A stable high-pressure medical pump

Abstract

The invention discloses a stable high-pressure medical pump. The stable high-pressure medical pump comprises a pump body, a liquid inlet pipe and a liquid outlet pipe; a first piston cylinder and a second piston cylinder are arranged in the pump body; a first liquid inlet channel and a first liquid discharge channel communicates with an inner cavity of the first piston cylinder; a second liquid inlet channel and a second liquid discharge channel communicates with an inner cavity of the second piston cylinder; the liquid inlet pipe is respectively connected with the first liquid inlet channel and the second liquid inlet channel, and is provided with one-way valves on the first liquid inlet channel and the second liquid inlet channel; a switching valve is arranged on the pump body; the liquid outlet pipe can communicate with the first liquid discharge channel or the second liquid discharge channel through the switching valve; and pistons and piston rods are respectively mounted in the first piston cylinder and the second piston cylinder. The stable high-pressure medical pump comprises two piston cylinders, uses an asynchronous continuous pressing mode of double pistons to realize reciprocating motions of the double pistons, matches with the one-way valves and the switching valve to realize no-gap continuous high pressure, overcomes the fluctuation problem of a water jet scalpel, and keeps excellent cutting performance of the water jet scalpel under constant pressure.

Description

technical field [0001] The invention is used in the technical field of medical equipment, and in particular relates to a stable high-pressure medical pump. Background technique [0002] In water cutting technology, high-pressure pump is one of the core parts of medical water jet design, and commonly used standard parts such as plunger pump are often used. In the existing medical high-pressure pump, when the liquid enters the plunger pump for pressurization, one end enters the water through the one-way water inlet valve, and after pressurization, it is pushed out from the other end, and enters the high-pressure pipeline through the water outlet one-way valve, and the reciprocating movement of the piston , forming a continuous high-pressure water flow. But this kind of high-pressure pump has a reversing cycle due to the piston movement, and the output water flow pressure also forms periodic fluctuations, so it is often necessary to install a high-pressure accumulator to stabi...

AI Technical Summary

Problems solved by technology

However, this kind of high-pressure pump has a reversing cycle due to the piston movement, and the output water pressure also forms periodic fluctuations, so it is often necessary to install an additional high-pressure accumulator to stabilize the pressure.

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