Reciprocating piston compressor

Abstract

The invention relates to a reciprocating piston compressor, comprising a feed gas admission pipeline and a feed gas vent pipeline, a nitrogen admission pipeline, a leakage gas recovering pipeline, a motor and a mainframe, wherein a mainframe body is provided with a crank connected with the motor and at least one connecting rod, and the mainframe body is provided with a mid body, a connecting body and an air cylinder through at least one crosshead sliding rail outside; the connecting body is internally provided with N groups of stuffing and a flange, wherein N is not less than 7 and not more than 12; a piston rod penetrates through the mid body, the flange and the N groups of stuffing and then the two ends of the piston rod are connected with a piston and a crosshead in the air cylinder; a vent end of the feed gas admission pipeline is connected with an admission end of the feed gas vent pipeline, the nitrogen admission pipeline penetrates through a mid body cavity and is communicated with a nitrogen inlet of a nitrogen channel; the leaked gas recovering pipeline penetrates the mid body cavity and is communicated with a nitrogen outlet of a recovering channel; a sealing gas channel is arranged along an axial direction of the flange and a corresponding stuffing box of each group of stuffing between a third group of stuffing or a fourth group of stuffing counted from inside to outside and an outermost group of stuffing; a gas inlet of the channel is arranged on the outer lateral face of the flange, and the air outlet is arranged in the inner side of a corresponding step cavity in the third or the fourth stuffing box; and the sealing gas admission pipeline penetrates through the mid body cavity and is communicated with the gas inlet of the channel. The reciprocating piston compressor has better sealing performance.

Description

technical field [0001] The invention relates to a compressor, in particular to a reciprocating piston compressor which has better sealing performance and can effectively prevent raw material gas from leaking out. Background technique [0002] At present, there is no suitable equipment in China to compress rare, valuable, toxic and harmful raw material gases, and the existing compressors with comparable displacement and working pressure are generally used to replace them. [0003] Existing reciprocating piston compressors include raw material gas intake pipelines, raw material gas exhaust pipelines, nitrogen gas intake pipelines, leakage gas recovery pipelines, motors, and a main engine. A crankshaft is installed on the main engine body, and the outer end of the crankshaft is connected to the motor. , there is at least one connecting rod on the crankshaft, at least one crosshead slideway is connected outside the fuselage, and the fuselage is provided with a middle body, a con...

AI Technical Summary

Problems solved by technology

[0007] Although the packing assembly can play a certain role in gas sealing, there is still a small amount of raw material gas that will inevitably leak out of the cylinder along the piston rod. First, it will cause waste of the gas and air pollution, and second, along with the leaked raw material Changes in gas pressure and temperature will produce irregular coatings on the piston rod, destroying the precision of the piston rod, causing the packing component to fail, and the compressor can only be forced to stop, which seriously affects the economic benefits of the user. At the same time, The leakage of some raw material gases (such as nickel carbonyl gas) will cause the workplace to be polluted by the gas or the toxic gas produced after its decomposition, which seriously threatens the personal safety and physical and mental health of operators.

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