Quick-closing hydraulic system of main steam isolation valve executing mechanism capable of automatically relieving pressure

• Main Authors: MOU YANG, DONG JUNCHENG, SUN GUOZHONG, PANG MING, WANG YOUYONG, LIU QIANG, LIU CHONGDU
• Format: Patent
• Language: English
• Published: 11.02.2015
• Subjects: BLASTING; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR; FLUID-PRESSURE ACTUATORS; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; HEATING; HYDRAULICS OR PNEUMATICS IN GENERAL; LIGHTING; MECHANICAL ENGINEERING; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; WEAPONS

The invention belongs to the technical field of two-loop main steam system pipeline design for a pressurized water reactor nuclear power plant and relates to a quick-closing hydraulic system of a main steam isolation valve executing mechanism capable of automatically relieving pressure. According to the technical scheme, an external pressure relieving module loop capable of automatically relieving pressure is arranged on an original quick-closing hydraulic system of the main steam isolation valve executing mechanism of the nuclear power plant; the quick-closing hydraulic system of the main steam isolation valve executing mechanism capable of automatically relieving pressure comprises a high-pressure port (8), a high-pressure adapter tube (9), a pressure relieving module shell (10), a spring type safety valve (12), a pressure relieving oil pipe (13) and an oil return port (14). The quick-closing hydraulic system of the main steam isolation valve executing mechanism capable of automatically relieving pressure has beneficial effect that the external pressure relieving module loop capable of automatically relieving pressure is arranged through an existing port of the main steam isolating valve executing mechanism, when the volume of the system is greatly expanded due to temperature increase, the surplus hydraulic volume is discharged to an oil tank (7) through the spring type safety valve (12) so as to meet the quick-closing oil quantity requirement and guarantee that the oil pressure in the hydraulic system is lower than or equal to a designed value of the system when the temperature is changed.