Multi-tube pipettor for microalgae preparation

Abstract

The invention discloses a multi-tube pipettor for microalgae preparation, and relates to the technical field of pipettes, the multi-tube pipettor comprises a shell, a plurality of pipettes, a negative pressure bin and a pull rod, the pipettes are arranged in the shell, a round hole is formed in the bottom of the shell, the negative pressure bin is installed on the upper portion of the interior of the shell, the pull rod is installed on the top of the shell, and the pull rod is installed on the bottom of the shell. The bottom of the pull rod is located in the negative pressure bin, a piston plate is movably installed in the negative pressure bin, inner pipes are fixedly installed at the positions, corresponding to the pipettes, of the bottom of the negative pressure bin, piston blocks are fixedly installed at the bottoms of the inner pipes, sealing rings are connected to the piston blocks in a sleeving mode, and an installation mechanism and a cleaning mechanism are arranged in the shell. The effect of automatically cleaning residual water outside the transfer pipette when the transfer pipette is withdrawn is achieved, meanwhile, water can be squeezed out of the cleaned sponge ring, and the steps needed for cleaning the transfer pipette are reduced while the cleaning effect on the transfer pipette is improved.

Description

Technical Field

[0001] The invention relates to the technical field of pipettes, in particular to a multi-tube pipette for preparing microalgae. Background Art

[0002] A multitube pipette is a laboratory instrument used to accurately measure and dispense liquids. It can process multiple samples at the same time or transfer the same volume of liquid in multiple reaction vessels. When preparing microalgae, a multitube pipette is needed to pipette the culture medium.

[0003] After searching the Chinese patent with the publication number CN220803342U, a multi-channel pipette is disclosed, including a mounting shell, wherein the interior of the mounting shell is respectively provided with a negative pressure cavity and four liquid storage cavities, a mounting cover is fixedly installed on the lower surface of the mounting shell, and four suction nozzles are arranged inside the mounting cover, and a tube cavity is opened inside the shell of the mounting cover, and the inner bottom wall of the four liquid storage cavities is provided with four connecting pipes respectively connected with the four suction nozzles, and the inner top wall of the negative pressure cavity is embedded with a mounting frame, and an electric push rod is fixedly installed inside the mounting frame. The patent sets a suction nozzle, a liquid storage cavity and an electric push rod, and the contraction of the electric push rod drives the piston to move up in the negative pressure cavity, and the upward movement of the piston makes the four liquid storage cavities negatively pressurized through the vent hole, and the negative pressure liquid storage cavity sucks the external liquid into the liquid storage cavity through the connecting pipe and the suction nozzle, so that the pipette can achieve the purpose of extracting and pipetting multiple liquids at the same time, thereby improving the pipetting efficiency of the pipette.

[0004] However, the above invention has the following disadvantages: Although the above technology achieves the purpose of extracting and pipetting multiple liquids at the same time, when cleaning the pipette after use, it is generally done by extracting clean water to clean the inside of the pipette. During extraction, the pipette of the pipette will be inserted into the clean water, and a certain amount of water will remain on the outer wall of the pipette after cleaning. In order to improve the cleaning effect, the water on the outer wall needs to be cleaned again. If the cleaning is forgotten, the residual water will easily damage the inside of the instrument and affect the use of the instrument. Summary of the invention

[0005] The object of the present invention is to provide a multi-tube pipette for preparing microalgae to solve the problems raised in the above background technology.

[0006] The technical solution of the present invention is: a multi-tube pipette for preparing microalgae, comprising a shell, a pipette, a negative pressure chamber and a pull rod, a total of a plurality of pipettes, the pipettes are arranged inside the shell, a circular hole is opened at the bottom of the shell, the negative pressure chamber is installed above the inside of the shell, the pull rod is installed on the top of the shell, the bottom of the pull rod is located inside the negative pressure chamber, a piston plate is movably installed inside the negative pressure chamber, an inner tube is fixedly installed at the bottom of the negative pressure chamber corresponding to the position of each pipette, a piston block is fixedly installed at the bottom of the inner tube, a sealing ring is sleeved on the piston block, a first mounting block is fixedly sleeved on a plurality of pipettes, and a mounting mechanism and a cleaning mechanism are arranged inside the shell; Cleaning agencies include: Sponge rings, the number of which is the same as the number of pipettes, the sponge rings are movably mounted inside the circular holes on the shell corresponding to the pipettes, a plurality of drainage holes are provided inside the sponge rings, and a drainage port is provided on the bottom wall of the shell at positions corresponding to the drainage holes; A transmission block and a pressure rod, wherein the transmission block is a rectangular block with an inclined surface, and there are two transmission blocks and two pressure rods, and the two transmission blocks are symmetrically arranged on the upper part of the inner part of the shell, and the pressure rod is a rectangular long rod with an inclined surface on the top, and the two pressure rods are respectively arranged below the two pressure rods; The number of the pressure rings and the pressure plate is consistent with that of the sponge rings. The pressure rings are movably installed inside the shell at positions corresponding to the sponge rings. The pressure plate is fixedly installed on the tops of the plurality of pressure rings. The pressure plate is fixedly connected to the pressure rod.

[0007] Preferably, the mounting mechanism includes a connecting block, a shift block, a first magnetic block and a second magnetic block. The number of the connecting blocks, the shift blocks and the second magnetic blocks is consistent with the number of the pipettes. A plurality of adjustment grooves are provided on the side wall of the shell at positions corresponding to the first mounting blocks. The connecting block is located inside the connecting block. The plurality of shift blocks are respectively fixedly mounted on the plurality of connecting blocks. There are a plurality of groups of first magnetic blocks. The plurality of groups of first magnetic blocks are respectively inlaid and mounted inside the plurality of adjustment grooves. The second magnetic block is inlaid and mounted on the connecting block, and the pole of the second magnetic block close to that of the first magnetic block is an opposite pole.

[0008] Preferably, a plurality of first springs are movably installed between the pressure ring and the bottom wall surface inside the shell, the pressure ring is movably installed inside the shell through the first springs, a first installation groove is opened on the inner wall of the shell corresponding to the position of the transmission block, the transmission block is movably installed inside the first installation groove, a reset plate is fixedly installed on the bottom of the transmission block, the reset plate is a block with a rectangular structure, and a second spring is movably connected between the reset plate and the shell.

[0009] Preferably, an air injection pipe is fixedly installed on the side wall of the negative pressure chamber, one end of the air injection pipe passes through the side wall of the shell and is located outside the shell, and a sealing cover is movably installed on the air injection pipe through a thread.

[0010] Preferably, the pull rod includes a first piston rod, a second piston rod, a third piston rod and a connecting shaft. The first piston rod, the second piston rod and the third piston rod are all rectangular structures. The second piston rod is arranged between the first piston rod and the third piston rod. There are two connecting shafts in total. The two connecting shafts are movably installed at the upper and lower ends of the second piston rod respectively. The first piston rod and the third piston rod are movably sleeved on the two connecting shafts respectively, and the bottom of the first piston rod is fixedly connected to the piston plate.

[0011] Preferably, a handle is provided above the shell, the pull rod is located inside the handle, a fixing mechanism is provided between the shell and the handle, the fixing mechanism includes a positioning block, a clamping block, a third spring, a push block, a third magnetic block and a fourth magnetic block, the positioning block is fixedly installed on the top of the shell, the positioning block penetrates the bottom wall of the handle upward, the clamping block is movably installed inside the positioning block, the third spring is movably installed inside the positioning block and connected to the clamping block, and the push block is movably installed at a position on the handle corresponding to the clamping block.

[0012] Preferably, the third magnetic block is mounted on the side wall of the handle, the fourth magnetic block is mounted on the side wall of the shell, and the adjacent poles of the third magnetic block and the fourth magnetic block are opposite poles.

[0013] Preferably, a baffle is movably installed at the bottom of the shell, a second installation groove is opened in the middle position of the bottom of the shell, the baffle is movably installed on the second installation groove, and fifth magnetic blocks are installed on both sides of the inside of the second installation groove and on the baffle, and the fifth magnetic block on the baffle has an opposite pole to the fifth magnetic block inside the second installation groove.

[0014] Preferably, the pipette is provided with scale lines, and two slide grooves are provided on the outer wall of the shell at positions corresponding to the adjustment grooves, and two push plates are movably installed between the two slide grooves, and the two push plates are respectively located at the upper and lower ends of the slide grooves.

[0015] Preferably, a second mounting block is embedded and installed inside the shell at a position corresponding to the first piston rod, a stop block is movably installed inside the second mounting block, an adjusting screw is movably installed inside the second mounting block, one end of the adjusting screw is located inside the stop block and is threadedly connected to the stop block.

[0016] The present invention provides a multi-tube pipette for preparing microalgae through improvement, which has the following improvements and advantages compared with the prior art: First, the present invention is provided with a cleaning mechanism. When the pipette is used, the pipette is inserted into clean water, and the pipette can be cleaned by extracting clean water. Then the pipette can be retracted into the shell. When the pipette moves toward the inside of the shell, the sponge ring can wipe and clean the water remaining on the outer wall of the pipette, and the drainage hole can store the water left by the clean pipette. When the pipette moves upward inside the shell, the first mounting block will squeeze the transmission block as the pipette moves. After being squeezed, the two transmission blocks will move away from each other, thereby pressing the pressure rod. The pressure rod is squeezed and moves downward, thereby driving the pressure plate and the pressure ring to move downward. The downward movement of the pressure ring can squeeze the sponge ring. At this time, the water left inside the sponge ring due to cleaning the pipette will be squeezed. After the sponge ring is squeezed, the water inside the drainage hole can be discharged from the shell through the drainage port, thereby achieving the effect of automatically cleaning the residual water outside the pipette when the pipette is retracted. At the same time, the cleaned sponge ring can also be squeezed for water, which improves the cleaning effect of the pipette and reduces the steps required for cleaning the pipette.

[0017] Second: In the present invention, the first mounting block and the pipette can be installed inside the shell by adsorbing the second magnetic block and the first magnetic block together, and the shift block can be moved downward to drive the connecting block, the first mounting block and the pipette to move, so that the pipette can be moved out from the inside of the shell, or the pipette can be retracted into the shell after use. At the same time, each pipette is controlled individually, and the corresponding number of pipettes can be selected according to the number of samples to be pipetted, which is convenient for use.

[0018] Third: In the present invention, the handle can be fixedly installed on the shell by a fixing mechanism, and the block limits the handle. At this time, the handle will be fixed on the shell. When the device is not in use, the third magnetic block can be pressed, and the third magnetic block will move toward the inside of the handle, and then the block can be squeezed. After being squeezed, the block will move to the inside of the positioning block. At this time, the handle loses the force of being limited by the block, and the handle will be separated from the shell. The handle is moved upward, so that the first piston rod and the second piston rod leave the inside of the handle. At this time, the handle can be flipped toward one side of the shell, and the second piston rod and the third piston rod will also flip. When flipped until the third magnetic block and the fourth magnetic block are adsorbed together, the handle will be folded and fixed on the shell, and the pipette will also be stored in the inside of the shell, thereby achieving the effect of easy storage.

[0019] Fourthly, in the present invention, when the amount of culture fluid transferred through the pipette is small, the adjusting screw can be rotated, and the adjusting screw will drive the stop block to move inside the second mounting block. After the stop block contacts the first piston rod, when the first piston rod is pulled, the friction between the stop block and the first piston rod will increase the resistance to pulling the first piston rod. At this time, when the same force is used to pull the first piston rod, the distance moved by the first piston rod will become smaller, thereby reducing the amount of culture fluid absorbed. Thus, the amount of culture fluid inhaled can be accurately controlled when a small amount of culture fluid is absorbed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a front schematic diagram of the overall structure of the present invention; Figure 2 It is a front cross-sectional view of the internal structure of the shell in the present invention; Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 4 For the present invention Figure 2 Enlarged view of point B in the middle; Figure 5 It is a schematic diagram of the side cutaway structure of the present invention; Figure 6 For the present invention Figure 5 Enlarged view of point C in the middle; Figure 7 It is a schematic diagram of the back side of the overall structure of the present invention; Figure 8 For the present invention Figure 2 Enlarged view of point D in the middle; Fig. 9 It is a schematic diagram of the overall structure of the present invention in a folded state.

[0022] Reference numerals: 1. Shell; 2. Pipette; 3. Negative pressure chamber; 4. Handle; 5. Tie rod assembly; 6. Piston plate; 7. Inner tube; 8. Piston block; 9. Sealing ring; 10. Sponge ring; 11. First mounting block; 12. Transmission block; 13. Pressing rod; 14. Pressing ring; 15. Pressing plate; 16. Drain hole; 17. Drain port; 18. First spring; 19. First mounting groove; 20. Reset plate; 21. Second spring; 22. Gas injection pipe; 23. Sealing cover; 24. First piston rod; 25. The second piston rod; 26, the third piston rod; 27, the connecting shaft; 28, the adjusting groove; 29, the connecting block; 30, the shifting block; 31, the first magnetic block; 32, the second magnetic block; 33, the sliding groove; 34, the pushing plate; 35, the scale line; 36, the second mounting block; 37, the resisting block; 38, the adjusting screw; 39, the positioning block; 40, the clamping block; 41, the third spring; 42, the pushing block; 43, the third magnetic block; 44, the fourth magnetic block; 45, the baffle; 46, the second mounting groove; 47, the fifth magnetic block. DETAILED DESCRIPTION

[0023] The present invention is described in detail below, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The present invention provides a multi-tube pipette for preparing microalgae through improvement. The technical solution of the present invention is: like Figures 1 to 9As shown, an embodiment of the present invention provides a multi-tube pipette for preparing microalgae, including a shell 1, a pipette 2, a negative pressure chamber 3 and a pull rod assembly 5. The shell 1 is a hollow structure. There are a plurality of pipettes 2. The plurality of pipettes 2 are evenly distributed inside the shell 1. A circular hole corresponding to the pipette 2 is opened at the bottom of the shell 1. The pipette 2 can be moved to the outside of the shell 1 through the circular hole. The negative pressure chamber 3 is a hollow rectangular structure. The negative pressure chamber 3 is fixedly installed above the inside of the shell 1. The pull rod assembly 5 is movably installed on the top of the shell 1. The bottom of the pull rod assembly 5 is located inside the negative pressure chamber 3. A piston plate 6 is movably installed inside the negative pressure chamber 3. The piston plate 6 is fixedly connected to the pull rod assembly 5. The bottom of the negative pressure chamber 3 corresponds to each pipette. The position of the liquid tube 2 is fixedly installed with an inner tube 7, which is a cylindrical tube. The inner tube 7 is located inside the pipette 2. A piston block 8 is fixedly installed at the bottom of the inner tube 7. A sealing ring 9 is sleeved on the piston block 8. The sealing ring 9 has an interference fit with the inner wall of the pipette 2. By pulling the pull rod assembly 5, the pull rod assembly 5 drives the piston plate 6 to move inside the negative pressure chamber 3 to generate negative pressure inside the negative pressure chamber 3, and then it can be transmitted to the inside of the pipette 2 through the inner tube 7. At this time, the pipette 2 can suck in the culture solution containing microalgae, and then the pipetting operation can be performed. A first mounting block 11 is fixedly sleeved on multiple pipettes 2. The first mounting block 11 is a rectangular structure block. The inside of the housing 1 is provided with a mounting mechanism and a cleaning mechanism; The cleaning mechanism includes a sponge ring 10, a transmission block 12, a pressure rod 13, a pressure ring 14 and a pressure plate 15. The sponge ring 10 is a circular ring structure. The number of sponge rings 10 is consistent with the number of pipettes 2. The sponge ring 10 is embedded and movably installed in the circular hole corresponding to the pipette 2 on the shell 1. When the pipette 2 is used, the pipette 2 is inserted into clean water. The pipette 2 can be cleaned by extracting clean water, and then the pipette 2 can be retracted into the interior of the shell 1. When the pipette 2 moves toward the interior of the shell 1, the sponge ring 10 can move the pipette 2 to the inside of the shell 1. The residual water on the outer wall of the liquid pipe 2 is wiped clean, the transmission block 12 is a rectangular block with an inclined surface, there are two transmission blocks 12 and pressure rods 13, the two transmission blocks 12 are symmetrically arranged above the inside of the shell 1, the pressure rod 13 is a rectangular long rod with an inclined surface on the top, and the two pressure rods 13 are respectively arranged below the two pressure rods 13, the pressure ring 14 is a circular ring structure, the number of the pressure rings 14 is consistent with the sponge ring 10, the pressure ring 14 is movably installed in the position of the sponge ring 10 inside the shell 1, the bottom of the pressure ring 14 is in contact with the top of the sponge ring 10, and the pressure plate 15 is a rectangular plate, the pressing plate 15 is fixedly installed on the top of the plurality of pressing rings 14, the pressing rod 13 is fixedly connected to the pressing plate 15, and a circular hole corresponding to the pipette 2 is opened on the pressing plate 15 for passing the pipette 2, a plurality of drainage holes 16 are opened inside the sponge ring 10, the drainage holes 16 are circular holes, and the drainage holes 16 can store the water left by the cleaning pipette 2, and a drainage port 17 is opened at the position corresponding to the drainage hole 16 on the bottom wall of the housing 1, and the drainage port 17 is a circular structure. When the pipette 2 moves upward inside the housing 1, the first installation The block 11 will squeeze the transmission block 12 as the pipette 2 moves. The two transmission blocks 12 will move away from each other after being squeezed, and then squeeze the pressure rod 13. The pressure rod 13 will move downward after being squeezed, thereby driving the pressure plate 15 and the pressure ring 14 to move downward. The downward movement of the pressure ring 14 can squeeze the sponge ring 10. At this time, the water left inside the sponge ring 10 due to cleaning the pipette 2 will be squeezed. After the sponge ring 10 is squeezed, the water inside the drainage hole 16 can be discharged from the inside of the housing 1 through the drainage port 17; The mounting mechanism includes a connecting block 29, a shifting block 30, a first magnetic block 31 and a second magnetic block 32. The connecting block 29 is a rectangular block. The number of the connecting blocks 29, the shifting blocks 30 and the second magnetic blocks 32 is consistent with the number of the pipettes 2. A plurality of adjusting grooves 28 are provided on the side wall of the housing 1 at positions corresponding to the first mounting block 11. The adjusting grooves 28 are rectangular grooves. The connecting block 29 is located inside the connecting block 29. The shifting block 30 is a rectangular block. The plurality of shifting blocks 30 are respectively fixedly mounted on the plurality of connecting blocks 29. There are a plurality of groups of first magnetic blocks 31. The plurality of groups of first magnetic blocks 31 are respectively inlaid and mounted inside the plurality of adjusting grooves 28. The second magnetic blocks 31 are respectively fixedly mounted on the plurality of connecting blocks 29. The first magnetic block 32 is embedded and installed on the connecting block 29, and the second magnetic block 32 is opposite to the first magnetic block 31 in one pole. The first mounting block 11 and the pipette 2 can be installed inside the housing 1 by adsorbing the second magnetic block 32 and the first magnetic block 31 together. The shifting block 30 is moved downward, and the shifting block 30 can drive the connecting block 29, the first mounting block 11 and the pipette 2 to move, so that the pipette 2 can be moved out of the housing 1, or the pipette 2 can be put back into the housing 1 after use. At the same time, each pipette 2 is controlled separately, and the number of corresponding pipettes 2 can be selected according to the number of samples to be pipetted, which is convenient for use; A plurality of first springs 18 are movably installed between the pressure ring 14 and the bottom wall surface inside the shell 1. The pressure ring 14 is movably installed inside the shell 1 through the first springs 18. The pressure ring 14 can squeeze the first springs 18 when it moves. When the first mounting block 11 is separated from the transmission block 12, the first springs 18 will release elastic force to drive the pressure ring 14 to reset, so that the sponge ring 10 can restore its shape for easy cleaning next time. A first mounting groove 19 is provided on the inner wall of the shell 1 corresponding to the position of the transmission block 12. The first mounting groove 19 is a groove of a rectangular structure. The transmission block 12 is movably installed inside the first mounting groove 19. A reset plate 20 is fixedly installed at the bottom of the transmission block 12. The reset plate 20 is a block of a rectangular structure. A second spring 21 is movably connected between the reset plate 20 and the shell 1. The second spring 21 can reset the transmission block 12 after being squeezed.

[0025] An air injection pipe 22 is fixedly installed on the side wall of the negative pressure chamber 3. The air injection pipe 22 is a circular tube. One end of the air injection pipe 22 passes through the side wall of the shell 1 and is located outside the shell 1. A sealing cover 23 is movably installed on the air injection pipe 22 through a thread. After the inside of the pipette 2 is cleaned, water may still remain inside the pipette 2. At this time, the sealing cover 23 can be removed from the air injection pipe 22, and then air can be blown into the inside of the negative pressure chamber 3 through the air injection pipe 22, so that the residual water in the pipette 2 can be blown out from the bottom of the pipette 2 through the airflow.

[0026] The pull rod assembly 5 includes a first piston rod 24, a second piston rod 25, a third piston rod 26 and a connecting shaft 27. The first piston rod 24, the second piston rod 25 and the third piston rod 26 are all rectangular structures. The second piston rod 25 is arranged between the first piston rod 24 and the third piston rod 26. There are two connecting shafts 27. The two connecting shafts 27 are movably installed at the upper and lower ends of the second piston rod 25 respectively. The first piston rod 24 and the third piston rod 26 are movably sleeved on the two connecting shafts 27 respectively. The bottom of the first piston rod 24 is fixedly connected to the piston plate 6. Through the arrangement of the connecting shaft 27, the first piston rod 24, The second piston rod 25 and the third piston rod 26 can be flipped with the connecting shaft 27 as the base point. A handle 4 is arranged above the shell 1. The handle 4 is a hollow rectangular structure. The pull rod assembly 5 is located inside the handle 4. A fixing mechanism is arranged between the shell 1 and the handle 4. The fixing mechanism includes a positioning block 39, a clamping block 40, a third spring 41, a push block 42, a third magnetic block 43 and a fourth magnetic block 44. The positioning block 39 is a block with a hollow rectangular structure. The positioning block 39 is fixedly installed on the top of the shell 1. The positioning block 39 passes through the bottom wall of the handle 4 upward. The clamping block 40 is a block with a trapezoidal structure. The clamping block 40 is movably installed on the positioning block 39. Inside, a third spring 41 is movably mounted inside the positioning block 39 and connected to the card block 40, a push block 42 is movably mounted on the handle 4 at a position corresponding to the card block 40, a third magnetic block 43 is embedded on the side wall of the handle 4, and a fourth magnetic block 44 is embedded on the side wall of the shell 1, and the third magnetic block 43 and the fourth magnetic block 44 are close to each other. The poles are opposite, and the handle 4 can be fixed on the shell 1 through a fixing mechanism, and the card block 40 limits the handle 4. At this time, the handle 4 will be fixed on the shell 1. When the device is not in use, the third magnetic block 43 can be pressed, and the third magnetic block 43 will move toward the inside of the handle 4, thereby pressing the card block 4 0 is squeezed, and the block 40 is squeezed and moves to the inside of the positioning block 39. At this time, the handle 4 loses the force of being limited by the block 40, and the handle 4 is separated from the shell 1. The handle 4 is moved upward, so that the first piston rod 24 and the second piston rod 25 leave from the inside of the handle 4. At this time, the handle 4 can be turned toward one side of the shell 1, and the second piston rod 25 and the third piston rod 26 will also turn. When the third magnetic block 43 and the fourth magnetic block 44 are turned over, the handle 4 will be folded and fixed on the shell 1, and the pipette 2 will also be stored in the inside of the shell 1, thereby achieving the effect of easy storage; A baffle 45 is movably installed at the bottom of the shell 1. The baffle 45 is a plate with a rectangular structure. A second mounting groove 46 is opened in the middle position of the bottom of the shell 1. The second mounting groove 46 is a groove with a rectangular structure. The baffle 45 is movably installed on the second mounting groove 46. Fifth magnetic blocks 47 are installed on both sides of the inside of the second mounting groove 46 and on the baffle 45. The fifth magnetic block 47 on the baffle 45 is opposite to the pole of the fifth magnetic block 47 inside the second mounting groove 46. The baffle 45 can move at the bottom of the shell 1. The baffle 45 seals the circular hole at the bottom of the shell 1. When the pipette 2 needs to be used, the baffle 45 can be slid to open the circular hole inside the shell 1, and the pipette 2 can extend out of the shell 1. When not in use, the baffle 45 can seal the circular hole.

[0027] A scale line 35 is provided on the pipette 2, which is convenient for observing the amount of culture fluid sucked into the pipette 2. Two slide grooves 33 are provided on the outer wall of the shell 1 at the position corresponding to the adjustment groove 28. Two push plates 34 are movably installed between the two slide grooves 33. The push plate 34 is a rectangular plate. The two push plates 34 are respectively located at the upper and lower ends of the slide groove 33. The push plate 34 can move on the shell 1 through the slide groove 33. Pushing the slide groove 33 can squeeze multiple dial blocks 30 at the same time, so that multiple pipettes 2 can be moved out of the shell 1 at one time, or multiple pipettes 2 can be retracted into the shell 1 at the same time.

[0028] A second mounting block 36 is inlaid and installed in the position corresponding to the first piston rod 24 inside the shell 1, and a stop block 37 is movably installed inside the second mounting block 36. The stop block 37 is a block with a rectangular structure, and an adjusting screw 38 is movably installed inside the second mounting block 36. One end of the adjusting screw 38 is located inside the stop block 37 and is threadedly connected to the stop block 37. When the amount of culture fluid pipetted through the pipette 2 is small, the adjusting screw 38 can be rotated, and the adjusting screw 38 will drive the stop block 37 to move inside the second mounting block 36. After the stop block 37 contacts the first piston rod 24, when the first piston rod 24 is pulled again, the friction between the stop block 37 and the first piston rod 24 will increase the resistance to pulling the first piston rod 24. At this time, the same force is used to pull the first piston rod 24, and the distance moved by the first piston rod 24 will become smaller, thereby reducing the amount of culture fluid absorbed, so that the amount of culture fluid absorbed can be accurately controlled when less culture fluid is absorbed.

[0029] Specific implementation steps: by pulling the pull rod assembly 5, the pull rod assembly 5 drives the piston plate 6 to move inside the negative pressure chamber 3 to generate negative pressure inside the negative pressure chamber 3, and then it can be transmitted to the inside of the pipette 2 through the inner tube 7. At this time, the pipette 2 can suck in the culture solution containing microalgae, and then the pipetting operation can be performed; By providing a cleaning mechanism, when the pipette 2 is used, the pipette 2 is inserted into clean water, and the pipette 2 can be cleaned by extracting clean water, and then the pipette 2 can be retracted into the shell 1. When the pipette 2 moves toward the inside of the shell 1, the sponge ring 10 can wipe and clean the water remaining on the outer wall of the pipette 2, and the drainage hole 16 can store the water left by the clean pipette 2. When the pipette 2 moves upward inside the shell 1, the first mounting block 11 will squeeze the transmission block 12 as the pipette 2 moves. After being squeezed, the two transmission blocks 12 will move away from each other, and then the pressure rod 13 can be squeezed. When the pressure rod 13 is squeezed, it will move downward, thereby driving the pressure plate 15 and the pressure ring 14 to move downward. The downward movement of the pressure ring 14 can squeeze the sponge ring 10. At this time, the water left inside the sponge ring 10 due to cleaning the pipette 2 will be squeezed. After the sponge ring 10 is squeezed, the water inside the drainage hole 16 can be discharged from the inside of the shell 1 through the drainage port 17, thereby achieving the effect of automatically cleaning the water remaining outside the pipette 2 when the pipette 2 is retracted. At the same time, the cleaned sponge ring 10 can also be squeezed for water, which improves the cleaning effect of the pipette 2 while reducing the steps required for cleaning the pipette 2.

[0030] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multi-tube pipette for preparing microalgae, comprising a housing (1), a pipette (2), a negative pressure chamber (3) and a tie rod assembly (5), wherein there are a plurality of pipettes (2), the pipettes (2) are arranged inside the housing (1), a circular hole is opened at the bottom of the housing (1), the negative pressure chamber (3) is installed above the inside of the housing (1), the tie rod assembly (5) is installed at the top of the housing (1), and the bottom of the tie rod assembly (5) is located inside the negative pressure chamber (3), characterized in that: A piston plate (6) is movably mounted inside the negative pressure chamber (3); an inner tube (7) is fixedly mounted at the bottom of the negative pressure chamber (3) at a position corresponding to each pipette (2); a piston block (8) is fixedly mounted at the bottom of the inner tube (7); a sealing ring (9) is sleeved on the piston block (8); a first mounting block (11) is fixedly sleeved on each of the plurality of pipettes (2); and a mounting mechanism and a cleaning mechanism are arranged inside the housing (1); Cleaning agencies include: A sponge ring (10), wherein the number of the sponge rings (10) is the same as the number of the pipettes (2), the sponge ring (10) is movably mounted inside a circular hole on the housing (1) corresponding to the pipette (2), a plurality of drainage holes (16) are formed inside the sponge ring (10), and a drainage port (17) is formed on the bottom wall of the housing (1) at a position corresponding to the drainage hole (16); A transmission block (12) and a pressure rod (13), wherein the transmission block (12) is a rectangular block with an inclined surface, and there are two transmission blocks (12) and two pressure rods (13), and the two transmission blocks (12) are symmetrically arranged above the inside of the housing (1), and the pressure rod (13) is a rectangular long rod with an inclined surface at the top, and the two pressure rods (13) are respectively arranged below the two pressure rods (13); A pressure ring (14) and a pressure plate (15), wherein the number of the pressure rings (14) is the same as the number of the sponge rings (10), the pressure ring (14) is movably mounted inside the housing (1) at a position corresponding to the sponge ring (10), the pressure plate (15) is fixedly mounted on the top of the plurality of pressure rings (14), and the pressure plate (15) is fixedly connected to the pressure rod (13).

2. A multi-tube pipette for preparing microalgae according to claim 1, characterized in that: The mounting mechanism comprises a connecting block (29), a shifting block (30), a first magnetic block (31) and a second magnetic block (32). The number of the connecting blocks (29), the shifting block (30) and the second magnetic block (32) is the same as the number of the pipette (2). A plurality of adjustment slots (28) are provided on the side wall of the housing (1) at positions corresponding to the first mounting block (11). The connecting block (29) is located inside the connecting block (29). The plurality of shifting blocks (30) are respectively fixedly mounted on the plurality of connecting blocks (29). There are a plurality of groups of first magnetic blocks (31). The plurality of groups of first magnetic blocks (31) are respectively embedded and mounted inside the plurality of adjustment slots (28). The second magnetic block (32) is embedded and mounted on the connecting block (29). The second magnetic block (32) has a pole close to that of the first magnetic block (31) and has an opposite pole.

3. A multi-tube pipette for preparing microalgae according to claim 1, characterized in that: A plurality of first springs (18) are movably mounted between the pressure ring (14) and the bottom wall surface inside the housing (1); the pressure ring (14) is movably mounted inside the housing (1) via the first springs (18); a first mounting groove (19) is provided on the inner wall of the housing (1) at a position corresponding to the transmission block (12); the transmission block (12) is movably mounted inside the first mounting groove (19); a reset plate (20) is fixedly mounted on the bottom of the transmission block (12); the reset plate (20) is a rectangular block; and a second spring (21) is movably connected between the reset plate (20) and the housing (1).

4. A multi-tube pipette for preparing microalgae according to claim 1, characterized in that: An air injection pipe (22) is fixedly mounted on the side wall of the negative pressure chamber (3); one end of the air injection pipe (22) passes through the side wall of the shell (1) and is located outside the shell (1); a sealing cover (23) is movably mounted on the air injection pipe (22) via a thread.

5. A multi-tube pipette for preparing microalgae according to claim 1, characterized in that: The pull rod assembly (5) comprises a first piston rod (24), a second piston rod (25), a third piston rod (26) and a connecting shaft (27). The first piston rod (24), the second piston rod (25) and the third piston rod (26) are all rectangular structures. The second piston rod (25) is arranged between the first piston rod (24) and the third piston rod (26). There are two connecting shafts (27). The two connecting shafts (27) are movably mounted on the upper and lower ends of the second piston rod (25), respectively. The first piston rod (24) and the third piston rod (26) are movably sleeved on the two connecting shafts (27), respectively. The bottom of the first piston rod (24) is fixedly connected to the piston plate (6).

6. A multi-tube pipette for preparing microalgae according to claim 1, characterized in that: A handle (4) is arranged above the shell (1), the pull rod assembly (5) is located inside the handle (4), a fixing mechanism is arranged between the shell (1) and the handle (4), the fixing mechanism comprising a positioning block (39), a clamping block (40), a third spring (41), a push block (42), a third magnetic block (43) and a fourth magnetic block (44), the positioning block (39) is fixedly mounted on the top of the shell (1), the positioning block (39) penetrates upward through the bottom wall of the handle (4), the clamping block (40) is movably mounted inside the positioning block (39), the third spring (41) is movably mounted inside the positioning block (39) and connected to the clamping block (40), and the push block (42) is movably mounted on the handle (4) at a position corresponding to the clamping block (40).

7. A multi-tube pipette for preparing microalgae according to claim 6, characterized in that: The third magnetic block (43) is mounted on the side wall of the handle (4), and the fourth magnetic block (44) is mounted on the side wall of the housing (1). The adjacent poles of the third magnetic block (43) and the fourth magnetic block (44) are opposite poles.

8. A multi-tube pipette for preparing microalgae according to claim 1, characterized in that: A baffle (45) is movably mounted on the bottom of the shell (1); a second mounting groove (46) is provided in the middle of the bottom of the shell (1); the baffle (45) is movably mounted on the second mounting groove (46); fifth magnetic blocks (47) are mounted on both sides of the inside of the second mounting groove (46) and on the baffle (45); the fifth magnetic block (47) on the baffle (45) has a pole that is opposite to the pole of the fifth magnetic block (47) in the second mounting groove (46).

9. A multi-tube pipette for preparing microalgae according to claim 1, characterized in that: The pipette (2) is provided with a scale line (35), and two slide grooves (33) are provided on the outer wall of the housing (1) at positions corresponding to the adjustment groove (28), and two push plates (34) are movably installed between the two slide grooves (33), and the two push plates (34) are respectively located at the upper and lower ends of the slide groove (33).

10. A multi-tube pipette for preparing microalgae according to claim 1, characterized in that: A second mounting block (36) is embedded and installed in a position corresponding to the first piston rod (24) inside the housing (1); a stop block (37) is movably installed inside the second mounting block (36); an adjusting screw (38) is movably installed inside the second mounting block (36); one end of the adjusting screw (38) is located inside the stop block (37) and is threadedly connected to the stop block (37).

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