An automatic liquid adding experimental test device

Abstract

The present invention belongs to the technical field of automatic liquid addition in laboratories, and specifically relates to an experimental testing device for automatic liquid addition, comprising a clamping assembly, a horizontal moving assembly, a vertical moving assembly, and a vertical moving subassembly. The clamping assembly has a clamp for clamping a container, and the bottom is connected to the first screw and the first track rod of the horizontal moving assembly; the vertical moving assembly includes a second screw and a sliding seat, the sliding seat is provided with a clamping cover device, and the sliding seat is connected to the second screw for covering or removing the container; the vertical moving subassembly includes a third screw, a connecting frame, and a liquid adding frame. The liquid adding frame is provided with a liquid adding tube for adding liquid to the container, and the liquid adding frame is connected to the third screw so that the liquid adding tube can move up and down; the third screw is provided on the connecting frame, and the connecting frame is connected to the sliding seat, and the sliding seat leads the vertical moving subassembly to move up and down through the connecting frame. The present invention solves the problems of cumbersome manual pipetting and liquid adding operations and large human errors in existing solution configurations.

Description

Technical Field

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

[0002] Laboratory automation systems are widely used in clinical laboratories, biomedicine, environmental testing, food safety, chemical engineering, and other fields. In clinical laboratories, automation systems use automated testing equipment and computers to automate measurement, experimentation, and data processing. These systems include scientific experiments, simulations, image processing, automated measurement, automated inspection, and control of laboratory equipment. Automation systems are also used in scientific research institutions and medical institutions to improve the efficiency and quality of scientific research.

[0003] With the rapid development of downstream applications in life sciences, the laboratory field faces enormous challenges. Among them, solution preparation is a very important and fundamental experimental operation in testing and experiments, and it has a wide range of applications. Currently, due to the differences in solution preparation (different specifications, different liquids used, and different volumes used), manual operations are widely used to pipette liquids. However, manual pipetting and adding liquids are not only cumbersome but also involve many human errors, such as the accuracy of the pipetting volume, any liquid loss during pipetting, and the amount of residual liquid in the pipette. Therefore, this field urgently needs to develop a universal automated liquid addition device to improve the throughput, speed, accuracy, and repeatability of experiments. Summary of the Invention

[0004] To address the above problems, the present invention provides an automatic liquid-adding experimental testing device, comprising a clamping assembly, a horizontal moving assembly, a vertical moving assembly, and a vertical moving subassembly. The clamping assembly comprises at least one clamp for clamping a container. 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 clamp can move along the first track rod.

[0005] 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 lid 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.

[0006] 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 a through hole is respectively provided at both ends of the sliding base, so that the two first rail rods can pass through the through holes respectively, and the sliding base is slidably connected to the two first rail rods.

[0007] 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 one-to-one with the clamps, 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.

[0008] Optionally, the horizontal movement assembly includes a first motor, a first screw rod, two first track rods and two support plates, and 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.

[0009] 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 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.

[0010] 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;

[0011] 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.

[0012] 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 arranged horizontally, 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.

[0013] 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.

[0014] Further optionally, a limit sub-component is provided on the vertical side surface of the liquid adding rack facing the clamping assembly, the limit sub-component includes a vertical baffle, the upper middle portion of the baffle extends upward from the liquid adding rack;

[0015] A limit female component is provided on the vertical side surface of the head end of the upper horizontal plate facing the clamping assembly. The limit female component has a groove. A second sensor is provided in the groove for sensing the blocking piece moving into the groove.

[0016] Optionally, the inner walls of the through holes of the sliding base, sliding seat and liquid adding rack are 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 number of balls are embedded in the grooves, and the balls are spherical. Adjacent balls contact each other, and 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 second track rod or third track rod.

[0017] Optionally, a sensor 3 is mounted 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;

[0018] A telescopic support device is provided on the horizontal plate below the connecting frame, which includes a support base, a telescopic sleeve and several 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. The support base controls the up and down extension of the secondary telescopic rod 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

[0019] Figure 1 This is a schematic structural diagram of the automatic liquid-adding experimental test device;

[0020] Figure 2 is a side schematic diagram of the experimental test device;

[0021] Figure 3 is a schematic diagram of a vertically movable subassembly;

[0022] Figure 4 It is a schematic diagram of two deviation correctors on the sliding base;

[0023] Figure 5 is a schematic diagram of a first deviation corrector;

[0024] Figure 6 Schematic diagram of the telescopic support device.

[0025] In the accompanying drawings, 1-clamp, 2-volume flask, 3-first screw, 4-second screw, 5-third screw, 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-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-pair of telescopic rods, 26-telescopic sleeve, 27-support plate one, 28-support block, 29-support base, 30-chain slot, 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 piece, 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

[0026] This embodiment provides an automatic liquid adding experimental test device, such as Figures 1-6 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 clamper 1 for clamping a container. The bottom of the clamping assembly is slidably connected to the first screw rod 3 and the first track rod 6 of the horizontal moving assembly, so that the clamper 1 can move along the first track rod 6.

[0027] 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, driving the cover clamping device to move up and down to cover or remove 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.

[0028] The experimental testing device is provided with a base plate 19 , on which the clamping assembly, the horizontal moving assembly and the vertical moving assembly are all provided.

[0029] 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, and the clamp 1 is horizontally arranged on the top of the support rod 21 for clamping 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 a through hole is respectively provided at both ends of the sliding base 14, so that the two first track rods 6 can pass through the through holes respectively, and the sliding base 14 is slidably connected to the two first track rods 6.

[0030] Optionally, a connecting plate 22 is provided above the two clamps 1. The connecting plate 22 is parallel to the sliding base 14 and connects the two clamps 1 via screws to stabilize the clamps. The two clamps are arranged parallel to the sliding base 14, and the two clamps, the two support rods, and the sliding base 14 form a vertical square.

[0031] Preferably, waste liquid boxes are provided at both ends of the upper surface of the connecting plate 1 22, and the remaining liquid after the liquid is added by the liquid adding tube is discharged into the waste liquid box.

[0032] 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;

[0033] 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 .

[0034] 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 1 24 are provided on the connecting plate 23, and a sensor 1 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.

[0035] Further optionally, the clamp is a conventional clamp, including a clamping claw and a controller, the controller is detachably mounted on the top of the support rod, the clamp is horizontally arranged, the tail of the clamp is connected to the controller, the head of the clamp points to the front of the clamp, and the controller controls the horizontal opening and closing of the clamp to release or clamp the container.

[0036] 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, and 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 arranged horizontally, 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.

[0037] Further optionally, the two support plates 1 27 are parallel to each other, support plate 1 is perpendicular to the first track rod, the two ends of the first track rod are respectively connected to the two support plates 1, the two 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.

[0038] 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 1. Preferably, the support block 28 is closer to the support plate 1 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.

[0039] Further optionally, the horizontal moving assembly further includes a hinge and a chain slot 30, the chain slot 30 being parallel to the first track rod and being provided on the outside of the horizontal moving assembly, the hinge being laid in the chain slot 30 and laid along the length direction of the chain slot 30, the end of the hinge being fixed in the chain slot 30, and the head end being connected to the outer side surface of a support rod;

[0040] The air circuits for Controller 1, as well as the wiring for Controller 1 and Sensor 1 24, are located within and routed along the hinge. These pipes and wiring enter at the hinge's end, extend along the hinge, and exit at the hinge's head. They then extend upward along the corresponding support column to connect to Controller 1 or Sensor 1. The hinge allows these pipes and wiring to move with the clamping assembly, preventing entanglement.

[0041] The 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 clamp can move the container toward the cap clamping device and the liquid filling tube. The container can be a volumetric flask 2, and the clamping jaws of the clamp clamp 2 clamp the slender neck of the volumetric flask 2.

[0042] 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 the two clamping cover devices.

[0043] The base can be in various forms. For example, the base is two pillars 20 , which are respectively set 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 .

[0044] 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.

[0045] Further optionally, through holes are respectively provided at both ends of the sliding seat 13, the direction of the through holes is vertical, 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.

[0046] 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 the two clamping cover devices 16 are installed on the front side of the sliding seat 13, and the distance between the clamping heads 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.

[0047] Further optionally, the cover clamping device 16 includes a third motor 11 and a clamping head 32, the rotating shaft of the third motor 11 is vertically downward, the clamping head 32 is connected to the bottom end of the rotating shaft of the third motor 11, and the third motor 11 can drive the clamping head 32 to rotate;

[0048] The clamping head 32 has a built-in electromagnetic controller, which is connected to the two second clamping jaws of the clamping head 32 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.

[0049] 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 approach or move away from each other along the hollow track.

[0050] The clamping assembly clamps the two volumetric flasks 2 and moves along the first track rod 6 toward the first motor 9. When the clamping assembly moves to the bottom of the capping device, the clamping head 32 of the capping device corresponds to the bottle mouth of the volumetric flask one by one up and down. 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 capping device to move downward; at the same time, the electromagnetic controller controls the two clamping jaws 2 to move away from each other, so that the bottle cap of the bottle mouth of the volumetric flask can be placed between the two clamping jaws 2. The electromagnetic controller then controls the two clamping jaws 2 to move closer to each other, and the clamping jaws 2 clamp the bottle cap; the third motor 11 drives the clamping head 32 to rotate and unscrew the bottle cap. 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 flask.

[0051] After the liquid addition is completed, according to the above method, the bottle cap clamped by the clamping device in the above steps is rotated and lowered again, and screwed back to the mouth of the volumetric flask.

[0052] 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 arranged horizontally, 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 the external liquid storage container through a pipeline.

[0053] Optionally, the connecting frame 17 includes two horizontal cross plates 34 and a vertical vertical plate 35. The upper and lower ends of the vertical plates 35 are fixedly connected to the ends of the upper and lower cross plates 34, respectively. The head ends of the two cross plates 34 point toward the clamping assembly. The upper and lower ends of the third rail rods 8 are connected to the head ends of the upper and lower cross plates 34, respectively. The two third rail rods 8 are arranged in a row, and the line connecting the two third rail rods 8 is parallel to the width direction of the vertical plates 35. From the side, the third rail rods, the two cross plates 34, and the vertical plates 35 form a square.

[0054] Further optionally, the two third track rods and the third screw rod 5 are arranged in a straight line, and the liquid adding frame 15 is parallel to the straight line; the liquid adding frame 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 frame 15, and the liquid adding tube 18 vertically passes through one end of the liquid adding frame 15. Preferably, the third screw rod 5, the two third track rods and the two liquid adding tubes are on the same vertical plane.

[0055] 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 adapted to 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.

[0056] 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 portion of the baffle 38 extends upward from the liquid adding rack 15;

[0057] 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 moving into the groove.

[0058] After the caps of the two volumetric flasks are unscrewed, the second motor 10 controls the upward movement of the sliding seat 13. At this time, the liquid adding frame 15 is close to the top of the third rail. After the sliding seat 13 moves up to the bottom of the two liquid adding tubes above the mouths of the volumetric flasks, the liquid adding tubes do not affect the movement of the volumetric flasks. The first motor 9 controls the clamping assembly to move a short distance away from the support, so that the mouths of the volumetric flasks are directly below the corresponding liquid adding tubes. Then, the second motor 10 controls the downward movement of the sliding seat 13. At the same time, the fourth motor 12 controls the rotation of the third screw rod 5, thereby driving the liquid adding frame 15 to descend along the third rail, thereby driving the liquid adding tubes to descend. The second rail is longer than the third rail, and both are vertical. The second rail provides a relatively large lifting space for the liquid adding tube, and also provides lifting space for the clamping cover device. The third rail provides a relatively small lifting space for the liquid adding tube. That is, the large lifting and lowering of the liquid adding tube is controlled by the second motor 10 and the second screw rod 4, and the small adjustment is controlled by the fourth motor 12 and the third screw rod 5, which can achieve precise control of the position of the liquid adding tube. The external thread of the third screw rod 5 can be set more finely, so that the movement of the liquid adding rack 15 is smaller and more precise.

[0059] The bottom of the 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 adding tube. As the liquid level in the volumetric flask continues to rise, the adding tube also rises. 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 adding tube, so that the adding tube releases liquid drop by drop, and then cooperates with the small increase of the adding tube to make liquid addition more accurate. When the center of the liquid level reaches the constant volume line at the bottom, stop dripping liquid. The adding tube rises and leaves the volumetric flask, and the clamping cover device covers the two volumetric flasks with bottle caps.

[0060] The groove of the stopper mother component 37 faces the clamping assembly, and the sensing surface of sensor 2 also faces the clamping assembly. When the liquid adding frame 15 leads the stopper sub-component 36 to rise and fall beneath the stopper mother component 37, the baffle 38 does not block the sensing surface of sensor 2, and the fourth motor 12 operates normally. When the stopper sub-component 36 moves upward with the liquid adding frame 15 to the middle and upper part of the baffle 38, blocking the sensing surface of sensor 2, sensor 2 senses the baffle 38 and forcibly stops the operation of the fourth motor 12. At this time, the top of the liquid adding frame 15 is a short distance away from the upper horizontal plate. The use of the stopper mother component 37 and the stopper sub-component 36 prevents the liquid adding frame 15 from rising too far and colliding with the upper horizontal plate.

[0061] 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 one is a conventional finger cylinder, and controller two and controller three are both conventional controllers. Sensor one, sensor two and sensor three are all conventional sensors, such as infrared sensors, which can emit rays to sense objects in front. Sensor one is connected to the clamper, and when sensor one senses that there is a container in front, it controls the clamper to clamp the container. Sensor two is connected to the fourth motor 12, and when sensor two senses that there is a baffle 38 in front, it controls the fourth motor 12 to stop working.

[0062] The present invention utilizes a device that coordinates the movement of three sets of screw rods, track rods, and a sliding device (sliding base 14, sliding seat 13, and liquid adding rack 15). As the sliding device moves along its corresponding track rods, it may become skewed. Since the track rods extend through the through-holes of the sliding device, if the track rods are parallel to the through-holes, the sliding device can move smoothly. However, if the sliding device is skewed, the through-holes and the track rods become non-parallel, causing the sliding device to become stuck on the track rods, preventing the screw rods from moving the sliding device and damaging the screw rods. To address this issue, the present invention provides the following solution.

[0063] 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 hole, and the two circles of grooves 39 are respectively close to the two ends of the through hole; a number of balls 40 are embedded in the grooves 39, and the balls are spherical. Adjacent balls contact each other, and 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.

[0064] 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.

[0065] Further optionally, the end of the sliding base 14 corresponds to a first track rod, and both ends of the sliding base 14 are referred to as 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.

[0066] A first deflection corrector 43 is provided on the side of the front end of the first end portion 41. A horizontal first tunnel 44 is provided inside the front end of the first end portion 41. 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. The telescopic rod 45 of the first deflection corrector 43 passes through the first tunnel 44.

[0067] A second deviation corrector 49 is provided on the side 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 of the sliding base 14 and is connected to the external environment, and the telescopic rod of the second deviation corrector passes through the second tunnel; the first deviation corrector 43 and the second deviation corrector are on the same side of the first end 41.

[0068] The first deflection corrector 43 and the second deflection corrector may both be located on the outside of the first end portion 41 (ie, the side away from the first screw rod 3 ), or may both be located on the inside of the first end portion 41 (ie, the side facing the first screw rod 3 ).

[0069] The groove has three side surfaces. Two opposing side surfaces are parallel to each other and perpendicular to the first track bar. The other side surface is a bottom surface 46 of the groove. This bottom surface 46 is parallel to and faces the first track bar. This bottom surface 46 is circular and concentric with the first track bar. The ball 40 faces the bottom surface 46 of the groove, the outer surface of the first track bar, and the two side surfaces of the groove in the four directions of top, bottom, left, and right. In other words, the bottom surface, three side surfaces of the groove, and the first track bar support and constrain the ball's position.

[0070] 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 provided 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;

[0071] A pressure sensing device is provided in the second controller 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 is pressing the telescopic rod outward, further indicating that the first track rod is pressing 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, thereby restoring the through hole of the sliding base 14 to a parallel state with the first track rod.

[0072] 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 the hole formed on the outer side of the first end 41 of the second tunnel, 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 is provided on the side of the support away from the outer side surface 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 surface of the telescopic rod is flush with the bottom surface of the groove;

[0073] 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 is pressing the telescopic rod outward, which further indicates that the first track rod is pressing 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.

[0074] As a specific embodiment, a first corrector 43 and a second corrector are respectively provided on the outer sides of the front and rear ends of any first end portion 41 of the sliding base 14. The first tunnel 44 and the second tunnel are on the same horizontal plane and are both located in the middle of the height direction of the first end portion 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 portion 41 tilts away from the first track rod and the rear end of the first end portion 41 tilts toward the first track rod, the sliding base 14 becomes 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 portion 41 is subjected to pressure. A portion of the ball is pressed into the second tunnel and squeezes the corresponding starting end of the telescopic rod. The telescopic rod is subjected to pressure. The pressure sensing device of the second corrector senses that the pressure is greater than the preset pressure. The second controller of the second 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 portion 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, and the end face of the front end of the telescopic rod returns to its initial state. The ball in the groove at the rear end of the first end portion 41 does not press the telescopic rod. After the second deviation corrector detects that the pressure value is qualified, it restarts the first motor 9 and resumes the movement of the sliding base 14.

[0075] For another example, the front end of the first end portion 41 tilts toward the direction approaching 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 portion 41 is under pressure, a portion 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 corrector 43 senses that the pressure is greater than the preset pressure, the controller 2 of the first 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 portion 41 away from the first track rod. When the first through hole 42 of the first end portion 41 returns to being parallel to the first track rod, the first corrector 43 withdraws the telescopic rod, the end face of the telescopic rod returns to its initial state, the ball in the groove at the front end of the first end portion 41 no longer presses the telescopic rod, and after the first corrector 43 detects that the pressure value is qualified, it restarts the first motor 9 and resumes the movement of the sliding base 14.

[0076] Further optionally, the end of the sliding seat 13 corresponds to a second track rod, and both ends of the sliding seat 13 are referred to as second ends. A second through hole is provided in the center of the second end, and the second track rod passes through the second through hole.

[0077] A third deviation corrector is provided on the side surface 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 surface of the sliding seat 13 and is connected to the external environment. The telescopic rod of the third deviation corrector passes through the third tunnel;

[0078] A fourth corrector is provided on the side surface of the upper end of the second end portion. A fourth horizontal tunnel is provided within the upper end portion of the second end portion. One end of the fourth tunnel is connected to the corresponding groove, and the other end extends through the outer side surface of the sliding seat 13 and is connected to the external environment. The telescopic rod of the fourth corrector extends through the fourth tunnel. The third and fourth correctors are located on the same side of the second end portion. The structure and function of the third and fourth correctors are the same as those of the first corrector 43.

[0079] As a specific embodiment, a third and a fourth corrector are respectively provided on the outer sides of the lower and upper ends of any second end portion of the sliding seat 13. The third and fourth tunnels are on the same vertical plane and are both located in the middle of the thickness direction of the second end portion. 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 portion tilts away from the second track rod, and the upper end of the second end portion tilts toward 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 portion is under pressure, and a portion of the ball is pressed into the fourth tunnel and squeezes the corresponding starting end of the telescopic rod. The telescopic rod is under pressure, and the pressure sensing device of the fourth corrector senses that the pressure is greater than the preset pressure. The fourth corrector pushes the telescopic rod to push the ball back into the groove. At the same time, the ball acts on the second track rod to push the upper end of the second end portion 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 corrector withdraws the telescopic rod, and the end face of the telescopic rod returns to its initial state. The ball in the groove at the upper end of the second end does not press the telescopic rod. After the fourth corrector detects that the pressure value is qualified, it restarts the second motor 10 and resumes the movement of the sliding seat 13.

[0080] For another example, the lower end of the second end portion tilts toward the second track rod, the sliding seat 13 is stuck and stops moving, and the ball corresponding to the third tunnel in the groove at the lower end of the second end portion is under pressure. A portion of the ball is pressed into the third tunnel and squeezes the corresponding starting end of the telescopic rod. The telescopic rod is under pressure, and the pressure sensing device of the third corrector senses that the pressure is greater than the preset pressure. The third corrector pushes the telescopic rod to push the ball back into the groove. At the same time, the ball acts on the second track rod, pushing the lower end of the second end portion away from the second track rod. When the second through hole of the second end portion returns to being parallel to the second track rod, the third corrector withdraws the telescopic rod, and the end face of the telescopic rod returns to its initial state. The ball in the groove at the lower end of the second end portion no longer presses the telescopic rod. After the third corrector detects that the pressure value is qualified, it restarts the second motor 10 and resumes the movement of the sliding seat 13.

[0081] The liquid-adding rack 15 of the present invention does not include a deflection corrector similar to the aforementioned one. This is because the sliding base 14 is connected to the first rails at both ends and the first screw 3 in the middle. The screw is relatively far from the rails, and the screw controls the movement of the middle portion of the sliding base 14. However, the ends of the sliding base 14 are prone to tilting. The same applies to the sliding base 13. However, the middle portion of the liquid-adding rack 15 is connected to the third screw 5 and the two third rails. The distance between the third screw 5 and the third rails is relatively small. In addition, the liquid-adding pipes at both ends of the liquid-adding rack act as counterweights, making the liquid-adding rack 15 less prone to tilting.

[0082] 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.

[0083] Optionally, a sensor 3 is mounted 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;

[0084] A telescopic support device is provided on the lower horizontal plate 34 of the connecting frame 17. The telescopic support device includes a support base 29, a telescopic sleeve 26, and several vertical secondary telescopic rods 25. The telescopic sleeve 26 is mounted on the outside of the third screw 5. A support ring 33 is provided on the top of the telescopic sleeve 26 to support the liquid adding rack 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 vertical extension and contraction of the secondary telescopic rod 25, thereby driving the top of the telescopic sleeve 26 to rise and fall, thereby adjusting the height of the telescopic sleeve 26. Several secondary telescopic rods 25 are evenly arranged along the circumference of the support ring 33.

[0085] 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 flexible material and can be folded for easy telescopic operation; the support ring 33 and the secondary telescopic rod 25 are made of rigid material to facilitate supporting the liquid adding rack 15.

[0086] Without the telescopic support device, the liquid-adding frame 15 is supported solely by the third screw 5. When the liquid-adding frame 15 is suspended at a certain position on the third screw 5 and the liquid-adding tube is adding liquid into the volumetric flask, the fixing of the liquid-adding frame 15 relies solely on the threaded connection. Over time, this can wear out the threads of the third screw 5. As mentioned earlier, the external threads of the third screw 5 can be custom-made, so the third screw 5 should be protected. The telescopic support device provides an additional layer of support for the suspended liquid-adding frame 15, and the telescopic sleeve 26 covers the outside of the third screw 5, protecting it through physical isolation.

[0087] 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.

[0088] 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.

[0089] 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 testing device, characterized in that: The container comprises a clamping assembly, a horizontal moving assembly, a vertical moving assembly and a vertical moving sub-assembly. The clamping assembly comprises at least one clamp for clamping a container. 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 clamp 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 lid 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; The clamping assembly comprises, from top to bottom, two clamps, two support rods and a sliding base. The two clamps are arranged side by side, the two support rods are arranged side by side, and the clamps are arranged horizontally 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 arranged vertically, 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; 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 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 rods connect 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 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.

2. The automatic liquid adding experimental testing device according to claim 1, characterized in that: A horizontal connecting plate 2 is provided below the two clamps, 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. 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.

3. The automatic liquid adding experimental testing 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 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 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.

4. The automatic liquid adding experimental testing 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 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 side of the sliding seat facing the clamping assembly is connected to the two clamping cover devices.

5. The automatic liquid adding experimental testing device according to claim 4, characterized in that: 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.

6. The automatic liquid adding experimental testing device according to claim 1, 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, the upper middle portion of the baffle protruding upward from the liquid adding rack; A limit female component is provided on the vertical side surface of the head end of the upper horizontal plate facing the clamping assembly. The limit female component has a groove. A second sensor is provided in the groove for sensing the blocking piece moving into the groove.

7. The automatic liquid adding experimental testing device according to claim 4, 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 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, the second track rod or the third track rod.

8. The automatic liquid adding experimental testing device according to claim 6, 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 horizontal plate below the connecting frame. 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. 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 up and down extension of the secondary telescopic rod to drive the top of the telescopic sleeve to rise and fall and adjust the height of the telescopic sleeve.

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