Rectangular multichannel flow distribution test body

Abstract

The utility model relates to the technical field of fuel assembly multi-channel flow distribution, and provides a rectangular multi-channel flow distribution test body, which comprises a fastener and a plurality of laminated plate bodies, all the plate bodies are connected and fastened by the fastener, and a rectangular narrow slit channel is formed between every two adjacent plate bodies. According to the utility model, the plurality of laminated plate bodies are fastened through the fasteners, the rectangular narrow slit channels are formed between the adjacent plate bodies, the rectangular narrow slit channels are mutually independent and do not interfere with each other, the overall structure is simple, the cost is low, each sub-channel in the fuel assembly can be reduced in equal proportion, and a foundation is laid for a fuel assembly sub-channel flow distribution test.

Description

TECHNICAL FIELD

[0001] The utility model relates to fuel assembly multi -pass flow distribution technical field, specifically, relate to a rectangular multi -pass flow distribution test body. BACKGROUND

[0002] The plate type fuel assembly contains multiple rectangular narrow slit sub -passages, and the size of the sub -passage flow is closely related to the heat carrying capacity of the coolant in the passage, and also has an important influence on the calculation result of the thermal key parameter. In order to further tap the thermal safety margin of the reactor, improve the thermal performance, carry out more refined thermal design, need to carry out fuel assembly sub -passage flow distribution test.

[0003] However, at present, it is simulated to single -pass flow (for example, the patent document with the publication number "CN115985530A"), and there is no test body that can proportionally reduce the multi -pass flow distribution in the fuel assembly, therefore, how to provide a test body that can proportionally reduce the multi -pass flow distribution in the fuel assembly is a problem to be solved in the prior art. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a rectangular multi -pass flow distribution test body, and proportionally reducing each sub -passage in the fuel assembly, laying a foundation for fuel assembly sub -passage flow distribution test.

[0005] The utility model realizes the following technical scheme:

[0006] A rectangular multi -pass flow distribution test body, comprising fastener and a plurality of layers of stacked plate body, fastener connects all plate body fastening, and rectangular narrow slit passage is formed between adjacent plate body.

[0007] Optionally, the plate body of the bottom layer is defined as the bottom plate, the plate body of the top layer is defined as the top plate, and the remaining plate body is defined as the flow channel plate; The thickness of the bottom plate and the thickness of the top plate are both greater than the thickness of the flow channel plate.

[0008] Optionally, one side of the top plate and one side of the flow channel plate are both provided with a rectangular groove for constituting the rectangular narrow slit passage.

[0009] Optionally, at least two corresponding positions on all the plate bodies are provided with pin holes, and a positioning pin is arranged in the pin hole.

[0010] Optionally, each rectangular narrow slit passage is provided with an upper and lower pressure measuring hole, and the pressure measuring hole is connected with a pressure lead pipe for differential pressure measurement.

[0011] Optionally, the pressure lead pipes of the same height are arranged on the two sides of the plate body.

[0012] Optionally, a sealing gasket is arranged between adjacent plate bodies.

[0013] Optionally, the fastener is a combination of a stud, a nut and a gasket.

[0014] Optionally, the test body further comprises two flanges, each of which is arranged at one end of the rectangular narrow slit passage and fixedly connected with the plate body.

[0015] The technical scheme of the utility model has at least the following advantages and beneficial effects: in the utility model, the plate bodies arranged in several layers are fastened by fasteners, rectangular narrow slit passages are formed between adjacent plate bodies, each rectangular narrow slit passage is independent and does not interfere with each other, the overall structure is simple and low in cost, each sub-passage in the fuel assembly can be proportionally reduced, and a foundation is laid for fuel assembly sub-passage flow distribution test. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A front view of a rectangular multi-passage flow distribution test body provided by the utility model;

[0017] Figure 2 A front view of a rectangular multi-passage flow distribution test body provided by the utility model; Figure 1 A front view of a rectangular multi-passage flow distribution test body provided by the utility model;

[0018] Figure 3 A front view of a rectangular multi-passage flow distribution test body provided by the utility model; Figure 1 A front view of a rectangular multi-passage flow distribution test body provided by the utility model;

[0019] Figure 4 A front view of a rectangular multi-passage flow distribution test body provided by the utility model; Figure 1 A front view of a rectangular multi-passage flow distribution test body provided by the utility model;

[0020] Figure 5 A front view of a rectangular multi-passage flow distribution test body provided by the utility model; Figure 1 A front view of a rectangular multi-passage flow distribution test body provided by the utility model;

[0021] Reference signs: 1-flange, 2-lead pressure pipe, 3-fastener, 4-top plate, 5-flow passage plate, 6-bottom plate, 7-sealing gasket, 8-positioning pin. DETAILED DESCRIPTION

[0022] Reference Figure 1 and Figure 2 A rectangular multi-passage flow distribution test body, comprising fasteners 3 and plate bodies arranged in several layers, the fasteners 3 connect and fasten all the plate bodies, rectangular narrow slit passages are formed between adjacent plate bodies, each rectangular narrow slit passage is independent and does not interfere with each other, the overall structure is simple and low in cost, each sub-passage in the fuel assembly can be proportionally reduced, and a foundation is laid for fuel assembly sub-passage flow distribution test.

[0023] For the convenience of description, the plate body of the bottom layer is defined as the bottom plate 6, the plate body of the top layer is defined as the top plate 4, and the rest of the plate bodies are defined as the flow channel plates 5. Since the top plate 4 and the bottom plate 6 directly bear the locking force of the fastener 3, the thickness of the bottom plate 6 and the thickness of the top plate 4 are both greater than the thickness of the flow channel plates 5. In actual application, according to the specific size of the fuel section of the fuel assembly, the corresponding size of the bottom plate 6, the top plate 4 and each flow channel plate 5 is processed, so that each sub-channel in the fuel assembly can be simulated with high precision.

[0024] With reference to Figure 2 , one side of the top plate 4 and one side of the flow channel plate 5 are each provided with a rectangular groove for forming a rectangular narrow slit channel, that is, the top plate 4 and each flow channel plate 5 are saddle-shaped (or "n"-shaped). After the fastener 3 is connected and fastened, each flow channel plate 5 is pressed tightly between the top plate 4 and the bottom plate 6 to form the above-mentioned rectangular narrow slit channel. Further, a sealing gasket 7 is provided between adjacent plate bodies, and the sealing gasket 7 can ensure the sealing effect of each rectangular narrow slit channel after being pressed. It should be understood that a sealing groove for mounting the sealing gasket 7 should be provided on the plate body, and the size of the sealing groove can be implemented according to the relevant standards of static sealing.

[0025] With reference to Figure 1 and Figure 4 , at least two corresponding positions on all plate bodies are provided with pin holes, and a positioning pin 8 is arranged in the pin hole. The positioning pin 8 and the pin hole are in clearance fit, and the single-side clearance size is about 0.03mm to 0.05mm. It is worth noting that the positioning pin 8 can achieve accurate positioning of each plate body, which is convenient for quick installation and ensures installation accuracy.

[0026] With reference to Figure 2 , as an option, the above-mentioned fastener 3 is a combination of a double-headed stud, a nut and a gasket. It should be understood that the fastener 3 is provided with several. In other embodiments, the fastener 3 can of course also be in other forms, for example, a combination of a bolt, a nut and a gasket.

[0027] With reference to Figure 1 and Figure 3 , in this embodiment, each rectangular narrow slit channel is provided with two upper and lower pressure measuring holes. It is easy to understand that the pressure measuring holes are arranged on the side surface of the plate body and communicate with the corresponding rectangular narrow slit channel, and the pressure measuring holes are connected with a pressure lead pipe 2, which can be fixed with the plate body by welding or bonding. In actual application, by measuring the pressure difference between the two upper and lower pressure lead pipes 2 of the corresponding rectangular narrow slit channel, the flow measurement of the corresponding rectangular narrow slit channel can be realized.

[0028] Further, the pressure lead pipes 2 of the same height are arranged on both sides of the plate body in a cross manner. In this way, the interference of the pressure lead pipes 2 can be avoided.

[0029] With reference to Figure 1 and Figure 5On the basis, the test body further comprises two flanges 1, each of which is arranged at one end of the rectangular narrow slit passage and is fixedly connected with the plate body, and the fixedly connected mode is preferably welding. In actual application, one flange 1 is connected to the inlet test section, the other flange 1 is connected to the outlet test section, and after being connected with the test loop, the corresponding test working condition is established, and the fuel assembly sub-channel flow distribution test research can be carried out.

[0030] The above are only preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A rectangular multi-channel flow distribution test body, characterized in that: The invention comprises a fastener and a plurality of stacked plates, wherein the fastener connects and fastens all the plates, and rectangular narrow slit channels are formed between adjacent plates.

2. The rectangular multi-channel flow distribution test body according to claim 1, characterized in that: The plate body at the bottom layer is defined as a bottom plate, the plate body at the top layer is defined as a top plate, and the remaining plate bodies are defined as flow channel plates; the thickness of the bottom plate and the thickness of the top plate are both greater than the thickness of the flow channel plate.

3. The rectangular multi-channel flow distribution test body according to claim 2, characterized in that: One side of the top plate and one side of the flow channel plate are both provided with rectangular grooves for forming the rectangular narrow slit channels.

4. The rectangular multi-channel flow distribution test body according to claim 1, characterized in that: At least two corresponding positions on all the plates are provided with pin holes, and positioning pins are passed through the pin holes.

5. The rectangular multi-channel flow distribution test body according to claim 1, characterized in that: Each of the rectangular narrow slit channels is provided with two upper and lower pressure measuring holes, and the pressure measuring holes are connected to pressure-leading pipes for measuring differential pressure.

6. The rectangular multi-channel flow distribution test body according to claim 5, characterized in that: The pressure-inducing pipes at the same height are cross-arranged on both sides of the plate body.

7. The rectangular multi-channel flow distribution test body according to claim 1, characterized in that: Sealing pads are provided between adjacent plates.

8. The rectangular multi-channel flow distribution test body according to claim 1, characterized in that: The fastener is a combination of a stud, a nut and a washer.

9. The rectangular multi-channel flow distribution test body according to claim 1, characterized in that: The test body further includes two flanges, each of which is arranged at one end of the rectangular narrow slot channel and is fixedly connected to the plate body.

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