Rapid quantitative pipettor

Abstract

The invention discloses a rapid quantitative pipettor which comprises a quantitative tube, a liquid outlet mechanism is arranged on the quantitative tube, a micro water pump is arranged at the bottom of the inner side of the quantitative tube, a control switch is arranged on the outer side of the quantitative tube and electrically connected with the micro water pump, and a connecting nozzle is fixedly connected to the bottom of the quantitative tube. A water inlet pipe is fixedly connected to the bottom of the connecting nozzle, a backflow preventing mechanism is arranged on the inner side of the connecting nozzle, a quantitative adjusting mechanism is arranged on the upper portion of the inner side of the quantitative pipe, a piston is slidably connected to the middle of the inner side of the quantitative pipe, and a backing ring is fixedly connected to the position, below the piston, of the middle of the inner side of the quantitative pipe; the invention relates to a rapid quantitative pipettor, which has the characteristic that the pipetting amount and the liquid outlet direction can be adjusted.

Description

Technical Field

[0001] The invention belongs to the technical field of pipettes, in particular to a rapid quantitative pipette. Background Art

[0002] A pipette, also known as a pipette gun, is an instrument used to transfer liquids in a quantitative manner.

[0003] After searching, in the invention application patent with application publication number CN115739223A, a pipette and a pipette are disclosed, wherein the pipette comprises: a barrel having a first accommodating cavity inside, the barrel having a first opening and a second opening connecting the first accommodating cavity with the external environment; a hollow guide rod at least partially located in the first accommodating cavity, the hollow guide rod having a second accommodating cavity; the hollow guide rod having a third opening connecting the second accommodating cavity with the first accommodating cavity and a fourth opening connecting the second accommodating cavity.

[0004] The existing pipette has a relatively fixed internal space, so the amount of liquid transfer is also relatively fixed and cannot be adjusted as required, and the direction of liquid discharge is also fixed, which is inconvenient to use. Therefore, it is necessary to design a rapid quantitative pipette. Summary of the invention The purpose of the present invention is to provide a rapid quantitative pipette to solve the above problems, thereby solving the problems mentioned in the background technology.

[0006] In order to solve the above problems, the present invention provides a technical solution: A rapid quantitative pipette comprises a quantitative tube, wherein a liquid discharge mechanism is arranged on the quantitative tube, a micro water pump is arranged at the inner bottom of the quantitative tube, a control switch is arranged at the outer side of the quantitative tube, and the control switch is electrically connected to the micro water pump, a connecting nozzle is fixedly connected to the bottom of the quantitative tube, a water inlet pipe is fixedly connected to the bottom of the connecting nozzle, a backflow prevention mechanism is arranged on the inner side of the connecting nozzle, a quantitative adjustment mechanism is arranged on the inner upper part of the quantitative tube, a piston is slidably connected to the inner middle part of the quantitative tube, a gasket is fixedly connected to the inner middle part of the quantitative tube and below the piston, and the gasket is in contact with the piston.

[0007] Preferably, a sealing ring is embedded in the circumferential surface of the piston, and the sealing ring contacts the inner wall of the quantitative tube. The sealing ring can increase the sealing performance between the piston and the quantitative tube.

[0008] Preferably, the liquid discharge mechanism comprises a connecting pipe fixedly connected to the quantitative tube, the end of the connecting pipe is fixedly connected to a shunt pipe, the outer side of the shunt pipe is rotatably connected to two hollow sleeves, the bottom of each hollow sleeve is fixedly connected to a connecting port, the inner side of the connecting port is threadedly connected to a liquid discharge pipe, and a retaining ring and a limiting ring are fixedly connected to the shunt pipe, and the retaining ring and the limiting ring are in contact with the hollow sleeve. The liquid is added into the shunt pipe through the connecting pipe, then enters into the hollow sleeve through the through hole, and finally discharged into another container through the liquid discharge pipe.

[0009] Preferably, a through hole is provided on the wall of the shunt pipe, and the position of the through hole corresponds to the hollow sleeve. The provision of the through hole facilitates the communication between the shunt pipe and the hollow sleeve.

[0010] Preferably, a locking sleeve is fixedly connected to the outside of the hollow sleeve, the locking sleeve is in contact with a limiting ring, a locking pin is slidably connected to the inside of the locking sleeve, the locking pin is plugged with the limiting ring, a spring 1 is arranged inside the locking sleeve, one end of the spring 1 is fixedly connected to the locking pin, the other end of the spring 1 is fixedly connected to the inner surface of the locking sleeve, a shifting block is fixedly connected to the pin body of the locking pin, the shifting block passes through the locking sleeve and is slidably connected to the locking sleeve. The locking pin will be inserted into the limiting ring laterally under the action of the spring 1, and has a locking and fixing effect on the hollow sleeve.

[0011] Preferably, the anti-backflow mechanism comprises a cone tube fixedly connected to the inner side of the connecting nozzle, a plug is slidably connected to the inner side of the upper end opening of the cone tube, a guide sheet is fixedly connected to the outer side of the plug, a guide rod is fixedly connected to the inner wall of the connecting nozzle, the guide rod passes through the guide sheet and is slidably connected to the guide sheet, a stopper is fixedly connected to the end of the guide rod, a spring 2 is sleeved on the outer side of the rod body of the guide rod, one end of the spring 2 is fixedly connected to the stopper, and the other end of the spring 2 is fixedly connected to the guide sheet. When the micro water pump is working, the air in the connecting nozzle will be evacuated, and then the plug will be pushed up under the action of pressure, and guided by the guide sheet and the guide rod, so that the liquid will enter the quantitative tube through the water inlet pipe, and when the transfer is completed and the micro water pump is turned off, the plug will be reset under the action of the spring 2, and the cone tube will be re-blocked, thereby achieving the effect of anti-backflow.

[0012] Preferably, the quantitative adjustment mechanism includes a baffle fixedly connected to the inner side of the quantitative tube, the baffle is located above the piston, a hollow tube is fixedly connected to the bottom center of the baffle, an elastic pin is slidably connected to the inner side of the hollow tube, a spring three is arranged on the inner side of the hollow tube, one end of the spring three is fixedly connected to the elastic pin, and the other end of the spring three is fixedly connected to the inner surface of the hollow tube, an adjustment sleeve is installed on the top of the quantitative tube through a bearing, and the adjustment sleeve penetrates the quantitative tube, an adjustment rod is threadedly connected to the inner side of the adjustment sleeve, and the lower section of the rod body of the adjustment rod is fixedly connected to two travel limit frames, and the travel limit frames penetrate the baffle and are slidably connected to the baffle. By turning the adjustment sleeve with the knob, the adjustment rod generates its axial displacement through the threaded movement with the adjustment sleeve, and at the same time, the adjustment rod drives the travel limit frame to adjust the height position, thereby adjusting the spacing between the remaining pistons, thereby achieving the purpose of quantitative adjustment of the pipetting amount.

[0013] Preferably, a knob is fixedly connected to the top of the adjustment sleeve, a bayonet is slidably connected to the inside of the knob, the bayonet is engaged with the quantitative tube, a spring 4 is arranged inside the knob, one end of the spring 4 is fixedly connected to the bayonet, and the other end of the spring 4 is fixedly connected to the inner surface of the knob. The elastic force of the spring 4 acts on the bayonet, so that the knob has a fixing effect after being screwed, and at the same time, a circle of slots distributed in an annular array is provided on the top of the quantitative tube for engaging the bayonet.

[0014] The beneficial effects of the present invention are as follows: the present invention relates to a rapid quantitative pipette, which has the characteristics of adjustable pipetting volume and liquid discharge direction. In specific use, compared with the prior art, it has the following two beneficial effects: First, a quantitative tube is provided, on which a micro water pump opened and closed by a control switch is provided, which is used for the liquid to enter and exit the quantitative tube, and then a piston is provided on the inner side of the quantitative tube, and a quantitative adjustment mechanism is provided at the same time. When the micro water pump draws the liquid into the quantitative tube, the piston can be pushed upward, and the area below the piston can be immediately pipetted. In addition, the quantitative adjustment mechanism can control the upward stroke of the piston, thereby achieving the purpose of quantitative adjustment of the pipetting amount, and it is more accurate. Secondly, a liquid discharge mechanism is arranged on the quantitative tube, the main body of the liquid discharge mechanism is composed of a connecting tube and a shunt tube, and then two rotatable hollow sleeves are arranged on the shunt tube, the liquid discharge tube is installed on the hollow sleeve, and then a retaining ring and a limit ring are arranged on both sides of the hollow sleeve to limit its axial position. In addition, a locking sleeve is arranged on the hollow sleeve, and the locking sleeve contains a locking pin that is retracted and extended by a spring, and the locking pin can be laterally inserted into the limit ring. In this way, the rotation angle of the hollow sleeve can be controlled by the insertion and positioning of the locking pin and the limit ring, and then the angle of the liquid discharge tube can be adjusted to achieve the purpose of adjustable liquid discharge direction. BRIEF DESCRIPTION OF THE DRAWINGS For ease of explanation, the present invention is described in detail with reference to the following specific implementations and the accompanying drawings.

[0016] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Formal cross-sectional view of Figure 3 For the present invention Figure 2 A magnified view of the local structure; Figure 4 For the present invention Figure 2 A magnified view of the structure of part A; Figure 5 For the present invention Figure 1 A cross-sectional view of a liquid outlet mechanism; Figure 6 For the present invention Figure 5 A magnified view of the structure of part B; Figure 7 For the present invention Figure 1 Schematic diagram of the local structure.

[0017] In the figure: 1, quantitative tube; 2, liquid discharge mechanism; 3, micro water pump; 4, control switch; 5, connecting nozzle; 6, water inlet pipe; 7, anti-backflow mechanism; 8, quantitative adjustment mechanism; 9, piston; 10, sealing ring; 11, gasket; 21, connecting pipe; 22, shunt pipe; 23, through hole; 24, hollow sleeve; 25, connecting port; 26, liquid discharge pipe; 27, retaining ring; 28, limiting ring; 29, locking sleeve; 210, locking pin; 211, shifting block; 212, spring one; 71, cone tube; 72, plug; 73, guide sheet; 74, guide rod; 75, retaining block; 76, spring two; 81, baffle; 82, hollow tube; 83, elastic pin; 84, spring three; 85, adjusting sleeve; 86, adjusting rod; 87, travel limit frame; 88, knob; 89, bayonet; 810, spring four. DETAILED DESCRIPTION like Figure 1-7 As shown, this specific implementation adopts the following technical solutions: Example: A rapid quantitative pipette comprises a quantitative tube 1, a micro water pump 3 is arranged at the inner bottom of the quantitative tube 1, a control switch 4 is arranged at the outer side of the quantitative tube 1, and the control switch 4 is electrically connected to the micro water pump 3, a connecting nozzle 5 is fixedly connected to the bottom of the quantitative tube 1, a water inlet pipe 6 is fixedly connected to the bottom of the connecting nozzle 5, a piston 9 is slidably connected to the inner middle of the quantitative tube 1, a gasket 11 is fixedly connected to the inner middle of the quantitative tube 1 and located below the piston 9, the gasket 11 is in contact with the piston 9, a sealing ring 10 is embedded in the circumferential surface of the piston 9, and the sealing ring 10 is in contact with the inner wall of the quantitative tube 1. By setting the sealing ring 10, the sealing between the piston 9 and the quantitative tube 1 can be increased.

[0019] The quantitative tube 1 is provided with a liquid discharge mechanism 2. The liquid is added into the shunt tube 22 through the connecting tube 21, then enters the hollow sleeve 24 through the through hole 23, and finally discharged into another container through the liquid discharge pipe 26. The liquid discharge mechanism 2 includes a connecting tube 21 fixedly connected to the quantitative tube 1, the end of the connecting tube 21 is fixedly connected with the shunt tube 22, the outer side of the shunt tube 22 is rotatably connected with two hollow sleeves 24, the bottom of each hollow sleeve 24 is fixedly connected with a connecting port 25, the inner side of the connecting port 25 is connected with the liquid discharge pipe 26 by threading, and the shunt tube 22 is fixedly connected with a retaining ring 27 and a limiting ring 28, and the retaining ring 27 and the limiting ring 28 are both in contact with the hollow sleeve 24. The tube wall of the shunt tube 22 is provided with a through hole 23, and the position of the through hole 23 corresponds to the hollow sleeve 24. The provision of the through hole 23 facilitates the communication between the shunt tube 22 and the hollow sleeve 24. The outer side of the hollow sleeve 24 is fixedly connected with a locking sleeve 29, and the locking sleeve 29 contacts the limiting ring 28. The locking sleeve 29 is slidably connected with a locking pin 210 inside, and the locking pin 210 is plugged with the limiting ring 28. A spring 1 212 is arranged inside the locking sleeve 29, and one end of the spring 1 212 is fixedly connected with the locking pin 210, and the other end of the spring 1 212 is fixedly connected to the inner surface of the locking sleeve 29. A shifting block 211 is fixedly connected to the pin body of the locking pin 210, and the shifting block 211 penetrates the locking sleeve 29 and is slidably connected with the locking sleeve 29. The locking pin 210 is laterally inserted into the limiting ring 28 under the action of the spring 1 212, and has a locking and fixing effect on the hollow sleeve 24.

[0020] Among them, the inner side of the connecting nozzle 5 is provided with an anti-backflow mechanism 7. When the micro water pump 3 is working, the air in the connecting nozzle 5 will be evacuated, and then the plug 72 will be pushed up under the action of pressure, and guided by the guide sheet 73 and the guide rod 74, so that the liquid enters the quantitative tube 1 through the water inlet pipe 6. When the transfer is completed and the micro water pump 3 is turned off, the plug 72 will be reset under the action of the spring 2 76 and re-block the cone tube 71, thereby achieving the effect of anti-backflow. The anti-backflow mechanism 7 includes a plug 72 fixedly connected to the connecting nozzle 5. The conical tube 71 on the side has a plug 72 slidably connected to the inner side of the upper end opening of the conical tube 71, and a guide piece 73 is fixedly connected to the outer side of the plug 72. A guide rod 74 is fixedly connected to the inner wall of the connecting nozzle 5. The guide rod 74 passes through the guide piece 73 and is slidably connected to the guide piece 73. A stopper 75 is fixedly connected to the end of the guide rod 74. A spring 76 is sleeved on the outer side of the rod body of the guide rod 74. One end of the spring 76 is fixedly connected to the stopper 75, and the other end of the spring 76 is fixedly connected to the guide piece 73.

[0021] Among them, a quantitative adjustment mechanism 8 is provided on the inner upper part of the quantitative tube 1. The adjustment sleeve 85 is rotated by the knob 88, and the adjustment rod 86 generates its axial displacement through the threaded movement with the adjustment sleeve 85. At the same time, the adjustment rod 86 will drive the stroke limit frame 87 to adjust the height position, thereby adjusting the spacing between the remaining pistons 9, and then achieving the purpose of quantitative adjustment of the pipetting amount. The quantitative adjustment mechanism 8 includes a baffle 81 fixedly connected to the inner side of the quantitative tube 1, and the baffle 81 is located above the piston 9. A hollow tube 82 is fixedly connected to the bottom center of the baffle 81, and an elastic pin 83 is slidably connected to the inner side of the hollow tube 82. A spring three 84 is provided on the inner side of the hollow tube 82, and one end of the spring three 84 is fixedly connected to the elastic pin 83. The other end of spring three 84 is fixedly connected to the inner surface of the hollow tube 82. An adjusting sleeve 85 is installed on the top of the quantitative tube 1 through a bearing, and the adjusting sleeve 85 passes through the quantitative tube 1. The inner side of the adjusting sleeve 85 is connected with an adjusting rod 86 through a thread. The lower section of the rod body of the adjusting rod 86 is fixedly connected with two travel limit frames 87. The travel limit frames 87 pass through the baffle 81 and are slidably connected to the baffle 81. A knob 88 is fixedly connected to the top of the adjusting sleeve 85. A bayonet 89 is slidably connected inside the knob 88. The bayonet 89 is snap-fitted with the quantitative tube 1. A spring four 810 is arranged inside the knob 88. One end of the spring four 810 is fixedly connected to the bayonet 89, and the other end of the spring four 810 is fixedly connected to the inner surface of the knob 88. The elastic force of spring four 810 acts on the bayonet pin 89, thereby fixing the knob 88 after it is turned. At the same time, a circle of slots distributed in an annular array is opened on the top of the quantitative tube 1 for the bayonet pin 89 to be connected.

[0022] The use state of the present invention is as follows: when in use, the water inlet pipe 6 is inserted into the container, and then the micro water pump 3 is started by the control switch 4, and the micro water pump 3 sucks the solution in the container into the quantitative tube 1. As the solution in the quantitative tube 1 is added, the piston 9 is immediately pushed up, and then the piston 9 contacts and pushes up the elastic pin 83, and the elastic pin 83 slides in the hollow tube 82 and compresses the spring three 84, and then the piston 9 contacts the travel limit frame 87 and stops moving. In this way, the amount of the quantitative tube 1 drawn into the area below the piston 9, and at the same time, the liquid is added to the shunt tube 22 through the connecting tube 21, and then through The through hole 23 enters into the hollow sleeve 24, and finally is discharged into another container through the liquid outlet pipe 26. In addition, the locking pin 210 is pulled by the shifting block 211, so that the locking pin 210 slides in the locking sleeve 29 and separates from the limiting ring 28, and then the hollow sleeve 24 is rotated, and the hollow sleeve 24 drives the liquid outlet pipe 26 to rotate. When the liquid outlet pipe 26 is adjusted to a required angle, the shifting block 211 is released, and the locking pin 210 is reset under the action of the spring 212 and inserted into the limiting ring 28, and the hollow sleeve 24 and the liquid outlet pipe 26 are positioned and locked, thereby achieving the purpose of adjusting the liquid outlet direction; In addition, by rotating the adjusting sleeve 85 through the knob 88, the adjusting rod 86 generates its axial displacement through the threaded movement with the adjusting sleeve 85. At the same time, the adjusting rod 86 will drive the stroke limit frame 87 to adjust the height position, thereby adjusting the distance between the remaining pistons 9, thereby achieving the purpose of quantitative adjustment of the pipetting amount.

[0023] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A rapid quantitative pipette, comprising a quantitative tube (1), characterized in that: The quantitative tube (1) is provided with a liquid discharge mechanism (2), the inner bottom of the quantitative tube (1) is provided with a micro water pump (3), the outer side of the quantitative tube (1) is provided with a control switch (4), and the control switch (4) is electrically connected to the micro water pump (3), the bottom of the quantitative tube (1) is fixedly connected with a connecting nozzle (5), the bottom of the connecting nozzle (5) is fixedly connected with a water inlet pipe (6), the inner side of the connecting nozzle (5) is provided with a backflow prevention mechanism (7), the inner upper part of the quantitative tube (1) is provided with a quantitative adjustment mechanism (8), the inner middle part of the quantitative tube (1) is slidably connected with a piston (9), and the inner middle part of the quantitative tube (1) and below the piston (9) is fixedly connected with a gasket (11), and the gasket (11) is in contact with the piston (9).

2. A rapid quantitative pipette according to claim 1, characterized in that: A sealing ring (10) is embedded in the circumferential surface of the piston (9), and the sealing ring (10) is in contact with the inner wall of the metering tube (1).

3. A rapid quantitative pipette according to claim 1, characterized in that: The liquid outlet mechanism (2) comprises a connecting tube (21) fixedly connected to the quantitative tube (1); the end of the connecting tube (21) is fixedly connected to a shunt tube (22); the outer side of the shunt tube (22) is rotatably connected to two hollow sleeves (24); the bottom of each hollow sleeve (24) is fixedly connected to a connecting port (25); the inner side of the connecting port (25) is connected to a liquid outlet tube (26) via a thread; a retaining ring (27) and a limiting ring (28) are fixedly connected to the shunt tube (22); the retaining ring (27) and the limiting ring (28) are both in contact with the hollow sleeve (24).

4. A rapid quantitative pipette according to claim 3, characterized in that: A through hole (23) is provided on the wall of the diverter pipe (22), and the position of the through hole (23) corresponds to the hollow sleeve (24).

5. A rapid quantitative pipette according to claim 3, characterized in that: A locking sleeve (29) is fixedly connected to the outer side of the hollow sleeve (24), the locking sleeve (29) is in contact with a limiting ring (28), a locking pin (210) is slidably connected to the interior of the locking sleeve (29), the locking pin (210) is plugged into the limiting ring (28), a spring (212) is arranged inside the locking sleeve (29), one end of the spring (212) is fixedly connected to the locking pin (210), the other end of the spring (212) is fixedly connected to the inner surface of the locking sleeve (29), a shifting block (211) is fixedly connected to the pin body of the locking pin (210), the shifting block (211) passes through the locking sleeve (29) and is slidably connected to the locking sleeve (29).

6. A rapid quantitative pipette according to claim 1, characterized in that: The backflow prevention mechanism (7) comprises a conical tube (71) fixedly connected to the inner side of the connecting nozzle (5); a plug (72) is slidably connected to the inner side of the upper end opening of the conical tube (71); a guide piece (73) is fixedly connected to the outer side of the plug (72); a guide rod (74) is fixedly connected to the inner wall of the connecting nozzle (5); the guide rod (74) passes through the guide piece (73) and is slidably connected to the guide piece (73); a stopper (75) is fixedly connected to the end of the guide rod (74); a second spring (76) is sleeved on the outer side of the rod body of the guide rod (74); one end of the second spring (76) is fixedly connected to the stopper (75); and the other end of the second spring (76) is fixedly connected to the guide piece (73).

7. A rapid quantitative pipette according to claim 1, characterized in that: The quantitative adjustment mechanism (8) comprises a baffle (81) fixedly connected to the inner side of the quantitative tube (1), the baffle (81) being located above the piston (9), a hollow tube (82) being fixedly connected to the center of the bottom of the baffle (81), an elastic pin (83) being slidably connected to the inner side of the hollow tube (82), a spring three (84) being arranged on the inner side of the hollow tube (82), one end of the spring three (84) being fixedly connected to the elastic pin (83), and the spring three (84) being fixedly connected to the elastic pin (83). The other end of the adjusting sleeve (84) is fixedly connected to the inner surface of the hollow tube (82); an adjusting sleeve (85) is installed on the top of the quantitative tube (1) via a bearing, and the adjusting sleeve (85) passes through the quantitative tube (1); an adjusting rod (86) is connected to the inner side of the adjusting sleeve (85) via a thread; the lower section of the rod body of the adjusting rod (86) is fixedly connected to two travel limit frames (87); the travel limit frames (87) pass through the baffle plate (81) and are slidably connected to the baffle plate (81).

8. A rapid quantitative pipette according to claim 7, characterized in that: A knob (88) is fixedly connected to the top of the adjustment sleeve (85), a bayonet (89) is slidably connected to the interior of the knob (88), the bayonet (89) is engaged with the quantitative tube (1), a spring (810) is arranged inside the knob (88), one end of the spring (810) is fixedly connected to the bayonet (89), and the other end of the spring (810) is fixedly connected to the inner surface of the knob (88).

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