CN116344074A - Top shield structure for reactor - Google Patents
Top shield structure for reactor Download PDFInfo
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- CN116344074A CN116344074A CN202310003185.0A CN202310003185A CN116344074A CN 116344074 A CN116344074 A CN 116344074A CN 202310003185 A CN202310003185 A CN 202310003185A CN 116344074 A CN116344074 A CN 116344074A
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- annular cavity
- shaped
- annular
- shielding
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- 238000009423 ventilation Methods 0.000 claims abstract description 23
- 230000002787 reinforcement Effects 0.000 claims abstract description 20
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 17
- 239000003351 stiffener Substances 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 15
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 11
- 229910052708 sodium Inorganic materials 0.000 claims description 11
- 239000011734 sodium Substances 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 7
- 102000005393 Sodium-Potassium-Exchanging ATPase Human genes 0.000 description 4
- 108010006431 Sodium-Potassium-Exchanging ATPase Proteins 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 2
- 239000000112 cooling gas Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000011490 mineral wool Substances 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C13/00—Pressure vessels; Containment vessels; Containment in general
- G21C13/02—Details
- G21C13/022—Ventilating arrangements
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C13/00—Pressure vessels; Containment vessels; Containment in general
- G21C13/02—Details
- G21C13/024—Supporting constructions for pressure vessels or containment vessels
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C13/00—Pressure vessels; Containment vessels; Containment in general
- G21C13/10—Means for preventing contamination in the event of leakage, e.g. double wall
-
- 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)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Embodiments of the present application provide a roof shield structure for a reactor, comprising: the shielding box body and the ventilation hood arranged on the shielding box body. The shielding box includes: the annular cavity, a plurality of gusset, a plurality of fan-shaped shield. A plurality of vertical air channels are formed in the annular cavity and are used for allowing a plurality of main container connecting pipes of the reactor to pass through. The rib plates are radially arranged in the annular cavity to divide the annular cavity into a plurality of mutually independent fan-shaped cavities. The fan-shaped shielding bodies are arranged in a fan-shaped cavity, and a horizontal air duct is formed in each fan-shaped shielding body. The shielding case further includes: at least one reinforcement is arranged in the annular cavity, the top wall of the annular cavity and the sector shielding body form yielding holes for allowing the reinforcement to pass through, and the reinforcement is connected with the top wall, the bottom wall and the sector shielding body of the annular cavity respectively. The annular top plate can be reduced in deformation degree by arranging the reinforcing piece in the annular cavity.
Description
Technical Field
The invention relates to the technical field of cores, in particular to a reactor top shielding structure for a reactor.
Background
When the fast reactor runs, a large amount of radiant heat can be generated, if the radiant heat is not discharged in time, the radiant protection function of the reactor top shielding can be affected, and high-temperature damage is caused to operators and equipment on the reactor, so that the reactor top shielding structure with an air channel formed inside is required to be arranged on the reactor, and the radiant heat is discharged in time by sending cooling air.
Disclosure of Invention
The inventors of the present application found that the weld between the vertical duct and the top plate of the stack top shielding structure was cracked during use. Further studies by the inventors of the present application have found that this is due to insufficient strength of the roof shield structure, resulting in slight deformation of the roof plate, thereby causing cracking of the weld between the vertical duct and the roof plate.
Therefore, the embodiment of the application provides a top shielding structure for a reactor, so as to avoid the occurrence of cracks on a welding seam between a vertical air duct and a top plate of the top shielding structure in the using process.
The pile top shielding structure provided by the embodiment of the application comprises: the shielding box and set up the ventilation hood on the shielding box, the shielding box includes:
the annular cavity is internally provided with a plurality of vertical air channels extending vertically and used for a plurality of main container connecting pipes of the reactor to pass through;
the rib plates are arranged in the annular cavity in the radial direction so as to divide the annular cavity into a plurality of mutually independent fan-shaped cavities; and
a plurality of fan-shaped shielding bodies, each fan-shaped shielding body is arranged in one fan-shaped cavity, a horizontal air duct extending along the horizontal direction is formed in each fan-shaped shielding body,
wherein, shielding box still includes: at least one reinforcement is arranged in the annular cavity, the top wall of the annular cavity and the sector shielding body form yielding holes for allowing the reinforcement to pass through, and the reinforcement is connected with the top wall, the bottom wall and the sector shielding body of the annular cavity respectively.
As previously mentioned, the inventors of the present application have found that the weld between the vertical duct and the annular top plate of the stack top shield structure may crack during use. Further studies by the inventors of the present application have found that this is due to insufficient strength of the stack top shielding structure, resulting in slight deformation of the annular top plate, thereby causing cracking of the weld between the vertical duct and the annular top plate. The support of the annular top plate is reinforced by the reinforcing piece arranged in the annular cavity, so that the annular top plate can be prevented from being deformed or at least the deformation degree of the annular top plate can be reduced.
Further, this application is through making annular roof set up the hole of stepping down, makes the reinforcement meet through hole and annular roof of stepping down, can avoid increasing the holding power to annular roof after the reinforcement is heated expansion to result in annular roof to take place to show to warp.
Drawings
Other objects and advantages of the present invention will become apparent from the following description of the invention with reference to the accompanying drawings, which provide a thorough understanding of the present invention.
FIG. 1 is a top view of a top shield structure according to one embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along the line A-A in FIG. 1;
FIG. 3 is a partial schematic view of a shielding cage according to one embodiment of the present invention;
FIG. 4 is a cross-sectional view of a horizontal tunnel according to one embodiment of the invention;
fig. 5 and 6 show partial cross-sectional views of the reinforcement provided in the shielding cage in different configurations, respectively;
FIG. 7 is an enlarged partial view of region B of FIG. 2;
FIG. 8 is a schematic structural view of an annular seal assembly according to one embodiment of the present invention;
FIG. 9 is a cross-sectional view of an annular seal assembly according to one embodiment of the present invention.
It should be noted that the drawings are not necessarily to scale, but are merely shown in a schematic manner that does not affect the reader's understanding.
Reference numerals illustrate:
1. a ventilation hood;
10. a shielding box; 101. a fan-shaped cavity; 1011. a first fan-shaped cavity; 1012. a second fan-shaped cavity; 1013. a third fan-shaped cavity; 1014. a fourth fan-shaped cavity; 102. a small fan-shaped region; 103. a large sector area;
11. a bottom wall; 110. air holes; 12. a top wall; 13. an outer ring body; 14. an inner ring body; 15. rib plates; 151. a vent hole;
16. a fan-shaped shield; 160. an upper horizontal air duct; 161. a horizontal air duct; 162. a lower horizontal air duct;
171. the sodium filling and discharging connecting pipe air duct; 172. The thermometer is connected with the air duct; 1721. A mounting cylinder; 173. an in-stack ionization chamber air duct; 174. An intermediate heat exchanger air duct; 175. An independent heat exchanger air duct; 176. a loop sodium pump air duct; 177. the charging elevator takes over the air duct; 178. the discharging hoister is connected with the air duct;
18. a ventilation regulating valve; 181. a second vertical air duct;
19. a shielding cylinder;
20. a reinforcing member; 20', a second reinforcement;
21. an outer cylinder; 22. an inner cylinder; 23. an upper end plate; 24. a lower end plate; 25. a concrete layer; 26. a steel plate layer; 27. reinforcing ribs;
30. an annular seal assembly; 31. an annular lower cover; 32. an annular upper cover; 33. a slip ring; 331. a stepped groove; 34. a seal ring; 35. a pressing plate; 36. and a connecting piece.
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 of the embodiments of the present invention. It will be apparent that the described embodiments are one embodiment, but not all embodiments, of the present invention. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present invention fall within the protection scope of the present invention.
It is to be noted that unless otherwise defined, technical or scientific terms used herein should be taken in a general sense as understood by one of ordinary skill in the art to which the present invention belongs.
In the description of the embodiments of the present invention, the meaning of "plurality" is at least two, for example, two, three, etc., unless explicitly defined otherwise.
The reactor top shielding structure (or referred to as a ventilation distribution structure) provided by the embodiments of the present application is used in a reactor, such as a fast reactor. In one embodiment, the top of stack shielding structure is used with a sodium cooled fast stack.
Referring to fig. 1 to 3, a stack top shielding structure of an embodiment of the present invention includes: a ventilation hood 1 and a shielding box 10. The ventilation hood 1 is connected to the shielding case 10. The ventilation hood 1 communicates with an air inlet duct (not shown in the drawings) to introduce cooling air into the ventilation hood 1.
The shield case 10 includes: an annular cavity, a plurality of ribs 15, and a plurality of fan-shaped shields 16.
The annular cavity consists of an inner ring body 14, an outer ring body 13, an annular top plate and an annular bottom plate.
A plurality of vertical air channels extending vertically are formed in the annular cavity and are used for allowing a plurality of main container connecting pipes of the reactor to pass through. It will be readily appreciated that an annular flow passage for the flow of cooling gas is formed between the main vessel nipple and the vertical duct to cool the main vessel nipple.
In some embodiments, the vertical air channels may include an intermediate heat exchanger air channel 174, a stand alone heat exchanger air channel 175, a loop sodium pump air channel 176, a thermometer take-over air channel 172, a charge-drain sodium take-over air channel 171, a level gauge take-over air channel, an in-stack ionization chamber air channel 173, a charge take-over air channel, a discharge take-over air channel, and the like. A plurality of air channels extending obliquely, such as a loading elevator take-over air channel 177 and a discharging elevator take-over air channel 178, can also be formed in the annular cavity.
A plurality of rib plates 15 are arranged in the annular cavity in the radial direction so as to divide the annular cavity into a plurality of mutually independent sector-shaped cavities 101. In some embodiments, the number of the rib plates 15 may be plural, for example, may be 10 or more. In the illustrated embodiment, the number of the rib plates 15 is 15, and the annular cavities are separated by 15 rib plates 15 to form 16 mutually independent fan-shaped cavities 101.
The rib 15 may be welded to the annular cavity. Specifically, referring to fig. 1 and 3, the rib 15 may be welded at an upper end to the top wall 12 (i.e., the lower surface of the annular top plate) of the annular cavity, at a lower end to the bottom wall 11 (i.e., the upper surface of the annular bottom plate) of the annular cavity, at a radially inner end to the radially inner wall (i.e., the radially outer surface of the inner ring 14) of the annular cavity, and at a radially outer end to the radially outer wall (i.e., the radially inner surface of the outer ring 13) of the annular cavity. It will be readily appreciated that some of these webs 15 are connected to a vertical tunnel, in other words, the vertical tunnel divides the web 15 into two sections.
Each fan-shaped shielding body 16 is disposed in one fan-shaped cavity 101, and a horizontal air duct 161 extending in the horizontal direction is formed inside each fan-shaped shielding body 16. In some embodiments, the sector shield 16 may include 6 steel slabs, 4 concrete slabs and 1 slag wool. Specifically, the fanning shield 16 may include, in order from bottom to top, a concrete layer, a steel sheet layer, a slag wool layer, a steel sheet layer, an air layer (i.e., the horizontal air duct 161), a steel sheet layer, a concrete layer, and a steel sheet layer. The concrete layer may be a serpentine concrete composition. It will be readily appreciated that in other embodiments, the fan-shaped shield 16 may have other forms of shielding structures.
In the embodiment of the present application, the axes of the larger diameter vertical air channels (such as the intermediate heat exchanger air channel 174, the independent heat exchanger air channel 175, the primary sodium pump air channel 176 and the in-stack ionization chamber air channel 173) are located on the rib plate 15, and the rib plate 15 is divided into two sections by the vertical air channels and connected with the two sections.
Vertical air channels with smaller diameters (such as a thermometer connecting pipe air channel 172, a sodium charging and discharging connecting pipe air channel 171, a liquid level meter connecting pipe air channel, a charging connecting pipe air channel, a discharging connecting pipe air channel and the like) are positioned in one fan-shaped cavity 101 and are not connected with the rib plate 15.
In particular, the roof shield structure of the embodiments of the present application further includes at least one stiffener 20 disposed within the annular cavity. The top wall 12 of the annular cavity, the sector shield 16 respectively form relief holes for allowing the stiffener 20 to pass through, the stiffener 20 being connected to the top wall 12, the bottom wall 11 and the sector shield 16 respectively of the annular cavity.
As previously mentioned, the inventors of the present application have found that the weld between the vertical duct and the annular top plate of the stack top shield structure may crack during use. Further studies by the inventors of the present application have found that this is due to insufficient strength of the stack top shielding structure, resulting in slight deformation of the annular top plate, thereby causing cracking of the weld between the vertical duct and the annular top plate. By providing the stiffener 20 in the annular cavity, the support for the annular top plate is strengthened, and deformation of the annular top plate can be avoided or at least the degree of deformation of the annular top plate can be reduced.
Further, the annular top plate is provided with the abdication hole, so that the reinforcing piece 20 is connected with the annular top plate through the abdication hole, the supporting force to the annular top plate can be prevented from being increased after the reinforcing piece 20 is heated and expanded, and the annular top plate is caused to be obviously deformed.
Referring to fig. 3, the number of the reinforcing members 20 may be plural. Some reinforcing members 20 are positioned in a fan-shaped cavity 101 and are not connected with the rib plates 15; the axis of some reinforcing members 20 is located on the rib plate 15, and the reinforcing members 20 divide the rib plate 15 into two sections and are connected with the two sections.
In the embodiment of the present application, the axes of the larger diameter vertical air channels (such as the intermediate heat exchanger air channel 174, the independent heat exchanger air channel 175, the primary sodium pump air channel 176 and the in-stack ionization chamber air channel 173) are located on the rib plate 15, and the rib plate 15 is divided into two sections by the vertical air channels and connected with the two sections.
Referring to fig. 5 and 6, in some embodiments, the stiffener 20 includes: an outer cylinder 21 and a shield. The outer cylinder 21 extends upwardly from the bottom wall 11 of the annular cavity to a relief hole in the top wall 12 of the annular cavity. The shield is disposed within the outer cylinder 21. Wherein the outer cylinder 21 is connected to the top wall 12, the bottom wall 11 and the sector shield 16 of the annular cavity.
It will be readily appreciated that when the stiffener 20 is located within a scalloped cavity 101, and is not connected to the web 15, the scalloped shield 16 within the scalloped cavity 101 has a relief hole for the outer barrel 21 to pass through. At this time, the outer cylinder 21 is connected to only one sector shield 16. When the axis of the reinforcing member 20 is located on the rib plate 15, the fan-shaped shielding bodies 16 on both sides of the rib plate 15 together form a yielding hole for the outer cylinder 21 to pass through. At this time, the outer cylindrical body 21 is connected to the two sector shields 16.
In some embodiments, the shield comprises: an inner cylinder 22, an upper end plate 23, a lower end plate 24, and a shield. The inner cylinder 22 is arranged in the outer cylinder 21, the height of the inner cylinder 22 is smaller than that of the outer cylinder 21, the top end of the inner cylinder 22 is flush with the top end of the outer cylinder 21, and a space exists between the bottom end of the inner cylinder 22 and the bottom end of the outer cylinder 21. The upper end plate 23 and the lower end plate 24 are respectively disposed at the top and bottom of the inner cylinder 22, and form an accommodating space together with the inner cylinder 22. The shielding body is arranged in the accommodating space. Since the horizontal air duct is not provided in the shield, when the thickness of the shield is smaller than that of the fan-shaped shield 16, the shielding effect of the shield can be equivalent to that of the fan-shaped shield 16. By the arrangement, the weight of the shielding body can be reduced, and the load of the annular cavity is reduced.
The outer cylinder 21, the inner cylinder 22, the upper end plate 23, and the lower end plate 24 are all made of steel.
In some embodiments, the shield comprises: the steel plate layers 26 and the concrete layers 25 are alternately arranged. The concrete layer 25 may be composed of serpentine concrete. Since the concrete generates gas during use, air holes 110 may be provided on the surface of the annular bottom plate corresponding to the radially inner side of the outer cylinder 21, so that the gas released from the concrete can flow to the lower side of the shielding case 10 through the air holes 110.
In some embodiments, the plurality of stiffeners 20 includes a plurality of first stiffeners 20 and at least one second stiffener 20'. The diameter of the first reinforcement 20 is smaller than the diameter of the second reinforcement 20', wherein the shielding of the second reinforcement 20' further comprises a reinforcement rib 27 connecting the upper end plate 23 and the lower end plate 24. Thereby, the structural strength of the shield is improved.
A ventilation regulator (not shown) is installed on a part of the vertical duct for directly introducing the cooling air in the ventilation hood 1 into the vertical duct. Such vertical air ducts are, for example, independent heat exchangers and intermediate heat exchangers. Since more components are required for the heat exchanger to dissipate heat, the cooling air in the hood 1 is introduced directly into the vertical duct through the ventilation regulator.
The remaining part of the vertical air duct is not provided with a ventilation regulator. The side wall of the vertical air duct is provided with a circle of ventilation holes 151, and cooling air in the horizontal air duct 161 enters the vertical air duct through the ventilation holes 151.
In some embodiments, a plurality of second vertical air channels 181 are formed in the annular cavity to extend vertically, and the second vertical air channels 181 communicate with the horizontal air channels 161 without continuing downward. A ventilation adjusting valve 18 is installed on the second vertical air duct 181 for introducing cooling air in the ventilation hood 1 into the horizontal air duct 161. Cooling air flowing out of each vertical air duct enters the stacking pit, and the radiant heat of the main container cone top cover and each connecting pipe on the main container cone top cover is taken away through the stacking pit exhaust outlet.
In some embodiments, the plurality of fan-shaped cavities 101 includes a first fan-shaped cavity 1011, wherein the sodium charge and discharge nozzle air duct 171 is disposed within the first fan-shaped cavity 1011. The rib plates 15 on both sides of the first fan-shaped cavity 1011 are respectively provided with ventilation holes 151, so that cooling air of the horizontal air channels 161 of the adjacent fan-shaped cavities 101 can enter the horizontal air channels 161 of the first fan-shaped cavity 1011.
Since the sodium charge and discharge nozzle air duct 171 has a low requirement for heat dissipation, the second vertical air duct is not disposed in the first fan-shaped cavity 1011, but cooling air is introduced from the horizontal air duct 161 of the adjacent fan-shaped cavity 101 to the horizontal air duct 161 of the first fan-shaped cavity 1011 through the ventilation hole 151.
The space of the first fan-shaped cavity 1011 is relatively small, for example, the central angle corresponding to the first fan-shaped cavity 1011 is about 10-20 °. Because the first fan-shaped cavity 1011 has a smaller volume, a better cooling effect can be achieved when cooling air is introduced by using the horizontal air duct 161 of the adjacent fan-shaped cavity 101.
In some embodiments, only two vertical air channels, a sodium charge and discharge nozzle air channel 171 and a thermometer nozzle air channel 172, are disposed within the first fan-shaped cavity 1011.
Referring to fig. 4, the number of the second reinforcing members 20 'in the shielding case 10 is two, and the two second reinforcing members 20' are symmetrically disposed with respect to a vertical plane N passing through the axis O of the annular chamber and the axis of the sodium charge and discharge nozzle air duct 171. In the embodiment of the present application, the shielding case 10 may also be symmetrically disposed with respect to the vertical plane N.
The line connecting the axes of the two second stiffeners 20' divides the annular cavity into a large sector 103 and a small sector 102, the first stiffener 20 being located entirely in the large sector 103. Referring to fig. 4, in-stack ionization chamber air duct 173, charge elevator take-over air duct 177, discharge elevator take-over air duct 178, and the like are located in small sector area 102. The inventors of the present application found that the load on the annular top plate above the small scalloped region 102 was light, and therefore the annular top plate of this region was not easily deformed, and thus the first reinforcing member 20 and the second reinforcing member 20' were all located in the large scalloped region 103.
With reference to fig. 1, 3 and 4, there is no ventilation hood 1 above the third fan-shaped cavity 1013 in the middle of the small fan-shaped region 102 and the fourth fan-shaped cavities 1014 on both sides thereof, and therefore the cooling air in these fan-shaped cavities 101 needs to be introduced from the adjacent second fan-shaped cavities 1012. Accordingly, referring to fig. 1, each second fan-shaped chamber 1012 is provided with 2 second vertical air passages 181, and cooling gas is introduced into the second fan-shaped chamber 1012 by means of two ventilation regulating valves 18. The other fan chambers 101 (except for the first fan chamber 1011, the second fan chamber 1012, the third fan chamber 1013, and the fourth fan chamber 1014) all have 1 second vertical air passage, i.e., only one ventilation adjusting valve 18 is provided. Through calculation of a thermal fluid, the stack top shielding structure can realize air distribution of each vertical air channel, and the temperature of the upper surface of the stack top shielding structure is lower than 45 ℃.
Referring to fig. 7, in some embodiments, an annular seal assembly 30 is provided between the vertical air duct and the main container adapter for preventing cooling air from flowing outwardly from above the vertical air duct. A mounting barrel 1721 may be disposed in the vertical air duct, and a sealing assembly is mounted on an upper end surface of the mounting barrel 1721.
Referring to fig. 8 and 9, in some embodiments, the annular seal assembly 30 includes: a ring-shaped lower cover 31, a ring-shaped upper cover 32, a sliding ring 33, and a seal ring 34.
The annular upper cover 32 is connected with the annular lower cover 31 to form an annular cavity. The radially outer end of the annular cavity is closed and the radially inner end is open. The sliding ring 33 is slidably disposed in the annular cavity in a radial direction, wherein an inner diameter of the sliding ring 33 is smaller than an inner diameter of the annular cavity, and an outer diameter of the sliding ring 33 is smaller than an outer diameter of the annular cavity. The sealing ring 34 is arranged on the radial inner side of the sliding ring 33, and the sealing ring 34 is used for being sleeved on the main container connecting pipe so as to be in sealing connection with the main container connecting pipe. It will be readily appreciated that the sealing ring 34 projects radially inwardly of the sliding ring 33.
In the annular sealing assembly 30 of the embodiment of the application, since the sliding ring 33 can be slidably arranged in the annular cavity along the radial direction, when the main container connecting pipe is displaced in the horizontal direction, the sliding ring 33 can drive the sealing ring 34 to correspondingly and horizontally displace, so that the tightness of the vertical air duct is not affected, and the deformation influence on the annular top plate caused by the displacement of the main container connecting pipe in the horizontal direction can be reduced.
The sealing ring 34 may be a rubber ring. The annular seal assembly 30 further includes: and a pressing plate 35 for fixing the seal ring 34. Because main container takeover and rubber circle sealing connection, consequently, when main container takeover exists the displacement in vertical direction, main container takeover can be for the rubber circle along vertical movement to can not influence the leakproofness in vertical wind channel, also can reduce because main container takeover exists the displacement in vertical direction and the deformation influence that causes annular roof.
The radially inner side of the sliding ring 33 is formed with two continuous stepped grooves, the stepped groove located below is used for placing the seal ring 34, and the stepped groove 331 located above is used for mounting the pressing plate 35 to hold the seal ring 34 in the stepped groove located below.
In some embodiments, the annular upper cover 32 may be detachably combined from two semi-annular upper covers. Referring to fig. 8, the two semi-annular upper covers may be connected together by a connector 36. In some embodiments, the sliding ring 33 is formed by detachably combining two semi-rings, thereby facilitating disassembly.
In some embodiments, the shielding cage 10 may further comprise: the shielding cylinder 19 is movably arranged in the vertical air duct. The shielding cylinder 19 is sleeved on the main container connecting pipe. The internal diameter of the shielding cylinder 19 is smaller than that of the vertical air duct, and the external diameter of the shielding cylinder 19 is larger than that of the vertical air duct, so that stepped shielding is formed between the shielding cylinder 19 and the vertical air duct, and the shielding effect is improved. It will be readily appreciated that some vertical air channels are provided with shielding drums 19, and some vertical air channels may not be provided with shielding drums 19.
In some embodiments, an upper horizontal air channel 160, also referred to as a first horizontal air channel, is formed between the fan-shaped shield 16 and the annular top plate, and a lower horizontal air channel 162, also referred to as a third horizontal air channel, is formed at the bottom of the annular bottom plate.
It should also be noted that, in the embodiments of the present invention, the features of the embodiments of the present invention and the features of the embodiments of the present invention may be combined with each other to obtain new embodiments without conflict.
The present invention is not limited to the above embodiments, but the scope of the invention is defined by the claims.
Claims (10)
1. A roof shield structure for a reactor, comprising: the shielding box with set up in the ventilation hood on the shielding box, the shielding box includes:
the annular cavity is internally provided with a plurality of vertical air channels extending vertically and used for a plurality of main container connecting pipes of the reactor to pass through;
the rib plates are arranged in the annular cavity in the radial direction so as to divide the annular cavity into a plurality of mutually independent fan-shaped cavities; and
a plurality of fan-shaped shielding bodies, each fan-shaped shielding body is arranged in one fan-shaped cavity, a horizontal air duct extending along the horizontal direction is formed in each fan-shaped shielding body,
wherein, shielding box still includes: at least one reinforcement set up in the annular cavity, the roof of annular cavity the fan-shaped shield forms respectively and is used for allowing the hole of stepping down of reinforcement through, the reinforcement respectively with the roof of annular cavity, diapire and the fan-shaped shield is connected.
2. The roof shield structure of claim 1, wherein the stiffener includes:
an outer cylinder extending upwards from the bottom wall of the annular cavity to a yielding hole of the top wall of the annular cavity, wherein the outer cylinder is connected with the top wall, the bottom wall and the fan-shaped shielding body of the annular cavity; and
and the shielding piece is arranged in the outer cylinder body.
3. The roof shield structure of claim 2, wherein the shield comprises:
the inner cylinder body is arranged in the outer cylinder body, the height of the inner cylinder body is smaller than that of the outer cylinder body, the top end of the inner cylinder body is flush with the top end of the outer cylinder body, and a space exists between the bottom end of the inner cylinder body and the bottom end of the outer cylinder body;
the upper end plate and the lower end plate are respectively arranged at the top and the bottom of the inner cylinder body and form an accommodating space together with the inner cylinder body; and
and the shielding body is arranged in the accommodating space.
4. The roof shield structure of claim 3, wherein the shield includes: steel plate layers and concrete layers are alternately arranged.
5. The roof shield structure of claim 4, wherein the at least one stiffener includes a plurality of first stiffeners and at least one second stiffener;
the diameter of the first reinforcement is smaller than the diameter of the second reinforcement, wherein the shield of the second reinforcement further comprises a stiffener connecting the upper end plate and the lower end plate.
6. The roof shield structure of claim 5, wherein the plurality of vertical air channels comprises: the sodium filling and discharging connecting pipe air duct,
the number of the second reinforcing pieces is two, and the two second reinforcing pieces are symmetrically arranged relative to a vertical plane passing through the axis of the annular cavity and the axis of the sodium charging and discharging connecting pipe air duct.
7. The roof shield structure of claim 6 wherein a line connecting axes of two of said second stiffeners divides said annular cavity into a large sector area and a small sector area, said plurality of first stiffeners being all located in said large sector area.
8. The roof shielding structure of claim 6, wherein the plurality of fan-shaped cavities includes a first fan-shaped cavity, the sodium charge and discharge nozzle air duct being disposed within the first fan-shaped cavity;
and vent holes are respectively formed in the rib plates on two sides of the first fan-shaped cavity, so that cooling air in the horizontal air channels of the adjacent fan-shaped cavities can enter the horizontal air channels of the first fan-shaped cavities.
9. The roof shield structure of claim 1, wherein an annular seal assembly is provided between the vertical duct and the main container nozzle for preventing the outflow of cooling air from above the vertical duct.
10. The roof shield structure of claim 9, wherein the annular seal assembly comprises:
an annular lower cover;
the annular upper cover is connected with the annular lower cover to form an annular cavity;
the sliding ring is arranged in the annular cavity in a sliding way along the radial direction, wherein the inner diameter of the sliding ring is smaller than the inner diameter of the annular cavity, and the outer diameter of the sliding ring is smaller than the outer diameter of the annular cavity; and
the sealing ring is arranged on the radial inner side of the sliding ring and is used for being sleeved on the main container connecting pipe so as to be in sealing connection with the main container connecting pipe.
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