] Optionally, the sample feeding device also includes a position sensor, which is used to detect the relative position of the trough opening and the feed inlet, and the position sensor is communicatively connected to the controller.

[0022] The beneficial effects of this utility model are:

[0023] First, since the baffle is attached to and movably connected to the inner wall of the receiving cavity, and the movement trajectory of the baffle covers the inlet, the size of the cross-section connecting the inlet and the receiving cavity can be adjusted by adjusting the position of the baffle through the first driving component. This allows for adjustment of the amount of material entering the receiving cavity from the inlet. Furthermore, as the baffle moves continuously, the cross-sectional area connecting the inlet and the receiving cavity changes continuously, thus achieving stepless adjustment of the amount of material entering the cavity. This, in turn, allows for stepless adjustment of the amount of material discharged from the receiving cavity from the outlet, which is beneficial for achieving precise control of the feeding amount of the sample feeding device.

[0024] Secondly, since the baffle is attached to and movably connected to the inner wall of the receiving cavity, the baffle can scrape and clean the inner wall of the receiving cavity when it moves, thus achieving online cleaning of the sample feeding device and improving the continuous operation capability and feeding efficiency of the sample feeding device. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the sample feeding device provided by this utility model;

[0026] Figure 2 This is a cross-sectional structural diagram of the sample feeding device provided by this utility model.

[0027] In the picture:

[0028] 100. Feed box; 110. Inlet; 120. Outlet; 130. Receiving cavity; 140. Feed hopper; 150. Outlet hopper; 210. Baffle; 220. First drive component; 230. Mounting plate; 310. Second drive component; 321. Base; 322. Blade; 3221. Main body; 3222. Scraper; 3223. Key structure; 323. Feed trough; 330. Bearing; 340. Connecting shaft; 410. First vibrator; 420. Second vibrator. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0030] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 utility model based on the specific circumstances.

[0031] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0033] This embodiment provides a sample feeding device that can infinitely adjust the amount of material discharged from the outlet into the receiving cavity, and can also clean the inner wall of the receiving cavity online.

[0034] Specifically, such as Figure 1 and Figure 2As shown, the sample feeding device includes a feeding box 100 and a baffle mechanism. The feeding box 100 has an inlet 110, an outlet 120, and a receiving cavity 130. Both the inlet 110 and the outlet 120 are connected to the receiving cavity 130. Sample material (not shown in the figure) can enter the receiving cavity 130 through the inlet 110 and exit the receiving cavity 130 through the outlet 120. The baffle mechanism includes a baffle 210 and a first driving member 220. The baffle 210 is connected to the receiving cavity. The inner wall of cavity 130 is attached and movable. The orthographic projection area of ​​baffle 210 on the inner wall of cavity 130 is greater than or equal to the cross-sectional area of ​​the feed inlet 110 and cavity 130. The first driving member 220 is connected to baffle 210 and is used to drive baffle 210 to move on the inner wall of cavity 130. The movement trajectory of baffle 210 covers feed inlet 110. Baffle 210 is used to adjust the size of the cross-section of feed inlet 110 and cavity 130.

[0035] Since the baffle 210 is attached to and movably connected to the inner wall of the receiving cavity 130, and the movement trajectory of the baffle 210 covers the inlet 110, the size of the cross section connecting the inlet 110 and the receiving cavity 130 can be adjusted by adjusting the position of the baffle 210 through the first driving member 220. This allows for adjustment of the amount of material entering the receiving cavity 130 from the inlet 110. Furthermore, as the baffle 210 moves continuously, the cross-sectional area connecting the inlet 110 and the receiving cavity 130 changes continuously, thereby achieving stepless adjustment of the amount of material entering the receiving cavity 130. This also allows for stepless adjustment of the amount of material discharged from the outlet 120 from the receiving cavity 130, which is beneficial for achieving precise control of the feeding amount of the sample feeding device.

[0036] On the other hand, since the baffle 210 is attached to and movably connected to the inner wall of the receiving cavity 130, the baffle 210 can scrape and clean the inner wall of the receiving cavity 130 when it moves, thus achieving online cleaning of the sample feeding device and improving the continuous operation capability and feeding efficiency of the sample feeding device.

[0037] On the other hand, the sample feeding device has a simple structure, which helps to reduce the complexity of the device and the production cost.

[0038] Furthermore, the receiving cavity 130 is cylindrical, and the baffle 210 is an arc-shaped plate with the same curvature as the inner wall of the receiving cavity 130. The first driving member 220 is used to drive the baffle 210 to rotate around the axis of the receiving cavity 130. This enables the baffle 210 to move continuously on the inner wall of the receiving cavity 130. In addition, the curvature of the baffle 210 is the same as the curvature of the inner wall of the receiving cavity 130, which allows the baffle 210 to form a good fit with the inner wall of the receiving cavity 130. This not only improves the cleaning effect of the baffle 210 on the inner wall of the receiving cavity 130, but also reduces the probability of sample material leaking out from the gap between the baffle 210 and the inner wall of the receiving cavity 130, thereby helping to improve the accuracy of the feed rate adjustment.

[0039] Furthermore, the baffle 210 rotates at an angle of 360°, enabling the baffle 210 to clean the inner wall of the receiving cavity 130 from 360°, thereby further improving the cleaning effect of the baffle 210 on the inner wall of the receiving cavity 130.

[0040] In another embodiment, the first drive member 220 is used to drive the baffle 210 to reciprocate in a direction perpendicular to the axis of the feed port 110, thereby realizing the continuous movement of the baffle 210 on the inner wall of the receiving cavity 130.

[0041] Optionally, the sample feeding device further includes an impeller mechanism, which includes an impeller and a second drive member 310. The impeller is located within the receiving cavity 130. The inlet 110 and the outlet 120 are distributed vertically, with the inlet 110 located above the impeller and the outlet 120 located below the impeller. The impeller includes a base 321 and at least two blades 322. For example, the number of blades 322 can be two, three, four, or more. The blades 322 are connected to the base 321. Next, all blades 322 are distributed circumferentially along the base 321, and a material groove 323 is formed between two adjacent blades 322. The cross-sectional area of ​​the groove opening of the material groove 323 is greater than or equal to the cross-sectional area of ​​the inlet 110 and the receiving cavity 130. The second driving member 310 is driven and connected to the base 321. The second driving member 310 is used to drive the base 321 to rotate about the axis of the base 321, so that the groove opening of the material groove 323 points to the inlet 110 or the outlet 120. When the opening of the feed trough 323 points to the inlet 110, the sample material enters the feed trough 323 through the inlet 110 under the action of gravity. The second driving component 310 drives the base 321 to rotate, causing the blades 322 and the sample material in the feed trough 323 to rotate together with the base 321. When the opening of the feed trough 323 points to the outlet 120, the sample material in the feed trough 323 is discharged from the receiving cavity 130 through the outlet 120 under the action of gravity, thus realizing the feeding of the sample feeding device. This structure achieves the effect of quantitative feeding of the sample feeding device, and the amount of sample material contained in the feed trough 323 is the feeding amount of the feed trough 323.

[0042] Furthermore, the seat 321 is coaxial with the receiving cavity 130, and the side of the blade 322 facing away from the seat 321 is attached to and movably connected to the side of the baffle 210 facing away from the inner wall of the receiving cavity 130. When the seat 321 and the baffle 210 rotate, the side of the baffle 210 facing away from the inner wall of the receiving cavity 130 scrapes the side of the blade 322 facing away from the seat 321, thereby achieving the cleaning effect of the baffle 210 on the blade 322.

[0043] Furthermore, the blade 322 includes a body 3221 and a scraping part 3222. One side of the body 3221 is connected to the base 321, and the other side is connected to the scraping part 3222. The scraping part 3222 is attached to and movably connected to the side of the baffle 210 away from the inner wall of the receiving cavity 130, and is also attached to and movably connected to the inner wall of the receiving cavity 130. The scraping part 3222 is an elastic element or a flexible element. When the blade 322 rotates with the base 321, the scraping part 3222 scrapes the inner wall of the receiving cavity 130, thus achieving the cleaning effect of the blade 322 on the inner wall of the receiving cavity 130. When the blade 322 rotates to the baffle 210, the scraping part 3222 deforms, allowing it to adhere to the side of the baffle 210 away from the inner wall of the receiving cavity 130 and move relative to the baffle 210, thus cleaning the scraping part 3222 by the baffle 210. Secondly, the adhesion between the scraping part 3222 and the inner wall of the receiving cavity 130 achieves a sealing effect on the material trough 323, preventing sample material from falling out of the trough 323 during impeller rotation, and improving the accuracy of the sample feeding device. Furthermore, the scraping part 3222 is an elastic or flexible element, which can ensure the sealing between the scraping part 3222 and the inner wall of the receiving cavity 130, and between the scraping part 3222 and the baffle 210, reduce material leakage between the material troughs 323, improve the cleaning effect of the inner wall of the receiving cavity 130 and the scraping part 3222, and also reduce the noise and wear of the scraping part 3222 when it rotates with the seat 321, thereby reducing the operating noise of the sample feeding device and extending its service life.

[0044] Furthermore, the scraping part 3222 is made of polyurethane or wear-resistant rubber, etc., to ensure that the scraping part 3222 can deform to a certain extent and fit tightly with the inner wall of the receiving cavity 130 and the baffle 210.

[0045] The first driving component 220 and the second driving component 310 can be driving components with rotary driving functions, such as rotary drive motors, rotary cylinders, or hydraulic motors, which will not be listed here.

[0046] Optionally, the impeller mechanism further includes a bearing 330 and a connecting shaft 340. The outer ring of the bearing 330 is mounted on the feed box 100, and the drive shaft of the second drive member 310 passes through the inner ring of the bearing 330 so that the bearing 330 supports the drive shaft of the second drive member 310. One end of the connecting shaft 340 is connected to the drive shaft of the second drive member 310, and the other end is fixedly connected to the base 321, thereby realizing the drive connection between the second drive member 310 and the base 321.

[0047] Optionally, the baffle mechanism further includes a mounting plate 230. The first driving member 220 and the second driving member 310 are respectively located on both sides of the axial direction of the receiving cavity 130. The mounting plate 230 is located inside the receiving cavity 130 and on the side of the receiving cavity 130 facing the first driving member 220. The drive shaft of the first driving member 220 passes through the feed box 100 and is connected to the mounting plate 230. The mounting plate 230 is connected to the baffle 210, thereby realizing the driving connection between the first driving member 220 and the baffle 210.

[0048] Optionally, the blade 322 is detachably connected to the base 321, thus forming a detachable modular structure for the impeller. When it is necessary to replace the blade 322, or when a deep cleaning is required, the blade 322 can be removed from the base 321. In addition, this structure allows the impeller to be fitted with blades 322 of different specifications to accommodate different types of sample materials, improving the versatility of the sample feeding device.

[0049] Furthermore, the base 321 is provided with a keyway, and the blade 322 has a key structure 3223 on the side facing the base 321. The key structure 3223 is detachably inserted into the keyway to achieve a detachable connection between the blade 322 and the base 321. To facilitate the disassembly and installation of the blade 322, the keyway extends along the axial direction of the base 321 and passes through one end of the base 321, thereby allowing the key structure 3223 to be inserted into the keyway from one end.

[0050] In another embodiment, the blade 322 is detachably connected to the base 321 by means of connecting elements such as bolts.

[0051] Optionally, the sample feeding device further includes a vibration mechanism, which includes a first vibrator 410 and a second vibrator 420. The first vibrator 410 is mounted on the feeding box 100, which has an inlet hopper 140 connected to the inlet 110. The second vibrator 420 is mounted on the inlet hopper 140. This accelerates the flow of the sample material, allowing it to quickly pass through the inlet 110 into the trough 323 and then quickly exit the sample feeding device through the outlet 120. Furthermore, the vibration mechanism prevents clumping of the sample material in the trough 323, at the inlet 110, and at the outlet 120, ensuring that the sample material continuously and evenly passes through the inlet 110 into the trough 323 and exits through the outlet 120, thus facilitating uniform feeding. Furthermore, the vibration mechanism can shake off the loosely sticky fine dust adhering to the inner wall of the accommodating cavity 130 and the blades 322, complementing the cleaning of the baffles 210 and the blades 322, thus improving the overall cleaning effect.

[0052] In other embodiments, the vibration mechanism may also include one of a first vibrator 410 and a second vibrator 420. In this embodiment, the vibration mechanism includes a first vibrator 410 and a second vibrator 420, thereby improving the vibration effect of the vibration mechanism.

[0053] Optionally, the feed box 100 is also provided with a discharge hopper 150, which is connected to the discharge port 120 to facilitate the collection of sample material discharged from the discharge port 120.

[0054] Optionally, the sample feeding device also includes a torque sensor and a controller (neither the torque sensor nor the controller is shown in the figure). The torque sensor is used to detect the torsional torque of the impeller. Both the torque sensor and the vibration mechanism are communicatively connected to the controller. The controller can start the vibration mechanism. The torque sensor can detect the rotational resistance experienced by the blade 322 when it rotates. When the inlet 110, outlet 120, or the opening of the trough 323 is slightly blocked, the rotational resistance experienced by the blade 322 increases. The controller then controls the vibration mechanism to start, thereby breaking up the blocked sample material and reducing the probability of blockage in the sample feeding device. In addition, when there is no slight blockage in the inlet 110, outlet 120, or the opening of the trough 323, the controller can also control the vibration mechanism to start, enabling the sample feeding device to feed quickly, continuously, and uniformly.

[0055] Furthermore, the torque sensor is integrated into the second drive unit 310 to improve the integration of the sample feeding device.

[0056] Optionally, the controller can change at least one of the amplitude, frequency, and velocity of the vibration mechanism. This allows the controller to adjust the vibration magnitude of the vibration mechanism according to the rotational resistance experienced by the blade 322, thereby achieving the effect of rapidly breaking up the blockage sample material.

[0057] Optionally, the first drive unit 220 is communicatively connected to the controller. The controller can start and stop the first drive unit 220, thereby controlling the relative position of the baffle 210 and the inlet 110, adjusting the area of ​​the baffle 210 blocking the inlet 110, that is, adjusting the cross-sectional area of ​​the inlet 110 communicating with the receiving cavity 130, and realizing the control of the feeding amount. In addition, when the inlet 110 is slightly blocked, the controller activates the first drive unit 220 to move the baffle 210 to expand the cross-sectional area of ​​the inlet 110 communicating with the receiving cavity 130, so that the sample material blocked at the inlet 110 can pass through the inlet 110 smoothly, reducing the risk of blockage at the inlet 110.

[0058] Optionally, the second drive unit 310 is communicatively connected to the controller, which can change the rotational speed of the drive end of the second drive unit 310. The rotational speed of the impeller determines the amount of sample material falling from the inlet 110 into the trough 323, and also determines the speed at which the sample material is discharged from the outlet 120. Therefore, by controlling the rotational speed of the drive end of the second drive unit 310, the controller can control the amount of sample material falling from the inlet 110 into the trough 323, and thus control the amount of sample material falling from the trough 323 into the outlet 120. This is beneficial for further achieving precise control of the feeding amount of the sample feeding device. In addition, by controlling the rotational speed of the drive end of the second drive unit 310, the controller can also control the feeding speed of the sample feeding device, improving the controllability of the feeding speed.

[0059] Optionally, the sample feeding device also includes a position sensor (not shown in the figure). The position sensor is used to detect the relative position of the opening of the material trough 323 and the inlet 110. The position sensor is communicatively connected to the controller. This allows the detection of whether the opening of the target material trough is directly below the inlet 110, preventing sample material at the inlet 110 from falling onto the scraper 3222 or other areas (mainly referring to the material troughs adjacent to the target material trough). This helps improve the consistency of the sample material quantity in multiple material troughs 323, and further facilitates the precise control of the feeding amount of the sample feeding device.

[0060] Furthermore, the position sensor includes a proximity switch and a sensing element. The proximity switch is disposed on the inner wall of the feed hopper 140 and is located on the side of the feed hopper 140 facing the feed inlet 110. Each blade 322 is provided with a sensing element. When the proximity switch senses the sensing element, the slot of the trough 323 is located directly below the feed inlet 110.

[0061] In another embodiment, the position sensor includes a photoelectric sensor and a sensing plate. The photoelectric sensor is disposed on the inner wall of the feed hopper 140 and is located on the side of the feed hopper 140 facing the feed inlet 110. Each blade 322 is provided with a sensing plate. When the photoelectric sensor senses the sensing plate, the slot of the trough 323 is located directly below the feed inlet 110.

[0062] The working principle of the sample feeding device provided in this embodiment is briefly explained below:

[0063] When the sample feeding device starts feeding, the controller controls the first drive unit 220 to start. The first drive unit 220 drives the baffle 210 to rotate around the axis of the receiving cavity 130 by a certain angle. As the baffle 210 rotates, the size of the cross section connecting the inlet 110 and the receiving cavity 130 changes. According to the characteristics of different sample materials, different sizes of the cross section connecting the inlet 110 and the receiving cavity 130 can be set, that is, different stopping positions of the baffle 210 can be set.

[0064] The controller activates the second drive unit 310, which drives the impeller to rotate. Under the influence of gravity, the sample material enters the feed trough 323 through the inlet 110. As the impeller rotates at a constant speed driven by the second drive unit 310, the sample material falls evenly into each feed trough 323. With the constant speed rotation of the impeller, the material in the feed trough 323 is discharged from the sample feeding device through the outlet 120 under the influence of gravity, thereby achieving uniform and quantitative feeding.

[0065] In the above process, the feeding speed of the sample feeding device is achieved by changing the rotational speed of the second driving component 310. The size of the cross-section connecting the inlet 110 and the receiving cavity 130 (i.e., the stopping position of the baffle 210) and the rotational speed of the second driving component 310 (i.e., the rotational speed of the impeller) determine the amount of sample material in the trough 323, that is, the amount of material fed on each side of the sample feeding device. Through the coordinated operation of the stopping position of the baffle 210 and the rotational speed of the impeller, quantitative and uniform feeding can be achieved. On this basis, the relative position of the trough opening of the trough 323 and the inlet 110 is detected by a position sensor, achieving a high-precision quantitative feeding effect. In addition, the continuous movement of the baffle 210 enables stepless adjustment of the feeding amount, further improving the adjustment accuracy of the feeding amount.

[0066] On the other hand, the baffle 210 can clean the inner wall of the receiving cavity 130 during rotation, and the blade 322 can clean the inner wall of the receiving cavity 130 during rotation. It can also clean the baffle 210 and the scraping part 3222, reducing the probability of sample material accumulating on the inner wall of the receiving cavity 130 and the scraping part 3222. This achieves the effect of online cleaning without stopping the machine or disassembling the equipment. At the same time, it also reduces the risk of material blockage in the sample feeding device, greatly improves the continuous operation capability and feeding efficiency of the sample feeding device, and reduces the maintenance cost of the sample feeding device.

[0067] On the other hand, the torque sensor can detect the risk of material blockage in advance and take countermeasures before serious material blockage occurs in the sample feeding device. By starting the vibration mechanism, increasing the vibration of the vibration mechanism, expanding the cross-sectional area of ​​the feed inlet 110 and the receiving cavity 130, increasing the impeller speed, or rotating the baffle 210 360°, the blockage is dispersed, turning passive handling into active prevention, and ensuring the continuity and stability of the sample feeding device.

[0068] It should be noted that in practical applications, the baffle 210 can also be rotated 360° around the axis of the receiving cavity 130 before stopping the machine or periodically to thoroughly clean the inner wall of the receiving cavity 130.

[0069] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A sample feeding device, characterized in that, include: The feeding box (100) is provided with an inlet (110), an outlet (120) and a receiving cavity (130). The inlet (110) and the outlet (120) are both connected to the receiving cavity (130). The sample material can enter the receiving cavity (130) through the inlet (110) and can be discharged from the receiving cavity (130) through the outlet (120). A baffle mechanism is provided, comprising a baffle (210) and a first driving member (220). The baffle (210) is attached to and movably connected to the inner wall of the receiving cavity (130). The orthographic projection area of ​​the baffle (210) on the inner wall of the receiving cavity (130) is greater than or equal to the cross-sectional area of ​​the feed inlet (110) communicating with the receiving cavity (130). The first driving member (220) is driven and connected to the baffle (210). The first driving member (220) is used to drive the baffle (210) to move on the inner wall of the receiving cavity (130). The movement trajectory of the baffle (210) covers the feed inlet (110). The baffle (210) is used to adjust the size of the cross-section communicating with the feed inlet (110) and the receiving cavity (130).

2. The sample feeding device according to claim 1, characterized in that, The receiving cavity (130) is cylindrical, and the baffle (210) is an arc-shaped plate with the same curvature as the inner wall of the receiving cavity (130). The first driving member (220) is used to drive the baffle (210) to rotate around the axis of the receiving cavity (130).

3. The sample feeding device according to claim 2, characterized in that, The sample feeding device further includes an impeller mechanism, which includes an impeller and a second drive component (310). The impeller is located within the receiving cavity (130). The inlet (110) and the outlet (120) are distributed vertically. The inlet (110) is located above the impeller, and the outlet (120) is located below the impeller. The impeller includes a base (321) and at least two blades (322). The blades (322) are connected to the base (321), and all the blades (322) extend along the base (321). 1) Circumferential distribution, with a material groove (323) formed between two adjacent blades (322). The cross-sectional area of ​​the groove opening of the material groove (323) is greater than or equal to the cross-sectional area of ​​the inlet (110) and the receiving cavity (130). The second driving member (310) is driven to be connected to the base (321). The second driving member (310) is used to drive the base (321) to rotate about the axis of the base (321) so that the groove opening of the material groove (323) points to the inlet (110) or the outlet (120).

4. The sample feeding device according to claim 3, characterized in that, The seat (321) is coaxial with the receiving cavity (130), and the side of the blade (322) away from the seat (321) is attached to and movably connected to the side of the baffle (210) away from the inner wall of the receiving cavity (130).

5. The sample feeding device according to claim 4, characterized in that, The blade (322) includes a body part (3221) and a scraping part (3222). One side of the body part (3221) is connected to the seat (321), and the other side is connected to the scraping part (3222). The scraping part (3222) is attached to and movably connected to the side of the baffle (210) away from the inner wall of the receiving cavity (130). The scraping part (3222) is attached to and movably connected to the inner wall of the receiving cavity (130). The scraping part (3222) is an elastic element or a flexible element.

6. The sample feeding device according to any one of claims 3-5, characterized in that, The blade (322) is detachably connected to the base (321).

7. The sample feeding device according to any one of claims 3-5, characterized in that, The sample feeding device also includes a vibration mechanism; The vibration mechanism includes a first vibrator (410), which is disposed on the feed box (100); And / or, the vibration mechanism includes a second vibrator (420), the feed box (100) is provided with a feed hopper (140), the feed hopper (140) is connected to the feed inlet (110), and the second vibrator (420) is disposed on the feed hopper (140).

8. The sample feeding device according to claim 7, characterized in that, The sample feeding device further includes a torque sensor and a controller. The torque sensor is used to detect the torsional torque of the impeller. Both the torque sensor and the vibration mechanism are communicatively connected to the controller. The controller can start the vibration mechanism and / or change at least one of the amplitude, frequency, and speed of the vibration mechanism.

9. The sample feeding device according to claim 8, characterized in that, The first drive unit (220) is communicatively connected to the controller, and the controller is able to start and stop the first drive unit (220); And / or, the second drive unit (310) is communicatively connected to the controller, which is capable of changing the rotational speed of the drive end of the second drive unit (310).

10. The sample feeding device according to claim 8, characterized in that, The sample feeding device also includes a position sensor, which is used to detect the relative position of the opening of the material trough (323) and the inlet (110). The position sensor is communicatively connected to the controller.

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