Vacuum sampling device and bag breaking system

Abstract

The utility model provides vacuum sampling device and bag breaking system. Vacuum sampling device includes sampling pipe, sealing mechanism and vacuum generator. Sampling pipe includes the main pipe body of axial both ends through, the first end of main pipe body can be sealed fixed in the lateral wall of bunker, the lateral wall is equipped with first sampling hole, the outer peripheral wall of main pipe body is equipped with the air extraction hole and the sample hole near the first end, sealing mechanism sets up in the second end of main pipe body and seals the port of second end, sealing mechanism can block first sampling hole or open first sampling hole, vacuum generator is located in the outside of main pipe body, the air inlet of vacuum generator is connected in the air extraction hole, sealing mechanism, lateral wall and main pipe body between the enclosure form a sampling cavity, first sampling hole, air extraction hole, sample hole links to each other sampling cavity respectively, sample hole can be sealedly connected in sampling container, vacuum generator can extract the gas in sampling cavity to make sampling cavity form vacuum environment. The vacuum sampling device is applied to the sampling of bag breaking system, and material will not be contaminated.

Description

Technical Field

[0001] This utility model relates to the field of sampling technology, and in particular to a vacuum sampling device and a bag breaking system. Background Technology

[0002] In bag-breaking systems used in the lithium battery industry, samplers are typically installed. These samplers are inserted into devices containing materials, such as hoppers or discharge pipes, to take samples. However, during the sampling process, the sampler may come into frictional contact with the material inside the device, which can easily introduce magnetic foreign objects and cause material contamination. Utility Model Content

[0003] This invention aims to solve at least one of the problems existing in the prior art. To this end, this invention provides a vacuum sampling device and a bag-breaking system. The vacuum sampling device uses negative pressure for sampling, and when applied to the bag-breaking system, it prevents contamination of the material during sampling, thereby ensuring the normal use of the material.

[0004] To achieve the above objectives, on the one hand, this utility model provides a vacuum sampling device, comprising:

[0005] The sampling tube includes a main body extending through both ends in the axial direction. The first end of the main body is configured to be sealably fixed to the side wall of the silo. The side wall is provided with a first sampling hole. The outer peripheral wall of the main body near the first end is provided with an air extraction hole and a sample outlet hole.

[0006] A sealing mechanism, disposed at the second end of the main body and sealing the port at the second end of the main body, the sealing mechanism being configured to either block or open the first sampling port; and

[0007] A vacuum generator is disposed on the outside of the main body, and the air inlet of the vacuum generator is connected to the air extraction port;

[0008] The sealing mechanism, the side wall, and the main body enclose a sampling chamber. The first sampling hole, the evacuation hole, and the sampling outlet hole are respectively connected to the sampling chamber. The sampling outlet hole is configured to be sealably connected to the sampling container. The vacuum generator is configured to extract gas from the sampling chamber to create a vacuum environment in the sampling chamber.

[0009] In one embodiment, the vacuum sampling device further includes:

[0010] A mounting plate is configured to be sealably disposed on the side wall. The mounting plate has a second sampling hole that communicates with the first sampling hole. The main body is sealed and fixed to the side wall by the mounting plate.

[0011] The sealing mechanism includes a plug whose shape is adapted to the shape of the second sampling orifice, and the plug is configured to block the second sampling orifice, thereby blocking the first sampling orifice.

[0012] In one embodiment, the plug is a plug made of a non-metallic material, and / or the mounting plate is a mounting plate made of a non-metallic material.

[0013] In one embodiment, the outer peripheral wall of the plug is provided with a magnetic shielding layer, and / or the inner peripheral wall of the second sampling hole is provided with a magnetic shielding layer.

[0014] In one embodiment, the sealing mechanism includes a cylinder body and a piston rod inserted into the cylinder body. The piston rod is configured to move axially along the main body under the drive of the cylinder body. A plug is provided at one end of the piston rod away from the cylinder body, and the plug is configured to block the first sampling hole.

[0015] In one embodiment, the sampling tube further includes a first branch tube disposed on the outer peripheral wall of the main tube, the first branch tube extending in a vertical direction or substantially in a vertical direction;

[0016] Wherein, one end of the first branch tube is sealed and connected to the sample outlet of the main tube, and the other end of the first branch tube is configured to be detachably connected to the sampling container.

[0017] In one embodiment, the vacuum sampling device further includes a sampling bottle, the bottle opening of which is provided with a first quick-release structure, and the other end of the first branch tube is provided with a second quick-release structure. The first quick-release structure and the second quick-release structure are adapted to detachably connect the sampling bottle to the other end of the first branch tube.

[0018] In one embodiment, the sampling tube further includes a second branch tube disposed on the outer peripheral wall of the main body, the second branch tube and the first branch tube being distributed circumferentially around the main body; one end of the second branch tube is sealed and connected to the air extraction port of the main body, and the other end of the second branch tube is configured to be detachably connected to the vacuum generator;

[0019] The second branch pipe is provided with a first control valve and a purge inlet located between the suction port and the vacuum generator. The purge inlet is located between the first control valve and the vacuum generator. The first control valve is configured to control the opening and closing of the gas path between the suction port and the vacuum generator. The purge inlet is configured to be connected to an external gas source to blow gas toward the sampling chamber.

[0020] In one embodiment, the outlet of the vacuum generator is connected to the inner cavity of the hopper via a pipeline, and the hopper and / or the pipeline are provided with a second control valve, which is configured to control the opening and closing of the air passage between the outlet of the vacuum generator and the inner cavity of the hopper.

[0021] On the other hand, this utility model provides a bag breaking system, including a bag breaking chamber and a vacuum sampling device as described in any of the above embodiments. The bag breaking chamber includes a hopper, and the vacuum sampling device is installed on the side wall of the hopper.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows: In the vacuum sampling device and bag breaking system provided by this utility model, the vacuum sampling device adopts vacuum negative pressure sampling, which will not cause contamination to the material when applied to the bag breaking system for sampling, thereby ensuring the normal use of the material; furthermore, compared with traditional samplers, the sampling process of the vacuum sampling device is fully automated and has high control precision. It can not only realize intermittent or continuous sampling as needed, but also adjust the sampling speed by adjusting the vacuum degree, thereby meeting different sampling needs in different application scenarios.

[0023] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a three-dimensional structural diagram of a vacuum sampling device installed on the side wall of a silo, according to one embodiment of the present invention.

[0026] Explanation of key figure labels:

[0027] 1000-Vacuum sampling device; 2000-Hopper; 2100-Second control valve; 1-Sampling tube; 12-Main body; 121-Ejection port; 123-Sampling outlet; 14-Sampling chamber; 16-First branch tube; 162-Second quick-release structure; 18-Second branch tube; 182-First control valve; 184-Purge inlet; 2-Sealing mechanism; 21-Cylinder body; 23-Piston rod; 232-Plug; 3-Vacuum generator; 4-Mounting plate; 42-Second sampling port; 5-Sampling bottle; 51-First quick-release structure.

[0028] The following detailed description, in conjunction with the accompanying drawings, further illustrates this utility model. Detailed Implementation

[0029] 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.

[0030] It should be noted that in the description of this utility model, the terms "first," "second," etc., are used to distinguish different objects, not to describe a specific order, and the term "multiple" refers to at least two, and therefore should not be construed as a limitation on this application. Furthermore, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through other elements, or a connection within two elements; it can be a communication connection or an electrical connection, where both communication and electrical connections include direct connections or indirect connections through other elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] Please see Figure 1 This utility model provides a vacuum sampling device 1000, including a sampling tube 1, a sealing mechanism 2, and a vacuum generator 3. The sampling tube 1 includes a main tube 12 extending through both axial ends. The first end of the main tube 12 is configured to be sealably fixed to the side wall of a hopper 2000, and this side wall has a first sampling hole (not shown). An air extraction hole 121 and a sample outlet hole 123 are provided on the outer peripheral wall of the main tube 12 near the first end. The sealing mechanism 2 is disposed at the second end of the main tube 12 and seals the port of the second end of the main tube 12. The sealing mechanism 2 is configured to either block or open the first sampling hole. The vacuum generator 3 is disposed on the outside of the main tube 12, and the air inlet of the vacuum generator 3 is connected to the air extraction hole 121.

[0032] like Figure 1 As shown, in an embodiment of this utility model, a sampling chamber 14 is formed by the sealing mechanism 2, the side wall of the hopper 2000, and the main body 12. The first sampling hole, the air extraction hole 121, and the sampling outlet 123 are respectively connected to the sampling chamber 14. It should be noted that the opening of the sampling outlet 123 is at least partially vertically downward and is configured to be sealably connected to the sampling container (such as...). Figure 1The sampling bottle 5 shown); the vacuum generator 3 is configured to extract gas from the sampling chamber 14 to create a vacuum environment in the sampling chamber 14. Specifically, when the sealing mechanism 2 blocks the first sampling hole on the side wall of the hopper 2000 and the sampling outlet 123 is sealed to the sampling container, the vacuum generator 3 can extract gas from the sampling chamber 14, thereby creating a vacuum environment in the sampling chamber 14. It is easy to understand that after the sampling chamber 14 creates a vacuum environment, controlling the vacuum generator 3 to stop working and controlling the sealing mechanism 2 to open the first sampling hole allows the material in the hopper 2000 to enter the sampling container through the connected first sampling hole, sampling chamber 14, and sampling outlet 123 under the vacuum negative pressure of the sampling chamber 14, thereby completing the sampling operation of the material in the hopper 2000.

[0033] In summary, the vacuum sampling device 1000 provided in this embodiment of the present invention adopts vacuum negative pressure sampling, which will not cause contamination to the material during sampling, thereby ensuring the normal use of the material. Furthermore, compared with traditional samplers, the sampling process of the vacuum sampling device 1000 is fully automated and has high control precision. By controlling the working state of the sealing mechanism 2 and the vacuum generator 3, not only can intermittent or continuous sampling be achieved as needed, but the sampling speed can also be adjusted by adjusting the vacuum degree of the sampling chamber 14, thereby meeting different sampling needs in different application scenarios and effectively improving sampling efficiency.

[0034] Preferably, such as Figure 1 As shown, in one embodiment of this utility model, the vacuum sampling device 1000 further includes a mounting plate 4. The mounting plate 4 is configured to be sealably disposed on the side wall of the hopper 2000, and the mounting plate 4 has a second sampling hole 42 communicating with the first sampling hole. The first end of the main pipe 12 is sealed and fixed to the side wall of the hopper 2000 by the mounting plate 4. In this embodiment, by sealing and fixing the first end of the main pipe 12 to the side wall of the hopper 2000 by the mounting plate 4, the mounting plate 4 can act as a reinforcing plate for the side wall of the hopper 2000, which helps to prevent the side wall of the hopper 2000 from deforming due to the installation of the sampling tube 1. Furthermore, the contact area between the mounting plate 4 and the side wall of the hopper 2000 can be set to be larger than the contact area between the first end of the main pipe 12 and the side wall of the hopper 2000, which also helps to improve the connection reliability between the sampling tube 1 and the side wall of the hopper 2000. The main pipe 12 is not limited to being fixedly connected to the mounting plate 4 by means of bonding, bolting or other methods. Similarly, the mounting plate 4 is not limited to being fixedly connected to the side wall of the hopper 2000 by means of bonding, bolting or other methods. As long as the connection between the main pipe 12 and the mounting plate 4 is sealed and the connection between the mounting plate 4 and the side wall of the hopper 2000 is sealed, the sealing can be achieved by existing sealing technologies, such as, but not limited to, sealing by sealant or sealing rings. These will not be elaborated further.

[0035] Of course, in other embodiments of this utility model, the first end of the main body 12 can also be directly sealed and fixed to the side wall of the silo 2000 by means of bonding or bolt connection, thereby eliminating the installation plate 4 and simplifying the structure and installation steps of the vacuum sampling device 1000. This will not be limited or elaborated.

[0036] Optionally, the axis of the main body 12 may be perpendicular to the mounting plate 4 or not, but preferably perpendicular to the mounting plate 4, which helps to reduce the difficulty of installing the main body 12 on the mounting plate 4.

[0037] It should be noted that, in Figure 1 In the example, the sealing mechanism 2 includes a plug 232, the shape of which is adapted to the shape of the second sampling hole 42. The plug 232 is configured to block the second sampling hole 42, thereby blocking the first sampling hole connected to the second sampling hole 42. Optionally, in one possible implementation, the plug 232 is made of a non-metallic material, and / or the mounting plate 4 is made of a non-metallic material. In this way, during the process of the plug 232 blocking the second sampling hole 42, no magnetic foreign matter is generated when the plug 232 rubs against the inner peripheral wall of the second sampling hole 42, thus preventing magnetic foreign matter from entering the silo 2000 through the connected second sampling hole 42 and the first sampling hole, and avoiding contamination of the material in the silo 2000. The non-metallic material used to make the plug 232 is preferably an elastic material such as rubber or silicone, which allows the plug 232 to undergo elastic deformation, thereby improving the sealing effect of the plug 232 on the second sampling hole 42; the non-metallic material used to make the mounting plate 4 can be a plastic with high structural strength.

[0038] In another possible implementation, the outer peripheral wall of the plug 232 is provided with a magnetic shielding layer, and / or the inner peripheral wall of the second sampling hole 42 is provided with a magnetic shielding layer. By providing a magnetic shielding layer, it is also possible to prevent the plug 232 from rubbing against the inner peripheral wall of the second sampling hole 42 and generating magnetic foreign matter, thereby avoiding contamination of the material in the silo 2000. The magnetic shielding layer can be formed by applying a magnetic shielding coating, but is not limited to, using existing magnetic shielding coatings.

[0039] Please refer to it again. Figure 1In one embodiment of this utility model, the sealing mechanism 2 specifically includes a cylinder body 21 and a piston rod 23 inserted into the cylinder body 21. The piston rod 23 is configured to move axially along the main pipe body 12 under the drive of the cylinder body 21. A plug 232 is provided at the end of the piston rod 23 away from the cylinder body 21. Thus, when the piston rod 23 moves axially along the main pipe body 12 towards the mounting plate 4, it can drive the plug 232 to block the second sampling hole 42 on the mounting plate 4, thereby blocking the first sampling hole corresponding to the second sampling hole 42; when the piston rod 23 moves axially along the main pipe body 12 away from the mounting plate 4, it can drive the plug 232 to open the second sampling hole 42, thereby opening the first sampling hole. In this embodiment, the sealing mechanism 2 adopts a sealing cylinder, which has a simple structure and mature technology, and is conducive to ensuring that the plug 232 can have a good sealing effect on the second sampling hole 42 and the first sampling hole.

[0040] Optionally, the axis of the second sampling hole 42 can coincide with the axis of the main body 12, so that the plug 232 only needs to be coaxially set at the end of the piston rod 23, which is simple to set; the axis of the second sampling hole 42 can also not coincide with the axis of the main body 12, in which case the plug 232 needs to be eccentrically set at the end of the piston rod 23 to ensure that the second sampling hole 42 can be blocked.

[0041] Of course, in other embodiments of this utility model, the sealing mechanism 2 can adopt other forms of sealing mechanism, such as, but not limited to, a crank slider mechanism with a plug 232. The plug 232 is located at the end of the slider member. The slider member can also drive the plug 232 to block or open the second sampling hole 42 by moving along the axial direction of the main body 12. This will not be elaborated further.

[0042] Please refer to it again. Figure 1 In one embodiment of this utility model, the sampling tube 1 further includes a first branch tube 16 disposed on the outer peripheral wall of the main tube 12. The first branch tube 16 extends vertically or substantially vertically and one end is sealed to the sample outlet 123 of the main tube 12. The other end of the first branch tube 16 is configured to be detachably connected to the sampling container. In this embodiment, the first branch tube 16 achieves a sealed connection between the sample outlet 123 and the sampling container. Compared to directly sealing the sampling container to the sample outlet 123 of the main tube 12, the connection between the first branch tube 16 and the sampling container is more convenient and faster, and the first branch tube 16 can be adapted to different sampling containers.

[0043] Preferably, in Figure 1In the example, the first branch tube 16 and the main tube 12 are integral structures, and the sampling hole 123 is the opening at the intersection of the main tube 12 and the first branch tube 16. There is no need to open the sampling hole 123 separately or connect the first branch tube 16 and the main tube 12, which simplifies the structure and installation of the sampling tube 1. Furthermore, the integral molding of the first branch tube 16 and the main tube 12 also helps to improve the structural strength of the sampling tube 1.

[0044] exist Figure 1 In the example, the vacuum sampling device 1000 also includes a sampling bottle 5 used as a sampling container. The bottle opening of the sampling bottle 5 is provided with a first quick-release structure 51, and the other end of the first branch tube 16 is provided with a second quick-release structure 162. The first quick-release structure 51 and the second quick-release structure 162 are adapted to detachably connect the sampling bottle 5 to the other end of the first branch tube 16. The sampling bottle 5 and the first branch tube 16 are sealed together by the quick-release structure, resulting in high assembly and disassembly efficiency. The fit between the first quick-release structure 51 and the second quick-release structure 162 can adopt a quick-release combination structure in the prior art, such as, but not limited to, a clamp-type quick-release structure, which is not limited or described in detail.

[0045] Furthermore, such as Figure 1 As shown, in one embodiment of this utility model, the sampling tube 1 may further include a second branch tube 18 disposed on the outer peripheral wall of the main tube 12, with the second branch tube 18 and the first branch tube 16 spaced apart along the circumference of the main tube 12. One end of the second branch tube 18 is sealed to the evacuation port 121 of the main tube 12, and the other end is detachably connected to the vacuum generator 3. In this embodiment, similar to the aforementioned first branch tube 16, the second branch tube 18 achieves a sealed connection between the evacuation port 121 and the vacuum generator 3. Compared to directly sealing the vacuum generator 3 to the evacuation port 121 of the main tube 12, the connection between the second branch tube 18 and the vacuum generator 3 is more convenient and faster, and the second branch tube 18 can be adapted to different models of vacuum generator 3.

[0046] Preferably, in Figure 1 In the example, the second branch pipe body 18 and the main pipe body 12 are integral structures. The air extraction hole 121 is the pipe opening at the intersection of the main pipe body 12 and the second branch pipe body 18. There is no need to open an additional air extraction hole 121 or connect the second branch pipe body 18 and the main pipe body 12. This can also simplify the structure and installation of the sampling tube 1. Furthermore, the fact that the second branch pipe body 18 and the main pipe body 12 are integrally formed also helps to further improve the structural strength of the sampling tube 1.

[0047] Preferably, in Figure 1In the example, the first branch pipe 16 and the second branch pipe 18 are located on opposite sides of the main pipe 12. That is, the first branch pipe 16 is located on the lower side of the main pipe 12, while the second branch pipe 18 is located on the upper side of the main pipe 12. This ensures that during the sampling process, the material in the hopper 2000 enters the sampling chamber 14 under the action of vacuum negative pressure and then enters the first branch pipe 16 under the action of gravity, instead of entering the second branch pipe 18, thereby ensuring that the sampled material enters the sampling bottle 5.

[0048] Furthermore, in Figure 1 In the example, the second branch pipe body 18 is provided with a first control valve 182 and a purge inlet 184 located between the suction port 121 and the vacuum generator 3, and the purge inlet 184 is located between the first control valve 182 and the vacuum generator 3. The first control valve 182 is configured to control the opening and closing of the air passage between the suction port 121 and the vacuum generator 3, and the purge inlet 184 is configured to be connected to an external air source to blow gas toward the sampling chamber 14. It is easy to understand that by controlling the first control valve 182 located near the suction port 121 in the second branch pipe body 18, the air passage between the suction port 121 and the vacuum generator 3 can be controlled, that is, the connection between the suction port 121 and the second branch pipe body 18 can be controlled. Closing the first control valve 182 during the sampling process can further ensure that the material does not enter the second branch pipe body 18 during the sampling process. Furthermore, during the sampling process, by opening the first control valve 182 and blowing gas into the sampling chamber 14 of the sampling tube 1 through the purge inlet 184, the material adhering to the inner wall of the sampling tube 1 can be blown back to the hopper 2000 and the sampling bottle 5, ensuring that the material residue in the sampling tube 1 is minimized after the sampling is completed, and at the same time, it can avoid the accumulation of material on the inner wall of the sampling tube 1, which would lead to inaccurate subsequent sampling.

[0049] It is also understandable that, Figure 1 In the example, by controlling the opening or closing of the first control valve 182, the airflow direction and flow rate during the sampling process can be controlled to ensure that the sampling operation proceeds according to the predetermined procedure. Specifically, during the stage of evacuating to form a vacuum environment, opening the first control valve 182 ensures that the gas in the sampling chamber 14 flows to the vacuum generator 3; during the stage of aspirating the sample after the vacuum environment is formed, closing the first control valve 182 to cut off the air path between the sampling chamber 14 and the vacuum generator 3 ensures that the material in the hopper 2000 is smoothly drawn into the sampling bottle 5; and during the stage of purging the material, opening the first control valve 182 ensures that gas is blown into the sampling chamber 14.

[0050] Preferably, in Figure 1In this example, the outlet of the vacuum generator 3 is connected to the inner cavity of the hopper 2000 via a pipeline, and the hopper 2000 and / or the pipeline are equipped with a second control valve 2100. The second control valve 2100 is configured to control the opening and closing of the gas passage between the outlet of the vacuum generator 3 and the inner cavity of the hopper 2000. In this embodiment, by controlling the opening or closing of the second control valve 2100, the vacuum generator 3 can be controlled to allow the gas extracted during the sampling process to enter the interior of the hopper 2000 when needed, thereby ensuring the smoothness and safety of the sampling process.

[0051] Optionally, in the above embodiments, the first control valve 182 and the second control valve 2100 can be existing pneumatic control valves, and there is no limitation thereto; in addition, the second branch pipe body 18 can be provided with a filter screen on the side of the first control valve 182 away from the purge inlet 184, so as to filter the blown gas, prevent impurities from entering the sampling chamber 14, and reduce the risk of material contamination.

[0052] It should be noted that the vacuum sampling device 1000 provided in the embodiments of this utility model may also have other structures or components, such as, but not limited to, a detection switch for monitoring the vacuum degree of the sampling chamber 14, so as to effectively control the vacuum degree in the sampling chamber 14 and achieve effective adjustment of the sampling amount.

[0053] On the other hand, embodiments of this utility model provide a bag-breaking system, including a bag-breaking chamber with a hopper 2000 and a vacuum sampling device 1000 installed on the side wall of the hopper 2000. The vacuum sampling device 1000 is used to sample the material in the hopper 2000. The vacuum sampling device 1000 can be any of the vacuum sampling devices 1000 in the foregoing embodiments, and therefore possesses at least all the beneficial effects brought about by the technical solutions of the foregoing embodiments. More specific descriptions can be found in the relevant content of the foregoing embodiments, and will not be repeated here.

[0054] It is understood that, similar to existing bag-breaking systems, the bag-breaking system provided in the embodiments of this utility model may also include other devices such as bag-breaking knives, which will not be described in detail here.

[0055] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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; they can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within 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.

[0056] In the description of this specification, the references to terms such as "embodiment," "specific embodiment," and "example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0057] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A vacuum sampling device (1000), characterized in that, include: The sampling tube (1) includes a main tube (12) extending through both ends in the axial direction. The first end of the main tube (12) is configured to be sealed and fixed to the side wall of the silo (2000). The side wall is provided with a first sampling hole. The outer peripheral wall of the main tube (12) near the first end is provided with an air extraction hole (121) and a sample outlet hole (123). A sealing mechanism (2) is disposed at the second end of the main body (12) and seals the port at the second end of the main body (12). The sealing mechanism (2) is configured to either block or open the first sampling port. A vacuum generator (3) is located on the outside of the main body (12), and the air inlet of the vacuum generator (3) is connected to the air extraction port (121). The sealing mechanism (2), the side wall and the main body (12) enclose a sampling chamber (14), and the first sampling hole, the air extraction hole (121) and the sample outlet hole (123) are respectively connected to the sampling chamber (14); the sample outlet hole (123) is configured to be sealably connected to the sampling container; the vacuum generator (3) is configured to extract the gas in the sampling chamber (14) so ​​that the sampling chamber (14) forms a vacuum environment.

2. The vacuum sampling device (1000) as described in claim 1, characterized in that, Also includes: Mounting plate (4) is configured to be sealably disposed on the side wall. Mounting plate (4) has a second sampling hole (42) that communicates with the first sampling hole. The main body (12) is sealed and fixed to the side wall by mounting plate (4). The sealing mechanism (2) includes a plug (232) whose shape is adapted to the shape of the second sampling hole (42), and the plug (232) is configured to block the second sampling hole (42), thereby blocking the first sampling hole.

3. The vacuum sampling device (1000) as described in claim 2, characterized in that, The plug (232) is a plug made of non-metallic material, and / or the mounting plate (4) is a mounting plate made of non-metallic material.

4. The vacuum sampling device (1000) as described in claim 2, characterized in that, The outer peripheral wall of the plug (232) is provided with a magnetic shielding layer, and / or the inner peripheral wall of the second sampling hole (42) is provided with a magnetic shielding layer.

5. The vacuum sampling device (1000) as described in any one of claims 1 to 4, characterized in that, The sealing mechanism (2) includes a cylinder body (21) and a piston rod (23) inserted into the cylinder body (21). The piston rod (23) is configured to move axially along the main body (12) under the drive of the cylinder body (21). A plug (232) is provided at one end of the piston rod (23) away from the cylinder body (21). The plug (232) is configured to block the first sampling hole.

6. The vacuum sampling apparatus (1000) as described in any one of claims 1 to 4, characterized in that, The sampling tube (1) also includes a first branch tube (16) disposed on the outer peripheral wall of the main tube (12), the first branch tube (16) extending in a vertical direction or approximately in a vertical direction; One end of the first branch tube (16) is sealed to the sample outlet (123) of the main tube (12), and the other end of the first branch tube (16) is configured to be detachably connected to the sampling container.

7. The vacuum sampling device (1000) as described in claim 6, characterized in that, It also includes a sampling bottle (5), the bottle mouth of which is provided with a first quick-release structure (51), and the other end of the first branch tube (16) is provided with a second quick-release structure (162). The first quick-release structure (51) and the second quick-release structure (162) are adapted to detachably connect the sampling bottle (5) to the other end of the first branch tube (16).

8. The vacuum sampling device (1000) as described in claim 6, characterized in that, The sampling tube (1) further includes a second branch tube (18) disposed on the outer peripheral wall of the main body (12). The second branch tube (18) and the first branch tube (16) are distributed circumferentially on the main body (12). One end of the second branch tube (18) is sealed and connected to the air extraction hole (121) of the main body (12), and the other end of the second branch tube (18) is configured to be detachably connected to the vacuum generator (3). The second branch pipe (18) is provided with a first control valve (182) and a purge inlet (184) located between the air extraction port (121) and the vacuum generator (3). The purge inlet (184) is located between the first control valve (182) and the vacuum generator (3). The first control valve (182) is configured to control the opening and closing of the air passage between the air extraction port (121) and the vacuum generator (3). The purge inlet (184) is configured to be connected to an external air source to blow gas toward the sampling chamber (14).

9. The vacuum sampling apparatus (1000) as described in any one of claims 1 to 4, characterized in that, The outlet of the vacuum generator (3) is connected to the inner cavity of the silo (2000) through a pipeline, and the silo (2000) and / or the pipeline are provided with a second control valve (2100). The second control valve (2100) is configured to control the opening and closing of the air passage between the outlet of the vacuum generator (3) and the inner cavity of the silo (2000).

10. A bag-breaking system, characterized in that, It includes a bag-breaking chamber and a vacuum sampling device (1000) as described in any one of claims 1 to 9, wherein the bag-breaking chamber includes a hopper (2000) and the vacuum sampling device (1000) is installed on the side wall of the hopper (2000).

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