Position checking device and method for choke plug assembly
By designing a position degree inspection device including a detection plate and a leg, using hole tests to check the position degree of the occlusion assembly, the cumbersome detection problems in the prior art are solved, and efficient and accurate position degree detection is achieved.
Patent Information
- Application Number
- CN202411330412.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2025-01-14
AI Technical Summary
In the prior art, the positionality check of the choke block assembly is cumbersome and takes a long time, making it difficult to improve measurement efficiency and accuracy.
A position degree inspection device including a detection plate and multiple legs is designed. There are multiple holes on both sides of the detection plate. The number and position of the holes are consistent with the number and layout of the occlusion rods. The hole test of the detection plate is inspected. The position of the blocking assembly.
The device simplifies the detection process and improves the detection efficiency. It is suitable for a million kilowatt-level nuclear power unit. By intuitively checking the position degree, it realizes efficient position degree detection.
Smart Images
Figure CN119309472A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of nuclear power, and in particular relates to a position inspection device and method for a baffle assembly. Background Art
[0002] The choke assembly does not directly control the reactivity of the reactor, but it is necessary to place the choke assembly in the guide tube where the control rods, burnable poison rods and neutron source are inserted into the fuel assembly to increase the coolant water flow resistance, limit the bypass flow in the guide tube and balance the flow of the fuel assembly. Figure 1 As shown, the choke plug assembly is usually composed of a connecting plate component and 24 choke plug rods made of stainless steel. After the choke plug rods are assembled, the position of the rods needs to be checked. Since the control rods, combustible poison rods and guide tubes are all narrow and long tubular objects, conventional inspection tools such as calipers and height gauges are not convenient for inspection. The related technology uses a three-coordinate measuring instrument to establish a measurement benchmark to measure the position of the 24 choke plug rods of the choke plug assembly, but the measurement is cumbersome and takes a long time. Therefore, how to improve the efficiency and accuracy of the choke plug assembly position measurement has become an urgent problem to be solved. Summary of the invention
[0003] In order to overcome the problems existing in the related art, a position inspection device and method for a baffle assembly are provided.
[0004] According to one aspect of an embodiment of the present disclosure, there is provided a position inspection device for a baffle assembly, the device comprising a detection plate and a plurality of legs connected to the lower edge of the detection plate;
[0005] Multiple holes are opened on both sides of the test plate along the thickness direction, and the number of holes and the position layout of each hole are consistent with the number and position layout of the choke rods to be tested;
[0006] Each foot is of the same height and is used to contact the inspection platform and support the inspection board.
[0007] In a possible implementation, the detection plate has a length between 209.5 and 210.5 mm, a width between 209.5 and 210.5 mm, and a thickness of not less than 80 mm.
[0008] In a possible implementation, each leg has a height between 199.5 and 200.5 mm and a diameter between 23.5 and 24.5 mm.
[0009] In a possible implementation, each support leg may be, for example, column-shaped.
[0010] In a possible implementation, the diameter of each hole is between 11.18 and 11.23 mm, and the position tolerance of each hole is φ0.05 mm.
[0011] In a possible implementation, the entire device is made of stainless steel.
[0012] According to another aspect of an embodiment of the present disclosure, a method for checking the position of a baffle assembly is provided, the method comprising:
[0013] Step 100, fix the inspection device horizontally on the inspection platform, and wipe the flow block assembly and the position inspection device with silk cloth or cotton cloth dipped in anhydrous ethanol or acetone until there is no stain;
[0014] Step 101, lift the two sides of the blocking plug assembly to hold down the system at the same time, align each blocking plug rod in the blocking plug assembly with a corresponding hole in the inspection device, and vertically place each blocking plug assembly into the hole;
[0015] Step 102, if the choke assembly passes the position inspection device smoothly by its own weight without lubrication, the position inspection of the choke assembly is qualified; if the choke assembly is stuck in the hole of the inspection device without lubrication, the position inspection of the choke assembly is unqualified.
[0016] In a possible implementation, the method further includes:
[0017] Step 103, perform an appearance inspection on the baffle assembly after the position inspection, and there should be no dirt, scratches exceeding technical requirements, etc.
[0018] In a possible implementation, the method further includes:
[0019] Step 104, calibrate the inspection device at a preset period, the calibration period is not less than 12 months, and the calibration content includes whether there are scratches, dents, and pits on the surface.
[0020] In a possible implementation, the inspection platform has an accuracy better than Class 2, a length of at least 1000 mm, and a width of at least 1000 mm.
[0021] The beneficial effects of the present disclosure are as follows: the position inspection device for the choke plug assembly of the present disclosure is applicable to a million-kilowatt nuclear power unit, the bench-shaped structure of the present disclosure is simple and easy to use, and the position of the choke plug assembly can be visually inspected through the hole test of the ground choke plug, thereby improving the inspection efficiency. The inspection device of the present disclosure has been successfully applied to the inspection of the choke plug assembly for the domestic million-kilowatt nuclear power unit, and a batch of choke plug assemblies have been put into operation with good results. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 A schematic diagram of a choke plug assembly is shown as an example.
[0023] Figure 2A schematic diagram of a position inspection device for a baffle assembly according to an embodiment of the present disclosure. DETAILED DESCRIPTION
[0024] The present disclosure is further described in detail below with reference to the accompanying drawings and specific embodiments.
[0025] Unless otherwise defined, the technical and scientific terms used in the present disclosure have the same meanings as those generally understood by those skilled in the art to which the present disclosure belongs; the terms used in the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure; the term "including" and any variations thereof in the present disclosure are intended to cover non-exclusive inclusions. Obviously, the embodiments described in the present disclosure are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making creative efforts are within the scope of protection of the present disclosure.
[0026] Reference to "embodiments" in this disclosure means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the disclosure. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.
[0027] Figure 1 A schematic diagram of a flow control plug assembly is shown as an example. Figure 1 As shown, the manufacturing process of the choke plug assembly includes a rod installation process, a spot welding process, a testing process, etc. 24 choke plug rods 1 are installed into the 24 holes of the clamping system in the order of the inner ring first and the outer ring later, and are fixed by spot welding with 24 nuts and pins. This type of choke plug assembly includes multiple choke plug rods 1, a clamping system 2, a pin 3, and a nut 4. Each nut and the corresponding pin have a welding point 5 through the spot welding process.
[0028] Figure 2 This is a schematic diagram of a position inspection device for a baffle assembly according to an embodiment of the present disclosure, see Figure 1 and Figure 2The position inspection device disclosed in the present invention is in the shape of a square stool as a whole. The device includes a detection plate and a plurality of legs connected to the lower edge of the detection plate. The whole device is made of stainless steel. The length of the detection plate is between 209.5 and 210.5 mm, the width is between 209.5 and 210.5 mm, and the thickness is not less than 80 mm. Multiple holes are opened on both sides of the detection plate along the thickness direction. The number of holes and the position layout of each hole are consistent with the number and position layout of the flow blocking plug rods to be detected (for example, 24 holes). The diameter of each hole is between 11.18 and 11.23 mm, and the position tolerance of each hole is φ0.05 mm. See Figure 2 , as shown in the schematic diagram of the layout of each hole. A plurality of legs are fixedly connected under the detection board, each leg having a height of 199.5 to 200.5 mm and a diameter of 23.5 to 24.5 mm, and each leg can be, for example, columnar.
[0029] Before testing, place the inspection device on the inspection platform, and use silk or cotton cloth dipped in anhydrous ethanol or acetone to wipe the surface of the choke assembly rod and each hole of the inspection device. During the test, lift the choke assembly with both hands to press the two sides of the system, align each choke rod of the choke assembly with a hole of the inspection device, and insert it vertically into the hole. If each choke rod of the choke assembly passes the corresponding 24 holes of the position inspection device smoothly under the weight of the choke assembly without lubrication, the position inspection of the choke assembly is qualified. Otherwise, the position inspection is unqualified.
[0030] In one application example,
[0031] Step 100, fix the inspection device horizontally on the inspection platform (the inspection platform has an accuracy better than Class 2, is at least 1000 mm long and 1000 mm wide) to facilitate the insertion of the choke assembly. Use silk or cotton cloth dipped in anhydrous ethanol or acetone to wipe the choke assembly and the position inspection device until there is no stain.
[0032] Step 101, lift the two sides of the choke assembly to hold down the system at the same time, align each choke rod in the choke assembly with a corresponding hole in the inspection device, and place each choke assembly vertically into the hole.
[0033] Step 102, if the choke assembly passes the position inspection device smoothly by its own weight without lubrication, the position inspection of the choke assembly is qualified; if the choke assembly is stuck in the hole of the inspection device without lubrication, the position inspection of the choke assembly is unqualified.
[0034] Step 103, perform an appearance inspection on the baffle assembly after the position inspection, and there should be no dirt, scratches exceeding technical requirements, etc.
[0035] Step 104, calibrate the inspection device at a preset period, the calibration period shall not be less than 12 months, and the calibration content shall include but not be limited to whether there are scratches, dents, and pits on the surface.
[0036] The disclosed device for checking the position of the choke plug assembly is suitable for a million-kilowatt nuclear power unit. The disclosed bench-shaped structure is simple and easy to use. The position of the choke plug assembly can be visually checked by the choke plug through hole test, thereby improving the detection efficiency. The disclosed inspection device has been successfully applied to the inspection of the choke plug assembly for domestic million-kilowatt nuclear power units. The batch of choke plug assemblies have been put into operation with good results.
[0037] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.
Claims
1. A device for checking the position of a choke assembly, characterized in that: The device comprises a detection plate and a plurality of legs connected to the lower edge of the detection plate; Multiple holes are opened on both sides of the test plate along the thickness direction, and the number of holes and the position layout of each hole are consistent with the number and position layout of the choke rods to be tested; Each foot is of the same height and is used to contact the inspection platform and support the inspection board.
2. The device according to claim 1, characterized in that The length of the test board is between 209.5 and 210.5 mm, the width is between 209.5 and 210.5 mm, and the thickness is not less than 80 mm.
3. The device according to claim 1, characterized in that Each leg is between 199.5 and 200.5 mm high and between 23.5 and 24.5 mm in diameter.
4. The device according to claim 1, characterized in that Each foot may be column-shaped, for example.
5. The device according to claim 1, characterized in that The diameter of each hole is between 11.18 and 11.23 mm, and the position tolerance of each hole is φ0.05 mm.
6. The device according to claim 1, characterized in that The device is made entirely of stainless steel.
7. A method for checking the position of a choke assembly, characterized in that: The method comprises: Step 100, fix the inspection device horizontally on the inspection platform, and wipe the flow block assembly and the position inspection device with silk cloth or cotton cloth dipped in anhydrous ethanol or acetone until there is no stain; Step 101, lift the two sides of the blocking plug assembly to hold down the system at the same time, align each blocking plug rod in the blocking plug assembly with a corresponding hole in the inspection device, and vertically place each blocking plug assembly into the hole; Step 102, if the choke assembly passes the position inspection device smoothly by its own weight without lubrication, the position inspection of the choke assembly is qualified; if the choke assembly is stuck in the hole of the inspection device without lubrication, the position inspection of the choke assembly is unqualified.
8. The method according to claim 7, characterized in that The method further comprises: Step 103, perform an appearance inspection on the baffle assembly after the position inspection, and there should be no dirt, scratches exceeding technical requirements, etc.
9. The method according to claim 7, characterized in that: The method further comprises: Step 104, calibrate the inspection device at a preset period, the calibration period is not less than 12 months, and the calibration content includes whether there are scratches, dents, and pits on the surface.
10. The method according to claim 7, characterized in that The accuracy of the inspection platform is better than Class 2, and the length is at least 1000mm and the width is at least 1000mm.