Automatic taking and placing device for detection samples

Abstract

The invention provides an automatic taking and placing device for detection samples, and relates to the technical field of detection samples, the automatic taking and placing device comprises a detection box, a sample storage mechanism and an access mechanism are arranged in the detection box, the access mechanism is arranged on the inner wall of the detection box above the sample storage mechanism, and a ventilation mechanism is arranged at the top of the detection box; the detection box is used for supporting and fixing the sample storage mechanism and the access mechanism, the sample storage mechanism is used for storing test tubes, and the access mechanism is used for grabbing various powder sample test tubes from the outside of the detection box and transporting and storing the powder sample test tubes into the sample storage mechanism or taking the powder sample test tubes out of the sample storage mechanism; the ventilation mechanism sucks and collects powder or dust leaked or brought in the test tubes in the detection box, on the premise that the extraction and placement efficiency of the powder sample test tubes is improved, the environment for taking, placing and storing the powder sample test tubes is subjected to ventilation and collection treatment, the powder is prevented from polluting a laboratory and the detection box, the health of workers is prevented from being damaged, and the working efficiency is improved. And the subsequent detection efficiency and accuracy of the powder sample are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of detection samples, and in particular to an automatic taking and placing device for detection samples. Background Art

[0002] With the development of science and technology in my country, the demand for various types of solid sample testing laboratories is increasing, and key laboratories in various disciplines, schools, and systems are emerging in an endless stream.

[0003] Laboratory test samples are in three states: liquid, solid and gas. In solid testing, some are in dust state. If the solid laboratory does not pay attention to the prevention and control of dust samples, the dust will spread to the entire laboratory, causing the dust concentration in the testing environment to increase, which is prone to combustion and explosion accidents. It will also cause lung fibrosis in testers and increase the risk of pneumoconiosis.

[0004] The traditional sample placement process usually requires manual participation, which is not only inefficient but also easily affected by human factors, leading to doubts about the accuracy and reliability of the test results. Therefore, developing a device that can automatically complete sample placement is of great significance to improve detection efficiency and accuracy.

[0005] Therefore, it is particularly important to design an automatic pick-and-place device for testing samples. Summary of the invention

[0006] The invention provides an automatic taking and placing device for testing samples, which is used to solve the defects in the prior art.

[0007] The present invention provides an automatic sample taking and placing device, comprising: a test box, wherein a sample storage mechanism and a storage and retrieval mechanism are arranged in the test box, the storage and retrieval mechanism is arranged on the inner wall of the test box above the sample storage mechanism, and a ventilation mechanism is arranged on the top of the test box.

[0008] Preferably, the sample storage mechanism comprises support columns, four of which are symmetrically arranged on the bottom of the detection box, the tops of the four support columns are respectively sleeved with support sleeves, the support sleeves are provided with buffer springs, the tops of the four support sleeves are provided with sample storage tables, two rotating shafts are vertically inserted on the sample storage table, the bottoms of the rotating shafts are rotatably inserted in the bottom of the detection box, bearings are respectively provided between the rotating shafts and the sample storage table and the bottom of the detection box, the two rotating shafts below the sample storage table are both provided with first bevel gears, the bottom of the detection box is provided with a fixed table and a first motor, a transmission shaft is rotatably provided on the fixed table, two second bevel gears are provided on both ends of the transmission shaft, the two second bevel gears are respectively meshed with the two first bevel gears, a third bevel gear is provided at the driving end of the first motor, a fourth bevel gear is provided in the middle of the transmission shaft, the third bevel gear is meshed with the fourth bevel gear, a rotating roller is vertically and coaxially arranged on the rotating shaft, a transmission belt is provided for the external transmission of the two rotating rollers, and a plurality of ferrules for storing test tubes are provided on the transmission belt.

[0009] Preferably, the storage and retrieval mechanism includes a supporting square column, a limiting column is arranged outside the detection box, the supporting square column passes through a sampling slot opened on the detection box and is arranged between the inner wall of the supporting square column and the limiting column, one end of the deceleration spring mounted on the supporting square column is fixed to the limiting column, a horizontal moving component is slidably arranged on the supporting square column, and a longitudinal moving component is arranged on the horizontal moving component.

[0010] Preferably, the horizontal moving component includes a moving platform, which is mounted on the supporting square column, the top of the supporting square column is provided with teeth, a moving groove is opened in the moving platform above the supporting square column, a first rotating wheel with teeth on the outer surface is rotatably arranged in the moving groove, the teeth on the outer surface of the first rotating wheel are meshed with the teeth on the top of the supporting square column, a second motor is provided on one side of the moving platform, and the driving end of the second motor is transmission-connected to the first rotating wheel.

[0011] Preferably, the longitudinal moving assembly includes a limit platform, the limit platform is fixedly arranged on one side of the moving platform, a third motor is fixedly arranged on the side of the moving platform, a second rotating wheel with a toothed outer surface is rotatably arranged on the side of the moving platform, a driving end of the third motor is transmission-connected to a fifth bevel gear, a sixth bevel gear is coaxially fixedly arranged on the outer side of the second rotating wheel, a lifting column is vertically inserted in the limit platform, and a side of the lifting column facing the third motor is provided with teeth, the teeth on the outer surface of the second rotating wheel are meshed with the teeth on the lifting column, the fifth bevel gear is meshed with the sixth bevel gear, a limit plate is arranged on the top of the lifting column, and a grabbing head for grabbing a test tube is arranged on the bottom of the lifting column.

[0012] Preferably, it also includes: Stress detection module 1, used to measure the vertical force on the center of the rotating shaft; Stress detection module 2 is used to measure the horizontal force on the center of the rotating shaft; A calculation module 1 is used to calculate the actual torque of the rotating shaft based on the vertical force at the center of the rotating shaft; An alarm module, used for issuing an alarm; A processing module, used for comparing the actual bearing torque of the rotating shaft obtained by the calculation module 1 with the rated bearing torque of the rotating shaft; The control module controls the alarm module to sound an alarm when the actual torque borne by the rotating shaft is greater than the rated torque borne by the rotating shaft, and controls the first motor to stop working at the same time; when the actual torque borne by the rotating shaft is less than or equal to the rated torque borne by the rotating shaft, the first motor works normally.

[0013] Preferably, the calculation module 1 calculates based on the following formula 1: ; is the actual torque borne by the rotating shaft, is the diameter of the rotating shaft, is the pitch circle pressure angle of the first bevel gear and the second bevel gear, is the rated bending stress of the rotating shaft, is the vertical force at the center of the rotating shaft, is the horizontal force at the center of the rotating shaft, is the distance from the center of the rotating shaft to the rotating roller, is the vertical distance from the center of the rotating shaft to the bottom of the detection box, is the transmission correction factor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the present invention; Figure 2 It is a schematic diagram of the overall cross-sectional structure provided by an embodiment of the present invention; Figure 3 is a schematic cross-sectional structure diagram of a sample storage mechanism provided by an embodiment of the present invention; Figure 4 is a schematic cross-sectional structural diagram of a mobile station provided by an embodiment of the present invention; Figure 5 It is a schematic cross-sectional structure diagram of a limit platform provided in an embodiment of the present invention.

[0016] Reference numerals: 1. Detection box; 11. Sampling slot; 2. Ventilation mechanism; 3. Sample storage mechanism; 31. Support column; 32. Support sleeve; 321. Buffer spring; 33. Sample storage table; 34. Rotating shaft; 341. First bevel gear; 35. Bearing; 36. Fixed table; 37. First motor; 371. Third bevel gear; 38. Transmission shaft; 381. Second bevel gear; 382. Fourth bevel gear; 39. Rotating roller; 40. Conveyor belt ; 41. Card sleeve; 5. Storage and retrieval mechanism; 51. Limit column; 52. Support square column; 53. Deceleration spring; 54. Moving table; 541. Moving slot; 542. First rotating wheel; 543. Second motor; 55. Limit table; 551. Third motor; 552. Second rotating wheel; 553. Fifth bevel gear; 554. Sixth bevel gear; 555. Lifting column; 556. Limit plate; 557. Grasping head; 6. Test tube. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0019] The present invention provides the following embodiments Example 1 The embodiment of the present invention provides an automatic sample taking and placing device, such as Figure 1-Figure 5As shown, it comprises: a detection box 1, in which a sample storage mechanism 3 and a storage and access mechanism 5 are arranged, the storage and access mechanism 5 is arranged on the inner wall of the detection box 1 above the sample storage mechanism 3, and a ventilation mechanism 2 is arranged on the top of the detection box 1.

[0020] The working principle and beneficial effects of the above technical scheme are as follows: the detection box 1 supports and fixes the sample storage mechanism 3 and the storage and retrieval mechanism 5, the sample storage mechanism 3 stores and places the various types of powder samples loaded into the test tube 6 respectively, the storage and retrieval mechanism 5 grabs the various types of powder sample test tubes 6 from outside the detection box 1 and transports them into the sample storage mechanism 3, or takes the powder sample test tubes 6 out of the sample storage mechanism 3 and places them outside the detection box 1 to be taken away by the staff, the ventilation mechanism 2 is a conventional ventilation tool in the prior art, the ventilation mechanism 2 sucks away and collects the powder or dust leaked or brought into the test tube 6 in the detection box 1, and on the premise of improving the extraction and placement efficiency of the powder sample test tube 6, the environment for taking, placing and storing the powder sample test tube 6 is ventilated and collected to prevent the powder from contaminating the laboratory and the detection box 1 from being contaminated, and the health of the staff from being damaged, thereby improving the subsequent detection efficiency and accuracy of the powder samples.

[0021] Example 2 On the basis of Example 1, Figure 1-Figure 5 As shown, the sample storage mechanism 3 includes support columns 31, four of the support columns 31 are symmetrically arranged on the bottom of the detection box 1, the tops of the four support columns 31 are respectively sleeved with support sleeves 32, and buffer springs 321 are arranged in the support sleeves 32, and sample storage tables 33 are arranged on the tops of the four support sleeves 32, two rotating shafts 34 are vertically inserted on the sample storage table 33, and the bottom of the rotating shaft 34 is rotatably inserted in the bottom of the detection box 1, and bearings 35 are respectively arranged between the rotating shaft 34 and the sample storage table 33 and the bottom of the detection box 1, and the two rotating shafts 34 below the sample storage table 33 are each provided with a first bevel gear 341, and the detection box 1 A fixed platform 36 and a first motor 37 are provided at the bottom, a transmission shaft 38 is rotatably provided on the fixed platform 36, two second bevel gears 381 are provided at both ends of the transmission shaft 38, the two second bevel gears 381 are respectively meshed with the two first bevel gears 341, a third bevel gear 371 is provided at the driving end of the first motor 37, a fourth bevel gear 382 is provided in the middle of the transmission shaft 38, the third bevel gear 371 is meshed with the fourth bevel gear 382, ​​a rotating roller 39 is vertically and coaxially provided on the rotating shaft 34, a conveyor belt 40 is provided for external transmission of the two rotating rollers 39, and a plurality of ferrules 41 for storing test tubes 6 are provided on the conveyor belt 40.

[0022] The working principle and beneficial effects of the above technical solution are as follows: the detection box 1 supports and fixes the four support columns 31, the four support columns 31 support and fix the support sleeves 32 and the buffer springs 321 thereon, the buffer springs 321 buffer the impact force between the support sleeves 32 and the support columns 31, the four support sleeves 32 support and fix the sample storage table 33, the sample storage table 33 rotationally limits the rotating shaft 34 through the bearing 35, the bottom of the detection box 1 rotationally limits the rotating shaft 34 through the bearing 35, the rotating shaft 34 fixes the rotating roller 39, the rotating shaft 34 rotates synchronously with the rotating roller 39, the two rotating rollers 39 drive the conveyor belt 40 to move, and the conveyor belt 4 0 drives the multiple ferrules 41 thereon to move, the ferrules 41 fix and limit the test tube 6, the first motor 37 drives the third bevel gear 371 to rotate through the driving end, the transmission shaft 38 drives the transmission shaft 38 to rotate due to the engagement of the fourth bevel gear 382 and the third bevel gear 371 thereon, the transmission shaft 38 drives the two second bevel gears 381 thereon to rotate synchronously, the engagement of the second bevel gear 381 and the first bevel gear 341 drives the two rotating shafts 34 and the two rotating rollers 39 thereon to rotate, so that the test tubes 6 set in the multiple ferrules 41 are rotated, and the powder sample in the test tube 6 is shaken evenly, and it is convenient to move the marked test tube 6 to the preset position.

[0023] Example 3 On the basis of Example 2, Figure 1-Figure 5 As shown, the storage and retrieval mechanism 5 includes a supporting square column 52, and a limiting column 51 is arranged outside the detection box 1. The supporting square column 52 passes through the sampling slot 11 opened on the detection box 1 and is arranged between the inner wall of the supporting square column 52 and the limiting column 51. One end of the deceleration spring 53 sleeved on the supporting square column 52 is fixed to the limiting column 51. A horizontal moving component is slidably arranged on the supporting square column 52, and a longitudinal moving component is arranged on the horizontal moving component.

[0024] The working principle and beneficial effects of the above technical scheme are as follows: the inner wall of the detection box 1 and the limiting column 51 fix the supporting square column 52, the horizontal moving component reaches the top of the powder sample test tube 6 along the supporting square column 52, the longitudinal moving component facilitates the lifting and lowering of the grab head 557 to a suitable grabbing position to take away the powder sample test tube 6, the sampling slot 11 facilitates the grasped powder sample test tube 6 to be sent to the outside of the detection box 1 for the staff to take away, and the deceleration spring 53 facilitates the horizontal moving component to assist in deceleration when sending the grasped powder sample test tube 6 to the side of the limiting column 51, thereby preventing the horizontal moving component from colliding with the limiting column 51 and causing damage to the device and the powder sample test tube 6.

[0025] Example 4 On the basis of Example 3, Figure 1-Figure 5As shown, the horizontal moving assembly includes a moving platform 54, which is sleeved on the supporting square column 52. The top of the supporting square column 52 is provided with teeth. A moving groove 541 is opened in the moving platform 54 above the supporting square column 52. A first rotating wheel 542 with teeth on the outer surface is rotatably arranged in the moving groove 541. The teeth on the outer surface of the first rotating wheel 542 are meshed with the teeth on the top of the supporting square column 52. A second motor 543 is provided on one side of the moving platform 54, and the driving end of the second motor 543 is transmission-connected to the first rotating wheel 542.

[0026] The working principle and beneficial effects of the above technical solution are as follows: the supporting square column 52 provides limited support for the moving platform 54, the moving groove 541 provides rotational limit for the first rotating wheel 542, the driving end of the second motor 543 drives the first rotating wheel 542 to rotate, and the first rotating wheel 542 engages with the teeth on the supporting square column 52 through the teeth thereon, and the first rotating wheel 542 drives the moving platform 54 and the longitudinal moving component thereon to move horizontally along the supporting square column 52.

[0027] Example 5 On the basis of Example 4, Figure 1-Figure 5 As shown, the longitudinal moving assembly includes a limit platform 55, which is fixedly arranged on one side of the moving platform 54, and a third motor 551 is fixedly arranged on the side of the moving platform 54. A second rotating wheel 552 with a tooth pattern on the outer surface is rotatably arranged on the side of the moving platform 54, and a fifth bevel gear 553 is transmission-connected to the driving end of the third motor 551, and a sixth bevel gear 554 is coaxially fixedly arranged on the outer side of the second rotating wheel 552. A lifting column 555 is vertically inserted in the limit platform 55, and a side of the lifting column 555 facing the third motor 551 is provided with teeth, the teeth on the outer surface of the second rotating wheel 552 are meshed with the teeth on the lifting column 555, and the fifth bevel gear 553 is meshed with the sixth bevel gear 554. A limit plate 556 is arranged on the top of the lifting column 555, and a grabber 557 for grabbing the test tube 6 is arranged on the bottom of the lifting column 555.

[0028] The working principle and beneficial effects of the above technical solution are as follows: the gripping head 557 is a prior art, such as CN207373198U, which discloses a test tube grabbing device, the moving platform 54 fixes the limiting platform 55, the moving platform 54 supports and limits the third motor 551 and the second rotating wheel 552, the limiting platform 55 vertically limits the lifting column 555, the lifting column 555 supports and fixes the limiting plate 556 and the gripping head 557, the limiting column 51 prevents the lifting column 555 from falling, the driving shaft of the third motor 551 drives the fifth bevel gear 553 to rotate, and the fifth bevel gear 553 is rotated. The gear 553 drives the sixth bevel gear 554 and the second rotating wheel 552 to rotate synchronously through meshing. The second rotating wheel 552 drives the lifting column 555 to rise and fall in the vertical direction within the limit platform 55 by meshing with the tooth pattern on one side of the lifting column 555. After adjusting the distance between the grab head 557 and the powder sample tube 6 in the vertical direction, the powder sample tube 6 is grabbed, and then the horizontal moving component is further adjusted to send the powder sample tube 6 to the outside of the detection box 1 for inspection by the staff, thereby improving the extraction and placement efficiency of the powder sample tube 6. The grab head 557 is a conventional grabbing tool in the existing technology.

[0029] Example 6 On the basis of Example 5, the present invention further comprises: Stress detection module 1, used to measure the vertical force on the center of the rotating shaft 34; Stress detection module 2, used to measure the horizontal force on the center of the rotating shaft 34; A calculation module 1, used to calculate the actual torque borne by the rotating shaft 34 based on the vertical force borne by the center of the rotating shaft 34; An alarm module, used for issuing an alarm; A processing module, used for comparing the actual torque of the rotating shaft 34 obtained by the calculation module 1 with the rated torque of the rotating shaft 34; The control module controls the alarm module to sound an alarm when the actual torque borne by the rotating shaft 34 is greater than the rated torque borne by the rotating shaft 34 , and controls the first motor 37 to stop working at the same time; when the actual torque borne by the rotating shaft 34 is less than or equal to the rated torque borne by the rotating shaft 34 , the first motor 37 works normally.

[0030] The working principle and beneficial effects of the above technical solution are as follows: stress detection module 1 measures the vertical force at the center of the rotating shaft 34, stress detection module 2 measures the horizontal force at the center of the rotating shaft 34, calculation module 1 calculates the actual torque borne by the rotating shaft 34 based on the vertical force borne by the center of the rotating shaft 34, the alarm module is used to issue an alarm, and the processing module compares the actual torque borne by the rotating shaft 34 obtained by the calculation module 1 with the rated torque borne by the rotating shaft 34. When the actual torque borne by the rotating shaft 34 is greater than the rated torque borne by the rotating shaft 34, the control module controls the alarm module to issue an alarm and at the same time controls the first motor 37 to stop working. When the actual torque borne by the rotating shaft 34 is less than or equal to the rated torque borne by the rotating shaft 34, the first motor 37 works normally.

[0031] Example 7 Based on Example 6, the calculation module 1 calculates based on the following formula 1: ; is the actual torque borne by the rotating shaft 34, is the shaft diameter of the rotating shaft 34, is the pitch circle pressure angle of the first bevel gear 341 and the second bevel gear 381, is the rated bending stress of the rotating shaft 34, is the vertical force on the center of the rotating shaft 34, is the horizontal force on the center of the rotating shaft 34, is the distance from the center of the rotating shaft 34 to the rotating roller 39, is the vertical distance from the center of the rotating shaft 34 to the bottom of the detection box 1, is the transmission correction factor.

[0032] The working principle and beneficial effects of the above technical solution are as follows: the transmission correction coefficient of the rotating shaft 34 is in the range of 0.18-0.21. The actual torque borne by the rotating shaft 34 is calculated. When the actual torque borne by the rotating shaft 34 is greater than the rated torque borne by the rotating shaft 34, the control module controls the alarm module to sound an alarm and controls the first motor 37 to stop working. When the actual torque borne by the rotating shaft 34 is less than or equal to the rated torque borne by the rotating shaft 34, the first motor 37 works normally.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic sample pick-up and placement device, characterized in that: include: A detection box (1) is provided with a sample storage mechanism (3) and a storage and retrieval mechanism (5) in the detection box (1); the storage and retrieval mechanism (5) is arranged on the inner wall of the detection box (1) above the sample storage mechanism (3); and a ventilation mechanism (2) is arranged on the top of the detection box (1).

2. The automatic sample taking and placing device according to claim 1, characterized in that: The sample storage mechanism (3) comprises a support column (31), four of the support columns (31) are symmetrically arranged on the bottom of the detection box (1), the tops of the four support columns (31) are respectively sleeved with support sleeves (32), the support sleeves (32) are provided with buffer springs (321), the tops of the four support sleeves (32) are provided with sample storage tables (33), two rotating shafts (34) are vertically inserted on the sample storage table (33), the bottoms of the rotating shafts (34) are rotatably inserted in the bottom of the detection box (1), bearings (35) are respectively arranged between the rotating shafts (34) and the sample storage table (33) and the bottom of the detection box (1), the two rotating shafts (34) below the sample storage table (33) are both provided with first bevel gears (341), the bottom of the detection box (1) A fixed platform (36) and a first motor (37) are provided at the top, a transmission shaft (38) is rotatably provided on the fixed platform (36), two second bevel gears (381) are provided at both ends of the transmission shaft (38), the two second bevel gears (381) are respectively meshed with the two first bevel gears (341), a third bevel gear (371) is provided at the driving end of the first motor (37), a fourth bevel gear (382) is provided at the middle of the transmission shaft (38), the third bevel gear (371) is meshed with the fourth bevel gear (382), a rotating roller (39) is vertically and coaxially provided on the rotating shaft (34), a transmission belt (40) is provided externally of the two rotating rollers (39), and a plurality of ferrules (41) for storing test tubes (6) are provided on the transmission belt (40).

3. The automatic sample taking and placing device according to claim 2, characterized in that: The storage and retrieval mechanism (5) comprises a supporting square column (52), a limiting column (51) is arranged outside the detection box (1), the supporting square column (52) passes through a sampling slot (11) provided on the detection box (1) and is arranged between the inner wall of the supporting square column (52) and the limiting column (51), one end of a deceleration spring (53) sleeved on the supporting square column (52) is fixed to the limiting column (51), a horizontal moving component is slidably arranged on the supporting square column (52), and a longitudinal moving component is arranged on the horizontal moving component.

4. The automatic sample taking and placing device according to claim 3 is characterized in that: The horizontal moving assembly comprises a moving platform (54), the moving platform (54) being sleeved on the supporting square column (52), the top of the supporting square column (52) being provided with teeth, a moving groove (541) being provided in the moving platform (54) above the supporting square column (52), a first rotating wheel (542) having teeth on its outer surface being rotatably provided in the moving groove (541), the teeth on the outer surface of the first rotating wheel (542) being meshed with the teeth on the top of the supporting square column (52), a second motor (543) being provided on one side of the moving platform (54), and a driving end of the second motor (543) being transmission-connected to the first rotating wheel (542).

5. The automatic sample taking and placing device according to claim 4, characterized in that: The longitudinal moving assembly comprises a limit platform (55), the limit platform (55) being fixedly arranged on one side of the moving platform (54), a third motor (551) being fixedly arranged on the side of the moving platform (54), a second rotating wheel (552) having a tooth pattern on its outer surface being rotatably arranged on the side of the moving platform (54), a fifth bevel gear (553) being transmission-connected to the driving end of the third motor (551), a sixth bevel gear (554) being coaxially fixedly arranged on the outer side of the second rotating wheel (552), the limit platform (55) being fixedly arranged on the side of the moving platform (54), A lifting column (555) is vertically inserted in the platform (55); a tooth pattern is provided on a side of the lifting column (555) facing the third motor (551); the tooth pattern on the outer surface of the second rotating wheel (552) meshes with the tooth pattern on the lifting column (555); the fifth bevel gear (553) meshes with the sixth bevel gear (554); a limit plate (556) is provided on the top of the lifting column (555); and a gripper (557) for gripping a test tube (6) is provided on the bottom of the lifting column (555).

6. The automatic sample taking and placing device according to claim 5, characterized in that: Also includes: A stress detection module 1, used to measure the vertical force applied to the center of the rotating shaft (34); A second stress detection module, used to measure the horizontal force applied to the center of the rotating shaft (34); A calculation module 1, used to calculate the actual torque borne by the rotating shaft (34) based on the vertical force borne by the center of the rotating shaft (34); An alarm module, used for issuing an alarm; A processing module, used for comparing the actual bearing torque of the rotating shaft (34) obtained by the calculation module 1 with the rated bearing torque of the rotating shaft (34); The control module controls the alarm module to sound an alarm when the actual torque borne by the rotating shaft (34) is greater than the rated torque borne by the rotating shaft (34), and simultaneously controls the first motor (37) to stop working; and when the actual torque borne by the rotating shaft (34) is less than or equal to the rated torque borne by the rotating shaft (34), the first motor (37) works normally.

7. The automatic sample taking and placing device according to claim 6, characterized in that: The calculation module 1 calculates based on the following formula 1: ； is the actual torque borne by the rotating shaft (34), is the shaft diameter of the rotating shaft (34), is the pitch circle pressure angle of the first bevel gear (341) and the second bevel gear (381), is the rated bending stress of the rotating shaft (34), is the vertical force applied to the center of the rotating shaft (34) measured by the stress detection module 1, is the horizontal force applied to the center of the rotating shaft (34) measured by the stress detection module 2, is the distance from the center of the rotating shaft (34) to the rotating roller (39), is the vertical distance from the center of the rotating shaft (34) to the bottom of the detection box (1), is the transmission correction factor.

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