Low temperature molecular sieve adsorption pump device

Abstract

The invention belongs to the technical field of vacuum pumps and particularly relates to a low-temperature molecular sieve adsorption pump device. The device structurally and mainly comprises a mechanical pump, a corrugated pipe, a low-temperature molecular sieve adsorption pump, a vacuum pipeline, a resistor / ionization compound type vacuum gauge and a compound type vacuum gauge controller, wherein the mechanical pump is connected with the vacuum pipeline by the corrugated pipe; the low-temperature molecular sieve adsorption pump is connected with the vacuum pipeline; the resistor / ionization compound type vacuum gauge is connected with the vacuum pipeline and is connected with the compound type vacuum gauge controller. The low-temperature molecular sieve adsorption pump comprises a low-temperature adsorption pump cavity and a liquid nitrogen dewar. The low-temperature molecular sieve adsorption pump device has the advantages that when powdery raw materials are prepared, the low-temperature molecular sieve adsorption pump is combined with the front-grade mechanical pump so as to meet the requirements of a powdery sample on high vacuum in the exhausting and sealing process; a high-vacuum state can be continuously obtained for a long time; the loss is small when the powdery sample is exhausted, the service life is prolonged and the application cost is reduced; the low-temperature molecular sieve adsorption pump device can be used under any working environment, the working limit is high and the operation is convenient.

Description

technical field [0001] The invention belongs to the technical field of vacuum pumps, and in particular relates to a low-temperature adsorption pump device, in particular to a vacuum pump group which relies on molecular sieves for physical cooling and adsorption to realize air extraction. The invention is mainly applied to the harsh environment where vacuum pumping and sealing of powder raw materials is required when powder samples are prepared. Background technique [0002] In the process of sample synthesis and preparation, the scientific research team of the present invention often involves vacuum pumping and sealing the configured powder raw materials, and then placing the sealed raw materials in a set temperature environment for reaction growth. This kind of sealing in the early stage of sample growth requires a higher degree of vacuum than the ultimate vacuum of the mechanical pump (10 -1 Pa level), so it cannot be achieved by purely using mechanical pumps. Although t...

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Problems solved by technology

This kind of sealing in the early stage of sample growth requires a higher degree of vacuum than the ultimate vacuum of the mechanical pump (10 -1 Pa level), so it cannot be achieved by purely using mechanical pumps

Although there are many kinds of pump sets used for obtaining high vacuum in the market, they are relatively complete in terms of structure and function; however, these vacuum pump set systems generally use molecular pumps as high vacuum pumping, which is very important in the preparation of conventional raw materials, especially in the preparation of Powder raw materials are subject to great restrictions: 1. Molecular pumps are severely depleted when pumping powder samples, which greatly reduces their life and increases application costs; 2. Use other ion pumps, condensate pumps and other high vacuum pumps in this When used in harsh environments, it is easy to reach the working limit and reduce its service life, which brings great inconvenience to scientific research work

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