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Heparin pump

A technology of heparin pump and connecting block, which is applied in the field of heparin pump, can solve the problems of reduced reliability, difficult assembly, and high precision requirements for parts machining, and achieves the effects of reducing complexity, improving reliability and simple structure

Inactive Publication Date: 2014-06-04
GUANGZHOU JIHUA MEDICAL APP & INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. The structure is complex, there are many components, and the reliability is reduced
[0005] 2. High precision is required for machining parts, and assembly is difficult
[0006] 3. Difficult to realize blockage, empty liquid alarm and other functions
[0007] 4. Due to the use of gear transmission or belt transmission, it is difficult for the same heparin pump to realize the functions of slow injection of heparin and rapid injection at the same time

Method used

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Embodiment Construction

[0024] to combine figure 1 with figure 2 As shown, the present invention proposes a heparin pump with simple and reliable structure, blockage, empty liquid alarm, slow injection of heparin and rapid injection of heparin, which is used in conjunction with the syringe 2 .

[0025] Specifically, the heparin pump proposed by the present invention includes: a casing 23; a frame fixed in the casing 23 by screws, and the frame is composed of a motor mounting plate 15, a rear plate 21, a side plate 16 and a bottom plate 17; The motor transmission system on the top, the motor transmission system includes a stepper motor 4 and its control circuit board, screw mandrel 11 and lead screw nut 10, the stepper motor 4 is fixedly installed on the motor mounting plate 15 by a plurality of screws, and for the shaft Accurate positioning between the stepper motor 4 and the motor mounting plate 15 adopts a notch positioning connection structure, one end of the screw rod 11 is directly connected t...

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Abstract

The invention discloses a heparin pump. The heparin pump comprises a casing, a machine frame, a stepping motor, a control circuit board, a lead screw, a lead screw nut, a guide rail and a sliding block connection block, wherein the machine frame is fixed in the casing, the stepping motor and the control circuit board of the stepping motor are arranged on a motor installation plate of the machine frame, one tail end of the lead screw is directly connected with a driving shaft of the stepping motor, the other tail end of the lead screw is in supporting connection with a supporting sleeve, the lead screw nut is in threaded connection with the lead screw, the lead screw nut is fixed to the nut connection block, the guide rail is fixed to the side plate of the machine frame, and the sliding block connection block is arranged on the guide rail. A spring with preset pressure is compressed in an inner hole of the sliding block connection block by the nut connection block through an axial retainer ring, and one tail end of the sliding block connection block is fixedly connected with a push rod for directly pushing an injector matched with the heparin pump in use. The heparin pump is simple and reliable in structure and has the functions of blockage, empty liquid warning, fast heparin injection and slow heparin injection.

Description

technical field [0001] The invention relates to an automatic injection medical device, in particular to a heparin pump for blood purification. Background technique [0002] The heparin pump is an important part of the hemodialysis machine. The heparin pump is equivalent to a clinically used micro-injection pump, which is used to continuously inject heparin into the patient's blood. During the dialysis process, the blood is in contact with the air in the extracorporeal circulation, which is prone to coagulation, and heparin is used to prevent coagulation. Among them, heparin is a commonly used anticoagulant in clinical practice, which can prevent blood from coagulating in the extracorporeal pipeline. [0003] In recent years, with the rapid development of hemodialysis, the requirements for heparin pumps are getting higher and higher. At present, heparin pumps for blood purification are generally driven by gear transmission or belt transmission. The disadvantages of these tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M1/14A61M5/145
CPCA61M1/14A61M5/145A61M2205/18
Inventor 张力华刘赵生李武明陆喻
Owner GUANGZHOU JIHUA MEDICAL APP & INSTR
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