Equal-stress jack construction auxiliary device for containment gallery of nuclear power station

Abstract

The utility model provides a nuclear power station containment gallery equal stress jack construction auxiliary device, and belongs to the technical field of nuclear power station containment prestressed anchorage device installation, the nuclear power station containment gallery equal stress jack construction auxiliary device comprises a base and a supporting device, the supporting device is arranged in the vertical direction of the base and is fixedly connected with the base, and the base comprises two pieces of limiting square steel arranged in parallel; the two pieces of limiting square steel are fixedly connected through at least two pieces of I-shaped steel; the supporting device comprises four steel pipes, every two steel pipes are fixedly connected to one piece of limiting square steel, a square is defined by the four steel pipes, and the upper portions of the four steel pipes are connected through a jack limiting ring. The inner diameter of the jack limiting ring is smaller than the maximum outer diameter of the equal-stress jack, and the distance between every two steel pipes is larger than the maximum outer diameter of the equal-stress jack. And meanwhile, a fixing point is provided for installation and construction of the equal-stress jack.

Description

Technical Field

[0001] The invention relates to the technical field of prestressed anchor installation for a containment vessel of a nuclear power plant, and in particular to a stress jack construction auxiliary device for a containment vessel gallery of a nuclear power plant. Background Art

[0002] The reactor building containment of a water-based nuclear power plant utilizes a double-layer concrete structure, with the prestressing system distributed across the corridor, cylinder, ring beam, and dome. To ensure uniform distribution of prestress within the strands, control strand deformation during tensioning, and improve construction quality, the strands must be subjected to isostatic stress treatment before tensioning.

[0003] Compared to prestressing construction in other areas, corridor prestressing construction involves both prestressed axial and gamma steel strands, necessitating a larger engineering effort. The bellmouths of both the prestressed axial and gamma steel strands are located at the top of the corridor, a layout that places higher demands on construction operations. During the isostatic construction process, construction workers alone cannot raise and lower the isostatic jacks; forklifts and other equipment are required for assisted lifting. However, isostatic jacks are poorly compatible with lifting equipment like forklifts, making them incompatible for direct construction. Furthermore, the isostatic jacks lack securement during both installation and the isostatic application process, making it impossible to perform isostatic construction operations properly. Summary of the Invention

[0004] Purpose of the invention: The purpose of the present invention is to address the deficiencies of the existing technology and provide an auxiliary device for the construction of equal stress jacks in the containment gallery of a nuclear power plant. The present invention can improve the compatibility between the equal stress jack and the forklift, and realize the lifting and lowering of the equal stress jack with the help of the forklift, while providing a fixed point for the installation and construction of the equal stress jack.

[0005] Technical solution: The present invention describes an auxiliary device for the construction of equal stress jacks in the containment corridor of a nuclear power plant, comprising a base and a support device. The support device is arranged in the vertical direction of the base and is fixedly connected to the base. The base comprises two parallel limiting square steels, and the two limiting square steels are fixedly connected by at least two I-beams. The support device comprises four steel pipes, with every two steel pipes fixedly connected to a limiting square steel. The four steel pipes form a square, and the tops of the four steel pipes are connected by a jack limiting ring. The inner diameter of the jack limiting ring is smaller than the maximum outer diameter of the equal stress jack, and the distance between every two steel pipes is larger than the maximum outer diameter of the equal stress jack, ensuring the precise positioning of the jack during the tensioning process, thereby ensuring the quality of the prestressed construction.

[0006] Furthermore, a triangular plate is provided at the connection between each steel pipe and the limiting square steel; the use of the triangular plate can enhance the stability of the connection between the steel pipe and the limiting square steel, because the triangular structure has good stability and bearing capacity.

[0007] Furthermore, the cross-section of the limiting square steel is square, and the length and width of the square are both larger than the length and width of the cross-section of the forklift fork; the square cross-section of the limiting square steel usually has good structural strength and durability due to its symmetry and uniformly distributed stress, which is particularly important for long-term handling operations that are subject to repeated loads; in addition, since the size of the limiting square steel is larger than the fork, the wear of the fork during insertion and extraction can be reduced, thereby extending the service life of the fork.

[0008] Furthermore, the distance between the jack limit ring and the top surface of the limit square steel is greater than 0.5m. The larger distance provides more operating space, so that the staff has more range of movement when operating the jack, which is convenient for installation, adjustment and maintenance.

[0009] Furthermore, the length of the limiting square steel is shorter than the length of the forklift fork, which can make the entire device more stable.

[0010] Furthermore, the length of the limiting square steel ranges from 0.5 to 1 m.

[0011] Beneficial effects: Compared with the prior art, the advantages of the present invention are:

[0012] (1) By using the present invention, the stability and safety of the iso-stress jack during the construction process can be ensured, and possible accidents that may occur during the construction process can be reduced.

[0013] (2) The present invention not only realizes the combined construction of a forklift and an isostatic jack, but also makes the entire construction process easy to operate and can quickly switch between different bell mouths, thereby improving the isostatic construction efficiency and ensuring the safety of the isostatic jack installation and construction process;

[0014] (3) The present invention provides fixing and limiting measures for the construction of the iso-stress jack, ensuring that the iso-stress jack does not move during the iso-stress application process, providing support for the iso-stress application, and ensuring construction safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 It is a schematic diagram of the actual working of the present invention;

[0017] Figure 3 is another schematic diagram of the actual working of the present invention;

[0018] The markings in the figure are: 1. Limiting square steel; 2. I-beam; 3. Steel pipe; 4. Triangle plate; 5. Jack limiting ring; 6. Forklift; 7. Equal stress jack; 8. Positioning steel fork; 9. Steel strand; 10. Anchor. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the embodiments.

[0020] like Figure 1 The device, shown here, is an auxiliary construction device for isostress jacks in a nuclear power plant containment gallery. The device comprises a base and a support mechanism. The support mechanism is arranged perpendicular to the base and fixedly connected to the base. The base comprises two parallel spacer steel bars 1, each of which has a square cross-section, the length and width of which are both greater than those of a forklift fork. The two spacer steel bars 1 are fixedly connected by at least two I-beams 2. The support mechanism comprises four steel pipes 3, each of which is provided with a triangular plate 4 at its connection to the spacer steel 1. Every two steel pipes 3 are fixedly connected to one spacer steel bar 1, forming a square. The four steel pipes 3 are connected above by a jack limit ring 5. The inner diameter of the jack limit ring 5 is smaller than the maximum outer diameter of the isostress jack, and the distance between every two steel pipes 3 is greater than the maximum outer diameter of the isostress jack. The length of the spacer steel bars 1 is less than the length of the forklift fork, and the length of the spacer steel 1 is 0.6m. The distance between the jack limiting ring 5 and the top surface of the limiting square steel 1 is greater than 0.5m.

[0021] like Figure 2 and Figure 3 As shown, the method of using this embodiment is as follows:

[0022] When carrying out the equal stress jack installation operation, first, install the equal stress jack 7 on the auxiliary device, and fix the jack through the steel pipe 3 and the jack limit ring 5; insert the fork of the forklift 6 into the limiting square steel 1 of the device, raise the entire auxiliary device by the forklift 6, and ensure that the equal stress jack 7 is close to the end of the steel strand 9; use the positioning steel fork 8 to comb and position the steel strand 9; raise the auxiliary device to make the steel strand 9 pass through the equal stress jack 7 accurately until the equal stress jack 7 fits the anchor 10, and complete the installation of the equal stress jack 7; keep the auxiliary device fixed, apply equal stress to the steel strand 9, and lower the auxiliary device after the equal stress operation is completed to separate the equal stress jack 7 and the steel strand 9.

[0023] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes may be made to it in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A stress jack construction auxiliary device for a nuclear power plant containment gallery, comprising a base and a support device, wherein the support device is arranged in a vertical direction of the base and is fixedly connected to the base, and is characterized in that: The base comprises two parallel limiting square steels (1), the two limiting square steels (1) being fixedly connected via at least two I-beams (2); the supporting device comprises four steel pipes (3), every two steel pipes (3) being fixedly connected to one limiting square steel (1), the four steel pipes (3) forming a square, the tops of the four steel pipes (3) being connected via a jack limiting ring (5), the inner diameter of the jack limiting ring (5) being smaller than the maximum outer diameter of the iso-stress jack, and the distance between every two steel pipes (3) being larger than the maximum outer diameter of the iso-stress jack.

2. The stress jack construction auxiliary device for the containment gallery of a nuclear power plant according to claim 1, characterized in that: A triangular plate (4) is provided at the connection between each steel pipe (3) and the limiting square steel (1).

3. The stress jack construction auxiliary device for the containment gallery of a nuclear power plant according to claim 1, characterized in that: The cross section of the limiting square steel (1) is a square, and the length and width of the square are both greater than the length and width of the cross section of the forklift fork.

4. The stress jack construction auxiliary device for the containment gallery of a nuclear power plant according to claim 1, characterized in that: The distance between the jack limiting ring (5) and the top surface of the limiting square steel (1) is greater than 0.5m.

5. The stress jack construction auxiliary device for the containment gallery of a nuclear power plant according to claim 1, characterized in that: The length of the limiting square steel (1) is smaller than the length of the forklift fork.

6. The stress jack construction auxiliary device for the containment gallery of a nuclear power plant according to claim 5, characterized in that: The length of the limiting square steel (1) ranges from 0.5 to 1 m.

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