Double-level ejector with adjustable nozzles

Abstract

The invention discloses a double-level ejector with adjustable nozzles. The double-level ejector with the adjustable nozzles comprises a first-level ejection component, a second-level ejection component, an adjusting component and an emergent component. The first-level ejection component is provided with a first cylinder cover, a first ejection piece and a first ejection cylinder with the two ends opened. The second-level ejection component is provided with a second cylinder cover, a second ejection piece and a second ejection cylinder with the two ends opened. The adjusting component is provided with an adjusting rod and two adjusting sleeves arranged on the adjusting rod in a sleeving manner. Protrusions are arranged on the peripheral walls of the adjusting sleeves. The adjusting rod is moved so as to make one adjusting sleeve and the protrusions embedded in the first cylinder cover in a matched manner or the adjusting rod is moved so as to make the other adjusting sleeve and the protrusions embedded in the second cylinder cover in a matched manner. The emergent component is provided with an emergent pipe, and the emergent pipe communicates with an opening in the other end of the second ejection cylinder. According to the double-level ejector with the adjustable nozzles, the nozzles can be replaced on the premise that the ejector does not need to be detached, and accordingly stability of the vacuum degree under the variable work condition running condition is guaranteed.

Description

technical field [0001] The invention relates to the field of liquid injection, in particular to a double-stage ejector with adjustable nozzles. Background technique [0002] Ejector, also known as injector and jet pump, is a device that uses fluid to transfer mass and energy. Due to its simple structure, no moving parts, reliable performance, economical operation, strong adaptability, low manufacturing and maintenance costs, and convenient maintenance, etc. With many advantages, it is widely used in power, metallurgy, petrochemical, mining machinery, light industry textile, construction, refrigeration and other fields. [0003] Most of the traditional injector structures are fixed, but in actual production practice, the operating conditions often change, which requires changing nozzles and throat combinations of different sizes to match the working conditions, that is, disassembling the injector multiple times, On the one hand, it takes time and effort to disassemble the in...

AI Technical Summary

Problems solved by technology

[0003] Most of the traditional injector structures are fixed, but in actual production practice, the operating conditions often change, which requires changing nozzles and throat combinations of different sizes to match the working conditions, that is, disassembling the injector multiple times, On the one hand, it is time-consuming and laborious to disassemble the injector, which greatly increases the cost. On the other hand, repeated disassembly of the injector will cause serious wear and shorten the service life; and when the process requires multi-point vacuum and multi-component injection, It is necessary to configure multiple jet pumps to achieve this, which will inevitably lead to an increase in space, energy consumption and investment costs

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