Metering device and battery production system

Abstract

The utility model discloses a metering device and a battery production system. The metering device comprises a metering tank, a respirator and a dust removal mechanism. Wherein the metering tank comprises a tank body and a weightometer arranged on the tank body; the respirator is provided with an air inlet and an air outlet, and the air inlet is communicated with the The dust removal mechanism and the respirator are arranged at intervals, and the dust removal mechanism is provided with a dust suction opening corresponding to the air outlet. According to the technical scheme, the possibility of dust explosion is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of metering devices, in particular to a metering device and a battery production system. Background Art

[0002] During the battery production process, a metering device is required to weigh and measure powder materials to ensure accurate addition. This device typically includes a metering tank and a respirator mounted within the tank. However, during actual use, powder materials can leak from the respirator, potentially leading to dust explosions. Utility Model Content

[0003] The main purpose of the utility model is to provide a metering device, aiming to reduce the possibility of dust explosion.

[0004] To achieve the above-mentioned purpose, the metering device proposed in the present invention includes:

[0005] A measuring tank, comprising a tank body and a weighing meter provided on the tank body;

[0006] a respirator, the respirator being provided with an air inlet and an air outlet, the air inlet being connected to the tank body; and

[0007] The dust removal mechanism is spaced apart from the respirator, and the dust removal mechanism is provided with a dust suction port corresponding to the air outlet.

[0008] The technical solution of this utility model is to provide a dust removal mechanism corresponding to the air outlet of the respirator, so that the dust leakage from the air outlet of the respirator can be absorbed and collected through the dust collection port of the dust removal mechanism, thereby reducing the possibility of dust entering the ambient atmosphere and causing a dust explosion. At the same time, the dust removal mechanism in this solution is also spaced apart from the respirator, so that the dust removal mechanism can absorb air from the outside as much as possible during the dust collection operation, thereby reducing the pulling force on the respirator and the possibility of pulling on the measuring tank, thereby improving the weighing accuracy of the measuring device.

[0009] Optionally, the metering device further comprises a flexible air-permeable member, which is connected to the respirator and the dust removal mechanism and encloses the respirator and the dust removal mechanism to form a closed space.

[0010] In this way, the dust removal mechanism can absorb air from the outside and at the same time isolate and block the powder.

[0011] Optionally, the respirator comprises:

[0012] a housing, the housing being provided with the air inlet and the air outlet; and

[0013] The filter element is arranged in the casing, and the air holes of the flexible air-permeable member are larger than the filter holes of the filter element.

[0014] Therefore, when the dust removal mechanism is working, it can absorb as much gas as possible from the outside through the flexible breathable member.

[0015] Optionally, one end of the respirator provided with the air outlet extends into the dust suction port and forms an annular gap with the dust removal mechanism, and the flexible air-permeable member covers the annular gap.

[0016] As a result, the flexible breathable member is in the shape of an annular plate and is arranged horizontally. Even when the flexible breathable member is subjected to a large airflow pulling force, it can only exert a force on the respirator in the horizontal direction at most, and will not cause a pulling force on the respirator in the vertical direction, further reducing the possibility of pulling on the tube body.

[0017] Optionally, the respirator comprises a housing and a filter element disposed in the housing, and the housing is provided with the air inlet and the air outlet;

[0018] In the outlet direction of the air outlet, the projected area of ​​the annular gap is defined as S1, and the inner cross-sectional area of ​​the housing is defined as S2, satisfying the relationship: S1 ≥ S2.

[0019] As a result, the annular gap is made relatively large, thereby facilitating the dust removal mechanism to inhale air from the outside as much as possible when performing dust collection work.

[0020] Optionally, the inner side of the flexible breathable member is detachably connected to the respirator.

[0021] As a result, the flexible breathable member can be easily removed from the respirator for cleaning or replacement.

[0022] Optionally, the metering device further includes an elastic member, which is arranged on the inner side of the flexible breathable member and is arranged around the circumference of the flexible breathable member.

[0023] Therefore, after the flexible breathable member and the respirator are disassembled, the inner side of the flexible breathable member can automatically shrink and close under the action of the elastic member to prevent powder from falling into the annular gap and on the flexible breathable member.

[0024] Optionally, the elastic member is an elastic cord.

[0025] As a result, the elastic member has a simpler structure and a smaller volume, which is beneficial for improving the convenience of its arrangement on the flexible breathable member.

[0026] Optionally, the metering device further comprises a first clamp, which is sleeved on the respirator and cooperates with the respirator to clamp the inner side of the flexible breathable member.

[0027] Thus, the flexible breathable member is clamped and fixed by the first clamp and the respirator, making the fixing method relatively simple, thereby facilitating the assembly and disassembly of the flexible breathable member from the respirator. Furthermore, the flexible breathable member is subjected to a clamping force in the circumferential direction, thereby facilitating improved sealing between the inner side of the flexible breathable member and the respirator at all circumferential locations.

[0028] Optionally, a first groove is provided on the side surface of the respirator, the first groove is arranged around the circumference of the respirator, and the first clamp is sleeved in the first groove.

[0029] Thereby, the installation stability of the first clamp and the clamping stability of the flexible air-permeable member can be improved.

[0030] Optionally, the outer side of the flexible air-permeable member is detachably connected to the dust removal mechanism.

[0031] Thus, the flexible air-permeable member can be easily disassembled and removed from the dust removal mechanism.

[0032] Optionally, the metering device further includes a second clamp, which is sleeved on the dust removal mechanism and cooperates with the dust removal mechanism to clamp the outer side of the flexible air-permeable member.

[0033] Thus, the flexible air-permeable member is clamped and fixed by the second clamp and the dust removal mechanism, making the fixing method relatively simple, thereby facilitating the assembly and disassembly of the flexible air-permeable member from the dust removal mechanism. At the same time, the flexible air-permeable member is subjected to a clamping force in the circumferential direction, thereby facilitating the sealing between the outer side of the flexible air-permeable member and the dust removal mechanism at all locations in the circumferential direction.

[0034] Optionally, a second groove is provided on the side circumferential surface of the dust removal mechanism, the second groove is arranged around the circumference of the dust removal mechanism, and the second clamp is sleeved in the second groove.

[0035] Thereby, the installation stability of the second clamp and the clamping stability of the flexible air-permeable member can be improved.

[0036] Optionally, the flexible breathable member is made of cloth.

[0037] This makes it possible to easily obtain the material of the flexible breathable member at a low cost. Furthermore, when the fabric is contaminated, it will undergo a noticeable color change, making it easier to detect powder leakage from the respirator.

[0038] Optionally, the dust removal mechanism includes:

[0039] A dust extraction pipe, wherein the dust extraction pipe is provided with the dust suction port;

[0040] a filter, the filter being arranged in the dust extraction pipe; and

[0041] An airflow driving component is provided on the dust extraction pipe.

[0042] As a result, the inhaled powder can be directly filtered and collected, and there is no need to perform further processing on the collected powder.

[0043] Optionally, the dust extraction pipe includes:

[0044] a first tube body, wherein the cross-sectional area of ​​the first tube body is reduced in the wind direction of the first tube body, and the dust suction port is provided at an end of the first tube body having a larger cross-sectional area; and

[0045] The second tube body has one end connected to the end of the first tube body away from the dust suction port, and the filter and the airflow driving component are arranged on the second tube body.

[0046] As a result, the dust extraction tube can have a relatively large cross-sectional area at the end closest to the respirator, creating sufficient space for the end of the respirator with the air outlet to be inserted into the first tube body. Meanwhile, the cross-sectional area of ​​the second tube body is relatively small, which helps to increase the pressure and fluidity of the gas flowing through it.

[0047] Optionally, the first tube body includes:

[0048] a first straight cylindrical section, wherein one end of the first straight cylindrical section is provided with the dust suction port;

[0049] a tapered section, wherein an end of the tapered section having a larger cross-sectional area is connected to the first straight cylindrical section; and

[0050] A second straight tube section, one end of the second straight tube section is connected to the end of the tapered section away from the first straight tube section, and the other end is connected to the second tube body.

[0051] Thus, the direction realizes docking communication with the filter and the second tube body.

[0052] Optionally, the first tube body is detachably connected to the second tube body.

[0053] As a result, the first tube body can be removed, making it easier to clean the inside of the first tube body.

[0054] Optionally, the first tube body and the second tube body are threadedly connected.

[0055] This helps to improve the convenience of disassembling and assembling the first tube body.

[0056] Optionally, the filter is located upstream of the dust extraction pipe compared to the airflow driving member.

[0057] This helps reduce the possibility of powder entering the airflow driving component and affecting the life of the airflow driving component, thereby increasing the service life of the airflow driving component.

[0058] Optionally, the metering device further includes a safety valve and a first connecting pipe, wherein the safety valve is connected to the tank body, and the first connecting pipe is connected to the safety valve and the dust extraction pipe;

[0059] Wherein, the communication position between the first communicating pipe and the dust extraction pipe is located upstream of the dust extraction pipe compared to the filter.

[0060] Thus, the safety valve can relieve pressure when the internal pressure of the tank is too high, reducing the possibility of accidents such as explosion caused by excessive internal pressure. The first connecting pipe establishes an indirect connection between the safety valve and the dust extraction pipe, allowing the gas released by the safety valve to be discharged into the dust extraction pipe when the pressure is released, so as to collect the powder leaked from the installation valve.

[0061] Optionally, the metering device further includes a purging mechanism, the purging mechanism includes an air blowing pipe, and the air blowing pipe is connected to the first connecting pipe.

[0062] Thus, the powder retained in the first communicating tube can be blown into the dust extraction pipe for collection, and at the same time, the possibility of the safety valve being blocked and causing failure can be reduced.

[0063] Optionally, the air blowing pipe is connected to an end of the first connecting pipe close to the safety valve;

[0064] And / or, in the up-down direction, the position of the safety valve is higher than the communication position of the air blowing pipe and the dust extraction pipe, and the air blowing pipe is connected to the upper side of the dust extraction pipe.

[0065] This is beneficial to improving the purging and collecting effect of the powder retained in the first communicating tube.

[0066] Optionally, the purge mechanism further includes a first switch valve, which is arranged on the air blowing pipe.

[0067] This facilitates the control of opening and closing the purge mechanism.

[0068] Optionally, the metering device further includes a pressure detector and a controller, the pressure detector is provided on the tank body, and the pressure detector and the first switch valve are electrically connected to the controller.

[0069] In this way, the air blowing mechanism can be automatically opened, thereby improving the degree of automation of the metering device.

[0070] Optionally, the metering device further includes a controller, and the airflow driving element is electrically connected to the controller.

[0071] Therefore, the controller can control the opening and closing of the air flow drive, thereby improving the automation level of the metering device.

[0072] Optionally, the metering device further includes a second communicating pipe and a second switch valve, the second communicating pipe is connected to the tank body and the air inlet, and the second switch valve is provided on the second communicating pipe.

[0073] Therefore, the opening and closing of the second connecting pipe can be conveniently controlled by the second switch valve.

[0074] Optionally, the metering device further includes a controller, and the second switch valve is electrically connected to the controller.

[0075] Thus, the automation level of the metering device can be improved by controlling the opening and closing of the second switch valve by the controller.

[0076] Optionally, the metering device further includes a pressure detector, a controller and an alarm, wherein the pressure detector is provided on the tank body, and the pressure detector and the alarm are electrically connected to the controller.

[0077] Therefore, when the pressure sensor detects that the pressure in the tank is too high, the controller can control the alarm to issue a high-pressure alarm to serve as a prompt.

[0078] The present invention also provides a battery production system, comprising the metering device as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0079] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0080] Figure 1 This is a structural diagram of an embodiment of the metering device of the present utility model;

[0081] Figure 2 for Figure 1 Schematic diagram of the structure of the respirator of the metering device

[0082] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.

[0083] Description of Figure Numbers:

[0084] Label name Label name 100 Metering device 313 Vacuum port 10 Measuring tank 314 Annular gap 11 tank 312a Second groove 111 Pressure detector 315 Conical section 13 weighing scale 316 Second straight section 15 Second connecting pipe 317 Second tube body 151 Second switch valve 33 Air flow drive components 20 respirator 35 Filter 21 chassis 40 Flexible breathable parts 211 air intake 41 elastic parts 213 air outlet 50 First clamp 215 First groove 60 Second clamp 23 filter element 70 Safety valve 25 Blowing parts 80 First connecting pipe 30 Dust removal mechanism 90 Purge mechanism 31 Dust extraction hose 91 Blowpipe 311 first tube body 911 First switch valve 312 First straight tube section

[0085] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0086] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0087] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0088] In this application, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0089] In addition, the descriptions of "first", "second", etc. in this application are for descriptive purposes only and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or a solution in which both A and B are satisfied. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0090] A battery typically includes multiple cells, each of which includes a housing, an electrode assembly within the housing, and an electrolyte. The electrode assembly further includes a positive electrode sheet, a negative electrode sheet, and a separator between the positive and negative electrode sheets. The preparation of the positive and negative electrode sheets requires mixing a powdered active material with a solvent to form a slurry, which is then applied to a current collector.

[0091] In related technologies, to ensure accurate dosing of powdered active materials during the manufacturing process, a metering device is required to weigh and measure the powder. This device typically consists of a metering tank and a respirator mounted within the tank. However, in actual use, due to the high pressure within the metering tank, the powder within the tank may leak through the respirator, leading to dust explosions.

[0092] Therefore, based on the above considerations, and to address the potential for dust explosions during actual use of metering devices in related art, this application proposes a novel metering device. This novel metering device innovatively incorporates a dust removal mechanism with a dust suction port corresponding to the air outlet of the respirator. This mechanism absorbs and collects powder leaking from the respirator, reducing the potential for dust explosions if the powder enters the ambient atmosphere. Furthermore, the dust removal mechanism and the respirator are spaced apart to minimize the potential for strain on the metering tank.

[0093] In addition, it should be noted that the metering device proposed in this application can not only be used to weigh and measure the active materials in the battery field introduced above, but can also be used to weigh and measure other materials, such as flour, etc. As long as the material is in powder form, the metering device proposed in this application can be used.

[0094] Next, the structure of the metering device proposed in this application is explained:

[0095] Please refer to Figure 1 and Figure 2 In one embodiment of the present application, the metering device 100 proposed in the present application includes a metering tank 10, a respirator 20 and a dust removal mechanism 30, the metering tank 10 includes a tank body 11 and a weighing scale 13 arranged on the tank body 11; the respirator 20 is provided with an air inlet 211 and an air outlet 213, and the air inlet 211 is connected to the tank body 11; the dust removal mechanism 30 and the respirator 20 are arranged at intervals, and the dust removal mechanism 30 is provided with a dust suction port 313 corresponding to the air outlet 213.

[0096] The metering tank 10 can form a space for accommodating powder through the tank body 11, and the weight of the powder can be detected by the weighing scale 13. In order to transport the powder into the tank body 11, the tank body 11 can be provided with a feed port, and the feed port can be connected to the auxiliary material bin for accommodating the powder through a pipeline; at the same time, the auxiliary material bin can be connected to an inflatable component, such as a positive pressure tank. In this way, the auxiliary material bin is inflated and pressurized by the inflatable component, so that the powder in the auxiliary material bin can be driven to be transported into the tank body 11. Furthermore, the tank body 11 can also be provided with a drop port, and a control valve can be provided at the drop port to open and close the drop port through the control valve, so that the powder measured by the weighing scale 13 can fall into the stirring device or other devices. In order to facilitate the feed port to be not easily blocked and the discharge of the drop port. When the metering device 100 is in normal use and installation state, with the ground as a reference, the feed port can be set at the upper end of the tank body 11, and the discharge port can be set at the lower end of the tank body 11. Moreover, in order to achieve better guidance of the powder in the tank body 11 to the discharge port, the tank body 11 can be set as a whole in a conical structure, and the cross-sectional area of ​​the upper end is larger than the cross-sectional area of ​​the lower end. Of course, the tank body 11 can also have an upper end portion with a uniform cross-sectional area and a lower end portion with a conical structure. In addition, on the horizontal projection plane, the projection of the tank body 11 can be circular, and of course it can also be square or rectangular, etc. It can be seen that the present application does not limit the shape and structure of the tank body 11. In addition, the weighing scale 13 can be set on the outside of the tank body 11 to avoid its weighing accuracy being affected by the pressure of the tank body 11. At the same time, it can also increase the size of the space inside the tank body 11 for accommodating powder and avoid the problem of powder accumulation on the weighing scale 13.

[0097] The respirator 20 can be used to balance the air pressure inside the tank body 11 and the outside, so that the powder in the tank body 11 can be discharged smoothly through the discharge port. It can be directly arranged on the tank body 11 so that the air inlet 211 is directly connected to the tank body 11. Of course, the respirator 20 can also be connected to the tank body 11 through the second connecting pipe 15 as described below. In addition, the respirator 20 can be arranged at the upper end of the tank body 11 to reduce the possibility that the powder in the tank body 11 will block the communication between the respirator 20 and the tank body 11. In this case, the air inlet 211 can be arranged at the lower end of the respirator 20, and the air outlet 213 can be arranged at the upper end of the respirator 20. Further, the respirator 20 can include a housing 21 and a filter element 23, the housing 21 is provided with an air inlet 211 and an air outlet 213; the filter element 23 is arranged in the housing 21. This allows the respirator 20 to allow air to pass through while also isolating and blocking the powder, thereby reducing the possibility of powder leaking from the respirator 20. In addition, on a horizontal projection plane, the projection of the housing 21 can be circular, but can also be square or rectangular, etc. This application does not limit the shape of the housing 21. The shape of the filter element 23 located inside the housing 21 can be configured to match the shape of the housing 21 to improve the compactness of the distribution between the two. In addition, in the embodiment, the respirator 20 can also include a blowing member 25. The blowing member 25 can be configured to penetrate the housing 21 and be located above the filter element 23 to blow air in the direction from the air outlet 213 toward the air inlet 211, thereby reducing the possibility of powder adhering to the inside of the housing 21 and the filter element 23.

[0098] The dust removal mechanism 30 can be brought close to the air outlet 213 of the respirator 20 through the dust suction port 313 to absorb and collect the powder leaked from the air outlet 213 of the respirator 20. The dust removal mechanism 30 can include a filter 35 as described below, so as to filter and collect the absorbed powder through the filter 35. Of course, the dust removal mechanism 30 can also include a bag or a container, so as to store and collect the absorbed powder through the bag or the container. It can be seen that the present application does not limit the structural type of the dust removal mechanism 30. In addition, the spacing arrangement of the dust removal mechanism 30 and the respirator 20 includes a spacing arrangement in which the respirator 20 is provided with one end of the air outlet 213 inserted into the dust removal mechanism 30 as described below, and a gap is formed with the inner side of the dust removal mechanism 30, and of course also includes a spacing arrangement in which the respirator 20 is completely located outside the dust removal mechanism 30. Furthermore, the number of dust removal mechanisms 30 can correspond to the number of respirators 20. For example, if the number of respirators 20 is one, the number of dust removal mechanisms 30 can also be one. Furthermore, the dust suction port 313 of the dust removal mechanism 30 can be positioned relative to the air outlet 213 of the respirator 20, such that the centerline of the dust suction port 313 is parallel to the centerline of the air outlet 213. Of course, in other embodiments, the centerline of the dust suction port 313 and the centerline of the air outlet 213 can also be positioned at an angle, such as a 135° angle.

[0099] The technical solution of this application provides a dust removal mechanism 30 corresponding to the air outlet 213 of the respirator 20, so that the dust leakage from the air outlet 213 of the respirator 20 can be absorbed and collected through the dust suction port 313 of the dust removal mechanism 30, thereby reducing the possibility of dust entering the ambient atmosphere and causing a dust explosion. At the same time, the dust removal mechanism 30 in this solution is also spaced apart from the respirator 20, so that the dust removal mechanism 30 can absorb air from the outside as much as possible during the dust collection operation, thereby reducing the pulling force on the respirator 20 and the possibility of pulling on the metering tank 10, thereby improving the weighing accuracy of the metering device 100.

[0100] Please refer to Figure 2 and Figure 3 In one embodiment of the present application, the metering device 100 further includes a flexible breathable member 40, which is connected to the respirator 20 and the dust removal mechanism 30, and is enclosed with the respirator 20 and the dust removal mechanism 30 to form a closed space.

[0101] The flexible breathable member 40, that is, it can allow air to pass through, but it has a blocking effect on powder, and it is also a material that can be deformed. Among them, the flexible breathable member 40 can be a cloth as described below, of course, it can also be a breathable membrane. This application does not limit the material of the flexible breathable member 40. In addition, when one end of the respirator 20 provided with the air outlet 213 as described above is inserted into the dust removal mechanism 30, the flexible breathable member 40 can be a ring plate structure as described below. When the respirator 20 is completely located outside the dust removal mechanism 30, the flexible breathable member 40 can be a cylindrical structure. It can be seen that this application does not limit the structural form of the flexible breathable member 40. In addition, the connection between the flexible breathable member 40 and the respirator 20 and the dust removal mechanism 30 can be a detachable clamping connection through a clamp as described below, of course, it can also be an adhesive connection, etc. This application does not limit this.

[0102] In this embodiment, the gap formed between the respirator 20 and the dust removal mechanism 30 can be sealed by the flexible breathable member 40, so that a closed space can be formed between them. At this time, the external airflow can enter between the respirator 20 and the dust removal mechanism 30 through the flexible breathable member 40 to meet the air supply requirements of the dust removal mechanism 30. At the same time, it can also isolate and block the powder between the respirator 20 and the dust removal mechanism 30, further reducing the possibility of the powder entering the external atmosphere, thereby further reducing the possibility of dust explosions. At the same time, because the flexible breathable member 40 can be deformed, the dust removal mechanism 30 can also deform accordingly when performing dust collection work, even if it is subjected to a large airflow pulling force, thereby reducing the possibility of the airflow pulling force being transmitted to the respirator 20.

[0103] In one embodiment of the present application, the air holes of the flexible air-permeable member 40 are larger than the filter holes of the filter element 23 .

[0104] The air holes are larger than the filter holes, that is, the air permeability of the flexible air-permeable member 40 is greater than the air permeability of the filter element 23 .

[0105] In this embodiment, the air permeability of the flexible breathable member 40 is set to be relatively large, so that when the dust removal mechanism 30 is working, it can absorb a large amount of gas from the outside through the flexible breathable member 40 as much as possible, and the small amount of gas leaked from the respirator 20 can follow the large amount of gas into the dust removal mechanism 30 through the dust extraction port, further reducing the possibility of the dust removal mechanism 30 causing pulling on the tank body 11 when working.

[0106] Please refer to Figure 2 and Figure 3In one embodiment of the present application, the respirator 20 is provided with an air outlet 213 at one end thereof extending into the dust suction port 313 and enclosing an annular gap 314 with the dust removal mechanism 30 , and the flexible air permeable member 40 covers the annular gap 314 .

[0107] When the dust suction port 313 has a relatively long extension length, for example, the wall defining the dust suction port 313 is relatively thick, the respirator 20 can extend only into the dust suction port 313. When the dust suction port 313 has a relatively short extension length, for example, the wall defining the dust suction port 313 is relatively thin, or one end of the dust removal mechanism 30 is open to directly form the dust suction port 313, the respirator 20 can extend into the dust removal mechanism 30 after passing through the dust suction port 313. Furthermore, the flexible air-permeable member 40 can be located within or outside the annular gap 314.

[0108] In this embodiment, the end of the respirator 20 with the air outlet 213 is inserted into the dust suction port 313, forming a neatly shaped annular gap 314 between the two, thereby facilitating coverage by the flexible breathable member 40. Furthermore, the flexible breathable member 40 is annular and horizontally arranged. Therefore, even when the flexible breathable member 40 is subjected to a strong pulling force from the airflow, the force applied to the respirator 20 is only applied horizontally, without causing any vertical pulling force on the respirator 20. This further reduces the possibility of pulling on the tube body.

[0109] In one embodiment of the present application, in the outlet direction of the air outlet 213 , the projected area of ​​the annular gap 314 is defined as S1 , and the inner cross-sectional area of ​​the housing 21 is defined as S2 , satisfying the relationship: S1 ≥ S2 .

[0110] The air outlet direction of the air outlet 213 can also be referred to as the up-down direction. The inner cross-sectional area of ​​the housing 21 can also be referred to as the projected area of ​​the channel inside the housing 21 as described above.

[0111] In this embodiment, S1 is set to be greater than or equal to S2, so that the annular gap 314 is relatively large, thereby facilitating the dust removal mechanism 30 to absorb air from the outside as much as possible when performing dust collection work.

[0112] Please refer to Figure 2 and Figure 3 In one embodiment of the present application, the inner side of the flexible breathable member 40 is detachably connected to the respirator 20 .

[0113] The detachable connection means that the inner side of the flexible breathable member 40 can be removed after being installed on the respirator 20. The detachable connection between the flexible breathable member 40 and the respirator 20 can be a clamping connection as described below, or it can be a tightening fixation via screws, or a rotatable clamping plate and a torsion spring provided on the respirator 20 to compress and secure the flexible breathable member 40. This application does not limit the method of detachable connection between the flexible breathable member 40 and the respirator 20.

[0114] In this embodiment, the flexible air-permeable member 40 and the respirator 20 are provided with a detachable connection, so that the flexible air-permeable member 40 can be easily removed from the respirator 20 for cleaning or replacement.

[0115] Please refer to Figure 2 and Figure 3 In one embodiment of the present application, the metering device 100 further includes an elastic member 41 , which is disposed on the inner side of the flexible breathable member 40 and surrounds the flexible breathable member 40 along a circumferential direction.

[0116] The elastic member 41 is an object that can undergo elastic deformation. The elastic member 41 can be an elastic rope as described below, or a rubber band or a spring, etc. The present application does not limit the structural type of the elastic member 41.

[0117] In this embodiment, a circle of elastic member 41 is provided on the inner side of the flexible breathable member 40, so that after the flexible breathable member 40 and the respirator 20 are disassembled, the inner side of the flexible breathable member 40 can automatically shrink and close under the action of the elastic member 41, so as to prevent the powder in the annular gap 314 and on the flexible breathable member 40 from falling, thereby improving the collection effect of the powder leaked from the respirator 20.

[0118] In one embodiment of the present application, the elastic member 41 is an elastic cord.

[0119] In this embodiment, the elastic member 41 is configured as an elastic cord, which makes the elastic member 41 simpler in structure and smaller in size, thereby facilitating its placement on the flexible breathable member 40. In this case, the elastic cord can be disposed on the surface of the flexible breathable member 40 or in the interior space of the flexible breathable member 40.

[0120] Please refer to Figure 2 and Figure 3 In one embodiment of the present application, the metering device 100 further includes a first clamp 50 , which is sleeved on the respirator 20 and cooperates with the respirator 20 to clamp the inner side of the flexible breathable member 40 .

[0121] In this embodiment, the flexible breathable member 40 is clamped and fixed by the first clamp 50 and the respirator 20, making the fixing method relatively simple, thereby facilitating improved assembly and disassembly of the flexible breathable member 40 on the respirator 20. At the same time, the flexible breathable member 40 is subjected to a clamping force in the circumferential direction, thereby facilitating improved sealing between the inner side of the flexible breathable member 40 and the respirator 20 at various circumferential locations. Furthermore, there is no need to provide a connecting structure on the flexible breathable member 40, thereby facilitating improved protection of the structure of the flexible breathable member 40 itself. Specifically, when an elastic member 41 is provided on the inner side of the flexible breathable member 40 as described above, the elastic member 41 can be located further inward than the first clamp 50.

[0122] Please refer to Figure 2 and Figure 3 In one embodiment of the present application, a first groove 215 is provided on the side surface of the respirator 20 . The first groove 215 is arranged around the circumference of the respirator 20 , and the first clamp 50 is sleeved in the first groove 215 .

[0123] The first groove 215 may be formed by a local depression of the side surface of the housing 21 of the respirator 20 , or may be formed by a convex rib provided on the side surface of the housing 21 and enclosed by the rib and the side surface of the housing 21 .

[0124] In this embodiment, the first clamp 50 is installed in the first groove 215 and cooperates with the groove wall of the first groove 215 to clamp the flexible breathable member 40, which can improve the installation stability of the first clamp 50 and the stability of the flexible breathable member 40 being clamped.

[0125] Similarly, in order to facilitate the removal of the flexible air-permeable member 40 from the dust removal mechanism 30 , in one embodiment of the present application, the outer side of the flexible air-permeable member 40 is detachably connected to the dust removal mechanism 30 .

[0126] The detachable connection between the flexible air-permeable member 40 and the dust-removing mechanism 30 can be a clamping connection as described below, or can be a tightening fixation by inserting screws, or a rotatable pressing plate provided on the dust-removing mechanism 30 and equipped with a torsion spring to compress and fix the flexible air-permeable member 40 via the pressing plate. This application does not limit the manner in which the flexible air-permeable member 40 and the dust-removing mechanism 30 can be detachably connected.

[0127] Please refer to Figure 2 and Figure 3 In one embodiment of the present application, the metering device 100 further includes a second clamp 60 , which is sleeved on the dust removal mechanism 30 and cooperates with the dust removal mechanism 30 to clamp the outer side of the flexible breathable member 40 .

[0128] In this embodiment, the flexible air-permeable member 40 is clamped and secured by the second clamp 60 and the dust removal mechanism 30, simplifying the securing method and facilitating easy assembly and disassembly of the flexible air-permeable member 40 from the dust removal mechanism 30. This also ensures that the flexible air-permeable member 40 is subjected to a clamping force circumferentially, thereby improving the seal between the outer side of the flexible air-permeable member 40 and the dust removal mechanism 30 at all circumferential locations. Furthermore, this eliminates the need for a connecting structure on the flexible air-permeable member 40, thereby enhancing the structural protection of the flexible air-permeable member 40.

[0129] Please refer to Figure 2 and Figure 3 In one embodiment of the present application, a second groove 312a is provided on the side surface of the dust removal mechanism 30. The second groove 312a is arranged around the circumference of the dust removal mechanism 30, and the second clamp 60 is sleeved in the second groove 312a.

[0130] The second groove 312 a may be formed by a local depression of the side surface of the dust removal mechanism 30 , or may be formed by a convex rib provided on the side surface of the dust removal mechanism 30 , which is enclosed by the convex rib and the side surface of the dust removal mechanism 30 .

[0131] In this embodiment, the second clamp 60 is installed in the second groove 312a and cooperates with the groove wall of the second groove 312a to clamp the flexible breathable member 40, which can improve the installation stability of the second clamp 60 and the stability of the flexible breathable member 40 being clamped.

[0132] In one embodiment of the present application, the flexible breathable member 40 is made of cloth.

[0133] In this embodiment, the flexible breathable member 40 is made of cloth, which makes the material of the flexible breathable member 40 easily available and low in cost. Furthermore, the cloth will change color significantly when contaminated, making it easier to detect powder leakage from the respirator 20.

[0134] Please refer to Figure 1 and Figure 2 In one embodiment of the present application, the dust removal mechanism 30 includes a dust extraction pipe 31, a filter 35 and an airflow driving member 33. The dust extraction pipe 31 is provided with a dust suction port 313; the filter 35 is provided in the dust extraction pipe 31; and the airflow driving member 33 is provided in the dust extraction pipe 31.

[0135] The dust extraction tube 31 can be used to connect a filter 35 and an airflow driver 33 in series. The dust extraction tube 31 can be linear as a whole, or it can include at least two linear segments arranged at an angle. For example, the portion near the respirator 20 extends vertically, while the filter 35 and airflow driver 33 extend horizontally in series to improve the compactness of the distribution between the respirator 20, the filter 35, and the airflow driver 33. The filter 35 can be used to filter and collect powder passing through it. The filter 35 can be a high-efficiency filter 35 to improve the filtering effect. Alternatively, the filter 35 can be a medium-efficiency filter 35, etc. This application does not limit the structural type of the filter 35. The airflow driver 33 can be used to drive airflow from the dust suction port 313 into the dust extraction tube 31 to achieve dust collection. The airflow driver 33 can be a fan, or alternatively, a negative pressure tank, etc. This application does not limit the structural type of the airflow driver 33. In addition, in the pipeline of the dust extraction pipe 31 , the filter 35 and the airflow driving member 33 can be located upstream, or the airflow driving member 33 can be located upstream.

[0136] In this embodiment, the dust removal mechanism 30 is configured to include a dust extraction pipe 31, a filter 35 and an air flow driving member 33, so that the inhaled powder can be directly filtered and collected, and there is no need to further process the collected powder.

[0137] Please refer to Figures 1 to 3 In one embodiment of the present application, the dust extraction pipe 31 includes a first tube body 311 and a second tube body 317. In the wind direction of the first tube body 311, the cross-sectional area of ​​the first tube body 311 is reduced, and the end of the first tube body 311 with a larger cross-sectional area is provided with a dust suction port 313; one end of the second tube body 317 is connected to the end of the first tube body 311 away from the dust suction port 313, and the filter 35 and the airflow driving component 33 are provided in the second tube body 317.

[0138] The first tube body 311 can be arranged in the up-down direction. And in the direction from bottom to top, the cross-sectional area of ​​the first tube body 311 can be reduced as a whole, for example, the whole is conical, or it can be partially reduced, for example, as described below, the middle is set as a conical section 315, and the upper and lower sections are set as straight sections. The first groove 215 described above can be set on the first tube body 311. The second tube body 317 can be partially extended in the up-down direction as described above to connect with the first tube body 311, and the other part can be extended in the horizontal direction to connect the filter 35 and the airflow drive member 33 in series. In addition, the first tube body 311 and the second tube body 317 can be detachably connected as described below, or they can be fixedly connected (for example, adhesively connected, etc.) or arranged as an integral structure.

[0139] In this embodiment, the cross-sectional area of ​​the first tube 311 is configured to decrease along the airflow direction of the first tube 311. This allows the dust extraction tube 31 to have a relatively large cross-sectional area at the end closest to the respirator 20, thereby creating sufficient space for the end of the respirator 20 with the air outlet 213. Simultaneously, the cross-sectional area of ​​the second tube 317 is relatively small, which helps increase the pressure and fluidity of the gas flowing through it, thereby improving the dust removal effect.

[0140] Please refer to Figure 2 In one embodiment of the present application, the first tube body 311 includes a first straight tube section 312, a tapered section 315 and a second straight tube section 316. One end of the first straight tube section 312 is provided with a dust suction port 313; the end of the tapered section 315 with a larger cross-sectional area is connected to the first straight tube section 312; one end of the second straight tube section 316 is connected to the end of the tapered section 315 away from the first straight tube section 312, and the other end is connected to the second tube body 317.

[0141] The straight section, that is, the cross-sectional area is equal at all points in the vertical direction. Because the cross-sectional area of ​​the lower end of the tapered section 315 is larger than that of the upper end, the cross-sectional area of ​​the first straight section 312 is larger than that of the second straight section 316. Furthermore, the first groove 215 described above can be provided on the first straight section 312, with the annular gap 314 formed by the first straight section 312 and the lateral surface of the end of the respirator 20 where the air outlet 213 is formed.

[0142] In this embodiment, the first tube body 311 includes a first straight tube section 312, a tapered section 315 and a second straight tube section 316, so that a dust suction port 313 with a larger cross-sectional area is formed in the direction of the first straight tube section 312, and is inserted and matched with the upper end of the respirator 20; the second straight tube section 316 can facilitate the docking and connection of the second tube body 317 with a relatively smaller cross-sectional area; the middle tapered section 315 can realize the docking and connection of the first straight tube section 312 and the second straight tube section 316 with different cross-sectional areas.

[0143] In one embodiment of the present application, the first tube 311 is detachably connected to the second tube 317 .

[0144] The first tube 311 is detachably connected, that is, the first tube 311 can be removed after being installed on the second tube 317. The connection between the first tube 311 and the second tube 317 can be a threaded connection as described below, or a magnetic connection or a snap connection, etc., which is not limited in this application.

[0145] In this embodiment, the first tube body 311 is provided with a detachable connection, so that the first tube body 311 can be detached and removed from the second tube body 317 , thereby facilitating cleaning of the inner side of the first tube body 311 .

[0146] In one embodiment of the present application, the first tube 311 and the second tube 317 are threadedly connected.

[0147] In this embodiment, the first tube body 311 and the second tube body 317 are arranged to be threadedly connected, which can make the connection between the two simpler, thereby facilitating the assembly and disassembly of the first tube body 311 .

[0148] Please refer to Figure 1 In one embodiment of the present application, the filter 35 is located upstream of the dust extraction pipe 31 compared to the airflow driving member 33 .

[0149] Upstream is the location where the airflow passes first.

[0150] In this embodiment, the filter 35 is arranged at the front end of the air flow driving member 33, so that the air flow can be filtered by the filter 35 before passing through the air flow driving member 33, which is beneficial to reduce the possibility of powder entering the air flow driving member 33 and affecting the life of the air flow driving member 33, thereby increasing the service life of the air flow driving member 33.

[0151] Please refer to Figure 1 In one embodiment of the present application, the metering device 100 also includes a safety valve 70 and a first connecting pipe 80, the safety valve 70 is connected to the tank body 11, and the first connecting pipe 80 is connected to the safety valve 70 and the dust extraction pipe 31; wherein, the connecting position of the first connecting pipe 80 and the dust extraction pipe 31 is located upstream of the dust extraction pipe 31 compared to the filter 35.

[0152] The safety valve 70 can be opened to release pressure when the pressure in the tank body 11 is too high. The safety valve 70 can be directly set on the tank body 11 to communicate with the tank body 11. Of course, the safety valve 70 can also be connected to the tank body 11 through a pipeline. The setting position of the safety valve 70 can be set at the upper end of the tank body 11, or it can be set on one side of the circumference of the tank body 11. The first connecting pipe 80 can be set between the safety valve 70 and the dust extraction pipe 31 to connect the two. When the dust extraction pipe 31 includes the first tube body 311 and the second tube body 317 as described above, the end of the dust extraction pipe 31 away from the safety valve 70 can be connected to the second tube body 317.

[0153] In this embodiment, the safety valve 70 can relieve pressure when the internal pressure of the tank body 11 is too high, reducing the possibility of accidents such as explosion of the tank body 11 due to excessive internal pressure. Furthermore, the first connecting pipe 80 establishes indirect communication between the safety valve 70 and the dust extraction pipe 31, allowing the gas discharged from the safety valve 70 into the dust extraction pipe 31 when the pressure is released, thereby collecting powder leaking from the mounting valve and further reducing the possibility of powder entering the external atmosphere and causing a dust explosion.

[0154] Please refer to Figure 1 In one embodiment of the present application, the metering device 100 further includes a purge mechanism 90 , the purge mechanism 90 includes an air blowing pipe 91 , and the air blowing pipe 91 is connected to the first connecting pipe 80 .

[0155] The purge mechanism 90 can blow air through the air blowing pipe 91 to form an air flow from the air blowing pipe 91 into the first connecting pipe 80. The purge mechanism 90 can also include a positive pressure tank or a blower connected to the air blowing pipe 91 to drive the gas flow.

[0156] In this embodiment, by providing a purge mechanism 90, the powder retained in the first connecting pipe 80 can be purged into the dust extraction pipe 31 for collection. At the same time, the possibility of the first connecting pipe 80 being blocked and causing the safety valve 70 to fail can be reduced.

[0157] Please refer to Figure 1 In one embodiment of the present application, the air blowing pipe 91 is connected to one end of the first connecting pipe 80 close to the safety valve 70 .

[0158] In this embodiment, the air blowing pipe 91 is arranged close to the safety valve 70 so that the gas blown out by the purge mechanism 90 can enter the dust extraction pipe 31 after passing through the first connecting pipe 80 as much as possible, thereby facilitating the improvement of the purge and collection effect of the powder retained in the first connecting pipe 80.

[0159] Please refer to Figure 1 In one embodiment of the present application, in the up and down directions, the position of the safety valve 70 is higher than the connection position of the air blowing pipe 91 and the dust extraction pipe 31, and the air blowing pipe 91 is connected to the upper side of the dust extraction pipe 31.

[0160] In the up and down direction, that is, when the metering device 100 is in a normal use and installation state as described above, the up and down direction is defined with the ground as a reference.

[0161] In this embodiment, the safety valve 70 is set at a relatively high position, and the air blowing pipe 91 is also higher than the dust extraction pipe 31, so that when the pressure relief valve is closed, the powder in the dust extraction pipe 31 will not fall into the first connecting pipe 80 and accumulate.

[0162] Please refer to Figure 1 In one embodiment of the present application, the purge mechanism 90 further includes a first switch valve 911 , which is disposed on the air blowing pipe 91 .

[0163] The first switch valve 911 can be used to control the opening and closing of the air blowing pipe 91. The first switch valve 911 can be a manual valve or an electric valve.

[0164] In this embodiment, by providing the first switch valve 911 , it is convenient to control the opening and closing of the purge mechanism 90 .

[0165] Please refer to Figure 1 In one embodiment of the present application, the metering device 100 further includes a pressure detector 111 and a controller. The pressure detector 111 is provided in the tank body 11 . The pressure detector 111 and the first switch valve 911 are electrically connected to the controller.

[0166] The pressure detector 111 can be used to detect the air pressure within the tank 11 and transmit a signal to the controller, which then controls the opening of the first on-off valve 911 based on the air pressure. The pressure detector 111 can be located outside the tank 11 and can be a remote pressure gauge to facilitate electrical connection with the first on-off valve 911 and the controller. The controller can be located outside the tank 11 or on another object.

[0167] In this embodiment, the air pressure in the tank body 11 can be detected by pressure detection, and when the pressure in the tank body 11 is too high, the controller can be cooperated to automatically open the blowing mechanism, thereby improving the degree of automation of the metering device 100.

[0168] In one embodiment of the present application, the airflow driving member 33 is electrically connected to the controller.

[0169] In this embodiment, the controller controls the opening and closing of the airflow driving member 33 , thereby improving the automation level of the metering device 100 .

[0170] Please refer to Figure 1 In one embodiment of the present application, the metering device 100 further includes a second connecting pipe 15 and a second switch valve 151 . The second connecting pipe 15 is connected to the tank body 11 and the air inlet 211 . The second switch valve 151 is provided in the second connecting pipe 15 .

[0171] In this embodiment, the second connecting pipe 15 can provide an installation position for installing the second switch valve 151, and the second switch valve 151 can conveniently control the opening and closing of the second connecting pipe 15. The second switch valve 151 can be a manual valve or an electrically controlled valve.

[0172] In one embodiment of the present application, the second switch valve 151 is electrically connected to the controller.

[0173] In this embodiment, the controller controls the opening and closing of the second switch valve 151 , thereby improving the automation level of the metering device 100 .

[0174] In one embodiment of the present application, the metering device 100 further includes an alarm, which is electrically connected to the controller.

[0175] In this embodiment, when the pressure sensor detects that the pressure in the tank body 11 is too high, the controller can be used to control the alarm to issue a high pressure alarm so as to serve as a prompt. Wherein, the alarm can be set on the outside of the tank body 11, or of course, it can also be set on other objects.

[0176] Please refer to Figures 1 to 3In one embodiment of the present application, a metering device 100 includes a metering tank 10, a respirator 20, and a dust removal mechanism 30. The metering tank 10 includes a tank body 11 and a weighing scale 13 provided on the tank body 11. The respirator 20 is provided with an air inlet 211 and an air outlet 213, and the air inlet 211 is connected to the tank body 11. The dust removal mechanism 30 and the respirator 20 are spaced apart, and the dust removal mechanism 30 is provided with a dust suction port 313 corresponding to the air outlet 213. The metering device 100 also includes a flexible breathable member 40. The flexible breathable member 40 is connected to the respirator 20 and the dust removal mechanism 30, and encloses the respirator 20 and the dust removal mechanism 30 to form a closed space. The respirator 20 includes a housing 21 and a filter element 23. The housing 21 is provided with an air inlet 211 and an air outlet 213. The filter element 23 is provided in the housing 21, and the air pores of the flexible breathable member 40 are larger than the filter pores of the filter element 23. The respirator 20 is provided with an air outlet 213, one end of which extends into the dust suction port 313 and encloses an annular gap 314 with the dust removal mechanism 30. The flexible air-permeable member 40 covers the annular gap 314. In the outlet direction of the air outlet 213, the projected area of ​​the annular gap 314 is defined as S1, and the inner cross-sectional area of ​​the housing 21 is S2, satisfying the relationship: S1 ≥ S2. The inner side of the flexible air-permeable member 40 is detachably connected to the respirator 20. The metering device 100 also includes an elastic member 41, which is provided on the inner side of the flexible air-permeable member 40 and is arranged around the circumference of the flexible air-permeable member 40. The elastic member 41 is an elastic rope. The metering device 100 also includes a first clamp 50, which is sleeved on the respirator 20 and cooperates with the respirator 20 to clamp the inner side of the flexible air-permeable member 40. The side surface of the respirator 20 is provided with a first groove 215, which extends circumferentially around the respirator 20. The first clamp 50 is mounted within the first groove 215. The outer side of the flexible air-permeable member 40 is detachably connected to the dust removal mechanism 30. The metering device 100 also includes a second clamp 60, which is mounted on the dust removal mechanism 30 and cooperates with the dust removal mechanism 30 to clamp the outer side of the flexible air-permeable member 40. The side surface of the dust removal mechanism 30 is provided with a second groove 312a, which extends circumferentially around the dust removal mechanism 30. The second clamp 60 is mounted within the second groove 312a. The flexible air-permeable member 40 is made of fabric. The dust removal mechanism 30 includes a dust extraction pipe 31, a filter 35, and an airflow drive member 33. The dust extraction pipe 31 has a dust suction port 313; the filter 35 is mounted on the dust extraction pipe 31; and the airflow drive member 33 is mounted on the dust extraction pipe 31. The dust extraction pipe 31 includes a first tube body 311 and a second tube body 317. In the wind direction of the first tube body 311, the cross-sectional area of ​​the first tube body 311 is set to be reduced, and the end of the first tube body 311 with a larger cross-sectional area is provided with a dust suction port 313; one end of the second tube body 317 is connected to the end of the first tube body 311 away from the dust suction port 313, and the filter 35 and the airflow driving component 33 are arranged on the second tube body 317.The first tube 311 includes a first straight section 312, a tapered section 315, and a second straight section 316. A dust suction port 313 is provided at one end of the first straight section 312. The end of the tapered section 315 with a larger cross-sectional area is connected to the first straight section 312. One end of the second straight section 316 is connected to the end of the tapered section 315 away from the first straight section 312, and the other end is connected to the second tube 317. The first tube 311 is detachably connected to the second tube 317. The first and second tubes 311 and 317 are threadedly connected. The filter 35 is located upstream of the airflow drive 33 in the dust extraction pipe 31. The metering device 100 also includes a safety valve 70 and a first connecting pipe 80. The safety valve 70 is connected to the tank 11, and the first connecting pipe 80 connects the safety valve 70 to the dust extraction pipe 31. The connection between the first connecting pipe 80 and the dust extraction pipe 31 is located upstream of the filter 35 in the dust extraction pipe 31. The metering device 100 also includes a purge mechanism 90, which includes an air blow pipe 91 connected to the first connecting pipe 80. The air blow pipe 91 is connected to the end of the first connecting pipe 80 near the safety valve 70. In the vertical direction, the safety valve 70 is located above the connection point between the air blow pipe 91 and the dust extraction pipe 31, and the air blow pipe 91 is connected to the upper side of the dust extraction pipe 31. The purge mechanism 90 also includes a first on-off valve 911, which is located on the air blow pipe 91. The metering device 100 also includes a pressure detector 111 and a controller. The pressure detector 111 is located in the tank body 11. The pressure detector 111 and the first on-off valve 911 are electrically connected to the controller. The airflow drive element 33 is electrically connected to the controller. The metering device 100 also includes a second connecting pipe 15 and a second on-off valve 151. The second connecting pipe 15 connects the tank body 11 and the air inlet 211. The second on-off valve 151 is located in the second connecting pipe 15. The second switch valve 151 is electrically connected to the controller. The metering device 100 further includes an alarm, which is electrically connected to the controller.

[0177] In one embodiment of the present application, the dust removal mechanism 30 can be used as follows: after the metering device 100 is activated, the controller can control the second on-off valve 151 and the airflow drive 33 to open to collect powder leaked from the respirator 20. The purge mechanism 90 can be used as follows: First, when the pressure detector 111 detects that the pressure within the tank 11 is high and reaches a first preset pressure value, for example, 85% of the trip pressure of the safety valve 70, the controller can control the alarm to sound a high-pressure alarm. Second, when the pressure detector 111 detects that the pressure within the tank 11 has further increased and reached a second preset pressure value, for example, 90% of the trip pressure of the safety valve 70, the airflow drive 33 can be opened if it is closed. Third, the pressure within the tank 11 can be continuously monitored by the pressure detector 111. If the pressure is detected to be decreasing, the process can return to the first step; if the pressure is detected to be continuing to rise, the process can proceed to the fourth step. Fourth, when the pressure within the tank 11 reaches the trip pressure of the safety valve 70, the safety valve 70 trips. In the fifth step, the pressure in the tank body 11 is continuously detected by the pressure detection component, and the controller is coordinated to determine: (1) whether the pressure in the tank body 11 is greater than or equal to the trip pressure of the safety valve 70 within the preset time; (2) whether the pressure in the tank body 11 is less than or equal to the return pressure of the safety valve 70, and the duration is greater than or equal to the preset time, for example, 5 seconds. If either of the two conditions is met at the same time, the first switch valve 911 is automatically opened, and the purge mechanism 90 is used to purge for a preset time, for example, 20 seconds. In the sixth step, the air flow drive component 33 and the first switch valve 911 are closed, completing the purge of the powder in the first connecting pipe 80.

[0178] The present application also proposes a battery production system, which includes a metering device 100. The specific structure of the metering device 100 refers to the above embodiment. Since the present battery production system adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here. Among them, the battery production system can also include an auxiliary material bin, a conveying device, and a stirring device. The auxiliary material bin can be used for temporary storage of powder, and the metering tank 10 can be connected to the auxiliary material bin to weigh the amount of powder that falls in. The conveying device can be connected to the metering tank 10 so that the powder falling from the metering tank 10 can be transported to the stirring device through the conveying device.

[0179] The above description is only a preferred embodiment of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made by using the contents of the present application description and drawings under the inventive concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A metering device, characterized in that: include: A measuring tank, comprising a tank body and a weighing meter provided on the tank body; A respirator, the respirator being provided with an air inlet and an air outlet, the air inlet being connected to the tank body; as well as The dust removal mechanism is spaced apart from the respirator, and the dust removal mechanism is provided with a dust suction port corresponding to the air outlet.

2. The metering device according to claim 1, wherein The metering device further comprises a flexible air-permeable member, which is connected to the respirator and the dust removal mechanism and encloses the respirator and the dust removal mechanism to form a closed space.

3. The metering device according to claim 2, characterized in that The respirator comprises: a housing, the housing being provided with the air inlet and the air outlet; and The filter element is arranged in the casing, and the air holes of the flexible air-permeable member are larger than the filter holes of the filter element.

4. The metering device according to claim 2, wherein: One end of the respirator provided with the air outlet extends into the dust suction port and is enclosed with the dust removal mechanism to form an annular gap, and the flexible air-permeable member covers the annular gap.

5. The metering device according to claim 4, characterized in that The respirator comprises a housing and a filter element arranged in the housing, and the housing is provided with the air inlet and the air outlet; In the outlet direction of the air outlet, the projected area of ​​the annular gap is defined as S1, and the inner cross-sectional area of ​​the housing is defined as S2, satisfying the relationship: S1 ≥ S2.

6. The metering device according to claim 4, characterized in that The inner side of the flexible air-permeable member is detachably connected to the respirator.

7. The metering device according to claim 6, characterized in that The metering device further includes an elastic member, which is arranged on the inner side of the flexible air-permeable member and surrounds the flexible air-permeable member along the circumference.

8. The metering device according to claim 7, characterized in that The elastic member is an elastic rope.

9. The metering device according to claim 8, characterized in that The metering device further comprises a first clamp, which is sleeved on the respirator and cooperates with the respirator to clamp the inner side of the flexible air-permeable member.

10. The metering device according to claim 9, characterized in that A first groove is provided on the side surface of the respirator. The first groove is arranged around the circumference of the respirator. The first clamp is sleeved in the first groove.

11. The metering device according to claim 4, wherein The outer side of the flexible air-permeable member is detachably connected to the dust removal mechanism.

12. The metering device according to claim 11, wherein The metering device further includes a second clamp, which is sleeved on the dust removal mechanism and cooperates with the dust removal mechanism to clamp the outer side of the flexible air-permeable member.

13. The metering device according to claim 12, wherein: A second groove is provided on the side circumferential surface of the dust removal mechanism. The second groove is arranged around the circumference of the dust removal mechanism, and the second clamp is sleeved in the second groove.

14. The metering device according to claim 2, wherein: The flexible breathable member is made of cloth.

15. The metering device according to any one of claims 1 to 14, characterized in that The dust removal mechanism comprises: A dust extraction pipe, wherein the dust extraction pipe is provided with the dust suction port; a filter, the filter being arranged in the dust extraction pipe; and An airflow driving component is provided on the dust extraction pipe.

16. The metering device according to claim 15, wherein The dust extraction pipe comprises: a first tube body, wherein the cross-sectional area of ​​the first tube body is reduced in the wind direction of the first tube body, and the dust suction port is provided at an end of the first tube body having a larger cross-sectional area; and The second tube body has one end connected to the end of the first tube body away from the dust suction port, and the filter and the airflow driving component are arranged on the second tube body.

17. The metering device according to claim 16, wherein The first tube body includes: a first straight cylindrical section, wherein one end of the first straight cylindrical section is provided with the dust suction port; a tapered section, wherein an end of the tapered section having a larger cross-sectional area is connected to the first straight cylindrical section; and A second straight tube section, one end of the second straight tube section is connected to the end of the tapered section away from the first straight tube section, and the other end is connected to the second tube body.

18. The metering device according to claim 16, wherein The first tube body is detachably connected to the second tube body.

19. The metering device according to claim 18, wherein The first tube body and the second tube body are threadedly connected.

20. The metering device according to claim 15, wherein The filter is located upstream of the dust extraction pipe compared to the airflow driving member.

21. The metering device according to claim 15, wherein The metering device further includes a safety valve and a first connecting pipe, wherein the safety valve is connected to the tank body, and the first connecting pipe is connected to the safety valve and the dust extraction pipe; Wherein, the communication position between the first communicating pipe and the dust extraction pipe is located upstream of the dust extraction pipe compared to the filter.

22. The metering device according to claim 21, wherein The metering device further includes a purge mechanism, which includes an air blowing pipe, and the air blowing pipe is connected to the first connecting pipe.

23. The metering device according to claim 22, wherein The air blowing pipe is connected to one end of the first connecting pipe close to the safety valve; And / or, in the up-down direction, the position of the safety valve is higher than the communication position of the air blowing pipe and the dust extraction pipe, and the air blowing pipe is connected to the upper side of the dust extraction pipe.

24. The metering device according to claim 22, wherein The purge mechanism further includes a first switch valve, which is arranged on the air blowing pipe.

25. The metering device according to claim 24, characterized in that The metering device further includes a pressure detector and a controller. The pressure detector is provided on the tank body. The pressure detector and the first switch valve are electrically connected to the controller.

26. The metering device according to claim 15, wherein The metering device further includes a controller, and the airflow driving element is electrically connected to the controller.

27. The metering device according to any one of claims 1 to 14, characterized in that The metering device further includes a second communicating pipe and a second switch valve, wherein the second communicating pipe is connected to the tank body and the air inlet, and the second switch valve is provided on the second communicating pipe.

28. The metering device according to claim 27, wherein The metering device further includes a controller, and the second switch valve is electrically connected to the controller.

29. The metering device according to any one of claims 1 to 14, characterized in that The metering device further includes a pressure detector, a controller and an alarm. The pressure detector is arranged on the tank body. The pressure detector and the alarm are electrically connected to the controller.

30. A battery production system, characterized in that: Comprising a metering device as claimed in any one of claims 1 to 29.

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