Positive pressure protection system for machine body of labyrinth compressor
By designing a series safety valve bypass and solenoid valve in the maze compressor, the zero-leakage gas recycling and automatic pressure control of the maze compressor body is achieved, and the problems of waste of resources and pressure instability of traditional maze compressors are solved, and the stability and automation level of the system are improved.
Patent Information
- Application Number
- CN202422285234.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-09-19
AI Technical Summary
The closed fuselage of traditional maze compressors has problems of wasted resources and unstable pressure control when the purge gas passes through the torch, and there is a lack of an effective positive pressure protection system.
A positive pressure protection system for the body of the maze compressor is designed. By setting a safety valve bypass and solenoid valve in series, the gas recycling with zero leakage is realized, and the valve opening is controlled through a pressure differential transmitter to ensure that the pressure in the fuselage is directly connected with the cylinder pressure and avoid manual adjustment.
The zero-leakage gas recycling of the maze compressor fuselage is realized, avoiding unnecessary waste of resources, and the pressure in the fuselage is directly related to the cylinder pressure, improving the stability of the system and automated control capabilities.
Smart Images
Figure CN223152245U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an improved invention of a labyrinth compressor, in particular to an improved invention of a positive pressure protection system for the body of a labyrinth compressor. Background Art
[0002] Labyrinth compressors are mainly divided into two categories, namely "open type" and "closed type", according to the compression medium. Among them, the "closed type" is further divided into positive pressure, pressure resistance, etc. When the "closed type" structure is adopted, the body needs to be designed as a pressure-bearing structure and is provided with a safety valve for protection.
[0003] For the closed body of a traditional labyrinth compressor, the purge gas is directly connected to the flare, and the pressure is basically controlled by the flare pressure or valve regulation, and there is no mutual connection with the cylinder pressure. Moreover, the direct connection of the purge gas to the flare is a waste of resources. Content of the Utility Model
[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a positive pressure protection system for the body of a labyrinth compressor.
[0005] To solve the above technical problem, the utility model is implemented by adopting the following technical scheme: The positive pressure protection system for the body of a labyrinth compressor includes a compressor and a flare. The compressor includes a body, a connecting barrel and a cylinder. It is characterized in that: the vent pipeline of the connecting barrel is connected to the flare, and a safety valve and its bypass are provided in front of the flare. A first NC-type solenoid valve is provided on the bypass. The drain pipeline of the connecting barrel is connected to a liquid collection tank, and a first NO-type solenoid valve is provided on the drain pipeline. The exhaust pipeline of the liquid collection tank is connected to the vent pipeline of the connecting barrel, and a second NO-type solenoid valve is provided on the exhaust pipeline. The vent pipeline of the body is connected to a high point outside, and a second NC-type solenoid valve is provided on the vent pipeline of the body. The vent pipeline of the connecting barrel is connected to the vent pipeline of the body in front of the second NC-type solenoid valve through a first branch, and a third NC-type solenoid valve is provided on the first branch; A nitrogen pipeline and a gas source are connected between the body and the connecting barrel. The gas source is equipped with a valve, and a fourth NC-type solenoid valve is provided in front of the body; The gas leaking from the cylinder to the body side through the packing is connected to the nitrogen pipeline through a return line, and a differential pressure transmitter is provided on the return line. The differential pressure transmitter is connected to the control of the gas source valve.
[0006] The liquid collection tank is equipped with a pressure gauge and a liquid level gauge.
[0007] The third NC-type solenoid valve is a manual control valve for nitrogen purging before startup.
[0008] The second NC-type solenoid valve is a manual control valve for nitrogen purging before maintenance.
[0009] The beneficial effects of the present utility model are as follows: for the improved positive pressure protection system of the labyrinth compressor body, as long as the safety valve does not trip, the purge gas cannot be transported to the flare, and it is basically zero leakage. When the system is under maintenance, the safety valve bypass is opened to discharge the purge gas; the pressure leaking from the cylinder to the body side through the packing returns to the compressor inlet through the return line for reuse, avoiding unnecessary emissions; a differential pressure transmitter is provided to control the valve opening (the intake volume of the purge gas), and the pressure inside the body is directly related to the pressure in the cylinder, eliminating the need for continuous manual adjustment due to reasons such as packing wear or failure. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] The following further details the specific embodiments of the present utility model in conjunction with the drawings.
[0011] Figure 1 It is a system schematic diagram of the present utility model. SPECIFIC EMBODIMENTS
[0012] The drawings show the structure of the present utility model, and the following further explains its relevant details in conjunction with the drawings. In this embodiment, referring to the attached Figure 1 , the positive pressure protection system of the labyrinth compressor body includes a compressor 1 and a flare 2. The compressor 1 includes a body 11, a connecting barrel 12, and a cylinder 13. The vent pipeline 3 of the connecting barrel 12 is connected to the flare 2, and a safety valve 31 and its bypass are provided in front of the flare 2. A first NC-type solenoid valve 32 is provided on the bypass, changing the setting of the safety valve 31 from the traditional parallel connection to a series connection. As long as the safety valve 31 does not trip, the purge gas cannot be transported to the flare 2, and it is basically zero leakage. When the system is under maintenance, the safety valve 31 bypass is opened to discharge the purge gas; the drain pipeline 4 of the connecting barrel 12 is connected to a liquid collection tank 5. A first NO-type solenoid valve 41 is provided on the drain pipeline 4. The exhaust pipeline 6 of the liquid collection tank 5 is connected to the vent pipeline 3 of the connecting barrel 12, and a second NO-type solenoid valve 61 is provided on the exhaust pipeline 6. The vent pipeline 7 of the body 11 is connected to an external high point, and a second NC-type solenoid valve 71 is provided on the vent pipeline 7 of the body 11. The vent pipeline 3 of the connecting barrel 12 is connected to the vent pipeline 7 of the body 11 in front of the second NC-type solenoid valve 71 through a first branch 8, and a third NC-type solenoid valve 81 is provided on the first branch 8; a nitrogen pipeline 9 and a gas source 91 are connected between the body 11 and the connecting barrel 12. The gas source 91 is equipped with a valve 92, and a fourth NC-type solenoid valve 93 is provided in front of the body 11. The opening and closing of the fourth NC-type solenoid valve 93 control the purge gas intake of the body 11; the gas leaking from the cylinder 13 to the body 11 side through the packing is connected to the nitrogen pipeline 9 through a return line 10, and a differential pressure transmitter 101 is provided on the return line 10. The differential pressure transmitter 101 is connected to control the gas source valve 92, and the differential pressure transmitter 101 controls the valve opening (the intake volume of the purge gas). The pressure inside the body 11 is directly related to the pressure in the cylinder 13, eliminating the need for continuous manual adjustment due to reasons such as packing wear or failure.
[0013] As a specific implementation of a further improvement, the liquid collection tank 5 is equipped with a pressure gauge 51 and a liquid level gauge 52 to monitor the pressure and liquid level in the liquid collection tank 5.
[0014] As a specific implementation of a further improvement, the third NC type solenoid valve 81 is a manual control valve for nitrogen purging before startup. After this valve is opened, the vent pipeline of the fuselage 11 is connected to a high point outside.
[0015] As a specific implementation of a further improvement, the second NC type solenoid valve 71 is a manual control valve for nitrogen purging before maintenance. After this valve is opened, the vent pipeline of the adapter 12 is connected to a high point outside. Correspondingly, the third NC type solenoid valve 81 is opened and the first NC type solenoid valve 32 is closed.
[0016] In summary, the above are only the preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A positive pressure protection system for the body of a labyrinth compressor, comprising a compressor and a flare. The compressor includes a body, a connecting barrel, and a cylinder, and is characterized in that: The vent pipeline of the adapter is connected to the flare, and a safety valve and its bypass are provided in front of the flare. A first NC-type solenoid valve is provided on the bypass, and a first NO-type solenoid valve is provided on the drain pipeline of the adapter. The drain pipeline of the adapter is connected to a liquid collection tank, and a second NO-type solenoid valve is provided on the exhaust pipeline of the liquid collection tank. The exhaust pipeline of the liquid collection tank is connected to the vent pipeline of the adapter, and the vent pipeline of the fuselage is connected to a high point outside the fuselage, and a second NC-type solenoid valve is provided on the vent pipeline of the fuselage. The vent pipeline of the adapter is connected to the vent pipeline of the fuselage in front of the second NC-type solenoid valve through a first branch, and a third NC-type solenoid valve is provided on the first branch; the fuselage and the adapter are connected with a nitrogen pipeline and a gas source, and the gas source is equipped with a valve, and a fourth NC-type solenoid valve is provided in front of the fuselage; the gas leaking from the cylinder to the fuselage side through the packing is connected to the nitrogen pipeline through a return line, and a differential pressure transmitter is provided on the return line, and the differential pressure transmitter is connected to the control of the gas source valve.
2. The positive pressure protection system for the body of a labyrinth compressor according to claim 1, wherein: The liquid collection tank is equipped with a pressure gauge and a liquid level gauge.
3. The positive pressure protection system for the body of a labyrinth compressor according to claim 1, wherein: The third NC-type solenoid valve is a manual control valve for nitrogen purging before startup.
4. The positive pressure protection system for the body of the labyrinth compressor according to claim 1, characterized in that: The second NC-type solenoid valve is a manual control valve for nitrogen purging before maintenance.