CN101013611A - Waterpower driving mechanism for reactor safety rod - Google Patents
Waterpower driving mechanism for reactor safety rod Download PDFInfo
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- CN101013611A CN101013611A CNA2007100630684A CN200710063068A CN101013611A CN 101013611 A CN101013611 A CN 101013611A CN A2007100630684 A CNA2007100630684 A CN A2007100630684A CN 200710063068 A CN200710063068 A CN 200710063068A CN 101013611 A CN101013611 A CN 101013611A
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- cylinder
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- safety rod
- rod
- cylinder sleeve
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
A reactor safety hydraulic rod drive mechanism, involving water-cooled reactor safety rod driving device. The hydraulic drive mechanism composed of hydraulic driven cylinder, the cylinder and hydraulic drive circuit components. The hydraulic driven cylinder includes the piston, connection rod, and cylinder thimble. The cylinder walls connected with the rod and piston in non-connect seal method. There are at least three overflow holes along with the circumference in the upper of the cylinder thimble. The top of the cylinder is closed. It is concentric with the cylinder thimble. Hydraulic drive circuit contains water pipes for pumping and drainage. One end of the pumping pipes and drainage pipes is connected to the inner of the reactor pressure vessel, and the other end is connected to the hydraulic driven cylinder. The circulating pump and flow control valve are installed on pumping pipes, while the solenoid valve is installed on the drainage pipes. What the invention demonstrates is only good safety and reliability, but also economic value for its simple structure. Compared with PWR control rod with magnetic, its cost is 1/3 to 1/5.
Description
Technical field
The present invention relates to a kind of waterpower driving mechanism for reactor safety rod, particularly the structural design of water-cooled reactor safety rod drive unit belongs to the nuclear reactor equipment technical field.
Background technology
The reactor safety rod drive mechanism is to concern the operation of reactor and the vitals of safety, is used for the driving of reactor safety rod, realize safety rod rod withdrawal, keep and function such as the rod that falls.Existing reactor all uses control rod drive mechanisms (CRD) (as rope sheave mechanism, pinion and rack, magnetic force hoisting mechanism etc.) to be also used as the safety rod driving mechanism.But, because safety rod has only the three kinds of duties of rod that propose reactor core, keep and fall, require much simply than the driving of control rod drive mechanisms (CRD), but that its reliability then will be tried to achieve is more strict.Therefore from the angle of security and economy, do also improper like this.
Summary of the invention
The purpose of this invention is to provide a kind of waterpower driving mechanism for reactor safety rod, the hydro powered mechanism that promptly with the hydrodynamic is power replaces the general control rod drive mechanism to drive the reactor safety rod, to simplify the safety rod driving mechanism, and then the reliability, the security that improve the safety rod driving mechanism, the cost of reduction safety rod driving mechanism.
Technical scheme of the present invention is as follows:
A kind of waterpower driving mechanism for reactor safety rod is characterized in that: described hydro powered mechanism comprises hydro powered cylinder, outer shell and is arranged on the hydro powered loop of reactor pressure vessel outside; Described hydro powered cylinder is by piston, form with rigidly connected connecting rod of safety rod and cylinder sleeve, and cylinder sleeve is made of cylinder sleeve head and cylinder sleeve two parts, is provided with at least three spout holes that are uniformly distributed along the circumference at the destination county of the upper piston stroke of cylinder sleeve head; Adopt the noncontact sealing between the inwall of described cylinder sleeve and the connecting rod and between the inwall of piston and cylinder sleeve head; Described outer shell top closure with the cylinder sleeve arranged concentric, and leaves the gap between the two, and the bottom of this outer shell is connected with reactor pressure vessel by flange; Intake pipe and drainpipe are contained in described hydro powered loop, one end of intake pipe and drainpipe communicates with the reactor pressure vessel inner chamber respectively, the other end of intake pipe and drainpipe is communicated with the hydro powered cylinder interior, ebullator and mediation valve are installed on described intake pipe, on described drainpipe, solenoid valve are installed.
Waterpower driving mechanism for reactor safety rod of the present invention, its feature also is: a snorkel is also contained in this safety rod hydro powered mechanism, and an end of this snorkel communicates with the inner chamber at outer shell top, and the other end communicates with the inner chamber of reactor pressure vessel.
Another optimal technical scheme of the present invention is: a snorkel is also contained in this safety rod hydro powered mechanism, and on flange, be provided with air hole, described snorkel one end communicates with the inner chamber at outer shell top, and the other end communicates with the inner chamber of reactor pressure vessel by the air hole on the flange.
Non-contacting seal of the present invention can adopt clearance-type or maze-type structure.
The present invention compared with prior art, have the following advantages and the high-lighting effect: utilize waterpower driving mechanism for reactor safety rod provided by the present invention to replace utilizing in the prior art control rod drive mechanisms (CRD) double as safety flap driving mechanism, not only show good safety and reliability, and have good and economic; Have only a water inlet pipe to link to each other between hydro powered cylinder and the hydro powered loop, be on the reactor main circuit border with the simplest safety rod driving mechanism of inner structure, therefore will bring good operational reliability to reactor.In addition, when reactor cut off the power supply, safety rod can rely on gravity to fall into reactor core automatically, stops the operation of reactor, therefore had good inherent safety.The present invention simultaneously compares with existing Electromechanical Control rod drive mechanism, and is not only simple in structure, and cost is low, and for example comparing its cost with the presurized water reactor control rod with the magnetic force hoisting device is 1/3～1/5 of magnetic force hoisting device.
Description of drawings
Fig. 1 is the structural representation of safety rod hydro powered provided by the invention mechanism.
Fig. 2 is the structural representation of hydro powered cylinder.
Wherein: the 1-reactor core; The 2-safety rod; The 3-ebullator; The 4-solenoid valve; The 5-flow control valve; 6-safety rod hydro powered cylinder; The 7-reactor pressure vessel; The 8-outer shell; The 9-spout hole; The 10-cylinder sleeve; The 11-piston; The 12-water inlet; The 13-impact damper; The 14-connecting rod; The 15-intake pipe; The 16-drainpipe; The 17-snorkel; 18-cylinder sleeve head; 19-cylinder sleeve.
Embodiment
Below in conjunction with accompanying drawing concrete structure of the present invention, the course of work are further described.
Fig. 1, Fig. 2 are the structural representation of safety rod hydro powered provided by the invention mechanism.This hydro powered mechanism comprises hydro powered cylinder 6, outer shell 8 and is arranged on hydro powered loop three parts of reactor pressure vessel outside, described hydro powered cylinder is by piston 11, form with rigidly connected connecting rod 14 of safety rod and cylinder sleeve 10, cylinder sleeve is made of cylinder sleeve head 18 and cylinder sleeve 19 two parts, is provided with at least three spout holes 9 that are uniformly distributed along the circumference at the destination county of the upper piston stroke of cylinder sleeve head; Adopt the noncontact sealing between the inwall of described cylinder sleeve 19 and the connecting rod 14 and between the inwall of piston 11 and cylinder sleeve head 18, the noncontact sealing can be adopted clearance-type or maze-type structure; The top of outer shell 8 is closed, should keep arranged concentric with cylinder sleeve 10, and leaves the gap between the two, and the bottom of this outer shell 8 is connected with reactor pressure vessel 7 by flange; The hydro powered loop of hydro powered cylinder is arranged on the outside of reactor pressure vessel 7, comprise intake pipe 15 and drainpipe 16, one end of intake pipe and drainpipe communicates with the reactor pressure vessel inner chamber respectively, the other end of intake pipe and drainpipe is by water inlet 12 and cylinder sleeve 10 internal communication, ebullator 3 and flow control valve 5 are installed on described intake pipe, on described drainpipe 16 solenoid valve 4 is installed, this solenoid valve can adopt normally open solenoid valve.Under the situation that solenoid valve 4 energisings are closed, water after the pressurization enters cylinder sleeve 10 inside, when flow is enough big, flow through behind the total load of the formed lifting force of dynamic pressure difference greater than movement parts at piston two ends about in the of 11, piston 11 drivening rods 14 and safety rod 2 move upward, until last terminal point (spout hole 9 places).After the lower edge of piston 11 is higher than spout hole 9, the press water in the cylinder sleeve 10 will turn back to reactor pressure vessel 7 by spout hole 9, outer shell 8, and piston 11 will remain on the position of terminal point.
When solenoid valve 4 outages are opened, the water in the hydro powered cylinder 6 will turn back in the reactor pressure vessel 7 by solenoid valve 4 and drainpipe 16, and safety rod 2 will fall into reactor core 1 rapidly.After the drive system outage, ebullator 3 will stop, solenoid valve 4 will cut off the power supply simultaneously simultaneously in addition, and safety rod 2 will fall into reactor core 1 more rapidly.
Safety rod hydro powered working process of mechanism is as follows:
1) safety rod promotes state: the solenoid valve energising makes solenoid valve 4 be closed condition, and the water in the reactor pressure vessel 7 after ebullator 3 pressurizations, by variable valve 5, enters safety rod hydro powered cylinder through water inlet 12.After flow was greater than critical maintenance flow, under the promotion of current, piston 11 moved upward, and drove with it just that the safety rod 2 of knot moves upward, and arrived spout hole 9 until the lower edge of piston.
2) safety rod hold mode: after the lower edge of piston arrives spout hole 9, current will turn back in the reactor pressure vessel 7 by spout hole 9, and piston 11 will stop on this position.At this moment safety rod will remain on more than the reactor core.
3) the bar-shaped attitude that falls: solenoid valve 4 promote and during hold mode energising close, when the clubs that falls was done, solenoid valve 4 cut off the power supply, and is opening.The water of piston 11 bottoms will turn back to reactor pressure vessel 7 by this solenoid valve 4 and drainpipe 16.Such setting meets the principle of the accident safety of reactor.
The bar-shaped attitude that falls can be to reach by the power supply that cuts off solenoid valve 4, also can reach by the general supply of cutting off system, but because back kind state solenoid valve 4 and ebullator 3 are cut off power supply simultaneously, so the speed of the rod that falls is faster.
Fig. 2 is the structural representation of hydro powered cylinder, as seen from Figure 2, the structure of hydro powered cylinder 6 is very simple, and adopting non-contacting seal between casing wall and the piston and between piston rod and the cylinder head, have only a water inlet pipe to link to each other between hydro powered cylinder and the hydro powered loop, be on the reactor main circuit border with the simplest safety rod driving mechanism of inner structure, therefore will bring good operational reliability to reactor.A snorkel 17 is also contained in this safety rod hydro powered mechanism in addition, the connected mode of snorkel can realize by following dual mode: a kind of connected mode is that an end of this snorkel 17 communicates with the inner chamber at outer shell top, and the other end communicates with the inner chamber of reactor pressure vessel.Another kind of connected mode is on the flange below outer shell air hole to be set, and an end of snorkel 17 is communicated with the inner chamber at outer shell top, and the other end communicates with the inner chamber of reactor pressure vessel by the air hole on the flange.
Claims (4)
1. waterpower driving mechanism for reactor safety rod is characterized in that: described hydro powered mechanism comprises hydro powered cylinder (6), outer shell (8) and is arranged on the outside hydro powered loop of reactor pressure vessel (7) and forms; Described hydro powered cylinder is by piston (11), form with rigidly connected connecting rod of safety rod (14) and cylinder sleeve (10), cylinder sleeve is made of cylinder sleeve head (18) and cylinder sleeve (19) two parts, is provided with at least three spout holes (9) that are uniformly distributed along the circumference at the destination county of the upper piston stroke of cylinder sleeve head; Adopt non-contacting seal between the inwall of described cylinder sleeve (19) and the connecting rod (14) and between the inwall of piston (11) and cylinder sleeve head (18); Described outer shell (8) top closure with cylinder sleeve (10) arranged concentric, and leaves the gap between the two, and the bottom of this outer shell is connected with reactor pressure vessel (7) by flange; Intake pipe (15) and drainpipe (16) are contained in described hydro powered loop, one end of intake pipe and drainpipe communicates with the inner chamber of reactor pressure vessel respectively, the other end of intake pipe and drainpipe is communicated with the hydro powered cylinder, ebullator (3) and mediation valve (5) are installed on described intake pipe (15), solenoid valve (4) is installed on described drainpipe (16).
2. according to the described waterpower driving mechanism for reactor safety rod of claim 1, it is characterized in that: a snorkel (17) is also contained in this safety rod hydro powered mechanism, one end of this snorkel communicates with the inner chamber at outer shell (8) top, and the other end communicates with the inner chamber of reactor pressure vessel.
3. according to the described waterpower driving mechanism for reactor safety rod of claim 1, it is characterized in that: a snorkel (17) is also contained in this safety rod hydro powered mechanism, and on the flange of outer shell bottom, air hole is set, described snorkel one end communicates with the inner chamber at outer shell (8) top, and the other end communicates with the inner chamber of reactor pressure vessel by the air hole on the flange.
4. according to claim 1,2 or 3 described waterpower driving mechanism for reactor safety rod, it is characterized in that: described noncontact is sealed into clearance-type or maze-type structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100630684A CN100520982C (en) | 2007-01-26 | 2007-01-26 | Waterpower driving mechanism for reactor safety rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100630684A CN100520982C (en) | 2007-01-26 | 2007-01-26 | Waterpower driving mechanism for reactor safety rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101013611A true CN101013611A (en) | 2007-08-08 |
| CN100520982C CN100520982C (en) | 2009-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100630684A Active CN100520982C (en) | 2007-01-26 | 2007-01-26 | Waterpower driving mechanism for reactor safety rod |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101510452B (en) * | 2009-03-11 | 2011-06-22 | 哈尔滨工程大学 | Continuous mobile waterpower drive device of nuclear reactor control rod |
| CN110148481A (en) * | 2019-06-03 | 2019-08-20 | 中国原子能科学研究院 | The judgment method of reactor hydraulic safe rod drives operating status |
| CN111370148A (en) * | 2018-12-25 | 2020-07-03 | 国家电投集团科学技术研究院有限公司 | Two sets of shutdown mechanisms of reactor and reactor |
| CN111980983A (en) * | 2020-08-04 | 2020-11-24 | 清华大学 | Control rod hydraulic drive circuit and control rod drive wire |
| CN111997957A (en) * | 2020-07-31 | 2020-11-27 | 清华大学 | Hydraulic cylinder and control rod hydraulic drive system |
| CN112037938A (en) * | 2020-07-31 | 2020-12-04 | 清华大学 | Control rod built-in hydraulic drive circuit and control rod drive device |
| CN112053790A (en) * | 2020-07-31 | 2020-12-08 | 清华大学 | Piston type water conduit flange, rod position measuring assembly and control rod hydraulic drive system |
-
2007
- 2007-01-26 CN CNB2007100630684A patent/CN100520982C/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101510452B (en) * | 2009-03-11 | 2011-06-22 | 哈尔滨工程大学 | Continuous mobile waterpower drive device of nuclear reactor control rod |
| CN111370148A (en) * | 2018-12-25 | 2020-07-03 | 国家电投集团科学技术研究院有限公司 | Two sets of shutdown mechanisms of reactor and reactor |
| CN110148481A (en) * | 2019-06-03 | 2019-08-20 | 中国原子能科学研究院 | The judgment method of reactor hydraulic safe rod drives operating status |
| CN111997957A (en) * | 2020-07-31 | 2020-11-27 | 清华大学 | Hydraulic cylinder and control rod hydraulic drive system |
| CN112037938A (en) * | 2020-07-31 | 2020-12-04 | 清华大学 | Control rod built-in hydraulic drive circuit and control rod drive device |
| CN112053790A (en) * | 2020-07-31 | 2020-12-08 | 清华大学 | Piston type water conduit flange, rod position measuring assembly and control rod hydraulic drive system |
| CN111997957B (en) * | 2020-07-31 | 2021-11-26 | 清华大学 | Hydraulic cylinder and control rod hydraulic drive system |
| CN112037938B (en) * | 2020-07-31 | 2022-09-23 | 清华大学 | Control rod built-in hydraulic drive circuit and control rod drive device |
| CN111980983A (en) * | 2020-08-04 | 2020-11-24 | 清华大学 | Control rod hydraulic drive circuit and control rod drive wire |
| CN111980983B (en) * | 2020-08-04 | 2021-11-26 | 清华大学 | Control rod hydraulic drive circuit and control rod drive wire |
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| Publication number | Publication date |
|---|---|
| CN100520982C (en) | 2009-07-29 |
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