CN115050498B - Reciprocating type choke of high-temperature gas cooled reactor fuel loading and unloading system - Google Patents
Reciprocating type choke of high-temperature gas cooled reactor fuel loading and unloading system Download PDFInfo
- Publication number
- CN115050498B CN115050498B CN202210737053.6A CN202210737053A CN115050498B CN 115050498 B CN115050498 B CN 115050498B CN 202210737053 A CN202210737053 A CN 202210737053A CN 115050498 B CN115050498 B CN 115050498B
- Authority
- CN
- China
- Prior art keywords
- inner core
- sliding inner
- opening
- supporting rod
- temperature gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003758 nuclear fuel Substances 0.000 title claims abstract description 23
- 238000009434 installation Methods 0.000 claims abstract description 9
- 230000007246 mechanism Effects 0.000 claims description 16
- 238000003754 machining Methods 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 3
- 230000007774 longterm Effects 0.000 abstract 1
- 230000002265 prevention Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 20
- 239000000446 fuel Substances 0.000 description 14
- 239000001307 helium Substances 0.000 description 11
- 229910052734 helium Inorganic materials 0.000 description 11
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 11
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000005484 gravity Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000002915 spent fuel radioactive waste Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- G21C19/20—Arrangements for introducing objects into the pressure vessel; Arrangements for handling objects within the pressure vessel; Arrangements for removing objects from the pressure vessel
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention provides a reciprocating type air damper of a high-temperature gas cooled reactor fuel loading and unloading system, which comprises a shell, a ball inlet pipe, a ball outlet pipe and a sliding inner core, wherein the ball inlet pipe is connected with the shell; the top of the shell is connected with the ball inlet pipe, the bottom of the shell is connected with the ball outlet pipe, and an extension part is formed in the shell; the sliding inner core comprises a first supporting rod and a second supporting rod, the first end of the second supporting rod is fixedly connected with the first end of the first supporting rod, and an installation gap is formed between the second end of the second supporting rod and the first supporting rod; the first support rod is provided with a first opening, the second support rod is provided with a second opening, and the first opening and the second opening are communicated in the vertical direction; the sliding inner core is arranged on the inner side of the shell and can move along the extending direction of the extending part. The invention has the technical effects of simple and reliable structure, long-term operation, effective prevention of the ball blocking phenomenon of the flow choking device and ensured working stability of the flow choking device.
Description
Technical Field
The invention belongs to the technical field of nuclear power, and particularly relates to a reciprocating type choke of a high-temperature gas cooled reactor fuel loading and unloading system.
Background
The high temperature gas cooled reactor is a reactor with helium as a loop cooling medium and with the function of non-stop refueling, and the fuel reactor core is composed of spherical elements (graphite spheres in the initial loading process and gradually replaced by fuel spheres in the subsequent step by step) with the diameter of 60mm. Under normal operation, the spherical element is continuously discharged from the discharge pipe at the bottom of the pressure vessel and enters the fuel loading and unloading system. The fuel loading and unloading system is a huge pressure-bearing pipeline system and a complex electromechanical control system, and can realize the functions of conveying, stopping, shunting, temporarily storing and the like of the spherical element. After the spherical element is discharged from the reactor core, the spherical element firstly descends in a pipeline with the inner diameter of 65mm by means of gravity, then enters the helium conveying subsystem through the flow choking device, and the conveying power is provided by the helium rapidly flowing in the pipeline of the helium conveying subsystem to re-convey the spherical element to the reactor core or to the spent fuel tank.
The main function of the flow blocking device is to execute the single conveying and airflow blocking functions of the spherical element, not only can control and allow the spherical element to pass through, but also can limit and block the airflow exchange at two sides of the flow blocking device, thereby ensuring that the airflow pressure in the pipeline of the helium conveying subsystem is not interfered by the pressure of a primary loop of the reactor, so that the helium conveying subsystem can stably operate.
Referring to fig. 1, a schematic view of a current choke includes a housing 100 and a rotor 200, wherein the rotor 200 is disposed inside the housing 100. The upper and lower both ends of shell link to each other with ball inlet pipe and ball outlet pipe respectively, and the upper and lower both sides of rotor are equipped with first counter bore and second counter bore respectively, and the degree of depth of first counter bore and second counter bore is 60mm. When the rotor rotates to the position of fig. 1, the lowest one of the upper bulb drops by gravity will fall into the first counterbore and after the rotor rotates 180 °, the spherical element in the first counterbore will enter the helium delivery subsystem through the bulb at the lower end of the housing while the second counterbore has rotated to the bulb and receives the next spherical element. By so cycling, the flow blocker can perform the function of passing the spherical element but blocking the helium flow.
However, the current choke is easy to get stuck in actual operation. For example, when debris generated by the upper circuit of the flow resistor falls into the first counter bore or the second counter bore of the rotor of the flow resistor, the position of the spherical element is raised, thereby causing a ball clamping phenomenon,
the rotor can not rotate, and the fuel loading and unloading system can not continue to operate, so that the smooth operation of the high-temperature gas cooled reactor is seriously influenced.
Disclosure of Invention
The invention aims at solving at least one of the technical problems existing in the prior art and provides a novel technical scheme of a reciprocating type choke of a high-temperature gas cooled reactor fuel loading and unloading system.
According to one aspect of the present invention there is provided a high temperature gas cooled reactor fuel handling system reciprocating choke comprising:
the ball inlet pipe is connected to the top of the shell, the ball outlet pipe is connected to the bottom of the shell, and an extension part is formed in the shell;
the sliding inner core comprises a first supporting rod and a second supporting rod, the first end of the second supporting rod is fixedly connected with the first end of the first supporting rod, and an installation gap is formed between the second end of the second supporting rod and the first supporting rod; the first support rod is provided with a first opening, the second support rod is provided with a second opening, and the first opening and the second opening are communicated in the vertical direction; the sliding inner core is arranged on the inner side of the shell and can move along the extending direction of the extending part;
when the sliding inner core is positioned at the first position, the extension part is completely embedded in the installation gap, and the second opening is opposite to the ball outlet pipe; the first opening is opposite to the ball inlet pipe, the distance between the lower end face of the first opening and the lower end face of the ball inlet pipe is larger than the diameter of the spherical element, the spherical element in the ball inlet pipe can fall into the first opening, and the ball inlet pipe and the ball outlet pipe are separated by the extension part;
when the sliding inner core moves from a first position to a second position along a first direction, the first opening is communicated with the second opening, a spherical element can fall into the second opening, the first supporting rod and the shell form a first cavity communicated with a ball inlet pipe, the second supporting rod and the shell form a second cavity communicated with a ball outlet pipe, and the first cavity is not communicated with the second cavity;
the ball element in the second bore may drop into the ball outlet tube when the sliding inner core moves in the second direction from the second position to the first position.
Optionally, a top surface of one end of the extension part, which is close to the sliding inner core, is recessed downwards to form a step surface;
when the sliding inner core moves from a first position to a third position along a first direction, the spherical element positioned in the first opening falls on the step surface, and the first cavity is not communicated with the second cavity;
the spherical element on the step surface falls into the second aperture when the sliding core moves from the third position to the second position in the first direction.
Optionally, the shell is formed by processing an L-shaped steel block;
a first machining hole and a second machining hole which penetrate through the L-shaped steel block to the other end are formed in one end of the L-shaped steel block at intervals, and the length of the first machining hole is longer than that of the second machining hole; the first processing hole and the second processing hole at the other end of the L-shaped steel block are communicated; forming an extension between the first and second tooling holes;
when the sliding inner core moves along the first direction or the second direction, the first supporting rod is embedded in the first processing hole, and the second supporting rod is embedded in the second processing hole.
Optionally, the first processing hole comprises a first part and a second part, the first part is located on one side, far away from the sliding inner core, of the second part, the first part is a round hole, the diameter of the round hole is 70mm, the upper side surface of the second part is a plane, and the distance between the plane position and the bottommost end of the first part of the first processing hole is 50mm;
when the sliding inner core moves along the first direction or the second direction, the upper surface of the first supporting rod is attached to the upper side surface of the second part; the upper surface of the second supporting rod is at least partially attached to the lower surface of the extension portion.
Optionally, the ball outlet pipe and the ball inlet pipe are welded with the shell respectively.
Optionally, the reciprocating type air dam of the high temperature gas cooled reactor fuel loading and unloading system further comprises a driving assembly;
the driving assembly is connected with the sliding inner core and drives the sliding inner core to move along a first direction or a second direction.
Optionally, the driving structure comprises a driving motor, a link mechanism and a box body, the box body is connected with the shell, and the link mechanism is positioned in the box body;
one end of the connecting rod mechanism is connected with the driving motor, and the other end of the connecting rod mechanism is connected with the sliding inner core.
Optionally, the linkage mechanism comprises a rotating rod and a connecting rod;
one end of the rotating rod is connected with an output shaft of the driving motor, the other end of the rotating rod is movably connected with the connecting rod, and one end, far away from the rotating rod, of the connecting rod is hinged with the sliding inner core.
Optionally, the rotary shaft is further included, one end, close to the connecting rod, of the rotary rod is rotatably connected with the first end of the rotary shaft, and the second end of the rotary shaft penetrates through the oblong hole.
Optionally, the box body is connected with the shell through a flange, and the box body is in sealing fit with the shell.
The invention has the technical effects that:
in this application embodiment, along with sliding inner core along first direction and second direction reciprocating motion, can realize that single spherical element loops through the stopper, simultaneously, no matter sliding inner core removes to optional position, first cavity all the time with do not communicate between the second cavity to avoid the air current exchange of stopper both sides effectively, guaranteed the steady operation of helium transportation subsystem.
In addition, when the upper side pipeline of the flow resistor produces scraps and falls into the first opening, the spherical element can still fall into the second opening from the first opening along with the movement of the sliding inner core, and then can fall into the ball outlet pipe, and the ball blocking phenomenon can not occur, so that the single spherical element can sequentially pass through the flow resistor, and the normal operation of the flow resistor is ensured. On the other hand, in the process of reciprocating movement of the sliding inner core, fragments can be pushed by the sliding inner core and move downwards and finally enter a pipeline below the flow resistor to accumulate in the flow resistor, so that safe and stable operation of the flow resistor is ensured.
Drawings
FIG. 1 is a schematic view of a conventional choke;
FIG. 2 is a schematic diagram of a reciprocating choke of a fuel handling system of a high temperature gas cooled reactor according to an embodiment of the present invention;
FIG. 3 is a schematic view of a housing of a reciprocating choke of a fuel handling system for a high temperature gas cooled reactor according to an embodiment of the present invention;
FIG. 4 is a schematic view of a sliding inner core of a reciprocating choke of a fuel handling system of a high temperature gas cooled reactor according to an embodiment of the present invention;
FIG. 5 is a schematic view of a sliding inner core of a reciprocating choke of a fuel handling system for a high temperature gas cooled reactor in a first position according to an embodiment of the present invention;
FIG. 6 is a schematic view of a sliding inner core of a reciprocating choke of a fuel handling system for a high temperature gas cooled reactor in a third position according to an embodiment of the present invention;
FIG. 7 is a schematic view of a sliding inner core of a reciprocating choke of a high temperature gas cooled reactor fuel handling system in a second position according to an embodiment of the present invention;
FIG. 8 is a schematic view of a sliding inner core of a reciprocating choke of a high temperature gas cooled reactor fuel handling system according to an embodiment of the present invention moving from a second position to a first position;
FIG. 9 is a schematic view of a sliding inner core of a reciprocating choke of a high temperature gas cooled reactor fuel handling system according to an embodiment of the present invention moving from a second position to a first position.
In the figure: 100. a housing; 200. a rotor; 1. a housing; 11. a first processed hole; 12. a second processed hole; 2. an extension; 21. a step surface; 3. a case; 4. a ball inlet pipe; 5. a ball outlet pipe; 6. a sliding inner core; 61. a first strut; 611. a first opening; 62. a second strut; 621. a second opening; 63. a mounting gap; 7. a flange blocking plate; 8. a link mechanism; 81. a rotating lever; 82. a connecting rod; 821. a slotted hole; 9. spherical elements.
Detailed Description
Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise.
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functionality throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
The features of the terms "first", "second", and the like in the description and in the claims of this application may be used for descriptive or implicit inclusion of one or more such features. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
As shown in fig. 2 to 9, the embodiment of the present application provides a reciprocating type choke of a fuel loading and unloading system of a high temperature gas cooled reactor, which is used for realizing the sequential passing of single spherical elements 9 and can effectively exchange the air flow at two sides of the choke.
Referring specifically to fig. 2 to 4, the high temperature gas cooled reactor fuel handling system reciprocating choke comprises a housing 1, a bulb 4, a bulb 5 and a sliding inner core 6. The top of the shell 1 is connected with the ball inlet pipe 4, the bottom is connected with the ball outlet pipe 5, and an extension part 2 is formed inside the shell 1. Wherein, the single spherical element 9 sequentially passes through the ball inlet pipe 4, the shell 1, the sliding inner core 6 and the ball outlet pipe 5 and finally enters the pipeline below the flow resistor.
Further specifically, as shown in fig. 4, the sliding core 6 includes a first support rod 61 and a second support rod 62, a first end of the second support rod 62 is fixedly connected to a first end of the first support rod 61, and an installation gap 63 is formed between a second end of the second support rod 62 and the first support rod 61; the first supporting rod 61 is provided with a first opening 611, the second supporting rod 62 is provided with a second opening 621, and the first opening 611 and the second opening 621 are communicated in the vertical direction; the sliding core 6 is provided inside the housing 1 and is movable in the extending direction of the extending portion 2.
For example, the shape of the mounting gap 63 is adapted to the shape of the extension 2, so that the extension 2 can be removed from the mounting gap 63 or inserted into said mounting gap 63 when the sliding core 6 is moved in the first direction or the second direction.
Referring to fig. 5, when the sliding inner core 6 is in the first position, the extension 2 is completely embedded in the installation gap 63, and the second opening 621 is opposite to the ball outlet pipe 5; referring to fig. 9, the first opening 611 is opposite to the ball inlet pipe 4, a distance from the lower end surface of the first opening 611 to the lower end surface of the ball inlet pipe 4 is greater than the diameter of the spherical element 9, the spherical element 9 in the ball inlet pipe 4 may fall into the first opening 611, the ball inlet pipe 4 and the ball outlet pipe 5 are separated by the extension part 2, and the extension part 2 can better avoid the communication between the ball inlet pipe 4 and the ball outlet pipe 5, thereby effectively avoiding the air flow exchange at both sides of the air flow blocker.
It should be noted that, since the first opening 611 and the second opening 621 extend vertically, when the sliding inner core 6 is located at the first position, the spherical element 9 in the ball inlet pipe 4 may fall into the first opening 611, and at the same time, the spherical element 9 in the second opening 621 may also fall into the ball outlet pipe 5.
Because the distance between the lower end surface of the first hole 611 and the lower end surface of the ball inlet pipe 4 is larger than the diameter of the spherical element 9, even if the debris generated by the upper pipe of the flow resistor falls into the first hole 611, the position of the spherical element 9 falling into the first hole 611 is raised, the spherical element 9 can also move along the first direction under the drive of the sliding inner core 6, the ball blocking phenomenon can not occur, and the working stability of the flow resistor is ensured.
Referring to fig. 7, when the sliding core 6 moves from the first position to the second position along the first direction, the first opening 611 penetrates the second opening 621, the spherical element 9 may fall into the second opening 621, the first strut 61 forms a first chamber communicating with the ball inlet pipe 4 with the housing 1, the second strut 62 forms a second chamber communicating with the ball outlet pipe 5 with the housing 1, and the first chamber does not communicate with the second chamber.
For example, when the sliding core 6 is moved from the first position to the second position in the first direction, the part of the extension 2 is pulled out from the installation gap 63 so that the first aperture 611 and the second aperture 621 penetrate, thereby allowing the spherical element 9 to fall into the second aperture 621, ensuring smoothness of movement of the spherical element 9. In the process that the sliding inner core 6 moves from the first position to the second position along the first direction, the first cavity and the second cavity are not communicated all the time, so that air flow exchange on two sides of the flow choking device is effectively avoided.
Referring to fig. 9, when the sliding inner core 6 is moved from the second position to the first position in the second direction, the spherical element 9 located in the second opening 621 may fall into the ball-out tube 5.
It should be noted that, when the sliding inner core 6 moves from the second position to the first position along the second direction, on one hand, the spherical elements 9 located in the second openings 621 may fall into the ball outlet pipe 5, so as to realize that the individual spherical elements 9 sequentially pass through the flow resistors; on the other hand, the spherical element 9 in the bulb 4 enters the first opening 611, and finally enters the lower line of the choke from the bulb 5 as the sliding core 6 moves. In this way, the plurality of spherical elements 9 can pass through the flow chokes in turn, and the air flows at the two sides of the flow chokes can be ensured not to be exchanged.
In this application embodiment, along with the sliding inner core 6 along the reciprocating motion of the first direction and the second direction, can realize that single spherical element 9 loops through the stopper, simultaneously, no matter the sliding inner core 6 moves to optional position, the ball inlet pipe 4 is not communicated with the ball outlet pipe 5 all the time to avoid the air current exchange of stopper both sides effectively, guaranteed the steady operation of helium gas transportation subsystem.
In addition, when the scraps generated by the upper pipe of the flow resistor fall into the first opening 611, the spherical element 9 can still fall into the second opening 621 from the first opening 611 along with the movement of the sliding inner core 6, and then can fall into the ball outlet pipe 5, so that the phenomenon of ball blocking can not occur, and the single spherical element 9 can sequentially pass through the flow resistor, and the normal operation of the flow resistor can be ensured. On the other hand, in the process of reciprocating the sliding inner core 6, the scraps can be pushed by the sliding inner core 6 and move downwards, finally enter a pipeline below the flow resistor and accumulate in the flow resistor, so that the safe and stable operation of the flow resistor is ensured.
Alternatively, referring to fig. 2 and 3, the top surface of the extension 2 near one end of the sliding core 6 is recessed downward to form a stepped surface 21;
when the sliding core 6 moves from the first position to the third position in the first direction, the spherical element 9 located in the first opening 611 falls on the step surface 21, and the first chamber is not communicated with the second chamber;
when the sliding core 6 is moved in the first direction from the third position to the second position, the spherical element 9 on the step surface 21 falls into the second aperture 621.
In the above embodiment, on the one hand, the step surface 21 plays a supporting role on the spherical element 9, so that the spherical element 9 moves rightwards under the pushing action of the first opening 611, and on the other hand, the spherical element 9 is in the position relationship between the first processing hole and the second processing hole of the shell and the first support rod and the second support rod of the sliding inner core in the falling process, so that the first cavity and the second cavity can be better ensured not to be communicated, and the air flow exchange on two sides of the air flow blocker can be effectively avoided.
Alternatively, referring to fig. 3, the housing 1 is machined from L-shaped steel blocks;
a first machining hole 11 and a second machining hole 12 penetrating to the other end are formed in one end of the L-shaped steel block at intervals, and the length of the first machining hole 11 is longer than that of the second machining hole 12; the first processing hole 11 and the second processing hole 12 at the other end of the L-shaped steel block are communicated; forming an extension 2 between the first and second tooling holes 11 and 12;
when the sliding inner core 6 moves along the first direction or the second direction, the first supporting rod 61 is embedded in the first processing hole 11, and the second supporting rod 62 is embedded in the second processing hole 12.
In the above embodiment, the machining mode of the housing 1 is relatively simple, which is helpful for realizing that the ball inlet pipe 4 and the ball outlet pipe 5 are not communicated all the time when the sliding inner core 6 moves in the housing 1 along the first direction and the second direction, and is also helpful for ensuring that the spherical element 9 can sequentially pass through the ball inlet pipe 4, the housing 1, the sliding inner core 6 and the ball outlet pipe 5 and finally enter the pipeline below the flow resistor.
For example, the end of the first machined hole 11 remote from the sliding inner core 6 may be detachably connected to the flange closure plate 7 to better close the first machined hole 11; meanwhile, the connecting flange blocking plate 7 can be detached from one end, far away from the sliding inner core 6, of the second processing hole 12 so as to better close the second processing hole 12, which is beneficial to ensuring that the shell 1 has better tightness and effectively preventing the penetration between the ball inlet pipe 4 and the ball outlet pipe 5 through a flow blocker.
For another example, the inner diameter of the ball inlet pipe 4 and the ball outlet pipe 5 is 65mm for better passing through the spherical element 9, and the ball inlet pipe 4 and the ball outlet pipe 5 are steel pipes.
Optionally, the first machined hole 11 includes a first portion and a second portion, the first portion is located on a side of the second portion, which is far away from the sliding inner core 6, the first portion is a circular hole, a diameter of the circular hole is 70mm, and an upper side surface of the second portion is a plane. In this case, since the diameter of the round hole is 70mm and the diameter of the spherical element 9 is 65mm, even if the spherical element 9 falling into the first hole 611 is lifted, the spherical element 9 does not come out as the sliding core 6 moves, but moves as the sliding core 6 moves, and finally enters the ball outlet pipe 5 through the second hole 621.
When the sliding inner core 6 moves along the first direction or the second direction, the upper surface of the first supporting rod 61 is attached to the upper surface of the second part; the upper surface of the second strut 62 is at least partially in contact with the lower surface of the extension 2.
In the above embodiment, the sliding inner core 6 moves more smoothly in the casing 1, which is helpful for the single spherical element 9 to enter the ball outlet pipe 5 from the ball inlet pipe 4 along with the movement of the sliding inner core 6, and is also helpful for ensuring the tightness of the opposite sides of the flow blocking device, and effectively avoiding the air flow exchange of the opposite sides of the flow blocking device.
In a specific embodiment, the second machined hole 12 is a shaped hole, the lower portion of the cross section of the second machined hole 12 is a semicircle with a radius of 35mm, and the upper portion is a rectangle with a radius of 70mm by 35 mm. At the right side position of the housing 1, the first and second processed holes 11 and 12 are bored up and down to form a large hole approximately like a oblong hole so that the sliding core 6 moves inside the first and second processed holes 11 and 12.
Optionally, the ball outlet pipe 5 and the ball inlet pipe 4 are welded with the housing 1 respectively. The ball inlet pipe 4 and the ball outlet pipe 5 are connected with the shell 1 in a simpler mode, the fixation is good, and the assembly is convenient.
Optionally, the reciprocating type air dam of the high temperature gas cooled reactor fuel loading and unloading system further comprises a driving assembly;
the driving assembly is connected with the sliding inner core 6 and drives the sliding inner core 6 to move along a first direction or a second direction.
In the above embodiment, the driving assembly can well drive the sliding inner core 6 to reciprocate in the shell 1, so that a plurality of spherical elements 9 can sequentially pass through the flow resistor and enter the pipeline below the flow resistor.
Optionally, the driving structure comprises a driving motor, a link mechanism 8 and a box 3, the box 3 is connected with the shell 1, and the link mechanism 8 is positioned inside the box 3;
one end of the connecting rod mechanism 8 is connected with an output shaft of the driving motor, and the other end of the connecting rod mechanism is connected with the sliding inner core 6.
In the above embodiment, the case 3 can better protect the link mechanism 8, and the driving motor is located outside the case 3, and can better drive the sliding core 6 to reciprocate through the link mechanism 8.
For example, the dynamic and static components are sealed between the output shaft of the driving motor and the box 3, so that the tightness of the choke can be better ensured, and a certain gap is allowed to exist between the sliding inner core 6 and the shell 1, thereby reducing the manufacturing difficulty.
Alternatively, the link mechanism 8 includes a rotating lever 81 and a connecting lever 82;
one end of the rotating rod 81 is connected with an output shaft of a driving motor, the other end of the rotating rod is movably connected with the connecting rod 82, and one end, far away from the rotating rod 81, of the connecting rod 82 is hinged with the sliding inner core 6.
In the above embodiment, the rotating rod 81 rotates under the action of the driving motor, and drives the connecting rod 82 to drive the sliding inner core 6 to reciprocate, so that the connection relationship is relatively simple, and the assembly is convenient. At the same time, the movement of the sliding core 6 can be precisely controlled, which helps to ensure that the individual spherical elements 9 pass smoothly through the flow resistor.
Optionally, referring to fig. 2, the rotary shaft further includes a rotary shaft, one end of the rotary rod 81 near the connecting rod 82 is rotatably connected to a first end of the rotary shaft, and a second end of the rotary shaft is disposed through the oblong hole 821.
In the above embodiment, the oblong hole 821 is provided on the connecting rod 82, so that when the rotating rod 81 rotates at a constant speed, the connecting rod 82 can drive the sliding inner core 6 to stay at the first position and the second position for a short time, so that more time is reserved for the falling of the spherical element 9, the spherical element 9 can be ensured to smoothly pass through the flow blocker, and the ball blocking phenomenon is effectively prevented.
In a specific embodiment, the sliding inner core 6 has a movement distance between the first position and the second position of not less than 130mm, so as to ensure that the spherical element 9 can pass smoothly through the flow resistor. Meanwhile, the height of one end of the rotating rod 81 fixed to the output shaft of the driving motor is the same as the height of the connecting point of the connecting rod 82 and the sliding inner core 6.
Optionally, the box 3 is connected with the shell 1 through a flange, and the box 3 is in sealing fit with the shell 1.
In the above embodiment, the box 3 is connected with the casing 1 through a flange, so that the installation and the disassembly are convenient, and the box 3 is sealed with the casing 1 by adopting a sealing ring, so that the sealing effect is good.
In the embodiment of the application, after the air dam is installed, the ball inlet pipe 4 and the ball outlet pipe 5 are respectively connected with a ball path pipeline of the fuel loading and unloading system, and the ball element 9 enters from the ball inlet pipe 4 and is discharged from the ball outlet pipe 5. Under the instruction of the main control system DCS and the motor controller, the rotation of the link mechanism 8 drives the sliding inner core 6 to reciprocate along the first direction and the second direction, so that the single passage and the airflow isolation function of the spherical element 9 in the air flow blocker are realized.
For example, referring to fig. 5, when the sliding inner core 6 is located at the first position, the first opening 611 of the sliding inner core 6 is concentric with the ball inlet pipe 4, and the first spherical element 9 located at the lowermost end of the ball inlet pipe 4 enters into the first opening 611, even if the first spherical element 9 is raised by chips (less than 10 mm), the upper surface of the first spherical element 9 is still lower than the upper surface of the first processed hole 11, so that the first spherical element 9 does not catch balls when moving with the sliding inner core 6. The size of the debris in the conduit is typically much less than 10mm, based on fuel handling system operating experience, so that the spherical element 9 can move smoothly with the sliding core 6 in the first direction.
Referring to fig. 6, when the sliding core 6 is moved from the first position to the third position in the first direction, the first spherical element 9 is moved in the first direction, and the second spherical element 9 is supported by the upper surface of the sliding core 6.
Referring to fig. 7, when the sliding core 6 is moved to the second position in the first direction, the first spherical element 9 falls into the second aperture 621 of the sliding core 6.
Referring to fig. 8, when the sliding inner core 6 is moved from the second position to the first position in the second direction, the first spherical element 9 is moved leftward.
Referring to fig. 9, when the sliding inner core 6 moves in the second direction to the first position, the first spherical element 9 moves downward by gravity and falls into the outlet bulb 5.
It should be noted that, the contact surface between the sliding inner core 6 and the housing 1 needs to have high machining precision, so as to ensure that the sliding inner core 6 can move freely. The ball inlet pipe 4 and the ball outlet pipe 5 above and below the shell 1 are respectively welded and connected with the upper pipe and the lower pipe of the fuel loading and unloading system, so that the stability of installing the choke is ensured.
Therefore, the reciprocating type choke of the high-temperature gas cooled reactor fuel loading and unloading system provided by the embodiment of the application can better solve the problem of choke clamping balls in the prior art and ensure the stable operation of the helium conveying subsystem.
It is to be understood that the above embodiments are merely illustrative of the application of the principles of the present invention, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the invention, and are also considered to be within the scope of the invention.
Claims (10)
1. A high temperature gas cooled reactor fuel handling system reciprocating choke, comprising:
the ball inlet pipe is connected to the top of the shell, the ball outlet pipe is connected to the bottom of the shell, and an extension part is formed in the shell;
the sliding inner core comprises a first supporting rod and a second supporting rod, the first end of the second supporting rod is fixedly connected with the first end of the first supporting rod, and an installation gap is formed between the second end of the second supporting rod and the first supporting rod; the first support rod is provided with a first opening, the second support rod is provided with a second opening, and the first opening and the second opening are communicated in the vertical direction; the sliding inner core is arranged on the inner side of the shell and can move along the extending direction of the extending part;
when the sliding inner core is positioned at the first position, the extension part is completely embedded in the installation gap, and the second opening is opposite to the ball outlet pipe; the first opening is opposite to the ball inlet pipe, the distance between the lower end face of the first opening and the lower end face of the ball inlet pipe is larger than the diameter of the spherical element, the spherical element in the ball inlet pipe can fall into the first opening, and the ball inlet pipe and the ball outlet pipe are separated by the extension part;
when the sliding inner core moves from a first position to a second position along a first direction, the first opening is communicated with the second opening, a spherical element can fall into the second opening, the first supporting rod and the shell form a first cavity communicated with a ball inlet pipe, the second supporting rod and the shell form a second cavity communicated with a ball outlet pipe, and the first cavity is not communicated with the second cavity;
the ball element in the second bore may drop into the ball outlet tube when the sliding inner core moves in the second direction from the second position to the first position.
2. The high temperature gas cooled reactor fuel handling system reciprocating choke of claim 1, wherein a top surface of the extension proximate one end of the sliding inner core is recessed downward to form a stepped surface;
when the sliding inner core moves from a first position to a third position along a first direction, the spherical element positioned in the first opening falls on the step surface, and the first cavity is not communicated with the second cavity;
the spherical element on the step surface falls into the second aperture when the sliding core moves from the third position to the second position in the first direction.
3. The high temperature gas cooled reactor fuel handling system reciprocating air dam of claim 2, wherein the housing is machined from L-blocks;
a first machining hole and a second machining hole which penetrate through the L-shaped steel block to the other end are formed in one end of the L-shaped steel block at intervals, and the length of the first machining hole is longer than that of the second machining hole; the first processing hole and the second processing hole at the other end of the L-shaped steel block are communicated; forming an extension between the first and second tooling holes;
when the sliding inner core moves along the first direction or the second direction, the first supporting rod is embedded in the first processing hole, and the second supporting rod is embedded in the second processing hole.
4. The high temperature gas cooled reactor fuel handling system reciprocating air dam of claim 3, wherein the first tooling hole comprises a first portion and a second portion, the first portion is positioned on a side of the second portion away from the sliding inner core, the first portion is a circular hole, the diameter of the circular hole is 70mm, and the upper surface of the second portion is a plane;
when the sliding inner core moves along the first direction or the second direction, the upper surface of the first supporting rod is attached to the upper side surface of the second part; the upper surface of the second supporting rod is at least partially attached to the lower surface of the extension portion.
5. A high temperature gas cooled reactor fuel handling system reciprocating choke as set forth in claim 3, wherein said ball outlet tube and said ball inlet tube are welded to said housing, respectively.
6. The high temperature gas cooled reactor fuel handling system reciprocating choke of claim 3, further comprising a drive assembly;
the driving assembly is connected with the sliding inner core and drives the sliding inner core to move along a first direction or a second direction.
7. The high temperature gas cooled reactor fuel handling system reciprocating air dam of claim 6, wherein the drive assembly comprises a drive motor, a linkage, and a housing, the housing being coupled to the housing and the linkage being located inside the housing;
one end of the connecting rod mechanism is connected with the driving motor, and the other end of the connecting rod mechanism is connected with the sliding inner core.
8. The high temperature gas cooled reactor fuel handling system reciprocating air dam of claim 7, wherein the linkage comprises a rotating rod and a connecting rod;
one end of the rotating rod is connected with an output shaft of the driving motor, the other end of the rotating rod is movably connected with the connecting rod, and one end, far away from the rotating rod, of the connecting rod is hinged with the sliding inner core.
9. The high temperature gas cooled reactor fuel handling system reciprocating air dam of claim 8, further comprising a rotating shaft, wherein an end of the rotating rod adjacent to the connecting rod is rotatably connected to a first end of the rotating shaft, and a second end of the rotating shaft is disposed through the oblong hole.
10. The high temperature gas cooled reactor fuel handling system reciprocating choke of claim 8, wherein the tank is flanged to the housing and the tank is in sealing engagement with the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210737053.6A CN115050498B (en) | 2022-06-27 | 2022-06-27 | Reciprocating type choke of high-temperature gas cooled reactor fuel loading and unloading system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210737053.6A CN115050498B (en) | 2022-06-27 | 2022-06-27 | Reciprocating type choke of high-temperature gas cooled reactor fuel loading and unloading system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115050498A CN115050498A (en) | 2022-09-13 |
| CN115050498B true CN115050498B (en) | 2024-01-30 |
Family
ID=83164298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210737053.6A Active CN115050498B (en) | 2022-06-27 | 2022-06-27 | Reciprocating type choke of high-temperature gas cooled reactor fuel loading and unloading system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115050498B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1713307A (en) * | 2005-07-29 | 2005-12-28 | 清华大学 | Fuel element distributor of ball bed high-temperature air cooled reactor |
| CN102097144A (en) * | 2010-11-02 | 2011-06-15 | 清华大学 | Singularized spherical-element conveying device applied to high-temperature gas cooled reactor |
| CN103745757A (en) * | 2014-01-24 | 2014-04-23 | 清华大学 | Steering gear applied to high temperature gas cooled reactor |
| CN103778982A (en) * | 2014-01-24 | 2014-05-07 | 清华大学 | Flow plug applied to high-temperature gas cooled reactor |
| CN108726161A (en) * | 2018-08-22 | 2018-11-02 | 清华大学 | A kind of class valve for globular material |
| CN109830319A (en) * | 2018-12-03 | 2019-05-31 | 清华大学 | Flow plug for high temperature gas cooled reactor |
| CN110600146A (en) * | 2019-09-25 | 2019-12-20 | 中核能源科技有限公司 | Ball passing controller applied to high-temperature gas cooled reactor |
| CN211350120U (en) * | 2019-12-13 | 2020-08-25 | 鞍山电磁阀有限责任公司 | Electromagnetic dredging device for nuclear power station and fuel loading and unloading system of nuclear power station |
| CN214152463U (en) * | 2020-12-14 | 2021-09-07 | 华能山东石岛湾核电有限公司 | Be applied to slider formula distributor of ball bed formula high temperature gas cooled reactor |
| CN113488209A (en) * | 2021-06-01 | 2021-10-08 | 华能山东石岛湾核电有限公司 | Sliding block type ball conveying device and method for pebble bed type high-temperature gas cooled reactor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109607240B (en) * | 2018-12-29 | 2020-02-11 | 清华大学 | Discharging device |
-
2022
- 2022-06-27 CN CN202210737053.6A patent/CN115050498B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1713307A (en) * | 2005-07-29 | 2005-12-28 | 清华大学 | Fuel element distributor of ball bed high-temperature air cooled reactor |
| CN102097144A (en) * | 2010-11-02 | 2011-06-15 | 清华大学 | Singularized spherical-element conveying device applied to high-temperature gas cooled reactor |
| CN103745757A (en) * | 2014-01-24 | 2014-04-23 | 清华大学 | Steering gear applied to high temperature gas cooled reactor |
| CN103778982A (en) * | 2014-01-24 | 2014-05-07 | 清华大学 | Flow plug applied to high-temperature gas cooled reactor |
| CN108726161A (en) * | 2018-08-22 | 2018-11-02 | 清华大学 | A kind of class valve for globular material |
| CN109830319A (en) * | 2018-12-03 | 2019-05-31 | 清华大学 | Flow plug for high temperature gas cooled reactor |
| CN110600146A (en) * | 2019-09-25 | 2019-12-20 | 中核能源科技有限公司 | Ball passing controller applied to high-temperature gas cooled reactor |
| CN211350120U (en) * | 2019-12-13 | 2020-08-25 | 鞍山电磁阀有限责任公司 | Electromagnetic dredging device for nuclear power station and fuel loading and unloading system of nuclear power station |
| CN214152463U (en) * | 2020-12-14 | 2021-09-07 | 华能山东石岛湾核电有限公司 | Be applied to slider formula distributor of ball bed formula high temperature gas cooled reactor |
| CN113488209A (en) * | 2021-06-01 | 2021-10-08 | 华能山东石岛湾核电有限公司 | Sliding block type ball conveying device and method for pebble bed type high-temperature gas cooled reactor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115050498A (en) | 2022-09-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102342415B1 (en) | Withdrawal fuel temporary storage | |
| KR100935089B1 (en) | Passive safety-grade decay heat removal system from a sodium freezing issue at the intermediate heat removal sodium loop | |
| JP2012509459A (en) | Integrated SFR reactor with improved compactness and convection | |
| CN110534211B (en) | High-temperature gas cooled reactor absorption ball shutdown device | |
| WO2020134074A1 (en) | Unloading device | |
| CN110534219B (en) | Particle aspiration device and method | |
| CN115050498B (en) | Reciprocating type choke of high-temperature gas cooled reactor fuel loading and unloading system | |
| KR20120056841A (en) | Electronic expansion valve | |
| JPS6275375A (en) | Nuclear reactor and usage thereof | |
| CN217606563U (en) | Ball passing flow blocking device with ball clamping fault online removing function and gas cooled reactor | |
| CN218030762U (en) | Automatic oiling device of bearing and oil smoke discharging box type fan | |
| CN115083641B (en) | Flow-blocking positioning and distributing device applied to pebble-bed type high-temperature reactor | |
| KR102005676B1 (en) | Nozzle cutting device in reactor vessel | |
| JP2024026032A (en) | Flow choking device of high-temperature gas reactor | |
| CN214671848U (en) | Spiral reverse rotation vertical lifting device for spherical fuel | |
| CN115359936A (en) | Ball bed type high-temperature stacking and taking device and ball bed type high-temperature stacking and taking method | |
| CN108176841A (en) | A kind of casting device | |
| CN113241205A (en) | Spiral reverse rotation vertical lifting device for spherical fuel | |
| US20130315363A1 (en) | Device and method for replacing an irradiated fuel assembly with a new fuel assembly in the vessel of a nuclear reactor, and nuclear reactor including such a device | |
| JPS6176986A (en) | Facility containing atomic nuclear reactor | |
| CN111957943A (en) | Steel pouring protection device | |
| JPH08557Y2 (en) | Pump shaft seal cooling structure | |
| CN112091392A (en) | Heat-insulation antimagnetic pipeline plasma tapping machine | |
| RU2811086C1 (en) | Suction device for high temperature gas cooled reactor | |
| CN110735789B (en) | Spiral tube pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |