Dust-free feeding method and associated device

Abstract

The application discloses a dust-free feeding method and a related device, and relates to the technical field of dust-free feeding, and provides a dust-free feeding method and a related device. The method comprises the following steps: in response to a bag placing completion instruction, controlling lateral columns to move outward and fix a material bag; starting an electromagnetic valve connected with an air bag, and acquiring the internal pressure of the air bag; when the internal pressure of the air bag is greater than or equal to a preset first air pressure threshold, closing the electromagnetic valve, and the first air pressure threshold is determined by the size parameters of the air bag and the material bag; controlling a feeding assembly to feed into the material bag, and maintaining the internal pressure of the air bag in a preset range through the electromagnetic valve, and the preset range is determined by the first air pressure threshold. The material bag is sealed by radial expansion after being inflated by the air bag before feeding, and the sealing state between a feeding opening and the material bag is maintained during the feeding process; a plurality of adjustable lateral columns clasp the material bag from multiple directions, provide lateral support, prevent the material bag from toppling, avoid the situation that dust is raised when material enters the material bag, and improve the cleanliness and control precision of material feeding.

Description

Technical Field

[0001] This application relates to the field of material conveying technology, and in particular to a dust-free feeding method and related apparatus. Background Technology

[0002] In industries such as chemical, pharmaceutical, food, and lithium battery materials, dust generation is a common problem during the feeding process of granular materials (such as lithium carbonate, lithium iron phosphate, and pharmaceutical intermediates). Existing feeding methods have the following drawbacks: First, the bag openings are not tightly sealed; most feeding devices rely on manual tying or simple clamps, resulting in poor sealing and significant dust leakage. Second, the bags are prone to tipping over; soft packaging bags deform and tip over during unloading due to gravity, causing material spillage. Third, the material accumulates unevenly; after feeding, the material forms a cone-shaped pile, requiring manual leveling, leading to secondary dust generation. Finally, residual air hinders conveying; the inability to expel air from the bag affects the efficiency of subsequent vacuum conveying. Therefore, it is necessary to ensure the airtightness between the bag and the feeding assembly to prevent dust generation during the feeding process. Summary of the Invention

[0003] This application provides a dust-free feeding method and related apparatus, which can prevent dust from being generated during the material entering the material bag, thereby improving the cleanliness and control accuracy of the material feeding.

[0004] In a first aspect, embodiments of this application provide a cleanroom feeding method applied to a cleanroom feeding system. The cleanroom feeding system includes a side rail, an airbag, and a feeding assembly. The side rail is used to fix the material bag, and the airbag is located between the side rail and the feeding assembly. The method includes the following steps: In response to the bag release completion command, the side rail is controlled to move outward and the bag is fixed in place; Activate the solenoid valve connected to the airbag and obtain the internal pressure of the airbag; When the internal pressure of the airbag is greater than or equal to a preset first air pressure threshold, the solenoid valve is closed. The first air pressure threshold is determined by the size parameters of the airbag and the material bag. The feeding assembly is controlled to feed material into the bag, and the internal pressure of the airbag is maintained within a preset range by the solenoid valve. The preset range is determined by the first air pressure threshold.

[0005] In some embodiments, the cleanroom feeding system further includes a pressure sensor and a drive device for driving the side rail, the pressure sensor being located between the side rail and the material bag; controlling the side rail to move outward and fix the material bag includes: The side rail is moved by the drive device and the pressure value is obtained by the pressure sensor. When the pressure value reaches a preset first pressure threshold, the drive device is controlled to stop operating. When the pressure value is less than the second pressure threshold, the drive device is controlled to move the side rail. The second pressure threshold is determined by the size parameters of the bag and the total weight of the material.

[0006] In some embodiments, the first air pressure threshold is determined by the size parameters of the airbag and the material bag, including: Based on the size parameters of the material bag, determine the contact area between the airbag and the material bag and the inner cavity area of ​​the airbag; The reference air pressure value is determined based on the contact area and the inner cavity area; The first pressure threshold is determined based on the reference air pressure value and the preset pressure loss value.

[0007] In some embodiments, after closing the solenoid valve when the internal pressure of the airbag is greater than or equal to a preset first air pressure threshold, the dust-free feeding method further includes: The radial deformation of the airbag is determined based on the internal pressure, the size parameters of the bag, and the material parameters of the bag. Based on the radial deformation and the size parameters of the bag, determine the interference fit of the bag; When the interference fit is less than 0, the solenoid valve is activated until the interference fit is greater than or equal to 0.

[0008] In some embodiments, according to the target parameters, the feeding assembly includes a feed inlet, a dust removal interface, and an exhaust device. The feed inlet is located above the side rail, and the exhaust device is connected to the dust removal interface. The dust removal interface is connected to the feed inlet through a feeding chamber. Controlling the feeding assembly to feed material into the bag includes: Open the feed inlet to allow the material from the feed assembly to enter the bag; The air extraction device is activated to bring the pressure in the feed chamber to a preset micro-pressure threshold.

[0009] In some embodiments, the cleanroom feeding system further includes a weighing component located below the material bag; after opening the feed inlet to allow material from the feed component to enter the material bag, the cleanroom feeding method further includes: According to the preset acquisition frequency, the weight information of the bag and the material is read through the weighing component; The weight information is filtered to determine the predicted weight; The net weight of the material is obtained based on the predicted weight and the weight of the bag. When the net weight of the material reaches a preset weight threshold, the feed inlet and the air extraction device are closed.

[0010] In some embodiments, the cleanroom feeding system further includes a vacuum pump connected to the feeding chamber; after closing the feed inlet and the vacuum device, the cleanroom feeding method further includes: Start the vacuum pump and obtain the internal pressure of the feed chamber; When the internal pressure of the feed chamber is less than the preset second air pressure threshold, the vacuum pump is controlled to run for a target duration and then shut down. The target duration is determined by the volume of the feed chamber, the second air pressure threshold, and the pumping speed of the vacuum pump.

[0011] Secondly, embodiments of this application provide a cleanroom feeding device for implementing the cleanroom feeding method of the first aspect, comprising: A fixing module is used to control the side rail to move outward and fix the material bag in response to the bag release completion command; The acquisition module is used to activate the solenoid valve connected to the airbag and acquire the internal pressure of the airbag; A sealing module is used to close the solenoid valve when the internal pressure of the airbag is greater than or equal to a preset first air pressure threshold, wherein the first air pressure threshold is determined by the size parameters of the airbag and the material bag. The maintenance module is used to control the feeding component to feed material into the bag and to maintain the internal pressure of the airbag within a preset range through the solenoid valve. The preset range is determined by the first air pressure threshold.

[0012] Thirdly, embodiments of this application provide an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, it implements the dust-free feeding method of the first aspect.

[0013] Fourthly, embodiments of this application provide a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the dust-free feeding method of the first aspect.

[0014] The dust-free feeding method and related apparatus of this application have at least the following beneficial effects: In response to a bag-release completion command, the side rails are controlled to move outward and fix the bag; a solenoid valve connected to the airbag is activated, and the internal pressure of the airbag is acquired; when the internal pressure of the airbag is greater than or equal to a preset first air pressure threshold, the solenoid valve is closed, the first air pressure threshold being determined by the size parameters of the airbag and the bag; the feeding assembly is controlled to feed material into the bag, and the internal pressure of the airbag is maintained within a preset range by the solenoid valve, the preset range being determined by the first air pressure threshold. Before feeding, the bag is radially expanded and sealed by inflating the airbag, and a sealed state is maintained between the inlet and the bag during feeding; multiple adjustable side rails clamp the bag from multiple directions, providing lateral support, preventing the bag from tipping over, avoiding dust generation during material entry into the bag, and improving the cleanliness and control accuracy of material feeding.

[0015] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the description and the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is a flowchart of a dust-free feeding method according to an embodiment of the present invention; Figure 2 for Figure 1 Flowchart of step S1000; Figure 3 for Figure 1 Flowchart of step S3000; Figure 4 for Figure 1 A flowchart of step S3000 in another embodiment; Figure 5 for Figure 1 Flowchart of step S4000; Figure 6 for Figure 1 A flowchart of step S4000 in another embodiment; Figure 7 This is a flowchart of a dust-free feeding method according to another embodiment of the present invention; Figure 8 This is a structural diagram of a dust-free feeding device according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various implementations. Simultaneously, the steps or actions described in the method description can be rearranged or adjusted in a manner readily apparent to those skilled in the art. Therefore, the various orders in the specification and drawings are merely for the clear description of a particular embodiment and do not imply a mandatory order, unless otherwise stated that a particular order must be followed.

[0018] In the description of this application, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0019] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0020] The dust-free feeding method and related apparatus involved in the embodiments of the present invention include a dust-free feeding device that is an integrated equipment for feeding and conveying powder and granular materials in a closed manner without dust emission. It relies on a closed cavity combined with negative pressure dust removal to lock in dust at the source, solving the problems of dust emission, material loss, occupational diseases of personnel, and cross-contamination caused by traditional open feeding. It is a standard equipment for clean production lines in pharmaceuticals, food, lithium batteries, and fine chemicals.

[0021] Specifically, dust generation is a common problem in the feeding process of granular materials (such as lithium carbonate, lithium iron phosphate, and pharmaceutical intermediates) in industries such as chemicals, pharmaceuticals, food, and lithium battery materials. Existing feeding methods have the following drawbacks: First, the bag openings are not tightly sealed; most feeding devices rely on manual tying or simple clamps, resulting in poor sealing and significant dust leakage. Second, the bags are prone to tipping over; soft packaging bags deform and tip over during unloading due to gravity, causing material spillage. Third, the material accumulates unevenly; after feeding, the material forms a cone-shaped pile, requiring manual leveling, leading to secondary dust generation. Finally, residual air hinders conveying; the inability to expel air from the bags affects the efficiency of subsequent vacuum conveying. Therefore, it is necessary to ensure the airtightness between the bag and the feeding assembly to prevent dust generation during the feeding process.

[0022] Based on the above, embodiments of the present invention provide a dust-free feeding method and related apparatus. In response to a bag-release completion command, the method controls the side rails to move outward and fix the bag; it activates a solenoid valve connected to an airbag and acquires the internal pressure of the airbag; when the internal pressure of the airbag is greater than or equal to a preset first pressure threshold, the solenoid valve is closed. The first pressure threshold is determined by the size parameters of the airbag and the bag; the method controls the feeding assembly to feed material into the bag, and maintains the internal pressure of the airbag within a preset range through the solenoid valve. The preset range is determined by the first pressure threshold. Before feeding, the bag is radially expanded and sealed by inflating the airbag, and a seal is maintained between the inlet and the bag during feeding. Multiple adjustable side rails clamp the bag from multiple directions, providing lateral support, preventing the bag from tipping over, avoiding dust generation during material entry into the bag, and improving the cleanliness and control accuracy of material feeding.

[0023] Please see Figure 1 , Figure 1 A flowchart of a cleanroom feeding method according to an embodiment of the present invention is shown. This cleanroom feeding method is applied to a cleanroom feeding system, which includes a side rail, an airbag, and a feeding assembly. The side rail is used to fix the material bag, and the airbag is located between the side rail and the feeding assembly. Figure 1 As shown, the dust-free feeding method of this invention includes the following steps: Step S1000: In response to the bag release completion command, control the side rail to move outward and fix the bag.

[0024] Understandably, when the cleanroom feeding system is in its initial state, the PLC powers on and performs a self-test, all sensors are zeroed, the weighing components tare, and the zero-point value is read. The airbag's pressure sensor detects the initial air pressure. The side panel position sensors detect that each side panel is in its maximum opening position.

[0025] It should be noted that the operator first places the bag into the space enclosed by the four side rails, with the bag opening extending from the top and fitting into the annular airbag; then, a foot switch is triggered to confirm the bag placement is complete, and a bag placement completion command is issued. In other embodiments, the bag placement can also be completed by an automated device, with a photoelectric sensor confirming the completion and issuing a bag placement completion command. In this case, since the bag is placed within the space enclosed by the four side rails, controlling the outward movement of the side rails can clamp and secure the bag, ensuring that the bag opening fits into the annular airbag and faces the feed inlet.

[0026] Please see Figure 2 , Figure 2 A schematic diagram illustrating the specific implementation process of step S1000 above is shown. The cleanroom feeding system also includes a pressure sensor and a drive device for driving the side rails; the pressure sensor is located between the side rails and the material bag. Figure 2As shown, step S1000 includes at least the following steps: Step S1100: Move the side rail by driving the drive device and obtain the pressure value by the pressure sensor.

[0027] Understandably, multiple side rails are positioned around the opening of the bag. A drive mechanism moves the side rails to engage with the bag opening, ensuring a stable opening. This drive mechanism can be a motor or a pneumatic cylinder. Furthermore, each side rail is equipped with a corresponding pressure sensor to accurately monitor the pressure between the side rail and the bag, determining whether the side rail is securely holding the bag in place. Specifically, the use of a drive mechanism to move the side rails and the pressure sensors to obtain pressure values ​​is existing technology and will not be elaborated upon here.

[0028] It should be noted that the drive unit first synchronously drives the front and rear side rails (Y direction) to move inward to the preset first position. Then, simultaneously drive the left and right side panels (X direction) to move inward to the preset first position. This allows multiple side rails to precisely engage with the bag opening, completing the initial fixation of the bag.

[0029] Step S1200: When the pressure value reaches the preset first pressure threshold, control the drive device to stop operating.

[0030] It is understandable that the pressure value fed back by the pressure sensor on the side rails will be detected when the contact pressure of either side rail reaches the first pressure threshold. At that time, the drive unit corresponding to the side rail stops operating.

[0031] It should be noted that once all side rails have stopped, the system enters fine-tuning mode, meaning the drive unit moves each side rail at a low speed. Adjust the position so that the clamping force of all four side rails on the bag is sufficient. ,in, This is the preset error pressure value. By fine-tuning the position of the side rails, the accuracy of the side rails holding the bag can be further improved, ensuring the stability of the bag.

[0032] Step S1300: When the pressure value is less than the second pressure threshold, control the drive device to move the side rail. The second pressure threshold is determined by the size parameters of the bag and the total weight of the material.

[0033] Understandably, as the total weight of the material increases, the side rails need to continuously adjust the pressure applied to the bag to prevent it from tipping over. At this point, it's necessary to continuously monitor the pressure value. When the pressure value falls below a second pressure threshold, the drive unit is controlled to move the side rails. Specifically, the second pressure threshold... The calculation formula is as follows:

[0034] in, For the effective support height of the side rail, The coefficient of static friction between the bag and the side rail. This is the total weight of the materials. The height of the material bag's center of gravity. The second pressure threshold is determined by the material bag's dimensions and the total weight of the material. It effectively prevents the material bag from tipping over due to its own weight during the feeding process, thus improving feeding stability.

[0035] Step S2000: Activate the solenoid valve connected to the airbag and obtain the internal pressure of the airbag.

[0036] It is understood that the airbag used in this embodiment has only one air inlet, meaning that the inlet and outlet share the same pipeline. A solenoid valve switches between three states: inflation, pressure holding, and deflation. When the solenoid valve opens the air supply, the airbag inflates and increases pressure. When the solenoid valve cuts off the air supply and blocks the air inlet, it enters the pressure holding state, maintaining the airbag's height and pressure. When the solenoid valve opens to the atmosphere, the airbag deflates and releases pressure. When the solenoid valve connected to the airbag is activated, it opens the air supply and enters the inflation state. At this time, the airbag inflates and fits against the bag opening. Simultaneously, the internal pressure of the airbag continuously increases, requiring real-time monitoring of the internal pressure. It should be noted that activating the solenoid valve to inflate the airbag and obtaining its internal pressure is prior art and will not be elaborated upon here.

[0037] Step S3000: When the internal pressure of the airbag is greater than or equal to the preset first air pressure threshold, the solenoid valve is closed. The first air pressure threshold is determined by the size parameters of the airbag and the material bag.

[0038] Understandably, once the internal pressure of the airbag reaches the preset first pressure threshold, to prevent excessive internal pressure from damaging the side rails and material bags and affecting the stability of the cleanroom feeding system, the solenoid valve needs to be closed to enter a pressure-holding state. At this point, it is necessary to confirm that the internal pressure of the airbag has reached the first pressure threshold, i.e. The airbag can seal the bag opening, ensuring that the material cannot be transferred to the outside through the gap between the airbag and the material bag during the feeding process. The size of the first air pressure threshold needs to be determined by the size parameters of the airbag and the material bag.

[0039] Please see Figure 3 , Figure 3 A schematic diagram illustrating the specific implementation process of step S3000 above is shown. For example... Figure 3 As shown, step S3000 further includes at least the following steps: Step S3100: Determine the contact area between the airbag and the airbag and the inner cavity area of ​​the airbag according to the size parameters of the material bag.

[0040] Understandably, the contact area between the airbag and the material bag is determined based on the bag's size parameters. and the inner cavity area of ​​the airbag Among them, the internal cavity area of ​​the airbag The shape and size of the bag determine the contact area. The calculation formula is as follows:

[0041] in, The depth of the bag opening; This refers to the width of the bag opening.

[0042] Step S3200: Determine the reference air pressure value based on the contact area and the inner cavity area.

[0043] Understandably, after obtaining the contact area and inner cavity area, a reference air pressure value is determined by using a preset minimum contact stress. Specifically, the formula for calculating the reference air pressure value is as follows:

[0044] in, In practical applications, the minimum contact stress required for a seal is... .

[0045] Step S3300: Determine the first air pressure threshold based on the reference air pressure value and the preset pressure loss value.

[0046] Understandably, because the elastic deformation of the airbag causes pressure loss, after obtaining the reference air pressure value, it is necessary to determine the first air pressure threshold by combining it with a preset pressure loss value. Specifically, the first air pressure threshold... The calculation formula is as follows:

[0047] in, This represents the pressure loss value.

[0048] Please see Figure 4 , Figure 4 A schematic diagram illustrating the specific implementation process of another embodiment of step S3000 described above is shown. For example... Figure 4 As shown, step S3000 includes at least the following steps: Step S3400: Determine the radial deformation of the airbag based on the internal pressure, the size parameters of the bag, and the material parameters of the bag.

[0049] Understandably, to ensure a tight seal between the airbag and the material bag, it is necessary to calculate the interference fit of the material bag in real time to determine whether the airbag and the material bag maintain a sealed state. Specifically, the radial deformation of the airbag... The calculation formula is as follows:

[0050] in, This is the initial inner diameter of the airbag. The elastic modulus of the airbag material. For the wall thickness of the airbag, It is Poisson's ratio.

[0051] Step S3500: Determine the interference fit of the material bag based on the radial deformation and the size parameters of the material bag.

[0052] As can be understood from the above, determining the radial deformation of the airbag is crucial. Then, by combining the size parameters of the material bag, the interference fit of the material bag can be determined. When the interference fit of the material bag is greater than 0, the airbag seals the bag opening, ensuring that material cannot be transferred outside the bag through the gap between the airbag and the bag opening during the feeding process. Specifically, the interference fit of the material bag... The calculation process is shown in the following formula:

[0053] in, The radius of the bag opening is denoted as .

[0054] Step S3600: When the interference fit is less than 0, start the solenoid valve until the interference fit is greater than or equal to 0.

[0055] It is understandable that after obtaining the interference fit in the above steps, the interference fit of the material bag is compared with that of the material bag. The value between 0 and 0 indicates whether the airbag seals the bag opening. Specifically, when the interference fit is less than 0, the solenoid valve is activated, causing it to enter the inflation state, inflating the airbag and increasing the internal pressure. To achieve the desired interference fit Increase until The airbag seals the opening of the material bag, ensuring that the material cannot be transferred to the outside of the bag through the gap between the airbag and the opening of the bag during the feeding process. It controls the solenoid valve to enter the pressure holding state so that the airbag can stably seal the opening of the material bag.

[0056] Step S4000: Control the feeding component to feed material into the bag, and maintain the internal pressure of the airbag within a preset range through the solenoid valve. The preset range is determined by the first air pressure threshold.

[0057] Understandably, once the airbag can stably seal the bag opening, the feeding component can be controlled to feed material into the bag, effectively ensuring the stability of the feeding process and improving the operational stability of the cleanroom feeding system.

[0058] Please see Figure 5 , Figure 5 A schematic diagram illustrating the specific implementation process of step S4000 above is shown. The feeding assembly includes a feed inlet, a dust removal interface, and an air extraction device. The feed inlet is located above the side panel, and the air extraction device is connected to the dust removal interface; the dust removal interface is connected to the feed inlet through the feeding chamber. Figure 5 As shown, step S4000 includes at least the following steps: Step S4100: Open the feed port to allow the material from the feeding component to enter the material bag.

[0059] Understandably, after the airbag reliably seals the bag opening, by opening the inlet, the material inside the feeding assembly can enter the bag under gravity through the inlet and the middle of the airbag. In practical applications, the operator opens the bottom knot or cuts the bottom of the bag, and the material falls into the inlet below under gravity. Of course, in other embodiments, the feeding assembly can also use an automated feeding device to quantitatively extract material to the inlet to ensure the operational stability of the feeding assembly.

[0060] Step S4200: Start the air extraction device to bring the pressure in the feed chamber to a preset micro-pressure threshold.

[0061] Understandably, the extraction device is connected to the feeding chamber and inlet via a dust removal interface. By using negative pressure suction, a slight negative pressure is maintained within the feeding chamber to ensure that dust generated during the material's descent into the material bag is collected again through the dust removal interface, preventing dust from entering the air and affecting the operating environment of the cleanroom feeding system. Specifically, the preset micro-pressure threshold is -50 to -100 Pa, effectively preventing dust from being transmitted into the air and ensuring that all powdery materials enter the material bag, thus guaranteeing the stable operation of the cleanroom feeding system.

[0062] Please see Figure 6 , Figure 6 A schematic diagram illustrating another embodiment of step S4000 described above is shown. The cleanroom feeding system also includes a weighing component located below the material bag. Figure 6 As shown, step S4000 includes at least the following steps: Step S4300: Read the weight information of the bag and material through the weighing component according to the preset acquisition frequency.

[0063] Understandably, to accurately control the weight of the material entering the bag, multiple weighing sensors in the weighing assembly need to collect and summarize the total weight information of the bag and the material. Specifically, the sampling frequency is 100Hz, and the weight information... The calculation formula is as follows:

[0064] in, Let be the weight value collected by the i-th weighing sensor. At this time, there are 4 weighing sensors in the weighing assembly.

[0065] Step S4400: Filter the weight information to determine the predicted weight.

[0066] Understandably, after obtaining the weight information, it needs to be filtered. Specifically, the moving average filtering process is as follows:

[0067] in, , Next, Kalman filtering is used to estimate the state of the weight information:

[0068]

[0069] Next, the Kalman gain is calculated as shown in the following equation:

[0070] Among them, process noise =0.01, measurement noise =0.1.

[0071] Finally, the predicted weight is obtained as shown in the following formula:

[0072] The covariance update is shown in the following formula:

[0073] Step S4500: Obtain the net weight of the material based on the predicted weight and the weight of the bag.

[0074] Understandably, when obtaining the predicted weight... Then, the weight of the bag needs to be subtracted. The net weight of the material is obtained. The specific formula is as follows:

[0075] Step S4600: When the net weight of the material reaches the preset weight threshold, close the feed inlet and the air extraction device.

[0076] Understandably, when the net weight of the material reaches the preset weight threshold, the feeding operation is complete. In order to avoid the material remaining in the feed inlet affecting the accuracy of feeding, the feed inlet and the air extraction device need to be closed.

[0077] In some embodiments, to increase the feeding rate, the net weight of the material is typically allowed to exceed a preset weight threshold. There is a certain error value between them, as shown in the following formula:

[0078] in, The allowable deviation value is typically taken as ±0.5% of the weight threshold.

[0079] Please see Figure 7 , Figure 7 A flowchart illustrating a cleanroom feeding method according to another embodiment of the present invention is shown. The cleanroom feeding system also includes a vacuum pump connected to the feeding chamber. Figure 7 As shown, the dust-free feeding method provided by this embodiment of the invention includes at least the following steps: Step S4700: Start the vacuum pump and obtain the internal pressure of the feed chamber.

[0080] Understandably, after the feeding operation is completed through the above steps, dust still exists inside the feeding chamber. To prevent dust from entering the air and causing pollution, it is necessary to seal the feeding chamber and vent it. Simultaneously, the internal pressure of the feeding chamber is obtained through a pressure sensor. .

[0081] Step S4800: When the internal pressure of the feeding chamber is less than the preset second air pressure threshold, the vacuum pump is controlled to run for a target time and then shut off. The target time is determined by the volume of the feeding chamber, the second air pressure threshold and the pumping speed of the vacuum pump.

[0082] It is understandable that when the internal pressure of the feeding chamber is less than the preset second air pressure threshold... ,Right now At this point, the internal pressure of the feeding chamber reaches the target vacuum level, such as -80 kPa gauge pressure. To ensure the energy consumption and control accuracy of the dust-free feeding system, the vacuum pump is controlled to run for the target duration. Close later. Target duration The calculation formula is as follows:

[0083] in, The effective volume of the feed chamber. This refers to the pumping speed of the vacuum pump. The pressure is atmospheric pressure (101325 Pa).

[0084] like Figure 8 As shown, Figure 8This is a schematic diagram of the structure of the cleanroom feeding device 500 provided in the embodiments of this application. The cleanroom feeding method provided in the embodiments of this application involves the following modules in the cleanroom feeding device 500: fixing module 510, acquisition module 520, sealing module 530 and maintenance module 540.

[0085] Among them, the fixing module 510 is used to control the side rail to move outward and fix the material bag in response to the bag release completion command; The acquisition module 520 is used to activate the solenoid valve connected to the airbag and acquire the internal pressure of the airbag; The sealing module 530 is used to close the solenoid valve when the internal pressure of the airbag is greater than or equal to a preset first air pressure threshold. The first air pressure threshold is determined by the size parameters of the airbag and the material bag. The maintaining module 540 is used to control the feeding component to feed material into the bag and to maintain the internal pressure of the air bag within a preset range through a solenoid valve. The preset range is determined by a first air pressure threshold.

[0086] It should be noted that the information interaction and execution process between the modules of the above-mentioned device are based on the same concept as the method embodiment of this application. For details on their specific functions and technical effects, please refer to the method embodiment section, and they will not be repeated here.

[0087] like Figure 9 As shown, Figure 9 This is a schematic diagram of an electronic device 600 provided in one embodiment of this application.

[0088] The electronic device 600 of this application embodiment includes one or more processors 610 and a memory 620. Figure 9 The example uses a processor 610 and a memory 620.

[0089] The processor 610 and the memory 620 can be connected via a bus or other means. Figure 9 Taking the example of a connection between China and Israel via a bus.

[0090] Memory 620, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory 620 may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory 620 may optionally include memory 620 remotely located relative to processor 610, and these remote memories can be connected to the electronic device 600 via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0091] Those skilled in the art will understand that Figure 9 The device structure shown does not constitute a limitation on the electronic device 600, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0092] This application embodiment also provides a storage medium storing computer-executable instructions for executing the above-described cleanroom feeding method.

[0093] In one embodiment, the storage medium stores computer-executable instructions that are executed by one or more processors 610, such as one of the processors 610 in the aforementioned electronic device 600, which can cause the one or more processors 610 to perform the cleanroom feeding method provided in any embodiment of this application.

[0094] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network nodes. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0095] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0096] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0097] In the several embodiments provided in this application, it should be understood that the disclosed systems, instruments, and methods can be implemented in other ways. For example, the instrument embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between instruments or units may be electrical, mechanical, or other forms. Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, i.e., they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0098] It should also be understood that the various implementation methods provided in this application can be combined arbitrarily to achieve different technical effects.

[0099] The above is a detailed description of the preferred embodiments of this application. However, this application is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this application. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A cleanroom feeding method, applied to a cleanroom feeding system, the cleanroom feeding system comprising a side rail, an airbag, and a feeding assembly, the side rail for fixing a material bag, the airbag being located between the side rail and the feeding assembly, characterized in that, The method Includes the following steps: In response to the bag release completion command, the side rail is controlled to move outward and the bag is fixed in place; Activate the solenoid valve connected to the airbag and obtain the internal pressure of the airbag; When the internal pressure of the airbag is greater than or equal to a preset first pressure threshold, the solenoid valve is closed. The first pressure threshold is determined by the size parameters of the airbag and the material bag. Specifically, based on the size parameters of the material bag, the contact area between the airbag and the material bag and the inner cavity area of ​​the airbag are determined; based on the contact area and the inner cavity area, a reference pressure value is determined; based on the reference pressure value and a preset pressure loss value, the first pressure threshold is determined; based on the internal pressure, the size parameters of the material bag, and the material parameters of the material bag, the radial deformation of the airbag is determined; based on the radial deformation and the material bag… The size parameters determine the interference fit of the material bag; when the interference fit is less than 0, the solenoid valve is activated until the interference fit is greater than or equal to 0; by comparing the interference fit with 0, it can be determined whether the airbag seals the material bag. When the interference fit is less than 0, the solenoid valve is activated, causing the solenoid valve to enter the inflation state, the airbag inflates and increases the internal pressure of the airbag, so that the interference fit increases until it is greater than or equal to 0. The airbag seals the opening of the material bag, ensuring that the material cannot be transferred to the outside of the material bag through the gap between the airbag and the opening of the material bag during the feeding process; The feeding assembly is controlled to feed material into the bag, and the internal pressure of the airbag is maintained within a preset range by the solenoid valve. The preset range is determined by the first air pressure threshold.

2. The dust-free feeding method according to claim 1, characterized in that, The cleanroom feeding system further includes a pressure sensor and a drive device for driving the side rail, the pressure sensor being located between the side rail and the material bag; controlling the side rail to move outward and fix the material bag includes: The side rail is moved by the drive device and the pressure value is obtained by the pressure sensor. When the pressure value reaches a preset first pressure threshold, the drive device is controlled to stop operating. When the pressure value is less than the second pressure threshold, the drive device is controlled to move the side rail. The second pressure threshold is determined by the size parameters of the bag and the total weight of the material.

3. The dust-free feeding method according to claim 1, characterized in that, The feeding assembly includes a feed inlet, a dust removal interface, and an exhaust device. The feed inlet is located above the side rail, and the exhaust device is connected to the dust removal interface. The dust removal interface is connected to the feed inlet through a feeding chamber. Controlling the feeding assembly to feed material into the bag includes: Open the feed inlet to allow the material from the feed assembly to enter the bag; The air extraction device is activated to bring the pressure in the feed chamber to a preset micro-pressure threshold.

4. The dust-free feeding method according to claim 3, characterized in that, The cleanroom feeding system further includes a weighing component located below the material bag; after opening the feed inlet to allow material from the feed component to enter the material bag, the cleanroom feeding method further includes: According to the preset acquisition frequency, the weight information of the bag and the material is read through the weighing component; The weight information is filtered to determine the predicted weight; The net weight of the material is obtained based on the predicted weight and the weight of the bag. When the net weight of the material reaches a preset weight threshold, the feed inlet and the air extraction device are closed.

5. The dust-free feeding method according to claim 4, characterized in that, The dust-free feeding system further includes a vacuum pump connected to the feeding chamber; after closing the feed inlet and the vacuum device, the dust-free feeding method further includes: Start the vacuum pump and obtain the internal pressure of the feed chamber; When the internal pressure of the feed chamber is less than the preset second air pressure threshold, the vacuum pump is controlled to run for a target duration and then shut down. The target duration is determined by the volume of the feed chamber, the second air pressure threshold, and the pumping speed of the vacuum pump.

6. A dust-free feeding device for implementing the dust-free feeding method according to any one of claims 1 to 5, characterized in that, include: A fixing module is used to control the side rail to move outward and fix the material bag in response to the bag release completion command; The acquisition module is used to activate the solenoid valve connected to the airbag and acquire the internal pressure of the airbag; A sealing module is used to close the solenoid valve when the internal pressure of the airbag is greater than or equal to a preset first air pressure threshold. The first air pressure threshold is determined by the size parameters of the airbag and the material bag. Specifically, based on the size parameters of the material bag, the contact area between the airbag and the material bag and the inner cavity area of ​​the airbag are determined; a reference air pressure value is determined based on the contact area and the inner cavity area; the first air pressure threshold is determined based on the reference air pressure value and a preset pressure loss value; the radial deformation of the airbag is determined based on the internal pressure, the size parameters of the material bag, and the material parameters of the material bag; and the radial deformation is determined based on the... The size parameters of the material bag are described to determine the interference fit of the material bag. When the interference fit is less than 0, the solenoid valve is activated until the interference fit is greater than or equal to 0. By comparing the interference fit with 0, it can be determined whether the airbag seals the material bag. When the interference fit is less than 0, the solenoid valve is activated, causing the solenoid valve to enter the inflation state. The airbag inflates and increases the internal pressure of the airbag, thereby increasing the interference fit until it is greater than or equal to 0. The airbag seals the opening of the material bag, ensuring that the material cannot be transferred to the outside of the material bag through the gap between the airbag and the opening of the material bag during the feeding process. The maintenance module is used to control the feeding component to feed material into the bag and to maintain the internal pressure of the airbag within a preset range through the solenoid valve. The preset range is determined by the first air pressure threshold.

7. An electronic device, characterized in that, include: The processor includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the dust-free feeding method as described in any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, The device contains a computer program that, when executed by a processor, implements the dust-free feeding method as described in any one of claims 1 to 5.

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