Experimental testing device capable of automatically adding liquid

Abstract

The invention belongs to the technical field of laboratory automatic liquid adding, and particularly relates to an automatic liquid adding experiment testing device which comprises a clamping assembly, a horizontal moving assembly, a vertical moving assembly and a vertical moving pair assembly, the clamping assembly is provided with a clamping device for clamping a container, a first lead screw and a first rail rod, and the bottom of the first lead screw and the bottom of the first rail rod are connected with the horizontal moving assembly; the vertical moving assembly comprises a second screw rod and a sliding seat, a cover clamping device is arranged on the sliding seat, and the sliding seat is connected with the second screw rod and is used for covering or detaching a container cover; the vertical moving pair assembly comprises a third lead screw, a connecting frame and a liquid adding frame, a liquid adding pipe is installed on the liquid adding frame and used for adding liquid into the container, and the liquid adding frame is connected with the third lead screw so that the liquid adding pipe can move up and down; the third lead screw is arranged on a connecting frame, the connecting frame is connected with a sliding seat, and the sliding seat drives the vertical moving pair assembly to move up and down through the connecting frame. The problems that in existing solution preparation, manual liquid transferring and liquid adding operation is tedious, and personal errors are large are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of automatic liquid adding in laboratories, and in particular relates to an automatic liquid adding experimental testing device. Background Art

[0002] Laboratory automation systems are widely used in clinical laboratories, biomedicine, environmental testing, food safety, chemical industry and other fields. In clinical laboratories, automation systems use automatic testing equipment and computers to automate measurement, experiment and data processing, including scientific experiments, simulation, image processing, automatic measurement, automatic inspection, control of experimental equipment, etc. In addition, automation systems are also used in scientific research institutions and medical institutions to improve scientific research efficiency and quality.

[0003] With the rapid development of downstream applications in life sciences, the laboratory field is facing huge challenges. Among them, solution configuration is a very important and basic experimental operation in detection and experiments, and it has a wide range of applications. At present, due to the differences in solution configuration (different specifications, different liquids used, and different volumes used), manual operations are generally used to manually pipette liquids. However, manual pipetting and liquid addition operations are not only cumbersome, but also involve many human errors, such as whether the amount of liquid transferred is accurate, whether liquid is lost during pipetting, how much liquid is left in the pipette, and so on. Therefore, this field urgently needs to develop a universal automated liquid addition device to improve the throughput, speed, accuracy and repeatability of the experiment. Summary of the invention

[0004] In view of the above problems, the present invention provides an automatic liquid adding experimental test device, comprising a clamping assembly, a horizontal moving assembly, a vertical moving assembly and a vertical moving subassembly, wherein the clamping assembly has at least one clamper for clamping a container, and the bottom of the clamping assembly is slidably connected to a first screw rod and a first track rod of the horizontal moving assembly, so that the clamper can move along the first track rod; A vertical moving assembly and a vertical moving sub-assembly are provided above the horizontal moving assembly. The vertical moving assembly includes a second screw rod, a sliding seat and at least one cover clamping device. The cover clamping device is provided on the sliding seat. The sliding seat is slidably connected to the second screw rod to drive the cover clamping device to move up and down to cover or remove the cover of the container; the vertical moving sub-assembly includes a third screw rod, a connecting frame and a liquid adding frame. At least one liquid adding tube is installed on the liquid adding frame for adding liquid into the container. The liquid adding frame is slidably connected to the third screw rod so that the liquid adding tube can move up and down; the third screw rod is provided on the connecting frame, and the connecting frame is connected to the sliding seat. The sliding seat can lead the vertical moving sub-assembly to move up and down through the connecting frame.

[0005] Optionally, the clamping assembly includes two clamps, two support rods and a sliding base from top to bottom, the two clamps are arranged side by side, the two support rods are arranged side by side, and the clamps are horizontally arranged on the top of the support rods for clamping the container; the sliding base is perpendicular to the support rods, and the two ends of the sliding base are respectively connected to a support rod, the support rods are vertically arranged, and the two ends of the sliding base are respectively provided with a through hole, so that the two first rail rods can respectively pass through the through holes, and the sliding base is slidably connected to the two first rail rods.

[0006] Further optionally, a horizontal connecting plate 2 is provided below the two clamps, and the connecting plate 2 is parallel to the connecting plate 1, and the two ends of the connecting plate 2 are respectively connected to two support rods; two sensors 1 are provided on the connecting plate 2, and the sensors 1 correspond to the clamps one by one, and the sensing head of the sensor 1 faces the front of the clamp, and is used to sense whether there is a container in front of the clamp.

[0007] Optionally, the horizontal movement assembly includes a first motor, a first screw rod, two first track rods and two support plates, the first motor and the two support plates are arranged on the base plate in sequence along the length direction of the first track rod; the first screw rod and the two first track rods are parallel to each other and are all arranged horizontally, the first screw rod is between the two first track rods, the first track rod passes through the through hole of the sliding base, and the first screw rod passes through the threaded hole of the sliding base.

[0008] Optionally, the vertical moving assembly includes a support frame, a base, a second motor and two clamping cover devices, the bottom of the base is arranged on the bottom, and the top of the base is connected to the support frame; the support frame is a square frame, including two upper and lower horizontal support plates 2 and two vertical second track rods, the sliding seat is horizontally arranged, and the two ends of the sliding seat are respectively slidably connected to the two second track rods, the second motor is arranged on the upper support plate 2, the top end of the second screw rod is connected to the second motor, the second screw rod passes through the upper support plate 2 and the sliding seat, and the second motor drives the sliding seat to move up and down through the second screw rod; the two clamping cover devices are connected to the side of the sliding seat facing the clamping assembly.

[0009] Further optionally, the clamping cover device includes a third motor and a clamping head, the rotating shaft of the third motor is vertically downward, the clamping head is connected to the bottom end of the rotating shaft of the third motor, and the third motor can drive the clamping head to rotate; The chuck has a built-in electromagnetic controller, which is connected to the two second clamping jaws of the chuck to control the two second clamping jaws to move closer to or farther away from each other so as to clamp or release the bottle cap on the top of the container.

[0010] Optionally, the vertical movement sub-assembly also includes a fourth motor, two liquid adding tubes and two vertical third track rods. The connecting frame is a C-shaped frame. The middle part of the connecting frame is connected to the front of the sliding seat. The fourth motor is arranged above the connecting frame. The third track rod connects the top and bottom of the opening of the connecting frame. A vertical third screw rod is provided between the two third track rods. The third screw rod passes through the top of the connecting frame and is then connected to the rotating shaft of the fourth motor. The liquid adding frame is horizontally arranged, the third screw rod and the two third track rods pass through the liquid adding frame, and the liquid adding tubes are detachably installed at both ends of the liquid adding frame. The bottom end of the liquid adding tube is open, and the top end is connected to an external liquid storage container through a pipeline.

[0011] Further optionally, the connecting frame includes two horizontal cross plates and a vertical vertical plate, the upper and lower ends of the vertical plate are respectively fixedly connected to the ends of the upper and lower cross plates, the head ends of the two cross plates point to the clamping assembly, and the upper and lower ends of the third track rod are respectively connected to the head ends of the upper and lower cross plates.

[0012] Further optionally, a limit sub-component is provided on the vertical side surface of the liquid adding rack facing the clamping assembly, and the limit sub-component includes a vertical baffle, and the upper middle portion of the baffle extends upward from the liquid adding rack; A limit female part is arranged on the vertical side surface of the head end of the upper horizontal plate facing the clamping assembly. The limit female part has a groove. A second sensor is arranged in the groove for sensing the blocking piece moved into the groove.

[0013] Optionally, the inner walls of the through holes of the sliding base, the sliding seat and the liquid adding rack are provided with two circles of recessed grooves, which protrude toward the outside of the through hole, and the two circles of grooves are respectively close to the two ends of the through hole; a number of balls are embedded in the grooves, the balls are spherical, adjacent balls are in contact with each other, part of the balls are in the grooves, and the other part extends out of the grooves and can contact the corresponding first track rod or the second track rod or the third track rod.

[0014] Optionally, a sensor 3 is hung on the side of the liquid adding rack away from the clamping assembly, the sensor 3 is located below the liquid adding rack, and the sensing surface of the sensor 3 faces the clamping assembly; A telescopic support device is provided on the lower horizontal plate of the connecting frame, and the telescopic support device includes a support base, a telescopic sleeve and a plurality of vertical secondary telescopic rods. The telescopic sleeve is sleeved on the outside of the third screw rod, and a support ring is provided on the top of the telescopic sleeve for supporting the liquid adding rack; the top of the secondary telescopic rod is connected to the support ring, and the bottom of the secondary telescopic rod is connected to the support base, and the support base controls the secondary telescopic rod to extend and retract up and down, so as to drive the top of the telescopic sleeve to rise and fall, and adjust the height of the telescopic sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the experimental test device for automatic liquid addition; Figure 2is a side schematic diagram of the experimental test device; Figure 3 is a schematic diagram of a vertically movable subassembly; Figure 4 It is a schematic diagram of two deviation correctors on a sliding base; Figure 5 is a schematic diagram of a first deviation corrector; Figure 6 A schematic diagram of a telescopic support device.

[0016] In the accompanying drawings, 1-clamp, 2-volume bottle, 3-first screw rod, 4-second screw rod, 5-third screw rod, 6-first track rod, 7-second track rod, 8-third track rod, 9-first motor, 10-second motor, 11-third motor, 12-fourth motor, 13-sliding seat, 14-sliding base, 15-liquid adding rack, 16-cap clamping device, 17-connecting rack, 18-liquid adding tube, 19-bottom plate, 20-pillar, 21-support rod, 22-connecting plate 1, 23-connecting plate 2, 24-sensor 1, 2 5-auxiliary telescopic rod, 26-telescopic sleeve, 27-support plate one, 28-support block, 29-support base, 30-chain groove, 31-support plate two, 32-chuck, 33-support ring, 34-horizontal plate, 35-vertical plate, 36-limiting sub-component, 37-limiting mother component, 38-blocking plate, 39-groove, 40-ball, 41-first end, 42-first through hole, 43-first deviation corrector, 44-first tunnel, 45-telescopic rod, 46-bottom surface, 47-controller two, 48-support, 49-second deviation corrector. DETAILED DESCRIPTION

[0017] This embodiment provides an automatic liquid adding experimental test device, such as Figure 1-Figure 6 As shown, it includes a clamping assembly, a horizontal moving assembly, a vertical moving assembly and a vertical moving sub-assembly, the clamping assembly has at least one clamp 1 for clamping a container, and the bottom of the clamping assembly is slidably connected to a first screw rod 3 and a first track rod 6 of the horizontal moving assembly, so that the clamp 1 can move along the first track rod 6; A vertical moving assembly and a vertical moving sub-assembly are provided above the horizontal moving assembly. The vertical moving assembly includes a second screw rod 4, a sliding seat 13 and at least one cover clamping device 16. The cover clamping device 16 is provided on the sliding seat 13. The sliding seat 13 is slidably connected to the second screw rod 4 to drive the cover clamping device to move up and down to cover or remove the lid of the container; the vertical moving sub-assembly includes a third screw rod 5, a connecting frame 17 and a liquid adding frame 15. At least one liquid adding tube 18 is installed on the liquid adding frame 15 for adding liquid into the container. The liquid adding frame 15 is slidably connected to the third screw rod 5 so that the liquid adding tube can move up and down; the third screw rod 5 is provided on the connecting frame 17, and the connecting frame 17 is connected to the sliding seat 13. The sliding seat 13 can lead the vertical moving sub-assembly to move up and down through the connecting frame 17.

[0018] The experimental test device is provided with a bottom plate 19 , and the clamping assembly, the horizontal moving assembly and the vertical moving assembly are all arranged on the bottom plate 19 .

[0019] Optionally, the clamping assembly includes two clamps 1, two support rods 21 and a sliding base 14 from top to bottom, the two clamps 1 are arranged side by side, the two support rods 21 are arranged side by side, the clamp 1 is horizontally arranged on the top of the support rod 21, and is used to clamp the container; the sliding base 14 is perpendicular to the support rod 21, and the two ends of the sliding base 14 are respectively connected to a support rod 21, and the support rod 21 stands vertically on the sliding base 14, and the two ends of the sliding base 14 are respectively provided with a through hole, so that the two first rail rods 6 can pass through the through holes respectively, and the sliding base 14 is slidably connected to the two first rail rods 6.

[0020] Further optionally, a connecting plate 22 is provided above the two clamps 1, the connecting plate 22 is parallel to the sliding base 14, and the connecting plate 22 connects the two clamps 1 by screws to stabilize the clamps. The arrangement direction of the two clamps is parallel to the sliding base 14, and the two clamps, two support rods and one sliding base 14 form a vertical square.

[0021] Preferably, waste liquid boxes are respectively provided at both ends of the upper surface of the connecting plate 1 22, and the remaining liquid after the liquid filling tube is filled is discharged into the waste liquid box.

[0022] Further optionally, the two vertical side surfaces of the sliding base 14 are perpendicular to the first track rod 6, and the two ends of the through hole of the sliding base 14 pass through the two vertical side surfaces of the sliding base 14 respectively; A threaded hole is provided in the middle of the sliding base 14 , which is parallel to the through hole of the sliding base 14 . The first screw rod 3 passes through the threaded hole. An internal thread is provided on the inner wall of the threaded hole, which matches the external thread on the outer side of the first screw rod 3 .

[0023] Further optionally, a connecting plate 23 is provided below the two clamps, and the connecting plate 23 is parallel to the connecting plate 1 22, and the two ends of the connecting plate 23 are respectively connected to the two support rods 21; two sensors 24 are provided on the connecting plate 23, and a sensor 24 is correspondingly provided below each clamp 1, and the sensing head of the sensor 1 faces the front of the clamp, and is used to sense whether there is a container in front of the clamp.

[0024] Further optionally, the clamp is a conventional clamp, including a clamping jaw and a controller, wherein the controller is detachably mounted on the top of the support rod, the clamping jaw is horizontally arranged, the tail of the clamping jaw is connected to the controller, the head of the clamping jaw points to the front of the clamp, and the controller controls the horizontal opening and closing of the clamping jaw to release or clamp the container.

[0025] Optionally, the horizontal movement assembly includes a first motor 9, a first screw rod 3, two first track rods 6 and two support plates 27, the first motor 9 and the two support plates 27 are arranged on the base plate 19 in sequence along the length direction of the first track rod 6; the first screw rod 3 and the two first track rods 6 are parallel to each other and are all horizontally arranged, the first screw rod 3 is between the two first track rods, the first track rod passes through the through hole of the sliding base 14, and the first screw rod 3 passes through the threaded hole of the sliding base 14.

[0026] Further optionally, the two support plates 27 are parallel to each other, support plate 1 is perpendicular to the first track rod, both ends of the first track rod are respectively connected to the two support plates 1, both ends of support plate 1 are respectively connected to the two first track rods, and the two support plates 1 and the two first track rods form a horizontal square.

[0027] Further optionally, one end of the first screw rod 3 is connected to the rotating shaft of the first motor 9, which is arranged horizontally, and the other end of the first screw rod 3 is rotatably connected to the support block 28, and the support block 28 is arranged between the two support plates. Preferably, the support block 28 is closer to the support plate away from the first motor 9, so that the length of the first screw rod 3 is greater than 1 / 2 of the first track rod.

[0028] Further optionally, the horizontal moving assembly further comprises a hinge and a chain slot 30, the chain slot 30 is parallel to the first track rod and is arranged on the outside of the horizontal moving assembly, the hinge is laid in the chain slot 30 and laid along the length direction of the chain slot 30, the end of the hinge is fixed in the chain slot 30, and the head end is connected to the outer side surface of a support rod; The gas pipeline of controller 1, the lines of controller 1 and sensor 1 24 are all arranged in the hinge and laid along the hinge. The pipelines and lines are inserted from the end of the hinge, extended along the hinge, and then passed through the head of the hinge, and then extended upward along the corresponding support column to connect to controller 1 or sensor 1. The hinge can drive the pipelines and lines to move with the clamping assembly to avoid entanglement of the pipelines and lines.

[0029] The rotating shaft of the first motor 9 drives the first screw 3 to rotate, and the threaded hole of the sliding base 14 is rotatably connected to the first screw 3. The first screw 3 can drive the sliding base 14 to move back and forth along the first track rod, so that the clamper drives the container to move toward the clamping cover device and the liquid adding tube. The container can be a volumetric bottle 2, and the clamping claw of the clamper clamps the slender neck of the volumetric bottle 2.

[0030] Optionally, the vertical moving assembly includes a support frame, a base, a second motor 10 and two clamping cover devices 16, the bottom of the base is arranged on the bottom, and the top of the base is connected to the support frame; the support frame is a square frame, including two upper and lower horizontal support plates 2 31 and two vertical second track rods 7, the sliding seat 13 is horizontally arranged, and the two ends of the sliding seat 13 are respectively slidably connected to the two second track rods 7, the second motor 10 is arranged on the upper support plate 2, the top end of the second screw rod 4 is connected to the second motor 10, the second screw rod 4 passes through the upper support plate 2 and the sliding seat 13, and the second motor 10 drives the sliding seat 13 to move up and down through the second screw rod 4; the side of the sliding seat 13 facing the clamping assembly is connected to two clamping cover devices.

[0031] The base can be in various forms. For example, the base is two pillars 20 , which are respectively set up on both sides of the horizontal moving component. The distance between the two pillars 20 is greater than the distance between the two first track rods 6 , and the base is set close to the first motor 9 .

[0032] Further optionally, the two ends of the support plate 2 below the support frame are respectively connected to the top of a pillar 20, the bottom end of the second track rod 7 is connected to one end of the support plate 2 below, and the top end of the second track rod 7 is connected to one end of the support plate 2 above; the bottom end of the second screw rod 4 is rotatably connected to the support plate 2 below.

[0033] Further optionally, through holes are respectively provided at both ends of the sliding seat 13, the direction of the through holes is vertical, and the two ends of the through holes respectively pass through the top surface and the bottom surface of the sliding seat 13, and the second track rod 7 passes through one end of the sliding seat 13 through the through hole; a threaded hole is provided in the middle of the sliding seat 13, and the second screw rod 4 passes through the threaded hole, and the external thread of the second screw rod 4 is adapted to the internal thread of the inner wall of the threaded hole, so that the second screw rod 4 can drive the sliding seat 13 to move.

[0034] Further optionally, the sliding seat 13 is in a cubic shape, the length direction of the sliding seat 13 is parallel to the support plate 2 31, and the height direction is parallel to the second track rod 7; the side of the sliding seat 13 facing the clamping assembly is the front side, and two clamping cover devices 16 are installed on the front side of the sliding seat 13, and the distance between the clamps 32 of the two clamping cover devices is equal to the distance between the clamping jaws 1 of the two clamps, so that the clamping cover device and the clamping jaw 1 of the clamp can correspond one to one.

[0035] Further optionally, the cover clamping device 16 includes a third motor 11 and a clamp 32, the shaft of the third motor 11 is vertically downward, the clamp 32 is connected to the bottom end of the shaft of the third motor 11, and the third motor 11 can drive the clamp 32 to rotate; The clamp 32 has a built-in electromagnetic controller, which is connected to the two clamping jaws 2 of the clamp 32 to control the two clamping jaws 2 to move closer to or farther away from each other so as to clamp or release the bottle cap on the top of the container.

[0036] Further optionally, the chuck 32 is block-shaped, and a hollow track is provided on the bottom surface of the chuck 32. The tops of the two clamping jaws 2 pass through the hollow track and are then connected to an electromagnetic controller. The lower and middle parts of the two clamping jaws 2 are below the chuck 32 and outside the chuck 32; the electromagnetic controller controls the two clamping jaws 2 to move closer to or away from each other along the hollow track.

[0037] The clamping assembly clamps two volumetric bottles 2 and moves along the first track rod 6 toward the first motor 9. When the clamping assembly moves to the bottom of the cap clamping device, the clamping head 32 of the cap clamping device corresponds to the bottle mouth of the volumetric bottle one by one up and down, and the rotating shaft of the second motor 10 drives the second screw rod 4 to rotate to drive the sliding seat 13 to move downward along the second track rod 7, and the sliding seat 13 leads the cap clamping device to move downward; at the same time, the electromagnetic controller controls the two clamping jaws 2 to move away from each other, and the bottle cap of the bottle mouth of the volumetric bottle can be between the two clamping jaws 2, and the electromagnetic controller controls the two clamping jaws 2 to move closer to each other, and the two clamping jaws 2 clamp the bottle cap; the third motor 11 drives the clamping head 32 to rotate and unscrew the bottle cap, and at the same time, the second motor 10 controls the sliding seat 13 to rise, so that the bottle cap can rotate and rise, and finally detach from the volumetric bottle.

[0038] After the liquid addition is completed, according to the above method, the bottle cap clamped by the cap clamping device in the above steps is rotated and lowered again, and screwed back to the mouth of the volumetric flask.

[0039] Optionally, the vertical movement sub-assembly also includes a fourth motor 12, two liquid adding tubes 18 and two vertical third track rods 8. The connecting frame 17 is a C-shaped frame. The middle part of the connecting frame 17 is connected to the front of the sliding seat 13. The fourth motor 12 is arranged above the connecting frame 17. The third track rod 8 connects the top and bottom of the opening of the connecting frame 17. A vertical third screw rod 5 is provided between the two third track rods 8. The third screw rod 5 passes through the top of the connecting frame 17 and is then connected to the rotating shaft of the fourth motor 12; the liquid adding frame 15 is horizontally arranged, the third screw rod 5 and the two third track rods 8 pass through the liquid adding frame 15, and the liquid adding tubes 18 are detachably installed at both ends of the liquid adding frame 15; the bottom end of the liquid adding tube 18 is open, and the top end is connected to an external liquid storage container through a pipeline.

[0040] Further optionally, the connecting frame 17 includes two horizontal transverse plates 34 and a vertical vertical plate 35, the upper and lower ends of the vertical plate 35 are respectively fixedly connected to the ends of the upper and lower transverse plates 34, the head ends of the two transverse plates 34 point to the clamping assembly, and the upper and lower ends of the third track rod 8 are respectively connected to the head ends of the upper and lower transverse plates 34; the two third track rods 8 are arranged in a row, and the connection line between the two third track rods 8 is parallel to the width direction of the vertical plate 35. From the side, the third track rod, the two transverse plates 34 and the vertical plate 35 form a square.

[0041] Further optionally, the two third track rods and the third screw rod 5 are arranged in a straight line, and the liquid adding rack 15 is parallel to the straight line; the liquid adding rack 15 is an inverted "concave" shape, the third screw rod 5 and the two third track rods pass through the middle of the liquid adding rack 15, and the liquid adding tube 18 vertically passes through one end of the liquid adding rack 15. Preferably, the third screw rod 5, the two third track rods and the two liquid adding tubes are on the same vertical plane.

[0042] Further optionally, a threaded hole is provided in the middle of the liquid adding rack 15, and the third screw rod 5 passes through the threaded hole. The external thread of the third screw rod 5 is matched with the internal thread of the inner wall of the threaded hole, so that the third screw rod 5 can drive the liquid adding rack 15 to move.

[0043] Further optionally, a limit sub-component 36 is provided on the vertical side of the liquid adding rack 15 facing the clamping assembly, and the limit sub-component 36 includes a vertical baffle 38, and the upper middle part of the baffle 38 extends upward from the liquid adding rack 15; A limit female component 37 is provided on the vertical side surface of the head end of the upper horizontal plate facing the clamping assembly. The limit female component 37 has a groove, and a second sensor is provided in the groove for sensing the blocking piece 38 moved into the groove.

[0044] After the capping device unscrews the caps of the two volumetric bottles, the second motor 10 controls the sliding seat 13 to move up. At this time, the liquid adding rack 15 is close to the top of the third track rod. After the sliding seat 13 moves up to the bottom of the two liquid adding tubes above the mouth of the volumetric bottle, the liquid adding tube does not affect the movement of the volumetric bottle. The first motor 9 controls the clamping assembly to move a short distance away from the support, so that the mouth of the volumetric bottle is directly below the corresponding liquid adding tube. Then, the second motor 10 controls the sliding seat 13 to descend, and at the same time, the fourth motor 12 controls the third screw rod 5 to rotate, thereby driving the liquid adding rack 15 to descend along the third track rod, thereby driving the liquid adding tube to descend. The length of the second track rod is greater than that of the third track rod, and both are vertical. The second track rod provides a relatively large lifting space for the liquid adding tube, and the second track rod also provides a lifting space for the clamping cover device, and the third track rod provides a relatively small lifting space for the liquid adding tube, that is, the large lifting of the liquid adding tube depends on the second motor 10 and the second screw rod 4, and the small adjustment depends on the fourth motor 12 and the third screw rod 5, which can realize the precise control of the position of the liquid adding tube. The external thread of the third screw rod 5 can be set more densely, so that the movement range of the liquid adding rack 15 is smaller and more precise.

[0045] The bottom of the liquid adding tube descends and is inserted below the constant volume line of the volumetric flask, and the liquid pump can be started to add the liquid in the liquid storage container into the volumetric flask through the liquid adding tube. The liquid level in the volumetric flask continues to rise, and the liquid adding tube also rises accordingly. This small and continuous lifting is controlled by the fourth motor 12 and the third screw rod 5, and the control is more accurate. Especially when the liquid level gradually approaches the constant volume line, the liquid pump is turned off, and the pipeline connected to the dripping device is switched. The pipeline connected to the dripping device is also connected to the liquid storage container and the liquid adding tube, so that the liquid adding tube releases liquid drop by drop, and then cooperates with the small increase of the liquid adding tube to make the liquid addition more accurate. When the center of the liquid level reaches the constant volume line at the bottom, stop dripping the liquid. The liquid adding tube rises and leaves the volumetric flask, and the clamping cover device covers the two volumetric flasks with bottle caps.

[0046] The groove of the limit mother component 37 faces the direction of the clamping assembly, and the sensing surface of the second sensor also faces the direction of the clamping assembly. When the liquid adding rack 15 leads the limit subcomponent 36 to rise and fall below the limit mother component 37, the baffle 38 does not block the sensing surface of the second sensor, and the fourth motor 12 works normally. When the limit subcomponent 36 moves up with the liquid adding rack 15 to the middle and upper part of the baffle 38 to block the sensing surface of the second sensor, the second sensor senses the baffle 38 and forces the fourth motor 12 to stop working. At this time, the top of the liquid adding rack 15 is at a small distance from the upper horizontal plate. The use of the limit mother component 37 and the limit subcomponent 36 prevents the liquid adding rack 15 from rising too much and colliding with the upper horizontal plate.

[0047] The bottom end of the third screw rod 5 can be rotated to connect to the head end of the lower horizontal plate, or it can be suspended in the air without contacting the lower horizontal plate. The first track rod, the second track rod and the third track rod are all straight cylindrical rods with smooth surfaces. Controller 1 is a conventional finger cylinder, and controller 2 and controller 3 are both conventional controllers. Sensor 1, sensor 2 and sensor 3 are all conventional sensors, such as infrared sensors, which can emit rays to sense objects in front. Sensor 1 is connected to the clamp, and when sensor 1 senses that there is a container in front, the clamp is controlled to clamp the container. Sensor 2 is connected to the fourth motor 12, and when sensor 2 senses that there is a baffle 38 in front, the fourth motor 12 is controlled to stop working.

[0048] The present invention adopts a device that cooperates with three sets of screw rods, track rods and sliding devices (sliding base 14, sliding seat 13, liquid adding rack 15) to move. When the sliding device moves along the corresponding track rod, the sliding device may be skewed. Since the track rod passes through the through hole of the sliding device, if the track rod is parallel to the through hole, the sliding device can move smoothly; if the sliding device is skewed, the through hole and the track rod are not parallel, the sliding device is stuck by the track rod, and the screw rod cannot push the sliding device, which is also a damage to the screw rod. In response to this problem, the present invention provides the following solution.

[0049] Optionally, the inner walls of the through holes of the sliding base 14, the sliding seat 13 and the liquid adding rack 15 are provided with two circles of recessed grooves 39, which protrude toward the outside of the through holes, and the two circles of grooves 39 are respectively close to the two ends of the through holes; a plurality of balls 40 are embedded in the grooves 39, and the balls are spherical, and adjacent balls contact each other, with a part of the balls being in the grooves and the other part extending out of the grooves and being able to contact the corresponding first track rod or the second track rod or the third track rod.

[0050] The contact between the through hole and the track rod of the existing sliding device is surface contact. The present invention provides a circle of grooves at both ends of the through hole, and arranges balls in the grooves. The balls are in direct contact with the track rod to form point contact, which reduces resistance and makes sliding smoother.

[0051] Further optionally, the end of the sliding base 14 corresponds to a first track rod, and both ends of the sliding base 14 are called first ends 41. A first through hole 42 is provided at the center of the first end 41, and the first track rod passes through the first through hole 42; the end of the first end 41 away from the first motor 9 is the front end, and the end close to the first motor 9 is the rear end; A first deviation corrector 43 is provided on the side of the front end of the first end 41, and a horizontal first tunnel 44 is provided inside the front end of the first end 41, and the first tunnel 44 is perpendicular to the first track rod; one end of the first tunnel 44 is connected to the corresponding groove 39, and the other end passes through the outer side of the sliding base 14 and is connected to the external environment, and the telescopic rod 45 of the first deviation corrector 43 passes through the first tunnel 44; A second deviation corrector 49 is provided on the side surface of the rear end of the first end 41, and a horizontal second tunnel is provided inside the rear end of the first end 41, and the second tunnel is perpendicular to the first track rod; one end of the second tunnel is connected to the corresponding groove, and the other end passes through the outer side surface of the sliding base 14 and is connected to the external environment, and the telescopic rod of the second deviation corrector runs through the second tunnel; the first deviation corrector 43 and the second deviation corrector are on the same side of the first end 41.

[0052] The first deflection corrector 43 and the second deflection corrector may be both located on the outside of the first end portion 41 (ie, the side away from the first screw rod 3 ), or may be both located on the inside of the first end portion 41 (ie, the side facing the first screw rod 3 ).

[0053] The groove has three side surfaces, two opposite side surfaces are parallel to each other and perpendicular to the first track bar, and the other side surface is the bottom surface 46 of the groove, the bottom surface 46 is parallel to the first track bar and faces the first track bar, the bottom surface 46 is circular and is arranged concentrically with the first track bar. The four directions of the ball 40, up, down, left, and right, respectively face the bottom surface 46 of the groove, the outer side surface of the first track bar, and the two side surfaces of the groove, that is, the bottom surface, three side surfaces of the groove and the first track bar support and limit the position of the ball.

[0054] Further optionally, the first deviation corrector 43 includes a second controller 47, a support 48 and a telescopic rod 45, the support spans a hole formed on the outer side of the first end 41 by the first tunnel 44, and the two ends of the support are respectively connected to the outer side surfaces of the first end 41 on both sides of the hole, the second controller 47 is arranged on a side of the support away from the outer side surface of the first end 41, and the second controller 47 is facing the hole, the end of the telescopic rod 45 is connected to the second controller, the telescopic rod 45 passes through the support and extends along the first tunnel 44 to the corresponding groove 39, and the head end surface of the telescopic rod 45 is flush with the bottom surface 46 of the groove in the initial state; A pressure sensing device is provided in the controller 2 47 for sensing the pressure exerted on the head end of the telescopic rod 45. When the pressure is greater than a preset value, it indicates that the ball corresponding to the head end of the telescopic rod in the groove presses the telescopic rod outward, further indicating that the first track rod presses the ball. Since the position of the first track rod is fixed, it also indicates that the first end 41 is tilted (that is, the sliding base 14 is tilted). The pressure sensing device controls the extension of the telescopic rod through the controller 2, pushes the ball pressing the telescopic rod back into the groove, and indirectly applies force to the first track rod, so that the through hole of the sliding base 14 is restored to a parallel state with the first track rod.

[0055] Further optionally, the second deviation corrector has the same structure and function as the first deviation corrector 43, that is, the second deviation corrector includes a second controller, a support and a telescopic rod, the support spans a hole formed on the outer side of the first end 41 by the second tunnel, and the two ends of the support are respectively connected to the outer side of the first end 41 on both sides of the hole, the second controller is arranged on a side of the support away from the outer side of the first end 41, and the second controller is facing the hole, the end of the telescopic rod is connected to the second controller, the telescopic rod passes through the support and extends along the second tunnel to the corresponding groove, and the head end face of the telescopic rod is flush with the bottom surface of the groove; A pressure sensing device is provided in the second controller for sensing the pressure exerted on the head end of the telescopic rod. When the pressure is greater than a preset value, it indicates that the ball corresponding to the head end of the telescopic rod in the groove presses the telescopic rod outward, further indicating that the first track rod presses the ball. Since the position of the first track rod is fixed, it also indicates that the first end 41 is tilted (that is, the sliding base 14 is tilted). The pressure sensing device controls the extension of the telescopic rod through the second controller to push the ball pressing the telescopic rod back into the groove, thereby indirectly applying force to the first track rod, so that the through hole of the sliding base 14 is restored to a parallel state with the first track rod.

[0056] As a specific embodiment, the front end and the rear end of any first end 41 of the sliding base 14 are respectively provided with a first deviation corrector 43 and a second deviation corrector on the outside, and the first tunnel 44 and the second tunnel are on the same horizontal plane and are both in the middle of the height direction of the first end 41. When the sliding base 14 moves along the first track rod, if the sliding base 14 tilts in the horizontal direction, for example, the front end of the first end 41 tilts in the direction away from the first track rod, and the rear end of the first end 41 tilts in the direction close to the first track rod, the sliding base 14 is stuck and stops moving, and the first motor 9 also stops working. The ball corresponding to the second tunnel in the groove at the rear end of the first end 41 is under pressure, and a part of the ball is pressed into the second tunnel and squeezes the beginning of the corresponding telescopic rod. The telescopic rod is under pressure, and the pressure sensing device of the second deviation corrector senses that the pressure is greater than the preset pressure. The second controller of the second deviation corrector pushes the telescopic rod to push the ball back into the groove. At the same time, the ball acts on the first track rod to push the rear end of the first end 41 away from the first track rod. When the first through hole 42 of the first end portion 41 is restored to be parallel to the first track rod, the second deviation corrector withdraws the telescopic rod, the front end face of the telescopic rod returns to its initial state, the ball in the rear end groove of the first end portion 41 does not press the telescopic rod, and after the second deviation corrector detects that the pressure value is qualified, it restarts the first motor 9 to restore the movement of the sliding base 14.

[0057] For another example, the front end of the first end 41 tilts toward the direction close to the first track rod, the sliding base 14 is stuck and stops moving, the ball corresponding to the first tunnel 44 in the groove at the front end of the first end 41 is under pressure, a part of the ball is pressed into the first tunnel 44, and squeezes the corresponding beginning of the telescopic rod, the telescopic rod is under pressure, the pressure sensing device of the first deviation corrector 43 senses that the pressure is greater than the preset pressure, the controller 2 of the first deviation corrector 43 pushes the telescopic rod to push the ball back into the groove, and at the same time the ball acts on the first track rod to push the front end of the first end 41 away from the first track rod. When the first through hole 42 of the first end 41 is restored to be parallel to the first track rod, the first deviation corrector 43 withdraws the telescopic rod, the end face of the head end of the telescopic rod returns to the initial state, the ball in the groove at the front end of the first end 41 does not press the telescopic rod, and after the first deviation corrector 43 detects that the pressure value is qualified, it restarts the first motor 9 to restore the movement of the sliding base 14.

[0058] Further optionally, the end of the sliding seat 13 corresponds to a second track rod, both ends of the sliding seat 13 are called second ends, a second through hole is provided at the center of the second end, and the second track rod passes through the second through hole; A third deviation corrector is provided on the side of the lower end of the second end portion, and a horizontal third tunnel is provided inside the lower end of the second end portion, one end of the third tunnel is connected to the corresponding groove, and the other end passes through the outer side of the sliding seat 13 and is connected to the external environment, and the telescopic rod of the third deviation corrector passes through the third tunnel; A fourth deflection corrector is provided on the side of the upper end of the second end, and a fourth horizontal tunnel is provided inside the upper end of the second end. One end of the fourth tunnel is connected to the corresponding groove, and the other end passes through the outer side of the sliding seat 13 and is connected to the external environment. The telescopic rod of the fourth deflection corrector passes through the fourth tunnel; the third deflection corrector and the fourth deflection corrector are on the same side of the second end. The structure and function of the third deflection corrector and the fourth deflection corrector are the same as those of the first deflection corrector 43.

[0059] As a specific embodiment, the third and fourth deviation correctors are respectively provided on the outer sides of the lower and upper ends of any second end of the sliding seat 13, and the third tunnel and the fourth tunnel are on the same vertical plane and are both in the middle of the second end in the thickness direction. When the sliding seat 13 moves along the second track rod, if the sliding seat 13 tilts in the vertical direction, for example, the lower end of the second end tilts in the direction away from the second track rod, and the upper end of the second end tilts in the direction close to the second track rod, the sliding seat 13 is stuck and stops moving, and the second motor 10 also stops working. The ball corresponding to the fourth tunnel in the groove at the upper end of the second end is under pressure, and a part of the ball is pressed into the fourth tunnel and squeezes the corresponding beginning of the telescopic rod. The telescopic rod is under pressure, and the pressure sensing device of the fourth deviation corrector senses that the pressure is greater than the preset pressure. The fourth deviation corrector pushes the telescopic rod to push the ball back into the groove, and at the same time, the ball acts on the second track rod to push the upper end of the second end away from the second track rod. When the second through hole at the second end is restored to be parallel to the second track rod, the fourth deviation corrector withdraws the telescopic rod, the front end face of the telescopic rod returns to its initial state, the ball in the upper end groove of the second end does not press the telescopic rod, and after the fourth deviation corrector detects that the pressure value is qualified, it restarts the second motor 10 to restore the movement of the sliding seat 13.

[0060] For another example, the lower end of the second end portion tilts toward the direction close to the second track rod, the sliding seat 13 is stuck and stops moving, the ball corresponding to the third tunnel in the groove at the lower end of the second end portion is under pressure, a part of the ball is pressed into the third tunnel, and squeezes the corresponding beginning of the telescopic rod, the telescopic rod is under pressure, the pressure sensing device of the third deviation corrector senses that the pressure is greater than the preset pressure, the third deviation corrector pushes the telescopic rod to push the ball back into the groove, and at the same time the ball acts on the second track rod to push the lower end of the second end portion away from the second track rod. When the second through hole of the second end portion is restored to be parallel to the second track rod, the third deviation corrector withdraws the telescopic rod, the end face of the head end of the telescopic rod returns to the initial state, the ball in the groove at the lower end of the second end portion does not press the telescopic rod, and after the third deviation corrector detects that the pressure value is qualified, it restarts the second motor 10 to restore the movement of the sliding seat 13.

[0061] The liquid adding rack 15 of the present invention is not provided with a deviation corrector similar to the above, because the two ends of the sliding base 14 are connected to the first track rod, and the middle part is connected to the first screw rod 3, and the screw rod is far away from the track rod. The screw rod controls the movement of the middle part of the sliding base 14, but the two ends of the sliding base 14 are prone to tilting, and the same is true for the sliding seat 13. However, the middle part of the liquid adding rack 15 is connected through the third screw rod 5 and the two third track rods, and the distance between the third screw rod 5 and the third track rod is small. In addition, the liquid adding pipes at both ends of the liquid adding rack play a balancing and counterweighting role, so the liquid adding rack 15 is not easy to tilt.

[0062] However, in combination with the above content, the moving accuracy of the liquid adding rack 15 is required to be relatively high. In addition to the fine external thread of the third screw rod 5, the present invention also provides the following solutions.

[0063] Optionally, a sensor 3 is hung on the side of the liquid adding rack 15 away from the clamping assembly, the sensor 3 is located below the liquid adding rack 15, and the sensing surface of the sensor 3 faces the clamping assembly; A telescopic support device is provided on the lower horizontal plate 34 of the connecting frame 17, and the telescopic support device includes a support base 29, a telescopic sleeve 26 and a plurality of vertical secondary telescopic rods 25. The telescopic sleeve 26 is sleeved outside the third screw rod 5, and a support ring 33 is provided on the top of the telescopic sleeve 26 for supporting the liquid adding frame 15; the top of the secondary telescopic rod 25 is connected to the support ring 33, and the bottom of the secondary telescopic rod 25 is connected to the support base 29. The support base 29 controls the secondary telescopic rod 25 to extend and retract up and down, so as to drive the top of the telescopic sleeve 26 to rise and fall, and adjust the height of the telescopic sleeve 26. A plurality of secondary telescopic rods 25 are evenly arranged along the circumference of the support ring 33.

[0064] Further optionally, the bottom end of the third screw rod 5 is suspended in the air and does not contact the horizontal plate below, leaving space for the telescopic support device; the support base 29 is arranged below the third screw rod 5 and between the two third track rods, and the telescopic sleeve 26 is made of a flexible material and can be folded for easy telescopic operation; the support ring 33 and the auxiliary telescopic rod 25 are made of a rigid material to facilitate supporting the liquid adding rack 15.

[0065] If the telescopic support device is not provided, the liquid adding frame 15 is supported only by the third screw rod 5. When the liquid adding frame 15 is suspended at a certain position of the third screw rod 5 and the liquid adding tube is adding liquid into the volumetric flask, the fixing of the liquid adding frame 15 is only by the threaded connection. In the long run, the thread of the third screw rod 5 is worn. As mentioned above, the external thread of the third screw rod 5 can be specially made, so the third screw rod 5 should be protected. The telescopic support device can provide an extra support for the suspended liquid adding frame 15, and the telescopic sleeve 26 covers the outside of the third screw rod 5 to protect the third screw rod 5 through physical isolation.

[0066] A controller three is provided in the support base 29, and the fourth motor 12 and the sensor three are all communicatively connected to the controller three. When the fourth motor 12 controls the liquid adding rack 15 to stop moving for a certain period of time, that is, when a longer stay is required, the sensor three is started, and the controller three controls the secondary telescopic rod 25 to extend and rise from the shortest state. When the sensor three senses the passing of the support ring 33, the controller three controls the secondary telescopic rod 25 to move upward for a short distance and then stop rising. The short distance is the distance between the sensing head of the sensor three and the lower surface of the liquid adding rack 15, so that the support ring 33 contacts and supports the lower surface of the liquid adding rack 15.

[0067] When the liquid adding rack 15 needs to be moved again, it first moves upward a short distance, the sensor 3 senses the support ring 33, and the controller 3 controls the secondary telescopic rod 25 to descend and shorten to the shortest state without affecting the movement of the liquid adding rack 15.

[0068] An electric control box is provided on one side of the vertical moving assembly away from the clamping assembly to serve the automatic liquid adding experimental testing device.

Claims

1. An automatic liquid adding experimental test device, characterized in that: The invention comprises a clamping assembly, a horizontal moving assembly, a vertical moving assembly and a vertical moving subassembly, wherein the clamping assembly has at least one clamper for clamping the container, and the bottom of the clamping assembly is slidably connected to a first screw rod and a first track rod of the horizontal moving assembly, so that the clamper can move along the first track rod; A vertical moving assembly and a vertical moving sub-assembly are provided above the horizontal moving assembly. The vertical moving assembly includes a second screw rod, a sliding seat and at least one cover clamping device. The cover clamping device is provided on the sliding seat. The sliding seat is slidably connected to the second screw rod to drive the cover clamping device to move up and down to cover or remove the cover of the container; the vertical moving sub-assembly includes a third screw rod, a connecting frame and a liquid adding frame. At least one liquid adding tube is installed on the liquid adding frame for adding liquid into the container. The liquid adding frame is slidably connected to the third screw rod so that the liquid adding tube can move up and down; the third screw rod is provided on the connecting frame, and the connecting frame is connected to the sliding seat. The sliding seat can lead the vertical moving sub-assembly to move up and down through the connecting frame.

2. The automatic liquid adding experimental test device according to claim 1, characterized in that: The clamping assembly includes two clamps, two support rods and a sliding base from top to bottom. The two clamps are arranged side by side, the two support rods are arranged side by side, and the clamps are horizontally arranged on the top of the support rods for clamping the container; the two ends of the sliding base are respectively connected to a support rod, the support rods are vertically arranged, and the two ends of the sliding base are respectively provided with a through hole, so that the two first track rods can pass through the through holes respectively, and the sliding base is slidably connected to the two first track rods.

3. The automatic liquid adding experimental test device according to claim 2, characterized in that: A horizontal connecting plate 2 is provided below the two clamps, and two ends of the connecting plate 2 are respectively connected to two supporting rods; two sensors 1 are provided on the connecting plate 2, and the sensors 1 correspond to the clamps one by one, and the sensing head of the sensor 1 faces the front of the clamp, and is used to sense whether there is a container in front of the clamp.

4. The automatic liquid adding experimental test device according to claim 1, characterized in that: The horizontal movement assembly includes a first motor, a first screw rod, two first track rods and two support plates. The first motor and the two support plates are arranged on the bottom plate in sequence along the length direction of the first track rod; the first screw rod and the two first track rods are parallel to each other and are all arranged horizontally, the first screw rod is located between the two first track rods, the first track rod passes through the through hole of the sliding base, and the first screw rod passes through the threaded hole of the sliding base.

5. The automatic liquid adding experimental test device according to claim 1, characterized in that: The vertical moving assembly includes a support frame, a base, a second motor and two clamping cover devices. The bottom of the base is arranged on the bottom, and the top of the base is connected to the support frame; the support frame is a square frame, including two upper and lower horizontal support plates and two vertical second track rods, the sliding seat is horizontally arranged, and the two ends of the sliding seat are respectively slidably connected to the two second track rods, the second motor is arranged on the upper support plate, the top end of the second screw rod is connected to the second motor, the second screw rod passes through the upper support plate and the sliding seat, and the second motor drives the sliding seat to move up and down through the second screw rod; the side of the sliding seat facing the clamping assembly is connected to the two clamping cover devices.

6. The automatic liquid adding experimental test device according to claim 5, characterized in that: The clamping cover device comprises a third motor and a clamping head, the rotating shaft of the third motor is vertically downward, the clamping head is connected to the bottom end of the rotating shaft of the third motor, and the third motor can drive the clamping head to rotate; The chuck has a built-in electromagnetic controller, which is connected to the two second clamping jaws of the chuck to control the two second clamping jaws to move closer to or farther away from each other so as to clamp or release the bottle cap on the top of the container.

7. The automatic liquid adding experimental test device according to claim 1, characterized in that: The vertical movement subassembly also includes a fourth motor, two liquid adding pipes and two vertical third track rods. The connecting frame is a C-shaped frame. The middle of the connecting frame is connected to the front of the sliding seat. The fourth motor is arranged above the connecting frame. The third track rods connect the top and bottom of the opening of the connecting frame. A vertical third screw rod is arranged between the two third track rods. The third screw rod passes through the top of the connecting frame and is then connected to the rotating shaft of the fourth motor. The liquid adding frame is arranged horizontally, the third screw rod and two third rail rods pass through the liquid adding frame, and liquid adding pipes are detachably installed at both ends of the liquid adding frame; the bottom end of the liquid adding pipe is open, and the top end is connected to the external liquid storage container through a pipeline.

8. The automatic liquid adding experimental test device according to claim 7, characterized in that: The connecting frame includes two horizontal transverse plates and a vertical vertical plate, the upper and lower ends of the vertical plate are respectively fixedly connected to the ends of the upper and lower transverse plates, the head ends of the two transverse plates point to the clamping assembly, and the upper and lower ends of the third track rod are respectively connected to the head ends of the upper and lower transverse plates; A limit sub-component is provided on the vertical side surface of the liquid adding rack facing the clamping assembly, and the limit sub-component includes a vertical baffle, and the upper middle portion of the baffle extends upward from the liquid adding rack; A limit female part is arranged on the vertical side surface of the head end of the upper horizontal plate facing the clamping assembly. The limit female part has a groove. A second sensor is arranged in the groove for sensing the blocking piece moved into the groove.

9. The automatic liquid adding experimental test device according to claim 2, characterized in that: The inner walls of the through holes of the sliding base, the sliding seat and the liquid adding rack are all provided with two circles of concave grooves, which protrude toward the outside of the through hole, and the two circles of grooves are respectively close to the two ends of the through hole; a plurality of balls are embedded in the grooves, and the balls are spherical. Adjacent balls contact each other, and a part of the balls is in the groove, and the other part extends out of the groove and can contact the corresponding first track rod, the second track rod or the third track rod.

10. The automatic liquid adding experimental test device according to claim 1, characterized in that: A sensor 3 is hung on the side of the liquid adding rack away from the clamping assembly, the sensor 3 is located below the liquid adding rack, and the sensing surface of the sensor 3 faces the clamping assembly; A telescopic support device is provided on the lower horizontal plate of the connecting frame, and the telescopic support device includes a support base, a telescopic sleeve and a plurality of vertical auxiliary telescopic rods. The telescopic sleeve is sleeved on the outside of the third screw rod, and a support ring is provided on the top of the telescopic sleeve for supporting the liquid adding rack; The top of the secondary telescopic rod is connected to the support ring, and the bottom of the secondary telescopic rod is connected to the support base. The support base controls the secondary telescopic rod to extend and retract up and down to drive the top of the telescopic sleeve to rise and fall and adjust the height of the telescopic sleeve.

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