CN114550957A - Passive flow limiting device for low-temperature reactor coolant pipeline - Google Patents
Passive flow limiting device for low-temperature reactor coolant pipeline Download PDFInfo
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- CN114550957A CN114550957A CN202210106890.9A CN202210106890A CN114550957A CN 114550957 A CN114550957 A CN 114550957A CN 202210106890 A CN202210106890 A CN 202210106890A CN 114550957 A CN114550957 A CN 114550957A
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- 239000002826 coolant Substances 0.000 title claims abstract description 54
- 230000000670 limiting effect Effects 0.000 title claims abstract description 32
- 238000009434 installation Methods 0.000 claims abstract description 22
- 238000007789 sealing Methods 0.000 claims abstract description 20
- 230000007246 mechanism Effects 0.000 claims abstract description 6
- 230000009471 action Effects 0.000 claims abstract description 5
- 230000002159 abnormal effect Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 230000000694 effects Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 230000009191 jumping Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/02—Details of handling arrangements
- G21C19/04—Means for controlling flow of coolant over objects being handled; Means for controlling flow of coolant through channel being serviced, e.g. for preventing "blow-out"
-
- 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
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention provides a passive flow limiting device for a coolant pipeline of a low-temperature reactor, which comprises: the flow-limiting pressure-bearing shell comprises an upper shell and a lower shell, the upper shell and the lower shell are fixedly connected in a sealing manner, an installation cavity is formed in the upper shell, and a buffer cavity is formed at the top of the installation cavity; the flow limiting mechanism is arranged in the installation cavity and comprises a valve core, a supporting frame and a floating valve seat, the supporting frame is arranged at the bottom of the upper cavity and used for supporting the valve core, the floating valve seat is sleeved in the installation cavity in a sliding mode and located above the supporting frame and the valve core, and the floating valve seat is in sealing contact with the valve core and slides up and down along the buffer cavity under the pushing action of the valve core. The flow limiting device can realize the flow limiting effect without depending on the external force, reduce the impact on the shell and the pipeline and improve the safety and the economic performance of the nuclear reactor.
Description
Technical Field
The invention belongs to the technical field of nuclear reactors, and particularly relates to a passive flow limiting device for a low-temperature reactor coolant pipeline.
Background
The low-temperature reactor adopts an integrated arrangement, full-power natural circulation and self-voltage stabilization mode. The primary heat exchanger is disposed within the reactor pressure vessel. The reactor coolant system is entirely contained within the reactor pressure vessel. The reactor coolant circulates naturally in a flow passage formed by the reactor internals by a driving force generated by a density difference between cold water and hot water. The reactor is integrally arranged, so that a main pipeline is omitted; the natural circulation mode is adopted, a main pump is omitted, the accident probability of loss of coolant accident and reactor core melting is reduced, and the safety of the reactor is greatly improved. The low-temperature reactor also adopts a passive waste heat discharge system. Intrinsic safety is an important indicator of a thermopile.
The breach accident is a matter that must be considered when analyzing the accident of the reactor. Under the condition of a breach accident, how to ensure that the reactor core is not exposed is an important problem related to the safety of the reactor. The low-temperature reactor has the characteristics of large water capacity, no main pipeline, uniform arrangement of all extension pipelines on the upper part of the cylinder body and the like, and the analysis of the break accident shows that the reactor core is always submerged by water and the reactor is safe. As a commercial reactor, safety and economy are two important indicators thereof. There is a constant effort in the cryogenic reactor to improve economics. Particularly, on the basis of the characteristics of the reactor, the characteristics are utilized to optimize the design, reduce the accident consequence, reduce the requirements of structures and equipment and improve the economy of the low-temperature reactor.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a passive flow limiting device for a coolant pipeline of a low temperature reactor, which automatically blocks a break without external force and only depending on accident conditions to limit medium leakage, thereby improving safety and economic performance.
In order to achieve the purpose, the invention adopts the following technical scheme:
the technical scheme of the invention provides a passive flow limiting device for a low-temperature reactor coolant pipeline, which comprises:
the flow-limiting pressure-bearing shell comprises an upper shell and a lower shell, the upper shell and the lower shell are fixedly connected in a sealing mode, an installation cavity is formed in the upper shell, a buffer cavity is formed at the top of the installation cavity, a through hole communicated with the installation cavity is formed at the top of the upper shell, a lower cavity for the flowing of the coolant is formed in the lower shell, and the installation cavity is communicated with the lower cavity;
the flow limiting mechanism is arranged in the installation cavity and comprises a valve core, a supporting frame and a floating valve seat, the supporting frame is arranged at the bottom of the upper cavity and used for supporting the valve core, the floating valve seat is sleeved in the installation cavity in a sliding mode and located above the supporting frame and the valve core, and the floating valve seat is in sealing contact with the valve core and slides up and down along the buffer cavity under the pushing action of the valve core.
Preferably, the buffer cavity is an annular cavity, the floating valve seat is annular, and the top of the floating valve seat slides up and down along the buffer cavity.
Preferably, the valve core is spherical, a channel for the coolant to pass through is formed between the supporting frame and the valve core, a conical surface matched with the valve core is formed at the bottom of the floating valve seat, when the valve core is in a normal working condition, the bottom of the floating valve seat is spaced from the flow limiting valve core to form a channel for the coolant to flow through, and when the valve core is in an abnormal working condition, the conical surface at the bottom of the floating valve seat is in contact with the valve core to form a first seal and push the floating valve seat to move upwards along the buffer cavity.
Preferably, a round angle is formed at the top of the upper shell, a conical surface matched with the round angle is formed at the top of the floating valve seat, and when the valve core pushes the floating valve seat to move upwards to abut against the round angle, a second seal is formed between the floating valve seat and the upper shell.
Preferably, the support bracket includes a support ring and a plurality of support plates mounted on the support ring at intervals in a circumferential direction, the support plates are used for supporting the valve element, and the support ring is fixedly mounted at the bottom of the upper housing.
Preferably, at least one backflow channel is further formed in the upper shell, the top end of the backflow channel is communicated with the buffer cavity, and the bottom end of the backflow channel is communicated with the bottom end of the upper shell and communicated with the lower cavity.
Preferably, an annular support member is further formed in the upper housing to support a bottom of the float seat valve housing.
Preferably, an annular clamping groove is formed in the upper shell, a clamping ring is installed in the clamping groove, and the clamping ring is used for supporting the bottom of the floating seat valve sleeve.
Preferably, the cooling device further comprises an upper end connecting flange and a lower end connecting flange, the upper end connecting flange is fixedly connected with the upper shell, the lower end connecting flange is connected with the lower shell, and channels for the coolant to flow through are formed in the upper end connecting flange and the lower end connecting flange.
Preferably, the upper shell and the lower shell are connected through bolts or welding, and a metal sealing ring is further arranged on the end face of the upper shell connected with the lower shell.
Due to the adoption of the technical scheme, the invention has the following advantages:
the passive flow limiting device for the low-reaction counter coolant pipeline provided by the invention has the advantages that under the normal flow speed of the pipeline, the coolant flows through the flow channel between the valve core and the shell; under the condition of a breach accident, because the flow velocity of media around the valve core is obviously improved, the differential pressure between the upper side and the lower side of the valve core is increased, the valve core jumps to block a flow passage, the automatic flow limitation is realized, the water loss amount under the breach accident is greatly limited, and the safety performance and the economic performance of the flow limitation are improved.
The floating valve seat is arranged in the flow-limiting pressure-bearing shell, and the floating valve seat moves upwards to be inserted into the buffer water cavity in the flow-limiting pressure-bearing upper shell when the flow-limiting core jumps, so that the impact of the jump of the flow-limiting core on the flow-limiting device and a connected pipeline is reduced. A pair of sealing surfaces is arranged between the floating valve seat and the valve core; and another pair of sealing surfaces is arranged between the floating valve seat and the pressure-bearing upper shell, and the two pairs of sealing surfaces are used for sealing and plugging the fluid channel.
Drawings
FIG. 1 is a schematic view of a passive flow limiting device for coolant piping for low temperature reaction according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the upper housing;
FIG. 3 is a cross-sectional view of the lower housing;
FIG. 4 is a cross-sectional view of the support shelf;
FIG. 5 is a top view of the support shelf;
description of reference numerals:
1-upper end connecting flange, 2-lower end connecting flange, 3-upper shell, 4-lower shell, 5-flow limiting mechanism, 6-pressure measuring nozzle, 7-pressure measuring nozzle, 11-channel, 21-channel, 31-mounting cavity, 32-buffer cavity, 33-backflow channel, 34-through hole, 35-fillet, 41-lower cavity, 52-support ring, 52-support plate, 53-mounting table and 54-opening clamping groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the system or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used to define elements only for convenience in distinguishing between the elements, and unless otherwise stated, are not intended to imply any particular meaning or importance to the contrary.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In a water coolant pipeline, the core problems of the passive flow limiting device for the coolant pipeline are that the valve core of the flow limiting device jumps and the impact of a water hammer effect on the flow limiting device and the pipeline is one of the core problems, and the embodiment of the invention provides the passive flow limiting device for the coolant pipeline of the low-temperature reactor, when a breach accident occurs, because the flow velocity of a medium around the valve core 52 is obviously improved, the differential pressure of the upper side and the lower side of the valve core 52 is increased, the valve core 52 jumps to seal the flow channel, and the automatic flow limiting is realized; after jumping, the valve core 52 is kept at the plugging position by the pressure difference between the internal pressure and the external pressure of the system, and the flow limiting effect is maintained. A floating valve seat 53 is arranged in the flow-limiting pressure-bearing shell, and the floating valve seat 53 moves upwards to be inserted into the buffer cavity 32 in the upper section of the flow-limiting pressure-bearing shell when the valve core 52 jumps, so that the impact of the valve core 52 jumping on the flow-limiting device and a connected pipeline is reduced. The passive flow limiting device can reduce the water filling amount of the pressure container and reduce the radioactive consequences of the breach accident, thereby improving the economy of the reactor.
As shown in fig. 1, the passive flow limiting device for a cryogenic reactor coolant pipeline includes a flow-limiting pressure-bearing housing and a flow-limiting mechanism 5 installed in the flow-limiting pressure-bearing housing. The current-limiting pressure-bearing shell comprises an upper shell 3 and a lower shell 4, the upper shell 3 is fixedly connected with the lower shell 4 in a sealing mode, an installation cavity 31 is formed in the upper shell 3, a buffer cavity 32 is formed at the top of the installation cavity 31, a through hole communicated with the installation cavity 31 is formed in the top of the upper shell 3, a lower cavity 41 for flowing of coolant is formed in the lower shell 4, and the installation cavity 31 is communicated with the lower cavity 41. The flow limiting mechanism 5 is installed in the installation cavity 31 and comprises a valve core 52, a supporting frame 51 and a floating valve seat 53, wherein the supporting frame 51 is installed at the bottom of the upper cavity 3 and used for supporting the valve core 52, the floating valve seat 53 is slidably sleeved in the installation cavity 31 and located above the supporting frame 51 and the valve core 52, and the floating valve seat 53 is in sealing contact with the valve core 52 and slides up and down along the buffer cavity 32 under the pushing action of the valve core 52.
During normal operation of the reactor, the valve core 52 is positioned on the support frame 51, and coolant flows through the flow restriction device from the flow passage around the valve core 52; when the coolant pipe is broken, the high-pressure coolant is ejected from the broken pipe/slit, causing the coolant flow rate in the passive flow restriction device to rise significantly, thereby pushing the valve element 52 to move upward to hit the floating valve seat 53 and to make a sealing contact with the floating valve seat 53 to close the coolant flow passage of the flow restriction device, and simultaneously pushing the floating valve seat 53 to move along the buffer chamber, relieving the collision against the upper housing 3, and maintaining the flow restriction by means of the coolant pressure difference.
As shown in fig. 2 and 3, a floating valve seat 53 is arranged in the flow-limiting pressure-bearing shell, and the floating valve seat 53 moves upwards to be inserted into the buffer cavity 32 in the upper section of the flow-limiting pressure-bearing shell when the valve core 52 jumps, so that the impact of the jump of the valve core 52 on the flow-limiting device and a connected pipeline is reduced.
The buffer cavity 32 is an annular cavity, the floating valve seat 53 is annular, and the top of the floating valve seat 53 slides up and down along the buffer cavity 32; the valve core 52 is spherical, a channel for the coolant to pass through is formed between the supporting frame 51 and the valve core 52, a conical surface matched with the valve core 52 is formed at the bottom of the floating valve seat 53, when the valve core 52 is in a normal working condition, the bottom of the floating valve seat 53 is spaced from the valve core 52 to form a channel for the coolant to pass through, and when the valve core 52 is in an abnormal working condition, the conical surface at the bottom of the floating valve seat 53 is in contact with the valve core 52 to form a first seal and push the floating valve seat 53 to move upwards along the buffer cavity 32.
A spherical valve core 52 is arranged in the flow-limiting pressure-bearing shell, the valve core 52 is seated on a support frame 51 when the reactor normally runs, the design of the valve core 52 and surrounding flow channels ensures that the flow rate of the coolant cannot jump when the flow rate fluctuates in a normal range, and the coolant jumps under the action of the pressure difference of the coolant to realize flow limitation when the pipe is broken.
In order to further improve the sealing effect and further improve the flow limiting effect, a fillet 35 is formed at the top of the upper housing 3, a conical surface matched with the fillet 35 is formed at the top of the floating valve seat 53, and when the valve core 52 pushes the floating valve seat 53 to move upwards to abut against the fillet 35, a second seal is formed between the floating valve seat 53 and the upper housing 3.
As shown in fig. 4 and 5, the support bracket 51 includes a support ring 511 and a plurality of support plates 512 mounted on the support ring 511 at intervals in a circumferential direction, the plurality of support plates 512 are used to support the valve core 52, and the support ring 511 is fixedly mounted on the bottom of the upper housing 3. The periphery of the support ring 511 is formed with a plurality of mounting platforms along the circumferential direction, and each mounting platform 513 is provided with a threaded hole for inserting a bolt to fixedly mount the support frame 5 on the bottom of the upper housing 3. An open slot is formed between two adjacent mounting platforms 513. The supporting plate 512 is formed with a supporting arc matched with the valve core, when the valve core 52 is stably supported at the central position of the supporting frame 51 by the supporting plate 512 during normal operation, when the valve core 52 jumps during abnormal operation, the coolant flow rate is increased, and the valve core 52 is in contact with the floating valve seat 53 to form sealing contact, thereby closing the flow passage.
At least one backflow channel 33 is further formed in the upper shell 3, the top end of the backflow channel 33 is communicated with the buffer cavity 32, and the bottom end of the backflow channel 33 is communicated with the bottom end of the upper shell and the lower cavity 41.
The floating valve seat 53 moves upward to press the coolant in the annular buffer chamber 32, and the coolant flows back into the lower chamber 41 through the mutually reserved passages. The open clamping groove 54 is aligned with the backflow channel 33, and fluid in the backflow channel 33 flows back through the clamping groove 54 and then flows into the lower cavity. When the upper part of the floating valve seat 53 is inserted into the buffer cavity 32 of the upper shell 3, the speed is gradually reduced, and the impact of the take-off process of the valve core 52 on the passive flow limiting device and a pipeline connected with the passive flow limiting device is buffered.
And pressure measuring nozzles 6 and 7 are respectively arranged on the upper shell 3 and the lower shell 4 and are respectively used for measuring the pressure of the coolant in the through hole and the pressure of the coolant in the lower shell.
An annular clamping groove is further formed in the upper shell 3, a clamping ring 54 is installed in the clamping groove, and the clamping ring 54 is used for supporting the bottom of the floating seat valve sleeve 53. In normal operation, floating valve seat 53 is supported on a snap ring 54 at a distance from valve element 52 to provide a fluid communication path.
The flow limiting device further comprises an upper end connecting flange 1 and a lower end connecting flange 2, the upper end connecting flange 1 is fixedly connected with the upper shell 3, the lower end connecting flange 2 is connected with the lower shell 4, and channels 11 and 21 for flowing of cooling agents are arranged on the upper end connecting flange 1 and the lower end connecting flange 2. The coolant flows in from the channel 21 on the lower end connecting flange 2 and flows out from the channel 11 on the upper end connecting flange 1 through the pressure-limiting shell. When a breach accident occurs, due to the increase of the coolant flow rate, a pressure difference is formed between the upper shell 3 and the lower shell 4, so that the valve core 52 is pushed to jump upwards, the valve core 52 hits the floating valve seat 53 to form a sealing contact with the floating valve seat 53, so as to close the channel, and the floating valve seat 53 is pushed to move upwards along the buffer cavity 32 so as to reduce the impact force on the upper shell 3. When the upper and lower cases 3 and 4 restore the pressure equilibrium state again, the valve body 52 descends onto the support bracket 51.
In order to further improve the sealing effect between the upper shell 3 and the lower shell 4, the upper shell 3 is connected with the lower shell 4 through bolts, and a metal sealing ring 56 is further arranged on the end face of the upper shell 3 connected with the lower shell 4.
The passive current limiting device is independent of external power such as electric power and the like, and can automatically block a break to limit medium leakage under accident working conditions under the break accident. Meanwhile, the impact on the flow-limiting device and the pipeline caused by the bounce of the valve core 52 and the water hammer effect can be effectively buffered through the design of the buffer cavity 32 and the floating valve seat 51.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A passive flow-limiting device for a cryogenic reactor coolant line, comprising:
the flow-limiting pressure-bearing shell comprises an upper shell and a lower shell, the upper shell and the lower shell are fixedly connected in a sealing mode, an installation cavity is formed in the upper shell, a buffer cavity is formed at the top of the installation cavity, a through hole communicated with the installation cavity is formed at the top of the upper shell, a lower cavity for the flowing of the coolant is formed in the lower shell, and the installation cavity is communicated with the lower cavity;
the flow limiting mechanism is arranged in the installation cavity and comprises a valve core, a supporting frame and a floating valve seat, the supporting frame is arranged at the bottom of the upper cavity and used for supporting the valve core, the floating valve seat is sleeved in the installation cavity in a sliding mode and located above the supporting frame and the valve core, and the floating valve seat is in sealing contact with the valve core and slides up and down along the buffer cavity under the pushing action of the valve core.
2. The passive flow-limiting device for a coolant line of a cryogenic reactor of claim 1, wherein the buffer chamber is an annular chamber, the floating valve seat is annular, and a top of the floating valve seat slides up and down along the buffer chamber.
3. The passive flow-limiting device for the coolant pipeline of the low-temperature reactor according to claim 2, wherein the valve core is spherical, a channel for the coolant to pass through is formed between the supporting frame and the valve core, a conical surface matched with the valve core is formed at the bottom of the floating valve seat, the bottom of the floating valve seat is spaced from the flow-limiting valve core during normal operation to form a channel for the coolant to flow through, and the conical surface at the bottom of the floating valve seat is in contact with the valve core to form a first seal during abnormal operation and push the floating valve seat to move upwards along the buffer cavity.
4. The passive flow-limiting device for a coolant pipe of a cryogenic reactor according to claim 3, wherein a rounded corner is formed at the top of the upper housing, a conical surface matching with the rounded corner is formed at the top of the floating valve seat, and a second seal is formed between the floating valve seat and the upper housing when the valve core pushes the floating valve seat to move upwards to abut against the rounded corner.
5. The passive flow restriction device for a coolant pipe of a cryogenic reactor according to claim 4, wherein the support frame includes a support ring and a plurality of support plates mounted on the support ring at intervals in a circumferential direction, the plurality of support plates being configured to support the valve core, the support ring being fixedly mounted to a bottom of the upper housing.
6. The passive flow restriction device for a coolant pipe of a cryogenic reactor according to claim 4, wherein at least one return channel is further formed in the upper housing, and a top end of the return channel communicates with the buffer chamber and a bottom end of the return channel communicates with the lower chamber and penetrates through a bottom end of the upper housing.
7. The passive flow restriction device for a coolant pipe of a cryogenic reactor according to claim 1, wherein an annular support member is further formed in the upper housing to support a bottom of the float seat valve housing.
8. The passive flow restriction device for a coolant line of a cryogenic reaction pair of claim 7, wherein an annular groove is further formed in the upper housing, and a snap ring is mounted in the groove and used for supporting the bottom of the float seat valve sleeve.
9. The passive flow limiting device for the coolant pipeline of the low-temperature reactor according to claim 1, further comprising an upper end connecting flange and a lower end connecting flange, wherein the upper end connecting flange is fixedly connected with the upper shell, the lower end connecting flange is connected with the lower shell, and the upper end connecting flange and the lower end connecting flange are respectively provided with a channel for flowing the coolant.
10. The passive flow limiting device for the cryogenic reactor coolant pipeline according to claim 1, wherein the upper shell and the lower shell are connected through bolts or welding, and a metal sealing ring is further arranged on the end face where the upper shell and the lower shell are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210106890.9A CN114550957B (en) | 2022-01-28 | Passive flow-limiting device for low-temperature reactor coolant pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210106890.9A CN114550957B (en) | 2022-01-28 | Passive flow-limiting device for low-temperature reactor coolant pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114550957A true CN114550957A (en) | 2022-05-27 |
| CN114550957B CN114550957B (en) | 2024-06-21 |
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|---|---|---|---|---|
| US20050022872A1 (en) * | 2003-07-31 | 2005-02-03 | Robison David L. | Combination shut-off and resetable excess flow valve |
| CN2714921Y (en) * | 2004-08-03 | 2005-08-03 | 赵洪恕 | Liquid self-closing flow-limiting valve |
| JP2013151951A (en) * | 2012-01-24 | 2013-08-08 | Cosmo Koki Co Ltd | Fluid control valve device |
| CN106224601A (en) * | 2016-08-29 | 2016-12-14 | 鞍山电磁阀有限责任公司 | Passive middle pressure safety injection system 3 grades of check valve specials of safety |
| CN111456978A (en) * | 2020-05-20 | 2020-07-28 | 太原市鸿煷机械设备有限公司 | Ultrahigh pressure proportional unloading valve |
| CN112228602A (en) * | 2020-10-26 | 2021-01-15 | 宁波星箭航天机械有限公司 | Helium pressure reducing valve |
| CN214305314U (en) * | 2020-12-01 | 2021-09-28 | 嘉兴德程科技股份有限公司 | Dual-purpose water valve core |
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050022872A1 (en) * | 2003-07-31 | 2005-02-03 | Robison David L. | Combination shut-off and resetable excess flow valve |
| CN2714921Y (en) * | 2004-08-03 | 2005-08-03 | 赵洪恕 | Liquid self-closing flow-limiting valve |
| JP2013151951A (en) * | 2012-01-24 | 2013-08-08 | Cosmo Koki Co Ltd | Fluid control valve device |
| CN106224601A (en) * | 2016-08-29 | 2016-12-14 | 鞍山电磁阀有限责任公司 | Passive middle pressure safety injection system 3 grades of check valve specials of safety |
| CN111456978A (en) * | 2020-05-20 | 2020-07-28 | 太原市鸿煷机械设备有限公司 | Ultrahigh pressure proportional unloading valve |
| CN112228602A (en) * | 2020-10-26 | 2021-01-15 | 宁波星箭航天机械有限公司 | Helium pressure reducing valve |
| CN214305314U (en) * | 2020-12-01 | 2021-09-28 | 嘉兴德程科技股份有限公司 | Dual-purpose water valve core |
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