Sample delivery system

Abstract

The present application relates to the technical field of sample conveying, in particular to a sample conveying system, comprising a conveying belt, a sample feeding device and a blocking and limiting mechanism, the conveying belt is suitable for conveying a sample rack; the sample feeding device is arranged on the side of the conveying belt and is suitable for controlling the sample feeding speed of the sample rack on the conveying belt; the blocking and limiting mechanism is arranged on the side of the conveying belt and is located upstream and / or downstream of the sample feeding device along the conveying direction of the conveying belt, and has a blocking position for blocking the movement of the sample rack and a release position for releasing the movement of the sample rack. The sample conveying system ensures the uninterrupted operation of the sample suction position corresponding to the sample suction device through the sample feeding device and the blocking and limiting mechanism, and improves the detection efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sample conveying, in particular to a sample conveying system. BACKGROUND

[0002] In the field of in-vitro diagnostic analysis equipment, most diagnostic equipment (such as biochemical analyzers, blood analyzers, chemiluminescence immunoassay analyzers, urine analyzers, enzyme labelers, urine sediment analyzers, etc.) adopts a sample conveying system to realize automatic sample feeding.

[0003] The sample is usually carried by a sample rack and batch-transferred by a conveying belt of the sample conveying system to a sample suction position where a sample suction device is located. After being sucked by the sample suction device, the sample is detected and analyzed. However, when too many sample racks enter the sample suction position, the sample racks that have not entered the sample suction position at the detection front end are still driven by the conveying belt to move towards the sample suction position, causing the sample racks at the sample suction position to be crowded and collided, affecting the normal detection and analysis of the sample. At this time, manual or baffle blocking is required to block the movement of the sample racks, and after the sample detection at the sample suction position is completed, the sample racks are released. However, this operation mode causes the released sample racks to be unable to move to the sample suction position in time, causing the sample suction position operation to be stalled for a period of time, affecting the detection efficiency. SUMMARY

[0004] Therefore, the technical problem to be solved by the present application is to overcome the defects in the prior art that the sample racks cannot move to the sample suction position in time after being released, affecting the detection efficiency, so as to provide a sample conveying system capable of controlling the sample feeding speed and ensuring the normal detection and analysis of the sample.

[0005] To solve the above technical problems, the present application provides a sample conveying system, comprising a conveying belt, a sample feeding device and a blocking and limiting mechanism. The conveying belt is suitable for conveying sample racks. The sample feeding device is arranged on the side of the conveying belt and is suitable for controlling the sample feeding speed of the sample racks on the conveying belt. The blocking and limiting mechanism is arranged on the side of the conveying belt and is located upstream and / or downstream of the sample feeding device along the conveying direction of the conveying belt, and has a blocking position for blocking the movement of the sample racks and a release position for releasing the movement of the sample racks.

[0006] The sample conveying system provided by the present application further comprises an automatic rail changing device, which comprises a rail changing channel and a rail changing driving structure. The conveying belt has at least two parallel conveying belts. The automatic rail changing device is located at one end of the conveying belt along the conveying direction of the conveying belt. The rail changing channel is suitable for being communicated with different conveying belts under the driving of the rail changing driving structure.

[0007] The sample conveying system provided by the application further comprises a rack and a baffle; the baffle is connected to the rack and is located on both sides of the conveying belt and forms a conveying guide groove with the conveying belt, the conveying guide groove having an upward opening; the sample feeding device and the blocking and limiting mechanism are both arranged on the rack and are located outside the conveying guide groove.

[0008] The sample conveying system provided by the application further comprises a rack and a baffle; the baffle is connected to the rack and is located on both sides of the conveying belt and forms a conveying guide groove with the conveying belt, the conveying guide groove having an upward opening; the sample feeding device and the blocking and limiting mechanism are both arranged on the rack and are located outside the conveying guide groove.

[0009] The sample conveying system provided by the application further comprises a rack and a baffle; the baffle is connected to the rack and is located on both sides of the conveying belt and forms a conveying guide groove with the conveying belt, the conveying guide groove having an upward opening; the sample feeding device and the blocking and limiting mechanism are both arranged on the rack and are located outside the conveying guide groove.

[0010] The sample conveying system provided by the application further comprises a rack and a baffle; the baffle is connected to the rack and is located on both sides of the conveying belt and forms a conveying guide groove with the conveying belt, the conveying guide groove having an upward opening; the sample feeding device and the blocking and limiting mechanism are both arranged on the rack and are located outside the conveying guide groove.

[0011] The sample delivery system provided by the application is characterized in that a variable-rail detection switch is arranged on the variable-rail channel; when the third sample rack detection switch is triggered and the variable-rail channel is not in communication with the current sample suction delivery belt, the second blocking limiting mechanism is in the blocking position; when the third sample rack detection switch is triggered and the variable-rail channel is in communication with the current sample suction delivery belt, the second blocking limiting mechanism is in the release position.

[0012] The sample delivery system provided by the application is characterized in that a blocking mechanism is arranged on one end of the variable-rail channel away from the delivery belt, and is suitable for blocking the one end of the variable-rail channel away from the delivery belt; when the variable-rail channel is in communication with the current sample suction delivery belt, the blocking mechanism blocks the one end of the variable-rail channel away from the delivery belt.

[0013] The sample delivery system provided by the application is characterized in that at least two sample suction delivery belts are arranged; when the variable-rail channel is moved to be in communication with a target sample suction delivery belt and the variable-rail detection switch is triggered, if the third sample rack detection switch of the target sample suction delivery belt is not triggered, the second blocking limiting mechanism of the target sample suction delivery belt is in the release position; if the third sample rack detection switch of the target sample suction delivery belt is triggered, the second blocking limiting mechanism of the target sample suction delivery belt is in the blocking position.

[0014] The sample delivery system provided by the application is characterized in that a first limiting long hole extending in the conveying direction of the sample suction delivery belt is arranged on the baffle plate on the side of the sample suction delivery belt; the sample feeding device comprises a base, a linear driving mechanism and a pushing piece mechanism; the base is arranged on the rack and located outside the conveying guide groove surrounded by the sample suction delivery belt; the linear driving mechanism is arranged on the base; the pushing piece mechanism is suitable for abutting against the sample rack through the first limiting long hole, and the linear driving mechanism is in transmission connection with the pushing piece mechanism to drive the pushing piece mechanism to move back and forth in the conveying direction of the sample suction delivery belt.

[0015] The sample delivery system provided by the application is characterized in that two sample suction delivery belts are arranged, and the conveying directions of the two sample suction delivery belts are consistent.

[0016] The sample delivery system provided by the application is characterized in that at least one of the delivery belts is a return delivery belt, the conveying direction of the return delivery belt is opposite to the conveying direction of the sample suction delivery belt; a fourth sample rack detection switch is arranged on one end of the return delivery belt close to the automatic variable-rail device; when the variable-rail channel is in communication with the return delivery belt, the fourth sample rack detection switch is triggered, and the variable-rail detection switch is not triggered, the variable-rail channel can be moved to the initial position.

[0017] The sample conveying system provided by the application, the baffle is provided with a second limiting long hole extending along the conveying direction of the return conveying belt; the end of the return conveying belt away from the automatic rail changing device is provided with a blocking and advancing device, the blocking and advancing device comprises a blocking and advancing seat, a blocking and driving mechanism and a blocking and advancing plate; the blocking and advancing seat is arranged on the rack and located outside the conveying guide groove surrounded by the return conveying belt; the blocking and driving mechanism is arranged on the blocking and advancing seat; one end of the blocking and advancing plate is movably connected with the blocking and advancing seat, and the other end has a blocking and advancing position extending on the return conveying belt through the second limiting long hole and a separation position away from the return conveying belt; the blocking and driving mechanism is in transmission connection with the blocking and advancing plate to drive the blocking and advancing plate to reciprocally move along the conveying direction of the return conveying belt.

[0018] The sample conveying system provided by the application, the blocking and advancing device and the fourth sample rack detection switch are provided with a fifth sample rack detection switch and a third blocking and limiting mechanism, the fifth sample rack detection switch is arranged close to the blocking and advancing device; when the fourth sample rack detection switch is triggered, the fifth sample rack detection switch is not triggered, and the third blocking and limiting mechanism is in the release position when the blocking and advancing device is in the blocking and advancing position; when the fifth sample rack detection switch is triggered, if the downstream unit connected with the return conveying belt is not in communication with the return conveying belt, the blocking and advancing plate is in the blocking and advancing position to block the movement front end of the sample rack; when the fifth sample rack detection switch is triggered, if the downstream unit connected with the return conveying belt is in communication with the return conveying belt, the blocking and advancing plate is first in the separation position for a preset time, and then the blocking and advancing plate is in the blocking and advancing position and pushes the sample rack to the movement end.

[0019] The technical scheme of the application has the following advantages:

[0020] 1. The sample conveying system provided by the application comprises a sample feeding device arranged on the side of the conveying belt and adapted to control the sample feeding speed of the sample rack on the conveying belt, so as to avoid too many sample racks from rushing into the sample suction position corresponding to the sample suction device due to too fast sample feeding speed, and to keep the sample rack moving towards the sample suction position for sample feeding, thereby ensuring uninterrupted operation of the sample suction position and improving detection efficiency. The sample conveying system further comprises a blocking and limiting mechanism located upstream and / or downstream of the sample feeding device. When it is necessary to block and limit the sample rack entering and / or leaving the sample suction position, the blocking and limiting mechanism can block and limit the sample rack upstream and / or downstream of the sample feeding device, thereby buffering the sample rack, further avoiding congestion and collision of the sample rack in the sample suction position, slowing down the movement speed of the sample rack, preventing the sample in the sample rack from being spilled due to inertia when the sample feeding speed is suddenly adjusted by the sample feeding device due to too fast conveying speed, and ensuring normal sample suction and detection and analysis operation of the sample. When it is necessary to release the sample rack for passing, the blocking and limiting mechanism does not block the sample rack, so that the sample rack can be normally conveyed. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the application or the technical solutions in the prior art, the drawings needed in the following description of the specific embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0022] Figure 1 FIG. 1 is a schematic view of the sample conveying system provided by the application;

[0023] Figure 2 FIG. 2 is an enlarged view of part A of FIG. 1; Figure 1

[0024] Figure 3 FIG. 3 is an enlarged view of part B of FIG. 1; Figure 1

[0025] Figure 4 FIG. 4 is an enlarged view of part C of FIG. 1; Figure 1

[0026] Figure 5 FIG. 5 is a top view of the sample conveying system provided by the application;

[0027] Figure 6 FIG. 6 is an enlarged view of part D of FIG. 5; Figure 5

[0028] Figure 7 FIG. 7 is an enlarged view of part E of FIG. 5; Figure 5

[0029] Figure 8 FIG. 8 is a schematic view of the automatic rail changing device provided by the application; ​​​​​

[0030] Figure 9 Partial view of the automatic track changing device provided by the present application Figure 1 ;

[0031] Figure 10 Partial view of the automatic track changing device provided by the present application Figure 2 ;

[0032] Figure 11 Partial view of the automatic track changing device provided by the present application Figure 3 ;

[0033] Figure 12 Partial view of the sample delivery system provided by the present application

[0034] Figure 13 Overall structure schematic view of the blocking limiting mechanism in the blocking position provided by the present application

[0035] Figure 14 Split structure schematic view of the blocking limiting mechanism provided by the present application

[0036] Figure 15 Overall structure schematic view of the blocking limiting mechanism in the release position provided by the present application

[0037] Figure 16 Overall structure schematic view of the sample injection device provided by the present application

[0038] Figure 17 Top view of the sample injection device provided by the present application

[0039] Figure 18 Split structure schematic view of the sample injection device provided by the present application

[0040] Figure 19 Split structure schematic view of the pushing material pushing piece mechanism provided by the present application

[0041] Explanation of reference signs:

[0042] 100, sample holder; 201, sample suction conveying belt; 202, return conveying belt; 203, automatic rail changing device; 204, machine frame; 205, baffle; 2051, limiting opening; 2052, first limiting long hole; 206, first sample holder detection switch; 207, first blocking limiting mechanism; 208, second sample holder detection switch; 209, second blocking limiting mechanism; 210, third sample holder detection switch; 211, fourth sample holder detection switch; 212, fifth sample holder detection switch; 213, third blocking limiting mechanism; 214, sample feeding device; 215, blocking pushing device; 301, rail changing installation base plate; 302, rail changing guide rail; 303, rail changing driving structure; 3031, rail changing motor; 3032, rail changing screw; 3033, nut detection optocoupler; 3034, bearing; 3035, bearing seat; 304, rail changing channel; 305, blocking mechanism; 3051, reversing installation plate; 3052, reversing blocking piece; 3053, reversing slide; 3054, reversing sliding block; 3055, reversing driving assembly; 30551, reversing motor; 30552, reversing gear; 30553, reversing rack; 306, rail changing sliding block; 307, rail changing detection switch; 308, return channel; 309, return support seat; 3010, return reset structure; 30101, return elastic member; 30102, return baffle; 30103, return slide rod; 3011, return sliding block; 401, installation frame; 4011, side connecting part; 4012, connecting plate; 402, limiting driving assembly; 4021, driving part; 4022, transmission wheel; 4023, follow-up shaft; 4024, sliding groove; 403, limiting baffle; 4031, blocking piece; 40311, plug-in part; 4032, limiting swing arm; 4033, pivot; 404, position detection assembly; 4041, first detection switch; 4042, second detection switch; 4043, detection plate; 4044, switch mounting seat; 501, base; 502, linear driving mechanism; 5021, driving part; 5022, driving pulley; 5023, driven pulley; 5024, transmission belt; 503, material pushing piece mechanism; 5031, bottom plate; 50311, installation groove; 5032, rotation connecting plate; 5033, pushing piece; 5034, pressing plate; 5035, elastic reset member; 5036, pivot; 504, reset mechanism; 5041, fixed seat; 5042, fixed shaft; 5043, reset bearing; 505, connecting seat; 506, guide structure; 507, detection assembly; 5071, third detection switch; 5072, fourth detection switch; 5073, sample feeding detection plate; 601, blocking pushing seat; 602, blocking driving mechanism; 603, blocking pushing plate. DETAILED DESCRIPTION

[0043] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present application.

[0044] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0046] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0047] As Figures 1 to 19 shown, a sample conveying system is disclosed in the embodiment, which comprises a conveying belt, a sample feeding device and a blocking and limiting mechanism. The conveying belt is suitable for conveying a sample rack 100. The sample feeding device is arranged on the side of the conveying belt and is suitable for controlling the sample feeding speed of the sample rack 100 on the conveying belt. The blocking and limiting mechanism is arranged on the side of the conveying belt and is located upstream and / or downstream of the sample feeding device along the conveying direction of the conveying belt, and has a blocking position for blocking the movement of the sample rack 100 and a release position for releasing the movement of the sample rack 100.

[0048] The sample injection device is arranged on the side of the conveying belt and is suitable for controlling the sample injection speed of the sample rack 100 on the conveying belt, so as to avoid too fast sample injection speed from causing too many sample racks 100 to rush into the sample suction position corresponding to the sample suction device, and to keep the sample racks 100 moving towards the sample suction position for sample injection, so as to ensure uninterrupted operation of the sample suction position and improve the detection efficiency. The blocking and limiting mechanism is located upstream and / or downstream of the sample injection device. When it is necessary to block and limit the sample racks 100 entering and / or leaving the sample suction position, the sample racks 100 can be blocked and limited upstream and / or downstream of the sample injection device, so as to buffer the sample racks 100, further avoid the sample racks 100 in the sample suction position from being crowded and collided, slow down the movement speed of the sample racks 100, prevent the samples in the sample racks 100 from being spilled due to inertia when the sample injection speed is suddenly adjusted by the sample injection device due to too fast conveying speed, and ensure normal sample suction and detection and analysis operation of the samples; when it is necessary to release the sample racks 100, the blocking and limiting mechanism will not block the sample racks 100, so that the sample racks 100 can be normally conveyed.

[0049] As shown in Figures 8 to 12 The sample conveying system of the embodiment further comprises an automatic rail changing device 203, which comprises a rail changing channel 304 and a rail changing driving structure 303; the conveying belt has at least two parallel conveying belts, and the automatic rail changing device 203 is located at one end of the conveying belt in the conveying direction of the conveying belt, and the rail changing channel 304 is suitable for being communicated with different conveying belts under the driving of the rail changing driving structure 303. The automatic rail changing device 203 realizes replacement of the sample racks 100 between different conveying belts, improves the inspection efficiency, improves the working intensity, fully utilizes the laboratory resources, and reduces the detection cost.

[0050] In the embodiment, the automatic rail changing device 203, the sample injection device and the blocking and limiting mechanism are arranged, so as to improve the scheduling efficiency of the sample racks 100 between the conveying belts, meet higher test speed and different types of tests.

[0051] Each conveying belt is provided with a group of sample injection devices and at least one group of blocking and limiting mechanisms.

[0052] The automatic rail changing device 203 provided by the embodiment further comprises a rail changing mounting base plate 301, a rail changing guide rail 302 and a blocking mechanism 305; the rail changing guide rail 302 is fixedly connected to the mounting base plate; a rail changing driving structure 303 is fixedly connected to the rail changing mounting base plate 301; a rail changing channel 304 is slidably connected to the rail changing guide rail 302 and connected to the power output end of the rail changing driving structure 303; the rail changing channel 304 has a first end and a second end at two ends thereof, and the first end is adapted to be matched to different conveying belts of a sample conveying system; the blocking mechanism 305 is connected to the rail changing channel 304 and adapted to block the second end of the rail changing channel 304.

[0053] The rail changing mounting base plate 301 can be fixedly connected to a rack 204 of the sample conveying system or fixedly connected between two groups of sample conveying systems; the rail changing channel 304 can slide along the rail changing guide rail 302 under the driving of the rail changing driving structure 303 to realize the matching between the first end of the rail changing channel 304 and different conveying belts of the sample conveying system; the blocking mechanism 305 is adapted to block the second end of the rail changing channel 304 to prevent the sample rack 100 from derailing from the second end of the rail changing channel 304 or from entering the conveying belt of the next group of sample conveying systems from the second end of the rail changing channel 304, so as to prevent the sample conveying from being failed; the sample conveying system of the embodiment also automatically realizes the replacement of the conveying belt of the sample rack 100, improves the inspection efficiency, improves the working strength, fully utilizes the laboratory resources and reduces the detection cost.

[0054] The automatic rail changing device 203 provided by the embodiment, the blocking mechanism 305 comprises a reversing mounting plate 3051 and a reversing blocking piece 3052, the reversing mounting plate 3051 is fixedly connected to the rail changing channel 304; the reversing blocking piece 3052 is movably connected to the reversing mounting plate 3051 and has a blocking position for blocking the second end of the rail changing channel 304 and a separation position away from the second end of the rail changing channel 304.

[0055] When the sample rack 100 needs to be changed in rail, the reversing blocking piece 3052 can be moved to the blocking position to block the second end, so as to prevent the sample rack 100 entering the rail changing channel 304 from derailing from the second end or entering the conveying belt of the next group of sample conveying systems from the second end. When the sample rack 100 does not need to be changed in rail, the reversing blocking piece 3052 can be moved to the separation position to open the second end, so that the reversing blocking piece 3052 does not block the sample rack 100, and the sample rack 100 can be disassembled and separated through the second end or enter the conveying belt of the next group of sample conveying systems through the second end.

[0056] In the embodiment, the blocking mechanism 305 further comprises a reversing slide 3053, a reversing slider 3054 and a reversing drive assembly 3055; the reversing slide 3053 is fixedly arranged on the reversing mounting plate 3051; the reversing slider 3054 is in sliding connection with the reversing slide 3053 and is fixedly connected with the reversing blocking piece 3052; the reversing drive assembly 3055 is fixedly arranged on the reversing mounting plate 3051, and a power output end is connected with the reversing slider 3054.

[0057] The reversing slider 3054 is in sliding connection with the reversing slide 3053, so as to realize sliding on the reversing mounting plate 3051 and drive the reversing blocking piece 3052 to slide on the reversing mounting plate 3051, so as to realize switching of the reversing blocking piece 3052 between the blocking position and the separation position; the reversing slide 3053 limits and guides the movement of the reversing slider 3054 and the reversing blocking piece 3052; and the reversing slider 3054 is automatically switched between the blocking position and the separation position under the driving of the reversing drive assembly 3055.

[0058] In the specific embodiment, the reversing slider 3054 is provided with a reversing sliding groove 4024, the reversing slide 3053 is a reversing slide bar protruding on the reversing mounting plate 3051, and the reversing slider 3054 is in sliding cooperation with the reversing slide 3053 through the reversing sliding groove 4024. Preferably, the reversing slide bar is a strip structure with a trapezoidal cross section, and the reversing sliding groove 4024 is a dovetail groove matched with the reversing slide bar.

[0059] Specifically, the reversing blocking piece 3052 can be automatically switched between the blocking position and the separation position under the driving of the reversing drive assembly 3055, or the reversing drive assembly 3055 can not be provided, and the reversing slider 3054 and the reversing blocking piece 3052 are manually adjusted.

[0060] The sample delivery system of the embodiment, the reversing drive assembly 3055 comprises a reversing motor 30551 and a reversing rack 30553; an outer shaft of a power output end of the reversing motor 30551 is provided with a reversing gear 30552; the reversing rack 30553 is arranged on the reversing slider 3054 and is in engagement with the reversing gear 30552. The reversing rack 30553 and the reversing gear 30552 are simple in structure and accurate in cooperation.

[0061] As a convertible embodiment, the reversing drive assembly 3055 comprises an electric telescopic rod, the electric telescopic rod is connected with the reversing slider 3054, and drives the reversing slider 3054 to slide along the reversing slide 3053.

[0062] The sample conveying system of the embodiment further comprises a variable-rail sliding block 306, which is in sliding connection with the variable-rail guide rail 302 and is fixedly connected with the second end of the variable-rail channel 304 and the reversing mounting plate 3051; the reversing sliding groove 4024 is arranged on the variable-rail sliding block 306, and the reversing blocking piece 3052 is in sliding cooperation with the reversing sliding groove 4024.

[0063] The variable-rail guide rail 302 can limit and guide the movement of the variable-rail sliding block 306 to prevent the variable-rail sliding block 306 from derailing. The variable-rail sliding block 306 is fixedly connected with the variable-rail channel 304 and the reversing mounting plate 3051, and can drive the variable-rail channel 304 and the blocking mechanism 305 to slide along the variable-rail guide rail 302. The reversing sliding groove 4024 can limit and guide the sliding of the reversing blocking piece 3052 to prevent the reversing blocking piece 3052 from derailing and failing to block.

[0064] Further, the blocking mechanism 305 further comprises a reversing detection photoelectric coupler and a photoelectric coupler blocking piece 4031, and the reversing detection photoelectric coupler is used to detect the position of the reversing blocking piece 3052.

[0065] In the embodiment, the variable-rail driving structure 303 comprises a variable-rail motor 3031, a variable-rail screw rod 3032 and a variable-rail nut; the variable-rail motor 3031 is fixedly connected to the variable-rail mounting base plate 301; one end of the variable-rail screw rod 3032 is connected to the power output end of the variable-rail motor 3031, and the other end is connected to the bearing seat 3035 on the variable-rail mounting base plate 301 through a bearing 3034; the variable-rail nut is sleeved on the outer periphery of the variable-rail screw rod 3032 and is in threaded connection with the variable-rail screw rod 3032, and the variable-rail nut is fixedly connected with the variable-rail sliding block 306.

[0066] The variable-rail screw rod 3032 rotates under the drive of the power output end of the variable-rail motor 3031, and the variable-rail nut in threaded connection with the variable-rail screw rod 3032 cannot rotate with the variable-rail screw rod 3032 due to the fixed connection with the variable-rail sliding block 306. The variable-rail nut reciprocally moves along the axial direction of the variable-rail screw rod 3032 to adjust the position of the variable-rail sliding block 306 when the variable-rail screw rod 3032 rotates, thereby adjusting the first end of the variable-rail channel 304 to match different conveying belts. One end of the variable-rail screw rod 3032 is connected to the power output end of the variable-rail motor 3031, and the other end is connected to the bearing seat 3035 through the bearing 3034, which not only supports and fixes the variable-rail screw rod 3032, but also ensures that the variable-rail screw rod 3032 can rotate smoothly.

[0067] Further, the variable-rail nut is fixedly connected with the variable-rail sliding block 306 through a nut fixing plate, and the variable-rail driving structure 303 further comprises a nut detection photoelectric coupler 3033 arranged on the nut fixing plate and used to detect the position of the variable-rail nut.

[0068] As the transformable embodiment, the track-changing driving structure 303 can also include a track-changing motor 3031, a driving wheel, a driven wheel and a chain belt. The driving wheel is arranged on the outer periphery of the power output shaft of the track-changing motor 3031. The driven wheel is arranged in a spaced manner with the driving wheel. The chain belt is sleeved on the outer peripheries of the driving wheel and the driven wheel and is engaged with the driving wheel and the driven wheel. The track-changing slider 306 is fixedly connected with the chain belt and moves along the track-changing guide rail 302 under the driving of the chain belt.

[0069] The sample conveying system of the embodiment further includes a track-changing detection switch 307 fixedly connected with the track-changing channel 304 and used for detecting whether the sample rack 100 is introduced into the track-changing channel 304 and the position state of the introduced sample rack 100. After the sample rack 100 is detected to be introduced into the track-changing channel 304 and positioned, the position adjustment of the track-changing slider 306 can be realized by the track-changing driving structure 303, so as to realize the matching of the second end with different conveying belts of the sample conveying system. The track-changing detection switch 307 can be a track-changing detection photoelectric coupler.

[0070] The sample conveying system of the embodiment further includes a return channel 308 and a return reset structure 3010. The return channel 308 is slidably connected with the track-changing guide rail 302 and is arranged in parallel with the track-changing channel 304. The return reset structure 3010 includes a return elastic member 30101 used for driving the return channel 308 to return to an initial position in which the return channel 308 is communicated with the return conveying belt 202 of the sample conveying system. The return reset structure 3010 can drive the return channel 308 to return to the initial position under the elastic force of the return elastic member 30101. The return channel 308 can move away from the return conveying belt 202 under the pushing of the track-changing channel 304.

[0071] The sample conveying system of the embodiment further includes a return slider 3011 fixedly connected with the return channel 308 and slidably connected with the track-changing guide rail 302. The return reset structure 3010 further includes a return support seat 309, a return baffle 30102 and a return slide rod 30103. The return support seat 309 is fixedly connected with the track-changing mounting base plate 301. The return baffle 30102 is provided with a connecting through hole. The return baffle 30102 is fixedly connected with the return slider 3011. One end of the return slide rod 30103 is fixedly connected with the return support seat 309, and the other end is slidably matched with the connecting through hole. The return elastic member 30101 is a return spring. The return spring is sleeved on the outer periphery of the return slide rod 30103 and abuts between the return baffle 30102 and the return support seat 309.

[0072] The return slide rod 30103 can limit the return spring to prevent the return spring from being unable to apply the driving force for returning the return channel 308 to the original position due to skew. The return slide rod 30103 can be limited through the connecting through hole.

[0073] Specifically, the return detection light coupler and the return light coupler baffle 4031 are further included, and the return detection light coupler is used for detecting the position state of the return channel 308.

[0074] The sample conveying system provided in the embodiment includes the automatic rail changing device 203 described above, and further includes three conveying belts, one of which is a normal sample suction conveying belt 201, one of which is an emergency sample suction conveying belt 201, and the other of which is a return conveying belt 202. The rail changing channel 304 of the sample conveying system can be driven by the rail changing driving structure 303 to match different conveying belts, so as to change the rail of the sample rack 100 from one conveying belt to another conveying belt.

[0075] When the sample rack 100 on the conveying belt of the sample conveying system needs to be changed, the use process of the sample conveying system in the embodiment includes: the rail changing channel 304 is driven by the rail changing driving structure 303 to move to the front of the conveying belt that needs to be changed, and the first end of the rail changing channel 304 is driven by the rail changing driving structure 303 to correspond to the conveying belt that needs to be changed; the reversing blocking piece 3052 of the blocking mechanism 305 is driven by the reversing driving assembly 3055 to move from the separation position to the blocking position; the sample blocking assembly between the conveying belt and the first end of the rail changing channel 304 is retracted, and the sample rack 100 can be guided into the rail changing channel 304 under the driving of the conveying belt; the rail changing detection switch 307 arranged on the rail changing channel 304 detects the position state of the sample rack 100 guided into the rail changing channel 304; after the rail changing detection switch 307 detects that the sample rack 100 guided into the rail changing channel 304 is in place, the rail changing driving structure 303 drives the rail changing channel 304 to move, so as to drive the sample rack 100 in the rail changing channel 304 to move to the front of the target conveying belt and align the first end of the rail changing channel 304 with the target conveying belt; under the driving of the target conveying belt, the sample rack 100 moves to the target conveying belt; and the corresponding sample rack 100 detection switch on the target conveying belt detects the position state of the sample rack 100 in the channel; after the sample rack 100 detection switch detects that the sample rack 100 is in place on the target conveying belt, the rail changing driving structure 303 drives the rail changing channel 304 to move to the initial position.

[0076] As shown in Figures 1 to 7 The sample conveying system disclosed in the embodiment further includes a rack 204 and a baffle 205, the baffle 205 is connected to the rack 204, is located on both sides of the conveying belt, and surrounds the conveying guide groove with the conveying belt to form a notch facing upward; wherein the sample inlet device and the blocking and limiting mechanism are both arranged on the rack 204 and located outside the conveying guide groove.

[0077] The baffle 205 can be arranged to form a conveying guide groove with the conveying belt, which can prevent the sample rack 100 from derailing, and can simplify the structure, reduce the size of the sample conveying system, and reduce the floor area.

[0078] In this embodiment, the baffle 205 is provided with a limiting opening 2051, and the blocking and limiting mechanism includes a mounting frame 401, a limiting driving assembly 402, and a limiting baffle 403. The mounting frame 401 is arranged on the rack 204 and located outside the conveying guide groove. The limiting driving assembly 402 is arranged on the mounting frame 401. One end of the limiting baffle 403 is rotationally connected to the mounting frame 401, and the other end has a blocking position for blocking and limiting the movement of the sample rack 100 through the limiting opening 2051, and a release position for releasing the movement of the sample rack 100 by exiting through the limiting opening 2051. The limiting driving assembly 402 is in transmission connection with the limiting baffle 403 to drive the limiting baffle 403 to rotate around the connecting point of the limiting baffle 403 and the mounting frame 401.

[0079] The blocking and limiting mechanism of this embodiment can drive the limiting baffle 403 to rotate around the connecting point of the limiting baffle 403 and the mounting frame 401 to the blocking position when the sample rack 100 needs to be blocked and limited, so that the limiting baffle 403 abuts against the sample rack 100, thereby blocking and limiting the sample rack 100, buffering the sample rack 100, avoiding the sample rack 100 from colliding at the detection position, and ensuring the normal detection and analysis of the sample. When the sample rack 100 needs to be released, the limiting driving assembly 402 drives the limiting baffle 403 to rotate around the connecting point of the limiting baffle 403 and the mounting frame 401 to the release position, so that the limiting baffle 403 is separated from the sample rack 100, thereby releasing the sample rack 100 and ensuring the normal transmission of the sample rack 100 to the detection position. Therefore, this embodiment can drive the limiting baffle 403 to move by the limiting driving assembly 402, complete the blocking or releasing of the sample rack 100, and is simple and labor-saving to operate.

[0080] It should be noted that the blocking and limiting mechanism of this embodiment is applied to the field of biochemical detection, and is used for blocking and limiting the sample rack 100 carrying samples. The sample rack 100 is generally batch-transmitted by a conveying belt. The blocking and limiting mechanism is arranged on one side of the conveying belt and in front of the detection position. When blocking and limiting is needed, the blocking and limiting mechanism is started, the limiting baffle 403 is rotated to the conveying belt to abut against and limit the sample rack 100, which can buffer the feeding speed of the sample rack 100, avoid the sample rack 100 from colliding at the detection position, and ensure the orderly detection of the sample. Of course, in other embodiments, the blocking and limiting mechanism can also be applied to other fields to block and limit the incoming material, and is not limited to this embodiment.

[0081] The mounting frame 401 comprises a side connecting part 4011 and a connecting plate 4012, wherein the side connecting part 4011 is rotationally connected with the limiting baffle 403, and the connecting plate 4012 is connected with the limiting driving assembly 402 and the position detection assembly 404, so as to realize the connection support of the limiting baffle 403, the limiting driving assembly 402 and the position detection assembly 404, and good structural compactness.

[0082] In the embodiment, the limiting driving assembly 402 comprises a driving part 4021, a transmission wheel 4022 and a transmission matching part, wherein the driving part 4021 is arranged on the mounting frame 401, the transmission wheel 4022 is in transmission connection with the driving part 4021, and the transmission matching part is arranged eccentrically relative to the center of the transmission wheel 4022, and the transmission wheel 4022 is in sliding connection with the limiting baffle 403 through the transmission matching part, so that the limiting baffle 403 can rotate clockwise or counterclockwise following the transmission wheel 4022.

[0083] According to the above arrangement, when it is needed to block and limit the sample rack 100, the driving part 4021 drives the transmission wheel 4022 to rotate forward, so as to drive the limiting baffle 403 to rotate counterclockwise and the limiting baffle 403 to slide relative to the transmission wheel 4022, until the limiting baffle 403 rotates to the blocking position to block and limit the sample rack 100, and when it is needed to release the sample rack 100, the driving part 4021 drives the transmission wheel 4022 to rotate reversely, so as to drive the limiting baffle 403 to rotate clockwise and the limiting baffle 403 to slide relative to the transmission wheel 4022, until the limiting baffle 403 rotates to the releasing position.

[0084] Specifically, the driving part 4021 is a reversible motor, which is fixedly connected to the connecting plate 4012 of the mounting frame 401, and an output shaft of the reversible motor penetrates the connecting plate 4012. When the reversible motor rotates clockwise, the transmission wheel 4022 is driven to rotate forward, so as to drive the limiting baffle 403 to rotate to the blocking position, and when the reversible motor rotates counterclockwise, the transmission wheel 4022 is driven to rotate reversely, so as to drive the limiting baffle 403 to rotate to the releasing position.

[0085] The transmission wheel 4022 is an eccentric cam, which is connected with one end of the output shaft of the reversible motor penetrating the connecting plate 4012 through a shaft coupling. Further, an installation groove 50311 is arranged on the side of the transmission wheel 4022 away from the driving part 4021, so as to facilitate the installation of the position detection assembly 404.

[0086] In the embodiment, the transmission matching part comprises a follower shaft 4023 and a sliding groove 4024, one of the follower shaft 4023 and the sliding groove 4024 is eccentrically arranged on the transmission wheel 4022, and the other is arranged on the limiting baffle 403, and the follower shaft 4023 is slidingly inserted into the sliding groove 4024. When the transmission wheel 4022 drives the limiting baffle 403 to rotate, the follower shaft 4023 slides in the sliding groove 4024, so that the limiting baffle 403 rotates smoothly, and the rotation switching between the blocking position and the release position is realized, and the structure is simple and reliable.

[0087] Optionally, the follower shaft 4023 is arranged on the transmission wheel 4022, and the sliding groove 4024 is arranged on the limiting baffle 403. It can be understood that the sliding groove 4024 is a long strip-shaped groove, and the length dimension of the sliding groove 4024 determines the rotation amplitude of the limiting baffle 403, so that the rotation amplitude of the limiting baffle 403 can be controlled by designing the length of the sliding groove 4024, and the controllability is good.

[0088] In the embodiment, the limiting baffle 403 comprises a limiting swing arm 4032 and a baffle 4031 connected to each other, the limiting swing arm 4032 and the baffle 4031 are arranged at an angle, the sliding groove 4024 is arranged on the limiting swing arm 4032, and the limiting swing arm 4032 is rotatably connected to the mounting frame 401. When the limiting baffle 403 moves, one end of the limiting swing arm 4032 rotates around the mounting frame 401, and the other end swings following the rotation of the transmission wheel 4022 through the follower shaft 4023, so as to drive the baffle 4031 to rotate at the connecting point of the limiting swing arm 4032 and the mounting frame 401, and complete the switching between the blocking position and the release position.

[0089] Specifically, the baffle 4031 and the limiting swing arm 4032 are rotatably connected to the side connecting part 4011 of the mounting frame 401 through the rotating shaft 4033, and when the limiting swing arm 4032 swings, the baffle 4031 rotates around the rotating shaft 4033, so as to switch the baffle 4031 between the blocking position and the release position, and block or release the sample rack 100.

[0090] Further, an insertion part 40311 is arranged at one end of the baffle 4031 away from the limiting swing arm 4032, the two sides of the conveying belt are provided with baffles 205, the baffles 205 are provided with avoiding holes, and the insertion part 40311 is suitable for penetrating the avoiding holes to abut against the sample rack 100 on the conveying belt, so as to realize the limiting.

[0091] In the embodiment, the blocking and limiting mechanism further comprises a position detection assembly 404 arranged on the mounting frame 401 to detect the in-position information of the limiting baffle 403 in the blocking position or the passing position, and a controller in communication connection with the limiting driving assembly 402 and the position detection assembly 404 to control the movement of the limiting driving assembly 402 according to the in-position information. With this arrangement, the position detection assembly 404 can detect the in-position information of the limiting baffle 403 in the blocking position or the passing position, and the controller can determine the position of the limiting baffle 403 according to the in-position information, and then control the movement of the limiting driving assembly 402 to drive the limiting baffle 403 to rotate to the blocking position or the passing position to block and limit the sample holder 100, avoid the sample holders 100 in the detection position from colliding with each other, and ensure the normal detection and analysis of the samples. When the sample holder 100 needs to be released, the controller controls the movement of the limiting driving assembly 402 according to the in-position information detected by the position detection assembly 404 to drive the limiting baffle 403 to rotate to the passing position, thereby achieving accurate control of the position of the limiting baffle 403 with high control precision and automation.

[0092] Specifically, when the sample holder 100 needs to be blocked and limited, the position detection assembly 404 first detects the in-position information of the limiting baffle 403. If the limiting baffle 403 is detected in the blocking position, the controller controls the limiting driving assembly 402 not to move, so that the limiting baffle 403 remains in the blocking position. If the limiting baffle 403 is detected in the passing position, the controller controls the limiting driving assembly 402 to move, so that the limiting baffle 403 rotates from the passing position to the blocking position. When the position detection assembly 404 detects that the limiting baffle 403 rotates to the blocking position, the controller controls the limiting driving assembly 402 to stop moving immediately, so that the limiting baffle 403 is accurately in the blocking position.

[0093] When the sample holder 100 needs to be released, the position detection assembly 404 first detects the in-position information of the limiting baffle 403. If the limiting baffle 403 is detected in the passing position, the controller controls the limiting driving assembly 402 not to move, so that the limiting baffle 403 remains in the passing position. If the limiting baffle 403 is detected in the blocking position, the controller controls the limiting driving assembly 402 to move, so that the limiting baffle 403 rotates from the blocking position to the passing position. When the position detection assembly 404 detects that the limiting baffle 403 rotates to the passing position, the controller controls the limiting driving assembly 402 to stop moving immediately, so that the limiting baffle 403 is accurately in the passing position.

[0094] Therefore, the blocking and limiting mechanism of the embodiment can realize accurate control of the movement of the limiting driving assembly 402 through the cooperation of the position detection assembly 404 and the controller, thereby achieving accurate control of the position of the limiting baffle 403.

[0095] In terms of the specific structure of the position detection assembly 404, in this embodiment, the position detection assembly 404 comprises a first detection switch 4041, a second detection switch 4042 and a detection plate 4043, wherein the first detection switch 4041 and the second detection switch 4042 are both arranged on the mounting frame 401, and the first detection switch 4041 and the second detection switch 4042 are both in communication connection with the controller, the detection plate 4043 is in transmission connection with the limiting driving assembly 402, and the detection plate 4043 corresponds to the first detection switch 4041 when the limiting baffle 403 rotates to the blocking position, and the detection plate 4043 corresponds to the second detection switch 4042 when the limiting baffle 403 rotates to the release position.

[0096] When it is necessary to block the sample rack 100, the position of the detection plate 4043 is first acquired through the first detection switch 4041 and the second detection switch 4042, if the first detection switch 4041 detects the detection plate 4043, it indicates that the limiting baffle 403 is located at the blocking position at this time, and the controller controls the limiting driving assembly 402 not to move; if the second detection switch 4042 detects the detection plate 4043, it indicates that the limiting baffle 403 is located at the release position at this time, and the controller controls the limiting driving assembly 402 to move, so that the limiting baffle 403 rotates from the release position to the blocking position, and the limiting driving assembly 402 drives the detection plate 4043 to move from the second detection switch 4042 to the first detection switch 4041, when the first detection switch 4041 detects the information of the detection plate 4043 and determines that the limiting baffle 403 reaches the blocking position, the controller immediately controls the limiting driving assembly 402 to stop moving, so that the limiting baffle 403 is accurately parked at the blocking position.

[0097] When it is necessary to release the sample rack 100, the position of the detection plate 4043 is first acquired through the first detection switch 4041 and the second detection switch 4042, if the second detection switch 4042 detects the detection plate 4043, it indicates that the limiting baffle 403 is located at the release position at this time, and the controller controls the limiting driving assembly 402 not to move; if the first detection switch 4041 detects the detection plate 4043, it indicates that the limiting baffle 403 is located at the blocking position at this time, and the controller controls the limiting driving assembly 402 to move, so that the limiting baffle 403 rotates from the blocking position to the release position, and the limiting driving assembly 402 drives the detection plate 4043 to move from the first detection switch 4041 to the second detection switch 4042, when the second detection switch 4042 detects the information of the detection plate 4043 and determines that the limiting baffle 403 reaches the release position, the controller immediately controls the limiting driving assembly 402 to stop moving, so that the limiting baffle 403 is accurately parked at the release position.

[0098] Therefore, the first detection switch 4041 feeds back information of the position of the limiting baffle 403 in the blocking position, and the second detection switch 4042 feeds back information of the position of the limiting baffle 403 in the releasing position, so that the controller can accurately control the movement of the limiting driving assembly 402 according to the position information fed back by the first detection switch 4041 and the second detection switch 4042, thereby realizing accurate and automatic control of the limiting baffle 403.

[0099] For example, the first detection switch 4041 and the second detection switch 4042 can be configured as detection light couplings, and the detection plate 4043 is a light coupling baffle 4031. When the light coupling baffle 4031 moves with the limiting driving assembly 402 to the detection light coupling, the detection light coupling can be triggered, and the detection light coupling transmits a signal to the controller, so as to obtain the position information of the limiting baffle 403.

[0100] For specific installation, in the embodiment, the first detection switch 4041 and the second detection switch 4042 are both mounted on the switch mounting seat 4044, and the switch mounting seat 4044 is fixedly connected to the connecting plate 4012 of the mounting frame 401. More specifically, the detection switches first detection switch 4041 and second detection switch 4042 and the switch mounting seat 4044, and the switch mounting seat 4044 and the connecting plate 4012 can be connected by bolts or screws, so as to facilitate disassembly, replacement.

[0101] The detection plate 4043 is connected with the transmission wheel 4022 to rotate between the first detection switch 4041 and the second detection switch 4042. In the embodiment, the detection plate 4043 is fixedly connected in the mounting groove 50311 of the transmission wheel 4022, and the detection plate 4043 is flush with the surface of the transmission wheel 4022, so as to avoid the detection plate 4043 from hindering the movement of the limiting swing arm 4032.

[0102] The controller is configured to receive signals of the first detection switch 4041 and the second detection switch 4042, and control the movement of the driving part 4021 according to the received signals, so as to control the rotation of the transmission wheel 4022 and the limiting baffle 403, thereby realizing accurate control of the position of the limiting baffle 403. Since the structure and principle of the controller are prior art, the embodiment will not be described here.

[0103] In order to facilitate understanding of the blocking limiting mechanism of the embodiment, the control process thereof will be introduced as follows:

[0104] When the sample holder 100 needs to be blocked and limited.

[0105] The first case: if the second detection switch 4042 detects the detection plate 4043, it indicates that the limiting baffle 403 is located at the release position at this time, the controller receives the position information of the limiting baffle 403 at the release position and controls the driving part 4021 to move forward, and then drives the transmission wheel 4022 to rotate clockwise, so as to drive the limiting baffle 403 to rotate counterclockwise from the release position to the blocking position, and at the same time, the transmission wheel 4022 drives the detection plate 4043 to move from the second detection switch 4042 to the first detection switch 4041; when the first detection switch 4041 detects the information of the detection plate 4043, it is determined that the limiting baffle 403 reaches the blocking position, and the controller immediately controls the driving part 4021 to stop moving, so that the limiting baffle 403 is accurately parked at the blocking position.

[0106] The second case: if the first detection switch 4041 detects the detection plate 4043, it indicates that the limiting baffle 403 is located at the blocking position at this time, the controller receives the position information of the limiting baffle 403 at the blocking position and controls the driving part 4021 to stop moving, so that the limiting baffle 403 is maintained at the blocking position.

[0107] When the sample rack 100 needs to be released.

[0108] The first case: if the first detection switch 4041 detects the detection plate 4043, it indicates that the limiting baffle 403 is located at the blocking position at this time, the controller receives the position information of the limiting baffle 403 at the blocking position and controls the driving part 4021 to move reversely, and then drives the transmission wheel 4022 to rotate counterclockwise, so as to drive the limiting baffle 403 to rotate clockwise from the blocking position to the release position, and at the same time, the transmission wheel 4022 drives the detection plate 4043 to move from the first detection switch 4041 to the second detection switch 4042; when the second detection switch 4042 detects the information of the detection plate 4043, it is determined that the limiting baffle 403 reaches the release position, and the controller immediately controls the driving part 4021 to stop moving, so that the limiting baffle 403 is accurately parked at the release position.

[0109] The second case: if the second detection switch 4042 detects the detection plate 4043, it indicates that the limiting baffle 403 is located at the release position at this time, the controller receives the position information of the limiting baffle 403 at the release position and controls the driving part 4021 to stop moving, so that the limiting baffle 403 is maintained at the release position.

[0110] In summary, the blocking and limiting mechanism of the embodiment can automatically control the limiting driving assembly 402 to move to realize accurate control of the position of the limiting baffle 403 according to the in-position information detected by the position detection assembly 404, complete the blocking or release of the sample rack 100, and has high control precision and high automation degree.

[0111] Further, the embodiment also discloses a sample detection device, which comprises the conveying belt and the blocking and limiting mechanism.

[0112] It should be noted that the clockwise direction of the embodiment is the direction indicated by n1 in the figure, and the counterclockwise direction is the direction indicated by n2. Figure 13 Figure 13 It should be noted that the clockwise direction of the embodiment is the direction indicated by n1 in the figure, and the counterclockwise direction is the direction indicated by n2.

[0113] It should be noted that the clockwise direction of the embodiment is the direction indicated by n1 in the figure, and the counterclockwise direction is the direction indicated by n2.

[0114] In some embodiments, the follow-up shaft 4023 can be arranged on the limiting swing arm 4032, and the sliding groove 4024 can be arranged on the transmission wheel 4022, so that the limiting swing arm 4032 and the transmission wheel 4022 can be slidably matched.

[0115] In some embodiments, the limiting driving assembly 402 can also be a telescopic cylinder, which can drive the limiting baffle 403 to rotate to the blocking position or the release position through telescopic driving.

[0116] In some embodiments, the first detection switch 4041 and the second detection switch 4042 can also be photoelectric sensors or proximity switches, and are not limited to the solutions of the embodiment.

[0117] As shown in the figure, at least one of the conveying belts is a sample suction conveying belt 201, and the sample suction conveying belt 201 is sequentially provided with a first buffer area and a sample suction area along a conveying direction. Figures 1 to 7 The position corresponding to the sample suction device in the sample suction area is a sample suction position; the first buffer area is arranged on a side away from the automatic rail changing device 203, and the first buffer area is provided with a first sample rack detection switch 206; a first blocking and limiting mechanism 207 is arranged between the first buffer area and the sample suction area, and the sample suction area is provided with a second sample rack detection switch 208; a side of the sample suction area is provided with a sample feeding device 214; when the first sample rack detection switch 206 is triggered and the second sample rack detection switch 208 is not triggered, the first blocking and limiting mechanism 207 is in the release position; when the first sample rack detection switch 206 is not triggered and the second sample rack detection switch 208 is triggered, the first blocking and limiting mechanism 207 is in the blocking position; when the second sample rack detection switch 208 is triggered, the sample feeding device 214 controls multiple sample positions on the sample rack 100 to pass through the sample suction position in a progressive or intermittent manner.

[0118] ​The cooperation of the first sample rack detection switch 206, the second sample rack detection switch 208 and the first blocking limit mechanism 207 can control the movement of the sample rack 100 in the first buffer area, and prevent the sample rack 100 from entering the sample suction area when there is a sample rack 100 in the sample suction area, so as to avoid the collision with other sample racks 100.

[0119] In the embodiment, the sample suction conveying belt 201 is further provided with a second buffer area, which is arranged between the sample suction area and the automatic rail changing device 203, and is provided with a third sample rack detection switch 210. A second blocking limit mechanism 209 is arranged between the sample suction area and the second buffer area. When all the sample positions pass through the sample suction position and the third sample rack detection switch 210 is not triggered, the sample feeding device 214 releases the sample rack 100. When all the sample positions pass through the sample suction position and the third sample rack detection switch 210 is triggered, the sample feeding device 214 controls the sample rack 100 to wait in the sample suction area.

[0120] The cooperation of the second blocking limit mechanism 209, the third sample rack detection switch 210 and the sample feeding device 214 can control the movement and speed of the sample rack 100 moving to the second buffer area, so as to prevent the sample rack 100 from moving too fast when entering the rail changing channel 304 of the automatic rail changing device 203, and thus causing the derailment from the rail changing channel 304.

[0121] In the embodiment, the rail changing channel 304 is provided with a rail changing detection switch 307. When the third sample rack detection switch 210 is triggered and the rail changing channel 304 is not connected with the current sample suction conveying belt 201, and / or the rail changing detection switch 307 is triggered, the second blocking limit mechanism 209 is in the blocking position. When the third sample rack detection switch 210 is triggered and the rail changing channel 304 is connected with the current sample suction conveying belt 201, and the rail changing detection switch 307 is not triggered, the second blocking limit mechanism 209 is in the release position. This can prevent the sample rack 100 from moving too fast to the automatic rail changing device 203 and derailing when the rail changing channel 304 is not connected.

[0122] In the embodiment, the rail changing channel 304 is provided with a blocking mechanism 305 at the end away from the conveying belt, which is adapted to block the end of the rail changing channel 304 away from the conveying belt. When the rail changing channel 304 is connected with the current sample suction conveying belt 201, the blocking mechanism 305 blocks the end of the rail changing channel 304 away from the conveying belt.

[0123] In the embodiment, the sample suction conveying belt 201 has at least two; wherein the variable rail channel 304 is moved to communicate with the target sample suction conveying belt 201, and when the variable rail detection switch 307 is triggered, if the third sample rack detection switch 210 of the target sample suction conveying belt 201 is not triggered, the second blocking limiting mechanism 209 of the target sample suction conveying belt 201 is in the release position; if the third sample rack detection switch 210 of the target sample suction conveying belt 201 is triggered, the second blocking limiting mechanism 209 of the target sample suction conveying belt 201 is in the blocking position.

[0124] As shown in Figures 1 to 7 and Figures 16 to 19 In the embodiment, the baffle 205 on the side of the sample suction conveying belt 201 is provided with a first limiting long hole 2052 extending in the conveying direction of the sample suction conveying belt 201, and the sample feeding device 214 includes a base 501, a linear driving mechanism 502 and a pushing piece mechanism 503; the base 501 is arranged on the rack 204 and located outside the conveying guide groove surrounded by the sample suction conveying belt 201; the linear driving mechanism 502 is arranged on the base 501; the pushing piece mechanism 503 is adapted to penetrate through the first limiting long hole 2052 and abut against the sample rack 100, and the linear driving mechanism 502 is in transmission connection with the pushing piece mechanism 503 to drive the pushing piece mechanism 503 to reciprocally move along the conveying direction of the conveying belt.

[0125] In use, the pushing piece mechanism 503 abuts against the sample rack 100, and at the same time the linear driving mechanism 502 drives the pushing piece mechanism 503 to move along the length direction of the base 501, so as to control the moving feeding speed of the sample rack 100, avoid too fast feeding speed from causing too many sample racks 100 to rush into the sample suction position, and also keep the sample rack 100 moving towards the sample suction position for feeding, so as to ensure uninterrupted operation of the sample suction position and improve the detection efficiency.

[0126] It can be understood that the sample feeding device of the embodiment is applied in the field of biochemical detection, and is used for blocking and limiting the sample rack 100 carrying samples to control the feeding speed. The sample rack 100 is generally automatically transmitted in batches by a conveying belt, the sample feeding device is arranged on one side of the conveying belt and located at the sample suction position, the pushing piece mechanism 503 abuts against the sample rack 100, and then the linear driving mechanism 502 drives the pushing piece mechanism 503 to move, so as to realize control of the feeding speed of the sample rack 100, buffer the feeding speed of the sample rack 100 on the conveying belt, and ensure orderly sample detection. Of course, in other embodiments, the sample feeding device can also be applied in other fields to control the feeding speed of incoming materials, and is not limited to the embodiment.

[0127] In this embodiment, the base 501 is a rectangular plate, which is placed horizontally. That is, the length direction of the base 501 is consistent with the left-right direction in the figure. Figure 16 or Figure 17 the left-right direction in the figure.

[0128] In this embodiment, intermittent starting of the linear drive mechanism 502 can drive the pushing piece mechanism 503 to move intermittently along the length direction of the base 501, so as to realize intermittent / progressive sample injection of the sample holder 100.

[0129] Specifically, the intermittent starting of the linear drive mechanism 502 can be controlled by time or distance. For example, the linear drive mechanism 502 is started for 5 seconds or 4 seconds, and then stopped for 5 seconds or 4 seconds, and so on, so as to make the pushing piece mechanism 503 move for 5 seconds or 4 seconds, and then stop for 5 seconds or 4 seconds, so as to realize intermittent movement. For example, the linear drive mechanism 502 drives the pushing piece mechanism 503 to move for 1 meter or 2 meters, and then stops for a period of time, and then starts again to drive the pushing piece mechanism 503 to move for 1 meter or 2 meters, and so on, so as to limit the intermittent movement of the pushing piece mechanism 503, which is good in controllability.

[0130] The linear drive mechanism 502 includes a linear drive part 5021, a driving pulley 5022, a driven pulley 5023, and a transmission belt 5024. The linear drive part 5021 is arranged on the base 501. The driving pulley 5022 is rotatably connected to the base 501. The driving pulley 5022 is in transmission connection with the linear drive part 5021. The driven pulley 5023 is rotatably connected to the base 501. The driven pulley 5023 and the driving pulley 5022 are spaced apart along the length direction of the base 501. The transmission belt 5024 is sleeved on the driving pulley 5022 and the driven pulley 5023. The transmission belt 5024 is connected with the pushing piece mechanism 503. When the linear drive part 5021 is started, the linear drive part 5021 drives the driving pulley 5022 to rotate, the driving pulley 5022 drives the transmission belt 5024 and the driven pulley 5023 to rotate, and the transmission belt 5024 drives the pushing piece mechanism 503 to move along the length direction of the base 501, so as to separate the pushing piece mechanism 503 from the sample holder 100, to avoid the sample holder 100, so that the sample holder 100 can move for injection. When the linear drive part 5021 is not running, the pushing piece mechanism 503 does not move, so that the pushing piece mechanism 503 abuts against the sample holder 100 again, to limit and block the sample holder 100, so as to realize progressive / intermittent injection of the sample holder 100.

[0131] Specifically, the linear driving part 5021 is a driving motor, which is preferably a reversible motor, so as to change the rotating direction, thereby controlling the rotating direction of the transmission belt 5024, to control the moving direction of the pushing and poking mechanism 503, so that the pushing and poking mechanism 503 can reciprocate along the length direction of the base 501. The driving pulley 5022 and the driven pulley 5023 are respectively arranged at the left and right ends of the base 501.

[0132] In the embodiment, the pushing and poking mechanism 503 comprises a bottom plate 5031 and a poking piece 5033, wherein the bottom plate 5031 is connected with the linear driving mechanism 502, the poking piece 5033 is rotationally connected with the bottom plate 5031, the poking piece 5033 can rotate to a first position relative to the bottom plate 5031 to abut against the sample holder 100, and the poking piece 5033 can rotate to a second position relative to the bottom plate 5031 to avoid the sample holder 100.

[0133] When it is needed to abut against the sample holder 100, the poking piece 5033 is poked to rotate to the first position relative to the bottom plate 5031, so that the poking piece 5033 rotates to the first position to abut against the sample holder 100, and when it is needed to avoid the sample holder 100, the poking piece 5033 is poked to rotate to the second position relative to the bottom plate 5031, so that the poking piece 5033 rotates to the second position to separate from the sample holder 100, thereby achieving the avoiding and releasing.

[0134] Further, the pushing and poking mechanism 503 further comprises a rotating connecting plate 5032, which is rotationally connected with the bottom plate 5031 and is fixedly connected with the poking piece 5033, so as to drive the poking piece 5033 to rotate to the first position or the second position by rotating the rotating connecting plate 5032 relative to the bottom plate 5031.

[0135] The bottom plate 5031 is connected with the transmission belt 5024 to be driven to move. Further, the bottom plate 5031 is provided with a mounting groove 50311, and the rotating connecting plate 5032 is rotationally arranged in the mounting groove 50311, and when the poking piece 5033 rotates to the first position, the rotating connecting plate 5032 abuts against the side wall of the mounting groove 50311. The mounting groove 50311 is arranged to rotate the rotating connecting plate 5032 in the mounting groove 50311, and when the poking piece 5033 rotates to the first position, the abutment between the rotating connecting plate 5032 and the side wall of the mounting groove 50311 limits the position of the poking piece 5033, so that the poking piece 5033 is maintained in the first position, thereby improving the abutment stability of the poking piece 5033 and the sample holder 100.

[0136] Specifically, the installation groove 50311 has an opening towards the second position to facilitate the rotation of the rotating connecting plate 5032 along the opening, so that the push piece 5033 is rotated to the second position. The installation groove 50311 is provided with a side wall towards the first position, which can abut against the rotating connecting plate 5032 to limit the rotating connecting plate 5032 when the push piece 5033 is rotated to the first position, so as to avoid the rotation of the push piece 5033 when the push piece 5033 abuts against the sample rack 100.

[0137] The push piece mechanism 503 further comprises a push piece rotating shaft 5036, which is connected with the rotating plate and the bottom plate 5031, so that the rotating plate rotates around the push piece rotating shaft 5036.

[0138] In addition, the push piece mechanism 503 of the embodiment further comprises a pressing plate 5034 arranged above the rotating connecting plate 5032, which is connected with the bottom plate 5031 to limit the rotating connecting plate 5032 between the pressing plate 5034 and the bottom plate 5031, so as to avoid the up-and-down movement of the rotating connecting plate 5032 during rotation, thereby improving the stability of the rotation process.

[0139] The push piece mechanism 503 further comprises an elastic reset member 5035 arranged in the installation groove 50311, one end of which is connected with the side wall of the installation groove 50311, and the other end of which is connected with the rotating connecting plate 5032 or the push piece 5033. According to the arrangement, when the push piece 5033 is rotated to the second position by driving the rotating connecting plate 5032, the elastic reset member 5035 is compressed or stretched, and when the external force disappears, the rotating connecting plate 5032 and the push piece 5033 are rotated to the first position to reset under the restoring force of the elastic reset member 5035. Therefore, the arrangement of the elastic reset member 5035 can enable the push piece 5033 to be quickly and automatically reset, thereby reducing the operation.

[0140] In the embodiment, the other end of the elastic reset member 5035 is connected with the rotating connecting plate 5032, and the elastic reset member 5035 and the push piece 5033 are arranged on both sides of the push piece rotating shaft 5036. When the push piece 5033 drives the rotating connecting plate 5032 to rotate to the second position, the elastic reset member 5035 is compressed by the rotating connecting plate 5032. Specifically, the elastic reset member 5035 can be a spring or a spring piece.

[0141] In the embodiment, the sample injection device further comprises a reset mechanism 504 arranged on the base 501, which can be in transmission cooperation with the push piece 5033 to rotate the push piece 5033 to the second position. When it is needed to release the sample rack 100, the transmission belt 5024 drives the push piece mechanism 503 to abut against the reset mechanism 504, and the reset mechanism 504 drives the push piece 5033 to rotate to the second position, so that the sample rack 100 can pass through the sample injection device, and the connecting plate 5032 rotates to compress the elastic reset member 5035. When it is needed to block the sample rack 100 again, the transmission belt 5024 drives the push piece mechanism 503 to move away from the reset mechanism 504, and the push piece 5033 rotates to the first position under the restoring force of the elastic reset member 5035 to reset and block the sample rack 100.

[0142] In terms of the arrangement position, in the embodiment, the reset mechanism 504 is arranged near one end of the driven pulley 5023. When the transmission belt 5024 drives the push piece mechanism 503 to move from one end of the driving pulley 5022 to one end of the driven pulley 5023, the push piece 5033 is located at the first position to abut against and block the sample rack 100, and the progressive sample injection is realized. In this process, the side wall of the mounting groove 50311 limits the push piece 5033 to ensure stability. When the push piece mechanism 503 moves to abut against the reset mechanism 504, the reset mechanism 504 drives the push piece 5033 to rotate to the second position to release the sample rack 100, so that the sample rack 100 can pass through. When the push piece mechanism 503 needs to be reset and move to one end of the driving pulley 5022, the transmission belt 5024 drives the push piece mechanism 503 to move from one end of the driven pulley 5023 to one end of the driving pulley 5022, so that the push piece 5033 moves away from the reset mechanism 504, and the push piece 5033 rotates to the first position under the driving of the elastic reset member 5035, so that the push piece mechanism 503 is reset, and the next progressive sample injection is prepared.

[0143] In terms of the specific structure of the reset mechanism 504, in the embodiment, the reset mechanism 504 comprises a fixed seat 5041 and a reset bearing 5043. The fixed seat 5041 is arranged on the base 501, and a fixed shaft 5042 is arranged on the fixed seat 5041. The reset bearing 5043 is sleeved on the fixed shaft 5042, and can be in rotational cooperation with the push piece 5033. The rotational cooperation between the reset bearing 5043 and the push piece 5033 not only drives the push piece 5033 to rotate to the second position, but also reduces the abrasion between the reset bearing 5043 and the push piece mechanism 503, so as to ensure the service life of the structure.

[0144] It can be understood that the sample injection device also includes a connecting seat 505, the bottom of the connecting seat 505 is connected with the transmission belt 5024, the top of the connecting seat 505 extends out of the base 501, and the bottom plate 5031 is arranged on the top of the connecting seat 505. The arrangement of the connecting seat 505 realizes the connection of the pushing piece mechanism 503 and the transmission belt 5024, and the structural stability is good.

[0145] Further, the sample injection device also includes a guide structure 506 arranged along the length direction of the base 501, and the connecting seat 505 is slidably connected to the guide structure 506. When the transmission belt 5024 drives the connecting seat 505 to move along the length direction of the base 501, the connecting seat 505 simultaneously slides on the guide structure 506, which can ensure the movement accuracy of the pushing piece mechanism 503, and the guide structure 506 can also support the pushing piece mechanism 503 to reduce the stress of the transmission belt 5024.

[0146] In the embodiment, the guide structure 506 is a guide rail, and the connecting seat 505 is slidably installed on the guide rail. In order to avoid the connecting seat 505 from sliding out of the guide rail, the embodiment is provided with a limiting column at both ends of the guide rail, and the limiting column can abut against the connecting seat 505 to avoid the connecting seat 505 from sliding out of the guide rail, thereby improving the safety in use.

[0147] It can be understood that the sample injection device also includes a detection assembly 507 and a controller, wherein the detection assembly 507 is arranged on the base 501 and is used to detect the position information of the pushing piece mechanism 503, the controller is in communication connection with the linear driving mechanism 502 and the detection assembly 507, and the controller is adapted to control the movement direction of the linear driving mechanism 502 according to the position information.

[0148] The above arrangement can detect the position information of the pushing piece mechanism 503 through the detection assembly 507, and feed back the position information to the controller, so that the controller can control the movement direction of the linear driving mechanism 502 according to the position information, realize the control of the movement direction of the pushing piece mechanism 503, and finally improve the control accuracy and precision of the movement of the pushing piece mechanism 503.

[0149] Specifically, the detection assembly 507 comprises a third detection switch 5071, a fourth detection switch 5072 and a sample injection detection plate 5073. The third detection switch 5071 is arranged at one end of the base 501, and the fourth detection switch 5072 is arranged at the other end of the base 501. Both the fourth detection switch 5072 and the third detection switch 5071 are in communication connection with the controller. The sample injection detection plate 5073 is in transmission connection with the linear driving mechanism 502. The linear driving mechanism 502 can drive the sample injection detection plate 5073 to correspond to the third detection switch 5071 so that the controller controls the linear driving mechanism 502 to move forward. The linear driving mechanism 502 can drive the sample injection detection plate 5073 to correspond to the fourth detection switch 5072 so that the controller controls the linear driving mechanism 502 to move reversely.

[0150] According to the above arrangement, during the process that the linear driving mechanism 502 drives the sample injection detection plate 5073 to move from one end of the base 501 to the other end of the base 501, when the sample injection detection plate 5073 moves to correspond to the fourth detection switch 5072, the fourth detection switch 5072 transmits the detected position information to the controller, and the controller controls the linear driving mechanism 502 to move reversely. During the process that the linear driving mechanism 502 drives the sample injection detection plate 5073 to move from the other end of the base 501 to one end of the base 501, when the sample injection detection plate 5073 moves to correspond to the third detection switch 5071, the third detection switch 5071 transmits the detected position information to the controller, and the controller controls the linear driving mechanism 502 to move forward, so that the moving direction of the material pushing paddle mechanism 503 can be controlled and changed, and the use flexibility is high.

[0151] It should be noted that one end of the base 501 is the left end in Figure 16 or Figure 17 , and the other end of the base 501 is the right end in Figure 16 or Figure 17 .

[0152] In the embodiment, the third detection switch 5071 is arranged close to the driving belt wheel 5022, the third detection switch 5071 is arranged close to the driven belt wheel 5023, the sample injection detection plate 5073 is in transmission connection with the transmission belt 5024, and the controller is in communication connection with the linear driving part 5021. In the process that the linear driving part 5021 drives the transmission belt 5024 to drive the sample injection detection plate 5073 to move from the driving belt wheel 5022 to the driven belt wheel 5023, when the sample injection detection plate 5073 corresponds to the fourth detection switch 5072, the fourth detection switch 5072 transmits the detected position information to the controller, the controller controls the linear driving part 5021 to reversely rotate, so that the transmission belt 5024 reversely rotates to drive the sample injection detection plate 5073 to move from the driven belt wheel 5023 to the driving belt wheel 5022, when the sample injection detection plate 5073 corresponds to the third detection switch 5071, the third detection switch 5071 transmits the detected position information to the controller, the controller controls the linear driving part 5021 to forwardly rotate, so that the transmission belt 5024 reversely rotates again to drive the sample injection detection plate 5073 to move from the driving belt wheel 5022 to the driven belt wheel 5023.

[0153] In the embodiment, the sample injection detection plate 5073 is connected and fixed with the transmission belt 5024 through the connecting seat 505. The transmission belt 5024 drives the pushing piece mechanism 503 and the sample injection detection plate 5073 to synchronously and directionally move, that is, when the sample injection detection plate 5073 corresponds to the third detection switch 5071, the third detection switch 5071 detects that the pushing piece mechanism 503 moves to one side of the driving belt wheel 5022, when the sample injection detection plate 5073 corresponds to the fourth detection switch 5072, the fourth detection switch 5072 detects that the pushing piece mechanism 503 moves to one side of the driven belt wheel 5023.

[0154] Exemplarily, the third detection switch 5071 and the fourth detection switch 5072 are both detection photo-couplers.

[0155] In order to facilitate understanding of the sample injection device of the embodiment, the action process thereof is introduced as follows:

[0156] The position of the push piece 5033 is limited by the abutment of the rotating connecting plate 5032 and the side wall of the mounting groove 50311. When the linear driving part 5021 is not running, the push piece mechanism 503 does not move, so that the push piece 5033 abuts against the sample holder 100, limiting and blocking the sample holder 100. When the linear driving part 5021 is started, the linear driving part 5021 drives the driving pulley 5022 to rotate, and the driving pulley 5022 drives the transmission belt 5024 and the driven pulley 5023 to rotate. The transmission belt 5024 drives the push piece mechanism 503 and the sample feeding detection plate 5073 to move together from one end of the driving pulley 5022 to one end of the driven pulley 5023, so that the push piece 5033 is separated from the sample holder 100. The sample holder 100 is moved to feed samples under the driving of the conveying belt. By controlling the linear driving part 5021 to run intermittently, progressive or intermittent feeding of the sample holder 100 is realized. When the push piece mechanism 503 moves to the end of the driven pulley 5023 and abuts against the reset mechanism 504, the reset bearing 5043 pushes the push piece 5033 and the rotating connecting plate 5032 to rotate relative to the bottom plate 5031 to the second position, so that the push piece 5033 rotates away from the sample holder 100, thereby realizing the avoidance and release of the sample holder 100. The sample holder 100 can move to feed samples under the driving of the conveying belt. In this process, the elastic reset member 5035 is compressed. When the sample feeding detection plate 5073 corresponds to the fourth detection switch 5072, the controller controls the linear driving part 5021 to rotate reversely, so that the transmission belt 5024 reversely rotates, driving the sample feeding detection plate 5073 and the push piece 5033 to move together from one end of the driven pulley 5023 to one end of the driving pulley 5022, so that the push piece 5033 is separated from the reset bearing 5043. The push piece 5033 rotates to the first position under the driving of the elastic reset member 5035, and the rotating connecting plate 5032 abuts against the side wall of the mounting groove 50311. At this time, the push piece 5033 can abut against the sample holder 100 inside the base 501. When the sample feeding detection plate 5073 corresponds to the third detection switch 5071, it indicates that the push piece mechanism 503 has moved to the original position. The controller controls the linear driving part 5021 to rotate forward, so that a new round of progressive feeding of the sample holder 100 can be started.

[0157] Of course, the forward or reverse rotation described above is the opposite of the two rotation directions, that is, counterclockwise or clockwise. The present embodiment is not limited specifically.

[0158] As shown in Figure 17 , taking the push piece 5033 in the solid line position and the push piece 5033 in the dashed line position as examples for illustration, the first position in the present embodiment is the position of the push piece 5033 shown by the solid line in Figure 17 , and the second position is the position of the push piece 5033 shown by the dashed line in Figure 17 .

[0159] The embodiment also discloses a control method of the sample injection device, comprising the following steps:

[0160] The linear driving mechanism 502 drives the pushing piece mechanism 503 to move intermittently along the length direction of the base 501, so that the pushing piece mechanism 503 intermittently abuts against the sample rack 100.

[0161] Therefore, the control method of the sample injection device can make the pushing piece 503 abut against the sample rack 100 to limit the movement or separation of the sample rack 100, so that the sample rack 100 moves intermittently to abut against the sample injection position, and the sample rack 100 can move intermittently / progressively, which can not only avoid too many sample racks 100 from flowing into the sample injection position due to too high injection speed, but also keep the sample rack 100 moving to the sample injection position, so as to ensure the uninterrupted operation of the sample injection position and improve the detection efficiency.

[0162] Specifically, the detection assembly 507 detects the position information of the pushing piece mechanism 503 and feeds back the position information to the controller, and the controller controls the moving direction of the linear driving mechanism 502 according to the position information, so as to control the moving direction of the pushing piece mechanism 503.

[0163] Since the structures of the linear driving mechanism 502, the pushing piece mechanism 503 and the detection assembly 507 have been described in detail above, no further description is given here.

[0164] More specifically, in the process that the linear driving mechanism 502 drives the sample injection detection plate 5073 to move from one end of the base 501 to the other end of the base 501, when the sample injection detection plate 5073 moves to correspond to the fourth detection switch 5072, the fourth detection switch 5072 transmits the detected position information to the controller, and the controller controls the linear driving mechanism 502 to move reversely; in the process that the linear driving mechanism 502 drives the sample injection detection plate 5073 to move from the other end of the base 501 to the one end of the base 501, when the sample injection detection plate 5073 moves to correspond to the third detection switch 5071, the third detection switch 5071 transmits the detected position information to the controller, and the controller controls the linear driving mechanism 502 to move forward, so that the moving direction of the pushing piece mechanism 503 can be controlled to reciprocate along the length direction of the base 501, and the use flexibility is high.

[0165] The sample delivery system of the embodiment comprises a conveying belt and the sample injection device of the embodiment, wherein the conveying belt is suitable for conveying the sample rack 100, the sample injection device is arranged on the side of the conveying belt, and the pushing piece mechanism 503 can abut against the sample rack 100. The sample delivery system of the embodiment can control the sample injection speed of the sample rack 100, so that the sample rack 100 can move to the sample injection position while avoiding too many sample racks 100 in the sample injection position, and the operation of the sample injection position can be ensured to be uninterrupted, and the detection efficiency is improved.

[0166] In this embodiment, two conveying belts are provided, which correspond to the emergency sample suction conveying belt 201 and the normal sample suction conveying belt 201 respectively, so as to meet different detection requirements. Correspondingly, two sample feeding devices are also provided, which are arranged on the sides of the two conveying belts, so as to abut and limit the sample racks 100 conveyed on the two conveying belts.

[0167] Further, the sample conveying system is also provided with a sample suction position, and the sample feeding device is arranged at the sample suction position, so as to block and limit the sample rack 100 moving towards the sample suction position, control the sample feeding speed of the front-end sample rack 100 entering the sample suction position, and make the sample rack 100 move into the sample suction position in an orderly manner. The sample suction device such as a sampling needle can suck the sample in the sample rack 100 abutted by the sample feeding device. The sample feeding device has a sample rack 100 advancing function, and the sample suction device such as a sampling needle is automatically advanced to the next sample after sucking one sample each time, so as to facilitate continuous sampling of the sample suction device. In this way, the number of sample racks 100 in the sample suction position is avoided to be too much, and the orderly operation of the sample suction position is ensured.

[0168] It should be noted that in other embodiments, the intermittent movement can also be understood as a variable speed movement of the linear driving part 5021, that is, an alternating fast and slow movement. When the linear driving part 5021 moves slowly, the sample rack 100 is abutted and limited by the material pushing and pushing piece mechanism 503. When the linear driving part 5021 moves quickly, the sample rack 100 is avoided by the material pushing and pushing piece mechanism 503.

[0169] It can be understood that the above description is the optimal technical solution of the embodiment, and in addition:

[0170] In some embodiments, the linear driving mechanism 502 includes a linear driving part 5021, a driving sprocket, a driven sprocket and a transmission chain. The linear driving part 5021 is arranged on the base 501, the driving sprocket and the driven sprocket are rotatably arranged on the base 501, the driving sprocket is in transmission connection with the linear driving part 5021, the transmission chain is sleeved on the driving sprocket and the driven sprocket, and the transmission chain is connected with the material pushing and pushing piece mechanism 503, so as to drive the material pushing and pushing piece mechanism 503 to move.

[0171] In some embodiments, the linear driving mechanism 502 includes a linear driving part 5021, a gear and a rack. The linear driving part 5021 is arranged on the base 501, the gear is in transmission connection with the linear driving part 5021, and the rack is movably arranged on the base 501. The rack is in engagement with the gear, and the rack is connected with the material pushing and pushing piece mechanism 503, so as to drive the material pushing and pushing piece mechanism 503 to move.

[0172] In some embodiments, the linear driving mechanism 502 comprises a motor and a screw rod, the motor drives the screw rod to rotate, the screw rod is threadedly connected with the pushing piece mechanism 503, and the pushing piece mechanism 503 can also be driven to move along the axial direction of the screw rod by the rotation of the screw rod.

[0173] In some embodiments, the other end of the elastic reset member 5035 is connected with the pushing piece 5033, and when the pushing piece 5033 drives the rotating connecting plate 5032 to rotate to the second position, the elastic reset member 5035 is stretched or compressed by the pushing piece 5033.

[0174] In some embodiments, the elastic reset member 5035 and the pushing piece 5033 are arranged on the same side of the pushing piece rotating shaft 5036, and when the pushing piece 5033 drives the rotating connecting plate 5032 to rotate to the second position, the elastic reset member 5035 is stretched.

[0175] In some embodiments, the reset bearing 5043 can also be replaced by a roller, and the roller is in rolling cooperation with the pushing piece 5033.

[0176] In some embodiments, the guide structure 506 is a guide rod, and the connecting seat 505 is slidingly sleeved on the guide rod, so that the movement of the connecting seat 505 can be guided.

[0177] In some embodiments, the sample injection detection plate 5073 and the connecting seat 505 are respectively connected to two sides opposite to the movement direction of the transmission belt 5024. That is, the sample injection detection plate 5073 and the pushing piece mechanism 503 are driven by the transmission belt 5024 to move in opposite directions, when the sample injection detection plate 5073 corresponds to the third detection switch 5071, the third detection switch 5071 detects that the pushing piece mechanism 503 moves to one end of the driven pulley 5023, and when the sample injection detection plate 5073 corresponds to the fourth detection switch 5072, the fourth detection switch 5072 detects that the pushing piece mechanism 503 moves to one end of the driving pulley 5022.

[0178] The third detection switch 5071 and the fourth detection switch 5072 are arranged as photoelectric sensors or proximity switches.

[0179] The sample suction conveying belts 201 have two, and the conveying directions of the two sample suction conveying belts 201 are consistent. One is an emergency sample suction conveying belt 201, and the other is a conventional sample suction conveying belt 201. The test efficiency of rapid test of emergency samples can be improved.

[0180] In the embodiment, at least one of the conveying belts is a return conveying belt 202, the conveying direction of the return conveying belt 202 is opposite to the conveying direction of the sample conveying belt 201; the return conveying belt 202 is provided with a fourth sample rack detection switch 211 at one end close to the automatic rail changing device 203; wherein the rail changing channel 304 is in communication with the return conveying belt 202, when the fourth sample rack detection switch 211 is triggered and the rail changing detection switch 307 is not triggered, the rail changing channel 304 can be moved back to the initial position. The rail changing channel 304 can be moved back to the initial position after the sample rack moves to the return conveying belt 202, and the return channel 308 of the automatic rail changing device 203 is driven by the return reset structure 3010 to return to the initial position in communication with the return conveying belt 202.

[0181] In the embodiment, the baffle 205 is provided with a second limiting long hole extending along the conveying direction of the return conveying belt 202; the end of the return conveying belt 202 away from the automatic rail changing device 203 is provided with a blocking pushing device 215, the blocking pushing device 215 includes a blocking pushing seat 601, a blocking driving mechanism 602 and a blocking pushing plate 603; the blocking pushing seat 601 is arranged on the rack 204 and located outside the conveying guide groove surrounded by the return conveying belt 202; the blocking driving mechanism 602 is arranged on the blocking pushing seat 601; one end of the blocking pushing plate 603 is movably connected with the blocking pushing seat 601, and the other end has a blocking pushing position extending on the return conveying belt 202 through the second limiting long hole and a separation position away from the return conveying belt 202; the blocking driving mechanism 602 is in transmission connection with the blocking pushing plate 603 to drive the blocking pushing plate 603 to reciprocate along the conveying direction of the return conveying belt 202.

[0182] In the embodiment, the fifth sample rack detection switch 212 is arranged close to the blocking propulsion device 215, and the third blocking limiting mechanism 213 is arranged between the blocking propulsion device 215 and the fourth sample rack detection switch 211. When the fourth sample rack detection switch 211 is triggered, the fifth sample rack detection switch 212 is not triggered, and the blocking propulsion device 215 is in the blocking propulsion position, the third blocking limiting mechanism 213 is in the release position. When the fifth sample rack detection switch 212 is triggered, if the downstream unit connected with the return conveying belt 202 is not communicated with the return conveying belt 202, the blocking propulsion plate 603 is in the blocking propulsion position to block the moving front end of the sample rack. When the fifth sample rack detection switch 212 is triggered, if the downstream unit connected with the return conveying belt 202 is communicated with the return conveying belt 202, the blocking propulsion plate 603 is first in the separation position for a predetermined time, and then the blocking propulsion plate 603 is in the blocking propulsion position and pushes the sample rack 100 to the moving end. The blocking propulsion device 215 can block the sample rack 100 and push the sample rack 100 to the downstream unit.

[0183] Obviously, the above embodiment is only an example for clearly illustrating, but not limit the embodiments. For those skilled in the field, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments are not required to be exhausted, and the obvious changes or variations still fall within the protection scope of the present application.

Claims

1. A sample delivery system, characterized by, The application relates to a sample rack conveying device, which comprises the following parts: a conveying belt suitable for conveying sample racks (100); a sample feeding device arranged on the side of the conveying belt and suitable for controlling the sample feeding speed of the sample racks (100) on the conveying belt; a blocking and limiting mechanism arranged on the side of the conveying belt and located upstream and / or downstream of the sample feeding device along the conveying direction of the conveying belt, which has a blocking position for limiting the movement of the sample racks (100) and a release position for releasing the movement of the sample racks (100); an automatic track changing device (203), which comprises a track changing channel (304) and a track changing driving structure (303); the conveying belt has at least two parallel conveying belts, and the automatic track changing device (203) is located at one end of the conveying belt along the conveying direction of the conveying belt; the track changing channel (304) is suitable for communicating with different conveying belts under the driving of the track changing driving structure (303); at least one of the conveying belts is a sample suction conveying belt (201), which is sequentially provided with a first buffer area and a sample suction area along the conveying direction, and the position corresponding to a sample suction device in the sample suction area is a sample suction position; the first buffer area is arranged on the side away from the automatic track changing device (203), the first buffer area is provided with a first sample rack detection switch (206), a first blocking and limiting mechanism (207) is arranged between the first buffer area and the sample suction area, the sample suction area is provided with a second sample rack detection switch (208), and the side of the sample suction area is provided with a sample feeding device (214); when the first sample rack detection switch (206) is triggered and the second sample rack detection switch (208) is not triggered, the first blocking and limiting mechanism (207) is in the release position; when the second sample rack detection switch (208) is triggered, the first blocking and limiting mechanism (207) is in the blocking position; when the second sample rack detection switch (208) is triggered, the sample feeding device (214) controls multiple sample positions on the sample rack (100) to pass through the sample suction position intermittently; the sample suction conveying belt (201) is further provided with a second buffer area, the second buffer area is arranged between the sample suction area and the automatic track changing device (203), the second buffer area is provided with a third sample rack detection switch (210), and a second blocking and limiting mechanism (209) is arranged between the sample suction area and the second buffer area; when all the sample positions pass through the sample suction position and the third sample rack detection switch (210) is not triggered, the sample feeding device (214) releases the sample rack (100); when all the sample positions pass through the sample suction position and the third sample rack detection switch (210) is triggered, the sample feeding device (214) controls the sample rack (100) to wait in the sample suction area; the track changing channel (304) is provided with a track changing detection switch (307). When the third sample rack detection switch (210) is triggered and the variable track passage (304) is not in communication with the current sample suction conveying belt (201), and / or the variable track detection switch (307) is triggered, the second blocking limiting mechanism (209) is in the blocking position; when the third sample rack detection switch (210) is triggered and the variable track passage (304) is in communication with the current sample suction conveying belt (201), and the variable track detection switch (307) is not triggered, the second blocking limiting mechanism (209) is in the release position.

2. The sample delivery system of claim 1, wherein, Further comprising: a rack (204); a baffle (205) connected to the rack (204) and located on both sides of the conveying belt to form a conveying guide groove with the conveying belt; wherein the sample feeding device and the blocking limiting mechanism are both arranged on the rack (204) and located outside the conveying guide groove.

3. The sample delivery system of claim 2, wherein, The baffle (205) is provided with a limiting opening (2051), and the blocking limiting mechanism comprises: a mounting rack (401) arranged on the rack (204) and located outside the conveying guide groove; a limiting driving assembly (402) arranged on the mounting rack (401); a limiting baffle (403) rotationally connected to one end of the mounting rack (401) and having the other end provided with the blocking position for blocking the movement of the sample rack (100) through the limiting opening (2051) and the release position for releasing the movement of the sample rack (100) by exiting the limiting opening (2051); the limiting driving assembly (402) is in transmission connection with the limiting baffle (403) to drive the limiting baffle (403) to rotate around the connection point between the limiting baffle (403) and the mounting rack (401).

4. The sample delivery system of claim 2, wherein, The variable track passage (304) is provided with a blocking mechanism (305) at an end away from the conveying belt, which is adapted to block the end of the variable track passage (304) away from the conveying belt; wherein when the variable track passage (304) is in communication with the current sample suction conveying belt (201), the blocking mechanism (305) blocks the end of the variable track passage (304) away from the conveying belt.

5. The sample delivery system of claim 4, wherein, The sample suction conveying belt (201) has at least two; wherein when the variable track passage (304) is moved to be in communication with the target sample suction conveying belt (201) and the variable track detection switch (307) is triggered, if the third sample rack detection switch (210) of the target sample suction conveying belt (201) is not triggered, the second blocking limiting mechanism (209) of the target sample suction conveying belt (201) is in the release position; if the third sample rack detection switch (210) of the target sample suction conveying belt (201) is triggered, the second blocking limiting mechanism (209) of the target sample suction conveying belt (201) is in the blocking position.

6. The sample transport system according to any one of claims 2 to 5, characterized in that The baffle (205) on the side of the sample suction conveying belt (201) is provided with a first limiting long hole (2052) extending along the conveying direction of the sample suction conveying belt (201), and the sample feeding device (214) comprises: a base (501) arranged on the rack (204) and located outside the conveying guide groove surrounded by the sample suction conveying belt (201); a linear driving mechanism (502) arranged on the base (501); a pushing piece mechanism (503) adapted to abut against the sample rack (100) through the first limiting long hole (2052), and the linear driving mechanism (502) is in driving connection with the pushing piece mechanism (503) to drive the pushing piece mechanism (503) to reciprocate along the conveying direction of the conveying belt.

7. The sample transport system according to any one of claims 1 to 5, characterized in that, The sample suction conveying belt (201) has two conveying directions.

8. The sample transport system of any of claims 2-5, wherein, At least one of the conveying belts is a return conveying belt (202), and the conveying direction of the return conveying belt (202) is opposite to that of the sample suction conveying belt (201); one end of the return conveying belt (202) close to the automatic rail changing device (203) is provided with a fourth sample rack detection switch (211); The rail changing channel (304) is in communication with the return conveying belt (202), and when the fourth sample rack detection switch (211) is triggered and the rail changing detection switch (307) is not triggered, the rail changing channel (304) returns to the initial position.

9. The sample delivery system of claim 8, wherein, The baffle (205) is provided with a second limiting long hole extending along the conveying direction of the return conveying belt (202); one end of the return conveying belt (202) away from the automatic rail changing device (203) is provided with a blocking and advancing device (215), and the blocking and advancing device (215) comprises: a blocking and advancing seat (601) arranged on the rack (204) and located outside the conveying guide groove surrounded by the return conveying belt (202); a blocking and driving mechanism (602) arranged on the blocking and advancing seat (601); a blocking and advancing plate (603) having one end movably connected with the blocking and advancing seat (601) and the other end having a blocking and advancing position extending through the second limiting long hole and arranged on the return conveying belt (202) and a separation position away from the return conveying belt (202); the blocking and driving mechanism (602) is in driving connection with the blocking and advancing plate (603) to drive the blocking and advancing plate (603) to reciprocate along the conveying direction of the return conveying belt (202).

10. The sample delivery system of claim 9, wherein, The blocking and advancing device (215) and the fourth sample rack detection switch (211) are provided with a fifth sample rack detection switch (212) and a third blocking and limiting mechanism (213), and the fifth sample rack detection switch (212) is arranged close to the blocking and advancing device (215). When the fourth sample rack detection switch (211) is triggered, the fifth sample rack detection switch (212) is not triggered, and the blocking advancing device (215) is in the blocking advancing position, the third blocking limit mechanism (213) is in the release position; When the fifth sample rack detection switch (212) is triggered, if the downstream unit connected with the return conveying belt (202) is not communicated with the return conveying belt (202), the blocking advancing plate (603) is in the blocking advancing position to block the movement front end of the sample rack; when the fifth sample rack detection switch (212) is triggered, if the downstream unit connected with the return conveying belt (202) is communicated with the return conveying belt (202), the blocking advancing plate (603) is first in the separation position for a predetermined time, and then the blocking advancing plate (603) is in the blocking advancing position and pushes the sample rack (100) to the movement end.

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