Self reset pressure relief valve for hemodialysis

Abstract

The invention discloses a self reset pressure relief valve for hemodialysis. An upper chamber and a lower chamber of the lower valve are communicated by a small hole in which a fixing cup is installed, the lower end of the fixing cup is embedded into an inner cavity of a fixing base; a shaft pin is penetrated through a center hole of the fixing cup, the shaft head of the shaft pin can block off the center hole of the fixing cup, a second spring is sleeved on the shaft pin, the upper end of the shaft pin is abutted against the lower end of a fixing block, the upper end of the fixing block is abutted against the lower end of a first spring; and a ring groove is arranged in the middle of the fixing block, and a diaphragm is installed in the ring groove. The self reset pressure relief valve for hemodialysis has good biological performance and can not rust, thus effectively avoiding medical fluid contamination; and the springs are used to substitute a rubber diaphragm for reset and sealing, high reliability of pressure relief can also be ensured after long-time use, and the defect of noise generated due to resonance of a traditional structure is eliminated.

Description

[0001] Technical field [0002] The invention belongs to the technical field of hemodialysis, and specifically relates to a self-resetting pressure reducing valve for hemodialysis. Background technique [0003] The pressure reducing valve is an important part of the hemodialysis machine, which plays the role of regulating and controlling the pressure of the pipeline. At present, the pressure reducing valve used on the hemodialysis machine is generally composed of a valve body and a valve core assembly. The disadvantages are: [0004] 1) The valve body is usually made of metal, which is easy to rust or contaminate the medical fluid due to the precipitation of metal ions. [0005] 2) The rubber diaphragm is usually reset and sealed. The rubber diaphragm is easy to age, and the inelastic rubber diaphragm will reduce the reliability of the pressure reducing valve. [0006] 3) The reliability of the sealing ring at the inlet of the valve body is poor, and the sealing is prone to be poor, a...

AI Technical Summary

Problems solved by technology

[0004] 1) The valve body is usually made of metal, which is easy to rust or pollute the medical fluid due to the precipitation of metal ions

[0005] 2) The rubber diaphragm is usually used to reset and seal. The rubber diaphragm is easy to age, and the inelasticity of the rubber diaphragm will reduce the reliability of the pressure reducing valve.

[0006] 3) The reliability of the sealing ring at the inlet of the valve body is poor, and it is prone to poor sealing, and occasionally the decompression effect is not good, or the noise is loud due to resonance with the inlet liquid

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