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A bidirectional metering pump and liquid pumping method thereof

A technology for metering pumps and pump casings, applied in the field of bidirectional metering pumps and their pump fluids, can solve problems such as increasing the cost of hydraulic systems, achieve the effects of improving bidirectional metering accuracy, simplifying the driving structure, and overcoming the single direction of pump fluid

Active Publication Date: 2021-01-12
宁波海洛泵业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional single-plunger metering pump can only meter the pump fluid in one direction, and most of them need to cooperate with the reversing valve to work, which greatly increases the cost of the hydraulic system

Method used

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  • A bidirectional metering pump and liquid pumping method thereof
  • A bidirectional metering pump and liquid pumping method thereof
  • A bidirectional metering pump and liquid pumping method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 , 2 As shown in and 3, a two-way metering pump includes a pump housing 1, a piston rod 2, a switching plate 3, an electromagnet 4 and a piston drive assembly. The pump housing 1 is provided with a T-shaped flow channel. The T-shaped flow channel is composed of a connecting cavity 1-1, a piston cavity 1-2 and two unilateral flow channels 1-3. The inner ends of the piston chamber 1-2 and the two unilateral flow passages 1-3 are in communication with the connection chamber 1-1. The cross sections of the connecting cavity 1-1 and the two unilateral flow channels are all circular. The outer ends of the two unilateral flow channels 1-3 are respectively the two liquid ports of the bidirectional metering pump.

[0031] The piston rod 2 is arranged in the piston cavity 1-2, and forms a sliding pair with the piston cavity 1-2. The piston rod 2 is driven by a piston drive assembly. The piston drive assembly consists of a gear, rack and drive motor. The rack...

Embodiment 2

[0048] The difference between this embodiment and embodiment 1 is:

[0049]Damping valves are provided at the outer ends of the two unilateral flow channels 1-3. When the switching plate 3 is overturned, there is a short period of one-end communication between the two single-side flow channels 1-3. At this time, if there is a pressure difference between the two hydraulic components, it will cause part of the hydraulic medium to form a flow path under the action of the pressure difference during the turning over of the switching plate 3, reducing the pumping accuracy of the metering pump. The damping valve can prevent the rapid change of the flow rate of the hydraulic medium, and the turning process of the switching plate 3 is faster; therefore, setting the damping valve can significantly reduce the aforementioned flow conditions and effectively improve the pumping accuracy.

Embodiment 3

[0051] The difference between this embodiment and embodiment 1 is:

[0052] The outer ends of the two unilateral flow channels 1-3 are provided with electromagnetic on-off valves. In steps 2 and 4, the electromagnetic on-off valves are both closed. Therefore, the flow of hydraulic medium during the turning over of the switching plate 3 is avoided.

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Abstract

The invention discloses a metering pump and a liquid pumping method thereof. A traditional single-plunger metering pump can only realize single-direction metering liquid pumping, and mostly needs to be matched with an upper reversing valve to work. The bidirectional metering pump comprises a pump shell, a piston rod, a switching plate, electromagnets and a piston driving assembly, wherein a T-shaped flow channel is arranged in the pump shell; the T-shaped flow channel is composed of a connecting cavity, a piston cavity and two single-side flow channels; the inner ends of the piston cavity andthe two single-side flow channels communicate with the connecting cavity; a sliding pair is formed by the piston rod and the piston cavity and is driven by the piston driving assembly; adsorption blocks are arranged at the two ends of the switching plate; the two electromagnets are fixed to the pump shell and correspond to the two adsorption blocks in position; and the middle of the switching plate is hinged with the middle of the connecting cavity in the pump shell. According to the bidirectional metering pump and the method, bidirectional metering liquid pumping can be realized, and the defect that the pumping liquid of the single-plunger metering pump is single in direction in the prior art is overcome.

Description

technical field [0001] The invention belongs to the technical field of metering pumps, and in particular relates to a bidirectional metering pump and a liquid pumping method thereof. Background technique [0002] The traditional single-plunger metering pump can only meter the pump fluid in one direction, and most of them need to cooperate with the reversing valve to work, which greatly increases the cost of the hydraulic system. Therefore, it is of great significance to design a metering pump that can realize two-way metering pump liquid. Contents of the invention [0003] The object of the present invention is to provide a two-way metering pump and its liquid pumping method. [0004] The invention relates to a two-way metering pump, which comprises a pump shell, a piston rod, a switching plate, an electromagnet and a piston driving assembly. The pump casing is provided with a T-shaped flow channel. The T-shaped flow channel is composed of a connecting cavity, a piston ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B13/00F04B53/16F04B53/00F04B49/00F04B53/10F04B17/03
CPCF04B13/00F04B17/03F04B49/00F04B53/00F04B53/10F04B53/16
Inventor 张慧熙邵志龙马宝丽江霞叶霞王琦晖
Owner 宁波海洛泵业科技有限公司
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