Abrasion test equipment for control rod guide mechanism

Abstract

The utility model relates to the technical field of control rod abrasion tests, and discloses control rod guide mechanism abrasion test equipment which comprises a containing base, an abrasion sensitive area component detachably installed on the containing base and used for containing a control rod, and a fixing piece used for fixing the control rod. The first electromagnetic vibrator is used for applying impact load to the control rod; the second electromagnetic vibrator is used for applying wear displacement to the control rod; and the displacement sensor is used for measuring the displacement distance of the control rod. The control rod guide mechanism abrasion test equipment provides a solution for out-of-pile effective simulation of a control rod abrasion phenomenon containing multiple complex modes, can be used for researching various abrasion problems possibly occurring between a control rod and a guide mechanism, and provides support for research of a control rod abrasion mechanism and rule; and support is provided for improving the service reliability of the control rod, so that the safety and economy of nuclear power unit operation are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of control rod abrasion testing, in particular to a control rod guide mechanism abrasion testing device. Background Art

[0002] During the service, Figure 1 As shown, the vibrations generated by the control rod 2 during the up and down stepping process or under the action of fluid force may cause abrasion with its guide mechanism 10. The abrasion reduces the mechanical strength of the control rod 2 cladding and increases fatigue. In severe cases, it will affect the structural integrity of the cladding and cause control rod failure. Abrasion test is an important means to study the abrasion problem of control rod cladding. The test device generally includes a friction pair of the control rod cladding and a simulated guide mechanism. Due to the contact during the abrasion test (changes in shape and material), a new control rod cladding and a friction pair of the simulated guide mechanism need to be replaced after each abrasion test. Considering that abrasion often occurs mainly in abrasion-sensitive areas, other areas are little affected by abrasion before and after the test. Therefore, it is necessary to design an abrasion mechanism that focuses on abrasion-sensitive areas, and each new test only requires the replacement of structural parts in the abrasion-sensitive area. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a control rod guide mechanism abrasion test equipment.

[0004] The technical solution adopted by the utility model to solve the technical problem is: construct a control rod guide mechanism abrasion test equipment, which includes a receiving base, an abrasion sensitive area component detachably mounted on the receiving base and used to receive the control rod, a fixing member used to fix the control rod, a first electromagnetic vibrator used to apply an impact load to the control rod, a second electromagnetic vibrator used to apply abrasion displacement to the control rod, and a displacement sensor used to measure the displacement distance of the control rod;

[0005] The abrasion sensitive area component is provided with a receiving groove for receiving the control rod, the receiving groove is composed of a guide section and an abrasion positioning section, the abrasion positioning section is located below the guide section, the guide section is arc-shaped and part of it is in linear contact with the control rod at least.

[0006] In some embodiments, the accommodating groove has a central axis, the complete arc surface formed by the guide segment is a reference arc surface, a reference circle is tangent to the reference arc surface, the radius of the reference circle is 1.1 times the radius of the control rod, the center of the reference circle is the reference center of the circle, and the reference center of the circle is located on the central axis.

[0007] In some embodiments, the abrasion positioning segment is in a complete arc shape, and the radius of the abrasion positioning segment is 1.1 times the radius of the control rod.

[0008] In some embodiments, the center of the abrasive positioning segment is located on the central axis, and the distance between the center of the abrasive positioning segment and the reference center is greater than 0 micrometers and less than or equal to 25 micrometers.

[0009] In some embodiments, the center of the abrasive positioning segment is located on the central axis, and the distance between the center of the abrasive positioning segment and the reference center is greater than 25 microns and less than or equal to 75 microns.

[0010] In some embodiments, the center of the abrasive positioning segment is located on the central axis, and the distance between the center of the abrasive positioning segment and the reference center is greater than 75 microns.

[0011] In some embodiments, the abrasion positioning section is arc-shaped, a groove is provided in the middle of the abrasion positioning section, and the radius of the abrasion positioning section is 1.1 times the radius of the control rod.

[0012] In some embodiments, the center of the abrasive positioning segment is located on the central axis, the distance between the center of the abrasive positioning segment and the reference center is greater than 0 microns and less than or equal to 25 microns, and the width of the groove is less than or equal to 75% of the control rod diameter.

[0013] In some embodiments, the center of the abrasive positioning segment is located on the central axis, the distance between the center of the abrasive positioning segment and the reference center is greater than 25 microns and less than or equal to 75 microns, and the width of the groove is greater than 75% of the diameter of the control rod and less than or equal to 90% of the diameter of the control rod.

[0014] In some embodiments, the center of the abrasive positioning segment is located on the central axis, the distance between the center of the abrasive positioning segment and the reference center is greater than 75 microns, and the width of the groove is greater than 90% of the diameter of the control rod.

[0015] The implementation of the utility model has the following beneficial effects: the control rod guide mechanism abrasion test equipment adopts a first electromagnetic vibrator, a second electromagnetic vibrator and abrasion sensitive area components of different specifications, providing a solution for effective off-pile simulation of control rod abrasion phenomena containing various complex modes, and can be used to study various types of abrasion problems that may occur between control rods and guide mechanisms, providing support for the study of the mechanism and laws of control rod abrasion, and providing support for improving the service reliability of control rods, thereby improving the safety and economy of nuclear power unit operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the utility model, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show certain embodiments of the utility model, and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0017] Figure 1 It is a schematic diagram of the coordination between the control rod and the guide mechanism in actual application;

[0018] Figure 2 is a schematic diagram of the overall structure of a control rod guide mechanism abrasion test equipment in some embodiments of the utility model;

[0019] Figure 3 It is a schematic diagram of the cooperation between the accommodating base and the arc-shaped abrasion sensitive area component in some embodiments of the utility model;

[0020] Figure 4 It is a schematic diagram of the cooperation between the accommodating base and the open groove type abrasion sensitive area component in some embodiments of the utility model;

[0021] Figure 5 It is a schematic diagram of the structure of the containing groove in some embodiments of the utility model;

[0022] Figure 6 It is a schematic diagram of the structure of the components in the slightly abrasive arc-shaped abrasion sensitive area;

[0023] Figure 7 It is a schematic diagram of the structure of the moderately abrasive arc-shaped abrasion sensitive area component;

[0024] Figure 8 It is a schematic diagram of the structure of the components in the severely abrasive arc-shaped abrasion sensitive area;

[0025] Fig. 9 It is a schematic diagram of the structure of the components in the abrasion sensitive area of ​​the slightly abrasive open groove;

[0026] Fig.10 It is a schematic diagram of the structure of the components in the abrasion sensitive area of ​​the moderately abrasive open groove;

[0027] Fig.11 It is a schematic diagram of the structure of the components in the abrasion sensitive area of ​​the heavy abrasion open groove. DETAILED DESCRIPTION

[0028] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0029] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0030] See also Figures 2 to 11, is a control rod guide mechanism abrasion test equipment in some embodiments of the utility model, which is used to test and study the wear law of the control rod cladding under different structures. The control rod guide mechanism abrasion test equipment specifically includes a receiving base 1, an abrasion sensitive area component 3 detachably mounted on the receiving base 1 and used to receive the control rod 2, a fixing part 4 for fixing the control rod 2, a first electromagnetic vibrator 5 for applying an impact load to the control rod 2, a second electromagnetic vibrator 6 for applying abrasion displacement to the control rod 2, and a displacement sensor 7 for measuring the displacement distance of the control rod 2. Specifically, a hole can be drilled on the accommodating base 1, and the accommodating base 1 can be fixed to the test bench by bolts. The accommodating base 1 has a accommodating groove 11 for accommodating the abrasion sensitive area component 3. Three connecting holes can be opened on the left side, lower middle part and right side of the accommodating groove 11. At the same time, three connecting holes corresponding to the above three connecting holes are also opened on the left side, lower middle part and right side of the outer wall of the abrasion sensitive area component 3. A perforated thick iron sheet can be used between the accommodating base 1 and the abrasion sensitive area component 3, and the accommodating base 1 and the abrasion sensitive area component 3 are fixedly connected together by bolts. This detachable method can facilitate the replacement of abrasion sensitive area components 3 of different specifications and can achieve rapid assembly.

[0031] In addition, the shape of the fixing member 4 matches the control rod 2, and cooperates with the accommodating base 1 to fix the control rod 2. The first electromagnetic vibrator 5 and the second electromagnetic vibrator 6 cooperate to simulate the abrasion process of the control rod 2. The displacement sensor 7 is preferably a laser displacement sensor 7. The first electromagnetic vibrator 5, the second electromagnetic vibrator 6 and the laser displacement sensor 7 can all be mature products of the existing technology.

[0032] The abrasion sensitive area component 3 is provided with a receiving groove 31 for receiving the control rod 2. The receiving groove 31 is composed of a guide section 311 and an abrasion positioning section 312. The abrasion positioning section 312 is located below the guide section 311. The guide section 311 is arc-shaped and part of it is at least in line contact with the control rod 2. The receiving groove 11 has an arc-shaped section connected to the guide section 311 and having the same size above, so as to form a space for receiving the control rod 2.

[0033] The receiving groove 31 has a central axis. The complete arc surface formed by the guide section 311 is a reference arc surface. A reference circle is tangent to the reference arc surface. The radius of the reference circle is 1.1 times the radius of the control rod 2. The center of the reference circle is the reference center, which is located on the central axis. Figure 5 As shown, the central axis is the line segment A shown in the figure, the reference arc surface is the point B shown in the figure, the center of the reference arc surface is the point E shown in the figure, the reference circle is the point D shown in the figure, and the center of the reference circle is C0 shown in the figure.

[0034] Furthermore, due to the vibration generated by the control rod 2 during the up and down stepping process or under the action of fluid force in actual application, abrasion may occur with its guide mechanism, and the abrasion sensitive area component 3 can be used to simulate different structures and different abrasion degrees of the guide mechanism. The abrasion sensitive area component 3 can be of various types to realize experimental research under different abrasion degrees of different abrasion sensitive area component 3 structures. The abrasion sensitive area component 3 mainly includes two main types: arc-shaped abrasion sensitive area component and open groove-shaped abrasion sensitive area component. The abrasion positioning sections 312 of the arc-shaped abrasion sensitive area component and the open groove-shaped abrasion sensitive area component are constructed with reference to the above-mentioned central axis, reference circle, and reference arc surface.

[0035] The structure of the arc-shaped abrasion sensitive area component is as follows: the abrasion positioning section 312 is in a complete arc shape, and the radius of the abrasion positioning section 312 is 1.1 times the radius of the control rod 2. At the same time, in order to realize the experimental research under different abrasion degrees of different abrasion sensitive area components 3 structures, the arc-shaped abrasion sensitive area components can be divided into three types, namely, a lightly abraded arc-shaped abrasion sensitive area component, a moderately abraded arc-shaped abrasion sensitive area component, and a heavily abraded arc-shaped abrasion sensitive area component. In the following figures, the distance represented by the size is appropriately enlarged for clearer reference.

[0036] Specifically, Figure 6 As shown, the structure of the slightly abrasive circular arc type abrasive sensitive area component is as follows: the center of the abrasive positioning segment 312 is located on the central axis, the distance between the center of the abrasive positioning segment 312 and the reference center is greater than 0 microns and less than or equal to 25 microns, the center of the abrasive positioning segment 312 of the slightly abrasive circular arc type abrasive sensitive area component is C1 as shown in the figure, the distance between the center of the abrasive positioning segment 312 of the slightly abrasive circular arc type abrasive sensitive area component and the reference center is L1 as shown in the figure, and the dividing point between the abrasive positioning segment 312 and the guide segment 311 of the slightly abrasive circular arc type abrasive sensitive area component is F1 as shown in the figure.

[0037] like Figure 7 As shown, the structure of the moderate abrasion arc-shaped abrasion sensitive area component is as follows: the center of the abrasion positioning section 312 is located on the central axis, and the distance between the center of the abrasion positioning section 312 and the reference center is greater than 25 microns and less than or equal to 75 microns. The center of the abrasion positioning section 312 of the moderate abrasion arc-shaped abrasion sensitive area component is C2 as shown in the figure, the distance between the center of the abrasion positioning section 312 of the moderate abrasion arc-shaped abrasion sensitive area component and the reference center is L2 as shown in the figure, and the dividing point between the abrasion positioning section 312 and the guide section 311 of the moderate abrasion arc-shaped abrasion sensitive area component is F2 as shown in the figure.

[0038] like Figure 8As shown, the structure of the heavy abrasion arc-shaped abrasion sensitive area component is as follows: the center of the abrasion positioning section 312 is located on the central axis, and the distance between the center of the abrasion positioning section 312 and the reference center is greater than 75 microns. The center of the abrasion positioning section 312 of the heavy abrasion arc-shaped abrasion sensitive area component is C3 as shown in the figure, the distance between the center of the abrasion positioning section 312 of the heavy abrasion arc-shaped abrasion sensitive area component and the reference center is L3 as shown in the figure, and the dividing point between the abrasion positioning section 312 and the guide section 311 of the heavy abrasion arc-shaped abrasion sensitive area component is F3 as shown in the figure.

[0039] Generally speaking, the abrasion positioning sections 312 of the lightly abraded arc-shaped abrasion sensitive area component, the moderately abraded arc-shaped abrasion sensitive area component, and the heavily abraded arc-shaped abrasion sensitive area component are cut from top to bottom in sequence based on the reference circle.

[0040] In addition, the structure of the open slot type abrasion sensitive area component is as follows: the abrasion positioning section 312 is arc-shaped, and a groove 313 is provided in the middle of the abrasion positioning section 312. The setting of the groove 313 can solve the space limitation of radial impact, and the radius of the abrasion positioning section 312 is 1.1 times the radius of the control rod 2. At the same time, in order to realize the experimental research of different abrasion sensitive area components 3 structures with different abrasion degrees, the open slot type abrasion sensitive area component 3 can be divided into three types, namely, a lightly abrasive open slot abrasion sensitive area component, a moderately abrasive open slot abrasion sensitive area component, and a heavily abrasive open slot abrasion sensitive area component.

[0041] like Fig. 9 As shown, the structure of the slightly abrasive open groove abrasive sensitive area component is as follows: the center of the abrasive positioning section 312 is located on the central axis, the distance between the center of the abrasive positioning section 312 and the reference center is greater than 0 microns and less than or equal to 25 microns, and the width of the groove 313 is less than or equal to 75% of the diameter of the control rod 2. The center of the abrasive positioning section 312 of the slightly abrasive open groove abrasive sensitive area component is C4 as shown in the figure, the distance between the center of the abrasive positioning section 312 of the slightly abrasive open groove abrasive sensitive area component and the reference center is L4 as shown in the figure, the width of the groove 313 is D1 as shown in the figure, and the dividing point between the abrasive positioning section 312 and the guide section 311 of the slightly abrasive open groove abrasive sensitive area component is F4 as shown in the figure.

[0042] like Fig.10As shown, the structure of the moderate abrasion open groove abrasion sensitive area component is as follows: the center of the abrasion positioning section 312 is located on the central axis, the distance between the center of the abrasion positioning section 312 and the reference center is greater than 25 microns and less than or equal to 75 microns, and the width of the groove 313 is greater than 75% of the diameter of the control rod 2 and less than or equal to 90% of the diameter of the control rod 2. The center of the abrasion positioning section 312 of the moderate abrasion open groove abrasion sensitive area component is C5 as shown in the figure, the distance between the center of the abrasion positioning section 312 of the moderate abrasion open groove abrasion sensitive area component and the reference center is L5 as shown in the figure, the width of the groove 313 is D2 as shown in the figure, and the dividing point between the abrasion positioning section 312 and the guide section 311 of the moderate abrasion open groove abrasion sensitive area component is F5 as shown in the figure.

[0043] like Fig.11 As shown, the structure of the heavy abrasion open groove abrasion sensitive area component is as follows: the center of the abrasion positioning section 312 is located on the central axis, the distance between the center of the abrasion positioning section 312 and the reference center is greater than 75 microns, and the width of the groove 313 is greater than 90% of the diameter of the control rod 2. The center of the abrasion positioning section 312 of the heavy abrasion open groove abrasion sensitive area component is C6 as shown in the figure, the distance between the center of the abrasion positioning section 312 of the heavy abrasion open groove abrasion sensitive area component and the reference center is L5 as shown in the figure, the width of the groove 313 is D2 as shown in the figure, and the dividing point between the abrasion positioning section 312 and the guide section 311 of the heavy abrasion open groove abrasion sensitive area component is F6 as shown in the figure.

[0044] In general, the abrasion positioning sections 312 of the lightly abraded open groove abrasion sensitive area component, the moderately abraded open groove abrasion sensitive area component, and the heavily abraded open groove abrasion sensitive area component are cut from top to bottom in sequence based on the reference circle, and the width of the groove 313 increases in sequence.

[0045] In the above description, the wear sensitive area component 3 has six different structural forms. In actual operation, more wear sensitive area components 3 with different structural forms can be provided according to actual needs.

[0046] In summary, the control rod guide mechanism abrasion test equipment uses the first electromagnetic vibrator 5, the second electromagnetic vibrator 6 and the abrasion sensitive area components 3 of different specifications, providing a solution for the effective simulation of the control rod abrasion phenomenon outside the pile with multiple complex modes, and can be used to study various abrasion problems that may occur between the control rod 2 and the guide mechanism, provide support for the study of the mechanism and law of control rod abrasion, and provide support for improving the service reliability of the control rod 2, thereby improving the safety and economy of the operation of the nuclear power unit. In addition, test materials can be saved during the test research process.

[0047] It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the utility model. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the utility model, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should fall within the scope of the claims of the utility model.

Claims

1. A control rod guide mechanism abrasion test equipment, characterized in that: The invention comprises a receiving base (1), an abrasion sensitive area component (3) detachably mounted on the receiving base (1) and used to receive a control rod (2), a fixing member (4) used to fix the control rod (2), a first electromagnetic vibrator (5) used to apply an impact load to the control rod (2), a second electromagnetic vibrator (6) used to apply abrasion displacement to the control rod (2), and a displacement sensor (7) used to measure the displacement distance of the control rod (2); The abrasion sensitive area component (3) is provided with a receiving groove (31) for receiving the control rod (2); the receiving groove (31) is composed of a guide section (311) and an abrasion positioning section (312); the abrasion positioning section (312) is located below the guide section (311); the guide section (311) is arc-shaped and part of it is in line contact with the control rod (2).

2. The control rod guide mechanism abrasion test equipment according to claim 1, characterized in that: The accommodating groove (31) has a central axis, the complete arc surface formed by the guide section (311) is a reference arc surface, a reference circle is tangent to the reference arc surface, the radius of the reference circle is 1.1 times the radius of the control rod (2), the center of the reference circle is the reference center, and the reference center is located on the central axis.

3. The control rod guide mechanism abrasion test equipment according to claim 2, characterized in that: The abrasive positioning section (312) is in a complete arc shape, and the radius of the abrasive positioning section (312) is 1.1 times the radius of the control rod (2).

4. The control rod guide mechanism abrasion test equipment according to claim 3, characterized in that: The center of the abrasive positioning section (312) is located on the central axis, and the distance between the center of the abrasive positioning section (312) and the reference center is greater than 0 micrometers and less than or equal to 25 micrometers.

5. The control rod guide mechanism abrasion test equipment according to claim 3, characterized in that: The center of the abrasive positioning section (312) is located on the central axis, and the distance between the center of the abrasive positioning section (312) and the reference center is greater than 25 micrometers and less than or equal to 75 micrometers.

6. The control rod guide mechanism abrasion test equipment according to claim 3, characterized in that: The center of the abrasive positioning section (312) is located on the central axis, and the distance between the center of the abrasive positioning section (312) and the reference center is greater than 75 micrometers.

7. The control rod guide mechanism abrasion test equipment according to claim 3, characterized in that: The abrasive positioning section (312) is arc-shaped, a groove (313) is provided in the middle of the abrasive positioning section (312), and the radius of the abrasive positioning section (312) is 1.1 times the radius of the control rod (2).

8. The control rod guide mechanism abrasion test equipment according to claim 7, characterized in that: The center of the abrasive positioning section (312) is located on the central axis, the distance between the center of the abrasive positioning section (312) and the reference center is greater than 0 micrometers and less than or equal to 25 micrometers, and the width of the groove (313) is less than or equal to 75% of the diameter of the control rod (2).

9. The control rod guide mechanism abrasion test equipment according to claim 7, characterized in that: The center of the abrasive positioning section (312) is located on the central axis, the distance between the center of the abrasive positioning section (312) and the reference center is greater than 25 microns and less than or equal to 75 microns, and the width of the groove (313) is greater than 75% of the diameter of the control rod (2) and less than or equal to 90% of the diameter of the control rod (2).

10. The control rod guide mechanism abrasion test equipment according to claim 7, characterized in that: The center of the abrasive positioning section (312) is located on the central axis, the distance between the center of the abrasive positioning section (312) and the reference center is greater than 75 microns, and the width of the groove (313) is greater than 90% of the diameter of the control rod (2).

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