CN214279620U - Visual experiment body for ocean condition rod bundle channel - Google Patents
Visual experiment body for ocean condition rod bundle channel Download PDFInfo
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- CN214279620U CN214279620U CN202120227544.7U CN202120227544U CN214279620U CN 214279620 U CN214279620 U CN 214279620U CN 202120227544 U CN202120227544 U CN 202120227544U CN 214279620 U CN214279620 U CN 214279620U
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Abstract
The utility model discloses a visual experiment body for ocean condition rod bundle channels, which comprises an electric heating component and a flow channel component; the electric heating component comprises a stainless steel bar bundle which comprises N2The stainless steel elements are combined in an NxN arrangement mode, the flow channel assembly comprises flow channel plates, the flow channel plates are enclosed to form a square channel, the flow channel plates are sealed by high-temperature silicon rubber rings, and the stainless steel bar bundles are positioned in the square channel; be provided with the visual window on the runner board, the visual window is used for observing the condition electric heating assemblies and the runner subassembly of stainless steel cluster of rods and is provided with ceramic insulating assemblies between. The utility model has the characteristics of simple structure, technology maturity, stable performance and cost are lower etc, possess good electrical heating, insulating andthe sealing performance completely meets the requirement of carrying out a thermal hydraulic visualization experiment of the rod bundle fuel assembly under the ocean condition under the working conditions of high-temperature heating and medium pressure.
Description
Technical Field
The utility model relates to a pressure vessel equipment field, concretely relates to visual experiment body of ocean condition rod cluster passageway.
Background
The research on the thermal hydraulic characteristics of the reactor core fuel assembly has very important significance for the safe operation of a reactor and the design of a related system, and thermal hydraulic analysis and experimental research are carried out in various countries in order to improve the performance of the reactor core fuel assembly and optimize the design of the reactor core fuel assembly. The reactor core structure of offshore operation devices such as a floating nuclear power station, a nuclear power ship and the like can be modeled into a rod bundle channel, and the flow pattern and two-phase flow characteristics inside the reactor core structure play an important role in the design and safe operation of the reactor.
The rod bundle type fuel assembly is a common fuel assembly for nuclear powered ship equipment reactors. Under the action of external force under the ocean condition, the two-phase flow field in the channel is more complex. Compared with a rectangular flow passage, the stress analysis of the bubbles on the rod bundle flow passage is more complex and is more easily influenced by the movement condition, so that the behavior of the bubbles is complex and changeable under the ocean transient movement condition due to the action of the alternating external force field and the flow mixing. The process has important influence on the thermal hydraulic characteristics of the channel, and needs to carry out deep theoretical and experimental research on the flow pattern and the dynamic characteristics of the steam bubbles in the rod bundle channel, thereby providing an experimental basis for the safe operation of the reactor under the ocean condition.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that the visual experiment body of current rod cluster passageway can't adapt to middling pressure, heating and sealed experiment demand under the marine motion condition, and aim at provides a visual experiment body of marine condition rod cluster passageway, solves and to run steadily under marine motion condition and high temperature heating, the middling pressure condition, carries out the visual experiment of rod cluster passageway, repeatedly carries out the problem of thermal engineering hydraulic power research.
The utility model discloses a following technical scheme realizes:
visual experiment body of marine condition rod cluster channel comprises an electric heating assembly anda flow channel assembly; the electric heating component comprises a stainless steel bar bundle, and the stainless steel bar bundle comprises N2Root stainless steel element, said N2The stainless steel elements are combined in an N multiplied by N arrangement mode, wherein N is a natural number more than 1; the flow channel assembly comprises flow channel plates, the flow channel plates surround to form a square channel, the flow channel plates are sealed by high-temperature silicon rubber rings, and the stainless steel bar bundle is positioned in the square channel; the runner plate is provided with a visual window, and the visual window is used for observing the condition of the stainless steel bar bundle; an upper end flange assembly welding piece is arranged at the upper end part of the flow channel assembly, a conductive head is arranged at the other end of the upper end flange assembly welding piece, a first channel for the stainless steel bar bundle to pass through is arranged in the upper end flange assembly welding piece and the conductive head, the upper end of the stainless steel bar bundle passes through the first channel, and a water outlet communicated with the first channel is further arranged on the upper end flange assembly welding piece; a lower end flange assembly welding piece is arranged at the lower end part of the flow channel assembly, a lower flange is arranged at the other end of the lower end flange assembly welding piece, a second channel is arranged in the lower end flange assembly welding piece and the lower flange, the lower end of the stainless steel bar bundle penetrates through the lower end flange assembly welding piece and extends into the lower flange, and a water inlet communicated with the second channel is further formed in the lower end flange assembly welding piece; the lower end of the stainless steel bar bundle is connected with a conductive block through a soft copper braid, and one end of the conductive block, which is connected with the soft copper braid, is clamped into the second channel; an insulating component is arranged between the electric heating component and the flow passage component.
Among the prior art, the design of the visual experiment body of rod cluster passageway under to the medium pressure heating condition under the ocean motion condition has not yet been, the utility model discloses a stainless steel component carries out the experiment under the ocean condition as the rod cluster, and stainless steel component both can heat, can bear the ocean experimental condition of medium pressure and high temperature again. The visual window directly arranged on the runner plate can also bear the ocean motion conditions. Comprehensively, the utility model discloses make the visual experiment body of rod cluster passageway can bear high temperature (250 ℃) heating, middling pressure (3MPa), ocean motion condition, can realize the observation to passageway flow pattern and double-phase motion state, and can develop the visual experiment of thermal technology's water conservancy many times repeatedly.
Furthermore, an insulating sealing gasket is arranged between the lower end flange assembly welding piece and the lower flange, and the lower end flange assembly welding piece, the insulating sealing gasket and the lower flange are sealed in a tongue-and-groove mode. The sealing performance under the ocean motion condition is guaranteed.
Further, the insulating sealing gasket is an asbestos rubber plate.
Furthermore, the electric heating assembly, the flow passage assembly and the insulating assembly are detachably assembled together.
Further, the runner plate includes a plurality of stainless steel plates, and the plurality of stainless steel plates are connected by bolts and nuts. The stainless steel plate has good compression resistance and can well adapt to ocean motion conditions.
Furthermore, the visual window includes three, but the visual window is located the side of square passageway along the rod cluster direction, and three visual window is located the same cross-sectional height of rod cluster. Through three visual windows, the other side is as the background, can be good observe hazel bundle state and various condition, can follow the angle of three directions and observe, convenient experiment.
Furthermore, the shape of the visual window is a rectangle along the direction of the hazel bundle, and the visual window is made of quartz glass. The rectangular visible window not only can be well adapted to the hazel bundle, but also can increase the observable area.
Furthermore, the insulating assembly comprises an insulating ceramic piece, the insulating ceramic piece comprises a plurality of ceramic pieces, and the ceramic pieces surround to form a square-edge-shaped channel.
Furthermore, the thickness of the ceramic piece is 3.5-4.5mm, and the ceramic piece is made of a ceramic material with the content of alumina reaching 95%.
Further, the sealing between the conductive block and the lower flange is self-tightening sealing or packing sealing.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
1. the rod bundle fuel assembly thermal and hydraulic visualization experiment device has the characteristics of simple structure, mature process, stable performance, lower cost and the like, has good electrical heating, insulating and sealing performances, and completely meets the requirement of carrying out a thermal and hydraulic visualization experiment of the rod bundle fuel assembly under the ocean condition under the working conditions of high-temperature heating and medium pressure.
2. The device is suitable for the body of the visualization experiment research of the rod bundle channel flow pattern and the vapor bubble dynamic characteristic under the motion condition, solves the problems of electrical heating, insulation and sealing performance, can stably operate under the ocean motion condition, high-temperature heating and medium-pressure condition, and develops the visualization experiment research.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic cross-sectional view of the present invention.
Reference numbers and corresponding part names in the drawings:
1-conductive head, 2-upper end flange assembly welding piece, 3-lower end flange assembly welding piece, 4-visual window, 5-stainless steel bar bundle, 6-lower end flange assembly welding piece, 7-lower flange, 8-soft copper braid, 9-conductive block and 10-ceramic plate.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Example 1
The embodiment 1 is an ocean condition rod bundle channel visualization experiment body, as shown in fig. 1, including an electric heating assembly and a flow channel assembly; the electric heating component comprises a stainless steel bar bundle, and the stainless steel bar bundle comprises N2Root stainless steel element, N2The stainless steel elements are combined in an N multiplied by N arrangement mode, wherein N is a natural number more than 1; the runner assembly comprises runner plates 3, the runner plates 3 are enclosed to form a square channel, and high-temperature silicon rubber rings are arranged between the runner plates 3Sealing, wherein the stainless steel bar bundle is positioned in the square channel; the flow channel plate 3 is provided with a visible window 4, and the visible window 4 is used for observing the condition of the stainless steel bar bundle; an upper end flange assembly welding piece 2 is arranged at the upper end part of the flow channel assembly, a conductive head 1 is arranged at the other end of the upper end flange assembly welding piece 2, a first channel for stainless steel bar bundles to pass through is arranged in the upper end flange assembly welding piece 2 and the conductive head 1, the upper end of the stainless steel bar bundles passes through the first channel, and a water outlet communicated with the first channel is also arranged on the upper end flange assembly welding piece 2; a lower end flange assembly weldment 6 is arranged at the lower end part of the flow channel assembly, a lower flange 7 is arranged at the other end of the lower end flange assembly weldment 6, a second channel is arranged in the lower end flange assembly weldment 6 and the lower flange 7, the lower end of the stainless steel bar bundle penetrates through the lower end flange assembly weldment 6 and extends into the lower flange 7, and a water inlet communicated with the second channel is further formed in the lower end flange assembly weldment 6; the lower end of the stainless steel bar bundle is connected with a conductive block 9 through a soft copper braid 8, and one end of the conductive block 9, which is connected with the soft copper braid 8, is clamped into the second channel; an insulating component is arranged between the electric heating component and the flow passage component.
In the present embodiment, the stainless steel elements are used as the bundles to perform the marine experiment, and the stainless steel elements can be heated and can bear the marine experiment conditions of medium pressure and high temperature. The visual window directly arranged on the runner plate can also bear the ocean motion conditions. Comprehensively, the utility model discloses make the visual experiment body of rod cluster passageway can bear high temperature (250 ℃) heating, middling pressure (3MPa), ocean motion condition, can realize the observation to passageway flow pattern and double-phase motion state, and can develop the visual experiment of thermal technology's water conservancy many times repeatedly.
An insulating sealing gasket is arranged between the lower end flange assembly welding piece 6 and the lower flange 7, and tongue-and-groove type sealing is adopted between the lower end flange assembly welding piece, the insulating sealing gasket and the lower flange 7. The insulating sealing gasket is made of asbestos rubber plates.
The electric heating assembly, the flow passage assembly and the insulating assembly are detachably assembled together. The flow channel plate 3 includes a plurality of stainless plates connected by bolts and nuts. The stainless steel plate has good compression resistance and can well adapt to ocean motion conditions.
The visual windows 4 comprise three visual windows 4, the visual windows 4 are positioned on the side surface of the square channel along the direction of the rod bundle, and the three visual windows 4 are positioned at the same section height of the rod bundle. The shape of the visible window 4 is a rectangle along the direction of the hazel bundle, and the visible window 4 is made of quartz glass. Through three visual windows, the other side is as the background, can be good observe hazel bundle state and various condition, can follow the angle of three directions and observe, convenient experiment. The rectangular visible window not only can be well adapted to the hazel bundle, but also can increase the observable area.
The insulating assembly comprises an insulating ceramic part, the insulating ceramic part comprises a plurality of ceramic plates 10, and the ceramic plates 10 surround to form a square-edge-shaped channel, as shown in fig. 2. The thickness of the ceramic piece is 3.5-4.5mm, and the ceramic piece is made of a ceramic material with the alumina content of 95%. The sealing between the conductive block 9 and the lower flange 7 adopts self-tightening sealing or packing sealing.
Example 2
The purpose of this embodiment 2 is to provide a body that is applicable to the visual experimental study of bundle of rods passageway flow pattern and bubble kinetic behavior under the motion condition, solves electrical heating, insulating and sealing performance problem, can carry out visual experimental study at ocean motion condition and stable operation under high temperature heating, the middling pressure condition.
The visualization experiment body for the ocean condition rod bundle channel comprises an electric heating assembly, a runner assembly with a visualization window and an insulating assembly, and the assemblies can be assembled and disassembled on site. The electric heating component comprises N2The stainless steel tubes are arranged and combined by adopting an N multiplied by N (N is not less than 2), and the electric conduction is realized through the conductive heads and the conductive blocks; the flow passage plates are made of stainless steel plates, and visual windows for observing the dynamic characteristics and the evolution process of bubbles in the rod bundle channels are arranged on the flow passage plates in three directions respectively. The visual window can be made of quartz glass and is fixed on the flow channel assembly through a pressing plate and screws. The runner plate compresses tightly the outer tube that forms this embodiment 2 experiment body, and the runner inter-plate adopts O type circle to seal up, and the material of O type sealing washer can select for use high temperature silicone rubber.
The electric heating component comprises a heating element, a conductive head and a conductive block, wherein the heating element comprises N2The stainless steel element bars are arranged and combined by NxN (N ≧ 2)After the current is conducted through the conducting head, the soft copper braid and the conducting block, the heating of a rod bundle fuel assembly in the offshore nuclear reactor is simulated. The heating element bundle assembly in the bundle channel is made by assembling and welding NxN stainless steel element rods and soft copper strands.
The runner assembly is fixed with the end flange assembly welding piece through a full-thread stud, a nut and a gasket. The runner assembly mainly comprises a runner plate and a visual window arranged on the runner plate. The flow passage plate is composed of stainless steel plates, visual windows are respectively arranged on the flow passage plates in three directions and used for observing the dynamic characteristics and the evolution process of bubbles in the rod bundle channel, and the visual windows can be made of quartz glass and can bear the pressure within 3 MPa. The shape of the visual window can be rectangular, so that the evolution of the flow pattern in the height direction can be better observed. The visual window is fixed on the runner assembly through the pressure plate and the screws.
Because the heating element of the experiment body is electrified, the heating element and the flow channel assembly must be insulated, and insulating measures are mainly to place insulating ceramic parts in the flow channel plate. The ceramic part is a square-edge-shaped channel surrounded by a plurality of ceramic plates and is arranged in a channel surrounded by a stainless steel runner plate, and the structural form of the cross section is shown in figure 2. The thickness of the ceramic piece is 3.5-4.5mm, and the material is ceramic material with 95% alumina content. The flow channel plates are sealed by O-shaped rings, and the O-shaped rings can be made of high-temperature silicon rubber.
The end flange assembly weldment of the experiment body of this embodiment 2 needs insulation treatment so with lower flange and adopts tongue-and-groove type to seal, uses asbestos rubber board to make insulating sealing pad. The outlet of the pipeline on the equipment is not electrified, so the pipeline is sealed by a lens gasket. The lower flange and the hazel bundle are sealed in a self-tightening sealing and filling sealing mode.
This embodiment 2 can solve rod bundle passageway electrical heating, insulating and sealing performance problem, satisfies the demand that develops rod bundle subassembly thermal technology hydraulic experiment under high temperature heating, the middling pressure condition.
The research results show that the rod bundle channel experiment body in the embodiment 2 realizes the sealing and insulation of the rod bundle channel under the conditions of high-temperature (250 ℃) heating and medium-pressure (3MPa) under the marine motion condition, the rod bundle channel can truly reflect the thermal hydraulic characteristics of the prototype fuel assembly, the two-phase flow visualization experiment can be carried out, and the smooth completion of the rod bundle fuel assembly visualization experiment research under the marine condition is ensured.
The embodiment 2 is a novel rod bundle channel visualization experiment body developed based on actual requirements of rod bundle fuel core research and development under motion conditions according to requirements of rod bundle channel thermal hydraulic visualization experiments on specific electrical property, insulation property, sealing property and the like of the device under medium-pressure heating conditions. The experiment body can better realize the sealing and insulation of the heating assembly under medium-pressure heating conditions, and the heating and flowing characteristics in the reactor core rod bundle fuel assembly are simulated by the heating assembly, the flow channel assembly and other components, so that the influence of ocean conditions on the coolant flow type and the two-phase flowing characteristics of the rod bundle fuel assembly under the heating conditions is researched.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A visual experiment body for an ocean condition rod bundle channel is characterized by comprising an electric heating assembly and a flow channel assembly;
the electric heating component comprises a stainless steel bar bundle, and the stainless steel bar bundle comprises N2Root stainless steel element, said N2The stainless steel elements are combined in an N multiplied by N arrangement mode, wherein N is a natural number more than 1;
the flow channel assembly comprises flow channel plates (3), the flow channel plates (3) are enclosed to form a square channel, the flow channel plates (3) are sealed by high-temperature silicon rubber rings, and the stainless steel rod bundle is positioned in the square channel; the runner plate (3) is provided with a visual window (4), and the visual window (4) is used for observing the condition of the stainless steel bar bundle;
an upper end flange assembly welding piece (2) is arranged at the upper end part of the flow channel assembly, a conductive head (1) is arranged at the other end of the upper end flange assembly welding piece (2), a first channel for the stainless steel bar bundle to pass through is arranged in the upper end flange assembly welding piece (2) and the conductive head (1), the upper end of the stainless steel bar bundle passes through the first channel, and a water outlet communicated with the first channel is further arranged on the upper end flange assembly welding piece (2);
a lower end flange assembly welding piece (6) is arranged at the lower end part of the flow channel assembly, a lower flange (7) is arranged at the other end of the lower end flange assembly welding piece (6), a second channel is arranged in the lower end flange assembly welding piece (6) and the lower flange (7), the lower end of the stainless steel rod bundle penetrates through the lower end flange assembly welding piece (6) and extends into the lower flange (7), and a water inlet communicated with the second channel is further formed in the lower end flange assembly welding piece (6);
the lower end of the stainless steel bar bundle is connected with a conductive block (9) through a soft copper braid (8), and one end, connected with the soft copper braid (8), of the conductive block (9) is clamped into the second channel;
an insulating component is arranged between the electric heating component and the flow passage component.
2. The visualization experiment body for the ocean condition rod bundle channel according to claim 1, wherein an insulating sealing gasket is arranged between the lower end flange assembly welding piece (6) and the lower flange (7), and tongue-and-groove type sealing is adopted between the lower end flange assembly welding piece, the insulating sealing gasket and the lower flange (7).
3. The visualization experiment body for the ocean condition rod cluster channel according to claim 2, wherein the insulating sealing gasket is an asbestos rubber sheet.
4. The ocean condition bundle channel visualization experiment body of claim 1, wherein the electric heating assembly, the flow channel assembly and the insulating assembly are detachably assembled together.
5. The ocean condition bundle channel visualization experiment body according to claim 1, wherein the flow channel plate (3) comprises a plurality of stainless steel plates connected by bolts and nuts.
6. The ocean condition bundle channel visualization experiment body as claimed in claim 1, wherein the visual windows (4) comprise three visual windows, the visual windows (4) are located on the side of the square channel along the bundle direction, and the three visual windows (4) are located at the same section height of the bundle.
7. The ocean condition rod bundle channel visualization experiment body as claimed in claim 6, wherein the shape of the visible window (4) is a rectangle along the direction of hazel bundles, and the material of the visible window (4) is quartz glass.
8. The ocean condition bundle channel visualization experiment body according to claim 1, wherein the insulation component comprises an insulation ceramic piece, the insulation ceramic piece comprises a plurality of ceramic pieces (10), and the ceramic pieces (10) surround and form a square-edge-shaped channel.
9. The visualization experiment body of the ocean condition rod bundle channel according to claim 8, wherein the thickness of the ceramic piece is 3.5-4.5mm, and the ceramic piece is made of a ceramic material with an alumina content of 95%.
10. The marine condition bundle channel visualization experiment body as claimed in claim 1, wherein the seal between the conductive block (9) and the lower flange (7) is a self-tightening seal or a packing seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120227544.7U CN214279620U (en) | 2021-01-27 | 2021-01-27 | Visual experiment body for ocean condition rod bundle channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120227544.7U CN214279620U (en) | 2021-01-27 | 2021-01-27 | Visual experiment body for ocean condition rod bundle channel |
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| Publication Number | Publication Date |
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| CN214279620U true CN214279620U (en) | 2021-09-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202120227544.7U Active CN214279620U (en) | 2021-01-27 | 2021-01-27 | Visual experiment body for ocean condition rod bundle channel |
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| CN (1) | CN214279620U (en) |
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2021
- 2021-01-27 CN CN202120227544.7U patent/CN214279620U/en active Active
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