CN215860682U

CN215860682U - Totally-enclosed leakage-free compressor pressure balancing device

Info

Publication number: CN215860682U
Application number: CN202121291367.5U
Authority: CN
Inventors: 蒋纪刚; 孔维荣; 吴朝华; 徐晓梅; 杨娟
Original assignee: JIANGSU XIYA PETROCHEMICAL EQUIPMENT CO Ltd
Current assignee: JIANGSU XIYA PETROCHEMICAL EQUIPMENT CO Ltd
Priority date: 2021-06-10
Filing date: 2021-06-10
Publication date: 2022-02-18
Anticipated expiration: 2031-06-10

Abstract

The utility model provides a pressure balancing device of a totally-enclosed leakage-free compressor, which can reduce the influence of process gas on the performance of the compressor. The device comprises an isolation section, wherein the isolation section is positioned between a stuffing box and a guide bearing, the bottom of the stuffing box is respectively provided with a leakage gas collection port, and the leakage gas collection ports are respectively communicated with the bottom of an inner cavity of the stuffing box through first branch pipes; the air leakage collecting port is communicated with the main pipe through a vertical second branch pipe respectively; the balance pipe penetrates through a partition plate between the isolation section and the crankcase, an inlet of the balance pipe is communicated with the crankcase, an outlet of the balance pipe is communicated with the main pipe, a first check valve is arranged at the outlet, and a filling cylinder is arranged at the inlet.

Description

Totally-enclosed leakage-free compressor pressure balancing device

Technical Field

The utility model belongs to the field of compressors, and particularly relates to pressure balance of a compressor.

Background

The process gas medium often contains components such as C4 and water vapor, and the components have dilution effect on lubricating oil and influence the lubrication of moving parts of the compressor. Depending on the chemistry of the process gas, a buffer gas is used to protect personnel and equipment. Inert gas or nitrogen or, in special cases, some dry clean suitable component of the process gas is used.

During normal operation of the compressor, the isolation section (the area between the piston rod stuffing box and the guide bearing) is slightly pressurized (slightly higher than the inlet pressure of the first stage of the compressor) by the buffer gas. It is avoided that process gases enter the crankcase, which otherwise might change the viscosity of the lubricating oil or might form corrosive or explosive gases in the isolating section or the crankcase. However, the entry of buffer gas may cause a pressure imbalance between the isolation section and the crankcase, causing oil gas in the crankcase to enter the isolation section and contaminate the process gas. .

Disclosure of Invention

In order to prevent the process gas from entering the crankcase and prevent the oil gas in the crankcase from entering the isolation section, the utility model provides a totally-enclosed leakage-free compressor pressure balancing device which can reduce the influence of the process gas on the performance of the compressor.

In order to achieve the purpose, the utility model is realized by the following technical scheme:

the utility model provides a totally closed no leakage compressor pressure equaliser, its includes the isolated section, the isolated section is located between stuffing box and the guide bearing, its characterized in that: the bottom of the stuffing box is respectively provided with a leakage gas collecting port which is respectively communicated with the bottom of the inner cavity of the stuffing box through a first branch pipe; the air leakage collecting port is communicated with the main pipe through a vertical second branch pipe respectively; the balance pipe penetrates through a partition plate between the isolation section and the crankcase, an inlet of the balance pipe is communicated with the crankcase, an outlet of the balance pipe is communicated with the main pipe, a first check valve is arranged at the outlet, and a filling cylinder is arranged at the inlet.

It is further characterized in that:

the gas outlet side of the main pipe is sequentially provided with a reducing pipe, a second check valve and a ball valve along the gas outlet sequence;

the balance pipe is characterized by also comprising an arc-shaped bent pipe, wherein one end of the bottom of the bent pipe is communicated with the outlet of the balance pipe, and the other end of the bottom of the bent pipe is communicated with the main pipe;

the packing cylinder is arranged at the bottom of the partition plate, Raschig rings are densely distributed in the packing cylinder, one end of the packing cylinder is communicated with the inlet of the balance pipe, and the other end of the packing cylinder is communicated with the crankcase.

The utility model has the beneficial effects that: once the buffer gas in the isolation section is excessive, the buffer gas overflows to the bottom of the inner cavity of the stuffing box and then flows to the main pipe along the first branch pipe and the second branch pipe, and is discharged from the main pipe to the suction side to enter a compression cycle; the balance pipe is communicated with the main pipe and the crankcase, so that the pressure balance between the main pipe (namely the isolation section) and the crankcase is ensured, the first check valve ensures that gas only flows to the isolation section, and the packing cylinder prevents oil stains in the isolation section from entering the balance pipe; the arc-shaped bent pipe ensures that the gas entering the main pipe (the isolation section) from the balance pipe can enter the main pipe from top to bottom.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the stuffing box of the present invention;

FIG. 3 is a schematic view of the balance tube of the present invention;

in the figure: 1, isolating the section; 2, a stuffing box; 21 a leakage air collecting port; 22 a first branch pipe; 23 a second branch pipe; 3, guiding a bearing; 4 a crankcase; 41 a partition plate; 5, a main pipe; 51 a reducing pipe; 52 a second check valve; 53 ball valve; 6, a gas suction side; 7, a balance tube; 71 a first check valve; 72 a packing cylinder; 73 bent pipe.

Detailed Description

For the purpose of enhancing the understanding of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and examples, which are provided for the purpose of illustration only and are not intended to limit the scope of the present invention.

A totally-enclosed leakage-free compressor pressure balancing device comprises an isolation section 1, wherein the isolation section 1 is positioned between a stuffing box 2 and a guide bearing 3, the bottom of the stuffing box 2 is respectively provided with a leakage air collecting port 21, and the leakage air collecting ports 21 are respectively communicated with the bottom of an inner cavity of the stuffing box 2 through first branch pipes 22; the air leakage collecting device also comprises a transverse main pipe 5, wherein the main pipe 5 penetrates through the isolating section 1 and extends out of the cavity of the isolating section 1 to be communicated with the air suction side 6, and the air leakage collecting ports 21 are respectively communicated with the main pipe 5 through vertical second branch pipes 23; the device also comprises a balance pipe 7, wherein the balance pipe 7 penetrates through the partition plate 41 between the isolation section 1 and the crankcase 4, the inlet of the balance pipe 7 is communicated with the crankcase 4, the outlet of the balance pipe is communicated with the main pipe 5, the outlet of the balance pipe is provided with a first check valve 71, and the inlet of the balance pipe is provided with a packing cylinder 72.

The gas outlet side of the main pipe 5 is sequentially provided with a reducing pipe 51, a second check valve 52 and a ball valve 53 along the gas outlet sequence; the balance pipe also comprises an arc-shaped bent pipe 73, one end of the bottom of the bent pipe 73 is communicated with an outlet of the balance pipe 7, and the other end of the bottom of the bent pipe 73 is communicated with the main pipe 5; the packing cylinder 72 is arranged at the bottom of the partition plate 41, Raschig rings are densely distributed in the packing cylinder 72, one end of the packing cylinder 72 is communicated with the inlet of the balance pipe 7, and the other end of the packing cylinder 72 is communicated with the crankcase 4.

The utility model has the beneficial effects that: once the buffer gas in the isolation section 1 is excessive, the buffer gas overflows to the bottom of the inner cavity of the stuffing box 2, flows to the main pipe 5 along the first branch pipe 22 and the second branch pipe 23, is discharged from the main pipe 5 to the suction side 6, and enters a compression cycle; the balance pipe 7 is communicated with the main pipe 5 and the crankcase 4, so that the pressure balance between the main pipe 5 (namely the isolation section 1) and the crankcase 4 is ensured, the first check valve 71 ensures that gas only flows to the isolation section 1, and the packing cylinder 72 prevents oil stains in the isolation section 1 from entering the balance pipe 7; the curved elbow 73 ensures that gas and moisture entering the main pipe 5 (the isolation section 1) from the balance pipe 7 can enter the main pipe 5 from the top to the bottom, ensuring that moisture and the like can be discharged completely.

Claims

1. The utility model provides a totally closed no leakage compressor pressure equaliser, its includes the isolated section, the isolated section is located between stuffing box and the guide bearing, its characterized in that: the bottom of the stuffing box is respectively provided with a leakage gas collecting port which is respectively communicated with the bottom of the inner cavity of the stuffing box through a first branch pipe; the air leakage collecting port is communicated with the main pipe through a vertical second branch pipe respectively; the balance pipe penetrates through a partition plate between the isolation section and the crankcase, an inlet of the balance pipe is communicated with the crankcase, an outlet of the balance pipe is communicated with the main pipe, a first check valve is arranged at the outlet, and a filling cylinder is arranged at the inlet.

2. The pressure balancing device of the totally-enclosed leakless compressor as claimed in claim 1, wherein: the main pipe gas outlet side is provided with a reducing pipe, a second check valve and a ball valve in sequence along the gas outlet sequence.

3. The pressure balancing device of the totally-enclosed leakless compressor as claimed in claim 2, wherein: the balance pipe is characterized by further comprising an arc-shaped bent pipe, one end of the bottom of the bent pipe is communicated with the inlet of the balance pipe, and the other end of the bottom of the bent pipe is communicated with the main pipe.

4. The pressure balancing device of the totally-enclosed leakless compressor as claimed in claim 3, wherein: the packing cylinder is arranged at the bottom of the partition plate, Raschig rings are densely distributed in the packing cylinder, one end of the packing cylinder is communicated with the inlet of the balance pipe, and the other end of the packing cylinder is communicated with the crankcase.