Negative pressure feeding device

Abstract

This application provides a negative pressure feeding device. The negative pressure feeding device includes a hopper, a feeding mechanism, and a blower. The hopper is used to store powder. The feeding mechanism includes a tank and a first filter component. The tank includes a receiving cavity, an inlet, an outlet, and an exhaust port. The first filter component is disposed within the receiving cavity and connected to the inner wall of the tank. The first filter component divides the receiving cavity into a first chamber and a second chamber, and is used to block powder. The hopper communicates with the first chamber through the inlet. The tank is configured to cause the powder entering the first chamber from the inlet to form a swirling motion around the axis of the tank. The outlet is connected to the first chamber and is used to output the powder. The blower communicates with the second chamber through the exhaust port and is used to extract gas from the receiving cavity. According to this application, the reliability and working efficiency of the negative pressure feeding device can be effectively improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a negative pressure feeding device. Background Technology

[0002] With the development of new energy technologies, batteries are being used more and more widely, for example in mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools.

[0003] Electrode slurry is an important material in the battery manufacturing process. In the manufacturing process of electrode slurry, a negative pressure feeding device is usually used to transport the powder. The reliability and working efficiency of the negative pressure feeding device directly affect the production efficiency of the battery and have an important impact on the economic efficiency of the battery.

[0004] Therefore, how to effectively improve the reliability and efficiency of negative pressure feeding devices is an ongoing research direction in battery technology. Utility Model Content

[0005] In view of the above problems, this application provides a negative pressure feeding device, which can effectively improve the reliability and working efficiency of the negative pressure feeding device.

[0006] This application provides a negative pressure feeding device, which includes a hopper, a feeding mechanism, and a fan. The hopper is used to store powder. The feeding mechanism includes a tank and a first filter component. The tank includes a receiving cavity, an inlet, an outlet, and an exhaust port. The first filter component is disposed within the receiving cavity and connected to the inner wall of the tank. The first filter component divides the receiving cavity into a first chamber and a second chamber, and is used to block powder. The hopper is connected to the first chamber through the inlet. The tank is configured to cause the powder entering the first chamber from the inlet to form a swirling motion around the axis of the tank. The outlet is connected to the first chamber and is used to output the powder. The fan is connected to the second chamber through the exhaust port and is used to extract gas from the receiving cavity.

[0007] The tank of the above technical solution is configured to enable the powder entering the first cavity from the feed inlet to form a swirling motion around the axis of the tank. In other words, after the powder enters the first cavity from the feed inlet, the powder can rotate along the inner wall of the tank to generate centrifugal force, so as to form a swirling motion around the axis of the tank.

[0008] Under the action of centrifugal force, the powder (especially large particles) will be thrown towards the inner wall of the tank, thereby reducing the possibility of the powder (especially large particles) coming into contact with the first filter element, reducing the risk of the first filter element being blocked or damaged, extending the service life of the first filter element, reducing the downtime and maintenance time and cost of the negative pressure feeding device, and thus effectively improving the reliability and working efficiency of the negative pressure feeding device.

[0009] In some embodiments, a first cavity and a second cavity are arranged axially along the tank body, with a discharge port located at one end of the tank body axially near the first cavity and an exhaust port located at one end of the tank body axially near the second cavity. The tank body includes a first conical section, which at least surrounds the first cavity. The inner wall surface of the first conical section is configured as a tapered surface that gradually tapers in the direction from the second cavity to the first cavity.

[0010] On the one hand, the axial arrangement of the first and second chambers along the tank body ensures that the gas flow direction inside the tank is essentially parallel to the axial direction. This helps improve the swirling effect of the powder within the first chamber, thereby enhancing the centrifugal force on the powder and further reducing the likelihood of the powder contacting the first filter component. On the other hand, the discharge port and exhaust port are respectively located at both ends of the tank body along the axial direction, effectively reducing the impact of high-speed airflow disturbance on the powder output from the discharge port, thus improving the stability of the discharge.

[0011] The inner wall of the first conical section can promote the compression and convergence of the gas flow field, thereby enhancing the stability and speed of the powder swirling and improving the effectiveness of centrifugal action. In addition, the geometric contractility of the conical surface helps to guide the powder downwards and concentrate it to the discharge port under the combined action of gravity and swirling, improving discharge efficiency.

[0012] In some embodiments, the tank further includes a first extension connected to one axial end of the first conical segment, the first extension being disposed at least around the second cavity. In the same plane perpendicular to the axial direction, the orthographic projection of the first extension overlaps the orthographic projection of the first conical segment.

[0013] Along the axial direction of the tank, the first extension section per unit length has a larger internal volume than the first conical section per unit length. By further introducing the first extension section, the effective volume of the tank can be significantly increased while maintaining a fixed total tank length. This increased internal volume not only helps to raise the upper limit of single-batch feeding but also provides more operational space for the installation of the first filter component, reducing its installation difficulty. Furthermore, the cooperation between the first extension section and the first conical section allows for the improvement of the overall storage capacity of the tank while maintaining or optimizing the swirling characteristics within the tank.

[0014] In some embodiments, a portion of the first extension is disposed around the first cavity, and another portion is disposed around the second cavity, with the feed inlet disposed on the first extension.

[0015] This increases the distance between the inlet and outlet, allowing the powder to have sufficient flow path and residence time after entering the first chamber, enabling it to achieve full swirling motion before being discharged from the outlet. This helps reduce the phenomenon of powder rushing directly to the outlet due to excessive inertia or the lack of established swirling flow immediately after entering the first chamber, reducing the risk of poor discharge due to powder accumulation, blockage, or impact, and improving the reliability of the negative pressure feeding device.

[0016] In some embodiments, the feeding mechanism further includes a cylinder disposed within a first cavity. The cylinder has a channel, a first port, and a second port, the first port and the second port being respectively connected to the two ends of the channel along the axial direction. The channel is connected to the first cavity through the first port and to the second cavity through the second port.

[0017] The cylindrical design helps to create a rotating flow zone around the outer wall of the cylinder, forming an annular swirling flow channel in the gap between the outer wall of the cylinder and the inner wall of the tank. This zone guides the powder to perform orderly swirling motion, effectively suppressing large-scale turbulence caused by sudden changes in flow velocity or air intake disturbances when the powder first enters the first chamber, thus improving the reliability of the negative pressure feeding device.

[0018] In some embodiments, the cylinder includes a second conical segment, the outer wall surface of which is configured as a tapered surface that gradually tapers in the direction from the second cavity to the first cavity.

[0019] The outer wall of the second conical section can promote the compression and convergence of the gas flow field, thereby enhancing the stability and speed of the powder swirling and improving the effectiveness of centrifugal action. In addition, the geometric contraction of the conical surface helps to guide the powder downward and concentrate it to the discharge port under the combined action of gravity and swirling, improving discharge efficiency.

[0020] In some embodiments, the cylinder further includes a second extension connected to one end of the second conical section near the first cavity. In the same plane perpendicular to the axial direction, the orthographic projection of the second conical section overlaps the orthographic projection of the second extension.

[0021] In the axial direction of the tank, the second extension section per unit length has a smaller volume than the second conical section per unit length. By further introducing the second extension section, it is possible to increase the length of the cylinder to extend the annular swirling flow channel formed between the cylinder and the tank, while relatively reducing the space occupied by the first cavity.

[0022] In some embodiments, the feeding mechanism further includes a first cleaning component connected to the tank and used to transfer powder from the first filter component into the first cavity.

[0023] Since some fine particles inevitably adhere to the first filter element during the cyclone conveying process, the powder can be cleaned by setting a first cleaning element to extend the service life of the first filter element, reduce the maintenance frequency, and thus improve the overall working efficiency of the negative pressure feeding device.

[0024] In some embodiments, at least a portion of the first cleaning member is disposed within the second cavity, and the first cleaning member is configured to blow air onto the first filter member to blow powder from the first filter member into the first cavity.

[0025] Cleaning the powder off the first filter element by blowing air can reduce the risk of damage to the first filter element, thereby helping to extend its service life.

[0026] In some embodiments, the feeding mechanism further includes a second cleaning component connected to the tank body and disposed on the outside of the tank body. The second cleaning component is configured to impact the tank body to shake the powder on the inner wall surface of the tank body into the first cavity.

[0027] Since some fine particles inevitably adhere to the inner wall of the tank during the cyclone conveying process, a second cleaning component can be installed to remove the powder from the inner wall, reducing powder loss and waste, and lowering maintenance frequency. Cleaning the powder from the inner wall of the tank using external physical impact offers advantages such as simple construction, convenient maintenance, and reliable operation.

[0028] In some embodiments, the first filtration component includes a filter screen and a support frame, the filter screen being connected to the tank body via the support frame. The negative pressure feeding device also includes a conveying pipe detachably connected between the inlet and the hopper. The conveying pipe includes multiple sub-pipes, which are detachably connected to each other.

[0029] It can improve the overall structural stability of the first filter component, extend its service life, and reduce maintenance frequency, thereby improving the working efficiency of the negative pressure feeding device. It facilitates the installation and removal of the conveying pipeline, reducing the maintenance cost of the negative pressure feeding device. It allows for the adaptive selection of different sub-pipes based on the structure, shape, and size characteristics of the powder, thus improving the applicability of the negative pressure feeding device.

[0030] In some embodiments, the inner wall surface of the conveying pipe is provided with a wear-resistant layer, which can improve the service life of the conveying pipe.

[0031] In some embodiments, the negative pressure feeding device further includes a first valve and a second valve. The first valve is connected between the exhaust port and the fan, and the second valve is connected between the fan and the atmospheric environment. The first valve and the second valve are connected in parallel, and the second valve is located between the first valve and the fan.

[0032] The above technical solution, by setting a first valve and a second valve to cooperate with the different working stages of the negative pressure feeding device, can further reduce the impact of the blower on the discharge of powder during the discharge stage and improve the discharge efficiency.

[0033] In some embodiments, the negative pressure feeding device further includes a second filter element connected between the second valve and the atmospheric environment.

[0034] The second filter component can reduce the risk of dust and other impurities in the atmosphere being drawn into the fan during the discharge stage, thereby improving the service life of the fan.

[0035] In some embodiments, the negative pressure feeding device further includes a third valve and a fourth valve. The third valve is connected between the hopper and the feed inlet, and the fourth valve is connected between the feed inlet and the ambient air. The third and fourth valves are connected in parallel, with the fourth valve located between the third valve and the feed inlet. The negative pressure feeding device also includes a flow sensor connected between the hopper and the feed inlet, which is used to detect the flow rate of the powder.

[0036] The above technical solution, by setting a third and fourth valve to cooperate with different working stages of the negative pressure feeding device, can reduce the residual powder in the conveying pipe between the feed inlet and the silo. This not only reduces the risk of blockage in the conveying pipe and reduces maintenance frequency and cost, but also reduces powder waste.

[0037] By introducing a flow sensor, real-time monitoring of the powder flow rate between the hopper and the feed inlet can be achieved. The flow sensor continuously collects powder flow data between the hopper and the feed inlet, enabling operators to fully understand the powder flow rate trends during equipment operation, thus providing reliable data support for process monitoring, fault early warning, and parameter adjustment.

[0038] Furthermore, the flow sensor can be linked with the control device to form a closed-loop control mechanism. Based on the collected flow signal, the control device can analyze in real time whether the current operating conditions are within the set range, and then control the relevant components to automatically adjust to maintain the stability of the powder flow and prevent risks caused by abnormal powder flow.

[0039] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0040] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0041] Figure 1 This is a schematic diagram of the structure of a negative pressure feeding device provided in some embodiments of this application;

[0042] Figure 2 A three-dimensional structural schematic diagram of the feeding mechanism of a negative pressure feeding device provided in some embodiments of this application;

[0043] Figure 3 This is a top view of the feeding mechanism of a negative pressure feeding device provided in some embodiments of this application.

[0044] The reference numerals in the detailed embodiments are as follows:

[0045] 10. Hopper; 20. Feeding mechanism;

[0046] 21. Tank body; 21a. First conical section; 21b. First extension section; 211. Receiving cavity; 2111. First cavity; 2112. Second cavity; 212. Feed inlet; 213. Discharge outlet; 214. Vent.

[0047] 22. First filter component;

[0048] 23. Cylinder body; 23a. Second conical section; 23b. Second extension section; 231. Channel; 232. First port; 233. Second port;

[0049] 24. First cleaning component; 25. Second cleaning component;

[0050] 30. Fan; 40. Material conveying pipeline; 50. First valve; 60. Second valve; 70. Second filter element; 80. Third valve; 90. Fourth valve; 100. Pressure sensor; 110. Flow sensor;

[0051] X, axial direction; V, axis. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0053] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the specification of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, rather than to describe a specific order or hierarchy.

[0054] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0055] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0056] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0057] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0058] In this application, "multiple" means two or more (including two).

[0059] In this application, the term "parallel" includes not only the case of absolute parallelism, but also the case of approximate parallelism as commonly understood in engineering; similarly, "perpendicular" includes not only the case of absolute perpendicularity, but also the case of approximate perpendicularity as commonly understood in engineering.

[0060] In this application, the battery cell may include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, etc., and the embodiments of this application are not limited thereto. The battery cell may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited thereto.

[0061] With the development of new energy technologies, batteries are being used more and more widely, for example in mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools.

[0062] Electrode slurry is an important material in the battery manufacturing process. In the manufacturing process of electrode slurry, a negative pressure feeding device is usually used to transport the powder. The reliability and working efficiency of the negative pressure feeding device directly affect the production efficiency of the battery and have an important impact on the economic efficiency of the battery.

[0063] In related technologies, negative pressure feeding devices typically include a hopper, a tank, a bag filter element, and a blower. The bag filter element is installed inside the tank, and the blower is used to extract gas from the tank to create a negative pressure. This negative pressure forces the powder from the hopper into the tank, completing the feeding process. The bag filter element prevents powder from being drawn into the blower.

[0064] However, since the powder often contains large particles, these particles directly impact the bag filter element. Over time, this not only damages the filter element but also easily causes blockage, affecting the fan's ventilation of the tank. Therefore, frequent shutdowns are necessary to clean or replace the filter element, severely impacting the reliability and efficiency of the negative pressure feeding device.

[0065] Based on the above considerations, this application designs a negative pressure feeding device, which includes a hopper, a feeding mechanism, and a blower. The hopper is used to store powder. The feeding mechanism includes a tank and a first filter component. The tank includes a receiving cavity, an inlet, an outlet, and an exhaust port. The first filter component is disposed within the receiving cavity and connected to the inner wall of the tank. The first filter component divides the receiving cavity into a first chamber and a second chamber, and is used to block powder. The hopper is connected to the first chamber through the inlet. The tank is configured to cause the powder entering the first chamber from the inlet to form a swirling motion around the axis of the tank. The outlet is connected to the first chamber and is used to output the powder. The blower is connected to the second chamber through the exhaust port and is used to extract gas from the receiving cavity.

[0066] The tank is configured to cause the powder entering the first chamber from the feed inlet to form a swirling motion around the axis of the tank. In other words, after the powder enters the first chamber from the feed inlet, the powder can rotate along the inner wall of the tank, generating centrifugal force to form a swirling motion around the axis of the tank.

[0067] Under the action of centrifugal force, the powder (especially large particles) will be thrown towards the inner wall of the tank, thereby reducing the possibility of the powder (especially large particles) coming into contact with the first filter element, reducing the risk of the first filter element being blocked or damaged, extending the service life of the first filter element, reducing the downtime and maintenance time and cost of the negative pressure feeding device, and thus effectively improving the reliability and working efficiency of the negative pressure feeding device.

[0068] Figure 1 This is a schematic diagram of the structure of a negative pressure feeding device provided in some embodiments of this application. Figure 2 This is a three-dimensional structural diagram of the feeding mechanism of a negative pressure feeding device provided in some embodiments of this application. Figure 3 This is a top view of the feeding mechanism of a negative pressure feeding device provided in some embodiments of this application.

[0069] like Figures 1 to 3As shown in the figure, this application embodiment provides a negative pressure feeding device, which includes a hopper 10, a feeding mechanism 20, and a blower 30. The hopper 10 is used to store powder. The feeding mechanism 20 includes a tank 21 and a first filter component 22. The tank 21 includes a receiving cavity 211, a feed inlet 212, a discharge outlet 213, and an exhaust outlet 214. The first filter component 22 is disposed in the receiving cavity 211 and connected to the inner wall of the tank 21. The first filter component 22 divides the receiving cavity 211 into a first cavity 2111 and a second cavity 2112. The first filter component 22 is used to block powder. The hopper 10 is connected to the first cavity 2111 through the feed inlet 212. The tank 21 is configured to cause the powder entering the first cavity 2111 from the feed inlet 212 to form a swirling motion around the axis V of the tank 21. The discharge outlet 213 is connected to the first cavity 2111 and is used to output powder. The fan 30 is connected to the second cavity 2112 through the exhaust port 214, and the fan 30 is used to extract the gas in the receiving cavity 211.

[0070] The tank 21 can be constructed in various ways to make the powder entering the first cavity 2111 from the feed inlet 212 form a swirling motion around the axis V of the tank 21.

[0071] As an example, a feed inlet 212 can be provided on the side wall of the tank 21, arranged tangentially to the inner wall of the tank 21. After the powder enters the first chamber 2111 through the feed inlet 212, because the flow direction of the powder is parallel to the tangential direction of the inner wall of the tank 21, the powder will move tangentially along the inner wall of the tank 21, thus spontaneously forming a swirling motion around the axis V of the tank 21. This structure is simple and can effectively utilize momentum transfer to form a swirling flow, such as in a cyclone separator.

[0072] As another example, several guide vanes can be arranged in the area near the feed inlet 212 within the first cavity 2111. These guide vanes are connected to the inner wall of the tank 21. The function of these guide vanes is to force the powder entering the first cavity 2111 from the feed inlet 212 into a rotating path, causing the powder to form a swirling motion around the axis V of the tank 21 within the first cavity 2111. This structure effectively enhances the swirling intensity of the powder.

[0073] As another example, multiple nozzles can be provided on the inner wall of the tank 21. These nozzles can spray auxiliary airflow into the first cavity 2111, which can drive the powder entering the first cavity 2111 from the feed inlet 212 to form a swirling motion around the axis V of the tank 21. This structure allows for easy control of the intensity and stability of the powder swirling motion by adjusting parameters such as the intensity and direction of the auxiliary airflow.

[0074] For example, in the same plane perpendicular to the axial direction X of the tank 21, the orthographic projection of the inner wall surface of the tank 21 can be, but is not limited to, a circle, an ellipse, or an annulus.

[0075] The hopper 10 and the feed inlet 212 can be connected by pipe fittings, and the fan 30 and the exhaust port 214 can be connected by pipe fittings.

[0076] The first filter element 22 can be detachably connected to the tank body 21, or it can be integrally mounted on the tank body 21. The first filter element 22 can be directly connected to the tank body 21, or it can be constrained to the tank body 21 by other components. As an example, the connection method between the first filter element 22 and the tank body 21 can be, but is not limited to, welding, bolting, snap-fitting, riveting, or bonding.

[0077] Optionally, the first filter element 22 may be, but is not limited to, a cartridge filter, a plate filter, a bag filter, or a mesh filter.

[0078] Optionally, the blower 30 may be, but is not limited to, a Roots blower 30, a centrifugal blower 30, an axial flow blower 30, or a DC brushless blower 30.

[0079] For example, the blower 30 draws gas from the receiving cavity 211 on one side of the second cavity 2112 to create a negative pressure in the receiving cavity 211. Under the action of negative pressure, the powder in the hopper 10 can enter the first cavity 2111 through the feed inlet 212. After the powder enters the first cavity 2111 through the feed inlet 212, the powder can form a swirling motion around the axis V of the tank 21. Since the powder is also subject to gravity, it will gradually gather along the direction of gravity while swirling, and finally be discharged through the discharge outlet 213, thus completing the feeding work of the negative pressure feeding device. In particular, due to the blocking effect of the first filter component 22 on the powder, the powder located in the first cavity 2111 will not enter the second cavity 2112, thereby reducing the risk of powder being drawn into the blower 30 and damaging the blower 30.

[0080] The tank 21 of the above technical solution is configured to enable the powder entering the first cavity 2111 from the feed inlet 212 to form a swirling motion around the axis V of the tank 21. That is, after the powder enters the first cavity 2111 from the feed inlet 212, the powder can rotate along the inner wall of the tank 21 to generate centrifugal force, so as to form a swirling motion around the axis V of the tank 21.

[0081] Under the action of centrifugal force, the powder (especially large particles) will be thrown towards the inner wall of the tank 21, thereby reducing the possibility of the powder (especially large particles) coming into contact with the first filter element 22, reducing the risk of the first filter element 22 being blocked or damaged, extending the service life of the first filter element 22, reducing the downtime and maintenance time and cost of the negative pressure feeding device, thereby effectively improving the reliability and working efficiency of the negative pressure feeding device.

[0082] In some embodiments, the first cavity 2111 and the second cavity 2112 are arranged along the axial direction X of the tank body 21, the discharge port 213 is arranged at one end of the tank body 21 along the axial direction X near the first cavity 2111, and the exhaust port 214 is arranged at one end of the tank body 21 along the axial direction X near the second cavity 2112.

[0083] On the one hand, the arrangement of the first chamber 2111 and the second chamber 2112 along the axial direction X of the tank body 21 ensures that the gas flow direction inside the tank body 21 is basically parallel to the axial direction X. This helps to improve the swirling effect of the powder in the first chamber 2111, thereby enhancing the centrifugal force on the powder and further reducing the possibility of the powder coming into contact with the first filter component 22. On the other hand, the discharge port 213 and the exhaust port 214 are respectively located at both ends of the tank body 21 along the axial direction X, which can effectively reduce the impact of high-speed airflow disturbance on the powder output from the discharge port 213, thereby improving the stability of the discharge from the discharge port 213.

[0084] In some embodiments, the axial direction X of the tank 21 is parallel to the direction of gravity. This can further improve the effect of powder gathering towards the discharge port 213 under the action of gravity.

[0085] In some embodiments, the tank 21 includes a first conical segment 21a, which is disposed at least around the first cavity 2111, and the inner wall surface of the first conical segment 21a is configured as a tapered surface that gradually tapers in the direction of the second cavity 2112 toward the first cavity 2111.

[0086] For example, the first conical segment 21a being disposed at least around the first cavity 2111 means that at least a portion of the first conical segment 21a is disposed corresponding to the first cavity 2111, that is, at least a portion of the first conical segment 21a surrounds and forms the first cavity 2111.

[0087] The first conical segment 21a can be entirely surrounding the first cavity 2111, or the first conical segment 21a can be partially surrounding the first cavity 2111 and partially surrounding the second cavity 2112.

[0088] The inner wall of the first conical section 21a can promote the compression and convergence of the gas flow field, thereby enhancing the stability and speed of the powder swirling and improving the effectiveness of centrifugal action. In addition, the geometric contraction of the conical surface helps to guide the powder downward and concentrate it to the discharge port 213 under the dual action of gravity and swirling, improving the discharge efficiency.

[0089] In some embodiments, the outer wall surface of the first conical segment 21a is configured as a tapered surface that gradually tapers in the direction from the second cavity 2112 to the first cavity 2111. This facilitates the fabrication of the first conical segment 21a by integrally bending a sheet metal, thereby simplifying the fabrication process and reducing costs.

[0090] In some embodiments, the tank 21 further includes a first extension 21b, which is connected to one end of the first conical segment 21a along the axial direction X, and the first extension 21b is disposed at least around the second cavity 2112. In the same plane perpendicular to the axial direction X, the orthographic projection of the first extension 21b covers the orthographic projection of the first conical segment 21a.

[0091] For example, the first extension 21b being provided at least around the second cavity 2112 means that at least a portion of the first extension 21b is provided corresponding to the second cavity 2112, that is, at least a portion of the first extension 21b surrounds and forms the second cavity 2112.

[0092] The first extension segment 21b may be entirely surrounding the second cavity 2112, or the first extension segment 21b may be partially surrounding the first cavity 2111 and partially surrounding the second cavity 2112.

[0093] The first extension segment 21b can be detachably connected to the first conical segment 21a, or it can be integrally formed on the first conical segment 21a. The first extension segment 21b can be directly connected to the first conical segment 21a, or it can be constrained to the first conical segment 21a by other components. As an example, the connection method between the first extension segment 21b and the first conical segment 21a can be, but is not limited to, welding, bolting, snap-fitting, riveting, or bonding.

[0094] Along the axial direction X of the tank 21, the first extension segment 21b per unit length has a larger internal volume than the first conical segment 21a per unit length. By further introducing the first extension segment 21b, the effective volume of the tank 21 can be significantly increased under the condition that the total length of the tank 21 is constant.

[0095] The increased internal volume of the tank 21 not only helps to increase the upper limit of the single feeding amount, but also provides more operating space for the installation of the first filter element 22, thereby reducing the difficulty of installing the first filter element 22. In addition, through the cooperation of the first extension section 21b and the first conical section 21a, the overall storage capacity of the tank 21 can be increased while maintaining or optimizing the swirling characteristics inside the tank 21.

[0096] In some embodiments, the first conical segment 21a may be partially arranged around the first cavity 2111 and partially arranged around the second cavity 2112, and the first extension segment 21b may be entirely arranged around the second cavity 2112.

[0097] In some embodiments, the orthographic projection of the inner wall surface of the first extension 21b in the same plane perpendicular to the axial direction X is a circle.

[0098] In some embodiments, the orthographic projection of the outer wall surface of the first extension segment 21b in the same plane perpendicular to the axial direction X is circular. This facilitates the fabrication of the first extension segment 21b by integrally bending a sheet metal, thereby simplifying the fabrication process and reducing costs.

[0099] In some embodiments, the first conical segment 21a and the first extension segment 21b are integrally formed. On the one hand, there is no need to connect the first conical segment 21a and the first extension segment 21b through an additional connecting process, simplifying the manufacturing process. On the other hand, compared with connecting the first conical segment 21a and the first extension segment 21b through an additional connecting process, the integrally formed first conical segment 21a and the first extension segment 21b have higher structural strength.

[0100] In some embodiments, a portion of the first extension 21b surrounds the first cavity 2111 and another portion surrounds the second cavity 2112, with the feed inlet 212 located on the first extension 21b.

[0101] This increases the distance between the inlet 212 and the outlet 213, allowing the powder to have sufficient flow path and residence time after entering the first chamber 2111, so that it can achieve sufficient swirling motion before being discharged from the outlet 213. This helps to reduce the phenomenon that the powder will rush directly to the outlet 213 after entering the first chamber 2111 due to excessive inertia or before the swirling motion has been established. It also reduces the risk of poor discharge from the outlet 213 caused by powder accumulation, blockage or impact, and improves the reliability of the negative pressure feeding device.

[0102] In some embodiments, the feeding mechanism 20 further includes a cylinder 23 disposed within the first cavity 2111. The cylinder 23 has a channel 231, a first port 232, and a second port 233. The first port 232 and the second port 233 are respectively connected to the two ends of the channel 231 along the axial direction X. The channel 231 is connected to the first cavity 2111 through the first port 232, and the channel 231 is connected to the second cavity 2112 through the second port 233.

[0103] The cylinder 23 can be connected to the inner wall of the tank 21, or it can be connected to the first filter component 22, or it can be connected to both the inner wall of the tank 21 and the first filter component 22.

[0104] The arrangement of the cylinder 23 helps to form a rotating flow area around the outer wall of the cylinder 23, that is, an annular swirling flow channel is formed in the gap between the outer wall of the cylinder 23 and the inner wall of the tank 21. This area can guide the powder to make orderly swirling motion, effectively suppressing the large-scale turbulence phenomenon caused by sudden changes in flow rate or air intake disturbance when the powder first enters the first cavity 2111, and improving the reliability of the negative pressure feeding device.

[0105] In some embodiments, the cylinder 23 includes a second conical segment 23a, the outer wall surface of which is configured as a tapered surface that gradually tapers in the direction from the second cavity 2112 to the first cavity 2111.

[0106] The outer wall of the second conical section 23a can promote the compression and convergence of the gas flow field, thereby enhancing the stability and speed of the powder swirling and improving the effectiveness of centrifugal action. In addition, the geometric contraction of the conical surface helps to guide the powder downward and concentrate it to the discharge port 213 under the combined action of gravity and swirling, improving the discharge efficiency.

[0107] In some embodiments, the inner wall surface of the second conical segment 23a is configured as a tapered surface that gradually tapers in the direction from the second cavity 2112 to the first cavity 2111. This facilitates the fabrication of the second conical segment 23a by integrally bending a sheet metal, thereby simplifying the fabrication process and reducing costs.

[0108] In some embodiments, the cylindrical body 23 further includes a second extension 23b, which is connected to one end of the second conical section 23a near the first cavity 2111. In the same plane perpendicular to the axial direction X, the orthographic projection of the second conical section 23a overlaps the orthographic projection of the second extension 23b.

[0109] The second extension segment 23b can be detachably connected to the second conical segment 23a, or it can be integrally formed on the second conical segment 23a. The second extension segment 23b can be directly connected to the second conical segment 23a, or it can be constrained to the second conical segment 23a by other components. As an example, the connection method between the second extension segment 23b and the second conical segment 23a can be, but is not limited to, welding, bolting, snap-fitting, riveting, or bonding.

[0110] Along the axial direction X of the tank 21, the second extension segment 23b per unit length has a smaller volume than the second conical segment per unit length. By further introducing the second extension segment 23b, it is possible to increase the length of the cylinder 23 to extend the annular swirling flow channel formed between the cylinder 23 and the tank 21, while relatively reducing the space occupied by the first cavity 2111.

[0111] In some embodiments, the orthographic projection of the outer wall surface of the second extension 23b in the same plane perpendicular to the axial direction X is a circle.

[0112] In some embodiments, the orthographic projection of the inner wall surface of the second extension segment 23b is also circular in the same plane perpendicular to the axial direction X. This facilitates the fabrication of the second extension segment 23b by integrally bending the sheet metal, thereby simplifying the fabrication process and reducing costs.

[0113] In some embodiments, the second conical segment 23a and the second extension segment 23b are integrally formed. On the one hand, there is no need to connect the second conical segment 23a and the second extension segment 23b through an additional connecting process, simplifying the manufacturing process. On the other hand, compared to connecting the second conical segment 23a and the second extension segment 23b through an additional connecting process, the integrally formed second conical segment 23a and the second extension segment 23b have higher structural strength.

[0114] In some embodiments, the first conical segment is disposed around a portion of the second conical segment, and the first extension 21b is disposed around another portion of the second conical segment.

[0115] In some embodiments, the feeding mechanism 20 further includes a first cleaning component 24, which is connected to the tank 21 and is used to transfer the powder on the first filter component 22 into the first cavity 2111.

[0116] The first cleaning component 24 is installed and connected to the tank 21 and arranged near the first filter component 22, for periodically or in real time transferring the powder adhering to the first filter component 22 into the first cavity 2111.

[0117] The first cleaning component 24 can be directly connected to the tank 21, or it can be constrained to the tank 21 by other components. As an example, the connection method between the first cleaning component 24 and the tank 21 can be, but is not limited to, welding, bolting, snap-fitting, riveting, or bonding.

[0118] Since some fine particles inevitably adhere to the first filter element 22 during the cyclone conveying process, the first cleaning element 24 can be set to clean the powder on the first filter element 22, thereby improving the service life of the first filter element 22, reducing the maintenance frequency, and thus improving the overall working efficiency of the negative pressure feeding device.

[0119] The first cleaning component 24 can transfer the powder on the first filter component 22 into the first cavity 2111 in a variety of ways.

[0120] As an example, the first cleaning component 24 may be a pulse blowing assembly that blows powder from the first filter component 22 into the first cavity 2111 by a high-pressure air pulse controlled by a solenoid valve.

[0121] As another example, the first cleaning component 24 may also be a rotating brush assembly that sweeps the powder on the first filter component 22 into the first cavity 2111 by rotating.

[0122] As another example, the first cleaning component 24 can also be a vibrator, which vibrates to shake the powder on the first filter component 22 into the first cavity 2111.

[0123] In some embodiments, the first cleaning component 24 may be detachably connected to the tank 21.

[0124] In some embodiments, at least a portion of the first cleaning member 24 is disposed within the second cavity 2112, and the first cleaning member 24 is configured to blow air onto the first filter member 22 to blow powder on the first filter member 22 into the first cavity 2112.

[0125] Cleaning the powder on the first filter element 22 by blowing air can reduce the risk of damage to the first filter element 22, thereby helping to improve the service life of the first filter element 22.

[0126] In some embodiments, the first cleaning component 24 includes a nozzle, an air tube, and a pulse valve. The nozzle is positioned toward the first filter component 22. The pulse valve connects the air tube and the nozzle. The air tube connects the nozzle and an air source. The pulse valve controls the nozzle to blow air toward the first filter component 22.

[0127] In some embodiments, the first cleaning component 24 further includes a compressed air tank connected between an air source and an air pipe, the compressed air pipe being used to supply compressed gas to the nozzle.

[0128] In some embodiments, the first cleaning component 24 further includes a pressure gauge connected to a compressed air tank, which is used to detect the air pressure inside the compressed air tank.

[0129] In some embodiments, the feeding mechanism 20 further includes a second cleaning component 25, which is connected to the tank 21 and is used to transfer the powder on the inner wall surface of the tank 21 into the first cavity 2111.

[0130] The second cleaning component 25 is used to periodically or in real time transfer the powder adhering to the inner wall of the tank 21 to the first cavity 2111.

[0131] The second cleaning component 25 can be directly connected to the tank 21, or it can be constrained to the tank 21 by other components. As an example, the connection method between the second cleaning component 25 and the tank 21 can be, but is not limited to, welding, bolting, snap-fitting, riveting, or bonding.

[0132] Since some fine particles inevitably adhere to the inner wall of the tank 21 during the cyclone conveying process, the second cleaning component 25 can be installed to clean the powder on the inner wall of the tank 21, thereby reducing powder loss and waste, and reducing maintenance frequency.

[0133] The second cleaning component 25 can transfer the powder on the inner wall of the tank 21 to the first cavity 2111 in a variety of ways.

[0134] As an example, the second cleaning component 25 may be a pulse blowing assembly that blows powder from the inner wall of the tank 21 into the first cavity 2111 by a high-pressure air pulse controlled by a solenoid valve.

[0135] As another example, the second cleaning component 25 can also be a rotating brush assembly that sweeps powder from the inner wall of the tank 21 into the first cavity 2111 by rotating.

[0136] As another example, the second cleaning component 25 can also be a vibrator, which vibrates the powder on the inner wall of the tank 21 into the first cavity 2111.

[0137] In some embodiments, the second cleaning component 25 may be detachably connected to the tank 21.

[0138] In some embodiments, a second cleaning component 25 is disposed on the outside of the tank 21 and is configured to impact the tank 21 to shake powder on the inner wall of the tank 21 into the first cavity 2111.

[0139] The powder on the inner wall of the tank 21 is cleaned by external physical impact, which has the advantages of simple structure, convenient maintenance and reliable operation.

[0140] In some embodiments, the second cleaning component 25 may be, but is not limited to, a mechanical cam, a pneumatic hammer, or an electromagnetic vibrator.

[0141] In some embodiments, the first filter element 22 includes a filter screen and a support frame, with the filter screen connected to the tank 21 via the support frame.

[0142] It can improve the overall structural stability of the first filter component 22, extend its service life, reduce the maintenance frequency, and thus improve the working efficiency of the negative pressure feeding device.

[0143] In some embodiments, the wind speed of the fan 30 can be adjusted.

[0144] For example, the negative pressure feeding device may include two working stages: a feeding stage and a discharging stage. In the feeding stage, the blower 30 starts in high-speed mode, and the powder is sucked from the hopper 10 into the first cavity 2111 under the action of negative pressure. After the set feeding time is reached, the discharging stage begins.

[0145] During the discharge stage, the blower 30 can reduce its speed and enter energy-saving mode. The gravity of the powder is greater than the suction force of the blower 30, allowing the powder to be discharged from the outlet 213 under the action of gravity. After the powder is discharged, the blower 30 switches back to high-speed mode and enters the feeding stage, and this cycle repeats.

[0146] By adopting a fan 30 with adjustable wind speed, the wind speed of the fan 30 can be adjusted to adapt to different working stages. This not only avoids the high energy consumption caused by frequent start-stop of the fan 30, but also reduces the risk of damage to the fan 30 due to frequent start-stop, and improves the service life of the fan 30.

[0147] In some embodiments, the negative pressure feeding device further includes a conveying pipe 40, which is detachably connected between the inlet 212 and the hopper 10. This facilitates the installation and removal of the conveying pipe 40, reducing the maintenance costs of the negative pressure feeding device.

[0148] In some embodiments, the conveying pipe 40 includes a plurality of sub-pipes that are detachably connected to each other.

[0149] Different sub-pipes can be selected adaptively according to the structure, shape and size characteristics of the powder to improve the applicability of the negative pressure feeding device.

[0150] In some embodiments, at least two of the multiple sub-pipes have different diameters.

[0151] In some embodiments, the inner wall surface of the conveying pipe 40 is provided with a wear-resistant layer, which can improve the service life of the conveying pipe 40.

[0152] For example, the wear-resistant layer may be, but is not limited to, ceramic, stainless steel, or carbon steel alloy.

[0153] In some embodiments, the negative pressure feeding device further includes a first valve 50 and a second valve 60. The first valve 50 is connected between the exhaust port 214 and the fan 30, and the second valve 60 is connected between the fan 30 and the atmospheric environment. The first valve 50 and the second valve 60 are connected in parallel, and the second valve 60 is located between the first valve 50 and the fan 30.

[0154] For example, the negative pressure feeding device may include two working stages: a feeding stage and a discharging stage. In the feeding stage, the first valve 50 is opened, the second valve 60 is closed, the blower 30 starts in high-speed mode, and the powder is sucked from the hopper 10 into the first cavity 2111 under the action of negative pressure. After the set feeding time is reached, the discharging stage begins.

[0155] During the discharge stage, the first valve 50 is closed, the second valve 60 is opened, and the blower 30 can reduce its speed to enter energy-saving mode. The blower 30 draws air from the atmosphere, ensuring that the airflow from the blower 30 does not affect the internal environment of the receiving cavity 211. Under the influence of gravity, the powder can be discharged more efficiently from the discharge port 213. After the powder is discharged, the first valve 50 is opened again, the second valve 60 is closed, and the blower 30 is switched to high-speed mode to enter the feeding stage. This cycle is repeated.

[0156] Optionally, both the first valve 50 and the second valve 60 can be, but are not limited to, manual mechanical valves or electrically controlled valves.

[0157] As an example, both the first valve 50 and the second valve 60 are electrically controlled valves, which can be automatically controlled to open or close by a control device.

[0158] The above technical solution, by setting the first valve 50 and the second valve 60 to cooperate with the different working stages of the negative pressure feeding device, can further reduce the impact of the fan 30 on the discharge of powder during the discharge stage and improve the discharge efficiency.

[0159] In some embodiments, the negative pressure feeding device further includes a second filter element 70, which is connected between the second valve 60 and the atmospheric environment.

[0160] The second filter component 70 can reduce the risk of dust and other impurities in the atmosphere being drawn into the fan 30 during the discharge stage when the fan 30 draws air from the atmosphere, thereby improving the service life of the fan 30.

[0161] Optionally, the second filter element 70 may be, but is not limited to, a cartridge filter, a plate filter, a bag filter, or a mesh filter.

[0162] In some embodiments, the negative pressure feeding device further includes a third valve 80 and a fourth valve 90. The third valve 80 is connected between the hopper 10 and the feed inlet 212, and the fourth valve 90 is connected between the feed inlet 212 and the atmospheric environment. The third valve 80 and the fourth valve 90 are connected in parallel, and the fourth valve 90 is located between the third valve 80 and the feed inlet 212.

[0163] For example, the negative pressure feeding device may include two or three working stages, namely a feeding stage, an emptying stage, and a discharging stage. In the feeding stage, the first valve 50 and the third valve 80 are opened, the second valve 60 and the fourth valve 90 are closed, the blower 30 starts in high-speed mode, and the powder is sucked from the hopper 10 into the first cavity 2111 under the action of negative pressure. After the set feeding time is reached, the discharging stage begins.

[0164] During the emptying phase, the first valve 50 and the fourth valve 90 are opened, the second valve 60 and the third valve 80 are closed, the blower 30 starts the high wind speed mode, and the residual powder in the conveying pipe 40 located between the feed inlet 212 and the hopper 10 is sucked into the first cavity 2111 under the action of negative pressure. After the set emptying time is reached, the discharge phase begins.

[0165] During the discharge stage, valves 50, 80, and 90 are closed, while valve 60 is opened. Fan 30 reduces its speed to enter energy-saving mode, drawing air from the atmosphere. This ensures that the fan's suction does not affect the internal environment of the receiving cavity 211, allowing the powder to be discharged more efficiently from the outlet 213 under gravity. After the powder is discharged, valves 50 and 80 are reopened, valves 60 and 90 are closed, and fan 30 is switched to high-speed mode to begin the feeding stage. This cycle repeats continuously.

[0166] Optionally, the third valve 80 and the fourth valve 90 can be, but are not limited to, manual mechanical valves or electrically controlled valves.

[0167] As an example, both the third valve 80 and the fourth valve 90 are electrically controlled valves, which can be automatically controlled to open or close by a control device.

[0168] The above technical solution, by setting a third valve 80 and a fourth valve 90 to cooperate with different working stages of the negative pressure feeding device, can reduce the residual powder in the conveying pipe 40 between the feed inlet 212 and the hopper 10. This not only reduces the risk of blockage in the conveying pipe 40 and reduces maintenance frequency and cost, but also reduces powder waste.

[0169] In some embodiments, the negative pressure feeding device further includes a fifth valve connected to the discharge port 213.

[0170] For example, the fifth valve is open during the discharge phase and closed during the feeding and / or emptying phases.

[0171] Optionally, the fifth valve may be, but is not limited to, a manually operated mechanical valve or an electrically controlled valve.

[0172] As an example, the fifth valve is an electrically controlled valve, which can be automatically controlled to open or close by a control device.

[0173] In some embodiments, the negative pressure feeding device further includes a pressure sensor 100, which is connected between the receiving cavity 211 and the blower 30, and is used to detect the pressure value inside the receiving cavity 211.

[0174] Optionally, the pressure sensor 100 may be, but is not limited to, a piezoresistive sensor, a piezoelectric sensor, or a capacitive sensor.

[0175] By introducing a pressure sensor 100, real-time monitoring of the internal pressure state of the receiving cavity 211 can be achieved. The pressure sensor 100 can continuously collect pressure data inside the receiving cavity 211, enabling operators to fully understand the pressure change trend during equipment operation, thereby providing reliable data support for process monitoring, fault early warning, and parameter adjustment.

[0176] Furthermore, the pressure sensor 100 can be linked with the control device to form a closed-loop control mechanism. Based on the collected pressure signal, the control device can analyze in real time whether the current operating condition is within the set range, and then control the relevant components to automatically adjust to maintain the pressure stability in the containment cavity 211 and prevent risks caused by abnormal pressure.

[0177] In some embodiments, the negative pressure feeding device further includes a flow sensor 110, which is connected between the hopper 10 and the feed inlet 212 and is used to detect the flow rate of the powder.

[0178] Optionally, the flow sensor 110 may be, but is not limited to, an impeller-type powder flow meter, a turbine flow meter, a capacitive powder flow sensor, or a photoelectric cut-off flow meter.

[0179] By introducing a flow sensor 110, real-time monitoring of the powder flow rate between the hopper 10 and the feed inlet 212 can be achieved. The flow sensor 110 can continuously collect the powder flow rate data between the hopper 10 and the feed inlet 212, enabling operators to fully understand the powder flow rate change trend during equipment operation, thereby providing reliable data support for process monitoring, fault early warning, and parameter adjustment.

[0180] Furthermore, the flow sensor 110 can be linked with the control device to form a closed-loop control mechanism. Based on the collected flow signal, the control device can analyze in real time whether the current operating conditions are within the set range, and then control the relevant components to automatically adjust to maintain the stability of the powder flow and prevent risks caused by abnormal powder flow.

[0181] According to some embodiments of this application, this application also provides a battery production equipment, including a negative pressure feeding device of any of the above schemes.

[0182] In some embodiments, the battery production equipment further includes a control device connected to the negative pressure feeding device, which is used to adjust the working state of the negative pressure feeding device according to the working parameters of the negative pressure feeding device.

[0183] For example, the control device may be connected to at least one of the feeding mechanism 20, the fan 30, the pressure sensor 100, the flow sensor 110, the first valve 50, the second valve 60, the third valve 80, the fourth valve 90, and the fifth valve.

[0184] The operating parameters of the negative pressure feeding device may include, but are not limited to, the operating status of the fan 30, the pressure information detected by the pressure sensor 100, the flow information measured by the flow sensor 110, the on / off status of the first valve 50, the on / off status of the second valve 60, the on / off status of the third valve 80, the on / off status of the fourth valve 90, and the on / off status of the fifth valve.

[0185] Optionally, the control device may be, but is not limited to, a programmable logic controller, an industrial control computer, or an embedded control module.

[0186] By introducing a control device, the operating status of the negative pressure feeding device can be automatically regulated, thereby significantly improving the overall intelligence level and operating efficiency. Furthermore, the control device can be linked with a remote monitoring system to achieve remote, visual management and intelligent scheduling of the entire negative pressure feeding process, further reducing manual intervention and improving operational efficiency.

[0187] To better understand the negative pressure feeding device provided in the embodiments of this application, based on the same inventive concept, embodiments of the above-mentioned negative pressure feeding device in practical applications are described herein.

[0188] This application provides a negative pressure feeding device, which includes a hopper 10, a feeding mechanism 20, a fan 30, a conveying pipe 40, a pressure sensor 100, a flow sensor 110, a first valve 50, a second valve 60, a third valve 80, a fourth valve 90, a fifth valve, and a second filter component 70. The hopper 10 is used to store powder.

[0189] The feeding mechanism 20 includes a tank 21, a first filter component 22, a cylinder 23, a first cleaning component 24, and a second cleaning component 25. The tank 21 includes a receiving cavity 211, a feed inlet 212, a discharge outlet 213, and an exhaust port 214. The first filter component 22 is disposed in the receiving cavity 211 and connected to the inner wall of the tank 21. The first filter component 22 divides the receiving cavity 211 into a first cavity 2111 and a second cavity 2112. The first filter component 22 is used to block powder. The first filter component 22 includes a filter screen and a support frame. The filter screen is connected to the tank 21 through the support frame.

[0190] The first cavity 2111 and the second cavity 2112 are arranged along the axial direction X of the tank body 21. The discharge port 213 is located at one end of the tank body 21 along the axial direction X near the first cavity 2111. The exhaust port 214 is located at one end of the tank body 21 along the axial direction X near the second cavity 2112.

[0191] The hopper 10 is connected to the first chamber 2111 via the inlet 212. The tank 21 is configured to cause the powder entering the first chamber 2111 from the inlet 212 to form a swirling motion around the axis V of the tank 21. The outlet 213 is connected to the first chamber 2111 and is used to output the powder. The blower 30 is connected to the second chamber 2112 via the exhaust port 214 and is used to extract gas from the receiving chamber 211.

[0192] The cylindrical body 23 is disposed inside the first cavity 2111. The cylindrical body 23 has a channel 231, a first port 232 and a second port 233. The first port 232 and the second port 233 are respectively connected to the two ends of the channel 231 along the axial direction X. The channel 231 is connected to the first cavity 2111 through the first port 232 and to the second cavity 2112 through the second port 233.

[0193] At least a portion of the first cleaning component 24 is disposed within the second cavity 2112. The first cleaning component 24 is configured to blow air onto the first filter component 22 to blow powder on the first filter component 22 into the first cavity 2112.

[0194] The second cleaning component 25 is disposed on the outside of the tank 21. The second cleaning component 25 is configured to impact the tank 21 to shake the powder on the inner wall surface of the tank 21 into the first cavity 2111.

[0195] The material conveying pipe 40 is detachably connected between the inlet 212 and the hopper 10. The material conveying pipe 40 includes multiple sub-pipes, which are detachably connected to each other.

[0196] The first valve 50 is connected between the exhaust port 214 and the fan 30. The second valve 60 is connected between the fan 30 and the ambient air. The first valve 50 and the second valve 60 are connected in parallel, and the second valve 60 is located between the first valve 50 and the fan 30. The second filter element 70 is connected between the second valve 60 and the ambient air. The third valve 80 is connected between the hopper 10 and the feed inlet 212. The fourth valve 90 is connected between the feed inlet 212 and the ambient air. The third valve 80 and the fourth valve 90 are connected in parallel, and the fourth valve 90 is located between the third valve 80 and the feed inlet 212. The fifth valve is connected to the discharge port 213.

[0197] Pressure sensor 100 is connected between the receiving cavity 211 and the blower 30, and is used to detect the pressure value inside the receiving cavity 211. Flow sensor 110 is connected between the hopper 10 and the feed inlet 212, and is used to detect the flow rate of the powder.

[0198] The tank 21 of the above technical solution is configured to enable the powder entering the first cavity 2111 from the feed inlet 212 to form a swirling motion around the axis V of the tank 21. That is, after the powder enters the first cavity 2111 from the feed inlet 212, the powder can rotate along the inner wall of the tank 21 to generate centrifugal force, so as to form a swirling motion around the axis V of the tank 21.

[0199] Under the action of centrifugal force, the powder (especially large particles) will be thrown towards the inner wall of the tank 21, thereby reducing the possibility of the powder (especially large particles) coming into contact with the first filter element 22, reducing the risk of the first filter element 22 being blocked or damaged, extending the service life of the first filter element 22, reducing the downtime and maintenance time and cost of the negative pressure feeding device, thereby effectively improving the reliability and working efficiency of the negative pressure feeding device.

[0200] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0201] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A negative pressure feeding device, characterized by, include: A silo is used to store powder materials; The feeding mechanism includes a tank and a first filter component. The tank includes a receiving cavity, a feed inlet, a discharge outlet, and a vent. The first filter component is disposed within the receiving cavity and connected to the inner wall of the tank. The first filter component divides the receiving cavity into a first chamber and a second chamber. The first filter component is used to block the powder. The hopper is connected to the first cavity through the feed inlet, the tank is configured to cause the powder entering the first cavity from the feed inlet to form a swirling motion around the axis of the tank, and the discharge port is connected to the first cavity and is used to output the powder. A fan is connected to the second cavity through the air inlet, and the fan is used to extract gas from the receiving cavity.

2. The negative pressure feeding device according to claim 1, wherein The first cavity and the second cavity are arranged along the axial direction of the tank body, the discharge port is located at one end of the tank body along the axial direction near the first cavity, and the exhaust port is located at one end of the tank body along the axial direction near the second cavity; The tank body includes a first conical section, which is disposed at least around the first cavity; The inner wall surface of the first conical segment is configured as a tapered surface that gradually tapers in the direction from the second cavity to the first cavity.

3. The negative pressure feeding device according to claim 2, wherein The tank body further includes a first extension section, which is connected to one end of the first conical section along the axial direction, and the first extension section is arranged to at least surround the second cavity; In the same plane perpendicular to the axis, the orthographic projection of the first extension overlaps the orthographic projection of the first conical segment.

4. The negative pressure feeding device according to claim 3, wherein A portion of the first extension is disposed around the first cavity, and another portion is disposed around the second cavity; The feed inlet is located in the first extension section.

5. The negative pressure feeding device according to any one of claims 2 to 4, characterized in that, The feeding mechanism also includes a cylinder, which is disposed within the first cavity; The cylinder has a channel, a first port, and a second port. The first port and the second port are respectively connected to the two ends of the channel along the axial direction. The channel is connected to the first cavity through the first port and to the second cavity through the second port.

6. The negative pressure feeding device according to claim 5, wherein The cylindrical body includes a second conical section, the outer wall surface of which is configured as a tapered surface that gradually tapers in the direction from the second cavity to the first cavity.

7. The negative pressure feeding device according to claim 6, wherein The cylindrical body further includes a second extension section, which is connected to one end of the second conical section near the first cavity; In the same plane perpendicular to the axis, the orthographic projection of the second conical segment overlaps the orthographic projection of the second extension segment.

8. The negative pressure feeding device according to any one of claims 1 to 7, characterized in that, The feeding mechanism further includes a first cleaning component, which is connected to the tank and is used to transfer the powder on the first filter component into the first cavity.

9. The negative pressure feeding device according to claim 8, wherein At least a portion of the first cleaning component is disposed within the second cavity, and the first cleaning component is configured to blow air onto the first filter component to blow the powder on the first filter component into the first cavity.

10. The negative pressure feeding device according to any one of claims 1 to 9, wherein The feeding mechanism further includes a second cleaning component, which is connected to the tank and disposed on the outside of the tank. The second cleaning component is configured to impact the tank to shake the powder on the inner wall of the tank into the first cavity.

11. The negative pressure feeding device according to any one of claims 1 to 10, wherein The first filtration component includes a filter screen and a support frame, wherein the filter screen is connected to the tank body via the support frame; The negative pressure feeding device also includes a conveying pipe, which is detachably connected between the feed inlet and the hopper; The material conveying pipeline includes multiple sub-pipes, which are detachably connected to each other.

12. The negative pressure feeding device according to claim 11, wherein The inner wall of the conveying pipe is provided with a wear-resistant layer.

13. The negative pressure feeding device according to any one of claims 1 to 12, characterized in that, The negative pressure feeding device also includes a first valve and a second valve. The first valve is connected between the exhaust port and the fan, and the second valve is connected between the fan and the atmospheric environment. The first valve and the second valve are connected in parallel, and the second valve is located between the first valve and the fan.

14. The negative pressure feeding device according to claim 13, wherein The negative pressure feeding device also includes a second filter component, which is connected between the second valve and the atmospheric environment.

15. The negative pressure feeding device according to any one of claims 1 to 14, wherein The negative pressure feeding device also includes a third valve and a fourth valve. The third valve is connected between the hopper and the feed inlet, and the fourth valve is connected between the feed inlet and the atmospheric environment. The third valve and the fourth valve are connected in parallel, and the fourth valve is located between the third valve and the feed inlet; The negative pressure feeding device also includes a flow sensor, which is connected between the hopper and the feed inlet and is used to detect the flow rate of the powder.

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