Material distribution device and detection system

Abstract

The utility model discloses a feed divider and detection system relates to grain detection technical field, including vacuum subassembly, valve body, discharge pipe and drive piece, vacuum subassembly includes vacuum box and vacuum pump, the vacuum box has the accommodation cavity, and the vacuum box is provided with the feed inlet and discharge port that are communicated with the accommodation cavity, the vacuum pump is communicated with the accommodation cavity, and the discharge pipe is equipped with the discharge port. The valve body is arranged at the discharging port, the discharging pipe is communicated with the discharging port and is rotationally arranged relative to the vacuum box, and the driving part is connected with the discharging pipe. The sample is discharged from the discharge port of the vacuum box to the discharge pipe, and the discharge pipe can discharge the sample into the detection device. When a non-target sample is sucked into the vacuum box, the valve body is controlled to close the discharging port, the discharging direction of the discharging pipe is adjusted through the driving part, then the valve body is controlled to open the discharging port, and the non-target sample can be discharged into the granary again. By means of the arrangement, sample screening can be completed, non-target samples are prevented from being discharged into the detection device, the detection frequency is reduced, and meanwhile grain waste is avoided.

Description

Technical Field

[0001] This utility model relates to the field of grain detection technology, and in particular to a material distribution device and detection system. Background Technology

[0002] During storage, the quality of grain is affected by various factors, such as temperature, humidity, and storage time. The quality of grain in a grain silo, especially the surface layer, often differs from that of the grain inside. Therefore, by inserting sampling tubes into different depths and locations within the grain silo to obtain more representative samples, thus more accurately reflecting the overall quality of the grain in the silo.

[0003] The grain in the granary is piled up so deep that when conducting quality inspections of the deep grain, a large amount of grain needs to be sucked up from top to bottom for testing. This not only increases the complexity and time consumption of the testing work, but may also lead to waste of grain. Utility Model Content

[0004] In view of the shortcomings of the above-mentioned related technologies, this application provides a material dispensing device and a detection system to solve the above-mentioned technical problems.

[0005] This application provides a material dispensing device, including a vacuum assembly, a regulating valve, a discharge pipe, and a driving component. The vacuum assembly includes a vacuum chamber and a vacuum pump. The vacuum chamber has a receiving cavity, and the vacuum chamber has an inlet and an outlet connected to the receiving cavity. The vacuum pump is connected to the receiving cavity and is used to provide power for transporting the sample to the inlet. The regulating valve is located at the outlet. The discharge pipe is connected to the outlet and is rotatably arranged relative to the vacuum chamber. The driving component is connected to the discharge pipe and is used to drive the discharge pipe to rotate, thereby adjusting the discharge direction of the discharge pipe.

[0006] In one embodiment of this application, the discharge pipe includes a first section, a curved section, and a second section connected in sequence. The first section is connected to the discharge port and to the driving member. The axial direction of the second section intersects the rotation axis of the driving member. The driving member is used to adjust the orientation of the second section.

[0007] In one embodiment of this application, the end of the first segment away from the second segment is provided with an outwardly protruding connecting portion, the connecting portion being distributed circumferentially along the first segment, the drive shaft of the drive member is provided with a drive plate, the drive plate being disposed opposite to the connecting portion, and the material dispensing device further includes a plurality of connecting rods, the plurality of connecting rods being connected between the drive plate and the drive shaft of the connecting portion.

[0008] In one embodiment of this application, a plurality of the connecting rods are distributed circumferentially along the connecting portion, and a gap region for the discharge pipe to pass through is formed between at least two adjacent connecting rods along the circumferential direction of the connecting portion.

[0009] In one embodiment of this application, two circumferentially adjacent connecting rods are distributed in the same radial direction of the connecting portion.

[0010] In one embodiment of this application, the material distribution device further includes a drive motor, the regulating valve includes a valve body and a valve core, the valve body is connected between the discharge port and the discharge pipe, the valve core is movably disposed within the valve body, and the drive motor is drivenly connected to the valve core.

[0011] In one embodiment of this application, the valve core includes a valve plate, a seal, and a pressure plate. The valve plate is connected to the drive motor, the seal is located between the valve plate and the pressure plate, and the valve plate and the pressure plate are threaded together.

[0012] In one embodiment of this application, the drive motor includes a drive shaft having a plane, the valve plate is connected to the drive shaft, and the surface of the valve plate away from the pressure plate abuts against the plane.

[0013] In one embodiment of this application, the vacuum pump is detachably connected to the top of the vacuum chamber, the vacuum chamber further includes a discharge hopper, the discharge hopper is disposed at the bottom of the vacuum chamber and communicates with the receiving cavity, and the discharge port is opened at the bottom of the discharge hopper;

[0014] And / or, the vacuum chamber is equipped with a pressure sensor, which is used to obtain the pressure value of the containment cavity.

[0015] To achieve the above and other related objectives, this application provides a detection system, including the aforementioned dispensing device.

[0016] The technical solution adopted in this utility model achieves the following beneficial effects: A vacuum pump provides power to transport the sample into the vacuum chamber. The sample is discharged from the outlet of the vacuum chamber to the discharge pipe, which discharges the sample into the detection device for subsequent testing. When a non-target sample is drawn into the vacuum chamber, the control valve closes the outlet, and the discharge direction of the discharge pipe is adjusted by the drive component. Then, the control valve is opened again to discharge the non-target sample back into the grain silo. This setup can complete sample screening, prevent non-target samples from entering the detection device, reduce the number of tests, reduce the complexity and time consumption of the testing work, and also avoid grain waste. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a material dispensing device shown in an exemplary embodiment of this application;

[0019] Figure 2 It is along Figure 1 A sectional view of line AA in the diagram;

[0020] Figure 3 This is a schematic diagram of the drive motor and valve core shown in an exemplary embodiment of this application;

[0021] Figure 4 It is along Figure 3 A sectional view of the BB line in the middle;

[0022] Figure 5 This is a schematic diagram of the structure of the discharge pipe and the drive component shown in an exemplary embodiment of this application;

[0023] Figure 6 It is along Figure 5 A cross-sectional view of the CC line in the diagram;

[0024] Figure 7 This is a schematic diagram illustrating the structure of a detection system according to an exemplary embodiment of this application.

[0025] In the diagram: 1. Detection system; 100. Material distribution device; 110. Vacuum assembly; 111. Vacuum chamber; 112. Vacuum pump; 113. Receiving cavity; 113a. Inlet; 113b. Outlet; 114. Hopper; 115. Pressure sensor; 120. Regulating valve; 121. Valve body; 1211. First sensor; 122. Valve core; 1221. Valve plate; 1222. Seal; 1223. Pressure plate; 1224. 130. Through hole; 131. Discharge pipe; 132. First section; 133. Connecting part; 134. Bending section; 135. Second section; 146. First end; 147. Second end; 148. Driving component; 149. Driving plate; 140. Second sensor; 150. Driving motor; 151. Driving shaft; 160. Connecting rod; 161. First connecting rod; 162. Second connecting rod; 163. Third connecting rod; 200. Detection device. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0028] In the various embodiments of this application, "near end" and "far end" refer to the distance of each component from the user in the usage environment. The end closer to the user is designated as the "near end", and the end farther from the user is designated as the "far end".

[0029] This application provides a material dispensing device 100. Please refer to [link / reference]. Figure 1 The material distribution device 100 may include a vacuum component 110, a regulating valve 120, a discharge pipe 130, and a drive component 140. The vacuum component 110 is connected to the discharge pipe 130, the drive component 140 is connected to the discharge pipe 130, and the regulating valve 120 is disposed in the vacuum component 110.

[0030] The vacuum assembly 110 may include a vacuum chamber 111 and a vacuum pump 112, with the vacuum chamber 111 and the vacuum pump 112 being interconnected.

[0031] Please see Figure 2The vacuum chamber 111 has a receiving cavity 113, which can hold samples for subsequent transfer and detection. The vacuum chamber 111 has an inlet 113a and an outlet 113b, and the receiving cavity 113 is interconnected with both the inlet 113a and the outlet 113b. The inlet 113a can be located on the top or side of the vacuum chamber 111, and the outlet 113b can be located at the bottom of the vacuum chamber 111, facilitating sample flow. The inlet 113a is connected to a sample tube (not shown). A vacuum pump 112 is connected to the receiving cavity 113 and provides the power to transport the sample to the inlet 113a. When the vacuum pump 112 operates, a negative pressure is generated inside the vacuum chamber 111. Under this negative pressure, the sample in the sample tube is transported to the receiving cavity 113.

[0032] In other cases, the vacuum chamber 111 may be connected to the sampling tube by other devices, including but not limited to feeding devices, sampling devices, etc., which are not limited in this embodiment.

[0033] In a more specific embodiment, the vacuum pump 112 is detachably connected to the top of the vacuum chamber 111. The sample gathers at the bottom of the vacuum chamber 111 under its own gravity. The arrangement of the vacuum pump 112 at the top of the vacuum chamber 111 can prevent the sample from blocking the vacuum pump 112, which can enable the vacuum pump 112 to work normally.

[0034] Meanwhile, please continue to refer to Figure 2 The vacuum chamber 111 may also include a hopper 114. For example, the hopper 114 may consist of multiple inclined plates, and can collect and transfer samples falling from the inlet 113a. The hopper 114 is located at the bottom of the vacuum chamber 111 and communicates with the receiving cavity 113, with an outlet 113b located at the bottom of the hopper 114. The hopper 114 helps to collect samples, reducing sample waste and facilitating batch testing and storage of samples.

[0035] To improve the safety of the vacuum assembly 110, the vacuum chamber 111 in this embodiment is equipped with a pressure sensor 115, which is used to acquire the pressure value of the receiving cavity 113. The pressure sensor 115 can acquire the pressure value inside the receiving cavity 113 in real time, avoiding excessive pressure in the vacuum chamber 111 due to sample blockage or other situations, thus ensuring the safety of the dispensing device 100.

[0036] In other cases, pressure sensor 115 may also be electrically connected to a control terminal (not shown) and / or vacuum pump 112, etc. For example, when the pressure inside vacuum chamber 111 is too high, pressure sensor 115 may transmit a signal to the control terminal and simultaneously power off vacuum pump 112. The control terminal may then emit audible or visual signals to alert nearby personnel.

[0037] In this embodiment, please refer to Figure 1 The regulating valve 120 can be an electrically controlled regulating valve or a manual / electric integrated regulating valve, etc. The regulating valve 120 is located at the discharge port 113b and can be used to close or open the discharge port 113b. For example, when samples in the vacuum chamber 111 need to be tested in batches, the regulating valve 120 can be repeatedly opened and closed to divide the samples into multiple batches. This setting allows for reasonable control of samples within the vacuum chamber 111, preventing sample leakage that could affect current sample testing.

[0038] For details, please refer to the following: Figure 2 as well as Figure 3 The dispensing device 100 may also include a drive motor 150, which may be a stepper motor, servo motor, etc. This embodiment does not limit the type of drive motor 150. The regulating valve 120 may include a valve body 121 and a valve core 122, which cooperate with each other. The valve body 121 is connected between the outlet 113b and the discharge pipe 130, and the valve body 121 may surround the outlet 113b and the discharge pipe 130. The valve body 121 can improve the connection effect between the outlet 113b and the discharge pipe 130, preventing sample leakage from the gap between the outlet 113b and the discharge pipe 130. The valve core 122 is movably disposed within the valve body 121, during which time the valve core 122 can adjust the flow rate of the sample within the regulating valve 120. The drive motor 150 is connected to the valve core 122. Under the drive of the drive motor 150, the valve core 122 can selectively close or open the valve body 121, thereby completing the opening or closing of the feed port 113a.

[0039] To reduce sample waste and improve sample detection accuracy, please refer to [the relevant documentation / reference]. Figure 3 as well as Figure 4In this embodiment, the valve core 122 may include a valve plate 1221, a sealing element 1222, and a pressure plate 1223. The valve plate 1221 and pressure plate 1223 may be plate-shaped structures, and the dimensions of the valve plate 1221 correspond to the discharge port 113b. The valve plate 1221 is connected to a drive motor 150, and under the drive of the drive motor 150, the valve plate 1221 rotates relative to the valve body 121. The sealing element 1222 is located between the valve plate 1221 and the pressure plate 1223, and the valve plate 1221 and the pressure plate 1223 are threaded together. More specifically, the sealing element 1222, the valve body 121, and the pressure plate 1223 are all provided with through holes 1224, and threaded parts can be inserted into the through holes 1224 to pre-tighten the sealing element 1222 between the valve plate 1221 and the pressure plate 1223. Furthermore, the diameter of the seal 1222 is larger than that of the pressure plate 1223, and the edge of the seal 1222 extends beyond the pressure plate 1223. The valve plate 1221 is driven to abut against the outlet 113b, and the seal 1222 can abut against the inner wall of the outlet 113b to prevent the sample from falling through the gap between the outlet 113b and the valve plate 1221. This arrangement can prevent the seal 1222 from falling off and affecting subsequent sample testing, and also improves the rotation effect of the valve core 122.

[0040] In addition, please continue to refer to Figure 4 The drive motor 150 may include a drive shaft 151, which has a plane. A valve plate 1221 is connected to the drive shaft 151, and the surface of the valve plate 1221 away from the pressure plate 1223 abuts against the plane. The plane arrangement improves the connection between the valve plate 1221 and the drive shaft 151, and enhances the driving effect of the drive motor 150 on the valve plate 1221.

[0041] Preferably, the valve body 121 is equipped with a first sensor 1211, which can acquire the relative position of the valve body 121 and the valve core 122, and thus determine the on / off state of the valve core 122. This arrangement can improve the detection of the working state of the valve core 122, thereby improving the sample dispensing effect. Furthermore, there can be multiple first sensors 1211, allowing the dispensing device 100 to more accurately detect the on / off state of the valve core 122.

[0042] In this embodiment, please refer to Figure 1 as well as Figure 2The discharge pipe 130 can be a tubular structure, and this embodiment is not limited to this. The discharge pipe 130 is connected to the discharge port 113b, and the discharge pipe 130 can be rotatably arranged relative to the vacuum chamber 111. In other words, the discharge pipe 130 has a first end 134 and a second end 135 that are far apart from each other. The first end 134 can be connected to the discharge port 113b and can be used to receive the sample discharged from the discharge port 113b. Furthermore, the first end 134 can extend into the valve body 121, and the valve core 122 can control a certain amount of sample to be discharged into the discharge pipe 130. The second end 135 can be used to discharge the sample, and the second end 135 can be rotatably arranged relative to the vacuum chamber 111. At the same time, the discharge direction of the discharge pipe 130 changes accordingly.

[0043] The driving component 140 can be a motor, cylinder, hydraulic cylinder, etc., and this embodiment is not limited to any particular type. The driving component 140 is connected to the discharge pipe 130 and can drive the discharge pipe 130 to rotate, thereby adjusting the discharge direction of the discharge pipe 130. The driving component 140 can change the orientation of the second end 135 of the discharge pipe 130, that is, change the discharge direction of the discharge pipe 130. This setup can return non-target samples back into the grain silo, or allow samples to be tested to be discharged into the testing device 200 for testing. This setup can complete sample screening, prevent non-target samples from being discharged into the testing device 200, reduce the number of tests, reduce the complexity and time consumption of the testing work, and also avoid grain waste.

[0044] In a more specific implementation, please refer to [link / reference needed]. Figure 2 The discharge pipe 130 may include a first section 131, a curved section 132, and a second section 133 connected sequentially. In other words, the curved section 132 connects the first section 131 and the second section 133. The first section 131 is connected to the discharge port 113b, that is, the first end 134 may be formed at the end of the first section 131 away from the curved section 132, and the second end 135 may be formed at the end of the second end 135 away from the curved section 132. The first section 131 is connected to the drive member 140, and the first section 131 is rotatably disposed relative to the vacuum chamber 111. The axial direction of the second section 133 intersects the rotation axis of the drive member 140, which is used to adjust the orientation of the second section 133. The drive member 140 drives the first section 131 to rotate, and the second section 133 and the curved section 132 rotate together. The relative position of the second end 135 of the second section 133 changes, and the discharge direction of the discharge pipe 130 changes accordingly. The setting of the curved section 132 can form an angle between the first section 131 and the second section 133. The first section 131 is driven to rotate around its own axis, and the orientation of the second end 135 of the second section 133 can be greatly changed, thereby increasing the discharge range of the discharge pipe 130.

[0045] Please refer to the following: Figure 1 as well as Figure 5The first segment 131 has an outwardly protruding connecting portion 1311 at its end furthest from the second segment 133, and the connecting portion 1311 is distributed circumferentially along the first segment 131. In other words, the connecting portion 1311 can be a ring structure, and the inner wall of the connecting portion 1311 is connected to the outer wall of the first segment 131. The drive shaft of the drive member 140 is provided with a drive plate 141, which is disposed opposite to the connecting portion 1311. The dispensing device 100 also includes a plurality of connecting rods 160, which are connected between the drive plate 141 and the drive shaft of the connecting portion 1311. The plurality of connecting rods 160 can improve the connection stability between the discharge pipe 130 and the drive member 140, and the drive member 140 can stably drive its rotation, ensuring the safety of the dispensing device.

[0046] In one implementation, please continue reading Figure 5 Multiple connecting rods 160 are distributed circumferentially along the connecting portion 1311, and a gap area is formed between at least two adjacent connecting rods 160 for the discharge pipe 130 to pass through. This gap area provides a smooth and unobstructed path for the discharge pipe 130, facilitating bending. This arrangement ensures that the discharge pipe 130 can easily and smoothly pass through the space between the connecting rods 160 without any obstruction or interference, thus making the discharge process of the discharge pipe 130 more efficient and smoother.

[0047] Preferably, two circumferentially adjacent connecting rods 160 are distributed in the same radial direction of the connecting part 1311, and the width of the gap area can be equal to the diameter of the connecting part 1311. This arrangement can maximize the area of ​​the gap area, increase the aperture size of the discharge pipe 130, and further make the discharge process of the discharge pipe 130 more efficient and smooth.

[0048] More specifically, please refer to Figure 5 as well as Figure 6The multiple connecting rods 160 may include a first connecting rod 161, a second connecting rod 162, and a third connecting rod 163, which are arranged side by side between the drive plate 141 and the connecting portion 1311. The first connecting rod 161 and the second connecting rod 162 are located at opposite ends of the same diameter of the first segment 131 and are arranged opposite each other. The third connecting rod 163 is located on one side of the line connecting the first connecting rod 161 and the second connecting rod 162. The third connecting rod 163 improves the connection effect between the drive plate 141 and the connecting portion 1311 and avoids wobbling between the drive plate 141 and the connecting portion 1311. One end of the bent segment 132 is located between the first connecting rod 161 and the second connecting rod 162, and the other end extends away from the third connecting rod 163 and connects to the second segment 133. The bending section 132 allows at least a portion of the bending section 132 and the second end 135 to extend between the first connecting rod 161 and the second connecting rod 162, which can increase the diameter of the discharge pipe 130 and increase its overall diameter. This increases the flow rate of the sample within the discharge pipe 130, thereby increasing the discharge rate of the dispensing device 100 and improving its working efficiency.

[0049] For a better option, please refer to the following: Figure 1 The drive unit 140 is equipped with a second sensor 142, which can detect the relative position between the discharge pipe 130 and the drive unit 140. In other words, the drive unit 140 drives the discharge pipe 130 to rotate relative to it, and the second sensor 142 can obtain the position of the discharge pipe 130 in real time to prevent the discharge pipe 130 from rotating excessively.

[0050] Please see Figure 7 This embodiment illustrates a detection system 1, which may include a detection device 200 and the aforementioned dispensing device 100. The dispensing device 100 and the detection device 200 are arranged opposite to each other, and the vacuum component 110 of the dispensing device 100 can pick up samples. When the sample in the vacuum chamber 111 is the target sample, the dispensing device 100 discharges the sample into the detection area of ​​the detection device 200 for subsequent detection. When the sample in the vacuum chamber 111 is not the target sample, the valve body 121 closes the outlet 113b of the vacuum chamber 111, and the discharge direction of the discharge pipe 130 is adjusted by the drive component 140. Then, the valve body 121 is controlled to open the outlet 113b, so that the non-target sample can be discharged back into the grain bin.

[0051] The material distribution device 100 and detection system 1 provided in this embodiment utilize a vacuum pump 112 to power the sample delivery into a vacuum chamber 111. The sample is discharged from the outlet 113b of the vacuum chamber 111 into a discharge pipe 130, which discharges the sample into the detection device 200 for subsequent testing. When a non-target sample is detected in the vacuum chamber 111, the control valve 120 closes the outlet 113b, and the drive component 140 adjusts the discharge direction of the discharge pipe 130. Then, the control valve 120 reopens the outlet 113b, allowing the non-target sample to be returned to the grain silo. This setup effectively filters samples, prevents non-target samples from entering the detection device 200, reduces the number of tests, lowers the complexity and time consumption of the testing process, and avoids grain waste.

[0052] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0053] Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

[0054] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A material dispensing device, characterized in that, include: A vacuum assembly, comprising a vacuum chamber and a vacuum pump, wherein the vacuum chamber has a receiving cavity, and the vacuum chamber has an inlet and an outlet communicating with the receiving cavity; the vacuum pump is connected to the receiving cavity and is used to provide power for transporting the sample to the inlet. A regulating valve is located at the discharge port; A discharge pipe, which is connected to the discharge port and is rotatably arranged relative to the vacuum box; A driving component is connected to the discharge pipe and is used to drive the discharge pipe to rotate in order to adjust the discharge direction of the discharge pipe.

2. The material dispensing device according to claim 1, characterized in that, The discharge pipe includes a first section, a curved section, and a second section connected in sequence. The first section is connected to the discharge port and to the driving component. The axial direction of the second section intersects the rotation axis of the driving component. The driving component is used to adjust the orientation of the second section.

3. The material dispensing device according to claim 2, characterized in that, The first segment has an outwardly protruding connecting portion at the end furthest from the second segment. The connecting portion is distributed circumferentially along the first segment. The drive shaft of the drive member is provided with a drive plate, which is disposed opposite to the connecting portion. The material distribution device also includes multiple connecting rods, which are connected between the drive plate and the drive shaft of the connecting portion.

4. The material dispensing device according to claim 3, characterized in that, The plurality of connecting rods are distributed circumferentially along the connecting portion, and a gap area is formed between at least two adjacent connecting rods along the circumferential direction of the connecting portion for the discharge pipe to pass through.

5. The material dispensing device according to claim 4, characterized in that, Two circumferentially adjacent connecting rods are distributed in the same radial direction of the connection.

6. The material dispensing device according to claim 1, characterized in that, The material distribution device also includes a drive motor, and the regulating valve includes a valve body and a valve core. The valve body is connected between the discharge port and the discharge pipe, and the valve core is movably disposed within the valve body. The drive motor is driven by the valve core.

7. The material dispensing device according to claim 6, characterized in that, The valve core includes a valve plate, a seal, and a pressure plate. The valve plate is connected to the drive motor. The seal is located between the valve plate and the pressure plate. The valve plate and the pressure plate are threaded together.

8. The material dispensing device according to claim 7, characterized in that, The drive motor includes a drive shaft having a plane, the valve plate is connected to the drive shaft, and the surface of the valve plate away from the pressure plate abuts against the plane.

9. The material dispensing device according to claim 1, characterized in that, The vacuum pump is detachably connected to the top of the vacuum chamber. The vacuum chamber also includes a discharge hopper, which is located at the bottom of the vacuum chamber and communicates with the receiving cavity. The discharge port is located at the bottom of the discharge hopper. And / or, the vacuum chamber is equipped with a pressure sensor, which is used to obtain the pressure value of the containment cavity.

10. A detection system, characterized in that, Includes the material dispensing device as described in any one of claims 1-9.

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