A pipetting device for chemical engineering

Abstract

The present invention relates to the field of chemical equipment, and particularly relates to a pipetting device for chemical engineering, which comprises a base and a vertical plate, and also comprises a cushion plate, a rotating mechanism, a lifting mechanism and a cleaning mechanism. The lifting mechanism comprises a lifting plate and a driving component. Three guide rails are fixedly arranged on the outer wall of the top of the vertical plate. The rotating mechanism comprises a turntable, an electric control component, a telescopic component and two transfer components. The electric control component is arranged on the top of the lifting plate, the telescopic component is arranged on the turntable, and the two transfer components are both arranged on the telescopic component. The cleaning mechanism comprises a blowing pipe, a sliding component and an extrusion component. The sliding component is arranged on the top of the base, the extrusion component is arranged on the sliding component, and the blowing pipe is arranged on the sliding component. The pipetting device for chemical engineering of the present invention can transfer chemical solutions with different properties, such as acidic chemical solutions and alkaline chemical solutions, to meet different usage requirements, thereby improving the flexibility and practicality of the device.

Description

Technical Field

[0001] The present invention relates to the field of chemical equipment, and particularly to a pipetting device for chemical engineering. Background Art

[0002] The pipetting work in chemical engineering mainly refers to the process of accurately transferring liquid samples in the laboratory, usually completed using tools such as pipettes, pipetting guns or pipetting workstations. This process is widely used in many fields such as chemical analysis, drug research and development, and biological sample processing.

[0003] The existing pipetting devices have the following deficiencies:

[0004] 1. When transferring a chemical solution of one property and then transferring a chemical solution of another property, it is necessary to manually clean and wipe the previous transfer head, and then perform the suction and transfer of the solution, which is time-consuming and laborious, and reduces the efficiency of transferring chemical solutions of different properties.

[0005] 2. When transferring chemical solutions, it is not possible to clean the used pipette tips synchronously, and the cleaning operation of the pipette tips can only be carried out after the transfer work is completed, thus reducing the cleaning efficiency and making it inconvenient to quickly start the next pipetting work. Summary of the Invention

[0006] The purpose of the present invention is to provide a pipetting device for chemical engineering.

[0007] To achieve this purpose, the present invention adopts the following technical solutions:

[0008] Provide a pipetting device for chemical engineering, including a base and a vertical plate, the vertical plate is fixedly arranged on the top of the base;

[0009] It further includes a backing plate, a rotating mechanism, a lifting mechanism and a cleaning mechanism;

[0010] The backing plate is fixedly arranged on the top of the base;

[0011] The lifting mechanism is arranged on the top of the vertical plate. The lifting mechanism includes a lifting plate and a driving component. Three guide rails are fixedly arranged on the outer wall of the top of the vertical plate. The lifting plate is slidably arranged between the three guide rails through three sliders, and the driving component is arranged on the outer wall of the vertical plate;

[0012] The rotating mechanism is arranged on the lifting plate. The rotating mechanism includes a turntable, an electric control component, a telescopic component and two transfer components. The turntable is rotatably arranged at one end of the lifting plate away from the vertical plate through a rotating shaft. The electric control component is arranged on the top of the lifting plate. The telescopic component is arranged on the turntable, and the two transfer components are both arranged on the telescopic component;

[0013] The cleaning mechanism is arranged at the top of the base. The cleaning mechanism includes a blowing pipe, a sliding assembly and an extrusion assembly. The sliding assembly is arranged at the top of the base. The extrusion assembly is arranged on the sliding assembly. The blowing pipe is arranged on the sliding assembly.

[0014] Furthermore, the driving assembly includes a first motor, a lead screw and two limit blocks. The two limit blocks are both fixedly arranged on the outer wall of the vertical plate. The lead screw is rotatably arranged between the two limit blocks. The first motor is fixedly arranged on the top of one of the limit blocks, and its output end is fixedly connected to the top end of the lead screw. One of the sliders close to the vertical plate is threadedly connected to the lead screw.

[0015] Furthermore, the electric control assembly includes a second motor, a driving wheel, a driven wheel and a belt. The second motor is fixedly arranged on the top of the lifting plate. The driving wheel is fixedly arranged on its output end. The driven wheel is fixedly arranged on the top end of the rotating shaft. The belt is sleeved between the driving wheel and the driven wheel.

[0016] Furthermore, the telescopic assembly includes an electric push rod, a push block, a slide bar, a plug rod and a U-shaped plate. A slideway is fixedly arranged on the top of the turntable. The slide bar is slidably arranged inside the slideway. The plug rod is fixedly arranged on the top of the slide bar, and the top of the plug rod passes through the slideway. The push block is fixedly arranged between the top end of the plug rod and the output end of the electric push rod. The U-shaped plate is fixedly arranged at the bottom of the slide bar.

[0017] Furthermore, a telescopic spring is sleeved on the outer wall of the plug rod, and the inner wall of the slideway and the top of the slide bar respectively abut against the two ends of the telescopic spring.

[0018] Furthermore, each transfer assembly includes a first extrusion rod, a sleeve, a conical pipette tip and a sealing block. A mounting bracket is fixedly arranged at the bottom of the turntable. The sleeve is fixedly arranged at one end of the mounting bracket. The first extrusion rod is inserted on the sleeve, and the top end of the first extrusion rod is fixedly connected to one end of the bottom of the U-shaped plate, and the first extrusion rod is slidably connected to the turntable. A liquid through hole is opened at the bottom of the sleeve. The conical pipette tip is fixedly arranged at the bottom of the liquid through hole. The sealing block is sleeved on the outer wall of the conical pipette tip close to the sleeve.

[0019] Furthermore, the sliding assembly includes a third motor, a synchronous belt, a traction block, a sliding plate and two synchronous wheels. A slide rail is fixedly arranged at the top of the base. The sliding plate is slidably arranged on the top of the slide rail. Two support plates are fixedly arranged at the top of the base. Each synchronous wheel is rotatably arranged on the top of one support plate through a hinge shaft. The synchronous belt is sleeved between the two synchronous wheels. The third motor is fixedly arranged on the outer wall of one of the support plates, and its output end is fixedly connected to the end of one of the hinge shafts. The traction block is fixedly arranged between the sliding plate and the synchronous belt.

[0020] Further, the extrusion assembly includes a fourth motor, a wedge-shaped rotating tube, a ball, a return spring, a second extrusion rod, a cylinder, and a heating cylinder. The fourth motor is fixedly arranged on the top of the slide plate, and the wedge-shaped rotating tube is fixedly arranged on its output end. The cylinder is fixedly arranged on the top of the slide plate. The second extrusion rod is slidably arranged on the top of the slide plate through a limiting plate, and the second extrusion rod is inserted into the cylinder. A flange is fixedly arranged at one end of the second extrusion rod away from the cylinder. The return spring is sleeved on the outer wall of the second extrusion rod, and the flange and the limiting plate respectively abut against both ends of the return spring. The ball is rotatably arranged on the outer wall of the flange away from the second extrusion rod. An air outlet is formed at one end of the cylinder away from the second extrusion rod. The heating cylinder is fixedly arranged on the outer wall of the air outlet. Two electric heating plates are fixedly arranged inside the heating cylinder. A ventilation hole is arranged at one end of the heating cylinder away from the cylinder. The outer wall of the wedge-shaped rotating tube is attached to the ball. The blow tube is fixedly arranged on the outer wall of the ventilation hole.

[0021] Further, a first lap sleeve, a second lap sleeve, a third lap sleeve, and a fourth lap sleeve are equidistantly arranged on the top of the backing plate, and the bottoms of the first lap sleeve, the second lap sleeve, the third lap sleeve, and the fourth lap sleeve are fixedly connected to the top of the backing plate.

[0022] Further, two guide rods are fixedly arranged on the top of the turntable, and the U-shaped plate is slidably connected to both guide rods.

[0023] Advantages of the present invention:

[0024] 1. By designing the backing plate, the rotating mechanism, the lifting mechanism, and the cleaning mechanism, and enabling the four to cooperate with each other, the present invention can transfer chemical solutions of different properties, such as acidic chemical solutions and alkaline chemical solutions, to meet different usage requirements, thereby improving the flexibility and practicality of the present device.

[0025] 2. Through the rotating mechanism, the present invention can drive the two pipette heads to rotate flexibly, so that a clean conical pipette head can be provided as a spare no matter which property of chemical solution needs to be transferred, and the other one can be cleaned synchronously. This not only ensures the smooth implementation of the pipetting work in chemical engineering and improves the pipetting efficiency, but also prevents cross-contamination and damage caused by a single pipette head sucking chemical solutions of different properties.

[0026] 3. The cleaning mechanism of the present invention includes a blow pipe, a sliding assembly, and an extrusion assembly. After the blow pipe on the top of the slide plate approaches the conical pipette tip above the fourth lap joint sleeve, the sliding assembly and the extrusion assembly are started by the controller, thereby driving the extrusion rod to push towards the end close to the heating cylinder inside the air cylinder. The pushed air flow enters the inside of the blow pipe after being heated by the two electric heating plates in the heating cylinder, and then is blown from the blow pipe to the conical pipette tip above the fourth lap joint sleeve, so that the residual deionized water adhered to the conical pipette tip can be blown off, and at the same time, it has a drying effect, eliminating the need for manual wiping, accelerating the next chemical pipetting operation, and significantly improving the pipetting efficiency.

[0027] 4. By arranging containers at the tops of the first lap joint sleeve, the second lap joint sleeve, the third lap joint sleeve, and the fourth lap joint sleeve respectively, the container in the first lap joint sleeve is used to hold chemical solutions to be pumped with different properties, the second lap joint sleeve is used to place the container to be transferred, the container in the third lap joint sleeve is used to hold deionized water, and the container in the fourth lap joint sleeve is used to hold the mixture of deionized water and chemical solutions with different chemical properties after cleaning the conical pipette tip. It can not only meet the transfer work of chemical solutions with different properties and the cleaning work of the conical pipette tip, but also collect the cleaning mixture generated when cleaning the conical pipette tip in the container on the fourth lap joint sleeve, facilitating subsequent pouring and preventing the device from getting dirty.

[0028] 5. By arranging the telescopic spring, since the telescopic spring is sleeved on the outer wall of the insertion rod, and the inner wall of the slideway and the top of the slide bar respectively abut against the two ends of the telescopic spring, the U-shaped plate can be ensured to lift and lower uniformly, thus driving the two first extrusion rods to lift and lower uniformly, realizing the uniform extraction or extrusion of chemical solutions, preventing splashing, reducing potential safety hazards, and avoiding waste of chemical solutions at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings in the embodiments of the present invention will be briefly introduced below.

[0030] Figure 1 is the three-dimensional structure schematic diagram of the present invention Figure 1 ;

[0031] Figure 2 is Figure 1 the enlarged view of part A in

[0032] Figure 3 is Figure 1 the enlarged view of part B in

[0033] Figure 4 is the three-dimensional structure schematic diagram of the present invention Figure 2 ;

[0034] Figure 5 isFigure 4 Enlarged view at position C in

[0035] Figure 6 Side view of the present invention;

[0036] Figure 7 Schematic three - dimensional structure diagram of the cleaning mechanism of the present invention;

[0037] Figure 8 is Figure 7 Enlarged view at position D in

[0038] Figure 9 Schematic cross - sectional structure diagram of one of the sleeves of the present invention;

[0039] In the figure: 1, vertical plate; 2, backing plate; 3, lifting plate; 4, slider; 5, turntable; 6, air blowing pipe; 7, first motor; 8, lead screw; 9, limit block; 10, second motor; 11, driving wheel; 12, driven wheel; 13, belt; 14, electric push rod; 15, pushing block; 16, slide bar; 17, inserting rod; 18, U - shaped plate; 19, telescopic spring; 20, first extrusion rod; 21, sleeve; 22, conical pipette tip; 23, sealing block; 24, third motor; 25, synchronous belt; 26, traction block; 27, sliding plate; 28, synchronous pulley; 29, fourth motor; 30, wedge - shaped rotating pipe; 31, ball; 32, reset spring; 33, second extrusion rod; 34, air cylinder; 35, heating cylinder; 36, flange; 37, electric heating plate; 38, first lap sleeve; 39, second lap sleeve; 40, third lap sleeve; 41, fourth lap sleeve; 42, guide rod. Detailed implementation manners

[0040] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation manners.

[0041] Among them, the accompanying drawings are only for illustrative purposes, showing only schematic diagrams, rather than physical diagrams, and should not be construed as a limitation to the present invention; in order to better illustrate the embodiments of the present invention, some components in the drawings are omitted, enlarged or reduced, and do not represent the dimensions of the actual product.

[0042] Refer to Figures 1 to 9 As shown, a pipetting device for chemical engineering includes a base and a vertical plate 1, and the vertical plate 1 is fixedly arranged on the top of the base;

[0043] It further includes a backing plate 2, a rotating mechanism, a lifting mechanism and a cleaning mechanism;

[0044] The backing plate 2 is fixedly arranged on the top of the base;

[0045] The lifting mechanism is arranged at the top of the vertical plate 1. The lifting mechanism includes a lifting plate 3 and a driving component. Three guide rails are fixedly arranged on the outer wall of the top of the vertical plate 1. The lifting plate 3 is slidably arranged between the three guide rails through three sliders 4. The driving component is arranged on the outer wall of the vertical plate 1;

[0046] The rotating mechanism is arranged on the lifting plate 3. The rotating mechanism includes a turntable 5, an electric control component, a telescopic component and two transfer components. The turntable 5 is rotatably arranged at one end of the lifting plate 3 away from the vertical plate 1 through a rotating shaft. The electric control component is arranged on the top of the lifting plate 3. The telescopic component is arranged on the turntable 5. The two transfer components are both arranged on the telescopic component;

[0047] The cleaning mechanism is arranged at the top of the base. The cleaning mechanism includes a blowpipe 6, a sliding component and an extrusion component. The sliding component is arranged at the top of the base. The extrusion component is arranged on the sliding component. The blowpipe 6 is arranged on the sliding component.

[0048] Refer to Figures 1 to 9 As shown, the driving component includes a first motor 7, a lead screw 8 and two limit blocks 9. The two limit blocks 9 are both fixedly arranged on the outer wall of the vertical plate 1. The lead screw 8 is rotatably arranged between the two limit blocks 9. The first motor 7 is fixedly arranged on the top of one of the limit blocks 9, and its output end is fixedly connected to the top end of the lead screw 8. One of the sliders 4 close to the vertical plate 1 is threadedly connected to the lead screw 8. This device is equipped with a controller, and each electrical device in the device is electrically connected to the controller. When it is necessary to transfer the acidic chemical solution in the container on the first lap sleeve 38 to the container in the second lap sleeve 39, first start the first motor 7 through the controller, so that its output end drives the lead screw 8 to rotate. Since the lead screw 8 is rotatably connected to the two limit blocks 9, one of the sliders 4 close to the vertical plate 1 is threadedly connected to the lead screw 8, the three guide rails are all fixedly connected to the vertical plate 1, and the lifting plate 3 is slidably connected to the three guide rails through the three sliders 4, thereby driving the lifting plate 3 to descend. Since the turntable 5 is designed on the lifting plate 3 through a rotating shaft, when the lifting plate 3 descends, it will drive the turntable 5 and the two conical liquid transfer heads 22 at the bottom of the turntable 5 to descend vertically until the two conical liquid transfer heads 22 are respectively inserted into the containers in the first lap sleeve 38 and the third lap sleeve 40, that is, the two conical liquid transfer heads 22 are respectively inserted into the acidic chemical solution and deionized water, and then cut off the power supply of the first motor 7 through the controller to stop the descent of the lifting plate 3.

[0049] Refer to Figures 1 to 9As shown, the electric control component includes a second motor 10, a driving wheel 11, a driven wheel 12 and a belt 13. The second motor 10 is fixedly arranged at the top of the lifting plate 3, the driving wheel 11 is fixedly arranged on its output end, the driven wheel 12 is fixedly arranged at the top end of the rotating shaft, and the belt 13 is sleeved between the driving wheel 11 and the driven wheel 12. When the lifting plate 3 drives the two conical pipette heads 22 sucking acidic chemical solution and deionized water to rise to the initial position, the second motor 10 is started through the controller, and its output end rotates counterclockwise by 90 degrees first. Since its output end is fixedly connected to the driving wheel 11, the driven wheel 12 is fixedly connected to the top end of the rotating shaft, the turntable 5 is fixedly connected to the bottom end of the rotating shaft, and the driving wheel 11 and the driven wheel 12 are sleeved through the belt 13, the two conical pipette heads 22 are driven to rotate to the positions directly above the second lap joint sleeve 39 and the fourth lap joint sleeve 41 respectively. Then, the sucked acidic chemical solution and deionized water are respectively extruded into the containers in the second lap joint sleeve 39 and the fourth lap joint sleeve 41 through the telescopic component and the two transfer components, so as to realize the transfer of the acidic chemical solution. At the same time, the cleaning of the other conical pipette head 22 that does not suck the acidic chemical solution and the discharge of the mixed solution after cleaning are realized, preparing for its subsequent sucking of the alkaline chemical solution. Then, the two conical pipette heads 22 are removed from the two containers again through the lifting plate 3, the container filled with the alkaline chemical solution replaces the container filled with the acidic chemical solution on the first lap joint sleeve 38, and then the controller drives the turntable 5 to rotate by 90 degrees continuously, and the lifting plate 3 drives the two conical pipette heads 22 to descend into the containers on the first lap joint sleeve 38 and in the third lap joint sleeve 40 to suck the alkaline chemical solution and the deionized water. Then, the controller drives the turntable 5 to rotate by 90 degrees, and cooperates with the two telescopic components to realize the transfer of the alkaline chemical solution and the cleaning of the conical pipette head 22 that previously sucked the acidic chemical solution and the discharge of the mixed solution after cleaning. Thus, no matter which property of the chemical solution needs to be transferred, a clean conical pipette head 22 is provided as a spare in this device, and the other one can be cleaned synchronously, which not only ensures the smooth implementation of the pipetting work in chemical engineering, improves the pipetting efficiency, but also prevents cross-contamination and damage caused by a single pipette head sucking chemical solutions of different properties.

[0050] Refer to Figures 1 to 9As shown in the figure, the telescopic component includes an electric push rod 14, a push block 15, a slide bar 16, a plug rod 17, and a U-shaped plate 18. A slideway is fixedly arranged at the top of the turntable 5. The slide bar 16 is slidably arranged inside the slideway. The plug rod 17 is fixedly arranged at the top of the slide bar 16, and the top of the plug rod 17 passes through the slideway. The push block 15 is fixedly arranged between the top end of the plug rod 17 and the output end of the electric push rod 14. The U-shaped plate 18 is fixedly arranged at the bottom of the slide bar 16. After the two conical pipette tips 22 are respectively inserted into the acidic chemical solution and deionized water, the electric push rod 14 is started through the controller, so that its output end extends upward. Since its output end is fixedly connected to the U-shaped plate 18 through the push block 15, the plug rod 17, and the slide bar 16, the U-shaped plate 18 is driven to rise vertically.

[0051] Refer to Figures 1 to 9 As shown in the figure, a telescopic spring 19 is sleeved on the outer wall of the plug rod 17. The inner wall of the slideway and the top of the slide bar 16 respectively abut against both ends of the telescopic spring 19. Since the telescopic spring 19 is sleeved on the outer wall of the plug rod 17, and the inner wall of the slideway and the top of the slide bar 16 respectively abut against both ends of the telescopic spring 19, the U-shaped plate 18 can be ensured to rise and fall at a uniform speed, thus driving the two first extrusion rods 20 to rise and fall at a uniform speed, realizing the uniform extraction or extrusion of the chemical solution, preventing splashing, reducing potential safety hazards, and at the same time avoiding waste of the chemical solution.

[0052] Refer to Figures 1 to 9 As shown in the figure, each transfer component includes a first extrusion rod 20, a sleeve 21, a conical pipette tip 22, and a sealing block 23. An installation frame is fixedly arranged at the bottom of the turntable 5. The sleeve 21 is fixedly arranged at one end of the installation frame. The first extrusion rod 20 is inserted on the sleeve 21, and the top end of the first extrusion rod 20 is fixedly connected to one end of the bottom of the U-shaped plate 18, and the first extrusion rod 20 is slidably connected to the turntable 5. A liquid passing hole is opened at the bottom of the sleeve 21. The conical pipette tip 22 is fixedly arranged at the bottom of the liquid passing hole. The sealing block 23 is sleeved on the outer wall of the conical pipette tip 22 near the sleeve 21. When the U-shaped plate 18 rises vertically at a uniform speed, since one end of the first extrusion rod 20 is slidably connected to the turntable 5 and the other end of the first extrusion rod 20 is inserted into the sleeve 21, the first extrusion rod 20 rises uniformly inside the sleeve 21. Using the negative pressure principle, the acidic chemical solution is successively sucked into the inside of the conical pipette tip 22 directly above the first lap joint sleeve 38 from the conical pipette tip 22 and the liquid passing hole. The deionized water is sucked into the inside of the conical pipette tip 22 directly above the third lap joint sleeve 40 through another symmetrically designed transfer component. Then, the conical pipette tip 22 is driven to leave the two containers through the lifting plate 3, that is, the conical pipette tip 22 is driven by the lifting plate 3 to rise to the initial position.

[0053] Refer to Figures 1 to 9As shown, the sliding assembly includes a third motor 24, a synchronous belt 25, a traction block 26, a sliding plate 27 and two synchronous pulleys 28. A slide rail is fixedly provided at the top of the base. The sliding plate 27 is slidably arranged on the top of the slide rail. Two support plates are fixedly provided at the top of the base. Each synchronous pulley 28 is rotatably arranged on the top of a support plate through a hinge shaft. The synchronous belt 25 is sleeved between the two synchronous pulleys 28. The third motor 24 is fixedly arranged on the outer wall of one of the support plates, and its output end is fixedly connected to the end of one of the hinge shafts. The traction block 26 is fixedly arranged between the sliding plate 27 and the synchronous belt 25. After each cleaning of the conical pipetting head 22 and squeezing the cleaned mixed liquid into the container on the fourth overlapping sleeve 41, the third motor 24 is started through the controller, so that its output end rotates clockwise. Since its output end is fixedly connected to one of the hinge shafts, each synchronous pulley 28 is rotatably connected to a support plate through a hinge shaft, the two synchronous pulleys 28 are sleeved through the synchronous belt 25, the sliding plate 27 and the synchronous belt 25 are respectively fixedly connected to both ends of the traction block 26, and the sliding plate 27 is slidably connected to the slide rail, thereby driving the blow pipe 6 on the top of the sliding plate 27 to approach the conical pipetting head 22 above the fourth overlapping sleeve 41.

[0054] Referring to Figures 1 to 9As shown in the figure, the extrusion assembly includes a fourth motor 29, a wedge-shaped rotating tube 30, a ball 31, a return spring 32, a second extrusion rod 33, a cylinder 34, and a heating cylinder 35. The fourth motor 29 is fixedly arranged on the top of the slide plate 27, and the wedge-shaped rotating tube 30 is fixedly arranged on its output end. The cylinder 34 is fixedly arranged on the top of the slide plate 27. The second extrusion rod 33 is slidably arranged on the top of the slide plate 27 through a limiting plate, and the second extrusion rod 33 is inserted into the cylinder 34. A flange 36 is fixedly arranged at one end of the second extrusion rod 33 away from the cylinder 34. The return spring 32 is sleeved on the outer wall of the second extrusion rod 33. The flange 36 and the limiting plate respectively abut against both ends of the return spring 32. The ball 31 is rotatably arranged on the outer wall of one end of the flange 36 away from the second extrusion rod 33. An air outlet is formed at one end of the cylinder 34 away from the second extrusion rod 33. The heating cylinder 35 is fixedly arranged on the outer wall of the air outlet. Two electric heating plates 37 are fixedly arranged inside the heating cylinder 35. A ventilation hole is arranged at one end of the heating cylinder 35 away from the cylinder 34. The outer wall of the wedge-shaped rotating tube 30 is attached to the ball 31. The blowing pipe 6 is fixedly arranged on the outer wall of the ventilation hole. When the blowing pipe 6 on the top of the slide plate 27 approaches the conical pipette tip 22 above the fourth overlapping sleeve 41, the fourth motor 29 is started through the controller, and thus the wedge-shaped rotating tube 30 is driven to rotate through its output end. Since the outer wall of the wedge-shaped rotating tube 30 is attached to the ball 31, one end of the second extrusion rod 33 is slidably connected to the limiting plate, and the other end is inserted into the cylinder 34, the extrusion rod is driven to push towards the end close to the heating cylinder 35 inside the cylinder 34. The pushed air flow is heated by the two electric heating plates 37 inside the heating cylinder 35 and then enters the inside of the blowing pipe 6, and then is blown from the blowing pipe 6 to the conical pipette tip 22 above the fourth overlapping sleeve 41, so that the residual deionized water adhering to the conical pipette tip 22 can be blown off, and at the same time, it has a drying effect, eliminating the need for manual wiping, accelerating the next chemical pipetting work, and significantly improving the pipetting efficiency.

[0055] Refer to Figures 1 to 9 As shown in the figure, the first overlapping sleeve 38, the second overlapping sleeve 39, the third overlapping sleeve 40, and the fourth overlapping sleeve 41 are arranged at equal intervals on the top of the backing plate 2. The bottoms of the first overlapping sleeve 38, the second overlapping sleeve 39, the third overlapping sleeve 40, and the fourth overlapping sleeve 41 are fixedly connected to the top of the backing plate 2. Four containers are respectively placed on the tops of the first overlapping sleeve 38, the second overlapping sleeve 39, the third overlapping sleeve 40, and the fourth overlapping sleeve 41. The container inside the first overlapping sleeve 38 is used to hold the chemical solutions to be pumped with different properties. The second overlapping sleeve 39 is used to place the container to be transferred. The container inside the third overlapping sleeve 40 is used to hold deionized water. The container inside the fourth overlapping sleeve 41 is used to hold the mixed liquid of deionized water and chemical solutions with different chemical properties after cleaning the conical pipette tip 22.

[0056] Refer to Figures 1 to 9As shown, two guide rods 42 are fixedly arranged at the top of the turntable 5. The U-shaped plate 18 is slidably connected to both guide rods 42. When the U-shaped plate 18 moves vertically up and down, the two guide rods 42 play a role in limiting and guiding, so as to ensure the stable descent of the U-shaped plate 18, drive the two first extrusion rods 20 to move up and down stably, and realize the stable extraction or extrusion of chemical solutions.

[0057] The working principle of the present invention: Four containers are respectively placed on the tops of the first lap joint sleeve 38, the second lap joint sleeve 39, the third lap joint sleeve 40 and the fourth lap joint sleeve 41. The container in the first lap joint sleeve 38 is used to hold chemical solutions to be extracted with different properties. The second lap joint sleeve 39 is used to place the container to be transferred. The container in the third lap joint sleeve 40 is used to hold deionized water. The container in the fourth lap joint sleeve 41 is used to hold the mixture of deionized water and chemical solutions with different chemical properties after cleaning the conical pipette tip 22.

[0058] This device is equipped with a controller. Each electrical device in the device is electrically connected to the controller. When it is necessary to transfer the acidic chemical solution in the container on the first lap joint sleeve 38 to the container in the second lap joint sleeve 39, first start the first motor 7 through the controller, so that its output end drives the lead screw 8 to rotate. Since the lead screw 8 is rotatably connected to the two limit blocks 9, one of the sliders 4 close to the vertical plate 1 is threadedly connected to the lead screw 8. The three guide rails are fixedly connected to the vertical plate 1. The lifting plate 3 is slidably connected to the three guide rails through the three sliders 4, and then drives the lifting plate 3 to descend. Since the turntable 5 is designed on the lifting plate 3 through a rotating shaft, when the lifting plate 3 descends, it will drive the turntable 5 and the two conical pipette tips 22 at the bottom of the turntable 5 to descend vertically until the two conical pipette tips 22 are respectively inserted into the container in the first lap joint sleeve 38 and the container in the third lap joint sleeve 40, that is, the two conical pipette tips 22 are respectively inserted into the acidic chemical solution and deionized water, and then cut off the power supply of the first motor 7 through the controller to stop the descent of the lifting plate 3.

[0059] After the two conical pipette tips 22 are respectively inserted into the acidic chemical solution and deionized water, start the electric push rod 14 through the controller, so that its output end extends upward. Since its output end is fixedly connected to the U-shaped plate 18 through the push block 15, the insertion rod 17 and the slide bar 16, it drives the U-shaped plate 18 to rise vertically.

[0060] When the U-shaped plate 18 rises vertically at a uniform speed, since one end of the first extrusion rod 20 is slidably connected to the turntable 5 and the other end of the first extrusion rod 20 is inserted into the sleeve 21, the first extrusion rod 20 rises uniformly inside the sleeve 21. Using the negative pressure principle, the acidic chemical solution is successively sucked from the conical pipette tip 22 and the liquid passage hole into the inside of the conical pipette tip 22 directly above the first lap sleeve 38. The deionized water is sucked into the inside of the conical pipette tip 22 directly above the third lap sleeve 40 through another transfer assembly with a symmetric design. Then, the conical pipette tip 22 is driven by the lifting plate 3 to leave the two containers, that is, the conical pipette tip 22 is driven by the lifting plate 3 to rise to the initial position.

[0061] Since the telescopic spring 19 is sleeved on the outer wall of the insertion rod 17, and the inner wall of the slideway and the top of the slide bar 16 are respectively in contact with the two ends of the telescopic spring 19, the uniform lifting and lowering of the U-shaped plate 18 can be ensured, thereby driving the two first extrusion rods 20 to lift and lower uniformly, realizing the uniform extraction or extrusion of the chemical solution, preventing splashing, reducing potential safety hazards, and at the same time avoiding waste of the chemical solution.

[0062] After the lifting plate 3 drives the two conical pipette heads 22 sucking acidic chemical solution and deionized water to rise to the initial position, the second motor 10 is started through the controller, and its output end rotates counterclockwise by 90 degrees first. Since its output end is fixedly connected to the driving wheel 11, the driven wheel 12 is fixedly connected to the top end of the rotating shaft, and the turntable 5 is fixedly connected to the bottom end of the rotating shaft, and the driving wheel 11 and the driven wheel 12 are sleeved by the belt 13, so as to drive the two conical pipette heads 22 to rotate to the positions directly above the second lapping sleeve 39 and the fourth lapping sleeve 41 respectively. Then, through the telescopic assembly and the two transfer assemblies, the sucked acidic chemical solution and deionized water are respectively extruded into the containers in the second lapping sleeve 39 and the fourth lapping sleeve 41, realizing the transfer of the acidic chemical solution. At the same time, the cleaning of the other conical pipette head 22 that does not suck the acidic chemical solution and the discharge of the mixed solution after cleaning are realized, preparing for its subsequent sucking of the alkaline chemical solution. Then, the two conical pipette heads 22 are removed from the two containers again by the lifting plate 3, and the container filled with the alkaline chemical solution is used to replace the container filled with the acidic chemical solution on the first lapping sleeve 38. Then, the controller drives the turntable 5 to rotate by 90 degrees continuously, and the lifting plate 3 drives the two conical pipette heads 22 to descend into the containers on the first lapping sleeve 38 and in the third lapping sleeve 40 to suck the alkaline chemical solution and the deionized water. Then, the controller drives the turntable 5 to rotate by 90 degrees, and cooperates with the two telescopic assemblies to realize the transfer of the alkaline chemical solution and the cleaning of the conical pipette head 22 that previously sucked the acidic chemical solution and the discharge of the mixed solution after cleaning. Thus, no matter which property of the chemical solution needs to be transferred, a clean conical pipette head 22 is provided for standby in this device, and the other one can be cleaned synchronously, which not only ensures the smooth implementation of the pipetting work in chemical engineering, improves the pipetting efficiency, but also prevents cross-contamination and damage caused by a single pipette head sucking chemical solutions with different properties.

[0063] After each cleaning of the conical pipette head 22 and squeezing the mixed solution after cleaning into the container on the fourth lapping sleeve 41, the third motor 24 is started through the controller, so that its output end rotates clockwise. Since its output end is fixedly connected to one of the hinge shafts, each synchronous pulley 28 is rotatably connected to a support plate through a hinge shaft, and the two synchronous pulleys 28 are sleeved by the synchronous belt 25. The slide plate 27 and the synchronous belt 25 are respectively fixedly connected to both ends of the traction block 26, and the slide plate 27 is slidably connected to the slide rail, so as to drive the blow pipe 6 on the top of the slide plate 27 to approach the conical pipette head 22 above the fourth lapping sleeve 41.

[0064] After the blow pipe 6 at the top of the skateboard 27 approaches the conical pipette tip 22 above the fourth lap joint sleeve 41, the fourth motor 29 is started through the controller, so as to drive the wedge-shaped rotating pipe 30 to rotate through its output end. Since the outer wall of the wedge-shaped rotating pipe 30 is in contact with the ball 31, one end of the second extrusion rod 33 is slidably connected to the limiting plate, and the other end is inserted into the air cylinder 34, thereby driving the extrusion rod to push towards the end close to the heating cylinder 35 inside the air cylinder 34. The pushed air flow enters the inside of the blow pipe 6 after being heated by the two electric heating plates 37 in the heating cylinder 35, and then is blown from the blow pipe 6 to the conical pipette tip 22 above the fourth lap joint sleeve 41, so that the residual deionized water adhered to the conical pipette tip 22 can be blown off, and at the same time, it has a drying effect, eliminating the need for manual wiping, accelerating the next chemical pipetting operation, and significantly improving the pipetting efficiency.

Claims

1. A pipetting device for chemical engineering, comprising a base and a vertical plate (1), the vertical plate (1) being fixedly arranged on the top of the base, characterized in that: It further comprises a backing plate (2), a rotating mechanism, a lifting mechanism and a cleaning mechanism; The backing plate (2) is fixedly arranged on the top of the base; The lifting mechanism is arranged on the top of the vertical plate (1). The lifting mechanism comprises a lifting plate (3) and a driving component. Three guide rails are fixedly arranged on the outer wall of the top of the vertical plate (1). The lifting plate (3) is slidably arranged between the three guide rails through three sliders (4), and the driving component is arranged on the outer wall of the vertical plate (1); The rotating mechanism is arranged on the lifting plate (3). The rotating mechanism comprises a turntable (5), an electric control component, a telescopic component and two transfer components. The turntable (5) is rotatably arranged at one end of the lifting plate (3) away from the vertical plate (1) through a rotating shaft. The electric control component is arranged on the top of the lifting plate (3). The telescopic component is arranged on the turntable (5), and the two transfer components are both arranged on the telescopic component; Each transfer component comprises a first extrusion rod (20), a sleeve (21), a conical pipetting head (22) and a sealing block (23). An installation frame is fixedly arranged at the bottom of the turntable (5). The sleeve (21) is fixedly arranged at one end of the installation frame. The first extrusion rod (20) is inserted on the sleeve (21), and the top end of the first extrusion rod (20) is fixedly connected to one end of the bottom of the U-shaped plate (18), and the first extrusion rod (20) is slidably connected to the turntable (5). A liquid through hole is formed at the bottom of the sleeve (21). The conical pipetting head (22) is fixedly arranged at the bottom of the liquid through hole. The sealing block (23) is sleeved on the outer wall of one end of the conical pipetting head (22) close to the sleeve (21); First overlapping sleeves (38), second overlapping sleeves (39), third overlapping sleeves (40) and fourth overlapping sleeves (41) are arranged at equal intervals on the top of the backing plate (2). The bottoms of the first overlapping sleeve (38), the second overlapping sleeve (39), the third overlapping sleeve (40) and the fourth overlapping sleeve (41) are all fixedly connected to the top of the backing plate (2). Four containers are respectively placed at the tops of the first overlapping sleeve (38), the second overlapping sleeve (39), the third overlapping sleeve (40) and the fourth overlapping sleeve (41). The container in the first overlapping sleeve (38) is used to hold chemical solutions to be pumped with different properties. The container in the second overlapping sleeve (39) is used to place the container to be transferred. The container in the third overlapping sleeve (40) is used to hold deionized water. The container in the fourth overlapping sleeve (41) is used to hold the mixture of deionized water and chemical solutions with different chemical properties after cleaning the conical pipetting head (22); The cleaning mechanism is arranged on the top of the base. The cleaning mechanism comprises a blowpipe (6), a sliding component and an extrusion component. The sliding component is arranged on the top of the base. The extrusion component is arranged on the sliding component. The blowpipe (6) is arranged on the sliding component.

2. The pipetting device for chemical engineering according to claim 1, characterized in that: The driving component includes a first motor (7), a lead screw (8), and two limit blocks (9). The two limit blocks (9) are both fixedly arranged on the outer wall of the vertical plate (1). The lead screw (8) is rotatably arranged between the two limit blocks (9). The first motor (7) is fixedly arranged on the top of one of the limit blocks (9), and its output end is fixedly connected to the top end of the lead screw (8). One of the sliders (4) close to the vertical plate (1) is threadedly connected to the lead screw (8).

3. The pipetting device for chemical engineering according to claim 2, characterized in that: The electric control component includes a second motor (10), a driving wheel (11), a driven wheel (12), and a belt (13). The second motor (10) is fixedly arranged on the top of the lifting plate (3). The driving wheel (11) is fixedly arranged on its output end. The driven wheel (12) is fixedly arranged on the top end of the rotating shaft. The belt (13) is sleeved between the driving wheel (11) and the driven wheel (12).

4. The pipetting device for chemical engineering according to claim 3, characterized in that: The telescopic component includes an electric push rod (14), a push block (15), a slide bar (16), a plug rod (17), and a U-shaped plate (18). A slideway is fixedly arranged on the top of the turntable (5). The slide bar (16) is slidably arranged inside the slideway. The plug rod (17) is fixedly arranged on the top of the slide bar (16), and the top of the plug rod (17) passes through the slideway. The push block (15) is fixedly arranged between the top end of the plug rod (17) and the output end of the electric push rod (14). The U-shaped plate (18) is fixedly arranged at the bottom of the slide bar (16).

5. A pipetting device for chemical engineering according to claim 4, characterized in that: A telescopic spring (19) is sleeved on the outer wall of the plug rod (17), and the inner wall of the slideway and the top of the slide bar (16) are respectively in contact with both ends of the telescopic spring (19).

6. The pipetting device for chemical engineering according to claim 5, characterized in that: The sliding component includes a third motor (24), a synchronous belt (25), a traction block (26), a sliding plate (27), and two synchronous wheels (28). A slide rail is fixedly arranged on the top of the base. The sliding plate (27) is slidably arranged on the top of the slide rail. Two support plates are fixedly arranged on the top of the base. Each synchronous wheel (28) is rotatably arranged on the top of one of the support plates through a hinge shaft. The synchronous belt (25) is sleeved between the two synchronous wheels (28). The third motor (24) is fixedly arranged on the outer wall of one of the support plates, and its output end is fixedly connected to the end of one of the hinge shafts. The traction block (26) is fixedly arranged between the sliding plate (27) and the synchronous belt (25).

7. The pipetting device for chemical engineering according to claim 6, characterized in that: The extrusion assembly includes a fourth motor (29), a wedge-shaped rotating tube (30), a ball (31), a return spring (32), a second extrusion rod (33), an air cylinder (34), and a heating cylinder (35). The fourth motor (29) is fixedly arranged at the top of the sliding plate (27), and the wedge-shaped rotating tube (30) is fixedly arranged at its output end. The air cylinder (34) is fixedly arranged at the top of the sliding plate (27). The second extrusion rod (33) is slidably arranged at the top of the sliding plate (27) through a limiting plate, and the second extrusion rod (33) is inserted into the air cylinder (34). A flange (36) is fixedly arranged at one end of the second extrusion rod (33) away from the air cylinder (34). The return spring (32) is sleeved on the outer wall of the second extrusion rod (33). The flange (36) and the limiting plate respectively abut against both ends of the return spring (32). The ball (31) is rotatably arranged on the outer wall of one end of the flange (36) away from the second extrusion rod (33). An air outlet is formed at one end of the air cylinder (34) away from the second extrusion rod (33). The heating cylinder (35) is fixedly arranged on the outer wall of the air outlet. Two electric heating plates (37) are fixedly arranged inside the heating cylinder (35). A ventilation hole is arranged at one end of the heating cylinder (35) away from the air cylinder (34). The outer wall of the wedge-shaped rotating tube (30) is in contact with the ball (31). The blow tube (6) is fixedly arranged on the outer wall of the ventilation hole.

8. A pipetting device for chemical engineering according to claim 7, characterized in that: Two guide rods (42) are fixedly arranged at the top of the turntable (5). The U-shaped plate (18) is slidably connected to both guide rods (42).

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