Lossless fixing device for containment buttress of nuclear power plant

Abstract

The invention discloses a nuclear power plant containment buttress lossless fixing device which comprises two supports of the same structure, the two supports are arranged in parallel and are connected through a first screw (5), and each support comprises two Z-shaped supporting legs (1), a platform (2) and a tensioner (3); the two Z-shaped supporting legs (1) are arranged in a crossed mode, the crossed positions are hinged, an upper clamping part of each support is jointly formed between the two upper portions of the two Z-shaped supporting legs (1) and used for adjusting the included angle of the two Z-shaped supporting legs (1), and a lower clamping part of each support is jointly formed between the two lower portions of the two Z-shaped supporting legs (1) and used for clamping buttresses on the two sides of a containment. The platform (2) is installed at the top ends of the two Z-shaped supporting legs (1) and used for fixing a monitoring instrument. The tensioner (3) is arranged in the upper clamping parts in a penetrating mode, and the two ends of the tensioner (3) are detachably connected with the corresponding upper clamping parts respectively. According to the fixing device disclosed by the invention, lossless installation and lightweight transportation are realized, and the durability of the containment structure is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of containment structure monitoring, and in particular relates to a non-destructive fixing device for containment buttress columns of a nuclear power plant. Background Art

[0002] During the periodic pressure test of the double-layer containment structure of a nuclear power plant, displacement sensors, temperature sensors and data collectors need to be installed between the shells of the containment structure to monitor the relative displacement between the shells of the double-layer containment. The sensor measuring points are usually arranged near the buttresses of the containment structure. The installation method is to drill holes on the main structure of the containment at the measuring points, plant anchor bolts as the sensor fixing foundation, and then install the displacement sensors. This method is a destructive installation method. The installation process will damage the main structure of the containment and affect the durability of the concrete of the containment structure. In addition, the minimum spacing between the containment shells is only 1200mm-1500mm. Machinery cannot be used for transportation during the installation of each measuring point. Equipment and fixed brackets must be transported by manpower, which is time-consuming and labor-intensive. At the same time, affected by the size of the buttresses, the installation space for displacement sensors and data collectors is usually only 600mm-800mm, and drilling and planting anchor bolts are difficult. Summary of the invention

[0003] In view of the problems existing in the prior art, the present invention provides a non-destructive fixing device for nuclear power plant containment buttress columns, which solves the problem that the traditional method of drilling holes in the containment main structure leads to reduced durability of the containment structure and inconvenient installation.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is: to provide a non-destructive fixing device for the buttress columns of the containment of a nuclear power plant, including two brackets with the same structure, the two brackets are arranged in parallel and connected by a first screw respectively, and each bracket includes two Z-shaped legs, a platform and a tensioner; the two Z-shaped legs are arranged crosswise and hinged at the intersection, the two upper parts of the two Z-shaped legs jointly form the upper clamping part of each bracket, which is used to adjust the angle of the two Z-shaped legs, and the two lower parts of the two Z-shaped legs jointly form the lower clamping part of each bracket, which is used to clamp the buttress columns on both sides of the containment; the platform is fixed at the top of the two Z-shaped legs for placing monitoring instruments; the tensioner is penetrated in the upper clamping part, and its two ends are respectively detachably connected to the corresponding upper clamping part.

[0005] Furthermore, in the above-mentioned non-destructive fixing device for the buttress column of the containment of a nuclear power plant, a support foot is fixed to the lower end of each of the Z-shaped legs, and a side surface of the support foot is tightly fitted with the buttress column on the containment.

[0006] Furthermore, in the above-mentioned non-destructive fixing device for the buttress column of the containment of a nuclear power plant, the middle part of the side where the support foot fits with the buttress column is serrated.

[0007] Furthermore, in the above-described non-destructive fixing device for the containment buttress columns of a nuclear power plant, each of the Z-shaped legs is formed by staggered connection of multiple sections of channel steel I and multiple sections of channel steel II, and the opening width of the channel steel I is greater than the opening width of the channel steel II.

[0008] Furthermore, in the above-mentioned non-destructive fixing device for the containment buttress column of a nuclear power plant, the tensioner includes a tensioner body and two second screws fixed at both ends of the tensioner body, and the other sides of the two second screws are respectively connected to the corresponding two Z-shaped legs.

[0009] Furthermore, in the above-mentioned non-destructive fixing device for the containment buttress columns of a nuclear power plant, the tops of the two Z-shaped legs are connected to the platform respectively by a third screw rod with adjustable height.

[0010] The beneficial technical effects of the present invention are:

[0011] The present invention sets two Z-shaped brackets, each bracket uses the lever principle and the friction force of the support legs to achieve non-destructive installation and lightweight transportation of the bracket. At the same time, the entire installation process is not limited by space, which improves the durability of the containment structure and the convenience of installation. The present invention detachably fixes the platform on the top of the two Z-shaped legs, so that the height of the two ends of the platform can be adjusted to ensure the horizontality of the platform, solving the problem that the platform cannot be leveled at different installation angles of a single bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is an elevation view of a single bracket in the fixing device of the present invention;

[0013] Figure 2 It is a cross-sectional view of the fixing device AA of the present invention;

[0014] Figure 3 It is a cross-sectional view of the fixing device BB of the present invention;

[0015] Figure 4 It is a cross-sectional view of the fixing device CC of the present invention;

[0016] Figure 5 It is a cross-sectional view of the fixing device DD of the present invention;

[0017] Figure 6 It is a structural schematic diagram of the channel steel I at the intersection of a single bracket of the present invention;

[0018] Figure 7 This is a schematic diagram of the structure of the channel steel II at the intersection of a single bracket of the present invention;

[0019] Figure 8 It is a front view of the supporting foot of the present invention;

[0020] Fig. 9 A top view of the support leg of the present invention;

[0021] Fig.10 It is a schematic structural diagram of the L-shaped flat steel of the present invention.

[0022] In the figure:

[0023] 1-Z-type outrigger 2-platform 3-tensioner 4-support foot 5-first screw 6-third screw

[0024] 7-L-shaped flat steel 31-tensioner body 32-second screw DETAILED DESCRIPTION

[0025] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0026] It should be noted that the terms "first", "second", etc. in the specification, claims and drawings of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence, and it should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0027] like Figure 1-5 As shown, a non-destructive fixing device for a containment buttress column of a nuclear power plant of the present invention comprises two brackets of the same structure, the two brackets are arranged in parallel and symmetrically, and the two brackets are connected by a first screw 5, which is convenient for disassembly and assembly. Each bracket comprises two Z-shaped legs 1, a platform 2, a tensioner 3 and two feet 4. The two Z-shaped legs 1 are arranged crosswise and hinged at the intersection (can be hinged by bolts to facilitate adjustment of tightness). The two upper parts of the two Z-shaped legs 1 jointly form the upper clamping part of each bracket. By adjusting the distance of the upper clamping part, the angle of the two Z-shaped legs is adjusted to better cooperate with the buttress column. The two lower parts of the two Z-shaped legs 1 jointly form the lower clamping part of each bracket, which is used to clamp the buttress columns on both sides of the containment, thereby realizing non-destructive installation of the bracket. The platform 1 is fixed on the top of the two Z-shaped legs 1, and is used to place monitoring instruments (such as temperature sensors, displacement sensors or acquisition instruments). The tensioner 3 is inserted into the upper clamping part, and its two ends are detachably connected to the corresponding upper clamping part, thereby fixing the upper clamping part. Two legs 4 are fixed to the lower end of each Z-shaped leg, and one side surface is tightly fitted with the buttress column surface on the containment, ensuring that the monitoring instrument obtains accurate data.

[0028] In order to facilitate installation, each Z-shaped leg of the present invention can be formed by staggered connection of multiple sections of channel steel I and multiple sections of channel steel II (the number of channel steel I and channel steel II is determined according to needs), and the opening width of channel steel I is greater than the opening width of channel steel II. To facilitate the connection between the two, a through hole is opened on the bottom surface of the channel steel I at the intersection of the two Z-shaped legs 1, for the channel steel II to pass through the through hole, such as Figure 6 , 7 shown.

[0029] The tensioner 3 includes a tensioner body 31 and two second screws 32 fixed at both ends of the tensioner body. The other ends of the two second screws 32 pass through the upper parts of the corresponding two Z-shaped legs 1 and are locked by nuts, so that the upper clamping part can be fixed to ensure a suitable distance between the two.

[0030] The two ends of the platform 2 are connected to the top of the corresponding Z-shaped legs 1 through the third screw 6 and the L-shaped flat steel 7, so that the height of the two ends of the platform can be adjusted through the third screw 6 to ensure the horizontality of the platform 2. Figure 5 shown.

[0031] The support leg 4 is made of #18b channel steel, and the middle part of the side of the channel steel that fits with the buttress column is serrated, thereby increasing the friction between the support leg 4 and the buttress column, making the support leg and the buttress column fit more closely. Figure 8 , 9 shown.

[0032] The installation process of the fixing device of the present invention is described below:

[0033] 1. Preliminary assembly of two brackets

[0034] That is, one of the Z-shaped legs is passed through the middle through hole of the other Z-shaped leg, and is initially fixed with a screw. The nut is not tightened, but is only used as a limit. At this time, the two Z-shaped legs are in an active state, and the initial assembly of one bracket is completed; follow the same steps to assemble the other bracket. The same screw is used to connect the two brackets during installation. The spacing between the two brackets is determined according to the site conditions, and the recommended spacing value is not less than 200mm.

[0035] 2. Installation of support legs and tensioner

[0036] Initially place the two installed brackets at the planned installation position of the buttress, measure the distance between the two sides of the buttress, and install the tensioner and support feet according to the measurement results. During the assembly process, except for the screws and nuts at the support feet, which are not tightened and are only used for limiting, all bolts of the brackets must be securely tightened.

[0037] 3. Bracket fixation

[0038] Loosen the tensioner, gradually push the preliminarily assembled bracket to the installation position, adjust the support foot, ensure that one side (serrated surface) of the support foot is in contact with the side wall of the buttress column, gradually adjust the tensioner, and install the bracket in place. After confirming that the bracket is installed firmly, tighten the screw nut at the intersection of the Z-shaped support leg and the screw nut at the support foot.

[0039] 4. Sensor and platform installation

[0040] Initially place the platform, measure the distance between the platform and the top of the Z-shaped leg, and initially confirm the installation angle of the L-shaped connecting flat steel. Select a suitable third screw according to the measurement results. It should be noted that when installing the L-shaped flat steel, ensure that the L-shaped flat steel is installed on the outside of the channel steel at the top of the Z-shaped leg. Use the third bolt and matching nut to install and pre-tighten according to the measurement results. Install the platform, adjust the locking position of the third screw, ensure that the platform is in a horizontal state, and then lock all the screws and nuts on the bracket. Then you can install and measure the sensors and collectors.

[0041] In summary, the fixing device of the present invention overcomes the limitation that the mounting brackets of traditional sensors, collectors, etc. need to be fixed by drilling holes in the structure and then planting anchor bolts, and solves the problem that a single bracket cannot be leveled on platforms with different installation angles.

[0042] The above is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art can make equivalent substitutions or changes based on the technical solutions and inventive concepts disclosed by the present invention, and the obtained technical solutions should be included in the protection scope of the present invention.

Claims

1. A non-destructive fixing device for a containment buttress column of a nuclear power plant, comprising two brackets of the same structure, the two brackets are arranged in parallel and are respectively connected by a first screw (5), wherein: Each support comprises two Z-shaped legs (1), a platform (2) and a tensioner (3); the two Z-shaped legs (1) are cross-arranged and hinged at the intersection; the two upper parts of the two Z-shaped legs (1) together form an upper clamping part of each support, which is used to adjust the angle of the two Z-shaped legs (1); the two lower parts of the two Z-shaped legs (1) together form a lower clamping part of each support, which is used to clamp the buttresses on both sides of the containment; the platform (2) is installed at the top of the two Z-shaped legs (1) and is used to fix the monitoring instrument; the tensioner (3) is inserted into the upper clamping part, and its two ends are respectively detachably connected to the corresponding upper clamping part.

2. A non-destructive fixing device for a containment buttress column of a nuclear power plant as claimed in claim 1, characterized in that: A support foot (4) is fixed to the lower end of each Z-shaped support leg (1), and one side of the support foot (4) is tightly fitted with a buttress column on the containment vessel.

3. A non-destructive fixing device for a containment buttress column of a nuclear power plant as claimed in claim 2, characterized in that: The middle part of the side surface where the supporting foot (4) fits with the buttress column is serrated.

4. A non-destructive fixing device for a containment buttress column of a nuclear power plant as claimed in any one of claims 1 to 3, characterized in that: Each of the Z-shaped legs (1) is formed by staggered connection of multiple sections of channel steel I and multiple sections of channel steel II, and the opening width of the channel steel I is greater than the opening width of the channel steel II.

5. A non-destructive fixing device for a containment buttress column of a nuclear power plant as claimed in claim 4, characterized in that: The tensioner (3) comprises a tensioner body (31) and two second screw rods (32) fixed at two ends of the tensioner body, and the other sides of the two second screw rods (32) are respectively connected to the corresponding two Z-shaped legs (1).

6. A non-destructive fixing device for a containment buttress column of a nuclear power plant as claimed in claim 5, characterized in that: The tops of the two Z-shaped legs (1) are connected to the platform (2) respectively via a third screw rod (6) with adjustable height.

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