Device and method for maintaining vacuum degree of instrument analyzer
An instrument analysis and holding device technology, which is applied in the direction of electric fluid pressure control, etc., can solve the problems of pressure fluctuation stability performance degradation, unable to meet the requirements of instrument analyzers for voltage stabilization and vacuum, etc.
Active Publication Date: 2020-02-07
PETROCHINA CO LTD
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Problems solved by technology
[0004] However, the existing technology can only stabilize small-scale pressure fluctuations. When the pressure fluctuations of compressed air are large, the stability of pressure fluctuations will be reduced, which will not meet the vacuum stabilization requirements in instrument analyzers.
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[0049] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0050] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present invention and the above drawings are used to distinguish similar objects and not necessarily Describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances ...
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The invention provides a device and a method for maintaining the vacuum degree of an instrument analyzer. The device comprises a compressed air source, a compensation air path, a pneumatic vacuum pumpand the instrument analyzer; the compressed air source is connected with the pneumatic vacuum pump and used for providing power for the pneumatic vacuum pump; the pneumatic vacuum pump is connected with the instrument analyzer and is used for vacuumizing the instrument analyzer; the compensation air path is located between the compressed air source and the instrument analyzer and used for inputting a part of air in the compressed air source into the instrument analyzer so as to compensate the vacuum degree in the instrument analyzer, and the compensation air path is a flow-adjustable pipe; and the instrument analyzer is used for containing liquid to be analyzed. According to the invention, when the pressure of the compressed air source fluctuates, the vacuum degree in the instrument analyzer can still be kept stable.
Description
technical field [0001] The invention relates to the technical field of petroleum product analysis, in particular to a device and method for maintaining the vacuum degree of an instrument analyzer. Background technique [0002] Liquid oil is a kind of mixture, which needs to use distillation method to volatilize the components with specific boiling point. Usually, according to the principle of vacuum distillation, liquid oil can reduce the distillation temperature in a vacuum environment. Some online analysis instruments use this principle to The instrument analyzer performs vacuum treatment, so that the oil product can be analyzed in the vacuum environment of the instrument analyzer to realize low-temperature analysis, so as to reduce the coking and cracking of the oil product. [0003] At present, a pneumatic vacuum pump is usually used to evacuate the instrument analyzer. Pneumatic vacuum pumps are driven by compressed air. The compressed air at the installation site is u...
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Login to View More IPC IPC(8): G05D16/20
CPCG05D16/20
Inventor 赵力刘双明魏薇王树利周瑞彬张剑张美杰许新普李鹏德武奎贾存德祁磊
Owner PETROCHINA CO LTD