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Electro-hydraulic servo driving device and chromatographic equipment

A drive device, electro-hydraulic servo technology, applied in the direction of fluid pressure actuators, servo motors, mechanical equipment, etc., can solve the problems of unsteady pressure column, pressure jitter, difficulties, etc., to overcome the swelling of the medium and run smoothly , high resolution effect

Pending Publication Date: 2022-01-11
LISUI TECH SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing driving mechanisms are driven by pneumatic hydraulic pumps or motor screw drives. The disadvantages of pneumatic hydraulic pumps are: the column cannot be pressed smoothly and the compression speed cannot be controlled; there is pressure jitter in the process of column pressing; The requirements for continuity, uniformity, stability and tightness of the layer, especially the packing of large-diameter columns in industrial production scale, have considerable difficulties

Method used

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  • Electro-hydraulic servo driving device and chromatographic equipment
  • Electro-hydraulic servo driving device and chromatographic equipment
  • Electro-hydraulic servo driving device and chromatographic equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Such as figure 1 As shown, an electro-hydraulic servo pump drive device includes a servo drive mechanism 1, an oil cylinder 6 and an oil tank 7; the servo drive mechanism 1 includes a servo driver 11 and a servo motor 12, and the servo motor 12 is connected to the oil pump 3 through a coupling 2, so The inlet and outlet a of the oil pump 3 is connected to the inlet and outlet A of the oil cylinder 6 through the first pipeline 4, and the inlet and outlet b of the oil pump 3 is connected to the inlet and outlet B of the oil cylinder 6 through the second pipeline 5, wherein the inlet and outlet A communicate with the rodless chamber , the inlet and outlet B communicate with the rod cavity. The first outlet A of the oil tank 7 communicates with the second pipeline 5 through the oil outlet pipeline 27, and the oil outlet pipeline 27 is provided with a first valve 10 for controlling the on-off of the oil outlet pipeline 27. As preferably, the first valve 10 A one-way valve i...

Embodiment 2

[0058] Such as Figure 4 As shown, on the basis of the first embodiment above, a pressure maintaining oil circuit is provided. The pressure maintaining oil circuit includes a pressure maintaining pipeline 26, an air pump 14 and a third valve 13. One end of the pressure maintaining pipeline 26 is connected to the oil tank 7. The second outlet B is connected, and the other end is connected to the first pipeline 4 between the oil cylinder 6 and the second hydraulic lock 8. The pneumatic pump 14 and the third valve 13 are sequentially arranged on the pressure maintaining pipeline 26, and the pneumatic pump 14 On the side close to the oil tank 7 , the third valve 13 is close to the side of the first pipeline 4 .

[0059] Figure 4 The middle arrow indicates the flow direction of the oil circuit for replenishing hydraulic oil. The function of the pressure-holding oil circuit is to replenish the hydraulic oil. During the pressure process, when the pressure in the first pipeline 4 i...

Embodiment 3

[0061] Such as Figure 5 As shown, safety oil passages such as the first safety valve overflow oil passage, the second safety valve relief oil passage and the pre-pressure relief oil passage are provided on the basis of the first embodiment above, and the above safety oil passages can be set in the system One, two or three, set according to the needs of the system.

[0062] The function of the first safety valve overflow oil circuit: when the hydraulic oil in the first pipeline 4 exceeds the threshold set by the first overflow valve 15, the excess hydraulic oil can flow back to the oil tank 7 through the first overflow valve 15 . The first relief valve overflow oil circuit includes a first overflow valve 15 and a first overflow pipeline 36, one end of the first overflow pipeline 36 communicates with the oil return pipeline 18, and the other end is connected to the oil cylinder 6 and the second On the first pipeline 4 between the hydraulic locks 8, and communicate with the fi...

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Abstract

The invention provides an electro-hydraulic servo driving device and chromatographic equipment. The electro-hydraulic servo driving device is used for driving the chromatographic equipment, the electro-hydraulic servo driving device comprises a servo driving mechanism, an oil pump, an oil cylinder and an oil tank, a servo motor of the servo driving mechanism is connected with the oil pump, and the oil inlet and outlet direction of the oil pump is controlled through forward and reverse rotation of the servo motor. An inlet and outlet opening a of the oil pump is connected with an inlet and outlet opening A of the oil cylinder through a first pipeline, an inlet and outlet opening B of the oil pump is connected with an inlet and outlet opening B of the oil cylinder through a second pipeline, and a first inlet and outlet opening of the oil tank communicates with the second pipeline through an oil outlet pipeline. When the chromatographic equipment is pressed down and maintained, the servo motor rotates to control the oil pump to convey hydraulic oil in the oil tank and a rod cavity of the oil cylinder to a rodless cavity of the oil cylinder, so that a piston rod of the oil cylinder descends to drive a piston in the chromatographic equipment to press filler; and when the chromatographic equipment is lifted, the servo motor rotates reversely to lift the piston rod of the oil cylinder, and the piston in the chromatographic equipment is driven to be separated from the filler. The electro-hydraulic servo driving device and chromatographic equipment has the characteristics of stable operation, high column efficiency and high separation degree.

Description

technical field [0001] The invention relates to the technical field of biological chromatography purification equipment, in particular to an electro-hydraulic servo drive device and chromatography equipment. Background technique [0002] Biochromatographic purification equipment According to whether continuous pressure is applied to the piston during the separation process, the axial compression column is divided into two types: dynamic axial compression column and static axial compression column. For dynamic axial compression columns, a certain pressure is always applied to the piston to continuously compress the packing; for static axial compression columns, pressure is only applied to the piston intermittently to compress the packing intermittently. Both the dynamic axial compression column and the static axial compression column need to drive the oil cylinder through the driving mechanism to realize the action when the chromatographic filler is loaded and unloaded. Most...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B11/08F15B11/04F15B13/02F15B13/04F15B13/01B01D15/20
CPCF15B11/08F15B11/04F15B13/02F15B13/027F15B13/028F15B13/024F15B13/04F15B13/01B01D15/206F15B2211/20515F15B2211/6306
Inventor 周胜李维林
Owner LISUI TECH SUZHOU
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