Pipette tip separating device

Abstract

The utility model discloses a pipette tip separating device, which relates to the technical field of pipette tip blanking devices, and comprises a fixed bottom plate, a middle movable plate and a fixed panel, and the fixed bottom plate is provided with a movable plate vertical driving device and a bottom plate fixing transverse guide rail. The bottom plate fixing transverse guide rail is connected with a clamping jaw body and a clamping jaw driving block in a sliding mode, the clamping jaw driving block is provided with a driving block rail groove, the middle moving plate is provided with a moving plate fixing bearing, and the moving plate fixing bearing is connected into the driving block rail groove in a sliding mode; a movable plate fixing transverse guide rail is arranged on the middle movable plate, the movable plate fixing transverse guide rail is in sliding connection with a separation clamping jaw body and a separation clamping jaw driving block, a separation driving block bearing is fixed to the separation clamping jaw driving block, a panel rail groove is formed in the fixed panel, and the separation driving block bearing is in sliding connection into the panel rail groove. According to the utility model, the two double-insertion pipetting tips can be effectively separated, and then the two pipetting tips are discharged again.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid transfer tip feeding devices, in particular to a liquid transfer tip separation device. Background Art

[0002] Pipette tips are commonly used consumables in laboratories. They are used to transfer liquids between different containers. They are often used in scenarios that require moving liquids, such as biology, chemistry, agriculture, forestry, and medical testing. Pipette tips can prevent cross-contamination between samples.

[0003] Usually, pipette tips are placed in tip boxes for use. However, boxed tips are expensive, so laboratory personnel will purchase bulk bagged tips and manually place the tips in boxes for use. However, this operation is inefficient and labor-intensive, and there is also a risk of contaminating the tips.

[0004] To this end, existing patents provide relevant equipment for automatically packing bulk tips into boxes, including but not limited to "a pipette tip arranging robot" disclosed in patent number CN110857154B, "a two-in-one pipette tip arranging robot" disclosed in patent number CN210133649U, and "a fully automatic pipette tip arranging machine" disclosed in patent number CN208217097U.

[0005] However, the commonly used specifications of existing pipette tips are 10μL, 200μL, 350μL, 1000μL, 1250μL, etc. The above existing patents can only solve the arrangement and boxing of pipette tips with a size of 350μL and below. However, when arranging large-sized pipette tips with a size of 1000μL and above, the boxing efficiency is usually low or even fails because of the large size of the tips and the fact that two tips are easily inserted together and cannot be separated during the arrangement process.

[0006] Therefore, there is an urgent need in the art for a pipette tip separation device to solve the above problems. Utility Model Content

[0007] The utility model aims to provide a liquid transfer tip separation device to solve the problems existing in the prior art, and can separate two double-inserted liquid transfer tips and then discharge them one by one.

[0008] To achieve the above purpose, the utility model provides the following solutions:

[0009] The utility model discloses a liquid transfer tip separation device, comprising a fixed bottom plate and an intermediate movable plate;

[0010] The fixed bottom plate is provided with a moving plate vertical driving device, a suction head clamping claw and a clamping claw driving device, the moving plate vertical driving device is used to drive the middle moving plate to move up and down, and the clamping claw driving device is used to drive the suction head clamping claw to clamp the suction head in the lower middle of the double-insert liquid transfer suction head;

[0011] The middle movable plate is provided with a tip separation clamp and a separation clamp driving device, and the separation clamp driving device is used to drive the tip separation clamp to clamp the upper tip in the double-insertion liquid transfer tip and can drive the upper tip in the double-insertion liquid transfer tip to move upward.

[0012] Preferably, the clamping jaw driving device includes a base plate fixed transverse guide rail, and a base plate first transverse slider and a base plate second transverse slider are slidably connected on both sides of the base plate fixed transverse guide rail, and the two base plate first transverse sliders are located between the two base plate second transverse sliders, and the suction head clamping jaw includes two clamping jaw bodies, the clamping jaw body is fixed on the base plate first transverse slider, and the clamping jaw driving block is fixed on the base plate second transverse slider, the clamping jaw body and the clamping jaw driving block are connected by a clamping driving connecting piece, and each of the clamping jaw driving blocks is provided with a driving block track groove, and a moving plate fixed bearing is respectively provided on both sides of the intermediate moving plate, and the two moving plate fixed bearings are respectively slidably connected to the two driving block track grooves.

[0013] Preferably, the separation jaw driving device includes a movable plate fixed transverse guide rail arranged on the intermediate movable plate, and the two ends of the movable plate fixed transverse guide rail are respectively slidably connected with a movable plate transverse first slider and a movable plate transverse second slider, and the two movable plate transverse first sliders are located between the two movable plate transverse second sliders, and the suction head separation jaw includes two separation jaw bodies, the separation jaw body is fixed on the movable plate transverse first slider, and the separation jaw driving block is fixed on the movable plate transverse second slider, the separation jaw body and the separation jaw driving block are connected by a separation driving connecting piece, and each separation jaw driving block is fixed with a separation driving block bearing, and also includes a fixed panel, and a panel track groove is respectively provided on both sides of the fixed panel, and the two separation driving block bearings are respectively slidably connected to the two panel track grooves.

[0014] Preferably, a plurality of suction head detection devices are provided on the intermediate movable plate, and the suction head detection devices are photoelectric sensors or proximity sensors.

[0015] Preferably, the panel track groove comprises a panel vertical groove and a panel oblique groove, and the upper end of the panel oblique groove is fixed to the lower end of the panel vertical groove;

[0016] The driving block track groove comprises an upper driving block inclined groove, a vertical driving block groove and a lower driving block inclined groove. The lower end of the upper driving block inclined groove and the upper end of the lower driving block inclined groove are respectively fixed to the upper and lower ends of the vertical driving block groove.

[0017] Preferably, the movable plate vertical driving device includes a movable plate driving motor, the movable plate driving motor is fixed on the fixed base plate, the output shaft of the movable plate driving motor is connected to a driving screw, the driving screw is threadedly connected to a driving nut, and the driving nut is fixed to one side of the intermediate movable plate.

[0018] Preferably, at least one movable plate vertical guide rail is fixed on the fixed bottom plate, and at least one movable plate vertical slider is provided on a surface of the intermediate movable plate close to the fixed bottom plate, and the movable plate vertical sliders are respectively slidably connected to the movable plate vertical guide rail.

[0019] Preferably, the clamping drive connecting member and the separation drive connecting member are both springs.

[0020] Preferably, the suction head clamping jaw and the suction head separating jaw, after closing, clamp a cylinder or cone with a diameter ranging from 5 mm to 11 mm.

[0021] Preferably, a nozzle opening and closing driving device is fixed on a side of the fixed bottom plate away from the intermediate movable plate, an nozzle opening and closing driving device is connected to a nozzle opening and closing body at the lower end, and a magnetic suction type feeding tube back plate is connected to a side of the fixed panel away from the intermediate movable plate;

[0022] The opening and closing mouth driving device includes an opening and closing driving motor, an opening and closing driving rotating arm, a flexible belt, an opening and closing rotating block and a rotating block fixing seat, the opening and closing driving motor and the rotating block fixing seat are both fixed to the fixed bottom plate, one end of the opening and closing driving rotating arm is fixed to the output shaft of the opening and closing driving motor, the other end of the opening and closing driving rotating arm is connected to the lower end of the opening and closing mouth body through the flexible belt, the opening and closing rotating block is rotatably connected to the rotating block fixing seat, and one end of the opening and closing rotating block is connected to the opening and closing mouth body through a connecting piece.

[0023] Compared with the prior art, the utility model has achieved the following technical effects:

[0024] The utility model can detect whether there are two pipette tips inserted together in the delivered pipette tips through at least one pipette tip detection device. If there is, the clamping claw body is used to clamp the pipette tip located at the bottom, and then the separation claw body is used to clamp the pipette tip above, and drive the pipette tip above to move upward, so as to separate the two, and then the pipette tips can be fed one by one, and the work efficiency of box loading can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 This is a front view of a pipette tip separation device according to an embodiment of the utility model;

[0027] Figure 2 This is a front view of the pipette tip separation device according to the embodiment of the utility model after the fixed panel is hidden;

[0028] Figure 3 This is a schematic diagram of the structure of the opening and closing nozzle drive device in the liquid transfer tip separation device of the embodiment of the utility model;

[0029] Figure 4 It is a side view of the opening and closing nozzle body of the liquid transfer tip separation device of the embodiment of the utility model when it is closed;

[0030] Figure 5 It is a side view of the opening and closing nozzle body of the pipette tip separation device of the embodiment of the utility model when it is opened;

[0031] Figure 6 This is a schematic diagram of the pipette tip separation device of the utility model in the clamping process;

[0032] Figure 7 This is a schematic diagram of the pipette tip separation device of the utility model embodiment when it is in the separation process;

[0033] In the figure: 1-magnetic feeding tube back plate; 101-feeding guide groove; 2-fixed bottom plate; 201-bottom plate fixed transverse guide rail; 2011-bottom plate transverse first slider; 2012-bottom plate transverse second slider; 2013-clamping jaw body; 2014-clamping jaw driving block; 20141-driving block track groove; 2015-clamping driving connector; 3-moving plate driving motor; 4-driving screw rod; 5-driving nut; 6-moving plate vertical guide rail; 7-moving plate vertical slider; 8-middle moving plate; 801-moving plate fixed transverse guide rail; 8 011-the first horizontal slider of the moving plate; 8012-the second horizontal slider of the moving plate; 8013-the separation jaw body; 8014-the separation jaw driving block; 80141-the separation driving block bearing; 8015-the separation driving connecting piece; 802-the moving plate fixed bearing; 803-the first photoelectric sensor; 804-the second photoelectric sensor; 9-the fixed panel; 901-the panel track groove; 10-the opening and closing driving motor; 11-the opening and closing driving rotating arm; 12-the flexible belt; 13-the opening and closing mouth body; 14-the opening and closing rotating block; 15-the rotating block fixing seat. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] The utility model aims to provide a liquid transfer tip separation device to solve the problems existing in the prior art, and can separate two double-inserted liquid transfer tips and then discharge them one by one.

[0036] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0037] like Figure 1-Figure 7 As shown, this embodiment provides a pipette tip separation device, including a fixed bottom plate 2 and an intermediate movable plate 8, wherein the fixed bottom plate 2 is fixed on a cartoning machine frame, and the intermediate movable plate 8 can move up and down.

[0038] A moving plate vertical driving device, a pipette tip clamping claw and a clamping claw driving device are provided on the fixed bottom plate 2. The moving plate vertical driving device is used to drive the middle moving plate to move up and down, and the clamping claw driving device is used to drive the pipette tip clamping claw to clamp the pipette tip in the middle and lower part of the double-insert pipette tip.

[0039] The middle movable plate 8 is provided with a tip separation jaw and a separation jaw driving device, and the separation jaw driving device is used to drive the tip separation jaw to clamp the upper tip in the double-insertion liquid transfer tip and can drive the upper tip in the double-insertion liquid transfer tip to move upward.

[0040] In this embodiment, the clamping jaw driving device includes a base plate fixed transverse guide rail 201, and both sides of the base plate fixed transverse guide rail 201 are slidably connected with a base plate first transverse slider 2011 and a base plate second transverse slider 2012. It can be understood that the base plate fixed transverse guide rail 201 is symmetrically distributed on both sides with the base plate fixed transverse guide rail 201 as the symmetry line, and each side is provided with a base plate first transverse slider 2011 and a base plate second transverse slider 2012, that is, a total of two base plate first transverse sliders 2011 and two base plate second transverse sliders 2012 are provided on the base plate fixed transverse guide rail 201, and the two base plate first transverse sliders 2011 are located between the two base plate second transverse sliders 2012. The tip clamping jaw includes two clamping jaw bodies 11, and a clamping jaw body 2013 is fixed on each of the first horizontal sliders 2011 of the bottom plate. The two clamping jaw bodies 2013 can be used to clamp the pipette tips located at the bottom of the double-inserted pipette tips. A clamping jaw driving block 2014 is fixed on the second horizontal slider 2012 of the bottom plate. The clamping jaw body 2013 is connected to the clamping jaw driving block 2014 through a clamping driving connector 2015, and the clamping jaw driving block 2014 drives the clamping jaw body 2013 to move through the clamping driving connector 2015. A driving block track groove 20141 is provided on each clamping jaw driving block 2014, and a moving plate fixed bearing 802 is provided on both sides of the intermediate moving plate 8. The two moving plate fixed bearings 802 are respectively slidably connected to the two driving block track grooves 20141. When the intermediate moving plate 8 moves up and down, it can push the moving plate fixed bearing 802 to move in the driving block track groove 20141, and further push the clamping jaw driving block 2014 to move.

[0041] In this embodiment, a movable plate fixed transverse guide rail 801 is provided on the middle movable plate 8, and a movable plate transverse first slider 8011 and a movable plate transverse second slider 8012 are slidably connected at both ends of the movable plate fixed transverse guide rail 801, and the movable plate fixed transverse guide rail 801 is also symmetrically distributed on both sides with the middle line of the movable plate fixed transverse guide rail 801 as the symmetry line, and a movable plate transverse first slider 8011 and a movable plate transverse second slider 8012 are provided on each side, that is, a total of two movable plate transverse first sliders 8011 and two movable plate transverse second sliders 8012 are provided on the movable plate fixed transverse guide rail 801, and the two movable plate transverse first sliders 8011 are located between the two movable plate transverse second sliders 8012. A separation clamp body 8013 is fixed on the movable plate transverse first slider 8011, and the two separation clamp bodies 8013 can be used to clamp the upper pipette tip in the double-inserted pipette tip and can drive it to move upward. A separation jaw driving block 8014 is fixed on the second horizontal slider 8012 of the moving plate, and the separation jaw body 8013 and the separation jaw driving block 8014 are connected by a separation driving connection member 8015, and the separation jaw driving block 8014 drives the separation jaw body 8013 to move through the separation driving connection member 8015. A separation driving block bearing 80141 is fixed on each separation jaw driving block 8014, and the fixed panel 9 is also included. The fixed bottom plate 2 and the fixed panel 9 can be fixedly connected by bolts, etc. The middle moving plate 8 is arranged between the fixed bottom plate 2 and the fixed panel 9, and the fixed panel 9 is located on the outside. A panel track groove 901 is respectively provided on both sides of the fixed panel 9, and two separation driving block bearings 80141 are respectively slidably connected to the two panel track grooves 901. When the middle moving plate 8 moves up and down, it will drive the separation driving block bearing 80141 to slide along the panel track groove 901, thereby driving the separation jaw driving block 8014 to move.

[0042] The actual use of the pipette tip separation device includes the clamping process and the separation process:

[0043] Clamping process: When the double-insert pipette tip falls into the pipette tip separation device, the retaining edge of the pipette tip is clamped by the opening and closing nozzle body 13 and the clamping protrusion of the magnetic suction type feeding tube back plate 1. At this time, the first detection device 803 and the second detection device 804 are blocked and triggered by the double-insert pipette tip at the same time. The middle moving plate 8 is driven to rise by the moving plate vertical drive device. During the rise of the middle moving plate 8, the separation drive block bearing 80141 slides in the panel track groove 901, so that the two separation drive block bearings 80141 will also move closer to the middle at the same time during the rise. Along with the movement of the separation drive block bearing 80141, the two separation jaw drive blocks 8014 will also push the separation jaw body 8013 to move closer to the middle through the separation drive connector 8015 until the two separation jaw bodies 8013 are closed and clamp the pipette tip located at the top of the double-insert pipette tip. At the same time, the moving plate fixed bearing 802 on the middle moving plate 8 will also move upward with the middle moving plate 8, and the moving plate fixed bearing 802 will also slide in the driving block track groove 20141, and push the clamping jaw driving block 2014 to move closer to the middle, and then the clamping jaw driving block 2014 will push the clamping jaw body 2013 to move toward the middle through the clamping driving connecting piece 2015, until the two clamping jaw bodies 2013 are closed and clamp the pipette tip located at the bottom of the double-inserted pipette tip. At this time, the state is as follows Figure 6 shown.

[0044] Separation process: After the clamping process is completed, the middle moving plate 8 continues to move upward, and drives the two separation jaw bodies 8013 to move upward while remaining closed. At the same time, the two clamping jaw bodies 2013 remain closed. During this process, the separation jaw bodies 8013 pull the two inserted pipette tips apart through friction or by clamping the retaining edge on the pipette tip. Then the middle moving plate 8 continues to move upward until the moving plate fixed bearing 802 contacts the oblique track at the end of the drive block track groove 20141, and pushes the clamping jaw drive block 2014 to move outward along the bottom plate fixed transverse guide rail 201 at the same time. The clamping jaw drive block 2014 pushes and pulls the clamping jaw body 2013 to open outward through the clamping drive connector 2015. During this process, the two separation clamping bodies always remain completely closed in the middle position until the middle moving plate 8 moves upward to the extreme position (such as Figure 7 As shown). At this time, the opening and closing nozzle driving device drives the opening and closing nozzle body 13 to open, and puts the lower pipette tip into the tip box. Then close the opening and closing nozzle body 13 and move to the next empty space in the tip box. The middle moving plate 8 is driven downward by the moving plate vertical driving device, and at this time the clamping jaw body 2013 and the separation jaw body 8013 are both opened and returned to their positions. At this time, the upper pipette tip falls into the opening and closing nozzle body 13. Open and close the nozzle body 13 again, and put the upper pipette tip into the tip box.

[0045] In this embodiment, a plurality of pipette tip detection devices are provided on the intermediate movable plate 8, and the pipette tip detection devices may be photoelectric sensors or proximity sensors. In this embodiment, two photoelectric sensors are provided, namely a first photoelectric sensor 803 and a second photoelectric sensor 804, which are used to detect whether there is a double-inserted pipette tip in the unloading pipeline.

[0046] In this embodiment, if Figure 1 As shown, the panel track groove 901 includes a panel vertical groove and a panel inclined groove, and the upper end of the panel inclined groove is fixed to the lower end of the panel vertical groove. When the pipette tip separation device is in the above-mentioned clamping process, the separation drive block bearing 80141 first moves upward along the panel inclined groove, and also moves closer to the middle during the upward movement, thereby pushing the separation jaw drive block 8014 to move closer to the middle, and driving the two separation jaw bodies 8013 to close to the middle. When the pipette tip separation device is in the above-mentioned separation process, when the separation drive block bearing 80141 moves to the lower end of the panel vertical groove, at this time, the two separation jaw bodies 8013 have clamped the pipette tip located above. At this time, when the middle moving plate 8 continues to be driven to move upward, the separation jaw body 8013 will pull the pipette tip located above upward, thereby realizing the separation process of the double-inserted pipette tip.

[0047] like Figure 2 As shown, the driving block track groove 20141 is a C-shaped groove (it can also be a V-shaped groove or other polygonal grooves), and the driving block track groove 20141 includes an upper inclined groove of the driving block, a vertical groove of the driving block, and a lower inclined groove of the driving block. The lower end of the upper inclined groove of the driving block and the upper end of the lower inclined groove of the driving block are respectively fixed to the upper and lower ends of the vertical groove of the driving block. When the liquid transfer suction head separation device is in the above-mentioned clamping process, as the middle moving plate 8 moves upward, the moving plate fixed bearing 802 moves upward along the lower inclined groove of the driving block and also moves outward, and the relative moving plate fixed bearing 802 will push the clamping jaw driving block 2014 to move inward. When the moving plate fixed bearing 802 moves to the top of the lower inclined groove of the driving block to the vertical groove of the driving block, the two clamping jaw bodies 2013 are always in a clamping state for the liquid transfer suction head located below. When the pipette tip separation device is in the above-mentioned separation process, as the middle moving plate 8 rises, the moving plate fixed bearing 802 also continuously moves from the vertical groove of the driving block to the upper inclined groove of the driving block. After the moving plate fixed bearing 802 enters the upper inclined groove of the driving block, it moves upward along the upper inclined groove of the driving block and also moves toward the center, thereby pushing the clamping claw body 2013 to move outward.

[0048] In this embodiment, the vertical driving device of the movable plate includes a movable plate driving motor 3, which is fixed on the fixed base plate 2. The output shaft of the movable plate driving motor 3 is connected to a driving screw 4, and a driving nut 5 is threadedly connected to the driving screw 4. The driving screw 4 and the driving nut 5 form a common screw-nut substructure, and the driving nut 5 is fixed on one side of the middle movable plate 8.

[0049] When the moving plate driving motor 3 is started, the output shaft of the moving plate driving motor 3 drives the driving screw 4 to rotate. Since the intermediate moving plate 8 has a limiting effect on the driving nut 5, preventing the driving nut 5 from rotating, the driving nut 5 can only move up and down along the axial direction of the driving screw 4 under the rotation of the driving screw 4.

[0050] In this embodiment, at least one movable plate vertical guide rail 6, specifically two, is fixed on the fixed bottom plate 2, and the two movable plate vertical guide rails 6 are vertically arranged and parallel to each other. At least one movable plate vertical slider 7, specifically two, is arranged on the side of the intermediate movable plate 8 close to the fixed bottom plate 2, and the two movable plate vertical sliders 7 are slidably connected to the two movable plate vertical guide rails 6, respectively. The purpose of setting the movable plate vertical guide rail 6 is to provide a limiting guide function for the intermediate movable plate 8, so that the intermediate movable plate 8 can only move up and down along the movable plate vertical guide rail 6.

[0051] In this embodiment, the clamping drive connecting member 2015 and the separation drive connecting member 8015 are both springs, or other elastic or rigid connecting members.

[0052] In other embodiments, the clamping drive connector 2015 and the separation drive connector 8015 may also be magnets, and the repulsive force between the two magnets is used to push the clamping jaw body or the separation jaw body to move.

[0053] In this embodiment, the suction head clamping jaw and the suction head separating jaw, after closing, clamp a cylinder or cone with a diameter ranging from 5 mm to 11 mm.

[0054] In this embodiment, an opening and closing nozzle driving device is fixed to the side of the fixed base plate 2 away from the middle movable plate 8, and the lower end of the opening and closing nozzle driving device is connected to the opening and closing nozzle body 13, and the opening and closing nozzle driving device can control the opening and closing of the opening and closing nozzle body 13, and the fixed panel 9 is connected to the side away from the middle movable plate 8 with a magnetic suction type discharge tube back plate 1, and a discharge tube channel is provided in the magnetic suction type discharge tube back plate 1, and the discharge tube channel and the opening and closing nozzle body 13 are used together to accommodate or control the discharge of the pipette tip in the magnetic suction type discharge tube back plate 1.

[0055] The opening and closing mouth driving device comprises an opening and closing driving motor 10, an opening and closing driving rotating arm 11, a flexible belt 12, an opening and closing rotating block 14 and a rotating block fixing seat 15. Among them, the opening and closing driving motor 10 and the rotating block fixing seat 15 are both fixed to the side of the fixed bottom plate 2 away from the intermediate movable plate 8. One end of the opening and closing driving rotating arm 11 is fixed to the output shaft of the opening and closing driving motor 10, and the other end of the opening and closing driving rotating arm 11 is connected to the lower end of the opening and closing mouth body 13 through the flexible belt 12. The opening and closing rotating block 14 is rotatably connected to the rotating block fixing seat 15, and one end of the opening and closing rotating block 14 is connected to the opening and closing mouth body 13 through a connecting piece, and the connecting piece can be a common plastic rod or sheet.

[0056] When the opening and closing mouth body 13 needs to be opened, Figure 4-Figure 5 As shown, the opening and closing driving motor 10 is started, the opening and closing driving motor 10 drives the opening and closing driving rotating arm 11 to rotate, and the opening and closing driving rotating arm 11 pulls the opening and closing mouth body 13 to open through the flexible belt 12.

[0057] In this embodiment, in order to be able to close the opened opening and closing mouth body 13, a fixed seat magnet is provided on the rotating block fixed seat 15, and a rotating block magnet is provided on the opening and closing rotating block 14. The fixed seat magnet and the rotating block magnet do not overlap, and the magnetic poles of the fixed seat magnet and the magnetic poles of the rotating block magnet are the same, so that the fixed seat magnet and the rotating block magnet always have a repulsive force.

[0058] When the opening and closing mouth body 13 is opened by the opening and closing mouth driving device, the rotating block magnet gradually approaches the fixed seat magnet, but the two do not overlap. Once the opening and closing driving motor 10 starts to rotate in the reverse direction, the flexible belt 12 will not apply a pulling force to the opening and closing mouth body 13, and the opening and closing rotating block 14 pushes the opening and closing mouth body 13 to close due to the repulsive force between the fixed seat magnet and the rotating block magnet.

[0059] In this embodiment, a material receiving guide groove 101 is provided at the upper end of the back plate 1 of the magnetic suction type feeding pipe, and its function is to enable the incoming pipette tip to enter the feeding pipe more easily.

[0060] In this embodiment, a panel magnet is provided on the fixed panel 9, and a feeding tube magnet is provided on the magnetic feeding tube back plate 1. The magnetic poles of the panel magnet and the feeding tube magnet are opposite. When installing the magnetic feeding tube back plate 1, it only needs to be attached to the fixed panel 9, and the installation is quick.

[0061] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A pipette tip separation device, characterized in that: It includes a fixed bottom plate and an intermediate movable plate; The fixed bottom plate is provided with a moving plate vertical driving device, a suction head clamping claw and a clamping claw driving device, the moving plate vertical driving device is used to drive the middle moving plate to move up and down, and the clamping claw driving device is used to drive the suction head clamping claw to clamp the suction head in the lower middle of the double-insert liquid transfer suction head; The middle movable plate is provided with a tip separation clamp and a separation clamp driving device, and the separation clamp driving device is used to drive the tip separation clamp to clamp the upper tip in the double-insertion liquid transfer tip and can drive the upper tip in the double-insertion liquid transfer tip to move upward.

2. The pipette tip separation device according to claim 1, characterized in that: The clamping jaw driving device includes a base plate fixed transverse guide rail, and both sides of the base plate fixed transverse guide rail are slidably connected with a base plate first transverse slider and a base plate second transverse slider, the two base plate first transverse sliders are located between the two base plate second transverse sliders, the suction head clamping jaw includes two clamping jaw bodies, the clamping jaw body is fixed on the base plate first transverse slider, and the clamping jaw driving block is fixed on the base plate second transverse slider, the clamping jaw body and the clamping jaw driving block are connected by a clamping driving connecting piece, each of the clamping jaw driving blocks is provided with a driving block track groove, and a moving plate fixed bearing is respectively provided on both sides of the intermediate moving plate, and the two moving plate fixed bearings are respectively slidably connected to the two driving block track grooves.

3. The pipette tip separation device according to claim 2, characterized in that: The separation jaw driving device includes a movable plate fixed transverse guide rail arranged on the intermediate movable plate, and two ends of the movable plate fixed transverse guide rail are respectively slidably connected with a movable plate transverse first slider and a movable plate transverse second slider, and the two movable plate transverse first sliders are located between the two movable plate transverse second sliders. The suction head separation jaw includes two separation jaw bodies, the separation jaw body is fixed on the movable plate transverse first slider, and the separation jaw driving block is fixed on the movable plate transverse second slider, the separation jaw body and the separation jaw driving block are connected by a separation driving connecting piece, and each separation jaw driving block is fixed with a separation driving block bearing, and also includes a fixed panel, and a panel track groove is respectively provided on both sides of the fixed panel, and the two separation driving block bearings are respectively slidably connected to the two panel track grooves.

4. The pipette tip separation device according to claim 1, characterized in that: The intermediate movable plate is provided with a plurality of suction head detection devices, and the suction head detection devices are photoelectric sensors or proximity sensors.

5. The pipette tip separation device according to claim 3, characterized in that: The panel track groove comprises a panel vertical groove and a panel inclined groove, and the upper end of the panel inclined groove is fixed to the lower end of the panel vertical groove; The driving block track groove comprises an upper driving block inclined groove, a vertical driving block groove and a lower driving block inclined groove. The lower end of the upper driving block inclined groove and the upper end of the lower driving block inclined groove are respectively fixed to the upper and lower ends of the vertical driving block groove.

6. The pipette tip separation device according to claim 1, characterized in that: The movable plate vertical driving device comprises a movable plate driving motor, the movable plate driving motor is fixed on the fixed base plate, the output shaft of the movable plate driving motor is connected with a driving screw, the driving screw is threadedly connected with a driving nut, and the driving nut is fixed on one side of the intermediate movable plate.

7. The pipette tip separation device according to claim 1, characterized in that: At least one movable plate vertical guide rail is fixed on the fixed bottom plate, and at least one movable plate vertical slider is provided on a surface of the intermediate movable plate close to the fixed bottom plate, and the movable plate vertical slider is slidably connected to the movable plate vertical guide rail.

8. The pipette tip separation device according to claim 3, characterized in that: The clamping drive connecting member and the separation drive connecting member are both springs.

9. The pipette tip separation device according to claim 1, characterized in that: The suction head clamping jaw and the suction head separating jaw, after being closed, clamp a cylinder or a cone with a diameter ranging from 5 mm to 11 mm.

10. The pipette tip separation device according to claim 3, characterized in that: A nozzle opening and closing driving device is fixed on one side of the fixed bottom plate away from the intermediate movable plate, an nozzle opening and closing driving device is connected to the lower end of the nozzle opening and closing driving device, and a magnetic suction type feeding tube back plate is connected to one side of the fixed panel away from the intermediate movable plate; The opening and closing mouth driving device includes an opening and closing driving motor, an opening and closing driving rotating arm, a flexible belt, an opening and closing rotating block and a rotating block fixing seat, the opening and closing driving motor and the rotating block fixing seat are both fixed to the fixed bottom plate, one end of the opening and closing driving rotating arm is fixed to the output shaft of the opening and closing driving motor, the other end of the opening and closing driving rotating arm is connected to the lower end of the opening and closing mouth body through the flexible belt, the opening and closing rotating block is rotatably connected to the rotating block fixing seat, and one end of the opening and closing rotating block is connected to the opening and closing mouth body through a connecting piece.

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