A pipette capacity calibration device

Abstract

The utility model discloses a pipette capacity calibration device, belonging to the technical field of pipette calibration, comprising a base and a support frame mounted on the base, the support frame being provided with a groove, a moving mechanism being arranged in the groove of the support frame, a supporting assembly being fixedly connected to the moving mechanism, one end of the supporting assembly being fixedly connected to a fixed disk, positioning pieces being inserted around the fixed disk, a pipette body being mounted on one end of the positioning piece away from the fixed disk, a fixing mechanism being arranged around the bottom of the fixed disk at positions corresponding to the positioning pieces, the pipette body being calibrated by designing a capacity calibration method, in which the volume marked in the pipette body is compared with the volume of a measuring cup, so as to achieve the calibration of the pipette body, which not only simplifies the steps of calibrating the pipette body, but also reduces the possibility of the influence of some uncertain factors.

Description

Technical Field

[0001] The utility model relates to the technical field of pipette calibration, in particular to a pipette capacity calibration device. Background Art

[0002] In experiments, we usually need to operate trace amounts of liquid. Using a pipette can effectively reduce errors and ensure the accuracy of experimental results. However, if the pipette is not calibrated for a long time, its accuracy will decrease. It needs to be calibrated regularly according to the frequency and usage. If it is not calibrated, the error will gradually increase, affecting the accuracy of the experiment.

[0003] According to the announcement number: CN218600668U, a handheld pipette capacity calibration device is proposed, including a base, a pipette body and a beaker, and also includes an automatic measuring mechanism. A first electric lifting rod is fixedly connected to the left side of the top of the base, and the top of the first electric lifting rod is fixedly connected to a mounting plate, and a right-angle bent plate is fixedly connected to the upper surface of the mounting plate, and a support rod is fixedly connected to the right side of the right-angle bent plate surface, and a tube clamp is fixedly connected to the right end of the support rod. The pipette body is clamped and fixed by the tube clamp, and a downward pressure component is fixedly connected to the top of the right-angle bent plate. The beneficial effect of the utility model is that the utility model only needs the staff to manually input the volume value of the added pure water to automatically calculate the error value, thereby achieving the calibration effect. The operation is simple and convenient, and there is no need for multiple manual calculations, which effectively reduces the workload and avoids errors in manual calculations.

[0004] According to the above introduction, the existing calibration method is to use a scale to weigh the weight of the material, calculate the volume to be absorbed, and then calibrate the pipette, which makes the calibration steps of the pipette cumbersome. At the same time, some uncertain factors are prone to affect the calibration effect of the pipette during the calibration process. In order to solve the above problems, a pipette capacity calibration device is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a pipette capacity calibration device, which performs a calibration operation on a pipette body by designing a capacity calibration method. In the capacity calibration method, the volume marked on the pipette body is compared with the volume of a measuring cup, thereby achieving calibration of the pipette body, which not only simplifies the steps of pipette body calibration, but also reduces the possibility of influence of some uncertain factors, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pipette capacity calibration device, comprising a base and a support frame installed on the base, the support frame having a groove, a moving mechanism being arranged in the groove of the support frame, a supporting assembly being fixedly connected to the moving mechanism, a fixed disk being fixedly connected to one end of the supporting assembly, positioning pieces being inserted around the fixed disk, a pipette body being installed at one end of the positioning piece away from the fixed disk, fixing mechanisms being arranged around the bottom of the fixed disk at positions corresponding to the positioning pieces, a positioning hole being arranged on the positioning piece, and the top of the fixing mechanism being inserted into the inner cavity of the positioning hole.

[0007] Preferably, a placement plate is provided directly below the pipette body, a limiting ring is fixedly connected to the surface of the placement plate around, and a measuring cup corresponding to the pipette body is placed in the inner cavity of the limiting ring.

[0008] Preferably, the moving mechanism includes a stepper motor, which is positioned in a groove of a support frame and fixed on a base, the output shaft of the stepper motor is fixedly connected to a screw rod, the top of the screw rod is rotatably connected to the groove of the support frame, the surface of the screw rod is threadedly connected to a threaded sleeve, the outer wall of the threaded sleeve is fixedly connected to a connecting block, and the outer side surface of the connecting block is fixedly connected to one end of the support assembly.

[0009] Preferably, the support assembly includes one side of a fixed rod fixedly connected to a connecting block, a connecting rod fixedly connected to the outer side of the fixed rod, the other end of the connecting rod fixedly connected to the surface of a fixed plate, a support rod fixedly connected at a corner of the fixed rod and the connecting rod, and the support rod is arranged in an inclined shape.

[0010] Preferably, the positioning member comprises a positioning rod and a fixing ring, one end of the positioning rod is plugged into the fixing plate, the positioning hole is formed on the positioning rod, and the other end of the positioning rod is fixedly connected to the outer wall of the fixing ring.

[0011] Preferably, the fixing mechanism includes a fixing block, which is fixed to the bottom of the fixing plate and corresponds to the position of the positioning rod. A nut is embedded in the fixing block, and a positioning bolt is threadedly connected to the inner cavity of the nut. The top of the positioning bolt is inserted into the inner cavity of the positioning hole.

[0012] Preferably, an electric push rod is fixedly connected to the center of the top of the fixed plate, a piston rod of the electric push rod is fixedly connected to a pressure plate, and the lower surface of the pressure plate is in contact with the top of the pipette body.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model provides a pipette capacity calibration device, which performs a calibration operation on a pipette body by designing a capacity calibration method. In the capacity calibration method, the volume marked on the pipette body is compared with the volume of the measuring cup, so as to calibrate the pipette body, which not only simplifies the steps of pipette body calibration, but also reduces the possibility of influence of some uncertain factors.

[0015] 2. The utility model provides a pipette capacity calibration device, which can install and fix the positioning member through the set fixing mechanism, so that the staff can conveniently operate and calibrate a single or multiple pipette bodies at the same time, thereby improving the efficiency of pipette body calibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the structure of the moving mechanism, the supporting assembly and the fixed plate of the utility model;

[0018] Figure 3 It is a schematic diagram of the structure decomposition of the fixing plate and the positioning member of the utility model;

[0019] Figure 4 It is a schematic diagram of the structure of the fixing plate and the fixing mechanism of the utility model.

[0020] Numbers in the figure: 1. base; 2. support frame; 3. moving mechanism; 31. stepping motor; 32. lead screw; 33. threaded sleeve; 34. connecting block; 4. support assembly; 41. fixing rod; 42. connecting rod; 43. support rod; 5. fixing plate; 6. positioning piece; 61. positioning rod; 62. fixing ring; 7. pipette body; 8. fixing mechanism; 81. fixing block; 82. nut; 83. positioning bolt; 9. positioning hole; 10. placement plate; 11. limiting ring; 12. measuring cup; 13. electric push rod; 14. pressure plate. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The utility model provides Figures 1 to 4The device for calibrating the volume of a pipette shown in the figure comprises a base 1 and a support frame 2 mounted on the base 1, the support frame 2 is provided with a groove, a moving mechanism 3 is arranged in the groove of the support frame 2, a supporting assembly 4 is fixedly connected to the moving mechanism 3, a fixing plate 5 is fixedly connected to one end of the supporting assembly 4, a positioning piece 6 is inserted around the fixing plate 5, a pipette body 7 is installed at one end of the positioning piece 6 away from the fixing plate 5, a fixing mechanism 8 is arranged around the bottom of the fixing plate 5 at a position corresponding to the positioning piece 6, the positioning piece 6 is provided with a positioning hole 9, the top of the fixing mechanism 8 is inserted into the inner cavity of the positioning hole 9, and the positioning piece 6 can be arranged by the setting of the fixing mechanism 8 The pipette body 7 is fixedly installed, so that it is convenient for the staff to operate and calibrate a single or multiple pipette bodies 7 at the same time. A placing plate 10 is arranged directly below the pipette body 7. A limiting ring 11 is fixedly connected to the surface of the placing plate 10 on all sides. A measuring cup 12 corresponding to the pipette body 7 is placed in the inner cavity of the limiting ring 11. The pipette body 7 is calibrated by designing a capacity calibration method. In the capacity calibration method, the volume marked on the pipette body 7 is compared with the volume of the measuring cup 12, so as to calibrate the pipette body 7. This not only simplifies the steps of calibrating the pipette body 7, but also reduces the possibility of being affected by some uncertain factors.

[0023] The moving mechanism 3 includes a stepping motor 31, which is positioned in the groove of the support frame 2 and fixed on the base 1. The output shaft of the stepping motor 31 is fixedly connected with a screw rod 32, and the top of the screw rod 32 is rotatably connected to the groove of the support frame 2. The surface of the screw rod 32 is threadedly connected with a threaded sleeve 33, and the outer wall of the threaded sleeve 33 is fixedly connected with a connecting block 34. The outer side surface of the connecting block 34 is fixedly connected to one end of the support assembly 4. The driving force provided by the arranged stepping motor 31 drives the screw rod 32 to rotate, and then the cooperation of the threaded sleeve 33 and the connecting block 34 can drive the fixed plate 5 on the support assembly 4 to be raised and lowered, so that the distance between the pipette body 7 installed on the fixed plate 5 and the measuring cup 12 can be adjusted, so that the liquid absorbed in the pipette body 7 is conveniently introduced into the measuring cup 12, so that the volume of the pipette body 7 is calibrated by the capacity of the liquid in the measuring cup 12.

[0024] The support assembly 4 includes one side of a fixed rod 41 fixedly connected to the connecting block 34, a connecting rod 42 fixedly connected to the outer side of the fixed rod 41, the other end of the connecting rod 42 fixedly connected to the surface of the fixed plate 5, and a support rod 43 fixedly connected at the corner of the fixed rod 41 and the connecting rod 42. The support rod 43 is arranged in an inclined shape, and the cooperation of the set fixed rod 41, the connecting rod 42 and the support rod 43 can provide a supporting effect between the connecting block 34 and the fixed plate 5, so that the movable mechanism 3 can drive the position of the fixed plate 5 to be raised and lowered through the support assembly 4 when driving.

[0025] The positioning member 6 includes a positioning rod 61 and a fixing ring 62. One end of the positioning rod 61 is inserted into the fixing plate 5, and the positioning hole 9 is opened on the positioning rod 61. The other end of the positioning rod 61 is fixedly connected to the outer wall of the fixing ring 62. By cooperating with the positioning rod 61 and the fixing ring 62, the pipette body 7 can be installed and connected to the fixing plate 5.

[0026] The fixing mechanism 8 includes a fixing block 81, which is fixed to the bottom of the fixing plate 5 and corresponds to the position of the positioning rod 61. A nut 82 is embedded in the fixing block 81. The inner cavity of the nut 82 is threadedly connected with a positioning bolt 83. The top of the positioning bolt 83 is inserted into the inner cavity of the positioning hole 9. The installation between the positioning rod 61 and the fixing plate 5 can be positioned by cooperating with the setting of the fixing block 81, the nut 82 and the positioning bolt 83, thereby enhancing the fixing effect of the positioning rod 61.

[0027] An electric push rod 13 is fixedly connected to the center of the top of the fixed plate 5, and a pressure plate 14 is fixedly connected to the piston rod of the electric push rod 13. The lower surface of the pressure plate 14 is in contact with the top of the pipette body 7. The electric push rod 13 is provided to provide a driving force to drive the pressure plate 14 to move, thereby providing pressure to the pipette body 7 to squeeze the liquid sucked in the pipette body 7, replacing the manual operation of the staff.

[0028] When in use, the pipette body 7 is calibrated by designing a capacity calibration method. First, the pipette body 7 filled with liquid is installed on the positioning member 6, and then fixed to the fixed plate 5 through the positioning member 6. While fixing, the positioning rod 61 and the fixed plate 5 can be positioned by the cooperation of the set fixing block 81, the nut 82 and the positioning bolt 83, thereby enhancing the fixing effect of the positioning rod 61. Subsequently, the stepping motor 31 in the moving mechanism 3 provides a driving force to drive the screw rod 32 to rotate, and then the fixing plate 5 on the support assembly 4 can be driven to rise and fall by the cooperation of the threaded sleeve 33 and the connecting block 34. The distance between the pipette body 7 mounted on the fixed plate 5 and the measuring cup 12 can be adjusted, so that the liquid sucked in the pipette body 7 can be introduced into the measuring cup 12 conveniently. Then, the electric push rod 13 provides driving force to drive the pressure plate 14 to move, thereby providing pressure to the pipette body 7, and squeezing the liquid sucked in the pipette body 7 into the measuring cup 12, replacing the manual operation of the staff. Then, the volume marked in the pipette body 7 is compared with the volume of the measuring cup 12, so as to calibrate the pipette body 7, which not only simplifies the steps of calibrating the pipette body 7, but also reduces the possibility of being affected by some uncertain factors.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pipette capacity calibration device, comprising a base (1) and a support frame (2) mounted on the base (1), characterized in that: The support frame (2) is provided with a groove, a moving mechanism (3) is arranged in the groove of the support frame (2), a supporting assembly (4) is fixedly connected to the moving mechanism (3), one end of the supporting assembly (4) is fixedly connected to a fixed disk (5), positioning members (6) are inserted around the fixed disk (5), a pipette body (7) is installed at one end of the positioning member (6) away from the fixed disk (5), a fixing mechanism (8) is arranged around the bottom of the fixed disk (5) at positions corresponding to the positioning member (6), a positioning hole (9) is arranged on the positioning member (6), and the top of the fixing mechanism (8) is inserted into the inner cavity of the positioning hole (9).

2. A pipette capacity calibration device according to claim 1, characterized in that: A placement plate (10) is arranged directly below the pipette body (7), and a limiting ring (11) is fixedly connected to the surface of the placement plate (10) on all sides, and a measuring cup (12) corresponding to the pipette body (7) is placed in the inner cavity of the limiting ring (11).

3. A pipette capacity calibration device according to claim 2, characterized in that: The moving mechanism (3) comprises a stepper motor (31), the stepper motor (31) is positioned in a groove of a support frame (2) and fixed on a base (1), the output shaft of the stepper motor (31) is fixedly connected to a screw rod (32), the top of the screw rod (32) is rotatably connected to the groove of the support frame (2), the surface of the screw rod (32) is threadedly connected to a threaded sleeve (33), the outer wall of the threaded sleeve (33) is fixedly connected to a connecting block (34), and the outer side surface of the connecting block (34) is fixedly connected to one end of the support assembly (4).

4. A pipette capacity calibration device according to claim 3, characterized in that: The support assembly (4) comprises a fixed connection between one side of a fixing rod (41) and a connecting block (34); a connecting rod (42) is fixedly connected to the outer side of the fixing rod (41); the other end of the connecting rod (42) is fixedly connected to the surface of a fixing plate (5); a support rod (43) is fixedly connected at a corner between the fixing rod (41) and the connecting rod (42); and the support rod (43) is arranged in an inclined shape.

5. A pipette capacity calibration device according to claim 1, characterized in that: The positioning member (6) comprises a positioning rod (61) and a fixing ring (62), one end of the positioning rod (61) is plugged into the fixing plate (5), the positioning hole (9) is formed on the positioning rod (61), and the other end of the positioning rod (61) is fixedly connected to the outer wall of the fixing ring (62).

6. A pipette capacity calibration device according to claim 5, characterized in that: The fixing mechanism (8) comprises a fixing block (81), the fixing block (81) being fixed to the bottom of the fixing plate (5) and corresponding to the position of the positioning rod (61), a nut (82) being embedded in the fixing block (81), a positioning bolt (83) being threadedly connected to the inner cavity of the nut (82), and the top of the positioning bolt (83) being inserted into the inner cavity of the positioning hole (9).

7. A pipette capacity calibration device according to claim 1, characterized in that: An electric push rod (13) is fixedly connected to the center of the top of the fixed plate (5), and a pressure plate (14) is fixedly connected to the piston rod of the electric push rod (13). The lower surface of the pressure plate (14) is in contact with the top of the pipette body (7).

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