Fluid equipment protection system
A technology for protection systems and fluid equipment, applied in mechanical equipment, components of pumping devices for elastic fluids, liquid fuel engines, etc., can solve problems such as poor reliability, many intermediate links, and protection failure, and reduce the possibility , the action time is advanced, and the effect of parking reversal is reduced
Active Publication Date: 2008-02-06
CHINA PETROCHEMICAL CORP +1
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Problems solved by technology
[0004] 1. For the protection system of the screw compressor unit, the signal obtained by the detection switch is sent to the indoor control system, and then the signal is sent by the indoor control system to control the solenoid valve. There are too many intermediate links and poor reliability.
This method will be affected by the detection switch, transmission line, control system, solenoid valve and control system power supply, and it is prone to failure of protection.
[0005] 2. For the outlet valve and return valve of the original system, especially the outlet valve, when a unit suddenly stops during operation, the outlet valve cannot be closed, so that part of the gas returns to the inlet through the shutdown unit, resulting in a single compressor The problem of poor load capacity; moreover, if the outlet valve closes by mistake, it will cause danger to the unit
Method used
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[0018] The preferred embodiments of the present invention described below are designed by taking the protection system of a positive displacement compressor as an example. However, those skilled in the art should understand that the protection system of the present invention can be widely used in various fluid equipment.
[0019] As shown in Figure 1, in the protection system according to the preferred embodiment of the present invention, the compressor trip main control solenoid valve 1, the mechanical flyweight trip mechanism 2 and the main steam quick-acting valve 3 are arranged in series in sequence through the pipeline, and the main A valve closing position detection switch 10 is installed on the steam quick action valve 3 . An indoor control system (not shown) can be set between the detection switch 10 and the two control valves 7 (solenoid valves in this embodiment) respectively controlling the outlet valve 8 and the return valve 9 of the compressor unit. Receive the s...
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The invention relates to a protective system of fluid device, which comprises a tripping device, a control valve (7) and a terminal valve. Wherein, said control valve (7), tripping device and the terminal valve are linked to control said terminal valve when said tripping device is not operated. The invention is characterized in that: it also comprises a fluid controller (6), whose two inputs are linked with tripping device and the control valve (7), and the output is linked with terminal valve. When said tripping device is operated, the fluid control device (6) controls the terminal valve first.
Description
technical field [0001] The invention relates to an operation protection technology for industrial fluid equipment, in particular to a protection system for a displacement compressor. Background technique [0002] In the chemical industry, various compressors are widely used. Most of these large units are powered by steam turbines. For the partial oxidation of acetylene process, the cracked gas is flammable, explosive and easy to block, so the screw compressor is the best choice. Since it is driven by a steam turbine, according to the requirements of the steam turbine, the protection for the mechanical failure of the steam turbine and the compressor is considered relatively complete, but for the system formed with the output equipment such as the compressor and the cooling tower, the protection exists as follows The problem: [0003] The screw compressor is a kind of volumetric compressor unit. Due to the characteristics of the volumetric compressor, the outlet pipeline of...
Claims
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IPC IPC(8): F04C29/00F04C18/16
Inventor 戴右铭
Owner CHINA PETROCHEMICAL CORP