Pressure release valve for blood purification

Abstract

The invention discloses a pressure release valve for blood purification, which comprises an upper valve body and a lower valve body. The upper valve body and the lower valve body are connected by a fastening screw; a screw hole is formed on the top of the upper valve body; an adjusting screw is arranged inside the screw hole; and a secondary through hole is formed in the adjusting screw axially. A guide valve rod is arranged inside the secondary through hole; the lower end of the guide valve rod extends into a secondary counter bore on the lower part of the upper valve body; a mounting table is arranged at the lower end of the guide valve rod; a spring is sleeved on the guide valve rod; the lower end of the spring is propped against the upper end face of the mounting table; the mounting table is arranged on the upper part of a packing leather; the lower edge of the packing leather is fixed between a first-level counter bore of the secondary counter bore and a first annular lug boss; a cavity is formed between the lower surface of the packing leather and the upper surface of the lower valve body at the bottom of the first annular lug boss; and a liquid inlet pipe is communicated with the cavity to seal a liquid outlet. The pressure release valve for blood purification has the advantages of small volume, simple and reliable structure, material conservation, no fluid pollution, and good sealing effect.

Description

technical field [0001] The invention relates to a pressure device, in particular to a pressure relief valve for blood purification. Background technique [0002] The existing pressure relief valve for blood purification uses a metal material to make the valve body, and a spring, a movable rod and its sealing rubber ring are installed in the cavity of the valve body, and the sealing rubber ring is installed on the movable rod covered with a compression spring. Under the action of elastic force, the sealing rubber ring blocks the liquid inlet of the liquid inlet pipe of the pressure relief valve. When the pressure of the liquid in the container connected to the liquid inlet pipe of the valve body is too high, the liquid will be blocked in the liquid inlet through the liquid inlet pipe. The high-pressure liquid flows into the cavity of the pressure relief valve and flows out through the liquid outlet pipe to achieve the purpose of decompression. [0003] But the existing press...

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Problems solved by technology

[0003] But the existing pressure relief valve for blood purification, the valve body is made of metal material, which is easy to rust or produce metal ions to pollute the medical fluid. When the fluid flows into the pressure relief valve, the spring will be completely immersed in the fluid, and the spring will also Rust and the generation of metal ions pollute the fluid. In order to achieve the sealing effect, the existing pressure relief valve uses too many rubber seals, and the volume is large, the structure is complicated, and the production cost is high.

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