CN117079842A - High-temperature gas cooled reactor side gap flow blocking device - Google Patents
High-temperature gas cooled reactor side gap flow blocking device Download PDFInfo
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- CN117079842A CN117079842A CN202310933317.XA CN202310933317A CN117079842A CN 117079842 A CN117079842 A CN 117079842A CN 202310933317 A CN202310933317 A CN 202310933317A CN 117079842 A CN117079842 A CN 117079842A
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- 230000000903 blocking effect Effects 0.000 title claims abstract description 36
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 67
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 66
- 239000010439 graphite Substances 0.000 claims abstract description 66
- 238000007789 sealing Methods 0.000 claims abstract description 55
- 238000003825 pressing Methods 0.000 claims description 19
- 239000011241 protective layer Substances 0.000 claims description 19
- 238000005096 rolling process Methods 0.000 claims description 13
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 239000002826 coolant Substances 0.000 abstract description 18
- 239000000428 dust Substances 0.000 abstract description 3
- 238000010926 purge Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 24
- 239000000919 ceramic Substances 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 239000001307 helium Substances 0.000 description 4
- 229910052734 helium Inorganic materials 0.000 description 4
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000011449 brick Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
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- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C15/00—Cooling arrangements within the pressure vessel containing the core; Selection of specific coolants
- G21C15/02—Arrangements or disposition of passages in which heat is transferred to the coolant; Coolant flow control devices
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C15/00—Cooling arrangements within the pressure vessel containing the core; Selection of specific coolants
-
- 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"
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- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The application discloses a high-temperature gas cooled reactor side gap flow blocking device, which comprises a sealing unit, a sealing unit and a sealing unit, wherein the sealing unit comprises a reactor assembly and a plugging assembly; a choke unit comprising a plurality of longitudinal choke plugs and a plurality of transverse choke plugs; the adjusting unit comprises a plurality of gear rods, a toothed ring and an electric telescopic rod. The application has the beneficial effects that the sealing unit is arranged to seal the longitudinal side flow and the transverse leakage flow of the coolant, the leakage flow of the coolant is effectively reduced by arranging the longitudinal choke plug and the transverse choke plug, the effective flow of the reactor core is increased, in addition, the choke plug is prevented from entering the reactor core area through a slot when being irradiated or cracked under pressure by the shuttle type transverse choke plug, and the toothed ring can be quickly driven to rotate by the electric telescopic rod to unlock the sealing assembly when the graphite reactor is required to be purged, so that the purging and dust removal of the interior of the reactor can be realized.
Description
Technical Field
The application relates to the technical field of reactor engineering, in particular to a high-temperature gas cooled reactor side gap flow blocking device.
Background
The pebble-bed high-temperature gas cooled reactor is an advanced reactor with inherent safety, high power generation efficiency and wide potential heat application. The reactor internal components comprise a plurality of ceramic components such as graphite blocks, carbon blocks and the like, namely reactor structural materials, and also form a flow passage of helium coolant.
The outlet temperature of the loop coolant of the pebble-bed high-temperature gas cooled reactor can reach 750-950 ℃, the temperature of the reactor core is higher, the temperature can reach 1600 ℃ in an accident state, and the temperature can also reach 1200 ℃ in a normal operation period; to reduce problems with the metal core shell and pressure boundary surfaces, coolant risers are typically disposed within the ceramic internals. The ceramic pile internal component is a blocky pile structure, and a large number of micro gaps and pore channels are distributed in the structure. This makes the flow of coolant inside the core a large uncertainty. The coolant enters the core through coolant risers disposed in the side reflector layer into a cold helium header at the top of the core and then through coolant channels open between the two graphite bricks. At the same time, part of the coolant flows to the bottom of the reactor core through the side gaps between the graphite bricks, and the part of the flow has no cooling effect on the reactor core.
In order to reduce the ineffective flow of the core coolant of the pebble-bed high-temperature gas cooled reactor and improve the core cooling efficiency, the design is designed by designing the reactor structure, and therefore, the side gap flow blocking device of the high-temperature gas cooled reactor is provided.
Disclosure of Invention
This section is intended to outline some aspects of embodiments of the application and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the application and in the title of the application, which may not be used to limit the scope of the application.
The present application has been made in view of the above-mentioned or existing problems occurring in the prior art.
Therefore, the application aims to realize labyrinth sealing and reduce side gap leakage flow by arranging radial filling plugs on the ceramic inner member.
In order to solve the technical problems, the application provides the following technical scheme: the high-temperature gas cooled reactor side gap flow blocking device comprises a reactor unit, a sealing unit and a blocking assembly, wherein the sealing unit comprises a reactor assembly and the blocking assembly is arranged in the reactor assembly;
the flow blocking unit comprises a plurality of longitudinal flow blocking plugs and a plurality of transverse flow blocking plugs arranged on one sides of the longitudinal flow blocking plugs;
the adjusting unit comprises a plurality of gear rods, a toothed ring arranged on one side of the gear rods and an electric telescopic rod arranged on one side of the toothed ring.
As a preferable scheme of the high-temperature gas cooled reactor side gap flow blocking device, the application comprises the following steps: the reactor assembly comprises a protective layer and a plurality of groups of graphite blocks arranged in the protective layer; the protective layer comprises a mounting groove arranged at the bottom of the protective layer and a first hinging seat arranged on the upper surface of the protective layer; the mounting groove comprises a compression spring arranged in the mounting groove and a plurality of fixed guide balls arranged on the inner wall of the mounting groove.
As a preferable scheme of the high-temperature gas cooled reactor side gap flow blocking device, the application comprises the following steps: the graphite block comprises a bypass channel, square grooves arranged on two sides of the graphite block, grooves arranged on one side of the square grooves, sliding grooves arranged on the upper surface of the graphite block, and trapezoid protruding blocks arranged on one side of the graphite block.
As a preferable scheme of the high-temperature gas cooled reactor side gap flow blocking device, the application comprises the following steps: the plugging assembly comprises a longitudinal sealing member and a transverse sealing rack arranged on one side of the longitudinal sealing member.
As a preferable scheme of the high-temperature gas cooled reactor side gap flow blocking device, the application comprises the following steps: the longitudinal sealing piece comprises a first inserting groove longitudinally arranged in the longitudinal sealing piece and a second inserting groove transversely arranged in the longitudinal sealing piece;
the upper half section of the first inserting groove gradually reduces from top to bottom in aperture, and the first inserting groove further comprises a spiral groove arranged on the inner wall of the first inserting groove and an annular groove communicated with the lower portion of the spiral groove.
As a preferable scheme of the high-temperature gas cooled reactor side gap flow blocking device, the application comprises the following steps: the longitudinal choke plug is in a strip square rod shape, is in clearance fit with square grooves between two adjacent graphite blocks, and can be inserted.
As a preferable scheme of the high-temperature gas cooled reactor side gap flow blocking device, the application comprises the following steps: the transverse choke plug is in a fusiform shape, the sizes of two ends are smaller than the size of the middle part, and the transverse choke plug is closely attached to a cavity formed by grooves between four adjacent graphite blocks.
As a preferable scheme of the high-temperature gas cooled reactor side gap flow blocking device, the application comprises the following steps: the gear rod comprises a pressing knob, a pressing spring arranged on one side of the pressing knob, a first inserted link arranged on one side of the pressing spring, a second inserted link arranged on one side of the first inserted link, a gear arranged on the outer wall of the second inserted link and a clamping head arranged on one side of the second inserted link;
the first inserted link rod diameter gradually decreases from top to bottom, and the first inserted link further comprises a spherical bulge arranged on the outer wall of the first inserted link rod;
the gear is matched with the transverse sealing rack.
As a preferable scheme of the high-temperature gas cooled reactor side gap flow blocking device, the application comprises the following steps: the toothed ring is an inner gear ring and comprises a plurality of rolling pulleys arranged at the bottom of the toothed ring and a second hinging seat arranged at one side of the toothed ring; the rolling pulley is attached to the upper surface of the chute and can slide.
As a preferable scheme of the high-temperature gas cooled reactor side gap flow blocking device, the application comprises the following steps: the electric telescopic rod is arranged between the first hinging seat and the second hinging seat.
The application has the beneficial effects that: according to the application, the sealing unit is arranged to seal the longitudinal side flow and the transverse leakage flow of the coolant, the longitudinal choke plug and the transverse choke plug are arranged to effectively reduce the leakage flow of the coolant and increase the effective flow of the reactor core, in addition, the shuttle-type transverse choke plug is used for preventing the choke plug from entering the reactor core area through a slot when the choke plug is cracked due to irradiation or pressure, and the toothed ring can be quickly driven to rotate by the electric telescopic rod to unlock the sealing assembly when the graphite reactor is required to be purged, so that the purging and dust removal of the interior of the reactor can be realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
FIG. 1 is a schematic diagram of the overall structure of a high temperature gas cooled reactor side gap flow blocking device;
FIG. 2 is an overall 3/4 half cross-sectional view of a high temperature gas cooled reactor side gap flow blocking device;
FIG. 3 is an enlarged view of a portion of the high temperature gas cooled reactor side gap flow blocking device at A in FIG. 2;
FIG. 4 is a schematic diagram of the seal unit and graphite blocks in the high temperature gas cooled reactor side gap flow blocking device;
FIG. 5 is a schematic structural view of a transverse choke plug in a high temperature gas cooled reactor side gap choke device.
Detailed Description
In order that the above-recited objects, features and advantages of the present application will become more readily apparent, a more particular description of the application will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present application is not limited to the specific embodiments disclosed below.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the application. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Example 1
Referring to fig. 1-2, a first embodiment of the present application provides a high temperature gas cooled reactor side gap choke device, which includes a sealing unit 100 including a reactor assembly 101 and a plugging assembly 102 disposed in the reactor assembly 101;
the choke unit 200 includes a plurality of longitudinal choke plugs 201, and a plurality of transverse choke plugs 202 disposed at one side of the longitudinal choke plugs 201;
the adjusting unit 300 includes a plurality of gear rods 301, a toothed ring 302 provided on one side of the gear rods 301, and an electric telescopic rod 303 provided on one side of the toothed ring 302.
It should be noted that, the longitudinal choke plug 201 is a rectangular graphite block, and is inserted between graphite blocks in the reactor assembly 101, the transverse choke plug 202 is a fusiform graphite block, and the two ends have small size and the middle has large size, so that the graphite plug can be prevented from breaking and entering the coolant flow channel.
Example 2
Referring to fig. 1-2 and fig. 4, a second embodiment of the present application is different from the first embodiment in that: also included, the reactor assembly 101 includes a protective layer 101a, and a plurality of sets of graphite blocks 101b disposed within the protective layer 101 a; the protective layer 101aa includes a mounting groove 101a-1-1 provided at the bottom thereof, and a first hinge base 101a-2 provided at the upper surface thereof; the installation groove 101a-1-1 includes a compression spring 101a-1a provided therein, and a plurality of fixed guide balls 101a-1b provided on the inner wall of the installation groove 101 a-1-1.
The graphite block 101b includes a bypass channel 101b-1, square grooves 101b-2 provided on both sides of the graphite block 101b, grooves 101b-3 provided on one side of the square grooves 101b-2, a chute 101b-4 provided on the upper surface of the graphite block 101b, and a trapezoidal bump 101b-5 provided on one side of the graphite block 101 b.
The closure assembly 102 includes a longitudinal seal 102a and a transverse seal rack 102b disposed on one side of the longitudinal seal 102 a.
The longitudinal seal 102a includes a first mating groove 102a-1 longitudinally disposed therein and a second mating groove 102a-2 transversely disposed within the longitudinal seal 102 a;
the upper half of the first plugging groove 102a-1 gradually decreases in aperture from top to bottom, and the first plugging groove 102a-1 further comprises a spiral groove 102a-1a provided on an inner wall thereof, and an annular groove 102a-1b provided under the spiral groove 102a-1a in communication therewith.
The longitudinal choke plug 201 is in a rectangular square rod shape, is matched with a clearance formed by square grooves 101b-2 between two adjacent graphite blocks 101b and can be inserted.
The transverse choke plug 202 is in a fusiform shape, the size of two ends of the transverse choke plug is smaller than that of the middle part, and the transverse choke plug is closely attached to a cavity formed by grooves 101b-3 between every two adjacent four graphite blocks 101 b.
The protective layer 101a is made of a high-strength high-density metal material, specifically steel or lead, and is used for protecting the reactor to prevent the graphite blocks 101b from being directly contacted with the external environment, reducing oxidation and corrosion on the graphite blocks 101b, and in addition, the protective layer can also be used for sealing radioactive substances to prevent leakage, supporting and improving stability, the graphite blocks 101b are original elements forming a ceramic internal structural member masonry, the whole shape is trapezoid, the side close to the reactor core is a short side, the side far away from the reactor core is a long side, the section of the graphite blocks 101b is in a fan-shaped ring shape, the graphite blocks 101b are divided into two layers, each layer is connected with 12 graphite blocks 101b in a surrounding mode, and the graphite blocks 101b are distributed in the protective layer 101a in a ring shape after being surrounded.
Preferably, the plugging assembly 102 is comprised of longitudinal seals 102a and transverse seal racks 102b to seal the gap between each adjacent two graphite blocks 101b, i.e., to control the structural bypass of helium gas coolant in the graphite gaps.
Preferably, the graphite block 101b is longitudinally provided with a through bypass channel 101b-1 along the central position thereof, the bypass channel 101b-1 is a bypass channel for circulating helium gas coolant, one side of the graphite block 101b is fixedly connected with a trapezoid protruding block 101b-5, and the two blocks are fixed into a whole structure, so that a through sealing area is formed between two adjacent graphite blocks 101b and is divided into a longitudinal through area and a transverse through area, a longitudinal sealing element 102a is inserted into the longitudinal through area, the section of the longitudinal sealing element 102a is attached to the inner wall of the area, after the longitudinal sealing element is inserted, the sealing of a longitudinal gap can be realized, the longitudinal sealing element 102a also comprises a first inserting groove 102a-1 longitudinally penetrating the central position of the upper surface of the longitudinal sealing element, and a through transverse second inserting groove 102a-2 positioned in the middle of the longitudinal sealing element, and the second inserting groove 102a-2 is in a curved surface 1/24 circular ring shape and faces the transverse gap between the upper graphite block 101b and the lower graphite block.
Preferably, the transverse sealing rack 102b is an arc-shaped 1/24 annular rack, and is movably arranged in the second inserting groove 102a-2, the transverse sealing rack 102b is used for sealing the gap between the upper graphite block 101 and the lower graphite block 101b, after the longitudinal sealing element 102a is inserted into alignment, the gear rod 301 inserted into the transverse sealing rack is rotated, and as the gear 301e fixedly connected with the outer wall of the gear rod 301 is meshed with the transverse sealing rack 102b, the gear rod 301 drives the transverse sealing rack 102b to rotate along the second inserting groove 102a-2 to transfer the transverse sealing rack 102b into the transverse gap which is not sealed by the longitudinal sealing element 102a, so that the complete sealing of the transverse gap is realized.
Preferably, the longitudinal choke plug 201 is a rectangular graphite block, is arranged in a gap formed by the square groove 101b-2 between two adjacent graphite blocks 101b, can be attached and inserted into the gap to realize a choke effect, and the transverse choke plug 202 is a fusiform graphite block, has small size at two ends and large size in the middle, and can prevent the graphite plug from entering the bypass channel 101b-2 after being broken; the transverse choke plug 202 is mounted in a cavity formed by the grooves 101b-3 when the four adjacent graphite blocks 101b are spliced and is tightly attached to the cavity.
Example 3
Referring to fig. 1 to 5, a third embodiment of the present application includes the above two embodiments, and is different from the above two embodiments: further, the gear lever 301 includes a pressing knob 301a, a pressing spring 301b provided on the pressing knob 301a side, a first insert lever 301c provided on the pressing spring 301b side, a second insert lever 301d provided on the first insert lever 301c side, a gear 301e provided on the outer wall of the second insert lever 301d, and a chuck 301f provided on the second insert lever 301d side;
the first insert rod 301c gradually reduces from top to bottom in diameter, and the first insert rod 301c further comprises a spherical protrusion 301c-1 arranged on the outer wall of the first insert rod;
the gear 301e mates with the transverse seal rack 102b.
The toothed ring 302 is an inner gear ring, and comprises a plurality of rolling pulleys 302a arranged at the bottom of the inner gear ring and a second hinging seat 302b arranged at one side of the toothed ring 302; the rolling pulley 302a is attached to the upper surface of the chute 101b-4 and is slidable.
The electric telescopic rod 303 is disposed between the first hinge base 101a-2 and the second hinge base 302 b.
It should be noted that, the pressing knob 301a is disc-shaped, the circumference of the pressing knob 301a is provided with a longitudinal tooth shape, the pressing knob 301a is fixedly connected with the first inserting rod 301c through a short rod, the short rod is externally surrounded with a pressing spring 301b for buffering the pressing knob 301a, the first inserting rod 301c is fixedly connected with the second inserting rod 301d into a whole, the outer wall of the second inserting rod 301d is fixedly connected with a gear 301e, and the clamping head 301f is fixedly connected with the other side of the second inserting rod 301 d.
Preferably, the diameter of the first insert rod 301c gradually decreases from top to bottom until the diameter of the first insert rod is consistent with that of the second insert rod 301d, the diameter of the upper insert rod is about 1.5 times that of the lower insert rod, and a fixed spherical protrusion 301c-1 is formed on the surface side of the first insert rod 301c, which is close to the position of the gear 301 e. The clamping head 301f is fixedly connected to the end position of the second inserting rod 301d, the clamping head 301f is in an irregular convex sphere shape, a spiral annular groove is formed in the outer wall of the sphere of the clamping head 301f, the groove is meshed with a fixed guide ball 101a-1b fixedly connected to the inner wall of the mounting groove 101a-1, the clamping head 301f can be inserted into the mounting groove 101a-1 through the rotary gear rod 301, and can continue to rotate without being influenced after rotating into the mounting groove 101a-1, once the clamping head 301f is reversed, the gear rod 301 is driven to scratch the mounting groove 101a-1, and the structure is quite suitable for a scene that the transverse sealing rack 102b is still required to be rotated after the insertion of the gear rod 301 is completed.
Preferably, the longitudinal first inserting groove 102a-1 is divided into an upper half section and a lower half section along the transverse gap between the upper and lower graphite blocks 101b, wherein the diameter of the upper half section gradually decreases from top to bottom, and the diameter of the upper section is about 1.5 times of the diameter of the lower section and slightly larger than the diameter of the first inserting rod 301 c. The inner wall of the upper half section of the first inserting groove 102a-1 is also provided with a spiral groove 102a-1a, the spiral groove 102a-1a is also provided with a smooth round angle from top to bottom, the lower part of the spiral groove 102a-1a is also provided with an annular groove 102a-1b, the annular groove 102a-1b is communicated with the spiral groove 102a-1a through a section of longitudinal groove, when the gear rod 301 is inserted into the first inserting groove 102a-1, the spherical bulge 301c-1 fixedly connected to the outer wall of the gear rod 301 is gradually meshed with the spiral groove 102a-1a, the direction of the spherical bulge is adjusted to be fixed in the direction of the spiral groove 102a-1a, the bulge slides into the annular groove 102a-1b after reaching the end point of the spiral groove 102a-1a, and is limited in the annular groove 102a-1b, and the position of the gear 301e and the transverse sealing rack 102b is always at the bottom position of the spiral groove 102a-1a, so that the problem of blocking the gear rod 301 caused by blocking between two teeth and teeth can be well avoided.
Preferably, the toothed ring 302 is a circular ring-shaped inner gear ring, i.e. teeth are opened in the inward direction of the ring, four rolling pulleys 302a are uniformly distributed and fixedly connected under the toothed ring 302, and the rolling pulleys 302a roll on the sliding grooves 101b-4
On the upper part, because the width of the rolling pulley 302a is smaller than the groove width of the sliding groove 101b-4, the rolling pulley 302a can roll above the sliding groove 101b-4, and it is noted that the sliding groove 101b-4 is only arranged on the upper surface of the corresponding graphite block 101b, the toothed ring 302 can be driven to rotate through the rotation of the rolling pulley 302a, and when the toothed ring 302 rotates, all the gear rods 301 are driven to synchronously rotate due to the fact that the gear 302 is meshed with the pressing knobs 301a on all the gear rods 301 during rotation, and in the rotation process, the gear 301e is synchronously driven to be meshed with the transverse sealing racks 102b to drive the transverse sealing racks 102b to extend out to be attached to the wall of the graphite block 101b, so that the transverse sealing of the gap between the upper graphite block 101b and the lower graphite block 101b is realized.
Preferably, the upper surface of the protective layer 101aa is further provided with a first hinge seat 101a-2, and meanwhile, the outer side of the toothed ring 302 is fixedly connected with a second hinge seat 302b, and both ends of the electric telescopic rod 303 are hinged through the two hinge seats at the same time, so that when the electric telescopic rod 303 is driven to extend through an external circuit, the electric telescopic rod 303 pushes the second hinge seat 303b because the first hinge seat 101a-2 is fixed on the outer protective layer 101a, that is, the toothed ring 302 is connected with the sliding groove 101b-4 through rolling between the bottom rolling pulley 302a and the sliding groove 101b-4 to realize the integral rotation of the toothed ring, otherwise, the electric telescopic rod 303 is contracted in the same way.
When the graphite block 101b is used, the graphite block 101b is placed into the protective layer 101a along the circumferential array, the graphite block 101b is placed into the first layer and then sequentially placed into the transverse choke plug 202 along the groove 101b-3, meanwhile, the graphite block 101b of the second layer is placed into the gap formed by the square grooves 101b-2 among the graphite blocks on the upper surface, namely, the choke unit placement is completed, then the longitudinal sealing piece 102a is placed into the dovetail-shaped notch formed among the trapezoid convex blocks 101b-5 of the graphite block 101b, the longitudinal sealing is realized, the gear rod 301 is then inserted into the first inserting groove 102a-1 of the longitudinal sealing piece 102a, the clamping head 301f is inserted into the mounting groove 101a-1 through manual pressing, then the electric telescopic rod 303 can be started to push the toothed ring 302 to rotate, all the gear rods 301 are synchronously rotated through meshing, and meshing of the toothed ring 302 synchronously drives the transverse sealing racks 102b to extend along the wall of the graphite block 101b, and the transverse sealing of the gap between the upper and lower graphite blocks 101b is correspondingly contracted.
In summary, the sealing unit 100 is arranged to seal the longitudinal side flow and the transverse leakage flow of the coolant, the longitudinal choke plug 201 and the transverse choke plug 202 are arranged to effectively reduce the leakage flow of the coolant and increase the effective flow of the reactor core, and the shuttle-type transverse choke plug 202 is used for preventing the choke plug from entering the reactor core area through a slot when the choke plug is cracked due to irradiation or pressure, and the electric telescopic rod 303 can be used for rapidly driving the toothed ring 302 to rotate to unlock the sealing assembly when the graphite reactor is required to be purged, so that the purging and dust removal of the interior of the reactor can be realized.
It is important to note that the construction and arrangement of the application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of present application. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present applications. Therefore, the application is not limited to the specific embodiments, but extends to various modifications that nevertheless fall within the scope of the appended claims.
Furthermore, in order to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those not associated with the best mode presently contemplated for carrying out the application, or those not associated with practicing the application).
It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.
It should be noted that the above embodiments are only for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present application may be modified or substituted without departing from the spirit and scope of the technical solution of the present application, which is intended to be covered in the scope of the claims of the present application.
Claims (10)
1. The utility model provides a high temperature gas cooled reactor backlash choked flow device which characterized in that: comprising the steps of (a) a step of,
a sealing unit (100) comprising a reactor assembly (101), and a plugging assembly (102) disposed within the reactor assembly (101);
a choke unit (200) including a plurality of longitudinal choke plugs (201), and a plurality of transverse choke plugs (202) provided on one side of the longitudinal choke plugs (201);
the adjusting unit (300) comprises a plurality of gear rods (301), a toothed ring (302) arranged on one side of the gear rods (301), and an electric telescopic rod (303) arranged on one side of the toothed ring (302).
2. The high temperature gas cooled reactor side gap flow blocking device of claim 1, wherein: the reactor assembly (101) comprises a protective layer (101 a), and a plurality of groups of graphite blocks (101 b) disposed within the protective layer (101 a); the protective layer (101 a) comprises a mounting groove (101 a-1) arranged at the bottom of the protective layer and a first hinging seat (101 a-2) arranged on the upper surface of the protective layer; the mounting groove (101 a-1) comprises a compression spring (101 a-1 a) arranged in the mounting groove, and a plurality of fixed guide balls (101 a-1 b) arranged on the inner wall of the mounting groove (101 a-1).
3. The high temperature gas cooled reactor side gap flow blocking device of claim 2, wherein: the graphite block (101 b) comprises a bypass channel (101 b-1), square grooves (101 b-2) arranged on two sides of the graphite block (101 b), grooves (101 b-3) arranged on one side of the square grooves (101 b-2), sliding grooves (101 b-4) arranged on the upper surface of the graphite block (101 b), and trapezoid protruding blocks (101 b-5) arranged on one side of the graphite block (101 b).
4. The high temperature gas cooled reactor side gap flow blocking device of claim 3, wherein: the closure assembly (102) includes a longitudinal seal (102 a), and a transverse seal rack (102 b) disposed on one side of the longitudinal seal (102 a).
5. The high temperature gas cooled reactor side gap flow blocking device of claim 4, wherein: the longitudinal sealing element (102 a) comprises a first inserting groove (102 a-1) longitudinally arranged in the longitudinal sealing element, and a second inserting groove (102 a-2) transversely arranged in the longitudinal sealing element (102 a);
the upper half section of the first inserting groove (102 a-1) gradually reduces from top to bottom in aperture, the first inserting groove (102 a-1) further comprises a spiral groove (102 a-1 a) arranged on the inner wall of the first inserting groove, and an annular groove (102 a-1 b) communicated with the lower part of the spiral groove (102 a-1 a).
6. The high temperature gas cooled reactor side gap flow blocking device of claim 5, wherein: the longitudinal choke plug (201) is in a strip square rod shape, is in clearance fit with square grooves (101 b-2) between two adjacent graphite blocks (101 b) and can be inserted.
7. The high temperature gas cooled reactor side gap flow blocking device of claim 6, wherein: the transverse choke plug (202) is in a fusiform shape, the sizes of two ends of the transverse choke plug are smaller than the size of the middle part of the transverse choke plug, and the transverse choke plug is closely attached to a cavity formed by grooves (101 b-3) between every two adjacent four graphite blocks (101 b).
8. The high temperature gas cooled reactor side gap flow blocking device according to any one of claims 5 to 7, wherein: the gear rod (301) comprises a pressing knob (301 a), a pressing spring (301 b) arranged on one side of the pressing knob (301 a), a first inserting rod (301 c) arranged on one side of the pressing spring (301 b), a second inserting rod (301 d) arranged on one side of the first inserting rod (301 c), a gear (301 e) arranged on the outer wall of the second inserting rod (301 d), and a clamping head (301 f) arranged on one side of the second inserting rod (301 d);
the first inserted link (301 c) gradually reduces from top to bottom, and the first inserted link (301 c) further comprises a spherical protrusion (301 c-1) arranged on the outer wall of the first inserted link;
the gear (301 e) cooperates with the transverse sealing rack (102 b).
9. The high temperature gas cooled reactor side gap flow blocking device of claim 8, wherein: the toothed ring (302) is an inner gear ring and comprises a plurality of rolling pulleys (302 a) arranged at the bottom of the inner gear ring and a second hinging seat (302 b) arranged at one side of the toothed ring (302); the rolling pulley (302 a) is attached to the upper surface of the chute (101 b-4) and can slide.
10. The high temperature gas cooled reactor side gap flow blocking device of claim 9, wherein: the electric telescopic rod (303) is arranged between the first hinging seat (101 a-2) and the second hinging seat (302 b).
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| CN202310933317.XA CN117079842B (en) | 2023-07-27 | High-temperature gas cooled reactor side gap flow blocking device |
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| CN202310933317.XA CN117079842B (en) | 2023-07-27 | High-temperature gas cooled reactor side gap flow blocking device |
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