High-precision automatic powder weighing device and system

Abstract

The utility model discloses a high-precision automatic powder weighing device and system, and relates to the technical field of laboratory sample weighing, the high-precision automatic powder weighing device comprises a fixed powder feeding system, a variable powder feeding system, a switching system and a weighing system, the fixed powder feeding system is used for controlling discharging of fixed powder, and the variable powder feeding system is used for controlling discharging of variable powder; the variable powder supply system is used for controlling blanking of sample powder, and the switching system is used for switching the fixed powder supply system and the variable powder supply system to respectively feed the fixed powder and the sample powder to the weighing cup; the weighing system is used for obtaining the weight of a weighing cup when the fixed powder and the sample powder are discharged, and the obtained information serves as the basis for controlling the fixed powder supply system and the variable powder supply system to be started and stopped. The high-precision automatic powder weighing device realizes full-automatic weighing of fixed powder and sample powder.

Description

Technical Field

[0001] The present application relates to the technical field of laboratory sample weighing, and in particular to a high-precision automatic powder weighing device and system. Background Art

[0002] When weighing samples with high precision in the laboratory, a high-precision electronic balance is generally used. High-precision electronic balances have very high requirements for the external environment and are generally equipped with wind shields.

[0003] When weighing, the operator first opens the wind shield and places the weighing cup (crucible) on the balance, then closes the wind shield and sets the electronic balance to zero. Then the wind shield is opened and the powder sample to be weighed is placed in it, and finally the wind shield is closed to view the weighing data. Due to the high precision requirements of weighing, multiple additions are required to obtain the required weight of the sample. The operation is complicated and time-consuming, requiring great patience from the weigher. Faced with a large number of samples that need to be weighed, it will greatly consume the time and energy of the weigher. Utility Model Content

[0004] The purpose of the present application is to provide a high-precision automatic powder weighing device, which realizes the full-automatic weighing of fixed powder and sample powder. Another purpose of the present application is to provide a high-precision automatic powder weighing system.

[0005] To achieve the above-mentioned objectives, the present application provides a high-precision automatic powder weighing device, comprising a fixed powder feeding system, a variable powder feeding system, a switching system and a weighing system, the fixed powder feeding system being used to control the feeding of fixed powder, the variable powder feeding system being used to control the feeding of sample powder, the switching system being used to switch the fixed powder feeding system and the variable powder feeding system to feed fixed powder and sample powder to a weighing cup respectively, the weighing system being used to obtain the weight of the weighing cup when feeding fixed powder and sample powder, and using the obtained information as a basis for controlling the start and stop of the fixed powder feeding system and the variable powder feeding system.

[0006] In some embodiments, the fixed powder feeding system comprises:

[0007] A silo assembly, the silo assembly being used to store fixed powder and implement primary unloading control when the fixed powder is unloaded;

[0008] A fixed powder feeding assembly is used to receive the fixed powder delivered by the silo assembly and implement secondary feeding control when feeding the fixed powder into the weighing cup.

[0009] In some embodiments, the fixed powder is a single type of powder; and / or,

[0010] The silo assembly and the fixed powder feeding assembly are controlled in a coordinated manner of primary material discharge control and secondary material discharge control.

[0011] In some embodiments, the silo assembly comprises:

[0012] A silo, the silo is used to store fixed powder;

[0013] A silo switch is provided at the outlet of the silo and is used to implement primary unloading control when unloading fixed powder.

[0014] In some embodiments, the silo switch comprises:

[0015] A discharge cavity, wherein the longitudinal section of the discharge cavity is V-shaped, and the discharge cavity has a large opening end connected to the outlet of the silo and a small opening end disposed toward the fixed powder feeding assembly;

[0016] Rollers, the rollers are arranged in pairs on the inner wall of the discharge chamber, and each pair of the rollers is meshed to achieve rolling and conveying control of the fixed powder when the rollers rotate;

[0017] A stepper motor is connected to the transmission shaft of the roller, and the stepper motor is used to control the rotation of the roller to implement primary unloading control when the fixed powder is unloaded.

[0018] In some embodiments, the fixed powder feed assembly comprises:

[0019] A first trough, the first trough being located below the discharge port of the silo assembly, and the first trough being provided with a material guide aligned with the discharge port of the silo assembly;

[0020] A first vibrator is connected to the first trough, and is used to make the fixed powder in the first trough discharge into the weighing cup by vibration so as to implement secondary discharge control when the fixed powder is discharged.

[0021] In some embodiments, the variable powder feeding system comprises:

[0022] A variable powder discharge assembly, the variable powder discharge assembly is used to grab a sample cup containing sample powder and pour the sample powder in the sample cup into the variable powder feeding assembly;

[0023] A variable powder feeding assembly is provided, wherein the variable powder feeding assembly is used to implement feeding control when feeding sample powder into a weighing cup.

[0024] In some embodiments, the sample powder is of multiple types, the number of sample cups is multiple, the sample powder in a single sample cup is of a single type, and the sample powder in multiple sample cups is of multiple types; the variable powder feeding system further includes a powder cleaning component, which is used to clean the sample powder in the variable powder feeding component after completing a single type of sample powder; and / or,

[0025] The variable powder discharge assembly comprises a rotating electric claw, and the rotating electric claw is used to grab a sample cup containing sample powder and pour the sample powder in the sample cup into the variable powder feeding assembly.

[0026] In some embodiments, the switching system includes a linear module, the fixed powder feeding system and the variable powder feeding system are installed on the linear module, and the linear module controls the movement of the fixed powder feeding system and the variable powder feeding system to achieve material feeding switching; and / or,

[0027] The weighing system comprises a high-precision balance; and / or,

[0028] The high-precision automatic powder weighing device also includes a discharge port assembly, which is located above the weighing system and below the fixed powder feeding system and the variable powder feeding system. The discharge port assembly includes a baffle, a baffle groove and a moving mechanism. The baffle is provided with a feeding hole that passes through the baffle groove from top to bottom. The moving mechanism is connected to the baffle groove. The moving mechanism is used to control the movement of the baffle groove to cover and reveal the feeding hole.

[0029] The present application also provides a high-precision automatic powder weighing system, comprising a transport module, a placing tray and the above-mentioned high-precision automatic powder weighing device, wherein the placing tray is divided into a placing tray for powder to be weighed and a placing tray for weighed powder, a sample cup is placed in the placing tray for powder to be weighed, the sample cup contains sample powder, and a weighing cup is placed in the placing tray for weighed powder.

[0030] Compared with the above-mentioned background technology, the high-precision automatic powder weighing device provided in the present application mainly includes a fixed powder feeding system, a variable powder feeding system, a switching system and a weighing system. The fixed powder feeding system is used to control the feeding of fixed powder, and the variable powder feeding system is used to control the feeding of sample powder. The switching system is used to switch the fixed powder feeding system and the variable powder feeding system to feed fixed powder and sample powder to the weighing cup respectively. The weighing system is used to obtain the weight of the weighing cup when feeding fixed powder and sample powder, and use the obtained information as the basis for controlling the start and stop of the fixed powder feeding system and the variable powder feeding system.

[0031] During the use of the high-precision automatic powder weighing device, fixed powder and sample powder are prepared in the fixed powder feeding system and the variable powder feeding system respectively for unloading; the first step is to unload the fixed powder, and the fixed powder feeding system is switched to the working position through the switching system, and then the fixed powder feeding system is used to control the unloading of the fixed powder, so that the fixed powder continuously enters the weighing cup, and the weighing system weighs the weighing cup in real time, that is, the weight of the weighing cup is obtained when the fixed powder is unloaded, and the fixed powder feeding system obtains the information obtained by the weighing system when the weighing weight reaches After reaching the set value, the fixed powder feeding system stops unloading; the second step is to unload the sample powder, switch the variable powder feeding system to the working position through the switching system, and then control the unloading of the sample powder through the variable powder feeding system, so that the sample powder continuously enters the weighing cup filled with fixed powder, and the weighing system weighs the weighing cup in real time, that is, obtains the weight of the weighing cup when unloading the sample powder. When the weighing weight reaches the set value, the variable powder feeding system stops unloading; after completing the weighing of the first weighing cup, repeat the above process to weigh the next weighing cup.

[0032] In combination with the above structure and process description, it can be seen that the high-precision automatic powder weighing device adopts a dual feeding system, which has at least the following beneficial effects: the high-precision automatic powder weighing device realizes fully automatic weighing of fixed powder and sample powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0034] Figure 1 A structural diagram of a high-precision automatic powder weighing device provided in an embodiment of the present application;

[0035] Figure 2 A structural diagram of a silo assembly provided in an embodiment of the present application;

[0036] Figure 3 A structural diagram of a fixed powder feeding assembly provided in an embodiment of the present application;

[0037] Figure 4 A structural diagram of a discharge port assembly provided in an embodiment of the present application;

[0038] Figure 5 This is a structural diagram of the high-precision automatic powder weighing system provided in an embodiment of the present application.

[0039] in:

[0040] Fixed powder feeding system 1, silo assembly 11, silo 111, silo switch 112, roller 1121, stepper motor 1122, fixed powder feeding assembly 12, first trough 121, first vibrator 122, material guide 123,

[0041] Variable powder feeding system 2, variable powder discharge assembly 21, variable powder feeding assembly 22, powder cleaning assembly 23, vacuum cleaner suction head 231, suction head moving mechanism 232,

[0042] Switching system 3.

[0043] Weighing system 4, high-precision balance 41, shock-absorbing platform 42,

[0044] The material outlet assembly 5, the baffle plate 51, the material passing hole 511, the baffle groove 52, the moving mechanism 53,

[0045] Transport module 6, robot 61, gripper 62,

[0046] Powder to be weighed is placed on a tray 7,

[0047] Weighed powder placement tray 8,

[0048] Sample cup 9,

[0049] Weighing cup 10,

[0050] High-precision automatic powder weighing device 100. DETAILED DESCRIPTION

[0051] The glass flake method is a sample pretreatment technology for X-ray fluorescence spectrometry (XRF). It melts the powder sample in a molten solvent to form a glass flake compound that is easy to analyze by XRF. It effectively eliminates the particle effect, matrix effect, mineral effect and other adverse factors of the sample, greatly improving the accuracy of XRF.

[0052] In order to make glass frits, the first step is to prepare samples, that is, to weigh the powder sample and the solvent according to a certain specific gravity, and the weight accuracy of the sample and the solvent is required to be as high as ±0.2mg. At present, the weighing of samples is mainly done manually, and the weighing process is very time-consuming and labor-intensive. If manual sample preparation is used, it will take a lot of time and energy.

[0053] Existing high-precision automatic weighing equipment can only weigh a single fixed powder and cannot achieve full automation of weighing. For example, it can only weigh specific powders (cosolvents), while different powder samples due to different test objects still need to be weighed manually, and the degree of automation is not high.

[0054] In response to the technical defects existing in the prior art, the present application provides a high-precision automatic powder weighing device, which aims to replace manual weighing with an automated weighing device, thereby simplifying the work content of weighers, reducing work intensity, and allowing weighers to apply their time to more innovative work.

[0055] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0056] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0057] Please refer to Figures 1 to 4 ,in, Figure 1 This is a structural diagram of a high-precision automatic powder weighing device provided in an embodiment of the present application. Figure 2 This is a structural diagram of a silo assembly provided in an embodiment of the present application. Figure 3 A structural diagram of a fixed powder feeding assembly provided in an embodiment of the present application, Figure 4 A structural diagram of the discharge port assembly provided in an embodiment of the present application.

[0058] In the first specific embodiment, the high-precision automatic powder weighing device provided by the embodiment of the present application mainly includes a fixed powder feeding system 1, a variable powder feeding system 2, a switching system 3 and a weighing system 4. The fixed powder feeding system 1 is used to control the feeding of fixed powder, the variable powder feeding system 2 is used to control the feeding of sample powder, the switching system 3 is used to switch the fixed powder feeding system 1 and the variable powder feeding system 2 to feed fixed powder and sample powder to the weighing cup 10 respectively, and the weighing system 4 is used to obtain the weight of the weighing cup 10 when feeding fixed powder and sample powder, and use the obtained information as the basis for controlling the start and stop of the fixed powder feeding system 1 and the variable powder feeding system 2.

[0059] The weighing system 4 is used to weigh the powder sample. The weighing object is the weighing cup 10 and the powder therein. The powder includes two types: fixed powder and sample powder. The fixed powder feeding system 1 uses the weight data fed back by the weighing system 4 to accurately control the feeding weight and feeding speed of the fixed powder. The variable powder feeding system 2 uses the weight data fed back by the weighing system 4 to accurately control the feeding weight and feeding speed of the sample powder.

[0060] During the use of the high-precision automatic powder weighing device, fixed powder and sample powder are first prepared in the fixed powder feeding system 1 and the variable powder feeding system 2 respectively and are waiting for unloading; the first step is to unload the fixed powder, and the fixed powder feeding system 1 is switched to the working position by the switching system 3, and then the unloading of the fixed powder is controlled by the fixed powder feeding system 1, so that the fixed powder continuously enters the weighing cup 10, and the weighing system 4 weighs the weighing cup 10 in real time, that is, the weight of the weighing cup 10 is obtained when the fixed powder is unloaded, and the fixed powder feeding system 1 obtains the information obtained by the weighing system 4, when the weighing weight reaches After reaching the set value, the fixed powder feeding system 1 stops unloading; the second step is to unload the sample powder, and the variable powder feeding system 2 is switched to the working position through the switching system 3, and then the unloading of the sample powder is controlled by the variable powder feeding system 2, so that the sample powder continuously enters the weighing cup 10 filled with fixed powder, and the weighing system 4 weighs the weighing cup 10 in real time, that is, the weight of the weighing cup 10 is obtained when unloading the sample powder. When the weighing weight reaches the set value, the variable powder feeding system 2 stops unloading; after completing the weighing of the first weighing cup 10, repeat the above process to weigh the next weighing cup 10.

[0061] In combination with the above structure and process description, it can be seen that the high-precision automatic powder weighing device adopts a dual feeding system, which has at least the following beneficial effects: the high-precision automatic powder weighing device realizes fully automatic weighing of fixed powder and sample powder.

[0062] In some embodiments, the fixed powder feeding system 1 includes a silo assembly 11 and a fixed powder feeding assembly 12 .

[0063] In this embodiment, the silo assembly 11 is used to store fixed powder and implement primary unloading control when the fixed powder is unloaded; the fixed powder feeding assembly 12 is used to receive the fixed powder delivered by the silo assembly 11 and implement secondary unloading control when the fixed powder is unloaded into the weighing cup 10. The two-level control of the unloading of fixed powder by the silo assembly 11 and the fixed powder feeding assembly 12 ensures high speed and accuracy of weighing.

[0064] In some embodiments, the fixed powder is a single type of powder.

[0065] Optionally, when a high-precision automatic powder weighing device is used for the preparation of glass flakes for XRF (X-ray Fluorescence) analysis, two kinds of powders need to be weighed in the weighing cup, one is a fixed powder (solvent), and the other is a powder sample for analysis. In this case, the fixed powder is a solvent, that is, a single type of powder. Compared with the existing technical solutions that can only weigh a fixed powder (i.e., solvent) but cannot weigh powder samples, the present application can not only weigh solvents but also powder samples to achieve fully automatic weighing.

[0066] In some embodiments, the silo assembly 11 and the fixed powder feeding assembly 12 are controlled in a coordinated manner of primary unloading control and secondary unloading control.

[0067] In this embodiment, the silo assembly 11 and the fixed powder feeding assembly 12 can be coordinated in feeding speed, and the powder will not accumulate in a ball, ensuring the uniformity of the powder. Optionally, the silo assembly 11 and the fixed powder feeding assembly 12 jointly control the unloading. At the beginning of weighing, the weighed weight deviates too much from the set weight. The silo assembly 11 unloads the material quickly while the fixed powder feeding assembly 12 feeds the material quickly. The weight in the weighing cup increases rapidly. When the weighed weight approaches the set weight, the unloading speed of the silo assembly 11 and the feeding speed of the fixed powder feeding assembly 12 are reduced at the same time to prevent overweight weighing. The coordination of the unloading speed of the silo assembly 11 and the feeding speed of the fixed powder feeding assembly 12 will prevent the powder from piling up in a ball, ensuring the uniformity of the powder. At the same time, the two-level control of powder feeding ensures the high speed and accuracy of weighing (the weighing weight accuracy can reach up to ±0.1mg).

[0068] Regarding the silo assembly 11 , in some embodiments, the silo assembly 11 includes a silo 111 and a silo switch 112 .

[0069] In this embodiment, the silo 111 is used to store fixed powder; the silo switch 112 is set at the outlet of the silo 111, and the silo switch 112 is used to implement primary unloading control when the fixed powder is unloaded, including the start and stop of unloading and the unloading speed. Through the combined use of the silo 111 and the silo switch 112, it can be used to store a single type of fixed powder and control the start and stop of unloading and the unloading speed according to demand.

[0070] Furthermore, in some embodiments, the silo switch 112 includes a discharge cavity, a roller 1121 and a stepping motor 1122 .

[0071] In this embodiment, the longitudinal section of the discharge chamber is V-shaped, and the discharge chamber has a large mouth end connected to the outlet of the silo 111 and a small mouth end arranged toward the fixed powder feeding assembly 12; rollers 1121 are arranged in pairs on the inner wall of the discharge chamber, and each pair of rollers 1121 is meshed to achieve the rolling and conveying control of the fixed powder by the rollers 1121 when rotating; the stepper motor 1122 is connected to the transmission shaft of the rollers 1121, and the stepper motor 1122 is used to control the rotation of the rollers 1121 to implement the first-level unloading control when the fixed powder is unloaded. The multifunctional silo switch 112 using the rollers 1121 as the main component can not only control whether to unload, but also control the unloading speed, and can also crush the powder into clumps.

[0072] As an option, taking the rollers 1121 as a pair as an example, the stepper motor 1122 drives the rollers 1121 to rotate to start feeding, and the feeding speed can be adjusted by controlling the speed of the stepper motor 1122. The rollers 1121 mesh with each other to crush the large granular powder, thereby ensuring the consistency of the powder particle size falling to the fixed powder feeding assembly 12.

[0073] In some embodiments, the fixed powder feeding assembly 12 includes a first trough 121 and a first vibrator 122 .

[0074] In this embodiment, the first trough 121 is located below the discharge port of the silo assembly 11, and a guide 123 aligned with the discharge port of the silo assembly 11 is provided on the first trough 121; the first vibrator 122 is connected to the first trough 121, and the first vibrator 122 is used to make the fixed powder in the first trough 121 discharge to the weighing cup 10 by vibration so as to implement secondary discharge control when the fixed powder is discharged. When in use, the powder falling from the silo assembly 11 falls on the first trough 121 through the guide 123, and the powder in the first trough 121 is continuously moved forward by the vibration of the first vibrator 122, and finally falls from the trough port of the first trough 121 to the weighing cup placed on the weighing system 4, and the feeding speed can be adjusted by adjusting the vibration frequency of the first vibrator 122.

[0075] In some embodiments, the variable powder feeding system 2 includes a variable powder discharge component 21 and a variable powder feed component 22 .

[0076] In this embodiment, the variable powder discharge component 21 is used to grab the sample cup 9 containing the sample powder and pour the sample powder in the sample cup 9 into the variable powder feeding component 22; the variable powder feeding component 22 is used to implement feeding control when feeding the sample powder into the weighing cup 10. Among them, the variable powder feeding component 22 is similar to the fixed powder feeding component 12, and is composed of a vibrator and a material trough. The powder poured by the variable powder discharge component 21 enters the material trough of the variable powder feeding component 22, and the powder in the material trough is continuously moved forward by the vibration of the vibrator, and finally falls from the material trough mouth to the weighing cup placed on the weighing system 4. The feeding speed can be adjusted by adjusting the vibration frequency of the vibrator. Among them, the variable powder discharge component 21 can be any device that can realize the pouring of powder.

[0077] Optionally, the variable powder discharge assembly 21 includes a rotating electric claw, which is used to grab the sample cup 9 containing the sample powder and pour the sample powder in the sample cup 9 into the variable powder feeding assembly 22.

[0078] In some embodiments, the sample powder is of multiple types, and there are multiple sample cups 9 . The sample powder in a single sample cup 9 is of a single type, and the sample powder in multiple sample cups 9 is of multiple types.

[0079] Furthermore, the variable powder feeding system 2 further includes a powder cleaning component 23, which is used to clean the sample powder in the variable powder feeding component 22 after a single type of sample powder is completed to prevent contamination between different powder samples. The powder cleaning component 23 can be a vacuum cleaner, a dust gun, a brush, or other devices that can remove powder.

[0080] Optionally, the powder cleaning assembly 23 includes a vacuum cleaner and a suction head moving mechanism 232, and the vacuum cleaner includes a vacuum cleaner body, a vacuum cleaner suction head 231, and a hose connecting the vacuum cleaner suction head 231 and the vacuum cleaner body. After the variable powder feeding system 2 and the weighing system 4 complete the weighing of a powder sample, the vacuum cleaner suction head 231, driven by the suction head moving mechanism 232, moves back and forth on the trough of the variable powder feeding assembly 22 until the powder on the trough is completely cleaned to prevent the residual powder from contaminating the subsequent powder to be weighed.

[0081] In some embodiments, the switching system 3 includes a linear module, and the fixed powder feeding system 1 and the variable powder feeding system 2 are installed on the linear module. The linear module controls the movement of the fixed powder feeding system 1 and the variable powder feeding system 2 to achieve material switching. The switching of the working positions of the fixed powder feeding system 1 and the variable powder feeding system 2 is achieved by the movement of the linear module. The linear module moves the discharge port position of the working position system to just above the weighing cup, so that the powder being weighed can fall into the weighing cup.

[0082] For example, when fixed powder is being fed, the linear module moves to the left so that the material slot opening in the fixed powder feeding system 1 is above the weighing cup, and the powder can fall smoothly into the weighing cup; when sample powder is being fed, the linear module moves to the right so that the material slot opening in the variable powder feeding system 2 is above the weighing cup, and the powder can fall smoothly into the weighing cup.

[0083] In some embodiments, the high-precision automatic powder weighing device also includes a discharge port assembly 5, which is located above the weighing system 4, and the discharge port assembly 5 is located below the fixed powder feeding system 1 and the variable powder feeding system 2. The discharge port assembly 5 includes a baffle 51, a baffle groove 52 and a moving mechanism 53. The baffle 51 is provided with a feed hole 511 which passes through the baffle groove 52 from top to bottom. The moving mechanism 53 is connected to the baffle groove 52. The moving mechanism 53 is used to control the movement of the baffle groove 52 to cover and reveal the feed hole 511.

[0084] In this embodiment, in order to ensure that after weighing, the powder in the trough will not be abnormally discharged due to external disturbances and affect the weighing accuracy, a discharge port assembly 5 can be set above the weighing container, and the feeding hole 511 is located directly above the weighing system 4. The weighing container needs to be placed directly below the feeding hole 511. Only when the trough opening is directly above the feeding hole 511, the weighed powder will fall into the weighing container through the feeding hole. When weighing is completed, the retaining groove 52 will seal the feeding hole 511 under the drive of the moving mechanism 53, thereby ensuring that the powder in the trough cannot fall into the sample container.

[0085] In some embodiments, the weighing system 4 includes a high-precision balance 41 , on which a weighing container, namely a weighing cup 10 , is placed, and the high-precision balance 41 is used to weigh the weighing cup 10 in real time.

[0086] Optionally, the weighing system 4 further includes a shock absorbing platform 42 , and the high-precision balance 41 is arranged on the shock absorbing platform 42 . The shock absorbing platform 42 ensures that the high-precision balance 41 is not affected by external vibrations.

[0087] Please refer to Figure 5 , Figure 5 This is a structural diagram of the high-precision automatic powder weighing system provided in an embodiment of the present application.

[0088] The present application also provides a high-precision automatic powder weighing system, including a transport module 6, a placing plate and the above-mentioned high-precision automatic powder weighing device 100, wherein the placing plate is divided into a powder placing plate 7 for weighed powder and a weighed powder placing plate 8, a sample cup 9 is placed in the powder placing plate 7 for weighed powder, and the sample cup 9 contains sample powder, and a weighing cup 10 is placed in the weighed powder placing plate 8. Before weighing begins, the weighing cup 10 is empty.

[0089] In this embodiment, in order to realize automatic weighing, a transport module 6 and a placement plate are arranged on the periphery of the high-precision automatic powder weighing device 100. The transport module 6 includes a robot 61 and a gripper 62, and is responsible for placing the sample cup 9 and the weighing cup 10 at the designated position.

[0090] In a specific embodiment, the operation process of the high-precision automatic powder weighing system is as follows.

[0091] 1. Place several sample cups filled with powder to be weighed on the tray for the powder to be weighed, and place empty weighing cups on the tray for the weighed powder (the number of weighing cups is the same as the number of powder sample cups).

[0092] 2. The handling module replaces manual work to place the first weighing cup on the balance, and then feeds the first sample cup into the rotating electric claw of the variable powder feeding system, which clamps the sample cup.

[0093] 3. The switching system moves so that the variable powder feeding system is in the working position (that is, the material slot of the variable powder feeding system is directly above the feeding hole).

[0094] 4. Move the retaining groove of the discharge port assembly to open the feed hole.

[0095] 5. The electric gripper rotates to pour the powder sample in the powder sample cup into the trough of the variable powder feeding system. The vibrator starts working to move the powder sample forward along the trough and finally falls into the weighing cup. The device continuously receives real-time weighing data from the electronic balance. When the weighing weight reaches the set value, the vibrator stops and the feeding hole is closed.

[0096] 6. The powder cleaning system starts working. The suction head of the vacuum cleaner moves back and forth on the trough to clean the residual powder.

[0097] 7. Switch the system to work so that the fixed powder feeding system is in the working position.

[0098] 8. Move the retaining groove of the discharge port assembly to open the feed hole.

[0099] 9. The hopper switch is turned on, the fixed powder starts to be discharged, and the vibrator works to continuously feed the solid powder into the weighing cup. When the weighing weight reaches the set value, the hopper switch is turned off, the vibrator stops, and the feeding hole is closed.

[0100] 10. The transport module puts the weighing cup back to the weighed powder placement tray, and takes the powder sample cup from the rotating electric claw back to the powder placement tray to be weighed.

[0101] 11. After the weighing of the first weighing cup is completed, proceed to the weighing of the next weighing cup.

[0102] It should be noted that many of the components mentioned in this application are universal standard parts or components known to those skilled in the art, and their structures and principles can be learned by those skilled in the art through technical manuals or through conventional experimental methods.

[0103] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0104] The above is a detailed introduction to the high-precision automatic powder weighing device and system provided by the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A high-precision automatic powder weighing device, characterized in that: It includes a fixed powder feeding system, a variable powder feeding system, a switching system and a weighing system. The fixed powder feeding system is used to control the feeding of fixed powder, the variable powder feeding system is used to control the feeding of sample powder, the switching system is used to switch the fixed powder feeding system and the variable powder feeding system to feed fixed powder and sample powder to a weighing cup respectively, and the weighing system is used to obtain the weight of the weighing cup when feeding fixed powder and sample powder, and use the obtained information as a basis for controlling the start and stop of the fixed powder feeding system and the variable powder feeding system.

2. The high-precision automatic powder weighing device according to claim 1, characterized in that: The fixed powder feeding system comprises: A silo assembly, the silo assembly being used to store fixed powder and implement primary unloading control when the fixed powder is unloaded; A fixed powder feeding assembly is used to receive the fixed powder delivered by the silo assembly and implement secondary feeding control when feeding the fixed powder into the weighing cup.

3. The high-precision automatic powder weighing device according to claim 2, characterized in that: The fixed powder is a single type of powder; and / or, The silo assembly and the fixed powder feeding assembly are controlled in a coordinated manner of primary material discharge control and secondary material discharge control.

4. The high-precision automatic powder weighing device according to claim 2, characterized in that: The silo assembly comprises: A silo, the silo is used to store fixed powder; A silo switch is provided at the outlet of the silo and is used to implement primary unloading control when unloading fixed powder.

5. The high-precision automatic powder weighing device according to claim 4, characterized in that: The silo switch comprises: A discharge cavity, wherein the longitudinal section of the discharge cavity is V-shaped, and the discharge cavity has a large opening end connected to the outlet of the silo and a small opening end disposed toward the fixed powder feeding assembly; Rollers, the rollers are arranged in pairs on the inner wall of the discharge chamber, and each pair of the rollers is meshed to achieve rolling and conveying control of the fixed powder when the rollers rotate; A stepper motor is connected to the transmission shaft of the roller, and the stepper motor is used to control the rotation of the roller to implement primary unloading control when the fixed powder is unloaded.

6. The high-precision automatic powder weighing device according to claim 2, characterized in that: The fixed powder feeding assembly comprises: A first trough, the first trough being located below the discharge port of the silo assembly, and the first trough being provided with a material guide aligned with the discharge port of the silo assembly; A first vibrator is connected to the first trough, and is used to make the fixed powder in the first trough discharge into the weighing cup by vibration so as to implement secondary discharge control when the fixed powder is discharged.

7. The high-precision automatic powder weighing device according to claim 1, characterized in that: The variable powder feeding system comprises: A variable powder discharge assembly, the variable powder discharge assembly is used to grab a sample cup containing sample powder and pour the sample powder in the sample cup into the variable powder feeding assembly; A variable powder feeding assembly is provided, wherein the variable powder feeding assembly is used to implement feeding control when feeding sample powder into a weighing cup.

8. The high-precision automatic powder weighing device according to claim 7, characterized in that: The sample powder is of multiple types, the number of sample cups is multiple, the sample powder in a single sample cup is of a single type, and the sample powder in multiple sample cups is of multiple types; the variable powder feeding system further includes a powder cleaning component, which is used to clean the sample powder in the variable powder feeding component after completing the single type of sample powder; and / or, The variable powder discharge assembly comprises a rotating electric claw, and the rotating electric claw is used to grab a sample cup containing sample powder and pour the sample powder in the sample cup into the variable powder feeding assembly.

9. The high-precision automatic powder weighing device according to claim 1, characterized in that: The switching system comprises a linear module, the fixed powder feeding system and the variable powder feeding system are installed on the linear module, and the linear module realizes material feeding switching by controlling the movement of the fixed powder feeding system and the variable powder feeding system; and / or, The weighing system comprises a high-precision balance; and / or, The high-precision automatic powder weighing device also includes a discharge port assembly, which is located above the weighing system and below the fixed powder feeding system and the variable powder feeding system. The discharge port assembly includes a baffle, a baffle groove and a moving mechanism. The baffle is provided with a feeding hole that passes through the baffle groove from top to bottom. The moving mechanism is connected to the baffle groove. The moving mechanism is used to control the movement of the baffle groove to cover and reveal the feeding hole.

10. A high-precision automatic powder weighing system, characterized in that: It comprises a transport module, a placing plate and a high-precision automatic powder weighing device as described in any one of claims 1 to 9, wherein the placing plate is divided into a placing plate for powder to be weighed and a placing plate for weighed powder, a sample cup is placed in the placing plate for powder to be weighed, the sample cup contains sample powder, and a weighing cup is placed in the placing plate for weighed powder.

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