Sample tube fracture analysis device

Abstract

The invention relates to the technical field of analysis equipment, in particular to a sample tube fracture analysis device which is used for analysis equipment and comprises a linkage structure, the driving end of the linkage structure is connected with a probe, and the probe is located under the clamping end of a clamping module; a sensor is arranged below the passive end of the linkage structure, and when the sample tube is clamped, the linkage structure can perform corresponding action according to the tube bottom fracture condition to trigger the sensor to perform fracture analysis; the sensor is connected with the display terminal and the alarm lamp and used for prompting workers, and the master controller is connected with the three-axis movement module and facilitates collection of damaged sample tubes; a pressure sensing module is arranged on the clamping surface of the clamping module, and damage detection can be carried out on the pipe wall of the side face of the sample pipe. According to the invention, in the process of analyzing the total phosphorus and the total nitrogen of the water sample, the breakage of the sample tube, especially the falling condition of the bottom of the flat-bottom sample tube, is quickly identified, and the technical problem of quickly cleaning the damaged sample tube is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of analytical equipment, and more particularly, to a sample tube rupture analysis device for an analytical equipment. Background Art

[0002] As a key equipment widely used in environmental monitoring and sewage treatment, the fully automatic total phosphorus and total nitrogen analyzer can efficiently measure the total phosphorus (TP) and total nitrogen (TN) contents in water samples through technologies such as high-temperature and high-pressure digestion, chemical color reaction, and absorbance detection. Its detection principle is to convert organic phosphorus / nitrogen and inorganic forms into detectable orthophosphate or nitrate through the persulfate oxidation method under high-temperature and high-pressure digestion conditions, and then use an ultraviolet-visible spectrophotometer to measure the absorbance, and calculate the concentration by combining with a standard curve.

[0003] In the prior art, in order to achieve the analysis of total phosphorus and total nitrogen in water samples, the fully automatic total phosphorus and total nitrogen analyzer includes a high-temperature digester and a colorimetric detector. The conveying device first conveys the sample tube filled with the sealed water sample to the high-temperature digestion module for high-temperature and high-pressure digestion, and then places the sample tube on the sample rack to cool. After cooling, a color-developing reagent is injected and sealed, and the color reaction is triggered by shaking evenly. Then the sample tube is conveyed to the colorimetric detector for absorbance detection. By comparing the absorbance value with the standard curve, the total phosphorus and total nitrogen concentrations in the water sample are calculated.

[0004] Among them, the sample tube, as one of the core components for containing water samples and subsequent colorimetric comparison tests, is usually made of high borosilicate glass, and it is prone to uneven wall thickness processing and the presence of fine defects on the wall surface. Especially for the flat-bottom sample tube that is more frequently used in high-temperature digestion, these defective defects will cause large uneven thermal stress and stress concentration along the corners of the flat bottom during the high-temperature and high-pressure digestion process of the flat-bottom sample tube, resulting in the situation that the bottom of the flat-bottom sample tube falls off integrally along the corners during the high-temperature and high-pressure digestion process. Moreover, during the use of the sample tube, it needs to withstand high temperature, high pressure, and the corrosion of strong acid and strong oxidation reagents for a long time, and its mechanical properties will gradually degrade with the use time, easily leading to the rupture of the sample tube wall.

[0005] Although the flat-bottom sample tube is prone to bottom detachment, its flat bottom is more stable when placed in the instrument during use. Especially in the clamping module or digestion tank, it can be evenly stressed to avoid tilting or sliding; moreover, the flat-bottom structure has a larger and more uniform heat-receiving area, which can further improve the digestion efficiency during high-temperature digestion. Its large-area plane is also conducive to the full contact of the reagent and the sample. Therefore, the flat-bottom sample tube is still widely used during the high-temperature and high-pressure digestion process.

[0006] However, if the problem of easy breakage of the sample tube cannot be identified in a timely manner during the analysis of total phosphorus and total nitrogen in the water sample, and corresponding countermeasures are not taken, the reagent added during the subsequent analysis process will flow into the instrument from the damaged sample tube, corroding the instrument and easily causing an electrical short circuit, which may further lead to major safety accidents. Summary of the Invention

[0007] The purpose of this application is to provide an analysis device for sample tube breakage, which realizes the technical problems of quickly identifying the breakage of the sample tube, especially the detachment of the bottom of the flat-bottom sample tube, and quickly cleaning the damaged sample tube during the analysis of total phosphorus and total nitrogen in the water sample.

[0008] To solve the above technical problems, the following solutions are adopted in this application: An analysis device for sample tube breakage includes a linkage structure.

[0009] Preferably, a probe is connected to the active end of the linkage structure, and the probe is located directly below the clamping end of the clamping module of the analysis instrument.

[0010] Preferably, a sensor is arranged below the passive end of the linkage structure.

[0011] Preferably, the probe is located on the movement path of the sample tube. When the bottom of the sample tube is not detached, the probe contacts the bottom of the sample tube moving along the movement path, causing the active end of the linkage structure to be stressed, the passive end of the linkage structure to move, and the sensor to sense the change.

[0012] Preferably, when the bottom of the sample tube detaches, the probe passes through the bottom of the sample tube moving along the movement path, the active end of the linkage structure is not stressed, and the sensor does not sense a change.

[0013] Preferably, the sensor transmits a signal to the main controller, and the main controller analyzes whether the bottom of the sample tube is broken and detached according to the sensor signal.

[0014] Preferably, a reset structure is included in the linkage structure, and the reset structure is located at the passive end of the linkage structure; the reset structure on the passive end is set as a counterweight.

[0015] Preferably, the analysis instrument includes a high-temperature digestion module, and the sample tube is processed in the high-temperature digestion module; the clamping module is located in the next operation process after the high-temperature digestion module; the probe is provided on the movement path for the sample tube to be transferred from the high-temperature digestion module to the clamping module and clamped in place.

[0016] Preferably, the linkage structure includes a hinge seat and a connecting rod.

[0017] Preferably, the hinge seat is fixed on the base, the middle of the connecting rod is hinged to the hinge seat, and the connecting rod forms a lever structure through the hinge seat.

[0018] Preferably, the active end of the connecting rod is fixedly connected to a probe, and the probe is located directly below the clamping position of the clamping module.

[0019] Preferably, it further includes a pressure sensing module for detecting the rupture of the side wall of the sample tube. The pressure sensing module is set as a pressure sensor, and the pressure sensor is arranged on two clamping surfaces of the clamping module.

[0020] Preferably, when the tube wall ruptures and is clamped, the pressure value of the pressure sensor is outside the pressure threshold range.

[0021] Preferably, when the tube wall does not rupture and is clamped, the pressure value of the pressure sensor is within the pressure threshold range.

[0022] Preferably, the pressure sensor transmits a signal to the main controller, and the main controller analyzes whether the tube wall of the sample tube ruptures according to the signal of the pressure sensor.

[0023] Preferably, the clamping module includes a base fixed on the installation base, and an electric gripper is fixedly arranged on the base. Clamping fingers are fixedly connected to two clamping ends of the electric gripper respectively.

[0024] Preferably, at least two screw holes are arranged on the passive end of the connecting rod.

[0025] Preferably, at least two pressure sensors are included in the pressure sensing module, and the at least two pressure sensors are vertically and evenly arranged on the clamping surfaces of the clamping fingers.

[0026] Preferably, the pressure sensing end face of the pressure sensor is flush with the clamping surface of the clamping finger.

[0027] Preferably, the analytical instrument further includes a sample tube collection bin and a three-axis motion module, and the bin opening of the sample tube collection bin is located on the motion path of the three-axis motion module.

[0028] Preferably, the control end of the three-axis motion module is connected to the main controller.

[0029] Preferably, when the bottom of the sample tube does not fall off, the sensor senses a change and sends a signal to the main controller, and the main controller does not control the three-axis motion module to move.

[0030] Preferably, when the bottom of the sample tube falls off, the sensor does not sense a change and sends a signal to the main controller, and the main controller controls the three-axis motion module to move, and the three-axis motion module corresponds to the position of the bin opening of the sample tube collection bin.

[0031] The technical solution of the present application has at least the following advantages and beneficial effects: In the present invention, after the high-temperature digestion process of the full-automatic total phosphorus and total nitrogen analysis, a sample tube rupture device is provided to detect the sample tube in a timely manner, especially the rupture of the flat-bottom sample tube, reducing the occurrence of the situation that the flat bottom of the flat-bottom sample tube is easily detached due to thermal stress after high-temperature digestion. Among them, during the process of clamping and adding the chromogenic reagent to the sample tube after digestion, a linkage structure and a photoelectric sensor below it are arranged at the bottom of the clamping module. When the sample tube is vertically placed into the clamping module, the probe on the active end of the linkage structure is squeezed, driving the linkage structure to act and trigger the photoelectric sensor, thereby judging whether the flat bottom of the sample tube has fallen off. When the flat bottom of the sample tube has not fallen off, the sample tube smoothly presses down the probe, causing the linkage structure to trigger the photoelectric sensor to send a signal to the display terminal and the alarm light, prompting the staff that the bottom of the sample tube is intact. When the flat bottom of the sample tube has fallen off, the sample tube cannot press down the probe, and the photoelectric sensor triggers different signals to be sent, causing the display terminal and the alarm light to receive the signal to prompt the staff that the bottom of the sample tube is damaged. Then, the damaged sample tube is quickly transported to the sample collection bin by the three-axis motion module for collection, reducing the damage to the full-automatic total phosphorus and total nitrogen analysis equipment caused by the damaged sample tube.

[0032] In the present invention, multiple pressure sensors arranged vertically and symmetrically horizontally are also provided at the clamping part of the clamping assembly to detect the clamping pressure on the side wall of the clamped sample tube. When the side wall of the sample tube is damaged, the pressure value of the corresponding pressure sensor will exceed the safety pressure threshold and be received by the main controller. The main controller will then send a signal to the display terminal and the alarm light to prompt the staff that the side wall of the sample tube is damaged. Then, the damaged sample tube is quickly transported to the sample collection bin by the three-axis motion module for collection. The multiple pressure sensors distributed symmetrically and arranged vertically can work together during the detection process to reduce the detection error of the pressure sensor and improve the accuracy of detecting the rupture of the side wall of the sample tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a front view structural schematic diagram of the present invention.

[0034] Figure 2 It is a structural schematic diagram of the present invention.

[0035] Figure 3 It is a top view structural schematic diagram of the full-automatic total phosphorus and total nitrogen analyzer.

[0036] Figure 4 It is a sectional structural schematic diagram of the present invention.

[0037] Figure 5 It is a structural schematic diagram of another angle of the present invention.

[0038] In the figure: 1 - High-temperature digestion module, 2 - Sample rack, 3 - Three-axis motion module, 4 - Colorimetric detection module, 5 - Clamping module, 501 - Electric gripper, 502 - Gripper finger, 503 - Base, 6 - Sample tube collection bin, 7 - Sample tube rupture analysis device, 701 - Probe, 702 - Link, 703 - Hinge seat, 704 - Screw, 705 - Photoelectric sensor, 706 - Pressure sensing module. Detailed implementation manner

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. If terms such as "center", "upper", "lower", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use, it is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application. It should also be noted that unless otherwise clearly specified and limited, if terms such as "set", "installed", "connected" are understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0041] In the prior art, for the analysis and detection of water samples in sample tubes, it is basically analyzed and detected by a total phosphorus and total nitrogen analyzer. And the fully automatic total phosphorus and total nitrogen analyzer mainly includes a high-temperature digestion module 1, a sample rack 2, a three-axis motion module 3 (XYZ three-axis direction motion module), a rotating gripper module, a clamping module 5, an injection module, and a colorimetric detection module 4 (please refer to Figure 3 ). And the above various modules are all arranged on the tabletop of the installation base.

[0042] Among them, both the injection module and the rotating gripper module are arranged on the vertical motion module of the three-axis motion module 3; the injection module is set as a liquid pipe and a liquid pump, and the liquid pump pumps liquid into the liquid pipe. The three-axis motion module 3 is set as a three-axis linear module or a three-axis robot to realize the transportation of the sample tube in three axial directions.

[0043] The working process is as follows: During the detection of total phosphorus and total nitrogen in the water sample, each sample tube sealed with the water sample to be detected is placed on the sample rack 2. The three-axis motion module 3 works first, clamps out the sample tube on the sample rack 2, and transports the sample tube to the high-temperature digestion module 1 for high-temperature and high-pressure digestion. After the digestion is completed, the three-axis motion module 3 clamps out the sample tube again and transports it to the clamping module 5 to be clamped and fixed. After the sample tube cools down, the rotating gripper module on the three-axis motion module 3 grips the sealing tube cap at the top of the sample tube and rotates to unscrew the sealing tube cap. Then, the three-axis motion module 3 inserts the liquid pipe on the vertical motion module into the sample tube, injects the color-developing reagent, and then uses the rotating gripper assembly to tighten the sealing tube cap on the sample tube for sealing. Then, it clamps out the sample tube and uses the rotating gripper module to rotate it repeatedly for oscillating and shaking. After shaking evenly, it is transported to the colorimetric detection module 4 for absorbance detection to obtain the detection concentration of total phosphorus and total nitrogen in the water sample.

[0044] Embodiment 1 During the detection of total phosphorus and total nitrogen in the water sample, the situation where the sample tube is damaged most easily occurs during the process of transporting the sample tube to the clamping module 5 for clamping after high-temperature and high-pressure digestion. Therefore, a sample tube rupture analysis device 7 is arranged at a position on the installation base near the clamping module 5 to detect whether the sample tube clamped on the clamping module 5 is damaged and collect the damaged sample tube.

[0045] Please refer to Figures 1 - 5 , the present invention provides a sample tube rupture analysis device 7, including a linkage structure, a photoelectric sensor 705, and a pressure sensing module 706.

[0046] Among them, since the sample tube rupture analysis device 7 needs to be arranged in cooperation with the clamping module 5 to detect the sample tube, the clamping module 5 includes a base 503, an electric gripper 501 is fixedly arranged on the base 503, and a gripper finger 502 is fixedly connected to the clamping end of the electric gripper 501. When the electric gripper 501 works, the two gripper fingers 502 are relatively closed to grip the side wall of the transported sample tube for clamping and fixing.

[0047] The probe 701 is connected to the active end of the linkage structure, and the passive end of the linkage structure is separated from or contacts the sensor according to the force condition of the active end.

[0048] In the present invention, the sensor can be a photoelectric sensor 705, a pressure sensor, etc. In this embodiment, the photoelectric sensor 705 is taken as an example for description.

[0049] The probe 701 is located directly below the clamping position of the gripper fingers 502; when the three-axis motion module 3 transports the sample tube to the clamping position of the gripper fingers 502, the vertical motion module drives the sample tube to vertically extend into the gripper fingers 502 (facilitating the middle position of the side wall of the sample tube to move into the gripper fingers 502 for uniform clamping). The flat bottom of the sample tube will touch and press the probe 701 below, causing the probe 701 to displace. The photoelectric sensor 705 is fixedly arranged on the base 503, below the passive end of the linkage structure. The displacement of the probe 701 will cause the passive end of the linkage structure and the photoelectric sensor 705 to change from the contact state to the separated state (i.e., move out of the groove of the photoelectric sensor 705) through the linkage structure.

[0050] The photoelectric sensor 705 is electrically connected to the total controller. The photoelectric sensor 705 is electrically connected to the display terminal on the fully automatic total phosphorus and total nitrogen analyzer through a circuit. The total controller is electrically connected to the alarm light. The display terminal and the alarm light are both arranged on the installation base.

[0051] It should be noted that the photoelectric sensor 705 is set as a normally closed sensor in this embodiment. After the clamping module 5 is started, the photoelectric sensor 705 and the total controller also enter the working mode; when the clamping module 5 completes clamping, the total controller will start to detect the signal of the photoelectric sensor 705 received at this time.

[0052] When the bottom of the sample tube falls off, it has no flat bottom. The probe 701 extends into the bottomless tube during the downward movement of the sample tube, and the probe 701 displaces. The active end of the linkage structure is not stressed and remains stationary, so that the groove of the photoelectric sensor 705 is always blocked (contact state), the infrared light is blocked, and the photoelectric sensor 705 outputs a normally closed signal. When the total controller receives the normally closed signal at this time, it determines that the sample tube is broken and starts to control the work.

[0053] When the bottom of the sample tube is intact, its flat bottom touches and presses the probe 701, causing the probe 701 to displace. The active end of the linkage structure is stressed and starts to act, so that the groove of the photoelectric sensor 705 changes from the blocked state to the unblocked state (separated state), the infrared light is no longer blocked, and the photoelectric sensor 705 changes from outputting a normally closed signal to outputting a normally open signal. When the total controller receives the normally open signal at this time, it determines that the sample tube is intact and does not perform control work.

[0054] After the photoelectric sensor 705 emits a signal, when the display terminal receives the normally closed signal, it will display that the sample tube is broken at the display port, and when it receives the normally open signal, it will display that the sample tube is intact at the display port; when the total controller receives the normally closed signal, it controls the alarm light to emit a beeping alarm light, and when the total controller receives the normally open signal, it does not perform control work.

[0055] Therefore, by controlling the induction signal emitted by the optoelectronic sensor 705 through different displacement states of the probe 701, it is possible to quickly display on the display terminal whether the flat bottom of the clamped sample tube is broken for the staff, and emit an alarm light to timely remind the staff.

[0056] The main controller is also connected to the control end of the three-axis motion module 3 through a circuit. When the flat bottom of the sample tube is not damaged, the probe 701 touches the flat bottom and displaces. At this time, the main controller does not send a control signal to the three-axis motion module 3, and the three-axis motion module 3 continues to work according to the motion line of the normal total phosphorus and total nitrogen analysis process of the water sample; when the flat bottom of the sample tube is damaged, the probe 701 does not touch the flat bottom and does not displace. At this time, the main controller sends a control signal to the three-axis motion module 3. After receiving the control signal, the three-axis motion module 3 clamps and removes the damaged sample tube in the clamping and removing module 5, and then transports the sample tube to the opening of the sample tube collection bin 6 fixedly arranged on the installation base, puts the damaged sample tube into it for collection, and then the three-axis motion module 3 returns to the initial position to re-perform the total phosphorus and total nitrogen analysis process of the new sample tube.

[0057] It should be noted that the linkage structure also includes a reset structure. When the process of clamping the sample tube is not performed, the passive end of the linkage structure is subjected to the acting force in the reset direction of the reset structure, is located inside the optoelectronic sensor 705, and contacts the optoelectronic sensor 705; when clamping an undamaged sample tube, the flat bottom of the sample tube presses the probe 701 downward against the reset action of the reset structure, so that the probe 701 displaces. When the sample tube is separated from the clamping module 5, the squeezed probe 701 will be reset under the acting force of the reset structure, which is convenient for the next detection of the rupture of the sample tube.

[0058] Furthermore, the probe 701, the linkage structure and the optoelectronic sensor 705 cooperate to work, and can quickly detect whether the flat bottom of the sample tube has fallen off. However, if there are special rupture situations, such as partial rupture of the side wall of the sample tube or fragmentation of the upper half of the sample tube, it will still leak liquid and affect the equipment. It is difficult to detect only by the probe 701 and the optoelectronic sensor 705. Therefore, it is necessary to set up a component for detecting the damage of the side of the sample tube.

[0059] Specifically, please refer to Figure 5 , on the clamping part of the clamping module 5, that is, on the opposite clamping surfaces of the two jaw fingers 502, pressure sensing modules 706 are fixedly arranged respectively. When the jaw fingers 502 clamp the sample tube, the side wall of the sample tube will contact and exert pressure on the pressure sensing modules 706 on the clamping surfaces, and the pressure value of the pressure sensor is used to judge whether the tube wall of the sample tube is broken.

[0060] Among them, when the complete sample tube is clamped, since the side wall is uniformly subjected to the clamping force of the clamping jaw fingers 502, the readings of the pressure sensors should show uniform values. If the side wall is cracked, due to the decrease in the structural strength at the crack, it is prone to deformation under the clamping force, resulting in abnormal readings of the sensors near this area. The pressure on the non-cracked side of the symmetric side will increase compensatorily due to the deformation on the other side, causing the pressure sensor values at the cracked area to change. If a large area of the side wall falls off (i.e., the upper half of the sample tube is broken), the pressure change is easier to capture. At this time, the clamping jaw fingers 502 that hold the upper half of the sample tube do not hold the tube wall, so there is no pressure value for the pressure sensor near this area.

[0061] Specifically, in order to detect the rupture of the entire tube wall of the sample tube, at least two pressure sensors are included in the pressure sensing module 706. The at least two pressure sensors are vertically arranged evenly on the clamping jaw fingers 502, so that after the clamping jaw fingers 502 clamp the tube wall of the sample tube, the vertically arranged pressure sensors can be evenly distributed on the clamped tube wall of the sample tube to detect the pressure values at various positions of the tube wall. The pressure sensors are fixedly installed on the mounting plate, and the mounting plate is fixedly installed on the clamping surface of the clamping jaw fingers 502. There are grooves on the clamping surface, and the mounting plate is embedded in the grooves, so that the pressure sensing ends of the respective pressure sensors are flush with the clamping surface of the clamping jaw fingers 502, avoiding the protrusion of the pressure sensors and affecting the clamping work of the clamping module 5. Each pressure sensor is respectively connected to the main controller through a circuit to send a pressure signal to the main controller.

[0062] After the clamping jaw fingers 502 clamp the tube wall of the sample tube, the pressure sensing module 706 starts to work. When the tube wall of the sample tube is intact, the values of the respective pressure sensors in contact with the sample tube are all within the range of uniform pressure values. At this time, the pressure value is within the set safe pressure threshold range. The main controller receives the safe pressure signals from the respective pressure sensors and does not send a control signal. The three-axis motion module 3 operates according to the motion route of the normal total phosphorus and total nitrogen analysis process of the water sample.

[0063] When the tube wall of the sample tube is partially cracked, after clamping, the pressure value generated by the pressure sensor near the crack will be too large or too small (when the tube wall is cracked, if the crack edge does not protrude, when the cracked area of the tube wall contacts the pressure sensor, the contact area decreases, resulting in a smaller overall pressure during clamping; if the crack edge protrudes outward, when the protruding part of the cracked tube wall contacts the pressure sensor, the contact pressure during clamping will be larger). Thus, it is outside the set pressure safety threshold range. After this pressure signal is transmitted to the main controller, the main controller will send a signal to the three-axis motion module 3. The three-axis motion module 3 will then put the damaged sample tube into the sample tube collection bin 6 for collection, and then the three-axis motion module 3 resets.

[0064] When the entire upper half of the sample tube wall is broken, the pressure sensor located at the upper half cannot contact the wall of the sample tube after clamping, and cannot generate a pressure value, so the pressure is within a range lower than the set pressure safety threshold. After the pressure signal is transmitted to the main controller, the main controller will send a signal to the three-axis motion module 3, and the three-axis motion module 3 will place the broken sample tube into the sample tube collection chamber 6 for collection, and then the three-axis motion module 3 will be reset.

[0065] It is worth noting that in some embodiments, the two gripper fingers 502 can be configured as two planar clamping plates, or the two gripper fingers 502 can collectively form an annular clamping block. Pressure sensing modules 706 can be provided on each gripper finger. These pressure sensing modules can be distributed circumferentially around the annular clamping block-shaped gripper fingers 502 to capture circumferential pressure differences within the sample tube. These modules interact with the multiple vertically arranged pressure sensors to reduce pressure sensor detection errors and improve crack detection accuracy. When an annular clamping block is used, the diameter of the annular clamping block should be smaller than the diameter of the sample tube.

[0066] It is worth noting that the detection of the flat bottom of the sample tube falling off by the probe 701 and the photoelectric sensor 705 is located before the clamping module 5 is fully clamped (i.e., the process in which the three-axis motion module 3 drives the sample tube to vertically extend into the clamping module 5), while the detection of the side wall of the sample tube breaking by the pressure sensing module 706 is located after the clamping module 5 is fully clamped (after clamping, the sample tube can apply a stable pressure value to the pressure sensor). Therefore, the main controller will give priority to judging whether the flat bottom of the sample tube has fallen off. If it has fallen off, it will be directly transported to the sample tube collection chamber 6 without further detection process. Only when the flat bottom has not fallen off will it continue to judge whether the wall of the sample tube is broken after clamping. Through graded detection, the sample tube can be quickly analyzed and tested for damage, saving process time.

[0067] Example 2 Please refer to Figure 1 , Figure 2 and Figure 4 In this embodiment, in order to achieve continuous detection, the linkage structure includes an articulated seat 703 and a connecting rod 702.

[0068] Specifically, the articulated seat 703 is fixed on the base 503, and the articulated seat 703 is hingedly connected to the middle part of the connecting rod 702 to form a lever structure. One end of the connecting rod 702 serves as the active end to connect the vertically arranged probe 701, and the other end is the passive end for contacting the photoelectric sensor 705.

[0069] The passive end of the connecting rod 702 is provided with a counterweight as the above-mentioned reset structure. When the probe 701 is not subjected to external force, the passive end is always affected by the counterweight, so that the probe 701 is in a tilted state relative to the passive end, and quickly contacts the downward-moving sample tube.

[0070] In a specific embodiment, the counterweight is a screw 704, and a threaded hole is provided at the passive end of the connecting rod 702, and the screw 704 is threadedly connected to the threaded hole.

[0071] When the clamping module 5 clamps sample tubes of different models (i.e., sample tubes of different lengths), the vertical offset distance of the probe 701 is also different. If the photoelectric sensor 705 is arranged below the probe 701 and directly senses the probe 701, the long sample tube cannot be placed in place in the jaw fingers 502. Therefore, in this embodiment, the photoelectric sensor 705 on the base 503 is located below the passive end of the connecting rod 702.

[0072] In the standby state (i.e., when the clamping process is not performed), the passive end of the connecting rod 702 swings downward under the weight of the screw 704 and contacts the photoelectric sensor 705 on the base 503, making the photoelectric sensor 705 in a long-term trigger state. At this time, the photoelectric sensor 705 continuously sends the same signal to the main controller, and the main controller does not send a signal.

[0073] During the process of the three-axis motion module 3 transporting the sample tube to the clamping module 5 for clamping, when the flat bottom of the sample tube has not fallen off, the descending sample tube abuts against the probe 701 for a pressing action, and the threaded hole end starts to shift upward through the lever structure and gradually moves away from the photoelectric sensor 705; when the sample tube descends to the clamping position, the threaded hole end completely disengages from the photoelectric sensor 705, causing the signal sent by the photoelectric sensor 705 to the main controller to change. After the main controller receives the changed signal, it will send a signal to the display terminal and the alarm lamp to indicate that the flat bottom of the sample tube is not damaged. Then, the coloring reagent is normally added, and finally, it is removed from the clamping module 5. At this time, the sample tube moves upward, and the passive end of the connecting rod 702 will swing downward under the weight and contact the photoelectric sensor 705 again for long-term triggering, completing a complete detection.

[0074] During the process of the three-axis motion module 3 transporting the sample tube to the clamping module 5 for clamping, when the flat bottom of the sample tube has fallen off, due to the flat bottom detachment, the probe 701 extends into the tube, and the sample tube cannot press the probe 701. The passive end of the connecting rod 702 always contacts the photoelectric sensor 705; when the sample tube descends to the clamping position, the photoelectric sensor 705 is still in the triggered state. The main controller detects that the signal of the photoelectric sensor 705 has not changed, then judges that the flat bottom of the sample tube is damaged, and will send a signal to the display terminal and the alarm lamp to indicate that the flat bottom of the sample tube is damaged and emit an alarm light. Then, the three-axis motion module 3 directly transports the judged damaged sample tube to the sample tube collection bin 6.

[0075] It should be noted that, in some embodiments, the linkage structure can also be set as a microswitch structure, that is, it includes a reed that can be elastically reset and a contact for sensing signals. During the process of the sample tube moving downward and clamping, the flat bottom of the sample can contact the reed, causing the reed to bend downward and touch the contact. The contact sends a signal to the main controller, and the main controller sends a signal to indicate that the flat bottom of the sample tube has not fallen off.

[0076] So far, the embodiments of the present invention have been described in detail. To avoid obscuring the concept of the present invention, some details well known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions of the present invention according to the above description, and the scope of the present invention is defined by the appended claims.

Claims

1. A sample tube rupture analysis device, including a linkage structure, characterized in that: The active end of the linkage structure is connected with a probe (701), and the probe (701) is located directly below the clamping end of the clamping module (5) of the analysis instrument; A sensor is arranged below the passive end of the linkage structure; The probe (701) is located on the movement path of the sample tube. When the bottom of the sample tube does not fall off, the probe (701) contacts the bottom of the sample tube moving along the movement path, causing the active end of the linkage structure to be stressed. The passive end of the linkage structure moves, and the sensor senses the change of the linkage structure; When the bottom of the sample tube falls off, the probe (701) passes through the bottom of the sample tube moving along the movement path, the active end of the linkage structure is not stressed, and the sensor senses that the linkage structure does not change; The sensor transmits a signal to the main controller, and the main controller analyzes whether the bottom of the sample tube is ruptured and fallen off according to the sensor signal.

2. The sample tube rupture analysis device according to claim 1, wherein, The linkage structure includes a reset structure, and the reset structure is located at the passive end of the linkage structure; the reset structure on the passive end is set as a counterweight.

3. A sample tube rupture analysis device according to any one of claims 1-2, characterized in that, The analysis instrument includes a high-temperature digestion module, and the sample tube is processed in the high-temperature digestion module (1); the clamping module (5) is located in the next operation process after the high-temperature digestion module (1) processes; the probe (701) is arranged on the movement path where the sample tube is transferred from the high-temperature digestion module (1) to the clamping module (5) and clamped in place.

4. A sample tube rupture analysis device according to any one of claims 1-2, characterized in that, The linkage structure includes a hinge seat (703) and a connecting rod (702); The hinge seat (703) is fixed on the base (503), and the middle part of the connecting rod (702) is hinged to the hinge seat (703). The connecting rod (702) forms a lever structure through the hinge seat (703); The active end of the connecting rod (702) is fixedly connected with the probe (701), and the probe (701) is located directly below the clamping position of the clamping module (5).

5. A sample tube rupture analysis device according to any one of claims 1-2, characterized in that, It also includes a pressure sensing module (706) for detecting the rupture of the side wall of the sample tube. The pressure sensing module (706) is set as a pressure sensor, and the pressure sensor is arranged on the two clamping surfaces of the clamping module (5); When the tube wall is ruptured and clamped, the pressure value of the pressure sensor is outside the pressure threshold range; When the tube wall is not ruptured and clamped, the pressure value of the pressure sensor is within the pressure threshold range; The pressure sensor transmits a signal to the main controller, and the main controller analyzes whether the tube wall of the sample tube is ruptured according to the pressure sensor signal.

6. The sample tube rupture analysis device according to claim 4, characterized in that, The clamping module (5) includes a base (503), the base (503) is fixed on the installation base, and an electric gripper (501) is fixedly arranged on the base (503). Claw fingers (502) are fixedly connected to the two clamping ends of the electric gripper (501) respectively.

7. An apparatus for analyzing the rupture of a sample tube according to claim 4, characterized in that, At least two screw holes are arranged on the passive end of the connecting rod (702).

8. The sample tube rupture analysis device according to claim 5, characterized in that, The pressure sensing module (706) includes at least two pressure sensors, and at least two pressure sensors are arranged vertically and evenly on the clamping surfaces of the claw fingers (502); The pressure sensing end surface of the pressure sensor is flush with the clamping surface of the claw finger (502).

9. The sample tube rupture analysis device according to claim 3, characterized in that, The analytical instrument further includes a sample tube collection bin (6) and a three-axis motion module (3), and the bin opening of the sample tube collection bin (6) is located on the motion path of the three-axis motion module (3); The control end of the three-axis motion module (3) is connected to the master controller; When the bottom of the sample tube does not fall off, the sensor senses the change of the linkage structure and sends a signal to the master controller, and the master controller does not control the three-axis motion module (3) to move; When the bottom of the sample tube falls off, the sensor senses that the linkage structure has not changed, sends a signal to the master controller, and the master controller controls the three-axis motion module (3) to move, and the three-axis motion module (3) corresponds to the position of the bin opening of the sample tube collection bin (6).

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