Liquid nitrogen spraying beam flow and stability accurately controlled device

Abstract

A liquid nitrogen spraying beam flow and stability accurately controlled device comprises a liquid nitrogen storage tank, a flow pump and spraying nozzles; the nitrogen storage tank comprises an outer casing, an inner container and a cover body; the outer casing is sleeved outside the inner container; the upper ends of the inner container and the outer casing are connected together; the cover body is connected to the upper ends of the outer casing and the inner container; a vacuum layer is formed between the outer casing and the inner container; a pressure limiting valve, a pressure reducing valve, electromagnetic valves and a liquid nitrogen injecting opening which extends into the inner container are arranged on the cover body; the pressure reducing valve and the electromagnetic valve are connected through a connection pipe; a pump body of the flow pump is arranged inside the inner container of the liquid nitrogen storage tank; an electric motor of the flow pump is fixed at the top of the liquid nitrogen storage tank; the electric motor is connected with a pump shaft of the pump body; a liquid outlet of the pump body is connected with one ends of vacuum pipes; the other ends of the vacuum pipes are connected with one end of every branch pipeline which is arranged inside the cover body; connection positions are provided with the electromagnetic valves; and the other ends of the branch pipelines are connected with spraying nozzles. The liquid nitrogen spraying beam flow and stability accurately controlled device has the advantages of being large in liquid nitrogen storage amount, being capable of spontaneously working with a plurality of spraying nozzles, greatly reducing consumption in liquid nitrogen injection, improving the efficiency and improving the safety.

Description

technical field [0001] The invention relates to a device for precisely controlling the flow and stability of liquid nitrogen jets during liquid nitrogen treatment, and belongs to the technical field of liquid nitrogen jet flow and stability control. Background technique [0002] When cryotherapy is used in medicine, four factors play a decisive role in the process of freezing damage to target cells: the minimum freezing temperature, the speed of ice crystal formation in cells, the length of freezing time, and the number of freeze-thaw cycles. During cryotherapy, local temperature control is critical for the destruction and survival of target tissues. Generally, the temperature of the diseased tissue should reach -50°C-60°C to destroy the target tissue. The cryogenic treatment medium liquid nitrogen is widely used because of its low temperature characteristics of -166°C and abundant raw materials, but its too low temperature brings many practical difficulties in the actual u...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the inaccuracy and poor stability of the liquid nitrogen injection volume in the existing traditional injection treatment, the present invention provides a precise control device for liquid nitrogen injection flow and stability, which can realize Precise control and stability of the amount of liquid nitrogen ejection during cryotherapy ensures the safety of treatment and realizes refined treatment

Images