Volume calibration device for pipettor

Abstract

The utility model belongs to the technical field of pipettor calibration, and discloses a pipettor capacity calibration device which comprises a supporting plate and a liquid storage cup arranged at the upper end of the left side, a weighing module is arranged at the upper end of the right side of the supporting plate, a measuring cup is placed at the upper end of the weighing module, a lifting rod penetrates through the middle of the supporting plate, and a supporting rod is fixed to the upper end of the lifting rod. A hole is formed in the left side of the supporting rod, a clamping block is arranged in the hole, a driven gear is rotationally arranged in the supporting plate, a limiting sleeve is fixed to the upper end of the driven gear, the lifting rod penetrates through the limiting sleeve, and a power motor is fixed to the lower end of the right side of the supporting plate. The pipettor capacity calibration device is provided with the quick clamping structure, can quickly fix and mount the pipettor, improves the stability during operation, can realize automatic liquid discharge detection of the pipettor, is simple and convenient to operate, is provided with the liquid suction structure, can prevent liquid attached to the surface of the pipettor from dripping into the measuring cup, and improves the accuracy of the volume calibration of the pipettor. And the detection precision is ensured.

Description

Technical Field

[0001] This utility model relates to the field of pipette calibration technology, specifically a pipette capacity calibration device. Background Technology

[0002] A pipette, also called a pipette, is a measuring tool used to transfer liquid from one container to another within a certain volume range. It is widely used in fields such as biology and chemistry. To ensure the accuracy of experiments, pipettes need to be calibrated after a period of use, requiring the use of a professional pipette volume calibration device.

[0003] An existing handheld pipette volume calibration device, such as the one described in Chinese patent application number CN202221673204.8, comprises a base, a pipette body, and a beaker, as well as an automatic calculation mechanism. A first electric lifting rod is fixedly connected to the top left side of the base, and a mounting plate is fixedly connected to the top of the first electric lifting rod. A right-angled curved 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-angled curved plate. A tube clamp is fixedly connected to the right end of the support rod, and the pipette body is clamped and fixed by the tube clamp. A pressing component is fixedly connected to the top of the right-angled curved plate. However, the existing pipette volume calibration device is not convenient for continuous multiple tests, requiring manual aspiration before installation and calibration, resulting in relatively low operational efficiency.

[0004] Therefore, we proposed a pipette volume calibration device to address the problems mentioned above. Utility Model Content

[0005] The purpose of this invention is to provide a pipette volume calibration device to solve the problem mentioned in the background art that existing pipette volume calibration devices are not convenient for continuous multiple calibration tests.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a pipette volume calibration device, including a support plate and a liquid storage cup disposed on the upper left side, a weighing module disposed on the upper right side of the support plate, and a measuring cup placed on the upper end of the weighing module:

[0007] A lifting rod runs through the middle of the support plate, and a support rod is fixed at the upper end of the lifting rod. A hole is opened on the left side of the support rod, and a clamping block is set inside the hole.

[0008] The support plate has a driven gear that rotates inside, and a limit sleeve is fixed to the upper end of the driven gear. The lifting rod passes through the limit sleeve. A power motor is fixed to the lower right end of the support plate, and a drive gear is connected to the upper shaft end of the power motor.

[0009] The weighing module is provided with support frames on both sides, and the upper end of the support frames is connected to an absorbent sponge.

[0010] Preferably, the clamping block is slidably connected to the inner wall of the hole, the left end of the support rod has a threaded rod passing through it, and the threaded rod is rotatably connected to the support rod, and the right end of the threaded rod is threadedly connected to the clamping block.

[0011] Using the above technical solution, the pipette is installed and positioned by adjusting the position of the clamping block using a threaded rod.

[0012] Preferably, a first electric push rod is fixed to the left end of the support rod, and a pressure plate is fixed to the upper end of the first electric push rod, with the left side of the pressure plate extending above the hole.

[0013] Using the above technical solution, the dispensing measurement of the pipette is controlled by raising and lowering the first electric push rod pressure plate.

[0014] Preferably, the drive gear is disposed inside the support plate, the upper shaft end of the power motor extends into the support plate and is fixed to the drive gear, and the drive gear meshes with the driven gear.

[0015] Using the above technical solution, the pipette is driven to rotate and change position through the cooperation of a power motor, a drive gear, and a driven gear.

[0016] Preferably, the limiting sleeve is rotatably connected to the inner wall of the support plate, and the lifting rod is slidably connected to the limiting sleeve. The lifting rod has a square structure design. A second electric push rod is fixed at the lower end of the support plate and is suspended by an "L"-shaped fixing frame. A transmission plate is fixed at the upper end of the second electric push rod, and the right side of the transmission plate is rotatably connected to the lifting rod.

[0017] Using the above technical solution, the lifting rod can be driven up and down to change the height of the pipette via the second electric push rod.

[0018] Preferably, the support frame is designed in an "L" shape and is symmetrically distributed on both sides of the measuring cup.

[0019] Using the above technical solution, the absorbent sponge is fixed by a support frame, and the absorbent sponge can absorb the liquid adhering to the surface of the pipette.

[0020] Compared with the prior art, the beneficial effects of this utility model are: the pipette volume calibration device;

[0021] 1. It is equipped with a quick-clamping structure to quickly fix and install the pipette, improve the stability during operation, and realize the automatic liquid discharge detection of the pipette. It is simple and convenient to operate. It is also equipped with a liquid suction structure to prevent liquid adhering to the pipette surface from dripping into the measuring cup, thus ensuring the accuracy of the detection.

[0022] 2. It is equipped with a rotary drive structure, a lifting structure and a pipette discharge structure, which can automatically perform testing after the pipette is installed, resulting in high operating efficiency. It also uses electrical control for pipette discharge, which is more accurate than manual discharge and can perform accuracy tests for different discharge volumes. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the structure of this utility model from below;

[0025] Figure 3 This is a schematic diagram of the driving gear and driven gear of this utility model;

[0026] Figure 4 This is a schematic diagram of the clamping block and threaded rod structure of this utility model;

[0027] Figure 5 This is a schematic diagram of the support frame and absorbent sponge structure of this utility model.

[0028] In the diagram: 1. Support plate; 2. Liquid storage cup; 3. Weighing module; 4. Measuring cup; 5. Lifting rod; 6. Support rod; 7. Clamping block; 8. Threaded rod; 9. First electric push rod; 10. Pressure plate; 11. Driven gear; 12. Limiting sleeve; 13. Power motor; 14. Drive gear; 15. Second electric push rod; 16. Transmission plate; 17. Support frame; 18. Liquid-absorbing sponge. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1-5This utility model provides a technical solution: a pipette volume calibration device, including a support plate 1 and a liquid storage cup 2 set at the upper left end. A weighing module 3 is set at the upper right end of the support plate 1, and a measuring cup 4 is placed on the upper end of the weighing module 3. A lifting rod 5 passes through the middle of the support plate 1, and a support rod 6 is fixed at the upper end of the lifting rod 5. A hole is opened on the left side of the support rod 6, and a clamping block 7 is set inside the hole. The clamping block 7 is slidably connected to the inner wall of the hole. A threaded rod 8 passes through the left end of the support rod 6, and the threaded rod 8 is rotatably connected to the support rod 6. The right end of the threaded rod 8 is threadedly connected to the clamping block 7. The weighing module 3 can accurately weigh the weight of the liquid discharged from the pipette into the measuring cup 4. In use, the pipette is first placed through the hole, and the shape of the hole matches the outer wall of the pipette. After placement, the threaded rod 8 is rotated to drive the clamping block 7 to move inside the hole, thereby clamping and fixing the pipette and maintaining stability during subsequent calibration operations.

[0031] A first electric push rod 9 is fixed to the left end of the support rod 6, and a pressure plate 10 is fixed to the upper end of the first electric push rod 9. The pressure plate 10 extends to the top of the hole on the left side. The first electric push rod 9 and the pressure plate 10 can be used to perform liquid aspiration and dispensing operations on the pipette. The first electric push rod 9 is a high-precision servo push rod, which can achieve precise extension and retraction with the help of the PLC control unit. The first electric push rod 9 drives the pressure plate 10 to lift and lower to control the pipette to aspirate and dispense liquid.

[0032] A driven gear 11 is rotatably mounted inside the support plate 1, and a limit sleeve 12 is fixed to the upper end of the driven gear 11. The lifting rod 5 passes through the limit sleeve 12. A power motor 13 is fixed to the lower right side of the support plate 1, and a drive gear 14 is connected to the upper shaft end of the power motor 13. The drive gear 14 is located inside the support plate 1, and the upper shaft end of the power motor 13 extends into the support plate 1 and is fixed to the drive gear 14. The drive gear 14 meshes with the driven gear 11. The limit sleeve 12 is rotatably connected to the inner wall of the support plate 1, and the lifting rod 5 is slidably connected to the limit sleeve 12. The lifting rod 5 has a square structure design. A second electric motor is fixed to the lower end of the support plate 1. The push rod 15, and the second electric push rod 15 is suspended by an "L"-shaped fixing bracket. The upper end of the second electric push rod 15 is fixed with a transmission plate 16, and the right side of the transmission plate 16 is rotatably connected to the lifting rod 5. The drive gear 14 can be driven to rotate by the power motor 13. The drive gear 14 and the driven gear 11 cooperate to drive the limiting sleeve 12 and the lifting rod 5 to rotate synchronously, which can realize the rotation and transfer position of the pipette. At the same time, since the pipette needs to be upgraded when aspirating and discharging liquid, the second electric push rod 15 can be used to push the transmission plate 16 to move, and the transmission plate 16 can be used to drive the lifting rod 5 to rise and fall. The transmission plate 16 and the lifting rod 5 are rotatably connected to avoid motion interference.

[0033] The weighing module 3 is provided with support frames 17 on both sides, and the upper end of the support frame 17 is connected to the absorbent sponge 18. The support frame 17 is designed in an "L" shape and is symmetrically distributed on both sides of the measuring cup 4. The support frame 17 is used to fix the absorbent sponge 18. When the pipette rotates and moves to the middle of the two sets of absorbent sponges 18, it can absorb the residual liquid attached to the outer wall of the lower pipette head, so as to avoid affecting the calibration accuracy.

[0034] This completes a series of tasks. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0035] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pipette volume calibration device, comprising a support plate (1) and a liquid storage cup (2) disposed on the upper left side, a weighing module (3) disposed on the upper right side of the support plate (1), and a measuring cup (4) placed on the upper end of the weighing module (3), characterized in that: A lifting rod (5) runs through the middle of the support plate (1), and a support rod (6) is fixed at the upper end of the lifting rod (5). A hole is opened on the left side of the support rod (6), and a clamping block (7) is set inside the hole. The support plate (1) is rotatably equipped with a driven gear (11), and a limit sleeve (12) is fixed at the upper end of the driven gear (11). The lifting rod (5) passes through the limit sleeve (12). A power motor (13) is fixed at the lower right end of the support plate (1), and a drive gear (14) is connected to the upper shaft end of the power motor (13). The weighing module (3) is provided with support frames (17) on both sides, and the upper end of the support frame (17) is connected to an absorbent sponge (18).

2. The pipette volume calibration device according to claim 1, characterized in that: The clamping block (7) is slidably connected to the inner wall of the hole. The left end of the support rod (6) is through a threaded rod (8), and the threaded rod (8) is rotatably connected to the support rod (6). The right end of the threaded rod (8) is threadedly connected to the clamping block (7).

3. The pipette volume calibration device according to claim 1, characterized in that: The support rod (6) has a first electric push rod (9) fixed to its left end, and a pressure plate (10) is fixed to its upper end, with the pressure plate (10) extending to the top of the hole on its left side.

4. The pipette volume calibration device according to claim 1, characterized in that: The drive gear (14) is located inside the support plate (1). The upper shaft of the power motor (13) extends into the support plate (1) and is fixed to the drive gear (14). The drive gear (14) meshes with the driven gear (11).

5. The pipette volume calibration device according to claim 1, characterized in that: The limiting sleeve (12) is rotatably connected to the inner wall of the support plate (1), and the lifting rod (5) is slidably connected to the limiting sleeve (12). The lifting rod (5) has a square structure design. The lower end of the support plate (1) is provided with a fixed second electric push rod (15), and the second electric push rod (15) is suspended by an "L"-shaped fixing frame. The upper end of the second electric push rod (15) is fixed with a transmission plate (16), and the right side of the transmission plate (16) is rotatably connected to the lifting rod (5).

6. The pipette volume calibration device according to claim 1, characterized in that: The support frame (17) is designed in an "L" shape and is symmetrically distributed on both sides of the measuring cup (4).

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