CN104343753A - Quick-closing hydraulic system of main steam isolation valve executing mechanism capable of automatically relieving pressure - Google Patents
Quick-closing hydraulic system of main steam isolation valve executing mechanism capable of automatically relieving pressure Download PDFInfo
- Publication number
- CN104343753A CN104343753A CN201310322062.XA CN201310322062A CN104343753A CN 104343753 A CN104343753 A CN 104343753A CN 201310322062 A CN201310322062 A CN 201310322062A CN 104343753 A CN104343753 A CN 104343753A
- Authority
- CN
- China
- Prior art keywords
- pressure
- hydraulic system
- pressure release
- oil
- main steam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Safety Valves (AREA)
Abstract
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.
Description
Technical field
The invention belongs to PWR nuclear power plant secondary circuit main steam system piping design technical field, being specifically related to one can self-relieving main steam isolation valve actuator quick closing valve hydraulic system.
Background technique
According to the requirement of NBS RCC-P2.1.3.3.6 joint, the main steam isolation valve being counted as active component must can perform its function within its whole use phase in longevity.This means under normal and abnormal operating conditions, they must less than closing for 5 seconds after reactor protection system closes valve signal generation fast.For meeting these requirements, a kind of force fast-turn-off type hydraulic system is have employed in the main steam the isolation method actuator of Qinshan two core extension project, quick pass valve portion by main steam isolation valve actuator is designed to high pressure nitrogen system, using it as the accumulator that can not lose efficacy.As shown in Figure 1, the accumulator as major component comprises nitrogen side 2 and oily side 3 to the basic functional principle of quick closing valve hydraulic system, and nitrogen side 2 is connected with elevated pressure nitrogen gas tank 1, and oily side 3 is connected with main piston 6, has quick closing valve oil-feed solenoid valve 4 between oily side 3 and main piston 6; Main piston 6 is communicated with oil sump tank 7, has quick closing valve and unload solenoid 5 between main piston 6 and oil sump tank 7.When triggering fast OFF signal, open the solenoid valve of elevated pressure nitrogen gas tank 1 to discharge the pressure of nitrogen, quick closing valve unloads solenoid 5 and opens, and hydraulic oil below main piston 6 is communicated with oil sump tank 7; Quick closing valve oil-feed solenoid valve 4 is opened simultaneously, and under high pressure nitrogen promotes rapidly, in accumulator, the hydraulic oil of piston lower portion is injected into oil cylinder main piston 6 top, now main piston 6 valve closing, thus realizes " quick closing valve " function.
In this quick closing valve hydraulic system of prior art, accumulator is as the major component of quick closing valve hydraulic system, and accumulator oil side 3 and pipeline connection in quick closing valve hydraulic system, pressure is equal.Under normal temperature its intrinsic initially fill nitrogen after nitrogen side pressure be 2100psi, hydraulic oil side pressure is 0, and piston is depressed into bottom accumulator by nitrogen; After energising, hydraulic oil side is pressurized to 2800psi by hydraulic-pressure pump, and along with the rising of oil pressure, piston position rises, and compressed nitrogen makes nitrogen side pressure rise.According to original mentality of designing, after putting equipment in service, because nitrogen in accumulator, hydraulic fluid temperature rise, nitrogen pressure raises, and the oil in accumulator also rises due to volume small expansion pressure, and the pressure of oily side 3 raises slightly larger than nitrogen side 2, thus promotion piston moves to nitrogen side 2, until pressure drop is to equal with nitrogen pressure, equal rear pressure at both sides keeps balance always, piston keeps motionless, and therefore the nitrogen side 2 of accumulator should be designed with certain compensate for heat expansion gap.
But find in actual applications, hydraulic oil pressure is far longer than the rising of nitrogen side pressure with the rising of temperature, thus cause the piston position of accumulator to be in most cases positioned at the top of accumulator, namely the compensate for heat expansion gap in original design is not enough to solve in accumulator heat up and causes the technical problem of pressure change, causes superpressure in accumulator and whole hydraulic system.Therefore need to provide one can realize hydraulic system self-relieving nuclear power station main steam isolation valve actuator quick closing valve hydraulic system.
Summary of the invention
The present invention is directed to prior art Problems existing, providing one can self-relieving main steam isolation valve actuator quick closing valve hydraulic system, utilize the existing interface of main steam isolation valve actuator, increase by one and can unload die block loop in self-relieving outside, oil pressure during to meet the demand of quick closing valve oil mass and to ensure temperature variation in hydraulic system is no more than the design definite value of system.
Technological scheme of the present invention is as described below:
One can self-relieving main steam isolation valve actuator quick closing valve hydraulic system, in an accumulator oil external pressure release module loop, side, this pressure release module loop comprises: the adapter of high voltage interface, high pressure, pressure release module housing, Direct spring loaded safety valve, pressure release oil pipe and oil return interface;
It is high voltage interface that high pressure takes over one end, the oil side, accumulator bottom that high voltage interface is connected to original hydraulic system is drawn on pipeline, the high pressure adapter the other end is connected with pressure release module housing entrance, pressure release module housing outlet is connected with pressure release oil pipe one end, the pressure release oil pipe the other end is oil return interface, and last oil return orifice is to the oil sump tank of original hydraulic system; Direct spring loaded safety valve is arranged in pressure release module housing, and emergent separating valve is taken over high pressure in pressure release module housing ingress and is communicated with, and Direct spring loaded safety valve is communicated with pressure release oil pipe at pressure release module housing outlet place.
Further, described pressure release module loop also comprises an emergent separating valve, is arranged in pressure release module housing, and before Direct spring loaded safety valve, emergent separating valve is taken over high pressure in pressure release module housing ingress and is communicated with.Emergent separating valve is opening state when normal use, isolates during spring type safety defective valve for preventing to original hydraulic system.
During superpressure, hydraulic oil passes through high voltage interface, enter pressure release module loop, pressure release module housing entrance is flowed into by high pressure adapter, flow through emergent separating valve and Direct spring loaded safety valve arrival pressure release module housing outlet successively, by pressure release oil pipe and oil return interface, hydraulic oil is returned oil sump tank, realize releasing pressure automatically during quick closing valve hydraulic system superpressure.
Direct spring loaded safety valve is used for carrying out releasing pressure automatically when pressure relief system superpressure.During use, if hydraulic system superpressure, Direct spring loaded safety valve is opened automatically; When hydraulic system pressure recovers normal, Direct spring loaded safety valve is closed automatically.
Adopt technological scheme of the present invention, increase unload die block loop can system because temperature rise produce excessive bulk expand time via safety valve by unnecessary hydraulic pressure volume discharged to fuel tank.Make hydraulic system pressure can not exceed the scope of regulation, reach the effect of protection hydraulic system.The access port accessing original quick closing valve hydraulic system is selected to have prefabricated TP2 from quick closing valve Hydraulic System Oil side lower part, and namely pressure testing point place picks out, inner connection oil sump tank.The initial definite value of filling nitrogen is returned to the definite value of initial 2000psi simultaneously.Like this, after die block is unloaded in increase, both can ensure hydraulic system higher than during operating pressure by oil pressure Self-tipping in fuel tank, in turn ensure that piston is positioned at the top of accumulator simultaneously, be enough to the needs meeting quick closing valve, solve prior art Problems existing very well.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of nuclear power station main steam isolation valve actuator hydraulic system in prior art;
Fig. 2 is the structural front view of nuclear power station main steam isolation valve actuator of the present invention hydraulic system.
In figure, 1-elevated pressure nitrogen gas tank, 2-nitrogen side, 3-oil side, 4-quick closing valve oil-feed solenoid valve, 5-quick closing valve unloads solenoid, 6-main piston, 7-oil sump tank, 8-high voltage interface, and 9-high pressure is taken over, 10-pressure release module housing, 11-meets an urgent need separating valve, 12-Direct spring loaded safety valve, 13-pressure release oil pipe, 14-oil return interface.
Embodiment
Can self-relieving main steam isolation valve actuator hydraulic system be described in detail to of the present invention below in conjunction with drawings and Examples.
One can self-relieving main steam isolation valve actuator quick closing valve hydraulic system, in an accumulator oil external pressure release module loop, side 3, this pressure release module loop comprises: high voltage interface 8, high pressure adapter 9, pressure release module housing 10, emergent separating valve 11, Direct spring loaded safety valve 12, pressure release oil pipe 13 and oil return interface 14;
High pressure adapter 9 one end is high voltage interface 8, the oil side, accumulator bottom that high voltage interface 8 is connected to original hydraulic system is drawn on pipeline, high pressure adapter 9 the other end is connected with pressure release module housing 10 entrance, pressure release module housing 10 outlet is connected with pressure release oil pipe 13 one end, pressure release oil pipe 13 the other end is oil return interface 14, and last oil return interface 14 is communicated to the oil sump tank of original hydraulic system; Emergent separating valve 11 and Direct spring loaded safety valve 12 are arranged in pressure release module housing 10 successively, and emergent separating valve 11 is communicated with high pressure adapter 9 in pressure release module housing 10 ingress, and Direct spring loaded safety valve 12 is communicated with pressure release oil pipe 13 in pressure release module housing 10 outlet port.
Direct spring loaded safety valve 12 is for carrying out releasing pressure automatically when pressure relief system superpressure.During use, if hydraulic system superpressure, Direct spring loaded safety valve 12 is opened automatically; When hydraulic system pressure recovers normal, Direct spring loaded safety valve 12 is closed automatically.
Emergent separating valve 11 is opening state when normal use, closes immediately, for isolating original hydraulic system when Direct spring loaded safety valve 12 loses efficacy when Direct spring loaded safety valve 12 loses efficacy.
During superpressure, Direct spring loaded safety valve 12 is opened automatically, hydraulic oil is by high voltage interface 8, enter pressure release module loop, pressure release module housing 10 entrance is flowed into by high pressure adapter 9, flow through emergent separating valve 11 and Direct spring loaded safety valve 12 successively to arrive pressure release module housing 10 and export, by pressure release oil pipe 13 and oil return interface 14, hydraulic oil is returned oil sump tank, realize releasing pressure automatically during quick closing valve hydraulic system superpressure.Recover normally in hydraulic system internal pressure, Direct spring loaded safety valve 12 is closed automatically.
Increase hydraulic module can system because temperature rise produce excessive bulk expand time via safety valve by unnecessary hydraulic pressure volume discharged to fuel tank.Make hydraulic system pressure can not exceed the scope of regulation, reach the effect of protection hydraulic system.The wherein cracking pressure 3600psi of safety valve, according to ASME Section VIII Division1Section UG-125 (c) (2). and standard is carried out design and is obtained.Access port selects the existing prefabricated TP2 on the downside of hydraulic system quick closing valve oil tank and pressure testing point to pick out, inner connection oil sump tank.The initial definite value of filling nitrogen is returned to the definite value of initial 2000psi simultaneously.Like this, after die block is unloaded in increase, both can ensure hydraulic system higher than during operating pressure by oil pressure Self-tipping in fuel tank, in turn ensure that piston is positioned at the top of accumulator, be definitely enough to the needs meeting quick closing valve, problem is well solved simultaneously.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.If these amendments and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (2)
1. one kind can self-relieving main steam isolation valve actuator quick closing valve hydraulic system, it is characterized in that: in accumulator oil side (3) external pressure release module loop, described pressure release module loop comprises: the adapter of high voltage interface (8), high pressure (9), pressure release module housing (10), Direct spring loaded safety valve (12), pressure release oil pipe (13) and oil return interface (14);
High pressure adapter (9) one end is high voltage interface (8), on the pipeline that accumulator bottom oil side (3) that high voltage interface (8) is connected to original hydraulic system is drawn, high pressure adapter (9) the other end is connected with pressure release module housing (10) entrance, pressure release module housing (10) outlet is connected with pressure release oil pipe (13) one end, pressure release oil pipe (13) the other end is oil return interface (14), and last oil return interface (14) is communicated to the oil sump tank of original hydraulic system; Direct spring loaded safety valve (12) is arranged in pressure release module housing (10), and Direct spring loaded safety valve (12) is communicated with pressure release oil pipe (13) in pressure release module housing (10) outlet port.
2. as the one in claim 1 can self-relieving main steam isolation valve actuator quick closing valve hydraulic system, it is characterized in that: described pressure release module loop also comprises an emergent separating valve (11), be arranged in pressure release module housing (10), before being positioned at Direct spring loaded safety valve (12), emergent separating valve (11) is taken over (9) in pressure release module housing (12) ingress with high pressure and is communicated with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310322062.XA CN104343753A (en) | 2013-07-26 | 2013-07-26 | Quick-closing hydraulic system of main steam isolation valve executing mechanism capable of automatically relieving pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310322062.XA CN104343753A (en) | 2013-07-26 | 2013-07-26 | Quick-closing hydraulic system of main steam isolation valve executing mechanism capable of automatically relieving pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104343753A true CN104343753A (en) | 2015-02-11 |
Family
ID=52500033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310322062.XA Pending CN104343753A (en) | 2013-07-26 | 2013-07-26 | Quick-closing hydraulic system of main steam isolation valve executing mechanism capable of automatically relieving pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104343753A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2513846A1 (en) * | 1974-04-02 | 1975-10-16 | Alsthom Cgee | CONTROL DEVICE FOR OIL PRESSURE ACCUMULATOR |
| CN101070864A (en) * | 2007-06-25 | 2007-11-14 | 哈尔滨工业大学 | Energy-store state-liquid driving device of secondary flow-regulation coupling hydraulic energy accumulator |
| CN201144894Y (en) * | 2007-12-29 | 2008-11-05 | 山东法因数控机械股份有限公司 | Power head load-carrying balance energy accumulator hydraulic circuit |
| CN201214144Y (en) * | 2008-06-17 | 2009-04-01 | 无锡新佳盛压铸机制造有限公司 | Energy accumulator security control apparatus of aluminum-magnesium alloy horizontal type cold-chamber die casting machine |
| CN101858365A (en) * | 2010-05-26 | 2010-10-13 | 太原重工股份有限公司 | Hydraulic control system for oil inlet and oil return of energy accumulator |
| CN201741419U (en) * | 2010-07-22 | 2011-02-09 | 中广核工程有限公司 | Main water supply flow control system of nuclear power plant |
| CN102562362A (en) * | 2011-11-18 | 2012-07-11 | 南京理工大学 | Oil supply device of high-frequency electromagnetic valve type pulse detonation engine |
| CN202718651U (en) * | 2011-12-16 | 2013-02-06 | 卞康群 | Under-pressure operating device for automatically and safely reversing pipe column coupling |
| CN203023525U (en) * | 2012-12-06 | 2013-06-26 | 中核苏阀科技实业股份有限公司 | Nuclear secondary main steam isolation valve |
| CN203463383U (en) * | 2013-07-26 | 2014-03-05 | 中核核电运行管理有限公司 | Fast-closing hydraulic system capable of automatically releasing pressure of main steam isolation valve actuator |
-
2013
- 2013-07-26 CN CN201310322062.XA patent/CN104343753A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2513846A1 (en) * | 1974-04-02 | 1975-10-16 | Alsthom Cgee | CONTROL DEVICE FOR OIL PRESSURE ACCUMULATOR |
| CN101070864A (en) * | 2007-06-25 | 2007-11-14 | 哈尔滨工业大学 | Energy-store state-liquid driving device of secondary flow-regulation coupling hydraulic energy accumulator |
| CN201144894Y (en) * | 2007-12-29 | 2008-11-05 | 山东法因数控机械股份有限公司 | Power head load-carrying balance energy accumulator hydraulic circuit |
| CN201214144Y (en) * | 2008-06-17 | 2009-04-01 | 无锡新佳盛压铸机制造有限公司 | Energy accumulator security control apparatus of aluminum-magnesium alloy horizontal type cold-chamber die casting machine |
| CN101858365A (en) * | 2010-05-26 | 2010-10-13 | 太原重工股份有限公司 | Hydraulic control system for oil inlet and oil return of energy accumulator |
| CN201741419U (en) * | 2010-07-22 | 2011-02-09 | 中广核工程有限公司 | Main water supply flow control system of nuclear power plant |
| CN102562362A (en) * | 2011-11-18 | 2012-07-11 | 南京理工大学 | Oil supply device of high-frequency electromagnetic valve type pulse detonation engine |
| CN202718651U (en) * | 2011-12-16 | 2013-02-06 | 卞康群 | Under-pressure operating device for automatically and safely reversing pipe column coupling |
| CN203023525U (en) * | 2012-12-06 | 2013-06-26 | 中核苏阀科技实业股份有限公司 | Nuclear secondary main steam isolation valve |
| CN203463383U (en) * | 2013-07-26 | 2014-03-05 | 中核核电运行管理有限公司 | Fast-closing hydraulic system capable of automatically releasing pressure of main steam isolation valve actuator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106134390B (en) | A kind of implementation method of space propulsion system | |
| US9761334B2 (en) | Multi stage safety injection device and passive safety injection system having the same | |
| CA2830874C (en) | Passive residual heat removal system and nuclear power plant equipment | |
| KR101447028B1 (en) | Multi stage safety injection device and passive safety injection system having the same | |
| CN111322440B (en) | Pressure reducing valve | |
| CN103050161B (en) | The method of auxiliary feedwater pipeline automatism isolation | |
| CN110131574B (en) | Fuel cell hydrogen supply system based on combination valve and hydrogen charging and supplying method thereof | |
| EP3667678B1 (en) | Depressurisation valve | |
| US20140016733A1 (en) | Passive safety injection system using safety injection tank | |
| CN201646610U (en) | Automatic protection device of dump truck hydraulic pipeline | |
| RU2477797C1 (en) | Method for shield control | |
| CN110111977A (en) | A kind of the accident oil draining system and its method of discharge of high-power transformer oil conservater | |
| CN102373689B (en) | High-pressure waterway control system | |
| CN203463383U (en) | Fast-closing hydraulic system capable of automatically releasing pressure of main steam isolation valve actuator | |
| CN104343753A (en) | Quick-closing hydraulic system of main steam isolation valve executing mechanism capable of automatically relieving pressure | |
| CN103511402A (en) | Method for preventing hydraulic lock and special pressure balance device for preventing hydraulic lock | |
| CN205751539U (en) | A kind of special non-kinetic safety equipment of nuclear power station | |
| CN218439956U (en) | Liquid filling control valve group of energy accumulator | |
| CN116085502A (en) | Valve group for pressure relief and discharge of primary circuit | |
| Park et al. | Major results from 1-train passive safety system tests for the SMART design with the SMART-TIL facility | |
| CN203836304U (en) | High-pressure safety pilot valve | |
| CN209083530U (en) | A kind of hydrogenation stations autoclave diaphragm compressor flow structure and hydrogenation stations autoclave diaphragm compressor | |
| CN207213264U (en) | A kind of storage tank or built in pipeline formula emergency safety device | |
| CN209083518U (en) | A kind of air compressor machine automatic drain system | |
| Park et al. | Core Cooling Behaviors in SMART-ITL with Passive Safety Injection System and Passive Residual Heat Removal System during a SBLOCA Scenario |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150211 |
|
| RJ01 | Rejection of invention patent application after publication |