Liquid transfer device without air contact

Abstract

The utility model discloses a liquid transfer device without air contact, which relates to the technical field of liquid transfer and comprises a bottom plate, a fixing plate mounted on the upper surface of the bottom plate, a fixing table mounted on the left side of the upper surface of the fixing plate, a sliding outer frame slidably arranged on the outer wall of the fixing table, and a connecting piece mounted on the right side of the sliding outer frame. A first fixing frame is installed on the connecting piece through two first fixing bolts, a pipette is installed on the inner wall of the first fixing frame, a limiting frame is installed on the outer wall of the pipette, a transmission shaft is rotationally installed on the right side of the inner wall of the limiting frame, and the lower end of the transmission shaft extends to the position below the limiting frame. According to the utility model, air in the pipette can be exhausted through the transmission mechanism before the pipette is used for transferring liquid, so that liquid which is in contact with the air and is easy to deteriorate is prevented from being in contact with the air, the whole pipette is in a sealed state during transferring, and some volatile chemical toxic liquid cannot be in contact with the outside; and the overall safety and practicability are high.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid transfer, in particular to a liquid transfer device without air contact. Background Art

[0002] Liquid transfer devices can also be called pipettes. The most common incarnation of pipettes is pipette guns. Pipettes are a measuring tool that transfers liquid from the original container to another container within a certain range. They are widely used in biology, chemistry and other fields.

[0003] Existing liquid transfer devices cannot be completely sealed when transferring some volatile chemical toxic liquids or liquids that are easily deteriorated when in contact with air. Some air will still enter the liquid, causing the liquid to deteriorate and causing economic losses. Therefore, a liquid transfer device without air contact is needed to meet people's needs. Utility Model Content

[0004] The purpose of the utility model is to provide a liquid transfer device without air contact, so as to solve the problem that the existing liquid transfer device proposed in the above background technology cannot be completely sealed when transferring some volatile chemical toxic liquids or liquids that are easily deteriorated when in contact with air, and some air can still enter the liquid, causing the liquid to deteriorate and causing economic losses.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a liquid transfer device without air contact, comprising a base plate, a fixed plate is installed on the upper surface of the base plate, a fixed platform is installed on the left side of the upper surface of the fixed plate, a sliding outer frame is slidably provided on the outer wall of the fixed platform, a connecting member is installed on the right side of the sliding outer frame, a first fixed frame is installed on the connecting member through two first fixing bolts, a pipette is installed on the inner wall of the first fixed frame, a limit frame is installed on the outer wall of the pipette, a transmission shaft is rotatably installed on the right side of the inner wall of the limit frame, the lower end of the transmission shaft extends to the bottom of the limit frame, a rotating block is installed on the lower end of the transmission shaft, and a transmission mechanism is arranged above the transmission shaft.

[0006] Preferably, the base plate includes a collecting tank at the top and a sealed liquid storage chamber at the rear side, a liquid outlet tube is installed at the output end of the pipette, and the other end of the liquid outlet tube is detachably connected to the input end of the collecting tank, a liquid extraction tube is installed at the input end of the pipette, and the other end of the liquid extraction tube is detachably connected to the input end of the sealed liquid storage chamber, a liquid extraction pump is provided on one side of the tube wall of the liquid extraction tube, and a stop valve is installed above the tube wall of the liquid outlet tube.

[0007] Preferably, the transmission mechanism includes a positioning plate, the lower surface of the positioning plate is fixed to the top of the pipette, the upper end of the transmission shaft extends to the top of the positioning plate, a driving gear is installed on the upper end of the transmission shaft, a driven gear is meshingly installed on the left side of the driving gear, a connecting shaft is installed below the driven gear, the lower end of the connecting shaft passes through and extends into the pipette, the shaft wall of the connecting shaft is rotatably connected to the top of the inner wall of the pipette, and an extrusion mechanism is provided below the connecting shaft.

[0008] Preferably, the extrusion mechanism includes a lifting screw, the upper end of the lifting screw is fixed to the lower end of the connecting shaft, the rod wall of the lifting screw is threadedly installed with a lifting extrusion plate, the left and right sides of the inner wall of the pipette gun are provided with sliding grooves, the inner walls of the two sliding grooves are slidably installed with sliders, and the opposite sides of the two sliders are respectively fixed to the left and right sides of the lifting extrusion plate.

[0009] Preferably, a plurality of mounting holes are provided on the left side of the fixing platform, and the sliding outer frame is fixed to the inner wall of a corresponding group of mounting holes by two corresponding second fixing bolts.

[0010] Preferably, extension blocks are installed above the front and rear side surfaces of the fixing platform, and a top guard plate is installed on the right sides of the two extension blocks.

[0011] Preferably, a load-bearing seat is installed at the four corners of the lower surface of the base plate through corresponding positioning columns, and movable wheels are installed at the four corners of the lower surface of the load-bearing seat.

[0012] The beneficial effects of the utility model are:

[0013] In the utility model, through the arrangement of the bottom plate, the fixed plate, the fixed platform, the sliding outer frame, the connecting piece, the first fixed frame, the pipette, the limit frame, the transmission shaft, the rotating block and the transmission mechanism, the air in the pipette can be discharged through the transmission mechanism before the pipette is used to transfer the liquid, so as to avoid the liquid that is easily deteriorated by contact with the air from contacting the air, and the whole is in a sealed state during the transfer, and some volatile chemical toxic liquids will not contact the outside world, so the overall safety and practicality are high.

[0014] In the utility model, by arranging the fixing platform, the first fixing bolt, the first fixing frame, the mounting hole and the second fixing bolt, not only the height of the pipette gun itself can be adjusted for easy use, but also the pipette gun can be conveniently disassembled from the fixing platform for easy cleaning and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a liquid transfer device without air contact proposed by the utility model;

[0016] Figure 2This is a side view of a three-dimensional structure diagram of a liquid transfer device without air contact proposed by the utility model;

[0017] Figure 3 This is a front cross-sectional structural schematic diagram of a liquid transfer device without air contact proposed by the utility model;

[0018] Figure 4 The utility model provides a liquid transfer device without air contact. Figure 3 Schematic diagram of the structure of part A.

[0019] In the figure: 1. bottom plate; 2. fixed plate; 3. fixed platform; 4. sliding outer frame; 5. connecting piece; 6. first fixed frame; 7. pipette gun; 8. sealed liquid storage chamber; 9. suction tube; 10. collecting tank; 11. liquid outlet pipe; 12. stop valve; 13. limit frame; 14. rotating block; 15. positioning plate; 16. transmission shaft; 17. driving gear; 18. driven gear; 19. connecting shaft; 20. lifting screw; 21. slide groove; 22. slider; 23. lifting squeeze plate; 24. mounting hole; 25. extension block; 26. top guard plate; 27. positioning column; 28. load-bearing seat; 29. ​​moving wheel. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Example: Please refer to Figure 1-4 The utility model provides a technical solution: a liquid transfer device without air contact, comprising a bottom plate 1, a fixed plate 2 is installed on the upper surface of the bottom plate 1, a fixed platform 3 is installed on the left side of the upper surface of the fixed plate 2, a sliding outer frame 4 is slidably arranged on the outer wall of the fixed platform 3, a connecting member 5 is installed on the right side of the sliding outer frame 4, a first fixing frame 6 is installed on the connecting member 5 through two first fixing bolts, a pipette gun 7 is installed on the inner wall of the first fixing frame 6, a limit frame 13 is installed on the outer wall of the pipette gun 7, a transmission shaft 16 is rotatably installed on the right side of the inner wall of the limit frame 13, the lower end of the transmission shaft 16 extends to the bottom of the limit frame 13, a rotating block 14 is installed on the lower end of the transmission shaft 16, and a transmission mechanism is arranged above the transmission shaft 16. Before using the pipette gun 7 to transfer liquid, the air in the pipette gun 7 can be discharged through the transmission mechanism to avoid liquid that is easily deteriorated by contact with air from contacting with air, and the whole is in a sealed state during transfer, and some volatile chemical toxic liquids will not contact with the outside world, and the overall safety and practicality are high.

[0022] like Figure 1 and 2As shown, the outer wall of the fixed platform 3 is slidably provided with a sliding outer frame 4, and a connecting member 5 is installed on the right side of the sliding outer frame 4. The connecting member 5 is installed with a first fixed frame 6 through two first fixing bolts, and a pipette gun 7 is installed on the inner wall of the first fixed frame 6. A plurality of groups of mounting holes 24 are provided on the left side of the fixed platform 3, and the sliding outer frame 4 is fixed to the inner wall of a corresponding group of mounting holes 24 through two corresponding second fixing bolts. Not only can the height of the pipette gun 7 itself be adjusted for easy use, but also the pipette gun 7 can be conveniently disassembled from the fixed platform 3 for easy cleaning and use.

[0023] like Figure 1 and 3 As shown, extension blocks 25 are installed above the front and rear side surfaces of the fixed platform 3, and a top guard plate 26 is installed on the right side of the two extension blocks 25 to protect the top of the pipette gun 7 to prevent falling objects from affecting its use. The four corners of the lower surface of the base plate 1 are jointly installed with a load-bearing seat 28 through corresponding positioning columns 27, and the four corners of the lower surface of the load-bearing seat 28 are installed with moving wheels 29 to facilitate the movement of the entire device, and the load-bearing seat 28 can improve the overall stability of the device.

[0024] Working principle of the utility model: when in use, the transmission shaft 16 can be rotated by the rotating block 14 first, and the rotation of the transmission shaft 16 drives the driving gear 17 on the positioning plate 15 to rotate, and then drives the driven gear 18 to rotate, and the driven gear 18 rotates through the connecting shaft 19 to drive the lifting screw 20 in the liquid transfer gun 7 to rotate. At this time, under the limit guidance of the slider 22 in the two slide grooves 21, the lifting and squeezing plate 23 can be moved downward to squeeze out the residual air in the liquid transfer gun 7 from the output end. After squeezing out, the lifting and squeezing plate 23 is controlled to return to the top. At this time, after the liquid extraction pipe 9 and the liquid outlet pipe 11 are connected, the liquid extraction pump is turned on to draw the liquid stored in the sealed liquid storage chamber 8 into the liquid transfer gun 7 through the liquid extraction pipe 9;

[0025] At this time, open the stop valve 12 on the liquid outlet pipe 11, and rotate the rotating block 14 again, so that the lifting and squeezing disk 23 squeezes the liquid into the pipette gun 7. Under the action of gravity and squeezing force, the liquid in the pipette gun 7 will be squeezed into the collection tank 10 through the liquid outlet pipe 11 for storage. The whole process is in a sealed state, and the air in the pipette gun 7 is discharged in advance to avoid liquid contact with air, which is very practical.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A liquid transfer device without air contact, comprising a bottom plate (1), characterized in that: A fixing plate (2) is installed on the upper surface of the base plate (1), a fixing platform (3) is installed on the left side of the upper surface of the fixing plate (2), a sliding outer frame (4) is slidably provided on the outer wall of the fixing platform (3), a connecting member (5) is installed on the right side of the sliding outer frame (4), a first fixing frame (6) is installed on the connecting member (5) through two first fixing bolts, a liquid transfer gun (7) is installed on the inner wall of the first fixing frame (6), a limit frame (13) is installed on the outer wall of the liquid transfer gun (7), a transmission shaft (16) is rotatably installed on the right side of the inner wall of the limit frame (13), the lower end of the transmission shaft (16) extends to the bottom of the limit frame (13), a rotating block (14) is installed on the lower end of the transmission shaft (16), and a transmission mechanism is arranged above the transmission shaft (16).

2. The liquid transfer device without air contact according to claim 1, characterized in that: The bottom plate (1) comprises a collecting tank (10) at the top and a sealed liquid storage chamber (8) at the rear. The output end of the pipette (7) is provided with a liquid outlet pipe (11), and the other end of the liquid outlet pipe (11) is detachably connected to the input end of the collecting tank (10). The input end of the pipette (7) is provided with a liquid extraction pipe (9), and the other end of the liquid extraction pipe (9) is detachably connected to the input end of the sealed liquid storage chamber (8). A liquid extraction pump is provided on one side of the tube wall of the liquid extraction pipe (9), and a stop valve (12) is provided above the tube wall of the liquid outlet pipe (11).

3. The liquid transfer device without air contact according to claim 1, characterized in that: The transmission mechanism comprises a positioning plate (15), the lower surface of which is fixed to the upper part of the pipette gun (7), the upper end of which extends to the upper part of the positioning plate (15), the upper end of which is mounted with a driving gear (17), the left side of which is meshed with a driven gear (18), the lower part of which is mounted with a connecting shaft (19), the lower end of which passes through and extends into the pipette gun (7), the shaft wall of which is rotatably connected to the upper part of the inner wall of the pipette gun (7), and the lower part of which is provided with a squeezing mechanism.

4. The liquid transfer device without air contact according to claim 3, characterized in that: The extrusion mechanism comprises a lifting screw (20), the upper end of which is fixed to the lower end of the connecting shaft (19), a lifting extrusion plate (23) is threadedly mounted on the rod wall of the lifting screw (20), and a slide groove (21) is provided on the left and right sides of the inner wall of the pipette gun (7), and sliders (22) are slidably mounted on the inner walls of the two slide grooves (21), and the opposite sides of the two sliders (22) are respectively fixed to the left and right sides of the lifting extrusion plate (23).

5. The liquid transfer device without air contact according to claim 1, characterized in that: A plurality of mounting holes (24) are provided on the left side of the fixing platform (3), and the sliding outer frame (4) is fixed to the inner wall of a corresponding group of mounting holes (24) via two corresponding second fixing bolts.

6. The liquid transfer device without air contact according to claim 1, characterized in that: Extension blocks (25) are installed above the front and rear surfaces of the fixing platform (3), and a top guard plate (26) is installed on the right sides of the two extension blocks (25).

7. The liquid transfer device without air contact according to claim 1, characterized in that: A load-bearing seat (28) is installed at the four corners of the lower surface of the base plate (1) via corresponding positioning columns (27), and moving wheels (29) are installed at the four corners of the lower surface of the load-bearing seat (28).

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