Injection pump

Abstract

The invention discloses an injection pump which comprises a push injection head, a driving sleeve and as well as a pressure detection device, wherein the driving sleeve is used for connecting an injection pump transmission mechanism with the push injection head; the push injection head is connected with an injector push head; the pressure detection device is connected with the tip inside the push injection head; and the pressure detection device is used for detecting the pressure inside an injection pipeline by detecting the pressure at the tip. In the detection mode, a pressure acquisition point is not far away from a pressure generation point, and the tip part of the pressure acquisition point does not directly contact with the transmission mechanism, so that no abrasion is caused, and the real-time pressure in the injection pipeline can be detected more accurately and in time.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to a syringe pump. Background technique [0002] The principle of the syringe pump is to give driving pulses through the microprocessor to control the running speed of the stepping motor, and then drive the mechanical device connected to the motor to push the syringe to achieve high-precision and stable liquid transmission. Syringe pumps should be used for this purpose when clinically used drugs must be infused intravenously, and when the dose must be very precise, small in total, slow or constant over a long period of time. A common syringe pump is composed of a stepping motor and its driver, a screw rod, a nut and a bracket, etc. It has a reciprocating screw nut and a rotating screw. The screw nut is connected to the piston of the syringe, and the syringe contains the liquid medicine. When working, the single-chip microcomputer system sends out control pulses to make the steppe...

AI Technical Summary

Problems solved by technology

The above-mentioned pressure collection method is relatively simple to install, the electrical wiring is also more convenient, and the integration with the whole machine is also good, but its defect is that the pressure collection point is far away from the actual pressure generation point, and its transmission process is affected by the lead screw 102, The influence of different dynamic friction forces of moving parts such as the guide rail 104 and the drive sleeve 101 at different positions makes it impossible to directly, accurately and timely reflect the real-time pressure in the injection pipeline 106, and the contact of the pressure sensor 107 cannot be avoided. There is direct or indirect contact with the rotating screw 102, resulting in wear of the parts at the pressure collection point, which will affect the accuracy of pressure collection after long-term use

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