A kind of ultra-light powder metering type dust-free unpacking machine

Abstract

The present application relates to the technical field of unpacking machine, specifically is a kind of for ultra-light powder metering type dust-free unpacking machine, including, mobile type charging trolley below is equipped with metering and weighing base, mobile type charging trolley top is equipped with visual glove box sealing cover, mobile type charging trolley inside is connected with pneumatic lifting suction pipe assembly, the present application adopts integrated full-closed operation cavity to be matched with self-adapting flexible sealing structure, can realize the whole process of unpacking, feeding, conveying no dust leakage, effectively solve the industry problem of ultra-light super-fine powder easy to float, easy to leak, pollute working condition environment.Simultaneously can balance the internal gas pressure of cavity in real time, avoid the dust and equipment failure caused by pressure, negative pressure anomaly, prevent powder impurities from mixing, effectively guarantee the purity of powder product, integrated automatic sealing, self-adapting suction, pipeline automatic blowing, solid-gas ratio adjustable and other multifunctional structure, can be adjusted according to different bulkiness, different density of ultra-light powder conveying state.

Description

Technical Field

[0001] This invention relates to the field of unpacking machine technology, specifically a dust-free unpacking machine for metering ultralight powder materials. Background Technology

[0002] Ultralight and ultrafine powders are widely used in the production processes of fine chemicals, lithium battery new materials, and powder manufacturing. These powders are characterized by their loose texture, light weight, easy floating, easy dust generation, and easy adhesion and agglomeration. They require extremely high airtightness and accuracy in unpacking, feeding, and metering operations.

[0003] Most existing equipment has an open or semi-closed structure, which can easily generate a large amount of dust leakage during manual unpacking operations. This not only pollutes the production environment and endangers the health of operators, but also causes ultrafine powder to be scattered and lost, increasing material production costs. At the same time, open operations can easily lead to external impurities mixing into the powder, reducing the purity of the powder product and failing to meet the high cleanliness production standards of cleanrooms and high-end new materials. Furthermore, the equipment cavity lacks an air pressure balance structure, which can easily cause cavity pressure buildup and air pressure imbalance during negative pressure suction operations, further aggravating dust leakage and operational malfunctions. Summary of the Invention

[0004] The purpose of this invention is to provide a dust-free unpacking machine for metering ultralight powder materials, so as to solve the problems mentioned in the background art.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A dust-free unpacking machine for metering ultralight powder includes a mobile loading trolley, a metering and weighing base below the mobile loading trolley, a visual glove box sealing cover mounted on top of the mobile loading trolley, a pneumatic lifting suction pipe assembly connected inside the mobile loading trolley, and an airbag sealing assembly inside the visual glove box sealing cover.

[0007] Preferably, a transparent glass cover is provided on one side of the upper part of the visual glove box sealing cover, and two glove operation ports are symmetrically arranged and connected to the outer edge of the visual glove box sealing cover on the side of the transparent glass cover. A pressure compensation valve is installed on the side of the transparent glass cover and the pressure compensation valve is connected to the inner cavity of the visual glove box sealing cover.

[0008] Preferably, the airbag sealing assembly includes an airbag and a ring tube. The airbags are respectively arranged inside the two glove operating ports. The ring tube is fixed to the inner wall of the inner cavity of the visual glove box sealing cover. An air injection valve and an air release valve are respectively installed on the side walls of the two glove operating ports that are far apart from each other. The air injection valve and the air release valve are both fixed to the inner wall of the visual glove box sealing cover. The ring tube is connected to the two airbags respectively through an air supply pipe.

[0009] Preferably, a motor is provided inside the sealing cover of the visual glove box. The motor drives the shaft to rotate. A cam is fixed at the end of the shaft. An internal rod is fixed to the outside of the cam. The internal rod is slidably assembled inside the arc-shaped groove. The air injection valve is electrically connected to the motor that drives the shaft to rotate.

[0010] Preferably, the mobile loading trolley includes a mobile trolley body, which is connected to the bottom of the sealing cover of the visual glove box. The two are interconnected. The material cutting-off pneumatic ball valve, the pipeline purging pneumatic butterfly valve, and the solid-gas ratio regulating valve belong to the pneumatic lifting suction pipe assembly. The material cutting-off pneumatic ball valve is bypassed and connected to the pipeline purging pneumatic butterfly valve. The pipeline purging pneumatic butterfly valve is connected to the solid-gas ratio regulating valve.

[0011] Preferably, the pneumatic lifting suction pipe assembly includes a pneumatic lifting suction pipe, which is equipped with a lifting drive cylinder, and symmetrically arranged guide shafts are fixedly installed on the left and right sides of the pneumatic lifting suction pipe assembly.

[0012] Preferably, the weighing base includes a weighing base plate, a high-precision weighing sensor is installed on one side of the weighing base plate, a pneumatic locking device is installed on the other side, and a ground base is set on the outside of the weighing base plate, with the base contacting the ground to achieve the bearing of the whole machine.

[0013] Preferably, the pneumatic locking device is used to position and lock the mobile loading trolley. This unpacking machine is compatible with an external vacuum feeder and uses the loss-in-weight method to complete the powder metering.

[0014] Preferably, an air injection cylinder is provided below the ring pipe, the air injection cylinder is connected to the inside of the sealing cover of the visual glove box, a piston rod is slidably assembled in the middle of the air injection cylinder, the top of the air injection cylinder is connected to the ring pipe through a connecting pipe, a one-way valve is installed in the connecting pipe, and an arc groove is opened in the middle of the piston rod.

[0015] Preferably, a dust-free unpacking machine for metering ultralight powder includes the following steps during use:

[0016] S1: Initial Preparation Phase

[0017] The pneumatic lifting suction pipe assembly is raised to the highest stroke position, the visual glove box sealing cover is opened, the material cutting pneumatic ball valve remains closed, the pipeline purging pneumatic butterfly valve remains open, the high-precision weighing sensor performs automatic zeroing, the mobile loading trolley is pushed to the metering and weighing base station and locked in position using a pneumatic locker, the visual glove box sealing cover is closed, and the operator's hand passes through the glove operating port into the sealed cavity to complete the powder unpacking operation;

[0018] S2: Start the external vacuum feeder, open the material cut-off pneumatic ball valve, close the pipeline purging pneumatic butterfly valve, control the pneumatic lifting suction pipe assembly to descend as a whole, and transport the powder material by relying on negative pressure. The moving trolley box is equipped with a shock-absorbing buffer plate mechanism to ensure stable weighing. When the weighing value reaches the set discharge weight, stop the descent of the pneumatic lifting suction pipe, close the material cut-off pneumatic ball valve, reopen the pipeline purging pneumatic butterfly valve, control the pneumatic lifting suction pipe to rise, and introduce airflow to purge the residual powder material in the pipeline. After the purging delay ends, turn off the vacuum feeder.

[0019] The beneficial effects of this invention are:

[0020] 1. This invention adopts an integrated fully enclosed working chamber with an adaptive flexible sealing structure, which can achieve dust-free leakage during the entire process of unpacking, loading, and conveying. It effectively solves the industry problem that ultra-light and ultra-fine powders are prone to floating, leakage, and pollution of the working environment. At the same time, it can balance the internal air pressure of the chamber in real time, avoid dust and equipment failure caused by abnormal pressure or negative pressure, prevent the mixing of powder impurities, effectively ensure the purity of powder products, and is fully compatible with high-cleanliness production scenarios such as cleanrooms, fine chemicals, and lithium battery new materials. It also improves the working environment and protects the health of operators.

[0021] 2. This invention integrates multiple functions such as automatic sealing, adaptive material suction, automatic pipeline purging, and adjustable solid-gas ratio. It can adaptively adjust the conveying state according to the different bulkiness and density of ultralight powders, adapting to various types, batches, and small-volume powder production conditions. Simultaneously, it automatically cleans residual powder in the pipeline after operation, preventing powder adhesion and clumping, pipeline blockage, and batch mixing problems. No manual pipeline cleaning is required. Combined with a mobile vehicle structure, it can quickly complete workstation switching, material replacement and cleaning, and equipment maintenance. It boasts high operational efficiency, low manual labor intensity, and meets the needs of continuous and stable industrial production. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall front structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the overall rear structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the visual glove box sealing cover structure of the present invention;

[0026] Figure 4This is a schematic diagram of the mobile loading trolley structure of the present invention;

[0027] Figure 5 This is a partial rear view of the pneumatic telescopic suction tube assembly of the present invention;

[0028] Figure 6 This is a partial side view of the pneumatic telescopic suction tube assembly of the present invention;

[0029] Figure 7 This is a top view schematic diagram of the weighing base of the present invention;

[0030] Figure 8 This is a schematic diagram of the airbag sealing component structure of the present invention;

[0031] Figure 9 This is a top view schematic diagram of the airbag sealing component of the present invention;

[0032] Figure 10 This is a partial structural diagram of the airbag sealing component of the present invention.

[0033] The attached figures are labeled as follows:

[0034] 1. Visual glove box sealing cover; 10. Airbag; 101. Inflation valve; 102. Relief valve; 103. Ring pipe; 104. Inflation cylinder; 105. Connecting pipe; 106. Piston rod; 107. Arc groove; 108. Shaft; 109. Cam; 1090. Internal rod; 1-1. Transparent glass cover; 1-2. Glove operating port; 1-3. Air pressure compensation valve; 2. Mobile loading trolley; 2-1. Mobile trolley body; 2 -2. Sealed hatch; 2-3. Pneumatic massage plate mechanism; 3. Pneumatic lifting suction pipe assembly; 3-1. Pneumatic lifting suction pipe; 3-2. Lifting drive cylinder; 3-3. Guide shaft; 3-4. Material cutting-off pneumatic ball valve; 3-5. Pipeline purging pneumatic butterfly valve; 3-6. Solid-gas ratio regulating valve; 4. Metering and weighing base; 4-1. Weighing base plate; 4-2. High-precision weighing sensor; 4-3. Pneumatic lock; 4-4. Base. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Please see Figure 1-10As shown, the present invention is a dust-free unpacking machine for metering ultralight powder, including a mobile loading trolley 2, a metering and weighing base 4 below the mobile loading trolley 2, a visual glove box sealing cover 1 mounted on top of the mobile loading trolley 2, a pneumatic lifting suction pipe assembly 3 connected inside the mobile loading trolley 2, and an airbag sealing assembly inside the visual glove box sealing cover 1.

[0037] A transparent glass cover 1-1 is provided on one side of the upper part of the visual glove box sealing cover 1. Two glove operation ports 1-2 are symmetrically arranged on the side of the transparent glass cover 1-1 and connected to the outer edge of the visual glove box sealing cover 1. A pressure compensation valve 1-3 is installed on the side of the transparent glass cover 1-1 and the pressure compensation valve 1-3 is connected to the inner cavity of the visual glove box sealing cover 1.

[0038] By using a fully sealed cavity and airbag sealing components, the entire unpacking and loading process is completely sealed, completely eliminating the leakage of dust from ultra-light and ultra-fine powders. This solves the industry pain points of ultra-light powders being prone to floating, leakage, and environmental pollution, meeting the high-cleanliness production requirements of cleanrooms, fine chemicals, lithium battery materials, and new powder materials. Equipped with an independent transparent glass cover, operators can directly observe the unpacking status, powder balance, and material feeding progress throughout the entire process. Real-time monitoring of the operating conditions can be achieved without opening the cover, avoiding material waste and equipment jamming caused by blind operation. The controllability is greatly improved. Equipped with air pressure compensation valves 1-3, it can balance the internal pressure of the sealing cover with the external atmospheric pressure in real time. This avoids the formation of negative pressure vacuum in the cavity during the negative pressure suction process and excessive pressure during the positive pressure inflation process. It also prevents problems such as sealing cover deformation, cavity pressure buildup, poor powder suction, and dust emission due to cavity pressure relief. It ensures that the pressure in the sealed cavity is constant and stable. The symmetrically arranged double glove operation ports 1-2 are suitable for manual two-handed unpacking operations. The entire operation can be carried out with hands inside the sealed cavity without opening the sealing cover, thus blocking dust leakage from the source and balancing operation convenience and dust-free sealing.

[0039] The mobile loading trolley 2 includes a mobile trolley body 2-1, which is connected to the bottom of the visual glove box sealing cover 1. The two are interconnected. The material cutting-off pneumatic ball valve 3-4, the pipeline purging pneumatic butterfly valve 3-5, and the solid-gas ratio regulating valve 3-6 belong to the pneumatic lifting suction pipe assembly 3. The material cutting-off pneumatic ball valve 3-4 is bypassed and connected to the pipeline purging pneumatic butterfly valve 3-5. The pipeline purging pneumatic butterfly valve 3-5 is connected to the solid-gas ratio regulating valve 3-6.

[0040] Adopting a mobile vehicle structure, it can be quickly pushed into and out of the metering station, enabling rapid material change, cleaning, and equipment maintenance without the need for overall equipment disassembly. This significantly improves the efficiency of batch material change operations and is suitable for multi-batch, small-volume ultralight powder production. The mobile trolley body 2-1 and the visual glove box sealing cover 1 are precisely connected and their inner cavities are interconnected, forming an integrated sealed working chamber without any gaps. This eliminates dust leakage at the connection point and ensures the integrity of the overall dust-free operation system. Equipped with a shock-absorbing buffer plate mechanism 2-3, it can offset the equipment vibration caused by pneumatic lifting, negative pressure suction, and airflow fluctuations, avoiding vibration interference with high-precision weighing data, effectively improving the accuracy of weight loss measurement, and eliminating measurement errors caused by vibration drift of ultralight powder.

[0041] The pneumatic lifting suction pipe assembly 3 includes a pneumatic lifting suction pipe 3-1, a lifting drive cylinder 3-2 for the pneumatic lifting suction pipe 3-1, and symmetrically arranged guide shafts 3-3 fixedly installed on the left and right sides of the pneumatic lifting suction pipe assembly 3.

[0042] The pneumatic lifting suction pipe 3-1 is automatically raised and lowered by the lifting drive cylinder 3-2. The suction height can be adaptively adjusted according to the remaining powder material, avoiding empty suction or excessive material blockage due to excessive insertion. It is suitable for the characteristics of ultra-light powder materials that are loose, easy to settle, and easily suspended. The symmetrical guide shafts 3-3 on both sides ensure precise guidance during the lifting process, preventing suction pipe deviation, shaking, and jamming, ensuring smooth lifting operation, and further avoiding powder dust and metering fluctuations caused by shaking. The material cutting-off pneumatic ball valve 3-4 can precisely cut off and open the suction pipe, achieving precise... The start / stop feeding mechanism, combined with loss-in-weight metering, enables quantitative feeding, eliminating issues of overfeeding or underfeeding. The pneumatic butterfly valve 3-5 allows switching of the air path after operation, introducing airflow to purge residual ultralight powder from the pipeline, thoroughly resolving issues such as ultrafine powder adhering to the pipeline, clumping and blocking, and batch mixing, eliminating the need for manual pipeline cleaning. The solid-gas ratio regulating valve 3-6 precisely adjusts the solid-gas mixing ratio in the pipeline, adapting to ultralight powders of different bulkiness and densities, preventing excessive negative pressure from drawing in powder and insufficient negative pressure from underfeeding, stabilizing the conveying flow rate, and improving feeding uniformity.

[0043] The weighing base 4 includes a weighing base plate 4-1, a high-precision weighing sensor 4-2 installed on one side of the weighing base plate 4-1, a pneumatic locking device 4-3 installed on the other side, and a ground base 4-4 set on the outer side of the weighing base plate 4-1. The base 4-4 contacts the ground to achieve the bearing of the whole machine.

[0044] The high-precision weighing sensor 4-2, in conjunction with the closed and stable operating conditions of the entire machine, collects the real-time changes in the overall weight of the trolley and accurately calculates the material feeding amount using the weight loss method. It achieves high-precision quantitative measurement for ultra-light powder micro-feeding scenarios, with a measurement accuracy far exceeding that of traditional volumetric feeding equipment. The pneumatic lock 4-3 can accurately position and lock the mobile loading trolley 2, preventing trolley displacement and shaking during operation, completely eliminating weighing errors caused by displacement, and ensuring the accuracy and validity of the measurement data. The floor-mounted base 4-4 is flush with the ground, bearing the weight of the entire machine, reducing the transmission of vibration during operation, improving the overall stability and durability of the machine, and making it suitable for long-term continuous industrial operations.

[0045] The pneumatic locking device 4-3 is used to position and lock the mobile loading trolley 2. This unpacking machine is compatible with an external vacuum feeder and uses the loss-in-weight method to complete the powder metering.

[0046] The airbag sealing assembly includes an airbag 10 and a ring tube 103. The airbags 10 are respectively arranged inside the two glove operation ports 1-2. The ring tube 103 is fixed to the inner wall of the visual glove box sealing cover 1. An air injection valve 101 and an air release valve 102 are respectively installed on the side walls of the two glove operation ports 1-2 that are far apart from each other. The air injection valve 101 and the air release valve 102 are both fixed to the inner wall of the visual glove box sealing cover 1. The ring tube 103 is connected to the two airbags 10 through an air supply pipe.

[0047] The air bladder 10 is embedded inside the glove operating opening 1-2. It is simultaneously inflated and deflated via the air injection valve 101, the air release valve 102, and the ring tube 103. This allows it to fit tightly against the operator's arm, sealing the glove operating opening and completely eliminating the dust and air leakage defects of traditional glove openings. It achieves a flexible seal, adaptable to different arm sizes, and has excellent sealing adaptability. Through the mechanical linkage structure of the motor, shaft 108, cam 109, built-in rod 1090, piston rod 106, and arc-shaped groove 107, it can automatically drive the air cylinder 104 to complete the air injection and pressure stabilization actions, in conjunction with the connecting tube 1. The internal one-way valve 05 enables one-way pressure maintenance in the air circuit, preventing air leakage and pressure drop in the airbag. It eliminates the need for manual pressure control, achieving automated and intelligent sealing. The one-way valve can lock the internal air pressure of the ring pipe 103 and the airbag 10, ensuring stable air pressure during operation and preventing sealing failure and dust leakage due to insufficient air pressure. This ensures the stability of dust-free operation throughout the process. The air injection valve 101 is electrically linked with the drive motor, enabling synchronous linkage between equipment start-up and shutdown, operation procedures, and airbag sealing status. The equipment automatically inflates and seals during operation and automatically depressurizes after shutdown. The structure has strong linkage and a high degree of automation.

[0048] An air injection cylinder 104 is provided below the ring pipe 103. The air injection cylinder 104 is connected to the inside of the visual glove box sealing cover 1. A piston rod 106 is slidably mounted in the middle of the air injection cylinder 104. The top of the air injection cylinder 104 is connected to the ring pipe 103 through a connecting pipe 105. A one-way valve is installed in the connecting pipe 105. An arc groove 107 is opened in the middle of the piston rod 106.

[0049] A motor is installed inside the sealing cover 1 of the visual glove box. The motor drives the shaft 108 to rotate. A cam 109 is fixed at the end of the shaft 108. An internal rod 1090 is fixed to the outside of the cam 109. The internal rod 1090 is slidably assembled inside the arc groove 107. The air injection valve 101 is electrically connected to the motor that drives the shaft 108 to rotate.

[0050] A dust-free unpacking machine for metering ultralight powders includes the following steps during use:

[0051] S1: Initial Preparation Phase

[0052] The pneumatic lifting suction pipe assembly 3 is raised to the highest stroke position, the visual glove box sealing cover 1 is opened, the material cutting pneumatic ball valve 3-4 remains closed, the pipeline purging pneumatic butterfly valve 3-5 remains open, the high-precision weighing sensor 4-2 performs automatic zeroing, the mobile loading trolley 2 is pushed to the metering weighing base 4 and locked in position using a pneumatic locker, the visual glove box sealing cover 1 is closed, and the operator's hands pass through the glove operation port 1-2 to enter the sealed cavity to complete the powder unpacking operation;

[0053] S2: Start the external vacuum feeder, open the material cut-off pneumatic ball valve 3-4, close the pipeline purging pneumatic butterfly valve 3-5, control the pneumatic lifting suction pipe assembly 3 to descend as a whole, and transport the powder material by relying on negative pressure. The moving trolley box is equipped with a shock-absorbing buffer plate mechanism 2-3 to ensure stable weighing. When the weighing value reaches the set discharge weight, stop the downward movement of the pneumatic lifting suction pipe 3-1, close the material cut-off pneumatic ball valve 3-4, reopen the pipeline purging pneumatic butterfly valve 3-5, control the pneumatic lifting suction pipe 3-1 to rise, and introduce airflow to purge the residual powder material in the pipeline. After the purging delay ends, turn off the vacuum feeder.

[0054] Compared to existing technologies, this device can be directly used with a general vacuum feeder without modifying the negative pressure equipment. It has high compatibility and is suitable for most powder negative pressure conveying production lines. The entire process involves sealed unpacking, negative pressure material suction, and self-cleaning of pipelines, with no dust leakage and no material residue, protecting the health of operators. At the same time, it avoids powder contamination and impurity mixing, ensuring the purity of ultra-light powder products. It is specifically optimized for the characteristics of ultra-light, ultra-fine, easily floating, easily dusty, easily clogged, and difficult to meter powders, solving the industry problems of high dust, inaccurate metering, easy clogging, and high material loss of traditional unpacking machines.

[0055] Working Principle: In the initial standby state, the pneumatic lifting suction pipe assembly 3 is raised to its highest stroke position, the material cutting pneumatic ball valve 3-4 is closed, and the pipeline purging pneumatic butterfly valve 3-5 remains open, preparing for subsequent pipeline purging and equipment alignment. At the start of operation, first open the visual glove box sealing cover 1, and push the mobile loading trolley 2 to the working position of the weighing base 4. The pneumatic locking device 4-3 on the weighing base 4 mechanically positions and locks the mobile loading trolley 2, preventing displacement and shaking during operation and eliminating weighing errors at the source. Simultaneously, the high-precision weighing sensor 4-2 automatically zeros and calibrates. The base 4-4 bears the entire weight of the machine throughout the process, reducing equipment vibration transmission and ensuring station stability. After the station alignment and locking are completed, close the visual glove box sealing cover 1, ensuring precise alignment and airtight connection between the mobile trolley body 2-1 and the inner cavity of the visual glove box sealing cover 1, forming a seamless integrated working cavity. Subsequently, the equipment initiates the automated sealing program. The motor drive shaft 108 inside the visual glove box sealing cover 1 drives the cam 109 to rotate. The built-in rod 1090 outside the cam 109 slides within the arc groove 107 of the piston rod 106, driving the piston rod 106 to slide back and forth inside the air injection cylinder 104. This, in conjunction with the electrically linked air injection valve 101 and air release valve 102, completes automatic pressure inflation and deflation. Gas is delivered via connecting pipe 105 and ring pipe 103 to the airbags 10 symmetrically arranged inside the glove operating openings 1-2. The airbags 10 inflate and expand to tightly fit the outer wall of the operator's arm, achieving a flexible seal at the gaps of the glove operating openings 1-2. The one-way valve inside the connecting pipe 105 can maintain pressure in one direction in the air path, preventing airbag depressurization and leakage, ensuring a dust-free sealing effect throughout the process. During the sealing operation, the air pressure compensation valves 1-3 on the side of the visual glove box sealing cover 1 continuously balance the sealed cavity with the external atmosphere. The pressure effectively avoids the problems of vacuum pressure buildup in the negative pressure suction chamber and excessive positive pressure inflation, preventing deformation of the sealing cover, poor powder suction, and dust leakage, and maintaining constant pressure inside the chamber. Operators can observe the powder status and suction progress inside the chamber in real time through the transparent glass cover 1-1. At the same time, they can use their hands through the sealed glove operating ports 1-2 to complete the powder packaging bag unpacking operation inside the sealed chamber, with no dust leakage throughout the process. After the unpacking operation is completed, the external vacuum feeder is started, and the equipment switches to the feeding and metering mode: the pipeline purging pneumatic butterfly valve 3-5 is closed, the material cut-off pneumatic ball valve 3-4 is opened, and the negative pressure feeding pipeline is opened. At the same time, the pneumatic lifting suction pipe 3-1 is driven to descend smoothly by the lifting drive cylinder 3-2, and the double-sided guide shaft 3-3 precisely guides the lifting action, preventing the suction pipe from deviating, shaking, or jamming. It is suitable for the characteristics of ultra-light powder that is loose and easy to lift, avoiding the problems of empty suction and material blockage.During operation, the solid-gas ratio regulating valve 3-6 adjusts the solid-gas mixing ratio in the pipeline in real time, stabilizes the negative pressure conveying flow rate, adapts to ultra-light powders of different densities and fluffiness, and ensures uniform and stable feeding. Throughout the negative pressure feeding and metering process, the shock-absorbing buffer plate mechanism 2-3 at the bottom of the mobile loading trolley 2 effectively counteracts the equipment vibration caused by pneumatic lifting, airflow fluctuations, and negative pressure suction, preventing ultra-light powder from drifting and weighing data fluctuations. In conjunction with the high-precision weighing sensor 4-2, the overall weight change of the mobile loading trolley 2 is collected in real time, and the powder feeding amount is calculated in real time using the weight loss method, realizing micro-volume, high-precision quantitative metering of ultra-light powder. When the weighing data reaches the system's preset feeding weight, the system immediately stops the downward movement of the pneumatic lifting suction pipe 3-1 and simultaneously closes the material cutting-off pneumatic ball valve 3-4 to cut off the feeding pipeline, completing precise quantitative feeding. After feeding and metering are completed, the equipment automatically switches to pipeline purging and reset mode: the pipeline purging pneumatic butterfly valve 3-5 is reopened, controlling the pneumatic lifting suction pipe 3-1 to rise and reset, using negative pressure airflow to purge and clean the residual ultrafine powder inside the pipeline throughout the process, thoroughly avoiding powder adhesion to the pipeline, clumping and blockage, and batch mixing problems; after the delayed purging is completed, the external vacuum feeder is turned off, and the single unpacking and metering operation is completed. After the equipment stops, the motor-linked air circuit automatically depressurizes, the airbag 10 contracts and releases the seal, and the visual glove box sealing cover 1 can be opened directly, pushing out the mobile loading trolley 2 to complete material replacement, cleaning, or equipment maintenance operations.

[0056] The above description is merely an example and illustration of the concept of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the concept of the invention or exceed the scope defined in the claims, they should all fall within the protection scope of the present invention.

Claims

1. A dust-free unpacking machine for metering ultralight powder materials, comprising a mobile loading trolley (2), characterized in that, The mobile loading trolley (2) is equipped with a weighing base (4) below it and a visual glove box sealing cover (1) above it. The mobile loading trolley (2) is connected to a pneumatic lifting suction pipe assembly (3) inside. An airbag sealing assembly is installed inside the visual glove box sealing cover (1). A transparent glass cover (1-1) is provided on one side of the upper part of the visual glove box sealing cover (1). Two glove operation ports (1-2) are symmetrically arranged on the side of the transparent glass cover (1-1) and connected to the outer edge of the visual glove box sealing cover (1). A pressure compensation valve (1-3) is installed on the side of the transparent glass cover (1-1). The pressure compensation valve (1-3) is connected to the inner cavity of the visual glove box sealing cover (1). The airbag sealing assembly includes an airbag (10) and a ring tube (103). The airbag (10) is arranged inside the two glove operation ports (1-2). The ring tube (103) is fixed to the inner wall of the visual glove box sealing cover (1). An air injection valve (101) and an air release valve (102) are respectively installed on the side walls of the two glove operation ports (1-2) that are far apart from each other. The air injection valve (101) and the air release valve (102) are both fixed to the inner wall of the visual glove box sealing cover (1). The ring tube (103) is connected to the two airbags (10) through an air supply pipe. The inner side of the visual glove box sealing cover (1) is equipped with a motor. The motor drives the shaft (108) to rotate. The end of the shaft (108) is fixed with a cam (109). The outer side of the cam (109) is fixed with an internal rod (1090). The internal rod (1090) is slidably assembled inside the arc groove (107). The air injection valve (101) is electrically connected to the motor that drives the shaft (108) to rotate.

2. The dust-free unpacking machine for metering ultralight powder materials according to claim 1, characterized in that, The mobile loading trolley (2) includes a mobile trolley body (2-1), which is connected to the bottom of the visual glove box sealing cover (1). The two are interconnected. The material cut-off pneumatic ball valve (3-4), the pipeline purging pneumatic butterfly valve (3-5), and the solid-gas ratio regulating valve (3-6) belong to the pneumatic lifting suction pipe assembly (3). The material cut-off pneumatic ball valve (3-4) is connected to the pipeline purging pneumatic butterfly valve (3-5) by bypass. The pipeline purging pneumatic butterfly valve (3-5) is connected to the solid-gas ratio regulating valve (3-6) by pipeline.

3. A dust-free unpacking machine for metering ultralight powder materials according to claim 3, characterized in that, The pneumatic lifting suction pipe assembly (3) includes a pneumatic lifting suction pipe (3-1), which is equipped with a lifting drive cylinder (3-2). The pneumatic lifting suction pipe assembly (3) has symmetrically arranged guide shafts (3-3) fixedly installed on the left and right sides.

4. A dust-free unpacking machine for metering ultralight powder materials according to claim 3, characterized in that, The weighing base (4) includes a weighing base plate (4-1), a high-precision weighing sensor (4-2) is installed on one side of the weighing base plate (4-1), and a pneumatic locking device (4-3) is installed on the other side. A ground base (4-4) is set on the outside of the weighing base plate (4-1), and the base (4-4) contacts the ground to realize the bearing of the whole machine.

5. A dust-free unpacking machine for metering ultralight powder materials according to claim 4, characterized in that, The pneumatic locking device (4-3) is used to position and lock the mobile loading trolley (2). This unpacking machine is compatible with an external vacuum feeder and uses the loss-in-weight method to complete the powder metering.

6. A dust-free unpacking machine for metering ultralight powder materials according to claim 5, characterized in that, An air injection cylinder (104) is provided below the annular pipe (103). The air injection cylinder (104) is connected to the inside of the visual glove box sealing cover (1). A piston rod (106) is slidably assembled in the middle of the air injection cylinder (104). The top of the air injection cylinder (104) is connected to the annular pipe (103) through a connecting pipe (105). A one-way valve is installed in the connecting pipe (105). An arc groove (107) is opened in the middle of the piston rod (106).

7. A dust-free unpacking machine for metering ultralight powder materials according to claim 1, characterized in that, Includes the following steps: S1: Initial Preparation Phase The pneumatic lifting suction pipe assembly (3) is raised to the highest stroke position, the visual glove box sealing cover (1) is opened, the material cutting pneumatic ball valve (3-4) is kept closed, the pipeline purging pneumatic butterfly valve (3-5) is kept open, the high-precision weighing sensor (4-2) performs automatic zeroing, the mobile loading trolley (2) is pushed to the metering weighing base (4) station and locked in position using a pneumatic locker, the visual glove box sealing cover (1) is closed, and the operator's hand passes through the glove operation port (1-2) into the sealed cavity to complete the powder unpacking operation; S2: Start the external vacuum feeder, open the material cut-off pneumatic ball valve (3-4), close the pipeline purging pneumatic butterfly valve (3-5), control the pneumatic lifting suction pipe assembly (3) to descend as a whole, rely on negative pressure to convey powder, the moving trolley box is equipped with shock-absorbing buffer plate mechanism (2-3) to ensure stable weighing, when the weighing value reaches the set discharge weight, stop the pneumatic lifting suction pipe (3-1) from descending, close the material cut-off pneumatic ball valve (3-4), reopen the pipeline purging pneumatic butterfly valve (3-5), control the pneumatic lifting suction pipe (3-1) to rise, introduce airflow to purge residual powder in the pipeline, and shut down the vacuum feeder after the purging delay ends.

Images