Loading device for boric acid test of concrete test piece of containment boric acid pool of nuclear power plant

Abstract

The utility model particularly relates to a boric acid test loading device for a concrete test piece of a containment boric acid pool of a nuclear power plant. The boric acid test loading device comprises the concrete test piece, a loading frame, a loading frame bolt, a sensor bracket and a strain sensor, a loading frame and a sensor bracket are respectively mounted on two opposite side surfaces of the concrete test piece; loading frame bolts are arranged between the loading frames; a strain sensor is installed between the sensor supports. According to the boric acid test loading device for the concrete test piece of the containment vessel boric acid pool of the nuclear power plant, the test work of the influence of boric acid corrosion on the basic mechanical property of the concrete test piece under different stress states is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to nuclear power plant safety shell boric acid pool concrete performance test technical field especially relates to a kind of nuclear power plant safety shell boric acid pool concrete test piece boric acid test loading device. BACKGROUND

[0002] Nuclear power plant safety shell refueling pool solution contains about 0.27% boric acid, in the service process of refueling pool, boric acid in pool gradually infiltrates and diffuses to peripheral reinforced concrete along steel plate and weld leakage point, resulting in the decrease of reinforced concrete strength and durability. The traditional concrete corrosion resistance test method mainly tests and studies the basic mechanical properties of concrete test piece under different concentration boric acid soaking environment. However, for this kind of research method, the following defects exist:

[0003] Nuclear power plant safety shell boric acid pool concrete test piece is usually subjected to load from pool solution in actual service process, and is in a high stress level state, and the traditional test method does not consider the influence of boric acid corrosion on the basic mechanical properties of concrete test piece under different stress states. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of nuclear power plant safety shell boric acid pool concrete test piece boric acid test loading device, to realize the test work of the influence of boric acid corrosion on the basic mechanical properties of concrete test piece under different stress states.

[0005] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A kind of nuclear power plant safety shell boric acid pool concrete test piece boric acid test loading device, including concrete test piece, loading frame, loading frame bolt, sensor support and strain sensor;Two opposite sides of concrete test piece are respectively installed loading frame and sensor support;Loading frame bolt is installed between loading frame;Strain sensor is installed between sensor support.

[0007] As one of the realizable ways, the two opposite sides of the concrete test piece are non-pouring surfaces of the concrete test piece.

[0008] As one of the realizable ways, the concrete test piece is a cuboid or a cube structure.

[0009] As one of the realizable ways, the two opposite sides of the concrete test piece are the top surface and the bottom surface of the concrete test piece.

[0010] As one of the realizable ways, a plurality of loading frame bolts are diagonally installed between the loading frames.

[0011] As one of the implementable ways, a plurality of sensor supports are symmetrically installed on two opposite sides of the concrete test piece respectively; the sensor supports are installed on the concrete test piece through sensor support bolts; and strain sensors are installed between the sensor supports.

[0012] As one of the implementable ways, the concrete test piece is made according to the mixing ratio required by the boric acid test of the concrete test piece.

[0013] As one of the implementable ways, the loading frame is made of high-strength boric acid corrosion-resistant material and does not deform during the loading process of the concrete test piece and the boric acid test process; the loading frame bolt is made of high-strength boric acid corrosion-resistant material, the sensor support is made of high-strength material, and the sensor support bolt is made of high-strength material.

[0014] As one of the implementable ways, the two opposite sides of the concrete test piece are coated with an interface agent before the loading frame is installed.

[0015] As one of the implementable ways, the interface agent is cement mortar or neat paste.

[0016] The beneficial technical effects of the utility model are as follows:

[0017] The boric acid test loading device for the concrete test piece of the boric acid pool of the containment of the nuclear power plant realizes the test work of the influence of boric acid corrosion under different stress states on the basic mechanical properties of the concrete test piece 1. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The figure is a structural schematic view of one embodiment of the boric acid test loading device for the concrete test piece of the boric acid pool of the containment of the nuclear power plant.

[0019] In the figure, 1 is a concrete test piece; 2 is a loading frame; 3 is a loading frame bolt; 4 is a sensor support; 5 is a sensor support bolt; and 6 is a strain sensor. DETAILED DESCRIPTION

[0020] The technical solutions of the utility model will be described clearly and completely in combination with the drawings and specific embodiments. Obviously, the described embodiments are part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0021] In the description of the utility model, it is understood that the terms "left end", "right end", "upper", "lower", "outer side", "inner side" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0022] The utility model will be described further in detail in connection with the drawings and specific embodiments.

[0023] Referring to Figure 1 The embodiment provides a kind of borate test loading device of nuclear power plant containment borate pool concrete test piece, including concrete test piece 1, loading frame 2, loading frame bolt 3, sensor support 4 and strain sensor 6;Two opposite sides of concrete test piece 1 are installed loading frame 2 and sensor support 4 respectively;Loading frame bolt 3 is installed between loading frame 2;Strain sensor 6 is installed between sensor support 4.

[0024] In the embodiment, as one of the realizable ways, the two opposite sides of the concrete test piece 1 are non-pouring surfaces of the concrete test piece 1.

[0025] In the embodiment, as one of the realizable ways, the concrete test piece 1 is a cuboid or a cube structure.

[0026] In the embodiment, as one of the realizable ways, the two opposite sides of the concrete test piece 1 are the top surface and the bottom surface of the concrete test piece 1.

[0027] In the embodiment, as one of the realizable ways, a plurality of loading frame bolts 3 are diagonally installed between the loading frames 2.

[0028] In the embodiment, as one of the realizable ways, a plurality of sensor supports 4 are symmetrically installed on the two opposite sides of the concrete test piece 1 respectively;The sensor supports 4 are installed on the concrete test piece 1 through sensor support bolts 5;The strain sensors 6 are installed between the sensor supports 4.

[0029] In the embodiment, as one of the realizable ways, the concrete test piece 1 is made according to the mix ratio required by the borate test of the concrete test piece.

[0030] In the embodiment, as one of the realizable ways, the loading frame 2 is made of high-strength borate corrosion-resistant material, and does not deform during the loading process of the concrete test piece 1 and the borate test process;The loading frame bolt 3 is made of high-strength borate corrosion-resistant material, the sensor support 4 is made of high-strength material, and the sensor support bolt 5 is made of high-strength material.

[0031] In this embodiment, as one of the ways to achieve, the two opposite sides of the concrete specimen 1 are respectively coated with interface agent before installing the loading frame 2.

[0032] In this embodiment, as one of the ways to achieve, the interface agent is cement mortar or neat grout.

[0033] The concrete specimen 1 is loaded by using the borate test loading device for the concrete specimen of the containment borate pool of the nuclear power plant, and the loading process comprises the following steps:

[0034] The two opposite sides of the concrete specimen 1 are selected as the installation surfaces of the loading frame 2; the loading frame 2 is installed on the installation surfaces after being coated with the interface agent, so as to ensure that the concrete specimen 1 is tightly combined with the loading frame 2;

[0035] The loading frame bolt 3 is installed diagonally between the loading frames 2, and the loading frame bolt 3 is gradually pre-tightened; during the installation process, the torque of the loading frame bolt 3 is tested by using a torque wrench, so as to ensure that the torques of the pre-tightened loading frame bolts 3 are basically the same;

[0036] A plurality of sensor supports 4 are symmetrically installed on the two opposite sides of the concrete specimen 1 on which the loading frame 2 is installed; the sensor supports 4 are installed on the concrete specimen 1 through the sensor support bolts 5; the strain sensors 6 are installed between the sensor supports 4; during the installation process, the data of the strain sensors 6 are observed in real time, so as to ensure that the data of the strain sensors 6 are in a reasonable range; after confirming that the data of the strain sensors 6 are correct, the sensor support bolts 5 are fastened, and the readings of the strain sensors 6 are recorded;

[0037] The concrete specimen 1 is pre-loaded by gradually fastening the loading frame bolts 3; during the pre-loading process, the diagonal step-by-step loading mode is adopted; when one of the strain sensors 6 shows that the target stress value is reached, the torques of the loading frame bolts 3 are gradually adjusted, so that the reading change amount of the strain sensors 6 located on the opposite sides and the maximum and minimum values of the torques of the loading frame bolts 3 differ by no more than 5%, and the loading is considered to be completed; the average value of the reading change amount of the strain sensors 6 is taken as the loading stress value;

[0038] The sensor support bolts 5, the sensor supports 4 and the strain sensors 6 are removed; during the removal process, the loading frame 2 and the loading frame bolt 3 should not be disturbed;

[0039] After the removal is completed, the concrete specimen 1, the loading frame 2 and the loading frame bolt 3 are integrally placed in the borate pool to perform the borate corrosion test.

[0040] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but can not therefore be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled person in the art, without departing from the utility model concept, several deformations and improvements can be made, which belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

Claims

1. A boric acid testing loading device for concrete specimens in a boric acid pool within a nuclear power plant containment vessel, characterized in that, It includes a concrete specimen (1), a loading frame (2), loading frame bolts (3), a sensor bracket (4), and a strain sensor (6); the loading frame (2) and the sensor bracket (4) are installed on the two opposite sides of the concrete specimen (1); the loading frame bolts (3) are installed between the loading frames (2); and the strain sensor (6) is installed between the sensor brackets (4).

2. The boric acid test loading device for concrete specimens in the boric acid pool of a nuclear power plant containment vessel according to claim 1, characterized in that, Both opposite sides of the concrete specimen (1) are non-cast surfaces of the concrete specimen (1).

3. The boric acid test loading device for concrete specimens in the boric acid pool of a nuclear power plant containment vessel according to claim 2, characterized in that, The concrete specimen (1) is a cuboid or cube structure.

4. The boric acid test loading device for concrete specimens in the boric acid pool of a nuclear power plant containment vessel according to claim 3, characterized in that, The two opposite sides of the concrete specimen (1) are the top and bottom surfaces of the concrete specimen (1).

5. The boric acid test loading device for concrete specimens in the boric acid pool of a nuclear power plant containment vessel according to claim 3, characterized in that, Multiple loading bracket bolts (3) are installed diagonally between the loading brackets (2).

6. The boric acid test loading device for concrete specimens in the boric acid pool of a nuclear power plant containment vessel according to claim 3, characterized in that, Multiple sensor brackets (4) are symmetrically installed on the two opposite sides of the concrete specimen (1), and strain sensors (6) are installed between the sensor brackets.

7. The boric acid test loading device for concrete specimens in the boric acid pool of a nuclear power plant containment vessel according to claim 6, characterized in that, The sensor bracket (4) is mounted on the concrete specimen (1) by the sensor bracket bolts (5).

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