Automatic sample weighing instrument

Abstract

The utility model discloses an automatic sample weighing instrument. The automatic sample weighing instrument comprises a main body, a lofting module, a sampling module, a sample weighing module and a cleaning module, the lofting module and the sampling module are both movably arranged on the main body, and the sample weighing module and the cleaning module are both fixedly arranged on the main body; the lofting module is used for fixing and storing samples; the sampling module is used for extracting the sample stored in the sample placing module and transferring the sample to the sample weighing module, the sampling module comprises a vibration exciter and a sampling mechanism capable of being opened and closed, the vibration exciter is connected with the sampling mechanism, and the vibration exciter can vibrate the sample in the sampling mechanism so as to add the sample into the sample weighing module; the sample weighing module is used for weighing the weight of a sample; the cleaning module is used for cleaning the sampling module. The sampling module of the automatic sample weighing instrument is arranged, so that the sampling mechanism can be closed after a sample is taken, and flying dust pollution in the transfer process is avoided. Moreover, not only can the sample be taken, but also the sample can be transferred and added, so that the automatic sample adding process is simplified, and the sample adding efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of sample testing technology, and more specifically, to an automatic sample weighing instrument. Background Technology

[0002] In the field of coal analysis, calorific value analysis, industrial analysis, and elemental analysis are often required. Many of these analyses necessitate weighing coal samples of a specified mass. Weighing is usually done manually. The typical procedure involves first tareing the empty crucible on a balance, then using a sampling spoon to scoop the sample from the container in several portions, shaking the crucible above it to achieve the target mass.

[0003] In recent years, the weighing of coal analysis samples has begun to be automated. A robotic arm holds a sampling spoon to take a spoonful of coal sample from the coal bottle and pours it into a sample receiving device. The sample receiving device, based on feedback from a balance, dispenses the required mass of coal sample into a crucible, and then the sampling spoon and sample receiving device are cleaned separately.

[0004] In the field of coal quality weighing, it is generally necessary to weigh the sample before analysis. According to national standards, the weighing range of coal analysis samples should be wide, with small weighing errors. Weighing can range from micro-weighing within 100mg to weighing up to 1000mg, and even some weighings can have an accuracy of ±5mg. In manual weighing, because the sample is coal powder with a wide weighing range, and the crucible itself is small, residue and spillage are easy to occur during operation, causing weighing errors and contamination. Furthermore, most existing automated sample loading and weighing equipment involves transferring the sample from a specific sample bottle to the crucible, and the sample transfer process is prone to leakage. During use, the vibration of coal ash can easily cause it to compact, making sample loading inconvenient. After use, the equipment easily becomes heavily soiled and difficult to clean.

[0005] Therefore, how to improve the sampling efficiency of sampling and weighing equipment, avoid coal ash splashing, and facilitate cleaning after use are urgent problems to be solved. Utility Model Content

[0006] The purpose of this invention is to provide an automatic sample weighing instrument. The automatic sample weighing instrument provided by this invention can effectively improve the sample adding efficiency of sample weighing equipment, avoid coal ash splashing, and facilitate cleaning after use.

[0007] To achieve the above objectives, the technical solution of this utility model is as follows:

[0008] An automatic weighing instrument is used for the automated weighing of coal analysis samples. The automatic weighing instrument includes: a main body, a sample release module, a sample taking module, a sample weighing module, and a cleaning module.

[0009] Both the sampling module and the weighing module are movably mounted on the main body, while both the weighing module and the cleaning module are fixedly mounted on the main body.

[0010] The sampling module is used to fix and store samples for coal analysis;

[0011] The sampling module is used to extract the sample stored in the sampling module and transfer the sample to the weighing module. The sampling module includes a vibrator and an openable sampling mechanism. The vibrator is connected to the sampling mechanism and can vibrate the sample in the sampling mechanism to add the sample to the weighing module.

[0012] The weighing module is used to weigh the sample;

[0013] The cleaning module is used to clean the sampling module.

[0014] Preferably, the sampling mechanism includes a driving component and an openable / closable sampling component;

[0015] The sampling component is connected to the driving component to drive the rotation and / or opening and closing of the sampling component.

[0016] Preferably, the sampling assembly includes a sampling spoon and a cover plate;

[0017] The cover plate is movably mounted on the sampling spoon. One end of the cover plate is fixedly connected to a pull rod, which is rotatably connected to the drive assembly to drive the extension and / or rotation of the pull rod. One end of the sampling spoon is fixedly connected to a connecting rod, which is rotatably connected to the drive assembly to drive the rotation of the connecting rod.

[0018] Preferably, the drive assembly includes a translation motor, a rotation motor, a rotation belt, a drive pulley, and a rotation pulley;

[0019] The output end of the translation motor is provided with a telescopic rod, which is rotatably connected to the pull rod. The output end of the rotation motor is connected to the drive wheel, and the drive wheel is connected to the rotation wheel through the rotation belt. The rotation wheel is fixedly connected to the connecting rod and the pull rod.

[0020] Preferably, the sampling module includes a sampling base, a container for receiving and storing samples, a positioning member for fixing the container, and a sampling port for the sampling module to take samples.

[0021] The receiving component is detachably mounted on the laying-out base. The positioning component is connected to the laying-out base and can abut against the receiving component to clamp and position the receiving component. The sampling port is openable and closable at one end of the receiving component.

[0022] Preferably, the weighing module includes a weighing port, a balance mechanism, a weighing pan adjustment mechanism, and a weighing container;

[0023] The weighing port is located above the balance mechanism, and the weighing containers are all located on the balance mechanism and rotate with the rotation of the balance mechanism. The balance mechanism is rotatably mounted on the main body, and the weighing pan adjustment mechanism is located on the main body and below the balance mechanism.

[0024] Preferably, the cleaning module includes a housing, a cleaning brush, a limiting sleeve, a negative pressure port, and a hose;

[0025] The housing is fixedly mounted on the main body, the limiting sleeve is fixedly mounted on one end of the housing, the cleaning brush is mounted on the inner wall of the housing and the limiting sleeve abuts against and limits the cleaning brush, and the other end of the housing is provided with the negative pressure port, which is connected to an air pump through the hose to suck up impurities inside the housing.

[0026] Preferably, the main body includes a base plate, a first motion component, a second motion component, and an automatic control module;

[0027] The lofting module is disposed on the first motion component to facilitate sampling by the sampling module, the sampling module is disposed on the second motion component, and both the first motion component and the second motion component are disposed on the base plate;

[0028] The sampling module, weighing module, and cleaning module are all electrically connected to the automatic control module.

[0029] Preferably, both the first motion component and the second motion component include a drive element and a motion rod;

[0030] Both the driving component and the moving rod are fixedly mounted on the base plate. The moving rod is connected to the driving component to drive the moving rod to reciprocate. The moving rod of the first moving component is set at an inclined angle to the axis of the lofting module, and the angle of the inclined angle is less than 10°.

[0031] The beneficial effects of this utility model are as follows:

[0032] This automatic sample weighing instrument features an openable and closable sampling mechanism in its sampling module. This mechanism allows the sampling module to close promptly after taking a sample from the sample dispensing module, preventing splashing and dust pollution during sample transfer. Furthermore, the sampling module eliminates the sample receiving process found in traditional automatic sample dispensing equipment. It simplifies the automatic dispensing process by simultaneously handling sample collection and transfer, thus improving efficiency. Moreover, the sampling module includes a vibrator, preferably a high-frequency piezoelectric ceramic resonator or a medium-frequency linear vibrating feeder. This vibrator provides the directional force for the sample to fall, initiating the dispensing action and preventing clumping and dispensing difficulties caused by sample buildup.

[0033] The cleaning module further facilitates the cleaning of the sampling mechanism of the automatic weighing instrument. Unlike traditional weighing instruments, which require separate cleaning of the sampling spoon and the sample receiving device, the cleaning module in this application only needs to clean the sampling mechanism, thus further improving the weighing and sample dispensing efficiency of the automatic weighing instrument. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of an automatic sample weighing instrument according to this utility model;

[0035] Figure 2 This is a schematic diagram of the cleaning module structure of an automatic sample weighing instrument according to this utility model;

[0036] Figure 3 This is a schematic diagram of the sampling mechanism of an automatic weighing instrument according to this utility model;

[0037] Figure 4 This is a flowchart of the weighing and sampling method of the automatic weighing instrument of this utility model.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Lofting module; 11. Receiving component; 12. Sampling port; 13. Positioning component;

[0040] 2. Sampling module; 21. Sampling spoon; 22. Cover plate; 23. Vibrator; 24. Pull rod; 25. Connecting rod; 26. Translation motor; 27. Rotating belt; 28. Rotating motor;

[0041] 3. Sample weighing module; 31. Sample weighing port; 32. Balance mechanism; 33. Weighing pan adjustment mechanism; 34. Sample weighing container;

[0042] 4. Cleaning module; 41. Cleaning brush; 42. Limiting sleeve; 43. Negative pressure port; 44. Hoses;

[0043] 5. Main body; 51. First motion component; 52. Second motion component; 6. Automatic control module. Detailed Implementation

[0044] Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0045] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0047] like Figure 1 As shown, an automatic weighing instrument is used for the automated weighing of coal analysis samples. The instrument includes: a main body 5, a sampling module 1, a sampling module 2, a weighing module 3, and a cleaning module 4. The sampling module 1 and sampling module 2 are movably mounted on the main body 5, while the weighing module 3 and cleaning module 4 are fixedly mounted on the main body 5. The sampling module 1 is used to fix and store the coal analysis sample. The sampling module 2 is used to extract the sample stored in the sampling module 1 and transfer it to the weighing module 3. The sampling module 2 includes a vibrator 23 and an openable sampling mechanism. The vibrator 23 is connected to the sampling mechanism and can vibrate the sample in the sampling mechanism to add it to the weighing module 3. The weighing module 3 is used to weigh the sample. The cleaning module 4 is used to clean the sampling module 2.

[0048] In this embodiment, the automatic weighing instrument, through the closable sampling mechanism in the sampling module 2, allows the sampling module 2 to close promptly after taking the sample from the sample dispensing module 1, preventing splashing and dust pollution during sample transfer. Furthermore, the sampling module 2 eliminates the sample receiving process found in traditional automatic sample dispensing equipment, achieving both sample taking and transfer / dispensing, simplifying the automatic dispensing process and improving efficiency. Moreover, the sampling module 2 includes a vibrator 23, preferably a high-frequency piezoelectric ceramic resonator or a medium-frequency linear vibrating feeder. The vibrator 23 provides directional downward force for the sample, initiating the dispensing action and preventing clumping and dispensing difficulties caused by sample accumulation. The cleaning module 4 further makes the cleaning of the sampling mechanism of the automatic weighing instrument more convenient. Unlike traditional weighing mechanisms, which require separate cleaning of the sampling spoon 21 and the sample receiving device, the cleaning module 4 in this application only needs to clean the sampling mechanism, which further improves the weighing and adding efficiency of the automatic weighing instrument.

[0049] See Figure 2 The sampling mechanism includes a drive assembly and an openable sampling component. The sampling component is connected to the drive assembly to drive its rotation and / or opening and closing. The sampling component includes a sampling spoon 21 and a cover plate 22. The cover plate 22 is movably mounted on the sampling spoon 21. One end of the cover plate 22 is fixedly connected to a pull rod 24, which is rotatably connected to the drive assembly to drive its extension and / or rotation. One end of the sampling spoon 21 is fixedly connected to a connecting rod 25, which is rotatably connected to the drive assembly to drive its rotation. The drive assembly includes a translation motor 26, a rotation motor 28, a rotation belt 27, a drive wheel, and a rotation wheel. The output end of the translation motor 26 is provided with a telescopic rod, which is rotatably connected to the pull rod 24. The output end of the rotation motor 28 is connected to the drive wheel, which is connected to the rotation wheel via the rotation belt 27. The rotation wheels are all fixedly connected to the connecting rod 25 and the pull rod 24.

[0050] In this embodiment, the cover plate 22 of the sampling component is connected to the output end of the translation motor 26 via the pull rod 24. The translation motor 26 realizes the reciprocating motion of the cover plate 22, thereby opening and closing the sampling spoon 21. The sampling spoon 21 and the cover plate 22 are connected to the rotation motor 28 via the connecting rod 25 and the pull rod 24, respectively, thereby realizing the synchronous rotation of the sampling spoon 21, the cover plate 22, the connecting rod 25, and the pull rod 24. This allows the sampling mechanism to simulate the operation of manual sampling, enabling it to both insert into the receiving part 11 of the sample placement module 1 to retrieve the sample and transport it to the weighing port 31 to add the sample by rotating the sampling spoon 21. Furthermore, the vibrator 23 is located below the drive component and connected to the drive component via a mounting plate. The vibrator 23 provides falling power for sample orientation, initiating the sample addition action and avoiding clumping and inconvenience caused by sample accumulation.

[0051] like Figure 1 As shown, the sampling module 1 includes a sampling base, a container 11 for receiving and storing samples, a positioning member 13 for fixing the container 11, and a sampling port 12 for sampling by the sampling module 2. The container 11 is detachably mounted on the sampling base, the positioning member 13 is connected to the sampling base and can abut against the container 11 to position the container 11 with a clamp, and the sampling port 12 is openable and closable at one end of the container 11. The weighing module 3 includes a weighing port 31, a balance mechanism 32, a weighing pan adjustment mechanism 33, and a weighing container 34. The balance mechanism is provided with a fixed weighing port 31, and the weighing containers 34 are all mounted on the balance mechanism 32 and rotate with the rotation of the balance mechanism 32. The balance mechanism 32 is rotatably mounted on the weighing pan adjustment mechanism 33, which is mounted on the main body 5.

[0052] In this embodiment, the placement base and positioning component 13 facilitate the disassembly and assembly of the receiving component 11, making it easy to add and replace samples in the automatic weighing instrument. Furthermore, the openable and closable sampling port 12 prevents sample contamination when the automatic weighing instrument is not in use, ensuring the accuracy of experimental analysis.

[0053] In one embodiment, the weighing container 34 is preferably a crucible. The balance mechanism 32 in the weighing module 3 includes a support rod, a weighing pan, and a weighing rod. The weighing pan has multiple mounting holes for mounting the weighing container 34. The weighing pan is mounted on the support rod, which is rotatably mounted on the main body. The weighing rod is positioned below the weighing pan and corresponds to the mounting holes. The weighing pan adjustment mechanism 33 includes a weighing rotation motor and a weighing lifting motor located below the weighing pan, as well as a mounting plate. The weighing rotation motor is mounted on the mounting plate. One end of the support rod is connected to the output end of the weighing rotation motor to drive the support rod and the weighing pan to rotate. The output end of the weighing lifting motor is connected to the mounting plate to drive the mounting plate to move up and down repeatedly. This causes the weighing pan to move up and down repeatedly via the mounting plate. When the crucible carrying the sample rotates to above the weighing rod, the weighing lifting motor drives the weighing pan to descend until the crucible abuts against the weighing rod, thereby weighing the sample.

[0054] See Figure 3 The cleaning module 4 includes a housing, a cleaning brush 41, a limiting sleeve 42, a negative pressure port 43, and a hose 44. The housing is fixedly mounted on the main body 5. The limiting sleeve 42 is fixedly mounted on one end of the housing. The cleaning brush 41 is mounted on the inner wall of the housing and the limiting sleeve 42 abuts against the limiting cleaning brush 41. The other end of the housing is provided with a negative pressure port 43, which is connected to an air pump through the hose 44 to suck up impurities inside the housing.

[0055] In this embodiment, the cleaning module 4 positions the cleaning brush 41 through the limiting sleeve 42, so that the sampling spoon 21 can be inserted into the cleaning module 4 and the surface of the sampling spoon 21 can be cleaned by the cleaning brush 41. Furthermore, an air pump is connected to the end of the housing of the cleaning module 4, and the air pump creates a negative pressure environment at the negative pressure port 43 of the housing to absorb the coal ash impurities cleaned by the cleaning brush 41.

[0056] In one embodiment, the cleaning module 4 can be disposed on one side of the sampling port 12, and the first motion component 51 and the second motion component 52 enable the cleaning module 4 to clean both the sampling spoon 21 and the sampling port 12.

[0057] like Figure 1As shown, the main body 5 includes a base plate, a first motion component 51, a second motion component 52, and an automatic control module 6. A sampling module 1 is mounted on the first motion component 51 to facilitate sampling by the sampling module 2. The sampling module 2 is mounted on the second motion component 52. Both the first and second motion components 51 and 52 are mounted on the base plate. The sampling module 1, sampling module 2, weighing module 3, and cleaning module 4 are all electrically connected to the automatic control module 6. Both the first and second motion components 51 and 52 include a drive component and a motion rod. The drive component and motion rod are fixedly mounted on the base plate. The motion rod is connected to the drive component to drive the motion rod to reciprocate. The motion rod of the first motion component 51 is inclined at an angle to the axis of the sampling module 1, with the angle being less than 10°. In a preferred embodiment, the automatic control module 6 is a microcontroller, and it can also be a PLC control module.

[0058] Based on the aforementioned automatic sample weighing instrument, this utility model also provides a method for using the automatic sample weighing instrument, such as... Figure 4 As shown, its usage includes:

[0059] S1. Coal sample taking: The sampling module 1 moves to a position close to the sampling module 2 via the first motion component 51, opens the sampling port 12, and the sampling spoon 21 of the sampling module 2 moves to contact the sample in the container 11 of the sampling module 1 via the second motion component 52, and takes a coal sample from the sampling module 1.

[0060] S2, Sampling port 12 disengages: After the sampling spoon 21 rotates and takes a sample in the receiving part 11 of the sampling module 1, the first motion component 51 drives the sampling module 1 to move away from the sampling module 2, the sampling spoon 21 disengages from the receiving part 11, and the cover plate 22 moves to close the sampling spoon 21.

[0061] S3, weighing container 34 corresponds to weighing port 31: when balance mechanism 32 rotates, weighing container 34 set on balance mechanism 32 rotates to weighing port 31;

[0062] S4. Coal sample is transferred to weighing port 31: The second motion component 52 drives the sampling module 2 to move until the sampling spoon 21 is located at the weighing port 31;

[0063] S5. Coal sample addition: The cover plate 22 is opened under the action of the pull rod 24, and the sampling spoon 21 is rotated so that the opening faces the weighing container 34. At this time, the vibrator 23 is started, and the sampling spoon 21 is vibrated so that the sample falls into the weighing container 34.

[0064] S6. Determine whether the sample addition in the weighing container 34 has been completed according to the balance mechanism 32. If the sample addition is completed, proceed to step S7. If the sample addition is not completed, repeat steps S1-S6 until the sample addition is completed.

[0065] S7. Sampling head cleaning: After the sample addition is completed, the sampling spoon 21 moves to the cleaning module 4 along with the second motion component 52 to clean the remaining sample.

[0066] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An automatic weighing instrument, wherein the automatic weighing instrument is used for the automated weighing of coal analysis samples, characterized in that, The automatic sample weighing device includes: a main body, a sample placement module, a sample taking module, a sample weighing module, and a cleaning module; Both the sampling module and the weighing module are movably mounted on the main body, while both the weighing module and the cleaning module are fixedly mounted on the main body. The sampling module is used to fix and store samples for coal analysis; The sampling module is used to extract the sample stored in the sampling module and transfer the sample to the weighing module. The sampling module includes a vibrator and an openable sampling mechanism. The vibrator is connected to the sampling mechanism and can vibrate the sample in the sampling mechanism to add the sample to the weighing module. The weighing module is used to weigh the sample; The cleaning module is used to clean the sampling module.

2. The automatic sample weighing instrument according to claim 1, characterized in that, The sampling mechanism includes a drive component and an openable sampling component; The sampling component is connected to the driving component to drive the rotation and / or opening and closing of the sampling component.

3. The automatic sample weighing instrument according to claim 2, characterized in that, The sampling assembly includes a sampling spoon and a cover plate; The cover plate is movably mounted on the sampling spoon. One end of the cover plate is fixedly connected to a pull rod, which is rotatably connected to the drive assembly to drive the extension and / or rotation of the pull rod. One end of the sampling spoon is fixedly connected to a connecting rod, which is rotatably connected to the drive assembly to drive the rotation of the connecting rod.

4. The automatic sample weighing instrument according to claim 3, characterized in that, The drive assembly includes a translation motor, a rotation motor, a rotation belt, a drive pulley, and a rotation pulley; The output end of the translation motor is provided with a telescopic rod, which is rotatably connected to the pull rod. The output end of the rotation motor is connected to the drive wheel, and the drive wheel is connected to the rotation wheel through the rotation belt. The rotation wheel is fixedly connected to the connecting rod and the pull rod.

5. The automatic sample weighing instrument according to any one of claims 1-4, characterized in that, The sampling module includes a sampling base, a container for receiving and storing samples, a positioning component for fixing the container, and a sampling port for the sampling module to take samples. The receiving component is detachably mounted on the laying-out base. The positioning component is connected to the laying-out base and can abut against the receiving component to clamp and position the receiving component. The sampling port is openable and closable at one end of the receiving component.

6. The automatic sample weighing instrument according to any one of claims 1-4, characterized in that, The weighing module includes a weighing port, a balance mechanism, a weighing pan adjustment mechanism, and a weighing container; The balance mechanism is provided with a fixed weighing port, and the weighing containers are all provided on the balance mechanism and rotate with the rotation of the balance mechanism. The balance mechanism is rotatably provided on the weighing pan adjustment mechanism, and the weighing pan adjustment mechanism is provided on the main body.

7. The automatic sample weighing instrument according to any one of claims 1-4, characterized in that, The cleaning module includes a housing, a cleaning brush, a limiting sleeve, a negative pressure port, and a hose. The housing is fixedly mounted on the main body, the limiting sleeve is fixedly mounted on one end of the housing, the cleaning brush is mounted on the inner wall of the housing and the limiting sleeve abuts against and limits the cleaning brush, and the other end of the housing is provided with the negative pressure port, which is connected to an air pump through the hose to suck up impurities inside the housing.

8. The automatic sample weighing instrument according to any one of claims 1-4, characterized in that, The main body includes a base plate, a first motion component, a second motion component, and an automatic control module; The lofting module is disposed on the first motion component to facilitate sampling by the sampling module, the sampling module is disposed on the second motion component, and both the first motion component and the second motion component are disposed on the base plate; The sampling module, weighing module, and cleaning module are all electrically connected to the automatic control module.

9. The automatic sample weighing instrument according to claim 8, characterized in that, Both the first motion component and the second motion component include a drive element and a motion rod; Both the driving component and the moving rod are fixedly mounted on the base plate. The moving rod is connected to the driving component to drive the moving rod to reciprocate. The moving rod of the first moving component is set at an inclined angle to the axis of the lofting module, and the angle of the inclined angle is less than 10°.

Images