Automatic sample weighing instrument and weighing and sampling method thereof

Abstract

The invention 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] The present invention relates to the technical field of sample detection, and more particularly to an automatic sample weighing instrument and a weighing and sampling method thereof. Background Art

[0002] In the field of coal analysis, calorific value analysis, industrial analysis, and elemental analysis are often required. These numerous analytical parameters all require weighing a specified mass of coal sample. Conventional weighing is typically done manually. The typical procedure involves first placing an empty crucible to be tested on a scale and taring it. Then, using a handheld sampling spoon, scoop the sample from the coal container several times, shaking it over the crucible to achieve the target mass.

[0003] In recent years, the weighing of coal analysis samples has become automated. A robotic arm grips a sampling spoon, takes a spoonful of coal sample from a flask, and pours it into a sample receiving device. The sampling device, based on feedback from a scale, dispenses the required mass of coal sample into a crucible. Both the sampling spoon and the sample receiving device are then cleaned separately.

[0004] In the field of coal quality weighing, it is generally necessary to weigh the sample mass before analysis. According to national standards, the mass range of coal analysis samples is wide and the weighing error is small. During the weighing process, there are micro-weighings within 100mg, as well as weighings of 1000mg, and even some weighings have an accuracy of ±5mg. In manual weighing, since the sample is coal powder, the weighing mass range is wide, and the crucible itself is small, it is easy to leave residue and fly during operation, causing weighing errors and contamination. In addition, most of the existing automated sample adding and weighing equipment grabs the sample in a specific sample bottle and transfers it to the crucible for sampling. During the sampling and transfer process, there is a problem of sample leakage. During use, the coal ash is easily compressed due to vibration, which often makes it inconvenient to add samples. After use, the equipment is prone to serious dirt and difficult to clean.

[0005] Therefore, how to improve the sample adding efficiency of sample adding and weighing equipment, avoid coal ash splashing, and facilitate cleaning after use is a problem that needs to be solved urgently. Summary of the Invention

[0006] The purpose of the present invention is to provide an automatic sample weighing instrument and a weighing sampling method thereof. The automatic sample weighing instrument provided by the present invention can effectively improve the sampling efficiency of the sample weighing device, avoid the splashing of coal ash, and facilitate cleaning after use.

[0007] To achieve the above object, the technical solution of the present invention is as follows:

[0008] An automatic sample weighing instrument is used for automatically weighing coal analysis samples, and the automatic sample weighing instrument comprises: a main body, a sample placement module, a sampling module, a sample weighing module and a cleaning module;

[0009] The sample placement 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;

[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 sample placement module and transfer the sample to the sample weighing module. The sampling module includes a vibrator and an openable and closable 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 sample weighing module.

[0012] The sample 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 and 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 comprises a sampling spoon and a cover plate;

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

[0018] Preferably, the driving assembly includes a translation motor, a rotation motor, a rotation belt, a driving wheel, and a rotating wheel;

[0019] The output end of the translation motor is provided with a retractable telescopic rod, the telescopic rod is rotatably connected to the pull rod, the output end of the rotating motor is connected to the driving wheel, the driving wheel is connected to the rotating wheel through the rotating belt, and the rotating wheels are 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 container is detachably arranged on the lofting base, the positioning member is connected to the lofting base and can abut against the container to position the container with a clamp, and the sampling port is openably arranged at one end of the container.

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

[0023] The balance mechanism is provided with a fixed weighing port, the sample 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.

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

[0025] The shell is fixedly arranged on the main body, the limiting sleeve is fixedly arranged at one end of the shell, the cleaning brush is arranged on the inner wall of the shell and the limiting sleeve abuts against and limits the cleaning brush, and the other end of the shell is provided with the negative pressure port, and the negative pressure port is connected to the air pump through the hose to suck impurities in the shell.

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

[0027] The sampler module is arranged on the first motion component to facilitate the sampling of the sampling module, the sampling module is arranged on the second motion component, and the first motion component and the second motion component are both arranged on the bottom plate;

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

[0029] Preferably, the first motion assembly and the second motion assembly each include a driving member and a motion rod;

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

[0031] The present invention also provides a weighing and sampling method for an automatic sample weighing instrument, wherein the weighing and sampling method is implemented based on the above-mentioned automatic sample weighing instrument, and the weighing and sampling method comprises:

[0032] S1. Coal sampling: The sampling spoon of the sampling module takes the coal sample in the sampling module;

[0033] S2. Sampling port disengagement: After the sampling spoon rotates in the receiving part of the sampling module to take a sample, the first motion assembly drives the sampling module to move toward a side away from the sampling module, the sampling spoon disengages from the receiving part, and the cover moves to seal the sampling spoon;

[0034] S3. The sample container corresponds to the weighing port: the balance mechanism rotates, and the sample container set on the balance mechanism rotates to the weighing port;

[0035] S4, transporting the coal sample to the weighing port: the second motion component drives the sampling module to move until the sampling spoon is located at the weighing port;

[0036] S5. Adding coal sample: the cover is opened by the pull rod, and the sampling spoon is rotated until the opening faces the sample weighing container. At this time, the vibrator is started to vibrate the sampling spoon to make the sample fall into the sample weighing container;

[0037] S6, judging whether the sample addition in the sample container has been completed according to the balance mechanism, if the sample addition is completed, proceeding to step S7, if the sample addition is not completed, repeating steps S1-S6 until the sample addition is completed;

[0038] S7. Cleaning the sampling head: After the sample addition is completed, the sampling spoon moves to the cleaning module along with the second moving component to clean the residual sample.

[0039] The beneficial effects of the present invention are:

[0040] The automatic sample weighing instrument is provided with an openable and closable sampling mechanism in the sampling module, so that the sampling module of the automatic sample weighing instrument can close the sampling mechanism in time after taking the sample in the sample placement module, thereby avoiding splashing during the sample transportation process and avoiding dust pollution during the transportation process. In addition, the automatic sample weighing instrument eliminates the sample receiving process in the traditional automatic sampling equipment through the setting of the sampling module. The sampling module not only realizes the taking of samples, but also realizes the transportation and sampling of samples, simplifies the automatic sampling process, and improves the sampling efficiency. Furthermore, an exciter is provided in the sampling module, and the exciter is preferably a high-frequency piezoelectric ceramic resonator or a medium-frequency linear vibration feeder. The exciter can provide a falling force for the sample in a directional manner and start the sampling action, thereby avoiding the agglomeration and inconvenience of sampling caused by sample accumulation.

[0041] The setting of the cleaning module further makes the cleaning of the sampling mechanism of the automatic sample weighing instrument more convenient. There is no need to clean the sampling spoon and the sample receiving device separately as in traditional sample weighing mechanisms. The cleaning module in this application only needs to clean the sampling mechanism, further improving the sampling and adding efficiency of the automatic sample weighing instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1This is a schematic diagram of the overall structure of an automatic sample weighing instrument of the present invention;

[0043] Figure 2 This is a schematic structural diagram of a cleaning module of an automatic sample weighing instrument of the present invention;

[0044] Figure 3 This is a schematic structural diagram of a sampling mechanism of an automatic sample weighing instrument of the present invention;

[0045] Figure 4 The present invention is a flow chart of the weighing and sampling method of the automatic sample weighing instrument.

[0046] Description of reference numerals:

[0047] 1. Lofting module; 11. Receiving part; 12. Sampling port; 13. Positioning part;

[0048] 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;

[0049] 3. Sample weighing module; 31. Weighing port; 32. Balance mechanism; 33. Weighing pan adjustment mechanism; 34. Sample weighing container;

[0050] 4. Cleaning module; 41. Cleaning brush; 42. Limit sleeve; 43. Negative pressure port; 44. Hose;

[0051] 5. Main body; 51. First motion component; 52. Second motion component; 6. Automatic control module. DETAILED DESCRIPTION

[0052] The following description sets forth numerous specific details to facilitate a thorough understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific implementations disclosed below.

[0053] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0055] like Figure 1 As shown, an automatic sample weighing instrument is used for automatic weighing of coal analysis samples, and the automatic sample weighing instrument includes: a main body 5, a sampling module 1, a sampling module 2, a sampling module 3 and a cleaning module 4; the sampling module 1 and the sampling module 2 can be movably arranged on the main body 5, and the sampling module 3 and the cleaning module 4 are fixedly arranged on the main body 5; the sampling module 1 is used to fix and store samples for coal analysis; the sampling module 2 is used to extract samples stored in the sampling module 1 and transfer the samples to the sampling module 3, the sampling module 2 includes a vibrator 23 and an openable and closable sampling mechanism, the vibrator 23 is connected to the sampling mechanism, and the vibrator 23 can vibrate the sample in the sampling mechanism to add the sample to the sampling module 3; the sampling module 3 is used to weigh the weight of the sample; the cleaning module 4 is used to clean the sampling module 2.

[0056] In this embodiment, the automatic sample weighing instrument is provided with an openable and closable sampling mechanism in the sampling module 2 so that the sampling module 2 of the automatic sample weighing instrument can close the sampling mechanism in time after taking the sample in the sample placement module 1, thereby avoiding splashing during the sample transportation process and avoiding dust pollution during the transportation process. In addition, the automatic sample weighing instrument eliminates the sample receiving process in the traditional automatic sampling equipment through the provision of the sampling module 2. The sampling module 2 not only realizes the taking of the sample, but also realizes the transportation and sampling of the sample, simplifies the automatic sampling process, and improves the sampling efficiency. Furthermore, an exciter 23 is provided in the sampling module 2, and the exciter 23 is preferably a high-frequency piezoelectric ceramic resonator or a medium-frequency linear vibration feeder. The exciter 23 can provide a falling force for the sample in a directional manner, start the sampling action, and avoid the situation of agglomeration and inconvenience of sampling caused by sample accumulation. The setting of the cleaning module 4 further facilitates the cleaning of the sampling mechanism of the automatic sample weighing instrument. There is no need to clean the sampling spoon 21 and the sample receiving device separately as in traditional sample weighing mechanisms. The cleaning module 4 in this application only needs to clean the sampling mechanism, further improving the sampling and adding efficiency of the automatic sample weighing instrument.

[0057] See also Figure 2The sampling mechanism includes a drive assembly and an openable and closable sampling assembly; the sampling assembly is connected to the drive assembly to drive the rotation and / or opening and closing of the sampling assembly. The sampling assembly includes a sampling spoon 21 and a cover plate 22; the cover plate 22 is movably arranged on the sampling spoon 21, and 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 the extension and / or rotation of the pull rod 24. 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 the rotation of the connecting rod 25. The driving assembly includes a translation motor 26, a rotation motor 28, a rotating belt 27, a driving wheel, and a rotating wheel; the output end of the translation motor 26 is provided with a retractable telescopic rod, which is rotatably connected to the pull rod 24, the output end of the rotating motor 28 is connected to the driving wheel, and the driving wheel is connected to the rotating wheel via a rotating belt 27, and the rotating wheels are both fixedly connected to the connecting rod 25 and the pull rod 24.

[0058] In this embodiment, the sampling assembly's cover plate 22 is connected to the output of a translation motor 26 via a pull rod 24. The translation motor 26 drives the reciprocating motion of the cover plate 22, thereby opening and closing the sampling spoon 21. The sampling spoon 21 and cover plate 22 are connected to a rotary motor 28 via a connecting rod 25 and a pull rod 24, respectively, enabling the synchronous rotation of the sampling spoon 21, cover plate 22, connecting rod 25, and pull rod 24. This allows the sampling mechanism to simulate manual sampling, allowing it to both reach into the receptacle 11 of the sample placement module 1 to retrieve the sample and transfer it to the weighing port 31 to load the sample by rotating the sampling spoon 21. Furthermore, a vibrator 23 is located below the drive assembly and connected to the drive assembly via a mounting plate. The vibrator 23 provides downward force to orient the sample, enabling loading to begin, thus preventing sample accumulation and the resulting clumping and inconvenience of loading.

[0059] like Figure 1 As shown, the sample placement module 1 includes a sample placement 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 sample placement base, the positioning member 13 is connected to the sample placement base and can abut against the container 11 to position the container 11 with a clamp, and the sampling port 12 is openably mounted at one end of the container 11. The sample weighing module 3 includes a weighing port 31, a balance mechanism 32, a weighing pan adjustment mechanism 33, and a sample weighing container 34. The balance mechanism is provided with a fixed weighing port 31, and the sample weighing container 34 is provided on the balance mechanism 32 and rotates with the rotation of the balance mechanism 32. The balance mechanism 32 is rotatably mounted on the weighing pan adjustment mechanism 33, and the weighing pan adjustment mechanism 33 is mounted on the main body 5.

[0060] In this embodiment, the arrangement of the sample placement base and the positioning member 13 facilitates the disassembly and assembly of the container 11, and facilitates the addition and replacement of samples in the automatic sample weighing instrument. The sampling port 12 that can be opened and closed avoids contamination of samples when the automatic sample weighing instrument is not in use, thereby ensuring the accuracy of experimental analysis.

[0061] In one embodiment, its sample container 34 is preferably a crucible. And the balance mechanism 32 in the sample weighing module 3 includes a support rod, a weighing pan and a weighing rod, and a plurality of mounting holes for installing the sample container 34 are provided on its weighing pan, and its weighing pan is arranged on the support rod, and the support rod is rotatably arranged on the main body, and the weighing rod is arranged below the weighing pan and corresponds to the mounting hole. The weighing pan adjustment mechanism 33 includes a weighing rotating motor and a weighing lifting motor and a mounting plate arranged below the weighing pan, and the weighing rotating motor is arranged on the mounting plate, one end of the support rod is connected to the output end of the weighing rotating motor to drive the support rod and the weighing pan to rotate, and the output end of the weighing lifting motor is connected to the mounting plate to drive the mounting plate to lift and reciprocate up and down, thereby driving the weighing pan to lift and reciprocate by the mounting plate, and when the crucible carrying the sample rotates 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 weight.

[0062] See also Figure 3 The cleaning module 4 includes a shell, a cleaning brush 41, a limiting sleeve 42, a negative pressure port 43 and a hose 44; the shell is fixedly arranged on the main body 5, the limiting sleeve 42 is fixedly arranged at one end of the shell, the cleaning brush 41 is arranged on the inner wall of the shell and the limiting sleeve 42 abuts against the limiting cleaning brush 41, and a negative pressure port 43 is provided at the other end of the shell. The negative pressure port 43 is connected to the air pump through a hose 44 to suck impurities in the shell.

[0063] In this embodiment, the cleaning module 4 positions the cleaning brush 41 through the limiting sleeve 42, so that the sampling spoon 21 is inserted into the cleaning module 4 and the surface of the sampling spoon 21 can be cleaned by the cleaning brush 41, and an air pump is connected to the end of the shell of the cleaning module 4, and the air pump forms a negative pressure environment at the negative pressure port 43 of the shell to absorb the coal ash impurities cleaned by the cleaning brush 41.

[0064] In one embodiment, the cleaning module 4 can be disposed on one side of the sampling port 12 , and the cleaning module 4 can clean both the sampling spoon 21 and the sampling port 12 through the first motion component 51 and the second motion component 52 .

[0065] like Figure 1As shown, the main body 5 includes a base plate, a first motion component 51 and a second motion component 52, and an automatic control module 6; the layout module 1 is arranged on the first motion component 51 to facilitate sampling by the sampling module 2, and the sampling module 2 is arranged on the second motion component 52. The first motion component 51 and the second motion component 52 are both arranged on the base plate; the layout module 1, the sampling module 2, the sample weighing module 3 and the cleaning module 4 are all electrically connected to the automatic control module 6. The first motion component 51 and the second motion component 52 each include a driving member and a moving rod; the driving member and the moving rod are both fixedly arranged on the base plate, and the moving rod is connected to the driving member to drive the moving rod to reciprocate. The moving rod of the first motion component 51 is arranged at an inclined angle with the axis of the layout module 1, and the angle of the inclined angle is less than 10°. In a preferred embodiment, the automatic control module 6 is a single-chip microcomputer, and the automatic control module 6 can also be a PLC control module.

[0066] The present invention also provides a weighing and sampling method for an automatic sample weighing instrument, which is implemented based on the above-mentioned automatic sample weighing instrument. Figure 4 As shown, the gravimetric sampling method includes:

[0067] S1. Coal sampling: The sampling module 1 moves to a position close to the sampling module 2 via the first motion assembly 51, and the sampling port 12 is opened. The sampling spoon 21 of the sampling module 2 moves to contact the sample in the receiving part 11 of the sampling module 1 via the second motion assembly 52, and the coal sample is taken from the sampling module 1;

[0068] S2. Sampling port 12 disengages: After the sampling spoon 21 rotates in the receiving member 11 of the sampler module 1 to collect samples, the first motion assembly 51 drives the sampler module 1 to move toward a side away from the sampling module 2. The sampling spoon 21 disengages from the receiving member 11, and the cover 22 moves to seal the sampling spoon 21.

[0069] S3, the sample container 34 corresponds to the weighing port 31: the balance mechanism 32 rotates, and the sample container 34 set on the balance mechanism 32 rotates to the weighing port 31;

[0070] S4, the coal sample is transferred to the 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;

[0071] S5. Adding coal sample: The cover 22 is opened by the pull rod 24, and the sampling spoon 21 is rotated until the opening faces the sample weighing container 34. At this time, the vibrator 23 is started to vibrate the sampling spoon 21 to make the sample fall into the sample weighing container 34;

[0072] S6, judging whether the sample loading in the weighing container 34 has been completed according to the balance mechanism 32, if the sample loading is completed, proceeding to step S7, if the sample loading is not completed, repeating steps S1-S6 until the sample loading is completed;

[0073] S7, cleaning of the sampling head: After the sample addition is completed, the sampling spoon 21 moves to the cleaning module 4 along with the second moving component 52 to clean the residual sample.

[0074] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, 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.

[0075] The above embodiments merely illustrate several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. An automatic sample weighing instrument, which is used for automatic weighing of coal analysis samples, characterized in that: The automatic sample weighing instrument comprises: a main body, a sample placing module, a sampling module, a sample weighing module and a cleaning module; The sample placement 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 sampling module is used to fix and store samples for coal analysis; The sampling module is used to extract the sample stored in the sample placement module and transfer the sample to the sample weighing module. The sampling module includes a vibrator and an openable sampling mechanism. The vibrator is connected to the sampling mechanism. The vibrator can vibrate the sample in the sampling mechanism to add the sample to the sample weighing module. The sample 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 comprises a driving component and an openable and closable 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 arranged on the sampling spoon, one end of the cover plate is fixedly connected with a pull rod, the pull rod is rotatably connected with the driving assembly to drive the extension and / or rotation of the pull rod, and one end of the sampling spoon is fixedly connected with a connecting rod, the connecting rod is rotatably connected with the driving assembly to drive the rotation of the connecting rod.

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

5. The automatic sample weighing instrument according to any one of claims 1 to 4, characterized in that: The sample placing module comprises a sample placing base, a container for receiving and storing samples, a positioning member for fixing the container, and a sampling port for sampling by the sampling module; The container is detachably arranged on the sample base, the positioning member is connected to the sample base and can abut against the container to position the container by a clamp, and the sampling port is openably arranged at one end of the container.

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

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

8. The automatic sample weighing instrument according to any one of claims 1 to 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 sample placement module is arranged on the first motion component to facilitate the sampling of the sampling module, the sampling module is arranged on the second motion component, and the first motion component and the second motion component are both arranged on the bottom plate; The sample placement module, sampling module, sample weighing module and cleaning module are all electrically connected to the automatic control module.

9. The automatic sample weighing instrument according to any one of claims 1 to 4, characterized in that: The first motion assembly and the second motion assembly each include a driving member and a motion rod; The driving member and the moving rod are both fixedly arranged on the base plate, the moving rod is connected to the driving member to drive the moving rod to reciprocate, the moving rod of the first moving assembly is arranged at an inclined angle with the axis of the lofting module, and the angle of the inclined angle is less than 10°.

10. A weighing and sampling method for an automatic weighing instrument, characterized in that: The weighing and sampling method is implemented based on the automatic sample weighing instrument according to any one of claims 1 to 9, and the weighing and sampling method comprises: S1. Coal sampling: The sampling spoon of the sampling module takes the coal sample in the sampling module; S2, the sampling port is separated: after the sampling spoon rotates in the receiving part of the sampling module to take samples, the first motion component drives the sampling module to move toward a side away from the sampling module, the sampling spoon is separated from the receiving part, and the cover plate moves to close the sampling spoon; S3, the sample weighing container corresponds to the weighing port: the balance mechanism rotates, and the sample weighing container arranged on the balance mechanism rotates to the weighing port; S4, coal sample is transferred to the weighing port: the second motion component drives the sampling module to move until the sampling spoon is located at the weighing port; S5, adding coal sample: the cover plate is opened under the action of the pull rod, and the sampling spoon is rotated until the opening faces the sample weighing container. At this time, the vibrator is started to vibrate the sampling spoon to make the sample fall into the sample weighing container; S6, judging whether the sample addition in the sample weighing container has been completed according to the balance mechanism, if the sample addition is completed, proceeding to step S7, if the sample addition is not completed, repeating steps S1-S6 until the sample addition is completed; S7, cleaning of sampling head: after the sample addition is completed, the sampling spoon moves to the cleaning module along with the second moving component to clean the residual sample.

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