一种移液装置

Abstract

本实用新型公开一种移液装置，包括：移液固定座；移液驱动机构，其设于所述移液固定座上；活塞主体，其设于所述移液固定座上；所述活塞主体内设置有上下方向设置且穿透所述活塞主体上下表面的活塞腔；活塞，其插于所述活塞腔中；活塞杆，其在所述移液驱动机构的驱动下带动所述活塞上下运动；连接杆，其与所述活塞主体的下端连接，所述连接杆内设置有上下方向穿透所述连接杆上下表面的连接腔，所述连接腔与所述活塞腔相通；顶套，其套于所述连接杆上且可相对所述连接杆上下运动；顶杆机构，其与所述移液驱动机构连接和顶套连接，且可在所述移液驱动机构驱动下带动所述顶套相对所述连接杆上下运动。本实用新型可实现自动移液。

Claims

1. A pipetting device comprising a pipetting station, characterized in that: The pipetting device further includes: A pipetting drive mechanism is provided on the pipetting holder; A piston body is disposed on the pipetting holder; the piston body has a piston cavity arranged vertically and penetrating the upper and lower surfaces of the piston body. A piston, which is inserted into the piston chamber; A piston rod, which is connected to the piston and the pipetting drive mechanism, and drives the piston to move up and down under the drive of the pipetting drive mechanism; A connecting rod is connected to the lower end of the piston body. The connecting rod has a connecting cavity that penetrates the upper and lower surfaces of the connecting rod in a vertical direction and communicates with the piston cavity. A top sleeve, which is fitted onto the connecting rod and can move up and down relative to the connecting rod; The push rod mechanism is connected to the pipetting drive mechanism and the top sleeve, and can drive the top sleeve to move up and down relative to the connecting rod under the drive of the pipetting drive mechanism.

2. The pipetting device of claim 1, wherein: The piston body also has a push rod cavity arranged vertically and penetrating the upper and lower surfaces of the piston body, and the bottom of the push rod cavity has a push rod boss that tapers inward; the push rod mechanism includes: An upper push rod is connected to the pipetting drive mechanism. The upper push rod is inserted into the push rod cavity and moves up and down along the push rod cavity under the drive of the pipetting drive mechanism. The lower push rod has its lower end fixedly connected to the top sleeve, and its upper end is provided with an outwardly protruding push rod cap; the lower push rod is inserted into the push rod cavity, and the push rod cap is located above the push rod boss; A return spring is fitted onto the lower push rod and compressed between the push rod cap and the push rod boss; The pipetting drive mechanism drives the upper push rod to move downward along the push rod cavity, pressing against the lower push rod and causing the top sleeve to move downward; the pipetting drive mechanism drives the upper push rod to move upward along the push rod cavity, disengaging from the lower push rod, and the lower push rod moves upward under the action of the return spring, causing the top sleeve to return upward.

3. The pipetting device of claim 2, wherein: The pipetting drive mechanism includes: Pipetting drive motor; A pipetting screw, which is connected to the pipetting drive motor and rotates under the drive of the pipetting drive motor; A pipetting drive seat, which is fitted onto the pipetting screw and moves up and down under the drive of the pipetting screw; Both the piston rod and the upper push rod are fixedly connected to the pipetting drive seat.

4. The pipetting device of claim 3, wherein: The push rod chamber includes two parts, which are arranged opposite each other on both sides of the piston chamber; the upper push rod, the lower push rod, and the return spring each include two parts.

5. The pipetting device of claim 3, wherein: The pipetting device further includes: A sleeve is provided at the upper end of the piston body, the pipetting drive motor is fixed at the upper end of the sleeve, and the pipetting screw, pipetting drive seat, piston rod and upper push rod are all inserted into the sleeve.

6. The pipetting device of claim 5, wherein: The side of the casing is provided with a casing groove arranged in the vertical direction, and the side of the piston rod is provided with a limiting rod that can move up and down with the piston rod, and the limiting rod is inserted into the casing groove.

7. The pipetting device of claim 1, wherein: The piston body is also provided with a detection hole on its side that communicates with the connecting cavity, and the pipetting device also includes a pressure sensor inserted into the detection hole.

8. The pipetting device of claim 1, wherein: The lower end of the connecting rod is a frustum shape, wider at the top and narrower at the bottom.

9. The pipetting device of claim 1, wherein: The pipetting device further includes: The cover hook is located on the side of the main body.

10. The pipetting device of claim 1, wherein: The pipetting device further comprises: a rack; a device driving mechanism arranged on the rack, the pipetting fixed seat being connected with the device driving mechanism and being capable of moving in front and back, left and right, and up and down directions under the driving of the device driving mechanism.

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