Sample collection cassette automatic replacement mechanism of automatic sampler

Abstract

The application relates to the technical field of building material detection, and discloses a sample collection box automatic replacement mechanism of an automatic sampling machine, which comprises a machine box, a supporting shaft rotatably arranged in the machine box, a driving mechanism arranged at the bottom of the supporting shaft and used for driving the rotation of the supporting shaft, a counting monitoring mechanism arranged on one side of the machine box and in transmission connection with the supporting shaft, a digital counter fixedly arranged at the top of one side of the machine box, an alarm fixedly arranged at the top end of the digital counter, and a material collecting box fixedly arranged at the top end of the machine box. The motor is controlled to rotate once every preset time interval, the supporting shaft and the material loading table are automatically driven to rotate one station, the automatic replacement of the material collecting box is realized, manual intervention is not needed, the labor intensity is greatly reduced, the worm and gear transmission is adopted as the driving mechanism, the high-precision and high-efficiency rotation of the supporting shaft is realized by using the characteristics of the worm and gear transmission, such as large transmission ratio, compact structure and stable operation.

Description

Technical Field

[0001] This invention relates to the field of building material testing technology, specifically to an automatic sample collection box replacement mechanism for an automatic sampling machine. Background Technology

[0002] In the production process of sand and gravel aggregates, it is crucial to regularly sample and test the moisture content, particle size distribution, and mud content of the finished sand and gravel to ensure the quality of concrete. As sand and gravel plants develop towards intelligence and unmanned operation, automatic sampling machines have gradually replaced traditional manual sampling. However, existing automatic sampling machines still have significant shortcomings in the sample collection process.

[0003] Currently, most sand and gravel plants still use manual timed replacement of collection boxes. This means that testers go to the head of the conveyor belt every so often to manually remove the collection boxes that are full of samples and replace them with empty ones. This method is labor-intensive, especially during nighttime operations, and fatigue can easily lead to untimely replacements or incorrect sample numbering. Some automation upgrades use ordinary electric motors to drive a turntable for box replacement, but they lack the ability to detect whether the turntable is in position. This can easily result in samples falling into the gap between two collection boxes or being poured into a full box. In addition, existing equipment generally does not have a sample collection count function, and operators cannot remotely know the sample collection status of each collection box, leading to frequent problems such as sample overflow and sample mixing, which seriously affects the representativeness of the test data.

[0004] Therefore, there is an urgent need for an automatic sample collection box replacement device with precise box changing, counting, and alarm functions to adapt to the actual working conditions of continuous production in sand and gravel plants. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an automatic sample collection box replacement mechanism for an automatic sampling machine, which integrates the advantages of precise box replacement, counting, and alarm functions, thus solving the problems mentioned in the background technology.

[0006] The present invention provides the following technical solution: an automatic sample collection box replacement mechanism for an automatic sampling machine, comprising a chassis, a support shaft rotatably disposed inside the chassis, a drive mechanism for driving the support shaft to rotate at its bottom, a counting and monitoring mechanism connected to the support shaft on one side of the chassis, a digital display counter fixedly mounted on the top of one side of the chassis, an alarm fixedly mounted on the top of the digital display counter, a collection box fixedly mounted on the top of the chassis, a material loading platform connected to the support shaft inside the collection box, and a support mechanism between the material loading platform and the support shaft, multiple material collection boxes mounted on the surface of the material loading platform, a guide cylinder fixedly mounted on one side of the top of the collection box, and a conical hopper detachably mounted on the top of the guide cylinder.

[0007] As a preferred embodiment of the present invention, the drive mechanism includes a support frame, a motor, and a coupling. The bottom end of the support frame is fixedly connected to the inner wall of the bottom end of the housing. A support frame is fixedly provided at the top end of the support frame. A worm gear is rotatably connected to one side of the support frame via a bearing. The worm gear is meshed with a worm wheel, which is interference-fitted with the support shaft. The bottom of the support shaft is rotatably connected to the support frame via a bearing. The motor is fixedly connected to one side of the top end of the support frame. The output shaft of the motor is fixedly connected to one end of the worm gear via a coupling.

[0008] As a preferred embodiment of the present invention, the counting monitoring mechanism includes an adjustable shaft frame and a synchronous shaft. Bearings for supporting the synchronous shaft are installed at the top and bottom of the adjustable shaft frame. A dividing plate is fixedly installed at the top of the synchronous shaft, and multiple counting stops are provided on the dividing plate. The counting stops are equidistantly distributed along the circumference of the dividing plate, and the number of counting stops is the same as the number of material collection boxes. A first synchronous wheel is installed at the bottom of the synchronous shaft, and a second synchronous wheel corresponding to the first synchronous wheel is provided at the bottom of the supporting shaft. A synchronous belt for transmission is wound between the first and second synchronous wheels. A protruding plate is fixedly installed on one side of the adjustable shaft frame, and a counting sensor corresponding to the counting stops is fixedly installed on the surface of the protruding plate. The counting sensor and the alarm are both electrically connected to a digital display counter.

[0009] As a preferred embodiment of the present invention, one side of the adjustable shaft frame is provided with an adjustment component for adjusting its position. The adjustment component includes a vertical plate, which is embedded in one side of the chassis. The top and bottom of the vertical plate are provided with rod grooves, and a positioning screw is slidably disposed in the rod groove. One end of the positioning screw is fixedly connected to the adjustable shaft frame. The top and bottom of both sides of the vertical plate are provided with adjusting nuts that are threadedly connected to the positioning screw, and a wedge-shaped washer for preventing loosening is provided between the adjusting nut and the vertical plate.

[0010] As a preferred embodiment of the present invention, the support mechanism includes a turntable, the top of which is provided with multiple slots, the bottom of which is fixedly provided with a locking block that engages with the corresponding slots, the top of which is fixedly provided with a tray, the top of which is fixedly connected to the middle of the bottom of the turntable by screws, the bottom of which is fixedly provided with a retaining ring, the outer diameter of which is equal to the diameter of the turntable, and the bottom of which is fixedly provided with a rubber dustproof ring to prevent dust from entering, and the bottom of which is fixedly provided with a reinforcing washer coaxial with the retaining ring, the outer diameter of which is smaller than the inner diameter of the retaining ring, and the bottom of which is rotatably provided with a plurality of balls that are slidably connected to the chassis.

[0011] As a preferred embodiment of the present invention, the front of the chassis is provided with an inspection port, and a cover plate is fixedly installed on one side of the inspection port by screws. The front of the collection box is provided with a material receiving port, and a cover plate is hinged to one side of the material receiving port by a hinge. Buckles are installed on the top and bottom of one side of the cover plate. A card seat that engages with the buckles is fixedly provided on the top and bottom of one side of the collection box.

[0012] As a preferred embodiment of the present invention, a support ring is fixedly provided at the top of the guide cylinder, and an installation ring is fixedly provided at the top of the conical hopper. The bottom end of the installation ring is fixedly connected to the top end of the support ring by bolts, and handles are fixedly provided on both sides of the installation ring. A damping rubber pad for reducing material impact is provided between the installation ring and the support ring. A guide plate for guiding the sand and gravel sample is fixedly provided on the inner wall of the guide cylinder. A sand and gravel conduit one for feeding the guide plate is fixedly connected to the middle of the bottom end of the conical hopper. A sand and gravel conduit two corresponding to the material collection box is fixedly provided at the bottom end of the guide plate.

[0013] As a preferred embodiment of the present invention, the surface of the material carrier platform is provided with a placement position corresponding to the material collection box, the bottom of the material collection box is engaged with the interior of the placement position, and both one side of the placement position and one side of the material collection box are provided with a label to mark their sequence.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The automatic sample collection box replacement mechanism of this automatic sampling machine controls the motor to rotate once every preset time, driving the support shaft and the material platform to automatically rotate one station, realizing the timed automatic replacement of the material collection box without manual intervention, which greatly reduces labor intensity. The worm gear transmission is used as the drive mechanism, which utilizes its large transmission ratio, compact structure and stable operation to achieve high precision and high efficiency rotation of the support shaft. At the same time, the self-locking performance of the worm gear ensures that the material collection box can reliably maintain its position after the motor stops, preventing displacement due to external force or vibration.

[0016] 2. The automatic sample collection box replacement mechanism of this automatic sampler uses a synchronous belt and synchronous pulley to form a precise synchronous transmission system. Utilizing the toothed meshing characteristic of the synchronous belt with no relative slippage, it ensures that the counting stop bar on the indexing plate and the material collection box on the loading platform maintain a strict one-to-one synchronous rotation, resulting in high transmission efficiency. When the number of box replacements recorded by the digital counter reaches the total number of material collection boxes, the control unit of the digital counter can trigger an alarm to remind the operator that all collection boxes are full and need sampling or replacement. Furthermore, the counting monitoring mechanism can be quickly installed and disassembled, and the synchronous belt tension can be adjusted via an adjustment component. The slots, blocks, dustproof rings, and ball bearings in the support mechanism improve rotational smoothness and sealing. The counting monitoring mechanism is located on one side of the chassis, ensuring sufficient space for installation and monitoring, and facilitating maintenance and debugging. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0019] Figure 3 This is a schematic diagram of the internal structure of the chassis of the present invention;

[0020] Figure 4 This is a schematic diagram of the drive mechanism of the present invention;

[0021] Figure 5 This is a schematic diagram of the monitoring mechanism of the present invention;

[0022] Figure 6 This is a schematic diagram of the conical hopper of the present invention;

[0023] Figure 7 This is a schematic diagram of the material carrier platform of the present invention;

[0024] Figure 8 This is a schematic diagram of the support mechanism of the present invention.

[0025] In the diagram: 1. Chassis; 2. Support shaft; 3. Drive mechanism; 301. Bearing frame; 302. Support frame; 303. Worm gear; 304. Worm wheel; 305. Motor; 306. Coupling; 4. Counting and monitoring mechanism; 401. Adjustable shaft frame; 402. Synchronous shaft; 403. Counting stop bar; 404. Synchronous pulley one; 405. Protruding plate; 406. Counting sensor; 407. Vertical plate; 408. Positioning screw; 409. Adjusting nut; 5. Synchronous belt; 6. Digital display counter; 7. Alarm; 8. Collection box; 9. Loading platform; 10. Cover plate one; 11. Guide cylinder; 12. Support mechanism; 1201. Turntable; 1202. Slot; 1203. Retaining ring; 1204. Rubber dustproof ring; 1205. Reinforcing washer; 1206. Ball bearing; 13. Cover plate two; 14. Buckle; 15. Synchronous pulley two; 16. Placement position; 17. Material collection box; 18. Locking block; 19. Pallet; 20. Conical hopper; 21. Support ring; 22. Mounting ring; 23. Damping rubber pad; 24. Handle; 25. Sand and gravel guide pipe one; 26. Guide plate; 27. Sand and gravel guide pipe two. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figures 1-8 The automatic sample collection box replacement mechanism of the automatic sampler includes a housing 1. A support shaft 2 is rotatably installed inside the housing 1. A drive mechanism 3 is provided at the bottom of the support shaft 2 to drive the support shaft 2 to rotate intermittently at a preset angle and has a self-locking function. A counting and monitoring mechanism 4 is provided on one side of the housing 1 and is connected to the support shaft 2. A digital display counter 6 is fixedly installed on the top of one side of the housing 1. An alarm 7 is fixedly installed on the top of the digital display counter 6. The digital display counter 6 and the alarm 7 are electrically connected and can automatically count and alarm.

[0028] A material collection box 8 is fixedly installed at the top of the casing 1. A material carrying platform 9 is installed inside the material collection box 8. The material carrying platform 9 is connected to the support shaft 2 and a support mechanism 12 is provided between the two. The support mechanism 12 can increase the support area at the bottom of the material carrying platform 9, improve the stability of the material carrying platform 9, and make the material carrying platform 9 less prone to tilting and shaking.

[0029] The surface of the loading platform 9 has multiple placement positions 16, and a material collection box 17 is installed in each placement position 16. The bottom of the material collection box 17 is engaged with the placement position 16 to prevent displacement. Numbers are pasted or engraved on one side of the placement position 16 and one side of the material collection box 17 for sequential marking. A guide cylinder 11 is fixedly installed on one side of the top of the collection box 8. A conical hopper 20 is detachably installed on the top of the guide cylinder 11 to input the sample.

[0030] In this embodiment, preferably, the drive mechanism 3 includes a support frame 301, a motor 305, and a coupling 306. The bottom end of the support frame 301 is fixedly connected to the inner wall of the bottom end of the housing 1. A support frame 302 is fixedly provided at the top end of the support frame 301. A worm 303 is rotatably connected to one side of the support frame 302 through a bearing. A worm wheel 304 is meshed with the worm 303. The worm wheel 304 is interference-fitted with the support shaft 2. The worm wheel 304 and the worm 303 are manufactured using precision machining technology, and have the characteristics of large transmission ratio, compact structure, smooth operation, and high transmission efficiency. The bottom of the support shaft 2 is rotatably connected to the support frame 301 through a bearing. The motor 305 is fixedly connected to one side of the top end of the support frame 301. The output shaft of the motor 305 is fixedly connected to one end of the worm 303 through the coupling 306.

[0031] The motor 305 is controlled by an external controller (not shown in the figure, a PLC or microcontroller can be selected). The controller outputs a pulse signal every preset time to control the motor 305 to rotate once. Each rotation of the motor 305 drives the worm gear 303 to rotate a certain number of revolutions. The worm gear 303 drives the worm wheel 304 and the support shaft 2 to rotate by a preset angle. Since the transmission between the worm wheel 304 and the worm gear 303 has a self-locking characteristic, when the motor 305 stops rotating, the support shaft 2 can reliably maintain its current position, preventing the material collection box 17 from shifting due to equipment vibration or external disturbance, thereby ensuring the accuracy of the material dropping position.

[0032] In this embodiment, preferably, the counting monitoring mechanism 4 includes an adjustable shaft frame 401 and a synchronous shaft 402. Bearings for supporting the synchronous shaft 402 are installed at both the top and bottom of the adjustable shaft frame 401. A dividing plate is fixedly installed at the top of the synchronous shaft 402, and multiple counting stops 403 are provided on the dividing plate. The counting stops 403 are equidistantly distributed along the circumference of the dividing plate, and the number of counting stops 403 is the same as the number of material collection boxes 17. A synchronous pulley 404 is installed at the bottom of the synchronous shaft 402, and a synchronous pulley 15 corresponding to the synchronous pulley 404 is provided at the bottom of the support shaft 2. A synchronous belt 5 for transmission is wound between the synchronous pulley 404 and the synchronous pulley 15. Since both the synchronous pulley 404 and the synchronous pulley 15 are located at the bottom and there is no obstruction at the bottom, it is convenient to install and remove the synchronous belt 5. The synchronous belt 5 and the synchronous pulley 404... 04. Synchronous pulley 15 together constitute a synchronous transmission system, realizing precise synchronous rotation of both. The inner circumferential surface of the synchronous belt 5 is provided with equidistant teeth, and the outer circumferential surfaces of synchronous pulley 1 404 and synchronous pulley 15 are provided with matching tooth grooves. The two adopt tooth meshing transmission, and there is no relative slippage. Therefore, the transmission ratio is precise and constant. When the support shaft 2 rotates one station, the synchronous belt 5 drives the synchronous shaft 402 and the indexing plate to rotate precisely by the same angle, ensuring that each counting stop bar 403 on the indexing plate maintains a strict one-to-one correspondence with each material collection box 17 on the loading platform 9. That is, the rotation of the counting stop bar 403 is completely synchronized with the rotation of the material collection box 17. The pulse signal generated by the counting sensor 406 is strictly synchronized with the actual rotation position of the material collection box 17, thereby ensuring the accuracy of the box changing number monitoring.

[0033] A protruding plate 405 is fixedly provided on one side of the adjustable shaft bracket 401. A counting sensor 406 corresponding to the counting stop bar 403 is fixedly installed on the surface of the protruding plate 405. The counting sensor 406 and the alarm 7 are both electrically connected to the digital display counter 6. An adjustment assembly for adjusting the position of the adjustable shaft bracket 401 is provided on one side. The adjustment assembly includes a vertical plate 407, which is embedded in one side of the chassis 1. The top and bottom of the vertical plate 407 are provided with rod grooves. A positioning screw 408 is slidably provided in the rod groove. One end of the positioning screw 408 is fixedly connected to the adjustable shaft bracket 401. The top and bottom of both sides of the vertical plate 407 are provided with positioning screws. The adjusting nut 409 is threadedly connected to the screw 408. A wedge-shaped washer is provided between the adjusting nut 409 and the vertical plate 407 to prevent the nut 409 from loosening. When installation or disassembly is required, simply loosen the adjusting nut 409 to remove or insert the positioning screw 408 from the rod groove. When the tension of the synchronous belt 5 needs to be adjusted, loosen the adjusting nut 409 and move the positioning screw 408 along the direction of the rod groove. This will drive the adjustable shaft bracket 401 and the entire counting and monitoring mechanism 4 to move horizontally, thereby changing the center distance between the synchronous pulley 1 404 and the synchronous pulley 2 15 to achieve the purpose of adjusting the tension of the synchronous belt 5. After adjustment, tighten the adjusting nut 409 to lock the position.

[0034] In this embodiment, preferably, the support mechanism 12 includes a turntable 1201. The top of the turntable 1201 has multiple slots 1202. The bottom of the loading platform 9 is fixedly provided with locking blocks 18 that correspond one-to-one with the slots 1202. The top of the support shaft 2 is fixedly provided with a tray 19. The top of the tray 19 is fixedly connected to the middle of the bottom of the turntable 1201 by screws. The bottom of the turntable 1201 is fixedly provided with a retaining ring 1203, the outer diameter of which is the same as the diameter of the turntable 1201. The bottom end of the retaining ring 1203 is fixedly provided with a rubber dustproof ring 1204. The rubber dustproof ring 1204 slides in contact with the top surface of the chassis 1 to prevent dust from entering. The bottom end of the turntable 1201 is fixedly provided with a reinforcing washer 1205 coaxial with the retaining ring 1203. The outer diameter of the reinforcing washer 1205 is smaller than the inner diameter of the retaining ring 1203. The bottom end of the reinforcing washer 1205 is rotatably provided with several balls 1206. The balls 1206 roll in contact with the top surface of the chassis 1 to provide support and reduce friction.

[0035] In this embodiment, preferably, the front of the chassis 1 is provided with an inspection port, and a cover plate 10 is fixedly installed on one side of the inspection port by screws. By loosening the screws and removing the cover plate 10, the interior of the chassis 1 can be repaired and maintained. The front of the collection box 8 is provided with a material outlet, and a cover plate 2 13 is hinged to one side of the material outlet by a hinge. Buckles 14 are installed on the top and bottom of one side of the cover plate 2 13. A bracket is fixed on the top and bottom of one side of the collection box 8 to engage with the buckles 14. The cover plate 2 13 can be quickly opened and fixed by the buckles 14 and the bracket. The cover plate 2 13 can provide protection for the interior of the collection box 8.

[0036] In this embodiment, preferably, a support ring 21 is fixedly provided at the top of the guide cylinder 11, and an installation ring 22 is fixedly provided at the top of the conical hopper 20. The bottom end of the installation ring 22 is fixedly connected to the top end of the support ring 21 by bolts. The installation ring 22 and the support ring 21 are connected by bolts, and the conical hopper 20 is detachable. If the conical hopper 20 is damaged or deformed, the bolts can be loosened to remove it and replace it. Handles 24 are symmetrically welded on both sides of the installation ring 22 to facilitate the removal and placement of the conical hopper 20. A damping rubber pad 23 is sandwiched between the installation ring 22 and the support ring 21 to absorb the impact when the material falls.

[0037] An inclined guide plate 26 is fixedly provided on the inner wall of the feed cylinder 11. A sand and gravel conduit 25 for feeding the guide plate 26 is fixedly connected to the middle of the bottom end of the conical hopper 20. A second sand and gravel conduit 27 is fixedly provided at the bottom end of the guide plate 26. The lower outlet of the second sand and gravel conduit 27 is aligned with a material collection box 17 on the loading platform 9. The first sand and gravel conduit 25, the guide plate 26 and the second sand and gravel conduit 27 can guide the sample inside the conical hopper 20 into the corresponding material collection box 17, making it less likely to spill.

[0038] During use, the operator inserts all empty material collection boxes 17 into the placement positions 16 of the loading platform 9 in the order of their numbers, ensuring that each material collection box 17 is properly engaged with its corresponding placement position 16. The operator then clears the accumulated value of the digital counter 6, closes and locks the cover plate 13 using the buckle 14, installs the conical hopper 20 on the top of the guide cylinder 11, and tightens the connecting bolts between the mounting ring 22 and the support ring 21.

[0039] According to the sampling frequency of the sand and gravel aggregate production line, the rotation time interval of the motor 305 is set through an external controller (PLC or microcontroller), and an alarm threshold is set in the digital display counter 6. This threshold is equal to the total number of material collection boxes 17.

[0040] After the equipment is started, the sand and gravel sample falls from the upstream sampler into the conical hopper 20, and enters the material collection box 17 below the current station through the sand and gravel guide pipe 1 25, guide plate 26, and sand and gravel guide pipe 2 27.

[0041] When the preset time interval is reached, the external controller outputs a pulse signal to start the motor 305. The motor 305 drives the worm 303 to rotate, and the worm 303 drives the worm wheel 304 and the support shaft 2 to rotate by a preset angle. When the support shaft 2 drives the turntable 1201 to rotate, the ball 1206 rolls on the top surface of the housing 1, transferring the weight of the loading platform 9 and the material collection box 17 on it to the housing 1. At the same time, the rotational friction is greatly reduced, making the rotation of the loading platform 9 more convenient and flexible, and completing the automatic replacement of the material collection box 17. Since the transmission between the worm wheel 303 and the worm 304 has a self-locking characteristic, the support shaft 2 automatically locks its position after rotating to the correct position.

[0042] When the support shaft 2 rotates, it drives the synchronous shaft 402 and the indexing plate to rotate synchronously through the synchronous pulley 2 15, the synchronous belt 5, and the synchronous pulley 1 404. A counting stop bar 403 on the indexing plate passes through the detection area of ​​the counting sensor 406. The counting sensor 406 generates a pulse signal and sends it to the digital display counter 6. The digital display counter 6 increases the count for each pulse signal received, indicating that a box changing operation has been completed. The counting monitoring mechanism 4 is located on one side of the chassis 1, which can ensure the space required for installation and monitoring, and facilitates maintenance and debugging.

[0043] When the accumulated value of the digital counter 6 reaches the preset alarm threshold (i.e. the total number of material collection boxes 17), it indicates that all material collection boxes 17 have been filled with samples. The control unit of the digital counter 6 automatically triggers the alarm 7 to issue an audible and visual alarm, prompting the operator to come and collect samples and replace empty boxes.

[0044] After hearing the alarm, the operator opens cover plate 2 13, takes out the support platform 9 or material collection box 17, and sends it to the laboratory for testing. Then, the new empty material collection box 17 is reinstalled into the placement position 16 in the order of the numbers. Cover plate 2 13 is closed, and the operator manually presses the reset button of the digital display counter 6, or sends the reset signal to the digital display counter 6 through the controller to reset the accumulated value to zero. The equipment then enters the next working cycle.

[0045] When the tension of the synchronous belt 5 needs to be adjusted, the operator only needs to loosen the adjusting nut 409 and move the positioning screw 408 along the direction of the rod groove. This will cause the adjustable shaft bracket 401 and the entire counting and monitoring mechanism 4 to move horizontally, thereby changing the center distance between the first synchronous pulley 404 and the second synchronous pulley 15, and achieving precise adjustment of the tension of the synchronous belt 5. Specifically, moving it away from the second synchronous pulley 15 will increase the center distance between the first synchronous pulley 404 and the second synchronous pulley 15, thereby increasing the tension of the synchronous belt 5; moving it closer to the second synchronous pulley 15 will decrease the center distance, thereby decreasing the tension. After adjustment, tightening the adjusting nut 409 will lock the position. When it is necessary to inspect or maintain the internal components of the chassis 1, loosen the screws and remove the cover plate 10 to inspect and maintain the drive mechanism 3, the synchronous belt 5, and other components.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic sample collection box replacement mechanism for an automatic sampling machine, comprising a chassis (1), characterized in that: The housing (1) is rotatably provided with a support shaft (2). The bottom of the support shaft (2) is provided with a drive mechanism (3) for driving its rotation. The side of the housing (1) is provided with a counting and monitoring mechanism (4) that is connected to the support shaft (2) in transmission. The top of the side of the housing (1) is fixedly installed with a digital display counter (6). The top of the digital display counter (6) is fixedly installed with an alarm (7). The top of the housing (1) is fixedly provided with a collection box (8). The inside of the collection box (8) is provided with a loading platform (9) connected to the support shaft (2). A support mechanism (12) is provided between the loading platform (9) and the support shaft (2). Multiple material collection boxes (17) are installed on the surface of the loading platform (9). A guide cylinder (11) is fixedly provided on one side of the top of the collection box (8). A conical hopper (20) is detachably installed on the top of the guide cylinder (11).

2. The automatic sample collection box replacement mechanism of the automatic sampling machine according to claim 1, characterized in that: The drive mechanism (3) includes a support frame (301), a motor (305), and a coupling (306). The bottom end of the support frame (301) is fixedly connected to the inner wall of the bottom end of the housing (1). A support frame (302) is fixedly provided at the top end of the support frame (301). A worm (303) is rotatably connected to one side of the support frame (302) through a bearing. A worm wheel (304) is meshed with the worm (303). The worm wheel (304) is interference-fitted with the support shaft (2). The bottom of the support shaft (2) is rotatably connected to the support frame (301) through a bearing. The motor (305) is fixedly connected to one side of the top end of the support frame (301). The output shaft of the motor (305) is fixedly connected to one end of the worm (303) through the coupling (306).

3. The automatic sample collection box replacement mechanism of the automatic sampling machine according to claim 1, characterized in that: The counting and monitoring mechanism (4) includes an adjustable shaft frame (401) and a synchronous shaft (402). The top and bottom of the adjustable shaft frame (401) are equipped with bearings to support the synchronous shaft (402). A dividing plate is fixedly installed at the top of the synchronous shaft (402). Multiple counting stops (403) are provided on the dividing plate, equidistantly distributed along the circumference of the dividing plate. The number of counting stops (403) is the same as the number of material collection boxes (17). A synchronous... The bottom of the support shaft (2) is provided with a synchronous wheel (15) corresponding to the synchronous wheel (404). A synchronous belt (5) for transmission is wound between the synchronous wheel (404) and the synchronous wheel (15). A protruding plate (405) is fixedly provided on one side of the adjustable shaft frame (401). A counting sensor (406) corresponding to the counting stop bar (403) is fixedly installed on the surface of the protruding plate (405). The counting sensor (406) and the alarm (7) are both electrically connected to the digital display counter (6).

4. The automatic sample collection box replacement mechanism of the automatic sampling machine according to claim 3, characterized in that: The adjustable shaft bracket (401) has an adjustment assembly for adjusting its position on one side. The adjustment assembly includes a vertical plate (407), which is embedded in one side of the chassis (1). The top and bottom of the vertical plate (407) are provided with rod grooves, and a positioning screw (408) is slidably provided in the rod groove. One end of the positioning screw (408) is fixedly connected to the adjustable shaft bracket (401). The top and bottom of both sides of the vertical plate (407) are provided with adjusting nuts (409) that are threadedly connected to the positioning screw (408). A wedge-shaped washer for preventing loosening is provided between the adjusting nut (409) and the vertical plate (407).

5. The automatic sample collection box replacement mechanism of the automatic sampler according to claim 1, characterized in that: The support mechanism (12) includes a turntable (1201), the top of which is provided with multiple slots (1202). The bottom of the loading platform (9) is fixedly provided with a locking block (18) that engages with the corresponding slot (1202). The top of the support shaft (2) is fixedly provided with a tray (19), the top of which is fixedly connected to the middle of the bottom of the turntable (1201) by screws. The bottom of the turntable (1201) is fixedly provided with a retaining ring (1203). The outer diameter of the ring (1203) is equal to the diameter of the turntable (1201), and the bottom end of the retaining ring (1203) is fixedly provided with a rubber dustproof ring (1204) to prevent dust from entering. The bottom end of the turntable (1201) is fixedly provided with a reinforcing washer (1205) coaxial with the retaining ring (1203). The outer diameter of the reinforcing washer (1205) is smaller than the inner diameter of the retaining ring (1203), and the bottom end of the reinforcing washer (1205) is provided with a number of ball bearings (1206) that are slidably connected to the chassis (1).

6. The automatic sample collection box replacement mechanism of the automatic sampling machine according to claim 1, characterized in that: The front of the chassis (1) is provided with an inspection port. One side of the inspection port is fixedly installed with a cover plate (10) by screws. The front of the collection box (8) is provided with a material outlet. One side of the material outlet is hinged with a cover plate (13). The top and bottom of one side of the cover plate (13) are both equipped with buckles (14). The top and bottom of one side of the collection box (8) are both fixedly provided with a card seat that engages with the buckle (14).

7. The automatic sample collection box replacement mechanism of the automatic sampling machine according to claim 1, characterized in that: The top of the feed cylinder (11) is fixedly provided with a support ring (21), the top of the conical hopper (20) is fixedly provided with an installation ring (22), the bottom end of the installation ring (22) is fixedly connected to the top end of the support ring (21) by bolts, and handles (24) are fixedly provided on both sides of the installation ring (22). A damping rubber pad (23) for reducing material impact is provided between the installation ring (22) and the support ring (21). A guide plate (26) for guiding the sand and gravel sample is fixedly provided on the inner wall of the feed cylinder (11). A sand and gravel conduit first (25) for feeding the guide plate (26) is fixedly connected to the middle of the bottom end of the conical hopper (20). A sand and gravel conduit second (27) corresponding to the material collection box (17) is fixedly provided at the bottom end of the guide plate (26).

8. The automatic sample collection box replacement mechanism of the automatic sampling machine according to claim 1, characterized in that: The surface of the loading platform (9) is provided with a placement position (16) corresponding to the material collection box (17). The bottom of the material collection box (17) is engaged with the inside of the placement position (16). Both the placement position (16) and the material collection box (17) are marked with numbers to indicate their order.

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