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Metering pump

The technology of a metering pump and pump body is applied in the field of diaphragm metering pumps for dialysis machines, which can solve the leakage or backflow at the one-way valve, affect the precise control of the liquid inhalation and discharge by the device, and affect the treatment effect of the dialysis machine. And other issues

Inactive Publication Date: 2013-08-14
贝恩医疗设备(广州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Metering pumps in the prior art usually use a check valve to control the input and outflow of liquid in the pump. Since there is a threshold value for the pressure when the check valve is opened and closed, only when the liquid pressure is greater than the threshold Only when the liquid pressure is less than the threshold value of the one-way valve, there will be liquid leakage or backflow at the one-way valve, which will eventually affect the precise control of the entire device on the liquid suction and discharge, thus affecting the therapeutic effect of the dialysis machine

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A metering pump such as Figure 1 to Figure 3 As shown, a pump body 100, a frame 200, a driving mechanism, a transmission mechanism and a control mechanism are provided. The frame 200 is used to support and place other components. The driving mechanism, transmission mechanism and control mechanism are all assembled on the frame 200 , and the pump body 100 is fixedly connected to the frame 200 .

[0051] The pump body 100 is provided with a valve cavity, an elastic diaphragm disposed in the valve cavity, and a solenoid valve 110 for controlling the input and discharge of liquid in the flow channel. Specifically, the pump body 100 is provided with a liquid inlet 120 and a liquid discharge port 130, and the solenoid valve 110 includes a liquid inlet solenoid valve 111 capable of controlling liquid inlet and a liquid discharge solenoid valve 112 capable of controlling liquid discharge. The liquid inlet 120 is connected to the liquid inlet solenoid valve 111 through a hose,...

Embodiment 2

[0077] A metering pump, the other structure is the same as that of Embodiment 1, the difference is that the pump body adopts a solenoid valve part with two solenoid valves assembled together, and the two solenoid valves of the solenoid valve part respectively control the liquid inlet channel , The opening and closing of the drainage channel.

[0078] The metering pump starts to work when the driving motor starts to work, and the motor shaft drives the eccentric wheel and the rotor disk to rotate together. Among them, the eccentric wheel drives the transmission shaft connected to it to perform periodic circular motion, thereby driving the elastic diaphragm to move back and forth in the valve cavity to generate pressure and suction for the liquid in the pipeline.

[0079] At the same time, the two cams of the rotor disc rotate sequentially through the signal sensor, and the signal sensor sends the obtained waveform information to the processing unit, and the processing unit judg...

Embodiment 3

[0083] A metering pump such as Figure 5 to Figure 9 As shown, the other structures are the same as in Embodiment 1, except that the characteristic unit used in the metering pump is changed from a rotor disc to a transversely moving induction piece 800, and the induction piece is provided with a first notch 810 and a second notch 820 , the length H of the first notch 810 is less than the length L of the second notch 820, and the distance S between the first notch 810 and the second notch 820 is less than the distance that the elastic diaphragm moves in one direction under the driving of the transmission shaft, as Figure 9 shown. The induction sheet 800 is fixedly disposed on the transmission shaft 420 .

[0084] The detection unit is configured as a position sensor 610 , and the position sensor 610 is fixedly disposed on the frame 200 . The sensing chip 800 is located between the sending end 611 and the receiving end 612 . When the transmission shaft 420 moves left and rig...

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PUM

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Abstract

A metering pump is provided with a pump body, a frame, a driving motor, a transmission mechanism and a control mechanism. The pump body which is fixedly connected with the frame is provided with a valve chamber, an elastic membrane piece and an electromagnetic valve; two ends of the transmission mechanism are connected with the driving mechanism and the elastic membrane piece; the control mechanism is provided with a characterization unit, a detection unit and a processing unit; the detection unit is connected with the characterization unit and the processing unit; an output terminal of the processing unit is connected with the electromagnetic valve; the transmission mechanism is provided with an eccentric wheel and a transmission shaft; the eccentric wheel is fixedly assembled on a motor shaft of the driving motor; one end of the transmission shaft is fixedly connected with the elastic membrane piece and the other end of the transmission shaft is flexibly assembled on an eccentric shaft; and the characterization unit is arranged into a rotor disc or a sensor piece. The metering pump is high in precision and can accurately control the suction and discharge amount of dialysis fluid.

Description

technical field [0001] The invention relates to the technical field of medical equipment, in particular to a diaphragm metering pump for a dialysis machine. Background technique [0002] Hemodialysis is one of the most effective ways to treat various acute and chronic renal failure diseases. Through hemodialysis, the life span of patients can be appropriately prolonged. Hemodialysis technology has been relatively mature, and further improving the quality of hemodialysis has become one of the development directions for the treatment of patients with renal failure. [0003] Hemodialysis is usually carried out by using a dialysis machine, a dialyzer and corresponding connecting pipelines, and arterial blood and dialysate in the dialyzer enter the dialyzer respectively. The flow direction of the dialysate in the dialyzer is opposite to the flow direction of the blood. Under the action of the osmotic pressure and the pressure of the dialysate, the blood and the dialysate exchang...

Claims

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Application Information

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IPC IPC(8): A61M1/14F04B49/06F04B49/03F04B43/04
Inventor 蒋顺忠范江红夏武兵
Owner 贝恩医疗设备(广州)有限公司